CN207484544U - A kind of bull-dozer secure parking hydraulic system - Google Patents
A kind of bull-dozer secure parking hydraulic system Download PDFInfo
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- CN207484544U CN207484544U CN201721615667.8U CN201721615667U CN207484544U CN 207484544 U CN207484544 U CN 207484544U CN 201721615667 U CN201721615667 U CN 201721615667U CN 207484544 U CN207484544 U CN 207484544U
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Abstract
The utility model is related to a kind of bull-dozer secure parking hydraulic systems.It includes hydraulic oil container, slippage pump is connected with hydraulic oil container, slippage pump is equipped with the first coupled pipeline, one end of second pipeline and the first pipeline and company, the other end of second pipeline is connected with the t of braking electromagnetic valve mouths, the a mouths of braking electromagnetic valve are connected by third pipeline with the cavity on the left of brake cylinder upper piston, brake cylinder upper piston rod is connected with brake, one end of 7th pipeline is connected with hydraulic oil container, the other end of 7th pipeline is connected with the t of pilot solenoid valve mouths, the p mouths of pilot solenoid valve pass through the 5th pipeline and the first pipeline and company, the a mouths of pilot solenoid valve are connected with the k1 mouths of trimmer valve, the p mouths of trimmer valve are connected by the 4th pipeline with the p mouths of braking electromagnetic valve, the a mouths of trimmer valve pass through the 6th pipeline and the 7th pipeline and company.The utility model can realize that bull-dozer gradual braking stops when electric fault occurs, and improves full hydraulic bulldozer driving safety.
Description
Technical field
The utility model is related to a kind of bull-dozer secure parking hydraulic systems.
Background technology
At present, full hydraulic bulldozer braking system is generally normally closed type, i.e., when the braking electromagnetic valve in hydraulic braking system
During power-off, slippage pump oil pressure does not enter brake, brake engagement fuel tank, therefore is pushed away in brake without oil pressure, brake spring
Piston pressing friction piece, so as to which the rotating element in transmission mechanism be made to be disengaged with external walking mechanism, and and brake shell
The retaining elements such as body, rack combine, and realize that full hydraulic bulldozer braking is even stopped；And when the braking electricity in hydraulic braking system
When magnet valve is powered, the pressure oil that slippage pump comes out enters brake by braking electromagnetic valve, and pressure oil compresses brake spring, makes
It is unclamped between brake inner attrition piece, so as to make the rotating element in transmission mechanism fixed not with brake shell body, rack etc.
Element is combined, it can be achieved that normal mule carriage.
This technical solution is powered or powers off by the braking electromagnetic valve in hydraulic braking system, so as to fulfill brake
The break-make of hydraulic circuit.Its existing main problem is, in full hydraulic bulldozer is normally driven a vehicle, in case of electric fault
Braking electromagnetic valve is caused to power off suddenly, then brake was combined, made by braking electromagnetic valve pressure release the oil pressure meeting moment in brake
The unexpected Brake stop of bull-dozer can bring very big insecurity to operator.
Utility model content
The utility model provides a kind of bull-dozer secure parking hydraulic system, it is reasonable in design, can realize
Bull-dozer gradual braking parking during electric fault occurs, improves full hydraulic bulldozer driving safety, solves in the prior art
There are the problem of.
Used technical solution is the utility model to solve above-mentioned technical problem：It includes hydraulic oil container, slippage pump
It is connected with hydraulic oil container, slippage pump is equipped with the first coupled pipeline, one end of the second pipeline and the first pipeline and company, the
The other end of two pipelines is connected with the t of braking electromagnetic valve mouths, and a mouths of braking electromagnetic valve pass through lives on third pipeline and brake cylinder
The cavity in plug left side is connected, and brake cylinder upper piston rod is connected with brake, and one end of the 7th pipeline is connected with hydraulic oil container, the
The other end of seven pipelines is connected with the t of pilot solenoid valve mouths, the p mouths of pilot solenoid valve by the 5th pipeline and the first pipeline simultaneously
Even, a mouths of pilot solenoid valve are connected with the k1 mouths of trimmer valve, and the p mouths of trimmer valve pass through the 4th pipeline and the p mouths of braking electromagnetic valve
It is connected, for a mouths of trimmer valve by the 6th pipeline and the 7th pipeline and company, braking electromagnetic valve is two-bit triplet solenoid valve, first conductive
Magnet valve is two-bit triplet solenoid valve, and trimmer valve is two-position three-way valve, and throttling is equipped on the access of trimmer valve lower end operating position
Hole is equipped in trimmer valve upper end operating position and connects a mouthfuls and p mouthfuls of draining access.
First pipeline is connected with repairing hydraulic system.
Slippage pump is connected with walking mechanism.
The lower end operating position of trimmer valve has k2 mouthfuls, is connected when trimmer valve is located at lower end operating position with p mouthfuls for k2 mouthfuls.
The utility model can be such that full hydraulic bulldozer is slowly braked when electric fault occurs, and realize that bull-dozer steadily stops
Vehicle effectively prevent full hydraulic bulldozer braking system that electric fault occurs and causes unexpected braking, improves full hydraulic bulldozer driving
Safety.
Description of the drawings
Fig. 1 is the structure diagram of the utility model.
In figure, the 1, first pipeline, the 2, second pipeline, 3, third pipeline, the 4, the 4th pipeline, the 5, the 5th pipeline, the 6, the 6th pipe
Road, the 7, the 7th pipeline, 8, hydraulic oil container, 9, slippage pump, 10, braking electromagnetic valve, 11, brake cylinder, 12, pilot solenoid valve, 13,
Trimmer valve, 14, throttle orifice, 15, draining access, 16, brake.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this reality
It is described in detail with novel.
As shown in FIG., the utility model includes hydraulic oil container 8, and slippage pump 9 is connected with hydraulic oil container 8, is set on slippage pump 9
There are the first coupled pipeline 1, one end of the second pipeline 2 and the first pipeline 1 and connect, the other end of the second pipeline 2 and braking
The t mouths of solenoid valve 10 are connected, and a mouths of braking electromagnetic valve 10 pass through the cavity on the left of third pipeline 3 and 11 upper piston of brake cylinder
It is connected, 11 upper piston rod of brake cylinder is connected with brake 16.One end of 7th pipeline 7 is connected with hydraulic oil container 8, the 7th pipeline
7 other end is connected with the t mouths of pilot solenoid valve 12.The p mouths of pilot solenoid valve 12 by the 5th pipeline 5 and the first pipeline 1 simultaneously
Even, a mouths of pilot solenoid valve 12 are connected with the k1 mouths of trimmer valve 13.The p mouths of trimmer valve 13 pass through the 4th pipeline 4 and braking electromagnetism
The p mouths of valve 11 are connected, and a mouths of trimmer valve 13 by the 6th pipeline 6 and the 7th pipeline 7 and connect.Braking electromagnetic valve 11 is two three
Three-way electromagnetic valve.Pilot solenoid valve 12 is two-bit triplet solenoid valve.Trimmer valve 13 is two-position three-way valve, is worked in 13 lower end of trimmer valve
The access of position is equipped with throttle orifice 14, can be used to adjust 11 draining speed of brake cylinder.In 13 upper end operating position of trimmer valve
Equipped with the draining access 15 for connecting a mouthfuls and p mouthfuls, 11 inner fluid of brake cylinder can be allow to pass through braking electromagnetic valve 11, buffering
13 rapid draining of valve.First pipeline 1 is connected with repairing hydraulic system.Slippage pump 9 is connected with walking mechanism.The lower end of trimmer valve 13
Operating position has k2 mouthfuls, is connected when trimmer valve 13 is located at lower end operating position with p mouthfuls for k2 mouthfuls, is conducive to trimmer valve 13 in this way
Resetting spring restore elastic force.
Slippage pump 9 provides hydraulic oil source for repairing hydraulic system and hydraulic braking system, from 8 oil suction of hydraulic oil container, outlet
A pressure oil part flow to repairing hydraulic system, a part needs to enter brake cylinder 11 according to hydraulic braking system, is used for
Implement the braking of bull-dozer；Pilot solenoid valve 12 is two-bit triplet solenoid valve, for controlling 13 guide's oil circuit of trimmer valve；Trimmer valve
13 be two-position three-way valve, there are one having throttle orifice 14 between hydraulic fluid port in three of them hydraulic fluid port, can be used to adjust brake cylinder 11 and let out
Speed oil；Braking electromagnetic valve 10 is two-bit triplet solenoid valve, can control brake cylinder 11 and slippage pump 9, the oil of hydraulic cylinder 8
Road break-make.
When bull-dozer normally travel, at this time controller give 10 automatically controlled guide end Y1 of braking electromagnetic valve be powered, slippage pump 9 from
8 oil suction of hydraulic oil container, then a part brake cylinder 11 is flowed to by braking electromagnetic valve 10, push 11 inner carrier of brake cylinder to
It moves right, 11 inner carrier of brake cylinder no longer compresses the friction plate in brake 16, and brake 16 is disengaged condition, is walked at this time
Motor exports power to walking mechanism, and bull-dozer can normally drive a vehicle；And 12 pilot control end Y2 of pilot solenoid valve is also at this time
Energized state, the pressure oil that slippage pump 9 exports give trimmer valve 13 upper end one elder generation by 12 upside operating position of pilot solenoid valve
Pilot power pushes 13 core of trimmer valve to move down, and to ensure when needing braking, the oil pressure in brake cylinder 11 can be by slow
Rush the 13 direct pressure release in upper end operating position of valve.
When needing braking to realize that vehicle deceleration even stops in the normal driving conditions of bull-dozer, controller gives braking electricity
10 pilot control end Y1 of magnet valve is powered off, and braking electromagnetic valve core moves up under the effect of lower lateral spring, slippage pump 9 and brake cylinder
Oil circuit between 11 is disconnected, while the fluid in brake cylinder 11 flows back to hydraulic oil by braking electromagnetic valve 10, trimmer valve 13
Case 8；Since the pilot control end Y2 of pilot solenoid valve 12 is still in energized state, 13 core of trimmer valve is still within upper end working position
It puts, 11 inner fluid of brake cylinder can push braking by braking electromagnetic valve 10,13 rapid draining of trimmer valve, brake cylinder spring
Oil cylinder piston compresses 16 friction plate of brake, and bull-dozer is made to implement braking.
When electric fault occurs suddenly in normal driving conditions for bull-dozer, 10 pilot control end of braking electromagnetic valve at this time
Y1,12 pilot control end Y2 of pilot solenoid valve electromagnetic coil be unmagnetized, braking electromagnetic valve 10 makes under action of reset spring
The oil circuit that slippage pump 9 is exported to brake cylinder 11 is disconnected, and oil pressure passes through braking electromagnetic valve 10, trimmer valve 13 in brake cylinder 11
Flow back to hydraulic oil container 8；At this point, since 12 pilot control end Y2 electromagnetic coils of pilot solenoid valve are also unmagnetized, pilot solenoid valve 12
Under the action of reset spring of downside, 12 spool of pilot solenoid valve is pushed to move up, 13 guide's oil circuit of trimmer valve passes through pilot solenoid valve
Hydraulic oil container 8 is flowed back in 12 lower ends operating position, then trimmer valve 13 is in lower end work under the effect of opposite side resetting spring spring
Make position, pressure oil is delayed by the 14 slow pressure release of throttle orifice on 13 spool of trimmer valve, brake 16 in brake cylinder 11 at this time
It is slow to combine, so as to fulfill the purpose of the slow Brake stop of bull-dozer.
Above-mentioned specific embodiment cannot function as the limitation to scope of protection of the utility model, for the skill of the art
For art personnel, any alternate modification or transformation made to the utility model embodiment all fall within the guarantor of the utility model
In the range of shield.
Part is not described in detail for the utility model, is the known technology of those skilled in the art of the present technique.
Claims (4)
1. a kind of bull-dozer secure parking hydraulic system, it is characterised in that：Including hydraulic oil container, slippage pump and hydraulic oil container phase
Even, slippage pump is equipped with the first coupled pipeline, one end of the second pipeline and the first pipeline and company, the second pipeline it is another
End is connected with the t mouths of braking electromagnetic valve, and a mouths of braking electromagnetic valve pass through the cavity on the left of third pipeline and brake cylinder upper piston
Be connected, brake cylinder upper piston rod is connected with brake, and one end of the 7th pipeline is connected with hydraulic oil container, the 7th pipeline it is another
End is connected with the t mouths of pilot solenoid valve, and the p mouths of pilot solenoid valve pass through the 5th pipeline and the first pipeline and company, pilot solenoid valve
A mouths be connected with the k1 mouths of trimmer valve, the p mouths of trimmer valve are connected by the 4th pipeline with the p mouths of braking electromagnetic valve, trimmer valve
A mouthfuls are two-bit triplet solenoid valve by the 6th pipeline and the 7th pipeline and company, braking electromagnetic valve, and pilot solenoid valve is two-bit triplet
Solenoid valve, trimmer valve are two-position three-way valve, throttle orifice are equipped on the access of trimmer valve lower end operating position, in trimmer valve upper end
Operating position, which is equipped with, connects a mouthfuls and p mouthfuls of draining access.
2. a kind of bull-dozer secure parking hydraulic system according to claim 1, it is characterised in that：First pipeline and repairing
Hydraulic system is connected.
3. a kind of bull-dozer secure parking hydraulic system according to claim 1, it is characterised in that：Slippage pump and vehicle with walking machine
Structure is connected.
4. a kind of bull-dozer secure parking hydraulic system according to claim 1, it is characterised in that：The lower end work of trimmer valve
Make position with k2 mouthfuls, be connected when trimmer valve is located at lower end operating position with p mouthfuls for k2 mouthfuls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721615667.8U CN207484544U (en) | 2017-11-28 | 2017-11-28 | A kind of bull-dozer secure parking hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721615667.8U CN207484544U (en) | 2017-11-28 | 2017-11-28 | A kind of bull-dozer secure parking hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207484544U true CN207484544U (en) | 2018-06-12 |
Family
ID=62472995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721615667.8U Active CN207484544U (en) | 2017-11-28 | 2017-11-28 | A kind of bull-dozer secure parking hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207484544U (en) |
-
2017
- 2017-11-28 CN CN201721615667.8U patent/CN207484544U/en active Active
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