CN117182835B - A pin puller - Google Patents
A pin pullerInfo
- Publication number
- CN117182835B CN117182835B CN202310705336.7A CN202310705336A CN117182835B CN 117182835 B CN117182835 B CN 117182835B CN 202310705336 A CN202310705336 A CN 202310705336A CN 117182835 B CN117182835 B CN 117182835B
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- CN
- China
- Prior art keywords
- pin
- sleeve
- screw
- nut
- radial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
本发明公开了一种拔销器，包括套筒、螺杆、螺母，所述套筒一端依次套装推力球轴承、螺母和压盖，套筒另一端安装有垫块；所述螺母与螺杆连接，螺杆中部通过花键与套筒滑合，螺杆一端依次设有弹簧、挡套、和轴用挡圈，所述挡套可沿螺杆轴向滑动，承力销小端直径与待拆定位销端部的径向小孔适配，大端直径与螺杆的径向孔适配。本发明能够快速、安全地将端部带径向孔的定位销从产品壳体上拔出，解决了拆卸困难的问题，结构紧凑，操作简单方便、功能稳定可靠。
This invention discloses a pin puller, comprising a sleeve, a screw, and a nut. A thrust ball bearing, a nut, and a pressure cap are sequentially fitted onto one end of the sleeve, while a pad is installed at the other end. The nut is connected to the screw, and the middle of the screw slides against the sleeve via a spline. One end of the screw is sequentially provided with a spring, a retaining sleeve, and a shaft retaining ring. The retaining sleeve can slide along the axial direction of the screw. The small end diameter of the load-bearing pin is adapted to the radial small hole at the end of the locating pin to be removed, and the large end diameter is adapted to the radial hole of the screw. This invention can quickly and safely pull out locating pins with radial holes at the end from the product housing, solving the problem of difficult disassembly. It has a compact structure, is simple and convenient to operate, and has stable and reliable function.
Description
Technical Field
The invention belongs to the technical field of mechanical assembly, and relates to a pin puller.
Background
The pin is a common positioning piece, and common types include a cylindrical pin, a conical pin, a grooved pin and the like. The pin and bore are typically an interference or transition fit and are typically not removable after installation. In some occasions needing to be disassembled and assembled, screw holes are usually formed at the end parts of pins for convenient operation, and then the pins are pulled out by using a pin puller.
The pin puller is a tool for disassembling a pin with a screw hole at the end part, and generally consists of a pull rod, a collision block, a pull head and the like. The pull rod is used as a main body, one end of the pull rod is provided with a holding handle and a limit stop, the other end of the pull rod is provided with a pull head, external threads corresponding to screw holes at the end parts of the pins are arranged on the pull head, and the collision block is sleeved on the pull rod and can slide on the pull rod. During operation, the external thread of the pull head is screwed into the screw hole at the end part of the pin, then the hand-held collision block forcefully impacts the limit shoulder of the pull rod towards the other end, impact kinetic energy is instantaneously converted into pulling force, and the pin is quickly pulled out of the connecting piece.
In the assembly process of certain large-scale products, the transition fit locating pin needs to be disassembled and assembled for a plurality of times, the size of the locating pin is smaller, a screw hole for disassembly is not formed in the end part of the locating pin, and the locating pin cannot be taken out by using a conventional pin puller. Because the product is expensive, the dismantling is required to be stable, safe and reliable, and methods such as knocking and shaking which can damage the size and shape of the product cannot be adopted. If the tool clamping head of the wire pliers and the like is used for drawing operation, the surface of the wire pliers is easy to damage, the quality requirement of products is not met, and the wire pliers are scrapped directly. Considering that the end of the locating pin is provided with a radial small hole, an operator tries to pull through the steel wire, but the stress application is difficult, and the problem that the end of the steel wire scratches the surface of a product occurs.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a pin puller for disassembling a positioning pin with a radial hole at the end part.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the pin puller comprises a sleeve, a screw and a nut, wherein a thrust ball bearing, the nut and a gland are sleeved at one end of the sleeve in sequence, a cushion block is arranged at the other end of the sleeve, the nut is connected with the screw, the middle of the screw is in sliding fit with the sleeve through a spline, a spring, a blocking sleeve and a shaft retainer ring are sequentially arranged at one end of the screw, the blocking sleeve can axially slide along the screw, the diameter of the small end of a bearing pin is matched with a radial small hole at the end of a positioning pin to be disassembled, and the diameter of the large end of the bearing pin is matched with a radial hole of the screw.
Preferably, the gland is in threaded connection with the sleeve, the gland provides radial positioning for the nut shaft shoulder through the inner hole, and the axial displacement of the nut is limited through the hole bottom.
In the preferred mode, one end of the screw is provided with a trapezoidal thread, the outer edge of the middle flange is provided with an external spline, and the other end of the screw is provided with a large section of pin and a small section of pin with different diameters.
The pin with the smaller diameter is provided with a radial hole and a groove for installing a check ring for a shaft, and the center of the end face of the pin is also provided with a flat bottom hole matched with the positioning pin to be disassembled.
Preferably, the lower part of the nut is provided with a shaft shoulder, the upper part of the nut is externally hexagonal, the center of the nut is provided with a trapezoidal thread, the lower part of the shaft shoulder is provided with a groove, and a thrust ball bearing is arranged in the groove.
Preferably, the gland is internally provided with an internal thread, a tool retracting groove, a positioning hole and an external hexagonal avoiding hole in sequence.
Preferably, the small end to the large end of the bearing pin adopts conical surface transition, and the large end of the bearing pin is provided with a radial hole.
Preferably, the blocking sleeve is annular, a step hole is formed in the center of the blocking sleeve, and an inclined plane is arranged on the outer circle of the blocking sleeve.
Further preferably, an inner spline which is matched with the outer spline of the screw rod is arranged at the center of the sleeve.
Preferably, the outer circle of the large end of the sleeve is provided with an external thread matched with the gland, the end face of the large end of the sleeve is provided with a groove, the outer circle of the sleeve is provided with a long groove, and flat is manufactured on the groove.
The invention has the following advantages:
The invention can rapidly and safely pull out the positioning pin with the radial hole at the end part from the product shell, solves the problem of difficult disassembly, and has compact structure, simple and convenient operation and stable and reliable function.
Drawings
FIG. 1 is a schematic view of a structure of a positioning pin to be disassembled;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a schematic diagram of the structure of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a cross-sectional view B-B of FIG. 3;
FIG. 6 is a schematic view of the present invention in a mounted pin configuration;
FIG. 7 is a drawing illustrating the state of the present invention;
FIG. 8 is a schematic view of a screw structure;
FIG. 9 is a schematic view of a nut structure;
FIG. 10 is a schematic diagram of a gland configuration;
FIG. 11 is a schematic diagram of a pad structure;
FIG. 12 is a schematic view of a load bearing pin structure;
FIG. 13 is a schematic view of a retainer structure;
FIG. 14 is a schematic view of a sleeve structure;
FIG. 15 is a perspective view of a sleeve;
Fig. 16 is a cross-sectional view A-A of fig. 14.
In the figure: the device comprises a screw rod 1, a nut 2, a thrust ball bearing 3, a gland 4, a spring 5, a cushion block 6, a bearing pin 7, a check ring for an axle 8, a baffle sleeve 9, a sleeve 10, a product shell 11 and a positioning pin to be disassembled 12.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Examples:
the pin puller comprises a screw 1, a nut 2, a thrust ball bearing 3, a gland 4, a spring 5, a cushion block 6, a bearing pin 7, a shaft retainer ring 8, a retainer 9, a sleeve 10 and other parts. The sleeve 10 is used as a basal body, one end of the sleeve is sequentially sleeved with the thrust ball bearing 3, the nut 2 and the gland 3, the other end is provided with a cushion block 6. The gland 4 is in threaded connection with the sleeve 10, radial positioning is provided for the shaft shoulder of the nut 2 through the inner hole, axial displacement of the nut 2 is limited through the hole bottom, and the nut is prevented from falling off. The screw 1 is arranged at the center of the nut 2, the middle part of the screw 1 is in sliding fit with the sleeve 10 through a spline, and the screw 1 only translates and does not rotate when the nut 2 is rotated. The other end of the screw 1 is sequentially provided with a spring 5, a blocking sleeve 9 and a shaft check ring 8, the blocking sleeve 9 can axially slide along the screw 1, and the shaft check ring 8 limits the shaft check ring. During operation, the two bearing pins 7 are symmetrically assembled, the small ends penetrate through radial holes of the screw 1 from two sides and are respectively inserted into radial small holes at the end parts of the positioning pins to be disassembled, and the large ends can only generate small radial displacement and cannot be separated under the restriction of the inner cavity of the retaining sleeve 9.
One end of the screw 1 is provided with a trapezoidal thread, the outer edge of the middle flange is provided with an external spline, the other end of the screw is provided with a large section of pin column and a small section of pin column with different diameters, wherein the larger-diameter column section is longer and used for guiding the retaining sleeve 9. The smaller diameter column section is provided with a radial hole and a groove for installing the shaft retainer ring 8, and the center of the end face of the column section is also provided with a flat bottom hole matched with the positioning pin to be disassembled.
The lower part of the nut 2 is provided with a shaft shoulder, the upper part is an outer hexagon, the center is a trapezoidal thread, and a groove is formed in the lower part of the shaft shoulder and is used for installing the thrust ball bearing 3.
The gland 4 is similar to a hexagonal nut in appearance, and an internal thread, a tool retracting groove, a hole for positioning the shaft shoulder of the nut 2 and an external hexagonal avoiding hole are sequentially arranged in the gland.
The cushion block 6 is made of nylon, so that the surface of a shell of a product can be effectively protected during working, and meanwhile, the cushion block is split into two halves from the middle for convenient disassembly and assembly.
The diameter of the small end of the bearing pin 7 is matched with the radial small hole at the end part of the positioning pin to be disassembled, the small end is in conical surface transition to the large end, the diameter of the large end is matched with the radial hole of the screw 1, the outer part is slightly smaller, and the radial hole is manufactured. As the main stress member, a special steel material having high strength is used because of its relatively small size and relatively large load.
The retaining sleeve 9 is annular, and is provided with a step hole in the center, wherein the diameter of the smaller part is matched with the long column section of the screw rod 2 for guiding, and the larger hole is used for limiting the radial displacement of the bearing pin 7 during working. In addition, in order to facilitate the assembly and disassembly operations of the bearing pin 7, an inclined plane is arranged on the outer circle.
The center of the sleeve 10 is provided with an internal spline matched with the external spline of the screw 1 for preventing the screw from rotating, the excircle of the large end is provided with an external thread matched with the gland 4, and the end face of the large end is provided with a groove for installing a thrust ball bearing. In order to facilitate holding, a long groove is formed on the outer circle, and a flat force is formed on the groove, so that when the dismounting force is large, tools such as a wrench can be used for clamping and fixing.
During operation, the pin puller sleeve 10 is held by hand, the nut 2 is reversely screwed to enable the screw rod 1 to extend rightward, after enough space for installing the bearing pin 7 is exposed, the inclined surface of the retaining sleeve 9 is pushed by hand to enable the retaining sleeve to move leftward, the spring 5 is compressed, then the head of the screw rod 1 is sleeved at the end part of the positioning pin to be disassembled, the radial holes of the screw rod 1 are aligned with the radial small holes of the end part of the positioning pin, then the small ends of the two bearing pins 7 respectively penetrate through the radial holes of the screw rod 1 from two sides and are inserted into the radial small holes of the end part of the positioning pin to be disassembled, the retaining sleeve 9 is loosened, and the retaining sleeve 9 moves rightward under the action of resilience force of the spring 5 until the bottom surface of the inner cavity hole abuts against the shaft retainer ring 8. The inner cavity hole of the retaining sleeve 9 can limit the radial displacement of the bearing pin 7, so that the bearing pin 7 can not deviate from during working. And then the cushion block 6 is arranged, the nut 2 is screwed forward to drive the sleeve 10 to slowly move rightward and abut against the cushion block 6, the ratchet wrench is arranged to continuously screw the nut 2 forward, and the positioning pin slowly breaks away from the product shell under the action of the drawing force until the nut is completely taken out. And reversely screwing the nut 2 again to enable the screw rod 1 to extend rightward, pushing the inclined surface of the baffle sleeve 9 to move leftward after the baffle sleeve 9 exposes enough space, taking out the bearing pin 7, and finally taking out the positioning pin.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (7)
1. The pin puller is characterized by comprising a sleeve, a screw, a nut and a bearing pin, wherein one end of the sleeve is sequentially sleeved with a thrust ball bearing, the nut and a gland, and the other end of the sleeve is provided with a cushion block; the nut is connected with the screw, an external spline is arranged in the middle of the screw and is in sliding fit with an internal spline of the sleeve to prevent the screw from rotating, a trapezoidal thread is arranged at one end of the screw, a flange is arranged in the middle of the screw, two sections of coaxial pins with larger diameter are formed at the other end of the screw, the pins with larger diameter are used for axially guiding the retaining sleeve, radial holes and grooves for installing check rings are formed in the pins with smaller diameter, a flat bottom hole matched with a positioning pin to be dismounted is formed in the center of the end face of the pin with smaller diameter, the retaining sleeve is an annular piece, a step hole is formed in the center of the retaining sleeve, the smaller hole is matched with the pins with larger diameter, the larger hole is used for limiting the radial displacement of the large end of the bearing pin, the retaining sleeve is sleeved on the pins with larger diameter and can axially slide along the screw, and springs, the retaining sleeve and the shaft check rings are sequentially arranged at one end of the screw, the springs are used for pushing the retaining sleeve to reset towards the end of the screw, the small end of the bearing pin is matched with the radial small holes of the end of the positioning pin, the large end of the bearing pin with the radial holes of the screw are matched with the radial holes of the positioning pin, the two bearing pins are symmetrically arranged, and the two bearing pins are inserted into the radial holes of the positioning pin to the two opposite radial bearing pins through the two bearing pin holes, and the two bearing pin holes are correspondingly arranged in the radial pin holes and the two opposite to the radial pin positioning pin holes and the positions through the small end holes and the corresponding to the radial pin positioning pin hole and the bearing pin;
When the pin puller sleeve works, the nut is reversely screwed to enable the screw rod to extend rightwards, after enough space for installing the bearing pin is exposed, the inclined surface of the retaining sleeve is pushed by hand to enable the retaining sleeve to move leftwards, the spring is compressed, then the head of the screw rod is sleeved at the end part of the positioning pin to be disassembled, the radial holes of the screw rod are aligned with the radial holes of the end part of the positioning pin, then the small ends of the two bearing pins respectively penetrate through the radial holes of the screw rod from two sides and are inserted into the radial holes of the end part of the positioning pin to be disassembled, the retaining sleeve is loosened, the retaining sleeve moves rightwards under the action of the resilience force of the spring until the bottom surface of the inner cavity hole of the retaining sleeve abuts against the retainer ring for the shaft, the radial displacement of the bearing pin can be limited, the bearing pin can not be separated when working, then the cushion block is installed, the nut is driven by forward screwing the nut to drive the sleeve slowly rightwards and abut against the cushion block, the ratchet wrench is installed, and the nut is continuously screwed forwards, and the positioning pin is separated from the product shell slowly until the retaining pin is completely taken out under the action of the pulling force.
2. A pin puller as set forth in claim 1 wherein the gland is threadably engaged with the sleeve and the gland provides radial positioning of the nut shoulder through the bore and limits axial displacement of the nut through the bore bottom.
3. The pin puller of claim 1, wherein the lower part of the nut is provided with a shaft shoulder, the upper part of the nut is externally hexagonal, the center of the nut is trapezoidal threads, the lower part of the shaft shoulder is provided with a groove, and a thrust ball bearing is arranged in the groove.
4. The pin puller as set forth in claim 1, wherein the gland has internal threads, a clearance groove, a locating hole and an external hexagonal relief hole in sequence.
5. The pin puller of claim 1, wherein the small end to the large end of the bearing pin adopts conical surface transition, and the large end of the bearing pin is provided with a radial hole.
6. The pin puller as set forth in claim 1, wherein the outer circumference of the retaining sleeve is provided with a bevel.
7. The pin puller as set forth in claim 1, wherein the outer circumference of the large end of the sleeve is provided with an external thread adapted to the gland, the end face of the large end of the sleeve is provided with a groove, the outer circumference of the sleeve is provided with a long groove, and a flat force is produced on the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310705336.7A CN117182835B (en) | 2023-06-14 | 2023-06-14 | A pin puller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310705336.7A CN117182835B (en) | 2023-06-14 | 2023-06-14 | A pin puller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117182835A CN117182835A (en) | 2023-12-08 |
| CN117182835B true CN117182835B (en) | 2026-03-17 |
Family
ID=88987558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310705336.7A Active CN117182835B (en) | 2023-06-14 | 2023-06-14 | A pin puller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117182835B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201446979U (en) * | 2009-07-08 | 2010-05-05 | 三一重机有限公司 | A locking mechanism for telescopic frame |
| CN218698397U (en) * | 2022-11-16 | 2023-03-24 | 浙江坤鸿机械设备有限公司 | Pin pulling device |
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| US5604967A (en) * | 1995-05-15 | 1997-02-25 | Mcmahon; Richard P. | Dowel extraction device |
| DE202007016624U1 (en) * | 2007-11-28 | 2008-04-24 | Hu, Chih Kuo | Drive for a puller |
| CN203843770U (en) * | 2014-02-18 | 2014-09-24 | 哈尔滨电机厂有限责任公司 | Pin removing device for hydropower generating unit |
| CN204076161U (en) * | 2014-04-24 | 2015-01-07 | 张德根 | The powerful stripping attachment of motorcycle piston pin |
| CN203993735U (en) * | 2014-05-07 | 2014-12-10 | 杨元清 | A kind of pin removal |
| CN106425993A (en) * | 2016-11-30 | 2017-02-22 | 广西玉柴机器股份有限公司 | Tool and method for quickly disassembling thin-shaft parts with radial openings |
| CN208744713U (en) * | 2018-10-08 | 2019-04-16 | 武汉鑫金泽机械有限公司 | A kind of pin removal |
| CN211220512U (en) * | 2019-12-05 | 2020-08-11 | 哈尔滨哈飞航空工业有限责任公司 | Pin tube dismounting tool |
| CN111844860A (en) * | 2020-07-24 | 2020-10-30 | 湖南伍子醉食品有限公司 | Semi-automatic bolt pin pulling equipment for betel nut seed pressing barrel |
| CN213411840U (en) * | 2020-08-25 | 2021-06-11 | 山东核电有限公司 | Portable pin puller |
| CN112777005B (en) * | 2021-01-14 | 2024-06-18 | 北京灵翼航宇科技有限公司 | Memory metal pin puller with high shearing resistance |
-
2023
- 2023-06-14 CN CN202310705336.7A patent/CN117182835B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201446979U (en) * | 2009-07-08 | 2010-05-05 | 三一重机有限公司 | A locking mechanism for telescopic frame |
| CN218698397U (en) * | 2022-11-16 | 2023-03-24 | 浙江坤鸿机械设备有限公司 | Pin pulling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117182835A (en) | 2023-12-08 |
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