Friction performance testing device for point switch

Abstract

The utility model belongs to the technical field of machine part performance testing, and relates to a friction performance testing device for a point switch. According to the utility model, the built-in magnet of the connecting rod is in magnetic connection with the point switch and the friction force tester, so that the binding force and the positioning precision between equipment are remarkably improved; meanwhile, the connecting rod is tightly matched with the square output shaft of the friction force tester and the switch machine through the adaptive interface, and compared with a traditional circular shaft transmission structure, the idle running risk of the shaft system is effectively eliminated, so that the torque transmission efficiency is effectively improved. According to the utility model, not only is the complex mechanical fixing process in the traditional test simplified, but also the continuity and accuracy of data acquisition in the test process are ensured through enhanced system stability, and a reliable test platform is provided for friction characteristic analysis of key components of railway signal equipment.

Description

A device for testing the friction performance of a switch machine Technical Field

[0001] This utility model belongs to the field of mechanical component performance testing technology, and relates to a device for testing the friction performance of a switch machine. Background Technology

[0002] In railway transportation systems, switch machines are core equipment for enabling train track switching, and their operational stability directly affects the safety and reliability of track changing. To ensure the long-term stable operation of switch machines, it is necessary to conduct precise tests on their internal friction performance regularly. However, the connection and compatibility between existing friction testers and the switch machines under test has long been a technical bottleneck, mainly due to the non-standardized design of the front and rear interfaces of the switch machines, resulting in a lack of directly compatible universal connection devices on the market.

[0003] Currently, the common connection technology for the shaft output end uses a coupling structure, which mechanically couples the input shaft of the tester with the output shaft of the switch machine and relies on screws for locking. This traditional solution has significant drawbacks in practical applications: First, the installation process requires repeated adjustments to the coupling position and manual tightening of screws, which is cumbersome and time-consuming, severely impacting testing efficiency. Second, the screw-locking method is prone to loosening under long-term vibration or high-load conditions, leading not only to decreased connection stability and distorted test data but also the potential safety risk of accidental equipment detachment. Furthermore, the diversity of non-standard interfaces further exacerbates the adaptation difficulty; existing coupling structures cannot cover the compatibility requirements of different interface specifications, necessitating a dedicated adapter solution that is efficient, reliable, and highly adaptable.

[0004] In summary, existing technologies, due to poor interface compatibility, operational complexity, and safety hazards, are insufficient to meet the demands for precision and efficiency in switch machine friction testing. Therefore, developing a switch machine friction performance testing device has become a key technological breakthrough direction for improving testing efficiency and data reliability. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art and provide a switch machine friction performance testing device that can effectively solve the connection problem between the friction tester and the tested equipment, and achieve faster and more accurate measurement.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a device for testing the friction performance of a switch machine, including a friction force tester and a connecting rod; one end of the connecting rod is connected to the friction force tester, and the other end is connected to the switch machine; a magnet is installed inside the connecting rod; the output shaft of the friction force tester is a square shaft.

[0008] Preferably, the connecting rod includes a test end, a connecting rod body, and a test end connected in sequence; the test end has a square groove inside, the size of which matches the size of the square shaft; the test end is connected to the output shaft; and the test end is connected to the switch machine.

[0009] Preferably, the tested end has a groove inside that corresponds to the output end of the switch machine.

[0010] Preferably, the inner wall of the groove is provided with a pattern.

[0011] Preferably, a buffer pad is provided between the tested end and the switch machine.

[0012] Preferably, a buffer pad is provided between the test end and the output shaft.

[0013] Preferably, magnets are provided at the bottom of both the test end and the bottom of the tested end.

[0014] Preferably, the main body of the connecting rod is a cylinder.

[0015] Preferably, the inner wall of the square groove is provided with a pattern.

[0016] Preferably, the connecting rod is made of pre-hardened plastic mold steel.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The connecting rod, with its built-in magnet, forms a magnetic connection with the switch machine and friction tester, significantly improving the bonding force and positioning accuracy between the devices. Simultaneously, the connecting rod uses an adapter interface to tightly engage with the square output shaft of the friction tester and the switch machine. Compared to traditional circular shaft drive structures, this effectively eliminates the risk of shaft idling and significantly improves torque transmission efficiency. This innovative connection method not only simplifies the complex mechanical fixing process in traditional testing but also ensures the continuity and accuracy of data acquisition during testing through enhanced system stability, providing a reliable testing platform for the frictional characteristic analysis of key components of railway signaling equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 is a schematic diagram of the structure of a switch machine friction performance testing device according to the present invention;

[0021] Figure 2 is a schematic diagram of the connecting rod of this utility model;

[0022] Figure 3 is a cross-sectional view of the connecting rod of this utility model;

[0023] Figure 4 is a schematic diagram of the friction force tester of this utility model.

[0024] The components include: 1. Friction tester; 2. Connecting rod; 21. Test end; 22. Connecting rod body; 23. Tested end; 3. Switch machine; 4. Output shaft; 5. Magnet. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings:

[0032] This utility model provides a device for testing the friction performance of a switch machine, as shown in Figures 1 and 2, including a friction tester 1 and a connecting rod 2; one end of the connecting rod 2 is connected to the friction tester 1, and the other end is connected to the switch machine 3; a magnet 5 is provided inside the connecting rod 2; the output shaft 4 of the friction tester 1 is a square shaft.

[0033] This invention utilizes a specially designed connecting rod 2 to achieve seamless connection between the friction tester 1 and the switch machine 3. The connecting rod 2, via a built-in magnet 5, forms a magnetic connection with both the switch machine 3 and the friction tester 1, significantly improving the bonding force and positioning accuracy between the devices. Simultaneously, the connecting rod 2 employs an adapter interface that tightly engages with the square output shaft 4 of the friction tester 1 and the switch machine 3. Compared to traditional circular shaft transmission structures, this effectively eliminates the risk of shaft idling and significantly improves torque transmission efficiency. This connection method not only simplifies the complex mechanical fixing process in traditional testing but also ensures the continuity and accuracy of data acquisition during testing through enhanced system stability, providing a reliable testing platform for analyzing the frictional characteristics of key components in railway signaling equipment.

[0034] As shown in Figures 3 and 4, the connecting rod 2 includes a test end 21, a connecting rod body 22, and a test end 23 connected in sequence; the connecting rod body 22 is a cylinder, and the test end 21 has a square groove inside, the size of which matches the size of the square shaft; the test end 21 is connected to the output shaft 4; the test end 23 has a groove inside that corresponds to the output end of the switch machine 3.

[0035] The test end 21 has a high-precision square groove machined inside. Its inner wall size forms a clearance fit with the square output shaft 4 of the friction tester 1. The geometric self-locking principle eliminates circumferential slippage in the shaft transmission and ensures lossless torque transmission. The main body 22 of the connecting rod is a transition zone structure. The end of the test end 23 is designed with a customized groove. The contour of the groove complements the flange structure of the output part of the switch machine 3. It adopts a plug-in connection and is fixed with a limit pin. It can accurately transmit the mechanical action output by the switch machine 3, which can achieve rapid alignment and installation and avoid the eccentric load caused by traditional bolt fixing.

[0036] The inner wall of the groove is patterned, and the inner wall of the square groove is also patterned. On the one hand, by increasing the roughness of the contact surface, the static friction between the groove and the output flange of the switch machine 3 and the output shaft 4 is significantly improved, preventing relative displacement during high-frequency operation or sudden load changes, and ensuring the synchronization and stability of power transmission. On the other hand, the regular arrangement of the pattern can also guide the uniform distribution of stress, avoiding local deformation caused by stress concentration, and further ensuring the reliability and adaptability of the transmission structure.

[0037] A buffer pad is provided between the tested end 23 and the switch machine 3, and a buffer pad is provided between the test end 21 and the output shaft 4. The buffer pads can reduce measurement errors caused by vibration and impact, ensure more accurate and reliable measurement data, and improve the accuracy and stability of test results. At the same time, the buffer pads can effectively isolate and alleviate friction and collision between equipment components, reduce wear, protect key components of the switch machine 3 and the output shaft 4, and reduce maintenance costs and failure rate.

[0038] Magnets 5 are provided at the bottom of both the test end 21 and the bottom of the tested end 23. The magnets 5 can quickly and stably connect the test end 21 and the tested end 23 to the friction tester 1 and the switch machine 3 respectively through magnetic attraction, reducing displacement or loosening caused by vibration or external forces, thereby improving the stability and reliability of the testing process. Compared with traditional mechanical fixing methods (such as screws or clips), the magnet 5 connection requires no physical contact or friction, effectively reducing mechanical wear between equipment components, extending equipment lifespan, and simplifying the installation and disassembly process, improving operational efficiency. It is especially suitable for scenarios requiring frequent replacement or adjustment of testing equipment.

[0039] The connecting rod 2 is made of pre-hardened plastic mold steel (such as 718H pre-hardened material). Pre-hardened plastic mold steel has high hardness and wear resistance, and can withstand large mechanical loads and friction, ensuring that the connecting rod 2 is not easily deformed or worn during long-term use, thus extending its service life.

[0040] The friction performance testing device for switch machines provided by this utility model achieves rapid adsorption and precise positioning of the friction tester 1 and the switch machine 3 through a magnetic connecting rod 2. Combined with the clearance fit between the square output shaft 4 and the high-precision square groove, as well as the anti-slip pattern design, it effectively eliminates the risk of shaft idling and ensures lossless torque transmission. Buffer pads isolate vibration and impact, improving data acquisition accuracy and protecting key components. The connecting rod 2 is made of pre-hardened plastic mold steel, combining high strength, wear resistance, and lightweight advantages. This utility model simplifies the traditional mechanical fixing process, significantly improves disassembly and assembly efficiency, system stability, and testing reliability, providing an efficient and durable testing platform for the friction performance analysis of railway signaling equipment.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for testing the friction performance of a switch machine, characterized in that, It includes a friction tester (1) and a connecting rod (2); one end of the connecting rod (2) is connected to the friction tester (1), and the other end is connected to the switch machine (3); a magnet (5) is provided inside the connecting rod (2); the output shaft (4) of the friction tester (1) is a square shaft.

2. The device for testing the friction performance of a switch machine according to claim 1, characterized in that, The connecting rod (2) includes a test end (21), a connecting rod body (22), and a test end (23) connected in sequence; the test end (21) has a square groove inside, and the size of the square groove matches the size of the square shaft; the test end (21) is connected to the output shaft (4); the test end (23) is connected to the switch machine (3).

3. The device for testing the friction performance of a switch machine according to claim 2, characterized in that, The measured end (23) has a groove inside that corresponds to the output end of the switch machine (3).

4. The device for testing the friction performance of a switch machine according to claim 3, characterized in that, The inner wall of the groove is decorated with patterns.

5. The device for testing the friction performance of a switch machine according to claim 2, characterized in that, A buffer pad is provided between the tested end (23) and the switch machine (3).

6. The device for testing the friction performance of a switch machine according to claim 2, characterized in that, A buffer pad is provided between the test end (21) and the output shaft (4).

7. The device for testing the friction performance of a switch machine according to claim 2, characterized in that, Magnets (5) are provided at the bottom of both the test end (21) and the test end (23).

8. The device for testing the friction performance of a switch machine according to claim 2, characterized in that, The main body (22) of the connecting rod is a cylinder.

9. The device for testing the friction performance of a switch machine according to claim 1, characterized in that, The inner wall of the square groove is decorated with patterns.

10. The device for testing the friction performance of a switch machine according to claim 1, characterized in that, The connecting rod (2) is made of pre-hardened plastic mold steel.

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