Scissor fork transmission mechanism for pedal

Abstract

The utility model discloses a scissor fork transmission mechanism for a pedal, which comprises the pedal, a pushing seat is arranged on the pedal, a linear guide rail is arranged on the pushing seat, the linear guide rail on the pushing seat is connected with the other linear guide rail through a scissor fork assembly, and the other linear guide rail is connected with a non-metal nut and a driving assembly. The scissor-fork-shaped mechanism formed by intersecting the metal rods is used for transmission, the problems that a synchronous belt occupies a large space and deforms along with time are solved, and meanwhile the problems that a gear and a rack are large in noise and need to be maintained regularly are solved. The scissor fork structure is free of maintenance, small in occupied size and large in movement stroke, the later maintenance time and cost are reduced, and meanwhile the space occupied by the transmission structure is reduced.

Description

Technical Field

[0001] The utility model relates to the field of rail transportation, in particular to a scissor-type transmission mechanism for a pedal. Background Art

[0002] In recent years, for safety and humane reasons, rail transit vehicles have increasingly been equipped with retractable steps to compensate for the gap between the vehicle and the platform. These commercially available retractable steps typically use synchronous belts as a transmission mechanism. However, in practice, these belts have been found to occupy significant space along the travel direction and gradually deform over time, requiring regular inspections of their tension, which increases maintenance workload and operating costs. Furthermore, the synchronous belt structure has a limited load-bearing capacity, making it less suitable for some large step structures. While rack and pinion transmission can reduce travel space, it can be noisy, requires regular lubrication, has poor corrosion resistance, and carries high maintenance costs, resulting in a less comfortable passenger experience.

[0003] Therefore, it is necessary to develop a new type of scissor-type transmission mechanism for pedals to overcome the above problems. Utility Model Content

[0004] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, the utility model provides a scissor-type transmission mechanism for a pedal. The scissor-type mechanism formed by the intersection of metal rods is used for transmission, which avoids the problems of the synchronous belt taking up a large space and being easy to deform, the gear rack making loud noises, and requiring regular lubrication. It is more convenient to maintain and reduces the time and cost of subsequent maintenance.

[0005] Technical solution: The utility model is a scissor-type transmission mechanism for a pedal, which is characterized in that it includes a pedal, a push seat is provided on the pedal, a linear guide rail is provided on the push seat, the linear guide rail on the push seat is connected to another linear guide rail through a scissor-type assembly, and the other linear guide rail is connected to a non-metallic nut and a drive assembly.

[0006] Wherein, the two linear guide rails are arranged in parallel.

[0007] Wherein, the scissor-fork assembly is a scissor-fork structure in which metal rods are cross-arranged.

[0008] Among them, the two end points on the left side of the scissor assembly are respectively connected to the linear guide rail and the pedal on the push seat.

[0009] Among them, one endpoint on the right side of the scissor assembly is connected to the linear guide rail on the non-metallic nut side.

[0010] Wherein, the non-metallic nut is sleeved on the rod body of the driving assembly.

[0011] Wherein, the pedal is a telescopic pedal for rail transportation.

[0012] Beneficial Effects: Compared with existing technologies, this utility model offers the following significant advantages: The scissor-like mechanism formed by intersecting metal rods performs transmission, thus avoiding the problem of synchronous belt deformation over time, making maintenance more convenient and reducing the time and cost of subsequent maintenance. The scissor-like structure evenly distributes force, thereby increasing the load-bearing capacity, meeting the needs of large pedals and extending their service life to a certain extent. Furthermore, the scissor-like structure occupies less space when not in operation, facilitating the miniaturization of pedals. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a diagram of the use state of the utility model;

[0015] In the figure, 1 is a push seat; 2 is a linear guide rail; 3 is a non-metallic nut; 4 is a drive assembly; 5 is a scissor assembly; and 6 is a pedal. DETAILED DESCRIPTION

[0016] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0017] The scissor-type transmission mechanism for the pedal of the utility model includes a pedal 6, a push seat 1 is provided on the pedal 6, a linear guide rail 2 is provided on the push seat 1, the linear guide rail 2 on the push seat 1 is connected to another linear guide rail 2 through a scissor-type assembly 5, and the other linear guide rail 2 is connected to a non-metallic nut 3 and a driving assembly 4. The two linear guide rails 2 are arranged in parallel. The scissor-type assembly 5 is a scissor-type structure in which metal rods are cross-arranged. The two end points on the left side of the scissor-type assembly 5 are respectively connected to the linear guide rail 2 on the push seat 1 and the pedal 6. One end point on the right side of the scissor-type assembly 5 is connected to the linear guide rail 2 on the side of the non-metallic nut 3. The non-metallic nut 3 is sleeved on the rod body of the driving assembly 4. The pedal 6 is a telescopic pedal for rail transportation.

[0018] This mechanism is installed in the pedal device of the rail vehicle, and the drive assembly 4 and the adjacent linear guide 2 are directly fixed to the pedal device. The non-metallic nut 3 and the drive assembly 4 move in coordination to drive the slider of the linear guide 2. The non-metallic nut 3 can reduce the material requirements of the screw rod that matches it, and achieve the requirement of lubrication-free throughout the life cycle. The two end points of the scissors assembly 5 are respectively connected to the two linear guides 2, and the end points reciprocate on the linear guides 2. One end point is connected to the push seat 1, and the other end point is fixed to the pedal device. The linear guide 2 adjacent to the push seat 1 is fixed on the push seat 1, and the push seat 1 is connected to the pedal 6.

[0019] During operation, the drive assembly 4 drives the non-metallic nut 3, causing the end points of the connected scissor assembly 5 to move on the linear guide 2. The shape of the scissor assembly 5 changes accordingly, pushing out the pedal 6. After the operation is completed, the drive assembly 4 moves in the opposite direction, and the shape of the scissor assembly 5 changes, retracting the pedal 6.

[0020] This utility model utilizes a scissor-like mechanism formed by intersecting rods for transmission. This avoids the issues of synchronous belts taking up large space and deforming over time, as well as the noise and regular lubrication of rack and pinion gears. This makes maintenance more convenient, reducing the time and cost of subsequent repairs. The scissor-like structure distributes force evenly, resulting in greater load-bearing capacity, meeting the needs of large pedals and extending their service life to a certain extent. Furthermore, the scissor-like structure occupies less space when not in operation, facilitating the miniaturization of pedals.

Claims

1. A scissor-type transmission mechanism for a pedal, characterized in that: The invention comprises a pedal (6), a push seat (1) is provided on the pedal (6), a linear guide rail (2) is provided on the push seat (1), the linear guide rail (2) on the push seat (1) is connected to another linear guide rail (2) through a scissor assembly (5), and the other linear guide rail (2) is connected to a non-metallic nut (3) and a driving assembly (4).

2. The scissor-type transmission mechanism for pedal according to claim 1, characterized in that: The two linear guide rails (2) are arranged in parallel.

3. The scissor-type transmission mechanism for pedal according to claim 1, characterized in that: The scissor-fork assembly (5) is a scissor-fork structure in which metal rods are arranged crosswise.

4. The scissor-type transmission mechanism for a pedal according to claim 3, characterized in that: The two end points on the left side of the scissor assembly (5) are respectively connected to the linear guide rail (2) and the pedal (6) on the push seat (1).

5. The scissor-type transmission mechanism for a pedal according to claim 4, characterized in that: One end point on the right side of the scissor assembly (5) is connected to the linear guide rail (2) on the side of the non-metallic nut (3).

6. The scissor-type transmission mechanism for a pedal according to claim 1, characterized in that: The non-metallic nut (3) is sleeved on the rod body of the driving component (4).

7. The scissor-type transmission mechanism for a pedal according to claim 1, characterized in that: The pedal (6) is a telescopic pedal for rail transportation.

Images