CN201042485Y - electric wheelchair - Google Patents

Abstract

The invention discloses an electric wheelchair, which is mainly composed of a front wheel seat and a middle wheel seat pivotally connected to the pivotal ends of a frame, and an elastic member is arranged between them to provide a buffer for the front wheel seat and the middle wheel seat to pivot relative to the frame. The electric wheelchair has the advantages of delicate components, easy design and production, low manufacturing cost, easy assembly and maintenance, and durability.

Description

electric wheelchair

technical field

The utility model relates to an electric wheelchair, specifically an electric wheelchair that can run smoothly on uneven roads.

Background technique

The known electric wheelchair is equipped with two front wheels, two driving wheels and two rear wheels in sequence at the front, middle and rear ends of the vehicle frame, and the left and right sides of the vehicle frame are respectively equipped with a front wheel integrally connected and formed. seat and a driving wheel seat, the front wheel seat and the driving wheel seat are respectively connected with the front wheel and the driving wheel seat, however, due to the integrally formed rigid structure of the front wheel seat and the driving wheel seat, it will cause Electric wheelchairs cannot run smoothly and steadily on bumpy roads; in order to improve the above-mentioned defects, some operators pivot the front wheel base and the driving wheel base on two positions of the vehicle frame at a specific distance, and connect the front wheel base and the driving wheel base. A linkage assembly is arranged between the driving wheel bases, so that when the electric wheelchair is driving on an uneven road, the front wheel base/driving wheel base can pivot relative to the vehicle frame, and drive the driving wheel base through the linkage assembly /The front wheel seat pivots so that the front wheel and the driving wheel can maintain contact with the road surface at the same time, so as to keep the vehicle body stable; and, the front wheel seat and the driving wheel seat are respectively provided with buffers between them and the vehicle frame Blocks and other shock-absorbing materials are used to absorb shocks to make driving more comfortable.

However, the front wheel seat and the driving wheel seat of the above-mentioned electric wheelchair must be connected by a complex linkage assembly, so that the front wheel and the drive wheel can be kept in contact with the road surface at the same time, but because the known linkage assemblies are mostly of different lengths The connecting rods are connected to each other, so the design and assembly of each component are quite complicated, the cost is also high, and the stress is easy to concentrate on the joints of these connecting rods, causing the car body to be unbearable for long-term use; moreover, due to the above The buffer blocks located between the front wheel seat/drive wheel seat and the frame are closer to the driver's seat, so these buffer blocks can only exert shock absorption ability after the shock force is transmitted to the frame near the driver's seat , so the shock-absorbing effect is limited, causing discomfort on the driving seat.

Utility model content

The purpose of this utility model is to provide a kind of electric wheelchair, so that the front wheel seat and the middle wheel seat are respectively pivotally connected to the same position of the vehicle frame, to replace the known integrally connected rigid structure of the front wheel seat and the driving wheel seat, and the front wheel seat An elastic piece is arranged between the seat and the middle wheel seat to replace the known complex linkage assembly, so as to provide buffer for the pivotal swing of the front wheel seat and the middle wheel seat relative to the frame. It has the advantages of exquisite components, easy design and production, and Low cost, easy assembly and maintenance, and durability.

In order to achieve the above object, the electric wheelchair provided by the utility model comprises:

A vehicle frame, the vehicle frame has a front end and a rear end, and its left and right sides respectively have a pivot end;

A pair of front wheel sets are located on both sides of the front end of the vehicle frame, and have a front wheel base and a front wheel respectively. The front wheel base has a first joint end and a second joint end, and the first joint end is connected to The second joint end is closer to the vehicle frame, the first joint end is pivotally connected to the pivot joint end of the vehicle frame, and the second joint end is connected to the front wheel;

A pair of middle wheel sets are located on both sides between the front and rear ends of the vehicle frame, and have a middle wheel base and a middle wheel respectively. The middle wheel base has a first connection end and a second connection end. The first connection end is closer to the front wheel set than the second connection end, the first connection end is pivotally connected to the pivot end of the vehicle frame, and the second connection end is connected to the middle wheel;

a pair of rear wheels located on either side of the rear end of the frame; and

A pair of elastic parts are respectively arranged between the front wheel base and the middle wheel base to provide cushioning for the pivotal swing of the front wheel base and the middle wheel base relative to the vehicle frame.

Said electric wheelchair, wherein the two ends of each elastic member are movably pivotally connected with the front wheel base and the middle wheel base respectively.

Said electric wheelchair, wherein the middle wheel seat includes a frame and a transmission member, the first connection end is a first hole formed in the frame, the pivot end of the frame is a pipe body, The pipe body passes through the first hole to form a pivot connection with the frame, and passes through the first coupling end to form a pivot connection with the front wheel seat; the transmission member is fixed on the frame and has A transmission shaft, which constitutes the second connecting end and is pivotally connected with the middle wheel.

The electric wheelchair, wherein the middle wheel seat is provided with a second hole between the first connection end and the second connection end, and the front wheel seat is provided between the first joint end and the second joint end A third hole is provided, and the two ends of the elastic member are respectively connected to the second hole and the third hole.

Said electric wheelchair, wherein the stand has two parallel side plates and a top plate connecting the two side plates, each of the side plates has a perforation, and the two perforations constitute the first hole of the stand, and the transmission member It is fixedly connected with at least one of the side plates, the top plate has two parallel shaft holes, and the two shaft holes constitute the second hole of the stand, and the front wheel seat has a sleeve located between the two side plates, and the sleeve A pipe constitutes the first connecting end, and the pivoting end of the vehicle frame passes through the two through holes and the bushing.

The electric wheelchair described above, wherein the front wheel seat has a wheel frame connected to the sleeve and extending toward the front of the frame, the front end of the wheel frame constitutes the second joint end and is connected to the front wheel, and the wheel frame A side frame protrudes between the first and second joint ends, and the side frame has the third hole.

In the electric wheelchair, each of the elastic members has a buffer and a compression spring, the buffer has a sleeve and a piston, one end of the sleeve is pivotally connected to the middle wheel seat, and has a contact portion, the One end of the piston is pivotally connected to the front wheel seat, and the other end extends into the sleeve and can move relative to the sleeve. The two ends of the compression spring are respectively pressed against the abutting portion of the sleeve and the piston.

The electric wheelchair, wherein the sleeve has an external threaded surface, the buffer has an adjustment piece, the adjustment piece is screwed on the external threaded surface of the sleeve and can be screwed in or out, and the adjustment piece constitutes It's time to arrive.

The electric wheelchair includes a seat group, and the vehicle frame is provided with an upright support tube between its front and rear ends, the support tube is closer to the rear wheel group than the pivot end of the vehicle frame, the The seat group is arranged on the straight pipe.

In a nutshell, the utility model provides an electric wheelchair for achieving the above purpose, comprising a vehicle frame, the vehicle frame has a front end and a rear end, and its left and right sides respectively have a pivot end; a pair of front The wheel set is located on two sides of the front end of the vehicle frame, and they respectively have a front wheel seat and a front wheel, and the front wheel seat has a first joint end and a second joint end, and the first joint end is compared with the The second joint end is close to the vehicle frame, the first joint end is pivotally connected to the pivot joint end of the vehicle frame, and the second joint end is connected to the front wheel; a pair of middle wheel sets are located at the front and rear of the vehicle frame Two sides between the two ends, and they respectively have a middle wheel base and a middle wheel, the middle wheel base has a first connecting end and a second connecting end, the first connecting end is closer to the second connecting end The front wheel set, the first connecting end is pivotally connected to the pivoting end of the vehicle frame, the second connecting end is connected to the middle wheel; a pair of rear wheel sets are located on two sides of the rear end of the vehicle frame; and a The elastic members are respectively arranged between the front wheel base and the middle wheel base to provide cushioning for the pivotal swing of the front wheel base and the middle wheel base relative to the vehicle frame.

In summary, the interlocking structure design of the front wheel set, middle wheel set and elastic parts of the present invention can replace the rigid connection structure and complex interlocking suspension of the front wheel seat and the driving wheel seat of the known electric wheelchair The structure makes the components more streamlined, and has the advantages of easy design and production, low manufacturing cost, easy assembly and maintenance, and durability.

Description of drawings

Fig. 1 is a side view of an electric wheelchair according to a preferred embodiment of the present invention.

2 is a combined perspective view of the front wheel base, the middle wheel base and the elastic member of the electric wheelchair according to the preferred embodiment of the present invention.

FIG. 3 is an exploded perspective view of FIG. 2 .

Fig. 4 is a schematic diagram of the electric wheelchair of the above-mentioned preferred embodiment when driving on a flat road.

Fig. 5 is a schematic diagram of the front wheels of the electric wheelchair of the above-mentioned preferred embodiment when driving on a raised road.

Fig. 6 is a schematic diagram of the middle wheel of the electric wheelchair of the above-mentioned preferred embodiment when driving on a raised road.

Detailed ways

Fig. 1 to Fig. 6 is the electric wheelchair 100 of a preferred embodiment of the utility model, and this electric wheelchair 100 comprises a vehicle frame 10, a pair of middle wheel set 20, a pair of front wheel set 30, a pair of rear wheel set 40 and A pair of elastic members 50, wherein:

The frame 10 has a front end 10a and a rear end 10b. The left and right sides of the bottom of the front end 10a of the frame 10 in this embodiment respectively extend outward to form a pivot end 11, which is a hollow tube. ; Also, the frame 10 is provided with an upright support tube 12 behind the pivoting end 11 for assembling a seat group 13;

Each of the middle wheel sets 20 has a middle wheel seat 21 and a middle wheel 22 connected to the middle wheel seat. In this embodiment, the middle wheel set 21 is a driving wheel set, and its structure includes a stand 23 and A transmission part 24; Please cooperate with reference to Fig. 3, wherein:

The stand 23 has two parallel side plates 231, a top plate 232 and a bottom plate 233 connecting the two side plates 231; each of the side plates 231 has a perforation 23a, and in this embodiment, the two perforations 23a are located at the A first hole at the bottom of the frame 23, the first hole constitutes the first connecting end of the middle wheel seat 21, for the pivotal connection of the pivot end 11 of the vehicle frame 10 to form a pivot connection, so that the frame 23 can be relatively The vehicle frame 10 pivots; and, the outer side plate 231 has three fixing holes 23b; the top plate 233 has two shaft holes 23c, and the two shaft holes 23c form a second hole at the top of the stand 23;

The transmission member 24 has a motor 25 and a gear box 26 assembled with each other, wherein the gear box 26 is fixed to the side plate 231 through the fixing holes 23b by a plurality of bolts (not shown), and the gear box 26 There is a second connecting end of the middle wheel seat 21 formed by a power transmission shaft 261, the power transmission shaft 261 is connected with the middle wheel 22 to drive the middle wheel 22 to rotate; the power transmission shaft 261 is positioned behind the perforation 23a to The middle wheel 22 can pivot toward the front end 10a of the vehicle frame 10 with the pivot point 11 as a fulcrum;

Each of the front wheel sets 30 has a front wheel base 31 and a front wheel 32 connected to the front wheel base 31; The tube 33 extends toward the wheel frame 34 in front of the vehicle frame 10. The front end of the wheel frame 34 constitutes the second joint end of the front wheel seat 31 and is pivotally connected with the front wheel 32. When assembling, the sleeve pipe 33 is located at the two ends Between the side plates 231, the pivotal end 11 of the vehicle frame 10 can pass through the perforations 23a of the two side plates 231 and the sleeve 33 to form a pivot connection with the front wheel seat 31, so that the front wheel set 30 It can pivot relative to the vehicle frame 10, and the middle section of the wheel frame 34 protrudes toward the inner side of the vehicle frame 10 to form a side frame 35, and the side frame 35 has a third hole 36;

Each of the rear wheel sets 40 is fixedly connected to both sides of the rear end 10b of the vehicle frame 10 in this embodiment; of course, the rear wheel sets 40 can also be connected to the vehicle frame 10 in a pivotal manner;

In this embodiment, each elastic member 50 is composed of a buffer member 51 and a compression spring 52. The buffer member 51 has a sleeve 53, a piston 54 and an adjustment member 55, wherein one end of the sleeve 53 is pivotally connected. In the second hole of the middle wheel base 21 (that is, the second shaft hole 23c of the top plate 232), and the cylinder body has an external thread surface 531; one end of the piston 54 is pivotally connected to the third hole 36 of the side frame 35 , the other end extends into the sleeve 53 and can move relative to the sleeve 531; the adjustment member 55 is screwed on the external threaded surface 531 of the sleeve 53 and can be screwed in or out to form the sleeve 53. To contact the abutting portion of the compression spring 52, the two ends of the compression spring 52 respectively abut the adjusting member 55 and the piston 54, so as to provide the front wheel base 31 and the middle wheel base 21 to pivot relative to the vehicle frame 10 buffer.

The above is the description of the components of the electric wheelchair 100 of this embodiment and their relative positions, and then describe the operation of the electric wheelchair 100:

Please refer to Fig. 5 and Fig. 6, when the scooter is running on a bumpy road, taking the protrusion 101 on the road as an example, the front wheel 32 of the scooter 100 will first contact with the protrusion 101. The body is continuously propelled by the middle wheel 22, so the front wheel base 31 of the front wheel set 30 will be lifted up with the pivotal end 11 of the vehicle frame 10 as a fulcrum, so as to drive the front wheel 32 to climb up the protrusion 101 , and at the same time pull the elastic member 50 upwards, at this time the piston 54 will extend into the sleeve 53 and squeeze the compression spring 52 to absorb the energy impacted by the protrusion 101 on the front wheel 32 and inhibit the compression spring 52 from absorbing shock Shock during the rear rebound, to slow down the impact of the rebound and keep the balance of the vehicle body, and the middle wheel seat 21 will also be linked by the elastic member 50 to have a hem potential, so that the middle wheel 22 and the front wheel 32 can Simultaneously close to the road surface, to keep the vehicle body stable, and can increase the grip of the middle wheel 22, so that the middle wheel 22 can be pushed forward smoothly; Fig. 6), the middle wheel seat 21 will be lifted up, and absorb the energy of the middle wheel 22 being impacted by the protrusion 101 through the elastic member 50 and link the front wheel set 30 to pivot downward, so that the front wheel 32 is tight Touch the road to keep the body stable and improve the comfort of the driver.

Another thing to mention is that the user can adjust the elastic force of the compression spring 52 by screwing the adjustment member 55 on the buffer member 51, so as to adapt to different drivers and driving road conditions, so that the electric wheelchair 100 still maintains the optimum performance when driving. Excellent stability.

As can be seen from the above, the utility model is formed by pivotally installing the front wheel base 31 and the middle wheel base 21 on the pivot joint end 11 of the vehicle frame 10 respectively to improve the rigid structure in which the known front wheel base and the driving wheel base are integrally connected. In the present invention, an elastic member 50 is provided between the front wheel base 31 and the middle wheel base 21 to provide cushioning for the pivotal swing of the front wheel base 31 and the middle wheel base 21 relative to the vehicle frame 10, There is no need for a complex interlocking assembly between the front wheel seat and the driving wheel seat of the known scooter; the electric wheelchair 100 of the present utility model has the advantages of exquisite components, easy design and production, low manufacturing cost, and low assembly and maintenance. Under the premise of advantages such as ease and durability, it can still run smoothly on bumpy roads, and the elastic member 50 is not in direct contact with or close to the seat group 13, so the elastic member 50 can transmit the shock force to the vehicle frame 10 Near the seat group 13, the shock force is quickly absorbed to increase the driving comfort.

Certainly, the electric wheelchair of the present utility model is not limited to middle-wheel drive, and may also be front-wheel or rear-wheel drive; It is applied between the rear wheel set and the middle wheel set, and the elastic member can also use other forms of springs. Taking the torsion spring as an example, one end of the torsion spring can be connected to the front wheel seat, and the other end can be connected to the front wheel seat. Resisting to the middle wheel seat, not only can the torsion spring absorb the impact force and link the front wheel seat and the middle wheel seat, but also the components will be more simplified in composition.

The above descriptions are only preferred feasible embodiments of the present utility model, and all equivalent structural changes made by applying the description of the utility model and the scope of the claims should be included in the scope of the claims of the utility model.

Claims (9)

1. an electric wheelchair is characterized in that, comprises:

One vehicle frame, this vehicle frame have a front end and a rear end, and two sides have a pivot end respectively about it;

Wheels before a pair of, be positioned at this vehicle frame front end two sides, and a wheel seat and a front-wheel before it has one respectively, should have one first binding end and one second binding end by preceding wheel seat, this first binding end is compared this second binding end near this vehicle frame, the pivot end of this first binding end and this vehicle frame articulates, and this second binding end and this front-wheel connect to be established;

One centering wheels, two sides between this vehicle frame front and back ends, and it has respectively in one takes turns in the wheel seat and, should have one first link and one second link by middle wheel seat, this first link is compared this second link near wheels before being somebody's turn to do, the pivot end of this first link and this vehicle frame articulates, this second link with should in wheel connect and establish;

The pair of rear wheels group is positioned at this vehicle frame rear end two sides; And

Pair of resilient members, it is located at this preceding wheel seat respectively and is somebody's turn to do between the middle wheel seat, is this preceding wheel seat and the buffering of being somebody's turn to do relative this vehicle frame pivot pendulum of middle wheel seat.

2. electric wheelchair as claimed in claim 1 is characterized in that, wherein respectively two ends of this elastic component reach and should middle wheel seat activity articulate with this preceding wheel seat respectively.

3. electric wheelchair as claimed in claim 1, it is characterized in that, wherein should comprise a stand and a driving member by middle wheel seat, this first link is the one first hole portion that is formed at this stand, the pivot end of this vehicle frame is a body, this body passes this first hole portion and forms with this stand and to articulate, and passes this first binding end and form with this preceding wheel seat and to articulate; This driving member is fixed on this stand, and has a power transmission shaft, this power transmission shaft constitute this second link and with this in take turns and be coupling.

4. electric wheelchair as claimed in claim 3, it is characterized in that, wherein should between this first link and this second link, be provided with one second hole portion by middle wheel seat, should be provided with one the 3rd hole portion by preceding wheel seat between this first binding end and this second binding end, two ends of this elastic component are arranged in this second hole portion and the 3rd hole portion respectively.

5. electric wheelchair as claimed in claim 4, it is characterized in that, wherein this stand has two parallel side plates and a top board that is connected this two side plate, respectively this side plate has a perforation, this two perforation constitutes the first hole portion of this stand, this driving member and at least one this side plate are affixed, this top board has two parallel axis holes, this two axis hole constitutes the second hole portion of this stand, should have a sleeve pipe between this two side plate by preceding wheel seat, this sleeve pipe constitutes this first binding end, and the pivot end of this vehicle frame passes this two perforation and this sleeve pipe.

6. electric wheelchair as claimed in claim 5, it is characterized in that, wherein should have wheel carrier telescopic joint and that extend towards this vehicle frame the place ahead by preceding wheel seat with this, this wheel carrier front end constitutes this second binding end and connects with this front-wheel to be established, and this wheel carrier is outstanding between this first, second binding end to be formed with a bogie side frame, and this bogie side frame has the 3rd hole portion.

7. electric wheelchair as claimed in claim 2, it is characterized in that, wherein respectively this elastic component has a bolster and a compression spring, this bolster has a sleeve and a piston, this sleeve one end is articulated in wheel seat in this, and has one to portion, and this piston one end is articulated in this preceding wheel seat, end stretches into this sleeve and can move relative to this sleeve in addition, and two ends of this compression spring are this telescopic portion and this piston of supporting of contact respectively.

8. electric wheelchair as claimed in claim 7 is characterized in that, wherein this sleeve has an external screw thread face, and this bolster has an adjustment part, and spiral shell advances or spiral shell moves back but this adjustment part spiral shell is located on this telescopic external screw thread face, and this adjustment part constitutes the portion that should support.

9. electric wheelchair as claimed in claim 1 is characterized in that, comprises a seat group, and this vehicle frame is provided with an axial stay pipe between its front and back ends, and this stay pipe is compared the pivot end of this vehicle frame near these back wheels, and this seat is mounted on this straight tube.

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