CN115402450A - Balance car and supporting framework thereof - Google Patents

Abstract

The invention discloses a balance car and a support framework thereof, which comprise a wheel connecting part connected with a wheel and a support part used for being trampled and carried by a rider, wherein the support framework is provided with two plate-shaped support parts used for respectively forming two pedaling areas, an intermediate connecting part used for connecting the two plate-shaped support parts is arranged between the two plate-shaped support parts, the two ends of the support framework are wheel connecting parts, and a reinforcing groove crossing the two plate-shaped support parts is arranged between the two wheel connecting parts. This scheme has simplified balance car body structure, has reduced manufacturing cost.

Description

Balance car and supporting framework thereof

Technical Field

The invention belongs to the technical field of balance cars, and particularly relates to a two-wheel-driven balance car and a supporting framework thereof.

Background

The operation principle of the two-wheeled electrodynamic balance vehicle, also called a human-computer interaction motion sensing vehicle and a thinking vehicle, is mainly established on the basic principle called dynamic stability, the gyroscope and the acceleration sensor in the vehicle body are utilized to detect the change of the vehicle body posture, and a servo control system is utilized to accurately drive a motor to carry out corresponding adjustment so as to keep the balance of the system.

The existing man-machine interaction motion sensing vehicle is generally divided into two types, namely an operation rod and a non-operation rod, wherein the man-machine interaction motion sensing vehicle with the operation rod is provided with the man-machine interaction motion sensing vehicle, and the forward movement, the backward movement and the steering of the man-machine interaction motion sensing vehicle are specifically controlled by the operation rod. The human-computer interaction somatosensory vehicle without an operating rod is a foot-controlled balance vehicle, the forward and backward movement of the vehicle is controlled by the integral inclination of a vehicle body, the turning control principle of the existing foot-controlled balance vehicle has two modes, one mode is a traditional swing vehicle structure (patent documents with the publication number of CN104029769A and the like), the turning of the vehicle is controlled by controlling the rotating speed difference of a hub motor by sensing the difference of the rotating angles of two pedals, the vehicle body structure of the mode inevitably comprises a complex rotating mechanism, a limiting mechanism for limiting the rotating angle of a pedal assembly, two groups of gyroscopes for sensing the angle, an acceleration sensor and other assemblies, when a rider controls the vehicle, the rider twists the pedal assemblies at two sides by different amplitudes to further realize turning control, and the structure is relatively complex; the other type is that support chassis is an overall structure, and the unable relative rotation of pedal subassembly in both sides also is called and feels the car, and the difference that produces by the step gesture through two pedal positions of foil gage sensing, the difference in rotation speed of control in-wheel motor realizes controlling the vehicle and turns, wherein, produces the difference mode by the step gesture and includes following several kinds again:

1) As disclosed in patent documents CN205396356U, CN110641594A, CN212354251U, CN110641593A, CN208393563U, US10843765B2 and the like, a rider adjusts the gravity centers of the left and right feet to apply different gravity/pressure to the two pedal assemblies, detects the gravity/pressure difference of the pedal assemblies, and controls the in-wheel motor to drive the vehicle to turn by the controller; data of gravity/pressure changes caused by fluctuations in a part of riding needs to be rejected.

2) As disclosed in patent documents CN208216900U, CN110758620A, CN111591382a and the like, the intention of the rider is determined by sensing the gravity/pressure change between the front and rear soles of both feet of the rider, and the vehicle is driven to turn by controlling the in-wheel motor according to the difference in change between the two feet by the controller.

Among the prior art, the automobile body is an overall structure's balance car, generally adopts metal support frame, and the support frame who adopts the metal material can have higher support intensity, and bearing capacity is strong, but also has following several shortcomings:

1. the metal supporting framework is not easy to decorate in appearance, high in modeling and processing cost, and only suitable for being hidden inside the vehicle body but not suitable for being exposed outside the vehicle body, so that the supporting framework mostly needs to be covered by an external shell.

2. The material cost and the manufacturing and processing cost of the supporting framework made of metal materials are high, so that the manufacturing cost of the balance car is high.

3. The supporting framework made of metal materials is heavy in weight, so that the whole balance car is large in mass.

4. In the prior art, a metal pipe is also adopted as a support framework, but the connection part of the metal pipe and the wheel shaft needs to be particularly reinforced through a reinforcing structure or a reinforcing part, so that the structure is complex, and the processing and manufacturing cost is still higher.

Disclosure of Invention

In order to solve the above technical problems, the present invention aims to provide a balance car and a support frame thereof, which simplify the structure of the balance car body and reduce the manufacturing cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a support skeleton of balance car, is including the wheel connecting portion that is used for being connected with the wheel and the supporting part that is used for supplying the rider to trample and bear, and this support skeleton is a unitary structure, and this support skeleton has two platelike supporting parts that are used for forming two pedal regions respectively, is the intermediate junction portion that is used for connecting two platelike supporting parts between two platelike supporting parts, and the both ends of this support skeleton are wheel connecting portion, are provided with the reinforcing groove that spans two platelike supporting parts between two wheel connecting portions. Thus, the vehicle body structure is simplified and the manufacturing cost is reduced.

Preferably, the support frame is of an integrally formed rigid plastic construction. The hard plastic is a plastic material with certain rigidity and capable of bearing required weight: such as PP, ABS, PC, PVC, etc. or plastics compounded with one or more of these.

Preferably, the wheel connecting part clamps and fixes the wheel shaft by the wheel shaft fixing plate and the wheel shaft pressing plate in a vertical matching way.

Preferably, the supporting framework is provided with a fixing plate mounting groove for embedding a wheel axle fixing plate and an anti-skidding structure for preventing a rider from treading and skidding.

Preferably, the stiffening grooves are located on the wheel axis.

Preferably, a rigid reinforcing member is filled in the reinforcing groove, and the reinforcing member includes a metal pipe, a metal rod, a plastic pipe, a plastic rod or a wood rod.

Preferably, the reinforcing member is a metal square pipe.

Preferably, the depth of the reinforcing groove is not less than 3cm.

Preferably, a bead groove structure formed by a plurality of beads and reinforcement grooves distributed at intervals is provided at a portion between the wheel connecting portion and the reinforcement groove.

Preferably, the intermediate connecting portion has a width reduced with respect to a plate-like support frame having wheel stoppers formed extending on both front and rear sides thereof adjacent to the wheel, so that the entire support frame has a butterfly wing shape like an X; a plurality of sensors for detecting bearing pressure are arranged in each pedal area, pedal panels for covering the sensors are fixedly arranged on the supporting framework, the pedal panels in the two pedal areas are connected into a whole, and the integrally formed pedal panel is arranged in the middle of the supporting framework and covers the reinforcing groove and the wheel connecting part; the pedal panel is made of flexible or elastic plastic and/or rubber and is made into a thin plate shape.

A balance car comprises the support framework.

According to the invention, the supporting framework is of the integrally formed rigid plastic structure, so that the supporting framework can be exposed outside the vehicle body, more appearance shapes can be provided, the internal structure of the vehicle body is simpler, the space is larger, and the manufacturing cost of the balance vehicle is reduced by adopting the reinforcing groove structure under the condition of ensuring the bearing capacity of the vehicle body.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is an exploded view of a balance car according to embodiment 1 of the present invention;

fig. 2 is a perspective view of a balance car according to embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of a balance car according to embodiment 1 of the present invention (with the integrated pedal panel removed);

FIG. 4 is a schematic structural view of a balance car according to embodiment 1 of the present invention (with the lower case removed);

FIG. 5 is a schematic structural view of a support frame (with sensors and reinforcements installed) according to embodiment 1 of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

FIG. 7 is a schematic view showing the structure of a support frame according to embodiment 1 of the present invention (without sensors and reinforcing members mounted);

FIG. 8 is a partial enlarged view of FIG. 7 at B;

FIG. 9 is a partial cross-sectional view of a support armature according to example 1 of the present invention;

FIG. 10 is a bottom view of the step panel of the present invention;

FIG. 11 is an enlarged view at C of FIG. 10;

FIG. 12 is a schematic diagram of the construction of a sensor according to the present invention;

FIG. 13 is a top plan view of the balance car of the present invention;

FIG. 14 is a cross-sectional view I-I of FIG. 13;

FIG. 15 is a schematic structural view of example 2 of the present invention;

fig. 16 is a schematic structural diagram of embodiment 3 of the present invention.

Wherein the reference numerals are as follows:

1. a wheel; 101. a wheel axle fixing plate; 102. a wheel axle pressing plate; 103. a fastener; 2. a pedal panel; 3. a reinforcement; 4. a sensor; 401. a fixed part; 402. a movable portion; 403. a connecting portion; 5. a controller; 6. a battery 6; 7. A lower housing; 8. a support framework; 801. a display module; 802. a reinforcing groove; 803. an anti-slip structure; 804. a sensor mounting groove; 8041. a sensor cavity; 8042. the sensor is fixed with a buckle; 8043. a sensor support portion; 8044. a sensor wire-passing groove; 805. a fixing plate mounting groove; 806. a rib and groove structure; 807. wheel side stoppers.

Detailed Description

The invention is further described with reference to the following figures and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, the singular is also intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the features, steps, operations, devices, components, and/or combinations thereof.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

For convenience in expression, the horizontal direction parallel to the straight-going direction of the human-computer interaction motion sensing vehicle is taken as the front-back direction, the horizontal direction perpendicular to the straight-going direction of the human-computer interaction motion sensing vehicle is taken as the left-right direction, and the vertical direction perpendicular to the straight-going direction of the human-computer interaction motion sensing vehicle is taken as the up-down direction.

Example 1:

as shown in fig. 1 and 2, the balance vehicle comprises a vehicle body and a wheel 1 mounted on the vehicle body, wherein the vehicle body comprises a supporting framework 8, a pedal panel 2, sensors 4, a controller 5, a battery 6 and a lower shell 7, the wheel 1 is mounted on two sides of the supporting framework 8, two pedal areas for two feet of a rider to pedal are arranged on the supporting framework 8, the pedal panel 2 covers all or part of the two pedal areas, a plurality of sensors 4 for sensing bearing pressure are arranged between the pedal panel 2 and the supporting framework 8, and the plurality of sensors 4 respectively correspond to different parts of two soles of the feet of the rider; the supporting framework 8 and the lower shell 7 are covered up and down to form a containing cavity in the vehicle body, and the controller 5 and the battery 6 are installed in the containing cavity.

In this embodiment, the vehicle body is an integral structure, that is, although the vehicle body is provided with two pedal areas, the two pedal areas are arranged on the same vehicle body platform, which is different from a swing car that is provided with two pedal platforms that can be twisted relatively. In this embodiment, the supporting framework is also an integral structure.

The support framework is used for bearing and installation wheel, mainly includes the wheel connecting portion that is used for being connected with the wheel and is used for supplying the rider to trample the supporting part that bears, wheel connecting portion and supporting part integrated into one piece or direct fixed connection or via the indirect fixed connection of other rigid part to guarantee that the rider's weight transmits to the wheel via the support framework.

In the present embodiment, as shown in fig. 1 and fig. 3, the supporting frame 8 is an integrally formed plate-shaped structure (corresponding to a cover body, the supporting frame and the lower housing are fixedly connected to form a vehicle body housing), two ends of the supporting frame 8 are wheel connecting portions, the wheel connecting portions are vertically matched with and clamp a wheel axle of the wheel 1 through a wheel axle fixing plate 101 and a wheel axle pressing plate 102, the supporting frame 8 has two plate-shaped supporting portions for respectively forming two pedal areas, the plate-shaped supporting portions are used for a rider to pedal for carrying weight, an intermediate connecting portion for connecting the two plate-shaped supporting portions is arranged between the two plate-shaped supporting portions, the intermediate connecting portion is contracted with a width relative to the plate-shaped supporting portions, the supporting frame 8 extends to form wheel side blocking portions 807 at front and rear sides near the wheel 1, so that the entire supporting frame has a butterfly wing shape similar to an X shape.

In this embodiment, the support frame 8 is of an integral plate structure, and the plate structure has a large area, high strength and a small thickness, so that the parts can be conveniently arranged and installed, especially, the battery can be conveniently installed, the ground clearance of the vehicle is large, and the trafficability characteristic is good. The plate-like structure is not limited to a flat plate structure, and includes various kinds of substantially plate-like structures having a curved or uneven structure or extending portions in various directions.

In other embodiments, the supporting frame may also be a rod-shaped structure, a tubular structure, a block-shaped structure, a cylindrical structure or a cover structure that are integrally formed or fixedly connected, or may also be a structure that is directly fixed or indirectly fixedly connected after being separately formed, for example, the wheel connecting portion of the supporting frame is a plate-shaped structure, a rod-shaped structure, a tubular structure, a block-shaped structure, a cylindrical structure or a cover structure, the supporting portion of the supporting frame is a plate-shaped structure, a rod-shaped structure, a tubular structure, a block-shaped structure, a cylindrical structure or a cover structure, and the wheel connecting portion and the supporting portion are directly fixedly connected or fixedly connected through a rigid member (the rigid member may also be one or more of a plate-shaped structure, a rod-shaped structure, a tubular structure, a block-shaped structure, a cylindrical structure or a cover structure, such as all or part of the upper cover or the lower cover).

The supporting framework can be made of metal materials. The metal material rigidity support performance is good, not only can install each part fixed to can effectively ensure the power explosion-proof, improve the security. The metal material is preferably an aluminum material.

In other embodiments, all or part of the supporting framework may be a rigid component made of metal, or may be made of non-metallic materials with certain rigidity, such as wood, plate, rigid plastic, etc. The support framework can be formed in one step, or can be formed through multiple processes, such as turning, milling, grinding, drawing, welding, injection molding and the like. The support frame is not limited to a unitary structure and may be assembled from multiple parts.

The support framework made of metal materials can have higher support strength and strong bearing capacity, but also has the following defects:

1. the metal supporting framework is not easy to decorate in appearance, high in modeling and processing cost, and only suitable for being hidden inside the vehicle body but not suitable for being exposed outside the vehicle body, so that the supporting framework mostly needs to be covered by an external shell.

2. The material cost and the manufacturing and processing cost of the supporting framework made of metal materials are high, so that the manufacturing cost of the balance car is high.

3. The supporting framework made of metal materials is heavy, so that the whole balance car is large in weight.

4. In the prior art, a metal pipe is also adopted as a support framework, but the connection part of the metal pipe and the wheel shaft needs to be particularly reinforced through a reinforcing structure or a reinforcing part, so that the structure is complex, and the processing and manufacturing cost is still higher.

In the present embodiment, the supporting frame 8 (including the two wheel connecting portions and the two supporting portions) is preferably of an integrally formed rigid plastic structure. The hard plastic is a plastic material with certain rigidity and capable of bearing required weight: such as PP, ABS, PC, PVC, etc. or plastics compounded by one or more of them. Therefore, the supporting framework can be exposed outside the vehicle body, more appearance models can be provided, and the manufacturing cost of the balance vehicle is reduced.

In order to improve the rigidity and strength of the plastic support frame, in the preferred embodiment, the wheel connecting portions near the two ends of the support frame 8 are vertically matched with the wheel shaft fixing plate 101 and the wheel shaft pressing plate 102 to clamp and fix the wheel shaft of the wheel 1, so that the wheel shaft pressing plate 102, the wheel shaft fixing plate 101, the wheel connecting portions vertically clamped by the wheel shaft fixing plate and the wheel shaft are firmly combined into a whole, and the connecting strength of the wheel shaft and the wheel connecting portions is greatly increased. Like this, when the rider stepped on the balance car, two wheels inwards exerted the extrusion force to the support chassis from both sides through the wheel connecting portion that links as an organic whole, have improved the bulk strength of support chassis.

This embodiment is preferred, and support chassis 8 is provided with the reinforcement groove 802 that spanes two supporting parts between two wheel connection portions, and the horizontal bearing structure that adopts the formation of a plurality of reinforcement groove of certain degree of depth has stronger adaptability and horizontal crowding and draws bearing capacity, can increase plastic support chassis's firm degree.

In order to further improve the rigidity and the bearing capacity of the plastic supporting framework, in this embodiment, preferably, the reinforcing groove 802 is filled with a rigid reinforcing member 3, and the reinforcing member 3 may be a metal pipe, a metal rod, a plastic pipe, a plastic rod, a wood rod, or the like. Like this, can provide higher bearing capacity by the reinforcement between two supporting parts of supporting framework, avoided the problem that the big influence bearing capacity of strengthening the groove span, the extrusion force that receives the supporting framework conducts to between reinforcement tip and the wheel connecting portion, and the extrusion deformation span is littleer, and firm degree is higher to promote the bearing capacity of whole car.

In this embodiment, the rigid reinforcing member is preferably a metal square pipe. Thus, the structure is simple, the processing and material taking are convenient, and the manufacturing cost is low.

In the preferred embodiment, the opening of the reinforcing groove 802 is upward, so that the reinforcing part is upward during the transportation and normal use of the vehicle, and therefore, the installation is convenient, the reinforcing part is not easy to fall out of the reinforcing groove, and a rider steps on the reinforcing part during the use, so that the reinforcing part is in closer contact with the supporting framework and is not easy to loosen.

In the preferred embodiment, as shown in fig. 9, the reinforcing member 3 and the corresponding reinforcing groove 802 have a certain depth (preferably not less than 3 cm), so that when a user steps on the balance car, the user applies a large force to the two ends of the reinforcing member, usually to force the reinforcing member to bend in the up-and-down direction, through the design of the end portion of the reinforcing member and the depth of the reinforcing groove, the end wall of the reinforcing groove of the supporting framework can generate a deformation that prevents the end portion of the reinforcing member from generating a non-vertical direction, and at the same time, the close fit degree between the reinforcing member and the reinforcing groove can be further enhanced.

In a further preferred embodiment, as shown in fig. 3, a rib groove structure 806 formed by a plurality of ribs and reinforcing grooves distributed at intervals is disposed at a position between the wheel connecting portion and the reinforcing groove 802 of the supporting framework 8, and the rib groove structure 806 has strong adaptability and transverse squeezing and pulling bearing capacity, so that the overall structure of the plastic supporting framework is firmer and the bearing capacity is stronger.

The plastic supporting framework in the embodiment adopts an integrated plate-shaped structure, the wheel connecting part connected with the wheel and the supporting part used for the rider to trample and bear are organically combined into an integrated structure, the stress synergy of the wheel connecting part and the supporting part is fully utilized, the plastic forming reinforcing structure is adopted, more connecting structures do not need to be arranged between the rigid reinforcing part and the wheel axle, the supporting framework connecting structure is simplified under the condition of ensuring strong bearing capacity, the mounting is convenient, and the manufacturing cost of the balance car is greatly reduced.

In the present embodiment, as shown in fig. 3, 5 and 7, the supporting frame 8 is provided with a fixing plate mounting groove 805 for mounting the wheel axle fixing plate 101, an anti-skid structure 803 for preventing a rider from pedaling and skidding, and a display module 801 for displaying electric quantity. The lower housing 7 is provided with a decorative lamp module 701 and a tail lamp module 702.

In the prior art, a metal supporting framework is generally hidden inside a balance car shell, so that the internal space of a car body is occupied more, and because an upper car body shell is used for protecting and fixing internal parts and bearing weight, the structural strength of the upper car body shell is higher, the thickness is larger, the flexibility and the elasticity of materials in a pedal area are insufficient for integrating the upper car body shell with a left pedal area and a right pedal area, and the rigidity strength of other areas is insufficient, if two materials are adopted for co-extrusion injection molding or insert injection molding, the manufacturing difficulty is high, and the cost is high.

Preferably, the supporting framework is used as an upper shell of the vehicle body, most of the supporting framework is exposed outside the vehicle body, a plurality of sensors for detecting the change of the bearing pressure are arranged in each pedal area of the supporting framework, and the controller controls the balance vehicle to move forwards, move backwards and turn according to detection signals of the gyroscope and the sensors. The supporting framework 8 is provided with a plurality of pedal panels 2, and the pedal panels 2 cover the sensors 4.

In the preferred embodiment, the pedal panel 2 is fixedly mounted on the supporting framework 8, so that the pedal panel 2 can be made of flexible or elastic plastic and/or rubber, has better deformability and resilience, can effectively conduct pressure to the sensor only through deformation of the pedal panel, enables the sensor to better sense bearing pressure change, and the supporting framework can be made of plastic or other rigid materials with better rigidity strength, so that the vehicle body has stronger bearing capacity, is firmer and more stable, and better protects internal parts of the vehicle body; meanwhile, the fixed connection mode of the pedal panel 2 and the supporting framework 8 also contributes to the sealing between the two.

In the present embodiment, as shown in fig. 10, 13 and 14, the two footrest panels 2 in the footrest area are integrally connected, and the two footrest panels 2 extend outward to form a wheel cover portion covering a part of the wheel, and the two footrest panels and the two wheel cover portions are integrally formed. Therefore, the appearance is attractive, the assembly and the installation are convenient, and the reinforcing grooves 802 and the fixing plate installation grooves 805 on the supporting framework 8 can be covered.

In this embodiment, as shown in fig. 10 and 11, the bottom of the pedal panel is preferably provided with a protrusion 201 which interferes with the movable part of the sensor. The hatched portion in fig. 11 and 12 shows the contact position of the protrusion 201 with the movable portion 402 of the sensor 4.

In other embodiments, the two footrest panels 2 can also be independently mounted on the support frame 8, and the footrest panels 2 preferably cover only a part of the footrest area, so that when the rider steps on the footrest area of the vehicle body, the rider can directly contact the support frame to transfer the weight to the support frame, thereby improving the rider's experience.

In the present embodiment, as shown in fig. 1, the vehicle body outer shell is mainly composed of a supporting framework 8 and a lower shell 7, and is used for decorating and covering and protecting internal components. Thus, the vehicle body structure is simpler, and the manufacturing cost is lower.

In this embodiment, as shown in fig. 6, the sensor 4 is a strain gauge sensor, and includes a strain gauge and an elastic base, where the strain gauge is a resistance-type strain gauge and is mounted on the elastic base. The elastic base comprises a fixing portion 401 and a movable portion 402, the fixing portion 401 is fixedly mounted on the supporting framework 8, the movable portion 402 is arranged in a suspending mode and can move up and down, the fixing portion 401 and the movable portion 402 are connected into a whole through a connecting portion 403, and the strain gauge is fixed on the connecting portion 403 and used for detecting the deformation degree of the connecting portion 403.

Preferably, in this embodiment, the strain gauge is a wire type resistance strain gauge or a foil type resistance strain gauge.

In this embodiment, as shown in fig. 12, the elastic base is preferably sheet-shaped as a whole, the fixed portion 401 and the movable portion 402 are both arranged in a chevron shape and are opposed to each other, both side portions of the chevron shape of the movable portion 402 are located between both side portions of the chevron shape of the fixed portion 401, and a middle portion of the chevron shape of the movable portion 402 and a middle portion of the chevron shape of the fixed portion 401 are connected by a connecting portion 403.

Correspondingly, in this embodiment, preferably, a sensor mounting groove 804 for accommodating the sensor 4 is arranged on the support frame 8, a sensor supporting portion 8043 for supporting the fixed portion 401 for fixing the sensor 4 and a sensor cavity 8041 for allowing the movable portion 402 to move up and down are arranged in the sensor mounting groove 804, the sensor supporting portion 8043 is convexly arranged on three sides of the sensor mounting groove 804 so as to be capable of supporting the bottom edge portion and two side edge portions of the shape like the Chinese character 'shan' of the fixed portion 401, the sensor cavity 8041 is arranged between the sensor supporting portions 8043 surrounded by three sides, and a sensor wire passing groove 8044 for allowing a connecting wire of a strain gauge to pass through is further arranged on the sensor supporting portion 8043 at a position corresponding to the root of the middle portion of the shape like the Chinese character 'shan' of the fixed portion 401.

In the prior art, a strain sensor is generally fixed by bonding, welding or fasteners and the like, and the problems of difficult positioning, poor adaptivity after fixation, inconvenient installation and maintenance and the like exist. Therefore, in the present embodiment, the sensor 4 is preferably installed in the sensor installation groove 804 by using the sensor fixing buckle 8042, so that the installation and maintenance are convenient, and the self-adaptability is better.

In this embodiment, as shown in fig. 7 and fig. 8, two sensor fixing buckles 8042 are preferably disposed on the supporting framework 8, and the two sensor fixing buckles 8042 are respectively buckled with two side portions of the "mountain" shape of the fixing portion 401 of the sensor 4. Thus, the installation is convenient and flexible.

In the present embodiment, as shown in fig. 1 and 3, two sensors 4 for detecting a load-bearing force are provided in each of two foot regions of the support frame 8, and four sensors 4 are provided in total, and these four sensors 4 are provided corresponding to the front and rear sole portions of the left and right feet of the rider.

In order to improve the detection sensitivity of the sensors 4, in the present embodiment, it is preferable that the movable portions 402 of the four sensors 4 are disposed to be inclined outward, respectively, as shown in fig. 5.

The rider stands the balance car, and under the influence of human weight, the foil gage of four sensors 4 can produce the downward deformation of equidirectional, and its deformation degree is corresponding rather than bearing the weight of the force, and the resistance of foil gage can take place corresponding change, and according to the atress difference at the sole position around two pedal regions, the angle of heeling changes (detect with the help of gyroscope etc.) around combining the automobile body, can sense the driving intention of rider, and corresponding drive balance car moves ahead, moves back or turns. Of course, the bearing pressure change detected by the four sensors can also be used for sensing whether a person stands on the pedal area of the vehicle body.

Example 2:

the only difference from example 1 is that: as shown in FIG. 15, the elastic bases of the front and rear sensors 4 of the same foothold area are integrally formed and are fixed in the sensor mounting grooves 804 of the support frame 8 by fasteners to form an I shape. The rest is the same as in example 1.

Example 3:

the only difference from example 1 is that: as shown in fig. 16, the four sensors 4 are respectively covered with independent footboard panels mounted on the support frame 8 in such a manner as to be movable up and down or elastically deformable. A corresponding trim cover is mounted in the middle of the support frame 8 along the wheel axis to cover the reinforcement grooves 802 and the fixing plate mounting grooves 805 on the support frame 8, and to form a wheel cover portion covering a part of the wheel. The rest is the same as in example 1.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a support skeleton of balance car, includes the wheel connecting portion that is used for being connected with the wheel and is used for the support portion that the person of taking advantage of trampling by the rider bears, its characterized in that, this support skeleton be an overall structure, this support skeleton has two platelike support portions that are used for forming two pedal regions respectively, be the intermediate junction portion that is used for connecting two platelike support portions between two platelike support portions, this support skeleton's both ends are wheel connecting portion, be provided with the reinforcing groove that spans two platelike support portions between two wheel connecting portions.

2. The support frame of a balance vehicle of claim 1, wherein the support frame is of an integrally formed rigid plastic construction; the wheel connecting part is matched with and clamps the wheel shaft up and down through the wheel shaft fixing plate and the wheel shaft pressing plate.

3. The supporting frame of the balance vehicle as claimed in claim 2, wherein the supporting frame is provided with a fixing plate mounting slot for embedding the wheel axle fixing plate and an anti-slip structure for preventing the rider from pedaling.

4. The balance car support frame of claim 1, wherein the reinforcement channel is located on the wheel axis.

5. The support frame of claim 1, wherein a rigid reinforcement member is filled in the reinforcement groove, and the reinforcement member comprises a metal pipe, a metal rod, a plastic pipe, a plastic rod or a wood rod.

6. The support frame of claim 5, wherein the reinforcement is a metal square tube.

7. The support frame of a balance car according to claim 1, wherein the depth of the reinforcing groove is not less than 3cm.

8. The support frame for a balance vehicle according to claim 1, wherein a rib groove structure formed by a plurality of ribs and reinforcing grooves distributed at intervals is provided between the wheel connecting portion and the reinforcing grooves.

9. The support frame for a balance vehicle according to claim 1, wherein the intermediate connecting portion has a width reduced with respect to the plate-like support portion, and the support frame is formed with wheel stoppers extending from both front and rear sides of the support frame near the wheel, so that the entire support frame has a wing-like shape of an X; a plurality of sensors for detecting bearing pressure are arranged in each pedal area, pedal panels for covering the sensors are fixedly arranged on the supporting framework, the pedal panels in the two pedal areas are connected into a whole, and the integrally formed pedal panels are arranged in the middle of the supporting framework and cover the reinforcing grooves and the wheel connecting parts; the pedal panel is made of flexible or elastic plastic and/or rubber and is made into a thin plate shape.

10. A balance vehicle comprising a support skeleton as claimed in any one of claims 1 to 9.

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