CN210255964U - Pin puller - Google Patents
Pin puller Download PDFInfo
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- CN210255964U CN210255964U CN201921223465.8U CN201921223465U CN210255964U CN 210255964 U CN210255964 U CN 210255964U CN 201921223465 U CN201921223465 U CN 201921223465U CN 210255964 U CN210255964 U CN 210255964U
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Abstract
The utility model relates to a mining auxiliary assembly, concretely relates to pin puller is applied to colliery hydraulic support in pit, belongs to mining equipment technical field. The support device is fixed with one end of a cylinder body of the hydraulic cylinder through a flange plate; a through hole is formed in the center of the interior of the cylinder body, a pull rod shaft is sleeved in the through hole, penetrates through the cylinder body, penetrates through the center of the supporting device and extends into the pin shaft; a piston cavity is arranged in the cylinder at the two sides of the through hole, and the piston is arranged in the cavity; the cylinder body is provided with an oil through hole which is communicated to the cavity of the piston; a holding expansion head matched with the inclined plane is arranged between the inner walls of the pistons, a groove is also arranged on the inner wall at the outer end of the piston, and a retaining ring is inserted in the groove; a spring is arranged on the clasping expansion head; the device has the advantages of saving working space, being high in pin pulling efficiency, being completely suitable for the working condition requirement of limited space range in the underground coal mine, completely replacing manual brute force pin pulling, and improving the pin pulling safety factor.
Description
Technical Field
The utility model relates to a mining auxiliary assembly specifically is to a pin puller relates to a colliery is hydraulic support in pit, belongs to mining equipment technical field.
Background
Coal mine underground mining operations typically require large hydraulic supports. Because the height and the weight of the hydraulic support are huge, all the parts need to be connected by the pin shaft, and the size and the weight of the pin shaft are also huge. When the hydraulic support needs to be lifted up for maintenance, the large pin shaft needs to be disassembled; however, in the face of such a heavy pin shaft, manual brute force is used for dismantling the pin shaft, so that the efficiency is low, and meanwhile, potential safety hazards may occur. If mechanical dismantling is adopted, the space range in the underground coal mine wall is limited, the length of the pin shaft is long, the occupied space of the machine part is large, and if the pin shaft needs to be completely dismantled, the limited underground space range cannot meet the working condition requirement.
Disclosure of Invention
In view of the technical defect who exists, the utility model aims at providing a convenient to use, the occupation of land space is little, pulls out the formula of getting pin puller that round pin is efficient, factor of safety is high and be applicable to colliery limited space scope operating mode demand completely in the pit.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a pin puller comprises a hydraulic cylinder and a supporting device arranged on one side of the hydraulic cylinder, wherein the supporting device is fixed with one end of a cylinder body of the hydraulic cylinder through a flange plate; a through hole is formed in the center of the interior of the cylinder body, a pull rod shaft is sleeved in the through hole, penetrates through the cylinder body, penetrates through the center of the supporting device and extends into the pin shaft; a piston cavity is arranged in the cylinder at the two sides of the through hole, and the piston is arranged in the cavity; the cylinder body is provided with an oil through hole which is communicated to the cavity of the piston;
the end part of the piston is of an inclined surface structure with a taper on the inner wall; a holding expansion head matched with the inclined plane is arranged between the inner walls of the pistons, and the holding expansion head is arranged on the pull rod shaft in a penetrating way; the inner wall of the outer end of the piston is also provided with a groove, and a stop ring is inserted into the groove; a spring is arranged on the clasping expansion head;
the supporting device is provided with an observation window hole;
the number of the oil through holes is 2, the oil through holes are respectively a first oil through hole and a second oil through hole, and the first oil through hole and the second oil through hole provide hydraulic oil for a two-way path of the piston;
the clasping expansion head comprises a taper ring part and a straight ring part; the taper ring is of an annular structure formed by enclosing a plurality of holding unit pieces, and the straight section ring is formed by enclosing a plurality of unit pieces and is wound on the pull rod shaft;
the outer diameter of the straight section ring is smaller than that of the outer end of the taper ring; at the connecting position of the taper ring and the straight section ring, the outer end surface of the taper ring forms a flange of the straight section ring;
furthermore, the spring is wound on a straight section ring of the holding expansion head, one end of the spring is close to the blocking edge, and the other end of the spring is in direct contact with the blocking ring;
the spring is arranged between the retaining edge of the straight section ring of the holding expansion head and the retaining ring in a pre-tightening pressure state, so that the pre-tightening force of the holding expansion head on the pull rod shaft is always given by the spring; and waste strokes formed between the holding expansion head and the pull rod shaft and between the holding expansion head and the inner wall of the piston in the pin pulling process are avoided.
When the pin is pulled out, hydraulic oil is introduced into the hydraulic cylinder from the first oil through hole, the piston is moved outwards under the hydraulic action in the cylinder body, and the tightly-holding expansion head is locked on the pull rod shaft and drives the pull rod shaft to move out of the pin shaft by one stroke through the contact of the inclined plane of the inner wall of the end head of the piston and the outer surface of the tightly-holding expansion head in the moving process; after moving out a stroke, hydraulic oil is introduced through the second oil passage hole, the piston is pushed to retreat by pressure in the cylinder body, and at the moment of starting to retreat, the inclined surface of the inner wall of the piston is separated from the outer surface of the tightly-holding expansion head, namely, the tightly-holding expansion head is changed from a locked state to a tightly-holding state under the action of the pre-tightening force of a spring on the pull rod shaft, so that the tightly-holding expansion head slides to retreat from the pull rod shaft, and a pull-out stroke of the pin shaft driven by the pull rod shaft; after the piston completely retreats, the locking of the tightly-holding expansion head on the pull rod shaft is completed according to the first pulling-out stroke, and the pulling-out stroke of the second pin shaft is completed; and by analogy, circulating a plurality of pulling strokes to form the pull-in type pin pulling work, and finally completely pulling the pin shaft out of the workpiece.
After the pin shaft is completely pulled out of the workpiece, the pull rod shaft is still left in the hydraulic cylinder and is in a holding state of holding the expansion head, at the moment, the pull rod shaft cannot be taken out under the condition that the acting force of the hydraulic cylinder is lost, in order to take the pull rod shaft out of the hydraulic cylinder, further, a hand pull ring is arranged on the surface of the outer end of the straight section ring of the holding expansion head in a surrounding mode, a locking ring is further arranged on the straight section ring of the holding expansion head positioned at the outer end of the hand pull ring, and the locking ring is used for locking the hand pull ring and preventing the hand pull ring from falling off.
When the pull rod shaft is taken out, the hand pull ring is pulled to move outwards, the hand pull ring drives the holding expansion head to separate from the inclined plane of the inner wall of the piston, the holding expansion head expands, and at the moment, the pull rod shaft loses the holding force of the holding expansion head, so that the pull rod shaft is separated from the pin shaft and is taken out of the hydraulic cylinder.
Additionally, the utility model discloses at the pull pin in-process, in order to avoid the piston to hold tightly when reciprocating motion and rise the head and probably drive the pull rod axle and carry out the condition of reversing into, still be equipped with stop device in the outside jar that is close to the pneumatic cylinder direction of strutting arrangement, stop device includes the hinge that sets up with the pull rod axle is mutually perpendicular, and the hinge setting is in one side of pull rod axle, and both ends are equipped with an articulated loop of ring locating on the hinge respectively about the hinge, are connected with the separation blade of folding paper on the articulated loop, the separation blade center of folding paper is equipped with the through-hole, and in the through-hole of separation blade of folding paper was worn to locate by the pull rod axle, was equipped with spring an between.
When the spring is in a non-telescopic state, the arrangement of an inclination angle between the folding catch and the pull rod shaft is ensured, at the moment, the limiting device is in a locking state, at the moment, the pull rod shaft is in contact with the inner wall of the through hole of the folding catch, and even if the piston returns, the pull rod shaft cannot be driven to reversely advance by the pull rod shaft when the tightly-holding expansion head can drive the pull rod shaft to return;
when the piston moves outwards to drive the tightening expansion head to lock the pull rod shaft and pull the pull rod shaft outwards, the pull rod shaft drives the folding catch to swing, the spring is in a compressed state at the moment, the pull rod shaft is released from blocking at the inner wall of the through hole, and the pull rod shaft can pass through the through hole, so that the pull rod shaft only can move outwards.
The utility model discloses a pin puller adopts the formula of marching to get pin pulling mode, can save working space, and pin pulling is efficient, is applicable to the colliery limited space scope operating mode demand in the pit entirely, has replaced artifical brute force pin pulling completely, improves pin pulling safety coefficient.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a perspective view of fig. 1.
Fig. 4 is a right side view of fig. 1.
Fig. 5 is a rear view of fig. 1.
Fig. 6 is an enlarged view of a portion of the structure of fig. 1.
Fig. 7 is a structural diagram of the pin aligner piston in a moving state.
Fig. 8 is a structure view of the holding expansion head of the pin aligning device.
Fig. 9 is a perspective view of fig. 7.
Fig. 10 is a partially enlarged view of fig. 2.
In the figure, 1, a hydraulic cylinder body, 2, a supporting device, 3, an observation window hole, 4, a pull rod shaft, 5, a pin shaft, 6, a piston, 7, a first oil through hole, 8, a second oil through hole, 9, a holding expansion head, 10, a retaining ring, 11, a spring, 9-1, a taper ring part of the holding expansion head, 9-2, a straight ring part of the holding expansion head, 12, a retaining edge, 13, a hand ring, 14, a hinge shaft, 15, a hinge ring, 16, a folding retaining sheet, 17 and a spring a.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-10, a pin puller comprises a hydraulic cylinder and a support device 2 arranged on one side of the hydraulic cylinder, wherein the support device 2 is fixed with one end of a cylinder body 1 of the hydraulic cylinder through a flange; a through hole is formed in the center of the interior of the cylinder body 1, a pull rod shaft 4 is sleeved in the through hole, and the pull rod shaft 4 penetrates through the cylinder body 1, penetrates through the center of the supporting device 2 and extends into the pin shaft 5; the cylinder 1 positioned at the two sides of the through hole is provided with a piston cavity, and a piston 6 is arranged in the cavity; an oil through hole is formed in the cylinder body 1 and communicated to the cavity of the piston;
the end part of the piston 6 is of an inclined plane structure with a taper on the inner wall; a holding expansion head 9 matched with the inclined plane is arranged between the inner walls of the pistons 6, and the holding expansion head 9 is arranged on the pull rod shaft 4 in a penetrating way; a groove is also arranged on the inner wall of the outer end of the piston 6, and a baffle ring 10 is inserted in the groove; the clasping expansion head 9 is provided with a spring 11;
the supporting device 2 is provided with an observation window hole 3;
the number of the oil through holes is 2, the oil through holes are respectively a first oil through hole 7 and a second oil through hole 8, and the first oil through hole 7 and the second oil through hole 8 provide hydraulic oil for a two-way path of the piston 6;
the clasping expansion head 9 comprises a taper ring part 9-1 and a straight-section ring part 9-2; the taper ring 9-1 is an annular structure formed by enclosing a plurality of holding unit pieces, and the straight section ring 9-2 is formed by enclosing a plurality of unit pieces and is wound on the pull rod shaft 4;
the outer diameter of the straight section ring 9-2 is smaller than the outer diameter of the outer end of the taper ring 9-1; at the joint position of the taper ring 9-1 and the straight section ring 9-2, the outer end surface of the taper ring 9-1 forms a flange 12 of the straight section ring 9-2;
furthermore, the spring 11 is wound on the straight ring 9-2 of the holding expansion head 9, one end of the spring 11 is close to the flange 12, and the other end of the spring 11 is in direct contact with the baffle ring 10;
the spring 11 is arranged between the retaining ring 10 and the straight section ring retaining side 12 of the holding expansion head in a pre-tightening pressure state, so that the spring 11 is ensured to always give pre-tightening force to the holding expansion head 9 on the pull rod shaft 4; the waste stroke formed between the holding expansion head 9 and the pull rod shaft 4 and between the holding expansion head 9 and the inner wall of the piston 6 in the pin pulling process is avoided.
When the pin is pulled out, hydraulic oil is introduced into the hydraulic cylinder from the first oil through hole 7, the piston 6 is moved outwards in the cylinder body 1 under the hydraulic action, and the tightly-holding expansion head 9 is locked on the pull rod shaft 4 and drives the pull rod shaft 4 to move out of the pin shaft 5 by one stroke through the tangency of the inclined surface of the inner wall of the end of the piston 6 and the outer surface of the tightly-holding expansion head 9 in the moving process; after moving out a stroke, hydraulic oil is introduced through the second oil passage hole 8, the pressure in the cylinder body 1 pushes the piston 6 to retreat, and at the moment of retreating, the inclined surface of the inner wall of the piston 6 is separated from the outer surface of the tightly holding expansion head 9, namely, the tightly holding expansion head 9 is changed from a locking state to a locking state under the action of the pre-tightening force of a spring on the pull rod shaft 4, so that the tightly holding expansion head 9 retreats from the pull rod shaft 4 in a sliding manner, and a pull-out stroke of the pin shaft 5 driven by the pull rod shaft 4 is completed; after the piston 6 completely retreats, the locking of the tightly-holding expansion head 9 on the pull rod shaft 4 is completed according to the first pulling-out stroke, and the pulling-out stroke of the second pin shaft is completed; and by analogy, circulating a plurality of pulling strokes to form the pull-in type pin pulling work, and finally completely pulling the pin shaft 5 out of the workpiece.
After the pin shaft 5 is completely pulled out from the workpiece, the pull rod shaft 4 is still left in the hydraulic cylinder and is in a tightly holding state of the tightly holding expansion head, at this time, the pull rod shaft 4 cannot be taken out under the condition that the acting force of the hydraulic cylinder is lost, in order to take the pull rod shaft 4 out of the hydraulic cylinder, further, a hand pull ring 13 is arranged on the surface of the outer end of the straight section ring 9-2 of the tightly holding expansion head in a surrounding mode, a locking ring is further arranged on the straight section ring 9-2 of the tightly holding expansion head, the locking ring is used for locking the hand pull ring 13, and the hand pull ring 13 is prevented from falling off from the tightly holding expansion head 9.
When the pull rod shaft 4 is taken out, the hand ring 13 is pulled to move outwards, the hand ring 13 drives the holding expansion head 9 to separate from the inclined plane of the inner wall of the piston 6, the holding expansion head 9 expands, and at the moment, the pull rod shaft 4 loses the holding force of the holding expansion head 9, so that the pull rod shaft 4 is separated from the pin shaft 5 and is taken out from the hydraulic cylinder.
Additionally, the utility model discloses at the pull out round pin in-process, in order to avoid piston 6 to hold tightly when reciprocating motion the head 9 that rises probably to drive pull rod shaft 4 and carry out the condition of reversing into, still be equipped with stop device in the jar that is close to the pneumatic cylinder direction in strutting arrangement 2 outside, stop device includes the hinge 14 with pull rod shaft 4 looks perpendicular setting, and hinge 14 sets up in one side of pull rod shaft 4, and both ends are equipped with a hinge 15 of encircleing on hinge 14 respectively about hinge 14, are connected with folding blade 16 on the hinge 15, folding blade 16 center is equipped with the through-hole, and pull rod shaft 4 is worn to locate in folding blade 16's the through-hole, is equipped with spring a17 between folding blade 16 and the cylinder body 1 center through-hole edge wall.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (8)
1. A pin puller is characterized in that: the support device is fixed with one end of a cylinder body of the hydraulic cylinder through a flange plate; a through hole is formed in the center of the interior of the cylinder body, a pull rod shaft is sleeved in the through hole, penetrates through the cylinder body, penetrates through the center of the supporting device and extends into the pin shaft; a piston cavity is arranged in the cylinder at the two sides of the through hole, and the piston is arranged in the cavity; the cylinder body is provided with an oil through hole which is communicated to the cavity of the piston; the end part of the piston is of an inclined surface structure with a taper on the inner wall; a holding expansion head matched with the inclined plane is arranged between the inner walls of the pistons, and the holding expansion head is arranged on the pull rod shaft in a penetrating way; the inner wall of the outer end of the piston is also provided with a groove, and a stop ring is inserted into the groove; the clasping expansion head is provided with a spring.
2. A pin puller as set forth in claim 1, wherein: the oil through holes are 2 and are respectively a first oil through hole and a second oil through hole, and the first oil through hole and the second oil through hole provide hydraulic oil for a two-way path of the piston.
3. A pin puller as set forth in claim 1, wherein: the clasping expansion head comprises a taper ring part and a straight ring part; the taper ring is of an annular structure formed by enclosing a plurality of holding unit pieces, and the straight section ring is formed by enclosing a plurality of unit pieces and is wound on the pull rod shaft.
4. A pin puller as set forth in claim 3, wherein: the outer diameter of the straight section ring is smaller than that of the outer end of the taper ring; and at the joint position of the taper ring and the straight section ring, the outer end surface of the taper ring forms a flange of the straight section ring.
5. A pin puller as set forth in claim 3, wherein: the spring is wound on a straight section ring arranged on the holding expansion head, one end of the spring is close to the blocking edge, and the other end of the spring is in direct contact with the blocking ring.
6. A pin puller as set forth in claim 5, wherein: the spring is arranged between the retaining edge of the straight section ring of the holding expansion head and the retaining ring in a pre-tightening pressure state.
7. A pin puller as set forth in claim 6, wherein: the surface of the outer end of the straight section ring of the holding expansion head is provided with a hand pull ring in a surrounding manner, and the straight section ring of the holding expansion head positioned at the outer end of the hand pull ring is also provided with a locking ring.
8. A pin puller as set forth in claim 1, wherein: still be equipped with stop device in the cylinder of the supporting device outside being close to the pneumatic cylinder direction, stop device includes the hinge that sets up with the pull rod axle is perpendicular, and the hinge setting is in one side of pull rod axle, and both ends are equipped with a ring respectively about the hinge and locate the hinge on the hinge, are connected with the separation blade of folding paper on the hinge, the separation blade center of folding paper is equipped with the through-hole, and in the through-hole of separation blade of folding paper was worn to locate by the pull rod axle, be equipped with spring an between separation blade of folding paper and to cylinder body center through-hole edge wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921223465.8U CN210255964U (en) | 2019-07-31 | 2019-07-31 | Pin puller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921223465.8U CN210255964U (en) | 2019-07-31 | 2019-07-31 | Pin puller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210255964U true CN210255964U (en) | 2020-04-07 |
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ID=70013569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921223465.8U Active CN210255964U (en) | 2019-07-31 | 2019-07-31 | Pin puller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210255964U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253495A (en) * | 2019-07-31 | 2019-09-20 | 大连宏远气动液压船舶辅机有限公司 | Pin removal |
| WO2023102067A1 (en) * | 2021-11-30 | 2023-06-08 | Enerpac Tool Group Corp. | Pin puller assembly and methods |
-
2019
- 2019-07-31 CN CN201921223465.8U patent/CN210255964U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253495A (en) * | 2019-07-31 | 2019-09-20 | 大连宏远气动液压船舶辅机有限公司 | Pin removal |
| CN110253495B (en) * | 2019-07-31 | 2023-12-15 | 大连宏远气动液压船舶辅机有限公司 | Pin puller |
| WO2023102067A1 (en) * | 2021-11-30 | 2023-06-08 | Enerpac Tool Group Corp. | Pin puller assembly and methods |
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