阅读说明：本技术 一种用于柴油发动机的配气机构的液压挺柱 (Hydraulic tappet for valve actuating mechanism of diesel engine ) 是由 向大成 冀金喜 裴学宏 张晓东 胡少辉 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种用于柴油发动机的配气机构的液压挺柱,涉及柴油发动机配气机构技术领域,柱塞固定压装设置在摇臂的内部,柱塞的下端固定安装有单向阀钢球,单向阀钢球的下端固定安装有单向阀弹簧,单向阀弹簧的外部固定套接有弹簧座,弹簧座的下端固定连接有挺柱弹簧,柱塞的外部固定连接有球头挺柱,球头挺柱的下端固定安装有球窝,柱塞的圆弧部固定开设有润滑油槽,摇臂的内部固定开设有进油孔,球头挺柱的顶部内侧固定开设有防脱槽,能够实现零间隙的初始装配状态,并且在运行中能够自动补偿磨损产生的间隙,减小发动机因配气机构产生的噪音,并且减少发动机装配成本和客户的维修维护成本,提高客户的业务运营效益。(The invention discloses a hydraulic tappet for a valve actuating mechanism of a diesel engine, which relates to the technical field of the valve actuating mechanism of the diesel engine, wherein a plunger is fixedly arranged inside a rocker arm in a press-fitting manner, a check valve steel ball is fixedly arranged at the lower end of the plunger, a check valve spring is fixedly arranged at the lower end of the check valve steel ball, a spring seat is fixedly sleeved outside the check valve spring, a tappet spring is fixedly connected at the lower end of the spring seat, a ball tappet is fixedly connected outside the plunger, a ball socket is fixedly arranged at the lower end of the ball tappet, a lubricating oil groove is fixedly arranged at the arc part of the plunger, an oil inlet hole is fixedly arranged inside the rocker arm, an anti-falling groove is fixedly arranged on the inner side of the top of the ball tappet, the initial assembly state of zero clearance can be realized, the clearance generated by abrasion can be automatically compensated in operation, the noise of the engine, and the service operation benefit of the client is improved.)

1. The utility model provides a hydraulic tappet for diesel engine's valve gear, includes plunger (1), its characterized in that: the plunger (1) is fixedly arranged inside the rocker arm (18) in a press-fitting mode, a check valve steel ball (4) is fixedly arranged at the lower end of the plunger (1), a check valve spring (6) is fixedly arranged at the lower end of the check valve steel ball (4), a spring seat (5) is fixedly sleeved outside the check valve spring (6), a tappet spring (7) is fixedly connected at the lower end of the spring seat (5), a ball tappet (2) is fixedly connected outside the plunger (1), a ball socket (8) is fixedly arranged at the lower end of the ball tappet (2), a lubricating oil groove (16) is fixedly formed in the arc part of the plunger (1), an oil inlet hole (19) is fixedly formed in the rocker arm (18), an anti-falling groove (11) is fixedly formed in the inner side of the top of the ball tappet (2), a tappet oil inlet (9) is fixedly formed in the position, on one side of the rocker arm (18), of the inner side of the top, a check valve oil inlet (10) is fixedly arranged in the plunger (1) and above the check valve steel ball (4), and a ball head (12) is fixedly connected to the bottom end of the ball head tappet (2).

2. The hydraulic tappet for a valve train of a diesel engine according to claim 1, wherein: the lubricating oil groove (16) is fixedly formed in the top end face and the side face of the plunger (1) together, and the lubricating oil groove (16) is a cross-shaped structural member.

3. The hydraulic tappet for a valve train of a diesel engine according to claim 1, wherein: a clamping type fixed connection structure is formed between the outer side of the bottom of the plunger (1) and the inner side of the top of the ball tappet (2) through a limiting clamp spring (3) and a limiting clamp spring mounting groove (17), and the limiting clamp spring mounting groove (17) is fixedly arranged on the inner side of the bottom of the plunger (1).

4. The hydraulic tappet for a valve train of a diesel engine according to claim 1, wherein: a gap between the ball head (12) and the ball socket (8) is set as a ball head and ball socket lubricating oil inlet (14), and a space between the spring seat (5) and the check valve spring (6) is set as a high-pressure cavity (13).

5. The hydraulic tappet for a valve train of a diesel engine according to claim 1, wherein: the bottom of the check valve steel ball (4) is arranged inside the top end of the check valve spring (6), and the minimum outer diameter of the spring seat (5) is larger than the maximum outer diameter of the check valve spring (6).

6. The hydraulic tappet for a valve train of a diesel engine according to claim 1, wherein: a ball socket slotted hole (15) is fixedly arranged at the geometric center position inside the bottom end of the ball socket (8).

Technical Field

The invention relates to the technical field of a valve actuating mechanism of a diesel engine, in particular to a hydraulic tappet of the valve actuating mechanism of the diesel engine.

Background

In the field of a valve actuating mechanism of a diesel engine, in the prior art, a rocker arm of the valve actuating mechanism adopts an adjusting bolt component for adjusting a valve clearance, the rocker arm is a traditional mechanical mode, in order to eliminate the influence of expansion caused by heat and contraction caused by cold, a specific valve clearance needs to be manually reserved in an initial state, the clearance brings noise generated during the operation of the engine, and the valve clearance needs to be adjusted again after the adjusting bolt component is abraded. The valve clearance adjustment in the initial state is an important process for the engine, and both the manual adjustment and the automatic assembly line automatic adjustment and manual detection modes generate great production cost. The engine is abraded and readjusted after running for a period of time, so that maintenance cost is required, operation time of business is wasted, and operation cost of customers is increased.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a hydraulic tappet of a valve actuating mechanism for a diesel engine, which solves the problems that in order to eliminate the influence of thermal expansion and cold contraction, a specific valve clearance needs to be manually reserved in an initial state, the clearance causes noise generated during the operation of the engine, and the valve clearance needs to be readjusted after an adjusting bolt assembly is abraded.

In order to achieve the purpose, the invention is realized by the following technical scheme: a hydraulic tappet for a valve actuating mechanism of a diesel engine comprises a plunger, wherein the plunger is fixedly arranged in a rocker in a press-fitting manner, a check valve steel ball is fixedly arranged at the lower end of the plunger, a check valve spring is fixedly arranged at the lower end of the check valve steel ball, a spring seat is fixedly sleeved outside the check valve spring, a tappet spring is fixedly connected at the lower end of the spring seat, a ball tappet is fixedly connected outside the plunger, a ball socket is fixedly arranged at the lower end of the ball tappet, a lubricating oil groove is fixedly formed in the arc part of the plunger, an oil inlet hole is fixedly formed in the rocker, an anti-falling groove is fixedly formed in the inner side of the top of the ball tappet, a tappet oil inlet is fixedly formed in the position, on one side of the rocker, of the inner side of the top of the plunger, and on the position above the check valve steel ball, the bottom end of the ball tappet is fixedly connected with a ball head.

Preferably, the top end face and the side face of the plunger are fixedly provided with a lubricating oil groove together, and the lubricating oil groove is a cross-shaped structural member.

Preferably, a clamping type fixed connection structure is formed between the outer side of the bottom of the plunger and the inner side of the top of the ball tappet through a limiting clamp spring and a limiting clamp spring mounting groove, and the limiting clamp spring mounting groove is fixedly arranged on the inner side of the bottom of the plunger.

Preferably, a gap between the ball and the ball socket is set as a ball socket lubricating oil inlet, and a space between the spring seat and the check valve spring is set as a high-pressure cavity.

Preferably, the bottom of the check valve steel ball is arranged inside the top end of the check valve spring, and the minimum outer diameter of the spring seat is larger than the maximum outer diameter of the check valve spring.

Preferably, a ball socket slotted hole is fixedly formed in the geometric center position inside the bottom end of the ball socket.

Advantageous effects

The invention provides a hydraulic tappet for a valve train of a diesel engine. Compared with the prior art, the method has the following beneficial effects:

the hydraulic tappet for the gas distribution mechanism of the diesel engine is characterized in that a plunger is fixedly arranged inside a rocker arm in a press-fitting manner, a check valve steel ball is fixedly arranged at the lower end of the plunger, a check valve spring is fixedly arranged at the lower end of the check valve steel ball, a spring seat is fixedly sleeved outside the check valve spring, a tappet spring is fixedly connected at the lower end of the spring seat, a ball head tappet is fixedly connected outside the plunger, a ball socket is fixedly arranged at the lower end of the ball head tappet, a lubricating oil groove is fixedly formed in the arc part of the plunger, an oil inlet hole is fixedly formed in the rocker arm, an anti-falling groove is fixedly formed in the inner side of the top of the ball head tappet, a tappet oil inlet is fixedly formed in the position, which is positioned at one side of the rocker arm, of the inner part of the plunger and positioned above the check valve steel ball, a check valve, and in operation, the clearance generated by abrasion can be automatically compensated, the noise of the engine caused by the valve mechanism is reduced, the assembly cost of the engine and the maintenance cost of a client are reduced, and the service operation benefit of the client is improved.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic view of the assembly structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the present invention;

FIG. 4 is a schematic view of the plunger of the present invention;

FIG. 5 is a schematic view of a connection structure of the limit clamp spring and the limit clamp spring mounting groove.

In the figure: 1. a plunger; 2. a ball tappet; 3. a limiting clamp spring; 4. a check valve steel ball; 5. a spring seat; 6. a check valve spring; 7. a tappet spring; 8. a ball socket; 9. an oil inlet of the tappet; 10. an oil inlet of the one-way valve; 11. a drop-proof groove; 12. a ball head; 13. a high pressure chamber; 14. a ball head and socket lubrication inlet; 15. a ball socket slot; 16. a lubricating oil groove; 17. a limiting clamp spring mounting groove; 18. a rocker arm; 19. an oil inlet hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a hydraulic tappet for a valve actuating mechanism of a diesel engine comprises a plunger 1, the plunger 1 is fixedly arranged inside a rocker 18 in a press-fitting mode, a check valve steel ball 4 is fixedly arranged at the lower end of the plunger 1, a check valve spring 6 is fixedly arranged at the lower end of the check valve steel ball 4, a spring seat 5 is fixedly sleeved outside the check valve spring 6, a tappet spring 7 is fixedly connected at the lower end of the spring seat 5, a ball tappet 2 is fixedly connected outside the plunger 1, a ball socket 8 is fixedly arranged at the lower end of the ball tappet 2, a lubricating oil groove 16 is fixedly arranged at the arc part of the plunger 1, an oil inlet hole 19 is fixedly arranged inside the rocker 18, an anti-falling groove 11 is fixedly arranged on the inner side of the top of the ball tappet 2, a tappet oil inlet 9 is fixedly arranged at the position, on one side of the rocker 18, of the inner side of the top of the plunger 1, a check valve 10 is fixedly, bottom fixedly connected with bulb 12 of bulb tappet 2, lubricating oil groove 16 has been seted up to plunger 1's top end face and side common fixed, lubricating oil groove 16 is the component of a "ten" font structure, form the fixed connection structure of block type through spacing jump ring 3 and spacing jump ring mounting groove 17 between the bottom outside of plunger 1 and the top inboard of bulb tappet 2, spacing jump ring mounting groove 17 is fixed to be set up at the bottom inboard of plunger 1, the gap that exists between bulb 12 and the ball socket 8 sets up to bulb ball socket lubricating oil entry 14, the space that exists between spring holder 5 and the check valve spring 6 sets up to high-pressure chamber 13, the bottom of check valve steel ball 4 sets up inside the top of check valve spring 6, the minimum external diameter size of spring holder 5 is greater than the biggest external diameter size of check valve spring 6, ball socket 15 has been seted up to the fixed geometric centre position in the inside ball socket 8 bottom.

When the valve lifter is used, a plunger 1 is pressed into a rocker 18, a check valve steel ball 4 is arranged at the lower end of the plunger 1, a check valve spring 6 is arranged at the lower end of the check valve steel ball 4, a spring seat 5 is arranged outside the check valve spring 6, a tappet spring 7 is arranged at the lower end of the spring seat 5, a ball tappet 2 is arranged outside the plunger 1, the plunger 1 and the ball tappet 2 are connected through a limiting clamp spring 3, and a ball socket 8 is arranged at the lower end of the ball tappet 2; the gap generated by abrasion can be automatically compensated in the running process, the noise of the engine caused by the valve actuating mechanism is reduced, the assembly cost of the engine and the maintenance cost of a client are reduced, and the service operation benefit of the client is improved;

a supplementary lubricating oil groove 16 is formed in the arc of the plunger 1, and when the engine works, lubricating oil enters the tappet oil inlet 9 through an oil inlet 19 of the rocker 18 and then enters the supplementary lubricating oil groove 16, and flows downwards into a ball socket lubricating oil inlet 14 along the outer wall of the ball tappet 2 to lubricate the matching surface of a ball socket and reduce abrasion; lubricating oil enters the matching surface of the ball socket and the valve bridge for lubrication through the outer wall of the ball socket 8, the ball socket and the valve bridge lubricating oil inlet, so that abrasion is reduced, and meanwhile, when the lubricating oil passes through the outer wall of the ball tappet 2 and the outer wall of the ball socket 8, the whole hydraulic tappet body is cooled, so that the reliability and the service life of a product are improved;

the plunger 1 is connected with the ball tappet 2 through the limiting snap spring 3, the plunger 1 is provided with a snap spring positioning ring groove and a limiting snap spring mounting groove 17, the ball tappet limiting and anti-falling groove 11 is formed in the ball tappet 2, the limiting snap spring 3 is firstly mounted in a positioning groove of the plunger 1 during assembly, a limiting opening is upward, the plunger is pressed into the ball tappet 2, the limiting snap spring 3 firstly retreats into the mounting groove during pressing, the limiting spring is ejected when the limiting and anti-falling groove 11 of the ball tappet 2 is pressed, and the plunger 1 and the ball tappet 2 are assembled;

when the engine works, lubricating oil enters the tappet oil inlet 9 through the oil inlet hole 19 of the rocker arm 18 and then passes through the check valve oil inlet 10, and under the pressure of the lubricating oil, the check valve steel ball 4 which is kept at the position by the check valve spring 6 is pushed open, so that the lubricating oil enters the high-pressure cavity 13; when a gap is generated between the ball socket 8 and an engine valve bridge due to abrasion, the ball head tappet 2 generates downward thrust after lubricating oil enters the high-pressure cavity 13 and pushes the ball socket 8 to move downwards under the action of a tappet spring until the gap between the ball socket 8 and the valve bridge is eliminated, the lubricating oil cannot enter the high-pressure cavity 13 after the gap is eliminated, the pressure difference between the high-pressure cavity 13 and the check valve oil inlet 10 is eliminated, the check valve spring 6 pushes the check valve steel ball 4 to return to the conical surface of the check valve hole opening to seal the check valve oil inlet 10, when the rocker 18 rotates downwards under the action of the camshaft to drive the hydraulic tappet to move downwards, the valve bridge is pushed through the ball socket 8, the generated reaction force pushes the ball tappet body to move upwards, however, the high pressure chamber 13 is sealed at this time, the pressure in the chamber increases, and the thrust is overcome, so that the valve bridge pushes the valve downwards to complete the gas distribution function.

In the invention, the plunger is fixedly arranged inside the rocker arm in a press-fitting manner, the lower end of the plunger is fixedly provided with a check valve steel ball, the lower end of the check valve steel ball is fixedly provided with a check valve spring, the outer part of the check valve spring is fixedly sleeved with a spring seat, the lower end of the spring seat is fixedly connected with a tappet spring, the outer part of the plunger is fixedly connected with a ball tappet, the lower end of the ball tappet is fixedly provided with a ball socket, the arc part of the plunger is fixedly provided with a lubricating oil groove, the inner part of the rocker arm is fixedly provided with an oil inlet, the inner side of the top of the ball tappet is fixedly provided with a drop-off prevention groove, the inner side of the top of the plunger is fixedly provided with a tappet oil inlet at a position at one side of the rocker arm, the inner part of the plunger and at, and in operation, the clearance generated by abrasion can be automatically compensated, the noise of the engine caused by the valve mechanism is reduced, the assembly cost of the engine and the maintenance cost of a client are reduced, and the service operation benefit of the client is improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.