CN117536703A - Hydraulic control self-locking engine rocker arm piston - Google Patents

Hydraulic control self-locking engine rocker arm piston Download PDF

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Publication number
CN117536703A
CN117536703A CN202311787016.7A CN202311787016A CN117536703A CN 117536703 A CN117536703 A CN 117536703A CN 202311787016 A CN202311787016 A CN 202311787016A CN 117536703 A CN117536703 A CN 117536703A
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CN
China
Prior art keywords
piston
oil
rocker arm
fixed shaft
shaft
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
CN202311787016.7A
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Chinese (zh)
Inventor
孙美芹
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Suzhou Abixin New Materials Technology Co ltd
Original Assignee
Suzhou Abixin New Materials Technology 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 Suzhou Abixin New Materials Technology Co ltd filed Critical Suzhou Abixin New Materials Technology Co ltd
Priority to CN202311787016.7A priority Critical patent/CN117536703A/en
Publication of CN117536703A publication Critical patent/CN117536703A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • 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
    • F01L1/30—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of positively opened and closed valves, i.e. desmodromic valves
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The invention discloses a hydraulic control self-locking engine rocker arm piston which is arranged in a rocker arm and can move relative to the rocker arm. The piston includes: the device comprises a fixed shaft, an oil inlet hole, a piston oil cavity, a piston shaft, an oil return passage and a movable sealing assembly. The fixed shaft is arranged on the rocker arm, and an oil supply cavity is formed between the fixed shaft and the inner wall of the rocker arm; the oil inlet is arranged along the radial direction of the fixed shaft, and one end of the oil inlet is communicated with the oil supply cavity; the piston oil cavity is arranged in the fixed shaft and is communicated with the oil inlet; the piston shaft is at least partially arranged in the piston oil cavity and can move along the piston oil cavity; the oil return channel is arranged along the radial direction of the fixed shaft and is connected with the piston oil cavity; the movable sealing component is sleeved on the fixed shaft and is tightly arranged with the inner wall of the rocker arm and the fixed shaft, and the movable sealing component can axially move relative to the fixed shaft and is used for controlling the inlet and outlet of hydraulic oil between the oil inlet hole and the oil return channel. The hydraulic control self-locking engine rocker arm piston is simple in structure and higher in reliability.

Description

Hydraulic control self-locking engine rocker arm piston
Technical Field
The invention relates to the field of engines, in particular to a hydraulic control self-locking engine rocker arm piston.
Background
With the development of science and technology and the continuous perfection of laws and regulations, the service brake safety problem of heavy trucks is more and more paid attention in recent years. The heavy truck has the characteristic of carrying the load of the whole truck, and under the specific road condition of long downhill, the traditional pneumatic disc brake of the heavy truck card can not meet the requirement of service brake completely, and serious accidents of the damage to the truck and the death of the person are caused in the running process. In order to solve the problem, the auxiliary braking technology in the engine cylinder solves the problem well. The principle of the technology is that the valve is opened and closed in a specific time of the power stroke of the engine by executing piston driving, so that the engine does negative work, and the whole vehicle braking function is realized by using the engine. The engine rocker arm piston serves as an actuating mechanism of an engine braking system and plays a very important role in the system. Currently mainstream engine brake rocker arm pistons mainly include two types, namely a hydraulic retaining piston and a mechanical retaining piston. In comparison, the hydraulic retaining piston is more reliable in practical use due to the small hydraulic compressibility, easy energy acquisition and good unidirectional retention.
However, the conventional hydraulic actuator piston has a relatively complex overall structure from the viewpoint of the structure. From the principle point of view, the piston needs to be filled with oil and drained with oil once every one rotation of the cam in the system operation, and the rocker arm system has high requirements on the reliability of the piston mechanism. Because the piston body inevitably has abrasion after the repeated friction of the fit clearance and the control structure, high-pressure leakage easily occurs in the cavity of the hydraulic piston, so that the piston stroke is insufficient, and the braking effect of the whole machine is finally affected.
Meanwhile, the piston mechanism, the control mechanism and the like in the existing system all belong to non-standard structures, and the sizes of the piston mechanism and the control mechanism are different due to different products, so that special customization is needed. In actual operation, the system has the advantages of more processing contents, complex manufacturing process, more required equipment assets, complex process, long manufacturing time and relatively high manufacturing cost.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a hydraulic control self-locking engine rocker arm piston with simple structure and higher reliability.
To achieve the above object, embodiments of the present invention provide a hydraulically controlled self-locking hold engine rocker arm piston disposed within and movable relative to a rocker arm. The piston includes: the device comprises a fixed shaft, an oil inlet hole, a piston oil cavity, a piston shaft, an oil return passage and a movable sealing assembly. The fixed shaft is arranged on the rocker arm, and an oil supply cavity is formed between the fixed shaft and the inner wall of the rocker arm; the oil inlet is arranged along the radial direction of the fixed shaft, and one end of the oil inlet is communicated with the oil supply cavity; the piston oil cavity is arranged in the fixed shaft and is communicated with the oil inlet hole; the piston shaft is at least partially arranged in the piston oil cavity and can move along the piston oil cavity; the oil return channel is arranged along the radial direction of the fixed shaft and is connected with the piston oil cavity; the movable sealing component is sleeved on the fixed shaft and is tightly arranged with the inner wall of the rocker arm and the fixed shaft, and the movable sealing component can axially move relative to the fixed shaft and is used for controlling the hydraulic oil to enter and exit between the oil inlet hole and the oil return channel;
the movable sealing assembly is provided with an oil supply state and a non-oil supply state, and in the oil supply state, the movable sealing assembly is covered on the oil return duct, and hydraulic oil can enter the piston oil cavity from the oil inlet hole; and in a non-oil supply state, the movable sealing assembly is covered on the oil inlet hole, and hydraulic oil can flow out of the piston oil cavity through the oil return channel.
In one or more embodiments of the present invention, the moving seal assembly includes: a bushing, a return spring and a retainer ring. The bushing is sleeved on the fixed shaft and can move along the fixed shaft, the bushing is closely arranged between the fixed shaft and the rocker arm, and the bushing is used for controlling the on-off of the oil inlet hole and the oil return passage; the reset spring is sleeved on the fixed shaft, one end of the reset spring is connected with the bushing, and the other end of the reset spring is propped against the fixed shaft; the retaining ring is sleeved on the fixed shaft and used for limiting the moving stroke of the bushing.
In one or more embodiments of the present invention, a fixing groove is formed in an outer circumferential surface of the fixing shaft, and the retainer ring is disposed in the fixing groove.
In one or more embodiments of the present invention, a check valve is provided inside the oil inlet hole for preventing the backflow of hydraulic oil from the piston oil chamber to the oil supply chamber.
In one or more embodiments of the present invention, the check valve includes: spherical sealing element, end cap and seal spring. The spherical sealing piece is propped against one end of the oil inlet hole and seals one end of the oil inlet hole; the plug is arranged at the other end of the oil inlet hole; the sealing spring is arranged between the spherical sealing element and the plug, one end of the sealing spring is propped against the plug, the other end of the sealing spring is propped against the spherical sealing element, and the sealing spring has elastic force which enables the spherical sealing element to prop against the oil inlet.
In one or more embodiments of the present invention, a piston stop pin is provided at a bottom of the fixed shaft in a radial direction of the fixed shaft, and extends at least partially to the piston oil chamber for limiting a moving stroke of the piston shaft within the piston oil chamber.
In one or more embodiments of the present invention, two of the piston pins are provided, and the two piston pins are disposed opposite to each other in a radial direction of the fixed shaft.
In one or more embodiments of the invention, the piston shaft is provided with two oppositely disposed guide grooves along the axial direction thereof, and the piston stop pin is at least partially inserted into the guide grooves.
In one or more embodiments of the present invention, one end of the piston shaft is disposed in the piston oil chamber, and the other end thereof is connected to a valve bridge.
In one or more embodiments of the present invention, an inner hexagonal fixing hole is formed at a top end of the fixing shaft for connecting the fixing shaft to the swing arm.
Compared with the prior art, the hydraulic control self-locking engine rocker arm piston is provided with the movable sealing component, and the movable sealing component can move on the fixed shaft according to the movement condition of the rocker arm, so that the flow of hydraulic oil in the piston is controlled, the hydraulic control self-locking of the piston is realized, and the effect of the functions of two large structures of a traditional piston system can be achieved through a single structure. Furthermore, the piston has a simple structure, and the structure is greatly simplified by adopting a standard shaft structure, a standard hole system structure and a standard sphere structure in the structure. In addition, the piston is simple in structure, high in reliability, better in braking effect and lower in manufacturing cost.
Drawings
FIG. 1 is a schematic illustration of a hydraulically controlled self-locking hold engine rocker arm piston according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along the A-A axis in FIG. 1;
FIG. 3 is a schematic illustration of a hydraulically controlled self-locking hold engine rocker arm piston in a non-fueled state according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a hydraulically controlled self-locking hold engine rocker arm piston oil supply condition according to an embodiment of the present invention.
The main reference numerals illustrate:
1-rocker arm, 2-fixed shaft, 21-inner hexagonal fixed hole, 3-oil inlet hole, 4-piston oil cavity, 5-piston shaft, 51-guide groove, 6-oil return channel, 7-movable sealing component, 71-bush, 72-return spring, 73-retainer ring, 74-fixed groove, 8-check valve, 81-spherical sealing element, 82-plug, 83-sealing spring, 9-valve bridge, 10-piston stop pin and a-oil supply cavity.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 1 to 4, a hydraulically controlled self-locking holding engine rocker arm piston according to a preferred embodiment of the present invention is provided in a rocker arm 1 and is movable relative to the rocker arm 1. The piston includes: the fixed shaft 2, the oil inlet hole 3, the piston oil cavity 4, the piston shaft 5, the oil return channel 6 and the movable sealing assembly 7.
The fixed shaft 2 is arranged on the rocker arm 1, and an oil supply cavity a is formed between the fixed shaft 2 and the inner wall of the rocker arm 1. The oil inlet 3 is disposed along a radial direction of the fixed shaft 2 and one end of the oil inlet 3 communicates with the oil supply chamber a. The piston oil cavity 4 is arranged in the fixed shaft 2 and is communicated with the oil inlet hole 3. The piston shaft 5 is at least partially disposed within the piston oil chamber 4 and is movable up and down along the piston oil chamber 4. The oil return passage 6 is provided along the radial direction of the fixed shaft 2 and is connected to the piston oil chamber 4. The movable sealing component 7 is sleeved on the fixed shaft 2, is tightly arranged with the inner wall of the rocker arm 1 and the fixed shaft 2, and can move up and down relative to the fixed shaft 2, and is used for controlling the inlet and outlet of hydraulic oil between the oil inlet hole 3 and the oil return channel 6.
The movable sealing assembly 7 has an oil supply state and a non-oil supply state, and in the oil supply state, the movable sealing assembly 7 is covered on the oil return channel 6, and hydraulic oil can enter the piston oil cavity 4 from the oil inlet hole 3; in the non-oil supply state, the movable sealing assembly 7 is arranged on the oil inlet hole 3 in a covering mode, and hydraulic oil can flow out of the piston oil cavity 4 through the oil return channel 6.
In the above embodiment, the hydraulic control self-locking maintaining engine rocker arm piston is provided with the movable sealing assembly 7, and the movable sealing assembly 7 can move on the fixed shaft 2 according to the movement condition of the rocker arm 1, so that the flow of hydraulic oil in the piston is controlled, and the hydraulic control self-locking of the piston is realized. Furthermore, the piston is simple in structure, high in reliability, better in braking effect and lower in manufacturing cost.
In one embodiment, the mobile sealing assembly 7 comprises: a bushing 71, a return spring 72 and a retainer 73. The bush 71 is sleeved on the fixed shaft 2 and can move along the fixed shaft 2, the bush 71 is closely arranged between the fixed shaft 2 and the rocker arm 1, and the bush 71 is used for controlling the on-off of the oil inlet hole 3 and the oil return channel 6. The return spring 72 is fitted over the fixed shaft 2, and has one end connected to the bush 71 and the other end abutting against the fixed shaft 2. The retainer 73 is sleeved on the fixed shaft 2 and used for limiting the moving stroke of the bushing 71. The outer circumferential surface of the fixed shaft 2 is provided with a fixing groove 74, and the retainer ring 73 is arranged in the fixing groove 74 to prevent the retainer ring 73 from falling off the fixed shaft 2.
In one embodiment, the top end of the fixed shaft 2 is provided with an inner hexagonal fixing hole 21. This structure may be used to mount the piston to the rocker arm 1. Further, the fixed shaft 2 is a stepped shaft, and the fixed groove 74, the oil inlet hole 3, the piston oil chamber 4, the oil return channel 6 and other structures are sequentially arranged on the fixed shaft 2.
The hydraulic control self-locking keeps the working state of the engine rocker arm piston as shown in fig. 3 and 4, and is divided into a non-oil supply state and an oil supply state. The start or stop of the oil supply is controlled by the rocker arm 1, which is not explained here.
FIG. 3 is a schematic illustration of a hydraulically controlled self-locking hold engine rocker arm piston in a non-oil-fed state. At this time, the bush 71 receives an upward force of the return spring 72 to close the oil inlet hole 3. The oil inlet hole 3 is not communicated with the oil supply cavity a, the piston oil cavity 4 is communicated with the outside through the oil return channel 6, and hydraulic oil in the piston oil cavity 4 can flow to the outside. Further, one end of the piston shaft 5 is disposed in the piston oil chamber 4, and the other end is connected with a valve bridge 9. When the piston oil chamber 4 is not filled with hydraulic oil and the valve bridge 9 receives upward thrust, the piston shaft 5 is compressed back into the piston oil chamber 4.
Fig. 4 is a hydraulic control self-locking oil supply state of a rocker arm piston of an engine: at this time, the oil supply chamber a supplies hydraulic oil, and the oil pressure drives the bush 71 down to the oil return passage 6 and seals the oil return passage 6. The oil return duct 6 is not communicated with the outside and is in a sealed state. The oil inlet hole 3 is communicated with the oil supply cavity a, and hydraulic oil enters the piston oil cavity 4 through the oil inlet hole 3. The piston shaft 5 is partially extended from the piston oil chamber 4 by the oil pressure. Further, a one-way valve 8 is arranged in the oil inlet 3, so the oil inlet 3 is a one-way oil inlet loop. At this time, the oil return passage 6 is closed, the hydraulic oil in the piston oil chamber 4 cannot flow out, and the piston shaft 5 and the piston oil chamber 4 form a rigid body connection. When the valve bridge 9 is unable to compress the piston shaft 5, the valve bridge 9 can be driven in the opposite direction by the piston shaft 5, thereby moving downwards a further stroke, opening the engine valve even more. When the supply of hydraulic oil to the oil supply chamber a is stopped, the bush 71 is moved upward by the return spring 72, and the oil inlet hole 3 is closed again, so that the piston is restored to the non-oil supply state as shown in fig. 3.
In one embodiment, the one-way valve 8 comprises: a ball seal 81, a plug 82 and a seal spring 83. The spherical sealing member 81 is abutted against one end of the oil inlet hole 3 and seals one end of the oil inlet hole 3. The plug 82 is disposed at the other end of the oil inlet hole 3. The seal spring 83 is disposed between the ball seal 81 and the plug 82, one end of the seal spring 83 abuts against the plug 82, the other end abuts against the ball seal 81, and the seal spring 83 has an elastic force to abut against the ball seal 81 and the oil inlet 3.
Further, the front end of the plug 82 is a step shaft, which can fix the sealing spring 83, and prevent the sealing spring 83 from falling off. When the oil pressure is greater than the elastic force of the seal spring 83, the spherical seal member 81 is moved away from the oil inlet hole 3, and the hydraulic oil can enter the piston oil chamber 4 from the oil supply chamber a. When the oil pressure is smaller than the elastic force of the seal spring 83, the spherical seal member 81 seals the oil inlet hole 3, and the hydraulic oil cannot enter the piston oil chamber 4 from the oil supply chamber a nor the piston oil chamber 4.
In one embodiment, the bottom of the fixed shaft 2 is provided with a piston stopper pin 10 in the radial direction of the fixed shaft 2, and the piston stopper pin 10 extends at least partially into the piston oil chamber 4 for restricting the travel of the piston in the piston oil chamber 4, thereby preventing the piston shaft 5 from falling out of the piston oil chamber 4. Further, two piston stopper pins 10 are provided, and the two piston stopper pins 10 are disposed opposite to each other in the radial direction of the fixed shaft 2.
The piston shaft 5 is provided with two oppositely arranged guide grooves 51 in the axial direction thereof, and the piston stop pin 10 is at least partially inserted into the guide grooves 51. The upper and lower ends of the guide groove 51 are not communicated with the upper and lower end surfaces of the piston shaft 5. The engagement of the piston pin 10 with the guide groove 51 both guides the movement of the piston shaft 5 and prevents the piston shaft 5 from falling out of the piston oil chamber 4.
In summary, the hydraulic control self-locking engine rocker arm piston is provided with the movable sealing assembly 7, and the movable sealing assembly 7 can move on the fixed shaft 2 according to the movement condition of the rocker arm 1, so that the flow of hydraulic oil in the piston is controlled, the hydraulic control self-locking of the piston is realized, and the effect of the functions of two structures of the traditional piston system can be achieved through a single structure. Furthermore, the piston has a simple structure, and the structure is greatly simplified by adopting a standard shaft structure, a standard hole system structure and a standard sphere structure in the structure. In addition, the piston is simple in structure, high in reliability, better in braking effect and lower in manufacturing cost.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (10)

1. A hydraulically controlled self-locking hold engine rocker arm piston disposed within and movable relative to a rocker arm, the piston comprising:
the fixed shaft is arranged on the rocker arm, and an oil supply cavity is formed between the fixed shaft and the inner wall of the rocker arm;
the oil inlet is arranged along the radial direction of the fixed shaft, and one end of the oil inlet is communicated with the oil supply cavity;
the piston oil cavity is arranged in the fixed shaft and is communicated with the oil inlet hole;
the piston shaft is at least partially arranged in the piston oil cavity and can move along the piston oil cavity;
the oil return passage is arranged along the radial direction of the fixed shaft and is connected with the piston oil cavity; and
the movable sealing component is sleeved on the fixed shaft and is tightly arranged with the inner wall of the rocker arm and the fixed shaft, and the movable sealing component can axially move relative to the fixed shaft and is used for controlling the hydraulic oil to enter and exit between the oil inlet hole and the oil return channel;
the movable sealing assembly is provided with an oil supply state and a non-oil supply state, and in the oil supply state, the movable sealing assembly is covered on the oil return duct, and hydraulic oil can enter the piston oil cavity from the oil inlet hole; and in a non-oil supply state, the movable sealing assembly is covered on the oil inlet hole, and hydraulic oil can flow out of the piston oil cavity through the oil return channel.
2. The hydraulically controlled self-locking hold engine rocker arm piston of claim 1 wherein the moving seal assembly comprises:
the bushing is sleeved on the fixed shaft and can move along the fixed shaft, the bushing is closely arranged between the fixed shaft and the rocker arm, and the bushing is used for controlling the on-off of the oil inlet hole and the oil return passage;
a return spring sleeved on the fixed shaft, one end of the fixed shaft is connected with the bushing, and the other end of the fixed shaft is propped against the fixed shaft; and
and the check ring is sleeved on the fixed shaft and used for limiting the moving stroke of the bushing.
3. The hydraulically controlled self-locking hold engine rocker arm piston of claim 2 wherein the outer peripheral surface of the stationary shaft is provided with a fixed slot, and the retainer ring is disposed in the fixed slot.
4. The hydraulically controlled self-locking hold engine rocker arm piston of claim 1 wherein a check valve is disposed within the oil inlet port for preventing the backflow of hydraulic oil from the piston oil chamber to the oil supply chamber.
5. The hydraulically controlled self-locking hold engine rocker arm piston of claim 4 wherein the check valve comprises:
the spherical sealing piece is propped against one end of the oil inlet hole and seals one end of the oil inlet hole;
the plug is arranged at the other end of the oil inlet hole; the sealing spring is arranged between the spherical sealing element and the plug, one end of the sealing spring is propped against the plug, the other end of the sealing spring is propped against the spherical sealing element, and the sealing spring has elastic force which enables the spherical sealing element to prop against the oil inlet.
6. The hydraulically controlled self-locking hold engine rocker arm piston of claim 1, wherein a piston stop pin is provided at the bottom of the stationary shaft in a radial direction of the stationary shaft, the piston stop pin extending at least partially into the piston oil chamber for limiting a travel of the piston shaft within the piston oil chamber.
7. The hydraulically controlled self-locking hold engine rocker arm piston of claim 6 wherein there are two of the piston stop pins disposed opposite each other along the radial direction of the stationary shaft.
8. The hydraulically controlled self-locking hold engine rocker arm piston of claim 7 wherein the piston shaft is provided with two oppositely disposed guide slots along its axial direction, the piston stop pin being at least partially inserted into the guide slots.
9. The hydraulically controlled self-locking hold engine rocker arm piston of claim 1 wherein one end of the piston shaft is disposed within the piston oil chamber and the other end is connected to a valve bridge.
10. The hydraulically controlled self-locking hold engine rocker arm piston of claim 1 wherein the top end of the stationary shaft is provided with a hexagonal socket for connecting the stationary shaft to the rocker arm.
CN202311787016.7A 2023-12-22 2023-12-22 Hydraulic control self-locking engine rocker arm piston Pending CN117536703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311787016.7A CN117536703A (en) 2023-12-22 2023-12-22 Hydraulic control self-locking engine rocker arm piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311787016.7A CN117536703A (en) 2023-12-22 2023-12-22 Hydraulic control self-locking engine rocker arm piston

Publications (1)

Publication Number Publication Date
CN117536703A true CN117536703A (en) 2024-02-09

Family

ID=89784390

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311787016.7A Pending CN117536703A (en) 2023-12-22 2023-12-22 Hydraulic control self-locking engine rocker arm piston

Country Status (1)

Country Link
CN (1) CN117536703A (en)

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