CN108161408B - Connecting rod bush push in device - Google Patents
Connecting rod bush push in device Download PDFInfo
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- CN108161408B CN108161408B CN201711436129.7A CN201711436129A CN108161408B CN 108161408 B CN108161408 B CN 108161408B CN 201711436129 A CN201711436129 A CN 201711436129A CN 108161408 B CN108161408 B CN 108161408B
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- mandrel
- collet
- connecting rod
- bushing
- press
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
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Abstract
The invention discloses a connecting rod bushing press-in device, which comprises: the support is provided with a cylinder; one end of the mandrel is connected with the air cylinder, and the other end of the mandrel is provided with a cone; the elastic chuck is sleeved on the conical part in an adaptive manner, the upper end face of the elastic chuck abuts against the support, the mandrel moves upwards, and the elastic chuck expands outwards; the pressing lining sleeve ring is sleeved on the upper part of the elastic chuck, the upper end face of the pressing lining sleeve ring abuts against the bracket, and the lower end face of the pressing lining sleeve ring is provided with an inclined plane matched with the bushing to be pressed in; and the elastic positioning assembly can be radially and movably arranged in the cone part, and the other end of the elastic positioning assembly abuts against the oil hole to be pressed into the bushing. The invention aims to provide a connecting rod bushing pressing-in device which is convenient and quick to operate and reduces cost.
Description
Technical Field
The invention relates to an engine component assembly technology, in particular to a connecting rod bushing pressing-in device.
Background
The connecting rod is a stressed moving part connected with the piston of the engine and has enough strength under the action of reciprocating motion in the cylinder, so that a bushing embedded in an inner hole of the small end of the connecting rod needs to be durable and reliable. The existing tool adopts end face positioning, an inner hole is in clearance fit, the end face of the bushing and the inner hole are high in required precision, and otherwise, accurate positioning cannot be achieved. The patent document with the application number of 201320808878.9 discloses a 'bevel-cutting type connecting rod bushing pressing device with an automatic positioning function', which is positioned by a positioning sleeve and a steel ball, so that the requirement on the precision of a bushing is high, the rejection rate is high, and a large amount of cost is consumed; in addition, a detection sleeve is additionally arranged, if the detection sleeve can be arranged in the pressure head and the positioning shaft, the pressure head is aligned with the clamp, and if the detection sleeve cannot be arranged in the pressure head and the positioning shaft, the sleeve pressing device needs to be readjusted, so that the operation is complex and a large amount of time is consumed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a connecting rod bushing pressing-in device which is convenient and quick to operate and reduces the cost.
The purpose of the invention is realized by adopting the following technical scheme:
the invention provides a connecting rod bush press-in device, comprising: the support is provided with a cylinder; one end of the mandrel is connected with the air cylinder, and the other end of the mandrel is provided with a cone; the elastic chuck is sleeved on the tapered part in an adaptive mode, the upper end face of the elastic chuck abuts against the support, and when the mandrel moves upwards, the elastic chuck expands outwards; the pressure lining sleeve ring is sleeved on the upper part of the elastic chuck, the upper end face of the pressure lining sleeve ring abuts against the bracket, and the lower end face of the pressure lining sleeve ring is provided with an inclined plane matched with the bushing to be pressed in; and the elastic positioning assembly can be movably arranged in the cone part in the radial direction, and the other end of the elastic positioning assembly abuts against the oil hole of the bush to be pressed in.
Further, the positioning device also comprises a plurality of angular positioning blocks which are arranged around the periphery of the elastic chuck at equal intervals and abut against the elastic chuck.
Furthermore, the lower end of the angular positioning block is provided with an iron-absorbing magnetic steel component.
Further, the inclined plane of the pressure lining lantern ring is provided with a step with the diameter smaller than or equal to the outer diameter of the lining.
Furthermore, the elastic positioning assembly comprises an elastic element and a steel ball connected with the elastic element, and the diameter of the steel ball is larger than that of the oil hole to be pressed into the bushing.
The guide sleeve is sleeved on the mandrel and comprises a first end and a second end opposite to the first end, the diameter of the first end of the guide sleeve is larger than that of the second end, part of the first end is embedded into the support from the lower surface of the support, the lower surface of the first end is abutted to the upper surface of the elastic chuck, and the second end is located between the elastic chuck and the mandrel and fixedly connected with the elastic chuck.
Further, the mandrel further comprises a first part and a second part which are connected with the conical part, the first part is connected with the cylinder, the guide sleeve is sleeved on the first part, and the second part is sleeved with a protective sleeve which is abutted to the lower end of the elastic chuck.
The upper surface of the jacket abuts against the lower surface of the support, the inner wall of the jacket abuts against the guide sleeve, the elastic chuck and the outer wall of the lining pressing sleeve ring, the jacket and the elastic chuck are fixed in a threaded mode, and the upper end face of the lining pressing sleeve ring abuts against the jacket.
Further, the angular positioning block extends through the press-fit collar to abut and fix an upper end of the angular positioning block against a lower surface of the collet.
Further, in a position abutting against the press lining sleeve ring, the elastic chuck is provided with a groove extending towards the inner wall of the elastic chuck, the groove and the press lining sleeve ring form an accommodating cavity, and each angular positioning block is partially accommodated in the accommodating cavity.
Compared with the prior art, the invention has the beneficial effects that:
the mandrel is provided with a conical part, the diameter of the lower end of the conical part is larger than that of the upper end of the conical part, the outer side of the conical part is provided with an elastic chuck which abuts against the inner wall of a lining, the mandrel is also provided with a lining pressing lantern ring which abuts against the upper end surface of the lining, and an elastic positioning assembly which is fixed in the mandrel and one end of which abuts against the oil hole of the lining, when the mandrel is tensioned by an oil cylinder to move upwards, the elastic chuck expands outwards to abut against the inner wall of the lining, and the lining is limited; an elastic positioning assembly capable of moving along the radial direction of the mandrel is further arranged in the conical part of the mandrel, and one end of the elastic positioning assembly extends to abut against the bushing oil hole, so that the bushing is fixed in the circumferential direction and does not rotate around the mandrel, and 1 degree of freedom is limited; the upper portion of collet still is equipped with the pressure lining lantern ring, presses the lining lantern ring and supports and press the bush and make the bush not take place to reciprocate, further restricts 1 degree of freedom, and then realizes the location of bush hole, guarantees the laminating degree requirement after the bush impresses simultaneously, the cost is reduced moreover.
Drawings
FIG. 1 is a cross-sectional view of a connecting rod bushing press-in apparatus of the present invention;
FIG. 2 is a sectional top view of the mandrel and the elastic locating member of the connecting rod bush fitting-in apparatus according to the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
fig. 4 is a view of the connecting rod and bushing in combination.
In the figure: 1. a support; 2. an upper plate; 3. a cylinder; 4. a lower plate; 6. pressing a lining lantern ring; 7. a step; 8. an elastic collet; 9. a groove; 10. a mandrel; 11. a first portion; 12. a pyramid part; 13. a second portion; 14. an aperture; 131. a connecting portion; 132. an end portion; 20. an elastic positioning component; 21. an elastic element; 22. steel balls; 30. a guide sleeve; 31. a first end; 32. a second end; 40. a jacket; 50. angular positioning blocks; 51. a magnet steel assembly; 60. a protective sleeve; 100. a bushing; 200. a connecting rod.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
Referring to fig. 1, 2, and 3, the present invention provides a connecting rod bush press-in apparatus including a holder 1, a mandrel 10, a collet 8, a press-fit collar 6, and a resilient positioning assembly 20. Wherein, support 1 includes upper plate 2 and with upper plate 2 fixed connection's hypoplastron 4, and is connected with cylinder 3 on the upper plate 2.
Further, the mandrel 10 is connected with the cylinder 3 and the mandrel 10 includes a tapered portion 12, one end of the mandrel 10 passes through the lower plate 2 to be connected with the cylinder 3, the other end of the mandrel 10 is provided with a tapered portion 12, and the cylinder 3 drives the mandrel 10 to move up and down. Wherein, the mandrel 10 further comprises a first part 11 and a second part 13 connected with a cone part 12, the first part 11 is connected with the cylinder 3, the diameter of one end of the cone part 12 connected with the first part 11 is smaller than that of the other end, and a bushing 100 (shown by a dotted line in fig. 1 and 3) is sleeved on the cone part 12.
Further, a press-fit ring sleeve 6 is provided at an upper portion of the collet 8, and an upper end surface of the press-fit ring sleeve 6 abuts against the holder 1, a lower end surface of the press-fit ring sleeve 6 abuts against an upper end surface of the bush 100 to be pressed in, and a lower end surface of the press-fit ring sleeve 6 is provided with an inclined surface adapted to the bush 100 to be pressed in, thereby restricting up and down movement of the bush 100.
Further, the collet 8 is fitted over the tapered portion 12 between the tapered portion 12 and the bushing 100, and the upper end surface of the collet 8 abuts against the holder 1, wherein the mandrel 10 moves upward, and the collet 8 expands outward and presses against the inner wall of the bushing 100 to be pressed in. It will be appreciated that the collet 8 is located partly between the bushing 100 to be pressed into and the tapered part 12 and partly between the bushing collar 6 and the first part 11 of the mandrel 10. Wherein the mandrel 10 moves upward and the larger diameter end of the tapered portion 12 presses the collet 8 to expand outward, thereby limiting the bushing 4 degrees of freedom and allowing the bushing 100 to achieve internal bore positioning.
In addition, an elastic positioning member 20 is radially movably disposed in the tapered portion 12, and the other end of the elastic positioning member 20 abuts against the oil hole to be pressed into the bush 100. Further, the elastic positioning assembly 20 comprises an elastic element 21 and a steel ball 22 connected with the elastic element 21, wherein the elastic element 21 is fixed with the conical part 12, the steel ball 22 abuts against the oil hole to be pressed into the bush, and the diameter of the steel ball 22 is larger than that of the oil hole to be pressed into the bush. That is, the elastic positioning assembly 20 includes an elastic member 21 having one end fixed in the spindle 10 and a steel ball 22 connected to the other end of the elastic member 21, the other end of the elastic member 21 extends into the collet 8, the steel ball 22 is partially located in the collet 8, and the diameter of the steel ball 22 is larger than the oil hole of the bush. That is, the mandrel 10 is provided with a hole 14 therein, and the collet is provided with a hole coaxial with the hole 14 therein so that the elastic member 21 and the steel balls 22 reciprocate therein.
It will be appreciated that the resilient element 21 may reciprocate within the collet 8 and the tapered portion 12, with the steel balls 22 being partially external to the collet 8 when the resilient element 21 is in the free state; when the elastic chuck 8 is sleeved in the bushing, the inner wall of the bushing presses against the steel ball 22, so that the steel ball 22 completely enters the elastic chuck 8 and compresses the elastic element 21; when the oil hole of the bush is aligned with the steel ball 22, the steel ball 22 partially extends into the oil hole of the bush under the restoring force of the elastic element 21, and the diameter of the steel ball 22 is larger than that of the oil hole, so that the rotation of the bush around the mandrel 10 can be well limited.
According to the above embodiment, the mandrel 10 is provided with the taper part 12, the diameter of the lower end of the taper part 12 is larger than that of the upper end, the outside of the taper part 12 is provided with the elastic chuck 8 which presses against the inner wall of the bush, the mandrel 10 is also provided with the lining pressing sleeve ring 6 which abuts against the upper end surface of the bush, and the elastic positioning assembly 20 which is fixed inside the mandrel 10 and one end of which presses against the oil hole of the bush, when the oil cylinder tightens the mandrel 10 to move upwards, the elastic chuck 8 expands outwards to press against the inner wall of the bush, and 4 degrees of freedom of the; an elastic element 21 is further fixed in the tapered part 12 of the mandrel 10, and a steel ball 22 at the end part of the elastic element 21 abuts against an oil hole of the bush, so that the bush does not rotate around the mandrel 10, and 1 degree of freedom is limited; the upper end of bush still is equipped with the pressure lining lantern ring 6, presses the lining lantern ring 6 to support and presses the bush to make the bush not take place to reciprocate, further restricts 1 degree of freedom, and then realizes the location of bush hole, guarantees the laminating degree requirement after the bush impresses simultaneously, the cost is reduced moreover.
Further, with reference to fig. 1 and 4, the lower surface of the press liner collar 6 is provided with a step 7 having a diameter less than or equal to the outer diameter of the liner, optionally the step 7 has a height of 0.6 mm. It should be understood that the inclination angle of the lower end face of the press lining sleeve ring 6 is consistent with the inclination angle of the upper end face of the bush, so that after the elastic chuck 8 and the press lining sleeve ring 6 are simultaneously tightly attached to the bush, when the cylinder 3 drives the mandrel 10 to move downwards to enter the inner hole of the small end of the connecting rod 200, the bush is pressed into the small end of the connecting rod by 0.6 mm.
According to an embodiment of the present invention, referring to fig. 1, the link bushing pressing device further includes a guide sleeve 30, the guide sleeve 30 is sleeved on the mandrel 10, wherein the guide sleeve 30 includes a first end 31 and a second end 32 opposite to the first end 31, wherein the first end 31 is partially embedded into the lower plate 2 from the lower surface of the lower plate 2, and the second end 32 is located between the collet 8 and the mandrel 10 and is fixedly connected with the collet 8. Further, the diameter of the first end 31 of the guide sleeve 30 is larger than that of the second end 32, and the lower surface of the first end 31 abuts against the upper surface of the collet 8. And the upper end face of the first end 31 of the guide bush 30 abuts against the lower plate 4 and the lower end face of the first end 31 of the guide bush 30 abuts against the collet 8, thereby ensuring that the guide bush 30 can be stably held outside the mandrel 10. Therefore, when the mandrel 10 moves up and down under the driving of the cylinder 3, the guide sleeve 30 plays a guiding role so that the up-and-down movement of the mandrel 10 is not deviated.
According to an embodiment of the invention, referring again to fig. 1, the mandrel 10 further comprises a second portion 13 connected to the tapered portion 12, the second portion 13 being sheathed with a protective sleeve 60 abutting the lower end of the collet 8. It should be understood that the second portion 13 is connected to the end of the tapered portion 12 having the larger diameter, and the second portion 13 includes a connecting portion 131 connected to the larger diameter of the tapered portion 12 and an end portion 132 connected to the connecting portion 131 and having a diameter larger than that of the connecting portion 131, the protective sleeve 60 is sleeved on the connecting portion, the lower end surface of the protective sleeve 60 abuts against the upper end surface of the end portion 132, and the upper end surface of the protective sleeve 60 abuts against the collet 8 so that the collet 8 does not move downward.
According to an embodiment of the present invention, referring to fig. 1 and 3, the link bush pressing means further includes a collet 40, an upper surface of the collet 40 abuts against a lower surface of the lower plate 2, and an inner wall of the collet 40 abuts against the guide bush 30, the collet 8, and an outer wall of the bush ring 6, wherein the collet 40 is screw-fixed with the collet 8, thereby fixing the guide bush 30, the collet 8. Also, the upper end face of the press-fit collar 6 abuts against the collet 40, that is, the upper end of the press-fit collar 6 is located inside the collet 40, so that both the upper end face and the side wall of the upper end of the press-fit collar 6 abut against the collet 40 to fix the press-fit collar 6.
According to an embodiment of the present invention, referring to fig. 2 and 3, the connecting rod bushing press-in device further includes a plurality of angular positioning blocks 50 arranged around the circumference of the collet 8 at equal intervals and abutting against the collet 8, the angular positioning blocks 50 extending through the press-fit collar 6 to abut and fix the upper ends of the angular positioning blocks 50 against the lower surface of the collet 40. It should be understood that the upper end surface of the angular positioning block 50 abuts against and is fixed to the lower surface of the collet 40, and the angular positioning block 50 extends through the press-fit collar 6, so that the angular positioning block 50 can be stably held fixed, and the angular positioning block 50 is pressed against the collet 8 so that the collet 8 does not rotate.
Further, the number of the angular positioning blocks 50 is three, and the angular positioning blocks are distributed at equal intervals along the axis of the collet 8.
Further, with reference to fig. 1, in the position abutting against the pressure lining collar 6, the collet 8 is provided with a recess 9 extending towards the inner wall of the collet 8, the recess 9 and the pressure lining collar 6 forming a housing cavity in which each angular positioning block 50 is partially housed, that is to say the part of the angular positioning block 50 extending from the pressure lining collar 6 is held in the housing cavity and abuts against the side wall of the collet 8, thereby ensuring that the collet 8 does not rotate.
Further, referring to fig. 3, the lower end of the angular positioning block 50 is provided with a magnet steel assembly 51, so as to apply an upward attractive force to the bushing, further stabilize the bushing, and prevent the bushing from moving downward.
According to the above embodiment, the oil cylinder is adopted to tension the mandrel 10, so that the mandrel 10 slides up and down in the guide sleeve 30, when the mandrel 10 is tensioned upwards, the elastic chuck 8 expands outwards to limit 4 degrees of freedom of the workpiece-bushing, and thus, the inner hole positioning is realized; the bush rotates around the mandrel 10 and is positioned by the spring steel balls 22, and 1 degree of freedom is limited; moving up and down the mandrel 10 is positioned by the bushing collar, limiting 1 degree of freedom and ultimately controlling 6 degrees of directional freedom. The improvement relieves the high-precision requirement on the inner hole and the end face of the bushing, not only reduces the processing cost of the bushing, but also ensures the requirement on the fitting degree of the bushing after being pressed in, and ensures that the bushing is more convenient and faster to install.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (9)
1. A connecting rod bushing press-in device, comprising:
the support is provided with a cylinder;
one end of the mandrel is connected with the air cylinder, and the other end of the mandrel is provided with a cone;
the elastic chuck is sleeved on the tapered part in an adaptive mode, the upper end face of the elastic chuck abuts against the support, and when the mandrel moves upwards, the elastic chuck expands outwards;
the pressure lining sleeve ring is sleeved on the upper part of the elastic chuck, the upper end face of the pressure lining sleeve ring abuts against the bracket, and the lower end face of the pressure lining sleeve ring is provided with an inclined plane matched with the bushing to be pressed in;
the guide sleeve is sleeved on the mandrel and comprises a first end and a second end opposite to the first end, the diameter of the first end of the guide sleeve is larger than that of the second end, part of the first end is embedded into the support from the lower surface of the support, the lower surface of the first end is abutted against the upper surface of the elastic chuck, and the second end is located between the elastic chuck and the mandrel and fixedly connected with the elastic chuck; and
a resilient locating assembly radially movably disposed within the cone.
2. The connecting rod bushing press-in apparatus according to claim 1, further comprising a plurality of angular positioning blocks arranged at equal intervals around a circumference of the collet and abutting against the collet.
3. The connecting rod bushing pressing device according to claim 2, wherein a magnet steel magnet assembly is arranged at the lower end of the angular positioning block.
4. The connecting rod bushing press-in apparatus according to claim 1 or 2, wherein the inclined surface of the bushing collar is provided with a step having a diameter smaller than or equal to an outer diameter of the bushing.
5. The connecting rod bushing pressing device according to claim 1 or 2, wherein the elastic positioning assembly includes an elastic element and a steel ball connected with the elastic element, and a diameter of the steel ball is larger than a diameter of the oil hole of the bushing to be pressed.
6. The connecting rod bushing pressing device according to claim 1, wherein the mandrel further includes a first portion and a second portion connected to the tapered portion, the first portion is connected to the cylinder, the guide sleeve is sleeved on the first portion, and the second portion is sleeved with a protective sleeve abutting against a lower end of the collet.
7. The connecting rod bushing pressing device according to claim 2, further comprising a jacket, wherein an upper surface of the jacket abuts against a lower surface of the bracket, an inner wall of the jacket abuts against the guide sleeve, the collet, and an outer wall of the press-fit collar, wherein the jacket is screwed with the collet, and an upper end face of the press-fit collar abuts against the jacket.
8. The connecting rod bushing press-in apparatus according to claim 7, wherein the angular positioning block extends through the bushing collar to abut and secure an upper end of the angular positioning block against a lower surface of the collet.
9. The connecting rod bushing press-in device according to claim 7, wherein, in the position abutting against the press-fit collar, the collet is provided with a groove extending towards an inner wall of the collet, the groove forming with the press-fit collar a receiving cavity, each of the angular positioning blocks being partially received in the receiving cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711436129.7A CN108161408B (en) | 2017-12-26 | 2017-12-26 | Connecting rod bush push in device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711436129.7A CN108161408B (en) | 2017-12-26 | 2017-12-26 | Connecting rod bush push in device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108161408A CN108161408A (en) | 2018-06-15 |
| CN108161408B true CN108161408B (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711436129.7A Active CN108161408B (en) | 2017-12-26 | 2017-12-26 | Connecting rod bush push in device |
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| CN (1) | CN108161408B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112571361A (en) * | 2020-12-21 | 2021-03-30 | 王翔 | Screw drapes over one's shoulders head self-lock device |
| CN112643316B (en) * | 2021-01-14 | 2022-08-02 | 中国航发长春控制科技有限公司 | Precision part positioning and assembling device |
| CN114453865B (en) * | 2022-02-18 | 2023-02-03 | 杭州九龙机械制造有限公司 | Press bush frock integrated device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5129253A (en) * | 1990-01-26 | 1992-07-14 | Bell Helicopter Textron Inc. | Antifretting coating for a bushing in a coldworked joint |
| CN201261118Y (en) * | 2008-09-26 | 2009-06-24 | 广东四会实力连杆有限公司 | Press mounting apparatus for wedge shaped connecting rod bushing |
| CN202292039U (en) * | 2011-09-22 | 2012-07-04 | 广州市番禺科腾工业有限公司 | Push mounting and finishing device for connecting rod bushing |
| CN203665023U (en) * | 2013-12-10 | 2014-06-25 | 东风朝阳朝柴动力有限公司 | Inclined-cutting type connecting rod lining press-in device with automatic positioning function |
| CN203726106U (en) * | 2014-03-17 | 2014-07-23 | 重庆高金实业有限公司 | Connecting rod bush press fitting die |
| CN104308508B (en) * | 2014-09-25 | 2017-06-16 | 黄山南科汽车传感器有限公司 | A kind of sensor inner core bush fitting frock |
| CN105436867B (en) * | 2015-12-29 | 2018-02-13 | 博众精工科技股份有限公司 | A kind of automatic leading mechanism on bushing press |
| CN205764771U (en) * | 2016-05-28 | 2016-12-07 | 南宫市精强连杆有限公司 | Connecting rob bushing pressing machine |
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2017
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