CN110507519A - A four-wheel walking aid device with automatic wheel column conversion - Google Patents

Abstract

The invention discloses a four-wheel walking aid device with automatic conversion of wheel posts, which comprises a walker frame body. The walker frame body is mainly composed of a front bracket and a rear bracket. There are front universal wheels, and a seat is installed on the middle part of the walker frame. The seat is rotatably connected with the walker frame to form a rotating seat structure. The upper end of the wheel frame is rotationally connected with the walker frame; the connection point between the upper end of the wheel frame and the walker frame is the center of rotation of the wheel frame, and the distance between the center of rotation of the wheel frame and the lower end of the walker frame The distance is smaller than the radius of gyration between the traveling wheels and the center of rotation of the wheel frame; a linkage mechanism is provided between the center of rotation of the seat and the center of rotation of the wheel frame. The invention enables the seat to be linked with the walking wheels, which improves the safety and reliability of use. At the same time, the linked setting of the seat and the walking wheels will not affect the arrangement of the handbrake device, which is convenient for speed control during walking.

Description

A four-wheel walking aid device with automatic wheel column conversion

technical field

The invention belongs to the technical field of walking aids, and in particular relates to a four-wheel walking aid with automatic conversion of wheel columns.

Background technique

The structure of a common four-wheel walker comprises a handbrake, a seat cushion, a braking point, a rear wheel and a front universal wheel, etc., as shown in the utility model patent disclosure of the notification number CN2496446Y. At ordinary times, the elderly can push the walker to assist in walking. When braking is required in an emergency, the handbrake can be pressed, and the force is transmitted to the braking point to brake the rear wheels. When you need to sit down and have a rest, you need to pull down the handbrake, so that the rear wheels are in the braking state for a long time, so as to ensure the stability of the walker when sitting down and prevent falling.

This kind of four-wheel walker requires the elderly to manually lock the wheels to prevent the wheels from slipping, and the memory of the elderly is generally poor. When the elderly want to sit down and rest, they tend to forget to pull down the handbrake, and the wheels are still in the driving state. When the elderly sit on it The rear walker is very easy to slide backwards and fall down, and the consequences are disastrous.

The prior art also discloses other brake forms for four-wheel walkers.

For example, the utility model patent with the notification number CN202724206U discloses a walking aid, including a vehicle frame, a walking wheel, a support handle and a manual brake mechanism. The vehicle frame includes a pair of front support rods and a pair of rear support rods. The middle parts of the two rear support rods are fixedly connected by the front cross bar, and the middle parts of the two rear support rods are fixedly connected by the rear cross bar. Seat plates are arranged on the front cross bar and the rear cross bar. It is characterized in that the lower end of the front support rod or the rear The lower end of the support rod is provided with a self-weight brake mechanism, and a foot is formed at the bottom of the front support rod or the rear support rod. When the vehicle is manned, the self-weight brake mechanism drives the foot to the ground to form an automatic brake. Compared with the prior art, the present invention has the advantages that the overall structure of the walker is relatively simple, and the braking is performed by using the weight of the human body, which can ensure the safety and reliability of the walker's braking under the manned state.

For example, the utility model patent with the notification number CN201798883U discloses a walking aid with safety braking performance, including a wheelchair, which is composed of a chair frame and a walking wheel mechanism connected to the supporting legs of the chair frame. A lifting spring is arranged between the roller shafts in the walking wheel mechanism, one end of the lifting spring acts on the supporting leg, and the other end acts on the roller shaft, so that an elastic connection is formed between the supporting leg and the roller shaft, and the roller shaft and the roller are connected. Connection; a foot for braking is extended from the support leg to the ground. When the wheelchair is unloaded, the roller touches the ground, and the lifting spring lifts the foot through the support leg, and is suspended relative to the ground. When the wheelchair is fully loaded In the state, the foot touches the ground to form a self-weight braking mechanism. When practicing walking, the spring lifts the wheelchair frame, and the feet are suspended on the ground. When resting and riding, the body's own weight is used to make the feet touch the ground to form an automatic brake. This scheme overcomes the deficiency of the brake design of the existing similar walker, and guarantees the safety of the walker brake to the greatest extent.

For example, the invention patent with the notification number CN102247262B discloses an automatic brake device for a walker in the technical field of walkers, including: an infrared sensor circuit, a triode switch circuit, a power supply and two electromagnetic brakes. The present invention can sense the distance between the user of the walking aid and the walking aid through an infrared sensor, and when the distance is within a certain range, it is normal assisted walking, and the braking device is not triggered. When the distance exceeds a certain range, it is judged to be abnormal use at this time, and the user is no longer near the walker, and the automatic braking device is triggered immediately to make the walker brake locked to prevent accidents.

The technical schemes of the above-mentioned announcement numbers CN202724206U and CN201798883U adopt self-weight brakes, and the technical scheme of announcement number CN102247262B adopts infrared induction brakes, which can improve a certain degree of safety and reliability compared with hand brakes, but there will still be slipping defects during use: if Self-weight brakes are in the non-braking state when the user is not riding, and the user may slip the walker during the sitting process, and it is difficult to determine the self-weight parameters for determining the brake; for example, infrared induction brakes are easily misunderstood by debris. trigger, cannot effectively perceive the distance between the walker user and the walker, and cannot accurately judge normal or abnormal use.

Contents of the invention

The object of the present invention is to provide a four-wheel walking aid device with automatic wheel column conversion.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A four-wheel walking aid device with automatic wheel column conversion, including a walker frame body, the walker frame body is mainly composed of a front bracket and a rear bracket, the rear bracket is equipped with walking wheels, and the front bracket is equipped with a front universal The upper part of the walker frame is equipped with a handle extending backward, and the middle part of the walker frame is also equipped with a seat, and the seat is rotatably connected with the walker frame to form a rotating seat structure , the rotation connection between the seat and the walker frame is the seat rotation center, and the seat rotation makes it have two states: stowed and unfolded;

The walking wheels include a wheel frame and a wheel body installed at the lower end of the wheel frame, and the upper end of the wheel frame is rotationally connected with the walker frame body; the connection point between the upper end of the wheel frame and the walker frame body is the wheel frame rotation center, And the distance from the center of rotation of the wheel frame to the lower end of the frame of the walker is less than the radius of gyration of the walking wheels to the center of rotation of the wheel frame;

The wheel body of the walking wheel is also provided with a braking mechanism, the braking mechanism is connected with the handbrake arranged at the handle through a flexible brake line, the wheel frame of the walking wheel is provided with a wire manager, and the flexible brake line passes through the wire manager ;

There is a linkage mechanism between the seat rotation center and the wheel frame rotation center. The linkage mechanism includes a driving wheel set at the seat rotation center and a driven wheel set at the wheel frame rotation center. The seat is fixedly connected with the driving wheel. The frame is fixedly connected to the driven wheel, and the driving wheel and the driven wheel are connected through a transmission mechanism;

When the seat rotates from the stowed state to the unfolded state, the seat rotates and drives the driving wheel at the seat rotation center to rotate forward, and the rotation of the driving wheel is transmitted to the driven wheel at the rotation center of the wheel frame through the transmission mechanism, and the driven wheel Drive the wheel frame to rotate in the forward direction, so that the wheel body is separated from the working surface, and the lower end of the extension section of the rear bracket is in contact with the working surface;

When the seat rotates and resets from the unfolded state to the stowed state, the seat rotates and drives the driving wheel at the seat rotation center to rotate in the opposite direction. The rotation of the driving wheel is transmitted to the driven wheel at the wheel frame rotation center through the transmission mechanism. The rotation drives the wheel frame to rotate in reverse, so that the wheel body is in contact with the working surface.

The rear support is composed of a horizontal section protruding backward and an extension section connected to the rear end of the horizontal section and extending downward, and the traveling wheels are installed at the extension section.

The transmission mechanism includes a double gear set at the junction of the horizontal section of the rear bracket and the extension section. The double gear is a double gear composed of two transmission sprockets, one of which is connected to the drive wheel through a chain ring. , where the other transmission sprocket is connected with the driven wheel through a chain link transmission.

The rear bracket is a hollow cavity structure, and the linkage mechanism is arranged in the hollow cavity.

A seat limiter is installed at the horizontal section of the rear bracket, and when the seat rotates from a stowed state to an unfolded state, the seat limiter abuts and cooperates with the seat to support the seat.

When the seat rotation is in the unfolded state, the seat is in a horizontal position.

A seat locking part is installed on the front bracket, and when the seat is in a stowed state, the seat locking part realizes position locking of the seat.

The seat locking part includes a spring pin installed on the front bracket, and a positioning pin hole is arranged on the seat corresponding to the spring pin.

The center of rotation of the seat is located at the junction of the rear support and the front support.

The rear bracket and the front bracket are also provided with a cable manager at the passing path of the flexible brake line, and the flexible brake line passes through the cable manager in sequence.

Beneficial effects of the present invention:

The invention makes the seat and the walking wheels linked, when the seat is rotated from the stowed state to the unfolded state, the rotation of the seat drives the wheel frame to rotate forward, so that the wheel body is separated from the working surface, and the lower end of the extension section of the rear bracket contacts the working surface. Complete the operation of the wheel turning column to realize the parking of the walker. At this time, the walker is more stable, which is convenient for the user to sit down and is not easy to fall down; when the seat rotates and resets from the unfolded state to the stowed state, the seat rotates to drive the wheel frame Reverse rotation makes the wheel body contact with the working surface, completes the operation of the column wheel, and the four wheels touch the ground, which is convenient for assisting walking, thus ensuring that the user must put down the seat if he wants to sit on the walker for a rest, and putting down the seat will help The walker must be in a stable state of parking, which improves the safety and reliability of use, and reduces the chance of slipping due to forgetting to lock the wheels; at the same time, the linkage setting of the seat and the walking wheels will not affect the arrangement of the handbrake device, which is convenient Speed control while walking.

Description of drawings

Accompanying drawing 1 is the structural representation of the seat in the embodiment of the present invention in the stowed state;

Accompanying drawing 2 is the enlarged schematic diagram of linkage mechanism in Fig. 1;

Accompanying drawing 3 is the structure schematic diagram of the embodiment seat of the present invention in unfolded state;

Accompanying drawing 4 is the enlarged schematic view of the linkage mechanism in Fig. 3 .

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

As shown in Fig. 1 to Fig. 4, a kind of four-wheel walk-aid device with wheel column automatic conversion of the present embodiment includes a walker frame body, and the walker frame body is mainly composed of a front bracket 1 and a rear bracket 2, and the rear bracket Walking wheels 4 are installed at 2 places of the support, front universal wheels 5 are installed at 1 place of the front support, and a seat 3 is also installed on the walker frame body 1 .

The seat 3 is rotatably connected with the walker frame 1 to form a rotating seat structure. The rotating connection between the seat 3 and the walker frame is the center of rotation of the seat. state. In this embodiment, the center of rotation of the seat is located at the junction of the rear bracket 2 and the front bracket 1 .

The walker frame is also provided with a seat limiter 9. When the seat rotates from the stowed state to the unfolded state, the seat limiter 9 abuts and cooperates with the seat 3 to support the seat. In this embodiment, the seat limiter is installed at the horizontal section of the rear bracket 2 described below. When the seat 3 is rotated and in the expanded state, the seat 3 is in a horizontal position.

A seat locking part is installed on the front bracket 1, and when the seat 3 is in a retracted state, the seat locking part realizes the position locking of the seat; the seat locking part includes a spring pin 11 installed on the front bracket 1, the seat The position corresponding to the spring pin 11 on the chair 3 is provided with a positioning pin hole, which ensures that the position of the seat is fixed when it is packed up, and prevents it from rotating and affecting the walking wheel 4 during walking.

Back support 2 is made up of the horizontal section that protrudes backward and the extension section that is connected at the rear end of horizontal section and extends downwards, and road wheel 4 is installed at the extension section place; The wheel body 42 of the part, the upper end of the wheel frame 41 is rotationally connected with the extension of the rear bracket 2; The distance of the lower end is less than the radius of gyration of the road wheel 4 taking the center of rotation of the wheel frame as the center of circle.

A handle 10 extending backwards is installed on the upper end of the walker frame, which is convenient for holding when walking. The wheel body place of road wheel 4 is also provided with brake mechanism 43, and the brake mechanism of the present embodiment selects V brake for use. The brake mechanism 43 is connected with the handbrake 12 arranged at the handle 10 through a flexible brake line, and the wheel frame 41 of the road wheel 4, the rear support 2 and the front support 1 are respectively provided with a handle at the passing path of the flexible brake line 14. Wire organizer 13, flexible brake line passes through wire organizer 13 successively. The coordinated setting of the hand brake and the brake mechanism is convenient for speed control when walking.

There is also a linkage mechanism between the seat rotation center and the wheel frame rotation center, the rear bracket 2 is a hollow cavity structure, and the linkage mechanism is arranged in the hollow cavity.

The linkage mechanism includes a driving wheel 6 arranged at the center of rotation of the seat, a driven wheel 8 arranged at the center of rotation of the wheel frame, and a relay sprocket 7 arranged at the junction of the horizontal section and the extension section, the seat 3 and the driving wheel The wheel 6 is fixedly connected, and the wheel frame 41 is fixedly connected with the driven wheel 8 . In this embodiment, the relay sprocket 7 is a duplex gear composed of two transmission sprockets, one of which is connected to the driving wheel 6 through a chain link, and the other transmission sprocket is connected to the driven wheel 8 through a chain. Ring drive connection.

The working principle of the present invention is as follows:

When the walker is parked, the seat 3 rotates from the stowed state to the unfolded state. The seat 3 rotates and drives the driving wheel 6 located at the seat rotation center to rotate forward. The rotation of the driving wheel 6 is transmitted to the The driven wheel 8 at the rotation center of the wheel frame rotates, and the rotation of the driven wheel 8 drives the wheel frame 41 to rotate forward, so that the wheel body 42 is separated from the working surface, and the lower end of the extension section of the rear support 2 contacts the working surface to complete the operation of the wheel rotation column and realize walking aid When the walker is parked, the walker is more stable at this time, which is convenient for the user to sit down and is not easy to fall.

After the walker is parked, it walks again. When the seat 3 is rotated from the unfolded state to the stowed state, the seat 3 rotates and drives the driving wheel 6 located at the seat rotation center to rotate in the opposite direction. The driving wheel 6 rotates through the relay The sprocket 7 is transmitted to the driven wheel 8 positioned at the center of rotation of the wheel frame to rotate, and the driven wheel 8 rotates to drive the wheel frame 41 to rotate in reverse, so that the wheel body 42 contacts the working surface, completes the column runner operation, and facilitates auxiliary walking. When walking, the speed is controlled by the handbrake.

The invention makes the seat and the walking wheel linked, and the rotation of the seat drives the wheel frame to rotate in the forward or reverse direction, so as to realize the operation of the wheel turning column or the column turning wheel, thus ensuring that the user must put down the seat if he wants to rest on the walking aid When the seat is put down, the walker must be in a stable state of parking, which improves the safety and reliability of use and reduces the chance of slipping due to forgetting to lock the wheels. At the same time, the linkage setting of the seat and the walking wheels will not affect the arrangement of the handbrake device, which is convenient for speed control when walking.

The design of the present invention is more friendly to the elderly. The elderly must put down the seat if they want to sit on the walker for a rest. This solution greatly reduces the possibility of the elderly slipping and falling due to forgetting to lock the wheels.

The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced without departing from it. Any modifications or partial replacements within the spirit and scope of the present invention shall fall within the scope of the claims of the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "front", "rear", "left", "right", "upper" and "lower" are based on those shown in the accompanying drawings. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as protecting the content of the present invention. limits.

Claims (10)

1. a kind of wheel post auto-converting type four-wheel walking aid device, including walk helper frame body, walk helper frame body mainly by fore-stock and After-poppet forms, and traveling wheel is equipped at after-poppet, preceding universal wheel is equipped at fore-stock, is equipped at the top of walk helper frame body The handle to extend back is also equipped with seat on the middle part of walk helper frame body, it is characterised in that: the seat and walk helper frame body Rotation connection forms rotary seat structure, and rotating junction with walk helper frame body on seat is seat rotation center, seat rotation Turn to make it have to pack up and be unfolded two states；

The traveling wheel includes wheel carrier and the wheel body for being mounted on wheel carrier lower end, and wheel carrier upper end and the rotation of walk helper frame body connect It connects；The tie point of wheel carrier upper end and walk helper frame body is wheel carrier rotation center, and under wheel carrier rotation center to walk helper frame body The distance at end is less than traveling wheel with the radius of gyration of wheel carrier rotation center；

Braking mechanism is additionally provided at the wheel body of the traveling wheel, braking mechanism passes through flexible brake cable and is arranged at the handle Parking brake connection, line winder is equipped at the wheel carrier of traveling wheel, flexible brake cable is passed through by line winder；

Linkage mechanism is equipped between seat rotation center and wheel carrier rotation center, linkage mechanism, which is included at seat rotation center, to be set The driving wheel set, the driven wheel being arranged at wheel carrier rotation center, seat are fixedly connected with driving wheel, and wheel carrier is fixed with driven wheel Connection is sequentially connected between driving wheel and driven wheel by transmission mechanism；

When seat is rotated by collapsed state to unfolded state, seat rotation simultaneously drives the driving wheel for being located at seat rotation center positive Rotation, driving wheel rotation are transferred to the driven wheel rotation positioned at wheel carrier rotation center, driven wheel rotation band driving wheel through transmission mechanism Frame rotates forward, and makes wheel body separating operation face, the extended segment lower end of after-poppet and operation face contact；

When seat is by unfolded state spinning reduction to collapsed state, seat rotation simultaneously drives the driving wheel for being located at seat rotation center It rotates backward, driving wheel rotation is transferred to the driven wheel rotation positioned at wheel carrier rotation center through transmission mechanism, and driven wheel rotates band Driving wheel frame rotates backward, and makes wheel body and operation face contact.

2. a kind of wheel post auto-converting type four-wheel walking aid device according to claim 1, it is characterised in that: the after-poppet By the horizontal segment that stretches out backward and it is connected to horizontal segment rear end and the extended segment extended downwardly forms, traveling wheel is mounted on extended segment Place.

3. a kind of wheel post auto-converting type four-wheel walking aid device according to claim 2, it is characterised in that: the driver Structure includes the duplicate gear being arranged in the junction of after-poppet horizontal segment and extended segment, and duplicate gear is made of two transmitting sprocket wheels Duplicate gear, one of transmitting sprocket wheel and driving wheel be sequentially connected by chain link, another one transmitting sprocket wheel with it is driven Wheel is sequentially connected by chain link.

4. a kind of wheel post auto-converting type four-wheel walking aid device according to claim 3, it is characterised in that: the after-poppet For cavity structure, linkage mechanism is set in hollow cavity.

5. a kind of wheel post auto-converting type four-wheel walking aid device according to claim 2, it is characterised in that: the after-poppet Horizontal segment at seat limiting section is installed, when seat is rotated by collapsed state to unfolded state, seat limiting section and seat It contacts, realizes the support to seat.

6. a kind of wheel post auto-converting type four-wheel walking aid device according to claim 5, it is characterised in that: the seat rotation When turning in unfolded state, seat is in a horizontal position.

7. a kind of wheel post auto-converting type four-wheel walking aid device according to claim 1, it is characterised in that: the fore-stock On seat sticking department is installed, when seat is in collapsed state, seat sticking department, which is realized, locks the position of seat.

8. a kind of wheel post auto-converting type four-wheel walking aid device according to claim 7, it is characterised in that: the seat lock Determining portion includes the spring catch being mounted on fore-stock, is equipped with dowel hole with spring catch corresponding position on seat.

9. a kind of wheel post auto-converting type four-wheel walking aid device according to claim 1, it is characterised in that: the seat rotation Turn the junction that center is located at after-poppet and fore-stock.

10. a kind of wheel post auto-converting type four-wheel walking aid device according to claim 1, it is characterised in that: branch after described In flexible brake cable by also being provided with being equipped with line winder at path on frame and fore-stock, flexible brake cable is successively worn by line winder It crosses.