CN206522166U - A kind of gear rod engine brake mechanism - Google Patents
A kind of gear rod engine brake mechanism Download PDFInfo
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- CN206522166U CN206522166U CN201621476030.0U CN201621476030U CN206522166U CN 206522166 U CN206522166 U CN 206522166U CN 201621476030 U CN201621476030 U CN 201621476030U CN 206522166 U CN206522166 U CN 206522166U
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- cam
- ratch
- braking
- interior
- spool
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Abstract
The utility model discloses a kind of gear rod engine brake mechanism, there is rocker arm shaft; there is main oil gallery and braking oil duct; there is ratch in ratch hole in rocker arm shaft; ratch bore portion is located in cam storehouse; there is cam in cam storehouse; cam is provided with return spring; there is the tooth coordinated with ratch; spool is additionally provided with rocker body on cam in axis hole; cam rotation can eject spool, spool can extrude braking valve jacking block after cam force, and braking valve jacking block can deflate after being pressurized.Compared with prior art, the utility model is opened braking exhaust valve using the mechanical brake mechanism of gear rod and realizes engine braking function, braking power can be higher compared to hydraulic brake, particularly under speed operation, and braking power advantage becomes apparent from.Meanwhile, mechanical brake is influenceed smaller by Engine Oil Cleanliness, and its reliability is higher, and fault rate is lower.
Description
Technical field
The utility model is related to a kind of engine brake mechanism, particularly a kind of gear rod engine brake machine
Structure, belongs to the accurate accessory field of vehicle, relates generally to engine art.
Background technology
In recent years, with the fast development of heavy-duty commercial vehicle, engine braking has also been obtained more and more in practice
Using.But current available engine braking technology uses hydraulic engine brake.I.e.：Pass through a set of hydraulic control
Device, using " jack " principle of the Incoercibility of machine oil, to control opening and the closing of braking exhaust valve.But due to liquid
Press system parts many, requirement on machining accuracy is high, and control system is complicated, is influenceed larger by Engine Oil Cleanliness, therefore reliably
Property is relatively low, and fault rate is higher.Meanwhile, engine is influenceed under speed operation, by engine oil pressure is relatively low, and actual braking valve is opened
Open lift meeting relative theory design lift to reduce, and cause the braking power value under speed operation to reduce, finally influence whether
Using effect of the vehicle to engine braking.
Utility model content
The utility model technical issues that need to address are to be directed to above-mentioned the deficiencies in the prior art, and provide one kind and pass through tooth
Take turns the engine brake mechanism of ratch transmission.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
It is provided with a kind of gear rod engine brake mechanism, including rocker body, the rocker body interconnected
Axis hole, ratch hole and cam storehouse, there is in the axis hole rocker arm shaft, rocker arm shaft in axis hole relative to rocker body rotation activity,
Having in rocker arm shaft on interconnected main oil gallery and braking oil duct, the braking oil duct has the oil supply oil duct for leading to axis hole,
There is ratch, ratch is in axial direction movable in ratch hole, and the ratch bore portion is located in cam storehouse in the ratch hole,
There is cam, cam rotation activity in cam storehouse, cam, which is provided with return spring, cam, to be had and tooth in cam storehouse
Being additionally provided with the tooth that bar coordinates, the rocker body outside spool, rocker body has air valve bridge, has on the air valve bridge
Braking valve jacking block, the spool is set close to braking valve jacking block, and the cam rotation can eject spool, described
Spool can extrude braking valve jacking block after cam force, and braking valve jacking block can deflate after being pressurized.
As further preferred scheme, pressure ball seat mechanism, the pressure ball seat mechanism are provided with outside the air valve bridge
Connecting rocker arm body.
As further preferred scheme, the ratch is fitted close with ratch hole, ratch under the promotion of oil pressure
It is movable in ratch hole.
Having as further preferred scheme, in the cam storehouse prevents the excessive spacer pin of cam carryover.
As further preferred scheme, the main oil gallery is oily to braking oil duct conveyer by solenoid valve control.
Beneficial effect：
Compared with prior art, a kind of gear rod engine brake mechanism of the present utility model, engine is made
For a kind of mode of braking of vehicle, especially by cut-out engine fuel, make engine piston at the end of compression stroke or connect
The braking valve jacking block on air valve bridge is opened at the end of near, high temperature and high pressure gas in cylinder are discharged.Then quick closedown is arranged again
Valve, makes high temperature and high pressure gas energy not return again on the piston of expansion stroke, so that engine does negative work always, to play
Slow down the effect of car speed, and braking exhaust valve is opened using the mechanical brake mechanism of gear rod and realized
Engine braking function, the device has the advantages that above-mentioned mechanical brake, and braking power can be more compared to hydraulic brake
Under height, particularly speed operation, braking power advantage becomes apparent from.Meanwhile, mechanical brake is influenceed smaller by Engine Oil Cleanliness,
Its reliability is higher, and fault rate is lower.
Brief description of the drawings
Fig. 1 is the structural representation of single valve actuation closed mode；
Fig. 2 is the structural representation of single valve actuation opening；
Fig. 3 is the structural representation of dual valve braking；
Fig. 4 is the structural representation of single, double valve composite braking；
Wherein, 1- rocker bodies, 2- axis holes, 3- ratch hole, 4- cams storehouse, 5- rocker arm shafts, 6- main oil gallerys, 7- braking oil ducts,
8- oil supply oil ducts, 9- ratch, 10- cams, 11- return springs, 12- spools, 13- air valve bridges, 14- braking valve jacking blocks,
15- pressure ball seat mechanisms.
Embodiment
Describe optimal technical scheme of the present utility model in detail below in conjunction with the accompanying drawings.
As illustrated, a kind of gear rod engine brake mechanism of the present utility model, including rocker body 1, it is described
Interconnected axis hole 2, ratch hole 3 and cam storehouse 4 are provided with rocker body 1；
There is rocker arm shaft 5, rocker arm shaft 5 is in axis hole 2 in the rotation activity of rocker body 1, rocker arm shaft 5 in the axis hole 2
With interconnected main oil gallery 6 and braking oil duct 7, there is the oil supply oil duct 8 for leading to axis hole 2, axis hole on the braking oil duct 7
2 be crescent moon slot structure with the junction of oil supply oil duct 8, it is ensured that oil supply oil duct 8 can be more more longlasting into ratch hole 3
Machine oil is injected, the main oil gallery 6 conveys machine oil by solenoid valve control to braking oil duct 7；
There is ratch 9, ratch 9 is in axial direction movable in ratch hole 3, the part of ratch hole 3 in the ratch hole 3
In cam storehouse 4；
There is cam 10, the cam 10 rotation activity in cam storehouse 4, cam 10 is provided with return bullet in cam storehouse 4
Having in spring 11, the cam storehouse 4 prevents thering is the tooth coordinated with ratch 9 on the excessive spacer pin of the carryover of cam 10, cam 10,
The ratch 9 is fitted close with ratch hole 3, and ratch 9 is movable in ratch hole 3 under the promotion of oil pressure, in the rocker body 1 also
The gear being provided with spool 12, cam 10 and the tooth-shape structure engaged using involute of ratch 9, bearing load is more
Greatly, better reliability, and manufacturing process is ripe, and manufacturing cost is low, and the scheme is started using compression release braking principle
Machine camshaft, have on the cam of engine cam part molded line be for control braking when exhaust valve opening and closing.
As the outside of Fig. 1 rocker bodies 1 has there is braking valve jacking block 14, the spool 12 on air valve bridge 13, the air valve bridge 13
Set close to braking valve jacking block 14, the cam 10, which is rotated, can eject spool 12, and the spool 12 is in cam 10
Braking valve jacking block 14 is can extrude after force, braking valve jacking block 14 can deflate after being pressurized；
In brake device structure design details, spool 12 is realized with the mating structure of rocker body 1：In on-position
When stress is carried by arrestment mechanism；And in non-brake state, the functional objective of stress is carried by rocker body 1（System
Moving cam 10 leaves safety clearance with spool 12）.The mechanism is effectively reduced brake apparatus when engine is normally run
The work frequency, the service life and reliability of brake apparatus can be lifted conscientiously.（I.e.：If user is without using braking function
When, engine will not be influenceed by any of arrestment mechanism）.
Pressure ball seat mechanism 15, the connecting rocker arm body 1 of pressure ball seat mechanism 15, conventional are provided with outside the air valve bridge 13
It is that air valve bridge 13 is pressed by pressure ball seat mechanism 15, realizes and deflate, and is employed in Fig. 1 to one on air valve bridge 13
Valve jacking block 14 carries out extruding deflation；
Such as Fig. 1 and Fig. 2, in use, main oil gallery 6 injects machine oil under the control of magnetic valve to braking oil duct 7, machine oil passes through
Oil supply oil duct 8 is to the oiling of ratch hole 3, and the oil pressure of machine oil promotes the activity of ratch 9, and ratch 9 is rotated with moving cam 10, cam 10 it is convex
A contact spool 12 is played, spool 12 is ejected, extruded when the cam of camshaft turns to " braking peach point " position
The deflation to cylinder is realized after braking valve jacking block 14, the cam of camshaft is rotated further, turned over after " braking peach point ", spool
12 just no longer extrude valve jacking block 14, and steps of exhausting can stop immediately, and engine piston, which continues to move downward, does negative work, so that real
Existing engine braking；
When that need not brake, cam 10 is under the control of return spring 11, and opposite direction is rotated, and drives ratch 9 to negative side
Squeezed to activity, and then by the machine oil in ratch hole 3 back to oil duct 8, return braking oil duct 7 and magnetic valve draining oil duct, and
Flowed out through magnetic valve draining oil duct, while the return of spool 12, opens it, engine braking so that exhaust valve will not be acted on
It will not be operated；
Braking valve jacking block 14 is installed on the air valve bridge 13 of the embodiment, can be only by manipulating braking valve jacking block 14
Open a valve.
Simply a valve on air valve bridge 13 is exhausted for the embodiment, and the single gas can be disposably opened completely
Door.
Such as Fig. 3, the embodiment is braked for dual valve, i.e.,：Control two braking valves.
Spool 12 is acted directly on air valve bridge 13, specifically, spool 12 is acted on pressure ball seat, at least may be used
Disposably to be opened to two valves, at least two valves can be carried out semi-open.
As shown in figure 4, the embodiment is single, double valve composite braking, i.e.,：A valve and two braking gas are realized simultaneously
The unlatching control of door.
Being provided with cam storehouse 4 between two cams 10, two cams 10 has gear, has return spring on the gear
11, the activity of ratch 9 drives one of cam 10, and the cam 10, which is rotated, directly drives said gear and another cam 10
Together rotate, two cams 10 are respectively acting on a spool 12, one of spool 12 is acted on pressure ball seat,
At least two valves can disposably be opened, be at least two valves semi-open by pressure ball seat extruding air valve bridge 13
State, and another spool 12 is acted directly on the laterostigmatal braking valve jacking block 14 of air valve bridge 13 1, can be right
Single valve carries out complete opening operation, and the capacity of the embodiment is bigger, and exhaust velocity is faster.
The utility model can be used for single valve actuation, dual valve braking and single valve and dual valve composite braking etc. three simultaneously
Plant operating mode.
It is described above, only the application preferably embodiment, but the protection domain of the application is not limited thereto,
Any one skilled in the art is in the technical scope that the application is disclosed, the change or replacement that can be readily occurred in,
It should all cover within the protection domain of the application.Therefore, the protection domain of the application should be with scope of the claims
It is defined.
Claims (5)
1. a kind of gear rod engine brake mechanism, it is characterised in that：Including rocker body（1）, the rocker body（1）It is interior
It is provided with interconnected axis hole（2）, ratch hole（3）With cam storehouse（4）, the axis hole（2）It is interior that there is rocker arm shaft（5）, rocking arm
Axle（5）In axis hole（2）Interior relative rocker body（1）Rotation activity, rocker arm shaft（5）It is interior that there is interconnected main oil gallery（6）And system
Dynamic oil duct（7）, the braking oil duct（7）Above have and lead to axis hole（2）Oil supply oil duct（8）, the ratch hole（3）It is interior that there is tooth
Bar（9）, ratch（9）In ratch hole（3）It is inside in axial direction movable, the ratch hole（3）Part is located at cam storehouse（4）It is interior, it is convex
Take turns storehouse（4）It is interior that there is cam（10）, the cam（10）In cam storehouse（4）Interior rotation activity, cam（10）It is provided with return bullet
Spring（11）, cam（10）On have and ratch（9）The tooth of cooperation, the rocker body（1）On be additionally provided with spool（12）, shake
Arm body（1）Outside has air valve bridge（13）, the air valve bridge（13）It is upper that there is braking valve jacking block（14）, the spool
（12）Close to braking valve jacking block（14）Set, the cam（10）Rotation can eject spool（12）, the spool
（12）In cam（10）Braking valve jacking block is can extrude after force（14）, braking valve jacking block（14）It can be deflated after compression.
2. a kind of gear rod engine brake mechanism according to claim 1, it is characterised in that：The air valve bridge
（13）Outside is provided with pressure ball seat mechanism（15）, the pressure ball seat mechanism（15）Connecting rocker arm body（1）.
3. a kind of gear rod engine brake mechanism according to claim 1, it is characterised in that：The ratch
（9）With ratch hole（3）It is fitted close, ratch（9）In ratch hole under the promotion of oil pressure（3）Interior activity.
4. a kind of gear rod engine brake mechanism according to claim 1, it is characterised in that：The cam storehouse
（4）It is interior have prevent cam（10）The excessive spacer pin of carryover.
5. a kind of gear rod engine brake mechanism according to claim 1, it is characterised in that：The main oil gallery
（6）By solenoid valve control to braking oil duct（7）Convey machine oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621476030.0U CN206522166U (en) | 2016-12-30 | 2016-12-30 | A kind of gear rod engine brake mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621476030.0U CN206522166U (en) | 2016-12-30 | 2016-12-30 | A kind of gear rod engine brake mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206522166U true CN206522166U (en) | 2017-09-26 |
Family
ID=59888877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621476030.0U Active CN206522166U (en) | 2016-12-30 | 2016-12-30 | A kind of gear rod engine brake mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN206522166U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762013A (en) * | 2016-12-30 | 2017-05-31 | 中国第汽车股份有限公司 | A kind of gear rod engine brake mechanism |
| CN110173314A (en) * | 2019-05-15 | 2019-08-27 | 浙江大学 | A kind of air valve bridge and its exhaust brake method of achievable compression-release type engine braking |
-
2016
- 2016-12-30 CN CN201621476030.0U patent/CN206522166U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762013A (en) * | 2016-12-30 | 2017-05-31 | 中国第汽车股份有限公司 | A kind of gear rod engine brake mechanism |
| CN110173314A (en) * | 2019-05-15 | 2019-08-27 | 浙江大学 | A kind of air valve bridge and its exhaust brake method of achievable compression-release type engine braking |
| CN110173314B (en) * | 2019-05-15 | 2023-07-18 | 浙江大学 | Valve bridge capable of realizing compression release type engine braking and exhaust braking method thereof |
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