Bridge plate overturning driving device

Abstract

The utility model relates to the technical field of vehicle accessories, in particular to a bridge plate overturning driving device which comprises a push-pull rod, a cam, an overturning pin and a supporting rod assembly, the stress end of the push-pull rod is hinged to a lifting arm of a lifting platform, the driving end of the push-pull rod is hinged to the stress face of the cam, and the cam is rotatably arranged on a side plate of the lifting platform. A supporting edge is formed at the top of the cam, a driving edge adjacent to the supporting edge is formed on the side portion, away from the push-pull rod, of the cam, the turning pin is rotationally arranged on a side plate of the lifting platform, a rolling wheel is arranged at the stress end of the turning pin and moves on the supporting edge and the driving edge, and the driving end of the turning pin is hinged to the stress end of the supporting rod assembly. The driving end of the supporting rod assembly is hinged to the bridge plate and located on the upper portion of the bridge plate rotating shaft to drive the bridge plate to be unfolded. The technical problem that in the prior art, a bridge plate cannot be well matched with a lifting platform to achieve linkage overturning is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle accessories, in particular to a bridge plate turning drive device. Background Art

[0002] When a bus stops, passengers usually use the steps at the door to get on and off. To accommodate the needs of people with disabilities, the bus is equipped with barrier-free bridge panels. That is, a bridge panel that forms a slope at the door is set to facilitate the passage of passengers in wheelchairs, which greatly facilitates the travel of people with mobility impairments.

[0003] The prior art provides a vehicle-mounted telescopic lifting platform, comprising a main body disposed at the transition between the first and second steps of a vehicle door (the main body being mounted within the vehicle body). Upon activation, the lifting platform within the main body extends horizontally outward from the vehicle body at the height of the first and second steps, and the lifting platform then rises and falls as the lifting arm rotates. Specifically, the lifting arm disposed on the side of the lifting platform has a first end hinged to the main body, and a second end hinged to the side of the extended end of the lifting platform. The platform actually moves in a circular motion within a vertical plane with the hinge point of the first end of the lifting arm as the center of the circle, thereby achieving lifting and lowering. A bridge plate is initially housed within the lifting platform and subsequently needs to be flipped during the lifting of the lifting platform and laid between the lifting platform and the platform within the vehicle body to serve as a bridge. Specifically, after the lifting platform is extended, the bridge plate is first manually flipped to a certain angle, and then the bridge plate rises with the platform. When the platform reaches its highest position, the bridge plate also flips into place. However, the bridge plate in the prior art does not cooperate well with the lifting platform to achieve coordinated flipping. Utility Model Content

[0004] In order to solve the technical problem in the prior art that the bridge plate cannot cooperate well with the lifting platform to achieve linked flipping, the present application proposes a bridge plate flipping drive device to solve the above technical problem.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The utility model provides a bridge plate flipping drive device for a vehicle-mounted telescopic lifting platform, comprising: a push-pull rod, the force-bearing end of the push-pull rod is hinged to the lifting arm of the lifting platform, and the driving end of the push-pull rod is hinged to the force-bearing surface of the cam; a cam, the cam is rotatably arranged on the side plate of the lifting platform, the top of the cam is formed as a supporting edge, and a driving edge adjacent to the supporting edge is formed on the side away from the push-pull rod; a flip pin, the flip pin is rotatably arranged on the side plate of the lifting platform, a roller is arranged on the force-bearing end of the flip pin, the roller moves on the supporting edge and the driving edge, and the driving end of the flip pin is hinged to the force-bearing end of the strut assembly; a strut assembly, the driving end of the strut assembly is hinged to the bridge plate at a position above the bridge plate rotating shaft to drive the bridge plate to unfold, and when the roller of the flip pin moves to the driving edge during the rotation of the cam, the flip pin is driven by the cam to push the strut assembly to realize the flipping of the bridge plate.

[0007] Furthermore, the cam forms an arc-shaped groove for guiding along the rotation direction. Correspondingly, a guide column is fixed on the side plate of the lifting platform, and the guide column is fitted in the arc-shaped groove.

[0008] Furthermore, the cam forms a plurality of hinge holes along the rotation direction that can be hinged to the push-pull rod.

[0009] Furthermore, the strut assembly includes a rod sleeve hinged to the flip pin and an elastic strut hinged to the bridge plate. In a natural state, the elastic strut is in a state of popping out of the rod sleeve.

[0010] Furthermore, it also includes a support column fixed on the side plate of the lifting platform, and the support column is arranged on the side of the flip pin away from the support rod assembly to reversely support the support rod assembly.

[0011] Furthermore, it also includes a limit column fixed on the side plate of the lifting platform, and the limit column is configured at the rotation axis of the bridge plate to limit the strut assembly and thus adjust the extreme position when the bridge plate is fully unfolded.

[0012] Based on the above technical solution, the technical effects that can be achieved by the present invention are:

[0013] The bridge plate flipping drive device of the present invention is used for a vehicle-mounted telescopic lifting platform. After the lifting platform is extended from the steps at the vehicle door, the bridge plate on the lifting platform is first manually flipped out to the initial deployment angle. Specifically, the bridge plate is first manually flipped to a position with an angle of 45 degrees to the lifting platform, and then under the action of the support rod assembly, the bridge plate will continue to flip to a position with an angle of about 90 degrees to the lifting platform. This position is the initial deployment position. At the initial deployment angle, the roller on the flip pin is supported by the supporting edge on the cam (reverse limit), so the bridge plate will not be fully deployed. Then, as the lifting platform rises, the lifting arm originally parallel to the side plate of the lifting platform slowly forms an angle with the side plate of the lifting platform, and the push-pull rod hinged on the lifting arm will pull the cam in the direction away from the vehicle body, the cam rotates, and the roller originally matched with the supporting edge of the cam slowly moves toward the driving edge. In this process (the lifting platform rises to above all the steps at the vehicle door ) In the process, since the roller is supported by the supporting edge, the flip pin does not rotate, the flip pin does not push the strut assembly, and the strut assembly does not push the bridge plate. The angle between the bridge plate and the lifting platform hardly changes, and the bridge plate does not unfold after manual flipping. The reason why the bridge plate does not unfold during this process is that there is not enough space at the car door, and premature flipping of the bridge plate will collide with the steps at the car door. When the lifting platform rises above all the steps at the car door, the lifting platform continues to rise, the cam continues to rotate, the roller moves to the driving edge, and the force-bearing end of the flip pin loses the support of the supporting edge, the flip pin rotates, and the driving end of the flip pin pushes the strut assembly toward the bridge plate. The angle between the bridge plate and the lifting platform increases, and the bridge plate unfolds until the lifting platform rises to the upper limit position, and the bridge plate also unfolds to the limit position and is laid between the lifting platform and the platform in the vehicle body, thereby solving the technical problem that the bridge plate in the prior art cannot cooperate well with the lifting platform to achieve linked flipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the bridge plate turning drive device of the present invention;

[0015] Figure 2 It is a partially enlarged schematic diagram of the bridge plate turning drive device of the present invention;

[0016] Figure 3 This is a schematic diagram of the bridge plate turning drive device of the present invention after manual turning of the bridge plate;

[0017] Figure 4 A schematic diagram of the bridge plate turning drive device of the present invention after the bridge plate is turned manually and then turned under the action of the support rod assembly;

[0018] Figure 5 This is a schematic diagram of the bridge plate turning drive device of the present invention in the first state of the lifting platform rising;

[0019] Figure 6 This is a schematic diagram of the bridge deck flipping drive device of the present invention when the lifting platform is in the ascending state and the second roller is about to enter the driving side;

[0020] Figure 7 This is a schematic diagram of the bridge plate flipping drive device of the present invention with the lifting platform in the ascending state and the three bridge plates clearly unfolded;

[0021] Figure 8 This is a schematic diagram of the bridge deck flipping drive device of the present invention, with the lifting platform raised to the highest position and the bridge deck fully unfolded;

[0022] Figure 9 This is a schematic diagram of the bridge plate flipping drive device of the present invention when the lifting platform is lowered to the lowest position.

[0023] In the present utility model: a-bridge plate; b-lifting platform, b1-lifting arm; b2-side plate, b3-guide column, b4-support column, b5-limiting column; 1-push-pull rod; 2-cam, 21-support edge, 22-driving edge, 23-arc groove, 24-hinge hole; 3-flip pin, 31-roller; 4-support rod assembly, 41-rod sleeve, 42-elastic support rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figure 1-9As shown, the utility model provides a bridge plate flipping drive device for a vehicle-mounted telescopic lifting platform, including a push-pull rod 1, a cam 2, a flip pin 3 and a support rod assembly 4. The force-bearing end of the push-pull rod 1 is hinged to the lifting arm b1 of the lifting platform b, and the driving end of the push-pull rod 1 is hinged to the force-bearing surface of the cam 2. The cam 2 is rotatably arranged on the side plate b2 of the lifting platform b. The rotating shaft of the cam 2 is at the lowest point of the cam 2. The top of the cam 2 is formed as a supporting edge 21. The supporting edge 21 is in an arc shape, and a driving edge 22 adjacent to the supporting edge 21 is formed on the side away from the push-pull rod 1. The driving edge 22 is a straight edge. The flip pin 3 is rotatably arranged on the side plate b2 of the lifting platform b, and the rotating shaft of the flip pin 3 is in the middle of the flip pin 3. A roller 31 is arranged on the force-bearing end of the flip pin 3, and the roller 31 moves on the supporting edge 21 and the driving edge 22. The driving end of the flip pin 3 is hinged to the force-bearing end of the strut assembly 4, and the driving end of the strut assembly 4 is hinged to the bridge plate a at a position above the rotating shaft of the bridge plate a to drive the bridge plate a to unfold. When the roller 31 of the flip pin 3 moves to the driving edge 22 during the rotation of the cam 2, the flip pin 3 is driven by the cam 2 to push the strut assembly 4 to realize the flipping of the bridge plate a.

[0026] In a specific embodiment of the present invention, the cam 2 is formed with a plurality of hinge holes 24 along the rotation direction, which can be hinged to the push-pull rod 1 , so as to adapt to vehicle bodies of different lifting heights.

[0027] In a specific embodiment of the present invention, the strut assembly 4 includes a rod sleeve 41 hinged to the driving end of the flip pin 3 and an elastic strut 42 hinged to the bridge plate a. In a natural state, the elastic strut 42 is in a state of popping out the rod sleeve 41, always supporting the bridge plate a so that the bridge plate a will not close under the action of gravity. In this embodiment, the elastic strut 42 is preferably a gas strut.

[0028] When the lifting platform B just extends out of the vehicle body and has not yet been lifted, the bridge plate a is manually flipped out from the lifting platform B, and the elastic support rod 42 will push the bridge plate a to the initial deployment position. The support rod assembly 4 can also be selected from a rod sleeve 41 with an elastic rod that can automatically pop out the rod sleeve 41.

[0029] In a specific embodiment of the present invention, a support column b4 is further provided, fixed to the side panel b2 of the lifting platform b. The support column b4 is disposed on the side of the flip pin 3 away from the strut assembly 4 to provide reverse support for the strut assembly 4. The function of the support column b4 is, on the one hand, to manually flip the bridge deck a on the lifting platform b, against which the flip pin 3 abuts, thereby supporting the rod sleeve 41 of the strut assembly 4 and serving as a force point for manual flipping. On the other hand, when the lifting platform b is in its lowest position, the support column b4 acts as a reverse limiter for the flip pin 3, preventing the flip pin 3 from deviating.

[0030] In a specific embodiment of the present invention, a limit column b5 fixed to the side panel b2 of the lifting platform b is further included. The limit column b5 is configured at the rotation axis of the bridge plate a to limit the support rod assembly 4 and thus adjust the ultimate position of the bridge plate a when it is fully extended. The function of the limit column b5 is to allow the hinge point between the bridge plate a and the support rod assembly 4 to be above the rotation point of the bridge plate a when the bridge plate a is fully extended. Otherwise, the hinge point between the bridge plate a and the support rod assembly 4 is below the rotation point of the bridge plate a. In this case, when the bridge plate a is retracted in the reverse direction, the points of force of all linkage points will change, making reverse retraction impossible.

[0031] In the bridge plate flipping drive device of the present invention, after the vehicle-mounted telescopic lifting platform extends out of the vehicle body, the bridge plate a is manually flipped over and pushed to the initial unfolded position under the action of the strut assembly 4. As the lifting platform b rises or falls, the push-pull rod 1 hinged on the lifting arm b1 will pull the cam 2 in the direction away from the vehicle body, and the cam 2 rotates. The roller 31 originally matched with the supporting edge 21 of the cam 2 slowly moves toward the driving edge 22. During this process, since the roller 31 is supported by the supporting edge 21, the flip pin 3 does not rotate, the flip pin 3 does not push the strut assembly 4, and the strut assembly 4 does not push the bridge plate a. The angle between the bridge plate a and the lifting platform b hardly changes, and the bridge plate a does not unfold after being manually flipped over:

[0032] Here, if the lifting platform b continues to rise, the cam 2 continues to rotate, and the roller 31 moves to the driving edge 22 or outside the driving edge 22, the force-bearing end of the flip pin 3 loses the support of the supporting edge 21, the flip pin 3 rotates, and the driving end of the flip pin 3 pushes the support rod assembly 4 toward the bridge plate a. The angle between the bridge plate a and the lifting platform b increases, and the bridge plate a unfolds until the lifting platform b rises to the upper limit position. The bridge plate a also unfolds to the limit position and is laid between the lifting platform b and the platform inside the vehicle body;

[0033] Here, if the lifting platform b continues to descend, Figure 9 As shown, the action of the bridge plate a before the wheel rolls out of the support edge 21 is blocked by the main part of the lifting platform b or part of the vehicle body, and the bridge plate a no longer continues to unfold. After the roller 31 is out of the support edge 21, it no longer contacts the cam 2. The bridge plate a may not move before the wheel rolls out of the support edge 21. Then the subsequent action of the bridge plate a is the same as when the lifting platform b continues to rise.

[0034] It should be understood that the specific embodiments described above are only used to explain the present invention and are not intended to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A bridge plate turning drive device for a vehicle-mounted telescopic lifting platform, characterized in that: include: A push-pull rod (1), wherein the force-bearing end of the push-pull rod (1) is hinged to the lifting arm (b1) of the lifting platform (b), and the driving end of the push-pull rod (1) is hinged to the force-bearing surface of the cam (2); A cam (2), the cam (2) being rotatably disposed on a side plate (b2) of the lifting platform (b), the top of the cam (2) being formed as a supporting edge (21), and a driving edge (22) being formed adjacent to the supporting edge (21) on a side away from the push-pull rod (1); A flip pin (3), the flip pin (3) is rotatably arranged on the side plate (b2) of the lifting platform (b), a roller (31) is arranged on the force-bearing end of the flip pin (3), the roller (31) moves on the supporting edge (21) and the driving edge (22), and the driving end of the flip pin (3) is hinged to the force-bearing end of the support rod assembly (4); A strut assembly (4), wherein the driving end of the strut assembly (4) is hinged on the bridge plate (a) and is located above the rotating shaft of the bridge plate (a) to drive the bridge plate (a) to unfold; when the roller (31) of the flip pin (3) moves to the driving edge (22) during the rotation of the cam (2), the flip pin (3) is driven by the cam (2) to push the strut assembly (4) to achieve the flipping of the bridge plate (a).

2. The bridge plate turning driving device according to claim 1, characterized in that: The cam (2) forms an arcuate groove (23) for guiding along the rotation direction. Correspondingly, a guide column (b3) is fixed on the side plate (b2) of the lifting platform (b), and the guide column (b3) is fitted in the arcuate groove (23).

3. The bridge plate turning driving device according to claim 1, characterized in that: The cam (2) forms a plurality of hinge holes (24) along the rotation direction, which can be hinged to the push-pull rod (1).

4. The bridge plate turning driving device according to claim 1, characterized in that: The strut assembly (4) comprises a rod sleeve (41) hinged to the flip pin (3) and an elastic strut (42) hinged to the bridge plate (a); in a natural state, the elastic strut (42) is in a state of popping out of the rod sleeve (41).

5. The bridge plate turning driving device according to claim 1, characterized in that: It also includes a support column (b4) fixed on the side plate (b2) of the lifting platform (b), and the support column (b4) is arranged on the side of the flip pin (3) away from the support rod assembly (4) to reversely support the support rod assembly (4).

6. The bridge plate turning driving device according to claim 1, characterized in that: It also includes a limiting column (b5) fixed on the side plate (b2) of the lifting platform (b), and the limiting column (b5) is arranged at the rotation axis of the bridge plate (a) to limit the support rod assembly (4) and thereby adjust the extreme position of the bridge plate (a) when it is fully unfolded.

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