CN211598773U - Camshaft structure - Google Patents
Camshaft structure Download PDFInfo
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- CN211598773U CN211598773U CN202020181650.1U CN202020181650U CN211598773U CN 211598773 U CN211598773 U CN 211598773U CN 202020181650 U CN202020181650 U CN 202020181650U CN 211598773 U CN211598773 U CN 211598773U
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Abstract
The utility model provides a camshaft structure belongs to camshaft technical field. The camshaft solves the problems that the existing camshaft can be stopped only by an auxiliary mechanical structure, the structure is complex, and the occupied installation space is large. This camshaft structure, including the axle, establish the cam, elastic component and the locking piece outside the axle in the cover, oil through channel has in the axle, has on the lateral wall of axle to be the recessed guide way of annular, and oil through channel and guide way communicate through the locking hole, and the outer end embedding of elastic component sets up in the cam, and the inner of elastic component links to each other with the locking piece, and under the effect of elastic component elasticity, the locking piece can be embedded into and make cam and axle fix a position in the locking hole. The camshaft structure has the advantages of compact structure of the cylinder deactivation technology of the engine and small occupied installation space.
Description
Technical Field
The utility model belongs to the technical field of the camshaft, a camshaft structure is related to.
Background
When the automobile works under the partial load working condition, the power utilization rate of the engine is actually lower, and in order to enable the engine to have high-efficiency fuel economy under the partial load working condition and meet increasingly severe emission regulations, the most effective way is to adopt an engine cylinder stopping technology.
The conventional engine cylinder deactivation technology needs to be realized by means of a mechanical structure, for example, chinese patent literature discloses a magnetoelectric drive rotary variable valve assembly [ application number: 201821819459.4, respectively; authorization notice number: CN209040910U ], the device mainly comprises a cam, a camshaft, a rotor body, a rotor bolt, a rotor gear, a stator core, a stator support bolt, a tappet, a valve spring, a valve guide, a cylinder cover, a bonding screw, a rocker arm, a pin shaft, a rocker arm support bolt and three groups of wire sets. The stator core is fixedly connected with the stator support and installed in the rocker arm, the rotor body is fixedly connected with the rotor gear and is connected with the rocker arm through threads and placed between the cam and the stator core, the three groups of lines are respectively wound on the opposite stator cores, the stator core attracts the rotor gear to drive the rotor body to rotate up and down after the power is turned on, the distance between the cam and the rotor body is changed, and therefore the opening time of the valve is changed.
The cam and the camshaft of this kind of structure link firmly, and rotor block, rotor bolt, rotor gear, stator core, stator support bolt, rocking arm, round pin axle, rocking arm support and rocking arm support bolt constitute middle driven mechanical structure, through this mechanical structure, can transmit the motion of cam for the valve, realize the opening of valve or close, but this mechanical structure, spare part is numerous, and the structure is complicated, occupies great installation space, can increase cost simultaneously.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem that exists among the prior art, provide a camshaft structure, the technical problem of solution makes the engine stall technical structure compact, and the installation space who occupies is little.
The purpose of the utility model can be realized by the following technical proposal: the utility model provides a camshaft structure, includes the axle and establishes the cam in the off-axial, its characterized in that still includes elastic component and locking piece, logical oil passageway has in the axle, it is the recessed guide way of annular to have on the lateral wall of axle, logical oil passageway and guide way communicate through the locking hole, the outer end embedding of elastic component sets up in the cam, the inner of elastic component links to each other with the locking piece, and under the effect of elastic component elastic force, the locking piece can be embedded into and make cam and axle fix a position in the locking hole.
Under the effect of elastic force of the elastic part, the locking part can be embedded into the locking hole to position the cam and the shaft, the cam and the shaft are in a locking state at the moment, the shaft can drive the cam to rotate together under the effect of the locking part, the cam can contact the air valve, the air valve can be opened and closed timely, and the engine can normally run under a heavy-load working condition. After the oil channel is communicated with the engine oil, the engine oil can flow into the locking hole and overcome the elastic force of the elastic piece to jack the locking piece, so that the locking piece is no longer positioned in the locking hole, the cam and the shaft are in an unlocking state at the moment, the rotation of the shaft can not be transmitted to the cam, the cam lacks enough force and can not open and close the valve, the air inlet and exhaust functions of the cylinder are realized, the ECU control command of the engine is matched to stop oil injection and ignition, the cylinder stopping function of the engine is realized, and energy conservation and emission reduction are realized. The elastic piece and the locking piece are positioned in the camshaft structure, the structure is compact, the occupied installation space is small, the number of parts is small, the structure is simple, and the cost is low.
In one of the above-described camshaft structures, the area of the cam projection has a receiving hole provided concavely, and the outer end of the elastic member is fitted in the receiving hole. The accommodating hole is positioned at the position and has enough space, the space inside the cam is reasonably utilized, and meanwhile, the accommodating hole provides installation space for the elastic part, so that the elastic part can be positioned between the cam and the shaft, the external space cannot be occupied, and the camshaft is compact in structure.
In the above camshaft structure, the bottom of the receiving hole has a fixing hole which is recessed, the receiving hole and the fixing hole are coaxially arranged, the inner diameter of the fixing hole is smaller than that of the receiving hole, and the outer end of the elastic element is embedded and fixed in the fixing hole. The elastic part is fixedly connected with the cam, so that the stability of the camshaft structure is improved.
In the above camshaft structure, the locking hole has a step surface, the locking member is a locking pin having a positioning hole, the inner end of the elastic member is embedded in the positioning hole, and when the locking member abuts against the step surface under the action of the elastic force of the elastic member, the locking pin is partially positioned in the accommodating hole to position the cam and the shaft. The setting of step face plays spacing effect to the locking pin, and the setting of locating hole can improve the stability of elastic component to improve the stability of this camshaft structure.
In the above camshaft structure, the positioning hole is divided into an inner section and an outer section, the inner diameter of the inner section of the positioning hole is smaller than the inner diameter of the outer section of the positioning hole, the outer diameter of the elastic member is matched with the inner diameter of the inner section of the positioning hole, and the inner end of the elastic member is embedded into the inner section of the positioning hole so that the elastic member is in interference fit with the locking pin. The elastic part is fixedly connected with the locking pin, so that the stability of the camshaft structure is improved.
As another aspect, in the above camshaft structure, the locking hole has a step surface, the locking member is a solid locking pin, the inner end of the elastic member is fixedly connected to the locking pin, and when the locking pin abuts against the step surface under the elastic force of the elastic member, the locking pin is partially located in the receiving hole to position the cam and the shaft.
In the above-mentioned camshaft structure, the outer side wall of the shaft has a pair of protruding annular ribs, and the guide groove is located between the pair of annular ribs. The processing is convenient.
In the above camshaft structure, the oil passage is arranged along the axial direction of the shaft, the oil passage is a blind hole, and the locking hole is communicated with the inner end of the oil passage.
In the above-described camshaft structure, the elastic member is a cylindrical spring made of a metal material or the elastic member is a rubber spring.
Compared with the prior art, the utility model provides a pair of camshaft structure has following advantage:
1. the locking structure is arranged in the camshaft structure, so that the cam and the shaft can be locked and unlocked, the cylinder deactivation function of the engine is realized, energy conservation and emission reduction are realized, and the fuel economy is improved.
2. The locking structure is arranged in the camshaft structure, the structure is compact, the external installation space is not occupied, and the installation positions of other parts in the automobile can not be changed.
3. The camshaft structure has the advantages of few parts, simple structure, low cost and good stability.
Drawings
Fig. 1 is a sectional view of the present camshaft structure when locked.
Fig. 2 is a sectional view of the camshaft structure when unlocked.
Fig. 3 is an overall structural schematic diagram of the present camshaft structure.
Fig. 4 is a schematic structural view of the shaft and the guide groove of the present camshaft structure.
Fig. 5 is a structural schematic view of the shaft interior of the present camshaft structure.
In the figure, 1, axis; 11. an oil passage; 12. a guide groove; 13. a locking hole; 14. a step surface; 15. an annular rib; 2. a cam; 21. a projection; 22. an accommodation hole; 23. a fixing hole; 3. an elastic member; 4. a locking member; 41. and (7) positioning the holes.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
Example one
As shown in fig. 1, 2, and 3, the camshaft structure includes a shaft 1, a cam 2, an elastic member 3, and a lock member 4.
As shown in fig. 4 and 5, the outer side wall of the shaft 1 has a pair of protruding annular ribs 15, and the guide groove 12 is located between the pair of protruding annular ribs 15, i.e. the guide groove 12 is disposed on the outer side wall of the shaft 1 in an annular concave manner. Along the axial of axle 1, be provided with logical oil passageway 11 in the axle 1, logical oil passageway 11 is the blind hole, leads to oil passageway 11 and guide way 12 and passes through locking hole 13 and be linked together, and locking hole 13 is linked together with the inner of logical oil passageway 11.
In this embodiment, the elastic member 3 is a cylindrical spring made of a metal material, and in actual production, the elastic member 3 is a rubber spring. The area of the convex part 21 of the cam 2 is provided with a concave accommodating hole 22, the bottom of the accommodating hole 22 is provided with a concave fixing hole 23, the accommodating hole 22 and the fixing hole 23 are coaxially arranged, the inner diameter of the fixing hole 23 is smaller than that of the accommodating hole 22, and the outer end part of the elastic element 3 is embedded and fixed in the fixing hole 23. The locking hole 13 is provided with a step surface 14, the locking piece 4 is a locking pin with a positioning hole 41, the positioning hole 41 is divided into an inner section and an outer section, the inner diameter of the inner section of the positioning hole 41 is smaller than the inner diameter of the outer section of the positioning hole 41, the outer diameter of the elastic piece 3 is matched with the inner diameter of the inner section of the positioning hole 41, the inner end of the elastic piece 3 is embedded into the inner section of the positioning hole 41, and the elastic piece 3 is in interference fit with the locking pin. The cam 2, the elastic member 3 and the locking pin are integrated into a single body.
The locking pin is always located between the two annular ribs 15 and can move along the guide groove 12. As shown in fig. 1, under the elastic force of the elastic member 3, the locking pin is inserted into the locking hole 13 and abuts against the step surface 14, part of the locking pin is positioned in the accommodating hole 22 to position the cam 2 and the shaft 1, at the moment, the cam 2 and the shaft 1 are locked, the rotation of the cam 2 can drive the shaft 1 to rotate together, and the cam 2 can open and close the valve. As shown in fig. 2, engine oil is introduced into the oil passage 11, the engine oil enters the locking hole 13 and pushes the locking pin open by overcoming the elastic force of the elastic element 3, so that the locking pin is integrally separated from the locking hole 13, the locking pin is located in the guide groove 12 between the two annular convex strips 15, the locking pin can move along the guide groove 12, at the moment, the cam 2 and the shaft 1 are unlocked and are not clamped with each other, the shaft 1 cannot drive the cam 2 to rotate, the cam 2 cannot open and close the valve, and the cylinder deactivation function is realized.
Example two
The structure and principle of this embodiment are substantially the same as those of the first embodiment, except that in this embodiment, the locking hole 13 has a step surface 14, the locking member 4 is a solid locking pin, the inner end of the elastic member 3 is fixedly connected to the locking pin, and when the locking pin abuts against the step surface 14 under the action of the elastic force of the elastic member 3, the locking pin is partially located in the receiving hole 22 to position the cam 2 and the shaft 1.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the terms of the shaft 1, the oil passage 11, the guide groove 12, the lock hole 13, the stepped surface 14, the annular protrusion 15, the cam 2, the projection 21, the receiving hole 22, the fixing hole 23, the elastic member 3, the lock member 4, the positioning hole 41, and the like are used more frequently herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (9)
1. The utility model provides a camshaft structure, includes axle (1) and cover and establishes cam (2) outside axle (1), its characterized in that still includes elastic component (3) and locking piece (4), logical oil passageway (11) has in axle (1), have on the lateral wall of axle (1) and be annular recessed guide way (12), it is linked together through locking hole (13) to lead to oil passageway (11) and guide way (12), the outer end embedding of elastic component (3) sets up in cam (2), the inner of elastic component (3) links to each other with locking piece (4), and under the effect of elastic component (3) elasticity, locking piece (4) can be embedded into and make cam (2) and axle (1) fix a position mutually in locking hole (13).
2. A camshaft arrangement as claimed in claim 1, characterized in that the region of the projection (21) of the cam (2) has a receiving bore (22) arranged concavely, the outer end of the spring element (3) being arranged flush in the receiving bore (22).
3. A camshaft structure as claimed in claim 2, characterized in that the receiving bore (22) has a concavely arranged fixing bore (23) at its bottom, the receiving bore (22) and the fixing bore (23) being arranged coaxially, the fixing bore (23) having a smaller inner diameter than the receiving bore (22), the outer end of the spring element (3) being fixed in the fixing bore (23) in an embedded manner.
4. A camshaft structure as claimed in claim 2 or 3, wherein the locking hole (13) has a step surface (14), the locking member (4) is a locking pin having a positioning hole (41), the inner end of the elastic member (3) is embedded in the positioning hole (41), and the locking pin is partially located in the receiving hole (22) to position the cam (2) and the shaft (1) when the locking member (4) abuts against the step surface (14) by the elastic force of the elastic member (3).
5. A camshaft structure as claimed in claim 4, characterized in that the positioning hole (41) is divided into an inner section and an outer section, the inner diameter of the positioning hole (41) is smaller than the inner diameter of the outer section of the positioning hole (41), the outer diameter of the elastic member (3) matches the inner diameter of the positioning hole (41), and the inner end of the elastic member (3) is inserted into the inner section of the positioning hole (41) to make the elastic member (3) and the locking pin interference fit.
6. A camshaft arrangement as claimed in claim 2 or 3, characterized in that the locking bore (13) has a step surface (14), the locking element (4) is a solid locking pin, the inner end of the spring element (3) is fixedly connected to the locking pin, and the locking pin is partially located in the receiving bore (22) when the locking pin abuts against the step surface (14) under the influence of the spring force of the spring element (3) to position the cam (2) and the shaft (1).
7. A camshaft structure as claimed in claim 1, 2 or 3, wherein the shaft (1) has a pair of projecting annular ribs (15) on its outer side wall, and the guide groove (12) is located between the pair of annular ribs (15).
8. A camshaft arrangement as claimed in claim 1, 2 or 3, characterized in that the oil through channel (11) is arranged in the axial direction of the shaft (1), the oil through channel (11) being a blind hole, and the locking hole (13) communicating with the inner end of the oil through channel (11).
9. A camshaft structure as claimed in claim 1, 2 or 3, characterized in that the elastic member (3) is a cylindrical spring made of a metal material or the elastic member (3) is a rubber spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020181650.1U CN211598773U (en) | 2020-02-18 | 2020-02-18 | Camshaft structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020181650.1U CN211598773U (en) | 2020-02-18 | 2020-02-18 | Camshaft structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211598773U true CN211598773U (en) | 2020-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020181650.1U Active CN211598773U (en) | 2020-02-18 | 2020-02-18 | Camshaft structure |
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| Country | Link |
|---|---|
| CN (1) | CN211598773U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282882A (en) * | 2020-11-30 | 2021-01-29 | 一汽解放汽车有限公司 | Camshaft assembly for controlling engine cylinder valve and vehicle |
-
2020
- 2020-02-18 CN CN202020181650.1U patent/CN211598773U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282882A (en) * | 2020-11-30 | 2021-01-29 | 一汽解放汽车有限公司 | Camshaft assembly for controlling engine cylinder valve and vehicle |
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