CN207864059U - A kind of engine braking executing agency - Google Patents
A kind of engine braking executing agency Download PDFInfo
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- CN207864059U CN207864059U CN201721769828.9U CN201721769828U CN207864059U CN 207864059 U CN207864059 U CN 207864059U CN 201721769828 U CN201721769828 U CN 201721769828U CN 207864059 U CN207864059 U CN 207864059U
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Abstract
A kind of engine braking executing agency, piston is executed including braking inner cavity and its internal braking being arranged, adjustment bolt, brake piston spring, clamp spring, one end of adjustment bolt is connected with locking nut, No.1 card slot is provided on the outer wall of the other end of adjustment bolt, it is provided with No. two card slots on the inner wall of braking execution piston, the bottom that braking executes piston is provided with brake piston spring, the inside line of clamp spring is in No.1 card slot, the outside portion of clamp spring is fixed in No. two card slots, braking inner cavity is communicated with brake circuit, one end that braking executes the air valve yoke being arranged below piston is connected with No.1 valve, the other end of air valve yoke is set on brake pushrod, one end of brake pushrod is connected with No. two valves, the other end of brake pushrod and the braking right over it are formed with valve clearance between executing piston.The design is not only simple in structure, brake clearance is regulated the speed soon, braking distance is controllable, and valve control is flexible, easy to operate.
Description
Technical field
The utility model is related to a kind of engine braking control devices, belong to vehicle engine braking technical field, especially
It is related to a kind of engine braking executing agency, is primarily adapted for use in simplified structure, raising brake clearance is regulated the speed, realizes braking row
Journey is controllable.
Background technology
The oil circuit control mechanism of brake rocker arm and executing agency are with the VEB systems of the dedicated rocker arm system and VOLVO that can all win
It unites more mature, brake circuit control mechanism is substantially, it can be achieved that in damped condition based on the one-way valve structures under damped condition
The formation of lower high-voltage oil cavity and locked；The domestic method controlled especially using simple electromagnetic valve switch and draining along braking.No
Same brake actuator determines the difference of oil circuit control mechanism, and for brake actuator, General Principle is engine oil pressure
Coordinate spring force or so, mode of the brake piston in different location is made to realize the system of engine under different engine oil pressures
It is dynamic to open and close, coordinate corresponding oil route controller or Unloading Device to ensure that braking executes displacement and the stability of piston
Or ensured by structural relation.Most of brake circuit control mechanisms and executing agency are complicated at this stage, manufacturing cost
It is high.
Chinese patent, application publication number CN106968753A, data of publication of application are the disclosure of the invention on July 21st, 2017
A kind of brake actuator for engine braking oil path, including arrester and the braking oil pocket, the adjustment spiral shell that are arranged inside
Bolt, ball valve, ball valve spring, ball valve spring base, tripping spring and brake piston, the tripping spring that ball valve spring base outside is set with
Outer cover is equipped with the brake piston that slides up and down of inner wall along arrester, the connection of brake piston bottom as ball-and-socket in foot bottom
Valve clearance is formed between air valve yoke.Although the invention good braking effect, stability are stronger, it still has following lack
It falls into：The invention first unclamps adjusting nut when valve clearance adjusts, then the height to adjustment bolt in vertical direction is adjusted
It is whole, the distance between ball-and-socket and air valve yoke are then adjusted, adjustment finishes, then tightens adjusting nut to lock adjustment bolt, in this way
Design it is not only complicated, but also need adjust adjustment bolt vertical direction height, adjustment ball-and-socket and air valve yoke between
Distance so that brake clearance is regulated the speed, and slow, braking distance is uncontrollable.
Invention content
It regulates the speed slow, system the purpose of the utility model is to overcome complicated, brake clearance existing in the prior art
The dynamic uncontrollable defect of stroke and problem provide a kind of simple in structure, brake clearance and regulate the speed hair fast, that braking distance is controllable
Motivation brake actuator.
In order to achieve the above object, the technical solution of the utility model is：A kind of engine braking executing agency, including
The braking inner cavity of rocking arm and its internal braking being arranged execute piston, adjustment bolt, the braking inner cavity and the system in rocking arm
Dynamic oil circuit communicates, and the braking executes and is provided with air valve yoke below piston, and No.1 valve, No. two gas are provided on air valve yoke
Door；
The engine braking executing agency further includes brake piston spring, clamp spring, and one end of the adjustment bolt is successively
It is connected with the locking nut outside rocking arm after drawing-in braking inner cavity, rocking arm, is arranged on the outer wall of the other end of adjustment bolt
There are No.1 card slot, the braking to execute piston and be provided with No. two card slots on the inner wall of one end of adjustment bolt, braking executes
It is located at the position below braking inner cavity on the bottom of piston and is provided with brake piston spring, the inside line of the clamp spring is in No.1
In card slot, the outside portion of clamp spring is fixed in No. two card slots.
The height of the No.1 card slot is equal to the path increment that braking executes piston.
The engine braking executing agency further includes brake pushrod, and one end of the air valve yoke is connected with No.1 valve
It connects, the other end of air valve yoke is set on brake pushrod, and one end of the brake pushrod is connected with No. two valves, brake pushrod
The other end and braking right over it execute piston between be formed with valve clearance, the brake pushrod is along air valve yoke
Lower slider.
The brake pushrod is T-type structure, and brake pushrod includes No.1 interconnecting piece connected vertically and No. two interconnecting pieces, institute
State No.1 interconnecting piece, No. two interconnecting pieces are cylindrical structure, the diameter of No.1 interconnecting piece is less than the diameter of No. two interconnecting pieces, institute
It states air valve yoke to be set on No.1 interconnecting piece, one end setting of No. two interconnecting pieces far from No.1 interconnecting piece is fluted, No. two
Interconnecting piece is set in by groove on No. two valves.
The brake piston spring is piece type spring, and brake piston spring is fixed by screws on rocking arm.
The outer wall of the adjustment bolt and the endoporus of rocking arm are connected using fine thread, the outer wall and locking screw of adjustment bolt
Mother is using the threaded connection for connecting same size with the fine thread between adjustment bolt and rocking arm.
Compared with prior art, the beneficial effects of the utility model are：
1, one end of adjustment bolt is connected with locking nut in a kind of engine braking executing agency of the utility model, adjusts
It is provided with No.1 card slot on the outer wall of the other end of whole bolt, No. two cards are provided on the inner wall of one end of braking execution piston
Slot, the bottom that braking executes piston are provided with brake piston spring, and the inside line of clamp spring is in No.1 card slot, the outside of clamp spring
Portion is fixed in No. two card slots, and such design is not only simple in structure, and adjustment bolt executes piston with braking and passes through clamp spring
It realizes and connects and control the stroke that braking executes piston, adjusting nut can be by realizing gas with the fixed position relative of adjustment bolt
The adjustment in door gap.Therefore, the utility model is not only simple in structure, and brake clearance regulates the speed that fast, braking distance is controllable.
2, one end of air valve yoke is connected with No.1 valve in a kind of engine braking executing agency of the utility model, air valve
The other end of yoke is set on brake pushrod, and one end of brake pushrod is connected with No. two valves, the other end of brake pushrod with
Braking right over it is formed with valve clearance between executing piston, and brake pushrod is slided up and down along air valve yoke, in non-system
It starts building under condition, valve motion is driven by air valve yoke, and under damped condition, brake pushrod only drives the gas below brake pushrod
Door, it can be achieved that under damped condition braking valve motion under non-brake operating mode valve motion it is non-interference so that valve control
Flexibly, easy to operate；Brake pushrod is T-type structure, and brake pushrod includes No.1 interconnecting piece connected vertically and No. two interconnecting pieces,
Air valve yoke is set on No.1 interconnecting piece, and No. two interconnecting pieces are set in by groove on No. two valves, and not only assembly is simple, but also
Reliability is high.Therefore, not only valve control is flexible, easy to operate for the utility model, but also assembles simple, reliability height.
3, brake piston spring is piece type spring, brake piston bullet in a kind of engine braking executing agency of the utility model
Spring is fixed by screws on rocking arm, and brake piston spring acts on braking execution piston and ensures its initial position, and is braking
Active force is less than the active force that engine oil pressure executes braking in piston under operating mode, ensures that braking executes piston under damped condition
Movement, unfailing performance simple, at low cost, but also improving brake actuator is not only assembled using above-mentioned design；Adjust spiral shell
The outer wall of bolt and the endoporus of rocking arm are connected using fine thread, outer wall and the locking nut of adjustment bolt use with adjustment bolt with
The threaded connection of fine thread connection same size between rocking arm, further improves the unfailing performance of brake actuator.
Therefore, the utility model assembly is simple, at low cost, reliability is high.
Description of the drawings
Fig. 1 is the structural schematic diagram of special rocker-arm brake in the utility model.
Fig. 2 is the structural schematic diagram of brake actuator under non-brake operating mode in the utility model.
Fig. 3 is the structural schematic diagram of brake actuator under damped condition in the utility model.
Fig. 4 be in the utility model braking execute piston, adjustment bolt assembling schematic diagram.
In figure：Cam 1, exhaust rocker arm 2, air valve yoke 3, Rocker arm 4, braking inner cavity 41, brake circuit 42, rocker arm-braking oil circuit
43, rocker arm shaft braking connection oil circuit 44, rocker arm shaft braking working connection 45,5, No. two valves 6 of No.1 valve, braking execute piston 7,
Adjustment bolt 8, No.1 card slot 81, brake piston spring 9, clamp spring 10, locking nut 11, brake pushrod 12, No.1 interconnecting piece
121, No. two interconnecting pieces 122, valve clearance 13, oil circuit control mechanism 14, rocker arm shaft 15, roller 16, Roller Shaft 17, brake cam
18, screw 19.
Specific implementation mode
The utility model is described in further detail below in conjunction with description of the drawings and specific implementation mode.
Referring to Fig. 1 to Fig. 4, a kind of engine braking executing agency, including the braking inner cavity 41 of Rocker arm 4 and its inside set
The braking set executes piston 7, adjustment bolt 8, and the braking inner cavity 41 is communicated with the brake circuit 42 in Rocker arm 4, the braking
The lower section for executing piston 7 is provided with air valve yoke 3, and 5, No. two valves 6 of No.1 valve are provided on air valve yoke 3；
The engine braking executing agency further includes brake piston spring 9, clamp spring 10, one end of the adjustment bolt 8
It is connected successively with the locking nut 11 outside Rocker arm 4 after drawing-in braking inner cavity 41, Rocker arm 4, the other end of adjustment bolt 8
No.1 card slot 81 is provided on outer wall, the braking executes piston 7 and is provided with No. two on the inner wall of one end of adjustment bolt 8
Card slot, braking execute the position being located on the bottom of piston 7 below braking inner cavity 41 and are provided with brake piston spring 9, the card
In in No.1 card slot 81, the outside portion of clamp spring 10 is fixed in No. two card slots the inside line of spring 10.
The height of the No.1 card slot 81 is equal to the path increment that braking executes piston 7.
The engine braking executing agency further includes brake pushrod 12, one end and 5 phase of No.1 valve of the air valve yoke 3
Connection, the other end of air valve yoke 3 are set on brake pushrod 12, and one end of the brake pushrod 12 is connected with No. two valves 6,
The other end of brake pushrod 12 and the braking right over it are formed with valve clearance 13, the braking between executing piston 7
Push rod 12 is slided up and down along air valve yoke 3.
The brake pushrod 12 is T-type structure, and brake pushrod 12 includes No.1 interconnecting piece 121 connected vertically and No. two companies
Socket part 122,121, No. two interconnecting pieces 122 of the No.1 interconnecting piece are cylindrical structure, and the diameter of No.1 interconnecting piece 121 is less than
The diameter of No. two interconnecting pieces 122, the air valve yoke 3 are set on No.1 interconnecting piece 121, and No. two interconnecting pieces 122 are far from one
One end setting of number interconnecting piece 121 is fluted, and No. two interconnecting pieces 122 are set in by groove on No. two valves 6.
The brake piston spring 9 is piece type spring, and brake piston spring 9 is fixed on by screw 19 on Rocker arm 4.
The outer wall of the adjustment bolt 8 and the endoporus of Rocker arm 4 are connected using fine thread, the outer wall and lock of adjustment bolt 8
Tight nut 11 is using the threaded connection for connecting same size with the fine thread between adjustment bolt 8 and Rocker arm 4.
The principles of the present invention are described as follows：
Vehicle auxiliary slow speed device is a kind of complemental brake system, is a necessary complement of braking system, it is ensured that big
Type commercial car driving safety especially long slope descending when safety traffic.Engine cylinder inside brake is most rational auxiliary braking
Technology, since that it changes the working conditions of engine, from source（Engine）The brake force of towing astern is generated, therefore no matter from system
In terms of dynamic performance, energy consumption or cost, especially continuous braking ability, it is all substantially better than other complemental brake systems.
The design is related to the executing agency of a kind of compression dedicated rocker arm brake simple in structure, good reliability and mating
Engine brake correlation oil circuit and structure.Wherein executing agency has the advantages that the following：Facilitate adjustment；In brake release
Under state, original state need to be located at by executing piston, and will not be shifted one's position as rocking arm rotates；It, can be fast under in the braking state
Quick-action is made, and actuating length is controllable；Valve control is flexible.
Brake actuator includes locking nut, adjustment bolt, clamp spring, braking execution piston and brake piston spring, system
The dynamic piston base that executes is contacted with the brake pushrod on valve or air valve bridge, and achievable braking, which is arranged, by brake clearance is not turned on
When rocker motion it is unrelated with valve motion；Adjustment bolt top is connected through a screw thread the lock for realizing adjustment bolt with locking nut
Extremely, the structure design of adjustment bolt bottom by clamp spring and herein ensures that the movement travel of braking execution piston is controllable；Adjust spiral shell
The inner wall that the outer wall of bolt lower half portion executes piston with braking is connect by clamp spring, and is realized by adjusting the card slot on bolt
Braking executes the controlled stroke of piston（Clamp spring is completely fixed by the card slot that braking executes piston inner wall, and the card slot of adjustment bolt is set
It is set to certain altitude, piston stroke amount is executed for the braking of design）.Brake piston spring is located at the bottom that braking executes piston,
The spring makes braking execution piston not opened on i.e. braking execution piston in braking by installing the opposition of initial position
The moment is in initial position when the pressure chamber inorganic oil effect on surface, at this time actuated by cams rocker motion, because of setting for valve clearance
It sets, the lower surface that braking executes piston can not contact the brake pushrod on valve or air valve bridge, can not drive valve；It is opened in braking
Qi Hou, due to pressure chamber engine oil pressure act on, braking execute piston overpowers acting force of the spring, push open braking execute piston and to
Lower movement, because of card slot and the position-limiting action of clamp spring, braking executes piston and moves to card slot bottommost together with clamp spring, at this time valve
Gap is eliminated, and brake rocker arm drives the push rod of air valve bridge under cam effect or directly drives valve motion, in compression top center
Valve is opened, realizes engine braking.Brake actuator is simple in structure, and braking distance sets by adjusting bolt card slot and clamp spring
Count the unification, it can be achieved that braking distance and design runlength；Brake actuator only needs adjustment adjustment bolt position that can meet
The adjustment of brake clearance, method of adjustment are simple；Brake actuator assembly is simple, at low cost, braking power is higher.
Engine braking executing agency and oil circuit control mechanism are located at rocking arm inner cavity, and oil circuit control mechanism has oil inlet and fuel-displaced
Two oilholes, fuel feed hole are connected to rocker arm shaft braking working connection, and oil outlet is connected to brake actuator upper surface.Work as solenoid valve
After unlatching, brake circuit is connected to lubricant passage way, and machine oil enters brake circuit by solenoid valve, is entered after oil circuit control mechanism
Braking executes the inner cavity of piston upper surface and forms pressure chamber, and pressure-driven braking executes descent of piston, descent of piston stroke
It is fixed by clamp spring position, after braking, which executes piston, reaches range, braking is opened, the movement of actuated by cams brake rocker arm；When
When braking executes descent of piston driving valve, pressure chamber forms high pressure chest, and oil circuit control mechanism can realize the close of high pressure oil at this time
Envelope, after high-voltage oil cavity is formed, because of the Incoercibility of machine oil, braking executes piston and is in maximum travel position always, and cam drives
Shake arm and open valve in compression top center, realizes engine braking.When solenoid valve is closed, the machine oil in pressure chamber can pass through
Oil circuit control mechanism is back to brake circuit, and by the draining road pressure release of solenoid valve, and braking executes piston in brake piston bullet
Initial position is returned under the action of spring, rocking arm is rotated by cam, because of the setting of valve clearance, is executed braking and is executed work
Bottom is filled in not with valve contacts, is braked off.Oil circuit control mechanism can realize the pressure that hydraulic oil enters on braking execution piston
Chamber simultaneously locks, and the machine oil of pressure chamber can be back to brake circuit by the oil circuit and be let out by solenoid valve after brake contact
Pressure.
Embodiment：
Referring to Fig. 1 to Fig. 4, a kind of engine braking executing agency, including the braking inner cavity 41 of Rocker arm 4 and its inside set
The braking set executes piston 7, adjustment bolt 8, and the braking inner cavity 41 is communicated with the brake circuit 42 in Rocker arm 4, the braking
The lower section for executing piston 7 is provided with air valve yoke 3, and 5, No. two valves 6 of No.1 valve are provided on air valve yoke 3；It is described to start mechanism
Dynamic executing agency further includes brake piston spring 9, clamp spring 10, and drawing-in is braked inner cavity 41, shaken successively for one end of the adjustment bolt 8
It is connected with the locking nut 11 outside Rocker arm 4 after arm 4, No.1 card slot is provided on the outer wall of the other end of adjustment bolt 8
81, the braking executes piston 7 and is provided with No. two card slots on the inner wall of one end of adjustment bolt 8, and braking executes piston 7
The position for being located at 41 lower section of braking inner cavity on bottom is provided with brake piston spring 9, and the inside line of the clamp spring 10 is in No.1
In card slot 81, the outside portion of clamp spring 10 is fixed in No. two card slots；The height of the No.1 card slot 81 is equal to braking and executes piston 7
Path increment；The engine braking executing agency further includes brake pushrod 12, one end and the No.1 valve 5 of the air valve yoke 3
It is connected, the other end of air valve yoke 3 is set on brake pushrod 12, and one end of the brake pushrod 12 is connected with No. two valves 6
It connects, the other end of brake pushrod 12 and braking right over it are formed with valve clearance 13, the system between executing piston 7
Dynamic push rod 12 is slided up and down along air valve yoke 3；The brake pushrod 12 is T-type structure, and brake pushrod 12 includes connected vertically one
Number interconnecting piece 121 and No. two interconnecting pieces 122,121, No. two interconnecting pieces 122 of the No.1 interconnecting piece are cylindrical structure, No.1
The diameter of interconnecting piece 121 is less than the diameter of No. two interconnecting pieces 122, and the air valve yoke 3 is set on No.1 interconnecting piece 121, described
One end setting of No. two interconnecting pieces 122 far from No.1 interconnecting piece 121 is fluted, and No. two interconnecting pieces 122 are set in two by groove
On number valve 6；The brake piston spring 9 is piece type spring, and brake piston spring 9 is fixed on by screw 19 on Rocker arm 4；Institute
The endoporus of the outer wall and Rocker arm 4 of stating adjustment bolt 8 is connected using fine thread, and outer wall and the locking nut 11 of adjustment bolt 8 are adopted
The threaded connection of same size is connected with the fine thread between same adjustment bolt 8 and Rocker arm 4.
Claims (6)
1. a kind of engine braking executing agency, including rocking arm（4）Braking inner cavity（41）And its internal braking being arranged is held
Row piston（7）, adjustment bolt（8）, the braking inner cavity（41）With rocking arm（4）Interior brake circuit（42）It communicates, the braking
Execute piston（7）Lower section be provided with air valve yoke（3）, air valve yoke（3）On be provided with No.1 valve（5）, No. two valves（6）,
It is characterized in that：
The engine braking executing agency further includes brake piston spring（9）, clamp spring（10）, the adjustment bolt（8）One
Drawing-in brakes inner cavity successively at end（41）, rocking arm（4）Afterwards with positioned at rocking arm（4）Outer locking nut（11）It is connected, adjustment bolt
（8）The other end outer wall on be provided with No.1 card slot（81）, the braking execution piston（7）Close to adjustment bolt（8）One
No. two card slots are provided on the inner wall at end, braking executes piston（7）Bottom on be located at braking inner cavity（41）The position of lower section is set
It is equipped with brake piston spring（9）, the clamp spring（10）Inside line in No.1 card slot（81）It is interior, clamp spring（10）Outside portion it is solid
It is scheduled in No. two card slots.
2. a kind of engine braking executing agency according to claim 1, it is characterised in that：The No.1 card slot（81）'s
Height is equal to braking and executes piston（7）Path increment.
3. a kind of engine braking executing agency according to claim 1 or 2, it is characterised in that：The engine braking
Executing agency further includes brake pushrod（12）, the air valve yoke（3）One end and No.1 valve（5）It is connected, air valve yoke（3）'s
The other end is set in brake pushrod（12）On, the brake pushrod（12）One end and No. two valves（6）It is connected, brake pushrod
（12）The other end execute piston with the braking right over it（7）Between be formed with valve clearance（13）, the braking pushes away
Bar（12）Along air valve yoke（3）It slides up and down.
4. a kind of engine braking executing agency according to claim 3, it is characterised in that：The brake pushrod（12）For
T-type structure, brake pushrod（12）Including No.1 interconnecting piece connected vertically（121）With No. two interconnecting pieces（122）, the No.1 company
Socket part（121）, No. two interconnecting pieces（122）It is cylindrical structure, No.1 interconnecting piece（121）Diameter be less than No. two interconnecting pieces
（122）Diameter, the air valve yoke（3）It is set in No.1 interconnecting piece（121）On, No. two interconnecting pieces（122）Far from No.1
Interconnecting piece（121）One end be arranged fluted, No. two interconnecting pieces（122）It is set in No. two valves by groove（6）On.
5. a kind of engine braking executing agency according to claim 3, it is characterised in that：The brake piston spring
（9）For piece type spring, brake piston spring（9）Pass through screw（19）It is fixed on rocking arm（4）On.
6. a kind of engine braking executing agency according to claim 3, it is characterised in that：The adjustment bolt（8）'s
Outer wall and rocking arm（4）Endoporus using fine thread connect, adjustment bolt（8）Outer wall and locking nut（11）Using same adjustment
Bolt（8）With rocking arm（4）Between fine thread connection same size threaded connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721769828.9U CN207864059U (en) | 2017-12-18 | 2017-12-18 | A kind of engine braking executing agency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721769828.9U CN207864059U (en) | 2017-12-18 | 2017-12-18 | A kind of engine braking executing agency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207864059U true CN207864059U (en) | 2018-09-14 |
Family
ID=63469557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721769828.9U Active CN207864059U (en) | 2017-12-18 | 2017-12-18 | A kind of engine braking executing agency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207864059U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956586A (en) * | 2017-12-18 | 2018-04-24 | 东风商用车有限公司 | A kind of engine braking executing agency |
| CN110425015A (en) * | 2019-09-10 | 2019-11-08 | 浙江黎明智造股份有限公司 | A kind of hydraulically-controlled type engine braking apparatus |
-
2017
- 2017-12-18 CN CN201721769828.9U patent/CN207864059U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956586A (en) * | 2017-12-18 | 2018-04-24 | 东风商用车有限公司 | A kind of engine braking executing agency |
| CN107956586B (en) * | 2017-12-18 | 2023-09-12 | 东风商用车有限公司 | Engine braking actuating mechanism |
| CN110425015A (en) * | 2019-09-10 | 2019-11-08 | 浙江黎明智造股份有限公司 | A kind of hydraulically-controlled type engine braking apparatus |
| CN110425015B (en) * | 2019-09-10 | 2024-02-27 | 浙江黎明智造股份有限公司 | Hydraulic control type engine braking device |
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