CN202900434U - Piston structure for semi-floating piston pin - Google Patents
Piston structure for semi-floating piston pin Download PDFInfo
- Publication number
- CN202900434U CN202900434U CN 201220611351 CN201220611351U CN202900434U CN 202900434 U CN202900434 U CN 202900434U CN 201220611351 CN201220611351 CN 201220611351 CN 201220611351 U CN201220611351 U CN 201220611351U CN 202900434 U CN202900434 U CN 202900434U
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- China
- Prior art keywords
- piston
- pin
- hole
- pin hole
- side face
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- 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 - Lifetime
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a piston structure for a semi-floating piston pin. The piston structure for the semi-floating piston pin comprises a cavity structure, wherein the cavity structure is provided with pin holes which are formed in a perpendicular line of a central axis of a piston. The pin holes comprise a first pin hole and a second pin hole, wherein the first pin hole is formed in a front side face window of the piston, and the second pin hole is formed in a back side face window of the piston. The first pin hole is a through hole and penetrates through the front side face window and the cavity structure. The second pin hole comprises a machining section and a blank section. The bore diameter of the machining section is equal to that of the first pin hole and is larger than that of the blank section. A front end face of the second pin hole of the machining section is connected with the cavity structure, and a back end face of the second pin hole of the blank section is transitionally connected with the back side face window of the piston. On one hand, the piston structure is beneficial for reducing machining cost, and on the other hand, the piston pin matched with the piston only can penetrate from a regulated direction and only can be placed on a pressing base seat of the piston pin according to a correct direction. Therefore, objectively, the occurrences that sample pieces and time cost caused by reversal installation of the piston are avoided. The piston structure for the semi-floating piston pin has very high social benefit and economic value.
Description
Technical field
The utility model belongs to motor car engine connecting rod field, is specifically related to a kind of piston structure for semi-floating piston pin.
Technical background
The piston pin hole that is used for semi-floating piston pin conventional in the prior art is through hole, and wrist pin all can penetrate from the front pin-and-hole of piston and rear pin-and-hole, and non-directional restriction causes assembling to make mistakes easily like this, can produce serious consequence.If find loading error at Ben Dao or next procedure, then can cause the product rejections such as piston, wrist pin, connecting rod ASSY, need to again mate and assemble.If in final assembly, all do not find loading error, this mistake generally also is difficult for finding in engine thermal testing, but, the wrist pin of loading error comes into the market through after the entrucking, the client may cause piston in using, thereby the broken whole motor of valve scraps or thereby connecting rod bearing shell axis tile, connecting rod bending produce and smash the whole motor of cylinder and scrap, can cause follow-up under MANUFACTURER claim and the product image degradation problem.
Summary of the invention
The purpose of the utility model structure provides a kind of effectively minimizing machine and adds cost, saves time cost, the piston structure that is used for semi-floating piston pin of increasing work efficiency.
For achieving the above object, the piston structure that is used for semi-floating piston pin that the utility model is designed, it comprises the cavity structure that has pin-and-hole along the vertical line of piston middle spindle line, and its special way is: described pin-and-hole comprises the first pin-and-hole of being arranged at piston front side face-port and the second pin-and-hole of piston rear side face-port; Described the first pin-and-hole is through hole and front side face-port and the cavity structure that runs through piston; Described the second pin-and-hole comprises the machine section of adding and blank section, the aperture of the described machine section of adding is identical with the aperture of the first pin-and-hole and greater than the aperture of blank section, the second pin-and-hole front-end face of the described machine section of adding is connected with cavity structure, and the second pin-and-hole ear end face of described blank section is connected with the transition of piston rear side face-port.
As preferred version, the first pin-and-hole front-end face and the second pin-and-hole front-end face that described the first pin-and-hole is positioned on the face-port of piston front side are respectively equipped with the first chamfering and the second chamfering.
The utility model has the advantage of: this piston structure on the one hand, the machine that it has shortened piston pin hole adds length and reduces by two place's machines and adds the position, is conducive to the minimizing machine and adds cost; On the other hand, so that the supporting wrist pin of piston can only penetrate from the direction of regulation, and can only be positioned over according to correct direction on the press fitting of piston pin pedestal, the exemplar of objectively having avoided causing because piston is anti-loaded cancels and time cost, has very high social benefit and economic value.
Description of drawings
Fig. 1 is perspective view of the present utility model.
Fig. 2 is plan structure cut-away illustration of the present utility model.
Fig. 3 is the plan structure cut-away illustration with the piston in conventional piston hole.
Among the figure: pin-and-hole 1, the first pin-and-hole 11, the first chamferings 110, the first pin-and-hole front-end faces 111, the second pin-and-holes 12, the second chamferings 120, the second pin-and-hole front-end faces 121, the second pin-and-hole ear end faces 122, cavity structure 2, front side face-port 3, rear side face-port 4.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As shown in Figure 1, be the piston structure for semi-floating piston pin of the present utility model, it comprises the cavity structure 2 that has pin-and-hole 1 along the vertical line of piston middle spindle line, and pin-and-hole 1 comprises the first pin-and-hole 11 of being arranged at piston front side face-port 3 and the second pin-and-hole 12 of piston rear side face-port 4; The first pin-and-hole 11 is through hole and the front side face-port 3 and cavity structure 2 that runs through piston; The second pin-and-hole 12 comprises the machine section of adding and blank section, the aperture of the machine section of adding is identical with the aperture of the first pin-and-hole 11 and greater than the aperture of blank section, the second pin-and-hole front-end face 121 of the machine section of adding is connected with cavity structure 2, and the second pin-and-hole ear end face 122 of blank section is connected with 4 transition of piston rear side face-port; The first pin-and-hole front-end face 111 and the second pin-and-hole front-end face 121 that the first pin-and-hole 11 is positioned on the piston front side face-port 3 are respectively equipped with the first chamfering 110 and the second chamfering 120.
As shown in Figure 2, add the piston of passing hole type piston pin hole for being provided with conventional machine, the direction of packing into that can't the limited piston pin may cause piston anti-loaded, and final so that exemplar cancels, cost increases.
Working principle of the present utility model is as follows: piston pin hole is changed to " adding the shoulder hole that the hole consists of by blank hole and machine " by " machine adds through hole ", penetrates so that wrist pin can only slave adds nose end.The utility model is by change piston pin hole structure, thus the generation of the anti-loaded situation of piston after objectively avoiding the press fitting of piston pin that causes owing to artificial subjective factor.It changes piston pin hole into shoulder hole by through hole, thereby so that wrist pin when prepackage can only penetrate from the pin-and-hole of regulation, and piston and wrist pin after the prepackage can only direction according to the rules be positioned on the press fitting of piston pin pedestal.
Claims (2)
1. piston structure that is used for semi-floating piston pin, it comprises the cavity structure (2) that has pin-and-hole (1) along the vertical line of piston middle spindle line, it is characterized in that: described pin-and-hole (1) comprises the first pin-and-hole (11) of being arranged at piston front side face-port (3) and second pin-and-hole (12) of piston rear side face-port (4); Described the first pin-and-hole (11) is through hole and the front side face-port (3) and cavity structure (2) that runs through piston; Described the second pin-and-hole (12) comprises the machine section of adding and blank section, the aperture of the described machine section of adding is identical with the aperture of the first pin-and-hole (11) and greater than the aperture of blank section, the second pin-and-hole front-end face (121) of the described machine section of adding is connected with cavity structure (2), and the second pin-and-hole ear end face (122) of described blank section is connected with piston rear side face-port (4) transition.
2. the piston structure for semi-floating piston pin according to claim 1, it is characterized in that: the first pin-and-hole front-end face (111) and the second pin-and-hole front-end face (121) that described the first pin-and-hole (11) is positioned on the piston front side face-port (3) are respectively equipped with the first chamfering (110) and the second chamfering (120).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220611351 CN202900434U (en) | 2012-11-19 | 2012-11-19 | Piston structure for semi-floating piston pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220611351 CN202900434U (en) | 2012-11-19 | 2012-11-19 | Piston structure for semi-floating piston pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202900434U true CN202900434U (en) | 2013-04-24 |
Family
ID=48121113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220611351 Expired - Lifetime CN202900434U (en) | 2012-11-19 | 2012-11-19 | Piston structure for semi-floating piston pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202900434U (en) |
-
2012
- 2012-11-19 CN CN 201220611351 patent/CN202900434U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |