CN112096475A - Hydraulic tappet anti-rotation structure and V-shaped two-cylinder piston engine - Google Patents
Hydraulic tappet anti-rotation structure and V-shaped two-cylinder piston engine Download PDFInfo
- Publication number
- CN112096475A CN112096475A CN202011008248.4A CN202011008248A CN112096475A CN 112096475 A CN112096475 A CN 112096475A CN 202011008248 A CN202011008248 A CN 202011008248A CN 112096475 A CN112096475 A CN 112096475A
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- China
- Prior art keywords
- hydraulic tappet
- tappet
- rotation
- piston engine
- hydraulic
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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
- F01L1/146—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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- 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
- F01L1/25—Hydraulic tappets between cam and valve stem
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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
- F01L1/46—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-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses an anti-rotation structure of a hydraulic tappet, which comprises an anti-rotation support plate arranged between two hydraulic tappets, wherein the anti-rotation support plate is provided with a limiting surface, the hydraulic tappet is provided with a contact surface in contact with the limiting surface, the limiting surface and the contact surface are planes parallel to the axis of the hydraulic tappet, a cam shaft is positioned below the hydraulic tappet, the hydraulic tappet is arranged in an inclined manner, and rollers in contact with the cam shaft are arranged on the hydraulic tappet. The anti-rotation structure of the hydraulic tappet can meet the structural design requirement of a V-shaped two-cylinder piston engine. The invention also provides a V-shaped two-cylinder piston engine.
Description
Technical Field
The invention belongs to the technical field of piston engines, and particularly relates to a hydraulic tappet anti-rotation structure and a V-shaped two-cylinder piston engine.
Background
The valve actuating mechanism is one of the key mechanisms of the piston engine, and the valve actuating mechanism regularly opens and closes an air inlet valve and an air outlet valve according to the ignition sequence and the working process requirements of the engine, supplies combustible mixed gas (a gasoline engine) or fresh air (a diesel engine) to an air cylinder and discharges waste gas in time, meets the air inlet and exhaust requirements of the engine, and meets the performance requirements of the engine through reasonable air inlet and exhaust time design. The valve train has the advantages of multiple moving parts, multiple influence factors, complex stress condition of each part in the moving process, high requirements on the precision and the strength of each part, and great influence of the performance level of the valve train on the dynamic performance, NVH performance and reliability of the engine. The tappet is used in different arrangement structures, and is divided into a mechanical tappet and a hydraulic tappet according to the structural characteristics of the tappet. According to different arrangement structures of the valve actuating mechanism, the tappet is different in installation position and same in function, and is used for providing support for opening and closing the valve and serving as a transmission support piece on a valve opening transmission route. The tappet is arranged between the cam and the push rod and can be a flat-bottom mechanical tappet with a roller or a flat-bottom hydraulic tappet with a roller as a transmission link between the cam and the push rod. The contact stress between the cam and the tappet can be reduced by the roller, and the mechanical tappet only needs splash lubrication without arranging a high-pressure oil way. The hydraulic tappet provides a flexible supporting function, the motion impact of a valve mechanism can be effectively reduced, the NVH performance is improved, and a high-pressure oil way and an oil return channel need to be arranged on the engine according to the working principle and the structural requirement of the hydraulic tappet.
When the tappet with the roller is designed, an anti-rotation structure must be designed, the axis of the roller is ensured to be parallel to the bus of the cam, and the driving function is met. If relative rotation occurs, abnormal abrasion of the tappet roller and the cam can be caused. The existing anti-rotation scheme is that according to the flat structure of a tappet body, a bulge is processed at a corresponding position in an installation hole and is matched with the plane of the tappet to prevent the tappet from rotating; and secondly, the tappet body is provided with an anti-rotation pin, and a pin groove is processed in the tappet mounting hole to realize anti-rotation. These anti-rotation schemes are suitable for engines that facilitate the machining of the flat square projections and pin grooves. When the V-shaped two-cylinder piston engine cannot process flat square bulges or pin slot holes from the bottom surface due to arrangement requirements, the limiting of the roller hydraulic tappet cannot be realized, and the structural design requirements of the engine cannot be met.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a hydraulic tappet anti-rotation structure, and aims to meet the structural design requirement of a V-shaped two-cylinder piston engine.
In order to achieve the purpose, the invention adopts the technical scheme that: hydraulic tappet prevents changeing structure, including setting up the backup pad of preventing changeing between two hydraulic tappet, prevent changeing the backup pad and have spacing face, the hydraulic tappet have with the contact surface of spacing face contact, spacing face and contact surface are the plane that parallels with the axis of hydraulic tappet, the camshaft of two jar piston engine of V type is located the below of hydraulic tappet, the hydraulic tappet is arranged and set up the gyro wheel with the camshaft contact for the slope on the hydraulic tappet.
The anti-rotation supporting plate is fixed on a cylinder body of the V-shaped two-cylinder piston engine through a bolt.
The anti-rotation support plate is provided with a positioning sleeve, the cylinder body is provided with a positioning hole for inserting the positioning sleeve, and the bolt penetrates through the positioning sleeve.
The invention also provides a V-shaped two-cylinder piston engine which comprises the hydraulic tappet anti-rotation structure.
The anti-rotation structure of the hydraulic tappet can meet the structural design requirement of a V-shaped two-cylinder piston engine; the corresponding position on the anti-rotation structure cylinder body is simple in processing technology, the processing consistency is easy to guarantee, and the processing efficiency is high; the anti-rotation supporting plate structure is formed by a die, so that the cost is low and the precision is high; the anti-rotation structure is assembled without an additional auxiliary tool, the assembly process is simple, and the anti-rotation effect is good.
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a schematic structural view of a hydraulic tappet anti-rotation structure according to the present invention;
FIG. 2 is a schematic view of the installation position of the anti-rotation structure of the hydraulic tappet of the present invention;
FIG. 3 is an assembly schematic view of a hydraulic tappet anti-rotation structure of the present invention;
labeled as:
1. a cylinder body; 2. a camshaft; 3. hydraulic tappet; 4. a bolt; 5. an anti-rotation support plate; 6. a positioning sleeve.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.
As shown in fig. 1 to 3, the invention provides an anti-rotation structure for a hydraulic tappet 3, which includes an anti-rotation support plate 5 disposed between two hydraulic tappets 3, wherein the anti-rotation support plate 5 has a limiting surface, the hydraulic tappet 3 has a contact surface contacting with the limiting surface, the limiting surface and the contact surface are both planes parallel to the axis of the hydraulic tappet 3, a camshaft 2 of a V-shaped two-cylinder piston engine is located below the hydraulic tappet 3, the hydraulic tappet 3 is arranged in an inclined manner, and a roller contacting with the camshaft 2 is disposed on the hydraulic tappet 3.
Specifically, as shown in fig. 1 to 3, the V-type two-cylinder piston engine has two cylinders arranged in a V-shape and having an angle of 90 degrees between the axes of the two cylinders. Each cylinder all arranges two (air) intake valves and two exhaust valves, and every rocking arm passes through two valves of valve bridge simultaneous drive, and camshaft 2 is put down, and push rod and hydraulic tappet 3 slope are arranged, and hydraulic tappet 3 is installed in the tappet hole that sets up on cylinder body 1, and hydraulic tappet 3 carries out reciprocating motion in the tappet hole of cylinder body 1 inside. Hydraulic tappet 3 is located between camshaft 2 and the push rod, and the gyro wheel is rotatable setting in hydraulic tappet 3's lower extreme, and the gyro wheel is the cylinder, and the axis of gyro wheel parallels with camshaft 2's axis, and the outer disc of gyro wheel contacts with camshaft 2. The high-pressure oil duct and the tappet oil duct which are arranged on the cylinder body 1 are the same, and the working oil pressure requirement of the tappet is met.
As shown in fig. 1 to 3, the rotation preventing support plate 5 is fixed to the cylinder block 1 by a bolt 4. Prevent changeing backup pad 5 and be the rectangle flat board, prevent changeing backup pad 5 and be located between the upper end of two hydraulic tappet 3, the gyro wheel that the lower extreme of these two hydraulic tappet 3 set up is coaxial setting, prevent changeing backup pad 5 and have two spacing faces, the terminal surface at these two spacing faces for preventing changeing backup pad 5's relative both ends, two spacing faces laminate with the contact surface that the upper end of two hydraulic tappet 3 set up respectively, thereby can play to hydraulic tappet 3 and prevent changeing the effect, the good reliability, arrange easily.
As shown in fig. 1 to 3, the anti-rotation support plate 5 is provided with a positioning sleeve 6, the cylinder body 1 has a positioning hole into which the positioning sleeve 6 is inserted and an internal threaded hole into which the bolt 4 is inserted, and the bolt 4 passes through the positioning sleeve 6. The locating hole and the internal thread hole are coaxially arranged, the diameter of the locating hole is larger than that of the internal thread hole, the locating sleeve 6 is of a circular ring-shaped structure, one end of the locating sleeve 6 is inserted into the mounting hole formed in the anti-rotation supporting plate 5, and the other end of the locating sleeve 6 is inserted into the locating hole, so that the position accuracy of the overturning supporting plate is ensured. The bolt 4 passes through the bolt hole arranged on the anti-rotation support plate 5 and the center hole of the positioning sleeve 6 in sequence and then is inserted into the internal thread hole on the cylinder body 1, so that the anti-rotation support plate 5 can be fixed on the cylinder body 1. The bolt hole is arranged at the center of the anti-rotation support plate 5, the bolt 4 is positioned in the middle of the two limiting surfaces, and the axis of the bolt 4 is parallel to the axis of the hydraulic tappet 3.
Above-mentioned rotation-proof structure utilizes and prevents that rotation-proof backup pad 5 prevents that hydraulic tappet 3 from rotating, adds screw hole and locating hole on the cylinder body 1, utilizes two limits of square rotation-proof backup pad 5 and the flat side on two tappet bodies to prevent that the tappet rotates. After the camshaft 2 is assembled, the hydraulic tappet 3 is firstly assembled in the tappet hole of the cylinder body 1, the axis of the roller is ensured to be parallel to the axis of the camshaft 2, the anti-rotation supporting plate 5 is assembled between the two hydraulic tappets 3, and finally the anti-rotation supporting plate 5 is fixed on the cylinder body 1 through the bolt 4 and the locating sleeve 6.
The invention also provides a V-shaped two-cylinder piston engine which comprises the anti-rotation structure of the hydraulic tappet 3 with the structure. The specific structure of the anti-rotation structure of the hydraulic tappet 3 can refer to fig. 1 to 3, and is not described herein again. Since the V-type two-cylinder piston engine of the present invention includes the anti-rotation structure of hydraulic tappet 3 in the above-described embodiment, it has all the advantages of the anti-rotation structure of hydraulic tappet 3 described above.
The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.
Claims (4)
1. Hydraulic tappet prevents rotating structure, its characterized in that: including setting up the backup pad of preventing changeing between two hydraulic tappet, prevent changeing the backup pad and have spacing face, the hydraulic tappet has the contact surface with spacing face contact, spacing face and contact surface are the plane that parallels with the axis of hydraulic tappet, and the camshaft of V type two cylinder piston engine is located the below of hydraulic tappet, and the hydraulic tappet sets up the gyro wheel with the camshaft contact for the slope arranges and on the hydraulic tappet.
2. The hydraulic tappet anti-rotation structure according to claim 1, wherein: the anti-rotation supporting plate is fixed on a cylinder body of the V-shaped two-cylinder piston engine through a bolt.
3. The hydraulic tappet anti-rotation structure according to claim 2, wherein: the anti-rotation support plate is provided with a positioning sleeve, the cylinder body is provided with a positioning hole for inserting the positioning sleeve, and the bolt penetrates through the positioning sleeve.
V type two cylinder piston engine, its characterized in that: comprising a hydraulic tappet anti-rotation structure according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011008248.4A CN112096475B (en) | 2020-09-23 | 2020-09-23 | Hydraulic tappet anti-rotation structure and V-shaped two-cylinder piston engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011008248.4A CN112096475B (en) | 2020-09-23 | 2020-09-23 | Hydraulic tappet anti-rotation structure and V-shaped two-cylinder piston engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112096475A true CN112096475A (en) | 2020-12-18 |
| CN112096475B CN112096475B (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011008248.4A Active CN112096475B (en) | 2020-09-23 | 2020-09-23 | Hydraulic tappet anti-rotation structure and V-shaped two-cylinder piston engine |
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| Country | Link |
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| CN (1) | CN112096475B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338562A (en) * | 2000-08-11 | 2002-03-06 | 马自达汽车株式会社 | Valve activator of motor |
| CN207554136U (en) * | 2017-11-14 | 2018-06-29 | 潍柴动力股份有限公司 | A kind of engine and its anti-rotation roller tappet |
| CN110847994A (en) * | 2019-11-27 | 2020-02-28 | 重庆隆鑫机车有限公司 | Tappet with oil guide function, valve actuating mechanism and engine |
| CN210370825U (en) * | 2019-08-20 | 2020-04-21 | 绵阳富乐源机械科技有限公司 | Novel hydraulic tappet |
-
2020
- 2020-09-23 CN CN202011008248.4A patent/CN112096475B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338562A (en) * | 2000-08-11 | 2002-03-06 | 马自达汽车株式会社 | Valve activator of motor |
| CN207554136U (en) * | 2017-11-14 | 2018-06-29 | 潍柴动力股份有限公司 | A kind of engine and its anti-rotation roller tappet |
| CN210370825U (en) * | 2019-08-20 | 2020-04-21 | 绵阳富乐源机械科技有限公司 | Novel hydraulic tappet |
| CN110847994A (en) * | 2019-11-27 | 2020-02-28 | 重庆隆鑫机车有限公司 | Tappet with oil guide function, valve actuating mechanism and engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112096475B (en) | 2022-01-07 |
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