Clamp for testing buckling pressure of elastic strip
By designing a spring clip pressure testing fixture that includes a base, a fixed seat, and a rod clamp, the problem of the lack of accurate measurement of spring clip pressure in the existing technology is solved, and efficient, accurate test results and adaptability are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-04-03
AI Technical Summary
The current technology lacks a specialized clamp for accurately measuring the clamping force of railway elastic clips, which affects the prediction of clip life and the safe operation of vehicles.
A pressure testing fixture for a spring clip is designed, including a base, a fixed seat, and a rod clamp. The rod clamp holds one end of the spring clip, and the connection mechanism, positioning mechanism, and anti-slip texture ensure stable and accurate clamping.
It improves the automation and accuracy of spring bar testing, ensures the reliability and repeatability of test results, and adapts to spring bars of different specifications and types.
Smart Images
Figure CN224081318U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of spring clip testing fixtures, specifically relating to a spring clip buckle pressure testing fixture. Background Technology
[0002] With the continuous improvement of national railway technology, higher requirements have been placed on railway fasteners, making the effective fastening of rails particularly important. Concrete sleepers, due to their heavy weight and high rigidity, have high requirements for the performance of their fastener systems, with strict requirements on fastening pressure, elasticity, and adjustability. Concrete sleeper fasteners should possess the following properties: 1) Sufficient fastening pressure. This is a crucial guarantee for the connection between the rail and the sleeper. Sufficient fastening pressure means that when the rail bends and rotates, the rail base should not experience longitudinal, lateral, or vertical displacement along the track bed; that is, the longitudinal resistance of the fastener must be greater than the longitudinal resistance of the track bed. In my country, the longitudinal resistance of each sleeper is approximately 10kN, and the longitudinal resistance of a set of fasteners should ideally be between 15kN and 25kN, corresponding to a fastening pressure of approximately 10kN. At the same time, the fastening pressure should not be too high, otherwise the elasticity of the fastener will decrease sharply, affecting its service life. 2) Appropriate elasticity. Concrete sleepers are much stiffer than wooden sleepers; therefore, the elasticity of concrete sleeper tracks in the vertical and horizontal directions is mainly provided by the fasteners. Appropriate elasticity can reduce the pressure of the load on the track bed, reduce the unsprung vibration acceleration, and extend the service life of components. The elasticity of the fasteners is mainly provided by components such as rubber pads and spring clips. 3) It has a certain gauge and leveling adjustment range. The bolt hole spacing and rail groove width of the concrete sleepers are fixed. When the gauge of the curved track needs to be widened or the gauge needs to be increased due to rail wear, the gauge needs to be adjusted through fasteners. During maintenance, spring clips are also needed to adjust the levelness of the two rails.
[0003] Different types of fastening systems specify different technical indicators for fastener assembly, vibration damping performance, insulation performance, rail position adjustment capability, fastening force, elastic travel, and rail longitudinal resistance. As a component in the fastening system connecting the rail and track, the elastic clip's fastening force plays a crucial role in the safe operation of the vehicle. Therefore, accurate measurement of the elastic clip's fastening force value on the operating line is essential for predicting its lifespan. Due to the irregular shape of the elastic clip, a specialized clamp is urgently needed for testing. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a spring clip buckle pressure testing fixture. The spring clip is placed on a fixed base, and one end of the spring clip is clamped by a rod clamp, which can fix the spring clip and facilitate the testing of the spring clip buckle pressure.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a spring clip pressure testing fixture for testing spring clip pressure, comprising a base, a lower connector at the bottom of the base, a fixing seat for fixing the spring clip on the base, a rod clamp for clamping the spring clip rod above the fixing seat, an upper connector connected to the rod clamp, and the rod clamp comprising two hinged first clamping arms and second clamping arms, with a connecting mechanism connected to the ends of the first clamping arms and second clamping arms.
[0006] Preferably, the connecting mechanism includes a fixed shaft disposed at the bottom of the upper connector, on which a first connecting arm and a second connecting arm are rotatably connected and hinged to each other, and the ends of the first connecting arm and the second connecting arm away from the fixed shaft are respectively hinged to the ends of the first clamping arm and the second clamping arm.
[0007] Preferably, a fixing block is provided on one side of both the first clamping arm and the second clamping arm, and a return spring is connected between the two fixing blocks. A positioning mechanism is provided on the other side of the first clamping arm and the second clamping arm.
[0008] Preferably, the positioning mechanism includes a first positioning pin and a second positioning pin respectively disposed on the first clamping arm and the second clamping arm. A positioning rod is rotatably connected to the first positioning pin, and a sliding groove is provided at the end of the positioning rod away from the first positioning pin. The sliding groove is slidably connected to the second positioning pin.
[0009] Preferably, a handle is provided on the outside of the positioning rod.
[0010] Preferably, the inner sides of the clamping ends of the first clamping arm and the second clamping arm are provided with anti-slip texture.
[0011] Preferably, the fixing base includes a fixing plate movably mounted on the base, and an arched fixing block is installed on the fixing plate by bolts.
[0012] Preferably, the base is provided with a slide rail, and the bolt nuts can slide and adjust their position within the slide rail. The fixing plate is fixedly installed on the base by the cooperation of the bolts and the slide rail.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The elastic clip pressure testing fixture proposed by this utility model can fix the elastic clip by clamping one end of the rod with the rod clamp, which is convenient for testing the elastic clip. It not only improves the automation level and working efficiency of the testing fixture, but also ensures that the pressure applied by the rod clamp to the elastic clip during the test is always kept within the preset range, thereby improving the accuracy and repeatability of the test.
[0014] Additional aspects and advantages of this invention will be set forth in the central part of the description which follows, and some will be obvious from the description or may be learned by practice of the invention. Attached Figure Description
[0015] Figure 1 A schematic diagram of the three-dimensional structure of a spring clip pressure testing fixture. Figure 1 .
[0016] Figure 2 A schematic diagram of the three-dimensional structure of a spring clip pressure testing fixture. Figure 2 .
[0017] Figure 3 This is a side view of a spring clip pressure testing fixture.
[0018] Figure 4 This is a cross-sectional view of a spring clip pressure testing fixture.
[0019] Figure 5 A schematic diagram of the three-dimensional structure of a spring clip pressure testing fixture. Figure 1 .
[0020] Figure 6 A schematic diagram of the three-dimensional structure of a spring clip pressure testing fixture. Figure 2 .
[0021] In the diagram: 1. Base; 11. Slide rail; 2. Fixed seat; 21. Fixed plate; 22. Arched fixed block; 3. Rod clamp; 31. First clamping arm; 32. Second clamping arm; 33. Fixed block; 4. Lower connector; 5. Upper connector; 6. Connecting mechanism; 61. Fixed shaft; 62. First connecting arm; 63. Second connecting arm; 7. Return spring; 8. Positioning mechanism; 81. First positioning pin; 82. Second positioning pin; 83. Positioning rod; 831. Handle; 84. Sliding groove; 9. Spring bar. Detailed Implementation
[0022] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.
[0023] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a spring clip buckle pressure testing fixture is used to test the buckle pressure of a spring clip 9. It includes a base 1, a lower connector 4 at the bottom of the base 1, a fixing seat 2 for fixing the spring clip 9 on the base 1, a rod clamp 3 for clamping the rod of the spring clip 9 above the fixing seat 2, an upper connector 5 connected to the rod clamp 3, and the rod clamp 3 includes two hinged first clamping arms 31 and second clamping arms 32. The ends of the first clamping arms 31 and the second clamping arms 32 are connected to a connecting mechanism 6.
[0024] This utility model discloses a spring clip pressure testing fixture, specifically designed for testing the mechanical properties of spring clip fasteners used in railway or other track systems. The base 1 is the fundamental support structure of the entire testing fixture, typically made of high-strength, wear-resistant materials to ensure stability and durability during testing. A lower connector 4 is provided at the bottom of the base 1, facilitating the installation of the rod clamp 3 onto the worktable of the testing equipment, and also facilitating the connection of sensors or transmission devices for accurate measurement and application of the required pressure.
[0025] On the upper surface of the base 1, a fixing seat 2 is arranged for fixing the spring clip 9. The design of the fixing seat 2 fully considers the structural characteristics of the spring clip and the testing requirements. Through a precise positioning and locking mechanism, it can ensure that the spring clip will not be displaced or loosened during the test, thereby ensuring the accuracy and reliability of the test results.
[0026] To hold the rod portion of the spring clip 9, a rod clamp 3 is provided above the fixing base 2. The rod clamp 3 consists of two clamping arms, a first clamping arm 31 and a second clamping arm 32, connected by a hinge mechanism. When pressure is applied, the rod clamp 3 can clamp the rod of the spring clip 9 evenly and stably, and can also be adjusted to a certain extent according to the actual size of the spring clip 9 to adapt to the testing requirements of different specifications and types of spring clips 9.
[0027] The rod clamp 3 is also connected to an upper connector 5, which not only facilitates the connection of the rod clamp 3 to the pressure application device of the test equipment, but also allows for further optimization of the clamping effect and pressure distribution of the rod clamp 3 on the spring bar 9 by adjusting the position and angle of the upper connector 5.
[0028] A connecting mechanism 6 is connected to the ends of the first clamping arm 31 and the second clamping arm 32 of the rod clamp 3. The connecting mechanism 6 is designed to further enhance the clamping capacity of the rod clamp 3 and to achieve flexible clamping of spring bars 9 of different specifications by adjusting its internal structure or tightness. In addition, the connecting mechanism 6 may also include a locking device to ensure that the clamping arms will not be accidentally released due to external force during the test.
[0029] This spring clip pressure testing fixture, through its meticulous design and ingenious construction, achieves accurate testing of the pressure of 9 spring clips. The close cooperation and efficient coordination between its various components ensure the accuracy and reliability of the test results.
[0030] Combination Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the connecting mechanism 6 includes a fixed shaft 61 disposed at the bottom of the upper connector 5. A first connecting arm 62 and a second connecting arm 63 are rotatably connected to the fixed shaft 61 and are hinged to each other. The ends of the first connecting arm 62 and the second connecting arm 63 away from the fixed shaft 61 are respectively hinged to the ends of the first clamping arm 31 and the second clamping arm 32.
[0031] Specifically, the connecting mechanism 6 ensures the stability and accuracy of the rod clamp during testing. This connecting mechanism 6 mainly includes a fixed shaft 61 located at the bottom of the upper connector 5, which not only provides stable support for the entire connecting mechanism but also allows subsequent rotation and hinge actions to be smoothly achieved.
[0032] A first connecting arm 62 and a second connecting arm 63 are rotatably connected to a fixed shaft 61. The first connecting arm 62 and the second connecting arm 63 are connected by a hinge mechanism, enabling them to rotate synchronously under the drive of the fixed shaft 61. This not only enhances the flexibility and response speed of the connecting mechanism, but also allows the rod clamp 3 to apply pressure more evenly and stably when clamping the spring bar 9.
[0033] The ends of the first connecting arm 62 and the second connecting arm 63, away from the fixed shaft 61, are hinged to the ends of the first clamping arm 31 and the second clamping arm 32, respectively. This not only achieves close linkage between the connecting mechanism 6 and the rod clamp 3, but also allows the rod clamp 3 to adaptively adjust according to the actual size and shape of the elastic bar 9 during clamping. When the connecting mechanism 6 receives a test command, it drives the first connecting arm 62 and the second connecting arm 63 to rotate via the fixed shaft 61, thereby causing the first clamping arm 31 and the second clamping arm 32 to perform clamping or releasing actions.
[0034] During the clamping process, the first clamping arm 31 and the second clamping arm 32, driven by the connecting mechanism 6, gradually approach the rod of the spring clip 9 until it is firmly clamped onto the fixed base 2. At this time, the testing equipment can apply a preset pressure to the rod clamp through the upper connector 5 to simulate the force situation of the spring clip 9 in actual use. After the test, the connecting mechanism 6 will drive the first connecting arm 62 and the second connecting arm 63 to rotate again, so that the first clamping arm 31 and the second clamping arm 32 gradually release the spring clip 9, thereby completing the entire test process.
[0035] Combination Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, a fixing block 33 is provided on one side of the first clamping arm 31 and the second clamping arm 32, and a return spring 7 is connected between the two fixing blocks 33. A positioning mechanism 8 is provided on the other side of the first clamping arm 31 and the second clamping arm 32.
[0036] Combination Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the positioning mechanism 8 includes a first positioning pin 81 and a second positioning pin 82 respectively disposed on the first clamping arm 31 and the second clamping arm 32. A positioning rod 83 is rotatably connected to the first positioning pin 81. A sliding groove 84 is provided at the end of the positioning rod 83 away from the first positioning pin 81. The sliding groove 84 is slidably connected to the second positioning pin 82.
[0037] Combination Figure 1 , Figure 4 and Figure 6 As shown, a handle 831 is provided on the outer side of the positioning rod 83.
[0038] Specifically, the design of the first clamping arm 31 and the second clamping arm 32 not only considers the stability and flexibility of clamping, but also fully considers the convenience and safety of operation. Fixing blocks 33 are provided on one side of the first clamping arm 31 and the second clamping arm 32. These two fixing blocks 33 not only serve as connections and supports, but also facilitate the installation of the return spring 7. The return spring 7, as an important elastic element, is connected between the two fixing blocks 33, ensuring that after the clamping action is completed, or after the test, the first clamping arm 31 and the second clamping arm 32 can automatically return to their initial positions, preparing for the next test.
[0039] In addition to the return spring 7, a positioning mechanism 8 is designed on the other side of the first clamping arm 31 and the second clamping arm 32. This ensures that the first clamping arm 31 and the second clamping arm 32 can be accurately positioned in the predetermined position during the clamping process, thereby guaranteeing the accuracy and reliability of the test.
[0040] The positioning mechanism 8 includes a first positioning pin 81 and a second positioning pin 82 respectively disposed on the first clamping arm 31 and the second clamping arm 32. The first positioning pin 81 and the second positioning pin 82 not only serve as key components of the positioning mechanism, but also ensure the overall stability and reliability of the positioning mechanism 8 through their precise dimensions and positional relationship. A positioning rod 83 is rotatably connected to the first positioning pin 81, allowing the positioning rod 83 to rotate within a certain range to adapt to the testing requirements of spring bars 9 of different sizes and shapes.
[0041] A sliding groove 84 is formed at the end of the positioning rod 83 furthest from the first positioning pin 81, creating a sliding connection with the second positioning pin 82. When the positioning rod 83 rotates, the sliding groove 84 slides along the second positioning pin 82, thereby achieving relative positioning between the first clamping arm 31 and the second clamping arm 32. This not only improves the flexibility and adaptability of the positioning mechanism 8 but also ensures the stability and accuracy of the positioning process.
[0042] For ease of operation and maintenance, a handle 831 is provided on the outer side of the positioning rod 83. This allows the operator to easily grasp the handle 831 and rotate and adjust the positioning rod 83, thereby achieving precise positioning of the first clamping arm 31 and the second clamping arm 32. At the same time, the material and shape of the handle 831 have also been carefully designed to ensure comfort and durability during use.
[0043] Combination Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, anti-slip textures are provided on the inner sides of the clamping ends of the first clamping arm 31 and the second clamping arm 32.
[0044] Specifically, the first clamping arm 31 and the second clamping arm 32 are key components in the pressure testing fixture for the spring clip 9, and the design of their clamping ends directly affects the clamping effect and the accuracy of the test. To ensure that the spring clip 9 can be firmly and stably clamped during the test, anti-slip textures are provided on the inner side of the clamping ends of the first clamping arm 31 and the second clamping arm 32.
[0045] In practical applications, the anti-slip texture is highly effective. As the first clamping arm 31 and the second clamping arm 32 gradually approach the spring clip 9 under the drive of the connecting mechanism 6, the anti-slip texture will make close contact with the rod of the spring clip 9, forming a firm clamping effect. Even if the spring clip 9 is subjected to large pressure or vibration during the test, the anti-slip texture can ensure that the spring clip 9 always remains in the predetermined position and will not move or deform due to force.
[0046] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the fixed base 2 includes a fixed plate 21 movably mounted on the base 1, and an arched fixed block 22 is installed on the fixed plate 21 by bolts.
[0047] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a slide rail 11 is provided on the base 1, and the bolt cap can slide and adjust its position within the slide rail 11. The fixing plate 21 is fixedly installed on the base 1 by the cooperation of the bolt and the slide rail 11.
[0048] Specifically, the mounting base 2 ensures the stability and accuracy of the spring clip 9 during testing. The mounting base 2 mainly includes a mounting plate 21 movably mounted on the base 1, and an arched fixing block 22 bolted to the mounting plate 21. The mounting plate 21, as the basic support structure of the mounting base 2, is made of high-strength, wear-resistant material to ensure stable clamping performance during long-term use. Furthermore, the mounting plate 21 can be flexibly adjusted according to testing requirements to accommodate tests of different specifications and types of spring clips 9.
[0049] An arched fixing block 22 is bolted onto the fixing plate 21. The design of the arched fixing block 22 is inspired by the stability and load-bearing capacity of an arch structure, effectively securing the elastic bar 9 to the fixing seat 2 and preventing it from moving or deforming during testing. Furthermore, the material and shape of the arched fixing block 22 have been carefully selected and designed to ensure a tight fit with the elastic bar 9, providing uniform clamping force.
[0050] To further improve the stability and flexibility of the mounting base 2, a slide rail 11 is provided on the base 1. This allows the bolt nuts to slide and adjust their position within the slide rail 11, thus achieving precise positioning of the mounting plate 21 on the base 1. When the position of the mounting base 2 needs to be adjusted, the operator simply loosens the bolts and slides the nuts along the slide rail 11 to move the mounting plate 21 to the desired position. After adjustment, tightening the bolts secures the mounting plate 21 to the base 1 through the cooperation of the bolts and the slide rail 11. This not only improves the stability and flexibility of the mounting base 2 but also makes it easier for the operator to complete the pre-test preparation work.
[0051] This invention represents a preferred embodiment of the present invention, but its scope of protection is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this invention, shall be covered within the scope of protection of this invention.
Claims
1. A spring clip buckle pressure testing fixture for testing the buckle pressure of a spring clip (9), comprising a base (1), a lower connector (4) provided at the bottom of the base (1), a fixing seat (2) for fixing the spring clip (9) provided on the base (1), a rod clamp (3) for clamping the rod body of the spring clip (9) provided above the fixing seat (2), and an upper connector (5) connected to the rod clamp (3), characterized in that, The rod clamp (3) includes two hinged first clamping arms (31) and second clamping arms (32), and the ends of the first clamping arms (31) and second clamping arms (32) are connected to a connecting mechanism (6); The connecting mechanism (6) includes a fixed shaft (61) disposed at the bottom of the upper connector (5). A first connecting arm (62) and a second connecting arm (63) are rotatably connected to the fixed shaft (61) and are hinged to each other. The ends of the first connecting arm (62) and the second connecting arm (63) away from the fixed shaft (61) are respectively hinged to the ends of the first clamping arm (31) and the second clamping arm (32).
2. The spring clip pressure testing fixture according to claim 1, characterized in that, A fixing block (33) is provided on one side of the first clamping arm (31) and the second clamping arm (32), and a return spring (7) is connected between the two fixing blocks (33). A positioning mechanism (8) is provided on the other side of the first clamping arm (31) and the second clamping arm (32).
3. The spring clip pressure testing fixture according to claim 2, characterized in that, The positioning mechanism (8) includes a first positioning pin (81) and a second positioning pin (82) respectively disposed on the first clamping arm (31) and the second clamping arm (32). A positioning rod (83) is rotatably connected to the first positioning pin (81). A sliding groove (84) is provided at the end of the positioning rod (83) away from the first positioning pin (81). The sliding groove (84) is slidably connected to the second positioning pin (82).
4. The spring clip pressure testing fixture according to claim 3, characterized in that, A handle (831) is provided on the outside of the positioning rod (83).
5. The spring clip pressure testing fixture according to claim 1, characterized in that, The inner sides of the clamping ends of the first clamping arm (31) and the second clamping arm (32) are provided with anti-slip texture.
6. The spring clip pressure testing fixture according to claim 1, characterized in that, The fixed base (2) includes a fixed plate (21) movably mounted on the base (1), and an arched fixed block (22) is installed on the fixed plate (21) by bolts.
7. A spring clip pressure testing fixture according to claim 6, characterized in that, The base (1) is provided with a slide rail (11), and the bolt cap can slide and adjust its position within the slide rail (11). The fixing plate (21) is fixedly installed on the base (1) by the cooperation of the bolt and the slide rail (11).