A shoe retaining structure and method for railway cars without a shoe latch

Abstract

The application discloses a brake shoe fixing structure and method without brake shoe bolt for railway freight cars, and belongs to the technical field of railway freight car brakes, which comprises an arc-shaped brake shoe, a hanging assembly and a locking structure are arranged on one side of the arc-shaped brake shoe, the hanging assembly is suspendedly installed on a brake shoe carrier, and the locking structure is clamped with the brake shoe carrier; the locking structure comprises a fixing portion, a locking portion and an unlocking portion which are sequentially fixedly connected; the fixing portion is a sheet-shaped structure extending from the side surface of the arc-shaped brake shoe, the locking portion is an arc-shaped sheet-shaped structure matched with a locking pin of the brake shoe carrier, so that the arc-shaped brake shoe can be locked on the brake shoe carrier, and the free end of the unlocking portion extends out of the outline of the brake shoe carrier, so that the arc-shaped brake shoe and the brake shoe carrier are convenient to unlock and disassemble. The application solves the problem that the brake shoe cannot be normally braked due to the brake shoe bolt in the existing brake shoe installation process.

Description

Technical Field

[0001] This invention belongs to the field of railway freight car brake technology, specifically relating to a brake shoe fixing structure and method without brake shoe pins for railway freight cars. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, the main method for installing brake shoes on railway freight cars is to connect the brake shoes to the brake shoe holder using pins. The brake shoes have lugs or fixing holes, and the brake shoe holders have corresponding connecting lugs. By passing a metal pin through the lug or lug, and using a cotter pin to prevent detachment, the brake shoes are securely connected to the brake shoe holders. This installation structure is simple and low-cost, and has long been widely used in railway freight car braking systems.

[0004] However, during maintenance, this connection method requires temporary storage stations for the pins. Due to their small size, large quantity, and frequent replacement, the pins are prone to loss, misplacement, or mixing without standardized storage stations, increasing management difficulty and parts wear. Furthermore, brake shoe pins are easily lost during train operation, leading to brake shoe detachment and braking failure. Continuous vibration, impact, and environmental corrosion can cause brake shoe pins and cotter pins to loosen, wear, or even detach. Once lost, the connection between the brake shoe and brake shoe support fails, and the brake shoe may deflect, detach, or fail to adhere to the wheel tread, directly causing braking failure. In severe cases, this affects the overall braking distance and driving safety. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a brake shoe fixing structure and method for railway freight cars without brake shoe pins, which solves the problem that the use of brake shoe pins during the existing brake shoe installation process can easily lead to the brake shoes failing to brake properly.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides a brake shoe fixing structure for railway freight cars without brake shoe pins, comprising: an arc-shaped brake shoe, wherein a hanging assembly and a locking structure are provided on one side of the arc-shaped brake shoe, the hanging assembly is suspended on the brake shoe support, and the locking structure is snapped into the brake shoe support; The locking structure includes a fixing part, a locking part, and an unlocking part that are fixedly connected in sequence. The fixing part is a plate-like structure extending from the side of the arc-shaped brake shoe. The locking part is an arc-shaped plate-like structure that is adapted to the locking pin of the brake shoe support, so that the arc-shaped brake shoe can be locked on the brake shoe support. The free end of the unlocking part extends out of the outline of the brake shoe support, so that the arc-shaped brake shoe and the brake shoe support can be easily unlocked and disassembled.

[0007] As a further implementation, the arc-shaped brake shoe includes a first brake shoe and a second brake shoe connected by a shoe nose. The shoe nose is arranged on the same side as the hanging assembly and the locking structure, respectively. The shoe nose is an elastic sheet structure, and a limit groove is provided at the position of the brake shoe support opposite to the shoe nose. The hanging assembly is disposed on the first brake shoe, and the locking structure is disposed on the second brake shoe.

[0008] As a further implementation, a first fixing seat is provided between the first brake shoe and the hanging assembly. The first fixing seat is provided with a first receiving groove for accommodating the upper support claw of the brake shoe support at a position opposite to the hanging assembly. The width of the first receiving groove is greater than the width of the hanging assembly.

[0009] As a further implementation, the brake shoe holder has two upper support claws, and the suspension assembly is an L-shaped hook with a chamfered free end, so that the suspension assembly can be easily attached to the connection between the upper support claws of the brake shoe holder.

[0010] As a further implementation, the second brake shoe has a second fixed seat, and the second fixed seat is provided with a second receiving groove for accommodating the lower support claw of the brake shoe support. The second receiving groove is arranged opposite to the locking structure.

[0011] As a further implementation, the brake shoe support has two lower support claws, and the locking pin is provided between the two lower support claws of the brake shoe support.

[0012] As a further implementation, a bending groove is provided between the first brake shoe and the second brake shoe; a collection groove is provided on both the first brake shoe and the second brake shoe.

[0013] As a further implementation, both the fixing part and the locking part are arc-shaped plate structures. One end of the fixing part is tangent to the side of the second brake shoe; the other end of the fixing part is connected to one end of the locking part, and the concave surface of the fixing part is tangent to the convex surface of the locking part.

[0014] As a further implementation, the unlocking part is fixedly connected to the other end of the locking part, and a chamfer is provided at the connection between the unlocking part and the locking part.

[0015] Secondly, the present invention also provides a connection method for a brake shoe fixing structure without brake shoe pins for railway freight cars, comprising the following steps: The arc-shaped brake shoe and the brake shoe support are set at a certain angle, and the hook of the suspension component is inserted into the connecting part on the brake shoe support; After the hook is inserted into the connecting part, the arc-shaped brake shoe is moved downward so that the connecting part hooks the arc-shaped brake shoe. When the brake shoe nose is aligned with the limit groove, push the arc-shaped brake shoe in the direction of the brake shoe support to engage the locking part with the locking pin, thus completing the installation of the arc-shaped brake shoe.

[0016] Compared with the prior art, the advantages and positive effects of this invention are: This invention suspends the curved brake shoe from a brake shoe support via a hanging assembly on one side, forming a support and positioning connection for the curved brake shoe. This allows the curved brake shoe to swing relative to the brake shoe support or adaptively conform to the wheel tread. Simultaneously, the locking structure engages with the brake shoe support via a snap-fit ​​mechanism. Once the curved brake shoe is in place, the locking structure, through a snap-fit, restricts the lateral or vertical displacement of the curved brake shoe relative to the brake shoe support, preventing the curved brake shoe from detaching or tilting due to vibration or braking forces during operation. This combination of hanging and snap-fit ​​structure enables rapid assembly and disassembly of the curved brake shoe, achieving fixation without brake shoe pins; the snap-fit ​​locking effectively prevents loosening and ensures proper positioning, avoiding accidental detachment during operation. The fixing part of the locking structure adopts a plate-like structure extending from the side of the arc-shaped brake shoe, so that the locking part and the brake shoe support are initially positioned. The locking part has an arc-shaped plate-like structure that matches the locking pin on the brake shoe support. After they are interlocked, the arc-shaped brake shoe is firmly locked to the brake shoe support by the limiting action of the locking pin. The free end of the unlocking part extends out of the contour of the brake shoe support, providing a force point for the unlocking operation when replacing the arc-shaped brake shoe, thereby quickly separating the arc-shaped brake shoe from the brake shoe support. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a structural diagram of the arc-shaped brake shoe and brake shoe support of the present invention; Figure 2 This is a diagram of the brake shoe fixing structure of the present invention; Figure 3 This is a structural diagram of the first brake shoe of the present invention; Figure 4 This is a structural diagram of the second brake shoe of the present invention.

[0019] In the figure: 1. Arc-shaped brake shoe; 2. Brake shoe support; 3. Suspension assembly; 4. Locking structure; 5. Shoe nose; 6. First fixing seat; 7. Second fixing seat; 8. First brake shoe; 9. Second brake shoe; 10. Collection groove; 11. First receiving groove; 12. Connecting part; 13. Locking pin; 14. Fixing part; 15. Locking part; 16. Unlocking part. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. Example 1 This embodiment discloses a brake shoe fixing structure for railway freight cars without brake shoe pins, such as... Figure 1 - Figure 4 As shown.

[0022] Currently, the main method for installing brake shoes on railway freight cars is to connect the brake shoes to the brake shoe holder using pins. The brake shoes have lugs or fixing holes, and the brake shoe holders have corresponding connecting lugs. By passing a metal pin through the lug or lug, and using a cotter pin to prevent detachment, the brake shoes are securely connected to the brake shoe holders. This installation structure is simple and low-cost, and has long been widely used in railway freight car braking systems.

[0023] However, during maintenance, this connection method requires temporary storage stations for the pins. Due to their small size, large quantity, and frequent replacement, the pins are prone to loss, misplacement, or mixing without standardized storage stations, increasing management difficulty and parts wear. Furthermore, brake shoe pins are easily lost during train operation, leading to brake shoe detachment and braking failure. Continuous vibration, impact, and environmental corrosion can cause brake shoe pins and cotter pins to loosen, wear, or even detach. Once lost, the connection between the brake shoe and brake shoe support fails, and the brake shoe may deflect, detach, or fail to adhere to the wheel tread, directly causing braking failure. In severe cases, this affects the overall braking distance and driving safety.

[0024] This embodiment proposes a brake shoe fixing structure for railway freight cars without brake shoe pins, such as... Figure 1 - Figure 4 As shown, it includes: an arc-shaped brake shoe 1, with a hanging assembly and a locking structure 4 on one side of the arc-shaped brake shoe 1. The hanging assembly is suspended on the brake shoe support 2, and the locking structure 4 is snapped into the brake shoe support 2.

[0025] Understandably, the arc-shaped brake shoe 1 is suspended from the brake shoe support 2 via a hanging assembly on one side, forming a support and positioning connection for the arc-shaped brake shoe 1. This allows the arc-shaped brake shoe 1 to swing relative to the brake shoe support 2 or adaptively conform to the wheel tread. Simultaneously, the locking structure 4 engages with the brake shoe support 2 using a snap-fit ​​mechanism. Once the arc-shaped brake shoe 1 is in place, the locking structure 4, through mechanical interlocking via buckles, protrusions, or elastic elements, restricts the lateral or vertical displacement of the arc-shaped brake shoe 1 relative to the brake shoe support 2, preventing it from detaching or tilting due to vibration or braking forces during operation. This combination of hanging and snap-fit ​​structure enables quick assembly and disassembly of the arc-shaped brake shoe 1, achieving fixation without brake shoe pins; the snap-fit ​​locking effectively prevents loosening and ensures proper positioning, avoiding accidental detachment during operation.

[0026] like Figure 3 As shown, the locking structure 4 includes a fixing part 14, a locking part 15, and an unlocking part 16 that are fixedly connected in sequence. The fixing part 14 is a sheet-like structure extending from the side of the arc-shaped brake shoe 1. The locking part 15 is an arc-shaped sheet-like structure that is adapted to the locking pin 13 of the brake shoe support 2, so that the arc-shaped brake shoe 1 can be locked on the brake shoe support 2. The free end of the unlocking part 16 extends out of the outline of the brake shoe support 2, so that the arc-shaped brake shoe 1 and the brake shoe support 2 can be easily unlocked and disassembled.

[0027] The fixing part 14 adopts a plate-like structure extending from the side of the arc-shaped brake shoe 1, so that the locking part 15 and the brake shoe support 2 are initially positioned. The locking part 15 is provided with an arc-shaped plate-like structure that matches the locking pin 13 on the brake shoe support 2. After they are interlocked, the arc-shaped brake shoe 1 is firmly locked on the brake shoe support 2 by the limiting action of the locking pin 13. The free end of the unlocking part 16 extends out of the contour of the brake shoe support 2, providing a force point for unlocking operation when replacing the arc-shaped brake shoe 1. When disassembly is required, the constraint between the locking pin 13 and the arc-shaped plate-like structure can be released by pressing or moving the unlocking part 16, thereby quickly separating the arc-shaped brake shoe 1 from the brake shoe support 2.

[0028] The cooperation of the fixing part 14 and the locking part 15 enables the arc-shaped brake shoe 1 to be reliably locked on the brake shoe support 2, preventing it from loosening or falling off during use and improving braking safety. At the same time, the outward design of the unlocking part 16 significantly reduces the difficulty of disassembly, and quick replacement can be completed without special tools or complicated operations.

[0029] like Figure 2 As shown, the arc-shaped brake shoe 1 includes a first brake shoe 8 and a second brake shoe 9 connected by a shoe nose 5. The shoe nose 5 is arranged on the same side as the hanging assembly and the locking structure 4. The shoe nose 5 is an elastic sheet structure. The brake shoe support 2 is provided with a limit groove at the position opposite to the shoe nose 5. The hanging assembly is set on the first brake shoe 8 and the locking structure 4 is set on the second brake shoe 9.

[0030] The arc-shaped brake shoe 1 adopts a split design, consisting of a first brake shoe 8 and a second brake shoe 9 connected by a shoe nose 5. The elastic shoe nose 5 can adaptively adjust the positions of the first brake shoe 8 and the second brake shoe 9 to reduce uneven wear. Simultaneously, by changing the relative position between the first brake shoe 8 and the second brake shoe 9 during installation, deformation of the locking structure 4 can be reduced. The shoe nose 5 is an elastic sheet structure, and the brake shoe support 2 has corresponding limiting grooves that mate with the shoe nose 5, reducing the impact of the first brake shoe 8 and the second brake shoe 9 on the hanging assembly and the locking structure 4.

[0031] During installation, the hanging assembly suspends and positions the first brake shoe 8, while the locking structure 4 is used to fix the second brake shoe 9. The elastic shoe nose 5 can undergo a certain elastic deformation in the limiting groove, which can absorb vibration and impact, ensure that the two brake shoes fit more evenly when braking, and facilitate disassembly and maintenance.

[0032] like Figure 3 As shown, a first fixing seat 6 is also provided between the first brake shoe 8 and the hanging assembly. The first fixing seat 6, positioned opposite the hanging assembly, has a first receiving groove 11 for accommodating the upper support claw of the brake shoe support 2. The width of the first receiving groove 11 is greater than the width of the hanging assembly. The brake shoe support 2 has two upper support claws, respectively installed on both sides of the hanging assembly. The suspension assembly 3 has an L-shaped hook with a chamfered free end, facilitating the connection 12 between the upper support claws of the brake shoe support 2.

[0033] Specifically, the first fixing seat 6 is positioned between the arc-shaped brake shoe 1 and the hanging assembly, and the first receiving groove 11 is used to accommodate the upper support claw of the brake shoe support 2. Since the width of the receiving groove is greater than the width of the hanging assembly, it provides installation space for the upper support claw and facilitates alignment during installation. The two upper support claws of the brake shoe support 2 are located on both sides of the hanging assembly, forming a fork-shaped structure that confines the hanging assembly in the middle, thus preventing lateral displacement. The L-shaped hooks are directly attached to the connecting part 12 between the upper support claws, eliminating the need for additional pins or bolts, making the installation of the arc-shaped brake shoe 1 more convenient.

[0034] The suspension assembly 3 is designed as an L-shaped hook with a chamfer at the free end, making it easier to insert the hook into and attach it to the connecting part 12 between the two upper support claws, so as to achieve a quick and self-guided attachment operation.

[0035] like Figure 4 As shown, the second brake shoe 9 has a second fixing seat 7, and the second fixing seat 7 is provided with a second receiving groove for accommodating the lower support claw of the brake shoe support 2. The second receiving groove is arranged opposite to the locking structure 4. The brake shoe support 2 has two lower support claws, and a locking pin 13 is provided between the two lower support claws of the brake shoe support 2 to cooperate with the locking structure 4 to fix the arc-shaped brake shoe 1.

[0036] The two lower support claws of the brake shoe support 2 engage with the second receiving groove on the second fixed seat 7 for positioning, while the locking pin 13 is positioned between the two lower support claws. When the arc-shaped brake shoe 1 is installed, the lower support claws are embedded in the second receiving groove, forming an initial limit; subsequently, the locking structure 4 interacts with the locking pin 13, and through the radial constraint of the locking pin 13, the second brake shoe 9 is firmly locked onto the brake shoe support 2. Through the mechanical interlocking of first engaging the groove and then locking the pin 13, the arc-shaped brake shoe 1 will not be displaced or fall off due to vibration or impact during braking.

[0037] like Figure 2 As shown, a bending groove is provided between the first brake shoe 8 and the second brake shoe 9; a collection groove 10 is provided on both the first brake shoe 8 and the second brake shoe 9.

[0038] Understandably, the first brake shoe 8 and the second brake shoe 9 are provided with bending grooves and connected by the shoe nose 5. On the one hand, the elastic shoe nose 5 can adaptively adjust the position of the first brake shoe 8 and the second brake shoe 9 to reduce uneven wear. On the other hand, during installation, the first brake shoe 8 and the second brake shoe 9 can be bent simultaneously in the direction of the bending groove. By changing the relative position between the first brake shoe 8 and the second brake shoe 9, the deformation of the locking structure 4 or the suspension assembly 3 can be reduced, which not only improves the installation efficiency and service life of the brake shoes.

[0039] In addition, the purpose of providing collection grooves 10 on both the first brake shoe 8 and the second brake shoe 9 is to collect the abrasive particles that fall off between the arc brake shoe 1 and the wheel through the collection grooves 10, and at the same time, to dissipate the heat of the arc brake shoe 1 during the friction process, so as to avoid the failure of the arc brake shoe 1 due to excessive temperature.

[0040] like Figure 4 As shown, both the fixing part 14 and the locking part 15 are arc-shaped plate structures. One end of the fixing part 14 is tangent to the side of the second brake shoe 9, which improves the connection reliability between the fixing part 14 and the second brake shoe 9 and reduces the risk of breakage when the fixing part 14 is deformed. The other end of the fixing part 14 is connected to one end of the locking part 15, and the concave surface of the fixing part 14 is tangent to the convex surface of the locking part 15.

[0041] Understandably, one end of the fixing part 14 is tangentially connected to the side of the second brake shoe 9, making the transition between the fixing part 14 and the arc-shaped brake shoe 1 smooth and reducing stress concentration points. When the arc-shaped brake shoe 1 is subjected to braking pressure or impact load, the fixing part 14, as the main force-bearing and force-transmitting component, guides the load to be evenly distributed along the arc surface through its arc-shaped structure; the locking part 15, through tangential connection, plays a role in positioning and limiting displacement, preventing the fixing part 14 from undergoing excessive torsional deformation or displacement under stress. The other end of the fixing part 14 is connected to one end of the locking part 15, and the concave surface of the fixing part 14 is tangential to the convex surface of the locking part 15, forming a continuous arc-shaped transition. Together, they form a low-stress, high-rigidity force transmission path through tangential connection.

[0042] As a further implementation, the other end of the unlocking part 16 is fixedly connected to the locking part 15, and a chamfer is provided at the connection between the unlocking part 16 and the locking part 15. The unlocking part 16 can be any structure, such as an L-shaped or a straight plate structure, so that the arc-shaped brake shoe 1 can be smoothly snapped into place during installation.

[0043] Example 2 This embodiment discloses a connection method for a brake shoe fixing structure without brake shoe pins for railway freight cars, comprising the following steps: The arc-shaped brake shoe 1 and the brake shoe support 2 are arranged at a set angle to facilitate the smooth insertion of the suspension assembly 3 into the connecting part 12, while ensuring that the other parts do not interfere with the brake shoe support 2; the hook of the suspension assembly 3 is inserted into the connecting part 12 on the brake shoe support 2 to achieve the initial suspension positioning of the arc-shaped brake shoe 1. After the hook is inserted into the connecting part 12, the arc-shaped brake shoe 1 moves downward, so that the connecting part 12 hooks the arc-shaped brake shoe 1, and the suspension assembly 3 can smoothly bear the initial suspension force formed by the weight of the arc-shaped brake shoe 1. During this process, the first brake shoe 8 and the second brake shoe 9 can be bent to a certain extent through the bending groove, which reduces the interference between the locking structure 4 and the brake shoe support 2, and also reduces the continuous deformation of the locking structure 4 during installation to avoid interference.

[0044] When the brake shoe nose 5 is aligned with the limiting groove, push the arc-shaped brake shoe 1 towards the brake shoe support 2 to engage the locking part 15 with the locking pin 13, completing the installation of the arc-shaped brake shoe 1. A chamfer is provided at the connection between the unlocking part 16 and the locking part 15, allowing the locking part 15 to smoothly slide along the arc-shaped surface towards the locking pin 13 during pushing, reducing jamming resistance. Because the locking part 15 is an arc-shaped plate structure with its convex surface tangent to the concave surface of the fixing part 14, this tangential connection ensures that the thrust experienced by the locking part 15 during engagement is evenly transmitted along the fixing part 14 to the second brake shoe 9, avoiding stress concentration at the connection point. After the locking part 15 engages with the locking pin 13, the arc-shaped structure also provides a self-locking tendency, making the arc-shaped brake shoe 1 less prone to loosening under braking vibration or reverse impact, thus achieving rapid installation while ensuring connection reliability and fracture resistance during use.

[0045] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A brake shoe fixing structure for railway freight cars without brake shoe pins, characterized in that, include: An arc-shaped brake shoe, wherein a hanging assembly and a locking structure are provided on one side of the arc-shaped brake shoe, the hanging assembly is suspended on the brake shoe support, and the locking structure is snapped into the brake shoe support; The locking structure includes a fixing part, a locking part, and an unlocking part that are fixedly connected in sequence. The fixing part is a plate-like structure extending from the side of the arc-shaped brake shoe. The locking part is an arc-shaped plate-like structure that is adapted to the locking pin of the brake shoe support, so that the arc-shaped brake shoe can be locked on the brake shoe support. The free end of the unlocking part extends out of the outline of the brake shoe support, so that the arc-shaped brake shoe and the brake shoe support can be easily unlocked and disassembled.

2. The brake shoe fixing structure for railway freight cars without brake shoe pins as described in claim 1, characterized in that, The arc-shaped brake shoe includes a first brake shoe and a second brake shoe connected by a shoe nose. The shoe nose is arranged on the same side as the hanging assembly and the locking structure, respectively. The shoe nose is an elastic sheet structure. A limit groove is provided at the position of the brake shoe support opposite to the shoe nose. The hanging assembly is arranged on the first brake shoe, and the locking structure is arranged on the second brake shoe.

3. The brake shoe fixing structure for railway freight cars without brake shoe pins as described in claim 2, characterized in that, A first fixing seat is also provided between the first brake shoe and the hanging assembly. The first fixing seat is provided with a first receiving groove for accommodating the upper support claw of the brake shoe support at a position opposite to the hanging assembly. The width of the first receiving groove is greater than the width of the hanging assembly.

4. The brake shoe fixing structure for railway freight cars without brake shoe pins as described in claim 3, characterized in that, The brake shoe support has two upper support claws, and the suspension assembly is an L-shaped hook with a chamfered free end to facilitate the suspension assembly to be attached to the connection between the upper support claws of the brake shoe support.

5. A brake shoe fixing structure for railway freight cars without brake shoe pins as described in claim 2, characterized in that, The second brake shoe has a second fixed seat, and the second fixed seat is provided with a second receiving groove for accommodating the lower support claw of the brake shoe support. The second receiving groove is arranged opposite to the locking structure.

6. The brake shoe fixing structure for railway freight cars without brake shoe pins as described in claim 5, characterized in that, The brake shoe support has two lower support claws, and the locking pin is provided between the two lower support claws of the brake shoe support.

7. A brake shoe fixing structure for railway freight cars without brake shoe pins as described in claim 5, characterized in that, A bending groove is provided between the first brake shoe and the second brake shoe; a collection groove is provided on both the first brake shoe and the second brake shoe.

8. A brake shoe fixing structure for railway freight cars without brake shoe pins as described in claim 1, characterized in that, Both the fixing part and the locking part are arc-shaped plate structures. One end of the fixing part is tangent to the side of the second brake shoe; the other end of the fixing part is connected to one end of the locking part, and the concave surface of the fixing part is tangent to the convex surface of the locking part.

9. A brake shoe fixing structure for railway freight cars without brake shoe pins as described in claim 8, characterized in that, The unlocking part is fixedly connected to the other end of the locking part, and a chamfer is provided at the connection between the unlocking part and the locking part.

10. A connection method for a brake shoe fixing structure without brake shoe pins for railway freight cars as described in any one of claims 1-9, characterized in that, Includes the following steps: The arc-shaped brake shoe and the brake shoe support are set at a certain angle, and the hook of the suspension component is inserted into the connecting part on the brake shoe support; After the hook is inserted into the connecting part, the arc-shaped brake shoe is moved downward so that the connecting part hooks the arc-shaped brake shoe. When the brake shoe nose is aligned with the limit groove, push the arc-shaped brake shoe in the direction of the brake shoe support to engage the locking part with the locking pin, thus completing the installation of the arc-shaped brake shoe.

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