CN209079987U - Hydraulic control braking in a turn valve and bull-dozer - Google Patents
Hydraulic control braking in a turn valve and bull-dozer Download PDFInfo
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- CN209079987U CN209079987U CN201821351980.XU CN201821351980U CN209079987U CN 209079987 U CN209079987 U CN 209079987U CN 201821351980 U CN201821351980 U CN 201821351980U CN 209079987 U CN209079987 U CN 209079987U
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Abstract
The utility model relates to a kind of hydraulic control braking in a turn valves, including steering control valve and brake control valve, steering control valve and brake control valve are integrated in inside a valve pocket, valve body is arranged with outside valve pocket, steering control valve includes the steering valve core on the right side in valve pocket, brake control valve includes the brake spool in the left side in valve pocket, brake spool and steering valve core are respectively positioned in valve pocket, and in valve pocket internal slide, there is straight pin to separate two spools between steering valve core and brake spool, plug screw is mounted on valve body left end, cover board is mounted on the right end of valve body, valve pocket is equipped with oil duct can be with hydraulic pump, brake, steering cluth, fuel tank is respectively to phase oil canal.The invention also discloses a kind of bull-dozers.The utility model has the following beneficial effects: pilot control component structure is more compact；And structure is simple, compact, is conducive to complete machine layout.
Description
Technical field
The utility model relates to a kind of hydraulic control braking in a turn valve and bull-dozers, belong to bull-dozer technical field.
Background technique
Conventional bulldozer steering brake valve is mechanical at present, including the portions such as mechanical drag link mechanism, switching valve, braking
Point, wherein switching valve and brake valve are made of components such as valve body, spool, springs.In patent CN202108067U, one is disclosed
Kind bulldozer steering brake linkage valve first passes through control pull rod, and then pulls valve body that can also link to control switching valve
Switching valve and brake valve are controlled, to realize the effective brake after power disengagement.
In patent CN202624356U, a kind of braking in a turn valve, including operating stick, switching valve, brake valve etc. are disclosed,
It include wherein the components such as valve body, spool, spring inside switching valve and brake valve, the brake valve of the braking in a turn valve is by steering
Valve pushes brake spool mobile, and while reaching certain value by rationally designing pressure of the guarantee brake spool in turn-around chamber could
It is pushed, after realizing steering cluth separation, arrestment mechanism just starts to brake, this technical solution solves arrestment mechanism and steering
The problem of clutch interferes avoids the abrasion of arrestment mechanism.
In patent CN206826746U, a kind of hydraulic control braking in a turn valve is disclosed comprising switching valve and brake valve,
Middle switching valve and brake valve include the components such as valve body, spool, spring, and the hydraulic control braking in a turn valve, by hydraulic control, guide is replaced
Originally mechanical operation, reduces driver's working strength, also solves arrestment mechanism and what steering cluth interfered asks
Topic, avoids the wear problem of arrestment mechanism.
By being compared above as can be seen that either current conventional structure or the above patent, all the problem is that:
Current bulldozer steering brake valve generally all includes switching valve and brake valve, and all includes valve inside switching valve and brake valve
Multiple components such as body, spool, spring, structure is complicated, higher to assembling and debugging level requirement；Valve body is usually casting, is added
Work manufacture is complicated；Simultaneously as the decaying of spring element fatigue behaviour is affected to valve performance, shadow there are multiple spring elements
The reliability for ringing steering-braking mechanism, to influence traffic safety.
Utility model content
According to the above-mentioned deficiencies in the prior art, technical problem to be solved by the utility model is: providing a kind of hydraulic control turn
To brake valve and bull-dozer, simple and compact for structure, processing and manufacturing requires low, high reliablity, while to avoid the occurrence of steering and system
Dynamic " fighting " phenomenon, improves actuated element reliability and traffic safety.
Hydraulic control braking in a turn valve described in the utility model, it is characterised in that: including steering control valve and brake control valve,
Steering control valve and brake control valve are integrated in inside a valve pocket, and valve body is arranged with outside valve pocket, and steering control valve includes being located at
The steering valve core on right side in valve pocket, brake control valve include the brake spool in the left side in valve pocket, brake spool and switching valve
Core is respectively positioned in valve pocket, and has straight pin to separate two spools in valve pocket internal slide, between steering valve core and brake spool,
Plug screw is mounted on valve body left end, and cover board is mounted on the right end of valve body, and valve pocket is equipped with oil duct can be with hydraulic pump, brake, steering
Clutch, fuel tank are respectively to phase oil canal.
The plug screw is fixedly mounted on valve body left end, and plug screw right end is piston-like, brake spool left end inner cavity and plug screw
It matches, and brake spool can be movable relatively with plug screw；Brake spool is equipped with hole d and hole c, and mesoporous d is looping pit, position
In brake spool left end, the C chamber on the left of brake spool can be made to be connected with oil circuit outside brake spool, hole c makes plug screw and brake valve
Oil pocket between core is connected with oil circuit outside brake spool, and brake spool right end is separated by straight pin and steering valve core, brake valve
It is A chamber between core, steering valve core, therefore A chamber can act on brake spool right end and steering valve core left end simultaneously.
The steering valve core is equipped with throttle orifice a and hole b, and wherein throttle orifice a is connected to cover board and A chamber, and hydraulic pilot oil is logical
It crosses throttle orifice a and establishes pressure difference between external and A chamber, hole b is provided on steering valve core, hole b can make outside A chamber and steering valve core
Oil circuit conducting.
The invention also discloses a kind of bull-dozer, including hydraulic control braking in a turn valve, hydraulic pump, brake, steering from
Clutch and fuel tank, hydraulic pump, brake, steering cluth, fuel tank are connected to hydraulic control braking in a turn valve respectively, and the hydraulic control turns to
Brake valve is above-mentioned hydraulic control braking in a turn valve.
Working principle of the utility model is: guide oil enters throttle orifice a from hydraulic control braking in a turn valve right end cover plate hydraulic fluid port,
Throttle orifice a establishes two sides pressure difference, and steering valve core is pushed to move left, and prexxure of the hydraulic pump oil is connected with steering cluth at this time, turns to
Pressure rises；Steering pressure oil through hole b enters A chamber simultaneously, and due to steering pressure < guide's oil pressure, steering valve core position is not
Become；
The steering pressure oil while the pilot pressure as brake spool of A chamber, act on B with left side prexxure of the hydraulic pump oil
The hydraulic coupling of chamber balances each other, only A chamber oil pressure, i.e. steering pressure, when reaching setting pressure, just brake spool is pushed to move to left, pressed
Power oil initially enters brake, and brake pressure rises, A chamber oil pressure active force and B chamber hydraulic pump oil pressure active force, C chamber brake oil
Pressure balances each other, and bull-dozer realizes braking in a turn movement at this time.
When operator releases braking in a turn operation, right end pilot pressure is reduced, and steering valve core is made in A chamber steering pressure
It is moved to right under, steering cluth pressure release, the decline of A cavity pressure；Brake spool is made in B chamber prexxure of the hydraulic pump oil and C chamber oil pressure simultaneously
It is moved to right under, brake pressure release, arrestment mechanism contact braking.
Compared with prior art, the utility model has the following beneficial effects:
(1) it can use lesser guide's oil stream amount, control hydraulic pump flows to the flow of steering cluth and brake, drop
The low flow demand of pilot control element is conducive to the design of pilot control element, keeps pilot control component structure more compact；
(2) the hydraulic control braking in a turn valve in the present invention only includes a small amount of element such as valve body, valve pocket and spool, does not need to cast
Valve body reduces processing cost, and structure is simple, compact, is conducive to complete machine layout；
(3) spring element is not needed in the hydraulic control braking in a turn valve in the present invention, avoids spring element fatigue behaviour and declines
Subtract the influence to valve performance, while keeping structure simpler, compact.
Detailed description of the invention
Fig. 1 is that this adapts to novel structural schematic diagram.
In figure: 1, hydraulic control braking in a turn valve 101, plug screw 102, valve body 103, valve pocket 104, brake spool 105, circle
Pin 106, steering valve core 107, cover board 2, hydraulic pump 3, brake 4, steering cluth 5, fuel tank 6, throttle orifice a 7,
Hole b 8, hole c 9, hole d 10, A chamber 11, B chamber 12, C chamber.
Specific embodiment
The utility model is described further with reference to the accompanying drawing:
Below by way of specific embodiment, the utility model is described in further detail, but not to limit the utility model, all
Within spirit of that invention and principle, any modification, equivalent replacement, improvement and so on should be included in the utility model
Within protection scope.
Embodiment one
As shown in Figure 1, the hydraulic control braking in a turn valve, including steering control valve and brake control valve, steering control valve and
Brake control valve is integrated in inside a valve pocket 103, and valve body 102 is arranged with outside valve pocket 103, and steering control valve includes being located at valve pocket
The steering valve core 106 on right side in 103, brake control valve include the brake spool 104 in the left side in valve pocket 103, brake spool
104 and steering valve core 106 be respectively positioned in valve pocket 103, and in 103 internal slide of valve pocket, steering valve core 106 and brake spool 104
Between there is straight pin 105 to separate two spools, plug screw 101 is mounted on 102 left end of valve body, and cover board 107 is mounted on valve body 102
Right end, valve pocket 103 is equipped with oil duct can be with hydraulic pump 2, brake 3, steering cluth 4, fuel tank 5 respectively to phase oil canal.
In the present embodiment, the plug screw 101 is fixedly mounted on 102 left end of valve body, and 101 right end of plug screw is piston-like, system
104 left end inner cavity of movable valve plug is matched with plug screw 101, and brake spool 104 can be movable relatively with plug screw 101；Brake spool
104 are equipped with hole d9 and hole c8, and mesoporous d9 is looping pit, is located at 104 left end of brake spool, can make 104 left side of brake spool
C chamber 12 be connected with 104 outside oil circuit of brake spool, hole c8 makes oil pocket and brake valve between plug screw 101 and brake spool 104
The conducting of 104 outside oil circuit of core, 104 right end of brake spool are separated by straight pin 105 and steering valve core 106, and brake spool 104 turns
To being A chamber 10 between spool 106, therefore A chamber 10 can act on 106 left end of 104 right end of brake spool and steering valve core simultaneously；Institute
Steering valve core 106 is stated equipped with throttle orifice a6 and hole b7, wherein throttle orifice a6 is connected to cover board 107 and A chamber 10, and hydraulic pilot oil is logical
It crosses throttle orifice a6 and establishes pressure difference between external and A chamber 10, hole b7 is provided on steering valve core 106, hole b7 can make A chamber 10 and turn
It is connected to 106 outside oil circuit of spool.
The invention also discloses a kind of bull-dozers, including hydraulic control braking in a turn valve 1, hydraulic pump 2, brake 3, steering
Clutch 4 and fuel tank 5, hydraulic pump 2, brake 3, steering cluth 4, fuel tank 5 are connected to hydraulic control braking in a turn valve 1 respectively, institute
Stating hydraulic control braking in a turn valve 1 is above-mentioned hydraulic control braking in a turn valve.
The working principle of this specific embodiment:: steering control valve and brake control valve are integrated in a valve body 102 and valve
Inside set 103；There is steering valve core 106 in steering control valve, there is brake spool 104, steering valve core 106 and system in brake control valve
There is straight pin 105 to separate two spools among movable valve plug 104；102 both ends of valve body are respectively by plug screw 101 and cover board 107.Wherein
Plug screw 101 is fixedly mounted on hydraulic control switching valve left end, and 101 right end of plug screw is piston-like；104 left end inner cavity of brake spool and spiral shell
Plug 101 matches, and brake spool 104 can mutually be moved with plug screw 101；Brake spool 104 is equipped with hole d and hole c, mesoporous
D is looping pit, is located at 104 left end of brake spool, 104 left chamber C of brake spool can be made to lead with 104 outside oil circuit of brake spool
It is logical；The oil pocket between plug screw 101 and brake spool 104 is connected with 104 outside oil circuit of brake spool in hole c.Brake spool 104 is right
End is separated by straight pin 105 and steering valve core 106, therefore A chamber can act on 104 right end of brake spool and steering valve core simultaneously
106 left ends.
The steering valve core 106 of 105 right end of straight pin is equipped with throttle orifice a and hole b, and wherein throttle orifice a is located at hydraulic pilot
Between oil and A chamber, hydraulic pilot oil establishes pressure difference between external and A chamber by throttle orifice a；Hole b can make A chamber and steering valve core
The conducting of 106 outside oil circuits.
Brake spool 104 and brake spool 106 are respectively positioned between valve pocket 103, and are moved inside valve pocket 103；Valve
Set 103 is equipped with oil duct and can communicate with fuel tank 5, hydraulic pump 2, brake 3, steering cluth 4.
When bull-dozer opens vehicle, and braking in a turn does not have any operation, there is no hydraulic pilot oil pressure, steering valve core 106 is located at
Default location, steering valve core 106 disconnect the oil circuit between 2 oil sources of hydraulic pump and steering cluth 4, fuel tank 5, steering valve core
106 do not act, and A chamber is also without oil pressure at this time；And the oil liquid from hydraulic pump 2 enters system by 104 left end hole d of brake spool
104 left end C chamber of movable valve plug, since right end A chamber does not have oil pressure, brake spool 104 pushes system under the intracavitary oil pressure effect of C
Movable valve plug 104 is moved right to straight pin 105, and brake spool 104 breaks oil circuit at hydraulic pump 2 and 3 oil circuit of brake at this time
It opens, and 3 oil circuit of brake is communicated with fuel tank 5, without pressure in brake 3, bull-dozer is in brake release state.
Hydraulic pilot oil enters in valve from the hydraulic fluid port in hydraulic control braking in a turn valve right end cover plate 107, builds in the two sides throttle orifice a
Vertical pressure difference pushes steering valve core 106 to be moved to the left, the pressure oil at this time from hydraulic pump 2 passes through valve under action of hydraulic force
Set 103, steering valve core 106 and steering cluth 4 are connected, and 4 oil pressure of steering cluth and 5 access of fuel tank disconnect, and turn at this time
Oil pressure rises in clutch 4；The pressure oil through hole b in hydraulic pump 2 enters the A chamber of 106 left end of steering valve core, A chamber oil simultaneously
Pressure is identical as pressure in steering cluth 4, and steering pressure is also less than guide's oil pressure at this time, and steering valve core position is constant；
Since A cavity pressure is also lower at this time, 104 right end stress of brake spool is less than left end stress, 104 position of brake spool
It is constant.
When pressure rises to certain value in steering cluth 4, A cavity pressure is also increased at this time, brake spool 104
Stress condition is as follows:
FCA < FPC
Be greater than left end when 104 right end of brake spool is pressurized and be pressurized, brake spool 104 is moved to the left, make 2 oil circuit of hydraulic pump with
3 oil circuit of brake is connected, and oil pressure is begun to ramp up in brake 3, and the stress condition of brake spool 104 is as follows at this time:
FCA=FPC+FBB
When steering pressure, which rises to, is up to 2 oil pressure of hydraulic pump, A chamber oil pressure also no longer rises, at this time brake pressure
It rises to and is up to 2 oil pressure of hydraulic pump, bull-dozer realizes leftward or rightward side go to action at this time.
When operator releases braking in a turn operation, the hydraulic pilot oil pressure of right end declines, at this time A chamber and hydraulic pump 2
Oil circuit, 4 oil circuit of steering cluth communicate, and still have oil pressure, and pressure difference is established at throttle orifice a, therefore steering valve core 106 is on a left side
Hold under the effect of A cavity pressure, move right, steering valve core 106 disconnects 2 oil circuit of hydraulic pump and 4 oil circuit of steering cluth, turn to from
4 oil circuit of clutch is communicated with 5 oil circuit of fuel tank, 4 pressure release of steering cluth；Meanwhile the also pressure release of A chamber, B chamber, the effect of C chamber oil pressure in left end
Under, brake spool 104 moves right, and brake spool 104 makes 2 oil circuit of hydraulic pump and the disconnection of 3 oil circuit of brake, 3 oil circuit of brake
It is communicated with 5 oil circuit of fuel tank, 3 pressure release of brake；Brake release at this time.
The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.This
The technical staff of industry is retouched in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
That states merely illustrates the principles of the invention, and on the premise of not departing from the spirit and scope of the utility model, the utility model can also
There are various changes and modifications, these various changes and improvements fall within the scope of the claimed invention.The utility model is wanted
Protection scope is asked to be defined by the appending claims and its equivalent thereof.
Claims (4)
1. a kind of hydraulic control braking in a turn valve, it is characterised in that: including steering control valve and brake control valve, steering control valve and system
Dynamic control valve is integrated in valve pocket (103) inside, is arranged with valve body (102) outside valve pocket (103), steering control valve includes being located at
The steering valve core (106) on right side in valve pocket (103), brake control valve include the brake spool in the left side in valve pocket (103)
(104), brake spool (104) and steering valve core (106) are respectively positioned in valve pocket (103), and in valve pocket (103) internal slide, are turned
There is straight pin (105) to separate two spools between spool (106) and brake spool (104), plug screw (101) is mounted on valve body
(102) left end, cover board (107) are mounted on the right end of valve body (102), and valve pocket (103) is equipped with oil duct can be with hydraulic pump (2), system
Dynamic device (3), steering cluth (4), fuel tank (5) are respectively to phase oil canal.
2. hydraulic control braking in a turn valve according to claim 1, it is characterised in that: the plug screw (101) is fixedly mounted on valve
Body (102) left end, and plug screw (101) right end is piston-like, brake spool (104) left end inner cavity is matched with plug screw (101), and
Brake spool (104) can be movable relatively with plug screw (101)；Brake spool (104) is equipped with hole d(9) and hole c(8), mesoporous
D(9) it is looping pit, is located at brake spool (104) left end, C chamber (12) and the brake spool on the left of brake spool (104) can be made
(104) external oil circuit conducting, hole c(8) make the oil pocket between plug screw (101) and brake spool (104) with brake spool (104) outside
The conducting of portion's oil circuit, brake spool (104) right end are separated by straight pin (105) and steering valve core (106), and brake spool (104) turns
To being A chamber (10) between spool (106), therefore A chamber (10) can act on brake spool (104) right end and steering valve core simultaneously
(106) left end.
3. hydraulic control braking in a turn valve according to claim 2, it is characterised in that: the steering valve core (106) is equipped with section
Discharge orifice a(6) and hole b(7), wherein throttle orifice a(6) connection cover board (107) and A chamber (10), hydraulic pilot oil passes through throttle orifice a
(6) pressure difference is established between external and A chamber (10), steering valve core is provided with hole b(7 on (106)), hole b(7) A chamber (10) can be made
It is connected with the external oil circuit of steering valve core (106).
4. a kind of bull-dozer, it is characterised in that: including hydraulic control braking in a turn valve (1), hydraulic pump (2), brake (3), turn to from
Clutch (4) and fuel tank (5), hydraulic pump (2), brake (3), steering cluth (4), fuel tank (5) respectively with hydraulic control braking in a turn
Valve (1) connection, the hydraulic control braking in a turn valve (1) are hydraulic control braking in a turn valve as described in any one of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821351980.XU CN209079987U (en) | 2018-08-22 | 2018-08-22 | Hydraulic control braking in a turn valve and bull-dozer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821351980.XU CN209079987U (en) | 2018-08-22 | 2018-08-22 | Hydraulic control braking in a turn valve and bull-dozer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209079987U true CN209079987U (en) | 2019-07-09 |
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ID=67115002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821351980.XU Active CN209079987U (en) | 2018-08-22 | 2018-08-22 | Hydraulic control braking in a turn valve and bull-dozer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209079987U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396388A (en) * | 2020-04-26 | 2020-07-10 | 山推工程机械股份有限公司 | Speed change valve group and gear shifting control system |
| CN113002506A (en) * | 2021-03-29 | 2021-06-22 | 安徽江淮汽车集团股份有限公司 | Hydraulic control air valve and automobile brake control system |
-
2018
- 2018-08-22 CN CN201821351980.XU patent/CN209079987U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396388A (en) * | 2020-04-26 | 2020-07-10 | 山推工程机械股份有限公司 | Speed change valve group and gear shifting control system |
| CN111396388B (en) * | 2020-04-26 | 2022-03-29 | 山推工程机械股份有限公司 | Speed change valve group and gear shifting control system |
| CN113002506A (en) * | 2021-03-29 | 2021-06-22 | 安徽江淮汽车集团股份有限公司 | Hydraulic control air valve and automobile brake control system |
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