Durable fatigue testing device and testing method for connecting rod of rock drill

Abstract

The invention relates to the technical field of rock drill testing, in particular to a rock drill connecting rod durability fatigue testing device and a testing method thereof. According to the technical scheme, the rock drill assembly comprises a first rock drill connecting rod, a second rock drill connecting rod is hinged to one side of the first rock drill connecting rod, and a rock drill base is hinged to one side of the second rock drill connecting rod. After the arc-shaped abutting block deflects, the lower surface of the arc-shaped abutting block extrudes the second pressure sensing block, and a worker can fully know the deformation positions of the first connecting rod connecting hole and the second connecting rod connecting hole through a computer; a height difference is generated between the height of the distance detection assembly and the height of the distance detection assembly when the bidirectional detection rod is in a normal state, and the distance detection assembly obtains change data through infrared rays, so that the data change of the change of the connecting position of the connecting rod is known, and the deformation data of the connecting rod under the action of two axial forces is accurately obtained. And the data precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rock drill testing, and in particular to a rock drill connecting rod durability fatigue testing device and a testing method thereof. Background Art

[0002] The rock drill connecting rod endurance fatigue test device can understand the fatigue life and failure mode of the connecting rod under different load conditions by performing endurance fatigue tests on the connecting rod. This helps designers optimize the structure and materials of the connecting rod and improve the reliability and durability of the connecting rod. Fatigue testing is an important part of the rock drill production process and can strictly inspect the quality of the connecting rod. Only connecting rods that pass fatigue testing can be put into use, thereby ensuring the overall quality and safety of the rock drill. Usually, during testing, the connecting rod may have multiple failure modes, such as fracture, crack extension, plastic deformation, etc. If the failure mode is not clear, it may affect the evaluation and analysis of the fatigue performance of the connecting rod.

[0003] In the patent document with the publication number CN100582725C, a fatigue test method for the working device of a hydraulic excavator is disclosed. The boom and the dipper arm, and the dipper arm and the bucket are connected according to the maximum digging posture of the working device. A set of actuators applies a longitudinal digging force load to the bucket of the rock drill, and another set of actuators applies a lateral rotary torque load to the bucket of the rock drill. The two sets of actuators are loaded alternately, and the stress-strain system test system monitors and analyzes the stress-strain condition of the entire working device to achieve a two-axis fatigue test of the working device of the rock drill. Then, by conducting a fatigue test of the two-axis working device under the maximum digging force state of the rock drill, the weak links in the design and manufacturing can be found, so as to propose technical improvements and optimization measures to increase the service life of the working device.

[0004] When the above device is in use, fatigue tests are performed on the surface of the bucket in two axes. The connecting rod and the rock drilling assembly may break, crack propagate, or undergo plastic deformation under the two-axis pressure. In particular, the influence of temperature or humidity is usually directly reflected at the connection of the connecting rod. The above device cannot clearly understand the specific damage of the connecting rod, and the overall detection efficiency is poor.

[0005] Therefore, the present application proposes a rock drill connecting rod durability fatigue testing device and a testing method thereof. Summary of the invention

[0006] The purpose of the present invention is to address the problem in the background technology that the connecting rod and bucket assembly may break, crack propagate, plastically deform, etc. under biaxial pressure, especially the influence of temperature or humidity, which is usually directly reflected in the connection of the connecting rod. The existing device cannot clearly understand the specific damage of the connecting rod, and the overall detection efficiency is poor. A rock drill connecting rod durability fatigue test device and a test method thereof are proposed.

[0007] The technical solution of the present invention is as follows: a rock drill connecting rod endurance fatigue testing device comprises a rock drill assembly, wherein the rock drill assembly comprises a first rock drill connecting rod, a second rock drill connecting rod is hingedly connected to one side of the first rock drill connecting rod, a rock drill base is hingedly connected to one side of the second rock drill connecting rod, a first connecting rod connecting hole is provided at the connection between the first rock drill connecting rod and the second rock drill connecting rod, a second connecting rod connecting hole is provided at the connection between the second rock drill connecting rod and the rock drill base, and a hydraulic rod assembly is provided between the second rock drill connecting rod and the first rock drill connecting rod and between the second rock drill connecting rod and the rock drill base;

[0008] Test support assemblies are arranged on both sides of the rock drill assembly, a corresponding position adjustment clamping assembly is installed on one side of the test support assembly, a positioning detection assembly is installed on one side of the corresponding position adjustment clamping assembly, and a plurality of connection detection assemblies are installed on the outer side of the positioning detection assembly;

[0009] The positioning detection component includes a plurality of two-way card edge blocks, a two-way detection rod is hinged on one side of the two-way card edge block, an auxiliary spring is fixedly installed at the connection between the two-way detection rod and the two-way card edge block, a distance detection component is fixedly installed on the side of the two-way card edge block facing the two-way detection rod, and a second pressure sensing block is provided on the other side of the two-way card edge block facing the two-way detection rod.

[0010] Optionally, an arc-shaped resistance block is fixedly installed on one side of the bidirectional detection rod, a pulley rod is fixedly installed on the bottom of the second pressure sensing block, a limit frame is slidably installed on the outer side of the pulley rod, the limit frame is fixedly installed on one side of the bidirectional card edge block, and a corresponding spring is fixedly installed at the connection between the pulley rod and the limit frame.

[0011] Optionally, the positioning detection component also includes a hollow long column, one side of the hollow long column is hinged with multiple groups of bidirectional hinged rods through a locking slide block, the side of the bidirectional hinged rod away from the hollow long column is hinged to one side of the bidirectional clamping block, and the multiple bidirectional clamping blocks are arranged in a circular shape about the outer side of the hollow long column.

[0012] Optionally, a middle detection column is slidably mounted on one side of the hollow long column, a hollow tube is fixedly mounted inside the hollow long column, and the middle detection column is slidably mounted inside the hollow tube.

[0013] Optionally, a first pressure sensing block is fixedly installed inside the hollow tube, a pressure transmission rod is fixedly installed on one side of the middle detection column passing through the hollow tube, and the first pressure sensing block is arranged in an adaptive state with the first pressure sensing block.

[0014] Optionally, a rubber limit spring is fixedly installed at the connection between the hollow tube and the pressure transmission rod, and a rubber limit block is fixedly installed on the side of the pressure transmission rod facing the first pressure sensing block.

[0015] Optionally, the test support assembly includes a test base, two threaded rods are rotatably installed on both sides of the test base, the outer sides of the threaded rods are threadedly connected with a positioning slide, the positioning slide is slidably installed on one side of the test base through a slideway of the test base, a forward and reverse motor is fixedly installed on the side of the positioning slide away from the second rock drill connecting rod, and a hydraulic telescopic column is fixedly installed on the bottom of the test base.

[0016] Optionally, the corresponding positioning adjustment clamping assembly includes a positioning turntable fixedly mounted on the output shaft of the forward and reverse motor, a sliding cavity positioning block is fixedly mounted on the side of the positioning slide away from the forward and reverse motor, a corresponding connecting rod is fixedly mounted on one side of the sliding cavity positioning block, and the corresponding connecting rod is fixedly mounted on one side of the hollow long column.

[0017] Optionally, the corresponding adjustment and clamping assembly also includes a plurality of arc-shaped shifting holes opened on one side of the positioning turntable, and the interiors of the plurality of arc-shaped shifting holes are slidably connected with the same number of shifting connecting columns, and the shifting connecting columns are slidably installed inside the sliding cavity positioning block, and the plurality of shifting connecting columns are fixedly installed on one side of a same number of two-way clamping edge blocks.

[0018] On the other hand, the present application provides a method for testing the durability fatigue of a rock drill connecting rod, comprising the following steps:

[0019] S1: The magnitude, frequency and waveform of the thrust of the hydraulic rod assembly on the connecting rod are controlled by a computer to simulate the force applied to the connecting rod under different working conditions, so that the hydraulic rod assembly generates a longitudinal thrust test of periodic load on the first rock drill connecting rod and the second rock drill connecting rod, and the first connecting rod connecting hole and the second connecting rod connecting hole;

[0020] S2: According to the test requirements, the hydraulic telescopic column performs telescopic movement to drive the test base to adjust the height according to the detection position of the rod;

[0021] S3: If the first connecting rod connection hole and the second connecting rod connection hole are to be inspected, the auxiliary forward and reverse motor drives the threaded rod to rotate, and the positioning slide slides along the slide rail provided on the test base under the guidance of the thread when the threaded rod rotates, and the positioning slide drives the positioning detection component to slide toward the position of the rock drill component through the corresponding adjustment clamping component, so that the middle detection column and the bidirectional detection rod are inserted into the first connecting rod connection hole and the second connecting rod connection hole;

[0022] S4: The bidirectional clamping block expands through the corresponding position adjustment clamping assembly, so that the bidirectional detection rod fits on the inner wall of the first connecting rod connection hole and the second connecting rod connection hole, so that the inner wall of the first connecting rod connection hole and the second connecting rod connection hole fully fits, and the situation of each position of the connecting rod connection is understood;

[0023] S5: A lateral test force is generated on the first connecting rod connection hole and the second connecting rod connection hole through the test support assembly. Under the transmission of the two-axis force, if the second connecting rod connection hole and the first connecting rod connection hole are deformed, the deformed position of the second connecting rod connection hole and the first connecting rod connection hole is squeezed with the joint of the two-way detection rod, and the arc-shaped stop block is deflected under the limit of the auxiliary spring. After the arc-shaped stop block is deflected, the lower surface squeezes the second pressure sensing block, and the staff learns the deformation position of the first connecting rod connection hole and the second connecting rod connection hole through the computer;

[0024] S6: If the surfaces of the first rock drill connecting rod and the second rock drill connecting rod are inspected, and the middle inspection column is in contact with the rod bodies of the first rock drill connecting rod and the second rock drill connecting rod, a positioning slide drives the connecting inspection assembly through the threaded rod to generate a lateral thrust on the second rock drill connecting rod and the first rock drill connecting rod, while the other positioning slide remains in its original position, and the middle inspection column is compressed to drive the pressure transmission rod to be squeezed with the first pressure sensing block, thereby generating inspection data;

[0025] S7: After the computer is responsible for monitoring and controlling the loading process, it compares the data of the distance detection component, the second pressure sensing block and the first pressure sensing block according to the preset test parameters to understand the durability fatigue condition of the connecting rod.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. If there is a problem at the connecting part of the connecting rod, that is, the connecting hole of the second connecting rod and the connecting hole of the first connecting rod, the lower surface of the arc-shaped block will squeeze the second pressure sensing block after deflection, and the staff can fully understand the deformation position of the connecting hole of the first connecting rod and the connecting hole of the second connecting rod through the computer. The other end of the two-way detection rod deflects upward, and the height difference between the distance detection component and the height of the distance detection component when the two-way detection rod is in normal state is generated. The distance detection component obtains the change data through infrared rays, and then understands the data change caused by the change of the connecting rod connection position, so as to more accurately obtain the deformation data of the connecting rod under the action of two-axis force, thereby improving the accuracy of the data;

[0028] 2. If the rods of the first rock drill connecting rod and the second rock drill connecting rod are broken, cracks expand, or plastically deformed, the pressure transmission rod and the first pressure sensing block are squeezed by the pressure of the middle detection column. At the same time, the pressure transmission rod is limited and buffered by the elastic force of the rubber limit block during the sliding process along the surface of the first pressure sensing block, thereby reducing the vibration of the pressure transmission rod when it is stressed and affecting the accuracy of the detection result, and also improving the service life of the pressure transmission rod;

[0029] 3. The positioning turntable drives the transposition connecting column to expand outward along the sliding cavity positioning block through the arc-shaped transposition hole, causing the two-way clamping block to expand outward from the state of being fitted on the hollow long column until the arc-shaped stop block can fit on the inner wall of the first connecting rod connecting hole or the second connecting rod connecting hole, thereby accurately understanding the changes in various directions of the first rock drill connecting rod and the second rock drill connecting rod under stress, thereby improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A structural schematic diagram of a rock drill connecting rod durability fatigue testing device of the present invention is provided;

[0031] Figure 2 A structural schematic diagram of the corresponding position adjustment clamping assembly of the present invention is given;

[0032] Figure 3 The present invention is given Figure 2 Enlarged view of the middle A area;

[0033] Figure 4 A structural schematic diagram of a hollow long column of the present invention is provided;

[0034] Figure 5 The present invention is given Figure 4 Enlarged view of the middle B area;

[0035] Figure 6 A schematic structural diagram of a first pressure sensing block of the present invention is provided;

[0036] Figure 7 A structural schematic diagram of the positioning slide of the present invention is given;

[0037] Figure 8 A structural schematic diagram of the positioning turntable of the present invention is given;

[0038] Fig. 9 The present invention is given Figure 8 Enlarged view of the middle C area;

[0039] Fig.10 The present invention is given Figure 8 Enlarged view of the middle D area.

[0040] Figure numerals: 1. rock drill assembly; 101. first rock drill connecting rod; 102. second rock drill connecting rod; 103. rock drill base; 104. first connecting rod connecting hole; 105. second connecting rod connecting hole; 2. test support assembly; 201. test base; 202. threaded rod; 203. positioning slide; 204. forward and reverse motor; 205. hydraulic telescopic column; 206. corresponding connecting rod; 3. corresponding position adjustment clamping assembly; 301. positioning turntable; 302. slide cavity positioning block; 303. transposition connecting column; 304. arc transposition hole; 4. fixed Position detection component; 401, hollow long column; 402, positioning slide block; 403, two-way hinged rod; 404, two-way edge block; 405, middle detection column; 406, hollow tube; 407, pressure transmission rod; 408, rubber limit spring; 409, first pressure sensing block; 410, rubber limit block; 5, connection detection component; 501, arc-shaped block; 502, two-way detection rod; 503, distance detection component; 504, auxiliary spring; 505, corresponding spring; 506, second pressure sensing block; 507, limit frame; 508, pulley rod. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0042] like Figure 1-Figure 3As shown, the rock drill connecting rod durability fatigue testing device proposed by the present invention comprises a rock drill assembly 1, wherein the rock drill assembly 1 comprises a first rock drill connecting rod 101, a second rock drill connecting rod 102 is hingedly connected to one side of the first rock drill connecting rod 101, a rock drill base 103 is hingedly connected to one side of the second rock drill connecting rod 102, a first connecting rod connecting hole 104 is provided at the connection between the first rock drill connecting rod 101 and the second rock drill connecting rod 102, and a second connecting rod connecting hole 104 is provided at the connection between the second rock drill connecting rod 102 and the rock drill base 103. 5. A hydraulic rod assembly is provided between the second rock drill connecting rod 102 and the first rock drill connecting rod 101 and between the second rock drill connecting rod 102 and the rock drill base 103. The hydraulic rod assembly is used to generate a longitudinal thrust on the second rock drill connecting rod 102 and the first connecting rod connecting hole 104 or the first connecting rod connecting hole 104 and the second connecting rod connecting hole 105, thereby performing a longitudinal thrust test on the first rock drill connecting rod 101 and the second rock drill connecting rod 102, and the first connecting rod connecting hole 104 and the second connecting rod connecting hole 105.

[0043] The rock drill assembly 1 is provided with a test support assembly 2 on both sides, a corresponding position adjustment clamping assembly 3 is installed on one side of the test support assembly 2, a positioning detection assembly 4 is installed on one side of the corresponding position adjustment clamping assembly 3, and a plurality of connection detection assemblies 5 are installed on the outer side of the positioning detection assembly 4. The test support assembly 2 includes a test base 201, two threaded rods 202 are rotatably installed on both sides of the test base 201, and the outer side of the threaded rod 202 is threadedly connected with a positioning slide 203, and the positioning slide 203 is slidably installed on one side of the test base 201 through the slideway of the test base 201, and a forward and reverse motor 204 is fixedly installed on the side of the positioning slide 203 away from the second rock drill connecting rod 102, and a hydraulic telescopic column 205 is fixedly installed on the bottom of the test base 201. The hydraulic telescopic column 205 performs telescopic movement to drive the test base 201 to adjust its height according to the position of the first connecting rod connecting hole 104 or the second connecting rod connecting hole 105, and the auxiliary forward and reverse motor 204 fixedly installed on the test base 201 The machine drives the threaded rod 202 to rotate, and the positioning slide 203 slides along the slide rail provided on the test base 201 by the guidance of the thread when the threaded rod 202 rotates. The positioning slide 203 drives the positioning detection component 4 to slide toward the position of the rock drill component 1 through the corresponding adjustment clamping component 3, so that the middle detection column 405 and the two-way detection rod 502 are inserted into the first connecting rod connection hole 104 or the second connecting rod connection hole 105, and the middle detection column 405 and the first rock drill connecting rod can also be connected. 101 or the second rock drill connecting rod 102 is in direct contact, and as a positioning slide 203 drives the connection detection component 5 through the threaded rod 202 to generate a lateral thrust on the second rock drill connecting rod 102 or the first rock drill connecting rod 101, the other positioning slide 203 remains in place and does not move, thereby generating a lateral test force on the connection shaft of the first rock drill connecting rod 101 and the second rock drill connecting rod 102 and the surfaces of the second rock drill connecting rod 102 and the first rock drill connecting rod 101.

[0044] like Figure 7-10As shown, the corresponding adjustment and clamping assembly 3 includes a positioning turntable 301 fixedly mounted on the output shaft of the forward and reverse motor 204, a sliding cavity positioning block 302 is fixedly mounted on the side of the positioning slide 203 away from the forward and reverse motor 204, a corresponding connecting rod 206 is fixedly mounted on one side of the sliding cavity positioning block 302, and the corresponding connecting rod 206 is fixedly mounted on one side of the hollow long column 401, and the corresponding adjustment and clamping assembly 3 also includes a plurality of arc-shaped transposition holes 304 opened on one side of the positioning turntable 301, and the interiors of the plurality of arc-shaped transposition holes 304 are slidably connected with the same number of transposition connecting columns 303, and the transposition connecting columns 303 are slidably mounted inside the sliding cavity positioning block 302, and the plurality of transposition connecting columns 303 are fixedly mounted on one side of the two-way card edge blocks 404 of the same number, and the two The edge block 404 is first attached to the surface of the hollow long column 401, and is inserted into the first connecting rod connecting hole 104 or the second connecting rod connecting hole 105 through the transmission of the positioning slide 203. The output shaft of the forward and reverse motor 204 drives the positioning turntable 301 to rotate, and the positioning turntable 301 drives the transposition connecting column 303 to expand outward along the sliding cavity positioning block 302 through the arc-shaped transposition hole 304, so that the two-way edge block 404 expands outward from the state of being attached to the hollow long column 401 until the arc-shaped support block 501 can be attached to the inner wall of the first connecting rod connecting hole 104 or the second connecting rod connecting hole 105, so as to accurately understand the changes in various directions of the first rock drill connecting rod 101 and the second rock drill connecting rod 102 under the force state, thereby improving the detection efficiency.

[0045] like Figure 2-Figure 6As shown, the positioning detection component 4 also includes a hollow long column 401, one side of the hollow long column 401 is hinged with multiple groups of two-way hinged rods 403 through a positioning slide block 402, and the side of the two-way hinged rod 403 away from the hollow long column 401 is hinged on one side of a two-way clamping block 404, and multiple two-way clamping blocks 404 are arranged in a circular shape with respect to the outer side of the hollow long column 401. When the two-way clamping block 404 is driven by the corresponding adjustment clamping component 3 and expands outward to fully fit the inner wall of the first connecting rod connecting hole 104 or the second connecting rod connecting hole 105, the two-way hinged rod 4 03 According to the transmission of the force of the two-way card edge block 404, the two-way card edge block 404 is deflected, and the moving distance of the two-way card edge block 404 is limited. A middle detection column 405 is slidably installed on one side of the hollow long column 401, and a hollow tube 406 is fixedly installed inside the hollow long column 401. The middle detection column 405 is slidably installed inside the hollow tube 406, and a first pressure sensing block 409 is fixedly installed inside the hollow tube 406. A pressure transmission rod 407 is fixedly installed on one side of the middle detection column 405 passing through the hollow tube 406. The first pressure sensing block 409 and the first pressure sensing block 409 are connected to each other. 09 is arranged in an adaptive state, a rubber limit spring 408 is fixedly installed at the connection between the hollow tube 406 and the pressure transmission rod 407, and the rubber limit spring 408 is used to restore the pressure transmission rod 407 to its original position after being moved by an external force, and a rubber limit block 410 is fixedly installed on the side of the pressure transmission rod 407 facing the first pressure sensing block 409. When a horizontal thrust is applied to the first rock drill connecting rod 101 or the second rock drill connecting rod 102 through a test support assembly 2, if the rod parts of the first rock drill connecting rod 101 and the second rock drill connecting rod 102 themselves are broken, When cracks expand or plastic deformation occurs, the damaged position of the rod comes into contact with the middle detection column 405 on another test support assembly 2. The middle detection column 405 is compressed to drive the pressure transmission rod 407 and the first pressure sensing block 409 to be squeezed to generate detection data. At the same time, the pressure transmission rod 407 is limited and buffered by the elastic force of the rubber limit block 410 while sliding along the surface of the first pressure sensing block 409, thereby reducing the vibration of the pressure transmission rod 407 when it is under force and affecting the accuracy of the detection results, and also improving the service life of the pressure transmission rod 407.

[0046] In this embodiment, Figure 2-Figure 5As shown, the positioning detection component 4 includes a plurality of two-way card edge blocks 404, one side of the two-way card edge block 404 is hinged with a two-way detection rod 502, and an auxiliary spring 504 is fixedly installed at the connection between the two-way detection rod 502 and the two-way card edge block 404, and a distance detection component 503 is fixedly installed on the side of the two-way card edge block 404 facing the two-way detection rod 502, and a second pressure sensing block 506 is arranged on the other side of the two-way card edge block 404 facing the two-way detection rod 502. The two-way card edge block 404 expands through the corresponding adjustment clamping component 3, so that the two-way detection rod 502 is attached to the inner walls of the first connecting rod connecting hole 104 and the second connecting rod connecting hole 105, so that the first connecting rod connecting hole 104 and the inner walls of the second connecting rod connecting hole 105 are fully attached, so that the conditions of various positions of the connecting rod connection can be understood, and the two-way detection rod 502 is parallel to the ground under normal conditions. If the axial connection of the connecting rod, that is, the second connecting rod connecting hole 105 and the first connecting rod connecting hole 104 are affected by temperature or humidity When the degree of deformation occurs or when it is squeezed by the two-axis force and breaks, cracks expand, or plastically deforms, the deformation position of the second connecting rod connecting hole 105 and the first connecting rod connecting hole 104 is squeezed at the joint of the two-way detection rod 502. At this time, the arc-shaped stop block 501 is deflected under the limit of the auxiliary spring 504. After the arc-shaped stop block 501 is deflected, the lower surface squeezes the second pressure sensing block 506. The staff can fully understand the deformation position of the first connecting rod connecting hole 104 and the second connecting rod connecting hole 105 through the computer. After the two-way detection rod 502 is deflected, its other end deflects upward, and a height difference is generated between the height of the distance detection component 503 and the height of the distance detection component 503 when the two-way detection rod 502 is in normal state. The distance detection component 503 obtains change data through infrared rays, and then understands the data change of the change in the connecting rod connection position, thereby more accurately obtaining the deformation data of the connecting rod under the action of two-axis forces, thereby improving the accuracy of the data.

[0047] A curved stopper 501 is fixedly installed on one side of the two-way detection rod 502. The curved stopper 501 is curved and can better fit on the inner wall of the first connecting rod connection hole 104 or the second connecting rod connection hole 105, so as to understand the changes in the connecting rod connection. A pulley rod 508 is fixedly installed on the bottom of the second pressure sensing block 506. A limit frame 507 is slidably installed on the outer side of the pulley rod 508. The limit frame 507 is fixedly installed on one side of the two-way card edge block 404. A corresponding spring 505 is fixedly installed at the connection between the pulley rod 508 and the limit frame 507. When the first connecting rod is in the state of being pressed, the pulley rod 508 is pressed against the limit frame 507. When the rod connecting hole 104 and the second connecting rod connecting hole 105 are subjected to the force of two axes to cause fracture, crack extension, and plastic deformation, the bidirectional detection rod 502 squeezes the second pressure sensing block 506 according to the internal force deformation of the first connecting rod connecting hole 104 and the second connecting rod connecting hole 105, and the second pressure sensing block 506 obtains pressure data according to the external pressure. The second pressure sensing block 506 drives the pulley rod 508 to buffer along the limit frame 507 through the elastic force of the corresponding spring 505, thereby avoiding damage to the sensor component due to excessive pressure, thereby extending the life of the sensor.

[0048] On the other hand, the present application provides a method for testing the durability fatigue of a rock drill connecting rod, comprising the following steps:

[0049] S1: The magnitude, frequency and waveform of the thrust of the hydraulic rod assembly on the connecting rod are controlled by a computer to simulate the force borne by the connecting rod under different working conditions, so that the hydraulic rod assembly generates a longitudinal thrust test of a periodic load on the first rock drill connecting rod 101 and the second rock drill connecting rod 102, and the first connecting rod connecting hole 104 and the second connecting rod connecting hole 105;

[0050] S2: According to the test requirements, the hydraulic telescopic column 205 performs telescopic movement to drive the test base 201 to adjust the height according to the detection position of the rod;

[0051] S3: If the first connecting rod connection hole 104 and the second connecting rod connection hole 105 are to be inspected, the auxiliary forward and reverse motor drives the threaded rod 202 to rotate, and the positioning slide 203 slides along the slide rail provided on the test base 201 under the guidance of the thread when the threaded rod 202 rotates. The positioning slide 203 drives the positioning detection component 4 to slide toward the position of the rock drill component 1 through the corresponding adjustment clamping component 3, so that the middle detection column 405 and the bidirectional detection rod 502 are inserted into the first connecting rod connection hole 104 and the second connecting rod connection hole 105;

[0052] S4: The bidirectional clamping block 404 expands through the corresponding position adjustment clamping assembly 3, so that the bidirectional detection rod 502 fits on the inner walls of the first connecting rod connection hole 104 and the second connecting rod connection hole 105, so that the inner walls of the first connecting rod connection hole 104 and the second connecting rod connection hole 105 fully fit together, and the conditions of each position of the connecting rod connection are understood;

[0053] S5: A lateral test force is generated on the first connecting rod connection hole 104 and the second connecting rod connection hole 105 by the test support assembly 2. Under the transmission of the two-axis force, if the second connecting rod connection hole 105 and the first connecting rod connection hole 104 are deformed, the deformed position of the second connecting rod connection hole 105 and the first connecting rod connection hole 104 is squeezed with the joint of the two-way detection rod 502, and the arc-shaped stop block 501 is deflected under the limit of the auxiliary spring 504. After the arc-shaped stop block 501 is deflected, the lower surface squeezes the second pressure sensing block 506, and the staff learns the deformation position of the first connecting rod connection hole 104 and the second connecting rod connection hole 105 through the computer;

[0054] S6: If the surfaces of the first rock drill connecting rod 101 and the second rock drill connecting rod 102 are inspected, and the middle inspection column 405 fits with the rods of the first rock drill connecting rod 101 and the second rock drill connecting rod 102, one positioning slide 203 drives the connection inspection component 5 through the threaded rod 202 to generate a lateral thrust on the second rock drill connecting rod 102 and the first rock drill connecting rod 101, while the other positioning slide 203 remains in its original position, and the middle inspection column 405 is compressed to drive the pressure transmission rod 407 and the first pressure sensing block 409 to be squeezed, thereby generating inspection data;

[0055] S7: After the computer is responsible for monitoring and controlling the loading process, it compares the data of the distance detection component 503, the second pressure sensing block 506 and the first pressure sensing block 409 according to the preset test parameters to understand the durability fatigue status of the connecting rod.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0057] "Comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0058] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A rock drill connecting rod endurance fatigue testing device, comprising a rock drill assembly (1), the rock drill assembly (1) comprising a first rock drill connecting rod (101), a second rock drill connecting rod (102) being hingedly connected to one side of the first rock drill connecting rod (101), a rock drill base (103) being hingedly connected to one side of the second rock drill connecting rod (102), a first connecting rod connecting hole (104) being provided at the connection between the first rock drill connecting rod (101) and the second rock drill connecting rod (102), a second connecting rod connecting hole (105) being provided at the connection between the second rock drill connecting rod (102) and the rock drill base (103), a hydraulic rod assembly being provided between the second rock drill connecting rod (102) and the first rock drill connecting rod (101) and between the second rock drill connecting rod (102) and the rock drill base (103), characterized in that: The rock drill assembly (1) is provided with test support assemblies (2) on both sides, a corresponding position adjustment clamping assembly (3) is installed on one side of the test support assembly (2), a positioning detection assembly (4) is installed on one side of the corresponding position adjustment clamping assembly (3), and a plurality of connection detection assemblies (5) are installed on the outer side of the positioning detection assembly (4); The positioning detection assembly (4) comprises a plurality of bidirectional edge clamping blocks (404), one side of the bidirectional edge clamping block (404) is hingedly connected to a bidirectional detection rod (502), an auxiliary spring (504) is fixedly installed at the connection between the bidirectional detection rod (502) and the bidirectional edge clamping block (404), a distance detection assembly (503) is fixedly installed on one side of the bidirectional edge clamping block (404) facing the bidirectional detection rod (502), and a second pressure sensing block (506) is arranged on the other side of the bidirectional edge clamping block (404) facing the bidirectional detection rod (502).

2. The rock drill connecting rod durability fatigue testing device according to claim 1, characterized in that: An arc-shaped stop block (501) is fixedly mounted on one side of the bidirectional detection rod (502); a pulley rod (508) is fixedly mounted on the bottom of the second pressure sensing block (506); a limit frame (507) is slidably mounted on the outer side of the pulley rod (508); the limit frame (507) is fixedly mounted on one side of the bidirectional edge clamping block (404); and a corresponding spring (505) is fixedly mounted at the connection between the pulley rod (508) and the limit frame (507).

3. The rock drill connecting rod durability fatigue testing device according to claim 2, characterized in that: The positioning detection component (4) also includes a hollow long column (401), one side of the hollow long column (401) is hinged with multiple groups of bidirectional hinged rods (403) through a locking slide block (402), the side of the bidirectional hinged rod (403) away from the hollow long column (401) is hinged to one side of a bidirectional clamping block (404), and the multiple bidirectional clamping blocks (404) are arranged in a ring shape with respect to the outer side of the hollow long column (401).

4. The rock drill connecting rod durability fatigue testing device according to claim 3, characterized in that: A middle detection column (405) is slidably mounted on one side of the hollow long column (401), a hollow tube (406) is fixedly mounted inside the hollow long column (401), and the middle detection column (405) is slidably mounted inside the hollow tube (406).

5. The rock drill connecting rod durability fatigue testing device according to claim 4, characterized in that: A first pressure sensing block (409) is fixedly mounted inside the hollow tube (406), a pressure transmission rod (407) is fixedly mounted on one side of the middle detection column (405) passing through the hollow tube (406), and the first pressure sensing block (409) and the second pressure sensing block (409) are arranged in a matching state.

6. The rock drill connecting rod durability fatigue testing device according to claim 5, characterized in that: A rubber limit spring (408) is fixedly installed at the connection between the hollow tube (406) and the pressure transmission rod (407), and a rubber limit block (410) is fixedly installed on the side of the pressure transmission rod (407) facing the first pressure sensing block (409).

7. The rock drill connecting rod durability fatigue testing device according to claim 6, characterized in that: The test support assembly (2) comprises a test base (201), two threaded rods (202) are rotatably mounted on both sides of the test base (201), the outer sides of the threaded rods (202) are threadedly connected to positioning slides (203), the positioning slides (203) are slidably mounted on one side of the test base (201) through a slideway of the test base (201), a forward and reverse motor (204) is fixedly mounted on a side of the positioning slide (203) away from the second rock drill connecting rod (102), and a hydraulic telescopic column (205) is fixedly mounted on the bottom of the test base (201).

8. The rock drill connecting rod durability fatigue testing device according to claim 7, characterized in that: The corresponding position adjustment clamping assembly (3) comprises a positioning turntable (301) fixedly mounted on the output shaft of the forward and reverse motor (204); a slide cavity positioning block (302) is fixedly mounted on the side of the positioning slide seat (203) away from the forward and reverse motor (204); a corresponding connecting rod (206) is fixedly mounted on one side of the slide cavity positioning block (302); and the corresponding connecting rod (206) is fixedly mounted on one side of the hollow long column (401).

9. The rock drill connecting rod durability fatigue testing device according to claim 8, characterized in that: The corresponding position adjustment clamping assembly (3) further comprises a plurality of arc-shaped position-changing holes (304) opened on one side of the positioning turntable (301), the interiors of the plurality of arc-shaped position-changing holes (304) being slidably connected with the same number of position-changing connecting columns (303), the position-changing connecting columns (303) being slidably mounted inside the sliding cavity positioning block (302), and the plurality of position-changing connecting columns (303) being fixedly mounted on one side of the same number of bidirectional clamping edge blocks (404).

10. A method for testing the durability fatigue of a rock drill connecting rod, using the device for testing the durability fatigue of a rock drill connecting rod according to claim 9, characterized in that: The following steps are involved: S1: The magnitude, frequency and waveform of the thrust of the hydraulic rod assembly on the connecting rod are controlled by a computer to simulate the force borne by the connecting rod under different working conditions, so that the hydraulic rod assembly generates a longitudinal thrust test of a periodic load on the first rock drill connecting rod (101) and the second rock drill connecting rod (102), and the first connecting rod connecting hole (104) and the second connecting rod connecting hole (105); S2: According to the test requirements, the hydraulic telescopic column (205) performs telescopic movement to drive the test base (201) to adjust the height according to the detection position of the rod; S3: If the first connecting rod connection hole (104) and the second connecting rod connection hole (105) are to be inspected, the auxiliary forward and reverse motor drives the threaded rod (202) to rotate, and the positioning slide (203) slides along the slide rail provided on the test base (201) under the guidance of the thread when the threaded rod (202) rotates. The positioning slide (203) drives the positioning inspection component (4) to slide toward the position of the rock drill component (1) through the corresponding adjustment clamping component (3), so that the middle inspection column (405) and the bidirectional inspection rod (502) are inserted into the first connecting rod connection hole (104) and the second connecting rod connection hole (105); S4: The bidirectional clamping block (404) expands the corresponding position adjustment clamping assembly (3), causing the bidirectional detection rod (502) to fit the inner walls of the first connecting rod connection hole (104) and the second connecting rod connection hole (105), so that the inner walls of the first connecting rod connection hole (104) and the second connecting rod connection hole (105) are fully fitted together, and the conditions of each position of the connecting rod connection are understood; S5: A lateral test force is generated on the first connecting rod connection hole (104) and the second connecting rod connection hole (105) by the test support assembly (2). Under the transmission of the two-axis force, if the second connecting rod connection hole (105) and the first connecting rod connection hole (104) are deformed, the deformed position of the second connecting rod connection hole (105) and the first connecting rod connection hole (104) are squeezed at the joint of the two-way detection rod (502), and the arc-shaped stop block (501) is deflected under the limit of the auxiliary spring (504). After the arc-shaped stop block (501) is deflected, the lower surface squeezes the second pressure sensing block (506), and the staff learns the deformed position of the first connecting rod connection hole (104) and the second connecting rod connection hole (105) through the computer; S6: If the surfaces of the first rock drill connecting rod (101) and the second rock drill connecting rod (102) are inspected, and the middle inspection column (405) fits the rod bodies of the first rock drill connecting rod (101) and the second rock drill connecting rod (102), then one positioning slide (203) drives the connection inspection component (5) through the threaded rod (202) to generate a lateral thrust on the second rock drill connecting rod (102) and the first rock drill connecting rod (101), while the other positioning slide (203) remains in its original position and does not move. The middle inspection column (405) is compressed to drive the pressure transmission rod (407) and the first pressure sensing block (409) to be squeezed, thereby generating inspection data; S7: After the computer is responsible for monitoring and controlling the loading process, it compares the data of the distance detection component (503), the second pressure sensing block (506) and the first pressure sensing block (409) according to the preset test parameters to understand the durability fatigue condition of the connecting rod.

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