CN111185866A - Guide rail type positioning and press-fitting tool for cam shaft timing gear - Google Patents
Guide rail type positioning and press-fitting tool for cam shaft timing gear Download PDFInfo
- Publication number
- CN111185866A CN111185866A CN202010130446.1A CN202010130446A CN111185866A CN 111185866 A CN111185866 A CN 111185866A CN 202010130446 A CN202010130446 A CN 202010130446A CN 111185866 A CN111185866 A CN 111185866A
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- positioning
- camshaft
- press
- seat
- guide rail
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- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
-
- 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
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/02—Assembly jigs
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention discloses a guide rail type positioning and press-mounting tool for a timing gear of a camshaft, which comprises a workbench, wherein a guide rail is arranged on the workbench, a first positioning seat, a second positioning seat and a third positioning seat are arranged on the guide rail in a position-adjustable manner, a clamping mechanism for clamping the camshaft is arranged on the second positioning seat, a press head seat is arranged on the third positioning seat, a gear positioning structure for mounting the timing gear is arranged on the end surface of the press head seat, an axial sliding mechanism is arranged in the press head seat, and a positioning pin matched with a pin hole at one end of the camshaft is arranged on the axial sliding mechanism. The invention relates to a guide rail type positioning and press-fitting tool for a camshaft timing gear, belonging to the technical field of mechanical equipment manufacturing and assembling, wherein the guide rail type tool is adopted to ensure that the track of the timing gear is fixed in the assembling process, thereby effectively reducing the randomness of artificial installation and simultaneously improving the rigidity and the force during assembling; the camshaft adopts mechanical clamping, so the camshaft has circumferential positioning in the assembly process, and the assembly precision is high.
Description
Technical Field
The invention relates to a mechanical equipment manufacturing and assembling technology, in particular to a guide rail type positioning and press-fitting tool for a camshaft timing gear.
Background
In the process of assembling the diesel engine, when the camshaft timing gear is assembled, the timing relation between the tooth form of the timing gear and the camshaft cam needs to be ensured. Between part camshaft and timing gear, the design is gone up and is considered being connected of gear strength problem and camshaft for adopting the interference fit pressure equipment, lacks circumference navigation key, only provides both pinhole on the terminal surface in the design: the pin holes on the end face of the camshaft and the pin holes on the end face of the timing gear are required to ensure that the axes of the gear pin holes and the axes of the camshaft pin holes are coplanar during assembly so as to ensure the timing relationship between the tooth profiles of the camshaft cam and the camshaft timing gear.
Some manufacturers assemble the camshaft and the timing gear by expensive professional equipment, and the equipment is suitable for batch assembly, so that when the production is carried out in small batches, the assembly cost is too high. The guide rail type positioning and press-fitting tool for the timing gear and the camshaft of the camshaft, which is simple in structure and reliable, is invented under the condition that the timing relation between the timing gear and the camshaft is guaranteed.
In the prior art, as in the technical solution of patent application No. CN191710792767.6, the technical solution discloses a positioning and press-fitting tool for a timing gear of a camshaft, which has the following disadvantages: (1) the tool is a handheld assembling tool, the assembling process is operated, the motion track of the tool is not limited, but the tool is greatly influenced by human factors; (2) the camshaft is not clamped, so that the camshaft cannot be circumferentially positioned in the assembling process; (3) the cylindrical part of the positioning mandrel is positioned too short, so that the guidance performance is poor; (4) the positioning mandrel is circumferentially positioned by adopting a set screw, so that the precision level is low. Therefore, the technical scheme has poor consistency when the camshaft and the timing gear thereof are installed.
Disclosure of Invention
The guide rail type positioning and press-fitting tool for the timing gear of the camshaft is simple and convenient to operate, high in efficiency, low in labor intensity and high in assembly precision.
In order to achieve the purpose, the invention provides a guide rail type positioning and press-mounting tool for a timing gear of a camshaft, which comprises a workbench, wherein a guide rail is arranged on the workbench, a first positioning seat, a second positioning seat and a third positioning seat are arranged on the guide rail in a position-adjustable manner, a clamping mechanism for clamping the camshaft is arranged on the second positioning seat, a press head seat is arranged on the third positioning seat, a gear positioning structure for mounting the timing gear is arranged on the end surface of the press head seat, an axial sliding mechanism is arranged in the press head seat, and a positioning pin matched with a pin hole at one end of the camshaft is arranged on the axial sliding mechanism.
Furthermore, a counter bore matched with one end of the camshaft is arranged in the press head seat, the axial sliding mechanism comprises a positioning core shaft arranged in the counter bore, and the positioning pin is arranged on the end face of one end of the positioning core shaft.
Furthermore, the axial sliding mechanism further comprises a spring which is arranged in the counter bore and is matched with the other end of the positioning mandrel.
Furthermore, a positioning rod is arranged in the counter bore, and the spring is sleeved on the positioning rod.
As a further improvement, a guide mechanism is arranged between the hole wall of the counter bore and the outer revolution surface of the positioning mandrel, and the guide mechanism comprises a guide sliding groove which is arranged on the hole wall of the counter bore and extends axially and a limit flat key which is arranged on the outer revolution surface of the positioning mandrel.
As a further improvement, the other end of the positioning mandrel is provided with a guide groove for accommodating the spring; the positioning rod is provided with a connecting screw rod connected with the press head seat, and the positioning rod is provided with a limiting convex edge.
Furthermore, two ends of the press head seat are provided with positioning convex edges, a gear positioning structure is arranged on the positioning convex edge at one end of the press head seat, and the gear positioning structure is a pin structure penetrating through the positioning convex edges; and a connecting hole is formed in the positioning convex edge at the other end of the press head seat, and a bolt structure matched with the connecting hole is arranged on the third positioning seat.
Furthermore, a positioning boss inserted into the third positioning seat is narrowed at the other end of the press head seat, and a positioning hole matched with the positioning boss is formed in the third positioning seat.
Advantageous effects
Compared with the prior art, the guide rail type positioning and press-fitting tool for the timing gear of the camshaft has the following beneficial effects: (1) according to the guide rail type positioning and press-fitting tool for the camshaft timing gear, the guide rail type tool is adopted, the track of the timing gear is fixed in the assembling process, the randomness of manual installation is effectively reduced, and meanwhile, the rigidity and the force during assembling are improved;
(2) the camshaft is mechanically clamped, so that the camshaft is circumferentially positioned in the assembling process;
(3) the length-diameter ratio of the positioning part of the positioning mandrel cylinder is lengthened, and the positioning mandrel cylinder is matched with a gap between the positioning mandrel cylinder and an inner hole of the positioning seat, so that the guiding is good, and the precision can be effectively improved;
(4) the positioning mandrel adopts flat key positioning in circumferential positioning, a gap between a positioning mandrel cylinder and a positioning hole of the press head seat is required to be formed, and the precision grade is obviously improved.
Drawings
FIG. 1 is a front view of a guide rail type positioning and press-fitting tool for a camshaft timing gear of the present invention;
FIG. 2 is a structural cross-sectional view of a guide rail type positioning and press-fitting tool for a camshaft timing gear of the present invention;
fig. 3 is an enlarged sectional view of the third positioning seat press head base according to the present invention.
In the figure: 1. a work table; 2. a guide rail; 3. a first positioning seat; 4. a second positioning seat; 5. a third positioning seat; 6. a camshaft; 7. a clamping mechanism; 8. a press head seat; 9. a timing gear; 10. a gear positioning structure; 11. positioning pins; 12. a counter bore; 13. positioning the mandrel; 14. a spring; 15. positioning a rod; 16. a guide mechanism; 17. a guide groove; 19. a bolt structure; 20. a positioning boss; 21. and (7) positioning the holes.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
The specific embodiments of the present invention are such that: as shown in fig. 1-3, a guide rail type positioning and press-fitting tool for a timing gear of a camshaft comprises a workbench 1, a guide rail 2 is arranged on the workbench 1, a first positioning seat 3, a second positioning seat 4 and a third positioning seat 5 are arranged on the guide rail 2 in a position-adjustable manner, a clamping mechanism 7 for clamping the camshaft 6 is arranged on the second positioning seat 4, a press head seat 8 is arranged on the third positioning seat 5, a gear positioning structure 10 for mounting the timing gear 9 is arranged on the end face of the press head seat 8, an axial sliding mechanism is arranged in the press head seat 8, and a positioning pin 11 matched with a pin hole at one end of the camshaft 6 is arranged on the axial sliding mechanism. In this camshaft timing gear guide tracked location pressure equipment frock, camshaft 6 is placed at first locating seat 3, fix a position on second locating seat 4, gear 9 fixes a position when gear location structure 10 on pressure head seat 8 is adjusted well, it makes the pinhole and the locating pin 11 counterpoint of 6 one end of camshaft to rotate camshaft 6, fix camshaft 6 through clamping mechanism 7 this moment, can guarantee that timing gear 9 and camshaft 6 counterpoint, slip third locating seat 5 and make pressure head seat 8 press to camshaft 6, can be accurate with timing gear 9 on pressure head seat 8, quick installation is at camshaft 6.
The press fitting tool adopts a guide rail type tool, and the track of the timing gear is fixed in the assembly process 9, so that the randomness of manual installation is effectively reduced, and the rigidity during assembly is improved; the camshaft 6 is mechanically clamped, so that the camshaft 6 is circumferentially positioned in the assembly process; the fixture has the advantages of realizing batch production, having low manufacturing cost, avoiding the capital problem of press mounting by expensive special equipment and achieving the effect of better precision.
In this embodiment, a counter bore 12 adapted to one end of the camshaft 6 is disposed in the press head seat 8, the axial sliding mechanism includes a positioning core shaft 13 disposed in the counter bore 12, the positioning core shaft 13 is axially slidable in the press head seat 8, and the positioning pin 11 is disposed on an end face of one end of the positioning core shaft 13.
The axial sliding mechanism further comprises a spring 14 which is arranged in the counter bore 12 and is matched with the other end of the positioning core shaft 13, the third positioning seat 5 can automatically return through the reaction force of the spring 14, the press head seat 8 and the camshaft 6 can be quickly separated, manual operation is not needed, and time and labor are saved.
In the embodiment, the positioning rod 15 is arranged in the counter bore 12, the spring 14 is sleeved on the positioning rod 15, and the spring 14 is positioned to prevent the spring 14 from deflecting in compression.
In this embodiment, a guiding mechanism 16 is disposed between the hole wall of the counter bore 12 and the outer surface of revolution of the positioning core shaft 13, and the guiding mechanism 16 includes a guiding sliding groove disposed on the hole wall of the counter bore 12 and extending axially, and a limit flat key disposed on the outer surface of revolution of the positioning core shaft 13. The positioning mandrel 13 is circumferentially positioned by adopting a limiting flat key, and a circumferential gap between the limiting flat key and a positioning hole key groove of the pressing head seat 8 is required to be formed, so that the positioning mandrel 13 does not rotate, and the precision is obviously improved.
In the present embodiment, the other end of the positioning core 13 is provided with a guide slot 17 for accommodating the spring 14, and the guide slot 17 can position the spring 14 to prevent the spring 14 from deflecting in compression; the positioning rod 15 is provided with a connecting screw rod connected with the press head seat 8, and the positioning rod 15 is provided with a limiting convex edge.
The center lines of the positioning rod 15, the counter bore 12 and the positioning mandrel 13 are overlapped, so that the acting force when the timing gear 9 is pressed and mounted is ensured to be on the same straight line, the timing gear 9 is prevented from deflecting in the pressing and mounting process to scratch the cylindrical surface of the camshaft 6, and the pressing and mounting precision is ensured.
Moreover, the length and the diameter of the cylindrical positioning part of the positioning mandrel 13 are larger, so that the radial clearance between the cylinder of the positioning mandrel 13 and the counter bore 12 of the press head seat 8 can be reduced and eliminated, and the positioning mandrel 13 does not swing radially relative to the press head seat 8 when sliding.
In this embodiment, two ends of the press head seat 8 are provided with positioning convex edges, the positioning convex edges are provided with smooth positioning end faces, the positioning convex edges at one end of the press head seat 8 are provided with gear positioning structures 10, and the gear positioning structures 10 are pin structures penetrating through the positioning convex edges; the positioning convex edge at the other end of the press head base 8 is provided with a connecting hole, and the third positioning base 5 is provided with a bolt structure 19 matched with the connecting hole.
In this embodiment, the other end of the press head base 8 is narrowed to be provided with a positioning protrusion 20 inserted into the third positioning seat 5, the third positioning seat 5 is provided with a positioning hole 21 adapted to the positioning protrusion 20, and the press head base 8 can be firmly and accurately mounted on the third positioning seat 5 through the bolt 19 and the positioning protrusion 20.
The working process is as follows:
(1) the camshaft 6 is positioned and placed on the first positioning seat 3 and the second positioning seat 4 by a shaft neck, one end with an end face pin hole is close to the timing gear 9, at the moment, the camshaft 6 needs to be rotated to align the pin hole of the camshaft with the positioning pin 11 on the positioning mandrel 13, the third positioning seat 5 is pushed to move close to perform a bolt action, after the positioning pin 11 is inserted into the camshaft 6, the circumferential direction of the camshaft 6 is determined, and then a mechanical clamping handle of the clamping mechanism 7 is moved to clamp the camshaft 6;
(2) due to interference fit installation, the timing gear 9 is preheated, then the pin hole of the timing gear 9 aligns to the gear positioning structure 10 on the press head seat 8 to be inserted into a pin structure, after the timing gear 9 is inserted into the pin structure, the press head seat 8 is rapidly pushed towards the end part direction of the camshaft 6 with force, the timing gear 9 is rapidly pressed and installed, when the positioning mandrel 13 touches the end part of the camshaft 6, rapid and stable retraction yielding is achieved under the guiding and spring force effects of the cylinder of the positioning mandrel 13 and the limiting flat key, and the press-installing process of the timing gear is completed.
The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (8)
1. The utility model provides a camshaft timing gear guide tracked location pressure equipment frock, includes workstation (1), its characterized in that, be equipped with guide rail (2) on workstation (1), what can adjust the position on guide rail (2) is equipped with first positioning seat (3), second positioning seat (4) and third positioning seat (5), be equipped with pressure head seat (8) on third positioning seat (5), be equipped with gear location structure (10) of installation timing gear (9) on the terminal surface of pressure head seat (8), be equipped with axial sliding mechanism in pressure head seat (8), be equipped with locating pin (11) with the pinhole looks adaptation of camshaft (6) one end on the axial sliding mechanism.
2. The guide rail type positioning and press-fitting tool for the camshaft timing gears according to claim 1, wherein a counter bore (12) matched with one end of the camshaft (6) is formed in the press head seat (8), the axial sliding mechanism comprises a positioning mandrel (13) arranged in the counter bore (12), and the positioning pin (11) is arranged on the end face of one end of the positioning mandrel (13).
3. The guide rail type positioning and press-fitting tool for the camshaft timing gears as claimed in claim 2, wherein the axial sliding mechanism further comprises a spring (14) arranged in the counter bore (12) and adapted to the other end of the positioning mandrel (13).
4. The guide rail type positioning and press-fitting tool for the camshaft timing gears according to claim 3, wherein a positioning rod (15) is arranged in the counter bore (12), and the spring (14) is sleeved on the positioning rod (15).
5. The guide rail type positioning and press-fitting tool for the timing gears of the camshafts according to claim 2, 3 or 4, wherein a guide mechanism (16) is arranged between the hole wall of the counter bore (12) and the outer revolution surface of the positioning mandrel (13), and the guide mechanism (16) comprises a guide sliding groove which is arranged on the hole wall of the counter bore (12) and extends axially and a limit flat key which is arranged on the outer revolution surface of the positioning mandrel (13).
6. The camshaft timing gear guide rail type positioning and press-fitting tool as claimed in claim 3 or 4, wherein the other end of the positioning mandrel (13) is provided with a guide groove (17) for accommodating the spring (14); the positioning rod (15) is provided with a connecting screw rod connected with the press head seat (8), and the positioning rod (15) is provided with a limiting convex edge.
7. The guide rail type positioning and press-fitting tool for the camshaft timing gears according to claim 5, wherein positioning convex edges are arranged at two ends of the press head seat (8), a gear positioning structure (10) is arranged on the positioning convex edge at one end of the press head seat (8), and the gear positioning structure (10) is a pin structure arranged on the positioning convex edges in a penetrating manner; a connecting hole is arranged on the positioning convex edge at the other end of the press head seat (8), and a bolt structure (19) matched with the connecting hole is arranged on the third positioning seat (5).
8. The guide rail type positioning and press-fitting tool for the camshaft timing gears as claimed in claim 7, wherein the other end of the press head seat (8) is narrowed to form a positioning boss (20) inserted into the third positioning seat (5), and the third positioning seat (5) is provided with a positioning hole (21) matched with the positioning boss (20).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202010130446.1A CN111185866A (en) | 2020-02-28 | 2020-02-28 | Guide rail type positioning and press-fitting tool for cam shaft timing gear |
Applications Claiming Priority (1)
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CN202010130446.1A CN111185866A (en) | 2020-02-28 | 2020-02-28 | Guide rail type positioning and press-fitting tool for cam shaft timing gear |
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CN111185866A true CN111185866A (en) | 2020-05-22 |
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CN202010130446.1A Pending CN111185866A (en) | 2020-02-28 | 2020-02-28 | Guide rail type positioning and press-fitting tool for cam shaft timing gear |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111687785A (en) * | 2020-07-06 | 2020-09-22 | 广西玉柴机器股份有限公司 | Guide sliding base structure of camshaft gear and signal panel press-fitting tool |
CN112621650A (en) * | 2020-12-15 | 2021-04-09 | 广西玉柴机器股份有限公司 | Camshaft timing gear pressure head |
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US4688313A (en) * | 1985-12-30 | 1987-08-25 | Keller John E | Method and apparatus for removing and installing a partially fibrous camshaft gear |
DE3706745A1 (en) * | 1986-03-19 | 1987-09-24 | Reinhold Schoubye | Variable valve timing gear for 4-stroke engines |
US5247737A (en) * | 1992-03-13 | 1993-09-28 | The Torrington Company | Camshaft holding and installation method |
CN201552426U (en) * | 2009-12-15 | 2010-08-18 | 重庆美心曲轴制造有限公司 | Press mounting mold for timing gear of gasoline engine crankshaft |
CN204321508U (en) * | 2014-11-17 | 2015-05-13 | 潍柴动力股份有限公司 | The device of crankshaft timing gear hot charging |
CN204882076U (en) * | 2015-07-01 | 2015-12-16 | 潍柴动力股份有限公司 | Adjustable valve timing mechanism test bench |
CN205465862U (en) * | 2015-12-30 | 2016-08-17 | 重庆歇马机械曲轴有限公司 | Small -size engine crankshaft timing gear sectional fixture |
CN107398859A (en) * | 2017-09-05 | 2017-11-28 | 广西玉柴机器股份有限公司 | A kind of camshaft timing gear positioning pressing tool |
CN108788695A (en) * | 2018-08-07 | 2018-11-13 | 浙江卓驰机电科技有限公司 | A kind of press-loading device of engine cam signal panels |
CN212071730U (en) * | 2020-02-28 | 2020-12-04 | 广西玉柴机器股份有限公司 | Guide rail type positioning and press-fitting tool for cam shaft timing gear |
-
2020
- 2020-02-28 CN CN202010130446.1A patent/CN111185866A/en active Pending
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US4688313A (en) * | 1985-12-30 | 1987-08-25 | Keller John E | Method and apparatus for removing and installing a partially fibrous camshaft gear |
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CN108788695A (en) * | 2018-08-07 | 2018-11-13 | 浙江卓驰机电科技有限公司 | A kind of press-loading device of engine cam signal panels |
CN212071730U (en) * | 2020-02-28 | 2020-12-04 | 广西玉柴机器股份有限公司 | Guide rail type positioning and press-fitting tool for cam shaft timing gear |
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Title |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111687785A (en) * | 2020-07-06 | 2020-09-22 | 广西玉柴机器股份有限公司 | Guide sliding base structure of camshaft gear and signal panel press-fitting tool |
CN111687785B (en) * | 2020-07-06 | 2021-11-16 | 广西玉柴机器股份有限公司 | Guide sliding base structure of camshaft gear and signal panel press-fitting tool |
CN112621650A (en) * | 2020-12-15 | 2021-04-09 | 广西玉柴机器股份有限公司 | Camshaft timing gear pressure head |
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Application publication date: 20200522 |