A track fatigue performance test tool for a three-channel fatigue testing machine

Abstract

The utility model relates to a track fatigue performance test frock for three -way fatigue testing machine, including vertical actuating device, horizontal actuating device and torsional actuating device, vertical actuating device includes vertical actuating device connecting seat and the contact platform of fixed connection in vertical actuating device connecting seat lower extreme, the horizontal actuating device includes horizontal actuating device connecting seat and two pin shaft connecting seat, horizontal actuating device connecting seat is fixedly connected with two pin shaft connecting seat through the support arm, two pin shaft connecting seat is fixedly connected with the both ends of track pin of track board one end respectively, the torsional actuating device includes two shaft coupling supports, the torsional actuating device connecting seat is hinged on the shaft coupling support, two torsional actuating device connecting seats are fixedly connected with the both ends of track pin of track board other end respectively, the utility model can realize the track board - track pin as assembly condition under the condition of simultaneously exerting longitudinal, transverse, torsional load, more real reflection track board - track pin's fatigue performance.

Description

Technical Field

[0001] This utility model relates to the field of fatigue performance testing technology, specifically to a track fatigue performance testing fixture for a three-channel fatigue testing machine. Background Technology

[0002] Tracked vehicles operate on harsh and variable road conditions. During movement, the tracks bear dynamic stresses from the vehicle's weight, rolling resistance, and combat loads, making them highly susceptible to fatigue failure of the track shoes and track pins, thus compromising mobility and combat effectiveness. Currently, there are limited methods for characterizing the fatigue performance of track shoes and track pins. Typically, standard specimens made from the raw materials used in track shoes and track pins are prepared for characterization testing, with material properties reflecting the fatigue performance of the track shoes and track pins. However, in practice, material properties are difficult to accurately reflect the fatigue performance of track shoes and track pins. The fatigue performance of track shoes and track pins can also be characterized using a three-channel fatigue testing machine, such as... Figure 1 As shown, the main structure of the three-channel fatigue testing machine includes a testing machine base, a vertical actuator, a horizontal actuator, and a torsional actuator. When characterizing the track plates and track pins individually, due to the structural characteristics of the specimen, the track plates cannot be connected to the torsional actuator, and the track pins cannot be connected to the horizontal / vertical actuators simultaneously. When testing the track plate-track pin assembly, the lack of suitable testing fixtures also leads to a significant difference between the load on the specimen and the load under actual working conditions. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a track fatigue performance testing fixture for a three-channel fatigue testing machine. It can simultaneously apply longitudinal, lateral, and torsional loads when the track plate and track pin are used as an assembly, thereby assessing the fatigue performance of the track plate and track pin.

[0004] This utility model is achieved through the following technical solution: a track fatigue performance testing fixture for a three-channel fatigue testing machine is provided, including a vertical actuation device, a horizontal actuation device and a torsional actuation device.

[0005] The vertical actuator includes a vertical actuator connecting seat and a contact platform fixed to the lower end of the vertical actuator connecting seat. The contact platform contacts the upper surface of the track plate, and the vertical actuator connecting seat is fixed to the vertical actuator of the fatigue testing machine.

[0006] The horizontal actuator includes a horizontal actuator connecting seat and two pin connecting seats. The horizontal actuator connecting seat is fixedly connected to the two pin connecting seats through a support arm. The two pin connecting seats are respectively fixedly connected to the two ends of the track pin at one end of the track plate. The horizontal actuator connecting seat is fixedly connected to the horizontal actuator of the fatigue testing machine.

[0007] The torsional actuation device includes two fixed coupling brackets, on which a torsional actuation device connecting seat is axially connected. The two torsional actuation device connecting seats are respectively fixed to both ends of the track pin at the other end of the track plate. One of the torsional actuation device connecting seats is fixed to the torsional actuator of the fatigue testing machine through a coupling.

[0008] In this design, the torsional actuator of the fatigue testing machine drives the torsional actuator connecting seat to rotate via a coupling, thereby causing the track pin to rotate. Another track pin is fixed to the horizontal actuator of the fatigue testing machine via the horizontal actuator, thereby applying a horizontal tension to pull the two track pins in opposite directions. The vertical actuator applies downward pressure to the track plate.

[0009] As an optimization, the pin connecting seat is fixed to the upper end of the column, and a column base is fixed to the lower end of the column. A slider is fixed to the lower end of the column base, and the slider slides on a horizontal guide rail. In this design, the horizontal movement of the pin connecting seat is guided by the guide rail and slider, thereby supporting the sample and achieving horizontal movement while providing support.

[0010] As an optimization, the coupling bracket can be detachably fixed to a fixed support. This allows for position adjustment of the coupling bracket.

[0011] As an optimization, the support has a vertical T-slot, and the coupling bracket is fixed to the support by a T-bolt located in the T-slot. In this solution, the vertical position adjustment of the coupling bracket is achieved through the T-bolt and T-slot.

[0012] As an optimization, the vertical actuator connecting seat has a threaded hole, and the vertical actuator is connected to the threaded hole by a bolt. In this solution, the vertical actuator is connected to the threaded hole by a bolt, thereby improving the convenience of connection.

[0013] As an optimization, the horizontal actuator connecting seat passes through the middle of the support arm and is fixedly connected by a nut. This facilitates the connection between the horizontal actuator connecting seat and the support arm.

[0014] As an optimization, the pin connector is clamped and fixed to the end of the track pin. Since the pin connector applies a tensile force to the end of the track pin, the clamping and fixing facilitates a secure connection between the two.

[0015] The beneficial effects of this utility model are as follows: The track fatigue performance testing fixture of this utility model for a three-channel fatigue testing machine can simultaneously apply longitudinal, transverse, and torsional loads when the track plate-track pin is used as an assembly, which can more accurately simulate the stress of the track plate-track pin under actual working conditions, avoid the problem that the load on the track plate-track pin during fatigue testing is significantly different from the actual working conditions, and can more realistically reflect the fatigue performance of the track plate-track pin. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention;

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 This is a schematic diagram of the vertical actuation device of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the horizontal actuation device of the present invention;

[0020] Figure 5 This is a schematic diagram of the torsional actuation device of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of a three-channel fatigue testing machine;

[0022] As shown in the figure:

[0023] 1. Three-channel fatigue testing machine base; 2. Horizontal actuator; 3. Vertical actuator; 4. Torsional actuator; 5. Vertical actuator connecting seat; 6. Contact table; 7. Column; 8. Support; 9. Coupling; 10. Track pin; 11. Track plate; 12. Torsional actuator connecting seat; 13. Coupling bracket; 14. Slider; 15. Guide rail; 16. Horizontal actuator connecting seat; 17. Support arm; 18. Pin connecting seat; 19. Column base; 20. Nut; 21. T-slot. Detailed Implementation

[0024] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0025] like Figures 1-6As shown, this utility model discloses a track fatigue performance testing fixture for a three-channel fatigue testing machine, comprising a vertical actuation device, a horizontal actuation device, and a torsional actuation device. The vertical actuation device applies downward pressure to the horizontally positioned track plate 11, i.e., applies a longitudinal load. One track pin 10 is connected to the torsional actuation device, achieving positional fixation while applying rotational torque, i.e., applying a torsional load. The other track pin 10 provides horizontal tension through the horizontal actuation device, i.e., applies a lateral load. The structures of the vertical, horizontal, and torsional actuation devices are described in detail below.

[0026] like Figure 3 As shown, the vertical actuator includes a vertical actuator connecting seat 5 and a contact platform 6 fixedly connected to the lower end of the vertical actuator connecting seat 5. The vertical actuator connecting seat 5 is fixedly connected to the vertical actuator 3 of the fatigue testing machine. In this embodiment, the vertical actuator connecting seat 5 has a vertical through threaded hole. After the bolt passes through the vertical actuator 3, it is connected to the threaded hole, thereby connecting the vertical actuator 3 to the threaded hole through the bolt.

[0027] The length of the lower end face of the contact platform 6 is close to the width of the track plate. During the test, the contact platform 6 contacts the upper end face of the track plate, thereby applying downward pressure. The vertical actuator has no other fixing device and can swing freely with the vertical actuator.

[0028] like Figure 4 As shown, the horizontal actuation device includes a horizontal actuation device connecting seat 16 and two pin connecting seats 18. The two pin connecting seats 18 are arranged side by side at the same height. The horizontal actuation device connecting seat 16 is located in the middle of the two pin connecting seats 18. The horizontal actuation device connecting seat 16 is fixed to the two pin connecting seats 18 through a support arm 17. The two ends of the support arm 17 are fixed to the two pin connecting seats 18 by bolts. The horizontal actuation device connecting seat 16 passes through the middle of the support arm 17, and the horizontal actuation device connecting seat 16 is provided with threads. Therefore, the horizontal actuation device connecting seat 16 and the support arm 17 are fixed by nuts.

[0029] Two pin connecting seats 18 are respectively fixed to both ends of the track pin 10 at one end of the track plate 11. Specifically, a connecting hole is opened at the end of the track pin 10, and the pin connecting seat 18 and the track pin 10 are fixedly connected by bolts. The horizontal actuator connecting seat 16 is fixedly connected to the horizontal actuator 2 of the fatigue testing machine; the specific connection method can be bolt connection.

[0030] In order to keep the vertical position of the pin connecting seat 18 constant, in this embodiment the pin connecting seat 18 is fixedly connected to the upper end of the column 7. The column 7 is a vertical cylinder, and the pin connecting seat 18 is a split structure. The two split parts are connected by bolts and clamp the column 7 in the middle to achieve a fixed connection. At the same time, the vertical position of the pin connecting seat 18 can be adjusted after the bolts are loosened.

[0031] A column base 19 is fixedly connected to the lower end of the column 7, and a slider 14 is fixedly connected to the lower end of the column base 19. The slider 14 slides on a horizontal guide rail 15. Thus, the horizontal sliding of the pin connecting seat 18 is achieved by the sliding of the slider 14 on the guide rail 15.

[0032] The pin connecting seat 18 is clamped and fixed to the end of the track pin 10. Specifically, the end of the pin connecting seat 18 is bolted with a clamping part, which clamps the end of the track pin 10 onto the pin connecting seat 18.

[0033] like Figure 5 As shown, the torsional actuation device includes two fixed coupling brackets 13. The coupling brackets 13 are detachably fixed to a fixed support 8, which is fixed to the base of the three-channel fatigue testing machine. Specifically, the coupling brackets 13 are detachably fixed to the support 8 as follows: the support 8 has a vertical T-slot 21, and the coupling brackets 13 are fixed to the support 8 by T-bolts located in the T-slot 21.

[0034] The coupling bracket 13 is axially connected to a torsional actuator connecting seat 12, and the rotating shafts of the two torsional actuator connecting seats 12 are coaxial. The two torsional actuator connecting seats 12 are respectively fixed to both ends of the track pin 10 at the other end of the track plate 11, thus achieving rotational support for both ends of the track pin 10 through the two torsional actuator connecting seats 12. One of the torsional actuator connecting seats 12 is fixedly connected to the torsional actuator 4 of the fatigue testing machine via a coupling 9.

[0035] How to use this utility model:

[0036] This utility model is used for testing the fatigue performance of track plates and track pins coated with rubber on a three-channel fatigue testing machine. The specimen includes a track plate 11 and track pins 10 connected to both ends of the track plate 11. The track pins 10 can rotate on the track plate 11. Vertical, horizontal and torsional loads are applied to the specimen through vertical, horizontal and torsional actuation devices.

[0037] The vertical actuator is directly connected to the vertical actuator by bolts; the horizontal actuator connecting seat 16 of the horizontal actuator has an opening and is fixed to the horizontal actuator; the pin connecting seat 18 of the horizontal actuator is locked to the track pin 10 by bolts; the base of the horizontal actuator is provided with a guide rail 15, which allows the horizontal actuator connecting seat 16 to make horizontal displacement; the support 8 of the torsional actuator has an opening and is fixed to the base of the three-channel fatigue testing machine.

[0038] The torsional actuator connecting seat 12 is fixed to the torsional actuator via the coupling 9, thereby causing the torsional actuator connecting seat 12 to rotate. The torsional actuator connecting seat 12 passes through the coupling bracket 13 and is fixed to another track pin 10 by bolts. Adjust the vertical position of the coupling bracket 13 and the pin connecting seat 18 to keep the specimen horizontal. Adjust the displacement of the vertical actuator to make the vertical actuator contact the center position of the specimen. Figure 1 , Figure 2 As shown.

[0039] When using the test fixture of this embodiment to characterize the fatigue performance of the track plates and track pins coated with rubber, the steps are as follows:

[0040] First, press-fit the track pin 10 and track plate 11 together, keeping the track plate facing upwards. Fix one track pin 10 to the torsional actuator connecting seat, and fix the other track pin 10 to the pin connecting seat 18. Turn on the tensile testing system and switch to manual mode. Adjust the horizontal actuator displacement so that the horizontal actuator connecting seat 16 is close to the pin connecting seat 18 and fix the two with bolts. Adjust the vertical position of the coupling bracket 13 and the pin connecting seat 18 so that the track plate-track pin are horizontal. Adjust the vertical actuator displacement so that the vertical actuator is in contact with the center of the specimen.

[0041] Adjust the force value and displacement zero point, set the upper / lower limits of displacement and torque during the test, set the test stop conditions (time or displacement), and adjust the PID parameters of the three-channel fatigue testing machine using different period signals. Set the test conditions (load, frequency) and add vertical, horizontal, and torsional data acquisition channels. Apply loads to the track shoes and track pins to conduct fatigue tests. The vertical, horizontal, and torsional actuators simultaneously apply loads to the track shoes and track pins to more accurately simulate the stress conditions of the track shoes and track pins under actual working conditions and evaluate the fatigue performance of the track shoes and track pins.

[0042] The tooling of this invention avoids the problem that the load on the track plate-track pin during fatigue testing differs greatly from the actual working conditions, and can more realistically reflect the fatigue performance of the track plate-track pin.

[0043] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A fatigue performance testing fixture for tracks in a three-channel fatigue testing machine, characterized in that: Including vertical actuators, horizontal actuators and torsional actuators; The vertical actuator includes a vertical actuator connecting seat (5) and a contact platform (6) fixed to the lower end of the vertical actuator connecting seat (5). The contact platform contacts the upper surface of the track plate, and the vertical actuator connecting seat (5) is fixed to the vertical actuator (3) of the fatigue testing machine. The horizontal actuator includes a horizontal actuator connecting seat (16) and two pin connecting seats (18). The horizontal actuator connecting seat (16) is fixedly connected to the two pin connecting seats (18) through a support arm (17). The two pin connecting seats (18) are fixedly connected to the two ends of the track pin (10) at one end of the track plate (11). The horizontal actuator connecting seat (16) is fixedly connected to the horizontal actuator (2) of the fatigue testing machine. The torsional actuation device includes two fixed coupling brackets (13), and a torsional actuation device connecting seat (12) is axially connected to the coupling brackets (13). The two torsional actuation device connecting seats (12) are respectively fixed to the two ends of the track pin (10) at the other end of the track plate (11). One of the torsional actuation device connecting seats (12) is fixed to the torsional actuator (4) of the fatigue testing machine through a coupling (9).

2. The track fatigue performance testing fixture for a three-channel fatigue testing machine according to claim 1, characterized in that: The pin connecting seat (18) is fixed to the upper end of the column (7), and the column base (19) is fixed to the lower end of the column (7). The slider (14) is fixed to the lower end of the column base (19), and the slider (14) slides on the horizontal guide rail (15).

3. The track fatigue performance testing fixture for a three-channel fatigue testing machine according to claim 1, characterized in that: The coupling bracket (13) is detachably fixed to the fixed support (8).

4. The track fatigue performance testing fixture for a three-channel fatigue testing machine according to claim 3, characterized in that: The support (8) has a vertical T-slot (21), and the coupling bracket (13) is fixed to the support (8) by a T-bolt located in the T-slot (21).

5. The track fatigue performance testing fixture for a three-channel fatigue testing machine according to claim 1, characterized in that: The vertical actuator connecting seat (5) has a threaded hole, and the vertical actuator (3) is connected to the threaded hole by bolts.

6. The track fatigue performance testing fixture for a three-channel fatigue testing machine according to claim 1, characterized in that: The horizontal actuator connecting seat (16) passes through the middle of the support arm (17) and is fixed by a nut.

7. The track fatigue performance testing fixture for a three-channel fatigue testing machine according to claim 1, characterized in that: The pin connecting seat (18) is clamped and fixed to the end of the track pin (10).

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