A flap device for a wheelchair lift

Abstract

The utility model belongs to the technical field of automobile parts, disclose a kind of turnover plate device for wheelchair lift, including two groups of turnover plate mechanism and backstop, wherein, two groups of turnover plate mechanism are respectively symmetrically arranged on drive arm main body, backstop is rotatably connected at the rear end of bearing platform, and turnover plate mechanism includes several guide wheels and wire, wherein, several guide wheels are distributed and installed on drive arm main body, one end of wire is connected with drive arm main body, and the other end is connected with backstop after several guide wheels, for driving backstop to overturn up and down, and the spacing between the connecting points of the two ends of wire increases or decreases with drive arm main body movement.The utility model does not need to increase additional drive, can realize the overturning of backstop, simple structure, convenient operation.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and specifically relates to a flip-up device for a wheelchair lift. Background Technology

[0002] With the increasing demand for accessible travel, wheelchair lifts, as key auxiliary equipment in special vehicles such as welfare vehicles and accessible taxis, directly impact the independent travel experience of wheelchair users. Generally, wheelchair lifts consist of four core modules: a platform, a lifting mechanism, a drive system, and safety devices. They achieve vertical lifting and folding of the platform through mechanical or hydraulic drives, aiming to solve the technical challenges of safe and convenient entry and exit for wheelchair users.

[0003] In the structural design of a support platform, a rear panel is typically installed at the rear end of the platform to ensure stability of wheelchair support and a smooth transition between the platform and the base. As a key component of the platform, the rear panel serves a dual function: firstly, when the lift is in operation (platform deployed), the rear panel needs to flip upwards to form a safe wheelchair support space in conjunction with the platform, ensuring the safety of the wheelchair during lifting. Secondly, when the wheelchair needs to leave the platform / enter the vehicle, the rear panel needs to form a stable connection between the platform and the base, eliminating any height difference or gaps between the platform and the vehicle floor (the base is mounted on the vehicle floor), ensuring unobstructed wheelchair movement and preventing the risk of tipping over due to bumps or jamming. However, in existing technologies, the motion control of the rear panel often relies on complex hinges or independent drive units, resulting in structural redundancy, high failure rates, poor synchronization, and high costs. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a flip-up device for wheelchair lifts that allows the rear panel to flip without requiring additional drive, resulting in a simple structure and convenient operation.

[0005] The main technical solution adopted in this utility model is as follows:

[0006] A flip-up device for a wheelchair lift includes two sets of flip-up mechanisms and a rear baffle. The two sets of flip-up mechanisms are symmetrically arranged on the drive arm body. The rear baffle is rotatably connected to the rear end of the support platform. Each flip-up mechanism includes several guide wheels and a wire. The guide wheels are distributed and installed on the drive arm body. One end of the wire is connected to the drive arm body, and the other end is connected to the rear baffle after passing through several guide wheels, for driving the rear baffle to flip up and down. The distance between the connection points at both ends of the wire increases or decreases as the drive arm body moves.

[0007] Preferably, the flipping mechanism further includes an elastic tension member, one end of which is mounted on the drive arm body and the other end is connected to the wire drawing mechanism.

[0008] Preferably, the two sides of the rear baffle are rotatably connected to the two rear sides of the bearing platform via rotating connecting plates, and the wire is connected to the rotating connecting plate to pull the rotating connecting plate to rotate around the rotating connection point.

[0009] Preferably, the drive arm body includes a main arm, an upper drive arm, a lower drive arm, a drive member, and an auxiliary arm assembly. One end of the drive member is hinged to the lower drive arm, and the other end is hinged to the upper drive arm. One end of the upper drive arm is hinged to the base bracket, and the other end is hinged to the main arm. One end of the lower drive arm is hinged to the base bracket, and the other end is hinged to the main arm. The main arm, upper drive arm, lower drive arm, and base bracket are hinged together to form a parallelogram. One end of the auxiliary arm assembly is mounted on the main arm, and the other end is mounted on the side of the bearing platform.

[0010] Preferably, there are three guide wheels, one of which is located on the lower drive arm and the other two are located on the main arm.

[0011] Preferably, the elastic tension member is a tension spring, one end of which is mounted on the lower drive arm of the drive arm body, and the other end is connected to the wire.

[0012] Beneficial effects: This utility model provides a flip-up device for wheelchair lifts. Based on the original drive arm main structure, it adopts a combination of fixed wire length and spring displacement compensation to solve the flip-up control problem caused by the extension of the lifting stroke with a purely mechanical structure. It takes into account reliability, low cost and maintenance convenience, simplifies the mechanical structure, eliminates the need for additional drive, and helps to reduce production costs.

[0013] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 (initial state);

[0014] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 (in unfolded state);

[0015] Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 (flipped upwards).

[0016] Figure 4 This is a schematic diagram of the overall structure of Embodiment 1 (final landing state).

[0017] Figure 5 This is a schematic diagram of the flap mechanism in Embodiment 1.

[0018] In the diagram: 1. Flipping mechanism, 1-1. Wire drawing, 1-2. Guide wheel, 1-3. Elastic tension component, 2. Rear baffle, 2-1. Rotating connecting plate, 3. Drive arm body, 3. Main arm, 3-1. Upper drive arm, 3-2. Lower drive arm, 3-3. Drive component, 3-4. Auxiliary arm assembly, 3-5. Bearing platform, 4. Base, 5. Base bracket, 5-1. Detailed Implementation

[0019] 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 some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application. Example 1

[0020] like Figures 1-5 The diagram illustrates a flip-up device for a wheelchair lift, comprising two sets of flip-up mechanisms 1 and a rear baffle 2. The two sets of flip-up mechanisms 1 are symmetrically arranged on the drive arm body 3. The rear baffle 2 is rotatably connected to the rear end of the support platform 4. Each flip-up mechanism 1 includes several guide wheels 1-2 and a wire 1-1. The guide wheels 1-2 are distributed and installed on the drive arm body 3. One end of the wire 1-1 is connected to an elastic tension member 1-3, and the other end is connected to the rear baffle 2 via the guide wheels 1-2, for driving the rear baffle 2 to flip up and down. The distance between the connection points at both ends of the wire increases or decreases with the movement of the drive arm body. In this invention, the length of the wire remains constant.

[0021] To meet the increased lifting stroke requirements of the wheelchair lift and compensate for the resulting additional tension changes in the wire 1-1, in this embodiment 1, the flip-up mechanism is further provided with an elastic tension member 1-3. One end of the elastic tension member 1-3 is mounted on the lower drive arm 3-3 of the drive arm body 3, and the other end is connected to the wire 1-1. In this embodiment 1, the elastic tension member 1-3 is preferably a tension spring.

[0022] In this utility model, the two sides of the rear baffle 2 are rotatably connected to the rear sides of the supporting platform 4 via a rotating connecting plate 2-1. A wire 1-1 is connected to the rotating connecting plate 2-1 and is used to pull the rotating connecting plate 2-1 to rotate around the rotating connection point. In this embodiment 1, one end of the rotating connecting plate 2-1 is fixedly connected to the rear baffle 2, and the other end is rotatably connected to the supporting platform 4. The wire 1-1 is connected to the rotating connecting plate 2, and its traction force drives the rotating connecting plate 2-1 to rotate around its rotating connection point on the supporting platform 4, thereby causing the rear baffle 2, which is fixed to it, to achieve a flipping motion.

[0023] In this embodiment 1, the drive arm body 3 includes a main arm 3-1, an upper drive arm 3-2, a lower drive arm 3-3, a drive member 3-4, and an auxiliary arm assembly 3-5. One end of the drive member 3-4 is hinged to the lower drive arm 3-3, and the other end is hinged to the upper drive arm 3-2. One end of the upper drive arm 3-2 is hinged to the base bracket 5-1, and the other end is hinged to the main arm 3-1. One end of the lower drive arm 3-3 is hinged to the base bracket 5-1, and the other end is hinged to the main arm 3-1. The main arm 3-1, the upper drive arm 3-2, the lower drive arm 3-3, and the base bracket 5-1 are hinged together to form a parallelogram. One end of the auxiliary arm assembly 3-5 is mounted on the main arm 3-1, and the other end is mounted on the side of the bearing platform 4.

[0024] In this invention, the auxiliary arm assembly 3-5 is used to drive the support platform 4 to unfold or fold. This function is prior art and therefore not described in detail. The drive component 3-4 drives the upper drive arm 3-2 and the lower drive arm 3-3 to move, thereby driving the main arm 3-1 to move up and down. The up and down movement of the main arm 3-1 simultaneously drives the auxiliary arm assembly 3-5 and the support platform 4 to move up and down. During this up and down movement, the auxiliary arm assembly 3-5 correspondingly drives the support platform 4 to complete the unfolding or folding action. In addition, during the up and down movement, the distance between the fixed points at both ends of the wire connecting the lower drive arm 3-3 and the rotating connecting plate 2-1 will increase or decrease with the movement of the upper drive arm 3-2 and the lower drive arm 3-3 (i.e., the wire is tensioned or relaxed), thereby driving the rear baffle 2 on the rotating connecting plate 2-1 to rotate.

[0025] In this invention, the driving component can be, but is not limited to, a hydraulic cylinder, an electric push rod, or a pneumatic cylinder. Those skilled in the art can make selective designs according to their needs.

[0026] In this embodiment 1, there are three guide wheels 1-2, one of which is located on the lower drive arm 3-3, and the other two are located on the main arm 3-1. In this invention, each guide wheel has a groove. The wire is wound into the groove of the guide wheel according to a preset path. The arc-shaped contour of the groove matches the wire diameter, ensuring that the wire remains within the groove during movement and guaranteeing the stability of the wire drawing motion. In this invention, multiple guide wheels are combined to form a specific direction (such as a preset wire drawing path), changing the traction direction of the wire drawing. The specific number of guide wheels can be set according to actual needs.

[0027] In this invention, the wire can be a steel wire rope, cable, or other rope that meets the traction requirements.

[0028] The working principle of this utility model is as follows:

[0029] In the initial contraction state, such as Figure 1As shown, the drive arm body 3 is in the retracted position, the wire 1-1 connecting the rotating connecting plate 2-1 is in a relaxed state, and the rear baffle 2 is retracted above the base 5. When the wheelchair lift is started, the drive arm body 3 moves downward under the action of the drive component 3-4, and drives the supporting platform 4 to unfold through the auxiliary arm assembly 3-5, as shown. Figure 2 As shown. During the deployment of the carrying platform 4, the rear baffle 2 is always driven by the carrying platform 4 and overlaps the base 5, effectively eliminating the height difference and gap between the carrying platform 4 and the carriage floor (on which the base 5 is installed), and the tension wire is also tightened accordingly. Subsequently, as the carrying platform 4 continues to descend under the drive arm body 3, as... Figure 3 As shown, the distance between the elastic tension member 1-3 and the rotating connecting plate 2-1 gradually increases. Since the length of the tension member 1-1 is fixed, this increased distance will generate tension on the rotating connecting plate 2-1, driving it to rotate the rear baffle 2 upwards around the rotating connection point, ultimately forming a complete wheelchair safety support space with the support platform 4. After the rear baffle 2 rotates into place, it cannot continue to rotate due to mechanical space constraints. At this point, if the support platform 4 continues to descend, such as... Figure 4 As shown, the elastic tension member 1-3 will be stretched, and the resulting elastic deformation is used to compensate for the additional tension required for the wire 1-1 due to the increased distance, preventing damage to the mechanism or breakage of the wire due to continued descent after the rear baffle flips into place.

[0030] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A flip-up device for a wheelchair lift, characterized in that, It includes two sets of flipping mechanisms and a rear baffle. The two sets of flipping mechanisms are symmetrically arranged on the main body of the drive arm. The rear baffle is rotatably connected to the rear end of the carrying platform. The flipping mechanism includes several guide wheels and a wire. The guide wheels are distributed and installed on the main body of the drive arm. One end of the wire is connected to the main body of the drive arm, and the other end is connected to the rear baffle after passing through several guide wheels. It is used to drive the rear baffle to flip up and down. The distance between the connection points of the two ends of the wire increases or decreases as the main body of the drive arm moves.

2. The flip-up device for a wheelchair lift according to claim 1, characterized in that, The flipping mechanism also includes an elastic tension member, one end of which is mounted on the drive arm body and the other end is connected to the wire drawing mechanism.

3. The flip-up device for a wheelchair lift according to claim 1 or 2, characterized in that, The two sides of the rear baffle are respectively rotatably connected to the two rear sides of the bearing platform via rotating connecting plates. The wire is connected to the rotating connecting plate and is used to pull the rotating connecting plate to rotate around the rotating connection point.

4. The flip-up device for a wheelchair lift according to claim 2, characterized in that, The drive arm body includes a main arm, an upper drive arm, a lower drive arm, a drive component, and an auxiliary arm assembly. One end of the drive component is hinged to the lower drive arm, and the other end is hinged to the upper drive arm. One end of the upper drive arm is hinged to the base bracket, and the other end is hinged to the main arm. One end of the lower drive arm is hinged to the base bracket, and the other end is hinged to the main arm. The main arm, upper drive arm, lower drive arm, and base bracket are hinged together to form a parallelogram. One end of the auxiliary arm assembly is mounted on the main arm, and the other end is mounted on the side of the bearing platform.

5. The flip-up device for a wheelchair lift according to claim 1, characterized in that, There are three guide wheels, one of which is located on the lower drive arm and the other two are located on the main arm.

6. The flip-up device for a wheelchair lift according to claim 4, characterized in that, The elastic tension component is a tension spring, one end of which is mounted on the lower drive arm of the drive arm body, and the other end is connected to the wire.

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