CN206158817U - Prevent that diesel engine camshaft from gnawing wounded structure - Google Patents
Prevent that diesel engine camshaft from gnawing wounded structure Download PDFInfo
- Publication number
- CN206158817U CN206158817U CN201621093729.9U CN201621093729U CN206158817U CN 206158817 U CN206158817 U CN 206158817U CN 201621093729 U CN201621093729 U CN 201621093729U CN 206158817 U CN206158817 U CN 206158817U
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- CN
- China
- Prior art keywords
- tappet
- roller
- housing
- diesel engine
- casing
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a prevent that diesel engine camshaft from gnawing wounded structure, include: cam mechanism and tappet subassembly, cam mechanism includes: the camshaft, be equipped with the cam on the camshaft, the tappet subassembly includes: the tappet casing, tappet casing upper portion has the shoulder hole, the shoulder hole is equipped with the bulb seat, space between the bulb seat outside and the tappet casing forms the fluid space that can be used to hold pressure machine oil, tappet casing bottom is equipped with the gyro wheel through the round pin axle, the bush has between round pin axle and the gyro wheel, the round pin axle passes through screw locking on the tappet casing, casing oil cavity no. 1, casing oil cavity no. 2 and casing oil cavity no. 3 have on the tappet casing, casing oil cavity no. 3 meets with the epaxial flat flat groove of round pin, the left oil cavity and the right oil cavity that run through to the gyro wheel still have on the tappet casing, a left side oil cavity and right oil cavity are crossing with the gyro wheel, prevent the cam, the gyro wheel is gnawed and is hindered the phenomenon, thoroughly solves this technological problem.
Description
Technical field
The utility model is related to mechanical manufacturing field, more particularly to a kind of structure for preventing cam shaft for diesel engine from chewing.
Background technology
The cam of camshaft of prior art is shown in Fig. 1 with the assembling structure of tappet component.Lubrication between cam and roller and cold
But desirable pressure machine oil is provided after coming by the main lubricating oil pump of diesel engine and is stored in tappet component, then flows to each profit by tappet component
Sliding position.The assembling structure of tappet component is shown in Fig. 2.Tappet component is by groups such as ball cup, tappet housing, roller, bushing, bearing pins
Into the position of the needs lubrication of prior art has：1. cam periphery and roller periphery；2. roller inner headed face and bushing
Periphery；3. bushing inner headed face and bearing pin periphery；4. roller both ends of the surface and the inner face of tappet housing two.
The above position is required to substantial amounts of pressure machine oil and is lubricated when diesel engine works, but prior art side
There is the phenomenon for having insufficient lubrication with lower portion in case：
1) roller inner headed face flows into bearing pin with the lubricating oil in excircle of bushing face by Fig. 1 view upper shells lubrication hole 3 203
In the flat groove 501 on top (machine oil in tappet housing is provided by diesel engine oil pump, and pressure is 0.45MPa), then by flat
Rise as high as the banks into the inner spiral groove 401 of bushing, then bushing external spiral groove 403 entered by the aperture 403 on the circumference of inner spiral groove 401,
Pressure machine oil is entered after the inside and outside helicla flute of bushing, and a large amount of machine oil are flowed to the both ends of the surface of bushing 4 by helicla flute, and in roller
Only have a small amount of oil lubricating between disc and excircle of bushing face, cause lack of lubrication between roller inner headed face and excircle of bushing face.Roller
There is mutually motion and for high speed revolving part with bushing, amount of heat can be produced, a small amount of machine oil is that these heats cannot be carried out
Cooling, the heat that machine oil band is not walked will be stored between roller, bushing, and these heats meeting pair rollers, bushing are heated, and are made
Intensity, rigidity are reduced into after roller, bushing temperature distortion, in operation, the concave point and spike of local occur, then roller, lining
There is large area and pulls in each surface of set.
2) roller both ends of the surface are only flowed into the lubricating oil of the inner face of tappet housing two by the helicla flute of bushing, oil flow rate
Only 0.3m3/ h, and these lubricating oil be only capable of lubricate the lower end surface of the two, the upper end of the two due to machine oil gravity make
The inorganic oil lubrication with not increasing, this will result in the two temperature distortion, and further resulting in the intensity of roller, rigidity reduces.
3) after the intensity of roller, rigidity are reduced, its end face, periphery can be pulled, with the deterioration pulled, roller surface
Tiny metallic particles can be produced, metallic particles can split away off, and be stored between roller periphery and cam periphery, so as to gold
Metal particles wear cam periphery, causes cam periphery to be chewed, and makes cam cisco unity malfunction.
4) structure of prior art has just started break-in operating mode (rotating speed in diesel engine：600r/min, zero load, time：
30min) just occur that cam, roller chew phenomenon, the structure of prior art can be found out from Fig. 1-7.
The content of the invention
The purpose of this utility model is：Overcome the above-mentioned problems in the prior art, propose that one kind prevents diesel engine
The structure that camshaft is chewed, by increasing fuel feed hole and changing bush structure, so as to increasing fuel delivery and improving fluid flow direction, from
And prevent cam, roller and chew phenomenon, thoroughly solve the technical barrier.
The purpose of this utility model is realized by following technical proposals：
A kind of structure for preventing cam shaft for diesel engine from chewing, including：Cam mechanism and tappet component, the cam mechanism bag
Include：Camshaft, is equipped with cam on the camshaft, the tappet component includes：Tappet housing, the tappet housing upper tool
There is shoulder hole, the shoulder hole is equipped with ball cup, and the space between the ball cup outside and tappet housing forms and can be used to hold
Receive the fluid space of pressure machine oil, the tappet housing bottom is equipped with roller, has between the bearing pin and roller by bearing pin
There is bushing, the bearing pin on tappet housing, has housing lubrication hole one, housing by screw lock on the tappet housing
Lubrication hole two and housing lubrication hole three, the housing lubrication hole three connects with the flat groove on bearing pin, on the tappet housing also
With the left lubrication hole and right lubrication hole that are through to roller, the left lubrication hole and right lubrication hole intersect with roller.
A kind of structure for preventing cam shaft for diesel engine from chewing of the present utility model, the sleeve inner surface has bush ring
Groove, the bush side wall has the side opening for running through, and the bushing annular groove and side opening are intersecting.
A kind of structure for preventing cam shaft for diesel engine from chewing of the present utility model, the ball cup center has bulb center
Hole, the ball cup is circumferentially symmetrically arranged with bulb side opening, and the bulb side opening intersects with left lubrication hole and right lubrication hole.
A kind of structure for preventing cam shaft for diesel engine from chewing of the present utility model, the roller both ends of the surface have roller annular
Groove.
A kind of structure for preventing cam shaft for diesel engine from chewing of the present utility model, the flat groove connects with side opening.
A kind of structure for preventing cam shaft for diesel engine from chewing of the present utility model, the side opening is located at axially middle section of roller
On face.
According to above-mentioned technical proposal, the beneficial effects of the utility model are：
1) lubricating oil in roller inner headed face and excircle of bushing face is flowed into the flat groove on bearing pin top by housing lubrication hole three
It is interior, then the inner groove of bushing, then the side entered on the middle part circumference of bushing by the inner groove of bushing are entered by the flat groove of bearing pin
Hole is into setting up lubricating oil film between roller inner headed face and excircle of bushing face, then flows to both ends of the surface under pressure.Such roller
The frictional heat produced between bushing is just taken away by machine oil.
2) roller both ends of the surface are flowed into the lubricating oil of the inner face of tappet housing two by left lubrication hole and right lubrication hole, are increased
Fuel feed hole, oil flow rate is by 0.3 m3/ h increases to 0.9m3/ h, and these lubricating oil are such rollers two from overhead stream to bottom
End face can be by oil lubricating with the upper and lower end face of the inner face of tappet housing two, and the heat that the end-face friction between the two is produced is all
Can be pulled away.
3) need at the five of the technical program pair lubrication position can provide in a large number, the machine oil that have pressure be lubricated,
Cooling.The thermic load of each part in its own thermal deformation, taken away in time by the heat for producing each other.Ensure cam, rolling
Wheel etc. can normal work.
4) the technical program is in 115 hours (rotating speeds of diesel engine long run test：1000r/min, power：1950kW) all do not have
Generation cam, roller chew phenomenon, thoroughly solve the technical barrier.
Description of the drawings
Fig. 1 is existing structure schematic front view；
Fig. 2 is existing structure left view schematic diagram；
Fig. 3 is existing structure tappet housing top view；
Fig. 4 is existing structure ball cup schematic diagram；
Fig. 5 is existing structure ball cup top view；
Fig. 6 is roller schematic diagram；
Fig. 7 is existing structure bushing schematic diagram；
Fig. 8 is the utility model ball cup schematic diagram；
Fig. 9 is the utility model ball cup top view；
Figure 10 is the structural representation that the utility model prevents cam shaft for diesel engine from chewing；
Figure 11 is the left view that the utility model prevents cam shaft for diesel engine from chewing；
Figure 12 is tappet housing top view of the present utility model；
Figure 13 is bushing schematic diagram of the present utility model；
Figure 14 is bushing sectional view of the present utility model.
Specific embodiment
The utility model is further described with reference to specific embodiments and the drawings.
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
It is a kind of if Fig. 6 and Fig. 8-14 is a kind of embodiment of the structure for preventing cam shaft for diesel engine from chewing of the utility model
The structure that cam shaft for diesel engine is chewed is prevented, including：Cam mechanism and tappet component, the cam mechanism includes：Camshaft 7,
Cam 8 is equipped with the camshaft 7, the tappet component includes：Tappet housing 2, the top of tappet housing 2 has ladder
Hole, the shoulder hole is equipped with ball cup 1, and the space between the outside of the ball cup 1 and tappet housing 2 forms and can be used to accommodate pressure
The fluid space of power machine oil 9, the bottom of tappet housing 2 is equipped with roller 3 by bearing pin 5, between the bearing pin 5 and roller 3
With bushing 4, the bearing pin 5 is locked on tappet housing 2 by screw 6, has housing lubrication hole on the tappet housing 2
One 201, the flat groove on housing lubrication hole 2 202 and housing lubrication hole 3 203, the housing lubrication hole 3 203 and bearing pin 5
501 connect, and also have the left lubrication hole 204 and right lubrication hole 205 for being through to roller 3, the left lubrication on the tappet housing 2
Hole 204 and right lubrication hole 205 intersect with roller 3, and the inner surface of the bushing 4 has bushing annular groove 405, the side wall tool of the bushing 4
There is the side opening 406 for running through, the bushing annular groove 405 and side opening 406 are intersecting, and the center of the ball cup 1 has bulb centre bore
101, the ball cup 1 is circumferential to be symmetrically arranged with bulb side opening 102, the bulb side opening 102 and left lubrication hole 204 and right lubrication
Hole 205 is intersected, and the both ends of the surface of the roller 3 have roller cannelure 301, and the flat groove 501 connects with side opening 406, the side
Hole 406 is located on the axial intermediate cross-section of roller 3.
2 are milled out on the bulb side opening 102 of 2 × R2, tappet housing on the top periphery of ball cup 1 increases the left profits of 2 × φ 5
Slide opening 204 and the fuel feed hole of right lubrication hole 205, the flow of machine oil is by 0.3m3/ h increases to 0.9m3/ h, so ensures tappet housing
The oilholes of 2 × φ 5 on the smooth entrance tappet housing of machine oil in top, then down flow to 2 liang of the both ends of the surface of roller 3 and tappet housing
Inner face is lubricated, cools down, it is to avoid the both ends of the surface of roller 3 lack with the top inorganic oil lubrication of 2 liang of inner faces of tappet housing
Point.
The inside and outside helical groove structure of bushing 4 is changed to the bushing annular groove 405 of bushing and the structure of side opening 406, can so ensure machine
Oil is entered from middle part, through the contact surface of excircle of bushing face and roller inner headed face, then flow to both sides end face, it is to avoid bushing
During inside and outside helical groove structure, machine oil flows directly into both sides end face and is not passed through the shortcoming in excircle of bushing face and roller inner headed face.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
1. a kind of structure for preventing cam shaft for diesel engine from chewing, it is characterised in that include：Cam mechanism and tappet component, it is described
Cam mechanism includes：Camshaft, is equipped with cam on the camshaft, the tappet component includes：Tappet housing, the tappet
Housing upper has shoulder hole, and the shoulder hole is equipped with ball cup, the space shape between the ball cup outside and tappet housing
Into can be used to accommodate the fluid space of pressure machine oil, the tappet housing bottom is equipped with roller by bearing pin, the bearing pin with
There is bushing, the bearing pin on tappet housing, is moistened on the tappet housing by screw lock with housing between roller
Slide opening one, housing lubrication hole two and housing lubrication hole three, the housing lubrication hole three connects with the flat groove on bearing pin, described to endure
Also there is the left lubrication hole and right lubrication hole for being through to roller, the left lubrication hole and right lubrication hole and roller phase on post housing
Hand over.
2. a kind of structure for preventing cam shaft for diesel engine from chewing according to claim 1, it is characterised in that：In the bushing
Surface has bushing annular groove, and the bush side wall has the side opening for running through, and the bushing annular groove and side opening are intersecting.
3. a kind of structure for preventing cam shaft for diesel engine from chewing according to claim 2, it is characterised in that：The ball cup
Center has a bulb centre bore, and the ball cup is circumferentially symmetrically arranged with bulb side opening, the bulb side opening and left lubrication hole and
Right lubrication hole intersects.
4. a kind of structure for preventing cam shaft for diesel engine from chewing according to claim 3, it is characterised in that：The roller two
End face has roller cannelure.
5. a kind of structure for preventing cam shaft for diesel engine from chewing according to claim 4, it is characterised in that：The flat groove
Connect with side opening.
6. a kind of structure for preventing cam shaft for diesel engine from chewing according to claim 5, it is characterised in that：The side opening position
On the intermediate cross-section of roller axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621093729.9U CN206158817U (en) | 2016-09-30 | 2016-09-30 | Prevent that diesel engine camshaft from gnawing wounded structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621093729.9U CN206158817U (en) | 2016-09-30 | 2016-09-30 | Prevent that diesel engine camshaft from gnawing wounded structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206158817U true CN206158817U (en) | 2017-05-10 |
Family
ID=58652281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621093729.9U Withdrawn - After Issue CN206158817U (en) | 2016-09-30 | 2016-09-30 | Prevent that diesel engine camshaft from gnawing wounded structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206158817U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224049A (en) * | 2016-09-30 | 2016-12-14 | 四川中车玉柴发动机股份有限公司 | A kind of structure preventing cam shaft for diesel engine from chewing |
-
2016
- 2016-09-30 CN CN201621093729.9U patent/CN206158817U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224049A (en) * | 2016-09-30 | 2016-12-14 | 四川中车玉柴发动机股份有限公司 | A kind of structure preventing cam shaft for diesel engine from chewing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170510 Effective date of abandoning: 20180814 |
|
| AV01 | Patent right actively abandoned |