CN216974950U - Valve clearance adjusting part, valve rocker and engine - Google Patents

Abstract

The utility model belongs to the technical field of engines, and particularly relates to a valve clearance adjusting component, a valve rocker and an engine, wherein the valve clearance adjusting component comprises: the screw rod is arranged on the rocker arm body, an oil hole is formed in the screw rod, the oil inlet end of the oil hole is communicated with the oil duct, a steel ball is arranged at the outlet end of the oil hole, and the steel ball is axially and movably arranged at the outlet end of the oil hole; the fixing seat is fixedly connected to the bottom of the screw rod, an oil cavity is formed in the fixing seat, the oil hole is communicated or stopped with the oil cavity through a steel ball, a mounting through hole and a pressure relief hole are formed in the bottom of the fixing seat, and a liquid inlet end of the pressure relief hole is communicated with the oil cavity; the sliding block is axially and slidably arranged in the mounting through hole, the sliding block is provided with a return spring, the steel ball is arranged at the top end of the return spring, a gap is formed between the matching surface of the sliding block and the fixed seat, and the liquid outlet end of the pressure relief hole is communicated with the gap. The valve train structure reduces the related impact of parts of the valve train, further reduces noise and prolongs the service life.

Description

Valve clearance adjusting part, valve rocker and engine

Technical Field

The utility model belongs to the technical field of engines, and particularly relates to a valve clearance adjusting component, a valve rocker and an engine.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

In the valve actuating mechanism of engine, the valve rocker supports through rocking arm body and camshaft and leans on the cooperation to transmit the thrust of camshaft for the valve bridge, guarantee that the valve can be according to cam profile requirement, accomplish the jar interior admit air and exhaust. Because the thermal expansion of the valve train can cause the valve to close untight, the engine needs to reserve a valve clearance between the valve bridge and the rocker arm in a cold state. However, the valve play can in turn build up into the compressor during operation and generate noise.

SUMMERY OF THE UTILITY MODEL

The object of the utility model is to at least solve the problems of noise and impact wear caused by the reserved valve play in the prior art. The purpose is realized by the following technical scheme:

the utility model provides a valve clearance adjusting component for a valve rocker, which comprises a rocker body provided with an oil channel, and the valve clearance adjusting component comprises:

the screw rod is mounted on the rocker arm body, an oil hole is formed in the screw rod, the oil inlet end of the oil hole is communicated with the oil duct, a steel ball is arranged at the outlet end of the oil hole, and the steel ball is axially and movably mounted at the outlet end of the oil hole;

the fixing seat is fixedly connected to the bottom of the screw rod, an oil cavity is formed in the fixing seat, the oil hole is communicated with or cut off from the oil cavity through the steel ball, an installation through hole and a pressure relief hole are formed in the bottom of the fixing seat, and a liquid inlet end of the pressure relief hole is communicated with the oil cavity;

the sliding block is axially and slidably arranged in the mounting through hole, the sliding block is provided with a return spring, the steel ball is arranged at the top end of the return spring, a gap is formed between the sliding block and the matching surface of the fixing seat, and the liquid outlet end of the pressure relief hole is communicated with the gap.

According to the valve clearance adjusting part provided by the utility model, in the working process, lubricating oil sequentially passes through the oil duct of the rocker arm body and the oil hole formed in the screw rod, so that the pressure of the lubricating oil acting on the steel ball overcomes the elasticity of the return spring and enters the oil cavity to fill the oil cavity, and the valve clearance is compensated; and after the oil cavity is full, if pressure oil continues to enter the oil cavity, the pressure oil can be discharged through the pressure relief hole at the bottom, so that the dynamic filling and pressure relief of the oil cavity are utilized, the valve clearance is always zero, the related impact of parts of the valve mechanism is reduced, the noise is reduced, and the service life is prolonged.

Further, the oil hole includes:

the transverse through oil hole radially penetrates through the screw and is communicated with an oil duct of the rocker arm body;

the axial oil hole is communicated with the transverse through oil hole, and the steel ball is arranged at the outlet end of the axial oil hole.

Furthermore, the outlet end of the axial oil hole is provided with a sealing conical surface, and the spherical surface of the steel ball is matched with the sealing conical surface.

Furthermore, one end, facing the screw rod, of the fixing seat is an open end, a hemispherical surface is arranged on the periphery of the matching section of the screw rod and the fixing seat, and the hemispherical surface is attached to and fixed with the inner side wall of the open end.

Furthermore, the clamping spring is further included, one end of the clamping spring is installed on the sliding block, the other end of the clamping spring is installed on the fixed seat, and the sliding block is installed on the fixed seat through the clamping spring.

Furthermore, the slider is a T-shaped block, the small end of the T-shaped block is inserted into the mounting through hole, and the large end of the T-shaped block and the fixed seat form a matching surface.

Furthermore, an annular groove is formed in the periphery of the small end of the T-shaped block, and the clamp spring is installed in the annular groove.

Furthermore, the small end of the T-shaped block is provided with a guide hole extending axially, and the reset spring is installed in the guide hole.

A second aspect of the present invention provides a valve rocker arm comprising:

a rocker arm body; and the number of the first and second groups,

the valve lash adjusting member as described above.

A third aspect of the utility model provides an engine comprising a valve rocker arm as described above.

The valve rocker arm and the engine according to the embodiment of the utility model have the same advantages as the valve clearance adjusting component, and the details are not repeated.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic structural view (cross-sectional view) of one embodiment of a valve lash adjustment assembly provided in the present invention;

fig. 2 is a structural view (sectional view) showing the use of the valve play adjusting member shown in fig. 1.

In the drawings, the reference numerals denote the following:

1-rocker arm, 11-oil duct;

2-valve clearance adjusting parts;

21-screw, 211-transverse through oil hole, 212-axial oil hole;

22-steel balls;

23-a fixed seat, 231-an oil cavity and 232-a pressure relief hole;

24-a slide block;

25-a return spring;

26-a clamp spring;

3-fastening a nut;

4-valve bridge.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience in description, the relationship of one element or feature to another element or feature as illustrated in the figures may be described herein using spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "over", and the like. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an up and down orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In order to solve the problems of noise and impact wear caused by the reserved valve clearance, the utility model provides a valve clearance adjusting component, which achieves the purpose of automatically compensating the valve clearance by additionally arranging an oil cavity in an adjusting screw of a valve rocker arm, and reduces the impact wear and the generated noise in the working process of a valve mechanism.

Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a valve lash adjusting member according to an embodiment of the present invention; fig. 2 is a view showing a structure of use of the valve play adjusting member shown in fig. 1.

The valve clearance adjusting part 2 provided by the utility model is used for a valve rocker, the valve rocker comprises a rocker body 1 provided with an oil channel 11, the valve clearance adjusting part 2 is arranged on the rocker body 1 and can be regarded as a valve clearance adjusting screw, and the valve clearance adjusting part 2 is arranged and fixed on the rocker body 1 through a fastening nut 3.

In one embodiment, as shown in fig. 1 and 2, the valve clearance adjustment member 2 includes a screw 21, a fixing seat 23, and a slider 24; the screw 21 is a rod body with threads, and the screw 21 penetrates through the rocker arm body 1 and is in threaded connection with the fastening nut 3 so as to fix the valve clearance adjusting component 2 on the rocker arm body 1. The fixed seat 23 is positioned at the bottom of the screw rod 21, the slide block 24 is axially movably arranged at the bottom of the fixed seat 23, and the slide block 24 is connected with the valve bridge 4, so that the motion of the rocker arm body 1 is transmitted to the valve bridge 4, and then the valve is closed and opened.

An oil hole is formed in the screw rod 21, the oil inlet end of the oil hole is communicated with the oil duct 11, a steel ball 22 is arranged at the outlet end of the oil hole, and the steel ball 22 is axially and movably mounted at the outlet end of the oil hole; in the working process, the steel ball 22 can block or open the oil hole under the action of oil pressure and the return spring 25, so that oil can selectively enter the oil chamber 231.

The fixed seat 23 is fixedly connected to the bottom of the screw 21, and an oil cavity 231 is formed in the fixed seat 23, it can also be understood that the fixed seat 23 and the bottom of the screw 21 enclose an oil cavity 231, and the oil cavity is communicated with or cut off from the oil cavity 231 through the steel ball 22. When the downward pressure borne by the steel ball 22 is greater than the upward pressure borne by the steel ball 22, the steel ball 22 moves downwards, the oil cavity 231 is communicated with the oil hole, and oil can be injected into the oil cavity 231; when the downward pressure borne by the steel ball 22 is smaller than the upward pressure borne by the steel ball 22, the steel ball 22 moves upwards to close the oil hole, the oil cavity 231 is cut off from the oil hole, and oil injection to the oil cavity 231 is stopped. The bottom of fixing base 23 has been seted up installation through-hole and pressure release hole 232, the feed liquor end of pressure release hole 232 with oil pocket 231 is linked together, and the installation through-hole is used for installing slider 24, and pressure release hole 232 is used for after filling with oil in oil pocket 231, the pressure release when filling with oil to oil pocket 231 again.

A sliding block 24 is axially slidably mounted in the mounting through hole, a return spring 25 is mounted on the sliding block 24, the steel ball 22 is mounted at the top end of the return spring 25, a gap is formed between the matching surfaces of the sliding block 24 and the fixed seat 23, and the liquid outlet end of the pressure relief hole 232 is communicated with the gap. The return spring 25 can realize the support and the return of the steel ball 22, and the expansion amount of the return spring can automatically compensate the abrasion of related components of the valve train, thereby reducing or eliminating the maintenance times of the valve clearance.

According to the valve clearance adjusting part 2 provided by the utility model, in the working process, lubricating oil sequentially passes through the oil passage 11 of the rocker arm body 1 and the oil holes formed in the screw rod 21, so that the pressure of the lubricating oil acting on the steel ball 22 overcomes the elastic force of the return spring 25 to enter the oil cavity 231, and the oil cavity 231 is filled with the lubricating oil, thereby compensating the valve clearance; when the oil chamber 231 is full, if pressure oil continues to enter the oil chamber 231, the pressure oil can be discharged through the pressure relief hole 232 at the bottom, so that the dynamic full and pressure relief of the oil chamber 231 is utilized, the valve clearance is always zero, the related impact of parts of the valve train is reduced, the noise is reduced, and the service life is prolonged. In addition, the valve clearance adjusting part 2 is simple in structure, few in required parts and risk points, the valve clearance automatic compensating mechanism is concentrated on the valve clearance adjusting part 2, applicability is strong, and replacement is convenient.

Specifically, the oil holes include a transverse through oil hole 211 and an axial oil hole 212. The transverse through oil hole 211 radially penetrates through the screw rod 21 and is communicated with the oil passage 11 of the rocker arm body 1, the axial oil hole 212 is communicated with the transverse through oil hole 211, and the steel ball 22 is arranged at the outlet end of the axial oil hole 212. That is to say, the axial oil hole 212 may be formed on the central axis of the screw rod 21 and communicated with the oil passage 11 through the transverse through holes at both sides, which not only ensures the smoothness of oil injection, but also ensures the uniformity of stress at both sides of the screw rod 21.

In order to facilitate sealing installation, guide can be provided for the steel balls 22 in the action process, and the outlet ends of the axial oil holes 212 are provided with sealing conical surfaces, so that the spherical surfaces of the steel balls 22 are matched with the sealing conical surfaces, and the sealing performance and the fitting performance are better when the steel balls 22 block the oil holes.

The fixing seat 23 and the screw 21 can be connected by adopting an insertion structure, that is, one end of the fixing seat 23 facing the screw 21 is an open end, and the periphery of the matching section of the screw 21 and the fixing seat 23 is provided with a hemispherical surface and is attached and fixed with the inner side wall of the open end through the hemispherical surface.

In the above embodiment, the valve lash adjusting part 2 further includes a snap spring 26, one end of the snap spring 26 is mounted on the slider 24, the other end of the snap spring 26 is mounted on the fixing seat 23, so that the slider 24 is mounted on the fixing seat 23 through the snap spring 26, and the pressure relief hole 232 is disposed outside the snap spring 26. The position of the liquid outlet end of the pressure relief hole 232 is located on the outer side of the clamp spring 26, so that lubricating oil can smoothly flow out through the pressure relief hole 232 when the cam base circle position is reached, meanwhile, the liquid outlet end is located in the range of the matching surface of the mounting seat and the sliding block 24, and the sliding block 24 can seal the pressure relief hole 232 of the cavity to form a stable and reliable high-pressure oil cavity 231 when the cam non-base circle position is reached.

Specifically, the sliding block 24 is a T-shaped block, a small end of the T-shaped block is inserted into the mounting through hole, and a large end of the T-shaped block and the fixing seat 23 form a matching surface. Thus, the small end is fixed with the mounting through hole, the large end is left outside the oil cavity 231, and the sliding block 24 can be sealed through the matching of the large end and the mounting seat when moving upwards.

In order to improve the connection reliability and convenience of the clamp spring 26, an annular groove is formed in the periphery of the small end of the T-shaped block, and the clamp spring 26 is installed in the annular groove.

The guide hole that the axial extends is seted up to the tip of above-mentioned T-shaped piece, reset spring 25 install in the guide hole for slider 24 not only can provide installation space for reset spring 25, and can provide the motion direction for reset spring 25 through the hole lateral wall of guide hole, has guaranteed reset spring 25's motion directionality.

In the above-mentioned embodiment, when the valve lash adjusting member 2 is located at the mounting position, as shown in fig. 2, the slider 24 passes through the mounting through hole formed in the bottom surface of the mounting seat and is axially positioned by the snap spring 26, the return spring 25 is mounted in the guide hole formed in the small end of the slider 24, one end of the return spring 25 away from the slider 24 is matched with the steel ball 22, the spring is in a compressed state, the steel ball 22 is tightly attached to the outlet end of the axial oil hole 212 of the screw rod 21 under the action of the spring force, the snap spring 26 is in contact with the mounting seat under the action of the spring force of the return spring 25, and the upper end of the mounting seat is tightly pressed on the outer circumferential surface below the screw rod 21 by the rolling device, thereby completing the assembly.

In the working process, when a cam (a part for driving the rocker arm to move, not shown in the figure) is in a base circle position, lubricating oil passes through the oil duct 11, the transverse through hole and the axial oil hole 212 of the rocker arm body 1 in sequence and then acts on the steel ball 22, at the moment, the pressure of the lubricating oil acting on the steel ball 22 overcomes the elastic force of the return spring 25 to enter the oil cavity 231, and after the oil cavity 231 is filled, the lubricating oil flows out of the valve clearance adjusting part 2 through the pressure relief hole 232 below and then enters a rocker arm chamber (not shown in the figure) for lubricating parts such as the valve bridge 4 and the like.

When the cam base circle rotates to the ascending section, the stud is driven by the rocker arm body 1 to move downwards, the stud compresses the oil cavity 231, and the pressure in the cavity rises. The pressure of the lubricating oil in the oil chamber 231 acting on the steel balls 22 is greater than the sum of the spring force and the pressure of the lubricating oil in the axial oil hole 212, and the steel balls 22 move upwards to seal the axial oil hole 212 of the screw 21. Under the resultant action of the lubricating oil pressure of the oil cavity 231 and the downward running of the mounting seat, the sliding block 24 is in contact with the mounting seat through a matching surface so as to seal an oil drainage hole, the oil cavity 231 forms a closed space, the pressure is rapidly increased along with the continuous motion of the stud, the oil pressure cavity forms a rigid-body-like structure, and the rocker arm body 1 transmits the force to the valve bridge 4 or the valve through the oil cavity 231 so as to drive the valve to open.

When the cam descending section rotates to the base circle position, the stud moves upwards, the axial force of the sliding block 24 from the valve bridge 4/the valve disappears, only the sliding block 24 and the mounting seat move to the contact position of the snap spring 26 under the downward acting force of the spring force and the oil pressure of the oil cavity 231, the pressure relief hole 232 is opened, the lubricating oil flows out, the pressure in the oil cavity 231 is reduced, and the oil pressure of the axial oil hole 212 overcomes the spring force and enters the oil cavity 231.

A second aspect of the present invention proposes a valve rocker arm comprising:

a rocker arm body 1; and (c) a second step of,

the valve lash adjusting member 2 as described above.

A third aspect of the utility model proposes an engine comprising a valve rocker arm as described above.

The valve rocker arm and the engine according to the embodiment of the utility model have the same advantages as the valve clearance adjusting part 2, and the details are not repeated.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A valve clearance adjustment part for a valve rocker arm, the valve rocker arm including a rocker arm body (1) provided with an oil passage (11), characterized in that the valve clearance adjustment part comprises:

the screw rod (21) is mounted on the rocker arm body (1), an oil hole is formed in the screw rod (21), the oil inlet end of the oil hole is communicated with the oil duct (11), a steel ball (22) is arranged at the outlet end of the oil hole, and the steel ball (22) is axially and movably mounted at the outlet end of the oil hole;

the fixing seat (23) is fixedly connected to the bottom of the screw (21), an oil cavity (231) is formed in the fixing seat (23), the oil hole is communicated or stopped with the oil cavity (231) through the steel ball (22), an installation through hole and a pressure relief hole (232) are formed in the bottom of the fixing seat (23), and a liquid inlet end of the pressure relief hole (232) is communicated with the oil cavity (231);

the sliding block (24) is axially slidably mounted in the mounting through hole, a return spring (25) is mounted on the sliding block (24), the steel ball (22) is mounted at the top end of the return spring (25), a gap is formed between the matching surfaces of the sliding block (24) and the fixing seat (23), and the liquid outlet end of the pressure relief hole (232) is communicated with the gap.

2. The valve lash adjustment member according to claim 1, wherein the oil hole includes:

the transverse through oil hole (211), the transverse through oil hole (211) radially penetrates through the screw (21) and is communicated with an oil passage (11) of the rocker arm body (1);

the axial oil hole (212), the axial oil hole (212) with transversely run through the oilhole (211) and be linked together, steel ball (22) set up in the exit end of axial oilhole (212).

3. A valve play adjustment member according to claim 2, wherein the outlet end of the axial oil hole (212) has a sealing conical surface with which the spherical surface of the steel ball (22) is fitted.

4. The valve clearance adjusting component according to claim 3, wherein one end of the fixing seat (23) facing the screw (21) is an open end, and the periphery of the matching section of the screw (21) and the fixing seat (23) is provided with a hemispherical surface, and the hemispherical surface is attached and fixed to the inner side wall of the open end.

5. A valve lash adjustment member according to claim 4, further comprising a circlip (26), the circlip (26) having one end mounted to the slider (24) and the other end mounted to the fixed seat (23) to mount the slider (24) to the fixed seat (23) via the circlip (26).

6. A valve play adjustment member according to claim 5, wherein the slider (24) is a T-shaped block, the small end of the T-shaped block is inserted into the mounting through hole, and the large end of the T-shaped block and the fixing seat (23) form a matching surface.

7. The valve clearance adjusting component of claim 6, wherein the periphery of the small end of the T-shaped block is provided with an annular groove, and the clamp spring (26) is installed in the annular groove.

8. A valve lash adjustment member according to claim 7, characterized in that the small end of the T-block is provided with an axially extending guide hole in which the return spring (25) is mounted.

9. A valve rocker arm, comprising:

a rocker arm body (1); and (c) a second step of,

the valve play adjustment member according to any one of claims 1 to 8.

10. An engine comprising the valve rocker arm of claim 9.

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