CN112576209B - Rear clamping assembly of drilling machine - Google Patents
Rear clamping assembly of drilling machine Download PDFInfo
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- CN112576209B CN112576209B CN202110104440.1A CN202110104440A CN112576209B CN 112576209 B CN112576209 B CN 112576209B CN 202110104440 A CN202110104440 A CN 202110104440A CN 112576209 B CN112576209 B CN 112576209B
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- 238000005553 drilling Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 230000003068 static effect Effects 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 15
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 40
- 239000010720 hydraulic oil Substances 0.000 description 6
- 230000005484 gravity Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides a rear clamping assembly of a drilling machine, which belongs to the technical field of drilling machine accessories and comprises a gear box, wherein a driving shaft is arranged at the output end of the gear box, a rear clamping device is arranged on the driving shaft, and telescopic oil cylinders are symmetrically arranged on two sides of the driving shaft; the rear clamp holder comprises a rotary sleeve, a taper sleeve, a feeding sleeve, slips and an oil cylinder supporting sleeve; the rear end of the rotary sleeve is fixedly connected with the driving shaft, and strip-shaped holes are formed at equal intervals along the circumferential direction; the taper sleeve is sleeved outside the rotary sleeve, and the small end face is fixedly connected with the front end of the rotary sleeve; the feeding sleeve is sleeved outside the rotating sleeve in a sliding manner; the slips are in radial sliding fit with the front end of the feeding sleeve, and are positioned in the strip-shaped holes; the oil cylinder supporting sleeve is rotationally sleeved outside the feeding sleeve; the two ends of the telescopic oil cylinder are respectively connected with the box body and the oil cylinder supporting sleeve in a rotating way. The slips are controlled by the two external telescopic cylinders to clamp the drill rod, so that the whole oil distribution assembly is omitted, the maintenance of the oil distribution assembly is avoided, and a piston and various sealing elements are not required to be installed in the rear clamp holder.
Description
Technical Field
The invention belongs to the technical field of drilling machine accessories, and particularly discloses a rear clamping assembly of a drilling machine.
Background
The rear clamping assembly of the drilling machine is an important moving part in the working state of the drilling machine and comprises a gear box, a rear clamping device and an oil distribution assembly, wherein the rear clamping device and the oil distribution assembly are arranged on two sides of the gear box, the rear clamping assembly of the drilling machine is arranged on a pushing mechanism of the drilling machine, the drilling machine can drill in a coal seam, the clamping force is mainly applied to a drill rod by means of slips of the rear clamping device, the gear box drives the drill rod to rotate, the pushing mechanism drives the drill rod to move back and forth to enter the working state, and the oil distribution assembly is used for providing hydraulic oil for the rear clamping device. The applicant designs a rear clamp of a large torque drilling machine and an oil distribution assembly (CN 202020105865.5) thereof, wherein the rear clamp adopts a built-in piston, an oil distribution shell of the oil distribution assembly is fixed on a gear box, an oil way is arranged on a lining connected with the oil distribution shell through a bearing, the oil way of the lining is connected with an oil port of the rear clamp through a long hole drilled on a driving shaft of the gear box, and the lining is clamped and rotated later. In use, the following problems exist:
1. the sealing element used for guaranteeing the tightness of the piston in the rear clamp holder belongs to an easily worn part, and needs to be frequently disassembled and replaced, so that the engineering quantity of the clamp holder is very large after the underground disassembly, and the replacement is not easy;
2. the inner lining and the oil distribution shell move relatively, the long-time rotary seal is extremely easy to damage, and the failure rate of the oil distribution assembly is high.
At present, a hydraulic motor and a brake in a drilling machine are assembled on the same side of a gear box, a dynamic friction plate in a downhole brake is easy to wear in a long-term running state, braking force is insufficient, the hydraulic motor and a pipeline connected with the hydraulic motor are required to be detached when the brake is required to be replaced periodically, and therefore labor and effort are wasted and efficiency is low.
Disclosure of Invention
The invention aims to provide a rear clamping assembly of a drilling machine, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides a rear clamping assembly of a drilling machine, which comprises a gear box, wherein an input end and an output end are arranged on a box body of the gear box, a driving shaft is arranged on the output end, a rear clamping device is arranged on the driving shaft, and telescopic oil cylinders are symmetrically arranged on two sides of the driving shaft; the rear clamp holder comprises a rotary sleeve, a taper sleeve, a feeding sleeve, slips and an oil cylinder supporting sleeve; the rear end of the rotary sleeve is fixedly connected with the driving shaft, and more than two strip-shaped holes are formed at equal intervals along the circumferential direction; the taper sleeve is sleeved outside the rotary sleeve, and the small end face is fixedly connected with the front end of the rotary sleeve; the feeding sleeve is sleeved outside the rotating sleeve in a sliding manner; the slips are in radial sliding fit with the front end of the feeding sleeve, the slips are positioned in the strip-shaped holes, and the front ends of the slips are positioned between the large end face of the taper sleeve and the rotating sleeve; the oil cylinder supporting sleeve is rotationally sleeved outside the feeding sleeve; the two ends of the telescopic oil cylinder are respectively connected with the box body and the oil cylinder supporting sleeve in a rotating way, and the oil cylinder supporting sleeve and the feeding sleeve are pushed to axially move along the rotating sleeve.
Further, the front end of the feeding sleeve is provided with an annular groove; the slips comprise clamping blocks and clamping blocks, the clamping blocks are installed in the annular grooves through connecting pins which are arranged radially, and the radial size of the clamping blocks is smaller than that of the annular grooves.
Further, the clamping block is a right trapezoid block, the clamping block is arranged on the inclined plane of the clamping block, and the inclination angle of the clamping block is matched with the inclination angle of the taper sleeve.
Further, the feeding sleeve is sleeved with a bearing and a wear-resistant ring, the oil cylinder supporting sleeve is rotationally connected with the feeding sleeve through the bearing, and the oil cylinder supporting sleeve is rotationally contacted with the wear-resistant ring.
Further, the input end of the gear box is positioned at the rear side of the box body, a brake is arranged at the front side of the box body and corresponds to the input end, and the brake is a spring brake hydraulic release type brake.
Further, the input end of the gear box comprises an annular gear, a planet carrier, a sun gear and a planet gear; the front end of the inner gear ring is fixed at the rear side of the box body; the planet carrier comprises a wheel disc sleeve and a shaft sleeve I and a shaft sleeve II which are arranged on two sides of the wheel disc sleeve, a plurality of through holes are formed in the circumferential surface of the wheel disc sleeve, the wheel disc sleeve is positioned in the annular gear, and the shaft sleeve I is rotationally connected with the box body; the central gear is rotatably arranged in the planet carrier, the wheel disc is positioned in the wheel disc sleeve, and the wheel shaft is positioned in the shaft sleeve II and connected with the input device; the planetary gears are uniformly meshed with the outer side of the central gear, the wheel shaft is rotationally connected with the wheel disc sleeve, and the wheel disc penetrates through the through hole to be meshed with the annular gear; the brake is connected with the box body through a connecting sleeve and comprises a shell, a friction plate fixing frame, an end cover frame, a friction plate group, a piston, a spring seat and a spring I; the rear end of the connecting sleeve is fixed on the front side of the box body, the front end of the connecting sleeve is connected with the rear end of the shell, and an oil hole is formed in the connecting sleeve; the shell is sequentially provided with a piston mounting hole I and a piston mounting hole II from front to back; the friction plate fixing frame is arranged in the connecting sleeve and the box body and comprises a fixing sleeve and a fixing shaft; the front end of the fixed sleeve is provided with an opening, the rear end of the fixed sleeve is closed, the circumferential surface is provided with a plurality of opening grooves, and the front end of the fixed sleeve is connected with the rear end of the shell to form a friction plate mounting cavity; the fixed shaft is arranged at the rear end of the fixed sleeve and is arranged in the shaft sleeve I through an axially arranged key and a key slot; the end cover frame comprises an end cover and an end cover shaft, and the end cover seals the front end of the shell; the end cover shaft comprises a spline section and a smooth section for connecting the spline section and the end cover shaft, the end cover shaft penetrates through the shell and stretches into the fixed sleeve, and the rear end of the end cover shaft is connected with the fixed sleeve; the friction plate group comprises a plurality of movable friction plates and static friction plates which are arranged in the friction plate mounting cavity, and the movable friction plates and the static friction plates are alternately sleeved on the spline section; the dynamic friction plate is a circular plate with a clamping plate at the outer edge, and the clamping plate is clamped into the open slot; the static friction plate is a circular plate with a spline groove at the inner edge, and the spline groove is matched with the spline section; the piston is arranged on the smooth section in a sliding penetrating way and comprises a piston head and a piston column, a spring seat is sleeved outside the piston column, and the piston head and the spring seat are both positioned in the piston mounting hole I; the springs I are arranged between the spring seat and the piston head, two ends of the springs I are respectively connected with the spring seat and the piston head, and the springs I apply force to the piston to enable the piston column to pass through the piston mounting hole II to press the friction plate group.
Further, a sealing gasket I is sleeved on the spline section between the friction plate group and the shell, and a spline groove matched with the spline section is formed in the inner edge of the sealing gasket I; a sealing gasket II is sleeved on the smooth section between the sealing gasket I and the piston column, and a sealing gasket mounting hole for mounting the sealing gasket II is formed in the shell.
Further, the rear end of the end cover shaft is provided with an ejector pin hole, the flexible ejector pin is connected with the ejector pin hole through a spring II, and the rear end of the flexible ejector pin is contacted with the fixed sleeve.
Further, the rear end of the annular gear is connected with an input device connecting disc, and the input device connecting disc is rotationally connected with the shaft sleeve II.
Further, the end cover is provided with an exhaust hole.
The invention has the following beneficial effects:
1. according to the invention, two telescopic cylinders extend out to drive the cylinder support sleeve, the feeding sleeve and the slips to move forwards, the slips move towards the inside of the rotary sleeve under the compression of the conical inner wall of the conical sleeve, a drill rod is clamped, and the driving shaft drives the rotary sleeve, the drill rod, the slips and the feeding sleeve to rotate; the two telescopic cylinders shrink to drive the cylinder support sleeve, the feeding sleeve and the slips to move backwards, and the slips positioned below move towards the outside of the rotary sleeve under the action of self gravity to loosen the drill rod; the slips are controlled by the two external telescopic cylinders to clamp the drill rod, so that the whole oil distribution assembly is omitted, the maintenance of the oil distribution assembly is avoided, a piston and various sealing elements are not required to be installed in the rear clamp holder, the structure of the rear clamp holder is greatly simplified, the overhaul frequency is reduced, and the complex machining process of punching long holes on a driving shaft is also omitted;
2. The input end and the brake are respectively arranged at two sides of the box body, and only the brake is disassembled when the brake is overhauled, so that input devices such as a hydraulic motor and the like are not required to be disassembled;
3. The brake has compact structure and good braking effect, is integrally connected with the connecting sleeve through the shell, and is convenient to assemble and disassemble.
Drawings
FIG. 1 is a perspective view of a rear clamping assembly of a drilling rig;
FIG. 2 is an elevation view of the rear clamping assembly of the drilling machine;
FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 2;
FIG. 4 is a cross-sectional view taken along the direction B-B in FIG. 2;
FIG. 5 is an enlarged view of portion A of FIG. 4;
fig. 6 is a diagram showing the engagement of the carrier with the brake.
Wherein, the names corresponding to the reference numerals are:
1-a box body; 2-driving shaft; 3-a telescopic oil cylinder; 4-rotating the sleeve; 4.1-bar-shaped holes; 5-taper sleeve; 6-feeding sleeve; 6.1-annular grooves; 7-slips; 8-an oil cylinder supporting sleeve; 9-connecting pins; 10-bearing; 11-wear rings; 12-an inner gear ring; 13-a planet carrier; 14-a sun gear; 15-planet wheels; 16-connecting sleeve; 16.1-oil holes; 17-a housing; 18-a friction plate fixing frame; 19-end cap rack; 19.1-exhaust holes; 20-a piston; 21-a spring seat; 22-spring I; 23-a dynamic friction plate; 24-static friction plate; 25-sealing gasket I; 26-a sealing gasket II; 27-a flexible thimble; 28-spring II; 29-input device pads; 30-an input gear; 31-an output gear; 32-soft adjustment head.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment provides a rear clamping assembly of a drilling machine, which comprises a gear box, wherein an input end and an output end are arranged on a box body 1 of the gear box, a driving shaft 2 is arranged on the output end, a rear clamping device is arranged on the driving shaft 2, and telescopic oil cylinders 3 are symmetrically arranged on two sides of the driving shaft 2; the rear clamp holder comprises a rotary sleeve 4, a taper sleeve 5, a feeding sleeve 6, slips 7 and an oil cylinder supporting sleeve 8; the rear end of the rotary sleeve 4 is fixedly connected with the driving shaft 2, and more than two strip-shaped holes 4.1 are arranged at equal intervals along the circumferential direction; the taper sleeve 5 is sleeved outside the rotary sleeve 4, and the small end face is fixedly connected with the front end of the rotary sleeve 4; the feeding sleeve 6 is sleeved outside the rotary sleeve 4 in a sliding way; the slips 7 are in radial sliding fit with the front end of the feeding sleeve 6, the slips 7 are positioned in the strip-shaped holes 4.1, and the front end of the slips 7 is positioned between the large end face of the taper sleeve 5 and the rotating sleeve 4; the oil cylinder supporting sleeve 8 is rotatably sleeved outside the feeding sleeve 6; the two ends of the telescopic oil cylinder 3 are respectively connected with the box body 1 and the oil cylinder supporting sleeve 8 in a rotating way, and the oil cylinder supporting sleeve 8 and the feeding sleeve 6 are pushed to move along the axial direction of the rotating sleeve 4.
In the rear clamping assembly of the drilling machine, two telescopic oil cylinders 3 extend out to drive an oil cylinder supporting sleeve 8, a feeding sleeve 6 and a slip 7 to move forwards, the slip 7 moves towards the inside of a rotating sleeve 4 under the compression of the conical inner wall of a conical sleeve 5, a drill rod is clamped, and a driving shaft 2 drives the rotating sleeve 4, the drill rod, the slip 7 and the feeding sleeve 6 to rotate; the two telescopic cylinders 3 shrink to drive the cylinder support sleeve 8, the feeding sleeve 6 and the slips 7 to move backwards, and the slips 7 positioned below move towards the outside of the rotary sleeve 4 under the action of self gravity to loosen a drill rod; the slips 7 are controlled by the two external telescopic cylinders 3 to clamp the drill rod, so that the whole oil distribution assembly is omitted, the maintenance of the oil distribution assembly is avoided, a piston and various sealing elements are not required to be installed in the rear clamp holder, the structure of the rear clamp holder is greatly simplified, the overhaul frequency is reduced, and the complex machining process for punching long holes on the driving shaft 2 is also omitted. The slips 7 are in one-to-one correspondence with the strip-shaped holes 4.1, so that at least one slip 7 can move outside the rotary sleeve 4 under the action of self gravity after the driving shaft 2 stops rotating. In this embodiment, the number of slips 7 and the number of strip-shaped holes 4.1 are three.
Further, the front end of the feeding sleeve 6 is provided with an annular groove 6.1; the slips 7 comprise gripping blocks and clamping blocks, the clamping blocks are mounted in the annular grooves 6.1 through connecting pins 9 which are arranged radially, and the radial dimension of the clamping blocks is smaller than that of the annular grooves 6.1, so that the slips 7 can move radially along the connecting pins 9.
Further, the clamping block is a right trapezoid block, the clamping block is arranged on the inclined plane of the clamping block, and the inclined angle of the clamping block is matched with the inclined angle of the taper sleeve 5, so that the inclined plane of the clamping block is attached to the tapered inner wall of the taper sleeve 5.
Further, a bearing 10 and a wear-resistant ring 11 are sleeved outside the feeding sleeve 6, and the oil cylinder supporting sleeve 8 is rotatably connected with the feeding sleeve 6 through the bearing 10; the oil cylinder supporting sleeve 8 is in rotary contact with the wear-resistant ring 11 but not in direct contact with the feeding sleeve 6, so that the feeding sleeve 6 is prevented from being worn.
Further, the input end of the gear box is positioned at the rear side of the box body 1, a brake is arranged at the position, corresponding to the input end, of the front side of the box body 1, and the brake is a spring brake hydraulic release type brake.
Further, the input end of the gearbox comprises an annular gear 12, a planet carrier 13, a sun gear 14 and planet gears 15; the front end of the inner gear ring 12 is fixed at the rear side of the box body 1; the planet carrier 13 comprises a wheel disc sleeve, a shaft sleeve I and a shaft sleeve II which are arranged on two sides of the wheel disc sleeve, a plurality of through holes are formed in the circumferential surface of the wheel disc sleeve, the wheel disc sleeve is positioned in the annular gear 12, and the shaft sleeve I is rotationally connected with the box body 1; the sun gear 14 is rotatably arranged in the planet carrier 13, the wheel disc is positioned in the wheel disc sleeve, and the wheel shaft is positioned in the shaft sleeve II and connected with the input device; the planetary gears 13 are uniformly meshed with the outer side of the central gear 14, the wheel shafts are rotationally connected with the wheel disc sleeve, and the wheel disc penetrates through the through holes to be meshed with the annular gear 12; the brake is connected with the box body 1 through a connecting sleeve 16 and comprises a shell 17, a friction plate fixing frame 18, an end cover frame 19, a friction plate group, a piston 20, a spring seat 21 and a spring I22; the rear end of the connecting sleeve 16 is fixed on the front side of the box body 1, the front end is connected with the rear end of the shell 17, and the connecting sleeve 16 is provided with an oil hole 16.1; the shell 17 is provided with a piston mounting hole I and a piston mounting hole II from front to back in sequence; the friction plate fixing frame 18 is arranged in the connecting sleeve 16 and the box body 1 and comprises a fixing sleeve and a fixing shaft; the front end of the fixed sleeve is provided with an opening, the rear end is closed, the circumferential surface is provided with a plurality of opening grooves, and the front end is connected with the rear end of the shell 17 to form a friction plate mounting cavity; the fixed shaft is arranged at the rear end of the fixed sleeve, and is arranged in the shaft sleeve I through an axially arranged key and a key slot, so that the planet carrier 13 and the friction plate fixed frame 18 can axially translate and cannot relatively rotate; the end cap frame 19 includes an end cap closing the front end of the housing 17 and an end cap shaft; the end cover shaft comprises a spline section and a smooth section for connecting the spline section and the end cover shaft, the end cover shaft penetrates through the shell 17 and stretches into the fixed sleeve, and the rear end of the end cover shaft is connected with the fixed sleeve; the friction plate group comprises a plurality of movable friction plates 23 and static friction plates 24 which are arranged in the friction plate mounting cavity, and the movable friction plates 23 and the static friction plates 24 are sleeved on the spline section in a staggered manner; the movable friction plate 23 is a circular plate with a clamping plate at the outer edge, the clamping plate is clamped into the open slot, and the movable friction plate 23 and the friction plate fixing frame 18 can axially translate and cannot relatively rotate; the static friction plate 24 is a circular plate with a spline groove at the inner edge, the spline groove is matched with the spline section, and the static friction plate 24 and the end cover frame 19 can axially translate and cannot relatively rotate; the piston 20 is arranged on the smooth section in a sliding penetrating way and comprises a piston head and a piston column, a spring seat 21 is sleeved outside the piston column, and the piston head and the spring seat 21 are both positioned in the piston mounting hole I; a plurality of springs I22 are arranged between the spring seat 21 and the piston head, two ends of the springs I22 are respectively connected with the spring seat 21 and the piston head, and the springs I22 apply force to the piston 20 to enable a piston column to pass through the piston mounting hole II to press the friction plate group.
The process of the driving shaft 2 in the rear clamping assembly of the drilling machine is as follows:
The input device drives the sun gear 14 to rotate, the planet wheel 15 meshed with the sun gear 14 rotates, and as the annular gear 12 is fixed on the box body 1 and meshed with the planet wheel 15, the planet wheel 15 drives the planet carrier 13 to revolve around the sun gear 14 together, the input gear 30 is fixed on the planet carrier 13, the output gear 31 is fixed on the driving shaft 2, and the required output rotating speed is achieved through the cooperation of the input gear 30 and the output gear 31.
The process of the brake operation in the rear clamping assembly of the drilling machine is as follows:
In a braking state, the spring I22 applies force to the piston 20 to enable the piston column to pass through the piston mounting hole II to press the friction plate group, and the friction force between the movable friction plate 23 and the static friction plate 24 is used for preventing the friction plate fixing frame 18 and the planet carrier 13 connected with the friction plate fixing frame from rotating; in the brake release state, hydraulic oil enters the friction plate mounting cavity through the oil hole 16.1, the hydraulic oil applies force to the piston 20 to squeeze the spring I22, so that the piston 20 moves forwards, the pressure between the friction plate groups is reduced, the friction plate groups are separated along the spline sections, gaps between static friction plates and dynamic friction plates are increased, the friction plates are filled with the hydraulic oil, friction force is reduced, friction force between dynamic friction plates and dynamic friction plates is reduced to be negligible under the lubrication of the hydraulic oil, the planet carrier 13 drives the friction plate fixing frame 18 and the dynamic friction plates 23 connected with the friction plate fixing frame to rotate, and braking force disappears.
Further, a sealing gasket I25 is sleeved on the spline section between the friction plate group and the shell 17, and a spline groove matched with the spline section is formed in the inner edge of the sealing gasket I25; a sealing gasket II 26 is sleeved on the smooth section between the sealing gasket I25 and the piston column, and a sealing gasket mounting hole for mounting the sealing gasket II 26 is formed in the shell 17. The gaskets i 25 and ii 26 serve on the one hand as seals against the flow of hydraulic oil into the housing 17 and on the other hand as a force transmission medium for pushing the friction disc pack or piston 20.
Further, the rear end of the end cover shaft is provided with a thimble hole, the flexible thimble 27 is connected with the thimble hole through a spring II 28, and the rear end of the flexible thimble 27 is contacted with the fixed sleeve. During braking or braking releasing, the friction plate fixing frame 18 can axially deflect under the action of the movable friction plate 23, and flexible contact between the friction plate fixing frame 18 and the end cover frame 19 is realized through the flexible ejector pins 27 and the springs II 28, so that an axial deflection space of the friction plate fixing frame 18 is provided.
The rear end of the shaft sleeve I is provided with a wheel disc contact of the soft adjusting head 32 and the sun gear 14, so that collision friction between the sun gear 14 and the planet carrier 13 is prevented, and if the soft adjusting head 32 is worn, pressure is continuously supplemented through spring force, so that the soft adjusting head 32 is always contacted with the sun gear 14.
Further, an input device connection pad 29 is connected to the rear end of the ring gear 12, and the input device connection pad 29 is rotatably connected to the sleeve ii.
Further, an exhaust vent 19.1 is provided in the end cap to vent gas from the brake as the piston 20 moves.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The rear clamping assembly of the drilling machine comprises a gear box, an input end and an output end are arranged on a box body of the gear box, and a driving shaft is arranged on the output end;
the rear clamp holder comprises a rotary sleeve, a taper sleeve, a feeding sleeve, slips and an oil cylinder supporting sleeve;
the rear end of the rotary sleeve is fixedly connected with the driving shaft, and more than two strip-shaped holes are formed at equal intervals along the circumferential direction;
the taper sleeve is sleeved outside the rotary sleeve, and the small end face is fixedly connected with the front end of the rotary sleeve;
The feeding sleeve is sleeved outside the rotating sleeve in a sliding manner;
the slips are in radial sliding fit with the front end of the feeding sleeve, the slips are positioned in the strip-shaped holes, and the front ends of the slips are positioned between the large end face of the taper sleeve and the rotating sleeve;
the feeding sleeve is sleeved with a bearing and a wear-resistant ring, the oil cylinder supporting sleeve is rotationally connected with the feeding sleeve through the bearing, and the oil cylinder supporting sleeve is rotationally contacted with the wear-resistant ring;
the two ends of the telescopic oil cylinder are respectively and rotatably connected with the box body and the oil cylinder supporting sleeve, and the oil cylinder supporting sleeve and the feeding sleeve are pushed to move along the axial direction of the rotating sleeve;
The front end of the feeding sleeve is provided with an annular groove;
the slips comprise clamping blocks and clamping blocks, the clamping blocks are installed in the annular grooves through connecting pins which are arranged radially, and the radial size of the clamping blocks is smaller than that of the annular grooves.
2. The drilling machine rear clamping assembly according to claim 1, wherein the clamping block is a right trapezoid block, the clamping block is arranged on an inclined plane of the clamping block, and the inclination angle of the clamping block is matched with the inclination angle of the taper sleeve.
3. The drill rear clamping assembly according to claim 1 or 2, wherein the input end of the gearbox is located at the rear side of the box, and a brake is provided at a position on the front side of the box corresponding to the input end, the brake being a spring brake hydraulic release brake.
4. The drill rear clamping assembly of claim 3 wherein the input end of the gearbox comprises an annulus gear, a planet carrier, a sun gear, and a planet gear;
The front end of the inner gear ring is fixed at the rear side of the box body;
The planet carrier comprises a wheel disc sleeve and a shaft sleeve I and a shaft sleeve II which are arranged on two sides of the wheel disc sleeve, a plurality of through holes are formed in the circumferential surface of the wheel disc sleeve, the wheel disc sleeve is positioned in the annular gear, and the shaft sleeve I is rotationally connected with the box body;
the central gear is rotatably arranged in the planet carrier, the wheel disc is positioned in the wheel disc sleeve, and the wheel shaft is positioned in the shaft sleeve II and connected with the input device;
The planetary gears are uniformly meshed with the outer side of the central gear, the wheel shaft is rotationally connected with the wheel disc sleeve, and the wheel disc penetrates through the through hole to be meshed with the annular gear;
the brake is connected with the box body through a connecting sleeve and comprises a shell, a friction plate fixing frame, an end cover frame, a friction plate group, a piston, a spring seat and a spring I;
the rear end of the connecting sleeve is fixed on the front side of the box body, the front end of the connecting sleeve is connected with the rear end of the shell, and an oil hole is formed in the connecting sleeve;
the shell is sequentially provided with a piston mounting hole I and a piston mounting hole II from front to back;
The friction plate fixing frame is arranged in the connecting sleeve and the box body and comprises a fixing sleeve and a fixing shaft;
The front end of the fixed sleeve is provided with an opening, the rear end of the fixed sleeve is closed, the circumferential surface is provided with a plurality of opening grooves, and the front end of the fixed sleeve is connected with the rear end of the shell to form a friction plate mounting cavity;
The fixed shaft is arranged at the rear end of the fixed sleeve and is arranged in the shaft sleeve I through an axially arranged key and a key slot;
the end cover frame comprises an end cover and an end cover shaft, and the end cover seals the front end of the shell;
the end cover shaft comprises a spline section and a smooth section for connecting the spline section and the end cover shaft, the end cover shaft penetrates through the shell and stretches into the fixed sleeve, and the rear end of the end cover shaft is connected with the fixed sleeve;
The friction plate group comprises a plurality of movable friction plates and static friction plates which are arranged in the friction plate mounting cavity, and the movable friction plates and the static friction plates are alternately sleeved on the spline section;
The dynamic friction plate is a circular plate with a clamping plate at the outer edge, and the clamping plate is clamped into the open slot;
the static friction plate is a circular plate with a spline groove at the inner edge, and the spline groove is matched with the spline section;
The piston is arranged on the smooth section in a sliding penetrating way and comprises a piston head and a piston column, a spring seat is sleeved outside the piston column, and the piston head and the spring seat are both positioned in the piston mounting hole I;
the springs I are arranged between the spring seat and the piston head, two ends of the springs I are respectively connected with the spring seat and the piston head, and the springs I apply force to the piston to enable the piston column to pass through the piston mounting hole II to press the friction plate group.
5. The rear clamping assembly of a drilling machine according to claim 4, wherein a sealing gasket I is sleeved on a spline section between the friction plate group and the shell, and a spline groove matched with the spline section is formed in the inner edge of the sealing gasket I;
a sealing gasket II is sleeved on the smooth section between the sealing gasket I and the piston column, and a sealing gasket mounting hole for mounting the sealing gasket II is formed in the shell.
6. The rear clamping assembly of the drilling machine according to claim 5, wherein an ejector pin hole is formed in the rear end of the end cover shaft, the flexible ejector pin is connected with the ejector pin hole through a spring II, and the rear end of the flexible ejector pin is in contact with the fixed sleeve.
7. The drilling machine rear clamping assembly according to claim 4, wherein an input device connecting disc is connected to the rear end of the inner gear ring, and the input device connecting disc is rotatably connected with the shaft sleeve II.
8. The drill rear clamping assembly of claim 4 wherein the end cap is provided with a vent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110104440.1A CN112576209B (en) | 2021-01-26 | 2021-01-26 | Rear clamping assembly of drilling machine |
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| CN202110104440.1A CN112576209B (en) | 2021-01-26 | 2021-01-26 | Rear clamping assembly of drilling machine |
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| CN112576209B true CN112576209B (en) | 2024-06-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113482551B (en) * | 2021-07-21 | 2024-06-28 | 辽宁工程技术大学 | Propulsion device of built-in flexible steel pipe of multipurpose mining drilling rod |
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|---|---|---|---|---|
| US4743055A (en) * | 1985-07-19 | 1988-05-10 | Brissonneau Et Lotz Marine | Automatic gripper for gripping and holding a rod, especially on a drilling rig |
| JPH0567694U (en) * | 1992-02-12 | 1993-09-07 | 三菱重工業株式会社 | Bowling machine |
| CN106321020A (en) * | 2016-10-19 | 2017-01-11 | 宁夏天地奔牛实业集团有限公司 | Automatic slip assembling and disassembling device for raise boring machine |
| CN106499354A (en) * | 2016-03-14 | 2017-03-15 | 徐工集团工程机械股份有限公司 | Slip system and rig |
| CN214221120U (en) * | 2021-01-26 | 2021-09-17 | 山西金鼎高宝钻探有限责任公司 | Rear clamping assembly of drilling machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10407991B2 (en) * | 2014-09-09 | 2019-09-10 | The Charles Machine Works, Inc. | Drill string rotation brake |
-
2021
- 2021-01-26 CN CN202110104440.1A patent/CN112576209B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4743055A (en) * | 1985-07-19 | 1988-05-10 | Brissonneau Et Lotz Marine | Automatic gripper for gripping and holding a rod, especially on a drilling rig |
| JPH0567694U (en) * | 1992-02-12 | 1993-09-07 | 三菱重工業株式会社 | Bowling machine |
| CN106499354A (en) * | 2016-03-14 | 2017-03-15 | 徐工集团工程机械股份有限公司 | Slip system and rig |
| CN106321020A (en) * | 2016-10-19 | 2017-01-11 | 宁夏天地奔牛实业集团有限公司 | Automatic slip assembling and disassembling device for raise boring machine |
| CN214221120U (en) * | 2021-01-26 | 2021-09-17 | 山西金鼎高宝钻探有限责任公司 | Rear clamping assembly of drilling machine |
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| CN112576209A (en) | 2021-03-30 |
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