CN203792260U - Engine gudgeon pin pressing aid - Google Patents
Engine gudgeon pin pressing aid Download PDFInfo
- Publication number
- CN203792260U CN203792260U CN201420217157.5U CN201420217157U CN203792260U CN 203792260 U CN203792260 U CN 203792260U CN 201420217157 U CN201420217157 U CN 201420217157U CN 203792260 U CN203792260 U CN 203792260U
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- CN
- China
- Prior art keywords
- diameter
- piston pin
- pin
- cylinder axis
- gudgeon pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides an engine gudgeon pin pressing aid. The engine gudgeon pin pressing aid comprises a stress part and a guide part, the stress part is of step round shaft structure comprising a holding section, a gudgeon pin matching section and a threaded section. The threaded section is provided with an outer thread. The guide part comprises a first cylindrical shaft and a second cylindrical shaft, the second cylindrical shaft is provided with an inner threaded hole matched with the outer thread on the thread section, the diameter of the first cylindrical shaft is smaller than that of the second cylindrical shaft, and the diameter of the second cylindrical shaft is smaller than that of a gudgeon pin hole and also smaller than that of a pin hole of a small end of a connecting rod. The engine gudgeon pin pressing aid is provided with the guide part, before a semifloating gudgeon pin is pressed by a pressing machine, the guide part is inserted into the gudgeon pin hole and the pin hole of the small end of the connecting rod, so that positioning can be accurately realized, and pressing quality of the gudgeon pin is effectively improved.
Description
Technical field
The utility model relates to technical field of tooling clamps, is specifically related to a kind of engine gudgeon pin assistant pressing tool.
Background technology
Piston rod group is mainly made up of piston, piston ring, piston pin and connecting rod etc., is one of vitals of engine, and the quality of its assembly quality has larger impact to the overall performance of engine.Wherein piston pin is cylindrical pin, and its effect is by the small end of connecting rod pin-and-hole on piston pin hole and small end of connecting rod on piston, and piston and small end of connecting rod are linked together, and passes to connecting rod with the gas load that piston is born.
Piston pin can be divided into two kinds of full floating wrist pin and semi-floating piston pins according to the matching relationship of piston pin and piston hole and piston pin and small end of connecting rod pin-and-hole.Full floating wrist pin refers between piston pin and piston hole as matched in clearance, and between piston pin and small end of connecting rod pin-and-hole, is also matched in clearance, in the time assembling this kind of piston pin, do not need to press-fit and just can easily complete assembling.It is matched in clearance that semi-floating piston pin refers between piston pin and piston hole, and is interference fit between piston pin and small end of connecting rod pin-and-hole.
In prior art, conventionally only complete the installation to semi-floating piston pin by a forcing press, in the time press-fiting, can not position exactly, thereby easily piston pin is pressed askewly, cause press-fiting quality lower, even can cause the damage of piston, piston pin and small end of connecting rod.
Utility model content
The purpose of this utility model is to provide a kind of engine gudgeon pin assistant pressing tool, locates inaccurate problem to solve semi-floating piston pin in prior art in the time press-fiting.
For achieving the above object, the utility model provides following technical scheme:
A kind of engine gudgeon pin assistant pressing tool, it comprises part of the force and targeting part; Described part of the force is ladder circular shaft structure, and described ladder circular shaft structure comprises that holding section, piston pin coordinate section and thread segment; On described thread segment, be provided with external screw thread; Described targeting part comprises the first cylinder axis and the second cylinder axis, is provided with the internal thread hole matching with the described external screw thread on described thread segment on described the second cylinder axis; The diameter of described the first cylinder axis is less than the diameter of described the second cylinder axis; The diameter of described the second cylinder axis is less than the diameter of piston pin hole, and is less than the diameter of small end of connecting rod pin-and-hole.
Preferably, between described piston pin cooperation section and the endoporus of piston pin, be matched in clearance.
Preferably, the diameter of described thread segment is less than the diameter of the endoporus of piston pin.
Preferably, the difference between the diameter of described thread segment and the diameter of the endoporus of piston pin at 4mm between 6mm.
Preferably, the one end that is provided with described internal thread hole on described the second cylinder axis has piston pin mating surface.
Preferably, between described the first cylinder axis and described the second cylinder axis, be connected by frustum cone structure.
Preferably, the diameter of described holding section is less than the diameter of the outer surface of piston pin.
Preferably, on described holding section, be provided with annular knurl.
The beneficial effects of the utility model are:
Engine gudgeon pin assistant pressing tool of the present utility model, it has targeting part and part of the force, before utilizing forcing press to press-fit semi-floating piston pin, its targeting part is inserted in piston pin hole and small end of connecting rod pin-and-hole, thereby make can realize more exactly location in the time press-fiting, and then effectively improved the quality that press-fits of piston pin.
Brief description of the drawings
The schematic diagram of the engine gudgeon pin assistant pressing tool that Fig. 1 provides for the utility model embodiment in the time press-fiting state.
The structural representation of part of the force in the engine gudgeon pin assistant pressing tool that Fig. 2 provides for the utility model embodiment.
The structural representation of targeting part in the engine gudgeon pin assistant pressing tool that Fig. 3 provides for the utility model embodiment.
The structural representation of the piston pin that Fig. 4 provides for the utility model embodiment.
The schematic diagram of the engine gudgeon pin assistant pressing tool that Fig. 5 provides for the utility model embodiment in the time of installment state.
Mark in accompanying drawing:
1, part of the force 2, targeting part 3, piston pin 4, piston 5, connecting rod
6, holding section 7, piston pin coordinate section 8, thread segment 9, the first cylinder axis
10, frustum cone structure 11, the second cylinder axis 12, internal thread hole 13, endoporus
Detailed description of the invention
As shown in Figure 1 to Figure 3, the engine gudgeon pin assistant pressing tool that the utility model embodiment provides, comprises part of the force 1 and targeting part 2.Wherein, part of the force 1 is ladder circular shaft structure, and ladder circular shaft structure comprises that holding section 6, piston pin coordinate section 7 and thread segment 8, are provided with external screw thread on thread segment 8.Its targeting part 2 comprises the first cylinder axis 9 and the second cylinder axis 11, on the second cylinder axis 11, be provided with the internal thread hole 12 matching with the external screw thread on thread segment 8, the diameter of the first cylinder axis 9 is less than the diameter of the second cylinder axis 11, the diameter of the second cylinder axis 11 is less than the diameter of piston pin hole and is less than the diameter of small end of connecting rod pin-and-hole, this makes before utilizing forcing press to press-fit semi-floating piston pin, this targeting part 2 can more easily be located to realize more exactly through the piston pin hole on piston 4 and the small end of connecting rod pin-and-hole on connecting rod 5, thereby effectively improve the quality that press-fits of piston pin 3.
As shown in Figure 2 and Figure 4, it can be matched in clearance that piston pin coordinates between section 7 and the endoporus 13 of piston pin 3, now just can more easily piston pin 3 be installed to piston pin and coordinate in section 7, also can after piston pin 3 has press-fited, relatively easily part of the force 1 be taken out from the endoporus 13 of piston pin 3 simultaneously.
Further, the diameter of thread segment 8 can be less than the diameter of the endoporus 13 of piston pin 3.Certainly, the diameter of thread segment 8 can be more than or equal to the diameter of the endoporus 13 of piston pin 3, but coordinate section 7 in order to make piston pin 3 be arranged on piston pin, and thread segment 8 will be caused to damage to endoporus 13 during through the endoporus 13 of piston pin 3, and then affect the location that press-fits of piston pin 3.And in the time that the diameter of thread segment 8 is less than the diameter of endoporus 13 of piston pin 3, just can more easily thread segment 8 be passed to the endoporus 13 of piston pin 3, and can not cause damage to the endoporus of piston pin 3 13, ensure preferably to press-fit the accuracy of location.
Particularly, in the time that the diameter of thread segment 8 is less than the diameter of endoporus 13 of piston pin 3, difference between the diameter of the endoporus 13 of the diameter of thread segment 8 and piston pin 3 at 4mm between 6mm, make thread segment 8 can be more successfully through the endoporus 13 of piston pin 3, also can ensure that thread segment 8 has enough rigidity when stressed and not fragile.
As shown in Figure 3, the one end that is provided with internal thread hole 12 on the second cylinder axis 11 can have piston pin mating surface, this makes targeting part 2 to carry out clamping piston pin 3 by this piston pin mating surface, press-fits the time thereby effectively reduced, and has improved the accuracy of location and has press-fited quality.Now piston pin coordinates the axial length of section 7 to be less than the axial length of piston pin 3, and piston pin coordinates the axial length of section 7 and the axial length sum of thread segment 8 to be greater than the axial length of piston pin 3, in such cases, in the time that piston pin 3 all coordinates with the piston pin section of cooperation 7, on thread segment 8, will still can some expose, in the time that the axial length of internal thread hole 12 is greater than the axial length of this exposed portions serve on thread segment 8, the one end that is provided with internal thread hole 12 on the second cylinder axis 11 just has piston pin mating surface, it can fit to realize the clamp operation to piston pin 3 with one end of piston pin 3.It should be noted that, internal thread hole 12 places can have one section of unthreaded hole near one end of the first cylinder axis 9, as long as when the axial length of internal thread hole 12 and the axial length sum of this unthreaded hole are greater than the axial length of exposed portions serve on above-mentioned thread segment 8, equally also can make the one end that is positioned at internal thread hole 12 on the second cylinder axis 11 there is piston pin mating surface, and can carry out clamp operation to piston pin 3.
Further; between the first cylinder axis 9 and the second cylinder axis 11, can be connected by frustum cone structure 10; this makes transition that can be round and smooth between two cylinder axis; and there will not be stress to concentrate in junction; thereby make targeting part 2 not fragile when stressed, and then protected preferably targeting part 2.
As shown in Figure 1 and Figure 5, the diameter of holding section 6 can be less than the diameter of the outer surface of piston pin 3.Certainly, the diameter of holding section 6 also can be more than or equal to the diameter of the outer surface of piston pin 3, but in the time that piston pin 3 is excessively press-fited, because the diameter of holding section 6 now will cause damage to the small end of connecting rod of piston 4 or even connecting rod 5 more greatly.And the diameter of holding section 6 is while being less than the diameter of outer surface of piston pin 3, just there will not be the problems referred to above, thereby has protected preferably piston 4 and small end of connecting rod.
Due in the time that piston pin 3 is press-fited; conventionally can be on this engine gudgeon pin assistant pressing tool coating lubricating oil so that press-fit; but this will make easy landing in the time gripping this engine gudgeon pin assistant pressing tool, thereby piston pin 3 and this engine assistant pressing tool are caused to damage.In order more easily to grip this engine gudgeon pin assistant pressing tool and to be difficult for landing, can on holding section 6, annular knurl be set.
The engine gudgeon pin assistant pressing tool that adopts the utility model embodiment to provide, the operating process that semi-floating piston pin is press-fited is: the piston pin that piston pin 3 is contained in to part of the force 1 coordinates in section 7; Screw thread in internal thread hole 12 on targeting part 2 is matched with the external screw thread of thread segment 8 on part of the force 1, rotate targeting part 2 to clamping piston pin 3, as shown in Figure 5; Coating lubricating oil on piston pin 3, targeting part 2 and part of the force 1, and targeting part 2 is inserted in the small end of connecting rod pin-and-hole on piston pin hole and the connecting rod 5 on piston 4; Adjust the stroke of forcing press, and start to press-fit, after piston pin 3 is press-fit into place, stop press-fiting; Rotate targeting part 2, part of the force 1 and targeting part 2 are separated, and take out part of the force 1 and targeting part 2, completed press-fiting piston pin 3.
The above is only preferred embodiment of the present utility model, it is to be noted, these embodiment are only not used in restriction scope of the present utility model for the utility model is described, and, after having read content of the present utility model, relevant technical staff in the field can make various changes or amendment to the utility model, and these equivalent form of values fall into the application's appended claims limited range equally.
Claims (8)
1. an engine gudgeon pin assistant pressing tool, is characterized in that, it comprises part of the force and targeting part; Described part of the force is ladder circular shaft structure, and described ladder circular shaft structure comprises that holding section, piston pin coordinate section and thread segment; On described thread segment, be provided with external screw thread; Described targeting part comprises the first cylinder axis and the second cylinder axis, is provided with the internal thread hole matching with the described external screw thread on described thread segment on described the second cylinder axis; The diameter of described the first cylinder axis is less than the diameter of described the second cylinder axis; The diameter of described the second cylinder axis is less than the diameter of piston pin hole, and is less than the diameter of small end of connecting rod pin-and-hole.
2. engine gudgeon pin assistant pressing tool according to claim 1, is characterized in that, it is matched in clearance that described piston pin coordinates between section and the endoporus of piston pin.
3. engine gudgeon pin assistant pressing tool according to claim 1, is characterized in that, the diameter of described thread segment is less than the diameter of the endoporus of piston pin.
4. engine gudgeon pin assistant pressing tool according to claim 3, is characterized in that, the difference between the diameter of described thread segment and the diameter of the endoporus of piston pin at 4mm between 6mm.
5. engine gudgeon pin assistant pressing tool according to claim 1, is characterized in that, the one end that is provided with described internal thread hole on described the second cylinder axis has piston pin mating surface.
6. engine gudgeon pin assistant pressing tool according to claim 1, is characterized in that, between described the first cylinder axis and described the second cylinder axis, is connected by frustum cone structure.
7. engine gudgeon pin assistant pressing tool according to claim 1, is characterized in that, the diameter of described holding section is less than the diameter of the outer surface of piston pin.
8. according to the engine gudgeon pin assistant pressing tool described in claim 1 to 7 any one, it is characterized in that, on described holding section, be provided with annular knurl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420217157.5U CN203792260U (en) | 2014-04-29 | 2014-04-29 | Engine gudgeon pin pressing aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420217157.5U CN203792260U (en) | 2014-04-29 | 2014-04-29 | Engine gudgeon pin pressing aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203792260U true CN203792260U (en) | 2014-08-27 |
Family
ID=51374526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420217157.5U Expired - Fee Related CN203792260U (en) | 2014-04-29 | 2014-04-29 | Engine gudgeon pin pressing aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203792260U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107253035A (en) * | 2017-06-15 | 2017-10-17 | 安徽江淮汽车集团股份有限公司 | Semi-floating piston pin press-loading apparatus |
| CN108527245A (en) * | 2018-06-19 | 2018-09-14 | 泰州市铧颐特种装备有限公司 | A kind of piston pin backing-out punch |
-
2014
- 2014-04-29 CN CN201420217157.5U patent/CN203792260U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107253035A (en) * | 2017-06-15 | 2017-10-17 | 安徽江淮汽车集团股份有限公司 | Semi-floating piston pin press-loading apparatus |
| CN107253035B (en) * | 2017-06-15 | 2019-10-25 | 安徽江淮汽车集团股份有限公司 | Semi-floating piston pin press-loading apparatus |
| CN108527245A (en) * | 2018-06-19 | 2018-09-14 | 泰州市铧颐特种装备有限公司 | A kind of piston pin backing-out punch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20190429 |