Wheelchair lifting machine

Abstract

The utility model discloses a wheelchair lifting machine which comprises an installation base, two sets of folding and unfolding driving mechanisms symmetrically arranged on the installation base and a bearing disc arranged between the two sets of folding and unfolding driving mechanisms. The two sides of one end of the bearing disc are hinged to the corresponding folding and unfolding driving mechanisms correspondingly. Damping assemblies are arranged on the two sides of the other end of the bearing disc. The folding and unfolding driving mechanism can drive the bearing disc to be switched between the horizontal state and the storage state. The damping assembly can make contact with the folding and unfolding driving mechanism in the process that the bearing disc is switched from the horizontal state to the storage state. Vibration generated in the folding and storing process of the bearing disc is effectively relieved, noise generated in the folding and storing process is reduced, the use experience is better, and the structural reliability is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to transport means technical field, in particular to a wheelchair lifting machine. BACKGROUND

[0002] The wheelchair lifting machine is a tool for wheelchair passengers to get in and out of a vehicle, effectively solves the problem that wheelchair passengers are inconvenient to get in and out of the vehicle, and brings great convenience for wheelchair passengers.

[0003] However, the existing wheelchair lifting machine finds that the vibration and noise generated in the tray folding process are large in the actual use process, resulting in poor use experience. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the above-mentioned shortcoming, provides a wheelchair lifting machine, effectively slows down the vibration generated in the folding process of the bearing disc and reduces the noise generated in the folding process, and the use experience is better, and the structural reliability is higher.

[0005] In order to realize the above-mentioned purpose, the specific scheme of the utility model is as follows:

[0006] A wheelchair lifting machine, including mounting seat, two groups of symmetry are set up in the mounting seat's collection and expansion drive mechanism, set up between two groups of collection and expansion drive mechanism's bearing disc, the bearing disc one end's both sides are respectively with corresponding collection and expansion drive mechanism articulates, the bearing disc other end's both sides are provided with damping assembly,

[0007] The collection and expansion drive mechanism can drive the bearing disc to switch between the horizontal state and the storage state, wherein the damping assembly can contact the collection and expansion drive mechanism during the switching process of the bearing disc from the horizontal state to the storage state.

[0008] Further, the damping assembly includes a damping mounting block and a damping piece, the damping mounting block is detachably connected to the side wall of the bearing disc through a fastener, and the damping piece is detachably connected to the damping mounting block.

[0009] Further, the damping piece is damping glue.

[0010] Further, the mounting seat is provided with a fixing seat corresponding to each group of collection and expansion drive mechanism.

[0011] Each of the aforementioned retraction and extension drive mechanisms includes a telescopic power component, a multi-stage linkage assembly, and an auxiliary retraction and extension assembly; the fixed end of the telescopic power component is hinged to a fixed seat; the movable end of the telescopic power component is hinged to the multi-stage linkage assembly; the multi-stage linkage assembly is hinged to the fixed seat; the bearing plate is hinged to the multi-stage linkage assembly; and the auxiliary retraction and extension assembly is hinged to both the multi-stage linkage assembly and the bearing plate.

[0012] Furthermore, the auxiliary retraction and extension assembly includes a drive arm, a sliding arm, a linkage rod, and a flip contact seat; the bearing plate is provided with hinge shafts on both sides of the end near the retraction and extension drive mechanism; a first transition plate is connected between the two hinge shafts;

[0013] One end of the drive arm is hinged to the hinge shaft; the sliding arm is slidably sleeved on the drive arm; the sliding arm is provided with a limiting strip hole; the other end of the drive arm is provided with a limiting shaft; the limiting shaft extends movably into the limiting strip hole; one end of the linkage rod is hinged to the first transition plate; the other end of the linkage rod is movably hinged to one end of the sliding arm; the flip contact seat is hinged to the other end of the sliding arm.

[0014] Furthermore, the flip contact seat is inverted U-shaped, and the two side walls of the flip contact seat are hinged to the sliding arm; the surface of the flip contact seat facing away from its opening is used to contact the multi-stage linkage assembly.

[0015] Furthermore, a first buffer is provided between the sliding arm and the driving arm, one end of the first buffer is connected to the sliding arm, and the other end of the first buffer is connected to the driving arm; the driving arm is provided with a clearance hole for avoiding the first buffer.

[0016] Furthermore, the multi-stage linkage assembly includes a first link, a second link, and a third link;

[0017] The first and second connecting rods are spaced apart vertically, with one end of each connecting rod hinged to different positions on the fixed base; the other ends of the first and second connecting rods are hinged to different positions on one end of the third connecting rod; the fixed end of the telescopic power component is hinged to the hinge point between the first connecting rod and the fixed base; the movable end of the telescopic power component is hinged to the other end of the second connecting rod; and the bearing plate is hinged to the other end of the third connecting rod.

[0018] Furthermore, the third link is hinged to a handrail; the handrail is movably inserted through the third link; one end of the handrail is hinged to a limiting shaft;

[0019] A second buffer is also provided between the handrail and the third link; the fixed end of the second buffer is hinged to the handrail, and the movable end of the second buffer is hinged to the third link.

[0020] Furthermore, a buffer elastic element is sleeved on the movable end of the telescopic power component.

[0021] The beneficial effects of this invention are as follows: By setting shock-absorbing components on both sides of the carrier plate, the shock-absorbing components can gradually come into contact with the unfolding drive mechanism during the switching process, thereby reducing the vibration of the carrier plate during the folding and storage process and reducing the noise generated during the folding and storage process, resulting in a better user experience and higher structural reliability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0024] Figure 3 yes Figure 1 A magnified view of a portion of point B in the middle;

[0025] Figure 4 This is a perspective view of the present invention from another angle;

[0026] Figure 5 This is a perspective view of a portion of the structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the auxiliary retraction component of this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the bearing plate of this utility model when it is in a horizontal state;

[0029] Figure 8 This is a schematic diagram of the structure of the carrier plate of this utility model when it is in the storage state;

[0030] Explanation of reference numerals in the attached drawings: 1. Mounting base; 11. Fixed base; 21. Telescopic power component; 22. Multi-stage linkage assembly; 221. First linkage; 222. Second linkage; 223. Third linkage; 23. Auxiliary retraction assembly; 231. Drive arm; 2311. Limiting shaft; 232. Sliding arm; 2321. Limiting strip hole; 233. Linkage rod; 234. Flip contact seat; 235. Wear-resistant pad; 236. First buffer component; 24. Buffer elastic component; 3. Bearing plate; 31. Hinge shaft; 32. First transition plate; 33. Second transition plate; 41. Shock-absorbing mounting block; 411. First body; 412. Second body; 413. First mounting arm; 414. Second mounting arm; 415. Strip hole; 42. Shock-absorbing component; 43. Fastener; 5. Handrail; 6. Second buffer component. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not to limit the scope of the present invention.

[0032] like Figures 1 to 8 As shown in this embodiment, a wheelchair lift can be applied to a vehicle to facilitate wheelchair users getting on and off the vehicle. The wheelchair lift includes a mounting base 1, two sets of symmetrically arranged retraction and extension drive mechanisms on the mounting base 1, and a support plate 3 located between the two sets of retraction and extension drive mechanisms. The two sides of one end of the support plate 3 are respectively hinged to the corresponding retraction and extension drive mechanisms. Shock-absorbing components are provided on both sides of the other end of the support plate 3.

[0033] The retraction drive mechanism can drive the carrier plate 3 to switch between a horizontal state and a retracted state; wherein, the shock absorption component can contact the retraction drive mechanism during the process of the carrier plate 3 switching from a horizontal state to a retracted state.

[0034] Specifically, in practical application, the wheelchair lift of this embodiment is installed on an external vehicle via the mounting base 1. When a wheelchair user needs to board the vehicle, the retraction drive mechanism places the support plate 3 in a grounded state in contact with the ground. Then, the wheelchair user places themselves on the support plate 3. Next, the retraction drive mechanism lifts the support plate 3 and the wheelchair user, causing the support plate 3 to be in a horizontal state. Figure 7 As shown, after the wheelchair user enters the vehicle, the retraction drive mechanism switches the support plate 3 from a horizontal state to a retracted state, as follows: Figure 8 As shown, during the switching process, the shock-absorbing components can gradually come into contact with the unfolding drive mechanism, thereby providing a shock-absorbing effect on the carrier plate 3, effectively reducing the vibration generated by the carrier plate 3 during the folding and storage process and reducing the noise generated during the folding and storage process, resulting in a better user experience and higher structural reliability.

[0035] Similarly, when the wheelchair user gets off the vehicle, the retraction drive mechanism switches the support plate 3 from the retracted state to the horizontal state. Then the wheelchair user is placed on the support plate 3. Next, the retraction drive mechanism lowers the support plate 3 and the wheelchair user, so that the support plate 3 is in the ground state.

[0036] like Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8As shown in this embodiment, in some embodiments of the wheelchair lift, the shock absorption assembly includes a shock absorption mounting block 41 and a shock absorption element 42. The shock absorption mounting block 41 is detachably connected to the side wall of the support plate 3 via fasteners 43. The shock absorption element 42 is detachably connected to the shock absorption mounting block 41. This embodiment provides a shock absorption mounting block 41 for the installation of the shock absorption element 42. The shock absorption mounting block 41 is detachably connected to the side wall of the support plate 3 for easy disassembly and maintenance. When the support plate 3 switches from a horizontal state to a folded state, the shock absorption element 42 gradually contacts the folding drive mechanism, thereby providing shock absorption for the support plate 3, resulting in higher structural reliability.

[0037] like Figure 2 As shown in this embodiment, in some embodiments of a wheelchair lift, the shock-absorbing mounting block 41 includes a first body 411, a second body 412, a first mounting arm 413, and a second mounting arm 414; one end of the second body 412 is angularly connected to one end of the first body 411; the first mounting arm 413 extends vertically from one side of the first body 411; the second mounting arm 414 extends vertically from one side of the second body 412; the first mounting arm 413 and the second mounting arm 414 are respectively connected to the side wall of the support plate 3 by fasteners 43; both the first body 411 and the second body 412 are equipped with shock-absorbing components 42. This embodiment uses the first mounting arm 413 and the second mounting arm 414 to facilitate the installation of the shock-absorbing mounting block 41; by providing shock-absorbing components 42 on both the first body 411 and the second body 412, the shock absorption effect on the support plate 3 during folding and storage is further improved.

[0038] In addition, the first body 411 and the second body 412 are connected at an angle so that the two shock absorbers 42 can make better contact with the extension and retraction drive mechanism.

[0039] like Figure 2 As shown in this embodiment, in some embodiments of the wheelchair lift, both the first mounting arm 413 and the second mounting arm 414 are provided with strip-shaped holes 415; the fasteners 43 are screws or bolts. This arrangement is to adjust the position of the shock absorber 42 so that the shock absorber 42 can better contact the folding and unfolding drive mechanism during the folding and storage of the support plate 3.

[0040] In this embodiment of the wheelchair lift, preferably, the shock absorber 42 is made of shock-absorbing rubber, which has a good shock absorption effect and low cost.

[0041] like Figure 1 , Figures 3 to 5 , Figure 7 and Figure 8As shown in this embodiment, in some embodiments of the wheelchair lift, the mounting base 1 is provided with a fixed base 11 corresponding to each set of folding and extending drive mechanisms; the fixed base 11 is provided to facilitate the installation of the folding and extending drive mechanisms;

[0042] Each of the aforementioned retraction and extension drive mechanisms includes a telescopic power component 21, a multi-stage linkage assembly 22, and an auxiliary retraction and extension assembly 23; the fixed end of the telescopic power component 21 is hinged to the fixed base 11; the movable end of the telescopic power component 21 is hinged to the multi-stage linkage assembly 22; the multi-stage linkage assembly 22 is hinged to the fixed base 11; the bearing plate 3 is hinged to the multi-stage linkage assembly 22; and the auxiliary retraction and extension assembly 23 is hinged to both the multi-stage linkage assembly 22 and the bearing plate 3.

[0043] Specifically, in practical applications, the telescopic power component 21 outputs power, which, through the linkage of the multi-stage linkage assembly 22 and the auxiliary retraction assembly 23, enables the lifting and folding action of the support plate 3, allowing the support plate 3 to switch between grounded state, horizontal state and retracted state, thereby facilitating wheelchair passengers to get on and off the vehicle.

[0044] In this embodiment, the telescopic power component 21 of the wheelchair lift is one of a cylinder, a hydraulic cylinder, or an electric actuator.

[0045] like Figure 1 , Figures 3 to 8 As shown in this embodiment, in some embodiments of a wheelchair lift, the auxiliary folding and unfolding assembly 23 includes a drive arm 231, a sliding arm 232, a linkage rod 233, and a flip contact seat 234; the bearing plate 3 is provided with hinge shafts 31 on both sides near the end of the folding and unfolding drive mechanism; a first transition plate 32 is connected between the two hinge shafts 31.

[0046] One end of the drive arm 231 is hinged to the hinge shaft 31; the sliding arm 232 is slidably sleeved on the drive arm 231; the sliding arm 232 is provided with a limiting strip hole 2321; the other end of the drive arm 231 is provided with a limiting shaft 2311; the limiting shaft 2311 extends movably into the limiting strip hole 2321; one end of the linkage rod 233 is hinged to the first transition plate 32; the other end of the linkage rod 233 is movably hinged to one end of the sliding arm 232; the flip contact seat 234 is hinged to the other end of the sliding arm 232.

[0047] Specifically, when a wheelchair user needs to board, the telescopic power component 21 extends outward, and through the linkage of the multi-stage linkage assembly 22 and the auxiliary retraction assembly 23, the support plate 3 is placed in a grounded state. After the wheelchair user enters the support plate 3, the telescopic power component 21 retracts inward. At this time, the telescopic power component 21 drives the support plate 3 to rise through the multi-stage linkage assembly 22, and the first transition plate 32 is in a folded state. After the flip contact seat 234 contacts the multi-stage linkage assembly 22, the multi-stage linkage assembly 22 presses the flip contact seat 234 to flip it, so that the flip contact seat 234 and the multi-stage linkage assembly 22 can reliably connect. Then, the multi-stage linkage assembly 22 applies downward pressure to the sliding arm 232 through the flip contact seat 234, causing the sliding arm 232 to slide relative to the drive arm 231. The limiting shaft 2311 moves relative to the limiting strip hole 2321. At this time, the sliding arm 232 pushes the first transition plate 32 from the folded state to the horizontal state through the linkage rod 233 until the limiting shaft 2311 abuts against the upper end of the limiting strip hole 2321. At this time, the sliding arm 232 and the drive arm 231 form an integral unit, and the first transition plate 32 is in a horizontal state. At this time, the support plate 3 is also in a horizontal state, so that the wheelchair passenger can transfer from the support plate 3 to the vehicle.

[0048] As the telescopic power component 21 retracts further inward, the multi-stage linkage assembly 22 applies downward pressure to the drive arm 231 through the flip contact seat 234 and the sliding arm 232, thereby driving the bearing plate 3 to flip upward with the hinge point between the bearing plate 3 and the multi-stage linkage assembly 22 as the fulcrum, so that the bearing plate 3 switches from the horizontal state to the retracted state until the bearing plate 3 is completely switched to the retracted state. At the same time, the bearing plate 3 drives the first transition plate 32 in the horizontal state to move onto the mounting base 1.

[0049] Similarly, when a wheelchair user needs to get into the vehicle, the support plate 3 switches from a stowed state to a horizontal state. The operating principle is the reverse, so it will not be described in detail here.

[0050] like Figure 3 , Figure 6 and Figure 7 As shown in this embodiment, in some embodiments of the wheelchair lift, the flip contact seat 234 is inverted U-shaped, and the two side walls of the flip contact seat 234 are hinged to the sliding arm 232; the surface of the flip contact seat 234 facing away from its opening is used to contact the multi-stage linkage assembly 22. This embodiment, by setting the flip contact seat 234 to be inverted U-shaped, provides a larger contact area between the flip contact seat 234 and the multi-stage linkage assembly 22, so that the multi-stage linkage assembly 22 can reliably apply thrust to the sliding arm 232 and the drive arm 231 through the flip contact seat 234, resulting in higher structural reliability and stability.

[0051] like Figure 3 and Figure 6As shown in this embodiment, a wheelchair lift preferably has a wear-resistant pad 235 on the surface of the flip contact seat 234 facing away from its opening. This arrangement reduces wear on the flip contact seat 234 and the multi-stage linkage assembly 22, and also helps to reduce noise generated when the flip contact seat 234 and the multi-stage linkage assembly 22 move relative to each other.

[0052] like Figure 6 As shown in this embodiment, a wheelchair lift, in some embodiments, includes a first buffer 236 between the sliding arm 232 and the drive arm 231. One end of the first buffer 236 is connected to the sliding arm 232, and the other end is connected to the drive arm 231. The drive arm 231 has a clearance hole for avoiding the first buffer 236. This embodiment, by providing the first buffer 236, further improves the stability of the sliding arm 232 when sliding relative to the drive arm 231, resulting in a more reliable structure. Preferably, the first buffer 236 is a nitrogen spring.

[0053] like Figure 1 , Figures 3 to 5 , Figure 7 and Figure 8 As shown in this embodiment, in some embodiments of a wheelchair lift, the multi-stage linkage assembly 22 includes a first linkage 221, a second linkage 222, and a third linkage 223; the first linkage 221 and the second linkage 222 are spaced vertically apart, and one end of the first linkage 221 and the second linkage 222 are respectively hinged to different positions on the fixed base 11; the other ends of the first linkage 221 and the second linkage 222 are respectively hinged to different positions on one end of the third linkage 223; the fixed end of the telescopic power member 21 is hinged to the hinge point between the first linkage 221 and the fixed base 11; the movable end of the telescopic power member 21 is hinged to the other end of the second linkage 222; and the bearing plate 3 is hinged to the other end of the third linkage 223.

[0054] Specifically, a parallelogram structure is formed between the hinge point of the first link 221 and the fixed seat 11, the hinge point of the first link 221 and the third link 223, the hinge point of the second link 222 and the fixed seat 11, and the hinge point of the second link 222 and the third link 223; thus, when the flip contact seat 234 is not in contact with the second link 222, when the telescopic power member 21 drives the second link 222 to swing, the third link 223 can drive the bearing plate 3 to perform lifting and lowering movements.

[0055] When the carrier plate 3 switches from a horizontal state to a stored state, the flip contact seat 234 contacts the second link 222. The second link 222 presses the flip contact seat 234 to flip, so that the surface of the flip contact seat 234 facing away from its opening is in complete contact with the surface of the second link 222. This reliably pushes the sliding arm 232 to slide relative to the drive arm 231, thereby driving the first transition plate 32 to flip from the folded state to the horizontal state. As the second link 222 further pushes the sliding arm 232, the sliding arm 232 causes the carrier plate 3 to flip upward and fold for storage through the drive arm 231.

[0056] When the carrier plate 3 needs to switch from the stored state to the horizontal state, under the joint action of the nitrogen spring and the second link 222, the carrier plate 3 gradually flips from the stored state to the horizontal state until it is in a horizontal state; as the second link 222 swings further, under the action of the nitrogen spring, the first transition plate 32 flips from the horizontal state to the folded state.

[0057] like Figure 1 , Figure 4 and Figure 5 , Figure 7 and Figure 8 As shown in this embodiment, in some embodiments of the wheelchair lift, the third link 223 is hinged to an armrest 5; the armrest 5 is movably inserted through the third link 223; one end of the armrest 5 is hinged to the limiting shaft 2311. Specifically, this embodiment provides the armrest 5 so that wheelchair occupants can hold onto it when entering or exiting the support plate 3, thereby ensuring the stability of the wheelchair and reducing the psychological burden on wheelchair occupants during the lifting and lowering process of the support plate 3.

[0058] A second buffer 6 is also provided between the handrail 5 and the third connecting rod 223; the fixed end of the second buffer 6 is hinged to the handrail 5, and the movable end of the second buffer 6 is hinged to the third connecting rod 223. Specifically, when the support plate 3 switches from a horizontal state to a retracted state, the drive arm 231 pushes the handrail 5 to rotate around the hinge point where the handrail 5 and the third connecting rod 223 are hinged, through the limiting shaft 2311. The second buffer 6 provides cushioning for the handrail 5, thereby achieving synchronous movement between the handrail 5 and the support plate 3. Preferably, the second buffer 6 is a nitrogen spring.

[0059] like Figure 1 , Figure 4 , Figure 7 and Figure 8As shown in this embodiment, in some embodiments of the wheelchair lift, the movable end of the telescopic power member 21 is fitted with a buffer elastic member 24. This embodiment, by providing the buffer elastic member 24, improves the stability of the telescopic power member 21 when extending or retracting, thereby making the movement of the entire structure smoother. Specifically, the buffer elastic member 24 is a spring.

[0060] like Figure 1 , Figure 4 , Figure 7 and Figure 8 As shown in this embodiment, in some embodiments of the wheelchair lift, the end of the support plate 3 away from the retraction drive mechanism is hinged with a second transition plate 33; the second transition plate 33 can rotate relative to the support plate 3, and when the wheelchair occupant needs to drive out of or into the support plate 3, the second transition plate is rotated to a horizontal state so that the wheelchair occupant can drive into or out of the support plate 3.

[0061] The above description is only a preferred embodiment of the present utility model. Therefore, any equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included within the protection scope of the present utility model patent application.

Claims

1. A wheelchair lift comprising: The application relates to a telescopic support device, which comprises a mounting base, two groups of folding and unfolding driving mechanisms symmetrically arranged on the mounting base, and a bearing disc arranged between the two groups of folding and unfolding driving mechanisms; the two sides of one end of the bearing disc are hingedly connected with corresponding folding and unfolding driving mechanisms; the two sides of the other end of the bearing disc are provided with damping assemblies. The folding and unfolding driving mechanisms can drive the bearing disc to switch between a horizontal state and a storage state; wherein the damping assemblies can contact the folding and unfolding driving mechanisms during the switching process of the bearing disc from the horizontal state to the storage state.

2. A wheelchair lift as defined in claim 1 wherein, The damping assemblies comprise damping mounting blocks and damping pieces; the damping mounting blocks are detachably connected on the side walls of the bearing disc through fasteners; and the damping pieces are detachably connected on the damping mounting blocks.

3. A wheelchair lift as defined in claim 2 wherein, The damping pieces are damping glue.

4. A wheelchair lift as claimed in any one of claims 1 to 3, characterized in that The mounting base is respectively provided with a fixed seat corresponding to each group of folding and unfolding driving mechanisms. Each group of folding and unfolding driving mechanisms comprises a telescopic power piece, a multi-stage connecting rod assembly and an auxiliary folding and unfolding assembly; the fixed end of the telescopic power piece is hingedly connected with the fixed seat; the movable end of the telescopic power piece is hingedly connected with the multi-stage connecting rod assembly; the multi-stage connecting rod assembly is hingedly connected on the fixed seat; the bearing disc is hingedly connected with the multi-stage connecting rod assembly; and the auxiliary folding and unfolding assembly is hingedly connected with the multi-stage connecting rod assembly and the bearing disc.

5. A wheelchair lift as defined in claim 4 wherein, The auxiliary folding and unfolding assembly comprises a driving arm, a sliding arm, a linkage rod and a turnover contact seat; the two sides of one end of the bearing disc close to the folding and unfolding driving mechanisms are provided with hinging shafts; and a first transition plate is connected between the two hinging shafts. One end of the driving arm is hingedly connected on the hinging shaft; the sliding arm is slidingly sleeved on the driving arm; the sliding arm is provided with a limiting strip hole; the other end of the driving arm is provided with a limiting shaft; the limiting shaft is movably inserted into the limiting strip hole; one end of the linkage rod is hingedly connected with the first transition plate; the other end of the linkage rod is movably hingedly connected with one end of the sliding arm; and the turnover contact seat is hingedly connected on the other end of the sliding arm.

6. A wheelchair lift as defined in claim 5 wherein, The turnover contact seat is in an inverted U shape; the two side walls of the turnover contact seat are hingedly connected with the sliding arm; and the surface of the turnover contact seat away from the opening thereof is used for contacting the multi-stage connecting rod assembly.

7. A wheelchair lift as defined in claim 5 wherein, A first buffer piece is arranged between the sliding arm and the driving arm; one end of the first buffer piece is connected with the sliding arm, and the other end of the first buffer piece is connected with the driving arm; and the driving arm is provided with an avoiding hole for avoiding the first buffer piece.

8. A wheelchair lift as defined in claim 5 wherein, The multi-stage connecting rod assembly comprises a first connecting rod, a second connecting rod and a third connecting rod. The first connecting rod and the second connecting rod are arranged in an upper-lower interval; one end of the first connecting rod and one end of the second connecting rod are respectively hingedly connected on different positions of the fixed seat; the other end of the first connecting rod and the other end of the second connecting rod are respectively hingedly connected on different positions of one end of the third connecting rod; the fixed end of the telescopic power piece is hingedly connected on the hinging point of the first connecting rod and the fixed seat; the movable end of the telescopic power piece is hingedly connected on the other end of the second connecting rod; and the bearing disc is hingedly connected on the other end of the third connecting rod.

9. A wheelchair lift as defined in claim 8 wherein, The third connecting rod is hingedly connected with a handrail; the handrail is movably arranged in the third connecting rod; and one end of the handrail is hingedly connected on the limiting shaft. A second buffer piece is further arranged between the handrail and the third connecting rod; the fixed end of the second buffer piece is hingedly connected on the handrail, and the movable end of the second buffer piece is hingedly connected on the third connecting rod.

10. The wheelchair lift of claim 4, wherein, The movable end of the telescopic power component is provided with a buffer elastic component.

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