Threaded spike anti-pulling clamp

Abstract

The utility model belongs to the technical field of anti-pulling clamps for threaded spikes, and particularly relates to an anti-pulling clamp for threaded spikes, which is used for testing the fastening degree between the threaded spikes and a sleeper and comprises an upper joint and a lower joint which can be mounted in a joint of an anti-pulling experimental device, the upper connector is connected with an upper pull head used for placing the top of the screw spike, a universal joint is arranged between the upper connector and the upper pull head, a sleeper sample is placed in the lower pull frame, the top of the screw spike is clamped in the upper pull head, and the angle of the upper pull head can be freely adjusted within a certain range through the universal joint on the upper pull head. Therefore, the screw spikes with different specifications and installation angles can be adapted, the testing flexibility is improved, and accurate and consistent results can be ensured to be obtained under different testing conditions.

Description

Technical Field

[0001] This utility model belongs to the technical field of threaded rail spike pull-out clamps, specifically relating to a threaded rail spike pull-out clamp. Background Technology

[0002] With the continuous improvement of national railway technology, increasingly higher requirements are being placed on the performance of railway sleepers. To study the impact of pull-out force on threaded spikes on sleepers, the actual stress-strain curves of the sleeper material were obtained through axial tensile test data. The study revealed that the pull-out force of the threaded spikes affects the entire width of the sleeper. The stress is highest at the bottom of the bolt and the contact area between the bolt and the threaded end, making these areas most prone to plastic deformation. Increasing the pull-out force will create a plastic zone at the threaded end, ultimately leading to failure. Therefore, it is essential to conduct corresponding pull-out tests for threaded spikes to meet different usage requirements. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a threaded rail spike pull-out clamp. The sleeper rail sample is placed in the lower pull frame, and the top of the spiral rail spike is inserted into the upper pull head. Through the universal joint on the upper pull head, the upper pull head can be freely adjusted within a certain range to adapt to threaded rail spikes of different specifications and installation angles, thereby improving the flexibility of testing.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a threaded rail spike pull-out clamp for testing the tightness between the threaded rail spike and the sleeper rail, including an upper joint and a lower joint that can be installed in the pull-out test device connector, a pull-down frame for placing the sleeper rail sample is connected to the lower joint, an upper pull head for placing the top of the threaded rail spike is connected to the upper joint, and a universal joint is provided between the upper joint and the upper pull head.

[0005] Preferably, the pull head has a cube-shaped first placement groove, and a first clearance groove is provided on one side of the bottom center of the pull head, through which the top of the threaded spike is inserted into the first placement groove.

[0006] Preferably, the drop-down frame has a cube-shaped second placement slot, and a second clearance slot is provided on one side of the top center of the drop-down frame, through which the threaded spike sample is placed into the second placement slot.

[0007] Preferably, the bottom of the universal joint is connected to a connecting sleeve, the side of the connecting sleeve is provided with a through hole, the top of the upper connector is provided with a fixing rod that matches the connecting sleeve, the fixing rod is provided with a fixing hole, and the fixing rod is connected to the connecting sleeve by inserting a fixing pin into the through hole and the fixing hole.

[0008] Preferably, the pull-down frame includes a fixing plate disposed on the top of the lower connector, connecting plates are fixedly installed on both sides of the top of the fixing plate by bolts, a pull plate is fixedly installed on the top of the connecting plate by bolts, and a second clearance groove is disposed on the pull plate.

[0009] Preferably, the lower connector includes a lower connecting rod, and a connecting plate is provided on the top of the lower connecting rod. The connecting plate is fixedly mounted on the fixing plate by bolts.

[0010] Preferably, both the upper and lower connectors are provided with connection holes for connecting the connectors of the pull-out test device.

[0011] Preferably, a locking nut is fitted onto the lower connecting rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The threaded rail spike pull-out clamp proposed by this utility model allows the sample to be placed in the lower pull frame, and the top of the spiral rail spike to be inserted into the upper pull head. Through the universal joint on the upper pull head, the upper pull head can be freely adjusted within a certain range to adapt to threaded rail spikes of different specifications and installation angles. This not only improves the flexibility of testing, but also ensures that accurate and consistent results can be obtained under different testing conditions.

[0013] 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

[0014] Figure 1 A three-dimensional structural diagram of a threaded rail spike pull-out clamp. Figure 1 .

[0015] Figure 2 A three-dimensional structural diagram of a threaded rail spike pull-out clamp. Figure 2 .

[0016] Figure 3 This is a front view of a threaded rail spike pull-out clamp.

[0017] Figure 4 This is a cross-sectional view of a threaded rail spike pull-out clamp.

[0018] Figure 5 This is a schematic diagram of the three-dimensional structure of the upper pull-out head of a threaded rail spike anti-pull-out clamp.

[0019] Figure 6 This is an exploded three-dimensional view of the upper pull-out head of a threaded rail spike anti-pull-out clamp.

[0020] Figure 7 This is a three-dimensional structural diagram of a pull-down frame for a threaded rail spike pull-out clamp.

[0021] In the diagram: 1. Upper connector; 2. Lower connector; 21. Lower connecting rod; 22. Connecting plate; 3. Pull-down frame; 31. Second placement slot; 32. Second clearance slot; 33. Fixing plate; 34. Connecting plate; 35. Pull plate; 4. Upper pull head; 41. First placement slot; 42. First clearance slot; 43. Fixing rod; 44. Fixing hole; 5. Connecting hole; 6. Universal joint; 61. Connecting sleeve; 62. Through hole; 7. Fixing pin; 8. Locking nut; 9. Sleeper rail; 10. Threaded spike. 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 4 As shown, a threaded rail spike pull-out clamp is used to test the tightness between the threaded rail spike 10 and the sleeper rail 9. It includes an upper connector 1 and a lower connector 2 that can be installed in the pull-out test device connector. The lower connector 2 is connected to a pull-down frame 3 for placing the sleeper rail 9 sample. The upper connector 1 is connected to an upper pull head 4 for placing the top of the threaded rail spike 10. A universal joint 6 is provided between the upper connector 1 and the upper pull head 4.

[0024] This utility model proposes a threaded rail spike pull-out clamp, specifically designed for testing the tightness between the threaded rail spike 10 and the sleeper rail 9, to ensure the robustness and reliability of the threaded rail spike 10 in various applications. The clamp has a compact structure and comprehensive functions, mainly including an upper connector 1 and a lower connector 2 that can be securely installed in the pull-out test device joint. It not only ensures the accuracy of the test but also provides a seamless connection with the test device.

[0025] A pull-down box 3 is connected to the lower connector 2. This pull-down box 3 is specially designed to accurately and securely insert the sample portion of the sleeper rail 9. The construction and material selection of the pull-down box 3 are designed to minimize any slippage or displacement that may occur during the test, thereby ensuring the accuracy of the test results.

[0026] Corresponding to the lower connector 2 is the upper connector 1, which is connected to an upper pull head 4 for placing the top of the threaded spike 10. The upper pull head 4 is also designed with stability and ease of use in mind, ensuring that tension can be applied evenly and stably during testing. To further enhance the flexibility and adaptability of the fixture, a universal joint 6 is specially provided between the upper connector 1 and the upper pull head 4. The introduction of the universal joint 6 allows the upper pull head 4 to be freely adjusted within a certain range to accommodate threaded spikes 10 of different specifications and installation angles. This not only improves the flexibility of testing but also ensures accurate and consistent results under different testing conditions.

[0027] This threaded spike pullout clamp is an efficient, reliable, and flexible testing tool that can accurately assess the tightness between the threaded spike 10 and the sleeper rail 9, providing strong support for various engineering applications.

[0028] Combination Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the pull-up head 4 has a cube-shaped first placement groove 41, and a first clearance groove 42 is provided on one side of the bottom center of the pull-up head 4. The top of the threaded spike 10 is inserted into the first placement groove 41 through the first clearance groove 42.

[0029] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the drop-down box 3 has a cube-shaped second placement groove 31, and a second clearance groove 32 is provided on one side of the top center of the drop-down box 3. The sample of the threaded spike 10 is placed into the second placement groove 31 through the second clearance groove 32.

[0030] Specifically, the pull-up head 4 fully considers the stable placement and convenient operation of the threaded spike 10. The core feature of the pull-up head 4 is a cube-shaped first placement groove 41, which ensures that the threaded spike 10 can be stably and firmly positioned there during the pull-out test, avoiding test errors caused by shaking or misalignment.

[0031] To further optimize the installation process of the threaded track spike 10, a first clearance groove 42 is provided on one side of the bottom center of the pull-up head 4. This first clearance groove 42 not only provides a convenient channel for the top of the threaded track spike 10, allowing it to easily pass through and engage with the first placement groove 41, but also ensures that no unnecessary damage is caused to the threaded track spike 10 during installation. The width and depth of the first clearance groove 42 have been precisely calculated to ensure both smooth installation and the stability of the threaded track spike 10 after installation.

[0032] Corresponding to the upper pull-up head 4, the lower pull-down frame 3 also ensures the stable placement of the sleeper rail 9 sample. The core of the lower pull-down frame 3 is a cube-shaped second placement slot 31, which ensures the stability and accuracy of the sleeper rail 9 sample during the test.

[0033] To facilitate the installation of the sleeper rail 9 sample, a second clearance groove 32 is also provided on one side of the top center of the pull-down frame 3. Through the second clearance groove 32, the sleeper rail 9 sample can be easily placed inside the second placement slot 31 without worrying about any damage during installation. The width and depth of the second clearance groove 32 have also been precisely calculated to ensure smooth and stable installation.

[0034] The ingenious design of the first placement groove 41, the first clearance groove 42, the second placement groove 31, and the second clearance groove 32 not only ensures the stability and accuracy of the threaded spikes 10 and the sleeper rails 9 during the testing process, but also greatly simplifies the installation process and improves testing efficiency.

[0035] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the bottom of the universal joint 6 is connected to a connecting sleeve 61, and a through hole 62 is provided on the side of the connecting sleeve 61. The top of the upper connector 1 is provided with a fixing rod 43 that matches the connecting sleeve 61. The fixing rod 43 is provided with a fixing hole 44. The fixing rod 43 is connected to the connecting sleeve 61 by inserting a fixing pin 7 into the through hole 62 and the fixing hole 44.

[0036] Specifically, the universal joint 6 not only affects the flexibility and adaptability of the fixture, but also directly impacts the accuracy and stability of the test. To further enhance the connection strength and stability between the universal joint 6 and the upper connector 1 and the upper pull head 4, a connecting sleeve 61 is connected to the bottom of the universal joint 6.

[0037] A through hole 62 is provided on the side of the connecting sleeve 61, which not only provides the necessary channel for subsequent fixed connection, but also ensures the convenience and reliability of the connection process. The position and size of the through hole 62 have been precisely calculated and tested to ensure that the fixing pin 7 can be accurately aligned and inserted during the connection process.

[0038] Meanwhile, a fixing rod 43 that perfectly matches the connecting sleeve 61 is provided on the top of the upper connector 1. The design of this fixing rod 43 fully considers the stability of the connection and the convenience of operation. Its shape and size are closely matched with the connecting sleeve 61, ensuring stability and accuracy during the connection process. A fixing hole 44 is provided on the fixing rod 43, providing the necessary space for the insertion of the fixing pin 7, thereby realizing a firm connection between the universal joint 6 and the upper connector 1.

[0039] During the connection process, the retaining pin 7 not only ensures a secure connection between the universal joint 6 and the upper connector 1, but also withstands enormous tensile forces during testing without loosening or falling off. The material and dimensions of the retaining pin 7 have undergone rigorous selection and testing to ensure that it meets various requirements during the testing process.

[0040] During connection, first align the connecting sleeve 61 with the fixing rod 43, then insert the fixing pin 7 through the through hole 62 and the fixing hole 44. The insertion of the fixing pin 7 not only achieves a physical connection between the universal joint 6 and the upper connector 1, but also ensures the stability and reliability of the connection through its strong locking force. It is not only simple and quick, but also very secure, ensuring that no loosening or detachment will occur during testing.

[0041] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the pull-down frame 3 includes a fixing plate 33 set on the top of the lower connector 2. Connecting plates 34 are fixedly installed on both sides of the top of the fixing plate 33 by bolts. A pull plate 35 is fixedly installed on the top of the connecting plate 34 by bolts. The second clearance groove 32 is set on the pull plate 35.

[0042] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the lower connector 2 includes a lower connecting rod 21, and a connecting plate 22 is provided on the top of the lower connecting rod 21. The connecting plate 22 is fixedly installed on the fixing plate 33 by bolts.

[0043] Specifically, the pull-down frame 3 is crucial not only for the stable placement of the sleeper rail 9 sample but also directly affects the safety and accuracy of the testing process. The main body of the pull-down frame 3 includes a fixing plate 33 positioned at the top of the lower connector 2. This fixing plate 33 plays a critical role, providing stable support for the connecting plate 34 and securing it to the lower connector 2 via bolts. The material and thickness of the fixing plate 33 have been rigorously selected and calculated to ensure it can withstand the enormous tensile forces during the test without deformation or damage.

[0044] Two connecting plates 34 are bolted to both sides of the top of the fixed plate 33. The design of these connecting plates 34 balances stability and convenience. They not only provide reliable support for the pull plate 35 but also securely connect to it via bolts. The material and dimensions of the connecting plates 34 have been precisely calculated and tested to ensure they meet various requirements during testing.

[0045] A pull plate 35 is also bolted to the top of the connecting plate 34. This pull plate 35 is one of the most critical parts of the pull-down frame 3, not only providing the necessary space for the second clearance slot 32, but also ensuring stability and safety during the test through its robust structure. The pull plate 35 is made of high-strength alloy material to ensure that it can withstand the huge tensile forces during the test without breaking or deforming.

[0046] The lower connector 2 includes a lower connecting rod 21, which plays a crucial role in connection and support. A connecting plate 22 is located at the top of the lower connecting rod 21, and this connecting plate 22 is bolted to the fixing plate 33. The connecting plate 22 not only ensures the connection between the pull-down frame 3 and the lower connector 2, but also ensures stability and safety during testing through its robust structure.

[0047] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, both the upper connector 1 and the lower connector 2 are provided with connection holes 5 for connecting the connectors of the pull-out test device.

[0048] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, a locking nut 8 is fitted onto the lower connecting rod 21.

[0049] Specifically, in the design of the threaded spike pull-out clamp, the connection method and stability of the joint components are crucial. To ensure that the upper joint 1 and the lower joint 2 can be accurately connected to the joint of the pull-out test device, test device joint connection holes 5 are provided on both the upper joint 1 and the lower joint 2 for connection.

[0050] These connection holes 5 ensure that the upper connector 1 and lower connector 2 can perfectly match the connectors of the pull-out test apparatus. This not only improves the stability of the connection but also greatly simplifies the connection process, allowing testers to easily install the fixtures onto the test apparatus and begin testing.

[0051] To ensure the stability and safety of the lower connector 2 during testing, a locking nut 8 is fitted onto the lower connecting rod 21. This locking nut 8 can not only be tightened or loosened by rotation, but also ensures that the lower connector 2 will not loosen or fall off due to tension during testing.

[0052] In actual testing, the testers first connect the upper connector 1 and the lower connector 2 to the connectors of the pull-out test device through the connecting holes 5. Then, they adjust the tightness of the locking nut 8 as needed to ensure the stability and safety of the lower connector 2 during the test. This not only improves the accuracy and reliability of the test but also significantly reduces potential safety risks during the test.

[0053] 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 threaded rail spike pull-out clamp for testing the tightness between a threaded rail spike (10) and a sleeper rail (9), comprising an upper connector (1) and a lower connector (2) that can be installed in a pull-out test device connector, characterized in that, The lower connector (2) is connected to a pull-down frame (3) for placing the sleeper rail (9) sample, and the upper connector (1) is connected to an upper pull head (4) for placing the top of the threaded spike (10). A universal joint (6) is provided between the upper connector (1) and the upper pull head (4).

2. The threaded rail spike pull-out clamp according to claim 1, characterized in that, The pull head (4) has a cube-shaped first placement groove (41), and a first clearance groove (42) is provided on one side of the bottom center of the pull head (4). The top of the threaded spike (10) is inserted into the first placement groove (41) through the first clearance groove (42).

3. The threaded rail spike pull-out clamp according to claim 1, characterized in that, The drop-down frame (3) has a cube-shaped second placement slot (31). A second clearance slot (32) is provided on one side of the top center of the drop-down frame (3). The sample of the threaded spike (10) is placed into the second placement slot (31) through the second clearance slot (32).

4. A threaded rail spike pull-out clamp according to claim 2, characterized in that, The bottom of the universal joint (6) is connected to a connecting sleeve (61). A through hole (62) is provided on the side of the connecting sleeve (61). A fixing rod (43) matching the connecting sleeve (61) is provided on the top of the pull head (4). A fixing hole (44) is provided on the fixing rod (43). The fixing rod (43) is connected to the connecting sleeve (61) by inserting a fixing pin (7) into the through hole (62) and the fixing hole (44).

5. A threaded rail spike pull-out clamp according to claim 3, characterized in that, The pull-down frame (3) includes a fixing plate (33) set on the top of the lower connector (2), a connecting plate (34) is fixedly installed on both sides of the top of the fixing plate (33) by bolts, a pull plate (35) is fixedly installed on the top of the connecting plate (34) by bolts, and a second clearance groove (32) is set on the pull plate (35).

6. A threaded rail spike pull-out clamp according to claim 5, characterized in that, The lower connector (2) includes a lower connecting rod (21), and a connecting plate (22) is provided on the top of the lower connecting rod (21). The connecting plate (22) is fixedly installed on the fixing plate (33) by bolts.

7. A threaded rail spike pull-out clamp according to any one of claims 1-6, characterized in that, Both the upper connector (1) and the lower connector (2) are provided with connection holes (5) for connecting the connectors of the pull-out test device.

8. A threaded rail spike pull-out clamp according to claim 7, characterized in that, A locking nut (8) is fitted on the lower connecting rod (21).

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