Fatigue test tool for elastic strip

Abstract

The utility model relates to the technical field of railway accessory detection, and discloses an elastic strip fatigue test tool comprising a pedestal; the top seat and the base are arranged in a spaced mode, the top seat comprises a guiding piece, and a pressurizing hole channel is formed in the guiding piece; one end of the supporting assembly is connected with the base, and the other end of the supporting assembly is connected with the top seat; the pressurizing assembly is arranged in the pressurizing hole channel in a sliding mode, and the pressurizing assembly is suitable for being connected with an elastic strip in an abutting mode; and the mounting assembly is connected with the top seat, the mounting assembly is arranged on the face, close to the base, of the top seat, the mounting assembly is provided with a mounting hole, and the mounting hole is suitable for mounting the elastic strip. According to the utility model, the guiding element is arranged to guide the pressurizing assembly, so that the pressurizing assembly can repeatedly load the same position of the elastic strip, friction vibration and position offset are reduced, and the precision and accuracy of a test result are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of railway fittings detection, in particular to a spring bar fatigue test tool. Background Art

[0002] Rails are components that support locomotives and the direction of locomotives. Rails are fixed to the railroad bed sleepers through spring clip fasteners. The buckling parts of spring clip fasteners are mainly spring clips, which generate buckling pressure on the rails through bending and twisting deformation of the spring clips, ensuring the reliable connection between rails for a long time, ensuring the normal track gauge, and thus ensuring the safety of rail vehicles. Spring clips work under repeated alternating stress, and they are subjected to bending, torsion, fatigue, corrosion and other effects, so fatigue tests are required for spring clips.

[0003] In the prior art, the elastic bar is repeatedly loaded by a testing machine indenter to obtain the fatigue life of the elastic bar. However, during the process of repeated up and down loading, the testing machine indenter cannot ensure that the testing machine indenter loads at the same position of the elastic bar, resulting in low accuracy of the test result. Utility Model Content

[0004] In view of this, the utility model provides a spring bar fatigue test fixture to solve the problem that the test machine pressure head cannot be guaranteed to load at the same position of the spring bar, resulting in low accuracy of the test result.

[0005] The utility model provides a spring bar fatigue test tool, comprising: a base; a top seat, which is spaced apart from the base, the top seat comprising a guide member, the guide member being provided with a pressurizing channel; a support component, one end of the support component being connected to the base, and the other end of the support component being connected to the top seat; a pressurizing component, which can be slidably arranged in the pressurizing channel, and the pressurizing component is suitable for abutting against the spring bar; an installation component, which is connected to the top seat, the installation component is arranged on a side of the top seat close to the base, the installation component being provided with an installation hole, and the installation hole is suitable for installing the spring bar.

[0006] Beneficial effect: By setting the guide piece, the pressurizing component is guided, so that the pressurizing component can repeatedly load the same position of the spring bar, while reducing friction vibration and position deviation, ensuring the precision and accuracy of the test results.

[0007] In an optional embodiment, the support assembly includes a support seat, two of which are respectively arranged at both ends of the top seat, the support seat is connected to the top seat, the support seat is connected to the base, and the support seat, the top seat and the base together form a test channel.

[0008] Beneficial effect: By setting the support seat, while providing support for the top seat, the spring bar in the fatigue test is limited to prevent the spring bar from being displaced during the test, thereby improving the accuracy of the test results.

[0009] In an optional embodiment, the support assembly further includes a side cover, which is detachably connected to the support base, and two side covers are provided, and the two side covers respectively cover the channel openings on both sides of the test channel.

[0010] Beneficial effect: By setting the side covers, the two sides of the test channel are blocked to form a closed test space, which can prevent the fragments of the broken spring bar from splashing during the test and improve the safety of the spring bar fatigue test tooling.

[0011] In an optional embodiment, the side cover is provided with an observation window, and the observation window is arranged in the middle position of the side cover.

[0012] Beneficial effect: By opening an observation window on the side cover, the state of the spring bar during the test can be observed in real time while ensuring safety.

[0013] In an optional embodiment, the mounting assembly includes an abutment seat and a sleeve, the abutment seat is connected to the sleeve, the abutment seat and the sleeve are both connected to the top seat, the abutment seat is suitable for abutting with the elastic bar, and the sleeve is provided with the mounting hole.

[0014] In an optional embodiment, the abutment seat, the sleeve seat and the top seat are integrally formed.

[0015] Beneficial effect: Compared with the split connection setting, the structural strength of the abutment seat, the sleeve seat and the top seat is high.

[0016] In an optional embodiment, the top seat further includes a seat body, the seat body is provided with a first through hole, and the guide member is disposed in the first through hole.

[0017] In an optional embodiment, the pressurizing assembly includes a testing machine pressure head and a pressure block, the testing machine pressure head is suitable for abutting against the pressure block, and the testing machine pressure head and the pressure block can be slidably disposed in the pressurizing channel.

[0018] In an optional embodiment, the abutting surface between the pressing block and the elastic bar is an inclined surface.

[0019] In an optional embodiment, a second through hole is formed on the base, and the elastic bar fatigue test fixture further includes a fastener, and the fastener is suitable for passing through the second through hole and fixing the base on the test platform.

[0020] Beneficial effect: By using fasteners to fix the base to the test platform, it is ensured that the loading device will not slip or deviate during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of the spring clip fatigue test tooling of the embodiment of the utility model (the side cover is not shown);

[0023] Figure 2 This is a schematic diagram of the structure of the top seat and the mounting assembly of an embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the base and the support assembly of an embodiment of the utility model;

[0025] Figure 4 This is a schematic elevation diagram of the installation and loading of the spring bar in an embodiment of the utility model;

[0026] Figure 5 It is a schematic structural diagram of the type III spring bar according to an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 10. Base; 11. Second through hole; 20. Top seat; 21. Guide piece; 211. Pressurized channel; 22. Seat body; 30. Support assembly; 31. Support seat; 32. Side cover; 321. Observation window; 40. Pressurized assembly; 41. Testing machine pressure head; 42. Pressure block; 50. Mounting assembly; 51. Mounting hole; 52. Abutment seat; 53. Sleeve seat; 60. Test channel; 70. Spring bar; 71. Spring bar toe end; 72. Spring bar middle limb; 73. Spring bar heel end. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0030] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0031] According to an embodiment of the utility model, a spring bar fatigue test fixture is provided, comprising: a base 10, a top seat 20, a support assembly 30, a pressurizing assembly 40 and an installation assembly 50. The top seat 20 is spaced apart from the base 10, and the top seat 20 comprises a guide member 21, and the guide member 21 is provided with a pressurizing channel 211; one end of the support assembly 30 is connected to the base 10, and the other end of the support assembly 30 is connected to the top seat 20; the pressurizing assembly 40 is slidably arranged in the pressurizing channel 211, and the pressurizing assembly 40 is suitable for abutting against the spring bar 70; the installation assembly 50 is connected to the top seat 20, and the installation assembly 50 is arranged on a side of the top seat 20 close to the base 10, and the installation assembly 50 is provided with an installation hole 51, and the installation hole 51 is suitable for installing the spring bar 70.

[0032] The spring bar fatigue test fixture of this embodiment is used to guide the pressurizing assembly 40 by setting the guide member 21, so that the pressurizing assembly 40 can repeatedly load the same position of the spring bar 70, while reducing friction vibration and position deviation, thereby ensuring the precision and accuracy of the test results.

[0033] For details, please refer to Figure 5 In this embodiment, the spring bar 70 is a type III spring bar, which includes a spring bar toe end 71, a spring bar middle limb 72 and a spring bar heel end 73.

[0034] Furthermore, the middle limb 72 of the spring bar is installed in the installation hole 51 , and the pressurizing assembly 40 is suitable for abutting against the toe end 71 of the spring bar.

[0035] It should be noted that after the middle limb 72 of the spring bar is installed in the mounting hole 51 , the distance between the middle limb 72 of the spring bar and the hole wall of the mounting hole 51 should be controlled to be between 8 mm and 10 mm.

[0036] It should be noted that when the distance between the middle limb 72 of the elastic bar and the hole wall of the mounting hole 51 is less than 8 mm, the rotation of the elastic bar 70 in the mounting hole 51 is restricted, and the middle limb 72 of the elastic bar may interfere with the hole wall of the mounting hole 51 during the rotation process; when the distance between the middle limb 72 of the elastic bar and the hole wall of the mounting hole 51 is greater than 10 mm, the rotation amplitude of the middle limb 72 of the elastic bar in the mounting hole 51 is too large, affecting the accuracy of the test results.

[0037] Specifically, the guide member 21 is a copper bushing.

[0038] In one embodiment, Figure 1As shown, the support assembly 30 includes a support seat 31. Two support seats 31 are provided. The two support seats 31 are respectively provided at the two ends of the top seat 20. The support seat 31 is connected to the top seat 20. The support seat 31 is connected to the base 10. The support seat 31, the top seat 20 and the base 10 enclose a test channel 60.

[0039] Specifically, the support seat 31 is connected to the base 10 by welding.

[0040] Specifically, the support seat 31 and the top seat 20 are both provided with corresponding threaded holes, and the support seat 31 and the top seat 20 are threadedly connected by screws.

[0041] Of course, in other alternative embodiments, the support seat 31 and the base 10 may also adopt other connection methods, such as detachable connections such as screw connection and snap connection; the support seat 31 and the top seat 20 may also adopt other connection methods, such as welding, snap connection, etc.

[0042] For details, please refer to Figure 1 The support seat 31, the top seat 20 and the base 10 together form a test channel 60 with a square cross-section.

[0043] It is worth noting that by providing the support seat 31, while providing support for the top seat 20, the spring bar 70 in the fatigue test is limited to prevent the spring bar 70 from shifting during the test, thereby improving the accuracy of the test results.

[0044] In one embodiment, Figure 3 As shown, the support assembly 30 further includes a side cover 32 , which is detachably connected to the support base 31 . Two side covers 32 are provided, and the two side covers 32 cover the channel openings on both sides of the test channel 60 respectively.

[0045] Specifically, the side cover 32 and the support seat 31 are provided with corresponding threaded holes, and the side cover 32 and the support seat 31 are threadedly connected by screws.

[0046] Of course, in other alternative embodiments, the side cover 32 and the support base 31 may also adopt other detachable connection methods, such as snap connection, etc.

[0047] It should be noted that after the spring bar 70 is installed in the installation hole 51 , the side cover 32 is connected to the support base 31 .

[0048] It is worth noting that by providing the side cover 32 to block both sides of the test channel 60 to form a closed test space, it is possible to prevent the broken fragments of the spring bar 70 from splashing during the test, thereby improving the safety of the spring bar fatigue test tooling.

[0049] In one embodiment, Figure 3As shown, the side cover 32 is provided with an observation window 321 , and the observation window 321 is disposed in the middle of the side cover 32 .

[0050] Of course, in other alternative implementations, the position of the observation window 321 can also be adjusted according to actual conditions.

[0051] It is worth noting that, by providing the observation window 321 on the side cover 32 , the state of the spring bar 70 during the test can be observed in real time while ensuring safety.

[0052] In one embodiment, Figure 2 As shown, the mounting assembly 50 includes an abutment seat 52 and a sleeve seat 53 , the abutment seat 52 is connected to the sleeve seat 53 , both the abutment seat 52 and the sleeve seat 53 are connected to the top seat 20 , the abutment seat 52 is suitable for abutting with the elastic bar 70 , and a mounting hole 51 is opened on the sleeve seat 53 .

[0053] It should be noted that when performing a fatigue test on the spring bar 70, the pressurizing assembly 40 first pressurizes the toe end 71 of the spring bar downwards, causing the middle limb 72 of the spring bar to rotate around the mounting hole 51. After the rotation, the heel end 73 of the spring bar abuts against the abutment seat 52, limiting the further rotation of the spring bar 70. Thereafter, the pressurizing assembly 40 applies pressure downwards again to perform a fatigue test.

[0054] In one embodiment, the abutment seat 52, the sleeve seat 53 and the top seat 20 are integrally formed.

[0055] Specifically, the abutting seat 52, the sleeve seat 53 and the top seat 20 are integrally formed by machining.

[0056] In other alternative embodiments, the abutment seat 52, the sleeve seat 53 and the top seat 20 may also be separately connected and connected by welding or other connection methods.

[0057] It is worth mentioning that, compared with the separate connection setting, the structural strength of the abutment seat 52, the sleeve seat 53 and the top seat 20 formed in one piece is high.

[0058] In one embodiment, Figure 1 and Figure 2 As shown, the top seat 20 further includes a seat body 22 , the seat body 22 is provided with a first through hole, and the guide member 21 is disposed in the first through hole.

[0059] In one embodiment, Figure 4 As shown, the pressurizing assembly 40 includes a testing machine press head 41 and a press block 42 . The testing machine press head 41 is suitable for abutting against the press block 42 . Both the testing machine press head 41 and the press block 42 can be slidably disposed in the pressurizing channel 211 .

[0060] For details, please refer to Figure 4The testing machine pressure head 41 slides downward and abuts against the pressure block 42, and drives the pressure block 42 to slide downward, so that the pressure block 42 abuts against the toe end 71 of the spring bar.

[0061] In one embodiment, Figure 4 As shown, the contact surface between the pressing block 42 and the elastic bar 70 is an inclined surface.

[0062] Of course, in other alternative embodiments, the abutting surface between the pressing block 42 and the elastic bar 70 may also be in other shapes, such as an arcuate abutting surface that matches the shape of the elastic bar 70 .

[0063] In one embodiment, Figure 1 and Figure 3 As shown, a second through hole 11 is opened on the base 10, and the elastic bar fatigue test tool also includes a fastener, which is suitable for passing through the second through hole 11 and fixing the base 10 on the test platform.

[0064] Specifically, the second through hole 11 is a threaded hole, the fastener is a screw, and the base 10 is threadedly connected to the test platform.

[0065] It should be noted that, through the detachable connection between the base 10 and the test platform, the position of the base 10 on the test platform can be adjusted according to actual conditions.

[0066] It is worth noting that the base 10 is fixed to the test platform by using fasteners to ensure that the loading device will not slip or deflect during the test.

[0067] To install the elastic bar fatigue test fixture of this embodiment, first, weld the support seat 31 to the base 10; then, integrally form the abutment seat 52, the sleeve seat 53 and the top seat 20 through machining; then, connect the support seat 31 to the top seat 20 through screws; finally, connect the side cover 32 to the support seat 31 through screws.

[0068] To apply the elastic bar fatigue test fixture of the present embodiment, first, fix the elastic bar fatigue test fixture on the test platform; then, install the elastic bar middle limb 72 in the installation hole 51; then, connect the side cover 32 and the support seat 31 by screws; finally, slide the testing machine pressure head 41 downward to abut against the pressure block 42, and drive the pressure block 42 to slide downward, so that the pressure block 42 abuts against the elastic bar toe end 71, and use the testing machine pressure head 41 to perform downward cyclic loading to perform a fatigue test on the elastic bar 70 and obtain the test results.

[0069] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A spring clip fatigue test tool, characterized in that: include: Base (10); A top seat (20) is spaced apart from the base (10), the top seat (20) comprises a guide member (21), and the guide member (21) is provided with a pressurizing channel (211); A support assembly (30), one end of the support assembly (30) is connected to the base (10), and the other end of the support assembly (30) is connected to the top seat (20); A pressurizing component (40) is slidably disposed in the pressurizing channel (211), and the pressurizing component (40) is suitable for abutting against the elastic bar (70); The mounting assembly (50) is connected to the top seat (20). The mounting assembly (50) is arranged on a side of the top seat (20) close to the base (10). The mounting assembly (50) is provided with a mounting hole (51). The mounting hole (51) is suitable for mounting the elastic bar (70).

2. The spring clip fatigue test fixture according to claim 1, characterized in that: The support assembly (30) comprises a support seat (31), wherein two support seats (31) are provided, and the two support seats (31) are respectively provided at two ends of the top seat (20), the support seat (31) is connected to the top seat (20), and the support seat (31) is connected to the base (10), and the support seat (31), the top seat (20) and the base (10) enclose a test channel (60).

3. The elastic clip fatigue test fixture according to claim 2, characterized in that: The support assembly (30) further comprises a side cover (32), wherein the side cover (32) is detachably connected to the support seat (31), and two side covers (32) are provided, and the two side covers (32) respectively cover the channel openings on both sides of the test channel (60).

4. The spring clip fatigue test fixture according to claim 3, characterized in that: The side cover (32) is provided with an observation window (321), and the observation window (321) is arranged at a middle position of the side cover (32).

5. The spring clip fatigue test fixture according to any one of claims 1 to 4, characterized in that: The mounting assembly (50) comprises an abutment seat (52) and a sleeve seat (53), wherein the abutment seat (52) is connected to the sleeve seat (53), and both the abutment seat (52) and the sleeve seat (53) are connected to the top seat (20), the abutment seat (52) is suitable for abutting against the elastic bar (70), and the sleeve seat (53) is provided with the mounting hole (51).

6. The spring clip fatigue test fixture according to claim 5, characterized in that: The abutment seat (52), the sleeve seat (53) and the top seat (20) are integrally formed.

7. The elastic clip fatigue test fixture according to any one of claims 1 to 4, characterized in that: The top seat (20) further comprises a seat body (22), the seat body (22) is provided with a first through hole, and the guide member (21) is arranged in the first through hole.

8. The elastic clip fatigue test fixture according to any one of claims 1 to 4, characterized in that: The pressurizing assembly (40) comprises a testing machine pressure head (41) and a pressure block (42); the testing machine pressure head (41) is suitable for abutting against the pressure block (42); and the testing machine pressure head (41) and the pressure block (42) are both slidably arranged in the pressurizing channel (211).

9. The spring clip fatigue test fixture according to claim 8, characterized in that: The contact surface between the pressing block (42) and the elastic bar (70) is an inclined surface.

10. The elastic clip fatigue test fixture according to any one of claims 1 to 4, characterized in that: The base (10) is provided with a second through hole (11), and the elastic bar fatigue test fixture further comprises a fastener, wherein the fastener is suitable for passing through the second through hole (11) and fixing the base (10) on the test platform.

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