阅读说明：本技术 一种横置柱塞式可变高度的气门桥总成 (Horizontal plunger type variable-height valve bridge assembly ) 是由 吴囿霖 张芳 万虎 范雨 李庆华 于 2020-04-24 设计创作，主要内容包括：本发明公开了一种横置柱塞式可变高度气门桥总成,设置在摇臂和气门之间,所述摇臂中部设有摇臂轴,所述摇臂的一端设有摇臂滚子,所述摇臂的另一端设有调整螺栓,所述摇臂滚子与凸轮靠接,其还包括气门桥,所述气门桥上套接有活塞,所述活塞与调整螺栓靠接,所述气门桥上设有气门槽,所述气门一端设置在气门槽内；所述气门桥上设有竖向活塞缸和横向柱塞缸,所述活塞设置在竖向活塞缸内,所述活塞与竖向活塞缸之间设有活塞弹簧,所述活塞一端还设有活塞杆,所述活塞弹簧套接在活塞杆上,所述竖向活塞缸底部设有活塞通孔。(The invention discloses a transverse plunger type variable-height valve bridge assembly which is arranged between a rocker arm and a valve, wherein a rocker arm shaft is arranged in the middle of the rocker arm, a rocker arm roller is arranged at one end of the rocker arm, an adjusting bolt is arranged at the other end of the rocker arm, the rocker arm roller is abutted with a cam, the transverse plunger type variable-height valve bridge assembly also comprises a valve bridge, a piston is sleeved on the valve bridge and abutted with the adjusting bolt, a valve groove is formed in the valve bridge, and one end of the valve is arranged in the valve groove; the air valve bridge is provided with a vertical piston cylinder and a transverse plunger cylinder, the piston is arranged in the vertical piston cylinder, a piston spring is arranged between the piston and the vertical piston cylinder, one end of the piston is further provided with a piston rod, the piston spring is sleeved on the piston rod, and the bottom of the vertical piston cylinder is provided with a piston through hole.)

1. The utility model provides a variable high valve bridge assembly of horizontal plunger type, sets up between rocking arm (1) and valve (2), rocking arm (1) middle part is equipped with rocking arm axle (1.1), the one end of rocking arm (1) is equipped with rocking arm roller (3), the other end of rocking arm (1) is equipped with adjusting bolt (4), rocking arm roller (3) and cam (5) hug closely, its characterized in that:

the valve bridge (6) is sleeved with a piston (7), the piston (7) is abutted to the adjusting bolt (4), a valve groove (6.1) is formed in the valve bridge (6), and one end of the valve (2) is arranged in the valve groove (6.1);

a vertical piston cylinder (6.2) and a transverse plunger cylinder (6.3) are arranged on the valve bridge (6), the piston (7) is arranged in the vertical piston cylinder (6.2), a piston spring (7.1) is arranged between the piston (7) and the vertical piston cylinder (6.2), a piston rod (7.2) is further arranged at one end of the piston (7), the piston spring (7.1) is sleeved on the piston rod (7.2), and a piston through hole (6.4) is formed in the bottom of the vertical piston cylinder (6.2);

the horizontal plunger cylinder (6.3) is arranged at the bottom of the vertical piston cylinder (6.2), a plunger (8) and a plug (9) are arranged in the horizontal plunger cylinder (6.3), a plunger spring (8.1) is arranged between the plunger (8) and the plug (9), the piston through hole (6.4) is arranged in the radial direction of the plunger (8), a piston groove (8.2) and a piston hole (8.3) are arranged on the plunger (8), the piston groove (8.2) is opposite to the piston rod (7.2), and the piston hole (8.3) and the piston through hole (6.4) are in the same direction;

a rocker shaft control oil duct (1.1a) is arranged on the rocker shaft (1.1), a rocker arm oil duct (1a) is arranged in the rocker arm (1), an adjusting bolt oil duct (4a) is arranged in the adjusting bolt (4), a piston oil duct (7a) and a piston valve bridge connecting oil duct (7b) are arranged in the piston (7), a valve bridge oil duct (6a) is arranged in the valve bridge (6), a plunger oil cavity (6.3a) is arranged in the transverse plunger cylinder (6.3),

the rocker arm shaft control oil duct (1.1a) is communicated with the plunger oil chamber (6.3a) sequentially through the rocker arm oil duct (1a), the adjusting bolt oil duct (4a), the piston oil duct (7a), the piston valve bridge connecting oil duct (7b) and the valve bridge oil duct (6 a);

the plunger (8) is arranged between the plunger oil chamber (6.3a) and the plug (9),

an annular groove passage (6.2a) is formed between the valve bridge oil passage (6a) and the inner wall of the vertical piston cylinder (6.2), and the piston valve bridge connecting oil passage (7b) is communicated with the annular groove passage (6.2a) all the time when the piston (7) moves axially.

2. The transverse plunger type variable height valve bridge assembly of claim 1, wherein: one end of the piston (7) is provided with a elephant foot (10), the adjusting bolt (4) is arranged in the elephant foot (10), an elephant foot oil passage (10a) is arranged in the elephant foot (10), and the adjusting bolt oil passage (4a) is communicated with the piston oil passage (7a) through the elephant foot oil passage (10 a).

3. The transverse plunger type variable height valve bridge assembly of claim 2, wherein: the opening part of the vertical piston cylinder (6.2) is provided with a check ring (6.2.1), and the piston (7) is arranged in the check ring (6.2.1).

4. The transverse plunger type variable height valve bridge assembly of claim 3, wherein: and one end of the piston (7) is provided with a piston spring sleeve (7.3), and one end of the piston spring (7.1) is arranged in the piston spring sleeve (7.3).

5. The transverse plunger type variable height valve bridge assembly according to any one of claims 1 to 4, wherein: plunger (8) one end is equipped with plunger spring housing (8.4), plunger spring (8.1) one end sets up in plunger spring housing (8.4).

6. The transverse plunger type variable height valve bridge assembly of claim 5, wherein: and a plunger limiting table (6.3.1) is arranged on the plunger oil cavity (6.3a), and the plunger (8) is abutted against the plunger limiting table (6.3.1).

7. The transverse plunger type variable height valve bridge assembly of claim 6, wherein: the valve bridge (6) is provided with a plurality of valve grooves (6.1), each valve groove (6.1) is provided with a valve (2), and the vertical piston cylinder (6.2) is arranged at the center of each valve groove (6.1).

8. The transverse plunger type variable height valve bridge assembly of claim 7, wherein: the piston bore (8.3) is arranged in the piston groove (8.2).

9. The transverse plunger type variable height valve bridge assembly of claim 8, wherein: the piston through hole (6.4) radially penetrates through the transverse plunger cylinder (6.3).

10. The transverse plunger type variable height valve bridge assembly of claim 8, wherein: and an oil drainage hole (6.3.2) is formed in the transverse plunger cylinder (6.3).

Technical Field

The invention relates to the technical field of valve actuating mechanisms of vehicle engines, in particular to a transverse plunger type variable-height valve bridge assembly.

Background

The variable valve lift valve train can be generally realized by a variable cam, a variable rocker arm and the like. The variable cam and the variable rocker arm have complex structures, can be realized by changing the cam position or the force-bearing position of the rocker arm, and often needs a complex conversion mechanism and a servo motor for control. The existing valve bridge with variable height is generally changed and limited by steel balls, pins and the like.

The variable valve lift technology at the present stage is generally in modes of variable cam and variable rocker ratio and the like, and the variable valve lift technology is very complex in mechanism, high in cost and low in matching degree. The existing valve bridge with variable height generally changes and limits through steel balls, pins and the like, and has the disadvantages of small stress area of parts, large contact stress, easy abrasion, and poor reliability and durability.

Disclosure of Invention

The invention aims to provide a transverse plunger type variable-height valve bridge assembly, which changes the working height, the stress state and the stressed part of the valve bridge assembly by changing the relative positions of a piston and a plunger, realizes the motion loss of a cam mechanism, realizes the variable valve lift, and has the advantages of simple structure, small volume, light weight, good reliability and low cost.

In order to achieve the purpose, the invention designs a transverse plunger type variable-height valve bridge assembly which is arranged between a rocker arm and a valve, wherein the middle part of the rocker arm is provided with a rocker arm shaft, one end of the rocker arm is provided with a rocker arm roller, the other end of the rocker arm is provided with an adjusting bolt, the rocker arm roller is abutted with a cam, the transverse plunger type variable-height valve bridge assembly also comprises a valve bridge, a piston is sleeved on the valve bridge and abutted with the adjusting bolt, the valve bridge is provided with a valve groove, and one end of the valve is arranged in the valve groove; the valve bridge is provided with a vertical piston cylinder and a transverse plunger cylinder, the piston is arranged in the vertical piston cylinder, a piston spring is arranged between the piston and the vertical piston cylinder, one end of the piston is also provided with a piston rod, the piston spring is sleeved on the piston rod, and the bottom of the vertical piston cylinder is provided with a piston through hole; the transverse plunger cylinder is arranged at the bottom of the vertical piston cylinder, a plunger and a plug are arranged in the transverse plunger cylinder, a plunger spring is arranged between the plunger and the plug, the piston through hole is arranged in the radial direction of the plunger, the plunger is provided with a piston groove and a piston hole, the piston groove is opposite to the piston rod, and the directions of the piston hole and the piston through hole are the same; the rocker arm shaft is provided with a rocker arm shaft control oil duct, the rocker arm is internally provided with a rocker arm oil duct, the adjusting bolt is internally provided with an adjusting bolt oil duct, the piston is internally provided with a piston oil duct and a piston valve bridge connecting oil duct, the valve bridge is internally provided with a valve bridge oil duct, the transverse plunger cylinder is internally provided with a plunger oil cavity, and the rocker arm shaft control oil duct is communicated with the plunger oil cavity sequentially through the rocker arm oil duct, the adjusting bolt oil duct, the piston valve bridge connecting oil duct and the valve bridge oil; the plunger sets up between plunger oil pocket and jam, form the annular passageway between valve bridge oil duct and the vertical piston cylinder inner wall, piston valve bridge connection oil duct communicates with the annular passageway all the time when piston axial motion, and the piston outside is provided with the loop type passageway, can be when the piston rotates for piston valve bridge connection oil duct communicates with valve bridge oil duct through the annular passageway all the time.

Furthermore, one end of the piston is provided with a elephant foot, the adjusting bolt is arranged in the elephant foot, an elephant foot oil passage is arranged in the elephant foot, and the adjusting bolt oil passage is communicated with the piston oil passage through the elephant foot oil passage. Therefore, under the action of the piston spring, the top of the piston is always in close contact with the elephant foot, so that enough engine oil can enter the piston oil duct from the elephant foot oil duct, the engine oil is prevented from leaking, the sufficient engine oil pressure is maintained, and the plunger can be quickly pushed to translate in the blocking direction to switch the state.

Furthermore, a check ring is arranged at an opening of the vertical piston cylinder, and the piston is arranged in the check ring. In this way, in a free state, i.e. when the valve bridge assembly has not been fitted to the engine, the piston is prevented from ejecting from the piston chamber under the action of the piston spring, so that the valve bridge assembly remains integral.

Furthermore, one end of the piston is provided with a piston spring sleeve, and one end of the piston spring is arranged in the piston spring sleeve. Therefore, the axial limiting function of the piston spring sleeve can be used for ensuring that the piston spring cannot be combined in the working process, so that the service life of the piston spring is ensured.

Furthermore, one end of the plunger is provided with a plunger spring sleeve, and one end of the plunger spring is arranged in the plunger spring sleeve. Therefore, the axial limiting function of the plunger spring sleeve can be used for ensuring that the plunger spring cannot be in parallel rings in work so as to ensure the service life of the plunger spring.

Furthermore, a plunger limiting table is arranged on the plunger oil cavity, and the plunger is abutted against the plunger limiting table. Therefore, the plunger limiting table can limit the excessive movement of the plunger, and the purpose is to ensure that the relative position of the plunger and the piston rod is always within the designed reasonable range under the normal working state.

Furthermore, a plurality of valve grooves are formed in the valve bridge, valves are arranged in the valve grooves respectively, and the vertical piston cylinder is arranged in the centers of the valve grooves. The structure can ensure the balanced stress of the whole valve bridge and is more reasonable.

Preferably, the piston bore is arranged in a piston groove. Thus, when the height of the valve bridge needs to be reduced, the plunger moves in the transverse plunger cylinder for a minimum distance, so that the stability of the whole structure is improved.

Preferably, the piston through hole penetrates through the transverse plunger cylinder in the radial direction. Therefore, when the piston rod is long, the piston rod can penetrate through the piston through hole, and engine oil leaked to the middle part of the transverse plunger cylinder from the plunger oil cavity and the piston valve bridge connecting oil passage can be discharged from the piston through hole.

Preferably, an oil drainage hole is formed in the transverse plunger cylinder. Thus, the drain hole can be used to drain oil leaking from the plunger and air on the plunger-clogging side.

The invention has the advantages that:

1. by adjusting the variable height of the valve bridge to different values, the structure can be used for variable valve displacement devices of different engines, or high-power braking devices of the engines, or the integration of the variable valve displacement devices and the high-power braking devices;

2. compared with other similar actuating mechanisms, the structure is simple, the assembly is simple, and the reliability is good;

3. the valve bridge has good universality and is suitable for all engines with four-valve design.

Drawings

FIG. 1 is a schematic view of the mounting structure of the present invention;

FIG. 2 is a schematic view of the mounting structure of the present invention under another condition;

FIG. 3 is a schematic view of the internal structure of the valve bridge in a free state;

FIG. 4 is a schematic view of the internal structure of a valve bridge when the valve clearance is adjusted;

FIG. 5 is a schematic view of the internal structure of a valve bridge during valve height switching;

FIG. 6 is a schematic view showing the internal structure of a valve bridge according to embodiment 2;

FIG. 7 is a left side schematic view of FIG. 6;

fig. 8 is a schematic view of the internal structure of the transverse plunger cylinder of embodiment 2.

In the figure: the rocker arm comprises a rocker arm 1 (wherein, a rocker arm oil duct 1a, a rocker arm shaft 1.1 and a rocker arm shaft control oil duct 1.1a), a valve 2, a rocker arm roller 3, an adjusting bolt 4 (wherein, an adjusting bolt oil duct 4a), a cam 5, a valve bridge 6 (wherein, a valve bridge oil duct 6a, a valve groove 6.1, a vertical piston cylinder 6.2, a ring groove passage 6.2a, a retainer ring 6.2.1, a transverse plunger cylinder 6.3, a plunger oil chamber 6.3a, a plunger limit table 6.3.1, an oil drain hole 6.3.2, a piston through hole 6.4), a piston 7 (wherein, the piston oil duct 7a, a piston valve bridge connecting oil duct 7b, a piston spring 7.1, a piston rod 7.2 and a piston spring sleeve 7.3), a plunger 8 (wherein, the plunger spring 8.1, the piston groove 8.2, the piston hole 8.3 and the plunger spring sleeve 8.4), a plug 9 and a elephant foot 10 (wherein, the.

Detailed Description

The invention is described in further detail below with reference to the following figures and specific implementations: