CN109779717B - Compact fixed driving pivot - Google Patents
Compact fixed driving pivot Download PDFInfo
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- CN109779717B CN109779717B CN201910236846.8A CN201910236846A CN109779717B CN 109779717 B CN109779717 B CN 109779717B CN 201910236846 A CN201910236846 A CN 201910236846A CN 109779717 B CN109779717 B CN 109779717B
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- 206010039203 Road traffic accident Diseases 0.000 description 2
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Abstract
A compact fixed driving pivot belongs to the field of variable valves, cylinder deactivation and braking of engines. The oil-gas-controlled oil-gas separator comprises a driving pin provided with a pin groove, a piston provided with a piston hole and a first air vent, a locking body, a fixing body provided with a fixing body groove, a controlled oil duct and a second air vent, a pin spring, a piston spring and a controlled oil cavity formed between the driving pin and the piston. The driving pin is installed in the piston, the piston is installed in the fixing body, the pin spring is installed between the driving pin and the piston, the piston spring is installed between the piston and the fixing body, and the controlled oil cavity is connected with the controlled oil channel. The invention realizes the reliable keeping and flexible switching of the working state and the failure state of the driving fulcrum by controlling the oil pressure of the controlled oil duct. The size of the driving fulcrum is greatly reduced, particularly the radial size, and the driving fulcrum is suitable for applying new technology to an engine with a small cylinder center distance, particularly the application of two-stroke braking technology, the application of cylinder stopping technology on a single-camshaft V-shaped engine and the like.
Description
Technical Field
The invention relates to a compact fixed driving fulcrum, and belongs to the field of variable valve, cylinder deactivation and braking of an engine.
Background
The road long slope and the steep slope are numerous in China, the load of a truck is higher than the foreign standard, the overload and overspeed problems of the truck are serious, the truck responsibility road traffic accidents in China are frequent, and the super dangerous traffic accidents are mainly caused by large trucks. The main driving system and the electromagnetic type and eddy current type transmission system retarders have the problems that the driving power is easily and rapidly reduced due to overheating after long-time work, and the like, and the engine braking technology is concerned. Compared with four-stroke braking such as exhaust braking and pressure reduction driving, the braking power of two-stroke driving is large, and the trend of future development is. In addition, the engine cylinder deactivation technology can effectively reduce the oil consumption and the emission of the vehicle. The technologies of cylinder deactivation, two-stroke braking and the like all need to adopt a variable valve mechanism.
For the compact engine with small cylinder center distance, the space arrangement is one of the key and difficult points for designing the variable valve mechanism, such as the application of two-stroke braking technology, the application of single-camshaft V-type engine cylinder deactivation technology and the like. Therefore, a set of more safe and reliable compact fixed driving pivot is imperative to develop.
Disclosure of Invention
The invention aims to: by designing a compact fixed driving fulcrum, the method is used for realizing that: (a) in order to improve the fuel economy, the emission performance and the driving safety of a vehicle, a fixed driving fulcrum is required to have an operating state and a failure state, and the reliable keeping and the flexible switching of the two states can be realized. (b) In order to meet the arrangement of the engine with a small cylinder center distance, the driving fulcrum is required to be compact in structure.
The technical scheme adopted by the invention is as follows: a compact fixed driving pivot comprises a driving pin provided with a pin slot, a piston provided with a piston hole and a first air release hole, a locking body, a fixing body provided with a fixing body slot, a controlled oil duct and a second air release hole, a pin spring and a piston spring. The piston comprises at least a piston body and an insert, which are mounted in one piece. The driving pin is arranged in the piston, the piston is arranged in the fixed body, the pin spring is arranged between the driving pin and the piston, the piston spring is arranged between the piston and the fixed body, a controlled oil cavity is formed between the driving pin and the piston, and the controlled oil cavity is connected with the controlled oil channel.
When the control unit controls the driving fulcrum to be in a working state, the controlled oil duct is in a low-pressure state, and the locking body is positioned in the piston hole and the fixing body groove.
When the control unit controls the driving fulcrum to be in a failure state, the controlled oil duct is in a high-pressure state, and the locking body is located in the piston hole and the pin groove.
The fixed body is a fixed body commonly used in the field, such as a fixed part like a cylinder cover and a bracket fixed relative to the cylinder cover, and a movable part like a rocker arm body. The further fixed body can adopt the fixed body of integral type and split type fixed body, and the split type fixed body includes split type bush and fixed body overcoat.
The locking body is a locking body commonly used in the field for realizing switching and locking functions, such as a sphere, a circular truncated cone or a cone, a spherical body, a cambered surface body and the like at two ends, a cylinder and the like in the middle and the like, and inclined planes can be manufactured at two ends to ensure good stress.
A working method of a compact fixed driving fulcrum comprises the following steps:
when the control unit controls the driving fulcrum to be in a working state, the controlled oil duct is in a low-pressure state, the locking body is positioned in the piston hole and the fixing body groove, and the piston and the fixing body are locked into a whole;
when the control unit controls the driving fulcrum to be in a failure state, the controlled oil duct is in a high-pressure state, the locking body is positioned in the piston hole and the pin groove, and the piston and the driving pin are locked into a whole and move relative to the fixing body;
when the control unit controls the driving fulcrum to switch from a working state to a failure state, the controlled oil passage is switched into a high-pressure state from a low-pressure state, the driving pin firstly compresses the pin spring to move inwards relative to the piston under the pushing of oil pressure until the pin groove on the driving pin moves to the position of the locking body, the locking body is pushed into the piston hole and the pin groove under the action of the valve spring or the piston spring, and the locking body locks the piston and the driving pin into a whole and moves relative to the fixing body;
when the control unit controls the driving fulcrum to switch from the failure state to the working state, the controlled oil duct is switched to a low-pressure state from a high-pressure state, the driving pin, the locking body, the pin spring and the piston move in a reciprocating mode relative to the fixed body under the action of the piston spring, when the locking body moves to the position of the fixed body groove, the driving pin moves outwards relative to the piston under the action of the spring force of the pin spring, the locking body is pushed into the piston hole and the fixed body groove, and the piston and the fixed body are locked into a whole by the locking body.
The invention has the beneficial effects that: the compact fixed driving fulcrum mainly comprises a driving pin with a pin slot, a piston with a piston hole and a first air release hole, a locking body, a fixed body with a fixed body slot, a controlled oil duct and a second air release hole, a pin spring, a piston spring and a controlled oil cavity formed between the driving pin and the piston. (a) By controlling the oil pressure of the controlled oil passage, the reliable keeping and flexible switching of the working state and the failure state of the driving fulcrum are realized, the method can be used for realizing the cylinder deactivation technology, the two-stroke braking technology and the like of the engine, and the fuel economy, the emission performance and the driving safety of the vehicle are improved. (b) The invention greatly reduces the size, particularly the radial size, of the driving pivot, is favorable for the arrangement on an engine with small cylinder center distance, particularly the application of a two-stroke braking technology, the application of a cylinder stopping technology on a single-camshaft V-shaped engine and the like.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic view of a driving fulcrum in an operating state of embodiment 1.
Fig. 2 is a schematic view of the driving fulcrum in the failure state of embodiment 1.
Fig. 3 is a schematic view of the driving fulcrum in an operating state of embodiment 2.
In the figure: 1. a drive pin; 11. a pin slot; 21. a piston bore; 22. a first air bleed hole; 23. a controlled oil chamber; 2a, a piston body, 2b, a plug; 3. a locking body; 4a, an integrated fixing body; 4b, split type bush; 4c, fixing the body coat; 41. a fixed body slot; 42. a second vent hole; 5. a pin spring; 6. a piston spring; 7. a controlled oil passage; 8. and a collar.
Detailed Description
The invention relates to a compact fixed driving fulcrum. The locking device comprises a driving pin 1 provided with a pin groove 11, a piston provided with a piston hole 21 and a first air vent hole 22, a locking body 3, a fixing body provided with a fixing body groove 41, a controlled oil passage 7 and a second air vent hole 42, a pin spring 5 and a piston spring 6. The piston comprises at least a piston body and an insert, which are mounted in one piece.
Example 1
Fig. 1 and 2 are schematic views of a first embodiment of a drive fulcrum in an operating state and a failure state, respectively. It comprises a driving pin 1 provided with a pin slot 11, a piston provided with a piston hole 21 and a first air release hole 22, a locking body 3, a fixed body, a pin spring 5 and a piston spring 6. The piston comprises at least a piston body 2a and an obstruction piece 2b, the piston body 2a and the obstruction piece 2b being mounted in one piece. The driving pin 1 is arranged in the piston, the piston is arranged in the fixed body, the pin spring 5 is arranged between the driving pin 1 and the piston, the piston spring 6 is arranged between the piston and the fixed body, a controlled oil cavity 23 is formed between the driving pin 1 and the piston, and the controlled oil cavity 23 is connected with the controlled oil channel 7. The stationary body in fig. 1 and 2 is of an integrated structure, and the stationary body groove 41, the controlled oil passage 7, and the second air bleeding hole 42 are provided directly on the integrated stationary body 4 a. The locking body 3 is a sphere. In addition, a collar 8 can be added to define the position of the piston, depending on the engine requirements.
Example 2
Fig. 3 is a schematic view of a second embodiment of the driving fulcrum in an operating state. The device comprises a driving pin 1 provided with a pin groove 11, a piston provided with a piston hole and a first air vent 22, a locking body 3, a fixing body provided with a fixing body groove, a controlled oil duct 7 and a second air vent, a pin spring 5 and a piston spring 6. The piston comprises at least a piston body and an insert, which are mounted in one piece. The driving pin 1 is arranged in the piston, the piston is arranged in the fixed body, the pin spring 5 is arranged between the driving pin 1 and the piston, the piston spring 6 is arranged between the piston and the fixed body, and a controlled oil cavity 23 is formed between the driving pin 1 and the piston. The fixing body adopts a split fixing body, the split bushing 4b is fixedly arranged on a fixing body outer sleeve 4c, the fixing body groove is arranged on the split bushing 4b, and the controlled oil duct 7 is led out from the fixing body outer sleeve 4c and is connected with the controlled oil cavity 23 through the split bushing 4 b. The locking body adopts a structure with spherical bodies at two ends and a cylinder in the middle.
The working principle of the driving fulcrum is as follows:
when the control unit controls the driving fulcrum to be in a working state, the controlled oil passage 7 is in a low-pressure state, the locking body 3 is positioned in the piston hole 21 and the fixing body groove 41, and the piston and the fixing body are locked into a whole.
When the control unit controls the driving fulcrum to be in a failure state, the controlled oil passage 7 is in a high-pressure state, the locking body 3 is positioned in the piston hole 21 and the pin groove 11, and the piston and the driving pin 1 are locked into a whole and can move relative to the fixed body.
When the control unit controls the driving fulcrum to switch from the working state to the failure state, the controlled oil passage 7 is switched to a high-pressure state from a low-pressure state, the driving pin 1 firstly compresses the pin spring 5 to move inwards relative to the piston under the pushing of oil pressure until the pin groove 11 on the driving pin 1 moves to the position of the locking body 3, the locking body 3 is pushed into the piston hole 21 and the pin groove 11 under the action of the valve spring or the piston spring, and the locking body 3 locks the piston and the driving pin 1 into a whole and can move relative to the fixed body.
When the control unit controls the driving fulcrum to be switched from the failure state to the working state, the controlled oil duct 7 is switched into a low-pressure state from a high-pressure state, and the driving pin 1, the locking body 3, the pin spring 5 and the piston move in a reciprocating mode relative to the fixed body under the action of the piston spring 6. When the locking body 3 moves to the position of the fixing body groove 41, the locking body 3 is pushed into the piston hole 21 and the fixing body groove 41 by the spring force of the pin spring 5, and the locking body 3 locks the piston and the fixing body as one body.
Claims (2)
1. A compact fixed drive fulcrum, characterized by: the device comprises a driving pin (1) provided with a pin groove (11), a piston provided with a piston hole (21) and a first air vent (22), a locking body (3), a fixing body provided with a fixing body groove (41), a controlled oil passage (7) and a second air vent (42), a pin spring (5) and a piston spring (6);
the piston at least comprises a piston body and a block, and the piston body and the block are installed into a whole;
the driving pin (1) is installed in the piston, the piston is installed in the fixing body, the pin spring (5) is installed between the driving pin (1) and the piston, the piston spring (6) is installed between the piston and the fixing body, a controlled oil cavity (23) is formed between the driving pin (1) and the piston, and the controlled oil cavity (23) is connected with the controlled oil channel (7) through the side wall surface of the piston; the pin spring (5) and the piston spring (6) are respectively arranged at two sides of the driving pin (1); one end of the pin spring (5) acts on the piston, and the other end of the pin spring (5) acts on the driving pin (1); one end of a piston spring (6) acts on the blocking block, and the other end of the piston spring acts on the integrated fixed body (4a) or the split type bushing (4 b);
when the control unit controls the driving fulcrum to be in a working state, the controlled oil duct (7) is in a low-pressure state, and the locking body (3) is positioned in the piston hole (21) and the fixing body groove (41);
when the control unit controls the driving fulcrum to be in a failure state, the controlled oil duct (7) is in a high-pressure state, and the locking body (3) is located in the piston hole (21) and the pin groove (11).
2. The method of claim 1, wherein the method comprises the steps of:
when the control unit controls the driving fulcrum to be in a working state, the controlled oil duct (7) is in a low-pressure state, the locking body (3) is positioned in the piston hole (21) and the fixing body groove (41), and the piston and the fixing body are locked into a whole;
when the control unit controls the driving fulcrum to be in a failure state, the controlled oil duct (7) is in a high-pressure state, the locking body (3) is positioned in the piston hole (21) and the pin groove (11), and the piston and the driving pin (1) are locked into a whole and move relative to the fixing body;
when the control unit controls the driving fulcrum to be switched from a working state to a failure state, the controlled oil duct (7) is switched into a high-pressure state from a low-pressure state, the driving pin (1) firstly compresses the pin spring (5) to move inwards relative to the piston under the pushing of oil pressure until the pin groove (11) on the driving pin (1) moves to the position of the locking body (3), the locking body (3) is pushed into the piston hole (21) and the pin groove (11) under the action of the valve spring or the piston spring, and the piston and the driving pin (1) are locked into a whole by the locking body (3) and move relative to the fixing body;
when the control unit controls the driving fulcrum to be switched from the failure state to the working state, the controlled oil duct (7) is switched to a low-pressure state from a high-pressure state, the driving pin (1), the locking body (3), the pin spring (5) and the piston move in a reciprocating mode relative to the fixed body under the action of the piston spring (6), when the locking body (3) moves to the position of the fixed body groove (41), the driving pin (1) moves outwards relative to the piston under the action of the spring force of the pin spring (5), the locking body (3) is pushed into the piston hole (21) and the fixed body groove (41), and the piston and the fixed body are locked into a whole through the locking body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910236846.8A CN109779717B (en) | 2019-03-27 | 2019-03-27 | Compact fixed driving pivot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910236846.8A CN109779717B (en) | 2019-03-27 | 2019-03-27 | Compact fixed driving pivot |
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| Publication Number | Publication Date |
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| CN109779717A CN109779717A (en) | 2019-05-21 |
| CN109779717B true CN109779717B (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910236846.8A Active CN109779717B (en) | 2019-03-27 | 2019-03-27 | Compact fixed driving pivot |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1857642A1 (en) * | 2006-05-19 | 2007-11-21 | Mechadyne plc | Valve actuating mechanism |
| CN204961000U (en) * | 2012-09-24 | 2016-01-13 | 雅各布斯车辆***公司 | Integrated dynamic formula rocking arm stopper system of losing with automatic re -setting |
| CN105275528A (en) * | 2014-07-15 | 2016-01-27 | 雅各布斯车辆***公司 | Lost motion valve actuation systems with locking elements including wedge locking elements |
| CN107484421A (en) * | 2014-09-17 | 2017-12-15 | 日锻汽门株式会社 | The application method of hydraulic type clearance adjuster and hydraulic type clearance adjuster |
-
2019
- 2019-03-27 CN CN201910236846.8A patent/CN109779717B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1857642A1 (en) * | 2006-05-19 | 2007-11-21 | Mechadyne plc | Valve actuating mechanism |
| CN204961000U (en) * | 2012-09-24 | 2016-01-13 | 雅各布斯车辆***公司 | Integrated dynamic formula rocking arm stopper system of losing with automatic re -setting |
| CN105275528A (en) * | 2014-07-15 | 2016-01-27 | 雅各布斯车辆***公司 | Lost motion valve actuation systems with locking elements including wedge locking elements |
| CN107484421A (en) * | 2014-09-17 | 2017-12-15 | 日锻汽门株式会社 | The application method of hydraulic type clearance adjuster and hydraulic type clearance adjuster |
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| CN109779717A (en) | 2019-05-21 |
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