CN215633194U - Valve transmission assembly - Google Patents
Valve transmission assembly Download PDFInfo
- Publication number
- CN215633194U CN215633194U CN202121714848.2U CN202121714848U CN215633194U CN 215633194 U CN215633194 U CN 215633194U CN 202121714848 U CN202121714848 U CN 202121714848U CN 215633194 U CN215633194 U CN 215633194U
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- CN
- China
- Prior art keywords
- roller
- tappet
- cam
- tappet body
- mounting groove
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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 - Fee Related
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Abstract
The utility model relates to the field of engine accessories and discloses a valve transmission assembly, which comprises a cam and a roller type tappet matched with the cam for use; the roller type tappet comprises a tappet body, wherein the bottom end of the tappet body is provided with an installation groove; the roller is installed in the installation groove through a rotating shaft, and the roller can rotate around the axis direction of the rotating shaft relative to the tappet body. The bottom of tappet body has the mounting groove, installs the gyro wheel through the pivot in the mounting groove, and the gyro wheel can revolute the axis direction of rotation and rotate for the tappet body to the axial motion of restriction tappet and cam, both convenient assembling can also improve the life of each spare part in the valve drive subassembly.
Description
Technical Field
The utility model relates to the technical field of engine accessories, in particular to a valve transmission assembly.
Background
The tappet is a key part in an engine valve mechanism, and the function and the working principle of the tappet are as follows: the tappet is installed in a tappet hole in the machine body, the lower part of the tappet is in contact with the cam shaft, the profile of the molded line of the cam is converted into the vertical reciprocating motion of the tappet through the rotation of the cam shaft, the vertical reciprocating motion is transmitted to the rocker arm through the push rod inserted in the inner cavity of the tappet, and finally the opening and closing actions of the air inlet valve and the air outlet valve are realized through the rocker arm.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a valve transmission assembly for limiting axial movement of a tappet and a cam.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a valve transmission assembly, which comprises a cam and a roller type tappet matched with the cam for use;
the roller type tappet comprises a tappet body, wherein the bottom end of the tappet body is provided with an installation groove;
the roller is installed in the installation groove through a rotating shaft, and the roller can rotate around the axis direction of the rotating shaft relative to the tappet body.
The valve transmission assembly provided by the utility model comprises a tappet body, wherein the bottom end of the tappet body is provided with a mounting groove, a roller is mounted in the mounting groove through a rotating shaft, and the roller can rotate relative to the tappet body around the axial direction of the rotating shaft so as to limit the axial movement of the tappet and a cam, so that the assembly is convenient, and the service life of each part in the valve transmission assembly can be prolonged.
Optionally, the roller at least partially protrudes out of the tappet body;
the part of the roller extending out of the tappet body is matched with the cam.
Optionally, the portion of the roller that protrudes out of the tappet body is smaller than the radius of the roller.
Optionally, the tappet body is provided with the mounting groove, so that a first side wall and a second side wall are formed at positions where the tappet body is provided with the mounting groove, and the thickness of the first side wall is the same as that of the second side wall along the length direction of the rotating shaft.
Optionally, comprising: two positioning parts are arranged on two end faces of the cam along the direction perpendicular to the rotation direction of the cam, a positioning groove is formed between the two positioning parts, and the positioning groove is matched with a roller in the roller tappet.
Optionally, the cam at least partially extends into the mounting groove at the bottom end of the tappet body, a first side wall and a second side wall are formed at positions where the tappet body is provided with the mounting groove, and both the first side wall and the second side wall are attached to the cam.
Optionally, the top end of the tappet body is provided with a cavity;
the tappet body is provided with an oil duct, one end of the oil duct is communicated with the cavity, and the other end of the oil duct is communicated with the mounting groove.
Optionally, when there are two oil ducts, the opening of one oil duct is located at a contact position between one side of the roller and the inner wall of one side of the mounting groove, and the opening of the other oil duct is located at a contact position between the other side of the roller and the inner wall of the other side of the mounting groove.
Optionally, the rotating shaft penetrates through the roller, and two ends of the rotating shaft are connected with the tappet body.
Optionally, the rotating shaft penetrates through a central shaft of the roller.
Drawings
FIG. 1 is a schematic illustration of a valve train assembly according to an embodiment of the present invention;
FIG. 2 is a schematic view of a roller lifter according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of another valve train assembly provided by an embodiment of the present invention;
FIG. 4 is a schematic view of another roller lifter according to an embodiment of the present invention.
Icon: 100-a tappet body; 110-a mounting groove; 120-a first sidewall; 130-a second side wall; 140-a cavity; 150-oil gallery; 200-a roller; 300-a rotating shaft; 400-cam; 410-a positioning section; 420-positioning groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The tappet is divided into a flat-bottom tappet and a roller tappet according to the structural types. The flat bottom tappet is in contact with the cam 400 through a bottom plane and is in sliding friction; the roller lifter is in contact with the cam 400 through the roller 200, and is in rolling friction. Roller type tappet among the prior art includes the tappet body, the tappet inner chamber that is used for drawing the dress push rod is offered to the tappet body upper end, tappet body bottom is opened there is gyro wheel 200 groove, gyro wheel 200 inslot is installed through the round pin axle and is stretched out gyro wheel 200 of tappet body bottom end face, round pin axle and tappet body interference fit, gyro wheel 200 rotates and its cylinder and cam 400 contact around the round pin axle, tappet inner chamber bottom surface is equipped with the straight through-hole of leading directly to the central point of gyro wheel 200 groove roof put, thereby this straight through-hole is used for carrying lubricating oil to lubricated gyro wheel 200 and cam 400's contact surface on gyro wheel 200's the cylinder, still be equipped with the guide key that the cross-section is the rectangle on the tappet body.
Example one
As shown in FIG. 1, an embodiment of the present invention provides a valve train assembly including a cam 400, and a roller lifter cooperating with the cam 400;
the roller type tappet comprises a tappet body 100, and the bottom end of the tappet body 100 is provided with an installation groove 110;
and a roller 200, the roller 200 being mounted in the mounting groove 110 by a rotation shaft 300, the roller 200 being rotatable with respect to the tappet body 100 about an axial direction of the rotation shaft 300.
The valve driving assembly provided by the utility model comprises a tappet body 100, wherein the bottom end of the tappet body 100 is provided with a mounting groove 110, a roller 200 is mounted in the mounting groove 110 through a rotating shaft 300, the roller 200 can rotate relative to the tappet body 100 around the axial direction of the rotating shaft 300, at least part of the roller 200 extends out of the tappet body 100, the roller 200 extending out of the tappet body 100 is matched with a cam 400 to limit the axial movement of the tappet and the cam 400, the assembly is convenient, and the service life of each part in the valve driving assembly can be prolonged.
Optionally, the roller 200 protrudes at least partially out of the tappet body 100;
the portion of the roller 200 protruding out of the tappet body 100 is engaged with the cam 400.
And the roller 200 at least partially protrudes out of the tappet body 100, and the roller 200 protruding out of the tappet body 100 is matched with the cam 400 to limit the axial movement of the tappet and the cam 400, so that the assembly is convenient, and the service life of each part in the valve transmission assembly can be prolonged.
Optionally, the shaft 300 penetrates the roller 200, and at least one end of the shaft 300 is connected to the tappet body 100. Specifically, the rotating shaft 300 penetrates through the roller 200, both ends of the rotating shaft 300 are connected to the tappet body 100, and the rotating shaft 300 penetrates through the roller 200, so that the position of the roller 200 is fixed more stably.
In order to ensure the stability of the lifter up and down movement driven by the roller 200, the rotating shaft 300 penetrates through the central axis of the roller 200, so that whenever the cam 400 moves to drive the roller 200 to move, the acting force of the cam 400 on the roller 200 is uniform on any surface of the roller 200, and the roller 200 is not easily damaged.
Alternatively, the portion of the roller 200 protruding out of the lifter body 100 is smaller than the radius of the roller 200.
Optionally, the tappet body 100 is provided with the mounting groove 110, so that the first side wall 120 and the second side wall 130 are formed at a position where the tappet body 100 has the mounting groove 110, and the thickness of the first side wall 120 is the same as that of the second side wall 130 along the length direction of the rotating shaft 300, that is, the mounting groove 110 is located on the axial line of the tappet body 100, and the roller 200 is also located in the middle of the mounting groove 110, so that the force applied to the roller 200 at the two ends of the rotating shaft 300 is balanced.
As shown in fig. 2, the top end of the tappet body 100 has a cavity 140;
the tappet body 100 is provided with an oil passage 150, one end of the oil passage 150 is communicated with the cavity 140, and the other end is communicated with the mounting groove 110.
The oil is drained through the oil passage 150, so that the lubricating of the matching end face of the roller 200 and the cam 400 is maintained, the friction force is reduced, and the service life can be prolonged.
Alternatively, when there are two oil passages 150, an opening of one oil passage 150 is located at a contact portion of one side of the roller 200 and an inner wall of one side of the mounting groove 110, and an opening of the other oil passage 150 is located at a contact portion of the other side of the roller 200 and an inner wall of the other side of the mounting groove 110. The design scheme of the two oil passages 150 further keeps the lubrication of the matching end surfaces of the roller 200 and the cam 400, reduces the friction force and can prolong the service life.
The valve drive assembly provided by the embodiment of the utility model comprises: along the rotation direction of the vertical cam 400, two positioning parts 410 are arranged on two end faces of the cam 400, a positioning groove 420 is formed between the two positioning parts 410, and the positioning groove 420 is matched with the roller 200 in the roller tappet.
Two location portions 410 that cam 400 both ends face have are higher than the contact surface of cam 400 and gyro wheel 200 to make be formed with constant head tank 420 between two location, two location portions 410 that are higher out can wrap up gyro wheel 200, form clearance fit with gyro wheel 200, and the restriction tappet produces rotatoryly, keeps gyro wheel 200 and tappet line contact, and both convenient assembling of the mounting means of cam 400 and the gyro wheel 200 of tappet can also improve life.
Example two
As shown in FIG. 3, an alternative valve train assembly is provided by an embodiment of the present invention, including a cam 400, and a roller lifter used in conjunction with the cam 400;
the roller type tappet comprises a tappet body 100, and the bottom end of the tappet body 100 is provided with an installation groove 110;
and a roller 200, the roller 200 being mounted in the mounting groove 110 by a rotation shaft 300, the roller 200 being rotatable with respect to the tappet body 100 about an axial direction of the rotation shaft 300.
The valve driving assembly provided by the utility model comprises a tappet body 100, wherein the bottom end of the tappet body 100 is provided with a mounting groove 110, a roller 200 is mounted in the mounting groove 110 through a rotating shaft 300, the roller 200 can rotate relative to the tappet body 100 around the axial direction of the rotating shaft 300, at least part of the roller 200 extends out of the tappet body 100, the roller 200 extending out of the tappet body 100 is matched with a cam 400 to limit the axial movement of the tappet and the cam 400, the assembly is convenient, and the service life of each part in the valve driving assembly can be prolonged.
As shown in fig. 4, the cam 400 at least partially extends into the mounting groove 110 at the bottom end of the tappet body 100, the first sidewall 120 and the second sidewall 130 are formed at the position of the tappet body 100 having the mounting groove 110, and both the first sidewall 120 and the second sidewall 130 are attached to the cam 400.
Specifically, the lower portions of the first sidewall 120 and the second sidewall 130 of the tappet body 100 are higher than the roller 200 to form positioning end surfaces, and form clearance fit with the cam 200 to limit the rotation of the tappet and keep the roller 200 in line contact with the tappet.
Optionally, the shaft 300 penetrates the roller 200, and at least one end of the shaft 300 is connected to the tappet body 100. Specifically, the rotating shaft 300 penetrates through the roller 200, both ends of the rotating shaft 300 are connected to the tappet body 100, and the rotating shaft 300 penetrates through the roller 200, so that the position of the roller 200 is fixed more stably.
In order to ensure the stability of the lifter up and down movement driven by the roller 200, the rotating shaft 300 penetrates through the central axis of the roller 200, so that whenever the cam 400 moves to drive the roller 200 to move, the acting force of the cam 400 on the roller 200 is uniform on any surface of the roller 200, and the roller 200 is not easily damaged.
The top end of the tappet body 100 is provided with a cavity 140;
the tappet body 100 is provided with an oil passage 150, one end of the oil passage 150 is communicated with the cavity 140, and the other end is communicated with the mounting groove 110.
The oil is drained through the oil passage 150, so that the lubricating of the matching end face of the roller 200 and the cam 400 is maintained, the friction force is reduced, and the service life can be prolonged.
Alternatively, when there are two oil passages 150, an opening of one oil passage 150 is located at a contact portion of one side of the roller 200 and an inner wall of one side of the mounting groove 110, and an opening of the other oil passage 150 is located at a contact portion of the other side of the roller 200 and an inner wall of the other side of the mounting groove 110. The design scheme of the two oil passages 150 further keeps the lubrication of the matching end surfaces of the roller 200 and the cam 400, reduces the friction force and can prolong the service life.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A valve train assembly, comprising a cam, and a roller lifter for cooperation with the cam;
the roller type tappet comprises a tappet body, wherein the bottom end of the tappet body is provided with an installation groove;
the roller is installed in the installation groove through a rotating shaft, and the roller can rotate around the axis direction of the rotating shaft relative to the tappet body.
2. A valve train assembly as claimed in claim 1, characterized by said roller at least partially protruding out of said lifter body;
the part of the roller extending out of the tappet body is matched with the cam.
3. A valve train assembly as claimed in claim 2, wherein the portion of the roller that protrudes out of the lifter body is less than the radius of the roller.
4. A valve gear assembly according to claim 2, wherein the tappet body is provided with the mounting groove to form a first side wall and a second side wall at positions where the tappet body has the mounting groove, the first side wall and the second side wall having the same thickness along the length direction of the rotation shaft.
5. A valve train assembly as claimed in claim 2, comprising: two positioning parts are arranged on two end faces of the cam along the direction perpendicular to the rotation direction of the cam, a positioning groove is formed between the two positioning parts, and the positioning groove is matched with a roller in the roller tappet.
6. The valve train assembly of claim 1, wherein the cam extends at least partially into a mounting slot at a bottom end of the tappet body, the tappet body having the mounting slot being positioned to form a first sidewall and a second sidewall, the first sidewall and the second sidewall both engaging the cam.
7. A valve train assembly as claimed in claim 1, characterized by the top end of the lifter body having a cavity;
the tappet body is provided with an oil duct, one end of the oil duct is communicated with the cavity, and the other end of the oil duct is communicated with the mounting groove.
8. A valve train assembly as claimed in claim 7, wherein when there are two oil passages, the opening of one of the oil passages is located at the contact between one side of the roller and the inner wall of one side of the mounting groove, and the opening of the other oil passage is located at the contact between the other side of the roller and the inner wall of the other side of the mounting groove.
9. A valve train assembly as claimed in claim 2, wherein the shaft extends through the roller, both ends of the shaft being connected to the lifter body.
10. A valve train assembly as claimed in claim 9, characterized by the spindle extending through a central axis of the roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121714848.2U CN215633194U (en) | 2021-07-27 | 2021-07-27 | Valve transmission assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121714848.2U CN215633194U (en) | 2021-07-27 | 2021-07-27 | Valve transmission assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215633194U true CN215633194U (en) | 2022-01-25 |
Family
ID=79892418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121714848.2U Expired - Fee Related CN215633194U (en) | 2021-07-27 | 2021-07-27 | Valve transmission assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215633194U (en) |
-
2021
- 2021-07-27 CN CN202121714848.2U patent/CN215633194U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |