CN201094706Y - Damping device of electric wheelchair - Google Patents

Abstract

A shock absorbing device for an electric wheelchair is connected to a frame and a connecting rod group of the electric wheelchair, and comprises: a driving wheel rocker arm pivotally connected to the frame and the connecting rod group, a driving wheel fixing seat, and a restoring member, wherein the restoring member is arranged between the driving wheel rocker arm and the driving wheel fixing seat, and the driving wheel fixing seat is arranged on a driving wheel group of the electric wheelchair. The effect of the utility model is to utilize the elastic restoring force of the restoring member so that the vibration energy generated when the electric wheelchair passes through an uneven ground can be absorbed, and then through the combination relationship between the restoring member and the connecting rod group, the force can be first absorbed by the mutual movement between the restoring member and the driving wheel rocker arm and the connecting rod group, and finally transmitted to the frame, thereby further improving the riding comfort and the positive force of the driving wheel group on the ground.

Description

Shock absorbing device for electric wheelchair

【Technical field】

The utility model relates to a shock absorbing device, in particular to a shock absorbing device for an electric wheelchair.

【Background technique】

For people with leg muscle injuries, elderly people with functional degeneration of their legs, physically handicapped, or chronically ill people who cannot move independently with their legs, an Electric Wheelchair can be used as a walking aid in daily life appliance.

Since the general road surface has obstacles such as ups and downs and bumps, such as stairs, or raised or sunken roads, etc., an electric wheelchair preferably has the ability to cross the above obstacles, and can effectively absorb the obstacles caused by such obstacles when crossing. Vibration caused by uneven road surface to increase ride comfort.

As shown in Figure 1, the chassis design of a known electric wheelchair adopts the so-called "six-bar linkage (Six-bar Linkage)" design, and cooperates two springs to carry out shock absorption to each electric wheelchair, the electric wheelchair The chassis includes a frame unit 1, a linkage unit 2, a wheel unit 3, and a power unit 4. The frame unit 1 has a bottom frame 11 and two columns extending upward from opposite sides of the front edge of the bottom frame 11. 12, and two main rods 13 respectively connecting the two uprights 12 and extending backwards, two corresponding first pivot points 111 are respectively provided on both sides of the bottom frame 11, and a second pivot point 111 is arranged on each upright 12 121 , each main rod 13 is provided with a third pivot point 131 .

The linkage unit 2 has two connecting rod groups 21 (due to viewing angle, only one connecting rod group 21 is shown in FIG. Corresponding to the third pivot point 131 of the main rod 13, and extending forward and backward to form an upper rocker arm 211 with a front joint 216 and a rear joint 217, and a second pivot point 121 pivotally connected to the corresponding column 12 and extending forward and backward to form A lower rocker arm 212 forming a front joint 218, a front wheel seat post 213 pivotally connected to the front joints 216, 218 of the upper rocker arm 211 and the lower rocker arm 212, a first pivot joint connected to the bottom frame 11 The joint 111 extends backward to form a rear joint 219 of the bottom side rod 214 , and a rear side rod 215 pivotally connected to the rear joints 217 , 219 of the upper rocker arm 211 and the bottom side rod 214 . In addition, the linkage unit 2 further has two first springs 22 respectively connected to the frame unit 1 and the upper rocker arms 211 of the two linkage groups 21, and two second springs 23 respectively connected to the two linkage groups 21 The rear side bar 215 is connected with the two main bars 13 of the frame unit 1 .

The wheel unit 3 is pivotally connected to the frame unit 1 and the linkage unit 2 , and has a driving wheel 31 pivotally connected to the linkage unit 2 . The power unit 4 is used to drive the wheel unit 3 to rotate, thereby driving the electric wheelchair to move. When the electric wheelchair is due to traveling on an uneven road surface, the configuration of the bottom side bar 214 and the rear side bar 215 of the two linkage groups 21 is utilized to reduce the impact caused by the two upper and lower rocker arms 211, 212 swinging up and down. The extent to which the two main rods 13 of the frame unit 1 are caused to incline, and then the elastic recovery force of the first and second springs 22, 23 are used to absorb the shock generated when the wheel unit 3 contacts with the uneven road surface, so that the occupant When riding, you will not feel too much shaking and vibration.

However, although the chassis of the known electric wheelchair has been designed in terms of shock absorption, the main mechanism (the first and second springs 22, 23) used for shock absorption is directly connected with the main body of the vehicle frame, so Although part of the force after stress has been absorbed by the elastic recovery force of these springs, the first and second springs 22, 23 all have one end fixed on the main body of the vehicle frame (frame unit 1), Therefore, most of the power of the first and second springs 22, 23 still needs to be absorbed by the frame body after being stressed, so the occupant still feels the discomfort caused by the vibration, so the known electric wheelchair There is still a lot of room for improvement in terms of suspension performance.

【Content of utility model】

The purpose of this utility model is to provide a shock absorbing device which is used for shock absorbing mechanism and is not directly connected to the frame of the electric wheelchair, further enhances its shock absorbing degree, and increases the comfort of the occupant.

The shock absorbing device of the electric wheelchair of the present utility model is connected to a vehicle frame and a connecting rod group of an electric wheelchair, and is used to absorb a driving wheel group of the electric wheelchair due to unevenness of the ground during operation. Vibration, the vehicle frame has a pivot, the link group has an upper rocker arm and a rear rocker arm, the rear rocker arm has a pivot end pivotally connected to the upper rocker arm, and a pivot end away from the pivot end A first pivot point, the damping device of the electric wheelchair includes a driving wheel rocker arm, a driving wheel fixing seat, and a restoring part.

The two ends of the driving wheel swing arm are respectively connected to the pivot of the vehicle frame and the first pivot point of the rear swing arm, and the drive wheel swing arm is provided with a first connecting portion at an end away from the pivot.

The driving wheel fixing seat is fixed on the driving wheel set of the electric wheelchair. One end of the driving wheel fixing seat is pivotally connected to the pivot of the vehicle frame, and a second connecting portion is provided at the end away from the pivot.

The return member is arranged between the first connecting portion of the driving wheel rocker arm and the second connecting portion of the driving wheel fixing seat, and is used to absorb the force generated by the driving wheel set connected to the driving wheel fixing seat. shock.

The effect of the utility model is to make use of the restoring element arranged between the driving wheel rocker arm and the driving wheel fixing seat, so that the vibration generated when the driving wheel set of the electric wheelchair contacts the uneven ground can be passed through the restoring element. Absorbed by the strong elastic recovery force, and then through the combined relationship between the utility model and the connecting rod group of an electric wheelchair, the power of the vibration can be firstly absorbed by the restoring member, the drive wheel rocker arm and the connecting rod group Absorbed by mutual movement, and finally transmitted to the frame, which further improves the riding comfort.

【Description of drawings】

Fig. 1 is a side view illustrating a known chassis device of an electric wheelchair;

Fig. 2 is a three-dimensional exploded view, illustrating the preferred embodiment of the shock absorbing device of the electric wheelchair of the present invention, a vehicle frame, a connecting rod group, and a situation after the decomposition of a drive wheel group; and

Fig. 3 is a perspective view illustrating the combination of the preferred embodiment with a vehicle frame, a connecting rod set, and a driving wheel set.

[Description of main component symbols]

5····Drive wheel rocker arm 200···Connecting rod group

51····First connection part 201···Rear rocker arm

52····Nut 202···Pivot end

6····Driving wheel fixing seat 203···First pivot point

61····Second connecting part 204···Upper rocker arm

7····Reply 300···Drive wheel set

100···Frame 400···Spring

101···Pivot

【Detailed ways】

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

As shown in Figures 2 and 3, the preferred embodiment of the damping device of the electric wheelchair of the present invention is connected to a vehicle frame 100 and a connecting rod group 200 of an electric wheelchair, and is used to absorb a shock absorber of the electric wheelchair. When the drive wheel set 300 moves due to the vibration generated by the uneven ground, the vehicle frame 100 has a pivot 101, the link set 200 has an upper rocker arm 204 and a rear rocker arm 201, and the rear rocker arm 201 There is a pivot end 202 pivotally connected to the upper rocker arm 204, and a first pivot point 203 away from the pivot end 202. The preferred embodiment of the shock absorbing device of the electric wheelchair includes a driving wheel rocker Arm 5 , a drive wheel fixing seat 6 , and a return member 7 .

The two ends of the drive wheel rocker arm 5 are respectively connected to the pivot 101 of the vehicle frame 100 and the first pivot point 203 of the rear rocker 201 , and the drive wheel rocker 5 is provided at an end away from the pivot 101 . There is a first connecting portion 51. In this embodiment, the driving wheel rocker arm 5 is in a slightly oblique rectangular shape, and the first connecting portion 51 on the driving wheel rocker arm 5 is a through hole.

The driving wheel fixing seat 6 is fixed on the driving wheel set 300 of the electric wheelchair, and one end of the driving wheel fixing seat 6 is pivotally connected to the pivot 101 of the vehicle frame 100 in the same way as the driving wheel rocker arm 5 , and A second connecting portion 61 is disposed at an end away from the pivot 101 . In order to cooperate with the first connecting portion 51 , the second connecting portion 61 of the driving wheel fixing base 6 is a protruding post extending upward from the end away from the pivot 101 , and can fit into the first connecting portion 51 Among them, one end of the protruding column protruding from the first connecting portion 51 is provided with a thread, and a nut 52 can be used to connect and fix the first and second connecting portions 51 and 61 .

The return member 7 is arranged between the first connecting portion 51 of the driving wheel rocker arm 5 and the second connecting portion 61 of the driving wheel fixing seat 6, and is used for absorbing the For the vibration generated by the driving wheel set 300, in this embodiment, the return member 7 is a spring, which is sleeved on the second connecting portion 61 and abuts against the first and second connecting portions 51, 61 .

It is worth noting that the utility model can be directly applied to an electric wheelchair with a six-bar linkage mechanism chassis as disclosed in the prior art, and cooperate with the known second spring 400 to further strengthen its shock-absorbing performance, thereby increasing the The smoothness of the electric wheelchair makes the occupant feel more comfortable.

When the driving wheel set 300 of the electric wheelchair is in contact with the uneven ground, the vibration generated by it will first be transmitted to the driving wheel fixing seat 6, and then compress the return member 7, and the elasticity of the return member 7 is Part of the force will be absorbed. In addition, since the drive wheel fixing seat 6 and the drive wheel rocker arm 5 are all pivotally connected on the same pivot 101, both of them will also move cooperatively when stressed, thereby The connecting rod group 200 that drives the electric wheelchair performs a corresponding movement, and absorbs part of the power again, and finally, some remaining power is transmitted to the main frame (seat, etc., not shown) of the electric wheelchair.

Compared with the known spring 400 that is used for shock absorption, it is directly connected with the vehicle frame 100. In the present utility model, the main element (the return member 7) that is responsible for absorbing the vibration force generated by the driving wheel is not directly connected to the vehicle frame 100. It is connected with the vehicle frame 100, but is connected to the main body of the vehicle frame 100 by means of the driving wheel fixing seat 6 and the driving wheel rocker arm 5 as mentioned above, thereby reducing the direct impact on the main body of the vehicle frame 100 during vibration .

In addition, another advantage of the present utility model is that: since the main restoring member 7 is directly connected with the driving wheel rocker arm 5, the combination of the two can keep the driving wheel set 300 against the ground during the shock absorbing process. positive force, thereby improving its handling performance.

To sum up the above, the shock absorbing device of the electric wheelchair of the present utility model utilizes the return member 7 arranged between the driving wheel rocker arm 5 and the driving wheel fixing seat 6, so that the driving wheel set 300 of the electric wheelchair is in contact with the uneven ground. The vibration generated during the contact can be absorbed by the elastic recovery force of the recovery, and then through the combined relationship between the utility model and the connecting rod group 200 of the electric wheelchair, the vibration force can be firstly absorbed by the recovery member 7 and the mutual movement between the driving wheel rocker arm 5 and the connecting rod group 200 is absorbed, and finally transmitted to the vehicle frame 100, thereby further improving the riding comfort. In this utility model, the return member directly arranged on the rocker arm 5 of the driving wheel enables it to simultaneously maintain the positive force of the driving wheel set 300 against the ground during the shock absorbing process, which helps to improve the handling performance , so the purpose of the utility model can really be achieved.

The above descriptions are only preferred embodiments of the present utility model, and should not limit the implementation scope of the present utility model.

Claims (2)

1. A shock absorbing device for an electric wheelchair, which is connected to a vehicle frame and a connecting rod set of an electric wheelchair, and is used to absorb shock generated by a driving wheel set of the electric wheelchair due to uneven ground during operation. Vibration, characterized in that: the vehicle frame has a pivot, the linkage set has an upper rocker arm and a rear rocker arm, the rear rocker arm has a pivot end pivotally connected to the upper rocker arm, and a A first pivot point of the pivot end, the shock absorbing device of the electric wheelchair includes: A drive wheel swing arm, the two ends of which are respectively connected to the pivot of the vehicle frame and the first pivot point of the rear swing arm, and the drive wheel swing arm is provided with a first connecting portion at the end away from the pivot; A driving wheel fixing seat, fixed on the driving wheel set of the electric wheelchair, one end of the driving wheel fixing seat is pivotally connected to the pivot of the vehicle frame, and a second connecting portion is provided at the end away from the pivot; as well as A return member for absorbing the vibration generated by the driving wheel set connected to the driving wheel fixing seat is located between the first connecting part of the driving wheel rocker arm and the second connecting part of the driving wheel fixing seat between. 2. The shock absorbing device of an electric wheelchair according to claim 1, wherein the restoring member is a spring.

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