CN201794699U - Drum-shaped roller pin of oil injection pump - Google Patents
Drum-shaped roller pin of oil injection pump Download PDFInfo
- Publication number
- CN201794699U CN201794699U CN2010205246880U CN201020524688U CN201794699U CN 201794699 U CN201794699 U CN 201794699U CN 2010205246880 U CN2010205246880 U CN 2010205246880U CN 201020524688 U CN201020524688 U CN 201020524688U CN 201794699 U CN201794699 U CN 201794699U
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- CN
- China
- Prior art keywords
- roller pin
- roller
- drum
- pin
- contact
- 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 relates to a drum-shaped roller pin, which is applied to a tappet body component and can lower contact stress and reduces wear, and the outer circle surface of the drum-shaped roller pin is processed to be drum-shaped. According to the technical scheme provided by the utility model, the drum-shaped roller pin of an oil injection pump is characterized in that: the roller pin has a drum-shaped structure of which the middle is thick and the two ends are thin; the diameter of the vertical central line of the roller pin is largest; and the outer circle surface of the roller pin is in arc transition from the middle to the two ends. Compared with the prior art, the roller pin has the advantages that: the roller pin adopting the drum-shaped structure is matched with a roller, so that the contact form of the roller pin and the roller becomes point contact from the original line contact and contact stress is reduced; stresses at the two ends are homogenized and the edge stresses of the roller pin and the roller are reduced remarkably; and the gap between the two ends of the roller pin is enlarged, so that lubricating oil enters the space between the roller pin and the roller more sufficiently for lubricating and the wear phenomenon between the roller pin and the roller is improved effectively.
Description
Technical field
The utility model relates to a kind of roller pin, specifically is that a kind of being applied to can be reduced contact stress in the tappet body component, and the outer round surface that reduces wear is processed into the roller pin of cydariform.
Background technique
The surface that is applied to the roller pin in the tappet body component at present generally is a cylindrical structural, and roller internal surface with matching also is a cylindrical structural.Be Economy and the emission performance that improves motor car engine, need to improve the pump end pressure usually and make fuel injection ultrahigh pressureization.Along with the pump end pressure continues to increase, contact stress between roller pin and the roller is also in continuous increase, and during the running of roller pin and roller, contact form between them is the line contact, under the effect repeatedly of higher contact stress, the contact surface temperature of roller pin and roller can raise gradually, and wearing and tearing are accelerated, and finally causes roller pin and Rotor block to damage.
Summary of the invention
The purpose of this utility model is to overcome the defective of the big and lack of lubrication of contact stress between roller and the roller pin, a kind of structure Injection Pump barrel-type roller pin cleverly is provided, this roller pin can make roller pin be contacted by line with the contact form of roller to become a contact, reduce the contact stress between roller pin and the roller greatly, and guaranteed that full and uniform the entering between roller pin and the roller of lubricant oil is lubricated, reduce the wearing and tearing between them, guaranteed the Security and the Economy of Injection Pump.
The technological scheme that provides according to the utility model: a kind of Injection Pump barrel-type roller pin, it is characterized in that: described roller pin is the thin drum organization in middle thick two, the diameter maximum at roller pin vertical center line place, the periphery of roller pin by the centre to the curved transition in two ends.
As further improvement of the utility model, the head at described roller pin two ends is made as snaphead.
The utility model compared with prior art, advantage is: adopt the roller pin and the roller of drum organization to cooperatively interact, roller pin and contact form between the roller are contacted by original line become a contact, reduced contact stress; The stress equalizing that two ends are subjected to significantly reduces the edge stress of roller pin and roller; It is big that the gap at roller pin two ends becomes, and makes lubricant oil enter more fully between roller pin and the roller and be lubricated, thereby effectively improved wear phenomenon between them.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an installation applicable cases schematic representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with concrete accompanying drawing.
As shown in the figure: described roller pin 1 be in the middle of the thin drum organization in thick two, the diameter maximum at roller pin 1 vertical center line place, the periphery of roller pin 1 by the centre to the curved transition in two ends.The head at roller pin 1 two ends is made as and the similar spheric structure in tappet body cylndrical surface.
When the utility model specifically assembled and uses, as shown in Figure 2, roller 2 was placed in roller 2 mounting grooves that tappet body 3 is provided with, and roller pin 1 passes roller 2, and the two ends of roller pin 1 place in roller pin 1 mounting hole.With hand rotation roller 2, should guarantee that roller 2 can freely rotate no any catching phenomenon, and will make roller 2 have the gap of moving axially.
When two cylinders contacted, its contact stress was:
(1);
When two spheroids contacted, its contact stress was:
(2).
Can get by publicity (1), (2): when two cylinders contact, form the line contact, its maximum contact stress be proportional to add two/first power of load, when two spheroids contact, form the some contact, its maximum contact stress be proportional to add three/first power of load.Can prove thus because roller pin 1 adopts drum organization, make roller pin 1 and contact form between the roller 2 contact and become a contact from original line, contact compared to line, contact stress between roller pin 1 and the roller 2 reduces greatly, effectively reduce the wearing and tearing between roller pin 1 and the roller 2, prolonged the working life of roller pin 1 and roller 2.
Owing to adopt Spielpassung between roller pin 1 and the roller 2, when the roller pin 1 of employing drum organization cooperatively interacts with roller 2, it is big that the gap at roller pin 1 two ends becomes, making lubricant oil enter more fully between roller pin 1 and the roller 2 is lubricated, the stress equalizing that two ends are subjected to, significantly reduce the edge stress of roller pin 1 and roller 2, further reduce the wearing and tearing between roller pin 1 and the roller 2.Roller pin 1 adopts the Bearing Steel material, has high hardness, wear-resisting property and contact fatigue property, and bearing load is big, has better prolonged the working life of roller pin 1 and roller 2; The both ends of the surface of roller pin 1 are designed to and the similar spheric structure in the cylndrical surface of tappet body 3, the wearing and tearing when it can reduce work between tappet body 3 and the roller pin 1; Simultaneously, because roller pin 1 is a Spielpassung with tappet body 3, during work, relative tappet body 3 transverse movements of roller pin 1 meeting will be run into inboard wall of cylinder block like this, and surface of contact is that the cylndrical surface contacts with sphere like this, form the some surface of contact, reduced the wearing and tearing of roller pin 1 like this.
Claims (2)
1. Injection Pump barrel-type roller pin is characterized in that: described roller pin (1) be in the middle of the thin drum organization in thick two, the diameter maximum at roller pin (1) vertical center line place, the periphery of roller pin (1) by the centre to the curved transition in two ends.
2. Injection Pump barrel-type roller pin as claimed in claim 1 is characterized in that: the head at described roller pin (1) two ends is made as snaphead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205246880U CN201794699U (en) | 2010-09-10 | 2010-09-10 | Drum-shaped roller pin of oil injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205246880U CN201794699U (en) | 2010-09-10 | 2010-09-10 | Drum-shaped roller pin of oil injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201794699U true CN201794699U (en) | 2011-04-13 |
Family
ID=43849611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205246880U Expired - Fee Related CN201794699U (en) | 2010-09-10 | 2010-09-10 | Drum-shaped roller pin of oil injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201794699U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443441A (en) * | 2020-11-20 | 2021-03-05 | 无锡锡州机械有限公司 | Tappet body of fuel injection pump |
-
2010
- 2010-09-10 CN CN2010205246880U patent/CN201794699U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443441A (en) * | 2020-11-20 | 2021-03-05 | 无锡锡州机械有限公司 | Tappet body of fuel injection pump |
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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: 20110413 Termination date: 20190910 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |