Rear baffle rotating mechanism of wheelchair elevator

Abstract

The utility model provides a rear baffle rotating mechanism of a wheelchair elevator, and belongs to the field of wheelchair elevator devices. The wheelchair elevator rear baffle rotating mechanism comprises an overturning upper arm assembly, an overturning lower arm assembly and an extension spring assembly. The overturning upper arm assembly comprises an overturning upper arm, a first pin shaft and a second pin shaft; the turnover lower arm assembly comprises a sliding arm, a fixed arm, a roller, a compression spring, a compression spring supporting plate, a nylon block and a rear baffle steel cable. The extension spring assembly comprises an extension spring and a fastener, and the extension spring is connected with the fastener. According to the rear baffle rotating mechanism of the wheelchair elevator, the reliability and stability of overturning of the rear baffle are greatly improved, and the safety coefficient of the whole wheelchair elevator in the using process is increased.

Description

Technical Field

[0001] The utility model belongs to the field of wheelchair lift devices, and in particular relates to a rear baffle rotating mechanism of a wheelchair lift. Background Art

[0002] With the rapid development of science and technology and the increase in the aging population, more and more welfare products are being manufactured. In addition to the previous modes of transportation, there are now a variety of welfare equipment for the aging population, the disabled and other people with limited mobility, such as: welfare lifting and rotating seats, welfare lifting and rotating wheelchairs, vehicle-mounted wheelchair lifts, wheelchair boarding guide devices, etc. To meet the current status and future development trends of the global market, it also brings convenience to some people with limited mobility. As one of the welfare products for wheelchairs to get on and off the vehicle, the wheelchair lift allows passengers sitting in wheelchairs to be directly lifted into the vehicle. The operation process is very smooth, and passengers can get on and off the vehicle with peace of mind.

[0003] At present, wheelchair lifts mostly use levers and multi-link structures. Patent CN203017225U discloses a wheelchair lift tailgate drive mechanism composed of a cam mechanism and a swing arm mechanism, which can achieve the swing trajectory requirements of the wheelchair lift tailgate. By using a mechanical drive mechanism instead of an electric drive mechanism, the electric drive mechanism and the electrical control system are eliminated, thereby improving the reliability of the product.

[0004] However, there are still some problems with the current wheelchair lift tailgate drive mechanism products: (1) The multi-link and multi-lever structure leads to poor reliability of the wheelchair lift during use; (2) The wheelchair lift tailgate has poor stability during the overall recovery process, resulting in low safety of the wheelchair lift; (3) The overall structure is complex and the system control is difficult. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a wheelchair lift tailgate rotation mechanism, which optimizes the existing wheelchair lift tailgate rotation mechanism, greatly improves the reliability and stability of the tailgate flipping, and increases the overall safety factor of the wheelchair lift during use.

[0006] The utility model provides a rear baffle rotating mechanism for a wheelchair lift, comprising: a flip upper arm assembly, a flip lower arm assembly, and a tension spring assembly;

[0007] The flip upper arm assembly comprises a flip upper arm, a first pin and a second pin, wherein the first pin and the second pin are respectively arranged at two ends of the flip upper arm;

[0008] The flip lower arm assembly comprises a sliding arm, a fixed arm, a roller, a compression spring, a compression spring support plate, a nylon block, and a tailgate steel cable, wherein the sliding arm is provided with a long sliding groove, the roller is connected to one end of the sliding arm, the compression spring support plate is provided on the fixed arm, the compression spring is provided on the compression spring support plate, the nylon block is provided on the fixed arm, and the tailgate steel cable passes through the nylon block;

[0009] The extension spring assembly comprises an extension spring and a fastener, and the extension spring is connected to the fastener.

[0010] Optionally, a flip hinge sleeve is provided at one end of the fixed arm away from the sliding arm.

[0011] Optionally, the roller is connected to the slide arm via a third pin shaft, and a shaft elastic retaining ring is provided on the third pin shaft.

[0012] Optionally, a steel cable fixing plate is provided on the sliding arm, and the steel cable fixing plate is connected to the tailgate steel cable.

[0013] Optionally, a tailgate steel cable column is provided at one end of the tailgate steel cable, and is connected to the wheelchair tailgate via the tailgate steel cable column.

[0014] Optionally, a polished rod is provided at the bottom end of the compression spring for positioning.

[0015] Optionally, the fasteners are two studs, one of which is connected to the flip upper arm.

[0016] Optionally, the stroke length of the flip lower arm assembly is 351-431 mm.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the utility model include at least one of the following:

[0018] 1. The utility model provides a wheelchair lift tailgate rotating mechanism, in which the sliding arm transmits the force of the rotating arm and the spring through the roller fixed thereon, driving the tailgate steel cable to pull and drive the tailgate to rotate around the flip hinge axis, thereby realizing the rotation of the tailgate, greatly improving the reliability and stability of the flipping of the protective plate, and increasing the overall safety factor of the wheelchair lift during use;

[0019] 2. The wheelchair lift rear baffle rotating mechanism provided by the utility model has a simple structure, is easy to control, and has good practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a rear baffle rotating mechanism of a wheelchair lift according to an embodiment of the present application;

[0021] Figure 2This is a schematic diagram of the structure of the flip lower arm assembly involved in an embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the recovery state of the wheelchair lift involved in the embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the unfolded state of the wheelchair lift involved in an embodiment of the present application.

[0024] List of parts and reference numerals:

[0025] 10-flip upper arm assembly, 101-flip upper arm, 102-first pin shaft, 103-second pin shaft;

[0026] 20-flip lower arm assembly, 201-sliding arm, 202-fixed arm, 203-roller, 204-compression spring, 205-nylon block, 206-rear baffle cable, 207-third pin, 208-flip hinge sleeve, 209-cable fixing plate, 210-rear baffle cable column, 211-compression spring support plate, 212-light rod;

[0027] 30-tension spring assembly, 301-tension spring, 302-first stud, 303-second stud;

[0028] 401-first base, 402-second base, 403-connecting platform, 404-first rotating arm, 405-oil cylinder, 406-second rotating arm, 407-vertical arm, 408-balancing arm;

[0029] 501-rear baffle, 502-platform, 503-front support plate, 504-steel cable pull rope, 505-automatic flap, 506-handrail. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0032] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0035] refer to Figure 1-Figure 4 The embodiment of the present application discloses a wheelchair lift tailgate rotation mechanism, including: a flip upper arm assembly 10, a flip lower arm assembly 20, and a tension spring assembly 30.

[0036] The flip upper arm assembly 10 includes a flip upper arm 101, a first pin shaft 102 and a second pin shaft 103, wherein the first pin shaft 102 and the second pin shaft 103 are respectively arranged at both ends of the flip upper arm 101. One end of the flip upper arm 101 is connected to the vertical arm 407 through the first pin shaft 102, and the other end is connected to the fixed arm 202 through the second pin shaft 103.

[0037] The flip lower arm assembly 20 comprises a sliding arm 201, a fixed arm 202, a roller 203, a compression spring 204, a compression spring support plate 211, a nylon block 205, and a rear fender steel cable 206. The stroke length of the flip lower arm assembly 20 is 351-431 mm.

[0038] The width of the fixed arm 202 is 40±0.5mm. A long slide slot hole (not shown) is provided in the fixed arm 202. The sliding arm 201 is provided with the long slide slot (not shown) and can slide in the long slide slot, thereby realizing telescopic movement and rotation of the rear baffle 501. A flip hinge sleeve 208 is provided at one end of the fixed arm 202 away from the sliding arm 201. The vertical length of the flip hinge sleeve 208 is 43±0.1mm. A steel cable fixing plate 209 is provided on the fixed arm 202. The steel cable fixing plate 209 is connected to the rear baffle steel cable 206 to fix the rear baffle steel cable 206 and ensure safety during use. A rear baffle steel cable column 210 is provided at one end of the rear baffle steel cable 206, and is connected to the wheelchair rear baffle 501 through the rear baffle steel cable column 210.

[0039] The roller 203 is connected to the slide arm 201 through the third pin 207. The third pin 207 is provided with a shaft elastic ring (not shown) to prevent unnecessary axial movement of the bearing. The diameter of the roller 203 is 22.5±0.1mm, and the horizontal length is 50-51mm. In a preferred embodiment, the horizontal length of the roller 203 is 50.3mm.

[0040] The compression spring 204 is arranged on a compression spring support plate 211 in the fixed arm 202 , and a polished rod 212 is arranged at the bottom end of the compression spring 204 for positioning.

[0041] The nylon block 205 is disposed on the fixed arm 202 and connected to the tailgate steel cable 206 .

[0042] The tension spring assembly 30 includes a tension spring 301 and a fastener, wherein the tension spring 301 is connected to the fastener. The fastener includes a first stud 302 and a second stud 303, wherein the first stud 302 is connected to the flip upper arm 101, and the second stud 303 is connected to the fixed arm 202.

[0043] The specific implementation of the rotating mechanism of the present application in the wheelchair lift is as follows:

[0044] When the wheelchair lift is in the recovery state, the wheelchair lift starts to move, the oil cylinder 405 moves the vertical arm 407 from a position higher than the connecting platform 403 to a position at the same height as the connecting platform 403, and the automatic flap 505 is in a state perpendicular to the front support plate 503. At this time, the handrail 506 changes from a vertical state to a horizontal state, and the front support plate 503 and the platform 502 are adjusted from a ground vertical state to a parallel state under the drive of the vertical arm 407 and the steel cable pull rope 504. At this time, the rear baffle 501 is completely compressed by the compression spring under the sliding arm of the rotating mechanism, the sliding arm is retracted into the fixed arm, and the rear baffle steel cable is pulled outward and flipped downward under the drive of the deadweight of the rear baffle to overlap the platform 502. After the wheelchair enters the platform 502 and stabilizes, the wheelchair lift starts to descend. During the descent process, the front support plate 503 and the platform 502 always remain parallel to the ground, the roller of the sliding arm in the rotating mechanism moves away from the second rotating arm 406, the compression spring stretches, the sliding arm extends out of the fixed arm, and the rear baffle cable is pulled to flip upward. After fully extended, the rear baffle 501 flips upward to 45° to form a guardrail. Until the wheelchair lift is in the unfolded state. At this time, the automatic flap 505 is adjusted from a state perpendicular to the front support plate 503 and the platform 502 to a state in contact with the ground, forming a ramp to facilitate the wheelchair to walk out of the bearing mechanism and transfer from the inside of the vehicle to the outside of the vehicle. When the wheelchair enters the vehicle from outside the vehicle, the unfolded bearing mechanism rises, and the oil cylinder 405 lifts the bottom of the vertical arm 407 to a position level with the base. At this time, the handrail 506 is in a horizontal state. When the platform leaves the ground, the automatic flap 505 turns vertically with the front support plate 503. The rear baffle 501 is completely compressed by the compression spring under the sliding arm of the rotating mechanism, and the sliding arm is retracted into the fixed arm. The steel cable of the rear baffle is pulled outward and turned downward under the weight of the rear baffle to overlap the platform 502 of the bearing mechanism to compensate for the height difference between the bearing mechanism and the loading body. The front support plate 503 and the platform 502 remain parallel to the ground. When the rise is completed, the wheelchair enters the vehicle. The device is further folded, the front support plate 503 rotates 90° downward along the hinge, and the platform 502 rotates 90° upward under the rotation and traction of the vertical arm 407 and the rotating mechanism, and stands upright in the middle of the two vertical arms 407. At the same time, the compression spring continues to compress, the sliding arm is retracted into the fixed arm, the rear baffle 501 no longer rotates, and the platform 502 rotates 90° upward to be vertical to the connecting platform 403. At the same time, the handrail 506 moves from a horizontal state to a vertical state.

[0045] The utility model provides a wheelchair lift tailgate rotating mechanism, in which the sliding arm transmits the force of the rotating arm and the spring through the roller fixed thereon, drives the rear tailgate steel cable to pull and drive the rear tailgate to rotate around the flip hinge axis, thereby realizing the rotation of the rear tailgate, greatly improving the reliability and stability of the flipping of the protective plate, and increasing the overall safety factor of the wheelchair lift during use.

[0046] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A wheelchair lift tailgate rotation mechanism, characterized in that: include: Flip upper arm assembly, flip lower arm assembly, stretch spring assembly; The flip upper arm assembly comprises a flip upper arm, a first pin and a second pin, wherein the first pin and the second pin are respectively arranged at two ends of the flip upper arm; The flip lower arm assembly comprises a sliding arm, a fixed arm, a roller, a compression spring, a compression spring support plate, a nylon block, and a tailgate steel cable, wherein the sliding arm is provided with a long sliding groove, the roller is connected to one end of the sliding arm, the compression spring support plate is provided on the fixed arm, the compression spring is provided on the compression spring support plate, the nylon block is provided on the fixed arm, and the tailgate steel cable passes through the nylon block; The extension spring assembly comprises an extension spring and a fastener, and the extension spring is connected to the fastener.

2. The wheelchair lift tailgate rotation mechanism according to claim 1, characterized in that: The end of the fixed arm away from the sliding arm is provided with a flip hinge sleeve.

3. The wheelchair lift tailgate rotating mechanism according to claim 1, characterized in that: The roller is connected to the slide arm via a third pin shaft, and an elastic retaining ring for the shaft is arranged on the third pin shaft.

4. The wheelchair lift tailgate rotating mechanism according to claim 1, characterized in that: A steel cable fixing plate is arranged on the slide arm, and the steel cable fixing plate is connected to the tailgate steel cable.

5. The wheelchair lift tailgate rotating mechanism according to claim 4, characterized in that: A tailgate steel cable column is arranged at one end of the tailgate steel cable, and is connected to the wheelchair tailgate through the tailgate steel cable column.

6. The wheelchair lift tailgate rotating mechanism according to claim 1, characterized in that: A polished rod is provided at the bottom end of the compression spring for positioning.

7. The wheelchair lift tailgate rotating mechanism according to claim 1, characterized in that: The fasteners are two studs, one of which is connected to the flip upper arm.

8. The wheelchair lift tailgate rotating mechanism according to claim 1, characterized in that: The stroke length of the tilt lower arm assembly is 351-431 mm.

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