Wheelchair elevator with platform side opening function

Abstract

The invention belongs to the technical field of automobile parts, and discloses a wheelchair elevator with a platform side opening function, which comprises a base assembly, a wheelchair bearing platform, two groups of driving arm assemblies, a first main arm assembly, a second main arm assembly and two groups of gas spring auxiliary arm assemblies, the driving ends of the two driving arm assemblies are in driving connection with the first upper main arm and the second upper main arm correspondingly, the two sides of the wheelchair bearing platform are rotationally connected with the first lower main arm and the second lower main arm correspondingly, and the two air spring auxiliary arm assemblies are installed on the first lower main arm and the second lower main arm correspondingly. The two sets of air spring auxiliary arm assemblies are connected with the two sides of the wheelchair bearing platform correspondingly, the first upper main arm and the first lower main arm are detachably connected through a locking assembly, and the second upper main arm and the second lower main arm are rotationally connected through a rotating assembly. The space utilization rate can be increased, the storage convenience of the tail space of an automobile is improved, and the safety and stability of the wheelchair elevator in the storage state can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile parts, and in particular relates to a wheelchair lifter with a platform side opening function. Background Art

[0002] Wheelchair lift is an important auxiliary device in welfare vehicles. It is designed for special people with limited mobility and can help them get on and off the vehicle easily. This mechanical device rotates the car seat or wheelchair out of the vehicle through the bottom mechanism and lowers it to a certain height, so that people with limited mobility can easily get on and off the vehicle without making large movements.

[0003] Existing wheelchair lifts are generally stored and installed at the rear of the car. Therefore, after the wheelchair lift is completely retracted, it will occupy a part of the storage space at the rear of the car. In particular, when in the storage state, it will interfere with the space at the rear of the car, affecting the storage operation of other items. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the present invention provides a rotary locking mechanism for a wheelchair lift, which can not only improve space utilization and the storage convenience of the rear space of a car, but also improve the safety and stability of the storage state of the wheelchair lift.

[0005] The main technical solutions adopted in the present invention are: A wheelchair lift with a platform side-opening function comprises a base assembly, a wheelchair bearing platform, and two groups of driving arm assemblies, wherein the two groups of driving arm assemblies are symmetrically installed on both sides of the base assembly, and also comprises a first main arm assembly, a second main arm assembly and two groups of gas spring auxiliary arm assemblies, wherein the first main arm assembly comprises a first upper main arm, a first lower main arm and a locking assembly, and the second main arm assembly comprises a second upper main arm, a second lower main arm and a rotating assembly, and the driving ends of the two groups of driving arm assemblies are respectively drivingly connected to the first upper main arm and the second upper main arm, and the two sides of the wheelchair bearing platform are respectively rotationally connected to the first lower main arm and the second lower main arm, and the two groups of gas spring auxiliary arm assemblies are respectively installed on the first lower main arm and the second lower main arm, and the two groups of gas spring auxiliary arm assemblies are respectively connected to the two sides of the wheelchair bearing platform, the first upper main arm and the first lower main arm are detachably connected by a locking assembly, and the second upper main arm and the second lower main arm are rotationally connected by a rotating assembly.

[0006] Preferably, the gas spring auxiliary arm assembly comprises an upper auxiliary arm, a lower auxiliary arm and a gas spring, wherein the top end of the upper auxiliary arm is rotatably mounted on the first lower main arm or the second lower main arm, the bottom end of the lower auxiliary arm is rotatably mounted on the side of the wheelchair bearing platform, the bottom end of the upper auxiliary arm is hinged to the top end of the lower auxiliary arm, the fixed end of the gas spring is mounted on the first lower main arm or the second lower main arm, and the driving end of the gas spring is connected to the upper auxiliary arm.

[0007] Preferably, the rotating assembly includes a connecting seat I, a connecting seat II, a hollow shaft, a nut and a limit locking piece. The connecting seat I is installed in the bottom end of the second upper main arm, and the connecting seat II is installed in the top end of the second lower main arm. One end of the hollow shaft passes through the connecting seat I and the connecting seat II in sequence and is locked and installed with the nut. The limit locking piece is installed at the rotating surface of the gas spring auxiliary arm assembly to limit the rotation and popping out of the gas spring auxiliary arm assembly.

[0008] Preferably, the rotating assembly also includes a gasket I, a gasket II and a sleeve, the gasket I and the gasket II are both sleeved and installed on the hollow shaft, the gasket I is located between the connecting seat I and the connecting seat II, the gasket II is located between the connecting seat II and the nut, and the sleeve is installed on the hollow shaft and is located between the inner wall surface of the connecting seat II and the outer wall surface of the hollow shaft.

[0009] Preferably, the limit locking member includes a gear shaft II, a rack stop rod II and a rotating member. The gear shaft II is rotatably installed on the second lower main arm, and a rotating member is installed at one end of the gear shaft II for rotating the gear shaft II. Through grooves are provided on the connecting seat I and the connecting seat II for limiting the installation of the rack stop rod II. The rack stop rod II is meshed and connected with the gear on the gear shaft II. When in the locked state, the rack stop rod II abuts against the rotating surface of the gas spring auxiliary arm assembly.

[0010] Preferably, the locking assembly includes a locking block, a shift rod, a guide assembly, a limit block, a gear shaft I and a rack block I, wherein the locking block is arranged on the first upper main arm, the shift rod is rotatably mounted on the first lower main arm, the guide assembly is installed in the first upper main arm, the rack block I, the gear shaft I and the limit block are all installed in the first lower main arm, the guide assembly and the limit block are both provided with a guide groove for fitting and mounting the rack block I, the guide assembly is installed in cooperation with the limit block to ensure that the guide assembly The guide groove and the guide groove on the limit block are located in the same straight line, the gear shaft I is rotatably installed on the first lower main arm, and one end of the gear shaft I is connected to the bottom end of the shift rod, and the shift rod drives the gear shaft I to rotate, and the gear shaft I is meshed with the rack lever I. The rack lever I moves up and down along the guide grooves on the guide assembly and the limit block under the drive of the gear shaft I, and the top end of the shift rod is matched with the slot on the locking block. When the rack lever I moves to the lowest position, it abuts against the rotating surface of the gas spring auxiliary arm assembly.

[0011] Preferably, the guide assembly comprises an upper guide block, a lower guide block and a connecting block, and the upper guide block is integrally connected to the lower guide block via the connecting block, a limiting slot is provided on the limit card block for being mounted in an interlocking manner with the connecting block, and the limit card block is located between the upper guide block and the lower guide block.

[0012] Preferably, the locking assembly further comprises an upper limit block, which is arranged at the top end of the guide assembly and is used to limit the top end position of the rack stop rod I.

[0013] Preferably, the locking assembly further comprises a lower limit block, which is arranged in the first lower main arm and is located below the rotating surface of the gas spring auxiliary arm assembly, and is used to limit the bottom end position of the rack stop rod I.

[0014] Beneficial effects: The present invention provides a wheelchair lift with a platform side opening function, which has the following advantages: (1) The present invention optimizes the design of the first main arm assembly and the second main arm assembly, and utilizes the locking assembly and the rotating assembly to realize the side-pull opening and closing of the wheelchair bearing platform, thereby providing more operating space for tail storage, and has a simple structure and is easy to operate.

[0015] (2) In the present invention, the side-pull locking and unlocking functions are realized by controlling the up and down movement of the rack stopper rod I. At the same time, the rack stopper rod I and the rack stopper rod II are used to limit the rotating surface of the gas spring auxiliary arm to solve the problem of automatic popping open of the gas spring auxiliary arm during the side-pull process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the overall structure of Embodiment 1 (closed state); Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 (open state); Figure 3 Schematic diagram of the structure of the gas spring auxiliary arm assembly of Example 1 (open state); Figure 4 is a schematic diagram of the overall structure of the rotating assembly of this embodiment 1; Figure 5 is a schematic diagram of a partial structure of the rotating assembly of this embodiment 1; Figure 6 is a partial cross-sectional view of the rotating assembly of the present embodiment 1; Figure 7 Schematic diagram of the structure of the locking assembly of the first embodiment (locked state); Figure 8 Schematic diagram of the structure of the locking assembly in Embodiment 1 (unlocked state); Fig. 9 Schematic diagram of the structure of the locking assembly in Embodiment 1 (disconnected state); In the figure: base assembly 1, wheelchair bearing platform 2, driving arm assembly 3, first main arm assembly 4, first upper main arm 4-1, first lower main arm 4-2, locking assembly 4-3, locking block 4-31, slot 4-311, lever 4-32, guide assembly 4-33, upper guide block 4-331, lower guide block 4-332, connecting block 4-333, limit block 4-34, limit slot 4-341, gear shaft I 4-35, rack stopper I 4-36, guide slot 4-37, upper limit block 4-38, lower Limit block 4-39, second main arm assembly 5, second upper main arm 5-1, second lower main arm 5-2, rotating assembly 5-3, connecting seat I 5-31, connecting seat II 5-32, hollow shaft 5-33, nut 5-34, gasket I 5-35, gasket II 5-36, bushing 5-37, locking limiter 5-38, gear shaft II 5-381, rack lever II 5-382, rotating member 5-383, gas spring auxiliary arm assembly 6, upper auxiliary arm 6-1, lower auxiliary arm 6-2, gas spring 6-3, rotating surface 7. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application. Example 1

[0018] like Figure 1-2 As shown, a wheelchair lift with a platform side opening function includes a base assembly 1, a wheelchair bearing platform 2, two sets of drive arm assemblies 3, the two sets of drive arm assemblies 3 are symmetrically installed on both sides of the base assembly 1, and also includes a first main arm assembly 4, a second main arm assembly 5 and two sets of gas spring auxiliary arm assemblies 6, wherein the first main arm assembly 4 includes a first upper main arm 4-1, a first lower main arm 4-2 and a locking assembly 4-3, the second main arm assembly 5 includes a second upper main arm 5-1, a second lower main arm 5-2 and a rotating assembly 5-3, and the driving ends of the two sets of drive arm assemblies 3 are respectively connected to the first main arm assembly 4, the second main arm assembly 5 and the second main arm assembly 5. An upper main arm 4-1 and a second upper main arm 5-1 are drive-connected, and the two sides of the wheelchair carrying platform 2 are rotationally connected to the first lower main arm 4-2 and the second lower main arm 5-2 respectively. Two groups of gas spring auxiliary arm assemblies 6 are respectively installed on the first lower main arm 4-2 and the second lower main arm 5-2, and the two groups of gas spring auxiliary arm assemblies 6 are respectively connected to the two sides of the wheelchair carrying platform 2, the first upper main arm 4-1 and the first lower main arm 4-2 are detachably connected by the locking assembly 4-3, and the second upper main arm 5-1 and the second lower main arm 5-2 are rotationally connected by the rotating assembly 5-3.

[0019] Below, reference Figure 1 and Figure 3 , while explaining the structure of the gas spring auxiliary arm assembly 6.

[0020] The gas spring auxiliary arm assembly 6 includes an upper auxiliary arm 6-1, a lower auxiliary arm 6-2 and a gas spring 6-3, wherein the top end of the upper auxiliary arm 6-1 is rotatably mounted on the first lower main arm 4-2 or the second lower main arm 5-2, the bottom end of the lower auxiliary arm 6-2 is rotatably mounted on the side of the wheelchair bearing platform 2, the bottom end of the upper auxiliary arm 6-1 is hinged to the top end of the lower auxiliary arm 6-2, the fixed end of the gas spring 6-3 is mounted on the first lower main arm 4-2 or the second lower main arm 5-2, and the driving end of the gas spring 6-3 is connected to the upper auxiliary arm 6-1.

[0021] In this embodiment 1, when the wheelchair carrying platform 2 is in the storage state, Figure 1 As shown, the hinge of the lower auxiliary arm 6-2 and the upper auxiliary arm 6-1 always abuts against the driving arm assembly 3, and at this time, the gas spring 6-3 is in a contracted state. If the hinge of the lower auxiliary arm 6-2 and the upper auxiliary arm 6-1 is separated from the driving arm assembly 3, the gas spring 6-3 will extend according to the preset pressure, and then the lower auxiliary arm 6-2 and the upper auxiliary arm 6-1 will be opened, so as to realize the flipping of the wheelchair bearing platform 2.

[0022] Below, reference Figure 4-Figure 6 (The outer shell of the second main arm assembly 5 is not drawn), and the structure of the rotating assembly 5-3 is explained.

[0023] The rotating assembly 5-3 includes a connecting seat I 5-31, a connecting seat II 5-32, a hollow shaft 5-33, a nut 5-34 and a locking limiter 5-38. The connecting seat I 5-31 is installed in the bottom end of the second upper main arm 5-1, and the connecting seat II 5-32 is installed in the top end of the second lower main arm 5-2. One end of the hollow shaft 5-33 passes through the connecting seat I 5-31 and the connecting seat II 5-32 in sequence and is locked and installed with the nut 5-34. The limit locking member 5-38 is installed on the rotating surface of the gas spring auxiliary arm assembly 6 to limit the rotation and popping out of the gas spring auxiliary arm assembly 6.

[0024] In the side pulling process, the connecting seat II 5-32 rotates around the hollow shaft 5-33. In this embodiment 1, in order to reduce the friction and wear between the hollow shaft 5-33 and the connecting seat II 5-32, a sleeve 5-37 is provided between the inner wall surface of the connecting seat II 5-32 and the outer wall surface of the hollow shaft 5-33. Figure 6 At the same time, in order to adjust the fastening force of the connection and realize the gap compensation, in this embodiment 1, a gasket I5-35 is arranged between the connection seat I5-31 and the connection seat II5-32, and a gasket II5-36 is arranged between the connection seat II5-32 and the nut 5-34.

[0025] In this embodiment 1, in order to limit the rotation and ejection of the gas spring auxiliary arm assembly 6, the limit locking member 5-38 is set at the rotation surface of the gas spring auxiliary arm assembly 6. The limit locking member 5-38 can be but is not limited to the following structures, and the existing structures that can achieve the locking and limiting of the gas spring auxiliary arm assembly 6 are applicable Since the gas spring auxiliary arm assembly 6 is installed on the second lower main arm 5-2, during the side-pulling rotation, the hinges of the lower auxiliary arm 6-2 and the upper auxiliary arm 6-1 will be separated from the drive arm assembly 3, so the gas spring 6-3 will open due to the loss of abutment pressure.

[0026] In the present invention, the limiting locking member 5-38 can be but is not limited to the following structures: like Figure 4 and 5 As shown, the limit locking member 5-38 includes a gear shaft II 5-381, a rack stop rod II 5-382 and a rotating member 5-383. The gear shaft II 5-381 is rotatably installed on the second lower main arm 5-1, and a rotating member 5-383 is installed at one end of the gear shaft II 5-381 for rotating the gear shaft II 5-381. Through grooves are provided on the connecting seat I 5-31 and the connecting seat II 5-32 for limiting the installation of the rack stop rod II 5-382. The rack stop rod II 5-382 is meshedly connected with the gear on the gear shaft II 5-381. When in the locked state, the rack stop rod II 5-382 abuts against the rotating surface 7 of the gas spring auxiliary arm assembly 6.

[0027] In this embodiment 1, the rotating part 5-383 can be a manually adjustable or automatically adjustable handwheel, and any existing handwheel that can drive the gear shaft II 5-381 to rotate can be applicable.

[0028] In this embodiment 1, when the wheelchair supporting platform 2 needs to be pulled sideways to open, the spring auxiliary arm assembly 6 needs to be locked, and the gear shaft II 5-381 is controlled by the rotating member 5-383 to drive the rack stopper II 5-382 to move downward until the bottom end of the rack stopper II 5-382 abuts against the rotating surface 7 of the gas spring auxiliary arm assembly 6 (the rotating surface is the rotating surface where the upper auxiliary arm 6-1 in the spring auxiliary arm assembly 6 is rotatably connected to the second lower main arm 5-2), and the top end is separated from the connecting seat I 5-31 in the second upper main arm 5-1. At this time, the rack stopper II 5-382 limits the rotation space of the rotating surface, so that the spring auxiliary arm assembly 6 is always in the storage state.

[0029] In this embodiment 1, the through grooves opened on the connecting seat Ⅰ5-31 and the connecting seat Ⅱ5-32 cooperate with the external shell of the second main arm assembly 5 to limit the rack guard rod Ⅱ5-382, so that the rack guard rod Ⅱ5-382 only moves vertically up and down along the through grooves.

[0030] Below, reference Figure 7 - Fig. 9 (The outer shell of the first main arm assembly 4 is not drawn), and the structure of the locking assembly 4-3 is explained.

[0031] In this embodiment 1, the locking assembly 4-3 includes a locking card block 4-31, a lever 4-32, a guide assembly 4-33, a limit card block 4-34, a gear shaft I 4-35 and a rack block I 4-36, wherein the locking card block 4-31 is arranged on the first upper main arm 4-1, the lever 4-32 is rotatably mounted on the first lower main arm 4-2, the guide assembly 4-33 is installed in the first upper main arm 4-1, the rack block I 4-36, the gear shaft I 4-35 and the limit card block 4-34 are all installed in the first lower main arm 4-2, and the guide assembly 4-33 and the limit card block 4-34 are both provided with a guide groove 4-37 for fitting and installing the rack block I 4-36. The guide assembly 4-33 is installed in cooperation with the limit card block 4-34 to ensure that the guide assembly 4- The guide groove 4-37 on the first lower main arm 4-2 and the guide groove 4-37 on the limit block 4-34 are located in the same straight line in the locked state, the gear shaft I 4-35 is rotatably installed on the first lower main arm 4-2, and one end of the gear shaft I 4-35 is connected to the bottom end of the lever 4-32, and the lever 4-32 drives the gear shaft I 4-35 to rotate, the gear shaft I 4-35 is meshed and installed with the rack bar I 4-36, and the rack bar I 4-36 moves up and down along the guide groove 4-37 on the guide assembly 4-33 and the limit block 4-34 under the drive of the gear shaft I 4-35, the top end of the lever 4-32 is matched with the card groove 4-311 on the locking card block 4-31, and when the rack bar I 4-36 moves to the lowest position, it abuts against the rotating surface of the gas spring auxiliary arm assembly 6. The rotating surface is the rotating surface of the upper auxiliary arm 6-1 in the spring auxiliary arm assembly 6 and the first lower main arm 4-2. When the rack stop rod Ⅰ4-36 abuts against the rotating surface 7, the rotation space of the rotating surface is limited, so that the upper auxiliary arm 6-1 cannot rotate even under the pressure of the gas spring. Even if the spring auxiliary arm assembly 6 is separated from the drive arm assembly 3, the gas spring is still in a compressed state, and the spring auxiliary arm assembly cannot flip the wheelchair supporting platform 2. The wheelchair supporting platform 2 is always in a stored state during the side pulling process.

[0032] In this embodiment 1, Figure 7 As shown, when the locking assembly 4-3 is in the closed state, the guide groove 4-37 on the guide assembly 4-33 and the guide groove 4-37 on the limit block 4-34 are located in the same straight line, and the width of the guide groove 4-37 is set according to the width of the rack stopper I 4-36, which is used to engage the rack stopper I 4-36. The guide groove 4-37 cooperates with the outer shell of the first main arm assembly 4 to limit the rack stopper I 4-36, so that the rack stopper I 4-36 only moves vertically up and down along the guide groove 4-37.

[0033] In order to further enhance the stability of the locking assembly 4-3 and improve the matching accuracy between the guide assembly 4-33 and the limit block 4-34, the present embodiment 1 can, but is not limited to, adopt the following structure of the guide assembly 4-33 to limit the rack stopper I 4-36 while realizing the engagement and positioning of the limit block 4-34. Fig. 9 As shown, the guide assembly 4-33 in this embodiment 1 includes an upper guide block 4-331, a lower guide block 4-332, and a connecting block 4-333, and the upper guide block 4-331 and the lower guide block 4-332 are integrally connected through the connecting block 4-333, and a limiting slot 4-341 is provided on the limiting block 4-34 for being fitted with the connecting block 4-333, and the limiting block 4-34 is located between the upper guide block 4-331 and the lower guide block 4-332. The limiting block 4-34 is fitted with the connecting block 4-333 through the limiting slot 4-341, thereby limiting the limiting block 4-34 in the left and right directions, and at the same time, the upper guide block 4-331 and the lower guide block 4-332 cooperate to limit the limiting block 4-34 in the up and down directions, which greatly improves the fitting accuracy of the limiting block 4-34.

[0034] like Figure 8 As shown, in Example 1, the locking assembly 4-3 also includes an upper limit block 4-38, which is arranged at the top end of the guide assembly 4-33 and is used to limit the top end position of the rack stopper I 4-36. The upper limit block is generally made of rubber material. On the one hand, the upper limit block 4-38 can limit the movement position of the rack stopper I 4-36. On the other hand, since there may be gaps in the structure where the rack stopper I 4-36 is limited and installed, the limit block 4-38 is made of rubber material with certain elasticity and compressibility, which can fill these gaps and achieve tightness and stability of the connection.

[0035] like Figure 8 As shown, in this embodiment 1, the locking assembly 4-3 also includes a lower limit block 4-39, which is arranged in the first lower main arm 4-2 and is located below the rotating surface of the gas spring auxiliary arm assembly 6, and is used to limit the bottom position of the rack stopper rod I 4-36. The lower limit block 4-39 is generally made of metal material, and is used to limit the lowest movement position of the rack stopper rod I 4-36 to prevent the rack stopper rod I 4-36 from falling. In this embodiment 1, the lower limit block 4-39 is installed on the rotating surface of the gas spring auxiliary arm assembly 6 where the upper auxiliary arm 6-1 is rotatably connected to the first lower main arm 4-2, as shown in FIG. Figure 8 shown.

[0036] In the present invention, corresponding upper limit blocks and lower limit blocks can also be set above and below the rack stop rod II 5-382 in the limit locking member 5-38 according to needs.

[0037] The working principle of the present invention is as follows: When the wheelchair carrying platform 2 needs to be stored and locked, the lever 4-32 is rotated upward, thereby driving the gear shaft I4-35 to rotate, and the gear meshing drives the rack lever I4-36 to move upward until the top of the rack lever I4-36 reaches the upper limit block 4-38. Figure 7 As shown, at this time, the limit block 4-34 is embedded in the guide assembly 4-33, and the rack located in the first lower main arm 4-2 extends into the guide groove 4-37 of the guide assembly 4-33 on the first upper main arm 4-1, thereby realizing the relative locking between the first upper main arm 4-1 and the first lower main arm 4-2. At the same time, in the gas spring auxiliary arm assembly 6, the hinge of the upper auxiliary arm 6-1 and the lower auxiliary arm 6-2 is always in contact with the driving arm assembly 3, preventing the wheelchair bearing platform 2 from turning outward. Finally, the lever 4-32 is dialed into the slot 4-311 of the locking block 4-31, and the storage locking of the wheelchair bearing platform 2 is completed.

[0038] When the wheelchair carrying platform 2 needs to be pulled sideways to open, it is only necessary to pull the lever 4-32 out of the slot 4-311 and rotate it downward, thereby driving the gear shaft I 4-35 to rotate, and driving the rack stopper I 4-36 to move downward through the gear meshing, until the bottom end of the rack stopper I 4-36 reaches the lower limit block 4-39. At this time, Figure 8 As shown, the upper end of the rack stopper rod I 4-36 is disengaged from the first upper main arm 4-1 (exiting the guide groove 4-37 of the upper guide block 4-331), and the bottom end of the rack stopper rod I 4-36 abuts against the rotating surface where the upper auxiliary arm 6-1 and the first lower main arm 4-2 are hinged, preventing the upper auxiliary arm 6-1 from rotating upward, so that the gas spring auxiliary arm assembly 6 is always in a compressed state, that is, the wheelchair carrying platform 2 is always in a stored state. At the same time, when the second upper main arm 5-1 and the second lower main arm 5-2 rotate relative to each other through the rotating assembly 5-3, the rack stopper rod II 5-382 is driven downward by the rotating member 5-383 and the gear shaft II 5-381, and abuts against the rotating surface where the upper auxiliary arm 6-1 and the second lower main arm 5-2 are hinged, so that the gas spring auxiliary arm assembly 6 on this side is always in a compressed state, that is, the side pull opening of the wheelchair carrying platform 2 is completed, as shown in FIG. Fig. 9 shown.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wheelchair lift with a platform side opening function, comprising a base assembly, a wheelchair bearing platform, and two sets of drive arm assemblies, wherein the two sets of drive arm assemblies are symmetrically mounted on both sides of the base assembly, characterized in that: The wheelchair-supporting platform is a first main arm assembly, a second main arm assembly and two groups of gas spring auxiliary arm assemblies, wherein the first main arm assembly includes a first upper main arm, a first lower main arm and a locking assembly, and the second main arm assembly includes a second upper main arm, a second lower main arm and a rotating assembly. The driving ends of the two groups of driving arm assemblies are respectively drivingly connected to the first upper main arm and the second upper main arm, and the two sides of the wheelchair-supporting platform are respectively rotationally connected to the first lower main arm and the second lower main arm. The two groups of gas spring auxiliary arm assemblies are respectively installed on the first lower main arm and the second lower main arm, and the two groups of gas spring auxiliary arm assemblies are respectively connected to the two sides of the wheelchair-supporting platform, the first upper main arm and the first lower main arm are detachably connected by a locking assembly, and the second upper main arm and the second lower main arm are rotationally connected by a rotating assembly.

2. The wheelchair lift with platform side opening function according to claim 1, characterized in that: The gas spring auxiliary arm assembly includes an upper auxiliary arm, a lower auxiliary arm and a gas spring, wherein the top end of the upper auxiliary arm is rotatably mounted on the first lower main arm or the second lower main arm, the bottom end of the lower auxiliary arm is rotatably mounted on the side of the wheelchair bearing platform, the bottom end of the upper auxiliary arm is hinged to the top end of the lower auxiliary arm, the fixed end of the gas spring is mounted on the first lower main arm or the second lower main arm, and the driving end of the gas spring is connected to the upper auxiliary arm.

3. The wheelchair lift with platform side opening function according to claim 1 or 2, characterized in that: The rotating assembly includes a connecting seat I, a connecting seat II, a hollow shaft, a nut and a limit locking piece. The connecting seat I is installed in the bottom end of the second upper main arm, and the connecting seat II is installed in the top end of the second lower main arm. One end of the hollow shaft passes through the connecting seat I and the connecting seat II in sequence and is locked and installed with the nut. The limit locking piece is installed at the rotating surface of the gas spring auxiliary arm assembly to limit the rotation and popping out of the gas spring auxiliary arm assembly.

4. The wheelchair lift with platform side opening function according to claim 3, characterized in that: The rotating assembly also includes a gasket I, a gasket II and a sleeve. The gasket I and the gasket II are both sleeved and installed on the hollow shaft. The gasket I is located between the connecting seat I and the connecting seat II. The gasket II is located between the connecting seat II and the nut. The sleeve is installed on the hollow shaft and is located between the inner wall surface of the connecting seat II and the outer wall surface of the hollow shaft.

5. The wheelchair lift with platform side opening function according to claim 3, characterized in that: The limit locking component includes a gear shaft II, a rack stop rod II and a rotating component. The gear shaft II is rotatably installed on the second lower main arm, and a rotating component is installed at one end of the gear shaft II for rotating the gear shaft II. Through grooves are provided on the connecting seat I and the connecting seat II for limiting the installation of the rack stop rod II. The rack stop rod II is meshed and connected with the gear on the gear shaft II. When in the locked state, the rack stop rod II abuts against the rotating surface of the gas spring auxiliary arm assembly.

6. The wheelchair lift with platform side opening function according to claim 1 or 2, characterized in that: The locking assembly includes a locking block, a lever, a guide assembly, a limit block, a gear shaft I and a rack block I, wherein the locking block is arranged on the first upper main arm, the lever is rotatably mounted on the first lower main arm, the guide assembly is mounted in the first upper main arm, the rack block I, the gear shaft I and the limit block are all mounted in the first lower main arm, the guide assembly and the limit block are both provided with a guide groove for engaging and mounting the rack block I, the guide assembly is installed in cooperation with the limit block to ensure that the guide on the guide assembly The groove and the guide groove on the limit block are located in the same straight line, the gear shaft I is rotatably installed on the first lower main arm, and one end of the gear shaft I is connected to the bottom end of the shift rod, and the gear shaft I is driven by the shift rod to rotate, the gear shaft I is meshed with the rack lever I, and the rack lever I moves up and down along the guide grooves on the guide assembly and the limit block under the drive of the gear shaft I, the top end of the shift rod is matched with the slot on the locking block, and when the rack lever I moves to the lowest position, it abuts against the rotating surface of the gas spring auxiliary arm assembly.

7. The wheelchair lift with platform side opening function according to claim 6, characterized in that: The guide assembly includes an upper guide block, a lower guide block, and a connecting block, and the upper guide block is integrally connected to the lower guide block through the connecting block. A limiting groove is provided on the limit card block for being embedded and installed with the connecting block. The limit card block is located between the upper guide block and the lower guide block.

8. The wheelchair lift with platform side opening function according to claim 6, characterized in that: The locking assembly also includes an upper limit block, which is arranged at the top end of the guide assembly and is used to limit the top end position of the rack stop rod I.

9. The wheelchair lift with platform side opening function according to claim 6, characterized in that: The locking assembly also includes a lower limit block, which is arranged in the first lower main arm and is located below the rotating surface of the gas spring auxiliary arm assembly, and is used to limit the bottom end position of the rack stop rod I.

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