CN209444383U - Roller tappet guide frame and engine - Google Patents
Roller tappet guide frame and engine Download PDFInfo
- Publication number
- CN209444383U CN209444383U CN201822141711.7U CN201822141711U CN209444383U CN 209444383 U CN209444383 U CN 209444383U CN 201822141711 U CN201822141711 U CN 201822141711U CN 209444383 U CN209444383 U CN 209444383U
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- roller tappet
- guide
- guide frame
- mounting groove
- engine
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Abstract
The utility model discloses a kind of engine and its roller tappet guide frames, roller tappet guide frame includes feather key, feather key includes the mounting portion and guide part being wholely set, the outer peripheral surface of roller tappet is provided with the guide groove with guide part cooperation, the mounting groove for feather key to be fixedly mounted is provided on engine body, the size of mounting groove is greater than the size of mounting portion, and installation position is connect in mounting groove and by locating piece and firm part with body；Engine includes roller tappet guide frame as described above；The engine and its roller tappet guide frame of the utility model, high in camshaft axis direction positioning accuracy, good to the guiding anti-rotation effect of roller tappet, the working depth of body mounting groove, requirement on machining accuracy are low, easy processing, the high yield rate after machining cylinder block mounting groove.
Description
Technical field
The utility model relates to technical field of engines, and in particular to a kind of roller tappet guide frame and include the idler wheel
The engine of tappet guide frame.
Background technique
Tappet is the important composition component in engine valve actuating mechanism, and driven member of the tappet as cam bears camshaft
The lateral force applied when rotation, effect is that the thrust of cam is passed to push rod or valve stem.
Tappet is divided into common tappet and hydraulic tappet, and common tappet is divided into flat tappet and roller tappet.Wherein, idler wheel is endured
It is rolling friction between column and cam, the more flat tappet of bearing capacity is high, is conducive to reduce tappet, cam wear, in engine
On application it is further extensive, still, need to prevent it from rotating in roller tappet operation process, to guarantee between idler wheel and cam
Normal contact, therefore roller tappet needs anti-rotation guiding measure.
In the prior art, light, the common roller tappet anti-rotation guiding measure of Medium or severe type diesel engine mainly include the following types:
One is process on body and lead with what feather key cooperated by feather key assembly on the tappet body of roller tappet
To slot, to be assembled convenient for tappet, communicated up and down after the processing of general orientation slot.Which the problem is that, on body processing lead
To slot, guide groove dimension precision requirement is high, high rejection rate after body kerve.
Another kind is to process guide groove on roller tappet body, and the guider screw with guide groove cooperation is assembled on body.
Which the problem is that, guider screw and guide groove contact surface are small, easily guider screw are caused to wear.
Another is to install positioning key in engine cylinder body top surface, positioning key is fixed in the locating slot of cylinder body, positioning key
Side plane and tappet on chain-wales cooperation limitation tappet rotation.Which the problem is that, locating slot on body rises
Part positioning action, high to the dimension precision requirement of locating slot, difficulty of processing is high, also, roller tappet is in camshaft axis side
Poor to positioning accuracy, guide effect is difficult to ensure.
Summary of the invention
In view of this, first technical problem to be solved in the utility model is: providing a kind of easy processing and be oriented to
The good roller tappet guide frame of anti-rotation effect.
Based on a total inventive concept, second technical problem to be solved in the utility model is: providing a kind of packet
Include the engine of the roller tappet guide frame of the utility model.
In order to solve the first technical problem mentioned above, the technical solution of the utility model is: roller tappet guide frame, described
Roller tappet guide frame includes:
Feather key, the feather key include the mounting portion and guide part being wholely set；
Guide groove, the guide groove are set to the outer peripheral surface of the roller tappet, the extending direction of the guide groove and institute
The axial consistent of roller tappet is stated, the guide groove and the guide part cooperate；
Mounting groove, the mounting groove are set on body, and the size of the mounting groove is greater than the size of the mounting portion, institute
Installation position is stated to connect in the mounting groove and by locating piece and firm part with the body.
It is the place of the further improvement to the roller tappet guide frame of the utility model below:
Wherein, the mounting portion is vertical with the guide part.
Wherein, the mounting portion is wider than the mounting portion close to the guide part one far from the width of described guide part one end
The width at end.
Wherein, the two sides of the guide part cooperate with the guide groove of two adjacent roller tappets respectively.
Wherein, the locating piece includes two positioning pins.
Wherein, the firm part includes fastening bolt.
To solve above-mentioned second technical problem, the technical solution of the utility model is: engine, and the engine includes
Body and the roller tappet being installed on the body, the engine further includes roller tappet guide frame as described above.
After above-mentioned technical proposal, the beneficial effects of the utility model are as follows:
Since the roller tappet guide frame of the utility model includes leading made of being wholely set as mounting portion and guide part
Xiang Jian is provided with the guide groove with guide part cooperation in the outer peripheral surface of roller tappet, is provided on body for being fixedly mounted
The mounting groove of feather key, the size of mounting groove are greater than the size of mounting portion, and installation position is in mounting groove and passing through locating piece
And firm part is connect with body；Camshaft rotates the process that pumps for converting the molded line profile of cam to roller tappet
In, cooperated by means of the guide groove of roller tappet outer peripheral surface and the guide part of feather key, realizes guiding, prevent roller tappet from revolving
Turn；Since the mounting groove size on body is greater than the mounting portion size of feather key, the periphery of mounting groove and the mounting portion of feather key
Periphery does not contact, and mounting groove only does installation and uses, and does not do guiding and uses, therefore, the working depth of body mounting groove, requirement on machining accuracy
It substantially reduces, the yield rate after machining cylinder block mounting groove greatly improves.
Since the mounting portion of feather key is wider than one end width of close guide part far from one end width of guide part, wide end makes
The slot bottom of mounting portion and body mounting groove has a biggish contact area, feather key it is solid and reliable；Narrow end makes mounting portion
Interference not will cause to the confined space between two roller tappets, it is ensured that roller tappet normally pumps.
It is flat by the slot bottom of mounting groove due to being provided with locating piece between the mounting groove on the mounting portion and body of feather key
Face and two positioning pins realize that plane and two pits position completely to feather key, and accurate positioning, roller tappet is in camshaft axis direction
Positioning accuracy is high, and guide effect is good.
Since the engine of the utility model includes roller tappet guide frame as described above, since the roller tappet is led
It is had above-mentioned technique effect to structure, the engine with the roller tappet guide frame also has corresponding technical effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment；
Fig. 2 is A-A schematic cross-sectional view in Fig. 1；
In figure: 1- positioning pin；2- fastener；3- roller tappet；31- guide groove；4- feather key；41- mounting portion；42- is led
To portion.
Specific embodiment
Further details of non-limitative illustration is made to the utility model with reference to the accompanying drawings and examples.
As Fig. 1 and Fig. 2 jointly shown in, the roller tappet guide frame of the utility model embodiment, comprising: feather key 4 is led
It include the mounting portion 41 and guide part 42 being wholely set to key 4, mounting portion 41 is preferably vertically arranged with guide part 42；It is endured in idler wheel
The outer peripheral surface of column 3 is provided with guide groove 31, the extending direction of guide groove 31 and roller tappet 3 it is axial consistent, guide groove 31 with
Guide part 42 cooperates, and preferred embodiment is that the two sides of guide part 42 cooperate with the guide groove 31 of two adjacent roller tappets 3 respectively,
The guiding anti-rotation to two roller tappets 3 is realized by a feather key 4；Mounting groove is provided on engine body (in figure
It is not specifically illustrated), and the size of mounting groove is greater than the size of the mounting portion 41 of feather key 4, the periphery of mounting groove and feather key 4
41 periphery of mounting portion do not contact, mounting groove only does installation and uses, do not do guiding and use, the working depth of body mounting groove, processing essence
Degree requires to substantially reduce, and mounting portion 41 is located in mounting groove and is connect by locating piece and firm part 2 with body.Specifically,
Firm part 2 is using conventional fastening bolt form.
As shown in Figure 1, wherein the mounting portion 41 of feather key 4 is wider than mounting portion 41 far from the width of 42 one end of guide part and leans on
The width of nearly 42 one end of guide part.Wide end makes mounting portion 41 and the slot bottom of body mounting groove have biggish contact area, guiding
Key 4 it is solid and reliable；Narrow end makes mounting portion 41 not will cause interference to the confined space between two roller tappets 3, really
Roller tappet 3 is protected normally to pump.
Wherein, locating piece includes two positioning pins 1；Correspondingly, organism location hole, feather key are set in body mounting groove
4 mounting portion 41 is provided with feather key through-hole, and positioning pin 1 wears feather key through-hole, body location hole.Due to the peace of feather key 4
It is provided with locating piece between mounting groove in dress portion 41 and body, by the slot bottom plane of mounting groove and two positioning pins 1, to leading
Realize that plane and two pits position completely to key 4, accurate positioning, roller tappet 3 is high in camshaft axis direction positioning accuracy, guiding and
Anti-rotation effect is good.
The utility model embodiment additionally provides a kind of engine, and engine includes: body, the idler wheel that is installed on body
Tappet 3, roller tappet guide frame as described above and other well known building blocks for a person skilled in the art；
Since the roller tappet guide frame has above-mentioned technique effect, the engine with the roller tappet guide frame also has phase
The technical effect answered.
Claims (7)
1. roller tappet guide frame, which is characterized in that the roller tappet guide frame includes:
Feather key, the feather key include the mounting portion and guide part being wholely set；
Guide groove, the guide groove are set to the outer peripheral surface of the roller tappet, the extending direction of the guide groove and the rolling
The axial consistent of tappet is taken turns, the guide groove and the guide part cooperate；
Mounting groove, the mounting groove are set on body, and the size of the mounting groove is greater than the size of the mounting portion, the peace
Dress portion is located in the mounting groove and is connect by locating piece and firm part with the body.
2. roller tappet guide frame as described in claim 1, which is characterized in that the mounting portion and the guide part hang down
Directly.
3. roller tappet guide frame as claimed in claim 2, which is characterized in that the mounting portion is far from the guide part one
The width at end is wider than the mounting portion close to the width of described guide part one end.
4. roller tappet guide frame as described in claim 1, which is characterized in that the two sides of the guide part respectively with it is adjacent
Two roller tappets guide groove cooperation.
5. roller tappet guide frame as described in claim 1, which is characterized in that the locating piece includes two positioning pins.
6. roller tappet guide frame as described in claim 1, which is characterized in that the firm part includes fastening bolt.
7. engine, the engine includes body and the roller tappet that is installed on the body, which is characterized in that the hair
Motivation further includes roller tappet guide frame as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822141711.7U CN209444383U (en) | 2018-12-19 | 2018-12-19 | Roller tappet guide frame and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822141711.7U CN209444383U (en) | 2018-12-19 | 2018-12-19 | Roller tappet guide frame and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209444383U true CN209444383U (en) | 2019-09-27 |
Family
ID=68014777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822141711.7U Active CN209444383U (en) | 2018-12-19 | 2018-12-19 | Roller tappet guide frame and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209444383U (en) |
-
2018
- 2018-12-19 CN CN201822141711.7U patent/CN209444383U/en active Active
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