CN204748144U - A car mill mandrel device for processing piston pin excircle - Google Patents
A car mill mandrel device for processing piston pin excircle Download PDFInfo
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- CN204748144U CN204748144U CN201520574345.8U CN201520574345U CN204748144U CN 204748144 U CN204748144 U CN 204748144U CN 201520574345 U CN201520574345 U CN 201520574345U CN 204748144 U CN204748144 U CN 204748144U
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- piston pin
- axle
- axle body
- spindle nose
- nut
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Abstract
The utility model provides a car mill mandrel device for processing piston pin excircle, mandrel and nut have, the mandrel is mainly by the axle body, the hierarchic structure that the shaft shoulder and spindle nose constitute, an axle body tip is placed in to the shaft shoulder, the axle body other end passes through the axle journal and is connected with the spindle nose, shaft shoulder one side of mandrel is equipped with the location conical surface of hugging closely with piston pin centre bore one end chamfer I, the axle body is close to a tip of spindle nose and compresses tightly set adaptation, it is equipped with the location conical surface of hugging closely with piston pin centre bore other end chamfer II to compress tightly set one end, it is equipped with and compresses tightly the conical surface to compress tightly set other end, the nut mainly comprises the section of screwing up and location section, is equipped with the arc surface in the section of location, and the nut is through making the arc surface support the conical surface that compresses tightly that sticiss tight cover with spindle nose threaded connection. The utility model provides high mandrel and piston pin axiality prevent that the mandrel from rocking in the piston pin centre bore, make the location more reliable, pull the problem on piston pin centre bore surface when solving the assembly, guarantee product quality, and it is tight firm reliable to make the piston pin press from both sides.
Description
Technical field
The utility model belongs to clamp art, is specifically related to a kind of car for machining piston pin cylindrical mill spindle unit.
Background technology
In internal combustion engine, pin-and-hole on the periphery of piston pin and piston, wrist-pin end of connecting rod inner hole, it is important working face, so the diameter dimension of piston pin cylindrical, cylindricity, side bus linearity, roughness etc. require very high, must carry out under clamped one time the processing of piston pin cylindrical, and use three-jaw or chuck clamping parts, Excircle machining all can not be completed under clamped one time, so must use frock that part is positioned clamping.Use car to grind axle in prior art and position clamping, axle be provided with location periphery, location end face and and the external screw thread of nut screw connection, axle cylindrical and gudgeon pin bore are matched in clearance, axle is located end face and piston pin end face is adjacent to, with endoporus and end face location, again with pad and nut clamping piston pin, car mill axle is arranged on lathe or grinding machine in the mode of two top location, can carry out turning or grinding to piston pin cylindrical.When using this car to grind axle, if axle cylindrical and gudgeon pin bore fit clearance are too small, then axle can be caused to load gudgeon pin bore difficult, and easily pull gudgeon pin bore surface; If axle cylindrical and gudgeon pin bore fit clearance excessive; then can cause piston pin axis and its axis disalignment; and at the outer bowlder of grinding; piston pin is subject to the larger radial load of emery wheel; axle is easily caused not stop to rock in gudgeon pin bore; finally cause the overproof or periphery of piston pin cylindrical cylindricity all to grind, cause part rejection.In actual production, use a set of new axle, use the initial stage, axle and gudgeon pin bore fit clearance less, axle loads gudgeon pin bore difficulty, often pulls gudgeon pin bore surface, and after this car mill axle uses a period of time, axle and gudgeon pin bore cooperation place are through wearing and tearing, make fit clearance become large, easily cause the described above problem causing part rejection, so need ceaselessly more to change trains mill axle, car mill axle is very short for service life, and production cost is high.Therefore be necessary to propose to improve.
Utility model content
The technical problem that the utility model solves: provide a kind of car in machining piston pin cylindrical to grind spindle unit, axle with clamping sleeve are equipped with the relative orientational cone-shaped surface be close to position piston pin, improve axle and piston pin axiality, prevent axle from rocking in piston pin centre bore, make location more reliable; Because axle axle body diameter dimension is less than piston pin center-hole diameter size, when solving assembling, pull the problem on piston pin centre bore surface, ensure product quality; In nut, the compression conical surface of arc surface and clamping sleeve is point cantact, avoids nut and clamping sleeve mutually stuck and the problem making piston pin not clamping.
The technical solution adopted in the utility model: for the car mill spindle unit of machining piston pin cylindrical, there is axle and nut, described axle is by axle body, the hierarchic structure that the shaft shoulder and spindle nose are formed, the described shaft shoulder is placed in axle body one end, the described axle body other end is connected with spindle nose by axle journal, the shaft shoulder side of described axle is provided with the orientational cone-shaped surface I be close to piston pin centre bore one chamfer I, described axle body is near an end of spindle nose and clamping sleeve adaptation, described clamping sleeve one end is provided with the orientational cone-shaped surface II be close to piston pin centre bore other end chamfering II, the described clamping sleeve other end is provided with the compression conical surface, described nut is made up of the section of tightening and positioning section, described positioning section is provided with arc surface, described nut is by the compression conical surface making arc surface push against clamping sleeve that is threaded with spindle nose.
Wherein, in described axle, orientational cone-shaped surface I tapering is identical with chamfering in piston pin I angle.
Further, on described clamping sleeve, orientational cone-shaped surface II tapering is identical with chamfering in piston pin II angle.
Further, described axle body diameter is less than piston pin center-hole diameter.
Further, axle axle body is the face of cylinder near one end of spindle nose, and the inner hole sleeve in described clamping sleeve to be contained on axle body and adaptive with the face of cylinder.
Further, described spindle nose is provided with external screw thread, and described nut interior is provided with the screwed hole screwed with external screw thread, and on described nut, the section of tightening outer surface is outer hexagon.
The utility model advantage compared with prior art:
1, the orientational cone-shaped surface I in axle and the orientational cone-shaped surface II on clamping sleeve position piston pin by pushing against piston pin two chamfer, avoid axle and piston pin disalignment, prevent axle rocking in piston pin centre bore, ensure the cylindricity of piston pin Excircle machining, improve the quality of products, accurate positioning is reliable;
2, because axle axle body diameter is less than piston pin center-hole diameter, prevent axle to pull piston pin centre bore surface when location is installed, ensure product surface quality;
3, adopt the arc surface on nut to hold out against the compression conical surface of clamping sleeve, and arc surface being point cantact with compressing the conical surface, solving nut and the mutually stuck problem of clamping sleeve, ensureing that piston pin clamping is firm;
4, the utility model structure uses two orientational cone-shaped surfaces to position piston pin, fit very firm, greatly reduce the rate of wear of orientational cone-shaped surface, improve the service life of car mill axle, reduce production cost, simple and reasonable, the common axial workpiece with endoporus all can use, the scope of application is wide, and production efficiency is high, and product rejection rate is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model central shaft;
Fig. 3 is the structural representation of clamping sleeve in the utility model;
Fig. 4 is the structural representation of nut in the utility model;
Fig. 5 is the utility model using state schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing 1-5, embodiment of the present utility model is described.
For the car mill spindle unit of machining piston pin cylindrical, as Fig. 1, 2, shown in 3, there is axle 1 and nut 3, described axle 1 is by the axle body 11 with piston pin 4 centre bore 41 adaptation, the hierarchic structure that the shaft shoulder 12 and spindle nose 13 are formed, wherein, described axle body 11 diameter is less than piston pin 4 centre bore 41 diameter, when effectively preventing from installing location, axle 1 pulls piston pin 4 centre bore 41 surface, ensure product surface quality, the described shaft shoulder 12 is placed in axle body 11 1 end, described axle body 11 other end is connected with spindle nose 13 by axle journal 14, the described shaft shoulder 12 outer round surface is processed with the clip being convenient to install switch part, switch part and frock is carried out to two orthogonal holes 19 of centering before the shaft shoulder 12 is also processed with processing, and be equipped with Type B centre bore 18 at axle 1 two ends, for the location of the utility model on lathe.The shaft shoulder 12 side of described axle 1 is provided with the orientational cone-shaped surface I 15 be close to piston pin 4 centre bore 41 1 chamfer I 42, preferably, in described axle 1, orientational cone-shaped surface I 15 tapering is identical with chamfering I 42 angle in piston pin 4, is fitted in piston pin 4 one end closely firm, described axle body 11 is adaptive near an end of spindle nose 13 and clamping sleeve 2, and concrete, described axle 1 axle body 11 is the face of cylinder 16 near one end of spindle nose 13, and the endoporus 21 in described clamping sleeve 2 to be sleeved on axle body 11 and adaptive with the face of cylinder 16, described clamping sleeve 2 one end is provided with the orientational cone-shaped surface II 22 be close to piston pin 4 centre bore 41 other end chamfering II 43, and on described clamping sleeve 2, orientational cone-shaped surface II 22 tapering is identical with chamfering II 43 angle in piston pin 4, strengthens piston pin 4 other end location firm, described clamping sleeve 2 other end is provided with and compresses the conical surface 23, described nut 3 forms primarily of the section of tightening 31 and positioning section 32, as shown in Figure 4, described positioning section 32 is provided with arc surface 34, described spindle nose 13 is provided with external screw thread 17, described nut 3 inside is provided with the screwed hole 33 screwed with external screw thread 17, described nut 3 screws by screwed hole 33 and external screw thread 17 the compression conical surface 23 making arc surface 34 push against clamping sleeve 2, wherein arc surface 34 is point cantact with compressing the conical surface 23, solve nut 3 and the mutually stuck problem of clamping sleeve 2, ensure that piston pin 4 clamps firm, in addition, on described nut 3, the section of tightening 31 outer surface is outer hexagon 35, it is more laborsaving when outer hexagon 35 makes nut 3 tighten.
During work, first central shaft 1 to be loaded in piston pin 4 and to make axle body 11 adaptive with piston pin 4 centre bore 41, orientational cone-shaped surface I 15 is close to the chamfering I 42 of piston pin 4 one end, again clamping sleeve 2 to be inserted in axle 1 and to make endoporus 21 adaptive with the face of cylinder 16, the orientational cone-shaped surface II 22 of clamping sleeve 2 is close to the chamfering II 43 of piston pin 4 other end, finally nut 3 is screwed on the spindle nose 13 of axle 1, with spanner by outer hexagon 35 fastening nut 3, the arc surface 34 of clamp nut 3 is pushed against and compresses the conical surface 23, now complete the location of piston pin 4.And then axle 1 is arranged on lathe or grinding machine by the Type B centre bore 18 at two ends, axle 1 installs clip, clip stirred by driver plate on lathe, the car mill axle being fixed with piston pin 4 rotated, thus carries out turning or grinding to the cylindrical of piston pin 4.
The utility model is positioned by the orientational cone-shaped surface I 15 in axle 1 and the II 22 pairs of piston pins 4 of the orientational cone-shaped surface on clamping sleeve 2, avoid axle 1 and piston pin 4 disalignment, prevent axle 1 rocking in piston pin 4 centre bore 41, ensure the cylindricity of piston pin 4 Excircle machining, improve the quality of products, accurate positioning is reliable, and greatly reduce the rate of wear of orientational cone-shaped surface, improve the service life of car mill axle, reduce manufacturing cost, simple and reasonable, the common axial workpiece with endoporus all can use, the scope of application is wide, production efficiency is high, product rejection rate is low.
Above-described embodiment, just preferred embodiment of the present utility model, is not used for limiting the utility model practical range, therefore all equivalence changes done with content described in the utility model claim, all should be included within the utility model right.
Claims (6)
1. for the car mill spindle unit of machining piston pin cylindrical, there is axle (1) and nut (3), described axle (1) is by axle body (11), the hierarchic structure that the shaft shoulder (12) and spindle nose (13) are formed, the described shaft shoulder (12) is placed in axle body (11) end, described axle body (11) other end is connected with spindle nose (13) by axle journal (14), it is characterized in that: the shaft shoulder (12) side of described axle (1) is provided with the orientational cone-shaped surface I (15) be close to piston pin (4) centre bore (41) chamfer I (42), described axle body (11) is near an end of spindle nose (13) and clamping sleeve (2) adaptation, described clamping sleeve (2) one end is provided with the orientational cone-shaped surface II (22) be close to piston pin (4) centre bore (41) other end chamfering II (43), described clamping sleeve (2) other end is provided with and compresses the conical surface (23), described nut (3) is made up of the section of tightening (31) and positioning section (32), described positioning section (32) is provided with arc surface (34), described nut (3) is by the compression conical surface (23) making arc surface (34) push against clamping sleeve (2) that is threaded with spindle nose (13).
2. the mill of the car for machining piston pin cylindrical spindle unit according to claim 1, is characterized in that: upper orientational cone-shaped surface I (15) tapering of described axle (1) is identical with chamfering I (42) angle in piston pin (4).
3. the mill of the car for machining piston pin cylindrical spindle unit according to claim 1 and 2, is characterized in that: upper orientational cone-shaped surface II (22) tapering of described clamping sleeve (2) is identical with chamfering II (43) angle in piston pin (4).
4. the mill of the car for machining piston pin cylindrical spindle unit according to claim 3, is characterized in that: described axle body (11) diameter is less than piston pin (4) centre bore (41) diameter.
5. the mill of the car for machining piston pin cylindrical spindle unit according to claim 4, it is characterized in that: axle (1) axle body (11) is the face of cylinder (16) near one end of spindle nose (13), it is upper and adaptive with the face of cylinder (16) that the endoporus (21) in described clamping sleeve (2) is sleeved on axle body (11).
6. the mill of the car for machining piston pin cylindrical spindle unit according to claim 5, it is characterized in that: described spindle nose (13) is provided with external screw thread (17), described nut (3) inside is provided with the screwed hole (33) screwed with external screw thread (17), and on described nut (3), the section of tightening (31) outer surface is outer hexagon (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520574345.8U CN204748144U (en) | 2015-08-03 | 2015-08-03 | A car mill mandrel device for processing piston pin excircle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520574345.8U CN204748144U (en) | 2015-08-03 | 2015-08-03 | A car mill mandrel device for processing piston pin excircle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204748144U true CN204748144U (en) | 2015-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520574345.8U Active CN204748144U (en) | 2015-08-03 | 2015-08-03 | A car mill mandrel device for processing piston pin excircle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364710A (en) * | 2015-12-03 | 2016-03-02 | 重庆望江工业有限公司 | Grinding and clamping device for large hollow shaft part |
| CN110370188A (en) * | 2019-05-31 | 2019-10-25 | 武汉船用机械有限责任公司 | For processing the fixture and clamping method of air introduction |
| CN110518755A (en) * | 2019-08-23 | 2019-11-29 | 哈尔滨电气动力装备有限公司 | Large-size machine detachable-shaft dynamic balancing tooling device |
-
2015
- 2015-08-03 CN CN201520574345.8U patent/CN204748144U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364710A (en) * | 2015-12-03 | 2016-03-02 | 重庆望江工业有限公司 | Grinding and clamping device for large hollow shaft part |
| CN110370188A (en) * | 2019-05-31 | 2019-10-25 | 武汉船用机械有限责任公司 | For processing the fixture and clamping method of air introduction |
| CN110370188B (en) * | 2019-05-31 | 2021-06-15 | 武汉船用机械有限责任公司 | Clamp for machining air inlet pipe and clamping method |
| CN110518755A (en) * | 2019-08-23 | 2019-11-29 | 哈尔滨电气动力装备有限公司 | Large-size machine detachable-shaft dynamic balancing tooling device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |