Pull test tooling for inner rod ball sleeve thread

Abstract

The utility model relates to tension test tool technical field, concretely relates to a kind of inner pull rod ball sleeve thread tension test tool.The utility model includes the tool body being set in the shape of barrel, tool body includes the cylinder in middle, and end plate I and end plate II located at the both ends of cylinder, the side wall of cylinder is openwork, the assembly of inner pull rod is convenient;End plate I is reserved with the mounting hole I connected with connecting rod;End plate II is reserved with the mounting hole II connected with inner pull rod, wherein:connecting rod is split type structure, including inner screw rod and outer sleeve rod respectively located at the both sides of end plate I;Inner pull rod is integrated structure, including spherical shell end and threaded end.Because inner pull rod is too short, to test the tensile strength of threaded end, increase the tool body with connecting rod to assist tension test;The spherical shell end of inner pull rod is fixed in cylinder, then through test tension testing machine respectively clamped in the both ends of connecting rod and inner pull rod, tension is tested.

Description

Technical Field

[0001] This utility model relates to the technical field of tensile testing fixtures, specifically to a tensile testing fixture for an inner tie rod ball sleeve thread. Background Technology

[0002] Because the inner tie rod ball sleeve thread is short, there is no installation position at the ball end, and it is hollow inside, making it impossible to directly and effectively grip it for tensile testing. Previously, tensile testing was often conducted after the inner tie rod was machined, either by filling or by damaging it. This method not only causes irreversible damage to the inner tie rod, affecting its subsequent use, but also increases testing costs and operational complexity. Furthermore, during testing, it is difficult to accurately simulate the stress conditions of the inner tie rod ball sleeve thread in actual use, leading to inaccurate test results. In addition, existing technologies, such as the Chinese patent authorization announcement number CN223449654U, which discloses a fixture for high-temperature endurance testing, often suffer from interference problems during the assembly of the inner tie rod due to the unreasonable integration of the tooling and the tie rod, affecting assembly efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a tensile testing fixture for the thread of an inner tie rod ball sleeve.

[0004] The technical solution adopted in this utility model is as follows: A tensile testing fixture for an inner tie rod ball sleeve thread includes a cylindrical fixture body. The fixture body includes a central cylinder and end plates I and II located at both ends of the cylinder. The side walls of the cylinder are hollowed out to facilitate the assembly of the inner tie rod. End plate I has a pre-drilled mounting hole I for connecting to a connecting rod; end plate II has a pre-drilled mounting hole II for connecting to the inner tie rod. The connecting rod is a split structure, including an inner threaded rod and an outer threaded rod located on both sides of the end plate I. The inner threaded rod passes through the mounting hole I and is threadedly connected to the outer threaded rod on the outside of the cylinder. The outer threaded rod is connected to the testing tensile testing machine. The inner tie rod is an integral structure, consisting of a spherical end and a threaded end. The spherical end is located inside end plate II, and the threaded end extends to the outside of the cylinder through mounting hole II. The threaded end is connected to the testing tensile testing machine.

[0005] This technical solution fixes the spherical end of the inner tie rod to the cylinder of the tooling body, and connects it to the testing tensile testing machine using a split connecting rod. Simultaneously, the threaded end of the inner tie rod is also connected to the testing tensile testing machine. During testing, the testing tensile testing machine applies tensile force to both the connecting rod and the inner tie rod, thereby simulating the stress condition of the inner tie rod's spherical thread in actual use and accurately testing its tensile strength. Specifically, the split connecting rod is threadedly connected to the outer rod via an internal thread, allowing for flexible length adjustment to adapt to different testing needs, and it can transmit tensile force when connected to the testing tensile testing machine. The spherical end of the integrated inner tie rod is fixed to the inner side of end plate II, and the threaded end extends to the outer side of the cylinder and connects to the tensile testing machine, concentrating the tensile force at the threaded end. The hollowed-out side wall of the cylinder facilitates the assembly of the inner tie rod and reduces interference.

[0006] In addition, the internal tie rod ball sleeve thread tensile test fixture proposed above according to this utility model may also have the following additional technical features: According to one embodiment of the present invention, the hollowed-out shape of the side wall of the cylinder is elongated, the length direction of the elongated hollowed-out is parallel to the axial direction of the cylinder, and the elongated hollowed-out is evenly distributed on the side wall of the cylinder.

[0007] In this technical solution, when installing the inner tie rod, operators can more easily insert it into the cylinder. The elongated, hollowed-out shape avoids obstruction of the cylinder's side walls during installation, improving assembly efficiency. This technical solution also considers cost factors, reducing material usage and lowering production costs.

[0008] According to one embodiment of the present invention, a positioning boss is provided at one end of the internal screw near the inner side of the end plate I. The outer diameter of the positioning boss is larger than the inner diameter of the mounting hole I, which is used to limit the depth of the internal screw passing through the mounting hole I.

[0009] In this technical solution, the connecting rod and the tooling body are separate structures. The advantage is that the positioning boss of the connecting rod can achieve good coaxiality with the inner tie rod, which can ensure that the inner screw can stably and accurately transmit the tension along the axial direction. Compared with the tooling body with the connecting rod, its coaxiality is better, avoiding the deformation of the tooling caused by the torsional force of the rigid connecting rod.

[0010] According to one embodiment of the present invention, the end of the outer sleeve rod connected to the testing tensile testing machine is provided with a connector, the connector being cylindrical in shape, and the surface of the connector being provided with anti-slip texture.

[0011] In this technical solution, the anti-slip texture increases the friction between the connector and the connection part of the tensile testing machine, enabling the two to bond more tightly and effectively resist the effect of tensile force.

[0012] According to one embodiment of the present invention, the surface of the spherical shell end is smooth, and the maximum outer diameter of the spherical shell end is greater than the inner diameter of the mounting hole II, ensuring that the spherical shell end can be stably located inside the end plate II.

[0013] According to one embodiment of the present invention, an elastic washer is provided between the inner tie rod and the mounting hole II. The elastic washer is made of rubber, and its inner diameter is adapted to the diameter of the inner tie rod, while its outer diameter is larger than the inner diameter of the mounting hole II, in order to reduce rigid collisions between the end plate II and the inner tie rod.

[0014] This technical solution reduces rigid collisions between end plate II and the inner tie rod by adding elastic washers, avoiding subsequent paint touch-ups, reducing costs, and improving product competitiveness.

[0015] Compared with the prior art, this utility model has the following advantages: Because the inner tie rod is too short, in order to test the tensile strength of the threaded end, a tooling body with a connecting rod is added to assist in the tensile test; the spherical end of the inner tie rod is fixed in the cylinder, and then the tensile tester clamps the connecting rod and the inner tie rod at both ends respectively to test the tensile force. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention.

[0017] Figure 2 This is a cross-sectional view of the present invention.

[0018] Figure 3 This is a side view of the present invention.

[0019] In the figure: 1. Tooling body; 11. Cylinder; 12. End plate I; 13. End plate II; 2. Connecting rod; 21. Inner threaded rod; 22. Outer threaded rod; 3. Inner tie rod; 31. Spherical end; 32. Threaded end. Detailed Implementation

[0020] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1 like Figures 1 to 3 As shown, this embodiment provides a tensile testing fixture for an inner tie rod ball sleeve thread, including a cylindrical fixture body 1. The fixture body 1 includes a central cylindrical body 11, and end plates I 12 and II 13 located at both ends of the cylindrical body 11. The side walls of the cylindrical body 11 are hollowed out to facilitate the assembly of the inner tie rod 3. The end plate I 12 has a pre-drilled mounting hole I for connecting to the connecting rod 2; the end plate II 13 has a pre-drilled mounting hole II for connecting to the inner tie rod 3, wherein: The connecting rod 2 is a split structure, including an inner threaded rod 21 and an outer threaded rod 22 located on both sides of the end plate I 12. The inner threaded rod 21 passes through the mounting hole I and is threadedly connected to the outer threaded rod 22 on the outside of the cylinder 11. The outer threaded rod 22 is connected to the testing tensile testing machine. The inner tie rod 3 is an integral structure, including a spherical end 31 and a threaded end 32. The spherical end 31 is located inside the end plate II 13, and the threaded end 32 extends to the outside of the cylinder 11 through the mounting hole II. The threaded end 32 is connected to the testing tensile testing machine.

[0022] like Figures 1 to 3 As shown, this technical solution fixes the spherical end 31 of the inner tie rod 3 inside the cylindrical body 11 of the tooling body 1, connects it to the testing tensile testing machine using a split connecting rod 2, and simultaneously connects the threaded end 32 of the inner tie rod 3 to the testing tensile testing machine. During testing, the testing tensile testing machine applies tensile force to the connecting rod 2 and the inner tie rod 3 respectively, thereby simulating the stress condition of the spherical thread of the inner tie rod 3 in actual use and accurately testing its tensile strength. Specifically, the split connecting rod 2 is threadedly connected to the outer rod 22 via an inner thread 21, which can flexibly adjust the length to adapt to different testing requirements, and can transmit tensile force when connected to the testing tensile testing machine. The spherical end 31 of the integrated inner tie rod 3 is fixed inside the end plate II 13, and the threaded end 32 extends to the outside of the cylindrical body 11 and is connected to the tensile testing machine, so that the tensile force is concentrated at the threaded end 32. The hollow side wall of the cylindrical body 11 facilitates the assembly of the inner tie rod 3 and reduces interference.

[0023] In addition, the internal tie rod ball sleeve thread tensile test fixture proposed above according to this utility model may also have the following additional technical features: According to one embodiment of the present invention, the hollowed-out shape of the side wall of the cylinder 11 is elongated, the length direction of the elongated hollowed-out is parallel to the axial direction of the cylinder 11, and the elongated hollowed-out is evenly distributed on the side wall of the cylinder 11.

[0024] In this technical solution, when installing the inner tie rod 3, the operator can more easily insert the inner tie rod 3 into the cylinder 11. The elongated hollow shape avoids obstruction of the installation process by the side wall of the cylinder 11, improving assembly efficiency. This technical solution also takes cost factors into consideration, reducing the amount of materials used and lowering production costs.

[0025] According to one embodiment of the present invention, a positioning boss is provided at one end of the inner screw 21 near the inner side of the end plate I 12. The outer diameter of the positioning boss is larger than the inner diameter of the mounting hole I, which is used to limit the depth of the inner screw 21 passing through the mounting hole I.

[0026] In this technical solution, the connecting rod 2 and the tooling body 1 are separate structures. The advantage is that the positioning boss of the connecting rod 2 can achieve good coaxiality with the inner tie rod 3, which can ensure that the inner screw 21 transmits the tension stably and accurately along the axial direction. Compared with the tooling body 1 with the connecting rod 2, its coaxiality is better, avoiding the deformation of the tooling caused by the torsional force of the rigid connecting rod 2.

[0027] According to one embodiment of the present invention, the end of the outer sleeve rod 22 connected to the testing tensile testing machine is provided with a connector, the connector is cylindrical in shape, and the surface of the connector is provided with anti-slip texture.

[0028] In this technical solution, the anti-slip texture increases the friction between the connector and the connection part of the tensile testing machine, enabling the two to bond more tightly and effectively resist the effect of tensile force.

[0029] According to one embodiment of the present invention, the surface of the spherical shell end 31 is smooth, and the maximum outer diameter of the spherical shell end 31 is greater than the inner diameter of the mounting hole II, ensuring that the spherical shell end 31 can be stably located inside the end plate II 13.

[0030] According to one embodiment of the present invention, an elastic washer is provided between the inner tie rod 3 and the mounting hole II. The elastic washer is made of rubber, and its inner diameter is adapted to the diameter of the inner tie rod 3, while its outer diameter is larger than the inner diameter of the mounting hole II, in order to reduce the rigid collision between the end plate II13 and the inner tie rod 3.

[0031] This technical solution reduces rigid collisions between end plate II13 and inner tie rod 3 by adding elastic washers, thus avoiding subsequent paint touch-ups, reducing costs, and improving product competitiveness.

[0032] The usage process of the above embodiments is as follows: like Figures 1 to 3 As shown, during assembly, the ball end 31 of the inner tie rod 3 is easily inserted into the cylinder 11 using the long strip-shaped cutout on the side wall of the cylinder 11. Because its surface is smooth and its maximum outer diameter is larger than the inner diameter of the mounting hole II, it can be stably positioned inside the end plate II 13. At this time, the elastic washer reduces the rigid collision between the end plate II 13 and the inner tie rod 3. Next, the inner screw 21 of the split connecting rod 2 is passed through the mounting hole I of the end plate I 12. The positioning boss limits its penetration depth to ensure good coaxiality with the inner tie rod 3. Then, it is connected to the cylinder. The outer sleeve rod 22 is threaded and its length can be flexibly adjusted. The outer sleeve rod 22 is connected to the testing tensile testing machine through a cylindrical connector with anti-slip texture. The threaded end 32 of the inner tie rod 3 is also connected to the testing tensile testing machine. During the test, the testing tensile testing machine applies tension to the connecting rod 2 and the inner tie rod 3 respectively to simulate the stress on the ball sleeve thread of the inner tie rod 3 in actual use. The inner screw rod 21 and the outer sleeve rod 22 stably transmit the tension, thereby accurately testing the tensile strength of the ball sleeve thread of the inner tie rod 3.

[0033] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, it is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the present invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.

Claims

1. A pull test tool for a ball pin with an inner pull rod, characterized in that, The fixture body (1) is arranged in a cylindrical shape. The fixture body (1) includes a central cylindrical body (11) and end plates I (12) and II (13) located at both ends of the cylindrical body (11). The side walls of the cylindrical body (11) are hollowed out to facilitate the assembly of the inner tie rod (3). The end plate I (12) has a pre-drilled mounting hole I for connecting to the connecting rod (2). The end plate II (13) has a pre-drilled mounting hole II for connecting to the inner tie rod (3). The connecting rod (2) is a split structure, including an inner screw (21) and an outer sleeve (22) located on both sides of the end plate I (12). The inner screw (21) passes through the mounting hole I and is threadedly connected to the outer sleeve (22) on the outside of the cylinder (11). The outer sleeve (22) is connected to the testing tensile tester. The inner tie rod (3) is an integral structure, including a spherical end (31) and a threaded end (32). The spherical end (31) is located inside the end plate II (13), and the threaded end (32) extends to the outside of the cylinder (11) through the mounting hole II. The threaded end (32) is connected to the testing tensile tester.

2. The inner pull rod ball sleeve thread tension test tool of claim 1, wherein, The hollowed-out shape of the side wall of the cylinder (11) is long strip-shaped. The length direction of the long strip-shaped hollow is parallel to the axis of the cylinder (11), and the long strip-shaped hollow is evenly distributed on the side wall of the cylinder (11).

3. The inner pull rod ball sleeve thread tension test tool of claim 1, wherein, The inner screw (21) is provided with a positioning boss at one end near the inner side of the end plate I (12). The outer diameter of the positioning boss is larger than the inner diameter of the mounting hole I, which is used to limit the depth of the inner screw (21) through the mounting hole I.

4. The inner pull rod ball sleeve thread tension test tool of claim 1, wherein, The outer sleeve rod (22) is connected to the test tensile testing machine at one end with a connector. The connector is cylindrical in shape and has an anti-slip texture on its surface.

5. The inner pull rod ball sleeve thread tension test tool of claim 1, wherein, The surface of the spherical shell end (31) is smooth, and the maximum outer diameter of the spherical shell end (31) is greater than the inner diameter of the mounting hole II, ensuring that the spherical shell end (31) can be stably located inside the end plate II (13).

6. The inner pull rod ball sleeve thread tension test tool of claim 1, wherein, An elastic washer is provided between the inner tie rod (3) and the mounting hole II. The elastic washer is made of rubber. The inner diameter of the elastic washer is matched with the diameter of the inner tie rod (3), and the outer diameter is larger than the inner diameter of the mounting hole II. This is used to reduce the rigid collision between the end plate II (13) and the inner tie rod (3).

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