A reciprocating fatigue testing device

Abstract

The present invention relates to a reciprocating fatigue testing device, comprising a propulsion drive assembly, a propulsion transmission assembly, and a testing unit which are sequentially connected in transmission; the propulsion transmission assembly is connected in transmission to at least one testing unit; the testing unit comprises a propulsion limit assembly, a reset assembly, a workbench, a working arm, and a workpiece fixing member; the workpiece is fixed between the working arm and the workpiece fixing member; the working arm is respectively connected in transmission to the propulsion limit assembly and the reset assembly, so that the working arm generates reciprocating motion. Compared with the prior art, the present invention can realize stepless regulation of reciprocating stroke displacement, and can simulate different temperatures and different medium environments, so as to complete reciprocating fatigue tests of different workpieces under different conditions, and has the advantages of wide application range and high reliability of test results; in addition, the present device can realize the simultaneous execution of multiple groups of tests, improve the compatibility of different workpieces to be tested and the utilization efficiency of motor equipment, and greatly improve the test efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering machinery and relates to a reciprocating fatigue testing device. Background Art

[0002] At present, many reciprocating fatigue test devices use a rotating motor to drive a crank-connecting rod mechanism to act on the product to be tested. The reciprocating stroke acting on the product can only adjust the rotation radius of the curved edge or the length of the connecting rod. The equipment space, adjustment range, and occupied resources are often limited. As a result, a test device can only meet the test requirements within a certain stroke range, and it is impossible to test two products with different test strokes at the same time. Summary of the invention

[0003] The purpose of the present invention is to provide a reciprocating fatigue testing device in order to overcome the defects of the above-mentioned prior art. The present invention can solve the requirements of different test strokes required for different products and test two or more products with different test strokes at the same time through one motor device, thereby improving the compatibility of different products to be tested and improving the application efficiency of the motor equipment.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A reciprocating fatigue testing device, used to implement a reciprocating fatigue test on at least one workpiece, the testing device comprising a propulsion drive assembly, a propulsion transmission assembly, and a testing unit which are sequentially connected in transmission;

[0006] The propulsion transmission assembly is in transmission connection with at least one test unit;

[0007] The test unit comprises a propulsion limit assembly, a reset assembly, a workbench, a working arm and a workpiece fixing member;

[0008] The propulsion limit assembly is in transmission connection with the propulsion transmission assembly;

[0009] The workpiece fixing member is fixed on the workbench;

[0010] The workpiece is fixed between the working arm and the workpiece fixing member;

[0011] The working arm is respectively connected to the advancing limit assembly and the resetting assembly in a transmission manner, so that the working arm generates a reciprocating motion.

[0012] During the test, the workpiece is fixed between the working arm and the workpiece fixing member, wherein the workpiece fixing member is fixedly arranged, and the working arm reciprocates under the action of the propulsion mechanism and the reset assembly, thereby realizing the reciprocating fatigue test of the workpiece. In addition, through multiple test units connected to a single propulsion transmission assembly, reciprocating fatigue tests on multiple workpieces are realized at the same time, thereby improving the test efficiency.

[0013] Furthermore, the propulsion drive assembly includes a motor, a drive disc and a drive connecting rod;

[0014] The motor is sequentially connected to the propulsion transmission assembly through the drive disc and the drive connecting rod.

[0015] The motor is a stepper motor, and the drive disc is fixedly connected to the output shaft of the motor through bolts and positioning pins.

[0016] The motor drives the driving disk to rotate, and converts the rotation of the driving disk into the forward and backward reciprocating motion of the propulsion transmission assembly through the driving connecting rod, and then pushes the working arm through the propulsion limit assembly to complete the pushing behavior of the reciprocating fatigue test process.

[0017] Furthermore, the driving disc is arranged on the output shaft of the motor;

[0018] The driving disc is provided with a plurality of fixing hole assemblies along the circumferential direction;

[0019] The fixing hole assembly includes a plurality of fixing holes radially opened on the driving disk, and one end of the driving connecting rod is connected to the fixing hole pin shaft. Specifically, a through hole is opened at the end of the driving connecting rod, and a pin shaft is arranged between the through hole and the fixing hole. The driving connecting rod is connected to the driving disk pin shaft through the through hole, the fixing hole and the pin shaft.

[0020] The crank connecting rod is replaced by a driving plate and a driving connecting rod, and one end of the driving connecting rod is connected to a fixed hole pin at different radial positions, so as to control the maximum propulsion stroke of the reciprocating fatigue test.

[0021] As a preferred technical solution, multiple fixing holes in each fixing hole assembly are arranged at equal intervals.

[0022] Furthermore, the propulsion transmission assembly includes a transmission slide rail and a driving slide slidably arranged on the transmission slide rail;

[0023] The driving slide is respectively connected in transmission with the propulsion driving assembly and at least one propulsion limiting assembly.

[0024] One end of the driving connecting rod is hinged to the driving slide, and at least one connecting and fixing plate is provided on the driving slide, and is transmission-connected to the propulsion and limiting assembly through the connecting and fixing plate.

[0025] Furthermore, the propulsion limit assembly includes a ball head adjustment connecting rod, a propulsion linear bearing, an adjustment guide rod and an adjustment positioning ring;

[0026] The two ends of the ball head adjustment connecting rod are respectively connected to the propulsion transmission assembly and the propulsion linear bearing for transmission;

[0027] The propelling linear bearing sliding sleeve is arranged on the adjusting guide rod;

[0028] The adjusting positioning ring is fixedly sleeved on the adjusting guide rod;

[0029] One end of the adjusting guide rod is transmission-connected to the working arm;

[0030] A transmission connecting plate is provided between one end of the ball head adjusting connecting rod and the propulsion linear bearing, and both ends of the ball head adjusting connecting rod are respectively hinged to the connecting fixing plate and the transmission connecting plate.

[0031] When the ball head adjustment connecting rod pushes the linear bearing forward, the linear bearing slides along the adjustment guide rod until it contacts the adjustment positioning ring, which is fixed on the adjustment guide rod, so that the adjustment guide rod is pushed forward together with the adjustment positioning ring, thereby displacing the working arm.

[0032] At the same time, by adjusting the position of the adjusting positioning ring on the adjusting guide rod, the maximum propulsion stroke of the reciprocating fatigue test can also be controlled, and the control effect of stepless regulation can be achieved.

[0033] Furthermore, the reset assembly includes a guide rail bracket, a guide rail, a reset linear bearing, a limit ring and a reset cylinder;

[0034] The guide rail bracket is fixed on the workbench;

[0035] The guide rail is fixed on the guide rail bracket;

[0036] The reset linear bearing sliding sleeve is arranged on the guide rail and is transmission-connected with the working arm;

[0037] The limiting ring is fixedly sleeved on the guide rail and is located at the front and rear sides of the reset linear bearing;

[0038] One end of the reset cylinder is fixedly connected to the guide rail bracket, and the other end is transmission-connected to the reset linear bearing.

[0039] The pushing direction of the piston of the reset cylinder is opposite to the pushing direction of the adjusting guide rod. When the adjusting guide rod pushes the working arm forward, the reset cylinder is compressed. When the adjusting guide rod reaches the maximum pushing distance, the linear bearing is pushed backward with the rotation of the driving disk and separated from the adjusting positioning ring. At this time, the reset cylinder loses load and the piston pushes in the opposite direction, causing the working arm and the adjusting guide rod to move backward and reset until the reset linear bearing contacts the limit ring.

[0040] The workpiece realizes reciprocating motion under the action of the driving disc and the reset cylinder, thereby realizing reciprocating fatigue test.

[0041] The maximum reset stroke of the reciprocating fatigue test is controlled by resetting the rear limit ring of the linear bearing, and the maximum propulsion stroke of the reciprocating fatigue test can also be controlled by resetting the front limit ring of the linear bearing.

[0042] Furthermore, the workbench is also provided with a working arm support assembly;

[0043] The working arm support assembly comprises a support frame arranged on the workbench, a support slide rail arranged on the support frame, and a support linear bearing slidably sleeved on the support slide rail;

[0044] The working arm is fixed on the supporting linear bearing;

[0045] A connecting plate is provided between the supporting linear bearing and the resetting linear bearing, and the supporting linear bearing and the resetting linear bearing are connected by transmission through the connecting plate.

[0046] The working arm slides by supporting linear bearings and supporting slide rails, and the stability of the working arm sliding is achieved through the cooperation of the working arm support assembly and the reset assembly, that is, the support frame and the supporting slide rails, guide rail brackets and guide rails on the support frame, thereby avoiding the situation where the working arm rotates while sliding when using a single guide rail.

[0047] A workpiece fixing frame is fixedly arranged on the workbench, and the workpiece fixing piece is fixedly arranged on the workpiece fixing frame.

[0048] Furthermore, a working cavity is provided on the workbench, a drainage hole communicating with the working cavity is provided at the bottom of the workbench, and the workpiece is located in the working cavity.

[0049] The working chamber can be filled with relevant test liquids such as oil, or high-temperature and low-temperature media, so as to achieve different test conditions and make the test closer to the actual working conditions of the product; the drainage hole is used to drain the above liquid medium.

[0050] Working principle: This device is used to realize reciprocating fatigue test on the workpiece. During the test, the workpiece is fixed between the working arm and the workpiece fixing part, wherein the workpiece fixing part is fixedly arranged, and the working arm reciprocates under the pushing action of the propulsion drive assembly, the propulsion transmission assembly and the propulsion limit assembly, and the reset action of the reset assembly in sequence, thereby reciprocating load loading and unloading the workpiece, thereby realizing reciprocating fatigue test on the workpiece;

[0051] Propulsion: The motor works and drives the driving disk to rotate, so that one end of the driving connecting rod hinged to the driving disk rotates accordingly, and the other end drives the driving slide to reciprocate on the transmission slide rail. At this time, the ball head adjustment connecting rod on the driving slide drives the propulsion linear bearing to reciprocate on the adjustment guide rod. When the propulsion linear bearing moves forward to contact the adjustment positioning ring fixed on the adjustment guide rod, the adjustment guide rod can be pushed forward through the adjustment positioning ring, and then the workpiece is pushed forward through the working arm hinged to one end of the adjustment guide rod;

[0052] Reset action: When the working arm moves forward, the piston of the reset cylinder moves forward and compresses the reset cylinder. When the working arm moves to the maximum distance, the linear bearing is separated from the adjustment and positioning ring, the reset cylinder loses its load, and the piston moves backward until the linear bearing contacts the limit ring. At this time, the reset cylinder drives the working arm to reset the workpiece.

[0053] Among them, by adjusting the position of the connection between the driving connecting rod and the driving disk, or adjusting the position of the positioning ring on the adjusting guide rod, the maximum propulsion stroke of the reciprocating fatigue test can be controlled; by adjusting the position of the limit ring on the rear side of the reset linear bearing, the maximum reset stroke of the reciprocating fatigue test can be controlled; thereby realizing stepless control of the test stroke in the reciprocating fatigue test;

[0054] In addition, by connecting the driving slide to multiple test units arranged in parallel, reciprocating fatigue tests can be performed on multiple workpieces simultaneously under different test conditions, which significantly improves the test efficiency.

[0055] Compared with the prior art, the present invention has the following characteristics:

[0056] 1) It has a wide range of applications. By adjusting the position of the connection between the driving connecting rod and the driving disc, the position of the adjusting positioning ring on the adjusting guide rod, and the position of the limit ring, the reciprocating stroke displacement can be adjusted steplessly, so it is suitable for reciprocating fatigue tests of different types and specifications;

[0057] 2) The test results are highly reliable. By adding different types or temperatures of media into the working chamber, the reciprocating fatigue performance of the workpiece under different test conditions can be obtained, making the test results closer to the actual situation;

[0058] 3) High equipment utilization rate. The device can realize the synchronization of multiple groups of tests through multiple groups of subsequent test devices connected to the driving slide transmission, so as to improve the compatibility of different workpieces to be tested and improve the utilization efficiency of motor equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a structural schematic diagram of a reciprocating fatigue testing device in the present invention;

[0060] Figure 2for Figure 1 A partial enlarged view of the middle A;

[0061] Description of the markings in the figure:

[0062] 1-motor, 2-drive disk, 3-drive connecting rod, 4-drive slide, 5-ball head adjustment connecting rod, 6-propelling linear bearing, 7-adjusting guide rod, 8-adjusting positioning ring, 9-workbench, 10-guide rail bracket, 11-reset linear bearing, 12-reset cylinder, 13-limiting ring, 14-working arm, 15-working chamber, 16-drain hole, 17-transmission slide rail, 18-support frame, 19-guide rail, 20-support slide rail, 21-workpiece fixing frame, 22-connecting plate, 23-support linear bearing, 24-fixing hole. DETAILED DESCRIPTION

[0063] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0064] Embodiment 1:

[0065] like Figure 1 A reciprocating fatigue testing device shown in the figure includes a propulsion drive assembly, a propulsion transmission assembly, and a test unit which are sequentially connected in transmission; wherein the test unit includes a propulsion limit assembly, a reset assembly, a workbench 9, a working arm 14, and a workpiece fixing member which are transmission-connected to the propulsion transmission assembly, wherein the workpiece fixing member is fixed on the workbench 9, the workpiece is fixed between the working arm 14 and the workpiece fixing member, and the working arm 14 is respectively transmission-connected to the propulsion mechanism and the reset assembly, so that the working arm generates reciprocating motion.

[0066] The propulsion drive assembly includes a motor 1, a drive disc 2 and a drive connecting rod 3; the motor 1 is connected to the propulsion transmission assembly through the drive disc 2 and the drive connecting rod 3 in turn. In addition, the motor 1 adopts a stepper motor, and the drive disc 2 is fixedly connected to the output shaft of the motor 1 through bolts and positioning pins. A plurality of fixing hole assemblies are provided on the drive disc 2 along the circumferential direction, and the fixing hole assembly includes a plurality of fixing holes 24 that are evenly spaced along the radial direction on the drive disc 2, and a through hole is provided at the end of the drive connecting rod 3, and the through hole is connected to the fixing hole 24 through a pin shaft.

[0067] The propulsion transmission assembly includes a transmission slide rail 17 and a driving slide 4 slidably disposed on the transmission slide rail 17 and transmission-connected to the propulsion limit assembly. The driving slide 4 is also hinged to the driving connecting rod 3 .

[0068] The push-limit assembly includes a ball-end adjustment link 5, an adjustment guide rod 7 with one end connected to the working arm 14, a push linear bearing 6 slidably sleeved on the adjustment guide rod 7, and an adjustment positioning ring 8 fixedly sleeved on the adjustment guide rod 7; wherein, the two ends of the ball-end adjustment link 5 are respectively connected to the driving slide 4 and the push linear bearing 6. The driving slide 4 is provided with a connecting and fixing plate, and one end of the ball-end adjustment link 5 is hinged to the connecting and fixing plate.

[0069] like Figure 2 As shown, the reset assembly includes a guide rail bracket 10 fixedly mounted on the workbench 9, a guide rail 19 fixedly mounted on the guide rail bracket 10, a reset linear bearing 11 slidably mounted on the guide rail 19 and transmission-connected to the working arm 14, two limit rings 13 fixedly mounted on the guide rail 19 and respectively located on the front and rear sides of the reset linear bearing 11, and a reset cylinder 12; wherein, one end of the reset cylinder 12 is fixedly connected to the guide rail bracket 10, and the other end is transmission-connected to the reset linear bearing 11.

[0070] A working arm support assembly is also provided on the workbench 9, and the working arm support assembly includes a support frame 18 arranged on the workbench 9, a support slide rail 20 arranged on the support frame 18, and a support linear bearing 23 slidably sleeved on the support slide rail 20; wherein, the working arm 14 is fixedly arranged on the support linear bearing 23, and a connecting plate 22 is provided between the support linear bearing 23 and the reset linear bearing 11, and is transmission-connected through the connecting plate 22.

[0071] A workpiece fixing frame 18 is fixedly arranged on the workbench 9 , and a workpiece fixing member is fixedly arranged on the workpiece fixing frame 21 .

[0072] The workbench 9 is also provided with a working chamber 15 for filling with oil or other related test liquids or high-temperature and low-temperature media. A drainage hole 16 connected to the working chamber 15 is opened at the bottom of the workbench 9, and the workpiece is located in the working chamber 15.

[0073] Working principle: This device is used to realize reciprocating fatigue test on the workpiece. During the test, the workpiece is fixed between the working arm 14 and the workpiece fixing part, wherein the workpiece fixing part is fixedly arranged, and the working arm 14 reciprocates under the pushing action of the propulsion drive assembly, the propulsion transmission assembly and the propulsion limit assembly, and the reset action of the reset assembly in sequence, thereby realizing the reciprocating fatigue test on the workpiece;

[0074] Propulsion effect: The motor 1 works and drives the driving disk 2 to rotate, so that one end of the driving connecting rod 3 hinged to the driving disk 2 rotates accordingly, and the other end drives the driving slide 4 to reciprocate on the transmission slide rail 17. At this time, the ball head adjustment connecting rod 5 on the driving slide 4 drives the propulsion linear bearing 6 to move on the adjustment guide rod 7. When the propulsion linear bearing 6 moves forward to contact the adjustment positioning ring 8 fixed on the adjustment guide rod 7, the adjustment guide rod 7 can be pushed forward through the adjustment positioning ring 8, and then the workpiece is pushed through the working arm 14 hinged to one end of the adjustment guide rod 7;

[0075] Reset function: When the working arm 14 is pushed forward, the piston of the reset cylinder 12 moves forward and compresses the reset cylinder 12. When the working arm 14 is pushed to the maximum distance, the linear bearing 6 is pushed to separate from the adjustment and positioning ring 8, and the reset cylinder 12 loses its load. The piston moves backward until the reset linear bearing 11 contacts the limit ring 13. At this time, the reset cylinder 12 drives the working arm 14 to reset the workpiece.

[0076] Among them, by adjusting the position of the connection between the driving connecting rod 3 and the driving disk 2, or adjusting the position of the positioning ring 8 on the adjusting guide rod 7, the maximum propulsion stroke of the reciprocating fatigue test can be controlled; by adjusting the position of the limit ring 13 on the rear side of the reset linear bearing 11, the maximum reset stroke of the reciprocating fatigue test can be controlled; thereby realizing stepless control of the test stroke in the reciprocating fatigue test.

[0077] Embodiment 2:

[0078] In this embodiment, three parallel connecting and fixing plates are provided on the driving slide 4, each connecting and fixing plate is transmission-connected to the corresponding test unit, and the three working chambers 15 are respectively filled with oil at 25, 35 and 55°C to perform reciprocating fatigue tests on the workpiece at different temperatures.

[0079] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A reciprocating fatigue testing device, used to implement a reciprocating fatigue test on at least one workpiece, characterized in that: The device comprises a propulsion drive assembly, a propulsion transmission assembly, and a test unit which are sequentially connected in transmission; The propulsion transmission assembly is in transmission connection with at least one test unit; The test unit comprises a propulsion limit assembly, a reset assembly, a workbench (9), a working arm (14), and a workpiece fixing member; The propulsion limit assembly is in transmission connection with the propulsion transmission assembly; The workpiece fixing member is fixed on the workbench (9); The workpiece is fixed between the working arm (14) and the workpiece fixing member; The working arm (14) is respectively connected to the advancing limit assembly and the resetting assembly in a transmission manner, so that the working arm generates a reciprocating motion; The thrust limit assembly comprises a ball head adjustment connecting rod (5), a thrust linear bearing (6), an adjustment guide rod (7) and an adjustment positioning ring (8); The two ends of the ball head adjustment connecting rod (5) are respectively connected to the propulsion transmission assembly and the propulsion linear bearing (6); The propulsion linear bearing (6) is slidably sleeved on the adjustment guide rod (7); The adjusting positioning ring (8) is fixedly sleeved on the adjusting guide rod (7) and is in detachable contact with the propulsion linear bearing (6); One end of the adjusting guide rod (7) is transmission-connected to the working arm (14); The propulsion transmission assembly comprises a transmission slide rail (17) and a driving slide table (4) slidably arranged on the transmission slide rail (17); The driving slide (4) is respectively connected to the propulsion driving assembly and the propulsion limiting assembly in a transmission manner; when the ball head adjustment connecting rod (5) pushes the propulsion linear bearing (6) forward, the propulsion linear bearing (6) slides along the adjustment guide rod (7) until it contacts the adjustment positioning ring (8), and the adjustment positioning ring (8) is sleeved on the adjustment guide rod (7), so that the adjustment guide rod (7) is pushed forward together with the adjustment positioning ring (8), thereby causing the working arm (14) to move.

2. A reciprocating fatigue testing device according to claim 1, characterized in that: The propulsion drive assembly comprises a motor (1), a drive disc (2) and a drive connecting rod (3); The motor (1) is sequentially connected to the propulsion transmission assembly via the drive disc (2) and the drive connecting rod (3).

3. A reciprocating fatigue testing device according to claim 2, characterized in that: The driving disc (2) is provided with a plurality of fixing hole assemblies along the circumferential direction; The fixing hole assembly comprises a plurality of fixing holes (24) radially opened on the driving disk (2), and one end of the driving connecting rod (3) is pin-connected to the fixing hole (24).

4. A reciprocating fatigue testing device according to claim 1, characterized in that: The reset assembly comprises a guide rail bracket (10), a guide rail (19), a reset linear bearing (11), a limit ring (13) and a reset cylinder (12); The guide rail bracket (10) is fixedly mounted on the workbench (9); The guide rail (19) is fixed on the guide rail bracket (10); The reset linear bearing (11) is slidably sleeved on the guide rail (19) and is transmission-connected to the working arm (14); The limiting ring (13) is fixedly sleeved on the guide rail (19) and is located on both sides of the reset linear bearing (11); One end of the reset cylinder (12) is fixedly connected to the guide rail bracket (10), and the other end is drivingly connected to the reset linear bearing (11).

5. A reciprocating fatigue testing device according to claim 4, characterized in that: The workbench (9) is also provided with a working arm support assembly; The working arm support assembly comprises a support frame (18) arranged on the workbench (9), a support slide rail (20) arranged on the support frame (18), and a support linear bearing (23) slidably sleeved on the support slide rail (20); The working arm (14) is fixedly mounted on a supporting linear bearing (23); A connecting plate (22) is provided between the supporting linear bearing (23) and the resetting linear bearing (11), and the supporting linear bearing (23) and the resetting linear bearing (11) are connected in transmission via the connecting plate (22).

6. A reciprocating fatigue testing device according to claim 1, characterized in that: The workbench (9) is further provided with a working chamber (15), and the bottom of the workbench (9) is provided with a drainage hole (16) connected to the working chamber (15), and the workpiece is located in the working chamber (15).

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