CN203604624U - Abrasion-resisting piston pin - Google Patents
Abrasion-resisting piston pin Download PDFInfo
- Publication number
- CN203604624U CN203604624U CN201320635303.1U CN201320635303U CN203604624U CN 203604624 U CN203604624 U CN 203604624U CN 201320635303 U CN201320635303 U CN 201320635303U CN 203604624 U CN203604624 U CN 203604624U
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- Prior art keywords
- hole
- piston pin
- cone shape
- wall
- wear
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses an abrasion-resisting piston pin. The abrasion-resisting piston pin comprises a cylindrical piston pin body. The center of the cylindrical piston pin body is provided with a cylindrical hole. The two ends of the cylindrical hole are provided with a first taper hole and a second taper hole respectively, the first taper hole and the second taper hole are symmetrical, and the inner wall of the first taper hole, the inner wall of the cylindrical hole and the inner wall of the second taper hole are provided with abrasion-resisting coatings being the same in thickness. By means of the piston pin provided with the first taper hole, the cylindrical hole and the second taper hole, the cylindrical hole mainly bears the stress produced when a connecting rod works, and the two taper holes can offset the unevenness of the stress on the connecting rod; due to the fact that the inner wall of the first taper hole, the inner wall of the cylindrical hole and the inner wall of the second taper hole are provided with the abrasion-resisting coatings, the abrasion-resisting performance of the inner wall of the piston pin is improved, and the service life of the piston pin is prolonged.
Description
Technical field
The utility model relates to technical field of engines, in particular, and particularly a kind of Wear-resitsting pistons pin being applied in motor.
Background technique
Wrist pin is the important spare part in motor car engine, is the cylindrical peg that is contained in piston skirt, and its middle part, through connecting rod small end hole, is used for connecting piston and connecting rod, and the gas load that piston is born is passed to connecting rod.For weight reduction, wrist pin is generally used high duty alloy steel making, and is made into hollow.Consult shown in Fig. 1, Fig. 2, the main structure of existing wrist pin comprises following two kinds: the one, and columniform endoporus, two is two symmetrical cone-shaped inner holes.But the shortcoming that these two kinds of wrist pins mainly exist is: owing to being subject to processing the impact of precision, connecting rod is arranged on after cylindricality endoporus or cone-shaped inner hole, discontinuity in the time of work, the internal surface of wrist pin easy to wear, and then cause sharply decline the working life of wrist pin.Therefore, need to improve the structure of existing wrist pin.
Model utility content
The purpose of this utility model be to provide a kind of endoporus stressed evenly, increase the service life be applied in the Wear-resitsting pistons pin in motor.
In order to solve problem set forth above, the technical solution adopted in the utility model is: a kind of Wear-resitsting pistons pin, comprise cylinder-piston pin body, the middle part of this cylinder-piston pin body is provided with cylindrical hole, be respectively equipped with symmetrical the first cone shape hole and the second cone shape hole at the two ends of cylindrical hole, and on the inwall of described the first cone shape hole, cylindrical hole and the second cone shape hole, be equipped with the wear resistant coating of consistency of thickness.
According to a preferred embodiment of the present utility model: the material of described wear resistant coating is ceramic wear-resistant coating.
According to a preferred embodiment of the present utility model: the thickness of described wear resistant coating is 5-10mm.
According to a preferred embodiment of the present utility model: the cone angle of described the first cone shape hole and the second cone shape hole equates, is 2-10 °.
According to a preferred embodiment of the present utility model: the two ends of described cylinder-piston pin body are provided with fillet, and are also provided with wedge limit between this fillet and the outer wall of cylinder-piston pin body, and the angle between this wedge limit and the outer wall of cylinder-piston pin body is not more than 10 °.
Compared with prior art, the beneficial effects of the utility model are: the wrist pin by setting with the first cone shape hole, cylindrical hole and the second cone shape hole, make cylindrical hole mainly bear the stressed of connecting rod when work, and two cone shape holes can balance out the stressed nonuniformity of connecting rod; Meanwhile, be equipped with wear resistant coating at the first cone shape hole, cylindrical hole and the second cone shape hole inwall, increased the wear resistance of wrist pin inwall, extended the working life of wrist pin.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of wrist pin of the prior art.
Fig. 2 is the structural representation of another kind of wrist pin of the prior art.
Fig. 3 is the structural representation of Wear-resitsting pistons pin of the present utility model.
Fig. 4 is the enlarged view at A place in Fig. 3.
Description of reference numerals: 1, cylinder-piston pin body, 2, the first cone shape hole, 3, cylindrical hole, 4, the second cone shape hole, 5, wear resistant coating, 6, fillet, 7, wedge limit.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but mode of execution of the present utility model is not limited to this.
Consult shown in Fig. 3, Fig. 4, the utility model provides a kind of Wear-resitsting pistons pin, comprise cylinder-piston pin body 1, the middle part of this cylinder-piston pin body 1 is provided with cylindrical hole 3, be respectively equipped with symmetrical the first cone shape hole 2 and the second cone shape hole 4 at the two ends of cylindrical hole 3, and on the inwall of described the first cone shape hole 2, cylindrical hole 3 and the second cone shape hole 4, be equipped with the wear resistant coating 5 of consistency of thickness.
As can be seen from the figure, the side that the diameter of the first cone shape hole 2 and the second cone shape hole 4 is larger is all positioned at the outside of wrist pin, is conducive to like this installation of connecting rod.And, after connecting rod is arranged in wrist pin, stressed when cylindrical hole 3 mainly bears connecting rod work, and two cone shape holes can balance out the stressed nonuniformity of connecting rod.And, because the utility model is also equipped with wear resistant coating 5 at the inwall of the first cone shape hole 2, cylindrical hole 3 and the second cone shape hole 4, increase the wear resistance of wrist pin inwall, extend the working life of wrist pin.
The material of the wear resistant coating 5 that the utility model adopts is ceramic wear-resistant coating, and ceramic wearing coat can adopt existing technique to install, as: baking processing after soaking.
The thickness of the wear resistant coating 5 that the utility model adopts is 5-10mm, preferably adopts 8mm, can make like this connecting rod after installation, have best using effect.
The first cone shape hole 2 that the utility model adopts and the cone angle a of the second cone shape hole 4 are equal, are 2-10 °, and it can balance out the stressed nonuniformity of connecting rod to greatest extent.
The two ends of the cylinder-piston pin body 1 that the utility model adopts are provided with fillet 6, and be also provided with wedge limit 7 between the outer wall of this fillet 6 and cylinder-piston pin body 1, angle b between the outer wall of this wedge limit 7 and cylinder-piston pin body 1 is not more than 10 °, wherein, wedge limit 7 be provided with the installation that is beneficial to cylinder-piston pin body 1.
And, the material selection 17Cr3 of wrist pin of the present utility model, outer surface effective case depth 500HV1:0.4-0.9mm, and remove the effective case depth 500HV1:0.6-1.1mm of the internal surface after wear resistant coating 5; In heat treatment process, quench and tempering process, all to reach 175 ℃, be incubated 20 minutes.
Above-described embodiment is preferably mode of execution of the utility model; but mode of execution of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection domain of the present utility model.
Claims (5)
1. a Wear-resitsting pistons pin, comprise cylinder-piston pin body (1), it is characterized in that: the middle part of this cylinder-piston pin body (1) is provided with cylindrical hole (3), be respectively equipped with symmetrical the first cone shape hole (2) and the second cone shape hole (4) at the two ends of cylindrical hole (3), and on the inwall of described the first cone shape hole (2), cylindrical hole (3) and the second cone shape hole (4), be equipped with the wear resistant coating (5) of consistency of thickness.
2. Wear-resitsting pistons pin according to claim 1, is characterized in that: the material of described wear resistant coating (5) is ceramic wear-resistant coating.
3. Wear-resitsting pistons pin according to claim 2, is characterized in that: the thickness of described wear resistant coating (5) is 5-10mm.
4. Wear-resitsting pistons pin according to claim 2, is characterized in that: the cone angle of described the first cone shape hole (2) and the second cone shape hole (4) equates, is 2-10 °.
5. Wear-resitsting pistons pin according to claim 2, it is characterized in that: the two ends of described cylinder-piston pin body (1) are provided with fillet (6), and between the outer wall of this fillet (6) and cylinder-piston pin body (1), be also provided with wedge limit (7), the angle between this wedge limit (7) and the outer wall of cylinder-piston pin body (1) is not more than 10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320635303.1U CN203604624U (en) | 2013-10-16 | 2013-10-16 | Abrasion-resisting piston pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320635303.1U CN203604624U (en) | 2013-10-16 | 2013-10-16 | Abrasion-resisting piston pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203604624U true CN203604624U (en) | 2014-05-21 |
Family
ID=50717298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320635303.1U Expired - Fee Related CN203604624U (en) | 2013-10-16 | 2013-10-16 | Abrasion-resisting piston pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203604624U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763754A (en) * | 2016-11-24 | 2017-05-31 | 余姚市舒春机械有限公司 | A kind of unmanned plane high accuracy piston pin and preparation method thereof |
| CN108547706A (en) * | 2018-03-28 | 2018-09-18 | 安徽宝泰汽车部件有限公司 | A kind of engine gudgeon pin |
-
2013
- 2013-10-16 CN CN201320635303.1U patent/CN203604624U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763754A (en) * | 2016-11-24 | 2017-05-31 | 余姚市舒春机械有限公司 | A kind of unmanned plane high accuracy piston pin and preparation method thereof |
| CN108547706A (en) * | 2018-03-28 | 2018-09-18 | 安徽宝泰汽车部件有限公司 | A kind of engine gudgeon pin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20151016 |
|
| EXPY | Termination of patent right or utility model |