CN213743562U - Rocker arm shaft assembly, valve mechanism and engine - Google Patents

Abstract

The utility model relates to the technical field of engines, in particular to a rocker shaft assembly, a valve actuating mechanism and an engine, wherein the rocker shaft assembly comprises an installation shaft body, a rocker shaft, a guide post and a slide block, and a rocker shaft groove, a guide groove and a slide groove are formed on the installation shaft body; the part of the rocker arm shaft is positioned in the rocker arm shaft groove, and the part of the rocker arm shaft positioned in the rocker arm shaft groove is provided with a guide hole; the guide post is arranged in the guide groove and penetrates through the guide hole, and the rocker arm shaft can slide in the rocker arm shaft groove along the guide post; the sliding block is arranged in the sliding groove in a sliding mode and provided with a locking position and an unlocking position, when the sliding block is located at the locking position, the rocker arm shaft is fixed, and when the sliding block is located at the unlocking position, the rocker arm shaft can slide along the guide post. The utility model provides a structure that can realize stopping the jar different from prior art has richened the mode that can realize stopping the jar, and implementation is simple and easy.

Description

Rocker arm shaft assembly, valve mechanism and engine

Technical Field

The utility model relates to the technical field of engines, especially, relate to a can realize rocking arm axle subassembly, valve timing mechanism and engine of cylinder deactivation function.

Background

Cylinder deactivation (Cylinder deactivation), also known as variable displacement technology, is a technology that when an engine runs under partial load, fuel supply, ignition and intake and exhaust of partial cylinders are cut off through related mechanisms, and the work is stopped, so that the load factor of the remaining working cylinders is increased, the efficiency is improved, and the fuel consumption is reduced. There are various types of cylinder deactivation systems in the prior art, such as cylinder deactivation by separately controlling the valve lift paths using connecting pins connecting two cams and two rocker arms, and cylinder deactivation with dual lifters, such as in engines with direct valve trains.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can realize rocking arm axle subassembly, valve timing mechanism and the engine of jar function of stopping to richen the means that can realize stopping the jar, and the implementation is simple and easy.

To achieve the purpose, the utility model adopts the following technical proposal:

a rocker shaft assembly comprising:

the mounting shaft body is provided with a rocker arm shaft groove, a guide groove which extends along a first direction and penetrates through the rocker arm shaft groove, and a sliding groove which extends along a second direction and is communicated with the rocker arm shaft groove;

the part of the rocker arm shaft is positioned in the rocker arm shaft groove, the part of the rocker arm shaft positioned outside the rocker arm shaft groove is used for being rotationally connected with the rocker arm, a guide hole penetrating along the first direction is formed in the part of the rocker arm shaft positioned in the rocker arm shaft groove, the first direction is vertical to the axial direction of the rocker arm shaft, and the second direction is parallel to the axial direction of the rocker arm shaft;

the guide post is arranged in the guide groove and penetrates through the guide hole, and the rocker arm shaft can slide along the guide post in the rocker arm shaft groove;

the sliding block is arranged in the sliding groove in a sliding mode and provided with a locking position and an unlocking position, when the sliding block is located at the locking position, the rocker arm shaft is fixed, and when the sliding block is located at the unlocking position, the rocker arm shaft can slide along the guide post.

Preferably, the slider is connected with a control plunger extending along the second direction, one side of the slider, which is far away from the rocker shaft, is abutted with a return spring, the mounting shaft body is provided with a control cavity extending along the second direction, the control plunger is slidably arranged in the control cavity, the control cavity is communicated with a control oil source, the control plunger can drive the slider to move towards the direction of compressing the return spring under the action of control oil so as to unlock the rocker shaft, and the return spring can drive the slider to return after the pressure of the control oil is released so as to lock the rocker shaft.

Preferably, a locking portion is connected to a side of the slider facing the rocker shaft, and the locking portion abuts against an upper end of the rocker shaft when the slider is located at the locking position.

Preferably, the locking surface of the locking part is an arc surface adapted to the shape of the rocker arm shaft.

Preferably, in the second direction, the length of the locking portion is equal to or approximately equal to the length of a portion of the rocker shaft located in the rocker shaft groove, and an avoidance groove for avoiding the guide post is formed in the locking portion.

Preferably, one side of the sliding block facing the return spring is connected with a limiting part, and the limiting part is used for limiting the distance of the sliding block moving towards the direction of compressing the return spring.

Preferably, the rocker shaft includes a sliding shaft portion and an installation shaft portion, the sliding shaft portion is located in the rocker shaft groove, the guide hole is opened in the sliding shaft portion, the installation shaft portion is located outside the rocker shaft groove, and the installation shaft portion is used for being connected with the rocker in a rotating mode.

A valve gear at least comprises a rocker arm and the rocker arm shaft assembly, wherein the rocker arm is rotatably connected with the part of the rocker arm shaft, which is positioned outside the groove of the rocker arm shaft.

Preferably, the valve actuating mechanism further comprises a return spring and a pressing plate, a pressing plate platform is arranged on the installation shaft body, the pressing plate is arranged on the pressing plate platform, and the return spring is connected between the pressing plate and the rocker arm.

An engine comprising a valve train according to any preceding claim.

The utility model has the advantages that:

the utility model provides a rocker shaft assembly, which comprises an installation shaft body, a rocker shaft, a guide post and a slide block, wherein the installation shaft body is provided with a rocker shaft groove, a guide groove which extends along a first direction and is communicated with the rocker shaft groove, and a slide groove which extends along a second direction and is communicated with the rocker shaft groove; the part of the rocker arm shaft is positioned in the rocker arm shaft groove, the part of the rocker arm shaft outside the rocker arm shaft groove is used for being rotationally connected with the rocker arm, a guide hole which is penetrated along a first direction is formed in the part of the rocker arm shaft which is positioned in the rocker arm shaft groove, the first direction is vertical to the axial direction of the rocker arm shaft, and the second direction is parallel to the axial direction of the rocker arm shaft; the guide post is arranged in the guide groove and penetrates through the guide hole, and the rocker arm shaft can slide in the rocker arm shaft groove along the guide post; the sliding block is arranged in the sliding groove in a sliding mode and provided with a locking position and an unlocking position, when the sliding block is located at the locking position, the rocker arm shaft is fixed, and when the sliding block is located at the unlocking position, the rocker arm shaft can slide along the guide post.

When the engine runs normally, the sliding block is positioned at the locking position, the rocker arm shaft is kept fixed, and the rocker arm can normally drive the valve to open and close; when the engine needs to stop the cylinder, the sliding block is located at the unlocking position, the freedom degree of the rocker arm shaft along the first direction is released, the rocker arm lift is offset by the movement of the rocker arm shaft along the guide post, and therefore the rocker arm cannot normally drive the valve to open and close, and the cylinder stopping function is achieved. The utility model provides a structure that can realize stopping the jar different from prior art has richened the mode that can realize stopping the jar, and implementation is simple and easy.

Drawings

Fig. 1 is a front sectional view of a rocker shaft assembly provided by the present invention with a rocker arm and a return spring installed;

FIG. 2 is a side view of the rocker shaft assembly provided by the present invention with the rocker arm and return spring installed;

fig. 3 is a side view of a mounting shaft body in accordance with the present invention;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;

fig. 5 is a plan view of a mounting shaft body according to the present invention;

fig. 6 is a schematic structural view of a rocker shaft according to the present invention;

fig. 7 is a schematic view of a first perspective of a slider in accordance with the present invention;

fig. 8 is a schematic diagram of a second view of the slider according to the present invention.

In the figure:

11. mounting a shaft body; 111. a rocker shaft slot; 112. a guide groove; 113. a sliding groove; 114. a control chamber; 115. avoiding the chute; 116. a platen platform;

12. a rocker shaft; 121. a sliding shaft portion; 1211. a guide hole; 122. a mounting shaft portion;

13. a guide post;

14. a slider; 141. a control plunger; 142. a locking portion; 1421. an avoidance groove; 1422. a locking surface; 143. a limiting part;

15. a return spring;

20. a rocker arm; 30. a return spring; 40. and (7) pressing a plate.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides a rocker arm shaft assembly, as shown in figure 1 and figure 2, comprising a mounting shaft body 11, a rocker arm shaft 12, a guide post 13 and a slide block 14; referring to fig. 3 and 4, the mounting shaft 11 has a rocker shaft groove 111, a guide groove 112 extending along a first direction and penetrating through the rocker shaft groove 111, and a sliding groove 113 extending along a second direction and communicating with the rocker shaft groove 111; referring to fig. 6, the rocker arm shaft 12 includes a sliding shaft portion 121 and a mounting shaft portion 122, the sliding shaft portion 121 is located in the rocker arm shaft groove 111, the mounting shaft portion 122 is located outside the rocker arm shaft groove 111, the mounting shaft portion 122 is used for being rotatably connected with the rocker arm 20, a guide hole 1211 penetrating along a first direction is formed in the sliding shaft portion 121, the first direction is perpendicular to the axial direction of the rocker arm shaft 12, and the second direction is parallel to the axial direction of the rocker arm shaft 12; the guide post 13 is mounted on the guide groove 112 and penetrates through the guide hole 1211, and the rocker arm shaft 12 can slide along the guide post 13 in the rocker arm shaft groove 111; the slider 14 is slidably disposed in the slide groove 113, the slider 14 has a lock position and an unlock position, the rocker shaft 12 is fixed when the slider 14 is in the lock position, and the rocker shaft 12 is slidable along the guide post 13 when the slider 14 is in the unlock position.

One end of the rocker arm 20 is in driving connection with the cam, the other end of the rocker arm 20 is in driving connection with the valve, and the cam can drive the rocker arm 20 to rotate around the rocker shaft 12 when rotating, so that the valve is driven to be opened and closed. When the engine runs normally, the sliding block 14 is positioned at the locking position, the rocker arm shaft 12 is kept fixed, and the rocker arm 20 can normally drive the valve to open and close; when the engine needs to be deactivated, the sliding block 14 is located at the unlocking position, the degree of freedom of the rocker arm shaft 12 in the first direction is released, the lift range of the rocker arm 20 is offset by the movement of the rocker arm shaft 12 along the guide post 13, and therefore the rocker arm 20 cannot normally drive the valve to be opened and closed, and the cylinder deactivation function is achieved. The utility model provides a structure that can realize stopping the jar different from prior art has richened the mode that can realize stopping the jar, and implementation is simple and easy.

Referring to fig. 7 and 8, a control plunger 141 extending in the second direction is connected to the slider 14, a return spring 15 is abutted to one side of the slider 14 away from the rocker arm shaft 12, a control cavity 114 extending in the second direction is formed in the mounting shaft 11, the control plunger 141 is slidably disposed in the control cavity 114, the control cavity 114 is communicated with a control oil source, the control plunger 141 can drive the slider 14 to move in a direction of compressing the return spring 15 under the action of the control oil to unlock the rocker arm shaft 12, and the return spring 15 can drive the slider 14 to return after the control oil is depressurized to lock the rocker arm shaft 12. In the present embodiment, referring to fig. 5, the control plunger 141 is located outside the sliding groove 113, the mounting shaft 11 is provided with the escape chute 115, the escape chute 115 communicates with the sliding groove 113, and the connecting portion between the slider 14 and the control plunger 141 is slidable in the escape chute 115. The slide 14 can be switched between the unlocked position and the locked position by controlling the filling and draining of the cavity 114.

With continued reference to fig. 7 and 8, the side of the slider 14 facing the rocker shaft 12 is connected with a locking portion 142, when the slider 14 is in the locked position, the locking portion 142 abuts against the upper end of the rocker shaft 12 to restrict the movement of the rocker shaft 12 along the guide post 13, and when the slider 14 is in the unlocked position, the locking portion 142 is displaced from the position of the rocker shaft 12 to release the restriction of the movement of the rocker shaft 12 along the guide post 13. By providing the locking portion 142, the rocker shaft 12 can be firmly fixed when the slider 14 is in the locked position. Preferably, the locking surface 1422 of the locking portion 142 is a cambered surface adapted to the shape of the rocker arm shaft 12 to increase the contact area therebetween, further improving the robustness of the rocker arm shaft 12 during locking. Preferably, the length of the locking part 142 is equal or approximately equal to the length of the portion of the rocker arm shaft 12 located in the rocker arm shaft groove 111 along the second direction, and the locking part 142 is opened with an escape groove 1421 for escaping the guide post 13. With this arrangement, the locking portion 142 can completely cover the portion of the rocker arm shaft 12 located in the rocker arm shaft groove 111 when the rocker arm shaft 12 is locked, and the firmness of the rocker arm shaft 12 when locked can be ensured.

With reference to fig. 7 and 8, a limiting portion 143 is connected to a side of the slider 14 facing the return spring 15, and the limiting portion 143 is used to limit a distance of the slider 14 moving in a direction of compressing the return spring 15.

The utility model also provides a valve gear, at least including rocking arm 20 and as above the rocking arm axle subassembly, rocking arm 20 with rocking arm axle 12 is located the outside part of rocking arm axle slot 111 is rotated and is connected, rocking arm 20 rotates with installation axial region 122 promptly and is connected.

The utility model also provides an engine, include as above the valve train.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A rocker shaft assembly, comprising:

the mounting shaft body (11) is provided with a rocker shaft groove (111), a guide groove (112) which extends along a first direction and penetrates through the rocker shaft groove (111), and a sliding groove (113) which extends along a second direction and is communicated with the rocker shaft groove (111);

the part of the rocker arm shaft (12) is positioned in the rocker arm shaft groove (111), the part of the rocker arm shaft (12) positioned outside the rocker arm shaft groove (111) is used for being rotatably connected with a rocker arm (20), a guide hole (1211) penetrating along the first direction is formed in the part of the rocker arm shaft (12) positioned in the rocker arm shaft groove (111), the first direction is perpendicular to the axial direction of the rocker arm shaft (12), and the second direction is parallel to the axial direction of the rocker arm shaft (12);

a guide post (13) attached to the guide groove (112) and penetrating through the guide hole (1211), the rocker arm shaft (12) being slidable along the guide post (13) in the rocker arm shaft groove (111);

the sliding block (14) is arranged in the sliding groove (113) in a sliding mode, the sliding block (14) is provided with a locking position and an unlocking position, the rocker arm shaft (12) is fixed when the sliding block (14) is located at the locking position, and the rocker arm shaft (12) can slide along the guide post (13) when the sliding block (14) is located at the unlocking position.

2. The rocker shaft assembly of claim 1, wherein a control plunger (141) extending in the second direction is connected to the slider (14), a return spring (15) is abutted to one side of the slider (14) away from the rocker shaft (12), a control cavity (114) extending in the second direction is formed in the mounting shaft body (11), the control plunger (141) is slidably disposed in the control cavity (114), the control cavity (114) is communicated with a control oil source, the control plunger (141) can drive the slider (14) to move in a direction of compressing the return spring (15) under the action of control oil to unlock the rocker shaft (12), and the return spring (15) can drive the slider (14) to return to lock the rocker shaft (12) after the pressure of the control oil is released.

3. The rocker shaft assembly of claim 2, wherein a latching portion (142) is connected to the side of the slider (14) facing the rocker shaft (12), the latching portion (142) abutting an upper end of the rocker shaft (12) when the slider (14) is in the latched position.

4. The rocker shaft assembly of claim 3, wherein the locking surface (1422) of the locking portion (142) is an arc surface that conforms to the shape of the rocker shaft (12).

5. The rocker shaft assembly of claim 3, wherein the length of the locking portion (142) is equal to or approximately equal to the length of the portion of the rocker shaft (12) located in the rocker shaft groove (111) in the second direction, and the locking portion (142) is provided with an escape groove (1421) for escaping the guide post (13).

6. The rocker shaft assembly of claim 2, in which a limit stop (143) is connected to the side of the slider (14) facing the return spring (15), the limit stop (143) being adapted to limit the distance of the slider (14) when it moves in the direction of compressing the return spring (15).

7. The rocker shaft assembly of any one of claims 1 to 6, wherein the rocker shaft (12) comprises a sliding shaft portion (121) and a mounting shaft portion (122), the sliding shaft portion (121) being located in the rocker shaft slot (111), the guide bore (1211) opening into the sliding shaft portion (121), the mounting shaft portion (122) being located outside the rocker shaft slot (111), the mounting shaft portion (122) being adapted for rotational connection to a rocker arm (20).

8. Valve train arrangement, comprising at least a rocker arm (20) and a rocker arm shaft assembly according to any of claims 1-7, the rocker arm (20) being in rotational connection with the part of the rocker arm shaft (12) that is located outside the rocker arm shaft groove (111).

9. The valve gear according to claim 8, further comprising a return spring (30) and a pressure plate (40), wherein a pressure plate platform (116) is disposed on the mounting shaft (11), the pressure plate (40) is disposed on the pressure plate platform (116), and the return spring (30) is connected between the pressure plate (40) and the rocker arm (20).

10. An engine comprising a valve train according to claim 8 or 9.

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