Rock drill connecting rod endurance fatigue testing device

Abstract

The rock drill connecting rod endurance fatigue test device discloses a rock drill connecting rod endurance fatigue test device and relates to the technical field of test devices, which comprises a bottom plate, a T-shaped table is fixedly connected to the top surface of the bottom plate, a sliding rail is fixedly connected to the top surface of the T-shaped table, a sliding block is slidingly connected to the surface of the sliding rail, a support is fixedly connected to the top surface of the sliding block, a first shaft pin is fixedly connected to the top surface of the support, and an intelligent sensor is arranged on the bottom surface of the support. The application has a reasonable structure, the two ends of the connecting rod are respectively sleeved on the first shaft pin and the second shaft pin, the use condition of the connecting rod is simulated by moving the second shaft pin back and forth to perform fatigue test, then the sliding sleeve is moved by the rotation of the shaft rod, and the test strength of the connecting rod is increased by adjusting the elasticity of the spring.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a testing device for the durability and fatigue of a rock drill connecting rod. Background Technology

[0002] The rock drill connecting rod durability fatigue testing device can understand the fatigue life and failure mode of the connecting rod under different load conditions by conducting durability fatigue tests. This helps designers optimize the structure and materials of the connecting rod, improve its reliability and durability. Fatigue testing is an important part of the rock drill production process, and it can strictly inspect the quality of the connecting rod. Only connecting rods that pass the fatigue test can be put into use, thereby ensuring the overall quality and safety of the rock drill.

[0003] Patent CN119533910A discloses a durability fatigue testing device and method for rock drill connecting rods, including a rock drill assembly. The rock drill assembly includes a first rock drill connecting rod, a second rock drill connecting rod hinged to one side of the first rock drill connecting rod, and a rock drill base hinged to one side of the second rock drill connecting rod. This invention utilizes the deflection of an arc-shaped abutment block to compress a second pressure sensing block on its lower surface. Operators can use a computer to fully understand the deformation positions of the first and second connecting rod connection holes. The other end of the bidirectional detection rod deflects upwards, creating a height difference between its height from the distance detection component and its height from the distance detection component when in its normal state. The distance detection component obtains the change data via infrared light, thereby understanding the data changes in the connecting rod connection position and accurately obtaining the deformation data of the connecting rod under the action of two axial forces, improving data accuracy.

[0004] There were still some issues with the connecting rod during testing.

[0005] Existing tests for the fatigue performance of rock drill connecting rods mostly involve clamping the two ends of the connecting rod and then testing it by pulling it back and forth. In actual working conditions, the connecting rod is subjected to impact loads, radial eccentric loads, and alternating torsional shear stresses. Existing tests only simulate single tensile and compressive forces, and the stress patterns deviate significantly from the actual service conditions of the machine, resulting in insufficient reference value for the test data. Summary of the Invention

[0006] The purpose of this application is to provide a durability fatigue testing device for a rock drill connecting rod. The device allows the two ends of the connecting rod to be respectively fitted onto a first axle pin and a second axle pin. The fatigue test is conducted by simulating the actual use of the connecting rod through the back-and-forth movement of the second axle pin. Then, the sliding sleeve is moved by rotating the shaft, and the elastic force of the spring is adjusted to increase the test strength of the connecting rod.

[0007] To achieve the above objectives, this application provides the following technical solution: a durability and fatigue testing device for a rock drill connecting rod, comprising a base plate, a T-shaped platform fixedly connected to the top surface of the base plate, a slide rail fixedly connected to the top surface of the T-shaped platform, a slider slidably connected to the surface of the slide rail, a bracket fixedly connected to the top surface of the slider, a first shaft pin fixedly connected to the top surface of the bracket, and an intelligent sensor installed on the bottom surface of the bracket; It also includes a driven component, a sliding component, and a test component. The driven component is disposed inside the T-shaped platform for use with the slider. The sliding component is disposed on the top surface of the T-shaped platform for moving the second pivot pin. The test component is disposed inside the T-shaped platform for testing the connecting rod.

[0008] Preferably, a column is fixedly connected to the top surface of the bracket, and a baffle is rotatably connected to the top of the column, with one end of the baffle located on one side of the first shaft pin.

[0009] Preferably, the driven component includes through slots formed on the front and rear sides of the T-shaped platform, a slide rod slidably connected to the transverse position inside the through slot, one end of the slide rod being fixedly connected to the mating plate, and the top end of the mating plate being fixedly connected to the side of the slider.

[0010] Preferably, the other end of the slide rod is fixedly connected to the outer surface of the sleeve, the sleeve is slidably connected to the shaft, one end of the shaft is rotatably connected to the bearing seat, the top end of the bearing seat is fixedly connected to the inner wall of the T-shaped platform, one end of the shaft is fixedly connected to the output end of the servo motor, and the servo motor is fixedly mounted on the bearing seat.

[0011] Preferably, the outer surface of the other end of the shaft is provided with an external thread, a sliding sleeve is threaded to the other end of the shaft, a spring is sleeved on the shaft, and the two ends of the spring are fixedly connected to one side of the sleeve and one side of the sliding sleeve, respectively.

[0012] Preferably, the sliding sleeve is symmetrically and fixedly connected with pins, and a first pulley is rotatably connected to the pins. A positioning plate is fixedly connected inside the T-shaped platform, and sliding grooves are opened on both sides of the positioning plate. The first pulley is slidably connected inside the sliding grooves.

[0013] Preferably, the sliding assembly includes a movable groove formed at the top of the T-shaped platform. A frame is fixedly connected to the top of the T-shaped platform at both sides of the movable groove. A pair of crossbars is fixedly connected between the frame members. A support plate is provided at the top of the pair of crossbars. Rollers are rotatably connected to the four corners of the bottom surface of the support plate. The rollers are slidably connected to the surface of the crossbars.

[0014] Preferably, the pallets are provided in pairs, and a top plate is fixedly connected to the middle position of the top surface of the pair of pallets, and a second shaft pin is fixedly connected to the middle position of the top surface of the top plate.

[0015] Preferably, the test assembly includes a card plate fixedly installed at the center of the bottom surface of the top plate, a guide rail fixedly connected to the bottom end of the card plate, an insert shaft provided inside the guide rail, a second pulley rotatably connected to the insert shaft, and the second pulley slidably connected inside the guide rail.

[0016] Preferably, the bottom end of the insertion shaft is fixedly connected to the arm plate, the other end of the arm plate is fixedly connected to the main shaft, the bottom end of the main shaft is fixedly connected to the output end of the drive motor, the drive motor is fixedly installed on the bottom surface of the shelf, and the shelf is fixedly installed on the base plate.

[0017] In summary, the present invention has the following beneficial effects: 1. The present invention has a reasonable structure. One end of the connecting rod is sleeved on the first axle pin. The connecting rod is then limited by the rotation of the baffle. The testing component causes the connecting rod to pull back the first axle pin as a whole. The movement of the first axle pin causes the slider to slide on the slide rail. Then, the docking plate causes the sleeve to slide on the shaft through the slide rod, which facilitates the compression of the spring. The operation of the servo motor causes the shaft to rotate. The sliding sleeve is threaded to one end of the shaft. The rotation of the shaft causes the sliding sleeve to move. The movement of the sliding sleeve causes the first pulley to slide inside the slide groove, thereby adjusting the spring force and increasing the test strength of the connecting rod.

[0018] 2. In this invention, when the top plate moves back and forth, the drive motor on the bottom surface of the shelf operates, and the operation of the drive motor causes the main shaft to rotate. An arm plate is fixedly connected to the top of the main shaft. The rotation of the main shaft causes the arm plate to rotate, and the rotation of the arm plate causes the second pulley on the insert shaft to slide inside the guide rail, thereby facilitating the back and forth movement of the guide rail. The movement of the guide rail drives the top plate to move back and forth through the clamping plate.

[0019] 3. In this invention, the top plate is moved back and forth by the testing component. The bottom end of the top plate is fixedly connected to the support plate. The movement of the top plate causes the support plate to move. Rollers are rotatably connected to the bottom surface of the support plate and are slidably connected to the crossbar. The movement of the support plate causes the rollers to slide on the crossbar, increasing the stability of the overall movement of the top plate. The other end of the connecting rod is sleeved on the second axle pin. The fatigue resistance test of the connecting rod is performed by moving back and forth through the second axle pin. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the base plate; Figure 2 This is a side view of the three-dimensional structure of the base plate; Figure 3 This is a schematic diagram of the three-dimensional structure of the base plate from the rear. Figure 4 This is a schematic diagram of the T-shaped platform from below, showing its three-dimensional structure. Figure 5 This is a schematic diagram of a partial cross-sectional structure of the T-shaped platform; Figure 6 A schematic diagram of the positioning plate from a bottom view of its three-dimensional structure; Figure 7 This is a schematic diagram of the three-dimensional structure of the frame.

[0022] In the diagram: 1. Base plate; 101. T-shaped platform; 102. Slide rail; 103. Slider; 104. Bracket; 105. First axle pin; 106. Smart sensor; 107. Column; 108. Baffle; 2. Through groove; 201. Slide rod; 202. Connecting plate; 203. Sleeve; 204. Shaft; 205. Shaft seat; 206. Servo motor; 207. Sliding sleeve; 208. Spring; 209 1. Pin; 210. First pulley; 211. Positioning plate; 212. Slide groove; 3. Movable groove; 301. Frame; 302. Crossbar; 303. Support plate; 304. Roller; 305. Top plate; 306. Second shaft pin; 4. Clamping plate; 401. Guide rail; 402. Insert shaft; 403. Second pulley; 404. Arm plate; 405. Main shaft; 406. Drive motor; 407. Storage plate. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example: Reference Figures 1-7The rock drill connecting rod durability fatigue testing device shown includes a base plate 1, a T-shaped platform 101 fixedly connected to the top surface of the base plate 1, a slide rail 102 fixedly connected to the top surface of the T-shaped platform 101, a slider 103 slidably connected to the surface of the slide rail 102, a bracket 104 fixedly connected to the top surface of the slider 103, a first shaft pin 105 fixedly connected to the top surface of the bracket 104, and a smart sensor 106 installed on the bottom surface of the bracket 104; it also includes a driven component, a sliding component, and a testing component. The driven component is located inside the T-shaped platform 101 for use with the slider 103, the sliding component is located on the top surface of the T-shaped platform 101 for moving the second shaft pin 306, and the testing component is located inside the T-shaped platform 101 for testing the connecting rod. A column 107 is fixedly connected to the top surface of the bracket 104, and a baffle 108 is rotatably connected to the top of the column 107, with one end of the baffle 108 located on one side of the first shaft pin 105.

[0025] Specifically, it should be noted that the servo motor 206 and the drive motor 406 are electrically connected to the control unit via wires. Their specific working principles are based on existing technologies and will not be elaborated on here. The intelligent sensor 106 can detect the pressure on the first shaft pin 105, thereby increasing the elastic force of the spring 208 through the control unit to simulate the high-strength test of the connecting rod.

[0026] In one embodiment of this invention, the driven component includes through slots 2 located on the front and rear sides of the T-shaped platform 101. A slide rod 201 is slidably connected to the transverse position inside the through slots 2. One end of the slide rod 201 is fixedly connected to the docking plate 202, and the top end of the docking plate 202 is fixedly connected to the side of the slider 103. The other end of the slide rod 201 is fixedly connected to the outer surface of the sleeve 203. The sleeve 203 is slidably connected to the shaft 204. One end of the shaft 204 is rotatably connected to the shaft seat 205, and the top end of the shaft seat 205 is fixedly connected to the inner wall of the T-shaped platform 101. One end of the shaft 204 is fixed to the output end of the servo motor 206. The servo motor 206 is fixedly mounted on the bearing seat 205. The outer surface of the other end of the shaft 204 is provided with an external thread. The other end of the shaft 204 is threadedly connected to a sliding sleeve 207. A spring 208 is sleeved on the shaft 204. The two ends of the spring 208 are fixedly connected to one side of the sleeve 203 and one side of the sliding sleeve 207, respectively. Pins 209 are symmetrically fixedly connected to the surface of the sliding sleeve 207. A first pulley 210 is rotatably connected to the pins 209. A positioning plate 211 is fixedly connected inside the T-shaped platform 101. Slide grooves 212 are opened on both sides of the positioning plate 211. The first pulley 210 is slidably connected inside the slide grooves 212.

[0027] Specifically, one end of the connecting rod is fitted onto the first axle pin 105, and the connecting rod is limited by the rotation of the baffle 108. The testing assembly causes the connecting rod to pull back the first axle pin 105 as a whole. The movement of the first axle pin 105 causes the slider 103 to slide on the slide rail 102. Then, the docking plate 202 causes the sleeve 203 to slide on the shaft 204 through the slide rod 201, which facilitates the compression of the spring 208. The operation of the servo motor 206 causes the shaft 204 to rotate. The sliding sleeve 207 is threaded to one end of the shaft 204. The rotation of the shaft 204 causes the sliding sleeve 207 to move. The movement of the sliding sleeve 207 causes the first pulley 210 to slide inside the slide groove 212, thereby adjusting the elasticity of the spring 208 and increasing the test strength of the connecting rod.

[0028] As one embodiment of this invention, the sliding assembly includes a movable groove 3 located at the top of the T-shaped platform 101. Frames 301 are fixedly connected to both sides of the movable groove 3 at the top of the T-shaped platform 101. A pair of crossbars 302 are fixedly connected between the frame bodies 301. A support plate 303 is provided at the top of the pair of crossbars 302. Rollers 304 are rotatably connected to the four corners of the bottom surface of the support plate 303. The rollers 304 are slidably connected to the surface of the crossbars 302. A pair of support plates 303 are provided. A top plate 305 is fixedly connected to the center of the top surface of the pair of support plates 303. A second shaft pin 306 is fixedly connected to the center of the top surface of the top plate 305.

[0029] Specifically, the test assembly moves the top plate 305 back and forth. The bottom end of the top plate 305 is fixedly connected to the support plate 303. The movement of the top plate 305 causes the support plate 303 to move. A roller 304 is rotatably connected to the bottom surface of the support plate 303, and the roller 304 is slidably connected to the crossbar 302. The movement of the support plate 303 causes the roller 304 to slide on the crossbar 302, increasing the stability of the overall movement of the top plate 305. The other end of the connecting rod is sleeved on the second axle pin 306, and the fatigue resistance test of the connecting rod is carried out by moving the second axle pin 306 back and forth.

[0030] As one embodiment of this invention, the test assembly includes a clamping plate 4 fixedly installed at the center of the bottom surface of the top plate 305. A guide rail 401 is fixedly connected to the bottom end of the clamping plate 4. An insert shaft 402 is provided inside the guide rail 401. A second pulley 403 is rotatably connected to the insert shaft 402. The second pulley 403 is slidably connected inside the guide rail 401. The bottom end of the insert shaft 402 is fixedly connected to the arm plate 404. The other end of the arm plate 404 is fixedly connected to the main shaft 405. The bottom end of the main shaft 405 is fixedly connected to the output end of the drive motor 406. The drive motor 406 is fixedly installed at the bottom surface of the shelf 407. The shelf 407 is fixedly installed on the base plate 1.

[0031] Specifically, when the top plate 305 moves back and forth, the drive motor 406 on the bottom surface of the shelf 407 operates. The operation of the drive motor 406 causes the main shaft 405 to rotate. The top end of the main shaft 405 is fixedly connected to the arm plate 404. The rotation of the main shaft 405 causes the arm plate 404 to rotate. The rotation of the arm plate 404 causes the second pulley 403 on the insert shaft 402 to slide inside the guide rail 401, thereby facilitating the back and forth movement of the guide rail 401. The movement of the guide rail 401 drives the top plate 305 to move back and forth through the clamping plate 4.

[0032] The working principle of this invention is as follows: One end of the connecting rod is sleeved on the first axle pin 105. The connecting rod is then limited by the rotation of the baffle 108. The testing component causes the connecting rod to pull back the first axle pin 105 as a whole. The movement of the first axle pin 105 causes the slider 103 to slide on the slide rail 102. Then, the docking plate 202 causes the sleeve 203 to slide on the shaft 204 through the slide rod 201, which facilitates the compression of the spring 208. The operation of the servo motor 206 causes the shaft 204 to rotate. The sliding sleeve 207 is threaded to one end of the shaft 204. The rotation of the shaft 204 causes the sliding sleeve 207 to move. The movement of the sliding sleeve 207 causes the first pulley 210 to slide inside the slide groove 212, thereby adjusting the elasticity of the spring 208 and increasing the testing strength of the connecting rod.

[0033] When the top plate 305 moves back and forth, the drive motor 406 on the bottom surface of the shelf 407 operates. The operation of the drive motor 406 causes the main shaft 405 to rotate. The top end of the main shaft 405 is fixedly connected to the arm plate 404. The rotation of the main shaft 405 causes the arm plate 404 to rotate. The rotation of the arm plate 404 causes the second pulley 403 on the insert shaft 402 to slide inside the guide rail 401, thereby facilitating the back and forth movement of the guide rail 401. The movement of the guide rail 401 drives the top plate 305 to move back and forth through the clamping plate 4.

[0034] The test assembly moves the top plate 305 back and forth. The bottom end of the top plate 305 is fixedly connected to the support plate 303. The movement of the top plate 305 causes the support plate 303 to move. A roller 304 is rotatably connected to the bottom surface of the support plate 303 and is slidably connected to the crossbar 302. The movement of the support plate 303 causes the roller 304 to slide on the crossbar 302, increasing the stability of the overall movement of the top plate 305. The other end of the connecting rod is sleeved on the second axle pin 306. The fatigue resistance test of the connecting rod is carried out by moving the second axle pin 306 back and forth.

[0035] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rock drill link endurance fatigue testing device, characterized in that, include: A base plate (1) is fixedly connected to a T-shaped platform (101) on its top surface. A slide rail (102) is fixedly connected to the top surface of the T-shaped platform (101). A slider (103) is slidably connected to the surface of the slide rail (102). A bracket (104) is fixedly connected to the top surface of the slider (103). A first shaft pin (105) is fixedly connected to the top surface of the bracket (104). A smart sensor (106) is installed on the bottom surface of the bracket (104). It also includes a driven component, a sliding component, and a test component. The driven component is disposed inside the T-shaped platform (101) for use with the slider (103). The sliding component is disposed on the top surface of the T-shaped platform (101) for moving the second shaft pin (306). The test component is disposed inside the T-shaped platform (101) for testing the connecting rod.

2. The rock drill connecting rod durability fatigue testing device according to claim 1, characterized in that: A column (107) is fixedly connected to the top surface of the bracket (104), and a baffle (108) is rotatably connected to the top of the column (107). One end of the baffle (108) is located on one side of the first axle pin (105).

3. The rock drill connecting rod durability fatigue testing device according to claim 1, characterized in that: The driven component includes through slots (2) opened on the front and rear sides of the T-shaped platform (101). A slide rod (201) is slidably connected to the transverse position inside the through slot (2). One end of the slide rod (201) is fixedly connected to the docking plate (202), and the top end of the docking plate (202) is fixedly connected to the side of the slider (103).

4. The rock drill connecting rod durability fatigue testing device according to claim 3, characterized in that: The other end of the slide rod (201) is fixedly connected to the outer surface of the sleeve (203). The sleeve (203) is slidably connected to the shaft (204). One end of the shaft (204) is rotatably connected to the bearing seat (205). The top end of the bearing seat (205) is fixedly connected to the inner wall of the T-shaped platform (101). One end of the shaft (204) is fixedly connected to the output end of the servo motor (206). The servo motor (206) is fixedly installed on the bearing seat (205).

5. The rock drill connecting rod durability fatigue testing device according to claim 4, characterized in that: The outer surface of the other end of the shaft (204) is provided with an external thread, and a sliding sleeve (207) is threadedly connected to the other end of the shaft (204). A spring (208) is sleeved on the shaft (204), and the two ends of the spring (208) are fixedly connected to one side of the sleeve (203) and one side of the sliding sleeve (207), respectively.

6. The rock drill connecting rod durability fatigue testing device according to claim 5, characterized in that: The sliding sleeve (207) is symmetrically and fixedly connected with pins (209), and a first pulley (210) is rotatably connected to the pins (209). A positioning plate (211) is fixedly connected inside the T-shaped platform (101). Slide grooves (212) are opened on both sides of the positioning plate (211), and the first pulley (210) is slidably connected inside the slide grooves (212).

7. The rock drill connecting rod durability fatigue testing device according to claim 1, characterized in that: The sliding assembly includes a movable groove (3) opened at the top of the T-shaped platform (101). The top of the T-shaped platform (101) is fixedly connected to the two sides of the movable groove (3). A pair of crossbars (302) are fixedly connected between the crossbars (301). A support plate (303) is provided at the top of the pair of crossbars (302). Rollers (304) are rotatably connected at the four corners of the bottom surface of the support plate (303). The rollers (304) are slidably connected to the surface of the crossbars (302).

8. The rock drill connecting rod durability fatigue testing device according to claim 7, characterized in that: The pallet (303) is provided in a pair, and a top plate (305) is fixedly connected to the middle position of the top surface of the pair of pallets (303), and a second shaft pin (306) is fixedly connected to the middle position of the top surface of the top plate (305).

9. The rock drill connecting rod durability fatigue testing device according to claim 8, characterized in that: The test assembly includes a card plate (4) fixedly installed at the center of the bottom surface of the top plate (305). A guide rail (401) is fixedly connected to the bottom end of the card plate (4). An insert shaft (402) is provided inside the guide rail (401). A second pulley (403) is rotatably connected to the insert shaft (402). The second pulley (403) is slidably connected inside the guide rail (401).

10. The rock drill connecting rod durability fatigue testing device according to claim 9, characterized in that: The bottom end of the insert shaft (402) is fixedly connected to the arm plate (404), the other end of the arm plate (404) is fixedly connected to the main shaft (405), the bottom end of the main shaft (405) is fixedly connected to the output end of the drive motor (406), the drive motor (406) is fixedly installed on the bottom surface of the shelf (407), and the shelf (407) is fixedly installed on the base plate (1).

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