A lightweight lever braking system

Abstract

A lightweight lever braking system, belonging to the field of railway freight car technology, includes interconnected tie rod assemblies and lever assemblies. The tie rod assembly is disposed inside the web of the middle beam. A lower cover plate of the middle beam is connected to the bottom of the web. The lower cover plate has symmetrical first through holes on both sides. The tie rod assembly passes through the first through holes and is connected to the basic brake lever via a flexible connection structure. Two second through holes are opened on the web of the middle beam. The lever assembly passes through the second through holes and is connected to the drive assembly. In this invention, the brake tie rod assembly is arranged inside the middle beam cavity, while the brake cylinder and brake adjuster are arranged outside the middle beam. The overall structure is compact, without a conversion device, significantly reducing the auxiliary components of the braking system, reducing the weighing weight, and lowering costs. At the same time, it can effectively reduce the loss of braking force during movement.

Description

Technical Field

[0001] This utility model belongs to the field of railway freight car technology, and relates to the braking system of narrow-gauge railway freight cars, and in particular to a lightweight lever braking system. Background Technology

[0002] Due to space constraints, narrow-gauge railway freight cars often use vertical levers for basic braking. When arranging the vehicle braking system, a conversion device is needed to move the connection point between the car body braking system and the bogie basic braking system to the outside of the car body center beam to ensure sufficient space for braking system assembly and operation.

[0003] However, this arrangement has the following drawbacks:

[0004] 1. The conversion device increases the vehicle's weight and is located at the bottom of the vehicle, which limits space and makes installation and precision control relatively difficult.

[0005] 2. The conversion device will cause a loss of vehicle braking efficiency, and the loss rate is greatly affected by the assembly precision and cannot be effectively controlled.

[0006] Therefore, in order to solve these problems, this utility model proposes a lightweight lever braking system. Summary of the Invention

[0007] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a lightweight lever braking system to solve the technical problems of cumbersome layout structure and loss of braking efficiency in the lever braking system of narrow gauge railway freight cars in the prior art.

[0008] To achieve the above and other related objectives, this utility model provides a lightweight lever braking system, including a pull rod assembly and a lever assembly connected to each other. The pull rod assembly is disposed on the inner side of the web of the middle beam. A lower cover plate of the middle beam is connected to the bottom of the web of the middle beam. The lower cover plate of the middle beam has first through holes symmetrically opened on both sides. The pull rod assembly passes through the first through holes and is connected to the basic braking lever through a flexible connection structure. Two second through holes are opened on the web of the middle beam. The lever assembly passes through the second through holes and is connected to the drive assembly.

[0009] In any of the above embodiments, it is preferred that the pull rod assembly includes a first pull rod and a second pull rod, and the ends of the first pull rod and the second pull rod are respectively connected to the basic brake lever through two first through holes.

[0010] Preferably, in any of the above embodiments, the drive assembly includes a brake cylinder and a brake adjuster, and the brake cylinder is connected to the outer base frame of the middle beam via a brake cylinder hanger.

[0011] In any of the above embodiments, it is preferred that the lever assembly includes a front brake lever and a rear brake lever, one end of the front brake lever and the rear brake lever respectively passes through two second through holes and enters the web of the middle beam to connect with the first tie rod and the second tie rod, and the other end of the front brake lever and the rear brake lever are respectively connected to the brake cylinder and the fulcrum seat on the outside of the web of the middle beam.

[0012] Preferably, in any of the above embodiments, the two ends of the brake adjuster are connected to the front brake lever and the rear brake lever, respectively.

[0013] Preferably, in any of the above embodiments, two inspection ports are provided on the lower cover plate of the middle beam.

[0014] In any of the above embodiments, it is preferred that the two access ports are respectively located at the projection of the connection between the front brake lever and the first pull rod and at the projection of the connection between the rear brake lever and the second pull rod.

[0015] In any of the above embodiments, the preferred embodiment is that the soft connection structure includes a chain link, with U-shaped rings symmetrically arranged on both sides of the chain link. One U-shaped ring is connected to the first pull rod or the second pull rod, and the other U-shaped ring is connected to the basic brake lever.

[0016] As described above, the lightweight lever braking system of this utility model has the following beneficial effects:

[0017] 1. In this utility model, the brake lever assembly is arranged in the inner cavity of the middle beam, and the brake cylinder and brake adjuster are arranged on the outer side of the middle beam. The overall structure is compact, there is no conversion device, which greatly reduces the auxiliary parts of the braking system, reduces the vehicle's weight, and reduces costs.

[0018] 2. In this utility model, a soft connection structure is adopted between the brake lever assembly and the basic brake lever, which effectively reduces the loss of braking force during the movement. Attached Figure Description

[0019] Figure 1 This is a front view of the present invention.

[0020] Figure 2 The image shown is a top view of this utility model.

[0021] Component designation explanation

[0022] 1-First tie rod; 2-Second tie rod; 3-Front brake lever; 4-Rear brake lever; 5-Soft connection structure; 6-Basic brake lever; 7-Brake cylinder; 8-Brake adjuster; 9-Lower cover plate of middle beam; 91-First through hole; 92-Inspection port; 10-Web plate of middle beam; 101-Second through hole. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] Please see Figures 1 to 2 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0025] Please see Figure 1-2 This utility model provides a lightweight lever braking system, including a pull rod assembly and a lever assembly connected to each other. The pull rod assembly is disposed inside the web plate 10 of the middle beam. The bottom of the web plate 10 of the middle beam is connected to a lower cover plate 9 of the middle beam. The lower cover plate 9 of the middle beam has first through holes 91 symmetrically opened on both sides. The pull rod assembly passes through the first through holes 91 and is connected to the basic braking lever 6 through a flexible connection structure 5. The web plate 10 of the middle beam has two second through holes 101. The lever assembly passes through the second through holes 101 and is connected to the drive assembly.

[0026] In this embodiment, the narrow-gauge railway freight car includes a central beam, which comprises a central beam web 10 and a central beam lower cover plate 9 connected to the bottom of the central beam web 10. Two second through holes 101 and a first through hole 91 are respectively formed on the central beam web 10 and the central beam lower cover plate 9. A brake lever assembly is arranged inside the central beam web 10, and a drive assembly for moving the brake lever assembly is located outside the central beam web 10. Specifically:

[0027] The brake lever assembly includes a lever assembly and a lever assembly. The lever assembly includes a first lever 1 and a second lever 2. The first lever 1 and the second lever 2 are horizontally arranged inside the web of the central beam 10, and their vertical alignment is horizontal with the connection hole of the basic brake lever 6. One end of the first lever 1 and the second lever 2 are connected to the lever assembly, and the other end passes horizontally through the two first through holes 91 and is then connected to the basic brake lever 6.

[0028] The drive assembly includes a brake cylinder 7 and a brake adjuster 8. The brake cylinder 7 is connected to the outer base frame of the middle beam via a brake cylinder 7 hanger.

[0029] The lever assembly includes a front brake lever 3 and a rear brake lever 4. One end of the front brake lever 3 and the rear brake lever 4 passes through two second through holes 101 and enters the web plate 10 of the middle beam, where they are connected to the first tie rod 1 and the second tie rod 2 by round pins. The other end is connected to the brake cylinder 7 and the fulcrum seat on the outside of the web plate 10 of the middle beam by round pins. At the same time, the brake adjuster 8 is connected to the ends of the front brake lever 3 and the rear brake lever 4 located on the outside of the web plate 10 of the middle beam by round pins.

[0030] During braking, the piston rod of brake cylinder 7 extends, pushing the front brake lever 3. The front brake lever 3 is connected to the first pull rod 1, and the first pull rod 1 is connected to the front base brake lever 6. The front base brake lever 6 pushes the brake shoes to come into contact with the wheel.

[0031] As the piston of brake cylinder 7 continues to push out, the front brake lever 3 pulls the brake adjuster 8, which in turn pulls the second lever 2 via the rear brake lever 4. The second lever 2 is connected to the rear base brake lever 6, which in turn pushes the brake shoes to come into contact with the wheel, thus achieving vehicle braking.

[0032] When the brakes are released, the piston rod of the brake cylinder 7 retracts, and the front brake lever 3 and the rear brake lever 4 drive the first lever 1 and the second lever 2 to move in opposite directions, thereby releasing the vehicle's brakes.

[0033] Throughout the process, the braking system crosses the vehicle's center beam and connects to the bogies at both ends, forming part of the vehicle's overall braking system. Meanwhile, the brake lever assembly is located within the center beam's inner cavity, while the brake cylinder 7 and brake adjuster 8 are located on the outer side of the center beam. The overall structure is compact, without any switching devices, significantly reducing the number of auxiliary components in the braking system, lowering the vehicle's weight, and reducing costs.

[0034] In this embodiment, the first through hole 91 is an oblong hole, and the size of the oblong hole should be sufficient to ensure that the first pull rod 1 and the second pull rod 2 have enough working space.

[0035] The second through hole 101 should be able to meet the working space requirements of the front brake lever 3 and the rear brake lever 4 during operation, as well as the working space under extreme conditions such as vehicle wear. Its specific dimensions should be selected and adjusted according to the actual working conditions.

[0036] As a further description of the above embodiment, in order to facilitate assembly and maintenance, two inspection ports 92 are provided on the lower cover plate 9 of the middle beam. The two inspection ports 92 are respectively provided at the projection of the connection between the front brake lever 3 and the first pull rod 1 and at the projection of the connection between the rear brake lever 4 and the second pull rod 2.

[0037] As a further description of the above embodiment, in order to reduce the loss of braking force during vehicle movement, a soft connection structure 5 is used to connect the pull rod and the basic brake lever 6. The soft connection structure 5 includes a chain link, and U-shaped rings are symmetrically arranged on both sides of the chain link. One U-shaped ring is connected to the first pull rod 1 or the second pull rod 2, and the other U-shaped ring is connected to the basic brake lever 6.

[0038] In this embodiment, a soft connection structure 5 composed of chain links and U-shaped buckles is used between the tie rod and the basic brake lever 6. When the vehicle is on a curve, the soft connection structure 5 can compensate for the lateral displacement of the connection part caused by the mutual swing angle between the bogie and the car body, thereby reducing the efficiency loss of the connection structure and thus reducing the braking force loss during the movement.

[0039] In summary, the brake lever assembly of this invention is arranged inside the center beam cavity, while the brake cylinder and brake adjuster are arranged outside the center beam. The overall structure is compact, eliminating the need for a switching device, significantly reducing the number of auxiliary components in the braking system, lowering vehicle weight, and reducing costs. Simultaneously, it effectively reduces braking force loss during movement. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial applicability.

[0040] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A lightweight lever braking system, comprising a pull rod assembly and a lever assembly connected to each other, characterized in that: The tie rod assembly is located inside the web of the middle beam (10). The bottom of the web of the middle beam (10) is connected to the lower cover plate (9). The lower cover plate (9) has symmetrical first through holes (91) on both sides. The tie rod assembly passes through the first through hole (91) and is connected to the basic brake lever (6) through the soft connection structure (5). The web of the middle beam (10) has two second through holes (101). The lever assembly passes through the second through hole (101) and is connected to the drive assembly.

2. The lightweight lever braking system according to claim 1, characterized in that: The pull rod assembly includes a first pull rod (1) and a second pull rod (2), the ends of the first pull rod (1) and the second pull rod (2) being connected to the base brake lever (6) through two first through holes (91) respectively.

3. The lightweight lever braking system according to claim 2, characterized in that: The drive assembly includes a brake cylinder (7) and a brake adjuster (8), wherein the brake cylinder (7) is connected to the outer base frame of the middle beam via a brake cylinder hanger.

4. The lightweight lever braking system according to claim 3, characterized in that: The lever assembly includes a front brake lever (3) and a rear brake lever (4). One end of the front brake lever (3) and the rear brake lever (4) passes through two second through holes (101) and enters the web of the middle beam (10) to connect with the first tie rod (1) and the second tie rod (2). The other end of the front brake lever (3) and the rear brake lever (4) are connected to the brake cylinder (7) and the fulcrum seat on the outside of the web of the middle beam (10).

5. The lightweight lever braking system according to claim 4, characterized in that: The two ends of the brake adjuster (8) are connected to the front brake lever (3) and the rear brake lever (4) respectively.

6. The lightweight lever braking system according to claim 1, characterized in that: Two inspection ports (92) are also provided on the lower cover plate (9) of the middle beam.

7. The lightweight lever braking system according to claim 6, characterized in that: The two inspection ports (92) are respectively located at the projection of the connection between the front brake lever (3) and the first pull rod (1) and at the projection of the connection between the rear brake lever (4) and the second pull rod (2).

8. The lightweight lever braking system according to claim 2, characterized in that: The soft connection structure (5) includes a chain link, with U-shaped rings symmetrically arranged on both sides of the chain link. One U-shaped ring is connected to the first pull rod (1) or the second pull rod (2), and the other U-shaped ring is connected to the basic brake lever (6).

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