CN204002959U - A kind of tappet with anti-rotating function and fuel pump - Google Patents
A kind of tappet with anti-rotating function and fuel pump Download PDFInfo
- Publication number
- CN204002959U CN204002959U CN201420205729.8U CN201420205729U CN204002959U CN 204002959 U CN204002959 U CN 204002959U CN 201420205729 U CN201420205729 U CN 201420205729U CN 204002959 U CN204002959 U CN 204002959U
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- China
- Prior art keywords
- tappet
- positioning hole
- housing
- lug boss
- rotating function
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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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- 239000000446 fuel Substances 0.000 title claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 210000002583 cell-derived microparticle Anatomy 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
With the tappet of anti-rotating function, comprise the housing with circle tube inner wall, rolling bearing and anti-rotation device, described housing is equipped with a rotatingshaft, described rolling bearing is installed on described housing by this rotatingshaft, and on the periphery of this housing, be also provided with positioning hole, described anti-rotation device is made up of symmetrical elasticity clamp, the cross section of this elasticity clamp is ohm-shaped, and it comprises curved lug boss, and be connected to the engagement portion of this lug boss both-side opening end, described elasticity clamp is forced to be installed in described positioning hole, and make described lug boss give prominence to the periphery that is arranged on this housing, and described engagement portion and positioning hole contacted inner surfaces touch.The utility model provide a kind of simple in structure, use reliable and manufacture the simply tappet with anti-rotating function, and use the fuel pump of this tappet.
Description
Technical field
The utility model relates to a kind of fuel pump, is specifically related to a kind of tappet with anti-rotating function and fuel pump.
Background technique
Tappet is for valve mechanism and pump drive assembly, to rotatablely moving of this axle is converted to translational motion valve or pump piston with at least one cam mating reaction camshaft or pump live axle.In the situation of the valve mechanism of internal-combustion engine, tappet contacts with affiliated air-exchanging valves with rocking arm by push rod in situation below camshaft is positioned in the time being moved further, and above camshaft is positioned at time, the tappet that is in most of the cases implemented as bucket tappet is directly placed between cam and air-exchanging valves.In pump drive assembly, tappet is directly arranged between the cam and corresponding pump piston of pump live axle too conventionally.
In addition, in order to minimize friction conventionally or form bending rolling surface on the ectosome of tappet, or ectosome is provided with rolling roller, and described rolling roller can be bearing in rotationally on ectosome and at cam place camshaft or pump live axle and roll.At this, correctly directed and correspondingly stop the less desirable torsion of tappet all the time with respect to corresponding cam in order to ensure rolling surface or rolling roller, tappet is typically provided with anti-torsion element, utilizes anti-torsion element tappet to turn round in the cylinder head of adjacent member, for example internal-combustion engine or the guide portion of pump case along stroke axis regularly in circumferential direction.At this, anti-torsion element is pressed in the corresponding through hole in the lateral side regions of ectosome conventionally.
But the less and heat treatment of the wall thickness of being made up of light weight of lateral side regions and coating layer portion cause: occur cracking in the time that anti-torsion element is pressed into through hole in the region of through hole.For fear of this cracking, to manufacture corresponding through hole and must correspondingly keep less tolerance in the time manufacturing affiliated anti-torsion element, this has brought expending in corresponding manufacturing process.Therefore, based on this fact, anti-torsion element is partly also otherwise arranged on ectosome, for example, in patent CN200780046644.2 by fix an anti-rotation assembly at housing periphery, pass through connecting method, realize its anti-rotating function, still, this fixed connection, because housing is to move up and down in the pump housing for a long time, be easy to cause anti-rotation assembly to come off; And draw a kind of tappet of bucket tappet form of the valve mechanism for internal-combustion engine at DE102004036106A1.At this, this tappet has hollow cylinder formula ectosome, be formed with the cooperation rolling surface for the cam of valve mechanism, and ectosome has the through hole of window-like in lateral side regions on it is distolateral.Anti-torsion element is contained in this through hole, anti-torsion element has the cross section of mushroom-like and is placed on the outer diameter of lateral side regions with setting face in the region of head, and anti-torsion element runs through through hole and utilizes handle to be attached in through hole with the handle setting out from the head.As the possibility of adhering to, DE102004036106A1 has advised the welding of handle and the through hole of anti-torsion element at this.
Above-mentioned several tappets with anti-rotating function, although it can be realized and prevent tappet rotation,, its complex structure, manufacture cost is high, is difficult to meet actual needs.
Model utility content
For solving the problems of the technologies described above, the purpose of this utility model be to provide a kind of simple in structure, use reliable and manufacture the simply tappet with anti-rotating function, and use the fuel pump of this tappet.
For achieving the above object, a kind of tappet with anti-rotating function of the utility model, comprise the housing with circle tube inner wall, rolling bearing and anti-rotation device, described housing is equipped with a rotatingshaft, described rolling bearing is installed on described housing by this rotatingshaft, and on the periphery of this housing, be also provided with positioning hole, it is characterized in that: described anti-rotation device is made up of symmetrical elasticity clamp, the cross section of this elasticity clamp is Greek alphabet " Ω " shape, and it comprises curved lug boss, and be connected to the engagement portion of this lug boss both-side opening end, described elasticity clamp is forced to be installed in described positioning hole, and make described lug boss give prominence to the periphery that is arranged on this housing, and described engagement portion and positioning hole contacted inner surfaces touch.
On the basis of such scheme, preferably, between described positioning hole and described elasticity clamp, be interference fit, and magnitude of interference is 0.02 to arrive 0.15mm.
On the basis of such scheme, preferably, the edge of described positioning hole is provided with chamfering.
On the basis of such scheme, preferably, the opening end spacing of described lug boss is less than the spacing between described two engagement portion free ends.
On the basis of such scheme, preferably, described positioning hole is rectangular opening.
On the basis of such scheme, preferably, described positioning hole is H shape.
On the basis of such scheme, preferably, described lug boss and joint, engagement portion are provided with Yi Katai, and described Ka Tai and the edge of described positioning hole fasten.
The utility model also provides a kind of fuel pump, comprise the above-mentioned tappet with anti-rotating function, the pump housing, it is characterized in that: the described pump housing is cylindrical, described pump housing inner headed face is provided with an elongated groove vertically, the lug boss of described tappet embeds and is fastened in described elongated groove, and can in described elongated groove, slide axially.
The utility model compared with prior art, its beneficial effect is: the utility model is by being symmetrical elasticity clamp by this anti-rotation device design, the cross section of this elasticity clamp is ohm-shaped, and it comprises curved lug boss and is connected to the engagement portion of this lug boss both-side opening end, this elasticity clamp is forced to be installed in positioning hole, and make the outstanding periphery that is arranged on this housing of lug boss, and engagement portion and positioning hole contacted inner surfaces are touched; In the time that the engagement portion of this elasticity clamp is pressed in positioning hole, due to curved lug boss effect, make the engagement portion that is arranged on lug boss two ends have the outward pressure that acts on positioning hole inner surface edge, thereby make the engagement portion of elasticity clamp because of himself elastic acting force, fit tightly the edge at positioning hole, the tappet radial rotating that prevents that to realize it tappet from being caused due to camshaft active force.Because the lug boss of elasticity clamp possesses certain self resiliently deformable, while making elasticity clamp be installed in positioning hole, can be by inside compression engagement portion to reduce the relative distance of two engagement portions, to adapt to the positioning hole of different machining accuracies, thereby the machining accuracy of positioning hole and elasticity clamp on reduction housing, to reach the object reducing production costs; Simultaneously, because tappet is in the time being installed in the pump housing, embed and be fastened in the elongated groove of pump housing inner headed face by the lug boss of elasticity clamp, thereby while making camshaft promote rolling bearing rotation, due to coordinating of lug boss and elongated groove, make tappet in the axial motion along this tappet, effectively to avoid tappet rotation to cause pump housing inner headed face serious wear, to affect the pump housing life-span.
Brief description of the drawings
Fig. 1 is the vehicle fuel pump structure schematic diagram the utlity model has with the tappet of anti-rotating function;
Fig. 2 is the first embodiment's three-dimensional structure diagram of anti-rotation device of the present utility model;
Fig. 3 is the first example structure schematic diagram of anti-rotation device of the present utility model;
Fig. 4 is the second example structure schematic diagram of anti-rotation device of the present utility model;
Fig. 5 is the third example structure schematic diagram of anti-rotation device of the present utility model;
Fig. 6 is the tappet three-dimensional structure diagram having with anti-rotating function of the present utility model;
Fig. 7 is the tappet cross-sectional view having with anti-rotating function of the present utility model;
Fig. 8 is the first structural representation of housing of the present utility model;
Fig. 9 is the second structural representation of housing of the present utility model;
In figure: 10. housing, 20. rolling bearings, 30. anti-rotation devices, 11. rotatingshafts, 12. positioning holes, 31. lug bosses, 32. engagement portions, 40. pump housings, 41. elongated grooves, 50. camshafts.
Embodiment
By describe in detail the utility model technology contents, structure characteristics, reached object and effect, below hereby exemplify embodiment and coordinate accompanying drawing to be explained in detail.
Refer to Fig. 1, and in conjunction with consulting shown in Fig. 2 to 9, the utility model provides a kind of tappet with anti-rotating function, comprise the housing 10 with circle tube inner wall, rolling bearing 20 and anti-rotation device 30, this housing 10 is provided with bearing hole, and a rotatingshaft 11 is housed in this bearing sky, rolling bearing 20 is installed on housing 10 by this rotatingshaft 11, and can rotate around rotatingshaft 11, and on the periphery of this housing 10, be also provided with positioning hole 12, wherein, this anti-rotation device 30 is made up of symmetrical elasticity clamp, the cross section of this elasticity clamp is ohm-shaped, be that its cross section is Greek alphabet " Ω " shape, and this cross section comprises curved lug boss 31, and be connected to the engagement portion 32 of these lug boss 31 both-side opening ends, this elasticity clamp is pressed into and is installed in positioning hole 12, and insert in this positioning hole 12 this engagement portion 32, this lug boss 31 is given prominence to and is arranged on the periphery of housing 10.
In the time that this elasticity clamp is installed, user is by inwardly compressing the engagement portion 32 of elasticity clamp, to reduce to be connected to the openings of sizes between the engagement portion 32 of lug boss 31 both-side opening ends, adapt to the pitch-row of positioning hole 12, in the time that positioning hole 12 is inserted respectively in engagement portion 32, engagement portion 32, due to the existence of himself elastic acting force, makes it have to the active force at external compression positioning hole 12 edges, thereby elasticity clamp is tightly fastened in positioning hole, to prevent the rotation of tappet.Because its engagement portion 32 of elasticity clamp has certain elastic reaction, can be by changing spacing between engagement portion 32 to adapt to the positioning hole 12 of different tolerances thereby make, thus can reduce the accuracy of manufacturing of positioning hole 12 and elasticity clamp, realize adaptivity assembling.
Preferably, in order to ensure the reliability of assembling between positioning hole 12 and elasticity clamp, prevent that it from causing elasticity clamp and positioning hole 12 to depart from because assembling pine, coordinating between this positioning hole 12 and elasticity clamp is preferably interference fit, and magnitude of interference is preferably 0.02 to 0.15mm.When assembling, can pass through elasticity clamp self resiliently deformable, adapt to the assembling between positioning hole 12, when after assembling, tappet is in the time axially doing straight line motion, elasticity clamp and positioning hole 12 edges, can be by two aspects to adapt to its fitted position, on the one hand by elasticity clamp self resiliently deformable, realize the adjusting to magnitude of interference, on the other hand, because interference fit makes to fit tightly between elasticity clamp and positioning hole 12, in the time of jib motion, phase mutual friction between elasticity clamp and positioning hole 12, by the wearing and tearing of surface of contact between positioning hole 12 and elasticity clamp, the burr of positioning hole 12 and elastic card panel edges is able to grinding and produces moulding distortion, to adapt to the adjusting of magnitude of interference.And the edge of this positioning hole 12 is provided with chamfering, to facilitate elasticity clamp to pack in this positioning hole 12.
Please continue to refer to shown in Fig. 1 to Fig. 2, the opening end spacing of the utility model lug boss 31 is less than described two cards and closes the spacing between portion's 32 free ends, and positioning hole 12 is H shape for rectangular opening or this positioning hole 12.In order to make to coordinate closelyr between elasticity clamp and positioning hole 12, this lug boss 31 is provided with Yi Katai with 32 joints, engagement portion, and the edge of Ka Tai and positioning hole 12 fastens.
Please continue to refer to Fig. 1, and in conjunction with shown in Fig. 6 to Fig. 9, in order to further illustrate the function and structure of anti-rotation device 30 of the present utility model, the utility model also provides a kind of fuel pump, comprise the above-mentioned tappet with anti-rotating function, the pump housing 40, and this pump housing 40 in a tubular form, and be provided with an elongated groove 41 vertically at the pump housing 40 inner headed faces, the housing 10 of tappet is installed in the pump housing 40, make housing 10 and the pump housing 40 be coaxial assembling, and the lug boss 31 of this tappet embeds and is fastened in this elongated groove 41, and can in described elongated groove 41, slide axially.When work, the rolling bearing 20 being installed on housing 10 rotates under the effect of camshaft 50, drive rolling bearing 20 to rotate, because the lug boss 31 of tappet is fastened in elongated groove 41, and this elongated groove 41 is the axial direction settings along the pump housing 40, make tappet relatively the pump housing 40 along axial motion, thereby realize restriction to tappet axial rotation.
In sum, be only the preferred embodiment of the utility model, do not limit protection domain of the present utility model with this, all equivalences of doing according to the utility model the scope of the claims and description change and modify, within being all the scope that the utility model patent contains.
Claims (8)
1. the tappet with anti-rotating function, comprise the housing with circle tube inner wall, rolling bearing and anti-rotation device, described housing is equipped with a rotatingshaft, described rolling bearing is installed on described housing by this rotatingshaft, and on the periphery of this housing, be also provided with positioning hole, it is characterized in that: described anti-rotation device is made up of symmetrical elasticity clamp, the cross section of this elasticity clamp is Greek alphabet " Ω " shape, and it comprises curved lug boss, and be connected to the engagement portion of this lug boss both-side opening end, described elasticity clamp is forced to be installed in described positioning hole, and make described lug boss give prominence to the periphery that is arranged on this housing, and described engagement portion and positioning hole contacted inner surfaces touch.
2. a kind of tappet with anti-rotating function as claimed in claim 1, is characterized in that: between described positioning hole and described elasticity clamp, be interference fit, and magnitude of interference is 0.02 to 0.15mm.
3. a kind of tappet with anti-rotating function as claimed in claim 1, is characterized in that: the edge of described positioning hole is provided with chamfering.
4. a kind of tappet with anti-rotating function as claimed in claim 1, is characterized in that: the opening end spacing of described lug boss is less than the spacing between described two engagement portion free ends.
5. a kind of tappet with anti-rotating function as claimed in claim 1, is characterized in that: described positioning hole is rectangular opening.
6. a kind of tappet with anti-rotating function as claimed in claim 1, is characterized in that: described positioning hole is H shape.
7. a kind of tappet with anti-rotating function as claimed in claim 1, is characterized in that: described lug boss and joint, engagement portion are provided with Ka Tai, and the edge of this Ka Tai and described positioning hole fastens.
8. a fuel pump, comprise the tappet with anti-rotating function, the pump housing as claimed in claim 1, it is characterized in that: the described pump housing is cylindrical, and this pump housing inner headed face is provided with an elongated groove vertically, the lug boss of described tappet embeds and is fastened in this elongated groove, and can in described elongated groove, slide axially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420205729.8U CN204002959U (en) | 2014-04-25 | 2014-04-25 | A kind of tappet with anti-rotating function and fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420205729.8U CN204002959U (en) | 2014-04-25 | 2014-04-25 | A kind of tappet with anti-rotating function and fuel pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204002959U true CN204002959U (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420205729.8U Expired - Lifetime CN204002959U (en) | 2014-04-25 | 2014-04-25 | A kind of tappet with anti-rotating function and fuel pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204002959U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420146A (en) * | 2016-05-04 | 2017-12-01 | 斯凯孚公司 | Cam driven roller apparatus |
| WO2021109028A1 (en) * | 2019-12-04 | 2021-06-10 | 舍弗勒技术股份两合公司 | Roller tappet |
-
2014
- 2014-04-25 CN CN201420205729.8U patent/CN204002959U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420146A (en) * | 2016-05-04 | 2017-12-01 | 斯凯孚公司 | Cam driven roller apparatus |
| CN107420146B (en) * | 2016-05-04 | 2020-12-08 | 斯凯孚公司 | Cam follower roller apparatus |
| WO2021109028A1 (en) * | 2019-12-04 | 2021-06-10 | 舍弗勒技术股份两合公司 | Roller tappet |
| CN114746627A (en) * | 2019-12-04 | 2022-07-12 | 舍弗勒技术股份两合公司 | Roller tappet |
| CN114746627B (en) * | 2019-12-04 | 2023-05-23 | 舍弗勒技术股份两合公司 | Roller tappet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhu Saipei Inventor before: Nigula |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: NI GULA TO: ZHU SAIPEI |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Tappet with rotation preventing function and fuel pump Effective date of registration: 20191119 Granted publication date: 20141210 Pledgee: Hubei Guo Chuang financing Company limited by guarantee Pledgor: WUHAN DONGFANG JUNCHI PRECISION MANUFACTURING CO.,LTD. Registration number: Y2019420000029 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231207 Granted publication date: 20141210 Pledgee: Hubei Guo Chuang financing Company limited by guarantee Pledgor: WUHAN DONGFANG JUNCHI PRECISION MANUFACTURING CO.,LTD. Registration number: Y2019420000029 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141210 |
|
| CX01 | Expiry of patent term |