Surface grinding treatment device for rock drilling large bit shank machining

Abstract

The invention relates to the technical field of grinding devices, in particular to a surface grinding treatment device for rock drilling large bit shank machining, which comprises a bedplate, and further comprises a three-jaw chuck arranged above the bedplate through a reciprocating driving mechanism, a shell and an end cover fixed above the bedplate and mutually fixed, a plurality of sliding blocks are movably arranged on one side of the end cover, and the sliding blocks are movably arranged on the other side of the end cover. One end of each sliding block is rotationally connected with a grinding wheel, and a feeding mechanism for driving the multiple grinding wheels to be combined synchronously is arranged on the inner side of the shell. The reciprocating mechanism drives the three-jaw chuck and the bit shank to do reciprocating motion, meanwhile, through the feeding mechanism, the multiple grinding wheels can be synchronously combined by a very small distance when the bit shank does reciprocating motion every time, the micro-feeding effect is achieved, multiple spline grooves are ground at the same time, and the grinding efficiency is improved. The grinding machining efficiency is improved, it is guaranteed that the grinding depth of each spline groove is kept consistent, and the machining accuracy of the spline grooves is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding devices, and more particularly to a surface grinding treatment device for processing the large shank end of a rock drill. Background Art

[0002] The shank end is generally of a tubular structure, with a thread provided at one end and a spline provided at the other end. The end with the thread is connected to the drill rod, and the end with the spline is in contact with the bronze bushing of the rock drill, for transmitting the impact energy of the piston, so as to transmit the energy to the drill bit and realize the crushing operation of the rock.

[0003] In order to ensure the assembly accuracy of the shank end in the rock drill and at the same time to ensure the processing efficiency of the shank end, during the processing of the shank end, first rough machining is carried out by equipment such as gear shapers and milling machines to remove most of the surplus, and the general shape and dimensions are machined. Then, by means of the processing method of grinding with a grinding wheel, the spline groove dimensions of the shank end are accurately processed to ensure the fitting accuracy with the bronze bushing of the piston of the rock drill and the drill rod.

[0004] After retrieval, a Chinese patent with the publication number: CN211103050U discloses a grinding processing device for the small diameter of a spline shaft, including a base frame. A plurality of grinding mechanisms are arranged on the base frame in an annular array. The grinding mechanism includes an adjusting plate, a connecting plate and a mounting plate that are parallel to each other. The adjusting plate is fixed on the base frame. Both ends of the adjusting plate are connected to the connecting plate through a distance adjusting mechanism. Both ends of the connecting plate are connected to the mounting plate through an elastic connecting mechanism. A friction strip is fixed on the mounting plate. The friction strip is parallel to the central axis of the spline shaft and is in frictional fit with the surface of the spline shaft. Hydraulic cylinders parallel to the spline shaft are symmetrically arranged on both sides of the base frame. One end of the hydraulic cylinder is fixedly connected with a top block, and the top block abuts against one end face of the spline shaft.

[0005] Based on the above retrieval and combined with practical problems, it is found that although this device can simultaneously grind and process a plurality of spline grooves, improving the processing efficiency, the multiple friction strips for grinding the spline grooves cannot apply the same pressure to each spline groove, and the multiple friction strips cannot achieve equal feed amounts, resulting in inconsistent grinding depths of the multiple spline grooves, reducing the processing accuracy of the shank end, and thus reducing the assembly accuracy of the shank end and the rock drill. Summary of the Invention

[0006] The purpose of the present invention is to provide a surface grinding treatment device for processing the large shank end of a rock drill to solve the problems raised in the above background art.

[0007] The technical solution of the present invention is: a surface grinding treatment device for processing a large drill rod tail of a rock drill, including a table board, and further including: a three-jaw chuck arranged above the table board through a reciprocating driving mechanism, a housing and an end cover fixed above the table board and fixed to each other. One side of the end cover is movably provided with a plurality of sliders, and one end of each slider is rotatably connected to a grinding wheel. An feeding mechanism for driving a plurality of grinding wheels to synchronously merge is arranged inside the housing; the feeding mechanism includes a worm and a worm gear rotatably connected inside the housing and meshing with each other, and a sliding pin rotatably connected to the other end of each slider. A plurality of arc-shaped grooves are formed inside the worm gear, and each sliding pin is movably adapted to the inside of each arc-shaped groove. One end of the worm is provided with a clutch transmission mechanism capable of driving its directional intermittent rotation; the clutch transmission mechanism includes a convex ring that can be separated from and combined with the end of the worm, and a second engaging tooth fixed to the end of the worm. One end of the convex ring is fixed with a first engaging tooth that engages with the second engaging tooth; further included is a detection triggering mechanism for stopping the feeding mechanism when the spline groove reaches a specified depth.

[0008] Preferably, the detection triggering mechanism includes two support platforms arranged on the upper side of the table board. Sleeves are slidably arranged on the upper sides of the two support platforms. Extension rods are slidably inserted into one ends of the two sleeves. Conductive wheel frames are fixed to one ends of the two extension rods. Conductive detection rollers that can conduct electricity are rotatably connected to one ends of the two conductive wheel frames. Further included is a pneumatic transmission mechanism for pushing the convex ring to separate from the worm.

[0009] Preferably, the pneumatic transmission mechanism includes a first piston cylinder fixed to one side outside the housing and a second piston cylinder fixed on the upper side of the table board and concentric with the three-jaw chuck. A first piston plate and a second piston plate are respectively slidably connected inside the first piston cylinder and the second piston cylinder. First piston rods and second piston rods extending to the outside are respectively fixed to one ends of the first piston plate and the second piston plate. The other end of the second piston plate is provided with a piston spring elastically connected to one end inside the second piston cylinder. One end of the first piston rod is fixed with a push plate. A connecting ring rotatably sleeved outside the convex ring is fixed to the upper end of the push plate. One end inside the first piston cylinder is communicated with one end inside the second piston cylinder through an air pipe. A commutation mechanism for adjusting the air flow direction is arranged at the middle position of the air pipe.

[0010] Preferably, the commutation mechanism includes a commutation housing communicated at the middle position of the air pipe. A sliding column is slidably arranged inside the commutation housing, and an exhaust port is opened on one side of the commutation housing. An exhaust flow channel and a communication flow channel are formed inside the sliding column. One end of the sliding column is elastically connected to one end inside the commutation housing through a sliding column spring. An electromagnet for attracting the sliding column is installed at a position of the commutation housing close to the sliding column spring. The two conductive detection rollers are electrically connected to two contacts of a switch in the circuit of the electromagnet.

[0011] Preferably, the clutch transmission mechanism further includes a rotating shaft movably inserted at one end of the worm. The rotating shaft penetrates and is fixed inside the convex ring, and a friction wheel is connected to the outer end of the rotating shaft through a one-way bearing.

[0012] Preferably, chutes are provided inside the end cap corresponding to the positions of each slider. The plurality of sliders are respectively slidably connected to the inner sides of the plurality of chutes, and a grinding motor for driving the grinding wheel to rotate is installed on one side of each slider.

[0013] Preferably, a non-return spring piece is elastically connected to the outer side of the housing at the position of the push plate, and one end of the non-return spring piece is attached to the lower end of the push plate.

[0014] Preferably, a friction plate for pushing the friction wheel to rotate is fixed to one side of the three-jaw chuck.

[0015] Preferably, the reciprocating driving mechanism includes two vertical plates fixed to the upper side of the table board. Two guide rods are fixed between the two vertical plates, and a reciprocating lead screw is rotatably connected between the two vertical plates. A main motor for driving the reciprocating lead screw to rotate is installed on one side of one of the vertical plates. A slide plate is slidably connected to the outer sides of the two guide rods. The reciprocating lead screw is adapted to the slide plate, and the upper side of the slide plate is fixed to the three-jaw chuck.

[0016] Preferably, adjusting screws are threadedly connected to one ends of the two support platforms, and one ends of the two adjusting screws are respectively rotatably connected to one ends of the two sleeves.

[0017] The present invention provides a surface grinding treatment device for the processing of large rock drill shanks through improvement. Compared with the prior art, it has the following improvements and advantages: Firstly: The present invention drives the three-jaw chuck to reciprocate through the reciprocating mechanism. The three-jaw chuck can fix the shank and drive the shank to reciprocate synchronously. And through the housing and the end cap, a central hole concentric with the three-jaw chuck is provided inside the housing and the end cap, so that the three-jaw chuck can drive the shank to reciprocate inside the central hole. At the same time, through the feeding mechanism, multiple grinding wheels therein can synchronously merge a very small distance each time the shank reciprocates once, realizing the function of micro-feeding, realizing the grinding treatment of multiple spline grooves at the same time, not only improving the grinding processing efficiency, but also ensuring that the grinding depth of each spline groove is consistent, improving the processing accuracy of the spline grooves of the shank, and thus improving the assembly accuracy of the shank in the rock drill.

[0018] Secondly, the present invention can measure the depth of the spline groove of the shank each time the shank moves back and forth, that is, each time it is ground, by detecting the trigger mechanism. When the spline groove reaches the specified depth, the pneumatic transmission mechanism can drive the convex ring in the clutch transmission mechanism to separate from the end of the worm, thereby releasing the connection between the two. When the three-jaw chuck continues to move and drives the friction wheel to rotate, the rotational torque will no longer be transmitted to the worm, thereby stopping the feed mechanism and avoiding further grinding of the spline groove of the shank. The grinding depth of the spline groove of each shank is kept consistent, thereby further improving the processing accuracy of the spline groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention from a first perspective; Figure 2 This is a schematic diagram of the structure from a second viewing angle of the present invention; Figure 3 Schematic diagram of the front side cross-sectional structure of the housing in the present invention; Figure 4 Schematic diagram of the rear side cross-sectional structure of the housing in the present invention; Figure 5 It is a partial cross-sectional structural schematic diagram of the present invention; Figure 6 For the present invention Figure 3 Schematic diagram of the enlarged structure at A in the middle; Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure at B in the middle; Figure 8 For the present invention Figure 5 Schematic diagram of the enlarged structure at C in the middle; Figure 9 This is a schematic structural diagram of the three-jaw chuck and the shank close to the housing in the present invention; Figure 10 Schematic diagram of the circuit connection between the electromagnet and the two conductive detection rollers in the present invention.

[0021] Reference numerals: 1. Table board; 2. Three-jaw chuck; 3. Housing; 4. End cover; 5. Slide groove; 6. Slide block; 7. Grinding wheel; 8. Worm; 9. Worm gear; 10. Arc groove; 11. Slide pin; 12. Grinding motor; 13. Anti-rebound piece; 14. Friction plate; 101. Main motor; 102. Reciprocating lead screw; 103. Slide plate; 104. Guide rod; 105. Vertical plate; 201. Convex ring; 202. First engaging tooth; 203. Second engaging tooth; 204. Rotating shaft; 205. Friction wheel; 206. One-way bearing; 301. Support platform; 302. Sleeve; 303. Extension rod; 304. Wheel frame; 305. Conductive detection roller; 306. Pressing spring; 307. Adjusting screw; 401. First piston cylinder; 402. First piston rod; 403. First piston plate; 404. Push plate; 405. Second piston cylinder; 406. Second piston rod; 407. Second piston plate; 408. Piston spring; 409. Air pipe; 501. Reversing housing; 502. Slide column; 503. Exhaust port; 504. Exhaust flow channel; 505. Connecting flow channel; 506. Slide column spring; 507. Electromagnet. Detailed implementation manners

[0022] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] The present invention provides a surface grinding treatment device for processing the large shank end of a rock drill through improvement. The technical solution of the present invention is as follows: As Figures 1 to 10As shown in the figure, an embodiment of the present invention provides a surface grinding treatment device for processing a large drill rod tail of a rock drill, including a table board 1, and further including: a three-jaw chuck 2 arranged above the table board 1 through a reciprocating driving mechanism, a housing 3 and an end cover 4 fixed above the table board 1 and fixed to each other. A plurality of sliders 6 are movably arranged on one side of the end cover 4. One end of each slider 6 is rotatably connected to a grinding wheel 7. A chute 5 is provided inside the end cover 4 at a position corresponding to each slider 6. The plurality of sliders 6 are respectively slidably connected to the inner sides of the plurality of chutes 5. A grinding motor 12 for driving the grinding wheel 7 to rotate is installed on one side of each slider 6. A feeding mechanism for driving the plurality of grinding wheels 7 to merge synchronously is arranged inside the housing 3; the feeding mechanism includes a worm 8 and a worm gear 9 rotatably connected inside the housing 3 and meshing with each other, and a sliding pin 11 rotatably connected to the other end of each slider 6. A plurality of arc-shaped grooves 10 are provided inside the worm gear 9. Each sliding pin 11 is respectively movably adapted to the inner side of each arc-shaped groove 10. One end of the worm 8 is provided with a clutch transmission mechanism for driving its directional intermittent rotation; the clutch transmission mechanism includes a convex ring 201 that can be separated from and combined with the end of the worm 8, a second engaging tooth 203 fixed to the end of the worm 8. A first engaging tooth 202 that engages with the second engaging tooth 203 is fixed to one end of the convex ring 201. The clutch transmission mechanism further includes a rotating shaft 204 movably inserted into one end of the worm 8. The rotating shaft 204 passes through and is fixed inside the convex ring 201, and a friction wheel 205 is connected to the outer end of the rotating shaft 204 through a one-way bearing 206; a detection triggering mechanism for stopping the feeding mechanism when the spline groove reaches a specified depth is further included.

[0024] Further, the detection triggering mechanism includes two support platforms 301 arranged on the upper side of the table board 1. Sleeves 302 are slidably arranged on the upper sides of the two support platforms 301. An extension rod 303 is slidably inserted into one end of each of the two sleeves 302. A conductive wheel frame 304 is fixed to one end of each of the two extension rods 303. A conductive detection roller 305 that can conduct electricity is rotatably connected to one end of each of the two wheel frames 304. A pneumatic transmission mechanism for pushing the convex ring 201 to separate from the worm 8 is further included; The depth of the spline groove can be detected through the detection triggering mechanism. When the depth of the spline groove reaches a specified value, the feeding mechanism can be stopped from moving, so as to stop the combined movement of the plurality of grinding wheels 7, so that the plurality of grinding wheels 7 no longer grind the spline groove continuously, ensuring that the grinding depth of each spline groove remains consistent and improving the processing accuracy of the spline groove of the drill rod tail.

[0025] Furthermore, the pneumatic transmission mechanism includes a first piston cylinder 401 fixed to one side of the outside of the housing 3 and a second piston cylinder 405 fixed to the upper side of the platen 1 and concentric with the three-jaw chuck 2. A first piston plate 403 and a second piston plate 407 are slidably connected to the inner sides of the first piston cylinder 401 and the second piston cylinder 405 respectively. One ends of the first piston plate 403 and the second piston plate 407 are respectively fixed with first piston rods 402 and second piston rods 406 extending to the outside. The other end of the second piston plate 407 is provided with a piston spring 408 elastically connected to one end of the inner side of the second piston cylinder 405. One end of the first piston rod 402 is fixed with a push plate 404. The upper end of the push plate 404 is fixed with a connecting ring rotatably sleeved on the outside of the convex ring 201. One end of the inner side of the first piston cylinder 401 is communicated with one end of the inner side of the second piston cylinder 405 through an air pipe 409. A reversing mechanism for adjusting the air flow direction is arranged at the middle position of the air pipe 409; Through the pneumatic transmission mechanism, when the depth of the spline groove reaches the specified depth, it can drive the separation of the convex ring 201 and one end of the worm 8 in the clutch transmission mechanism, so that the feeding mechanism can stop operating, the multiple grinding wheels 7 can stop merging, and further grinding of the depth of the spline groove can be stopped, ensuring the depth consistency of the spline grooves of each shank.

[0026] Furthermore, the reversing mechanism includes a reversing housing 501 communicatively arranged at the middle position of the air pipe 409. A sliding column 502 is slidably arranged inside the reversing housing 501. An exhaust port 503 is opened on one side of the reversing housing 501. An exhaust flow channel 504 and a communication flow channel 505 are opened inside the sliding column 502. One end of the sliding column 502 is elastically connected to one end of the inner side of the reversing housing 501 through a sliding column spring 506. An electromagnet 507 for attracting the sliding column 502 is installed at a position of the reversing housing 501 close to one end of the sliding column spring 506. Two conductive detection rollers 305 are electrically connected to two contacts of the switch in the circuit of the electromagnet 507; When the exhaust flow channel 504 in the reversing mechanism is communicated with the air pipe 409, the air inside the second piston cylinder 405 will not move towards the inside of the first piston cylinder 401 at this time. When the communication flow channel 505 in the air changing mechanism is communicated with the air pipe 409, the air inside the second piston cylinder 405 can move towards the inside of the first piston cylinder 401, so that the convex ring 201 can be separated from one end of the worm 8.

[0027] [[ID=IO]]Furthermore, an anti-rebound sheet 13 is elastically connected to the outside of the housing 3 at the position of the push plate 404. One end of the anti-rebound sheet 13 is attached to the lower end of the push plate 404; When the first piston rod 402 extends to push the push plate 404 to move, the lower end of the push plate 404 slides along the upper surface of the anti-rebound piece 13. When the lower end of the push plate 404 moves to the end of the anti-rebound piece 13, the anti-rebound piece 13 rebounds from the bent state to a straight state under the action of elastic force. At this time, the end of the straight anti-rebound piece 13 can block one side of the push plate 404, preventing the push plate 404 from moving in the reverse direction, thereby preventing the first piston rod 402 and the first piston plate 403 from moving in the reverse direction. Before machining the next drill tail, after bending the end of the anti-rebound piece 13 downward, push the push plate 404 to retract the first piston rod 402 back into the inner side of the first piston cylinder 401, which is convenient for performing the same grinding process on the next drill tail.

[0028] It should be noted that a friction plate 14 for pushing the friction wheel 205 to rotate is fixed on one side of the three-jaw chuck 2.

[0029] Furthermore, the reciprocating driving mechanism includes two vertical plates 105 fixed on the upper side of the table board 1. Two guide rods 104 are fixed between the two vertical plates 105, and a reciprocating lead screw 102 is rotatably connected between the two vertical plates 105. A main motor 101 for driving the reciprocating lead screw 102 to rotate is installed on one side of one of the vertical plates 105. A slide plate 103 is slidably connected to the outer sides of the two guide rods 104. The reciprocating lead screw 102 is adapted to the slide plate 103, and the upper side of the slide plate 103 is fixed to the three-jaw chuck 2; During operation, the main motor 101 of the reciprocating driving mechanism runs to drive the reciprocating lead screw 102 to rotate. When the reciprocating lead screw 102 rotates, it is adapted to the slide plate 103, which can drive the slide plate 103 to move back and forth in a straight line. The slide plate 103 drives the three-jaw chuck 2 to move back and forth in a straight line, and the three-jaw chuck 2 drives the drill tail to move back and forth in a straight line, so that the spline end of the drill tail moves back and forth inside the central holes of the housing 3 and the end cover 4, so that multiple grinding wheels 7 can move back and forth relative to the spline end of the drill tail. At the same time, multiple grinding motors 12 run to drive multiple grinding wheels 7 to rotate respectively, and multiple grinding wheels 7 rotate to grind each spline groove respectively.

[0030] Refer to Figure 7 , one end of each of the two support platforms 301 is threadedly connected with an adjusting screw 307, and one end of each of the two adjusting screws 307 is rotatably connected to one end of each of the two sleeves 302; When it is necessary to make the detection trigger mechanism detect spline grooves of different depths, rotate the adjusting screw 307. The adjusting screw 307 drives the sleeve 302 to slide on the upper side of the support platform 301 through the thread, so that the distance between the conductive detection roller 305 and the drill tail can be adjusted. If it is necessary to machine a shallower spline groove, the conductive detection roller 305 can be adjusted to be close to the drill tail. If it is necessary to machine a deeper spline groove, the conductive detection roller 305 can be adjusted to be far away from the drill tail.

[0031] Working principle: When in use, the shank of the drill bit that needs to be processed with spline grooves passes through the inside of the three-jaw chuck 2, and the shank of the drill bit is fixed by the three-jaw chuck 2. There are central holes concentric with the three-jaw chuck 2 inside the housing 3 and the end cover 4. The shank of the drill bit can pass through the central holes inside the housing 3 and the end cover 4, as Figure 2 shown. When running, the main motor 101 of the reciprocating drive mechanism runs to drive the reciprocating lead screw 102 to rotate. When the reciprocating lead screw 102 rotates, it is adapted to the slide plate 103 and can drive the slide plate 103 to move linearly back and forth. The slide plate 103 drives the three-jaw chuck 2 to move linearly back and forth, and the three-jaw chuck 2 drives the shank of the drill bit to move linearly back and forth, so that the spline end of the shank of the drill bit moves back and forth inside the central holes of the housing 3 and the end cover 4, so that multiple grinding wheels 7 can move back and forth relative to the spline end of the shank of the drill bit. At the same time, multiple grinding motors 12 run to drive multiple grinding wheels 7 to rotate respectively, and multiple grinding wheels 7 rotate to grind each spline groove respectively; When the three-jaw chuck 2 approaches the housing 3 each time, the friction plate 14 on one side of the three-jaw chuck 2 will contact the outside of the friction wheel 205 of the clutch transmission mechanism, thereby driving the friction wheel 205 to rotate counterclockwise by a certain angle, as Figure 6 shown. Since the friction wheel 205 is connected to the rotating shaft 204 through a one-way bearing 206, the friction wheel 205 can drive the rotating shaft 204 to rotate counterclockwise when it rotates counterclockwise, and the friction wheel 205 will not drive the rotating shaft 204 to rotate clockwise when it rotates clockwise. When the friction wheel 205 drives the rotating shaft 204 to rotate counterclockwise, the rotating shaft 204 drives the convex ring 201 on its outside to rotate counterclockwise. Since the first engaging teeth 202 at one end of the convex ring 201 are engaged with the second engaging teeth 203 at one end of the worm 8, the convex ring 201 can drive the worm 8 to rotate counterclockwise. The worm 8 rotates counterclockwise to drive the worm gear 9 to rotate by a certain angle. The worm gear 9 drives multiple arc-shaped grooves 10 inside it to rotate by a certain angle. The multiple arc-shaped grooves 10 are respectively movably adapted to multiple sliding pins 11. Therefore, when the multiple arc-shaped grooves 10 rotate, they can drive multiple sliders 6 to merge synchronously through the sliding pins 11 respectively. The multiple sliders 6 respectively move a certain distance along the inner sides of the multiple sliding grooves 5, and the multiple sliders 6 respectively drive the multiple grinding wheels 7 to merge synchronously, so as to realize the function of synchronous feeding of the multiple grinding wheels 7. Every time the shank of the drill bit reciprocates, the multiple grinding wheels 7 can merge a certain distance, so as to further grind the depth of the spline groove, realizing the grinding process of multiple spline grooves at the same time, not only improving the grinding processing efficiency, but also ensuring that the grinding depth of each spline groove is consistent, improving the processing accuracy of the spline groove of the shank of the drill bit, and facilitating the disassembly and assembly of the shank of the drill bit; In order to ensure the machining accuracy of the depths of multiple spline grooves, by setting a detection trigger mechanism, the depth of the spline groove can be detected. When the depth of the spline groove reaches a specified value, the feeding mechanism can be stopped, so as to stop the combined movement of multiple grinding wheels 7, so that the multiple grinding wheels 7 no longer grind the spline groove continuously, ensuring that the grinding depth of each spline groove remains consistent, and further improving the machining accuracy of the spline groove of the drill tail; In specific work, if the depth of the spline groove does not reach the specified depth, every time the drill tail is driven by the three-jaw chuck 2 to approach the housing 3, the spline groove at the spline end of the drill tail will contact the two conductive detection rollers 305 of the detection trigger mechanism. Since the two conductive detection rollers 305 and the two wheel frames 304 are both conductive, and it should be noted that the two wheel frames 304 are respectively electrically connected to the two contacts of the switch in the circuit of the electromagnet 507 in the commutation mechanism, and the power supply, switch and electromagnet 507 in the circuit are connected in series, as Figure 10 shown in the circuit schematic diagram. Therefore, when the two conductive detection rollers 305 are both in contact with the spline groove of the drill tail, the two conductive detection rollers 305 can be electrically connected through the drill tail body. Therefore, the two wheel frames 304 are electrically connected through the drill tail body. Therefore, the two contacts of the switch in the circuit of the electromagnet 507 are also electrically connected through the drill tail body, so that the circuit of the electromagnet 507 is turned on, and the electromagnet 507 is energized to generate an electromagnetic attraction force on the sliding column 502. After being subjected to the electromagnetic attraction force, the sliding column 502 moves towards the end where the electromagnet 507 is located and compresses the sliding column spring 506. The sliding column 502 simultaneously drives the exhaust passage 504 and the communication passage ⑤ to move, so that one end of the exhaust passage 504 is aligned with the air pipe 409, and the other end of the exhaust passage 504 is aligned with the exhaust port 503. At this time, the inner end of the second piston cylinder 405 is communicated with the outside through the air pipe 409 and the exhaust passage 504. When the drill tail moves, it will push the second piston rod 406 of the pneumatic transmission mechanism, so that the second piston rod 406 drives the second piston plate 407 to move inside the second piston cylinder 405. The second piston plate 407 compresses the piston spring 408, and at the same time presses the air at the inner end of the second piston cylinder 405 into the air pipe 409, then presses it into the exhaust passage 504 through one end of the air pipe 409, and finally discharges it out through the exhaust port 503. At this time, the air at the inner end of the exhaust passage 504 cannot be transported to the inner end of the first piston cylinder 401 through the air pipe 409, so it will not push the first piston rod 402 to extend, and thus will not drive the push plate 404 and the convex ring 201 to move. Therefore, at this time, the convex ring 201 and the worm 8 are still in a combined state; One end of the wheel frame 304 is elastically connected to one end of the sleeve 302 through a pressing spring 306. The pressing spring 306 always applies a pressure to the wheel frame 304 and the conductive detection roller 305, so that the conductive detection roller 305 can closely adhere to the surface of the spline groove of the drill tail, ensuring the stability of current transmission.

[0032] After the spline groove of the drill steel shank reaches a certain depth after multiple reciprocating grinding operations, the two conductive detection rollers 305 will not contact the spline groove. Therefore, the two conductive detection rollers 305 cannot be electrically connected through the drill steel shank body at this time, and thus the circuit of the electromagnet 507 will not be turned on. Then, the sliding column 502 in the commutation mechanism is reset under the elastic force of the sliding column spring 506, aligning and connecting the two ends of the communication flow channel 505 with the air pipe 409. At this time, when the drill steel shank pushes the second piston rod 406 of the pneumatic transmission mechanism, the air at one end inside the second piston cylinder 405 can be pressed into one end inside the first piston cylinder 401 through the air pipe 409 and the communication flow channel 505, thereby pushing the first piston rod 402 to extend, pushing the push plate 404 and the convex ring 201 to move. The convex ring 201 separates from one end of the worm 8, so that the first engaging tooth 202 and the second engaging tooth 203 are separated. At this time, the torque of rotation of the rotating shaft 204 and the convex ring 201 will not be transmitted to the worm 8. Therefore, when the three-jaw chuck 2 and the drill steel shank continue to reciprocate, they will no longer drive the worm 8 of the feeding mechanism to rotate, and thus will not drive the multiple grinding wheels 7 to merge again, thereby stopping the grinding of the spline groove of the drill steel shank and ensuring the consistency of the grinding depth of the spline groove of each drill steel shank. When the first piston rod 402 extends to push the push plate 404 to move, the lower end of the push plate 404 slides along the upper surface of the anti-rebound piece 13. When the lower end of the push plate 404 moves to the end of the anti-rebound piece 13, the anti-rebound piece 13 rebounds from the bent state to a straight state under the elastic force. At this time, the end of the straight anti-rebound piece 13 can block one side of the push plate 404, preventing the push plate 404 from moving in the reverse direction, and thus preventing the first piston rod 402 and the first piston plate 403 from moving in the reverse direction. Before processing the next drill steel shank, after bending the end of the anti-rebound piece 13 downward, push the push plate 404 to retract the first piston rod 402 back into the first piston cylinder 401 again, and then manually rotate the worm 8 in the reverse direction, thereby driving the worm gear 9 to rotate in the reverse direction, so that the multiple merged grinding wheels 7 are separated again, facilitating the same grinding operation on the next drill steel shank.

[0033] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A surface grinding treatment device for processing a large drill rod tail of a rock drill, including a table board, characterized in that, It further includes: A three-jaw chuck arranged above the platen through a reciprocating drive mechanism, a housing and an end cover fixed above the platen and fixed to each other. A plurality of sliders are movably arranged on one side of the end cover. One end of each slider is rotatably connected to a grinding wheel. A feeding mechanism for driving a plurality of grinding wheels to synchronously combine is arranged inside the housing; The feeding mechanism includes a worm and a worm gear rotatably connected inside the housing and meshing with each other, and a sliding pin rotatably connected to the other end of each slider. A plurality of arc-shaped grooves are formed inside the worm gear. Each sliding pin is movably adapted to the inside of each arc-shaped groove. One end of the worm is provided with a clutch transmission mechanism capable of driving its directional intermittent rotation; The clutch transmission mechanism includes a convex ring that can be separated from and combined with the end of the worm, a second engaging tooth fixed to the end of the worm, and a first engaging tooth fixed to one end of the convex ring and engaging with the second engaging tooth; It further includes a detection triggering mechanism for stopping the feeding mechanism when the spline groove reaches a specified depth; The detection triggering mechanism includes two support platforms arranged on the upper side of the platen. Sleeves are slidably arranged on the upper sides of the two support platforms. Extension rods are slidably inserted into one end of each of the two sleeves. A conductive wheel frame is fixed to one end of each of the two extension rods. A conductive detection roller that can conduct electricity is rotatably connected to one end of each of the two wheel frames. It also includes a pneumatic transmission mechanism for pushing the convex ring to separate from the worm.

2. The surface grinding treatment device for processing the large drill rod tail of a rock drill according to claim 1, characterized in that: The pneumatic transmission mechanism includes a first piston cylinder fixed to the outside of one side of the housing and a second piston cylinder fixed to the upper side of the platen and concentric with the three-jaw chuck. A first piston plate and a second piston plate are slidably connected to the inside of the first piston cylinder and the second piston cylinder respectively. A first piston rod and a second piston rod extending to the outside are fixed to one end of the first piston plate and the second piston plate respectively. The other end of the second piston plate is provided with a piston spring elastically connected to one end of the inside of the second piston cylinder. A push plate is fixed to one end of the first piston rod. A connecting ring rotatably sleeved on the outside of the convex ring is fixed to the upper end of the push plate. One end of the inside of the first piston cylinder is communicated with one end of the inside of the second piston cylinder through an air pipe. A commutation mechanism for adjusting the air flow direction is arranged at the middle position of the air pipe.

3. The surface grinding treatment device for the processing of the large drill rod shank according to claim 2, wherein: The commutation mechanism includes a commutation housing communicated at the middle position of the air pipe. A sliding column is slidably arranged inside the commutation housing. An exhaust port is formed on one side of the commutation housing. An exhaust flow channel and a communication flow channel are formed inside the sliding column. One end of the sliding column is elastically connected to one end of the inside of the commutation housing through a sliding column spring. An electromagnet for attracting the sliding column is installed at a position of the commutation housing close to the sliding column spring. The two conductive detection rollers are electrically connected to two contacts of a switch in the circuit of the electromagnet.

4. The surface grinding treatment device for processing the large drill rod tail of a rock drill according to claim 1, characterized in that: The clutch transmission mechanism further includes a rotating shaft movably inserted into one end of the worm. The rotating shaft penetrates and is fixed inside the convex ring, and a friction wheel is connected to the outside end of the rotating shaft through a one-way bearing.

5. The surface grinding treatment device for processing the large drill rod tail of a rock drill according to claim 1, characterized in that: Chute grooves are formed inside the end cover corresponding to the positions of each slider. A plurality of sliders are respectively slidably connected to the inside of the plurality of chute grooves. A grinding motor for driving the grinding wheel to rotate is installed on one side of each slider.

6. The surface grinding treatment device for processing the large drill rod shank of a rock drill according to claim 2, characterized in that: An anti-rebound sheet is elastically connected to the outside of the housing at the position of the push plate. One end of the anti-rebound sheet is attached to the lower end of the push plate.

7. The surface grinding treatment device for processing the large drill rod tail of a rock drill according to claim 4, characterized in that: A friction plate for pushing the friction wheel to rotate is fixed to one side of the three-jaw chuck.

8. The surface grinding treatment device for the processing of the large drill rod shank according to claim 1, wherein: The reciprocating drive mechanism includes two vertical plates fixed to the upper side of the platen. Two guide rods are fixed between the two vertical plates, and a reciprocating lead screw is rotatably connected between the two vertical plates. A main motor for driving the reciprocating lead screw to rotate is installed on one side of one of the vertical plates. A slide plate is slidably connected to the outer sides of the two guide rods. The reciprocating lead screw is adapted to the slide plate, and the upper side of the slide plate is fixed to the three-jaw chuck.

9. The surface grinding treatment device for processing the large drill rod tail of a rock drill according to claim 1, characterized in that: One end of each of the two support platforms is threadedly connected with an adjusting screw rod, and one end of each of the two adjusting screw rods is rotatably connected to one end of each of the two sleeves.

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