CN215520996U - Camshaft of automobile engine - Google Patents
Camshaft of automobile engine Download PDFInfo
- Publication number
- CN215520996U CN215520996U CN202123065495.0U CN202123065495U CN215520996U CN 215520996 U CN215520996 U CN 215520996U CN 202123065495 U CN202123065495 U CN 202123065495U CN 215520996 U CN215520996 U CN 215520996U
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- Prior art keywords
- shaft
- pipe joint
- ring
- end surface
- shaft body
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 30
- 239000007787 solid Substances 0.000 abstract description 8
- 238000003780 insertion Methods 0.000 abstract description 7
- 230000037431 insertion Effects 0.000 abstract description 7
- 238000003466 welding Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 15
- 239000004519 grease Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Images
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- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model discloses a camshaft of an automobile engine, which comprises an end surface shaft and a shaft body, wherein the shaft body is hollow, the end surface shaft is inserted at the end part of the shaft body, a plurality of exhaust cams are arranged on the shaft body at intervals, the end surface shaft comprises a main shaft and a connecting part, a circle of shaft neck is formed between the main shaft and the connecting part, the outer diameter of the shaft neck is smaller than that of the main shaft and the connecting part, an axial oil duct is formed inside the end surface shaft, the oil duct axially penetrates through the whole end surface shaft, a plurality of oil holes are formed on the outer wall of the connecting part along the circumferential direction, the oil holes are communicated with the oil duct, a pipe joint is formed at the rear end of the connecting part, the pipe joint completely extends into the shaft body, an insertion toothed ring is formed on the pipe joint, a circle of toothed groove is formed on the inner wall of the shaft body, and the insertion toothed ring can be inserted into the toothed groove, the welding has solid fixed ring on the axis body inner wall, the tip joint of coupling is in the solid fixed ring.
Description
Technical Field
The utility model relates to the technical field of engine camshafts, in particular to a camshaft of an automobile engine.
Background
The camshaft is a component in a piston engine and is used for controlling the opening and closing actions of the valve, as shown in fig. 1, the conventional camshaft comprises a shaft body 1 and a cam 2, when the shaft body rotates, the cam 2 can be driven to rotate together, the valve is arranged in the rotating track of the cam 2, the valve is provided with a return spring, when the cam 2 rotates to be in contact with the valve, the valve can be opened by the valve, and when the cam 2 continues to rotate to be separated from the valve, the valve can be returned under the action of the return spring.
In order to fix the camshaft in a predetermined position, the camshaft has an end face shaft 3, and the end face shaft 3 is fixed to an end portion of the shaft body 1 by screwing. The end face shaft 3 of the traditional camshaft is generally fixed through a fastener, as shown in fig. 1, axial pin holes 17 can be formed in the end face shafts 3 at two ends of the camshaft, and the end face shafts 3 are fixed on reference surfaces by pins in cooperation with reference surfaces with the pin holes formed in the outer portions of the reference surfaces, so that the end face shafts are positioned.
However, the above fastening method requires the tightening of the pin, and in the process of tightening the pin, a large axial force is applied to the end surface shaft 3, which may cause the end surface shaft 3 to have a tendency of being axially fed into the shaft body 1, and may destroy the thread engagement relationship between the end surface shaft 3 and the shaft body 1, thereby causing the connection between the end surface shaft 3 and the shaft body 1 to be loose, and in addition, the relationship between the end surface shaft 3 and the shaft body 1 is a follow-up relationship, that is, the shaft body 1 rotates together with the end surface shaft 3 through the engagement relationship, and in this process, the pin may be subjected to the pressure action of the side surface, and may easily bend or even break after being used for a long time, thereby affecting the fixing strength between the end surface shaft 3 and the shaft body 1.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a camshaft of an automobile engine, which can improve the firmness of an upper end surface shaft of the camshaft.
The technical purpose of the utility model is realized by the following technical scheme:
a camshaft of an automobile engine comprises an end surface shaft and a shaft body, wherein the shaft body is hollow, the end surface shaft is inserted at the end part of the shaft body, a plurality of exhaust cams are arranged on the shaft body at intervals, the end surface shaft comprises a main shaft and a connecting part, a circle of shaft neck is formed between the main shaft and the connecting part, the outer diameter of the shaft neck is smaller than that of the main shaft and the connecting part, an axial oil duct is formed inside the end surface shaft, the oil duct axially penetrates through the whole end surface shaft, a plurality of oil holes are formed in the outer wall of the connecting part along the circumferential direction, the oil holes are communicated with the oil duct, a pipe joint is formed at the rear end of the connecting part, the pipe joint completely extends into the shaft body, an insertion toothed ring is formed on the pipe joint, a circle of toothed grooves are formed on the inner wall of the shaft body, and the insertion toothed ring can be inserted in the toothed grooves, the welding has solid fixed ring on the axis body inner wall, the tip joint of coupling is in the solid fixed ring.
In an improvement of the present invention, a fitting portion having an outer diameter smaller than that of the pipe joint is formed at an end of the pipe joint, a protrusion having an outer diameter larger than that of the fitting portion but smaller than that of the pipe joint is connected to an end of the fitting portion, a copper ring having an inner diameter slightly smaller than that of the protrusion is fitted over the fitting portion, the copper ring is pressed between the fitting portion and an inner wall of the shaft body, and the protrusion is engaged with the fixing ring.
As a further improvement of the utility model, a limit ring is sleeved on the connecting part.
Compared with the prior art, the scheme has the beneficial effects that: the end surface shaft is not pressed on the end surface of the shaft body through an axial pin any longer, but the end surface shaft is directly inserted into the shaft body to be clamped and fixed, in addition, in order to further improve the fixing firmness, a copper ring is designed to serve as an anti-falling part, and the copper ring is clamped between the end surface shaft and the inner wall of the shaft body through self elastic deformation of the copper ring, so that the end surface shaft and the shaft body are locked together; in addition, in order to realize that the shaft body drives the end face shaft to rotate, and reduce the pressure of joint position and copper ring at this in-process, it promotes transmission efficiency through the cooperation of inserting between ring gear and the tooth's socket, both make end face shaft and shaft body rotate synchronously through the meshing relation of tooth and tooth's socket, set up the oil duct in the end face shaft is inside simultaneously, carry gear oil to the meshing position through the oil duct and lubricate, reduce the wearing and tearing that insert ring gear and tooth's socket, increase of service life.
Drawings
FIG. 1 is a schematic view of a conventional camshaft configuration;
FIG. 2 is a schematic view of an exploded view of the end of a camshaft in an embodiment of the present invention;
FIG. 3 is a schematic view of a portion of the end shaft of FIG. 2;
fig. 4 is a sectional view showing a connection relationship between the end surface shaft and the shaft body.
Detailed Description
The following detailed description of the present invention is made with reference to the accompanying fig. 2-4 by way of specific embodiments, which are only illustrative and not limiting of the scope of the utility model.
As shown in fig. 2-4, the present embodiment discloses a camshaft of an automobile engine, including an end surface shaft 3 and a shaft body 1, the shaft body 1 is hollow, the end surface shaft 3 is inserted into an end portion of the shaft body 1 and partially extends into the shaft body 1, a plurality of exhaust cams 4 are arranged on the shaft body 1 at intervals, when the shaft body 1 rotates, the exhaust cams 4 can be driven to rotate together, a valve is arranged on a rotation track of the exhaust cams 4, the exhaust cams 4 are in a droplet-like shape when viewed from a cross section and are formed by an integrally formed circular portion and a tip, a center of the circular portion is a rotation center of the exhaust cams 4, and a distance between an edge of the circular portion and the rotation center is significantly smaller than a distance between the tip and the rotation center. The distance between the valve and the exhaust cam 4 is larger than the distance between the edge of the circular part and the rotation center and smaller than the distance between the tip and the rotation center, so that when the tip rotates to be in contact with the valve, the valve can be pressed to open the valve, and when the tip rotates to be separated from the valve, the valve can be reset under the elastic action of the valve reset spring, so that the valve is closed again.
The end face shaft 3 comprises a main shaft 5 and a connecting part 6, the outer diameters of the main shaft 5 and the connecting part 6 are equal, a circle of shaft neck 7 is arranged between the main shaft 5 and the connecting part 6, the outer diameter of the shaft neck 7 is smaller than the outer diameters of the main shaft 5 and the connecting part 6, an axial oil duct 8 is formed in the end face shaft 3, the oil duct 8 penetrates through the end face shaft 3 in a whole mode, openings are formed in the front end face and the rear end face of the end face shaft 3 respectively, and the openings in the rear end face (the end face of the connecting part 6) are communicated with the inside of the shaft body 1.
A plurality of oil holes 61 are formed in the outer wall of the connecting portion 6 in the circumferential direction, the oil holes 61 communicate with the oil passage 8, and lubricating grease can be infiltrated into the position of the insert ring 10, which will be described later, through the oil passage 8 and the oil holes 61 to lubricate, thereby reducing the mutual wear between the insert ring 10 and the tooth grooves.
A pipe joint 9 is formed at the rear end of the connecting portion 6, the pipe joint 9 is entirely extended in the shaft body 1 after the shaft body 1 is connected to the end surface shaft 3, an insertion ring gear 10 is formed on the pipe joint 9, a circle of tooth grooves is formed on the inner wall of the shaft body 1, and the insertion ring gear 10 can be inserted into the tooth grooves. The tooth width of the insert tooth ring 10 is equal to the groove width of the tooth groove, so that each tooth of the insert tooth ring 10 can be clamped into one tooth groove, and therefore the relative rotation between the shaft body 1 and the end face shaft 3 can be avoided.
The end of the pipe joint 9 is formed with a fitting part 11, the outer diameter of the fitting part 11 is smaller than the outer diameter of the pipe joint 9, the end of the fitting part 11 is connected with a convex part 12, the outer diameter of the convex part 12 is larger than the outer diameter of the fitting part 11 but smaller than the outer diameter of the pipe joint 9, a copper ring 13 is sleeved on the fitting part, the copper ring 13 has certain elasticity, so that the copper ring can be deformed under pressure to change the diameter, the inner diameter of the copper ring 13 is slightly smaller than the outer diameter of the convex part 12, the slightly smaller means that the inner diameter of the copper ring 13 is smaller than the outer diameter of the convex part 12, but when the convex part 12 extends, the copper ring 13 can be expanded by the elasticity of the copper ring 13, so that the difference between the inner diameter of the copper ring 13 and the outer diameter of the convex part 12 is within the elastic expansion range of the copper ring 13.
The copper ring 13 can pass through the protruding part 12 by interference fit and then be sleeved on the assembling part 11, the outer diameter of the assembling part 11 is approximately equal to the initial inner diameter of the copper ring 13, and after the copper ring 13 is sleeved on the assembling part 11, the pipe joint 9 and the protruding part 12 can limit the copper ring 13 on the assembling part 11. The whole pipe joint 9 extends into the shaft body 1, the inner diameter of the shaft body 1 is slightly smaller than the outer diameter of the copper ring 13 sleeved on the assembly part 11, an arc-shaped surface is formed on the copper ring 13, a guide inclined surface 16 is formed at the rear end of the shaft body 1, the copper ring 13 can extend into the shaft body 1 along with the pipe joint 9 due to the design of the arc-shaped surface matched with the guide inclined surface 16, and then the copper ring is extruded between the inner wall of the shaft body 1 and the assembly part 11, and the surface of the copper ring can be prevented from being scratched due to the design of the arc-shaped surface.
And still the welding has solid fixed ring 15 on the inner wall of axis body 1, and solid fixed ring 15's center is formed with the card hole, and bulge 12 can be when extending to solid fixed ring 15 position the joint in foretell card hole, utilizes bulge 12 and solid fixed ring 15's joint relation to make terminal surface axle 3 link together with axis body 1, still promotes the fixed firmness between terminal surface axle 3 and the axis body 1 through the frictional force between copper ring 13 and the axis body 1 inner wall in addition.
The connecting portion is sleeved with a limiting ring 14, when the pipe joint 9 is inserted to a designated position, the end face of the shaft body 1 abuts against the surface of the limiting ring 14, so that the pipe joint 9 is prevented from continuing to extend into the inside of the shaft body 1, namely the limiting ring 14 limits the deepest depth of the pipe joint 9 extending into the shaft body 1. Meanwhile, in order to prevent the position of the limit ring 14, which blocks the grease from penetrating into the insertion ring gear 10, an annular gap is formed between the limit ring 14 and the connecting portion 6, the width of the gap is small, and the limit ring 14 is connected with the connecting portion 6 through a plurality of connecting rods. In this embodiment, in order to prevent the lubricant grease from penetrating into the position of the copper ring 13 and further reduce the friction between the copper ring 13 and the inner wall of the shaft body 1, the lubricant grease selected is low-fluidity gear grease, such as high-viscosity gear grease with low viscosity, which is a lubricant paste refined by thickening ultra-high-viscosity synthetic oil with lithium soap thickener and adding additives such as antioxidant and anti-corrosion, and has excellent noise reduction, lubrication, wear resistance and durability.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (3)
1. The utility model provides an automobile engine's camshaft, including terminal surface axle and axis body, the inside cavity of axis body, the terminal surface axle is pegged graft the tip of axis body the interval is provided with a plurality of exhaust cams, its characterized in that on the axis body: the end surface shaft comprises a main shaft and a connecting portion, a circle of shaft neck is formed between the main shaft and the connecting portion, the outer diameter of the shaft neck is smaller than that of the main shaft and the connecting portion, an axial oil duct is formed inside the end surface shaft, the oil duct axially penetrates through the whole end surface shaft, a plurality of oil holes are formed in the outer wall of the connecting portion along the circumferential direction, the oil holes are communicated with the oil duct, a pipe joint is formed at the rear end of the connecting portion, the pipe joint extends into the shaft body completely, an inserting toothed ring is formed on the pipe joint, a circle of toothed grooves are formed in the inner wall of the shaft body, the inserting toothed ring can be inserted into the toothed grooves, a fixing ring is welded to the inner wall of the shaft body, and the end portion of the pipe joint is clamped in the fixing ring.
2. The camshaft of an automobile engine according to claim 1, characterized in that: the pipe joint comprises a pipe joint body, a pipe joint body and a pipe joint body, wherein the pipe joint body is provided with a shaft body, the end part of the pipe joint body is provided with an assembling part, the outer diameter of the assembling part is smaller than that of the pipe joint body, the end part of the assembling part is connected with a protruding part, the outer diameter of the protruding part is larger than that of the assembling part but smaller than that of the pipe joint body, a copper ring is sleeved on the assembling part, the inner diameter of the copper ring is slightly smaller than that of the protruding part, the copper ring can be extruded between the assembling part and the inner wall of the shaft body, and the protruding part is clamped in a fixed ring.
3. The camshaft of an automobile engine according to claim 2, characterized in that: the connecting part is sleeved with a limiting ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123065495.0U CN215520996U (en) | 2021-12-08 | 2021-12-08 | Camshaft of automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123065495.0U CN215520996U (en) | 2021-12-08 | 2021-12-08 | Camshaft of automobile engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215520996U true CN215520996U (en) | 2022-01-14 |
Family
ID=79798595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123065495.0U Active CN215520996U (en) | 2021-12-08 | 2021-12-08 | Camshaft of automobile engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215520996U (en) |
-
2021
- 2021-12-08 CN CN202123065495.0U patent/CN215520996U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231016 Address after: 334000, No. 40, Luyang Industrial Park 1st Road, Shangrao High tech Zone, Guangfeng District, Shangrao City, Jiangxi Province Patentee after: Shangrao Tongxin Automotive Parts Co.,Ltd. Address before: 315000 No. 158, Xingci Second Road, Hangzhou Bay New Area, Ningbo City, Zhejiang Province Patentee before: NINGBO TONGXIN AUTO PARTS CO.,LTD. |
|
| TR01 | Transfer of patent right |