CN113389609A - Vibration reduction valve bridge - Google Patents

Vibration reduction valve bridge Download PDF

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Publication number
CN113389609A
CN113389609A CN202110720294.5A CN202110720294A CN113389609A CN 113389609 A CN113389609 A CN 113389609A CN 202110720294 A CN202110720294 A CN 202110720294A CN 113389609 A CN113389609 A CN 113389609A
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CN
China
Prior art keywords
valve bridge
spring
deep hole
spring cap
cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110720294.5A
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Chinese (zh)
Inventor
杨剑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangxi Yuchai Machinery Co Ltd
Original Assignee
Guangxi Yuchai Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangxi Yuchai Machinery Co Ltd filed Critical Guangxi Yuchai Machinery Co Ltd
Priority to CN202110720294.5A priority Critical patent/CN113389609A/en
Publication of CN113389609A publication Critical patent/CN113389609A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
    • F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/03—Reducing vibration

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The embodiment of the application discloses damping valve bridge for reduce the impact of collision and strike the influence to valve train system, thereby reduce because of the collision impact leads to the incidence of valve train trouble. The application includes: the valve bridge comprises a valve bridge body, a spring cap and a spring structure; the valve bridge body is provided with a deep hole, and the deep hole is positioned in the center of the position where the head of the rocker arm presses the valve bridge body; one side of the spring structure is fixedly connected with the bottom of the deep hole, and the other side of the spring structure is fixedly connected with the spring cap; the spring cap is accommodated in the deep hole; when the valve bridge body is impacted by collision, the spring structure is used for applying a reverse acting force to the spring cap so as to attenuate the impact force of the collision on the spring cap.

Description

Vibration reduction valve bridge
Technical Field
The embodiment of the application relates to the technical field of engines, in particular to a damping valve bridge.
Background
With the development of the technology, the rotating speed of the automobile engine is higher and higher, and the traditional two valves cannot complete the air exchange operation within the short time, so that the improvement of the engine performance is limited. The overall quality of the engine cannot be greatly improved until the multi-valve technology is popularized subsequently.
At present, a multi-valve engine on an automobile is mostly of a four-valve type, valves arranged on two sides of a combustion center line of a cylinder are controlled by two overhead camshafts, the valves are arranged on inclined positions on two sides of the center of a combustion chamber of the cylinder, the diameter of a valve head can be enlarged as much as possible, the air flow passing area is enlarged, and a compact combustion chamber with a spark plug positioned in the center is formed.
When the automobile runs on the road, if the whole automobile collides with an uneven road surface, parts such as a push rod, a tappet, a valve bridge and the like which can move freely collide with fixed parts such as a rocker arm and the like, and the instantaneous high-speed collision can generate stress and deformation and propagate in the parts in a wave form, so that valve chain parts such as a valve, a rocker arm bolt and the like are easily damaged, and the valve chain system is broken.
Disclosure of Invention
The embodiment of the application provides a damping valve bridge for reduce the impact of collision and impact to valve train system, thereby reduce because of the collision impact leads to the incidence of valve train trouble.
The application provides a damping valve bridge includes:
the valve bridge comprises a valve bridge body, a spring cap and a spring structure;
the valve bridge body is provided with a deep hole, and the deep hole is positioned in the center of the position where the head of the rocker arm presses the valve bridge body;
one side of the spring structure is fixedly connected with the bottom of the deep hole, and the other side of the spring structure is fixedly connected with the spring cap;
the spring cap is accommodated in the deep hole;
when the valve bridge body is impacted by collision, the spring structure is used for applying a reverse acting force to the spring cap so as to attenuate the impact force of the collision on the spring cap.
Optionally, the bottom surface of the deep hole is an inward concave spherical surface, and the inward concave spherical surface is used for buffering the spring structure when the spring structure deforms under impact force.
Optionally, a buffer glue is arranged on the inner wall of the deep hole, and the buffer glue is used for reducing an acting force generated by the spring cap and the inner surface of the deep hole.
Optionally, the bottom area of the deep hole is smaller than the area of the pressing position.
Optionally, the spring cap is a hard cap type structure.
Optionally, the spring cap is detachably connected with the spring structure.
Optionally, the spring structure comprises at least two springs for increasing the impact-absorbing force.
Optionally, the spring structure has different spring strengths between the springs.
Optionally, the outer surface of the spring cap is wrapped with a rubber coating, and the rubber coating is used for slowing down the impact effect on the spring cap.
Optionally, a rubber impact reduction action block is inlaid at the top of the spring cap, and the rubber impact reduction action block is used for increasing friction between the spring cap and the rocker arm head.
According to the technical scheme, the embodiment of the application has the following advantages:
in this application, a valve bridge including valve bridge body, spring cap and spring structure is provided, be provided with the deep hole on this valve bridge body and be used for holding spring cap and spring structure, when the valve bridge body receives the collision impact, a reverse effort can be applyed to the spring cap to the spring structure to the collision impact force that the decay spring cap received, thereby reach and reduce the impact and strike the influence to valve chain system, reduce the incidence of valve chain trouble because of the collision impacts and leads to.
Drawings
Fig. 1 is a schematic structural view of a damper valve bridge in an embodiment of the present application.
Detailed Description
The four-valve engine has two overhead cam shafts to control the valves on two sides of the combustion center line of the cylinder, and the valves are set in the inclined positions in the center of the combustion chamber to expand the diameter of the valve head and increase the airflow area to form one compact combustion chamber with spark plug in the center.
The valve bridge is mostly used by the current heavy four-valve diesel engine, when the engine works, power drives the rocker arm to rotate around the rocker arm shaft through the tappet and the push rod along with the rotation of the camshaft, so that the rocker arm drives the valve bridge to open the valve, air is input into the engine, and exhaust gas after the engine burns is discharged. When the whole vehicle and the engine are in a static state, the valve bridge is attached to the top of the valve rod under the action of gravity.
When the automobile runs on the road, if the whole automobile collides with an uneven road surface, parts such as a push rod, a tappet, a valve bridge and the like which can move freely collide with fixed parts such as a rocker arm and the like, and the instantaneous high-speed collision can generate stress and deformation and propagate in the parts in a wave form, so that valve chain parts such as a valve, a rocker arm bolt and the like are easily damaged, and the valve chain system is broken.
Based on this, the application provides a valve bridge, can be when four valve engine during operation, when the valve bridge body receives the collision impact, the spring structure that the valve bridge inside was established can exert a counter action power to the spring cap to the collision impact force that the damping spring cap received.
The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all 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 application.
Referring to fig. 1, the present application provides a shock absorbing valve bridge comprising: the valve bridge comprises a valve bridge body 1, a spring cap 2 and a spring structure 3; a deep hole 4 is arranged on the valve bridge body 1, and the deep hole 4 is positioned in the center of the position where the head part of the rocker arm compresses the valve bridge body 1; one side of the spring structure 3 is fixedly connected with the bottom of the deep hole 4, and the other side of the spring structure is fixedly connected with the spring cap 2; the spring cap 2 is accommodated in the deep hole 4; the spring structure 4 is adapted to apply a counter-acting force to the spring cap 2 to attenuate the impact force to which the spring cap 2 is subjected when the valve bridge body 1 is subjected to a collision impact.
Specifically, the deep hole 4 of the valve bridge body 1 is not limited in depth, but does not penetrate through the valve bridge body 1. When the spring cap 2 in the deep hole 4 is subjected to impact force, the spring cap 2 moves downwards due to the compression of the impact force, and then the spring structure 3 is pressed downwards, so that the spring structure 3 also generates certain deformation. In order to reduce the abrasion of the spring structure 3, the bottom surface of the deep hole 4 is set to be a concave spherical surface, so that when the spring structure 3 is deformed by an instant impact force, the deformation speed is slowed down, and a certain buffering effect is exerted on the spring structure 3. Further, the bottom area of the deep hole is smaller than the area of the pressed position, that is, the area of the rocker arm head contacting the valve bridge body 1, so that the rocker arm head is prevented from sinking into the deep hole 4.
Optionally, for the spring cap 2, the spring cap 2 may be a hard cap structure, and may be made of a metal material, or a non-metal material such as plastic or rubber. In order to relieve the impact action on the spring cap 2 in the process of collision impact on the valve chain system, a layer of rubber coating can be coated on the outer surface of the spring cap 2 to increase the friction between the spring cap 2 and the head of the rocker arm; and a rubber impact action block can be embedded on the top of the spring cap 2. Furthermore, in order to reduce the abrasion of the spring cap 2 in the operation process of the valve train system, a buffer glue can be arranged on the inner wall of the deep hole 4, so that the effect of reducing the acting force generated by the inner surfaces of the spring cap 2 and the deep hole 4 is achieved.
Optionally, for the spring structure 3, in order to determine whether the spring structure 3 needs to be replaced according to the wear condition of the spring structure 3, the spring cap 2 and the spring structure 3 may be detachably connected, when it is determined that the spring structure 3 is seriously worn and needs to be replaced, the connection between the spring cap 2 and the spring structure 3 may be disconnected, and the new spring structure 3 is replaced and then connected with the spring cap 2 again. In addition, in order to improve the impact resistance, i.e., increase the impact-absorbing force against collision, at least two springs may be included in the spring structure 3, and the springs have different elastic strengths, some springs have larger elastic force and some springs have smaller elastic force.
The valve train system consists of two parts, namely a valve group and a valve transmission group, wherein the valve group consists of an inlet valve, an exhaust valve, a valve guide pipe, a valve bridge body and other parts, and the valve transmission group consists of a camshaft, a rocker shaft, a rocker arm, a push rod, a tappet and the like.
In the embodiment of the application, when the four-valve engine works, the valve bridge body 1 is driven by the camshaft through the tappet and the push rod, when the convex part of the cam jacks up the tappet, the tappet can push the push rod to move upwards together, the push force acting on the rocker arm enables the rocker arm to rotate around the shaft, and the other end of the rocker arm compresses the valve spring to enable the valve bridge body 1 to move downwards, namely, a combustion chamber is opened; as the camshaft continues to rotate, when the lobe of the camshaft leaves the tappet, the valve bridge body 1 moves upward under the spring force of the valve spring, i.e. closes the combustion chamber. In the process of opening or closing the combustion chamber, because the clearance between the spring cap 2 and the deep hole 4 is small, when collision impact is carried out, air sealed by the spring cap 2 and the hole is difficult to leak out immediately, a certain air spring effect is achieved, when the spring cap 2 moves downwards, the spring structure 3 gives a reverse acting force to the spring cap 2, the downward movement of the spring cap is prevented, and therefore the instantaneous collision speed of the valve bridge body 1 and the rocker arm is reduced when the collision impact is relieved.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for explaining relative positional relationships between the respective members or components, and do not particularly limit specific mounting orientations of the respective members or components.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are intended to be illustrative only and are not intended to be limiting, since the scope of the invention will be defined by the appended claims, and are not intended to be limiting, since all changes in structure, proportions, and modifications thereof, which are within the spirit of the invention, will fall within the scope of the invention.

Claims (10)

1. A vibration dampening valve bridge, comprising:
the valve bridge comprises a valve bridge body, a spring cap and a spring structure;
the valve bridge body is provided with a deep hole, and the deep hole is positioned in the center of the position where the head of the rocker arm presses the valve bridge body;
one side of the spring structure is fixedly connected with the bottom of the deep hole, and the other side of the spring structure is fixedly connected with the spring cap;
the spring cap is accommodated in the deep hole;
when the valve bridge body is impacted by collision, the spring structure is used for applying a reverse acting force to the spring cap so as to attenuate the impact force of the collision on the spring cap.
2. The vibration damping valve bridge of claim 1, wherein the bottom surface of the deep hole is a concave spherical surface, and the concave spherical surface is used for buffering the spring structure when the spring structure is deformed by impact force.
3. The vibration damping valve bridge of claim 2 wherein a cushion gum is disposed on the inner wall of the deep hole, the cushion gum for reducing the force generated by the spring cap and the inner surface of the deep hole.
4. The vibration dampening valve bridge of claim 3 wherein the bottom area of the deep hole is less than the area of the compression location.
5. The vibration damping valve bridge of claim 4 wherein the spring cap is a hard cap type structure.
6. The vibration damper valve bridge of claim 5 wherein the spring cap is removably connected to the spring structure.
7. The damper valve bridge of claim 6, wherein the spring structure comprises at least two springs for increasing the damping force against a collision.
8. The damper valve bridge of claim 8, wherein the spring strength differs between springs in the spring structure.
9. The damper valve bridge of any one of claims 1 to 8, wherein the outer surface of the spring cap is coated with a rubber coating for cushioning the spring cap from impact.
10. The damper valve bridge of any one of claims 1 to 8, wherein the top of the spring cap is inlaid with a rubber shock absorbing action block for increasing friction of the spring cap with the rocker arm head.
CN202110720294.5A 2021-06-28 2021-06-28 Vibration reduction valve bridge Pending CN113389609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110720294.5A CN113389609A (en) 2021-06-28 2021-06-28 Vibration reduction valve bridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110720294.5A CN113389609A (en) 2021-06-28 2021-06-28 Vibration reduction valve bridge

Publications (1)

Publication Number Publication Date
CN113389609A true CN113389609A (en) 2021-09-14

Family

ID=77624186

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110720294.5A Pending CN113389609A (en) 2021-06-28 2021-06-28 Vibration reduction valve bridge

Country Status (1)

Country Link
CN (1) CN113389609A (en)

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