CN116220852A - Ball plunger roll forming's hydraulic tappet - Google Patents
Ball plunger roll forming's hydraulic tappet Download PDFInfo
- Publication number
- CN116220852A CN116220852A CN202310247811.0A CN202310247811A CN116220852A CN 116220852 A CN116220852 A CN 116220852A CN 202310247811 A CN202310247811 A CN 202310247811A CN 116220852 A CN116220852 A CN 116220852A
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- China
- Prior art keywords
- rolling
- cylinder
- hydraulic tappet
- ring groove
- plunger
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- 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.)
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Classifications
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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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
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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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/245—Hydraulic tappets
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention provides a ball plunger roll-formed hydraulic tappet, and relates to the technical field of engine valve actuating mechanisms. The hydraulic tappet comprises a cylinder, wherein a rolling spherical surface is arranged on the upper portion of the cylinder, a rolling ball outer ring groove is arranged on the upper side of the outer wall of the cylinder, a rolling snap ring groove is arranged on the lower side of the outer wall of the cylinder, a plunger oil inlet hole is formed in one end of the rolling snap ring groove, an oil storage cavity is formed in the cylinder, and the wall thickness range of the rolling snap ring groove is 90-100% of the wall thickness of the cylinder. The cold heading blank is processed in a roll forming mode, so that the performance and the function of the assembled hydraulic tappet assembly are completely the same as those of the hydraulic tappet part processed by turning, the wall thickness at the ring groove of a rolling piece can be basically kept consistent with the rest positions, the efficiency is improved, the cost is reduced, the product strength and quality are improved, the strength is higher than that of the turning piece, and the fracture risk is lower.
Description
Technical Field
The invention relates to the technical field of engine valve actuating mechanisms, in particular to a hydraulic tappet formed by rolling a ball plunger.
Background
The hydraulic tappet is a key part in the valve actuating mechanism of the engine, the valve actuating mechanism mainly comprises a cam shaft, the hydraulic tappet, a valve spring, a valve, a push rod, a rocker arm and other parts, the hydraulic tappet is positioned between the cam and the valve, and the valve can be opened and closed on time by utilizing the internal unique mechanism design and automatically adjusting the transmission clearance of the valve actuating mechanism and transmitting the lift change of the cam.
The hydraulic tappet mainly comprises main parts such as a tappet body, a plunger, a ball plunger, a spring seat, a return spring, a one-way valve spring, a steel ball and the like, wherein the plunger is matched with the tappet body by adopting a precise matching part, the plunger can freely stretch out and draw back in the tappet body, the steel ball and the spring form a one-way valve, so that an internal cavity of the hydraulic tappet is divided into a high pressure cavity and a low pressure cavity, in operation, oil is sucked into an inner cavity of the hydraulic tappet through a rocker arm hole under the action of the plunger reciprocating motion and the one-way valve spring, so that the high pressure cavity is full of oil and normally works, the hydraulic tappet is installed at a mounting height between the maximum height and the minimum height of the hydraulic tappet, the plunger has a certain compression amount, and therefore, the hydraulic tappet always bears an axial pressure, and becomes a hydraulic cylinder capable of bearing the valve opening and closing axial pressure of a valve transmission mechanism, so that a lever fulcrum function is realized, when a valve and a cam generate abrasion and thermal expansion change, the plunger automatically stretches into the oil under the action of the high pressure cavity return spring to adjust the valve clearance, so that the valve clearance is automatically adjusted, and the valve clearance is not required to be adjusted in the engine maintenance process.
The traditional hydraulic tappet ball plunger is generally formed by adopting a cold heading mode and then is subjected to turning processing to ensure the dimensional requirements of the ball diameter, the ball outer groove, the clamp spring groove and the like, but a certain time is required to be consumed by adopting the processing mode, and meanwhile, the processing cost is higher.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides the hydraulic tappet with the ball plunger roll formed, which solves the problems that the traditional hydraulic tappet ball plunger needs to be turned after cold heading to ensure the dimensional requirements of the ball diameter, the ball outer groove, the clamp spring groove and the like, thereby bringing about large time consumption and higher processing cost.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a ball plunger roll forming's hydraulic tappet, includes the cylinder, the upper portion of cylinder is provided with the roll extrusion sphere, the outer wall upside of cylinder is provided with the outer annular of roll extrusion ball, the outer wall downside of cylinder is provided with the roll extrusion jump ring annular, the one end of roll extrusion jump ring annular is provided with the plunger inlet port, the inside of cylinder is provided with the oil storage chamber.
Preferably, the wall thickness of the ring groove of the rolling snap ring is 90-100% of the wall thickness of the cylinder.
Preferably, the diameter range of the plunger oil inlet hole is controlled to be 70-75% of the vertical diameter of the rolling snap ring groove.
Preferably, the upper and lower parts of the outer ring groove of the rolling ball head are respectively provided with an inclined surface, and the angle range of the inclined surface is controlled to be 115-125 degrees.
A processing technology of a hydraulic tappet formed by rolling a ball plunger is applied to the hydraulic tappet formed by rolling the ball plunger, and comprises the following method steps:
s1, performing cold heading treatment on an initial workpiece of a hydraulic tappet to obtain a cold heading blank;
s2, placing the cold heading blank of the hydraulic tappet into a rolling die, and adjusting processing parameters of a spinning machine;
s3, starting a spinning machine to operate, carrying out rolling processing on a cold heading blank in a rolling die, generating a rolling spherical surface at the top of the cold heading blank, generating a rolling ball head outer ring groove on the upper side of the outer wall, and generating a rolling snap ring groove on the lower side of the outer wall;
s4, forming a plunger oil inlet hole on one side of the ring groove of the rolling snap ring, and then polishing the column body to achieve the required surface roughness;
s5, cleaning the surface of the cylinder and the oil storage cavity to obtain a finished product of the hydraulic tappet after roll forming, and then transferring to a subsequent assembly process.
Preferably, in the step S3, a disposable punch forming process is adopted for processing when the plunger oil inlet hole is opened.
(III) beneficial effects
The invention provides a hydraulic tappet formed by rolling a ball plunger. The beneficial effects are as follows:
according to the invention, the cold heading blank of the hydraulic tappet is processed in a roll forming processing mode, the performance and the function of the assembled hydraulic tappet assembly are completely the same as those of a hydraulic tappet part processed by turning, the wall thickness at the ring groove of a rolling piece can be basically consistent with the rest positions, the efficiency is improved, the cost is reduced, the product strength and quality are improved, the strength is higher than that of a turning piece, and the fracture risk is lower.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a bottom view of the present invention;
fig. 3 is a side cross-sectional view of the present invention.
Wherein, 1, a column body; 2. rolling the spherical surface; 3. rolling the outer ring groove of the ball head; 4. rolling a snap ring groove; 5. plunger oil inlet hole; 6. and an oil storage cavity.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the utility model provides a ball plunger roll forming's hydraulic tappet, including cylinder 1, cylinder 1's upper portion is provided with roll extrusion sphere 2, cylinder 1's outer wall upside is provided with roll extrusion ball outer annular 3, cylinder 1's outer wall downside is provided with roll extrusion jump ring annular 4, roll extrusion jump ring annular 4's one end is provided with plunger inlet port 5, the oil can get into oil storage chamber 6 through plunger inlet port 5, cylinder 1's inside is provided with oil storage chamber 6, oil storage chamber 6 is used for storing the oil, roll extrusion jump ring annular 4 department's wall thickness scope is cylinder 1 wall thickness 95%, the diameter scope control of plunger inlet port 5 is at roll extrusion jump ring annular 4 vertical diameter's 75%, roll extrusion ball outer annular 3's upper and lower part all is provided with the inclined plane, the angle scope control of inclined plane is 115.
Embodiment two:
further, the embodiment of the invention provides a processing technology of a hydraulic tappet formed by rolling a ball plunger, which is applied to the hydraulic tappet formed by rolling the ball plunger in the embodiment, and specifically comprises the following method steps:
s1, performing cold heading treatment on an initial workpiece of a hydraulic tappet to obtain a cold heading blank;
s2, placing the cold heading blank of the hydraulic tappet into a rolling die, and adjusting processing parameters of a spinning machine to perform rolling processing according to design standards;
s3, starting a spinning machine to operate, carrying out rolling processing on a cold heading blank in a rolling die, generating a rolling spherical surface 2 at the top of the cold heading blank, generating a rolling ball head outer ring groove 3 at the upper side of the outer wall, and generating a rolling snap ring groove 4 at the lower side of the outer wall;
s4, forming a plunger oil inlet hole 5 on one side of the position of the rolling snap ring groove 4, and then polishing the cylinder 1 to achieve the required surface roughness;
s5, cleaning the surface of the cylinder 1 and the oil storage cavity 6 to obtain a finished hydraulic tappet product after roll forming, and then transferring to a subsequent assembly process.
In the step S3, the plunger oil inlet hole 5 is formed by adopting a one-time stamping forming process, and the processing effect is good and the preparation efficiency of the finished product of the hydraulic tappet is ensured.
In the embodiment, the hydraulic tappet finished product is manufactured in a roll forming mode, the strength of the assembled hydraulic tappet assembly is higher than that of a turning piece, the fracture risk is lower, the wall thickness of the ring groove of the rolling piece and the rest positions can be basically kept consistent, the efficiency is improved, the cost is reduced, and meanwhile, the strength and quality of a product are improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a ball plunger roll forming's hydraulic tappet, includes cylinder (1), its characterized in that: the upper portion of cylinder (1) is provided with roll extrusion sphere (2), the outer wall upside of cylinder (1) is provided with roll extrusion bulb outer annular (3), the outer wall downside of cylinder (1) is provided with roll extrusion jump ring annular (4), the one end of roll extrusion jump ring annular (4) is provided with plunger inlet port (5), the inside of cylinder (1) is provided with oil storage chamber (6).
2. The ball plunger roll formed hydraulic lifter of claim 1 wherein: the wall thickness range of the rolling snap ring groove (4) is 90-100% of the wall thickness of the cylinder (1).
3. The ball plunger roll formed hydraulic lifter of claim 1 wherein: the diameter range of the plunger oil inlet hole (5) is controlled to be 70-75% of the vertical diameter of the rolling snap ring groove (4).
4. The ball plunger roll formed hydraulic lifter of claim 1 wherein: the upper part and the lower part of the outer ring groove (3) of the rolling ball head are respectively provided with an inclined surface, and the angle range of the inclined surface is controlled to be 115-125 degrees.
5. A processing technology of a hydraulic tappet formed by rolling a ball plunger is characterized in that: a hydraulic tappet for use in roll forming of a ball plunger as set forth in any one of claims 1-4, comprising the method steps of:
s1, performing cold heading treatment on an initial workpiece of a hydraulic tappet to obtain a cold heading blank;
s2, placing the cold heading blank of the hydraulic tappet into a rolling die, and adjusting processing parameters of a spinning machine;
s3, starting a spinning machine to operate, carrying out rolling processing on a cold heading blank in a rolling die, generating a rolling spherical surface (2) at the top of the cold heading blank, generating a rolling ball head outer ring groove (3) at the upper side of the outer wall, and generating a rolling snap ring groove (4) at the lower side of the outer wall;
s4, forming a plunger oil inlet hole (5) on one side of the rolling snap ring groove (4), and then polishing the cylinder (1) to achieve the required surface roughness;
s5, cleaning the surface of the cylinder (1) and the oil storage cavity (6) to obtain a finished hydraulic tappet product after roll forming, and then transferring to a subsequent assembly process.
6. The process for forming a ball plunger roll-formed hydraulic tappet of claim 5, wherein: in the step S3, a disposable stamping forming process is adopted for processing when the plunger oil inlet hole (5) is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310247811.0A CN116220852A (en) | 2023-03-15 | 2023-03-15 | Ball plunger roll forming's hydraulic tappet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310247811.0A CN116220852A (en) | 2023-03-15 | 2023-03-15 | Ball plunger roll forming's hydraulic tappet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116220852A true CN116220852A (en) | 2023-06-06 |
Family
ID=86584311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310247811.0A Pending CN116220852A (en) | 2023-03-15 | 2023-03-15 | Ball plunger roll forming's hydraulic tappet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116220852A (en) |
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2023
- 2023-03-15 CN CN202310247811.0A patent/CN116220852A/en active Pending
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