Drawing device
By designing a puller including a connector, a screw and a wrench, the problem of uneven stress when disassembling an irregular reducer in the prior art is solved, and the effective disassembly of the irregular-shaped reducer is realized, which avoids damage to the workpiece and tools, and improves the disassembly efficiency and safety.
Patent Information
- Application Number
- CN202422552722.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-22
AI Technical Summary
When disassembling large volume and irregular shape reducers, existing pullers are likely to cause uneven stress and damage to workpieces or tools.
A puller is designed, including a connecting piece, a screw and a wrench. It is screwed to the connecting piece through a screw, and the screw is driven to rotate by a wrench, so as to connect the connecting piece and the screw holes of the reducer to adapt to the reducer with irregular shapes, and solve the problem of uneven stress.
The effective disassembly of the reducer with irregular shape is achieved, which avoids damage to workpieces and tools, and improves the disassembly efficiency and safety.
Smart Images
Figure CN223301617U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of equipment maintenance tools, in particular to a puller. Background Art
[0002] Reducers are common mechanical equipment that require disassembly for repair. Currently, the disassembly tools used are two- or three-pronged pullers. When using conventional pullers, the length, spacing, and screw length of the pullers must be considered, and appropriate pullers must be selected to disassemble regular-shaped workpieces, such as symmetrical bearings. Disassembling large, irregularly shaped workpieces like reducers results in uneven force on the pullers, making it impossible to effectively hook the workpiece. Consequently, the reducer cannot be effectively disassembled. Forced disassembly can damage the workpiece or the disassembly tool. These issues urgently need to be addressed. Utility Model Content
[0003] The utility model discloses a puller, which aims to solve the technical problems existing in the prior art.
[0004] The utility model adopts the following technical solutions:
[0005] The utility model provides a puller, which is used to disassemble a reducer; the puller includes a connecting piece, a screw and a wrench; the connecting piece is provided with a through hole for being screwed to the reducer; the screw and the through hole extend in the same direction and are screwed to the connecting piece, with both ends exposed from the connecting piece, one end being used to abut against the rotating shaft of the reducer, and the other end being connected to the wrench; the extension direction of the wrench is different from the extension direction of the screw, and the wrench is fixedly connected to the screw to drive the screw to rotate.
[0006] In the puller of the present invention, the wrench includes a handle and an adjustable limiter; the adjustable limiter is installed at the end of the screw and has a limit state and a release state; the handle is installed on the adjustable limiter, and when the adjustable limiter is in the limit state, the handle drives the screw to rotate through the adjustable limiter, and when the adjustable limiter is in the release state, the handle can rotate around the adjustable limiter.
[0007] In the puller of the present invention, the adjustable limit member includes a first limit member, a second limit member and a mounting seat; the first limit member and the second limit member are arranged adjacent to each other, and the rotating shaft is rotatably arranged in parallel in the mounting seat; the first limit member is fixed to the end of the screw, and a limiting recess is provided on the side adjacent to the second limit member; the second limit member has a limiting convex portion on the side adjacent to the first limit member, and when the second limit member rotates, the limiting convex portion has a limiting state located inside the limiting recess and a release state located outside the limiting recess, when the second limit member is in the limiting state, the first limit member cannot rotate relative to the mounting seat, and when in the release state, the first limit member can rotate relative to the mounting seat; the mounting seat can rotate relative to the screw and is fixedly connected to the handle.
[0008] In the puller of the present invention, the first limiting member is a gear, and the limiting recess is formed between two adjacent teeth; the second limiting member is a disc-shaped structure, and has a notch adjacent to the edge of the first limiting member; the limiting protrusions are respectively formed on both sides of the notch, so that when the limiting protrusions are located in the limiting concave, when the first limiting member rotates forward, the limiting protrusions limit the rotation of the first limiting member, and when the first limiting member rotates reversely, the limiting protrusions do not limit the rotation of the first limiting member.
[0009] In the puller of the present invention, the notch is a fan-shaped structure; the limiting protrusion is kept in contact with the limiting recess via a torsion spring.
[0010] In the puller of the present invention, the mounting seat has a circular groove for accommodating the first limiting member and the second limiting member.
[0011] In the puller of the present invention, the connecting member is a disc-shaped structure, and the lead screw and the connecting member are coaxially arranged.
[0012] In the puller of the present invention, the through hole is an elongated hole.
[0013] In the puller of the present invention, the wrench is arranged perpendicular to the lead screw.
[0014] In the puller of the present invention, the end of the lead screw used for contacting with the rotating shaft of the reducer is a sharp end.
[0015] The technical solution adopted by the utility model can achieve the following beneficial effects:
[0016] The utility model mainly provides a puller, which is based on the fact that a connecting piece can be screwed to a reducer to be disassembled, and then one end of a lead screw abuts against the shaft end of the reducer. At this time, by pulling a wrench, the lead screw is driven to rotate. Since the lead screw is screwed to the connecting piece, and the connecting piece is fixedly connected to the reducer, when the lead screw rotates, it can drive the connecting piece and the reducer to move relative to the shaft end, thereby disassembling the reducer. The method of connecting the connecting piece to the screw hole of the reducer to be disassembled by screw connection can adapt to reducers with irregular shapes, and solves the problem of uneven force of existing pullers and damage to workpieces or tools. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:
[0018] Figure 1 This is a structural diagram of a puller of the present utility model;
[0019] Figure 2 This is one of the three-dimensional structural diagrams of the wrench of the present utility model;
[0020] Figure 3 This is one of the main structural diagrams of the wrench of the present utility model;
[0021] Figure 4 This is the second main structural diagram of the wrench of the present invention;
[0022] Figure 5 The second schematic diagram of the three-dimensional structure of the wrench of the present invention.
[0023] Description of reference numerals:
[0024] 1. Connector; 11. Through hole; 2. Screw; 3. Wrench; 31. Handle; 32. Adjustable limiter; 321. First limiter; 3211. Limiting recess; 322. Second limiter; 3221. Limiting protrusion; 3222. Notch; 323. Mounting seat; 324. Torsion spring. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is generally used in the sense of including "and / or" unless the content clearly indicates otherwise.
[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a magnetic connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three or more, etc., unless otherwise clearly specified and limited.
[0027] In the field of interventional medical device technology, the direction closest to the operator is generally defined as the proximal end, and the direction away from the operator is defined as the distal end. The direction of the central axis of objects such as cylinders and tubes is defined as the axial direction. The radial direction refers to the direction passing through the central axis in a radial plane, for example, along a straight line of diameter or radius, or perpendicular to the central axis.
[0028] Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] In order to solve the problems existing in the prior art, an embodiment of the present application provides a puller.
[0030] like Figure 1 As shown, a puller is used to disassemble a reducer; the puller includes a connector 1, a screw 2 and a wrench 3; the connector 1 is provided with a through hole 11 for screwing to the reducer; the screw 2 extends in the same direction as the through hole 11 and is screwed to the connector 1, with one end exposed to the connector 1, and one end is used to abut against the rotating shaft of the reducer. Preferably, the screw 2 is coaxially arranged with the reducer shaft end, and the relative position is fixed by a bolt in the threaded hole; the other end is connected to the wrench 3; the extension direction of the wrench 3 is different from the extension direction of the screw 2, and the wrench 3 is fixed to the screw 2 for driving the screw 2 to rotate.
[0031] The utility model provides a puller, based on the fact that a connecting piece 1 can be screwed to a reducer to be disassembled (the working surface of the reducer shaft end cover is flat and has a regular internal thread), and then one end of the lead screw 2 is in contact with the shaft end of the reducer. At this time, by pulling the wrench 3, the lead screw 2 is driven to rotate. Based on the fact that the lead screw 2 is screwed to the connecting piece 1, and the connecting piece 1 is fixedly connected to the reducer cover, when the lead screw 2 rotates, it can drive the connecting piece 1 and the reducer to move relative to the shaft end, thereby disassembling the reducer. The method of connecting the connecting piece 1 to the screw hole of the reducer to be disassembled based on the screw connection can adapt to reducers with irregular shapes, and solves the problem of uneven force of the existing puller and damage to the workpiece or tool caused by it.
[0032] In some preferred embodiments, Figure 2 As shown, the wrench 3 includes a handle 31 and an adjustable limiter 32; the adjustable limiter 32 is mounted on the end of the screw 2 and has a limited state and a released state; the handle 31 is mounted on the adjustable limiter 32, and when the adjustable limiter 32 is in the limited state, the handle 31 drives the screw 2 to rotate through the adjustable limiter 32, and when the adjustable limiter 32 is in the released state, the handle 31 can rotate around the adjustable limiter 32; based on the setting of the adjustable limiter 32, when it is in the released position, The position of the handle 31 relative to the adjustable limiter 32 can be adjusted so that it can be used in a position with relatively limited space. That is, when there is enough space to pull the handle 31, the adjustable limiter 32 is adjusted to the limited state. At this time, pulling the handle 31 drives the screw 2 to rotate. When the movement of the handle 31 is limited, the adjustable limiter 32 is adjusted to the release position. At this time, pull the handle 31 in the opposite direction to reset it, adjust the adjustable limiter 32 to the limited state again, and operate again until the reducer is disassembled.
[0033] In some preferred embodiments, Figure 2-4 As shown, the adjustable limiting member 32 includes a first limiting member 321, a second limiting member 322 and a mounting seat 323; the first limiting member 321 and the second limiting member 322 are arranged adjacent to each other, and the rotating shaft is arranged to rotate in parallel in the mounting seat 323; the first limiting member 321 is fixed to the end of the screw 2, and a limiting recess 3211 is provided on the side adjacent to the second limiting member 322; the second limiting member 322 has a limiting convex portion 3221 on the side adjacent to the first limiting member 321, and when the second limiting member 322 rotates, the limiting convex portion 3221 has a limiting state located in the limiting recess 3211 (as shown in FIG. Figure 4 ) and the release state outside the limiting recess 3211 (such as Figure 3), when in the limited state, the first limit member 321 cannot rotate relative to the mounting seat 323. At this time, the limiting protrusion 3221 is against the limiting recess 3211. When in the released state, the first limit member 321 can rotate relative to the mounting seat 323; the mounting seat 323 can rotate relative to the screw 2 and is fixed to the handle 31; based on the rotation of the second limit member 322, the limiting protrusion 3221 is switched between the limited state and the released state, which is more convenient to adjust.
[0034] Preferably, the second limiting member 322 has a wrench portion for rotating the second limiting member 322 .
[0035] Preferably, the first limiting member 321 is detachably connected to the end of the screw 2. For example, the first limiting member 321 is provided with a limiting hole, and the limiting hole is mounted on the end of the screw 2. For example, the limiting hole is a polygonal hole, and the end of the screw 2 is a polygonal cylinder. The two are plugged in and limited to rotate with each other.
[0036] Preferably, the first limiting member 321 is a gear, and a limiting recess 3211 is formed between two adjacent teeth; the second limiting member 322 is a disc-shaped structure, and a notch 3222 is provided on the edge adjacent to the first limiting member 321; limiting protrusions 3221 are respectively formed on both sides of the notch 3222, so that when the limiting protrusion 3221 is located in the limiting recess 3211, when the first limiting member 321 rotates forward, the limiting protrusion 3221 limits the rotation of the first limiting member 321, that is, the limiting protrusion 3221 can abut between the two teeth; when the first limiting member 321 rotates reversely, the limiting protrusion 3221 does not limit the rotation of the first limiting member 321, that is, the limiting protrusion 3221 cannot abut between the two teeth; based on the use of a gear as the first limiting member 321, the requirements for the installation positions of the first limiting member 321 and the second limiting member 322 are reduced, and installation is more convenient.
[0037] More preferably, Figure 2 and 5 As shown, the notch 3222 is a fan-shaped structure; the limiting protrusion 3221 maintains contact with the limiting recess 3211 through the torsion spring 324; based on this, there is no need to manually adjust the second limiting member 322, so that when the first limiting member 321 rotates forward, the limiting protrusion 3221 limits the rotation of the first limiting member 321, and the reverse limiting protrusion 3221 does not limit the rotation of the first limiting member 321, so as to improve work efficiency.
[0038] In some preferred embodiments, Figure 2 As shown, the mounting seat 323 has a circular groove for accommodating the first limiting member 321 and the second limiting member 322; that is, two circular grooves are respectively adapted to the first limiting member 321 and the second limiting member 322, and the two circular grooves are partially connected; so that the first limiting member 321 and the second limiting member 322 can rotate relative to each other for limiting.
[0039] In some preferred embodiments, Figure 1 As shown, the connecting member 1 is a disc-shaped structure, and the screw 2 is coaxially arranged with the connecting member 1; based on this, when the screw 2 rotates, the force applied to each part of the connecting member 1 is more uniform, which is conducive to smooth disassembly.
[0040] In some preferred embodiments, Figure 1 As shown, the through hole 11 is an elongated hole. Setting the through hole 11 as an elongated hole can adapt to bolt holes in different positions, thereby improving the scope of application.
[0041] In some preferred embodiments, Figure 1 As shown, the wrench 3 is arranged perpendicular to the screw 2; based on this, the torque is maximum when the wrench 3 is pulled, which saves more effort.
[0042] In some preferred embodiments, Figure 1 As shown, one end of the screw 2 used to abut against the rotating shaft of the reducer is a sharp end; based on the setting of the sharp end, the contact area with the shaft end is reduced, and the uneven contact surface is avoided to affect the pulling process, and the shaft end has a recess, and the sharp end can abut against the recess of the shaft end, the abutment is more stable, and the shaft end of the reducer is subjected to more uniform force.
[0043] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, all of which are within the protection of the present invention.
Claims
1. A puller, used for disassembling a reducer; characterized in that: The puller includes a connecting piece, a lead screw and a wrench; The connecting piece is provided with a through hole for screw connection with the reducer; The lead screw is arranged to extend in the same direction as the through hole and is screwed to the connecting member, with both ends exposed from the connecting member, one end being used to abut against the rotating shaft of the reducer, and the other end being connected to the wrench; The extending direction of the wrench is different from the extending direction of the lead screw, and the wrench is fixedly connected to the lead screw to drive the lead screw to rotate.
2. The puller according to claim 1, characterized in that: The wrench includes a handle and an adjustable limiter; The adjustable limiter is installed at the end of the lead screw and has a limit state and a release state; The handle is mounted on the adjustable limiter, and when the adjustable limiter is in a limited state, the handle drives the lead screw to rotate through the adjustable limiter, and when the adjustable limiter is in a released state, the handle can rotate around the adjustable limiter.
3. The puller according to claim 2, characterized in that: The adjustable limiting member includes a first limiting member, a second limiting member and a mounting seat; The first limiting member and the second limiting member are arranged adjacent to each other, and the rotating shaft is rotatably arranged in parallel in the mounting seat; The first limiting member is fixedly mounted on the end of the lead screw, and a limiting recess is provided on the side surface adjacent to the second limiting member; The second limiting member has a limiting protrusion on a side adjacent to the first limiting member. When the second limiting member rotates, the limiting protrusion has a limiting state in which it is located within the limiting recess and a released state in which it is located outside the limiting recess. When in the limiting state, the first limiting member cannot rotate relative to the mounting seat. When in the released state, the first limiting member can rotate relative to the mounting seat. The mounting seat can rotate relative to the lead screw and is fixedly connected to the handle.
4. The puller according to claim 3, characterized in that: The first limiting member is a gear, and the limiting recess is formed between two adjacent teeth; the second limiting member is a disc-shaped structure, and has a notch adjacent to the edge of the first limiting member; the limiting protrusions are respectively formed on both sides of the notch, so that when the limiting protrusions are located in the limiting recesses, when the first limiting member rotates forward, the limiting protrusions limit the rotation of the first limiting member, and when the first limiting member rotates reversely, the limiting protrusions do not limit the rotation of the first limiting member.
5. The puller according to claim 4, characterized in that: The notch is a fan-shaped structure; the limiting protrusion is kept in contact with the limiting concave portion through a torsion spring.
6. The puller according to claim 4, characterized in that: The mounting seat has a circular groove for accommodating the first limiting member and the second limiting member.
7. The puller according to claim 1, characterized in that: The connecting piece is a disc-shaped structure, and the lead screw is coaxially arranged with the connecting piece.
8. The puller according to claim 1, characterized in that: The through hole is an elongated hole.
9. The puller according to claim 1, characterized in that: The wrench is arranged perpendicular to the lead screw.
10. The puller according to claim 1, characterized in that: One end of the lead screw for contacting with the rotating shaft of the reducer is a sharp end.