Stair climbing auxiliary mechanism for wheelchair

Abstract

The utility model discloses a stair climbing auxiliary mechanism for a wheelchair, which comprises two stair climbing auxiliary mechanism units which are arranged on a first crawler stair climbing assembly and a second crawler stair climbing assembly on a stair climbing mechanism and are used for stair climbing assistance of the stair climbing mechanism. Two stair-climbing auxiliary mechanism units are arranged on a wheelchair stair-climbing mechanism, so that after a crawler-type stair-climbing mechanism moves to the top of a step ladder or moves downwards to the last step of the step ladder, part of crawler belts of the crawler-type stair-climbing auxiliary mechanism are in a suspended state, and the stair-climbing auxiliary mechanism is driven by a first telescopic driving part to stretch out; the auxiliary wheels on the auxiliary stair-climbing mechanism can assist in supporting the suspended part of the crawler belt of the crawler-type stair-climbing mechanism, so that the stair-climbing stability and safety of the stair-climbing mechanism are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheel chair auxiliary equipment technical field, concretely relates to a kind of climbing stairs auxiliary mechanism for wheel chair. BACKGROUND

[0002] Due to the factor of aging, the body function declines and it is difficult to walk, or due to surgery and accidents, more and more people need to use a wheelchair to walk. But the general wheelchair can only walk on flat ground, and cannot go up and down stairs. When the elevator is out of power and needs to walk up the stairs, the nursing staff needs to carry or hold the wheelchair user to go upstairs, and then lift the wheelchair to go upstairs and downstairs, which brings great inconvenience to the nursing staff and the wheelchair user.

[0003] In the process of climbing stairs of the existing wheelchair, a climbing mechanism is arranged at the bottom of the wheelchair to realize the climbing and descending actions of the wheelchair on the step ladder. The existing Chinese utility model patent (application number 202322282390.3) discloses a wheelchair climbing stairs auxiliary device, which is arranged with double tracks at the bottom of the wheelchair to make the tracks climb along the step ladder. However, it is found in practical use that the front end or rear end of the track type climbing mechanism is in a suspended state after climbing to the highest point of the step ladder or descending to the bottom layer, and no auxiliary climbing mechanism is arranged at the front end and rear end of the track type climbing mechanism to assist the stable climbing and descending of the auxiliary climbing mechanism, which affects the safety of the wheelchair. UTILITY MODEL CONTENTS

[0004] In view of the above defects or deficiencies in the prior art, it is desirable to provide a climbing stairs auxiliary mechanism for a wheelchair to solve the problem that the existing wheelchair climbing stairs auxiliary mechanism, after climbing to the highest point of the step ladder or descending to the bottom layer, the front end or rear end of the track is in a suspended state, and no auxiliary climbing mechanism is arranged at the front end and rear end of the track type climbing mechanism to assist the stable climbing and descending of the auxiliary climbing mechanism, which affects the safety of the wheelchair.

[0005] According to the technical scheme provided by the embodiment of the present application, a climbing stairs auxiliary mechanism for a wheelchair includes two climbing stairs auxiliary mechanism units, which are installed on the first track climbing assembly and the second track climbing assembly of the climbing mechanism, and are used for climbing stairs auxiliary of the climbing mechanism.

[0006] The stair-climbing auxiliary mechanism unit includes a first telescopic drive component, a first telescopic rod, two sets of linkage rods, and two auxiliary wheels. The two auxiliary wheels are mounted on both sides of the two linkage rods via a rotating shaft. The two linkage rods are arranged side by side and spaced apart. The first telescopic drive component is mounted between the two linkage rods. The first telescopic rod is movably mounted on the rotating shaft, and the first telescopic rod is fixedly connected to the output end of the first telescopic drive component. This allows the first telescopic drive component to drive the rotating shaft, on which the two auxiliary wheels are mounted, to move downward, so that the two auxiliary wheels provide stair-climbing auxiliary support for the first tracked stair-climbing assembly and the second tracked stair-climbing assembly.

[0007] Furthermore, the linkage rod is composed of a first connecting rod and a second connecting rod. The first connecting rod is provided with a connecting groove, and the end of the second connecting rod is engaged in the connecting groove. The second connecting rod is hinged to the first connecting rod.

[0008] Furthermore, the first connecting rod and the second connecting rod form a V-shaped structure after being connected.

[0009] Furthermore, a connecting block is movably mounted on the rotating shaft, and the top of the connecting block is fixedly connected to the first telescopic drive component.

[0010] Furthermore, the first tracked stair-climbing assembly and the second tracked stair-climbing assembly are provided with corresponding auxiliary ports for the extension and retraction of the stair-climbing auxiliary mechanism unit.

[0011] Furthermore, the second tracked stair-climbing component is movably mounted at the rear end of the first tracked stair-climbing component.

[0012] Furthermore, the stair-climbing mechanism is installed at the bottom of the wheelchair body.

[0013] In summary, the beneficial effects of this application are as follows:

[0014] 1. By setting two stair-climbing auxiliary mechanism units on the wheelchair stair-climbing mechanism, after the tracked stair-climbing mechanism moves to the top of the stairs or descends to the last step of the stairs, part of the track of the tracked stair-climbing mechanism is in a suspended state, so that the auxiliary stair-climbing mechanism extends under the drive of the first telescopic drive component, and the auxiliary wheel on the auxiliary stair-climbing mechanism provides auxiliary support for the suspended part of the track of the tracked stair-climbing mechanism, thereby improving the stair-climbing stability and safety of the stair-climbing mechanism;

[0015] Second, by setting the linkage rod on the auxiliary stair climbing mechanism to a foldable structure, the first connecting rod and the second connecting rod on the linkage rod form a V-shaped structure. This V-shaped linkage rod enhances the stability of the auxiliary stair climbing mechanism, and the auxiliary wheel can stably provide auxiliary support for the tracks at different heights and slopes. Attached Figure Description

[0016] Other features, objects, and advantages of the application will become more apparent from the following detailed description when read in connection with the following drawings:

[0017] Figure 1 It is a front view of the whole structure of the utility model;

[0018] Figure 2 It is a side view of the structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the connection structure of the stair climbing mechanism and the stair climbing auxiliary mechanism of the utility model;

[0020] Figure 4 It is a schematic diagram of the cross section structure of the stair climbing mechanism of the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the stair climbing auxiliary mechanism of the utility model.

[0022] Reference signs in the drawings: stair climbing auxiliary mechanism unit-100, first telescopic driving part-110, first telescopic rod-120, linkage rod-130, first connecting rod-131, second connecting rod-132, auxiliary wheel-140, rotating shaft-150, connecting block-160, stair climbing mechanism-200, first caterpillar track stair climbing assembly-210, second caterpillar track stair climbing assembly-220, wheelchair body-300. DETAILED DESCRIPTION

[0023] The application will be further described below in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] A stair climbing auxiliary mechanism for a wheelchair, which structure is as shown in Figures 1-5As shown, including two climbing auxiliary mechanism units 100, which are installed on the front end of the first crawler climbing assembly 210 and the rear end of the second crawler climbing assembly 220 of the climbing mechanism 200, for climbing auxiliary of the climbing mechanism 200; the climbing auxiliary mechanism unit 100 includes a first telescopic drive 110, a first telescopic rod 120, two sets of linkage rods 130 and two auxiliary wheels 140, the two auxiliary wheels 140 are installed on both sides of the two linkage rods 130 through the rotating shaft 150, and the rotating shaft 150 passes through the two linkage rods 130, the connecting block 160 is installed in the middle of the two linkage rods 130, and the two linkage rods 130 are arranged side by side and spaced apart, the first telescopic drive 110 is arranged in the middle of the two linkage rods 130, the first telescopic rod 120 is fixedly connected with the connecting block 160 on the rotating shaft 150, and the first telescopic rod 120 is fixedly connected with the output end of the first telescopic drive 110, so that the first telescopic drive 110 drives the first telescopic rod 120 to move downward, thereby driving the two linkage rods 130 to adjust the connection angle and the connection height, so that the two auxiliary wheels 140 installed on both sides of the two linkage rods 130 move downward, so that the two auxiliary wheels 140 assist and support the climbing suspension of the first crawler climbing assembly 210 and the second crawler climbing assembly 220, thereby improving the stability and safety of the wheelchair climbing.

[0026] In the process of the auxiliary climbing mechanism 200 assisting the wheelchair climbing mechanism 200 to climb, the climbing mechanism 200 arranged at the bottom of the wheelchair is started, so that the first crawler climbing assembly 210 and the second crawler climbing assembly 220 on the climbing mechanism 200 are started, so that the crawler rotates, thereby making the crawler climb along the inclination angle of the step ladder, when the crawler moves to the last step of the step ladder, the rear end is in a suspended state, the control system on the wheelchair controls the two climbing auxiliary mechanism units 100 to start, so that the first telescopic drive 110 on the climbing auxiliary mechanism unit 100 drives the first telescopic rod 120 to elongate, thereby driving the rotating shaft 150 connected with the first telescopic rod 120 to move, so that the two linkage rods 130 connected with the rotating shaft 150 adjust the connection angle with the elongation of the first telescopic rod 120, so that the auxiliary wheels 140 connected with the linkage rods 130 assist and support according to the height and angle of the crawler suspension, thereby keeping the stability of the climbing mechanism 200, thereby improving the stability and safety of the wheelchair climbing.

[0027] As a preferred embodiment, please refer to Figure 4 and Figure 5, linkage rod 130 is composed of first connecting rod 131 and second connecting rod 132, first connecting rod 131 is provided with connecting groove, second connecting rod 132 end is connected in connecting groove, and second connecting rod 132 is hinged with first connecting rod 131, so that second connecting rod 132 is adjusted with the hinged connection angle of first connecting rod 131 along with the movement of first telescopic rod 120, so that linkage rod 130 adjusts the connection length and height, so that auxiliary wheel 140 assists the track of different height and different angle.

[0028] As a preferred embodiment, please refer to Figure 4 And Figure 5 First connecting rod 131 and second connecting rod 132 are connected in V-shaped structure, so that the V-shaped structure of linkage rod 130 strengthens the stability of auxiliary climbing mechanism 200, so that auxiliary wheel 140 can stably support the track of different height and slope.

[0029] As a preferred embodiment, please refer to Figure 5 Connecting block 160 is movably installed on rotating shaft 150, and the top of connecting block 160 is fixedly connected with first telescopic driving part 110, when auxiliary wheel 140 rotates, rotating shaft 150 is driven to rotate, and connecting block 160 movably installed on rotating shaft 150 does not rotate synchronously with rotating shaft 150, which does not affect the support of first telescopic rod 120.

[0030] As a preferred embodiment, please refer to Figure 3 And Figure 4 First track climbing assembly 210 and second track climbing assembly 220 are provided with corresponding auxiliary ports, so that the telescopic and storage of climbing auxiliary mechanism unit 100 in the connecting box on first track climbing assembly 210 and second track climbing assembly 220 are facilitated.

[0031] As a preferred embodiment, please refer to Figure 1 And Figure 3 Second track climbing assembly 220 is movably installed at the rear end of first track climbing assembly 210, and second telescopic driving mechanism is installed at the top of second track climbing assembly 220, so that second telescopic driving part on second telescopic driving mechanism drives second track climbing assembly 220 to adjust the climbing angle, so that climbing mechanism 200 can be used for climbing stairs of different height.

[0032] As a preferred embodiment, please refer to Figure 1 And Figure 2 Climbing assembly is installed at the bottom of wheelchair body 300, instead of the original back type, so that the wheelchair does not need to be inclined during climbing, reduces the discomfort of wheelchair user during climbing, and improves the comfort of wheelchair.

[0033] The working principle of the stair climbing auxiliary mechanism for the wheelchair is as follows:

[0034] In the process that the stair climbing mechanism 200 assists the wheel 140 to climb stairs, the stair climbing mechanism 200 arranged at the bottom of the wheelchair is started, so that the first crawler belt stair climbing assembly 210 and the second crawler belt stair climbing assembly 220 arranged on the stair climbing mechanism 200 are started, the rotating driving member arranged at the connection position of the first crawler belt stair climbing assembly 210 and the second crawler belt stair climbing assembly 220 drives the driving gear to rotate, so that the driving gear drives the annular belt to rotate, the driven gear connected with the annular belt rotates, the double crawlers arranged on the first crawler belt stair climbing assembly 210 and the second crawler belt stair climbing assembly 220 rotate, so that the crawler belt climbs along the inclined angle of the step ladder, when the crawler belt moves to the last step of the step ladder, the rear end of the crawler belt is in a suspended state, the control system arranged on the wheelchair controls the two stair climbing auxiliary mechanism units 100 to start, so that the first telescopic driving member 110 arranged on the stair climbing auxiliary mechanism unit 100 drives the first telescopic rod 120 to extend, so that the rotating shaft 150 connected with the first telescopic rod 120 moves, the two linkage rods 130 connected with the rotating shaft 150 adjust the connection angle of the first connecting rod 131 and the second connecting rod 132 according to the extension of the first telescopic rod 120, so that the auxiliary wheel 140 connected with the linkage rod 130 supports the crawler belt in the suspended state, so that the stair climbing mechanism 200 keeps stable, and the stability and safety of the wheelchair climbing stairs are improved.

[0035] The stair climbing auxiliary mechanism for the wheelchair has the following beneficial effects:

[0036] I. By arranging two stair climbing auxiliary mechanism units 100 on the stair climbing mechanism 200 of the wheelchair, when the crawler belt type stair climbing mechanism 200 moves to the top of the step ladder or moves to the last step of the step ladder, part of the crawler belt of the crawler belt type stair climbing mechanism 200 is in a suspended state, so that the auxiliary stair climbing mechanism 200 extends under the drive of the first telescopic driving member 110, so that the auxiliary wheel 140 arranged on the auxiliary stair climbing mechanism 200 supports the suspended part of the crawler belt of the crawler belt type stair climbing mechanism 200, and the stability and safety of the stair climbing mechanism 200 are improved.

[0037] II. By arranging the linkage rod 130 arranged on the auxiliary stair climbing mechanism 200 in a foldable structure, the first connecting rod 131 and the second connecting rod 132 arranged on the linkage rod 130 form a V-shaped structure, the V-shaped structure of the linkage rod 130 strengthens the stability of the auxiliary stair climbing mechanism 200, and the auxiliary wheel 140 can stably support the crawler belt with different heights and slopes.

[0038] The above description is only the preferred embodiment of the application and the scheme of the applied technical principles. Meanwhile, the utility model range involved in the application is not limited to the technical scheme formed by the specific combination of the above technical features, and should also cover other technical schemes formed by the combination of the above technical features or equivalent features without departing from the utility model concept. For example, the technical scheme formed by replacing the above features with the technical features disclosed in the application (but not limited to) having similar functions.

Claims

1. A stair climbing assisting mechanism for a wheelchair, characterized in that: two stair climbing assisting mechanism units (100) are installed on a first crawler climbing assembly (210) and a second crawler climbing assembly (220) of a stair climbing mechanism (200) to assist the stair climbing of the stair climbing mechanism (200); the stair climbing assisting mechanism unit (100) comprises a first telescopic driving member (110), a first telescopic rod (120), two sets of linkage rods (130) and two auxiliary wheels (140), the two auxiliary wheels (140) are installed on both sides of the two linkage rods (130) through a rotating shaft (150), the two linkage rods (130) are arranged side by side and spaced apart, the first telescopic driving member (110) is installed in the middle of the linkage rods (130), the first telescopic rod (120) is movably installed on the rotating shaft (150), and the first telescopic rod (120) is fixedly connected with an output end of the first telescopic driving member (110), so that the first telescopic driving member (110) drives the rotating shaft (150) on which the two auxiliary wheels (140) are installed to move downward, so that the two auxiliary wheels (140) are used for the stair climbing assisting support of the first crawler climbing assembly (210) and the second crawler climbing assembly (220). The linkage rod (130) is composed of a first connecting rod (131) and a second connecting rod (132), the first connecting rod (131) is provided with a connecting groove, the second connecting rod (132) is clamped at the end into the connecting groove, and the second connecting rod (132) is hinged with the first connecting rod (131). The first connecting rod (131) and the second connecting rod (132) are connected in a V-shaped structure.

2. The stair climbing assist mechanism for a wheelchair of claim 1, wherein: The rotating shaft is movably installed with a connecting block (160), and the connecting block (160) is fixedly connected with the first telescopic driving member (110) at the top.

3. A stair climbing assist mechanism for a wheelchair as defined in claim 2, characterized in that: The first crawler climbing assembly (210) and the second crawler climbing assembly (220) are provided with corresponding auxiliary ports for the telescopic extension of the stair climbing assisting mechanism unit (100).

4. The stair climbing assist mechanism for a wheelchair of claim 1, wherein: The second crawler climbing assembly (220) is movably installed at the rear end of the first crawler climbing assembly (210).

5. The stair climbing assist mechanism for a wheelchair of claim 1, wherein: The stair climbing mechanism (200) is installed at the bottom of the wheelchair body (300).

6. The stair climbing assist mechanism for a wheelchair of claim 1, wherein: ​ 7. The stair climbing assist mechanism for a wheelchair of claim 1, wherein: ​

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