Railway fastener vertical shaft torsional rigidity testing mechanism

Abstract

The utility model relates to a railway fastener vertical shaft torsional rigidity testing mechanism, which belongs to the technical field of torsion machines, and comprises a machine body, a controller fixedly arranged on the side wall of the machine body and a test board fixedly arranged on the upper surface of the machine body, a transverse plate, a lifting plate and two chucks are arranged above the machine body, the top chuck is fixedly mounted on the lower surface of the lifting plate, and a hydraulic telescopic rod for adjusting lifting of the lifting plate is mounted on the transverse plate, so that the distance between the two chucks can be adjusted; a torsional rigidity testing mechanism for testing the vertical shaft of the railway fastener is mounted on the upper surface of the testing table and comprises a turntable and a bidirectional lead screw. According to the railway fastener vertical shaft torsional rigidity testing mechanism, the height of the lifting plate is adjusted through the hydraulic telescopic rod, so that the distance between the two chucks is adjusted, the railway fastener vertical shaft torsional rigidity testing mechanism can adapt to testing of vertical shafts of different lengths, the practicability of the torsional rigidity testing mechanism is improved, and the advantages of being high in practicability and good in testing effect are achieved.

Description

Technical Field

[0001] This utility model relates to the field of torsion machine technology, specifically to a testing mechanism for the torsional stiffness of the vertical shaft of railway fasteners. Background Technology

[0002] A torsion testing machine, also known as a torsion tester, is a device primarily used for testing the torsional properties of various materials. With appropriate attachments, it can also be used to perform torsional tests on components and parts, such as steel pipes or the vertical axis torsional resistance testing of railway fasteners. The vertical axis of a railway fastener is the shaft that secures the fastener. Fatigue testing of the vertical axis is a crucial indicator for evaluating fastener performance. It reflects the fastener's ability to restrict the rail's deflection along the vertical axis (Z-axis), directly impacting its ability to effectively maintain a stable connection between the rail and sleeper.

[0003] A search revealed that publication number CN208847602U discloses a torsion testing machine, which includes a frame. A mounting plate is installed at the bottom of the frame, and a torsion hydraulic cylinder is mounted on the mounting plate. The torsion hydraulic cylinder is connected to a turntable and drives its rotation. The turntable is rotatably connected to a circular boss located at the center of the mounting plate via a circular hole at its bottom. The inner surfaces of the four crossbeams at the top of the frame are each provided with a sliding groove. A first sliding rod is installed between the grooves on the front and rear inner surfaces, and a second sliding rod is installed between the grooves on the left and right inner surfaces. The first and second sliding rods are slidably connected to a moving table through sliding rod holes. This torsion testing machine can perform both unidirectional bending and torsion tests on specimens.

[0004] However, the height of the upper and lower turntables in the torsion testing machine of this utility model cannot be adjusted, which makes it impossible to perform torsion tests on shafts of different lengths. Therefore, it cannot meet the usage requirements. Hence, a railway fastener vertical shaft torsional stiffness testing mechanism is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a torsional stiffness testing mechanism for the vertical shaft of railway fasteners. It has the advantages of strong practicality and good testing results, and solves the problem of not being able to perform torsion tests on shafts of different lengths.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a railway fastener vertical shaft torsional stiffness testing mechanism, comprising a body, a controller fixedly installed on the side wall of the body, and a test platform fixedly installed on the upper surface of the body. A horizontal plate, a lifting plate, and two chucks are provided above the body. The top chuck is fixedly installed on the lower surface of the lifting plate. A hydraulic telescopic rod for adjusting the lifting of the lifting plate is installed on the horizontal plate, so that the distance between the two chucks can be adjusted.

[0007] The upper surface of the test bench is equipped with a torsional stiffness testing mechanism for testing the vertical shaft of railway fasteners. The torsional stiffness testing mechanism includes a turntable, a double-acting lead screw, a connector threaded onto the double-acting lead screw and connected to the turntable, and a drive structure located above the test bench for driving the double-acting lead screw in conjunction with the connector to rotate the turntable.

[0008] Furthermore, guide rods are welded to the four corners of the upper surface of the test platform and fixed to the lower surface of the horizontal plate, and all four guide rods penetrate the interior of the lifting plate to achieve stable lifting of the lifting plate.

[0009] Furthermore, a mounting plate is bolted to the upper surface of the test bench, a rotating shaft is fixedly mounted on the lower surface of the turntable and rotatably connected to the upper surface of the mounting plate, the bottom chuck is fixedly mounted on the upper surface of the turntable, and two limiting seats are welded to the upper surface of the mounting plate.

[0010] Furthermore, the connecting component includes a convex slide connected to the outside of the bidirectional lead screw, a connecting rod welded to the outside of the convex slide, a connecting lug fixedly installed to the outside of the connecting rod, a connecting arm hinged to one side of the connecting lug, and a connecting shaft hinged to the other end of the connecting arm and the turntable. The bidirectional lead screw bearing is installed between two limit seats.

[0011] Furthermore, there are two connecting parts, and the two connecting shafts are respectively connected to the opposite edge of the turntable. The turntable can rotate back and forth by means of the threaded engagement of the bidirectional lead screw. The two connecting rods pass through the interior of the two limiting seats respectively.

[0012] Furthermore, the drive structure includes a drive motor fixedly mounted on the upper surface of the mounting plate, a synchronous shaft rotatably mounted inside one of the limiting seats and connected to the end of the bidirectional lead screw, a transmission gear fixedly mounted on the output shaft of the drive motor, and a driven gear fixedly mounted on the other end of the synchronous shaft and meshing with the transmission gear.

[0013] Furthermore, the convex surfaces of the two convex slides are arranged opposite each other, and the length of the connecting rod is greater than the moving distance of the convex slides.

[0014] Furthermore, the lower surface of the body is threaded with four horizontal feet arranged in a rectangular shape, and the lower surface of the horizontal feet is fitted with anti-slip pads.

[0015] Compared with the prior art, this utility model provides a testing mechanism for the torsional stiffness of the vertical axis of railway fasteners, which has the following beneficial effects:

[0016] 1. This railway fastener vertical shaft torsional stiffness testing mechanism uses a hydraulic telescopic rod to adjust the height of the lifting plate, thereby adjusting the distance between the two chucks. It can adapt to the testing of vertical shafts of different lengths, improving the practicality of the torsional stiffness testing mechanism. It achieves the advantages of strong practicality and good testing results, and solves the problem of not being able to perform torsion testing on shafts of different lengths.

[0017] 2. The railway fastener vertical shaft torsional stiffness testing mechanism drives the bidirectional lead screw to rotate through the transmission cooperation of the drive motor, transmission gear and driven gear. Since the bidirectional lead screw threads are opposite, the two convex sliders are relatively separated or relatively displaced, realizing the back and forth rotation of the turntable. It can simulate the complex torsional conditions that the vertical shaft may encounter in actual applications, thereby more comprehensively evaluating its torsional performance. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of part of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the two convex sliding blocks of this utility model.

[0021] In the diagram: 1. Machine body; 2. Controller; 3. Test bench; 4. Guide rod; 5. Horizontal plate; 6. Lifting plate; 7. Chuck; 8. Hydraulic telescopic rod; 9. Horizontal foot; 10. Mounting plate; 11. Turntable; 12. Rotating shaft; 13. Limit seat; 14. Two-way lead screw; 15. Convex slide; 16. Connecting rod; 17. Connecting ear; 18. Connecting arm; 19. Connecting shaft; 20. Drive motor; 21. Synchronous shaft; 22. Transmission gear; 23. Driven gear. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] Please see Figure 1A torsional stiffness testing mechanism for railway fastener vertical shafts includes a body 1, a controller 2 fixedly installed on the side wall of the body 1, and a test platform 3 fixedly installed on the upper surface of the body 1. A horizontal plate 5, a lifting plate 6, and two chucks 7 are provided above the body 1. The top chuck 7 is fixedly installed on the lower surface of the lifting plate 6. A hydraulic telescopic rod 8 for adjusting the lifting of the lifting plate 6 is installed on the horizontal plate 5, so that the distance between the two chucks 7 can be adjusted to easily adapt to the torsional stiffness testing of railway fastener vertical shafts of different lengths.

[0025] The lower surface of the machine body 1 is threaded with four rectangular horizontal feet 9, and anti-slip pads are fitted onto the lower surface of each horizontal foot 9. These horizontal feet 9 ensure stable placement of the machine body 1, while the anti-slip pads further enhance stability. Guide rods 4, fixed to the lower surface of the horizontal plate 5, are welded to the four corners of the upper surface of the test platform 3. All four guide rods 4 penetrate the interior of the lifting plate 6, enabling stable lifting and lowering of the lifting plate 6. It should be noted that the chuck 7 is a three-jaw chuck, capable of fixing the vertical shaft. Three-jaw chucks are a common type of equipment known in the prior art; therefore, their specific structural composition and working principle will not be elaborated upon further in this paper.

[0026] Example 2:

[0027] Please see Figure 2 and Figure 3 Based on Embodiment 1, the upper surface of the test bench 3 is equipped with a torsional stiffness testing mechanism for testing the vertical shaft of railway fasteners. The torsional stiffness testing mechanism includes a turntable 11, a bidirectional lead screw 14, a connector threaded onto the bidirectional lead screw 14 and connected to the turntable 11, and a drive structure located above the test bench 3 for driving the bidirectional lead screw 14 in conjunction with the connector to rotate the turntable 11. A mounting plate 10 is bolted to the upper surface of the test bench 3. A rotating shaft 12 rotatably connected to the upper surface of the mounting plate 10 is fixedly mounted on the lower surface of the turntable 11. A bottom chuck 7 is fixedly mounted on the upper surface of the turntable 11. Two limit seats 13 are welded to the upper surface of the mounting plate 10.

[0028] Specifically, the connecting components include a convex slide 15 threaded to the outside of the double-acting screw 14, a connecting rod 16 welded to the outside of the convex slide 15, a connecting lug 17 fixedly installed on the outside of the connecting rod 16, a connecting arm 18 hinged to one side of the connecting lug 17, and a connecting shaft 19 hinged to the other end of the connecting arm 18 and the turntable 11. The double-acting screw 14 is bearing-mounted between two limit seats 13. There are two connecting components, and the two connecting shafts 19 are respectively connected to the opposite edge of the turntable 11. The threaded engagement of the double-acting screw 14 allows the turntable 11 to rotate back and forth. The two connecting rods 16 pass through the interior of the two limit seats 13, respectively, to limit the movement of the convex slide 15.

[0029] In this embodiment, the drive structure includes a drive motor 20 fixedly mounted on the upper surface of the mounting plate 10, a synchronous shaft 21 rotatably mounted inside one of the limiting seats 13 and connected to the end of the bidirectional lead screw 14, a transmission gear 22 fixedly mounted on the output shaft of the drive motor 20, and a driven gear 23 fixedly mounted on the other end of the synchronous shaft 21 and meshing with the transmission gear 22. The convex surfaces of the two convex slides 15 are arranged opposite each other, and the length of the connecting rod 16 is greater than the moving distance of the convex slides 15.

[0030] By adopting the above technical solution, the bidirectional lead screw 14 is driven to rotate through the transmission cooperation of the drive motor 20, the transmission gear 22 and the driven gear 23. Since the threads of the bidirectional lead screw 14 are opposite, the two convex sliders 15 are relatively separated or relatively displaced, realizing the back-and-forth rotation of the turntable 11. This can simulate the complex torsional conditions that the vertical shaft may encounter in actual applications, thereby more comprehensively evaluating its torsional performance.

[0031] Furthermore, by observing the deformation and failure process of the vertical shaft during its reciprocating rotation, its torsional failure mechanism can be studied in depth. This helps to understand the failure modes of the vertical shaft under torsional loads and provides a theoretical basis for the design, manufacture, and use of vertical shaft tubes.

[0032] The working principle of the above embodiments is as follows:

[0033] In use, the test vertical shaft is first placed into the bottom chuck 7. Then, the height of the lifting plate 6 is adjusted by the hydraulic telescopic rod 8 so that the top of the vertical shaft extends into the top chuck 7. The vertical shaft is fixed by the chuck 7. Then, the bidirectional lead screw 14 is rotated by the transmission cooperation of the drive motor 20, the transmission gear 22 and the driven gear 23. Since the threads of the bidirectional lead screw 14 are opposite, the two convex sliders 15 are relatively separated or relatively displaced, realizing the back and forth rotation of the turntable 11. This can simulate the complex torsional conditions that the vertical shaft may encounter in actual applications, thereby more comprehensively evaluating its torsional performance.

[0034] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A railway fastener vertical shaft torsional stiffness testing mechanism, comprising a body (1), a controller (2) fixedly installed on the side wall of the body (1), and a test platform (3) fixedly installed on the upper surface of the body (1), characterized in that: The machine body (1) is provided with a horizontal plate (5), a lifting plate (6) and a chuck (7) on the top, and there are two chucks (7). The top chuck (7) is fixedly installed on the lower surface of the lifting plate (6). The horizontal plate (5) is equipped with a hydraulic telescopic rod (8) for adjusting the lifting of the lifting plate (6), so that the distance between the two chucks (7) can be adjusted. The upper surface of the test bench (3) is equipped with a torsional stiffness testing mechanism for testing the vertical shaft of railway fasteners. The torsional stiffness testing mechanism includes a turntable (11), a double-acting screw (14), a connector threaded onto the double-acting screw (14) and connected to the turntable (11), and a drive structure located above the test bench (3) for driving the double-acting screw (14) to rotate the turntable (11) in conjunction with the connector.

2. The railway fastener vertical shaft torsional stiffness testing mechanism according to claim 1, characterized in that: The test platform (3) has guide rods (4) welded to the four corners of its upper surface and fixed to the lower surface of the horizontal plate (5). All four guide rods (4) penetrate the interior of the lifting plate (6) to achieve stable lifting of the lifting plate (6).

3. The railway fastener vertical shaft torsional stiffness testing mechanism according to claim 1, characterized in that: The upper surface of the test bench (3) is bolted with a mounting plate (10), the lower surface of the turntable (11) is fixedly mounted with a rotating shaft (12) that is rotatably connected to the upper surface of the mounting plate (10), the bottom chuck (7) is fixedly mounted on the upper surface of the turntable (11), and two limit seats (13) are welded to the upper surface of the mounting plate (10).

4. The railway fastener vertical shaft torsional stiffness testing mechanism according to claim 3, characterized in that: The connecting component includes a convex slide (15) threaded to the outside of the bidirectional lead screw (14), a connecting rod (16) welded to the outside of the convex slide (15), a connecting lug (17) fixedly installed on the outside of the connecting rod (16), a connecting arm (18) hinged to one side of the connecting lug (17), and a connecting shaft (19) hinged to the other end of the connecting arm (18) and the turntable (11). The bidirectional lead screw (14) bearing is installed between two limit seats (13).

5. The railway fastener vertical shaft torsional stiffness testing mechanism according to claim 4, characterized in that: The number of the connectors is two, and the two connecting shafts (19) are respectively connected to the opposite edge of the turntable (11). The turntable (11) can rotate back and forth by means of the threaded engagement of the two-way lead screw (14). The two connecting rods (16) pass through the interior of the two limit seats (13).

6. The railway fastener vertical shaft torsional stiffness testing mechanism according to claim 3, characterized in that: The drive structure includes a drive motor (20) fixedly mounted on the upper surface of the mounting plate (10), a synchronous shaft (21) rotatably mounted inside one of the limiting seats (13) and connected to the end of the bidirectional lead screw (14), a transmission gear (22) fixedly mounted on the output shaft of the drive motor (20), and a driven gear (23) fixedly mounted on the other end of the synchronous shaft (21) and meshing with the transmission gear (22).

7. The railway fastener vertical shaft torsional stiffness testing mechanism according to claim 5, characterized in that: The convex surfaces of the two convex slides (15) are arranged opposite each other, and the length of the connecting rod (16) is greater than the moving distance of the convex slides (15).

8. The railway fastener vertical shaft torsional stiffness testing mechanism according to claim 1, characterized in that: The lower surface of the body (1) is threaded with four horizontal feet (9) arranged in a rectangular shape, and the lower surface of the horizontal feet (9) is fitted with anti-slip pads.

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