CN216642231U

CN216642231U - Valve rocker with lubricating structure

Info

Publication number: CN216642231U
Application number: CN202220073998.8U
Authority: CN
Inventors: 余巧
Original assignee: Yibin Tiangong Machinery Co ltd
Current assignee: Yibin Tiangong Machinery Co ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-05-31
Anticipated expiration: 2032-01-12

Abstract

The utility model discloses a valve rocker with a lubricating structure, relates to the field of engines, and is mainly used for solving the problem that the contact part of the rocker and a valve in the prior art cannot be fully lubricated. Its main structure includes: an oil groove is arranged on the upper cambered surface of the rocker arm, and one end of the oil groove is connected with the valve contact part through the side edge of the rocker arm cambered surface. The oil groove is arranged to concentrate and guide splashed lubricating oil to the contact part for supplying the lubricating oil, the oil groove is not easy to block, and the influence of the lubricating oil pressure and the rotating speed on the oil groove is small, so that the contact part is kept fully lubricated.

Description

Valve rocker with lubricating structure

Technical Field

The utility model relates to the field of engines, in particular to a valve rocker of an overhead camshaft valve actuating mechanism.

Background

The air distribution mechanism of engine (internal combustion engine) is characterized by that according to the requirements of working cycle and ignition sequence in every cylinder of engine the air inlet and outlet valves of every cylinder can be opened and closed at regular time so as to make fresh combustible mixed gas (gasoline engine) or air (diesel engine) be fed into the cylinder in time, and the waste gas can be discharged from the cylinder in time. And in the compression and power stroke, the valve is closed to ensure the sealing of the combustion chamber.

The valve train can be divided into two parts of a valve group and a valve transmission group, wherein the valve group comprises valves and parts related to the valves, and the composition of the valve group is basically irrelevant to the form of the valve train. The valve driving set is composed of cam shaft, timing gear, tappet and its guide rod, push rod and rocker arm, and is used to make the inlet and outlet valves open and close at the time of valve timing and ensure enough opening. The rocker arm is effectively a two-armed lever that redirects force from a pushrod or cam, which acts on the valve stem end to push the valve open.

The rocker arm is in contact with parts such as a valve, a tappet, a cam and the like, when an engine works, the rocker arm swings around the tappet at high frequency, the friction between the rocker arm and the contacted parts is frequent, and the rocker arm is required to have higher strength and also needs to ensure that the contacted parts are fully lubricated. In the prior art, in order to ensure the sufficient lubrication of the contact part of the rocker arm and the tappet, the used scheme is that an oil storage tank is arranged on the rocker arm, the oil inlet hole of the tappet is butted with a lubricating oil channel of a cylinder cover mounting hole, the oil outlet hole of the tappet is butted with the oil storage tank of the rocker arm, and lubricating oil has certain lubricating oil pressure and is supplied to the part to ensure the sufficient lubrication; in order to ensure the sufficient lubrication of the contact part of the rocker arm and the valve, the used scheme is that the rocker arm is provided with an oil hole, and the lubricating oil is sprayed to the surface of the bearing due to the existence of the lubricating oil pressure and the small aperture of the oil hole, so that the lubricating oil splashes to the contact part under the action of the rotating centrifugal force of the bearing to ensure the lubrication. There are many problems in lubrication of the contact portion between the rocker arm and the valve: the low rotational speed of engine, lubricating oil pressure can make the oilhole jet dynamics when lower inadequately, and the bearing rotary centrifugal force is on the small side simultaneously, lubricating oil splashes inadequately, will lead to rocking arm and valve contact site to obtain insufficient lubrication, and then leads to rocking arm abnormal wear, valve abnormal wear, engine abnormal sound etc..

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a valve rocker with a lubricating structure, which solves the problem that the contact part of the rocker and a valve in the prior art cannot be sufficiently lubricated while ensuring the strength of the rocker.

In order to realize the purpose of the utility model, the technical scheme is as follows: the utility model provides a valve rocker with lubricating structure which characterized in that, is equipped with the oil groove on the last cambered surface of rocking arm, oil groove one end is through rocking arm cambered surface side to rocking arm and valve contact position. The arc part of the valve rocker arm contacting with the valve is a lower arc surface of the rocker arm, the back surface of the lower arc surface is an upper arc surface of the rocker arm, one side of the rocker arm arc surface is close to the bearing, one side of the rocker arm is flush with the side edge of the rocker arm, and the rocker arm arc surface is communicated with the two sides of the valve rocker arm arranged at the two ends of the bearing. The oil groove collects lubricating oil splashed by the bearing, and the lubricating oil is guided to the contact part of the rocker arm and the valve by the oil groove for lubrication.

Further, the other end of the oil groove extends to the groove in the rocker arm. The groove is close to the side of bearing for the rocking arm cambered surface in the rocking arm, and the oil groove extends to groove department in the rocking arm, and the lubricating oil that splashes to the bearing that can be better collects because the stickness and the adhesion of lubricating oil self, under the wobbling centrifugal force effect of rocking arm during operation, the lubricating oil that this position was collected can be lubricated along oil groove conveying to rocking arm and valved contact site.

Furthermore, the number of the oil grooves is one, and the oil grooves pass through the contact part of the cambered surface of the rocker arm and the head of the valve. The number of the grooves is small, and the rigidity of the rocker arm is not affected.

Further, the oil grooves are arranged along the symmetrical center line of the rocker arc surface. In the width direction of the rocker arm (namely the axial direction of the bearing), the rocker arm has a certain thickness and is designed symmetrically, and the position of the uniform thickness is the position of the central line.

Further, the cross section of the oil groove is square or arc. The collected and stored lubricating oil is uniform, and meanwhile, the processing is convenient.

The utility model has the beneficial effects that:

firstly, the oil groove is formed to concentrate and guide splashed lubricating oil to the contact part for supplying the lubricating oil, the oil groove is not easy to block, and the influence of lubricating oil pressure and rotating speed on the oil groove is small, so that the contact part is kept fully lubricated;

the oil groove formed in the rocker arm structure does not damage the strength of the rocker arm, and adverse effects of damaging the rocker arm are avoided;

the utility model has simple structure and convenient processing, is convenient for production and manufacture, is convenient for improving manufactured finished products and saves the cost.

Drawings

FIG. 1: the structure of the traditional scheme is shown schematically.

FIG. 2: the utility model has a structure schematic diagram.

FIG. 3: a three-dimensional schematic of the present invention.

Reference numbers and corresponding part names in the drawings:

1-tappet, 2-rocker arm, 2-1-oil storage tank, 2-oil spray hole, 2-3-rocker arm upper arc surface, 2-4-oil groove, 3-cam, 4-valve, A-rocker arm and tappet contact surface, B-rocker arm and valve contact surface.

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.

Fig. 1 shows a conventional valve rocker, a bearing is arranged on a rocker 2, the rocker 2 is respectively contacted with a valve 4, a tappet 1 and a cam 3, an oil storage tank 2-1 is arranged at a contact part A of the rocker 2 and the tappet 1, an oil inlet of the tappet 2 is butted with a lubricating oil passage of a cylinder cover mounting hole, an oil outlet of the tappet 1 is butted with the oil storage tank 2-1 of the rocker 2, and the lubricating oil has certain oil pressure and is supplied to the part A to ensure sufficient lubrication; the oil storage tank 2-1 is provided with a through oil injection hole 2-2 towards the direction of the bearing, the lower cambered surface of the rocker arm 2 is in contact with the valve 4 at a part B, and the diameter of the oil hole 2-2 is smaller, so that lubricating oil is injected to the surface of the bearing and splashed to the part B under the action of the rotating centrifugal force of the bearing. The low rotational speed of engine, the oil pressure can make oilhole 2-2 jet dynamics be not enough when lower, and the bearing rotary centrifugal force is on the small side simultaneously, and lubricating oil splashes inadequately, will lead to B position to obtain insufficient lubrication, and then leads to rocking arm abnormal wear, valve abnormal wear, engine abnormal sound etc..

Fig. 2 and 3 show that, for the valve rocker with a lubricating structure provided by the utility model, a bearing is arranged on a rocker 2, the rocker 2 is respectively contacted with a valve 4, a tappet 1 and a cam 3, a part a where the rocker 2 is contacted with the tappet 1 is provided with an oil storage tank 2-1, an oil inlet hole of the tappet 2 is butted with a cylinder cover mounting hole lubricating oil passage, an oil outlet hole of the tappet 1 is butted with the oil storage tank 2-1 of the rocker 2, the oil storage tank 2-1 is provided with a through oil hole 2-2 towards the bearing, and the diameter of the oil hole 2-2 is smaller; the lower cambered surface of the rocker arm 2 is in contact with a valve 4 at a position B, an oil groove 2-4 is formed in an upper cambered surface 2-3 of the rocker arm, the oil groove 2-4 is formed in a symmetrical center line of the upper cambered surface 2-3 of the rocker arm, one end of the oil groove 2-4 extends to the position B in contact with the valve 4 through the upper cambered surface 2-3 of the rocker arm, and the other end of the oil groove 2-4 extends to a middle groove of the rocker arm.

When the lubricating oil lubricating device is used, lubricating oil introduced from a lubricating oil channel of a cylinder cover mounting hole enters the tappet 1 through an oil inlet hole of the tappet 1, is sprayed out through an oil outlet hole of the tappet and is sprayed into the oil storage tank 2-1 to lubricate a contact part A of the rocker arm 2 and the tappet 1; lubricating oil in the oil storage tank 2-1 is sprayed to the surface of the bearing through the oil hole 2-2, the lubricating oil splashes under the action of the rotating centrifugal force of the bearing, and the splashed lubricating oil is collected and guided to the contact part B through the oil tank to fully lubricate the part B.

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

1. The valve rocker with the lubricating structure is characterized in that an oil groove (2-4) is formed in an upper arc surface (2-3) of the rocker, and one end of the oil groove (2-4) extends to a position (B) in contact with a valve through the side edge of the arc surface of the rocker.

2. A valve rocker arm with a lubricating structure according to claim 1, characterised in that the other ends of the oil grooves (2-4) extend to the groove in the rocker arm.

3. A valve rocker arm having a lubricating structure according to claim 1 or 2, characterized in that the number of the oil grooves (2-4) is one.

4. A valve rocker arm having a lubricating structure according to claim 3, characterized in that the oil grooves (2-4) are arranged along the symmetrical center line of the rocker arm's upward curved surface (2-3).

5. A valve rocker arm with a lubricating structure according to claim 1 or 2, characterized in that the oil groove (2-4) is square or curved in cross-section.