CN204283651U - Oil-return type piston - Google Patents

Oil-return type piston Download PDF

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Publication number
CN204283651U
CN204283651U CN201420734499.4U CN201420734499U CN204283651U CN 204283651 U CN204283651 U CN 204283651U CN 201420734499 U CN201420734499 U CN 201420734499U CN 204283651 U CN204283651 U CN 204283651U
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CN
China
Prior art keywords
oil
piston
pin
hole
return type
Prior art date
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Active
Application number
CN201420734499.4U
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Chinese (zh)
Inventor
张兴海
段伟
凌青海
郑炳方
卢俊锡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Xiaokang Power Co., Ltd.
Original Assignee
Chongqing Sokon Industry Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to CN201420734499.4U priority Critical patent/CN204283651U/en
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Publication of CN204283651U publication Critical patent/CN204283651U/en
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Abstract

The utility model discloses a kind of oil-return type piston, comprise piston only, described piston only is provided with the back oil road being communicated with bottom annular groove and pin-and-hole, oil-return type piston of the present utility model, piston only is provided with the back oil road being communicated with bottom annular groove and pin-and-hole, by piston ring, machine oil unnecessary on cylinder wall is scraped off also between guide pin hole and bearing pin, and then bearing pin and pin-and-hole are lubricated, improve greasy property.

Description

Oil-return type piston
Technical field
The utility model relates to engine piston, particularly relates to a kind of oil-return type piston.
Background technique
Piston is internal-combustion engine " heart ", coordinate with piston cylinder and cylinder cap and form firing chamber, by inflammable gas in firing chamber combustion, produce high-temperature high-pressure fuel gas expansion work, and then promote piston movement drive crankshaft rotating Driving Torque, along with the power character of vehicle combustion motor, Economy, the requirement of the feature of environmental protection and reliability is more and more stricter, piston has developed into collection light-high-strength new material, special-shaped cylindrical compound profile, the multinomial new technology such as special pinhole is in the product of the high technology content of one, to ensure the heat resistance of piston, wear resistance, stable guidance quality and good sealing function, reduce the frictional work loss of motor, reduce oil consumption, noise and discharge.In prior art, piston is generally made up of head, skirt section and piston pin boss, head side wall is provided with annular groove, for ring installation, piston pin boss is provided with pin-and-hole, for installing bearing pin, when piston up-down, generally, machine oil unnecessary on cylinder wall scrapes off and flows back to oil sump by combined oil ring, but owing to coordinating closely between bearing pin with pin-and-hole, and be positioned at key seat inside, generally by lubricating oil splash effect, pin-and-hole and bearing pin lubricated, but the regular extreme difference of sputtering when fluid concussion springs up, is difficult to the lubrication ensured pin-and-hole and bearing pin.
Therefore, need a kind of oil-return type piston, utilize machine oil unnecessary on cylinder wall to lubricate bearing pin and pin-and-hole, improve greasy property.
Model utility content
In view of this, the purpose of this utility model is to provide a kind of oil-return type piston, and machine oil unnecessary on cylinder wall can be utilized to lubricate bearing pin and pin-and-hole, improves greasy property.
Oil-return type piston of the present utility model, comprises piston only, and described piston only is provided with the back oil road being communicated with bottom annular groove and pin-and-hole;
Further, described back oil road is the groove arranged along piston only sidewall;
Further, the degree of depth of described groove is greater than the degree of depth of bottom annular groove;
Further, the corresponding back oil road lower end of described pin-and-hole hole wall is provided with point oil groove for fluid dispersion that radial direction extends out.
The beneficial effects of the utility model are: oil-return type piston of the present utility model, piston only is provided with the back oil road being communicated with bottom annular groove and pin-and-hole, by piston ring, machine oil unnecessary on cylinder wall is scraped off also between guide pin hole and bearing pin, and then bearing pin and pin-and-hole are lubricated, improve greasy property.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the left view of Fig. 1.
Embodiment
Fig. 1 is structural representation of the present utility model, Fig. 2 is the left view of Fig. 1, as shown in the figure: the oil-return type piston of the present embodiment, comprise piston only 1, described piston only 1 is provided with the back oil road 4 being communicated with bottom annular groove 2 and pin-and-hole 3, piston only 1 is provided with three annular grooves, bottom annular groove 2 refers to the annular groove being positioned at bottommost, piston only 1 moves up and down and machine oil unnecessary on cylinder wall can be scraped to bottom annular groove 2, therefore can this part fluid be imported in pin-and-hole 3 by back oil road 4, and then bearing pin and pin-and-hole 3 are lubricated, improve greasy property.
In the present embodiment, described back oil road 4 is the groove arranged along piston only 1 sidewall, just with processing, can reduce piston only 1 cost of production.
In the present embodiment, the degree of depth of described groove is greater than the degree of depth of bottom annular groove 2, can not only produce enough spaces to hold machine oil, and be beneficial to machine oil to bearing pin axial diffusion.
In the present embodiment, corresponding back oil road 4 lower end of described pin-and-hole 3 hole wall is provided with point oil groove 5 for fluid dispersion that radial direction extends out, radial direction extends out and refers to the pin-and-hole 3 hole heart as center of circle radial outward expansion, namely oil groove 5 is divided to be recessed to form by pin-and-hole 3 hole wall, oil groove 5 is divided to be the bar-shaped trough arranged around pin-and-hole 3 circumference, divide the right central angle of oil groove 5 to be not less than 30 °, be beneficial to machine oil along the diffusion of pin-and-hole 3 circumference, improve lubrication effect.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.

Claims (4)

1. an oil-return type piston, is characterized in that: comprise piston only, and described piston only is provided with the back oil road being communicated with bottom annular groove and pin-and-hole.
2. oil-return type piston according to claim 1, is characterized in that: described back oil road is the groove arranged along piston only sidewall.
3. oil-return type piston according to claim 2, is characterized in that: the degree of depth of described groove is greater than the degree of depth of bottom annular groove.
4. oil-return type piston according to claim 3, is characterized in that: the corresponding back oil road lower end of described pin-and-hole hole wall is provided with point oil groove for fluid dispersion that radial direction extends out.
CN201420734499.4U 2014-11-28 2014-11-28 Oil-return type piston Active CN204283651U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420734499.4U CN204283651U (en) 2014-11-28 2014-11-28 Oil-return type piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420734499.4U CN204283651U (en) 2014-11-28 2014-11-28 Oil-return type piston

Publications (1)

Publication Number Publication Date
CN204283651U true CN204283651U (en) 2015-04-22

Family

ID=52866818

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420734499.4U Active CN204283651U (en) 2014-11-28 2014-11-28 Oil-return type piston

Country Status (1)

Country Link
CN (1) CN204283651U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104533654A (en) * 2014-11-28 2015-04-22 重庆小康工业集团股份有限公司 Engine piston

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104533654A (en) * 2014-11-28 2015-04-22 重庆小康工业集团股份有限公司 Engine piston

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Legal Events

Date Code Title Description
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20170221

Address after: 401221 Chongqing Changshou District Industrial Park electromechanical materials Park

Patentee after: Chongqing Xiaokang Power Co., Ltd.

Address before: 400033 Jinqiao Road, Shapingba District, Chongqing, 61-1

Patentee before: Chongqing Xiaokang Industry Group Co., Ltd.

C41 Transfer of patent application or patent right or utility model