Puller for hydraulic coupler maintenance

Abstract

The invention relates to the technical field of hydraulic coupler maintenance equipment, and discloses a puller for hydraulic coupler maintenance, which comprises a hydraulic oil cylinder and a connecting sleeve, a screw rod is mounted in the hydraulic oil cylinder in a threaded manner, the connecting sleeve is sleeved outside the screw rod, a threaded sleeve is arranged in the connecting sleeve, and the threaded sleeve is sleeved outside the threaded sleeve. The threaded sleeve extends outwards from the end, away from the hydraulic oil cylinder side, of the connecting sleeve, the threaded sleeve is detachably connected with the connecting sleeve, the end, close to the connecting sleeve side, of the lead screw movably penetrates into the threaded sleeve, and an ejector rod with the variable length is arranged at the end, penetrating into the threaded sleeve, of the lead screw. The ejector rod extends out of the threaded sleeve; the connecting sleeve and the threaded sleeve are detachably connected, so that threads on the threaded sleeve can be replaced when damaged, the ejector rod with the variable length is arranged on the lead screw, the hydraulic coupler disassembling tool can adapt to disassembling work of hydraulic couplers of different models, and the hydraulic coupler disassembling tool has the advantages that the use cost is reduced, use is convenient, and the disassembling efficiency is improved.

Description

Technical Field

[0001] The invention relates to a puller for repairing a hydraulic coupler, and belongs to the technical field of hydraulic coupler repair equipment. Background Art

[0002] A hydraulic coupler, also known as a hydraulic coupling, is a hydraulic transmission device that uses liquid kinetic energy to transfer energy. It mainly achieves the conversion between mechanical energy and liquid kinetic energy through the interaction between the pump wheel and the turbine, thereby connecting the prime mover and the working machine to achieve the purpose of power transmission. A puller is a tool specifically used to disassemble and install a hydraulic coupler. It installs the threaded end of the connection module into the disassembly hole of the hydraulic coupler, and then uses a hydraulic cylinder to push the push rod inside the connection module to generate pure axial thrust to tighten the main shaft, allowing the connection module to generate a reaction force to pull the hydraulic coupler, thereby helping technicians to easily complete the disassembly and assembly of the coupler. It has the characteristics of easy installation and simple operation. The puller is one of the indispensable tools for repairing hydraulic couplers.

[0003] At present, most of the connection modules in common pullers are cast as one piece, such as the invention patent application with Chinese patent publication number CN104227652A, which discloses a puller special for hydraulic coupling, including a puller base plate, an adjusting screw, and a puller head. The two ends of the adjusting screw are respectively fixedly connected to the puller base plate and the puller head. The puller head includes a head base, a column with external threads fixedly connected to the head base, and a center hole of the head passes through the head base and the column. The connection module in this special puller, that is, the puller head and the puller head base are cast as one piece. After long-term use, the threads on the connecting module of this type of special puller are damaged by stress, which will make it impossible to install it into the disassembly hole to connect the hydraulic coupler. At this time, the entire connecting module needs to be replaced before it can be installed in the disassembly hole, which will cause a large amount of spare parts to be wasted and increase the use cost of the puller. At the same time, due to the different models of hydraulic couplers, the distance between the bearing position of the hydraulic coupler and the shaft section varies in depth, and the length of the push rod on the existing puller is mostly fixed, so only the hydraulic coupler at a fixed depth position can be disassembled, and the hydraulic coupler at a different depth position cannot be disassembled. When in use, it is necessary to carry push rods of different lengths to disassemble the hydraulic coupler at different depths, which is more inconvenient to use. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a puller for repairing a hydraulic coupling.

[0005] The technical solution of the present invention is as follows: A puller for repairing a hydraulic coupler comprises a hydraulic cylinder and a connecting sleeve, wherein a screw rod is installed on the internal thread of the hydraulic cylinder, the connecting sleeve is installed on the end face of the output end of the hydraulic cylinder and sleeved on the outside of the screw rod, a threaded sleeve is arranged inside the connecting sleeve, the threaded sleeve extends outward from the end of the connecting sleeve away from the hydraulic cylinder side, and the threaded sleeve and the connecting sleeve are detachably connected, the end of the screw rod close to the connecting sleeve side is movably inserted into the threaded sleeve, and a push rod with variable length is arranged on the end of the screw rod inserted into the threaded sleeve, and the push rod is arranged to extend out of the threaded sleeve.

[0006] Furthermore, an anti-rotation groove is provided inside the connecting sleeve, and a limiting tooth plate adapted to the anti-rotation groove is provided on the end of the threaded sleeve close to the connecting sleeve, and the limiting tooth plate is movably installed inside the anti-rotation groove.

[0007] Furthermore, a through opening is provided on the end of the connecting sleeve away from the hydraulic cylinder side, the through opening is connected to the anti-rotation tooth groove, the threaded sleeve is arranged to pass through the through opening, and the end surface area of ​​the limiting tooth plate is arranged to be larger than the opening area of ​​the through opening.

[0008] Furthermore, a limiting cylinder surrounding the outside of the through opening is arranged on the end of the connecting sleeve away from the hydraulic cylinder side, the threaded sleeve is arranged to penetrate the limiting cylinder, the outer wall of the threaded sleeve is provided with a placement groove, and a first limiting bead is elastically installed in the placement groove by setting a spring, and a first clamping groove adapted to the first limiting bead is opened on the inner wall of the limiting sleeve, and the first limiting bead is clamped and installed in the inside of the first clamping groove.

[0009] Furthermore, the push rod includes a top seat, a first connecting seat and a second connecting seat which are arranged in sequence in the direction close to the screw rod. The top seat is threadedly installed at one end of the first connecting seat. A threaded barrel is arranged on the side wall of the second connecting seat away from the first connecting seat. The threaded barrel is threadedly installed inside the screw rod. A threaded rod is arranged on the side wall of the first connecting seat close to the second connecting seat. The threaded rod is threadedly installed inside the second connecting seat and movably passes through the second connecting seat and extends to the inner cavity of the threaded barrel.

[0010] Furthermore, a threaded column is provided on the side wall of the top seat close to the first connecting seat, a first threaded groove is provided inside the first connecting seat, and the threaded column is threadedly installed inside the first threaded groove.

[0011] Furthermore, a second thread groove is opened inside the second connecting seat, and the threaded rod is threadedly installed in the second thread groove. Two first locking nuts are threadedly installed on the outer wall of the threaded rod. The two first locking nuts are tightly attached to the side wall of the second connecting seat away from the threaded tube side in sequence, and the internal thread directions of the two first locking nuts are also set in opposite directions.

[0012] Furthermore, a third thread groove is opened inside the screw rod, and the threaded barrel is threadedly installed inside the screw rod by threaded connection with the third thread groove. Two second locking nuts are threadedly installed on the outer wall of the threaded barrel. The two second locking nuts are tightly attached to the side wall of the screw rod close to the threaded barrel in sequence, and the internal thread directions of the two second locking nuts are also set in opposite directions.

[0013] Furthermore, a second limit bead is elastically mounted on the output end of the hydraulic cylinder, a second slot adapted to the second limit bead is provided on the side wall of the connecting sleeve, and the second limit bead is snap-fitted and mounted inside the second slot.

[0014] Furthermore, a rotating handle is provided on one end portion of the screw rod.

[0015] The present invention has the following beneficial effects: 1. The present invention provides a threaded sleeve on the connecting sleeve, and the threaded sleeve and the connecting sleeve are detachably connected. When the threaded sleeve needs to be installed on the connecting sleeve, the threaded sleeve is inserted into the anti-rotation tooth groove from the end of the connecting sleeve close to the hydraulic cylinder side, and the limiting tooth plate enters the anti-rotation tooth groove. Then, the threaded sleeve is slid along the anti-rotation tooth groove under the action of the limiting tooth plate, so that it extends out of the connecting sleeve from the through opening. At this time, since the limiting tooth plate cannot pass through the through opening, the threaded sleeve cannot fall out of the through opening. Then, the first limiting clamping bead on the outer wall of the threaded sleeve is clamped in the first clamping groove on the inner wall of the limiting cylinder under the action of the spring to lock the threaded sleeve. The position of the tube can be limited to complete the installation of the threaded sleeve. When the thread on the threaded sleeve is damaged, the first limit bead is pressed inward to make the first limit bead leave the first groove. At this time, relative movement can occur between the threaded sleeve and the connecting sleeve, that is, the threaded sleeve can be removed from the connecting sleeve. Compared with the prior art, the threaded sleeve on the connecting sleeve can be replaced separately, avoiding the situation that the entire connecting module needs to be replaced before it can be installed in the disassembly hole to disassemble the hydraulic coupling due to the force damage of the thread on the connecting module, reducing the waste of spare parts. Compared with the prior art, it has the advantage of reducing the use cost.

[0016] 2. The present invention connects the connecting sleeve and the threaded sleeve detachably so that the threaded sleeve can be disassembled separately. When faced with different types of hydraulic couplers, the operator can replace the threaded sleeve with a corresponding caliber thread according to the caliber of the disassembly hole on the hydraulic coupler, so as to be applicable to the disassembly work of hydraulic couplers of different types, and has the advantage of strong applicability.

[0017] 3. The present invention provides a push rod with variable length on one side end of the screw rod. The combination of the push rod and the screw rod is the push rod in the prior art. By twisting the first connecting seat, the threaded rod installed thereon can be driven to rotate in the second thread groove. By changing the length of the threaded rod extending out of the threaded barrel, the distance between the first connecting seat and the second connecting seat can be adjusted to change the overall length of the push rod. By twisting the second connecting seat, the threaded barrel installed thereon can be driven to rotate in the third thread groove. By changing the length of the threaded barrel extending out of the screw rod, the distance between the second connecting seat and the screw rod can be adjusted, and the overall length of the push rod can also be changed. Compared with the prior art, it can be suitable for the disassembly of hydraulic couplers at different depths, and there is no need to carry push rods of multiple different lengths. Compared with the prior art, it has the advantages of easy use and improved disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the connecting sleeve in the present invention; Figure 3 It is a structural schematic diagram of the threaded casing in the present invention; Figure 4 It is a schematic diagram of the connection between the connecting sleeve and the threaded sleeve in the present invention; Figure 5 It is a schematic diagram of the structure of the jacking pipe in the present invention.

[0019] The reference numerals in the figure are as follows: 1. Hydraulic cylinder; 2. Connecting sleeve; 3. Screw rod; 4. Threaded sleeve; 5. Ejector rod; 501. Ejector seat; 502. First connecting seat; 503. Second connecting seat; 504. Threaded barrel; 505. Threaded rod; 506. Threaded column; 507. First thread groove; 508. Second thread groove; 509. First locking nut; 510. Third thread groove; 511. Second locking nut; 6. Anti-rotation tooth groove; 7. Limit tooth plate; 8. Through port; 9. Limit cylinder; 10. Placement slot; 11. Spring; 12. First limit bead; 13. First slot; 14. Second limit bead; 15. Second slot; 16. Rotating handle. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the term "includes" and any variations thereof are intended to cover non-exclusive inclusions. The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example: Please refer to Figures 1 to 5 The present embodiment provides a puller for repairing a hydraulic coupler, comprising a hydraulic cylinder 1 and a connecting sleeve 2. A screw rod 3 is installed on the internal thread of the hydraulic cylinder 1. The connecting sleeve 2 is installed on the end surface of the output end of the hydraulic cylinder 1 and sleeved on the outside of the screw rod 3. A threaded sleeve 4 is movably provided inside the connecting sleeve 2. One side of the threaded sleeve 4 extends outward from the end of the connecting sleeve 2 away from the hydraulic cylinder 1. The extended end of the threaded sleeve 4 is used for subsequent threaded installation inside the disassembly hole of the hydraulic coupler. The end of the screw rod 3 close to the connecting sleeve 2 is movably poured into the threaded sleeve 4. The end of the screw rod 3 that penetrates into the threaded sleeve 4 is provided with a mandrel 5 of variable length. The mandrel 5 extends out of the threaded sleeve 4.

[0022] In order to facilitate the corresponding replacement work when the thread of the threaded sleeve 4 is damaged, in this embodiment, the threaded sleeve 4 is detachably connected to the connecting sleeve 2. Specifically, an anti-rotation tooth groove 6 is provided inside the connecting sleeve 2, and a limiting tooth plate 7 that is adapted to the anti-rotation tooth groove 6 is provided on the end of the threaded sleeve 4 close to the connecting sleeve 2. The limiting tooth plate 7 is movably installed inside the anti-rotation tooth groove 6. Under the action of the limiting tooth plate 7, the threaded sleeve 4 can slide along the anti-rotation tooth groove 6 to facilitate installation and disassembly. A through opening 8 is also provided on the end of the connecting sleeve 2 away from the hydraulic cylinder 1 side, and the through opening 8 is connected to the anti-rotation tooth groove 6. The threaded sleeve 4 is arranged to pass through the through opening 8, and the end surface area of ​​the limiting tooth plate 7 is arranged to be larger than the opening area of ​​the through opening 8, so that the limiting tooth plate 7 cannot pass through the through opening 8, so as to prevent the threaded sleeve 4 from falling out from the end of the connecting sleeve 2 away from the hydraulic cylinder 1 side. A limiting cylinder 9 surrounding the outside of the through opening 8 is provided on the end of the connecting sleeve 2 away from the hydraulic cylinder 1 side, and the threaded sleeve 4 is arranged to pass through the limiting cylinder 9. The specific length of the threaded sleeve 4 extending out of the limiting cylinder 9 can be determined according to actual conditions so as to meet the requirement of being able to be threadedly installed inside the disassembly hole of the hydraulic coupler later. The outer wall of the threaded sleeve 4 is provided with symmetrical placement grooves 10, and a first limit clamping bead 12 is elastically installed in each placement groove 10 by means of a spring 11. The inner wall of the limit tube 9 is provided with a first clamping groove 13 which is adapted to the first limit clamping bead 12, and the first limit clamping beads 12 on both sides are clamped and installed in the corresponding first clamping grooves 13. When the first limit clamping beads 12 on both sides are clamped and installed in the corresponding first clamping grooves 13, the threaded sleeve 4 can be fixed with the limit tube 9, that is, it can be fixed in position with the connecting sleeve, so as to realize the detachable connection between the threaded sleeve 4 and the connecting sleeve 2.

[0023] After the threaded sleeve 4 is installed, the threaded sleeve 4 is inserted inward from the end of the connecting sleeve 2 close to the hydraulic cylinder 1 side, and the limiting tooth plate 7 on the threaded sleeve 4 slides in the anti-rotation tooth groove 6, and then one end of the threaded sleeve 4 extends from the through opening 8 to the limiting cylinder 9, and passes through the limiting cylinder 9 to extend to its outside, and the limiting tooth plate 7 cooperates with the through opening 8 to limit the position of the threaded sleeve 4 to prevent the threaded sleeve 4 from detaching from the connecting sleeve 2. At the same time, the first limiting beads 12 on both sides installed on the outer wall of the threaded sleeve 4 are engaged in the first grooves 13 on the corresponding sides of the inner wall of the limiting cylinder 9 under the action of the spring 11, to limit the position of the threaded sleeve 4 and prevent the threaded sleeve 4 from moving back to the inside of the connecting sleeve 2, that is, the installation of the threaded sleeve 4 can be completed, and then the connecting sleeve 2 and the hydraulic coupler are connected through the threaded sleeve 4 to ensure the normal use of the connecting sleeve 2.

[0024] Since an anti-rotation groove 6 is provided inside the connecting sleeve 2, a limiting tooth plate 7 is provided on the threaded sleeve 4, and the limiting tooth plate 7 is slidably installed inside the anti-rotation groove 6, when the threaded sleeve 4 is installed into the disassembly hole of the hydraulic coupler, the cooperation between the limiting tooth plate 7 and the anti-rotation groove 6 can limit the position of the threaded sleeve 4 and prevent the threaded sleeve 4 from rotating in the connecting sleeve 2, thereby avoiding the situation where the threaded sleeve 4 cannot be installed into the disassembly hole of the hydraulic coupler due to the rotation of the threaded sleeve 4 in the connecting sleeve 2, and ensuring the normal use of the threaded sleeve 4.

[0025] When the threads on the threaded sleeve 4 are damaged and need to be replaced, the first limit beads 12 in the first slots 13 on both sides are pressed to shrink the first limit beads 12 on both sides back into the corresponding side placement grooves 10 to disengage from the limit tube 9, and then the threaded sleeve 4 is pushed to allow the threaded sleeve 4 to slide out of the connecting sleeve 2 under the action of its own gravity, thereby completing the disassembly of the threaded sleeve 4. Compared with the prior art, the threaded sleeve 4 on the connecting sleeve 2 can be replaced separately, avoiding the situation where the entire connecting module needs to be replaced before it can be installed in the disassembly hole to disassemble the hydraulic coupling due to the damage of the threads on the connecting module, thereby reducing the waste of spare parts and reducing the use cost of the puller.

[0026] When disassembling hydraulic couplers of different types, due to the detachable connection between the threaded sleeve 4 and the connecting sleeve 2, the operator can replace the threaded sleeve 4 with a thread of corresponding caliber according to the caliber of the disassembly hole on the hydraulic coupler, fix the threaded sleeve 4 with a thread of corresponding caliber on the connecting sleeve 2 and install it into the disassembly hole of the hydraulic coupler, that is, it can adapt to the disassembly of hydraulic couplers of different types, and has strong applicability.

[0027] In this embodiment, the top rod 5 includes a top seat 501, a first connecting seat 502, and a second connecting seat 503 which are arranged in sequence in the direction close to the screw rod 3. A threaded column 506 is arranged on the side wall of the top seat 501 close to the first connecting seat 502. A first thread groove 507 is opened inside the first connecting seat 502. The threaded column 506 is threadedly installed inside the first thread groove 507. The top seat 501 is connected to the first thread groove 507 through the threaded column 506 so as to be threadedly installed at one end of the first connecting seat 502. A threaded rod 505 is arranged on the side wall of the first connecting seat 502 close to the second connecting seat 503. The inside of the second connecting seat 503 A second thread groove 508 is provided, and the threaded rod 505 is threadedly installed in the second thread groove 508. The threaded rod 505 can be threadedly installed in the interior of the second connecting seat 503 by connecting with the second thread groove 508. A threaded barrel 504 is provided on the side wall of the second connecting seat 503 away from the first connecting seat 502. A third thread groove 510 is provided in the interior of the screw rod 3. The threaded barrel 504 can be threadedly installed in the interior of the screw rod 3 by threaded connection with the third thread groove 510. The threaded rod 505 can also movably pass through the second connecting seat 503 and extend into the inner cavity of the threaded barrel 504 to expand the range of change of the overall length of the push rod 5.

[0028] In order to ensure that the threaded rod 505 and the threaded barrel 504 are not prone to loosening, in this embodiment, two first locking nuts 509 are threadedly installed on the outer wall of the threaded rod 505, and the two first locking nuts 509 are sequentially tightly attached to the side wall of the second connecting seat 503 away from the threaded barrel 504, and the internal thread directions of the two first locking nuts 509 are also set in reverse. Two second locking nuts 511 are also threadedly installed on the outer wall of the threaded barrel 504, and the two second locking nuts 511 are sequentially tightly attached to the side wall of the screw rod 3 close to the threaded barrel 504, and the internal thread directions of the two second locking nuts 511 are also set in reverse. The setting of the two first locking nuts 509 can limit the position of the threaded rod 505 to prevent it from loosening, and the setting of the two second locking nuts 511 can limit the position of the threaded barrel 504 to prevent it from loosening.

[0029] Through the above-mentioned arrangement, when assembling the push rod 5, the push seat 501 can be installed on the first connecting seat 502 through the cooperation of the threaded column 506 and the first threaded groove 507, and then the two first locking nuts 509 can be screwed into the threaded rod 505, and then the threaded rod 505 on the first connecting seat 502 can be installed on the second connecting seat 503 through the second threaded groove 508, and the threaded rod 505 can be received in the inner cavity of the threaded tube 504 installed on the second connecting seat 503, and the first connecting seat 502 and the second connecting seat 503 can be assembled, and the assembly of the push rod 5 is completed, and then the two second locking nuts 511 can be screwed into the threaded tube 504, and then the threaded tube 504 can be installed into the third threaded groove 510, and the threaded tube 504 can be received in the interior of the screw rod 3, so that the push rod 5 and the screw rod 3 can be assembled together. The screw rod 3 and the push rod 5 can constitute the push rod in the prior art. In the present embodiment, by splitting the push rod into the screw rod 3 and the push rod 5, the length of the push rod is shortened, and the screw rod 3 and the push rod 5 can be carried separately, thus avoiding the inconvenience of carrying caused by the long length of the push rod occupying more transportation space, saving time and effort, and facilitating the handling work. Moreover, when various components on the push rod are damaged, the push rod 5 and the screw rod 3 can be split apart, and the top seat 501, the first connecting seat 502, the second connecting seat 503 and the screw rod 3 can be replaced separately, thus avoiding the need to replace the entire push rod for continued use, reducing the waste of resources, reducing maintenance costs, and facilitating the subsequent maintenance work.

[0030] When it is necessary to adjust the length of the push rod 5, the first connecting seat 502 is screwed to drive the threaded rod 505 installed thereon to rotate in the second thread groove 508, so that the threaded rod 505 extends out of the threaded tube 504, and the distance between the first connecting seat 502 and the second connecting seat 503 is adjusted. Then, the two first locking nuts 509 on the outer wall of the threaded rod 505 are screwed, so that the two first locking nuts 509 with opposite thread directions are successively pressed against the end surface of the second connecting seat 503, and the threaded rod 505 is tightened to prevent the threaded rod 505 from shifting after the position is adjusted. The length adjustment of the push rod 5 can be completed, so that the length of the push rod 5 can be adjusted according to the distance between the bearing position of the hydraulic coupler and the shaft section, so that the push rod 5 can disassemble the hydraulic coupler at different depths on the main shaft, so as to be suitable for the disassembly of hydraulic couplers of different models.

[0031] When adjusting the length of the push rod, the threaded barrel 504 on the second connection seat 503 is twisted to extend the third thread groove 510 from the threaded barrel 504, and the distance between the push rod 5 and the screw rod 3 is adjusted. Then, the two second locking nuts 511 on the outer wall of the threaded barrel 504 are twisted to make the two second locking nuts 511 with opposite thread directions close to the end face of the screw rod 3 in turn, and the threaded barrel 504 is tightened to prevent the displacement of the threaded barrel 504 after the position is adjusted, and the length adjustment of the push rod can be completed. By adjusting the length of the push rod, the stroke length of the push rod in the hydraulic cylinder 1 can be changed, so that the push rod is suitable for the disassembly of different types of hydraulic couplers, avoiding the trouble of carrying and replacing push rods of different lengths to disassemble hydraulic couplers with bearings at different depths due to the fixed length of the push rod, saving time and effort, and improving the disassembly efficiency.

[0032] In order to facilitate the installation of the connecting sleeve 2 and the hydraulic cylinder 1, in this embodiment, a second limit clamping bead 14 symmetrically arranged is elastically installed on the output end of the hydraulic cylinder 1, and a second clamping groove 15 adapted to the second limit clamping bead 14 is opened on the side wall of the connecting sleeve 2, and the second limit clamping beads 14 on both sides are clamped and installed in the second clamping groove 15 on the corresponding side. When the limit clamping beads on both sides are clamped and installed in the second clamping groove 15 on the corresponding side, the connecting sleeve 2 can be installed on the hydraulic cylinder 1. When the connecting sleeve 2 needs to be removed from the hydraulic cylinder 1, the second limit clamping beads 14 on both sides are pressed away from the second clamping groove 15 on the corresponding side, so that the connecting sleeve 2 can be disassembled.

[0033] In order to facilitate the rotation of the screw rod 3 , in the present embodiment, a rotation handle 16 is further provided on one end of the screw rod 3 .

[0034] The working principle of the present invention is as follows: when disassembling the hydraulic coupler on the main shaft, the connecting sleeve 2 can be installed on the end surface of the output end of the hydraulic cylinder 1, and the connecting sleeve 2 can be installed in the disassembly hole of the hydraulic coupler through the threaded sleeve 4, and then the first connecting seat 502 is screwed to drive the threaded rod 505 installed thereon to rotate in the second threaded groove 508, so that the threaded rod 505 extends out of the threaded barrel 504, and the distance between the first connecting seat 502 and the second connecting seat 503 is adjusted, and the two second threads on the outer wall of the threaded rod 505 are screwed. The first locking nut 509 is used to make the two first locking nuts 509 with opposite thread directions close to the end surface of the second connecting seat 503 in sequence, and the threaded rod 505 is tightened to prevent the threaded rod 505 from moving after the adjusted position, and the length adjustment of the push rod 5 is completed. Then, the threaded barrel 504 on the second connecting seat 503 is screwed to make the threaded barrel 504 extend out of the third thread groove 510, and the distance between the push rod 5 and the screw rod 3 is adjusted. Then, the two second locking nuts 511 on the outer wall of the threaded barrel 504 are screwed to make the two second locking nuts 511 on the outer wall of the threaded barrel 504 with opposite thread directions close to the end surface of the second connecting seat 503. The tightening nut 511 is successively pressed against the end face of the screw rod 3, and the threaded tube 504 is tightened to prevent the threaded tube 504 from being displaced after the adjusted position, so as to complete the length adjustment of the push rod. Finally, the push rod is installed into the hydraulic cylinder 1, and the screw rod 3 is threadedly installed into the interior of the hydraulic cylinder 1, and the push rod 5 installed at one end thereof after the adjusted length is pushed to pass through the connecting sleeve 2, and the threaded sleeve 4 contacts the main shaft, and then the hydraulic cylinder 1 is driven to work, so that the screw rod 3 installed in the hydraulic cylinder 1 pushes the push rod 5 to displace and generate axial force to tighten the main shaft, and let the through The connecting sleeve 2 installed in the disassembly hole through the threaded sleeve 4 generates a reaction force to pull the hydraulic coupler, so that the hydraulic coupler can be disassembled from the main shaft. The length of the push rod is adjusted according to the distance between the bearing position of the hydraulic coupler and the shaft section so that the push rod can be suitable for the disassembly of hydraulic couplers of different models, avoiding the trouble of carrying and replacing push rods of different lengths to disassemble the hydraulic couplers with the bearing positions at different depths due to the fixed length of the push rod, saving time and effort and improving the disassembly efficiency.

[0035] Moreover, when the threads on the threaded sleeve 4 are damaged due to long-term stress, the threaded sleeve 4 can be directly disassembled from the connecting sleeve 2, and the threaded sleeve 4 on the connecting sleeve 2 can be replaced separately, thereby avoiding the situation where the entire connecting module needs to be replaced before it can be installed in the disassembly hole to disassemble the hydraulic coupling due to the stress damage on the threads on the connecting module, thereby reducing the waste of spare parts and reducing the cost of use.

[0036] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A puller for repairing a hydraulic coupling, comprising a hydraulic cylinder (1) and a connecting sleeve (2), wherein a screw rod (3) is installed on the internal thread of the hydraulic cylinder (1), and the connecting sleeve (2) is installed on the end surface of the output end of the hydraulic cylinder (1) and sleeved on the outside of the screw rod (3), characterized in that: A threaded sleeve (4) is arranged inside the connecting sleeve (2), the threaded sleeve (4) protrudes outward from the end of the connecting sleeve (2) away from the hydraulic cylinder (1), and the threaded sleeve (4) is detachably connected to the connecting sleeve (2), the end of the screw rod (3) close to the connecting sleeve (2) is movably inserted into the threaded sleeve (4), and a push rod (5) with a variable length is arranged on the end of the screw rod (3) inserted into the threaded sleeve (4), and the push rod (5) is arranged to protrude from the threaded sleeve (4).

2. A puller for repairing a hydraulic coupling according to claim 1, characterized in that: The connecting sleeve (2) is provided with an anti-rotation tooth groove (6) inside, and a limiting tooth plate (7) adapted to the anti-rotation tooth groove (6) is provided on the end of the threaded sleeve (4) close to the connecting sleeve (2), and the limiting tooth plate (7) is movably mounted inside the anti-rotation tooth groove (6).

3. A puller for repairing a hydraulic coupling according to claim 2, characterized in that: A through opening (8) is also provided on the end of the connecting sleeve (2) away from the hydraulic cylinder (1), the through opening (8) is communicated with the anti-rotation tooth groove (6), the threaded sleeve (4) is arranged to penetrate the through opening (8), and the end surface area of ​​the limiting tooth plate (7) is arranged to be larger than the opening area of ​​the through opening (8).

4. A puller for repairing a hydraulic coupling according to claim 3, characterized in that: A limiting cylinder (9) surrounding the outside of the through opening (8) is arranged on the end of the connecting sleeve (2) away from the hydraulic cylinder (1); the threaded sleeve (4) is arranged to penetrate the limiting cylinder (9); a placement groove (10) is provided on the outer wall of the threaded sleeve (4); a first limiting clamping bead (12) is elastically installed in the placement groove (10) by means of a spring (11); a first clamping groove (13) adapted to the first limiting clamping bead (12) is provided on the inner wall of the limiting sleeve (9); and the first limiting clamping bead (12) is clamped and installed in the interior of the first clamping groove (13).

5. The puller for repairing a hydraulic coupling according to claim 1, characterized in that: The top rod (5) comprises a top seat (501), a first connecting seat (502) and a second connecting seat (503) which are arranged in sequence in a direction close to the screw rod (3); the top seat (501) is threadedly mounted on one end of the first connecting seat (502); a threaded barrel (504) is arranged on a side wall of the second connecting seat (503) away from the first connecting seat (502); the threaded barrel (504) is threadedly mounted inside the screw rod (3); a threaded rod (505) is arranged on a side wall of the first connecting seat (502) close to the second connecting seat (503); the threaded rod (505) is threadedly mounted inside the second connecting seat (503) and movably passes through the second connecting seat (503) and then extends to the inner cavity of the threaded barrel (504).

6. A puller for repairing a hydraulic coupling according to claim 5, characterized in that: A threaded column (506) is provided on the side wall of the top seat (501) close to the first connecting seat (502), a first threaded groove (507) is provided inside the first connecting seat (502), and the threaded column (506) is threadedly installed inside the first threaded groove (507).

7. The puller for repairing a hydraulic coupling according to claim 5, characterized in that: A second thread groove (508) is provided inside the second connecting seat (503), and the threaded rod (505) is threadedly installed in the second thread groove (508). Two first locking nuts (509) are threadedly installed on the outer wall of the threaded rod (505). The two first locking nuts (509) are tightly attached to the side wall of the second connecting seat (503) away from the threaded tube (504) in sequence, and the internal threads of the two first locking nuts (509) are also arranged in opposite directions.

8. The puller for repairing a hydraulic coupling according to claim 5, characterized in that: The screw rod (3) is provided with a third thread groove (510) inside, and the threaded barrel (504) is threadedly mounted inside the screw rod (3) by being threadedly connected to the third thread groove (510). Two second locking nuts (511) are threadedly mounted on the outer wall of the threaded barrel (504). The two second locking nuts (511) are sequentially tightly attached to the side wall of the screw rod (3) close to the threaded barrel (504), and the internal threads of the two second locking nuts (511) are arranged in opposite directions.

9. The puller for repairing a hydraulic coupling according to claim 1, characterized in that: A second limit clamping bead (14) is elastically mounted on the output end of the hydraulic oil cylinder (1), a second clamping groove (15) adapted to the second limit clamping bead (14) is provided on the side wall of the connecting sleeve (2), and the second limit clamping bead (14) is clamped and mounted inside the second clamping groove (15).

10. The puller for repairing a hydraulic coupling according to claim 1, characterized in that: A rotating handle (16) is also provided on one end of the screw rod (3).

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