CN106969019B - Positioning device for track pin shaft of ultra-large excavator - Google Patents
Positioning device for track pin shaft of ultra-large excavator Download PDFInfo
- Publication number
- CN106969019B CN106969019B CN201710325187.6A CN201710325187A CN106969019B CN 106969019 B CN106969019 B CN 106969019B CN 201710325187 A CN201710325187 A CN 201710325187A CN 106969019 B CN106969019 B CN 106969019B
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- pin shaft
- drum
- positioning device
- shaped sleeve
- track
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- 125000006850 spacer group Chemical group 0.000 claims abstract description 21
- 230000007704 transition Effects 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000003754 machining Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 abstract description 7
- 241000219098 Parthenocissus Species 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Insertion Pins And Rivets (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
The invention discloses a positioning device of a track pin shaft of an ultra-large excavator, which comprises a pin shaft for connecting a track shoe and a positioning device for positioning the pin shaft, and is characterized in that the positioning device is horizontally arranged at the outer side end part of the pin shaft, the positioning device comprises a transition piece, a limiting piece and a fixing piece connected with the limiting piece and the transition piece, a gap is arranged between the limiting piece and the end surface of the pin shaft, the transition piece is provided with a cambered surface matched with the cambered surface of the track shoe for avoiding the arrangement of a complex installation boss on the track shoe and the machining, and the fixing piece sequentially penetrates through the limiting piece and the transition piece for fixing. The advantages are that: the spacer bush with the cambered surface is used as the transition piece, so that the complex installation boss on the creeper tread and machining are avoided, and the casting risk is reduced; the drum-shaped sleeve is adopted to axially position the track pin shaft, so that the abrasion of parts such as the pin shaft is avoided; the positioning anti-loosening device is simple in structure, convenient to assemble and disassemble and high in reliability.
Description
Technical Field
The invention relates to a positioning device for a track pin shaft of an ultra-large excavator, and belongs to the technical field of traveling devices of tracks of heavy engineering machinery.
Background
The traveling system of the ultra-large excavator generally comprises a crawler belt, a driving wheel, a thrust wheel, a drag chain wheel and a guide wheel. The crawler belt is a core component and is a carrier for converting the driving force of the walking motor into the walking power of the whole machine. The track shoe of the ultra-large excavator is generally of an integral casting type and is connected by a pin shaft penetrating through a pin hole, and the track shoe and the pin shaft are greatly stressed during walking and deform over time. Thus, the reliability of the track pin positioning determines to a large extent the reliability of the crawler.
The traditional pin shaft positioning method is mainly characterized in that only customized nuts are installed on a creeper tread near the end part of a pin shaft, or bosses with specific shapes are reserved on the creeper tread and machined, the casting process difficulty is high, the machining cost is high, the pin shaft can circumferentially rotate and axially float in the working process, the end part touches a positioning nut, the end part of the pin shaft and the positioning nut are seriously abraded, the abrasion problem after long-term use is more serious, the anti-loosening effect is poor, and the risk of falling of the pin shaft and incapability of the whole machine is higher; in addition, the positioning device is mostly disposable, and when the connected crawler belt needs to be disconnected, the positioning device needs to be cut off, which wastes time and labor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the positioning device for the track pin shaft of the ultra-large excavator, which has the advantages of compact structure, convenience in assembly and disassembly, long service life and high reliability.
In order to solve the technical problems, the invention provides a positioning device for a track pin shaft of an ultra-large excavator, which comprises a pin shaft for connecting a track shoe and a positioning device for positioning the pin shaft, and is characterized in that the positioning device is horizontally arranged at the outer side end of the pin shaft, the positioning device comprises a transition piece, a limiting piece and a fixing piece for connecting the limiting piece and the transition piece, a gap is arranged between the limiting piece and the end surface of the pin shaft, the transition piece is provided with a cambered surface matched with the cambered surface of the track shoe for avoiding the arrangement of a complex mounting boss on the track shoe and the machining, and the fixing piece sequentially penetrates through the limiting piece and the transition piece for fixing.
Furthermore, the limiting part adopts a drum-shaped sleeve to axially limit the pin shaft, the outer surface of the drum-shaped sleeve is a drum-shaped surface, two ends of the drum-shaped sleeve are conical surfaces, the middle of the drum-shaped sleeve is an arc surface, the inner side of the drum-shaped sleeve is provided with two sections of stepped holes, and the arc surface is contacted with the end surface of the pin shaft, so that the rolling friction between the end surface of the pin shaft and the drum-shaped sleeve is realized.
Furthermore, the transition piece adopts a spacer bush with a cambered surface.
Furthermore, the fixing part adopts an inner hexagon screw and a nut, wherein the inner hexagon screw sequentially penetrates through the limiting part and the transition part, the cambered surface of the transition part is adjusted to be matched with the cambered surface of the track shoe, and the nut is screwed, so that the axial positioning of the pin shaft is realized.
Furthermore, the head of the inner hexagon screw is provided with an annular boss to improve the pre-tightening effect of the screw pair, the bottom of the boss is provided with an annular groove, and the screw thread is a fine-tooth external screw thread.
Furthermore, the matching surface of the spacer bush and the track shoe is an arc surface, the matching surface of the spacer bush and the inner hexagon screw is a plane, the matching hole of the spacer bush and the inner hexagon screw 1 is a smooth hole, the upper side and the lower side are circular arcs, and the left side and the right side are straight edges.
Furthermore, the clearance between the drum-shaped outer edge of the drum-shaped sleeve and the end face of the pin shaft is arranged at 2-3 mm, the drum-shaped sleeve is in small clearance fit with the cylindrical surface of the head part of the inner hexagonal screw by means of the first section of hole of the stepped hole, can rotate freely, and is limited by means of a shaft shoulder in the axial direction.
Furthermore, the matching surface of the socket head cap screw and the drum-shaped sleeve and the drum-shaped surface of the drum-shaped sleeve are subjected to induction hardening treatment, so that the wear resistance and the service life of the socket head cap screw are improved.
The invention achieves the following beneficial effects:
according to the crawler belt plate, the spacer bush with the cambered surface is used as the transition piece between the inner hexagon screw and the crawler belt plate, so that the complex installation boss on the crawler belt plate and the machining are avoided, and the casting risk is reduced; the drum-shaped sleeve is adopted to axially position the track pin shaft, and the friction force between the end surface of the pin shaft and the drum-shaped sleeve exists in a rolling friction mode, so that the abrasion of parts such as the pin shaft and the like is avoided; the influence of manufacturing shape and position errors, installation errors, deformation of the track shoe and the pin shaft after long-term use and the like on the contact surface of the limiting part is avoided, the contact surface can bear the axial shifting force of the pin shaft all the time, and the phenomenon that the block falls or the part fails due to local stress concentration caused by edge contact or extrusion is avoided. The positioning anti-loosening device is simple in structure, convenient to assemble and disassemble and high in reliability.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a socket head cap screw;
FIG. 3 is a schematic view of a spacer;
FIG. 4 is a schematic view of a drum sleeve;
in the figure: 1. The device comprises a socket head cap screw, 2, a nut, 3, a track shoe, 4, a spacer bush, 5, a drum-shaped bush, 6, a pin shaft, 7, a unthreaded hole, 8, an arc surface, 9, an arc, 10, a straight edge, 11, a conical surface, 12, an arc surface, 13 and a stepped hole.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the positioning device for the track pin shaft of the ultra-large excavator is characterized by comprising a track shoe 3, a pin shaft 6, a nut 2, an inner hexagon screw 1, a spacer 4 and a drum-shaped sleeve 5. The device is positioned at the end part of the outer side of a pin shaft 6, is horizontally installed, after two crawler boards 3 are spliced, the pin shaft 6 sequentially penetrates through pin holes from outside to inside respectively, then an inner hexagonal screw 1 sequentially penetrates through a drum-shaped sleeve 5 and a spacer sleeve 4, the cambered surface of the spacer sleeve 4 is adjusted to be matched with the cambered surface of the crawler boards 3, and a nut 2 is screwed, so that the axial positioning of the pin shaft is realized.
Preferably, the head of the socket head cap screw 1 is provided with an annular boss to improve the pre-tightening effect of the thread pair, and the bottom of the boss is provided with an annular groove, and the thread is a fine thread external thread.
Preferably, the matching surface of the spacer 4 and the track shoe 3 is an arc surface 8, the matching surface of the spacer 4 and the socket cap screw 1 is a plane, the matching hole of the socket cap screw 1 is a smooth hole 7, the upper side and the lower side are circular arcs 9, and the left side and the right side are straight edges 10.
Preferably, the outer surface of the drum-shaped sleeve 5 is a drum-shaped surface, wherein two ends of the drum-shaped sleeve are conical surfaces 11, the middle of the drum-shaped sleeve is an arc surface 12, and the inner side of the drum-shaped sleeve is provided with two sections of stepped holes 13, namely a first section of hole at the upper end of the drum-shaped sleeve and a second section of hole at the lower end of the drum-shaped sleeve.
Preferably, the distance between the drum-shaped outer edge of the drum-shaped sleeve 5 and the end face of the pin shaft 6 is controlled to be 2-3 mm, the drum-shaped sleeve 5 is in small clearance fit with the cylindrical surface H9/f8 of the head of the hexagon socket head cap screw 1 through a first section of hole of a stepped hole, can rotate freely, and is limited axially through a shaft shoulder.
Preferably, the matching surface of the socket head cap screw 1 and the drum-shaped sleeve 5 and the drum-shaped surface of the drum-shaped sleeve 5 are both subjected to induction hardening treatment, so that the wear resistance and the service life of the socket head cap screw are improved.
The matching surface of the spacer 4 and the track shoe 3 is a cambered surface, so that the connection effectiveness is ensured, the complex installation boss and machining on the track shoe 3 are avoided, and the casting risk is reduced.
The drum-shaped sleeve 5 is used for limiting the end face of the pin shaft 6 by the drum-shaped surface, so that the influence of shape and position errors, deformation of the track shoe 3 after long-term use, bending deformation of the pin shaft 6 and the like on the contact surface of the limiting part can be avoided, a relatively ideal contact surface can always bear the axial float force of the pin shaft 6, and the phenomenon that the block falls or the parts fail due to local stress concentration caused by edge contact or extrusion is avoided. Further, after the crawler traveling device is used for a long time, even if the creeper tread 3 and the pin shaft 6 are greatly deformed, the positioning and anti-loosening device can still be conveniently disassembled, and a crawler system can be conveniently disassembled for repair or replacement.
According to the structure, the spacer bush with the cambered surface is used as the transition piece between the inner hexagon screw and the crawler plate, so that the complex installation boss on the crawler plate is avoided, the machining is avoided, the casting risk is reduced, and the pre-tightening effect of the inner hexagon screw and the nut is improved; the drum-shaped sleeve is adopted to axially position the track pin shaft, the friction force between the end surface of the pin shaft and the drum-shaped sleeve exists in a rolling friction mode, abrasion of parts such as the pin shaft is avoided, induction quenching treatment is performed on the drum-shaped sleeve and the matching surface of the drum-shaped sleeve and a fixed inner hexagon screw, and the drum-shaped sleeve can flexibly and freely rotate along with the end surface of the pin shaft for a long time; the influence of manufacturing shape and position errors, installation errors, deformation of the track shoe and the pin shaft after long-term use and the like on the contact surface of the limiting part can be avoided, the contact surface can bear the axial shifting force of the pin shaft all the time, and the phenomenon that the block falls or the part fails due to local stress concentration caused by edge contact or extrusion is avoided. This location locking device has compromise the simplification track plate structure well when guaranteeing track running gear reliability, reduces the casting risk to compact structure, dismantlement convenience, specially adapted ultra-large-scale excavator.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A positioning device for a track pin shaft of an ultra-large excavator comprises a pin shaft used for connecting a track shoe and a positioning device used for positioning the pin shaft, and is characterized in that the positioning device is horizontally arranged at the outer side end of the pin shaft, the positioning device comprises a transition piece, a limiting piece and a fixing piece connected with the limiting piece and the transition piece, a gap is formed between the limiting piece and the end face of the outer side end of the pin shaft, the transition piece is provided with a cambered surface matched with the cambered surface of the track shoe for avoiding the arrangement of a complex installation boss on the track shoe and machining the installation boss, and the fixing piece sequentially penetrates through the limiting piece and the transition piece for fixing; the limiting part adopts a drum-shaped sleeve to axially limit the pin shaft, the outer surface of the drum-shaped sleeve is a drum-shaped surface, two ends of the drum-shaped sleeve are conical surfaces, the middle of the drum-shaped sleeve is an arc surface, and the inner side of the drum-shaped sleeve is provided with two sections of stepped holes, wherein the arc surface is in contact with the end surface of the pin shaft, so that the rolling friction between the end surface of the pin shaft and the drum-shaped sleeve is realized.
2. The positioning device for the track pin shaft of the ultra-large excavator as claimed in claim 1, wherein the transition piece is a spacer bush with a cambered surface.
3. The positioning device for the track pin shaft of the ultra-large excavator as claimed in claim 2, wherein the fixing member is a socket head cap screw and a nut, wherein the socket head cap screw sequentially penetrates through the limiting member and the transition member, the cambered surface of the transition member is adjusted to match with the cambered surface of the track shoe, and the nut is screwed, so that the axial positioning of the pin shaft is realized.
4. The positioning device for the track pin shaft of the ultra-large excavator as claimed in claim 3, wherein the head of the hexagon socket head cap screw is provided with an annular boss to improve the pre-tightening effect of the thread pair, and the bottom of the boss is provided with an annular groove, and the thread is a fine external thread.
5. The positioning device for the track pin of the ultra-large excavator according to claim 3, wherein the matching surface of the spacer bush and the track shoe is an arc surface, the matching surface of the spacer bush and the inner hexagon screw is a plane, the matching hole of the spacer bush and the inner hexagon screw is a smooth hole, the upper side and the lower side of the spacer bush are circular arcs, and the left side and the right side of the spacer bush are straight edges.
6. The positioning device for the track pin shaft of the ultra-large excavator as claimed in claim 1, wherein a gap between the drum-shaped outer edge of the drum-shaped sleeve and the end surface of the pin shaft is set to be 2-3 mm, the drum-shaped sleeve is matched with a small gap between a cylindrical surface at the head of an inner hexagonal screw by virtue of a first section of hole of the stepped hole, can freely rotate and is axially limited by virtue of a shaft shoulder.
7. The positioning device for the track pin shaft of the ultra-large excavator as claimed in claim 3, wherein the matching surface of the socket head cap screw and the drum-shaped sleeve and the drum-shaped surface of the drum-shaped sleeve are subjected to induction hardening treatment so as to improve the wear resistance and prolong the service life of the positioning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710325187.6A CN106969019B (en) | 2017-05-10 | 2017-05-10 | Positioning device for track pin shaft of ultra-large excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710325187.6A CN106969019B (en) | 2017-05-10 | 2017-05-10 | Positioning device for track pin shaft of ultra-large excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106969019A CN106969019A (en) | 2017-07-21 |
| CN106969019B true CN106969019B (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710325187.6A Active CN106969019B (en) | 2017-05-10 | 2017-05-10 | Positioning device for track pin shaft of ultra-large excavator |
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| Country | Link |
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| CN (1) | CN106969019B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06156331A (en) * | 1992-11-18 | 1994-06-03 | Hitachi Constr Mach Co Ltd | Crawler |
| JPH0860701A (en) * | 1994-08-18 | 1996-03-05 | Hitachi Constr Mach Co Ltd | Crawler belt |
| CN2291348Y (en) * | 1996-11-07 | 1998-09-16 | 铁道部科学研究院通信信号研究所 | Gravity vehicle retarder |
| JP2002068035A (en) * | 2000-08-25 | 2002-03-08 | Hitachi Constr Mach Co Ltd | Connection pin coming-off preventive mechanism for crawler belt |
| CN202089139U (en) * | 2011-06-08 | 2011-12-28 | 山推工程机械股份有限公司 | Creeper treads of crawler crane |
| CN106005074A (en) * | 2016-05-27 | 2016-10-12 | 徐州徐工矿山机械有限公司 | Crawler belt of large mining excavator |
| CN206988247U (en) * | 2017-05-10 | 2018-02-09 | 徐州徐工挖掘机械有限公司 | A kind of positioner of ultra-large type crawler of excavator bearing pin |
-
2017
- 2017-05-10 CN CN201710325187.6A patent/CN106969019B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06156331A (en) * | 1992-11-18 | 1994-06-03 | Hitachi Constr Mach Co Ltd | Crawler |
| JPH0860701A (en) * | 1994-08-18 | 1996-03-05 | Hitachi Constr Mach Co Ltd | Crawler belt |
| CN2291348Y (en) * | 1996-11-07 | 1998-09-16 | 铁道部科学研究院通信信号研究所 | Gravity vehicle retarder |
| JP2002068035A (en) * | 2000-08-25 | 2002-03-08 | Hitachi Constr Mach Co Ltd | Connection pin coming-off preventive mechanism for crawler belt |
| CN202089139U (en) * | 2011-06-08 | 2011-12-28 | 山推工程机械股份有限公司 | Creeper treads of crawler crane |
| CN106005074A (en) * | 2016-05-27 | 2016-10-12 | 徐州徐工矿山机械有限公司 | Crawler belt of large mining excavator |
| CN206988247U (en) * | 2017-05-10 | 2018-02-09 | 徐州徐工挖掘机械有限公司 | A kind of positioner of ultra-large type crawler of excavator bearing pin |
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| Publication number | Publication date |
|---|---|
| CN106969019A (en) | 2017-07-21 |
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| PB01 | Publication | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20190409 Address after: 221005 39 Gaoxin Road, Xuzhou Economic Development Zone, Jiangsu Applicant after: XUZHOU XCMG MINING MACHINERY Co.,Ltd. Address before: No. 39 Gaoxin Road, Xuzhou Economic and Technological Development Zone, Jiangsu Province, 221100 Applicant before: XCMG EXCAVATOR MACHINERY Co.,Ltd. |
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