WO2020042249A1

WO2020042249A1 - Wheelchair frame

Info

Publication number: WO2020042249A1
Application number: PCT/CN2018/106538
Authority: WO
Inventors: 张钊
Original assignee: 东莞威信运动用品有限公司
Priority date: 2018-08-31
Filing date: 2018-09-19
Publication date: 2020-03-05
Also published as: CN108926440A

Abstract

A wheelchair frame (100), comprising a wheelchair body (1), a first support arm (2), a driving wheel (4), a first auxiliary wheel (5), and a second auxiliary wheel (6), wherein the middle of the first support arm (2) is pivoted to one end of the wheelchair body (1) via a first support shaft (2a), the first auxiliary wheel (5) is pivoted to one end of the first support arm (2), the second auxiliary wheel (6) is arranged at the other end of the wheelchair body (1), and the driving wheel (4) is pivoted to the other end of the first support arm (2) and is positioned between the first auxiliary wheel (5) and the second auxiliary wheel (6). With the wheelchair frame, each wheel can be in effective contact with the ground on an uneven road, thus guaranteeing normal travel.

Description

Wheelchair frame

Technical field

The present application relates to a vehicle frame, and more particularly to a wheelchair frame that can maintain effective contact between each wheel and the ground on uneven road surfaces and ensure normal driving.

Background technique

Existing wheelchairs generally have a large wheel, and in order to ensure the balance of the wheelchair, auxiliary small wheels are added to the front and back sides of the large wheel. The large wheel is usually directly mounted on the frame of the wheelchair and fixed by Motor driven on the frame. The small wheel is usually pivoted to the support arm, the support arm is pivoted to the frame, and the suspension is carried out by shock absorbers, while the small wheel and the support arm support the frame to prevent the frame from being lost. balance. Although the existing wheelchairs have better adaptability on flat roads, they may not be able to move forward on uneven roads. This is because the front and rear small wheels are supported by independent arms and shock absorbers. When the large wheels pass through the low-lying ground and the front and rear small wheels are on higher ground, the two small wheels may The wheelchair wheel is directly supported, and the large wheel is erected and cannot contact the low-lying ground, and the entire frame is driven by the motor to output power to the large wheel. Therefore, the motor at this time The driving force cannot be converted into the driving force, so that the wheelchair frame cannot be advanced.

Application content

The object of the present application is to provide a wheelchair frame that can maintain effective contact between each wheel and the ground on uneven road surfaces and ensure normal driving.

In order to achieve the above object, the wheelchair frame provided in this application includes a vehicle body, a first support arm, a driving wheel, a first auxiliary wheel, and a second auxiliary wheel, and a middle portion of the first support arm is pivotally connected to the first support shaft. One end of the vehicle body, the first auxiliary wheel is pivotally connected to one end of the first support arm, the second auxiliary wheel is provided at the other end of the vehicle body, and the driving wheel is pivotally connected to the The other end of the first arm is located between the first auxiliary wheel and the second auxiliary wheel.

Compared with the prior art, the present application provides a first support arm, which is pivotally connected to the vehicle body through a first support shaft, and separates the driving wheel and the first auxiliary wheel respectively. The two support points are arranged at both ends of the first support arm, and since the first support shaft and the pivot shaft of the second auxiliary wheel and the vehicle body are pivoted, the support can be effectively supported. The vehicle body is kept balanced, and because the first support arm can swing along the first support shaft, the height of the driving wheel and the first auxiliary wheel can be automatically adjusted by swinging. Therefore, when When encountering uphill, downhill, and uneven uneven roads, the first support arm can adjust the height of the driving wheel and the first auxiliary wheel in time, so as to automatically adapt to the situation of the road surface, avoiding the traditional vehicles encountering When the road is inclined, the middle driving wheel is lifted by the front and rear auxiliary wheels and cannot land, resulting in the situation that the car cannot move forward. This application automatically adjusts the swing of the first arm to ensure that the driving wheel can be used at any time. Effective contact with the ground to ensure wheels The frame can be normal driving.

Preferably, the wheelchair frame further includes a second arm, the second arm is disposed between the vehicle body and the second auxiliary wheel, and one end of the second arm is supported by a second A shaft is pivotally connected to the vehicle body, and the other end is pivotally connected to the second auxiliary wheel. By providing the second support arm, the second auxiliary wheel can also achieve swing, thereby achieving the purpose of automatic adjustment.

Specifically, a shock absorber is provided between the second arm and the vehicle body. The shock absorber can damp the second support arm, avoid the vibration being directly transmitted to the vehicle body, and is beneficial to keeping the second auxiliary wheel in contact with the ground.

Specifically, a shock absorber is provided between the first arm and the second arm. The shock absorber can dampen the first arm and the second arm to prevent vibration from being directly transmitted to the vehicle body and is beneficial to keeping the first auxiliary wheel and the second auxiliary wheel in contact with the ground.

Specifically, the first supporting arm is provided with a first abutting portion, and the second supporting arm is provided with a second abutting portion which can abut against each other. The first abutting portion and the second abutting portion may be mutually restricted, thereby preventing the first arm and the second arm from swinging excessively.

Preferably, a shock absorber is provided between the first arm and the vehicle body. The shock absorber can damp the first arm to prevent vibration from being directly transmitted to the vehicle body and improve comfort.

Preferably, the first support arm includes a first support rod and a second support rod, the first support rod and the second support rod are pivotally connected to each other through the first support shaft, and the first support rod A shock absorber is provided between the support rod and the second support rod.

Preferably, the wheelchair frame further comprises a driving device, which is arranged on the first arm and drives the driving wheel to rotate.

Specifically, the first support shaft and the second support shaft are disposed in parallel.

Specifically, the horizontal height of the first support shaft is greater than the horizontal height of the second support shaft.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective structural view of a first embodiment of a wheelchair frame of the present application.

FIG. 2 is a side view of a first embodiment of a wheelchair frame of the present application.

FIG. 3 is an exploded view of the first embodiment of the wheelchair frame of the present application.

FIG. 4 is a structural diagram of a wheelchair frame according to the first embodiment of the present application when going uphill.

5 is a perspective structural view of a second embodiment of a wheelchair frame of the present application.

6 is a side view of a second embodiment of a wheelchair frame according to the present application.

FIG. 7 is an exploded view of the second embodiment of the wheelchair frame of the present application.

FIG. 8 is a structural diagram of a wheelchair frame according to the second embodiment of the present application when going uphill.

FIG. 9 is a structural diagram of a wheelchair frame according to the second embodiment of the present application when it is downhill.

FIG. 10 is a perspective structural view of a third embodiment of a wheelchair frame of the present application.

FIG. 11 is a state diagram when the third embodiment of the wheelchair frame of the present application is going uphill.

detailed description

In order to explain the technical content, structural features, and effects achieved by this application in detail, the following detailed description is made in combination with the embodiments and the accompanying drawings.

As shown in FIG. 1 to FIG. 4, a wheelchair frame 100 according to Embodiment 1 of the present application is developed in the figure and includes a vehicle body 1, a first support arm 2, a second support arm 3, a driving wheel 4, and a first auxiliary wheel. 5 and the second auxiliary wheel 6, the first arm 2, the second arm 3, the driving wheel 4, the first auxiliary wheel 5 and the second auxiliary wheel 6 are all distributed on both sides of the vehicle body 1, so A middle portion of the first support arm 2 is pivotally connected to one end of the vehicle body 1 through a first support shaft 2 a, and the first auxiliary wheel 5 is pivotally connected to one end of the first support arm 2. The driving wheel 4 is pivotally connected to the other end of the first support arm 2 and is located between the first auxiliary wheel 5 and the second auxiliary wheel 6. The second support arm 3 is disposed between the vehicle body 1 and the second auxiliary wheel 6. Specifically, one end of the second support arm 3 extends from a pivoting portion, and the pivoting portion passes the first Two support shafts 3 a are pivotally connected to the vehicle body 1, and the other ends thereof are pivotally connected to the second auxiliary wheels 6. The second support arm 3 can also enable the second auxiliary wheel 6 to swing, thereby achieving the purpose of automatic adjustment. The first support shaft 2a and the second support shaft 3a are arranged in parallel, and the horizontal height of the first support shaft 2a is greater than the horizontal height of the second support shaft 3a. The pivoting centers of the first auxiliary wheel 5 and the second auxiliary wheel 6 are both vertically upward.

As shown in FIG. 2 and FIG. 3, a shock absorber 7 is provided between the first arm 2 and the second arm 3. The suspension 7 is a suspension spring. The first support arm 2 is generally L-shaped, and one end of the shock absorber is pivotally connected to the lower end of the L-shaped short side of the first support arm 2. The horizontal height of the pivotal axis of the two is smaller than that of the first support arm 2. The horizontal height of a support shaft 2a; the other end of the shock absorber is pivotally connected to the second support arm 3, and the horizontal height of the pivot shaft of the two is greater than the horizontal height of the second support shaft 3a so that The shock absorber 7 is inclined; the arrangement can make the force applied to the shock absorber 7 along the shock absorber when the first arm 2 and the second arm 3 swing. 7 in the direction of the central axis. The shock absorber 7 can damp the first support arm 2 and the second support arm 3 to prevent vibration from being directly transmitted to the vehicle body 1 and is beneficial to holding the first auxiliary wheel 5 and the second auxiliary wheel 6 Contact with the ground.

The first supporting arm 2 is provided with a first abutting portion 2b, and the second supporting arm 3 is provided with a second abutting portion 3b that can abut against the first abutting portion 2b. The first abutting portion 2b and the second abutting portion 3b can be mutually restricted, thereby preventing the first arm 2 and the second arm 3 from swinging excessively.

The first support arm 2 includes a first support rod 21 and a second support rod 22. The first support rod 21 and the second support rod 22 are fixedly connected to form a whole. The first support shaft 2a and the first auxiliary wheel 5 are disposed on the first support rod 21, the driving wheel 4 is disposed on the second support rod 22, and the first auxiliary wheel 5 is disposed on Said on the first support rod 21.

The wheelchair frame 100 further includes a driving device 8 including a motor and a speed reducer. The driving device 8 is disposed on the first arm 2 and drives the driving wheel 4 to rotate.

Based on the above, please refer to FIG. 4. The working principle of the wheelchair frame 100 of the first embodiment is described in detail below.

When the wheelchair frame 100 is walking on a flat road, the gravity of the vehicle body 1 is applied to the first support shaft 2a and the second support shaft 3a. At this time, the first auxiliary wheel 5 provides a For an upward supporting force, the driving wheel 4 provides an upward supporting force, and both of them simultaneously support the gravity of the first supporting shaft 2a. The second auxiliary wheel 6 provides an upward supporting force, the shock absorber 7 provides a one-way component force to support the second arm 3, and both support the gravity of the second support shaft 3a. Therefore, the weight of the entire vehicle body 1 can be smoothly supported.

When the wheelchair frame 100 is walking on an uneven road surface, such as when going uphill, the second auxiliary wheel 6 is subjected to the thrust of the slope, and the second arm 3 generates a moment to cause it to move along the first The two support shafts 3a rotate upward and compress the shock absorber 7, which simultaneously pushes against the second support arm 3 to balance this moment, so that the second auxiliary wheel 6 is always kept in contact with the The slope is in conflict. When the driving wheel 4 goes uphill, the first auxiliary wheel 5 receives a thrust force from the slope, and the first support arm 2 generates a moment that rotates upward along the first support shaft 2a. Therefore, The first auxiliary wheel 5 at the other end of the first support arm 2 has a tendency to rotate downward and always keeps in contact with the slope surface. At the same time, when the first auxiliary wheel 5 first goes uphill, under the action of the first support arm 2, the driving wheel 4 has a tendency to rotate downward and always keeps in contact with the slope surface. Therefore, by adjusting the rotation of the first arm 2, the driving wheel 4 can always be kept in contact with the ground, thereby ensuring efficient driving.

Compared with the prior art, by providing a first support arm 2, the first support arm 2 is pivotally connected to the vehicle body 1 through a first support shaft 2 a, and the driving wheels 4 and The first auxiliary wheels 5 are respectively disposed at both ends of the first support arm 2, because the first support shaft 2a and the second auxiliary wheel 6 are pivotally connected to the vehicle body 1 to form two pivot shafts. Support points, so that the vehicle body 1 can be effectively supported to maintain balance; and because the first support arm 2 can swing along the first support shaft 2a, the driving wheel 4 and the first The height of an auxiliary wheel 5 can be adjusted automatically by swinging. Therefore, when encountering uphill, downhill and uneven uneven roads, the first arm 2 can adjust the driving wheel 4 and the first auxiliary in time. The height of the wheel 5 automatically adapts to the situation of the road surface, and avoids the situation that the traditional driving wheel 4 is lifted by the front and rear auxiliary wheels and cannot land when a traditional car encounters an inclined road, which causes the car to be unable to move forward. The swing of one arm 2 is automatically adjusted to ensure that the driving wheel 4 can be connected to the ground at any time. Contacting efficiency, can ensure that the wheelchair frame 100 normal driving.

As shown in FIG. 5 to FIG. 9, the wheelchair frame 200 of the second embodiment of the present application is developed in the figure. The wheelchair frame of this embodiment is basically the same as the first embodiment, except that the first support is different. The structure of the arm 2 ', the first arm 2' of this embodiment includes a first arm 21 ', a second arm 22', and a shock absorber 23 ', and the first arm 2' passes through the A first support shaft 2a 'is pivotally connected to the vehicle body 1. The first support rod 21' and the second support rod 22 'are pivotally connected to each other. The pivot shaft is the same as the first support shaft 21'. Shaft, and the shock absorber 23 'is disposed between the first support rod 21' and the second support rod 22 '. When the wheelchair frame 200 of the second embodiment is on an up or down slope, the swinging principle of the first arm 2 ′ and the second arm 3 is basically the same as the working principle of the wheelchair frame 100 of the first embodiment. The effect is similar, and the description will not be repeated here, except that a shock absorber 23 'is added to the first arm 2' of the second embodiment, so that the shock absorption effect of the first arm 2 'is better.

As shown in FIG. 10 to FIG. 11, a wheelchair frame 300 according to Embodiment 3 of the present application is developed. The wheelchair frame 300 of this embodiment includes a vehicle body 301, a first arm 302, a driving wheel 303, and a first auxiliary device. The wheel 304, the second auxiliary wheel 305, and a driving device (not shown). The middle portion of the first support arm 302 is pivotally connected to one end of the vehicle body 301 through a first support shaft 302a. 304 is pivotally connected to one end of the first arm 302, the second auxiliary wheel 305 is pivotally connected to the other end of the vehicle body 301 through a second support shaft 305a, and the driving wheel 303 is pivotally connected to the first The other end of one arm 302 is located between the first auxiliary wheel 304 and the second auxiliary wheel 305. The driving device is disposed on the first arm 302 and drives the driving wheel 303 to rotate. The first support shaft 301a and the second support shaft 305a are disposed in parallel, and the horizontal height of the first support shaft 302a is greater than the horizontal height of the second support shaft 305a. In addition, a shock absorber may be provided between the first arm 302 and the vehicle body 301, so that the first arm 302 may be damped to prevent vibration from being directly transmitted to the vehicle body 301, thereby improving comfort. .

As shown in FIG. 11 again, when the wheelchair frame 300 of this embodiment is walking on an uneven road surface, such as when going uphill, the second auxiliary wheel 305 will receive the vehicle body 301 after being subjected to the top thrust of the slope. This end is lifted, and the first arm 302 at the other end of the vehicle body 301 will swing, and the driving wheel 303 may leave the ground. At this time, since the first auxiliary wheel 304 is still landing, Therefore, the first support arm 302 generates an upward moment at one end of the first auxiliary wheel 304, so that the first support arm 302 swings, and then the first end of the driving wheel 303 makes the first The support arm 302 swings downward, so that the driving wheel 303 is affixed to the ground, thereby ensuring that the first auxiliary wheel 304, the driving wheel 303, and the second auxiliary wheel 305 can all be in contact with the ground at the same time to ensure efficient driving.

The above disclosure is only a good example of the present application, and of course, the scope of rights of the present application cannot be limited by this. Therefore, equivalent changes made according to the scope of the patent application of the present application still belong to the scope covered by the present application.

Claims

A wheelchair frame is characterized by comprising a vehicle body, a first support arm, a driving wheel, a first auxiliary wheel and a second auxiliary wheel, and a middle portion of the first support arm is pivotally connected to the support via a first support shaft. At one end of the vehicle body, the first auxiliary wheel is pivotally connected to one end of the first arm, the second auxiliary wheel is provided at the other end of the vehicle body, and the driving wheel is pivotally connected to the first The other end of the arm is located between the first auxiliary wheel and the second auxiliary wheel.
The wheelchair frame according to claim 1, wherein the wheelchair frame further comprises a second arm, the second arm is disposed between the vehicle body and the second auxiliary wheel, so One end of the second arm is pivotally connected to the vehicle body through a second support shaft, and the other end is pivotally connected to the second auxiliary wheel.
The wheelchair frame according to claim 2, wherein a shock absorber is provided between the second arm and the vehicle body.
The wheelchair frame according to claim 2, wherein a shock absorber is provided between the first arm and the second arm.
The wheelchair frame according to any one of claims 2 to 4, wherein the first arm is provided with a first abutment portion, and the second arm is provided with a first abutment portion capable of contacting the first arm. The tops are against each other and the second is against the top.
The wheelchair frame according to claim 1, wherein a shock absorber is provided between the first arm and the vehicle body.
The wheelchair frame according to claim 1, wherein the first arm comprises a first arm and a second arm, and the first arm and the second arm pass through the first arm The support shafts are pivotally connected to each other, and a shock absorber is provided between the first support rod and the second support rod.
The wheelchair frame according to claim 1, wherein the wheelchair frame further comprises a driving device, the driving device is disposed on the first arm and drives the driving wheel to rotate.
The wheelchair frame according to claim 2, wherein the first support shaft and the second support shaft are disposed in parallel.
The wheelchair frame according to claim 2, wherein a horizontal height of the first support shaft is greater than a horizontal height of the second support shaft.