A supporting strength detection device for mining

Abstract

The utility model discloses a kind of supporting strength detection devices for mining, cam and first pulley are rotated by vibration motor, second pulley drives reducer to run by belt drive, its output end driving rod rotates, by connecting rod in arc slide rail sliding, reciprocating knock supporting by driving rocker and beating hammer.When support is curved upwards by side hydraulic cylinder pressure, beating hammer swing stroke is shortened downwards, sliding block is made to slide up by resistance through mounting rod, reset spring is compressed, arc slide rail moves up with mounting rod.The device can simulate the influence of various impact forces on the supporting strength, by setting knock vibration component and extrusion component to simulate the influence of vibration force, knocking force and extrusion force on support, by simultaneously through cam simulating vibration force, beating hammer simulating knocking force and hydraulic cylinder to exert thrust to side to detect the strength of support.

Description

Technical Field

[0001] This utility model relates to the field of support strength testing technology, specifically a support strength testing device for mining. Background Technology

[0002] To ensure that the mine shaft does not collapse or deform under the support, high-strength steel is required to manufacture the support. Then, the support needs to undergo strength testing. Chinese patent CN217211915U (A Support Strength Testing Device for Mining) describes a device that, by twisting bolts on both sides, allows measuring rods to move, bringing multiple measuring rods into contact with the support body. Twisting the bolts locks them in place with nuts, thus securing the measuring rods. Then, opening the first electric telescopic rod causes a slider to press against the support body, allowing for strength testing of the support body. The strength testing agency can compress the support surface to test the main strength of the support. However, when the support is installed in the mine, it faces multiple types and directions of impact forces. The disclosed document cannot test the strength of the support side when subjected to compression. Moreover, the existing technology can only test the support under a single influence. The support in the mine is easily affected by other influences such as vibration and impact, and it cannot detect the deformation of the support in response to the above impact forces, resulting in low testing flexibility. Utility Model Content

[0003] The purpose of this invention is to provide a support strength testing device for mining, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a support strength testing device for mining, comprising a frame, and further comprising a striking vibration assembly and a pressing assembly.

[0005] The impact vibration assembly includes: a cam and a hammer. The cam is rotatably mounted in the frame and can contact and connect with the upper surface of the support to cause the support to vibrate. A first pulley is coaxially fixedly mounted on the cam. A belt with the other end of the belt is sleeved on the first pulley and sleeved on the second pulley. The second pulley is fixedly mounted on the input end of a reducer used to reduce the speed of the drive rod. The input end of the reducer is fixedly connected to the output end of the vibration motor.

[0006] The output end of the reducer is fixedly connected to the splined rod of the clutch assembly. The clutch assembly can change the working state of the drive rod. The splined rod can engage with the driven rod inside the clutch. The driven rod inside the clutch is fixedly connected to one end of the drive rod. The other end of the drive rod is hinged to one end of the first connecting rod. The other end of the first connecting rod is hinged to one end of the second connecting rod. The second connecting rod is hinged to the middle of the rocker arm that realizes reciprocating swing. The upper end of the rocker arm is hinged to the mounting rod. The mounting rod is fixedly installed on the slider that can slide up and down. The slider is longitudinally slidably installed in the sliding frame. The slider can slide along the extension direction of the sliding frame. The lower end of the rocker arm is fixedly connected to a hammer that can contact the support and reciprocate to strike the support.

[0007] The extrusion assembly includes a hydraulic cylinder and a first clamping plate. The hydraulic cylinder is fixedly installed inside the frame, and its output end is fixedly connected to the middle of the first clamping plate. The first clamping plate can engage with one end of the support. The first clamping plate is slidably installed inside the frame. The other end of the support is engaged with a second clamping plate. The second clamping plate is fixedly installed inside the frame. A detection assembly for detecting its deformation is installed below the support.

[0008] Preferably, the clutch assembly includes: a spline rod fixedly connected to the output end of the reducer; the spline rod being splinedly connected to a driven sleeve; the driven sleeve being sleeved on the surface of the spline rod; an end face tooth being provided at the end of the driven sleeve away from the spline rod; an annular groove being provided on the surface of this end; a sliding rod being slidably installed in the annular groove; the other end of the sliding rod being fixedly connected to a mounting ring; a driven rod being rotatably installed in the mounting ring; an end face tooth corresponding to the driven sleeve being provided at the end of the driven rod near the driven sleeve; the end face tooth on the driven rod being able to mesh with the end face tooth on the driven sleeve; and a drive rod being fixedly connected to the end of the driven rod away from the driven sleeve.

[0009] Preferably, the detection component includes: a fixed plate and a movable rod. The fixed plate is fixedly installed inside the frame. Seven sliding grooves are equidistantly arranged on the fixed plate. The movable rod is slidably installed in each sliding groove. The upper end of the movable rod can abut against the lower surface of the support. One end of a spring that can make the movable rod return to its original position is fixedly connected to the movable rod. The other end of the spring is fixedly connected to the fixed plate. The surface of the movable rod is provided with a scale.

[0010] Preferably, one end of a reset spring for resetting the slider is fixedly connected inside the sliding frame, and the other end of the reset spring is fixedly connected to the slider.

[0011] Preferably, two sliding plates can be detachably installed inside the frame, and a cam, a vibration motor, a reducer and a sliding frame are respectively installed on the two sliding plates.

[0012] Preferably, the width of the sliding plate is half the width of the support.

[0013] Preferably, the connecting ends of the first connecting rod and the second connecting rod are slidably installed inside the arc-shaped slide rail, the arc-shaped slide rail is longitudinally slidably installed on the sliding frame, and the arc-shaped slide rail is fixedly connected to the mounting rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This device can simulate the effect of various impact forces on the support strength. By setting up a hammering vibration component and a compression component, it simulates the effect of vibration force, hammering force and compression force on the support. The impact force is applied to the surface and sides of the support by a cam, hammer and hydraulic cylinder to detect the deformation of the support under hammering force, vibration force and compression force, and then detect the support strength.

[0016] 2. This device uses a clutch assembly to detect the strength of the support under different combinations of impact forces. By closing the clutch, vibration and impact can be applied simultaneously, or the clutch can be disengaged to apply only vibration force to the support and detect only the effect of vibration force on the support strength. Under different combinations of the above two impact forces, combined with the compressive force applied by the hydraulic cylinder, different combinations of three impact forces can be achieved to detect the strength of the support under different impact forces, thereby improving the flexibility of the test.

[0017] 3. This device works under the same kinetic energy input for the vibration and impact of the support, and the two are linked. Under the premise of meeting the vibration frequency, the speed of the vibration motor is reduced by setting a reducer to meet the working speed of the impact operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a mining support strength testing device according to the present invention;

[0019] Figure 2 This is a schematic diagram of the impact vibration component and the compression component of a mining support strength testing device according to the present invention. The frame is removed from this diagram.

[0020] Figure 3 This is a schematic diagram of the clutch structure of a mining support strength testing device according to the present invention. The reducer is removed from this diagram.

[0021] Figure 4 This is a schematic diagram of the clutch cross-sectional structure of a support strength testing device for mining according to this utility model.

[0022] In the diagram: 1. Frame; 201. Sliding plate; 202. Vibration motor; 203. Cam; 204. First pulley; 205. Second pulley; 206. Reducer; 207. Belt; 208. Drive rod; 209. First connecting rod; 2091. Arc-shaped slide rail; 210. Second connecting rod; 211. Rocker arm; 212. Hammer; 213. Mounting rod; 214. Slider; 215. Sliding frame; 216. Return spring; 217. Spline rod; 2171. Driven sleeve; 2172. End face tooth; 2173. Annular groove; 2174. Sliding rod; 2175. Mounting ring; 2176. Driven rod; 3. Support; 401. Second clamping plate; 402. First clamping plate; 403. Hydraulic cylinder; 501. Fixed plate; 502. Moving rod; 503. Spring. Detailed Implementation

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

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] like Figure 1-4 As shown, in order to realize the strength testing of the support under various impacts, a mining support strength testing device is proposed, including a frame 1. Two sliding plates 201 are detachably installed in the frame 1 by screws. The two sliding plates 201 can slide in the frame 1. The two sliding plates 201 are arranged in an upper and lower position relationship. A cam 203 is rotatably installed on the lower sliding plate 201, and a vibration motor 202, a reducer 206, an arc-shaped slide rail 2091 and a sliding frame 215 are installed on the upper sliding plate 201. The width of the sliding plate 201 is half the width of the support 3.

[0026] To simulate the impact of impact vibration on support 3, a mining support strength testing device is proposed. The impact vibration component includes: a cam 203 rotatably mounted on a lower sliding plate 201 inside the frame 1, the cam 203 being able to contact and connect with the upper surface of support 3 and cause support 3 to vibrate; a first pulley 204 coaxially fixedly mounted on the cam 203, a belt 207 with the other end connected to a second pulley 205 being sleeved on the first pulley 204; the second pulley 205 being fixedly mounted on the input end of a reducer 206 used to reduce the speed of the drive rod 208, the input end of the reducer 206 being fixedly connected to the output end of the vibration motor 202; the reducer 206 being fixedly mounted on the sliding plate 201, the reducer 206 being able to convert the high speed of the vibration motor 202 into a low speed output; the vibration motor 202 being fixedly mounted on the upper sliding plate 201, the vibration motor 202 providing kinetic energy input to the reducer 206 while driving the second pulley 205 to rotate;

[0027] Powered by the vibration motor 202, the input end of the reducer 206 is driven to rotate. The input end of the reducer 206 drives the second pulley 205 to rotate. The kinetic energy is transmitted to the first pulley 204 via the belt 207, which in turn drives the cam 203 to rotate. Since the cam 203 is in contact with the upper surface of the support 3, the rotation of the cam 203 can simulate the influence of vibration force on the support 3. A rubber pad is provided on the surface of the cam 203. The rubber pad has a certain deformation capacity. When the support 3 bends upward, the rubber pad contacts the support 3 and is squeezed, but the cam 203 can still maintain rotation. By setting the rubber pad, interference between the cam 203 and the support 3 can be avoided when the support 3 undergoes upward deformation.

[0028] like Figure 3 , 4 As shown, the clutch assembly includes: a splined rod 217 whose output end is fixedly connected to the output end of a reducer 206; the splined rod 217 is splinedly connected to a driven sleeve 2171; the driven sleeve 2171 is sleeved on the surface of the splined rod 217; an end face tooth 2172 is provided at the end of the driven sleeve 2171 away from the splined rod 217; an annular groove 2173 is provided on the surface of this end; one end of a sliding rod 2174 is slidably installed in the annular groove 2173; the other end of the sliding rod 2174 is fixedly connected to a mounting ring 2175; a driven rod 2176 is rotatably installed in the mounting ring 2175; an end face tooth corresponding to the driven sleeve 2171 is provided at the end of the driven rod 2176 near the driven sleeve 2171; the end face tooth on the driven rod 2176 can mesh with the end face tooth 2172 on the driven sleeve 2171; and a drive rod 208 is fixedly connected at the end of the driven rod 2176 away from the driven sleeve 2171.

[0029] Two screw holes are provided on the surface of the driven sleeve 2171, corresponding to the engaged and disengaged states of the driven rod 2176 and the driven sleeve 2171, respectively. A screw hole is provided on the sliding rod 2174, corresponding to the screw hole on the driven sleeve 2171.

[0030] When it is necessary to engage the clutch and rotate the driven rod 2176, first unscrew the screw connecting the sliding rod 2174 and the driven sleeve 2171. Then, manually pull the driven sleeve 2171 towards the driven rod 2176 so that the end face teeth 2172 on the driven sleeve 2171 mesh with the driven rod 2176. Then, screw the screw into the screw hole to fix the position of the driven sleeve 2171. At this time, the reducer 206 drives the spline rod 217 to rotate, the spline rod 217 drives the driven sleeve 2171 to rotate, and the rotation of the driven sleeve 2171 synchronously drives the mounting ring 2175 and the driven rod 2176 to rotate. The driven rod 2176 drives the drive rod 208, which is fixedly connected to it, to rotate synchronously.

[0031] When it is necessary to stop the clutch from transmitting kinetic energy and prevent the driven rod 2176 from rotating, the driven sleeve 2171 is moved away from the driven rod 2176, so that the driven sleeve 2171 and the driven rod 2176 are disengaged. At this time, when the driven sleeve 2171 rotates, it can only drive the mounting ring 2175 to rotate. The driven rod 2176 loses kinetic energy input and stops rotating, and the drive rod 208 fixedly connected to it does not rotate.

[0032] Driven rod 2176 is fixedly connected to one end of drive rod 208. The other end of drive rod 208 is hinged to one end of first connecting rod 209. The other end of first connecting rod 209 is hinged to one end of second connecting rod 210. The hinged ends of first connecting rod 209 and second connecting rod 210 are slidably mounted within arc-shaped slide rail 2091. Arc-shaped slide rail 2091 is longitudinally slidably mounted on sliding plate 201. The hinged ends of first connecting rod 209 and second connecting rod 210 can slide along arc-shaped slide rail 2091. The trajectory of arc-shaped slide rail 2091 is the motion trajectory of rocker arm 211 and striking hammer 212. Second connecting rod 210 is hinged to the middle of rocker arm 211, which realizes reciprocating oscillation. The upper end of rocker arm 211 is hinged to mounting rod 213. The end of the mounting rod 213 away from the rocker arm 211 is fixedly mounted on the slider 214. The lower end of the rocker arm 211 is fixedly connected to a striking hammer 212 that can contact the support 3 and reciprocate to strike the upper surface of the support 3. This structure is a crank-rocker structure. When the clutch assembly is closed and drives the driven rod 2176 to rotate, the drive rod 208 rotates. The rotation of the drive rod 208 drives the first connecting rod 209 to slide in the arc-shaped slide rail 2091, thereby driving the rocker arm 211 to make a reciprocating motion with the same trajectory as the arc-shaped slide rail 2091. The rocker arm 211 drives the striking hammer 212 to move synchronously, thereby realizing the reciprocating striking of the support 3 by the striking hammer 212, thus detecting that the support 3 is affected by the vibration force and the striking force at the same time.

[0033] When the support 3 is subjected to compressive force and bends upward, the stroke of the rocker arm 211 will be affected. In order to avoid the rocker arm 211 from interfering due to the above influence, a support strength testing device for mining is proposed. The slider 214 is longitudinally slidably installed in the sliding frame 215. The slider 214 can slide along the extension direction of the sliding frame 215. One end of the reset spring 216 for resetting the slider 214 is fixedly connected in the sliding frame 215. The other end of the reset spring 216 is fixedly connected to the slider 214. The arc-shaped slide rail 2091 is fixedly connected to the mounting rod 213.

[0034] When the support 3 bends upward under lateral pressure, the downward swing stroke of the hammer 212 when it contacts the upper surface of the support 3 is shorter than the initial stroke. Since the reciprocating swing stroke of the hammer 212 is fixed, when the hammer 212 contacts the bent upper surface of the support 3, it will be resisted by the bent support 3 and reacted to the slider 214 through the mounting rod 213. This will cause the slider 214 to slide upward in the sliding frame 215. The return spring 216 above it will be compressed by force, and the mounting rod 213 will slide upward synchronously. The arc-shaped slide rail 2091 is slidably installed on the sliding plate 201 and fixedly connected to the mounting rod 213. Therefore, the arc-shaped slide rail 2091 also moves upward synchronously with the mounting rod 213.

[0035] To achieve compression of the side of the support 3, a mining support strength testing device is proposed. The compression assembly includes: a hydraulic cylinder 403 fixedly installed in the frame 1, the output end of which is fixedly connected to the middle of the first clamping plate 402. The first clamping plate 402 can be clamped to one end of the support 3. The first clamping plate 402 is slidably installed in the frame 1. The other end of the support 3 is clamped in the second clamping plate 401. The second clamping plate 401 is fixedly installed in the frame 1. Limiting blocks that limit the bending direction of the support 3 are provided on the first clamping plate 402 and the second clamping plate 401 to ensure that the support 3 can bend upward.

[0036] When the hydraulic cylinder 403 is working, it can push the first clamping plate 402 to slide closer to the second clamping plate 401. The first clamping plate 402 applies thrust to the side of the support 3, thereby squeezing the support 3 and causing the support 3 to bend upward.

[0037] To enable the testing of support 3, a mining support strength testing device is proposed. A fixed plate 501 is fixedly installed inside the frame 1. Seven sliding grooves are equidistantly arranged on the fixed plate 501. A movable rod 502 is slidably installed in each groove. The upper end of the movable rod 502 abuts against the lower surface of the support 3. One end of a spring 503 that enables the movable rod 502 to return to its original position is fixedly connected to the movable rod 502. The other end of the spring 503 is fixedly connected to the fixed plate 501. The spring 503 is in a semi-compressed state in the initial state. The surface of the movable rod 502 is marked with graduations.

[0038] When the support 3 bends upward under the compressive force of the hydraulic cylinder 403, the resistance component of the lower surface of the support 3 to the moving rod 502 decreases, the resistance of the spring 503 decreases and it gradually returns to its original position. The spring 503 drives the moving rod 502 to move upward. The inspector can judge the strength of the support 3 based on the change of the scale on the moving rod 502.

[0039] Working principle:

[0040] First, the support 3 is snapped into the first clamping plate 402 and the second clamping plate 401, so that the upper end of the moving rod 502 contacts the lower end of the support 3.

[0041] Then turn on the switch of hydraulic cylinder 403. When hydraulic cylinder 403 is working, it can push the first clamping plate 402 to slide closer to the second clamping plate 401. The first clamping plate 402 applies thrust to the side of the support 3, thereby squeezing the support 3 and causing the support 3 to bend upward, simulating the effect of the support 3 being squeezed.

[0042] While opening the hydraulic cylinder 403, the vibration motor 202 is also turned on. Powered by the vibration motor 202, the input end of the reducer 206 is rotated. The input end of the reducer 206 drives the second pulley 205 to rotate. Kinetic energy is transmitted to the first pulley 204 via the belt 207, which in turn drives the cam 203 to rotate. Since the cam 203 is in contact with the upper surface of the support 3, the rotation of the cam 203 can simulate the effect of vibration on the support 3.

[0043] While the vibration motor 202 drives the cam 203 to rotate, the input end of the reducer 206 operates. The reducer 206 operates and reduces its speed, adjusting the clutch assembly and thus adjusting the working state of the drive rod 208. The driven sleeve 2171 is pulled closer to the driven rod 2176, so that the end face teeth 2172 on the driven sleeve 2171 mesh with the driven rod 2176. Then, screws are screwed into the screw hole to fix the position of the driven sleeve 2171. At this time, the reducer 206 drives the spline rod 217 to rotate, the spline rod 217 drives the driven sleeve 2171 to rotate, and the rotation of the driven sleeve 2171 synchronously drives the mounting ring 2175 and the driven rod 2176 to rotate. The driven rod 2176 drives the drive rod 208, which is fixedly connected to it, to rotate synchronously.

[0044] Driven rod 2176 drives drive rod 208 to rotate. Drive rod 208 rotates and drives first connecting rod 209 to slide within arc-shaped slide rail 2091. This causes rocker arm 211 to perform reciprocating motion along the same trajectory as arc-shaped slide rail 2091. Rocker arm 211 drives hammer 212 to move synchronously, thereby enabling hammer 212 to reciprocate and strike support 3. This allows the support 3 to be affected by both vibration and impact force.

[0045] When the support 3 bends upward under the pressure of the side hydraulic cylinder 403, the downward swing stroke of the hammer 212 when it contacts the upper surface of the support 3 is shorter than the initial stroke. Since the reciprocating swing stroke of the hammer 212 is fixed, when the hammer 212 contacts the bent upper surface of the support 3, it will be resisted by the bent support 3 and reacted to the slider 214 through the mounting rod 213. This will cause the slider 214 to slide upward in the sliding frame 215, and the return spring 216 above it will be compressed. The mounting rod 213 will slide upward synchronously, and the arc-shaped slide rail 2091 will also move upward synchronously with the mounting rod 213.

[0046] If the impact on the support strength is not detected, the driven sleeve 2171 is moved away from the driven rod 2176, so that the driven sleeve 2171 and the driven rod 2176 are disengaged. At this time, when the driven sleeve 2171 rotates, it can only drive the mounting ring 2175 to rotate. The driven rod 2176 loses kinetic energy input and stops rotating. The drive rod 208 fixedly connected to it does not rotate, and the components connected to the drive rod 208 do not operate.

[0047] When the support 3 is bent upward by the extrusion force of the hydraulic cylinder 403 alone, the resistance component of the lower surface of the support 3 to the moving rod 502 decreases, the resistance of the spring 503 decreases and it gradually returns to its original position. The spring 503 drives the moving rod 502 to move upward. The inspector can judge the strength of the support 3 by the change of the scale on the moving rod 502.

[0048] When the support 3 is subjected to both vibration and impact forces, or to vibration alone, the support 3 may bend downwards. The resistance component of the lower surface of the support 3 to the moving rod 502 increases, the resistance of the spring 503 increases and it gradually compresses. The moving rod 502 also gradually moves downwards due to the resistance. The inspector can judge the strength of the support 3 based on the change of the scale on the moving rod 502.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A support strength testing device for mining, comprising a frame (1), characterized in that: It also includes a percussion vibration component and a compression component: The impact vibration assembly includes: a cam (203) and a hammer (212). The cam (203) is rotatably mounted in the frame (1). The cam (203) can contact and connect with the upper surface of the support (3) and cause the support (3) to vibrate. The cam (203) is coaxially fixedly mounted with a first pulley (204). A belt (207) with the other end of the belt sleeved on the first pulley (204) is sleeved on the second pulley (205). The second pulley (205) is fixedly mounted on the input end of a reducer (206) used to reduce the speed of the drive rod (208). The input end of the reducer (206) is fixedly connected to the output end of the vibration motor (202). The output end of the reducer (206) is fixedly connected to the splined rod (217) of the clutch assembly. The clutch assembly can change the working state of the drive rod (208). The splined rod (217) can engage with the driven rod (2176) inside the clutch. The driven rod (2176) inside the clutch is fixedly connected to one end of the drive rod (208). The other end of the drive rod (208) is hinged to one end of the first connecting rod (209). The other end of the first connecting rod (209) is hinged to one end of the second connecting rod (210). The connecting rod (210) is hinged to the middle of the rocker arm (211) that realizes reciprocating swing. The upper end of the rocker arm (211) is hinged to the mounting rod (213). The mounting rod (213) is fixedly mounted on the slider (214) that can slide up and down. The slider (214) is longitudinally slidably mounted in the sliding frame (215). The slider (214) can slide along the extension direction of the sliding frame (215). The lower end of the rocker arm (211) is fixedly connected to a hammer (212) that can contact the support (3) and reciprocate to strike the support (3). The extrusion assembly includes a hydraulic cylinder (403) and a first clamping plate (402). The hydraulic cylinder (403) is fixedly installed in the frame (1), and its output end is fixedly connected to the middle of the first clamping plate (402). The first clamping plate (402) can be clamped to one end of the support (3). The first clamping plate (402) is slidably installed in the frame (1). The other end of the support (3) is clamped in the second clamping plate (401). The second clamping plate (401) is fixedly installed in the frame (1). A detection assembly for detecting its deformation is provided below the support (3).

2. The mining support strength testing device according to claim 1, characterized in that: The clutch assembly includes: a reducer (206) with its output end fixedly connected to one end of a splined rod (217), the splined rod (217) being splinedly connected to a driven sleeve (2171), the driven sleeve (2171) being sleeved on the surface of the splined rod (217), the end of the driven sleeve (2171) away from the splined rod (217) being provided with end face teeth (2172), the end surface of which is provided with an annular groove (2173), and one end of a sliding rod (2174) being slidably installed in the annular groove (2173). 174) The other end is fixedly connected to the mounting ring (2175). The driven rod (2176) is rotatably installed inside the mounting ring (2175). The end of the driven rod (2176) near the driven sleeve (2171) is provided with end face teeth corresponding to the driven sleeve (2171). The end face teeth on the driven rod (2176) can mesh with the end face teeth (2172) on the driven sleeve (2171). The end of the driven rod (2176) away from the driven sleeve (2171) is fixedly connected to the drive rod (208).

3. The mining support strength testing device according to claim 1, characterized in that: The detection assembly includes: a fixed plate (501) and a moving rod (502). The fixed plate (501) is fixedly installed inside the frame (1). Seven sliding grooves are equidistantly arranged on the fixed plate (501). The moving rod (502) is slidably installed in each sliding groove. The upper end of the moving rod (502) can abut against the lower surface of the support (3). One end of a spring (503) that can make the moving rod (502) reset itself is fixedly connected to the moving rod (502). The other end of the spring (503) is fixedly connected to the fixed plate (501). The surface of the moving rod (502) is provided with a scale.

4. The mining support strength testing device according to claim 1, characterized in that: One end of a reset spring (216) for resetting the slider (214) is fixedly connected inside the sliding frame (215), and the other end of the reset spring (216) is fixedly connected to the slider (214).

5. The mining support strength testing device according to claim 1, characterized in that: Two sliding plates (201) can be detachably installed inside the frame (1). A cam (203), a vibration motor (202), a reducer (206) and a sliding frame (215) are respectively installed on the two sliding plates (201).

6. The mining support strength testing device according to claim 5, characterized in that: The width of the sliding plate (201) is half the width of the support (3).

7. The mining support strength testing device according to claim 6, characterized in that: The connecting ends of the first connecting rod (209) and the second connecting rod (210) are slidably installed in the arc-shaped slide rail (2091). The arc-shaped slide rail (2091) is longitudinally slidably installed on the sliding frame (215). The arc-shaped slide rail (2091) is fixedly connected to the mounting rod (213).

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