Wheelchair elevator

Abstract

The wheelchair lifter comprises an outer frame, a lifting driving mechanism, a shear arm set, a wheelchair bearing platform, a rear turnover plate and an automatic turnover mechanism, the shear arm set comprises a main shear arm and a pair of auxiliary shear arms, the rear turnover plate is hinged to the side, close to the outer frame, of the wheelchair bearing platform, and a sliding groove is formed in one side of the wheelchair bearing platform; the automatic turnover mechanism comprises a connecting piece, a guide rod, a linear guide rail, a spring and a roller, one end of the connecting piece is hinged to the rear turnover plate, the other end of the connecting piece is fixed to the guide rod, the guide rod is in sliding connection with the linear guide rail, one end of the guide rod is fixedly provided with a limiting piece, and the guide rod is sleeved with the spring; the two ends of the spring abut against the limiting piece and the linear guide rail correspondingly. The roller is hinged to one end of the main shear arm and is arranged in the sliding groove in a sliding connection mode. The automatic turnover mechanism of the wheelchair elevator has the advantages of being simple in structure, convenient to produce and not prone to faults.

Description

Technical Field

[0001] This utility model relates to the field of lifting technology, and in particular to a wheelchair lifting mechanism. Background Technology

[0002] The wheelchair lift includes an outer frame, a scissor arm assembly, a wheelchair carrying platform, a rear tilting plate, and an automatic tilting mechanism. The scissor arm assembly, wheelchair carrying platform, rear tilting plate, and automatic tilting mechanism are moved out from within the outer frame. The scissor arm assembly drives the wheelchair carrying platform to rise and fall. The rear tilting plate is hinged to the side of the wheelchair carrying platform closest to the outer frame, and its position is controlled by the automatic tilting mechanism. During the raising and lowering process, the rear tilting plate remains vertical under the action of the automatic tilting mechanism to prevent the wheelchair from slipping off the platform. When the wheelchair carrying platform rises to be flush with the vehicle's floor, the rear tilting plate tilts to a horizontal position under the action of the automatic tilting mechanism, serving as a transition between the wheelchair carrying platform and the vehicle's floor.

[0003] The existing automatic tilting mechanism of a wheelchair lift includes a pressure block, a rotating block, two tie rods, and a sliding block. The pressure block is fixed to the auxiliary scissor arm and rotates synchronously with it. The rotating block is fixed to the side plate of the main panel, and the contact surfaces of the pressure block and the rotating block mate. One end of each tie rod is connected to the sliding block, and the other end is hinged to the automatic tilting mechanism and the rotating block, respectively. The existing automatic tilting mechanism of the wheelchair lift is too complex and prone to malfunction, requiring improvement. Utility Model Content

[0004] The purpose of this utility model is to propose a wheelchair lift with a simple structure, easy to manufacture and less prone to failure, for an automatic flipping mechanism for the rear flip plate.

[0005] This utility model discloses a wheelchair lift, including an outer frame, a lifting drive mechanism, a scissor arm assembly, a wheelchair support platform, a rear tilting plate, and an automatic tilting mechanism. The scissor arm assembly includes a main scissor arm and a pair of auxiliary scissor arms. The rear tilting plate is hinged to the side of the wheelchair support platform near the outer frame. A sliding groove is formed on one side of the wheelchair support platform. The automatic tilting mechanism includes a connector, a guide rod, a linear guide rail, a spring, and rollers. The linear guide rail is fixedly installed on one side of the wheelchair support platform and located between the sliding groove and the rear tilting plate. One end of the connector is hinged to the rear flap, and the other end of the connector is fixed to the guide rod. The guide rod is slidably connected to the linear guide rail. One end of the guide rod is fixedly set to form a limiting member. The spring is sleeved around the guide rod, and the two ends of the spring abut against the limiting member and the linear guide rail, respectively. The rear flap remains perpendicular to the wheelchair support platform under the action of the spring. The roller is hinged to one end of the main scissor arm and slidably connected in the sliding groove. The main scissor arm can drive the roller to slide to abut against the limiting member and compress the spring.

[0006] Preferably, the connecting member is a steel wire rope, and a torsion spring is provided between the rear flip plate and the wheelchair support platform, so that the rear flip plate flips to a horizontal state under the action of the torsion spring.

[0007] Preferably, the surface of the linear guide rail is provided with a sliding hole, and the guide rod passes through the sliding hole.

[0008] Preferably, the surface of the guide rod is provided with threads, and the limiting member is threadedly connected to the guide rod.

[0009] Preferably, the end of the guide rod near the roller is threadedly connected with an abutment nut.

[0010] Preferably, the guide rod has a mounting screw hole at one end near the wire rope, and a mounting screw is fixedly provided at the end of the wire rope, with the mounting screw threadedly connected to the mounting screw hole.

[0011] Preferably, the length of the mounting screw is set to "L" and meets the requirement of 100mm. <L<200mm。

[0012] Preferably, a hinge is provided at the end of the wire rope away from the guide rod, and a hinge handle is fixedly provided on one side of the rear flap. A first hinge hole is formed in the hinge, and a second hinge hole is formed in the hinge handle. A pin passes through the first hinge hole and the second hinge hole.

[0013] As can be seen from the above description of this utility model, this utility model has the following beneficial effects:

[0014] 1. The automatic tilting mechanism of this wheelchair lift consists of a wire rope, a guide rod, a linear guide rail, a spring, and rollers. When not in the vehicle entry / exit state, the guide rod, under the action of the spring force, causes the wire rope to pull the rear tilting plate to a vertical state, thereby acting as a barrier for the wheelchairs on the wheelchair carrying platform. When in the vehicle entry / exit state, the rollers abut against the guide rod, rendering the spring inactive, and the rear tilting plate can then tilt to overlap the floor inside the vehicle. The automatic tilting mechanism of this wheelchair lift has a simple structure, is easy to manufacture, and is not prone to failure.

[0015] 2. A thread is formed on the surface of the guide rod, and a limiting component is threadedly connected to the guide rod, so that the position of the limiting component threadedly connected to the guide rod is adjustable. This allows for adjustment of the spring's deformation, so that the spring obtains a suitable amount of elastic force to just enough to flip up the rear flap.

[0016] 3. An installation screw is fixedly installed at one end of the wire rope, and an installation screw hole is formed at the end of the guide rod, so that the installation screw is threaded and fixed in the installation screw hole; the overall length of the wire rope and the guide rod can be adjusted by adjusting the depth of the threaded connection of the installation screw in the installation screw hole, so that the wire rope is in a good tension. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a wheelchair lift in a non-entering / exiting vehicle state according to an embodiment;

[0018] Figure 2 This is a schematic diagram of a wheelchair lift entering and exiting a vehicle according to an embodiment;

[0019] Figure 3 This is a schematic diagram of the automatic tilting mechanism when the vehicle is not in the entry or exit state of the embodiment;

[0020] Figure 4 This is a schematic diagram of the automatic flipping mechanism when entering or leaving the vehicle in an embodiment.

[0021] Figure 5 This is a schematic diagram of the linear guide and sliding hole in the embodiment;

[0022] Figure 6 This is a partial structural schematic diagram of the automatic flipping mechanism in the embodiment;

[0023] Figure 7 This is a schematic diagram of the mounting screw and mounting screw hole in an embodiment;

[0024] Figure 8 This is a schematic diagram of the structure of the hinge handle, hinge member, and pin in the embodiment.

[0025] Reference numerals: 1. Outer frame; 11. Crossbeam; 2. Scissor arm assembly; 21. Main scissor arm; 22. Secondary scissor arm; 3. Wheelchair support platform; 31. Sliding groove; 4. Rear flip plate; 41. Torsion spring; 42. Hinge handle; 421. Second hinge hole; 43. Pin; 5. Automatic tilting mechanism; 51. Connector; 511. Mounting screw; 52. Guide rod; 521. Thread; 522. Mounting screw hole; 53. Linear guide rail; 531. Sliding hole; 54. Spring; 55. Roller; 56. Limiting component; 57. Abutment nut; 58. Hinge component; 581. First hinge hole; 6. Lifting drive mechanism; 7. Interior floor. Detailed Implementation

[0026] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer and more understandable, the following description is provided in conjunction with the appendix. Figure 1-8The present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0027] Reference Figure 1 and Figure 2 A wheelchair lift includes an outer frame 1, a lifting drive mechanism 6, a scissor arm assembly 2, a wheelchair support platform 3, a rear tilting plate 4, and an automatic tilting mechanism 5. A pair of crossbeams 11 are slidably disposed within the outer frame 1. The scissor arm assembly 2 includes a main scissor arm 21 and a pair of auxiliary scissor arms 22. One end of the main scissor arm 21 is slidably connected to the wheelchair support platform 3. The lifting drive mechanism 6 drives the main scissor arm 21 to rotate, thereby raising and lowering the wheelchair support platform 3. During the raising and lowering process, relative sliding occurs between the main scissor arm 21 and the wheelchair support platform 3. The two auxiliary scissor arms 22 are designated as a first auxiliary scissor arm 22 and a second auxiliary scissor arm 22. One end of each auxiliary scissor arm 22 is hinged to the middle position of the main scissor arm 21. The other end of the first auxiliary scissor arm 22 is slidably connected to the crossbeams 11, and the other end of the first auxiliary scissor arm 22 is hinged to the wheelchair support platform 3.

[0028] Reference Figure 2 , Figure 3 and Figure 4 The scissor arm assembly 2 and the wheelchair support platform 3 can be slidably hidden inside the outer frame 1 via the crossbeam 11. After the scissor arm assembly 2 and the wheelchair support platform 3 are removed from the outer frame 1, the wheelchair support platform 3 can be raised and lowered under the action of the scissor arm. The rear flip plate 4 is hinged to the side of the wheelchair support platform 3 closest to the outer frame 1, and a torsion spring 41 is provided between the rear flip plate 4 and the wheelchair support platform 3. When the wheelchair support platform 3 is located inside the outer frame 1, the rear flip plate 4 is in contact with the surface of the wheelchair support platform 3, and the position of the rear flip plate 4 is controlled by the automatic flipping mechanism 5.

[0029] Reference Figure 3 , Figure 4 and Figure 5The automatic tilting mechanism 5 includes a connector 51, a guide rod 52, a linear guide rail 53, a spring 54, and rollers 55. The connector 51 is a steel wire rope, with one end hinged to one side of the rear tilting plate 4 and the other end fixed to one end of the guide rod 52. The linear guide rail 53 is fixedly mounted on one side of the wheelchair support platform 3, and a sliding hole 531 is formed along the length of the linear guide rail 53. The guide rod 52 passes through the sliding hole 531 of the linear guide rail 53, allowing the guide rod 52 to slide against the linear guide rail 53. The spring 54 is sleeved around the guide rod 52, and a limiting member 56 is fixedly mounted on the guide rod 52, so that both ends of the spring 54 abut against the limiting member 56 and the linear guide rail 53, respectively. When not entering or leaving the vehicle, the guide rod 52 moves away from the rear flip plate 4 under the action of the spring 54, thereby flipping the rear flip plate 4 upward through the steel wire rope to a state perpendicular to the wheelchair support platform 3; the rear flip plate 4 in the vertical state acts as a barrier for the wheelchair on the wheelchair support platform 3.

[0030] A sliding groove 31 is formed on one side of the wheelchair support platform 3 where the linear guide rail 53 is located, so that the linear guide rail 53 is located between the sliding groove 31 and the rear flip plate 4. The roller 55 is embedded in the sliding groove 31 and fixed to the end of the main scissor arm 21. As the scissor arm assembly 2 drives the wheelchair support platform 3 to rise and fall, the roller 55 slides in the sliding groove 31. When the wheelchair enters the wheelchair support platform 3, the roller 55 slides towards the guide rod 52 as the wheelchair support platform 3 rises. When the wheelchair support platform 3 rises to a certain height, the roller 55 abuts against the end of the guide rod 52. As the wheelchair support platform 3 continues to rise, the roller 55 pushes the guide rod 52 towards the rear flip plate 4 and gradually compresses the spring 54. At this time, the wire rope no longer exerts tension on the rear flip plate 4. Under the action of the torsion spring 41, the rear flip plate 4 flips over and rests on the vehicle floor 7, thereby facilitating the wheelchair to enter the wheelchair support platform 3 from the vehicle floor 7. When the wheelchair support platform 3 descends, the rollers 55 move away from the guide rod 52, so that the rollers 55 and the guide rod 52 no longer abut. Under the action of the spring 54, the steel cable drives the rear flip plate 4 to flip up again until it is perpendicular to the wheelchair support platform 3, so that the rear flip plate 4 can act as a barrier for the wheelchair on the wheelchair support platform 3.

[0031] Reference Figure 6, in order to make the elastic force of the spring 54 have a good driving effect on the guide rod 52, a thread 521 is provided on the surface of the end of the guide rod 52 away from the wire rope. Thus, the limiting member 56 and the guide rod 52 can be connected by the thread 521. Since the two ends of the spring 54 are respectively abutted against the limiting member 56 and the linear guide 53, by adjusting the position of the limiting member 56 connected by the thread 521 on the guide rod 52, the deformation degree of the spring 54 can be adjusted, so that the spring 54 can drive the rear flap 4 to flip to an appropriate angle. When the roller 55 abuts against the guide rod 52, in order to make the roller 55 and the guide rod 52 have a good abutting effect, a abutting nut 57 is threadedly connected to the thread 521 at the end of the guide rod 52 close to the roller 55. The setting of the abutting nut 57 increases the contact area with the roller 55; and connecting the abutting nut 57 and the guide rod 52 by the thread 521 has the advantage of being easy to disassemble.

[0032] Refer to Figure 7 , in addition, in order to make the wire rope achieve a good tensioning effect, a mounting screw 511 is fixedly provided at the end of the wire rope close to the guide rod 52. Correspondingly, a mounting screw hole 522 is formed by opening at the end of the guide rod 52. The mounting screw 511 is threadedly connected into the mounting screw hole 522. By adjusting the threaded connection depth of the mounting screw 511 in the mounting screw hole 522, the overall length of the wire rope and the guide rod 52 can be adjusted. Thus, not only the connection between the wire rope and the guide rod 52 is firm, but also the tension of the wire rope is easy to adjust. The length dimension of the mounting screw 511 is set to "L", and the length dimension of the wire rope is made to satisfy 100mm < L < 200mm, thereby ensuring the adjustment range of the overall length of the wire rope and making the wire rope in an appropriate tension after adjustment.

[0033] Refer to Figure 8 , in order to make the end of the wire rope away from the guide rod 52 achieve an articulated effect with the rear flap 4, an articulated member 58 is fixedly provided at the end of the wire rope away from the mounting screw 511. The articulated member 58 is in a "U" shape, and a first articulated hole 581 is formed by opening on the surface of the articulated member 58. Correspondingly, an articulated handle 42 is provided on one side of the rear flap 4, and a second articulated hole 421 is formed by opening on the surface of the articulated handle 42. The articulated handle 42 is snap-fitted into the "U" - shaped articulated member 58, and the first articulated hole 581 on the surface of the articulated member 58 corresponds to the second articulated hole 421 on the surface of the articulated handle 42, and a pin shaft 43 is inserted into the first articulated hole 581 and the second articulated hole 421, thereby realizing the articulation between the wire rope and the rear flap 4.

[0034] The specific implementation principle of this application embodiment is as follows: When not entering or exiting the vehicle, the spring 54 applies a force to the guide rod 52 in the direction of the roller 55, thereby driving the rear flip plate 4 to flip to a state perpendicular to the wheelchair support platform 3 via the steel wire rope. As the wheelchair support platform 3 rises, the roller 55 slides in the sliding groove 31 in the direction of the guide rod 52 until the roller 55 abuts against the abutting nut 57 at the end of the guide rod 52. As the wheelchair support platform 3 continues to rise, the limiting member 56 on the guide rod 52 gradually compresses the spring 54, so that the spring 54 no longer exerts a force on the guide rod 52 in the direction of the roller 55, and the steel wire rope no longer pulls the rear flip plate 4. At this time, the rear flip plate 4 flips to a horizontal state under the action of the torsion spring 41 and rests on the surface of the vehicle floor 7, so that the wheelchair inside the vehicle can smoothly drive onto the wheelchair support platform 3.

[0035] As the wheelchair support platform 3 descends, the rollers 55 move away from the guide rod 52, so that the rollers 55 are no longer in contact with the abutment nut 57 at the end of the guide rod 52. At this time, the guide rod 52 moves back towards the rollers 55 under the elastic force of the spring 54, and pulls the rear flip plate 4 to a vertical position via the wire rope, thereby acting as a barrier for the wheelchair on the wheelchair support platform 3 and preventing the wheelchair from slipping off the wheelchair barrier platform. The automatic tilting mechanism 5 of this wheelchair lift has a simple structure, is easy to manufacture, and is not prone to failure.

[0036] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, shall be protected by the present invention.

Claims

1. A wheelchair lift, characterized in that: It includes an outer frame, a lifting drive mechanism, a scissor arm assembly, a wheelchair carrying platform, a rear flip plate, and an automatic tilting mechanism. The scissor arm assembly includes a main scissor arm and a pair of auxiliary scissor arms. The rear flip plate is hinged to the side of the wheelchair carrying platform near the outer frame. A sliding groove is formed on one side of the wheelchair carrying platform. The automatic tilting mechanism includes a connector, a guide rod, a linear guide rail, a spring, and rollers. The linear guide rail is fixedly installed on one side of the wheelchair support platform and located between the sliding groove and the rear tilting plate. One end of the connector is hinged to the rear tilting plate, and the other end of the connector is fixed to the guide rod. The guide rod is slidably connected to the linear guide rail. One end of the guide rod is fixedly provided to form a limiting member. The spring is sleeved around the guide rod, and both ends of the spring abut against the limiting member and the linear guide rail, respectively. The rear flap remains perpendicular to the wheelchair support platform under the action of the spring. The roller is hinged to one end of the main scissor arm and is slidably connected in the sliding groove. The main scissor arm can drive the roller to slide to abut against the limiting member and compress the spring.

2. The wheelchair lift according to claim 1, characterized in that: The connecting component is a steel wire rope, and a torsion spring is provided between the rear flip plate and the wheelchair support platform. The rear flip plate flips to a horizontal state under the action of the torsion spring.

3. A wheelchair lift according to claim 1, characterized in that: The linear guide rail has a sliding hole formed on its surface, and the guide rod passes through the sliding hole.

4. A wheelchair lift according to claim 1, characterized in that: The guide rod has a threaded surface, and the limiting member is threadedly connected to the guide rod.

5. A wheelchair lift according to claim 4, characterized in that: The end of the guide rod near the roller is threaded with an abutment nut.

6. A wheelchair lift according to claim 2, characterized in that: The guide rod has a mounting screw hole at one end near the wire rope, and a mounting screw is fixedly installed at the end of the wire rope. The mounting screw is threadedly connected to the mounting screw hole.

7. A wheelchair lift according to claim 6, characterized in that: The length of the mounting screw is set to "L" and must be 100mm. <L<200mm。 8. A wheelchair lift according to claim 2, characterized in that: A hinge is provided at the end of the wire rope away from the guide rod, and a hinge handle is fixedly provided on one side of the rear flap. A first hinge hole is formed in the hinge, and a second hinge hole is formed in the hinge handle. A pin passes through the first hinge hole and the second hinge hole.

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