CN204457905U - A kind of tappet for internal combustion engine - Google Patents
A kind of tappet for internal combustion engine Download PDFInfo
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- CN204457905U CN204457905U CN201420836974.9U CN201420836974U CN204457905U CN 204457905 U CN204457905 U CN 204457905U CN 201420836974 U CN201420836974 U CN 201420836974U CN 204457905 U CN204457905 U CN 204457905U
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- groove
- tappet
- boss
- concave surface
- internal combustion
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Abstract
The utility model relates to technical field of internal combustion engines, a kind of tappet for internal combustion engine is provided, this tappet for internal combustion engine is provided with bottom surface and concave surface, bottom surface is provided with the first groove, this first groove is provided with the first boss, the cemented carbide body being cast with and contacting with described engine cam is inlayed in this first groove, concave surface is provided with the second boss, concave surface with the second boss for boundary is provided with the second groove and the 3rd groove, second groove extends to the second boss from the top of described concave surface, 3rd groove extends to concave bottom from the second boss, the alloyed steel body being cast with and extending to the 3rd groove from the second groove is inlayed in concave surface, alloyed steel body contacts with the push rod in tappet inner chamber, the cemented carbide body that realization contacts with engine cam and the alloyed steel body contacted with push rod adopt the stronger material of wear resistance respectively and inlay forging type and be connected with tappet, reduce the complexity of processing technology, tappet body no longer needs high-abrasive material to make simultaneously, reduce cost.
Description
Technical field
The utility model belongs to technical field of internal combustion engines, particularly relates to a kind of tappet for internal combustion engine.
Background technique
Tappet is the driven member of cam, and its function passes to push rod or valve by from the motion of cam and active force, also bears lateral force that cam applies simultaneously and is passed to body or cylinder head.In tappet for internal combustion engine, due to the poor lubrication between tappet bottom surface and camshaft and between concave surface and push rod, and the two contact stress improving constantly and increase with engine power and rotating speed, there is a large amount of tappet wear-out failure, for improving wear resistance, tappet many employings Rapid Tool Steel or alloyed steel nitriding treatment, make tappet manufacture cost higher.
In order to solve the problem, general employing combined type tappet at present, namely in tappet underrun vacuum brazing, hard metal tip is welded on tappet body, reach the object of hardness higher than tappet body hardness of tappet bottom surface, but brazing mode complex process, and the flatness that the hard metal tip of tappet bottom surface welds with tappet body and soundness cannot be ensured.
Model utility content
The purpose of this utility model is to provide a kind of tappet for internal combustion engine, be intended to solve the bottom surface of tappet for internal combustion engine and the lubricating condition of concave surface in prior art poor, tappet bottom surface hardness is increased at bottom surface welding alloy sheet mode by brazing mode, its welding procedure is complicated, and cannot ensure the problem of the flatness that the hard metal tip of tappet bottom surface welds with tappet body and soundness.
The utility model realizes like this, a kind of tappet for internal combustion engine, described tappet for internal combustion engine is provided with bottom surface and concave surface, described bottom surface contacts with engine cam, described concave surface is arranged in tappet intracavity bottom, described bottom surface is provided with the first groove, described first groove is provided with the first boss, the cemented carbide body being cast with and contacting with described engine cam is inlayed in described first groove, described concave surface is provided with the second boss, described concave surface with described second boss for boundary is provided with the second groove and the 3rd groove, described second groove extends to described second boss from the top of described concave surface, described 3rd groove extends to described concave bottom from described second boss, the alloyed steel body being cast with and extending to described 3rd groove from described second groove is inlayed in described concave surface, described alloyed steel body contacts with the push rod in described tappet inner chamber.
As a kind of improved plan, described first groove is T-slot.
As a kind of improved plan, described first groove is dovetail groove.
As a kind of improved plan, described 3rd groove is T-slot.
As a kind of improved plan, described 3rd groove is dovetail groove.
Because tappet for internal combustion engine is provided with bottom surface and concave surface, bottom surface is provided with the first groove, this first groove is provided with the first boss, the cemented carbide body being cast with and contacting with described engine cam is inlayed in this first groove, concave surface is provided with the second boss, concave surface with the second boss for boundary is provided with the second groove and the 3rd groove, second groove extends to the second boss from the top of described concave surface, 3rd groove extends to concave bottom from the second boss, the alloyed steel body being cast with and extending to the 3rd groove from the second groove is inlayed in concave surface, alloyed steel body contacts with the push rod in tappet inner chamber, the cemented carbide body that realization contacts with engine cam and the alloyed steel body contacted with push rod adopt the stronger material of wear resistance respectively and inlay forging type and be connected with tappet, reduce the complexity of processing technology, tappet body no longer needs high-abrasive material to make simultaneously, reduce cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the tappet for internal combustion engine that the utility model embodiment one provides;
Fig. 2 is the enlarged view of A in Fig. 1;
Wherein, 1-bottom surface, 2-concave surface, 3-camshaft, 4-tappet inner chamber, 5-first groove, 6-first boss, 7-cemented carbide body, 8-second boss, 9-second groove, 10-the 3rd groove, 11-alloyed steel body.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 and Fig. 2 respectively illustrates the structural representation of the tappet for internal combustion engine that the utility model provides, and for convenience of explanation, only gives the part relevant to the utility model in figure.
Tappet for internal combustion engine is provided with bottom surface 1 and concave surface 2, described bottom surface 1 contacts with engine cam 3, described concave surface 2 is arranged in bottom tappet inner chamber 4, described bottom surface 1 is provided with the first groove 5, described first groove 5 is provided with the first boss 6, the cemented carbide body 7 being cast with and contacting with described engine cam 3 is inlayed in described first groove 5, described concave surface 2 is provided with the second boss 8, described concave surface 2 with described second boss 8 for boundary is provided with the second groove 9 and the 3rd groove 10, described second groove 9 extends to described second boss 8 from the top of described concave surface 2, described 3rd groove 10 extends to bottom described concave surface 2 from described second boss 8, the alloyed steel body 11 being cast with and extending to described 3rd groove 10 from described second groove 9 is inlayed in described concave surface 2, described alloyed steel body 11 contacts with the push rod in described tappet inner chamber.
In the utility model, above-mentioned first groove 5, second groove 9 and the 3rd groove 10 are set to embed founding type, wherein, second groove 9 is conventional invaginating, and the first groove 5 and the second groove 9 can be arranged according to actual conditions, namely the first groove 5 and the 3rd groove 10 can be set to T-slot or dovetail groove, and what provide in Fig. 1 and Fig. 2 is the situation of T-slot, and it specifically can be set to:
As depicted in figs. 1 and 2, the first groove 5 and the 3rd groove 10 are T-slot;
Can certainly the first groove 5 be T-slot, the 3rd groove 10 be dovetail groove;
Or the first groove 5 is dovetail groove, the 3rd groove 10 is T-slot;
Or the first groove 5 and the 3rd groove 10 are dovetail groove;
Above are only specific embodiment of the utility model, do not repeat them here, but not in order to limit the utility model.
In the utility model, tappet for internal combustion engine can adopt aluminum alloy material, alloyed steel body 11 is by quenching or nitriding treatment, above-mentioned cemented carbide body 7 is cast in this first groove 5 by inserted, alloyed steel body 11 is cast in the second groove 9 and the 3rd groove 10 by inserted, and its concrete implementation procedure is as described below:
Because the fusing point of the aluminum alloy material of internal-combustion engine is at about 700 degree, and the fusing point of cemented carbide body 7 and alloyed steel body 11 is all high than 700 degree, therefore, first tappet for internal combustion engine is fixed in casting system in advance, during casting, aluminum alloy melt forms tappet, and the cemented carbide body 7 of bottom surface 1 is then inclusive in the first groove 5, and the alloyed steel body 11 of concave surface 2 is inclusive in the second groove 9 and the 3rd groove 10;
After cooling, due to the fixation of the first boss 6 and the second boss 8, make cemented carbide body 7 be fixed in the first groove 5 firmly, alloyed steel body 11 is fixed in the second groove 9 and the 3rd groove 10 firmly.
In the utility model, tappet for internal combustion engine is provided with bottom surface and concave surface, bottom surface is provided with the first groove, this first groove is provided with the first boss, the cemented carbide body being cast with and contacting with described engine cam is inlayed in this first groove, concave surface is provided with the second boss, concave surface with the second boss for boundary is provided with the second groove and the 3rd groove, second groove extends to the second boss from the top of described concave surface, 3rd groove extends to concave bottom from the second boss, the alloyed steel body being cast with and extending to the 3rd groove from the second groove is inlayed in concave surface, alloyed steel body contacts with the push rod in tappet inner chamber, it has following technique effect:
(1) cemented carbide body and alloyed steel body are arranged in bottom surface and concave surface respectively by the mode of inlaying casting, make to be formed with the aluminum alloy material of internal combustion engine main body to distinguish, and reduce cost, and reduce the complexity of processing technology;
(2) the own wear resistance of material that contains of tappet concave surface and bottom surface is good, makes tappet without the need to manufacturing procedures such as extra nitrogenize, simplifies Making programme;
(3) by the setting of the first boss and the second boss, the structure of internal-combustion engine concave surface and bottom surface is combined firmly, there is higher reliability.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. a tappet for internal combustion engine, described tappet for internal combustion engine is provided with bottom surface (1) and concave surface (2), described bottom surface (1) contacts with engine cam (3), described concave surface (2) is arranged in tappet inner chamber (4) bottom, it is characterized in that, described bottom surface (1) is provided with the first groove (5), described first groove (5) is provided with the first boss (6), the cemented carbide body (7) being cast with and contacting with described engine cam (3) is inlayed in described first groove (5), described concave surface (2) is provided with the second boss (8), described concave surface (2) with described second boss (8) for boundary is provided with the second groove (9) and the 3rd groove (10), described second groove (9) extends to described second boss (8) from the top of described concave surface (2), described 3rd groove (10) extends to described concave surface (2) bottom from described second boss (8), the alloyed steel body (11) being cast with and extending to described 3rd groove (10) from described second groove (9) is inlayed in described concave surface (2), described alloyed steel body (11) contacts with the push rod in described tappet inner chamber.
2. tappet for internal combustion engine according to claim 1, is characterized in that, described first groove (5) is T-slot.
3. tappet for internal combustion engine according to claim 1, is characterized in that, described first groove (5) is dovetail groove.
4. tappet for internal combustion engine according to claim 1, is characterized in that, described 3rd groove (10) is T-slot.
5. tappet for internal combustion engine according to claim 1, is characterized in that, described 3rd groove (10) is dovetail groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420836974.9U CN204457905U (en) | 2014-12-25 | 2014-12-25 | A kind of tappet for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420836974.9U CN204457905U (en) | 2014-12-25 | 2014-12-25 | A kind of tappet for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204457905U true CN204457905U (en) | 2015-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420836974.9U Active CN204457905U (en) | 2014-12-25 | 2014-12-25 | A kind of tappet for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204457905U (en) |
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2014
- 2014-12-25 CN CN201420836974.9U patent/CN204457905U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |