CN112720347A - Pin puller - Google Patents
Pin puller Download PDFInfo
- Publication number
- CN112720347A CN112720347A CN202011501426.7A CN202011501426A CN112720347A CN 112720347 A CN112720347 A CN 112720347A CN 202011501426 A CN202011501426 A CN 202011501426A CN 112720347 A CN112720347 A CN 112720347A
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- pin
- stud
- axial
- pin puller
- nut
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- 230000035515 penetration Effects 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/08—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing cotter pins
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The invention discloses a pin puller, which comprises: the handle part is provided with a pin pulling stud at one end; the tray body is sleeved outside the pull pin stud, a plurality of strip-shaped axial through holes which are uniformly arranged around the axis of the pull pin stud and extend along the radial direction are arranged on the tray body, and the axial through holes are used for axial penetration of a pull pin screw; and the screw cap is in threaded connection with the pull pin stud so as to detachably lock the disc body on the handle part. In this pin puller, compare current pin puller, set up disk body and nut for pack into the disk body after, because the axial perforation that the homodisperse set up on the disk body, make and to adapt to non-axis screw hole, and then can extract corresponding round pin axle. In conclusion, the pin puller can effectively solve the problem that the existing pin puller is poor in adaptability.
Description
Technical Field
The invention relates to the technical field of tools, in particular to a pin puller.
Background
The pin shaft connection is a very important connection mode in mechanical equipment (particularly engineering machinery). Pin connections are widely used in various mechanisms. However, the disassembly of the pin shaft is always a difficult problem in the assembling, remanufacturing and maintaining processes of mechanical equipment. Most pin shafts are disassembled in a knocking and disassembling mode. However, due to the influences of the operation space, the operation direction and the like, many pin shafts must be detached by drawing.
The pin shaft drawing and dismounting mode mainly needs to solve two kinds of problems. Firstly, how dismounting device and round pin hub connection, prior art generally has modes such as threaded connection, clamping jaw connection, welding. Secondly, the dismounting device adopts which force application mode to pull out the pin shaft. The prior art generally has the modes of ram impact, hydraulic oil cylinder drawing, thread/screw drawing and the like.
Aiming at the connection mode of the dismounting device and the pin shaft when the pin shaft is dismounted, the most common mode is the threaded connection mode at present, and internal threads are generally designed on the end face of the pin shaft to serve as pin pulling holes during pin shaft design. The conventional pin pulling holes are positioned on the axial axis of the pin shaft. Due to the improvement of the technology, parts such as concentrated lubrication pipeline joints and various sensors are often required to be installed at the center of the pin shaft at present, pin pulling holes cannot be arranged on the axis, and the pin pulling holes can only be arranged at other positions of the end face of the pin shaft. The pin shaft with the pin pulling hole is difficult to pull off in the non-axial arrangement.
In summary, how to effectively solve the problem of poor adaptability of the current pin puller is a problem which needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides a pin puller, which can effectively solve the problem of poor adaptability of the existing pin puller.
In order to achieve the purpose, the invention provides the following technical scheme:
a pin puller, comprising: the handle part is provided with a pin pulling stud at one end; the tray body is sleeved outside the pull pin stud, a plurality of strip-shaped axial through holes which are uniformly arranged around the axis of the pull pin stud and extend along the radial direction are arranged on the tray body, and the axial through holes are used for axial penetration of a pull pin screw; and the screw cap is in threaded connection with the pull pin stud so as to detachably lock the disc body on the handle part.
In this pin puller, when using, when the screw hole of round pin axle is the shaft hole, loosen the nut this moment, take off the disk body, then carry out threaded connection with the screw hole of round pin axle with the pin pulling double-screw bolt, then to the stalk portion application of force to take out the round pin axle. And when the round pin axle was provided with a plurality of screw holes that correspond the setting with the axial perforation, selected the pin pulling screw with screw hole matched with this moment, when the disk body passes through the nut locking on the stalk portion, set up screw hole and axial perforation alignment this moment, then pass the axial perforation with each pin pulling screw in proper order to be connected with the screw hole of round pin axle, then to the shank application of force, in order to take out the round pin axle. In this pin puller, compare current pin puller, set up disk body and nut for pack into the disk body after, because the axial perforation that the homodisperse set up on the disk body, make and to adapt to non-axis screw hole, and then can extract corresponding round pin axle. In conclusion, the pin puller can effectively solve the problem that the existing pin puller is poor in adaptability.
Preferably, a pin-pulling screw is included, said screw being inserted in said axial through hole.
Preferably, the pin pulling stud is a stud, one end of the stud penetrates into the axial through hole of the handle and is in threaded connection with the locking nut, and the other end of the stud is in threaded connection with the nut.
Preferably, a countersunk hole is formed in the tray body so that the nut is embedded in the countersunk hole.
Preferably, the outer diameter of the threaded section on the stud of the pulling pin matched with the screw cap is equal to the transverse width of the axial through hole.
Preferably, the disk body is disc-shaped and is provided with four axial through holes which are uniformly arranged around the axis of the pull pin stud.
Preferably, the outer profile of the cross section of the nut is circular, and the counter bore is a cylindrical bore and is in threaded connection with the nut.
Preferably, the aperture in the plate body is a clearance fit with the draw pin stud.
Preferably, be provided with on the stalk portion along the slide bar section of pulling pin double-screw bolt axial extension, the slide bar section is kept away from the one end of disk body is provided with spacing shoulder, still including the cover establish the hammer on the slide bar section is with can the axial striking spacing shoulder.
Preferably, one end of the sliding rod section, which is far away from the disc body, is provided with an axially extending hand holding part.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pin puller according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is a schematic side view of a pin extractor according to an embodiment of the present invention;
FIG. 4 is a schematic view of a disk surface structure of a disk body according to an embodiment of the present invention;
fig. 5 is a schematic axial sectional view of a disk body according to an embodiment of the present invention.
The drawings are numbered as follows:
the novel tool comprises a disc body 1, a pin pulling screw 2, a nut 3, a pin pulling stud 4, a lock nut 5, a handle 6, a hammer 7, an axial through hole 11, a counter bore 12 and a middle hole 13.
Detailed Description
The embodiment of the invention discloses a pin puller, which is used for effectively solving the problem of poor adaptability of the existing pin puller.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram of a pin extractor according to an embodiment of the present invention; FIG. 2 is an enlarged view of the structure at A in FIG. 1; FIG. 3 is a schematic side view of a pin extractor according to an embodiment of the present invention; FIG. 4 is a schematic view of a disk surface structure of a disk body according to an embodiment of the present invention; fig. 5 is a schematic axial sectional view of a disk body according to an embodiment of the present invention.
In one embodiment, the present embodiment provides a pin puller that specifically includes a shank 6, a disc 1 and a nut 3. Specifically, the pin puller is mainly suitable for a pin shaft with an axially extending screw hole at the outer end.
Wherein, one end of the handle part 6 is provided with the pin pulling stud 4, and the other end is a force application part so as to facilitate the application of force by tools or human hands. The shank 6 is generally rod-shaped and may be block-shaped. Wherein the pin-pulling stud 4 can be detachably and fixedly connected with the handle 6, such as threaded connection, bolt locking connection, clamping connection and the like, or can also be non-detachable and fixedly connected, integrally formed, welded and the like. In the case of a threaded connection, it is preferably opposite to the thread of the threaded bore in the pin to form a stud and can be fixed to the shank 6 by means of a locking nut. So that the pin pulling stud 4 can be in threaded connection with the screw hole of the corresponding pin shaft and can transmit torque to enable pin pulling operation.
Wherein the disk body 1 is sleeved outside the pin pulling stud 4, and the screw cap 3 is in threaded connection with the pin pulling stud 4 so as to lock the disk body 1 on the handle part 6. Namely, the hole 13 in the disk body 1 is sleeved outside the pin pulling stud 4, one side of the disk body 1 is abutted against the limit shoulder of the pin pulling stud 4, and the other side of the disk body is abutted against the nut 3 which is in threaded connection with the pin pulling stud 4, so that locking and fixing are realized through the nut 3. Because the nut 3 is used for locking the connection, it is then correspondingly provided that the disc 1 should be able to be removed from the stud 4 when the nut 3 is loosened and the nut 3 is removed, in order to enable disassembly, i.e. removal.
The disk body 1 is provided with a plurality of axial through holes 11 which are uniformly arranged around the axis of the pin pulling stud 4 and are all elongated along the radial direction, the axial through holes 11 are used for axial penetration of the pin pulling screws 2, namely, the axial through holes are penetrated into the axial through holes 11 along the axial direction of the pin pulling stud 4, the width of the axial through holes 11 is generally equal to that of the corresponding pin pulling screws 2 and is at least not greater than the width of the screw heads of the pin pulling screws 2, so as to ensure that the transmission of the supporting force between the screw heads is ensured. When the novel pulling pin device is used, the pulling pin screw 2 penetrates into the axial through hole 11 from one side of the disk body 1, then is in threaded connection with the pin shaft screw hole on the other side of the disk body 1, then moves towards the direction far away from the pin shaft by pushing the handle part 6, at the moment, the screw head of the pulling pin screw 2 is abutted against one side, far away from the pin shaft, of the disk body 1, then the thrust is transmitted to the screw head, and further transmitted to the pin shaft so as to push the pin shaft to be separated.
It should be noted that, wherein a plurality of axial through holes 11 are evenly arranged around the axis of the pull pin stud 4, two axial through holes 11 can be aligned at an angle of 180 degrees, so as to correspond to two screw holes correspondingly arranged on the end portion of the pin shaft with respect to the axis, correspondingly, three axial through holes 11 can also be arranged in a central symmetry manner with respect to the axis of the pull pin stud 4, and the included angle therebetween is 120 degrees, so as to correspond to three screw holes symmetrically arranged in a central symmetry manner with respect to the axis at the end portion of the pin shaft. Correspondingly, the four axial through holes 11 can be arranged in a central symmetry manner about the axis of the pin pulling stud 4, and the included angle between the four axial through holes is 90 degrees, so that the two or four screw holes arranged in a central symmetry manner about the axis at the end part of the corresponding pin shaft can be arranged. That is, the axial through holes 11 having a total number (the total number is a number that can be divided by 1 and itself, but also by another number (except 0) among integers larger than 1) are provided symmetrically with respect to the axis center of the stud bolt 4 so as to correspond to screw holes having an integer number (including the number) larger than 1 of the total number at the end of the pin shaft.
The axial through hole 11 extends along the radial direction to be in a strip shape, so that the position of the pin pulling screw 2 can be adjusted along the axial direction of the pin pulling stud 4 relative to the disc body 1, and the pin shaft is further suitable for pin shafts with different diameters, and the distance between the screw hole on the pin shaft and the corresponding center of the screw hole is adjusted to be consistent. The length of the axial through hole 11 in the radial direction can be set as required, and specifically should be consistent with the outer diameter of the disk body 1. The width of the axial through hole 11 should be the same as the width of the pin pulling screw 2, specifically, the outer diameter of the threaded section of the pin pulling stud 4 matched with the nut 3 can be equal to the transverse width of the axial through hole 11, so that the pin pulling stud 4 and the pin pulling screw 2 are adapted to the screw holes with the same diameter and size.
In this pin puller, when using, when the screw hole of round pin axle is the shaft hole, loosen nut 3 this moment, take off disk body 1, then carry out threaded connection with the screw hole of round pin axle with pin pulling stud 4, then apply force to stalk portion 6 to take out the round pin axle. And when the round pin axle was provided with a plurality of screw holes that correspond the setting with axial perforation 11, selected the pin pulling screw 2 with screw hole matched with this moment, when disk body 1 passed through nut 3 locking on stalk portion 6, set up screw hole and axial perforation 11 alignment this moment, then pass axial perforation 11 with each pin pulling screw 2 in proper order, with being connected with the screw hole of round pin axle, then to stalk portion 6 application of force, in order to take out the round pin axle. In this pin puller, compare current pin puller, set up disk 1 and nut 3 for pack into disk 1 back, because the axial perforation 11 that the homodisperse on the disk 1 set up, make and to adapt to non-axis screw hole, and then can extract corresponding round pin axle. In conclusion, the pin puller can effectively solve the problem that the existing pin puller is poor in adaptability.
Further, for the convenience of connection, the stud bolt 4 is preferably a stud bolt, one end of the stud bolt penetrates into the axial through hole of the handle 6 and is in threaded connection with the lock nut 5, and the other end of the stud bolt is in threaded connection with the nut 3, so that the stud bolt can be locked and fixed on the handle 6 through the lock nut 5.
Further, in order to avoid that the nut 3 protrudes from one side of the tray body 1 to cause a certain interference during use, it is preferable that a counter bore 12 is formed in the tray body 1 so that the nut 3 can be embedded in the counter bore 12, wherein the nut 3 may be an inner hexagonal nut or an inner cross nut, that is, an inner threaded hole is formed at an end of the nut 3, and the whole body is cylindrical, and may also be an outer hexagonal nut 3. For better positioning of the plate 1, the cross-sectional outer contour of the nut 3 is preferably circular, and the counter-bore 12 is a cylindrical bore and is in positioning fit with the nut 3. The disc body 1 can be better positioned through the positioning fit between the counter sink 12 and the nut 3, so that the positioning centering performance is guaranteed. At this time, the hole 13 in the disk body 1 and the pull stud 4 can be in clearance fit, so that the installation is convenient. It is of course also possible to have a threaded connection between the counter-bore 12 and the nut 3 to enable a threaded connection when the nut 3 is not in use, preventing loss. It is of course also possible to have a sliding fit between the counter bore 12 and the nut 3.
When the pin pulling device is used, after the pin pulling screw 2 or the pin pulling stud 4 is in threaded connection with the screw hole corresponding to the pin shaft, axial acting force needs to be applied to the handle part 6 to push the pin shaft to move axially to be separated from the pin shaft hole. The axial force applied to the handle part 6 can be in a lever mode or can be directly pulled by hand. For the convenience of force application, be provided with the slide bar section along pulling pin double-screw bolt 4 axial extension on preferred stalk portion 6 here, and the slide bar section is kept away from the one end of disk body 1 and is set up spacing shoulder, still establish the spacing shoulder of tup hammer 7 in order to can the axial striking on the slide bar section including the cover to when pulling pin, promote tup hammer 7 fast, tup hammer 7 utilizes inertial force, the striking is on spacing shoulder, direct force application is compared to the inertial force, the strength is bigger, it removes to change the promotion round pin axle, and then changes and realize pulling pin. For carrying convenience and for connection with the pin shaft, it is preferable that one end of the sliding rod section, which is far away from the tray body 1, is provided with a hand holding part extending axially, and the hand holding part is provided with a rubber sleeve.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A pin puller, comprising:
the handle part is provided with a pin pulling stud at one end;
the tray body is sleeved outside the pull pin stud, a plurality of strip-shaped axial through holes which are uniformly arranged around the axis of the pull pin stud and extend along the radial direction are arranged on the tray body, and the axial through holes are used for axial penetration of a pull pin screw;
and the screw cap is in threaded connection with the pull pin stud so as to detachably lock the disc body on the handle part.
2. The pin puller according to claim 1, comprising a pin puller screw, said screw being disposed through said axial bore.
3. The pin puller according to claim 1, wherein the pin puller stud is a stud having one end penetrating into the shank axial through hole and threadedly connected to a lock nut and the other end threadedly connected to the nut.
4. The pin puller according to claim 3, wherein a counterbore is provided in said disc such that said nut is inserted in said counterbore.
5. The pin puller according to claim 4, wherein the outer diameter of the threaded section of said pull stud engaging said nut is the same as the transverse width of said axial bore.
6. The pin puller according to claim 5, wherein said disc is disc shaped and is provided with four said axial through holes evenly disposed about said stud axis.
7. The pin puller according to claim 6, wherein the nut has a circular outer cross-sectional profile, and the counter bore is a cylindrical bore and is in threaded connection with the nut.
8. The pin puller of claim 7, wherein said disc body aperture is a clearance fit with said pin puller stud.
9. The pin puller according to any one of claims 1 to 8, wherein the handle is provided with a slide bar section extending axially along the pin puller stud, and a limit shoulder is provided at an end of the slide bar section remote from the disc body, and further comprising a ram fitted over the slide bar section to be able to axially strike the limit shoulder.
10. The pin puller of claim 9, wherein an end of said slider bar segment remote from said disc is provided with an axially extending hand grip.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020229456795 | 2020-12-10 | ||
| CN202022945679 | 2020-12-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112720347A true CN112720347A (en) | 2021-04-30 |
Family
ID=75603877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011501426.7A Pending CN112720347A (en) | 2020-12-10 | 2020-12-17 | Pin puller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112720347A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6601277B1 (en) * | 2002-09-13 | 2003-08-05 | Richard C. Swanson | Puller tool for bolt seals and the like |
| CN202062197U (en) * | 2010-12-28 | 2011-12-07 | 徐州重型机械有限公司 | Shaft drawing device and high-altitude fire truck with same |
| CN202480043U (en) * | 2012-02-29 | 2012-10-10 | 重庆宗学重工机械股份有限公司 | Pin puller |
| CN205363734U (en) * | 2015-12-12 | 2016-07-06 | 无锡动力工程股份有限公司 | Pin pulling device of unthreaded hole locating pin |
| CN207256139U (en) * | 2017-10-18 | 2018-04-20 | 杨荣伟 | A kind of pin removal |
-
2020
- 2020-12-17 CN CN202011501426.7A patent/CN112720347A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6601277B1 (en) * | 2002-09-13 | 2003-08-05 | Richard C. Swanson | Puller tool for bolt seals and the like |
| CN202062197U (en) * | 2010-12-28 | 2011-12-07 | 徐州重型机械有限公司 | Shaft drawing device and high-altitude fire truck with same |
| CN202480043U (en) * | 2012-02-29 | 2012-10-10 | 重庆宗学重工机械股份有限公司 | Pin puller |
| CN205363734U (en) * | 2015-12-12 | 2016-07-06 | 无锡动力工程股份有限公司 | Pin pulling device of unthreaded hole locating pin |
| CN207256139U (en) * | 2017-10-18 | 2018-04-20 | 杨荣伟 | A kind of pin removal |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210430 |