CN217950484U - Actuator and hydraulic fully-variable valve mechanism - Google Patents
Actuator and hydraulic fully-variable valve mechanism Download PDFInfo
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- CN217950484U CN217950484U CN202222114980.0U CN202222114980U CN217950484U CN 217950484 U CN217950484 U CN 217950484U CN 202222114980 U CN202222114980 U CN 202222114980U CN 217950484 U CN217950484 U CN 217950484U
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Abstract
The utility model discloses a executor and hydraulic pressure full variable valve mechanism relates to engine technical field, has solved the problem that current executor clearance compensation mechanism structure is complicated, has made things convenient for the installation to use, and concrete scheme is as follows: including installing hydraulic piston, piston cover and the check valve in variable valve housing mounting hole, hydraulic piston slides and sets up in the piston cover, and the check valve is fixed to be set up on the top of piston cover and with high-low pressure oil circuit intercommunication, hydraulic piston's below is equipped with the valve bridge, can dismantle on the valve bridge and be equipped with adjusting screw, adjusting screw is located hydraulic piston under, is equipped with the adjustment gasket that is used for adjusting hydraulic piston top clearance between adjusting screw and the valve bridge, hydraulic piston's bottom is spherical surface structure.
Description
Technical Field
The utility model belongs to the technical field of the engine technique and specifically relates to an executor and hydraulic pressure fully variable valve mechanism.
Background
The variable valve mechanism can be roughly classified into the following types according to its technical route: the variable valve mechanism is of an electromechanical type, an electrohydraulic type, a pneumatic type and an electromagnetic type, wherein the electrohydraulic type and the pneumatic type variable valve mechanism are popular due to the characteristics of simple integral structure and high variable freedom degree.
The inventor finds that an actuator of a hydraulic variable valve mechanism comprises functional structures such as clearance compensation and seating buffer, and as shown in fig. 1, most of clearance compensation mechanisms for clearance compensation of the existing actuators are composed of a steel ball 5, a valve body spring 7, a spring seat 8 and a piston head spring 9, so that the overall structure is complex, and the installation, the use and the subsequent maintenance are inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a not enough to prior art existence, the utility model aims at providing a executor and hydraulic pressure fully variable valve mechanism has cancelled traditional clearance compensation mechanism's setting, has set up removable adjusting screw and adjusting shim on the valve bridge, utilizes adjusting screw and adjusting shim to adjust hydraulic piston's top clearance, has solved the problem that current executor clearance compensation mechanism structure is complicated.
In order to achieve the above purpose, the present invention is realized by the following technical solution:
in a first aspect, the embodiment of the utility model provides an executor, including installing hydraulic piston, piston bush and the check valve in variable valve casing mounting hole, hydraulic piston slides and sets up in the piston bush, the fixed setting of check valve on the top of piston bush and with high-low pressure oil circuit intercommunication, hydraulic piston's below is equipped with the valve bridge, can dismantle on the valve bridge and be equipped with adjusting screw, adjusting screw is located hydraulic piston under, is equipped with the adjusting shim who is used for adjusting hydraulic piston top clearance between adjusting screw and the valve bridge, hydraulic piston's bottom is spherical structure.
As a further implementation mode, a plurality of side wall oil holes are formed in the side wall of the top end of the piston sleeve at intervals along the circumferential direction of the piston sleeve.
As a further implementation, a steel wire retaining ring is arranged between the hydraulic piston and the piston sleeve, and the steel wire retaining ring is arranged in the piston sleeve and close to the bottom end of the piston sleeve.
As a further implementation mode, the hydraulic piston is composed of a large head section and a small head section which are coaxially arranged, the large head section is fixedly connected with the small head section, the joint of the small head section and the large head section is in transition connection, the outer diameter of the large head section is larger than that of the small head section, the large head section is close to the one-way valve, and the small head section penetrates through the steel wire check ring and extends out of the bottom end of the piston sleeve.
As a further implementation, the outer diameter of the small head section is smaller than the inner diameter of the wire retainer ring.
As a further implementation manner, the hydraulic piston is composed of a hydraulic piston body and a hydraulic piston seat which are coaxially arranged, the hydraulic piston body is of a hollow structure, and an opening communicated with the inside is formed in the bottom end of the hydraulic piston body; the hydraulic piston seat is in interference fit with the opening.
As a further implementation manner, the hydraulic piston seat is composed of a circular base and a circular boss which are coaxially arranged, the circular base is fixedly connected with the circular boss, and the circular boss is inserted into the hydraulic piston body.
As a further implementation mode, the adjusting gasket is provided with a groove matched with the adjusting screw, and the adjusting screw and the hydraulic piston are coaxially arranged.
As a further implementation mode, a valve return spring is arranged below the valve bridge.
In a second aspect, another embodiment of the present invention provides a hydraulic fully variable valve train, which uses the actuator according to the first aspect.
Above-mentioned the utility model has the advantages as follows:
1) The utility model discloses traditional clearance compensation mechanism's setting has been cancelled to set up removable adjusting screw and adjusting shim on the valve bridge, utilized adjusting screw and adjusting shim to adjust hydraulic piston's top clearance, overall structure is simple, the installation and use of being convenient for, hydraulic piston's bottom sets up into spherical surface structure, when hydraulic piston displacement in-process appears deflecting, can guarantee hydraulic piston bottom and adjusting screw's effective contact under spherical surface structure's supplementary.
2) The utility model discloses the inside cavity and the bottom of hydraulic piston body are equipped with the opening with inside intercommunication, and hydraulic piston seat and hydraulic piston body interference fit adopt the mode of split type cavity design, greatly reduced hydraulic piston's whole quality.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to constitute a limitation on the invention.
Fig. 1 is a schematic view of the overall structure of a conventional actuator mentioned in the background art;
fig. 2 is a schematic diagram of an overall structure of an actuator according to one or more embodiments of the present invention;
fig. 3 is a schematic diagram of a hydraulic piston according to one or more embodiments of the present invention;
fig. 4 is a schematic cross-sectional view of a hydraulic piston according to one or more embodiments of the present disclosure;
FIG. 5 is a schematic diagram of a shim according to one or more embodiments of the present disclosure;
in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;
wherein, 1, a hydraulic piston; 2. a piston sleeve; 3. a one-way valve; 4. a variable valve housing; 5. a steel ball; 6. a valve bridge; 7. a valve body spring; 8. a spring seat; 9. a piston head spring; 10. an air valve; 11. a steel wire retainer ring; 12. adjusting the screw; 13. adjusting the gasket; 14. a gap; 15. a hydraulic piston body; 16. a hydraulic piston seat.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Just as the background art introduces, the clearance compensation mechanism that current executor is used for clearance compensation comprises steel ball 5, valve body spring 7, spring holder 8 and piston head spring 9 mostly, and overall structure is complicated, the problem of being not convenient for install and use and follow-up maintenance, for solving above-mentioned problem, the utility model provides a full variable valve mechanism of executor and hydraulic pressure.
Example 1
The utility model discloses an among the typical embodiment, as shown in fig. 2-5, an executor is proposed, include, hydraulic piston 1, piston cover 2, check valve 3, hydraulic piston 1, piston cover 2 and check valve 3 are all installed in variable valve housing 4 mounting hole, and wherein, hydraulic piston 1 slides and sets up in piston cover 2, and the fixed high-low pressure oil circuit intercommunication that sets up on the top of piston cover 2 and in the variable valve housing 4 of check valve 3.
A plurality of side wall oil holes are formed in the side wall of the top end of the piston sleeve 2 at intervals along the circumferential direction of the piston sleeve, the side wall oil holes are mainly used for discharging hydraulic oil, and in the valve seating process, the hydraulic piston 1, the piston sleeve 2 and the one-way valve 3 act together to achieve buffering seating.
As shown in fig. 3, hydraulic piston 1 is variable cross-section structure, divide into big head and little head, wherein, big head and little head are coaxial to be set up and integrated into one piece, the external diameter of big head is greater than the external diameter of little head, hydraulic piston 1's big head is close to in check valve 3, little head can pass and stretch out from the bottom of piston bush 2 from the intermediate position of steel wire retaining ring 11, but the junction joint of little head and big head can joint on steel wire retaining ring 11 to prevent hydraulic piston 1 roll-off piston bush 2.
The outer diameter of the small head section is smaller than the inner diameter of the steel wire retainer ring 11, the joint of the small head section and the large head section is in transition connection, specifically, the bottom end of the large head section is provided with an angle inclined towards the axis along the annular direction of the bottom end of the large head section to form a transition section, and the top end of the small head section is fixedly connected with the transition section.
As shown in fig. 4, the hydraulic piston 1 is a split hollow structure, the hydraulic piston 1 is composed of a hydraulic piston body 15 and a hydraulic piston seat 16, the hydraulic piston body 15 and the hydraulic piston seat 16 are coaxially arranged, and the two are fixedly connected through an interference fit installation mode.
Specifically, the hydraulic piston body 15 is a hollow structure, and the bottom end of the hydraulic piston body 15 is provided with an opening communicated with the hollow structure inside; the hydraulic piston seat 16 comprises a circular base and a circular boss, wherein the circular base and the circular boss are coaxially arranged and integrally formed, the diameter of the circular boss is slightly larger than the inner diameter of the hydraulic piston body 15, the diameter of the circular base is the same as the outer diameter of the hydraulic piston body 15, the hydraulic piston 1 adopts a split type hollow design mode, and the overall quality of the hydraulic piston 1 is greatly reduced.
The bottom end of the hydraulic piston 1 is connected with the valve bridge 6 through an adjusting screw 12, specifically, the adjusting screw 12 is fixedly arranged on the valve bridge 6 in a threaded connection mode, and an adjusting gasket 13 is arranged between the adjusting screw 12 and the valve bridge 6.
The adjusting shim 13 can cooperate with the adjusting screw 12 to adjust the top clearance of the hydraulic piston 1, i.e. the clearance 14 between the top end of the hydraulic piston 1 and the top end of the piston sleeve 2, wherein the adjusting screw 12 can fix the position of the adjusting shim 13, and the adjusting shim 13 can prevent the adjusting screw 12 from being damaged by friction with the valve bridge 6.
As shown in fig. 5, the adjusting shim 13 is provided with a groove which is matched with the adjusting screw 12, and the installation of the adjusting shim 13 is greatly facilitated due to the arrangement of the groove.
It is understood that the thickness of the adjustment pad 13 can be selected and replaced according to actual requirements in practical application, and the specific thickness is not limited too much here.
The adjusting screw 12 and the hydraulic piston 1 are coaxially arranged, and the diameter of the nut of the adjusting screw 12 is not smaller than the outer diameter of the small end section of the hydraulic piston 1, so that the bottom end of the hydraulic piston 1 is ensured to be effectively contacted with the adjusting screw 12.
A valve return spring (not shown in the figure) is further arranged below the valve bridge 6 and is mainly used for returning the valve bridge 6, specifically, when the hydraulic piston 1 moves downwards, the valve bridge 6 is driven to move downwards through the adjusting screw 12, so that the valve 10 is opened, and meanwhile, under the action of hydraulic oil, the hydraulic piston 1 is always in contact with the adjusting screw 12 on the valve bridge 6, so that the function of eliminating the clearance is achieved, and the impact noise of the traditional valve mechanism is well eliminated;
when the hydraulic piston 1 moves upwards, the valve bridge 6 will move upwards and return under the action of the valve return spring below it, so that the valve 10 closes.
The bottom end of the hydraulic piston 1 is processed into a spherical structure, the radius is R, and when the hydraulic piston 1 deflects in the displacement process, the bottom end of the hydraulic piston 1 can be ensured to be effectively contacted with the adjusting screw 12 under the assistance of the spherical structure.
It is understood that the radius R of the spherical structure is selected according to the actual design requirement, and the specific limitation is not made herein.
Example 2
In another exemplary embodiment of the present invention, a hydraulic fully variable valve train is provided, which uses the actuator described in embodiment 1.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The actuator is characterized by comprising a hydraulic piston, a piston sleeve and a one-way valve, wherein the hydraulic piston, the piston sleeve and the one-way valve are installed in a variable valve shell installation hole, the hydraulic piston is arranged in the piston sleeve in a sliding mode, the one-way valve is fixedly arranged at the top end of the piston sleeve and communicated with a high-low pressure oil way, a valve bridge is arranged below the hydraulic piston, an adjusting screw is detachably arranged on the valve bridge and located under the hydraulic piston, an adjusting gasket used for adjusting the top clearance of the hydraulic piston is arranged between the adjusting screw and the valve bridge, and the bottom end of the hydraulic piston is of a spherical structure.
2. The actuator of claim 1, wherein the top side wall of the piston sleeve is provided with a plurality of side wall oil holes at intervals along the circumferential direction thereof.
3. The actuator of claim 1, wherein a wire retainer is disposed between the hydraulic piston and the piston sleeve, the wire retainer being defined within the piston sleeve and adjacent to the bottom end of the piston sleeve.
4. The actuator according to claim 3, wherein the hydraulic piston is composed of a large head section and a small head section which are coaxially arranged, the large head section is fixedly connected with the small head section, the connection part of the small head section and the large head section is in transition connection, the outer diameter of the large head section is larger than that of the small head section, the large head section is close to the one-way valve, and the small head section penetrates through the steel wire retainer ring and extends out of the bottom end of the piston sleeve.
5. The actuator of claim 4, wherein the outer diameter of the small head section is smaller than the inner diameter of the wire retaining ring.
6. The actuator according to claim 1, wherein the hydraulic piston is composed of a hydraulic piston body and a hydraulic piston seat which are coaxially arranged, the hydraulic piston body is of a hollow structure, and the bottom end of the hydraulic piston body is provided with an opening communicated with the inside; the hydraulic piston seat is in interference fit with the opening.
7. The actuator according to claim 6, wherein the hydraulic piston seat is composed of a circular base and a circular boss which are coaxially arranged, the circular base is fixedly connected with the circular boss, and the circular boss is inserted into the hydraulic piston body.
8. The actuator of claim 1, wherein the adjustment washer has a recess for receiving an adjustment screw, the adjustment screw being coaxial with the hydraulic piston.
9. The actuator according to claim 1, wherein a valve return spring is arranged below the valve bridge.
10. A hydraulic fully variable valve mechanism, characterized in that an actuator according to any one of claims 1-9 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222114980.0U CN217950484U (en) | 2022-08-11 | 2022-08-11 | Actuator and hydraulic fully-variable valve mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222114980.0U CN217950484U (en) | 2022-08-11 | 2022-08-11 | Actuator and hydraulic fully-variable valve mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217950484U true CN217950484U (en) | 2022-12-02 |
Family
ID=84226409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222114980.0U Active CN217950484U (en) | 2022-08-11 | 2022-08-11 | Actuator and hydraulic fully-variable valve mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217950484U (en) |
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2022
- 2022-08-11 CN CN202222114980.0U patent/CN217950484U/en active Active
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