A surface grinding device for processing large rock drilling tails

Abstract

The present invention relates to the technical field of grinding devices, and in particular to a surface grinding device for processing large rock drilling shank ends, comprising a table, and further comprising: a three-jaw chuck arranged above the table via a reciprocating drive mechanism, a shell and an end cover fixed above the table and fixed to each other, a plurality of sliders movably provided on one side of the end cover, one end of each slider being rotatably connected to a grinding wheel, and a feed mechanism for driving the plurality of grinding wheels to be synchronously merged is provided on the inner side of the shell. The present invention drives the three-jaw chuck and the shank end to reciprocate through the reciprocating mechanism, and at the same time, through the feed mechanism, the plurality of grinding wheels therein can be synchronously merged by a small distance each time the shank end reciprocates once, thereby achieving the effect of micro-feeding, and realizing the grinding of a plurality of spline grooves at the same time, which not only improves the grinding efficiency, but also ensures that the grinding depth of each spline groove remains consistent, thereby improving the processing accuracy of the spline grooves.

Description

Technical Field

[0001] The invention relates to the technical field of grinding devices, in particular to a surface grinding device for processing large rock drilling shank. Background Art

[0002] The drill tail is generally a tubular structure with a thread on one end and a spline on the other end. The threaded end is connected to the drill rod, and the splined end is in contact with the copper sleeve of the rock drill. It is used to transfer the impact energy of the piston, thereby transferring the energy to the drill bit to achieve rock crushing operation.

[0003] In order to ensure the assembly accuracy of the shank in the rock drill and to ensure the processing efficiency of the shank, the shank is firstly rough-machined by gear shaping machines, milling machines and other equipment to remove most of the excess and process the approximate shape and size. Then, the spline groove size of the shank is precisely machined by grinding with a grinding wheel to ensure the matching accuracy with the rock drill piston copper sleeve and the drill rod.

[0004] After searching, the Chinese patent with publication number: CN211103050U discloses a small-diameter grinding processing device for a spline shaft, including a base frame, on which a plurality of grinding mechanisms in an annular array are provided, the grinding mechanisms including an adjustment plate, a connecting plate and a mounting plate parallel to each other, the adjustment plate being fixed on the base frame, the two ends of the adjustment plate being connected to the connecting plate through a distance adjustment mechanism, the two ends of the connecting plate being connected to the mounting plate through an elastic connection mechanism, the mounting plate being fixed with a friction strip, the friction strip being parallel to the central axis of the spline shaft and frictionally matched with the surface of the spline shaft, hydraulic cylinders parallel to the spline shaft are symmetrically provided on both sides of the base frame, one end of the hydraulic cylinder is fixedly connected to a top block, and the top block is against one end face of the spline shaft.

[0005] Based on the above search and combined with actual problems, it was found that although the equipment can grind multiple spline grooves at the same time, thereby 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 rates, resulting in inconsistent grinding depths of multiple spline grooves, reducing the processing accuracy of the drill tail, and thus reducing the assembly accuracy of the drill tail and the rock drill. Summary of the Invention

[0006] The object of the present invention is to provide a surface grinding device for processing a large rock drilling shank, so as to solve the problems raised in the above-mentioned background technology.

[0007] The technical solution of the present invention is: a surface grinding device for processing large rock drilling tails, comprising a table, further comprising: a three-jaw chuck arranged above the table via a reciprocating drive mechanism, a housing fixed above the table and fixed to each other, a plurality of sliders movably provided on one side of the end cap, one end of each slider being rotatably connected to a grinding wheel, and a feed mechanism provided inside the housing for driving the plurality of grinding wheels to be synchronously combined; the feed mechanism comprising a worm and a worm wheel rotatably connected to the inside of the housing and meshing with each other, and a sliding pin rotatably connected to the other end of each slider, the worm wheel having a plurality of arcuate grooves defined therein, each sliding pin movably adapted to the inner side of each arcuate groove, a clutch transmission mechanism provided at one end of the worm for driving the worm to rotate intermittently in a directional manner; the clutch transmission mechanism comprising a convex ring capable of separating and engaging with the end of the worm, a second engaging tooth fixed to the end of the worm, a first engaging tooth fixed to one end of the convex ring engaging with the second engaging tooth; and a detection trigger mechanism for stopping the feed mechanism when the spline groove reaches a specified depth.

[0008] Preferably, the detection trigger mechanism includes two support platforms arranged on the upper side of the table, sleeves are slidably arranged on the upper sides of the two support platforms, extension rods are slidably inserted at one end of the two sleeves, conductive wheel frames are fixed at one end of the two extension rods, conductive detection rollers are rotatably connected at one end of the two wheel frames, and also includes a pneumatic transmission mechanism for pushing the convex ring to separate from the worm gear.

[0009] Preferably, the pneumatic transmission mechanism includes a first piston cylinder fixed on one side of the outer side of the shell and a second piston cylinder fixed on the upper side of the table and concentric with the three-jaw chuck, the inner sides of the first piston cylinder and the second piston cylinder are respectively slidably connected with the first piston plate and the second piston plate, one end of the first piston plate and the second piston plate are respectively fixed with the first piston rod and the second piston rod extending to the outside, the other end of the second piston plate is provided with a piston spring elastically connected to the inner end of the second piston cylinder, one end of the first piston rod is fixed with a push plate, the upper end of the push plate is fixed with a connecting ring rotatably sleeved on the outside of the convex ring, the inner end of the first piston cylinder is connected to the inner end of the second piston cylinder through an air pipe, and a reversing mechanism for adjusting the direction of airflow is provided at the middle position of the air pipe.

[0010] Preferably, the reversing mechanism includes a reversing shell connected to the middle section of the air pipe, a sliding column is slidingly arranged on the inner side of the reversing shell, and an exhaust port is provided on one side of the reversing shell, an exhaust flow channel and a connecting flow channel are provided on the inner side of the sliding column, one end of the sliding column is elastically connected to the inner end of the reversing shell through a sliding column spring, an electromagnet for attracting the sliding column is installed at a position of the reversing shell near one end of the sliding column spring, and the two conductive detection rollers are electrically connected to the two contacts of the switch in the circuit of the electromagnet.

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

[0012] Preferably, a slide groove is provided inside the end cover at a position corresponding to each slider, and the multiple sliders are slidably connected to the inner sides of the multiple slide grooves, 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 plate is elastically connected to the outer side of the shell at the position of the push plate, and one end of the non-return spring plate is attached to the lower end of the push plate.

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

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

[0016] Preferably, one end of the two support platforms is threadedly connected to an adjusting screw, and one end of the two adjusting screws is rotatably connected to one end of the two sleeves respectively.

[0017] The present invention provides a surface grinding device for processing a large rock drilling tail through improvement. Compared with the prior art, it has the following improvements and advantages:

[0018] First, the present invention drives the three-jaw chuck to achieve reciprocating movement through a reciprocating mechanism. The three-jaw chuck can fix the drill tail and drive the drill tail to reciprocate synchronously. The shell and the end cover are provided with a center hole concentric with the three-jaw chuck inside the shell and the end cover, so that the three-jaw chuck can drive the drill tail to reciprocate inside the center hole. At the same time, through the feeding mechanism, the multiple grinding wheels therein can be synchronously merged for a small distance each time the drill tail reciprocates once, realizing the effect of micro-feeding, and realizing the simultaneous grinding of multiple spline grooves, which not only improves the grinding efficiency, but also ensures that the grinding depth of each spline groove remains consistent, improves the processing accuracy of the spline groove of the drill tail, and thus improves the assembly accuracy of the drill tail in the rock drill.

[0019] 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

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention from a first perspective;

[0022] Figure 2 This is a schematic diagram of the structure from a second viewing angle of the present invention;

[0023] Figure 3 Schematic diagram of the front side cross-sectional structure of the housing in the present invention;

[0024] Figure 4 Schematic diagram of the rear side cross-sectional structure of the housing in the present invention;

[0025] Figure 5 It is a partial cross-sectional structural schematic diagram of the present invention;

[0026] Figure 6 For the present invention Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure at B in the middle;

[0028] Figure 8 For the present invention Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0029] Figure 9 This is a schematic structural diagram of the three-jaw chuck and the shank close to the housing in the present invention;

[0030] Figure 10 Schematic diagram of the circuit connection between the electromagnet and the two conductive detection rollers in the present invention.

[0031] Reference numerals:

[0032] 1. Table; 2. Three-jaw chuck; 3. Housing; 4. End cover; 5. Slide; 6. Slider; 7. Grinding wheel; 8. Worm; 9. Worm wheel; 10. Arc groove; 11. Sliding pin; 12. Grinding motor; 13. Non-return spring; 14. Friction plate; 101. Main motor; 102. Reciprocating screw; 103. Slide plate; 104. Guide rod; 105. Vertical plate; 201. Raised ring; 202. First engaging tooth; 203. Second engaging tooth; 204. Rotating shaft; 205. Friction wheel; 206. One-way bearing; 301. Support table; 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, sliding column; 503, exhaust port; 504, exhaust flow channel; 505, connecting flow channel; 506, sliding column spring; 507, electromagnet. DETAILED DESCRIPTION

[0033] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] The present invention provides a surface grinding device for processing a large rock drilling tail through improvement. The technical solution of the present invention is:

[0035] like Figures 1 to 10As shown, an embodiment of the present invention provides a surface grinding device for processing large drill tails for rock drilling, comprising a table 1, and further comprising: a three-jaw chuck 2 arranged above the table 1 through a reciprocating drive mechanism, a shell 3 and an end cover 4 fixed above the table 1 and fixed to each other, a plurality of sliders 6 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 slide groove 5 is provided at the position corresponding to each slider 6 in the interior of the end cover 4, a plurality of sliders 6 are slidably connected to the inner side of the plurality of slide grooves 5, a grinding motor 12 for driving the grinding wheel 7 to rotate is installed on one side of each slider 6, a feed mechanism for driving the plurality of grinding wheels 7 to merge synchronously is provided on the inner side of the shell 3; the feed mechanism comprises a worm 8 and a worm wheel 9 rotatably connected to the inner side of the shell 3 and meshing with each other, and a worm 8 and a worm wheel 9 rotatably connected to each slider 6. A plurality of arcuate grooves 10 are formed inside the worm wheel 9, and each slide pin 11 is movably adapted to the inner side of each arcuate groove 10. A clutch transmission mechanism is provided at one end of the worm 8 to drive it to rotate intermittently in a directional manner. The clutch transmission mechanism includes a convex ring 201 that can be separated from and engaged with the end of the worm 8, and a second engaging tooth 203 fixed to the end of the worm 8. A first engaging tooth 202 that meshes with the second engaging tooth 203 is fixed to one end of the convex ring 201. The clutch transmission mechanism also includes a rotating shaft 204 movably inserted into one end of the worm 8. The rotating shaft 204 passes through and is fixed to the interior of the convex ring 201, and the outer end of the rotating shaft 204 is connected to a friction wheel 205 via a one-way bearing 206. The mechanism also includes a detection trigger mechanism that stops the feed mechanism when the spline groove reaches a specified depth.

[0036] Furthermore, the detection trigger mechanism includes two support platforms 301 arranged on the upper side of the table 1. Sleeves 302 are slidably provided on the upper side of each support platform 301. Extension rods 303 are slidably inserted into one end of each sleeve 302. One end of each extension rod 303 is fixed with a conductive wheel frame 304. One end of each wheel frame 304 is rotatably connected to a conductive detection roller 305. The mechanism also includes a pneumatic transmission mechanism for pushing the convex ring 201 to separate from the worm 8.

[0037] The depth of the spline groove can be detected by detecting the trigger mechanism. When the depth of the spline groove reaches the specified value, the feed mechanism can stop moving, thereby stopping the combined movement of the multiple grinding wheels 7, so that the multiple grinding wheels 7 no longer continue to grind the spline groove, ensuring that the grinding depth of the spline groove remains consistent each time, thereby improving the processing accuracy of the spline groove of the shank.

[0038] 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 table 1 and concentric with the three-jaw chuck 2. The inner sides of the first piston cylinder 401 and the second piston cylinder 405 are respectively slidably connected with the first piston plate 403 and the second piston plate 407. One end of the first piston plate 403 and the second piston plate 407 are respectively fixed with the first piston rod 402 and the second piston rod 406 extending to the outside. The other end of the second piston plate 407 is provided with a piston spring 408 elastically connected to the inner end 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 outer side of the convex ring 201. The inner end of the first piston cylinder 401 is connected to the inner end of the second piston cylinder 405 through an air pipe 409. A reversing mechanism for adjusting the direction of airflow is provided at the middle position of the air pipe 409.

[0039] Through the pneumatic transmission mechanism, when the spline groove depth reaches the specified depth, the convex ring 201 in the clutch transmission mechanism can be driven to separate from one end of the worm 8, so that the feed mechanism can stop moving and the multiple grinding wheels 7 can stop merging, thereby stopping further grinding of the spline groove depth, ensuring the depth consistency of the spline groove of each drill tail.

[0040] Furthermore, the reversing mechanism includes a reversing housing 501 connected to the middle section of the air pipe 409. A slide post 502 is slidably provided on the inner side of the reversing housing 501. An exhaust port 503 is provided on one side of the reversing housing 501. An exhaust flow channel 504 and a communication flow channel 505 are provided on the inner side of the slide post 502. One end of the slide post 502 is elastically connected to one end of the inner side of the reversing housing 501 via a slide post spring 506. An electromagnet 507 for attracting the slide post 502 is installed near one end of the slide post spring 506 in the reversing housing 501. Two conductive detection rollers 305 are electrically connected to two contacts of a switch in the circuit of the electromagnet 507.

[0041] When the exhaust flow channel 504 in the reversing mechanism is connected to the air pipe 409, the air inside the second piston cylinder 405 will not move toward the inside of the first piston cylinder 401. When the connecting flow channel 505 in the ventilation mechanism is connected to the air pipe 409, the air inside the second piston cylinder 405 can move toward the inside of the first piston cylinder 401, thereby separating the convex ring 201 from one end of the worm gear 8.

[0042] Furthermore, a non-return spring piece 13 is elastically connected to the outer side of the housing 3 at the position of the push plate 404, and one end of the non-return spring piece 13 is attached to the lower end of the push plate 404;

[0043] 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 non-return spring piece 13. When the lower end of the push plate 404 moves to the end of the non-return spring piece 13, the non-return spring piece 13 rebounds from the bending to become straight under the action of elastic force. At this time, the end of the straight non-return spring piece 13 can block one side of the push plate 404, thereby preventing the push plate 404 from moving in the opposite direction, thereby preventing the first piston rod 402 and the first piston plate 403 from moving in the opposite direction. Before processing the next drill tail, the end of the non-return spring piece 13 is bent downward, and the push plate 404 is pushed to make the first piston rod 402 retract into the inner side of the first piston cylinder 401 again, so as to facilitate the same grinding process on the next drill tail.

[0044] It should be noted that a friction plate 14 is fixed to one side of the three-jaw chuck 2 for driving the friction wheel 205 to rotate.

[0045] Furthermore, the reciprocating drive mechanism includes two vertical plates 105 fixed to the upper side of the table 1, two guide rods 104 are fixed between the two vertical plates 105, and a reciprocating screw 102 is rotatably connected between the two vertical plates 105, a main motor 101 for driving the reciprocating screw 102 is installed on one side of one of the vertical plates 105, and a slide plate 103 is slidably connected to the outer side of the two guide rods 104, the reciprocating screw 102 and the slide plate 103 are adapted to each other, and the upper side of the slide plate 103 is fixed to the three-jaw chuck 2;

[0046] During operation, the main motor 101 of the reciprocating drive mechanism drives the reciprocating screw 102 to rotate. When the reciprocating screw 102 rotates, it adapts to the slide 103, and can drive the slide 103 to move back and forth linearly. The slide 103 drives the three-jaw chuck 2 to move back and forth linearly. The three-jaw chuck 2 drives the drill tail to move back and forth linearly, so that the spline end of the drill tail moves back and forth inside the center hole of the shell 3 and the end cover 4, so that the multiple grinding wheels 7 can move back and forth relative to the spline end of the drill tail. At the same time, the operation of multiple grinding motors 12 drives the multiple grinding wheels 7 to rotate respectively, and the rotation of the multiple grinding wheels 7 grinds each spline groove respectively.

[0047] Reference Figure 7 One end of each of the two support platforms 301 is threadedly connected to an adjusting screw 307, and one end of the two adjusting screws 307 is rotatably connected to one end of each of the two sleeves 302;

[0048] When it is necessary to make the detection trigger mechanism detect spline grooves of different depths, the adjusting screw 307 is rotated, and 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 shank can be adjusted. If a shallower spline groove needs to be processed, the conductive detection roller 305 can be adjusted close to the shank. If a deeper spline groove needs to be processed, the conductive detection roller 305 can be adjusted away from the shank.

[0049] Working principle: When in use, the shank that needs to be processed with spline groove is passed through the inside of the three-jaw chuck 2 and fixed by the three-jaw chuck 2. The inside of the shell 3 and the end cover 4 is provided with a center hole concentric with the three-jaw chuck 2, and the shank can pass through the center hole inside the shell 3 and the end cover 4. Figure 2 As shown, during operation, the main motor 101 of the reciprocating drive mechanism drives the reciprocating screw 102 to rotate. When the reciprocating screw 102 rotates, it adapts to the slide 103, and can drive the slide 103 to move back and forth linearly. The slide 103 drives the three-jaw chuck 2 to move back and forth linearly. The three-jaw chuck 2 drives the drill tail to move back and forth linearly, so that the spline end of the drill tail moves back and forth inside the center hole of the housing 3 and the end cover 4, so that the multiple grinding wheels 7 can reciprocate relative to the spline end of the drill tail. At the same time, the operation of the multiple grinding motors 12 respectively drives the multiple grinding wheels 7 to rotate, and the multiple grinding wheels 7 rotate to grind each spline groove respectively.

[0050] 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 outer side of the friction wheel 205 of the clutch transmission mechanism, thereby driving the friction wheel 205 to rotate counterclockwise by a certain angle, such as Figure 6 As shown, since the friction wheel 205 is connected to the rotating shaft 204 through the 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 outer side to rotate counterclockwise. Since the first coupling tooth 202 at one end of the convex ring 201 is coupled with the second coupling tooth 203 at one end of the worm 8, the convex ring 201 can drive the worm 8 to rotate counterclockwise. The counterclockwise rotation of the worm 8 can drive the worm wheel 9 to rotate a certain angle, and the worm wheel 9 drives the multiple arc grooves 10 inside it to rotate a certain angle. Angle, multiple arc grooves 10 are movably adapted with multiple sliding pins 11 respectively, so when the multiple arc grooves 10 rotate, the multiple sliders 6 can be driven by the sliding pins 11 to merge synchronously, and the multiple sliders 6 move a certain distance along the inner side of the multiple slide grooves 5 respectively. The multiple sliders 6 drive the multiple grinding wheels 7 to merge synchronously, thereby realizing the synchronous feeding of the multiple grinding wheels 7. During each reciprocation of the shank, the multiple grinding wheels 7 can merge a certain distance, thereby further grinding the depth of the spline groove, realizing the simultaneous grinding of multiple spline grooves, not only improving the grinding 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, and facilitating the disassembly and assembly of the shank;

[0051] In order to ensure the machining accuracy of multiple spline grooves, a detection trigger mechanism is provided to detect the depth of the spline groove. When the depth of the spline groove reaches a specified value, the feed mechanism is stopped, thereby stopping the combined movement of the multiple grinding wheels 7, so that the multiple grinding wheels 7 no longer continue to grind the spline groove, ensuring that the grinding depth of the spline groove remains consistent each time, further improving the machining accuracy of the spline groove of the shank.

[0052] In specific operation, if the spline groove depth does not reach the specified depth, each time the three-jaw chuck 2 drives the shank tail close to the housing 3, the spline groove at the spline end of the shank 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 reversing mechanism, the power supply, the switch and the electromagnet 507 in the circuit are connected in series, such as Figure 10 As shown in the circuit diagram, when both conductive detection rollers 305 are in contact with the spline groove of the shank, the two conductive detection rollers 305 can be electrically connected through the shank body, so the two wheel frames 304 are electrically connected through the shank body, and the two contacts of the switch in the electromagnet 507 circuit are also electrically connected through the shank body, thereby making the circuit of the electromagnet 507 conductive, so that the electromagnet 507 is energized to generate electromagnetic attraction to the slide column 502. After being attracted by the electromagnetic attraction, the slide column 502 moves toward the end where the electromagnet 507 is located and compresses the slide column spring 506. The slide column 502 simultaneously drives the exhaust flow channel 504 and the connecting flow channel 505 to move, so that one end of the exhaust flow channel 504 is aligned with the air pipe 409, and the other end of the exhaust flow channel 504 is aligned with the exhaust port 503. At this time, the second piston cylinder 40 The inner end of the second piston cylinder 405 is connected to the outside world through the air pipe 409 and the exhaust channel 504. When the shank adapter moves, it pushes the second piston rod 406 of the pneumatic transmission mechanism, causing the second piston rod 406 to drive the second piston plate 407 to move inside the second piston cylinder 405. The second piston plate 407 compresses the piston spring 408 and simultaneously presses the air at the inner end of the second piston cylinder 405 into the air pipe 409. The air is then pressed into the exhaust channel 504 through one end of the air pipe 409 and finally discharged outward through the exhaust port 503. At this time, the air at the inner end of the exhaust channel 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 protruding ring 201 to move. Therefore, the protruding ring 201 and the worm 8 are still in a coupled state.

[0053] 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 pressure to the wheel frame 304 and the conductive detection roller 305, so that the conductive detection roller 305 can be tightly attached to the spline groove surface of the shank, ensuring the stability of current transmission.

[0054] After multiple reciprocating grinding operations, the spline groove of the shank tail reaches a certain depth. At this time, 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 shank tail body, thereby not conducting the circuit of the electromagnet 507. Then, the slide post 502 in the reversing mechanism is reset under the elastic force of the slide post spring 506, so that the two ends of the communication channel 505 are aligned and connected with the air pipe 409. At this time, when the shank tail pushes the second piston rod 406 of the pneumatic transmission mechanism, the air at one end of the inner side of the second piston cylinder 405 can be passed through the air pipe 409 and the communication channel 507. 05 is pressed into one end of the inner side of the first piston cylinder 401, thereby pushing the first piston rod 402 out, pushing the push plate 404 and the convex ring 201 to move, and the convex ring 201 is separated from one end of the worm 8, thereby separating the first coupling tooth 202 and the second coupling tooth 203. At this time, the rotational torque 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 tail continue to reciprocate, they will no longer drive the worm 8 of the feed mechanism to rotate, and will not drive the multiple grinding wheels 7 to continue to merge, thereby stopping the grinding of the spline groove of the drill tail, ensuring the consistency of the spline groove grinding depth of each drill tail;

[0055] 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 non-return spring plate 13. When the lower end of the push plate 404 moves to the end of the non-return spring plate 13, the non-return spring plate 13 rebounds from the bending to become straight under the action of elastic force. At this time, the end of the straight non-return spring plate 13 can block one side of the push plate 404, preventing the push plate 404 from moving in the opposite direction, thereby preventing the first piston rod 402 and the first piston plate 403 from moving in the opposite direction. Before processing the next drill tail, bend the end of the non-return spring plate 13 downward, push the push plate 404, so that the first piston rod 402 is retracted into the inside of the first piston cylinder 401 again, and then manually rotate the worm 8 in the opposite direction, thereby driving the worm wheel 9 to rotate in the opposite direction, so that the merged multiple grinding wheels 7 are separated again, which is convenient for the same grinding process on the next drill tail.

[0056] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A surface grinding device for processing a large rock drilling tail, comprising a platen, characterized in that: Also includes: A three-jaw chuck is arranged above the table through a reciprocating drive mechanism, and a housing and an end cover are fixed above the table and fixed to each other. A plurality of sliders are movably arranged on one side of the end cover, and one end of each slider is rotatably connected to a grinding wheel. A feeding mechanism is arranged on the inner side of the housing to drive the multiple grinding wheels to merge synchronously. The feed mechanism includes a worm and worm wheel rotatably connected to the inside of the housing and meshing with each other, and a sliding pin rotatably connected to the other end of each slider. The interior of the worm wheel is provided with a plurality of arcuate slots, and each sliding pin is movably adapted to the inner side of each arcuate slot. One end of the worm is provided with a clutch transmission mechanism that can drive it to rotate intermittently in a directional manner. The clutch transmission mechanism includes a convex ring that can be separated from and combined with the end of the worm, a second combining tooth fixed to the end of the worm, and a first combining tooth that is engaged with the second combining tooth fixed at one end of the convex ring; Also included is a detection trigger mechanism that stops the feed mechanism when the spline groove reaches a specified depth; The detection trigger mechanism includes two support platforms arranged on the upper side of the table, and sleeves are slidably arranged on the upper side of the two support platforms. Extension rods are slidably inserted at one end of the two sleeves, and conductive wheel frames are fixed at one end of the two extension rods. Conductive detection rollers are rotatably connected to one end of the two wheel frames, and also includes a pneumatic transmission mechanism that pushes the convex ring to separate from the worm gear.

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

3. The surface grinding device for processing a large rock drilling shank according to claim 2, characterized in that: The reversing mechanism includes a reversing shell connected to the middle section of the air pipe, a sliding column is slidingly arranged on the inner side of the reversing shell, and an exhaust port is opened on one side of the reversing shell, an exhaust flow channel and a connecting flow channel are opened on the inner side of the sliding column, one end of the sliding column is elastically connected to the inner end of the reversing shell through a sliding column spring, an electromagnet for attracting the sliding column is installed at one end of the reversing shell near the sliding column spring, and two conductive detection rollers are electrically connected to the two contacts of the switch in the circuit of the electromagnet.

4. The surface grinding device for processing a large rock drilling tail according to claim 1, characterized in that: The clutch transmission mechanism also includes a rotating shaft movably inserted at one end of the worm, the rotating shaft passes through and is fixed inside the convex ring, and the outer end of the rotating shaft is connected to the friction wheel through a one-way bearing.

5. The surface grinding device for processing a large rock drilling tail according to claim 1, characterized in that: A slide groove is provided inside the end cover at a position corresponding to each slider, and the multiple sliders are slidably connected to the inner sides of the multiple slide grooves. A grinding motor for driving the grinding wheel to rotate is installed on one side of each slider.

6. The surface grinding device for processing a large rock drilling tail according to claim 2, characterized in that: The outer side of the shell is elastically connected to a non-return spring plate at the position of the push plate, and one end of the non-return spring plate is fitted on the lower end of the push plate.

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

8. The surface grinding device for processing a large rock drilling tail according to claim 1, characterized in that: The reciprocating drive mechanism includes two vertical plates fixed on the upper side of the table, two guide rods fixed between the two vertical plates, and a reciprocating screw rotatably connected between the two vertical plates. A main motor for driving the reciprocating screw to rotate is installed on one side of one of the vertical plates, and a slide is slidably connected to the outer side of the two guide rods. The reciprocating screw and the slide are adapted to each other, and the upper side of the slide is fixed to the three-jaw chuck.

9. The surface grinding device for processing a large rock drilling shank according to claim 1, characterized in that: One end of the two support platforms is threadedly connected with an adjusting screw, and one end of the two adjusting screws is rotatably connected to one end of the two sleeves respectively.

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