CN203832474U - Steering and braking hydraulic system - Google Patents

Steering and braking hydraulic system Download PDF

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Publication number
CN203832474U
CN203832474U CN201420285052.3U CN201420285052U CN203832474U CN 203832474 U CN203832474 U CN 203832474U CN 201420285052 U CN201420285052 U CN 201420285052U CN 203832474 U CN203832474 U CN 203832474U
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CN
China
Prior art keywords
braking
turn
steering
hydraulic
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420285052.3U
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Chinese (zh)
Inventor
丁佳敏
赵建军
金轲
宋金宝
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Shantui Chutian Construction Machinery Co Ltd
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Shantui Chutian Construction Machinery Co Ltd
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Priority to CN201420285052.3U priority Critical patent/CN203832474U/en
Application granted granted Critical
Publication of CN203832474U publication Critical patent/CN203832474U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model provides a steering and braking hydraulic system. The steering and braking hydraulic system comprises a main oil way communicated with an oil tank, and the main oil way is provided with a hydraulic pump and five branch oil ways connected in parallel, wherein the fiver branch oil ways are connected with a torque converter, a speed control system, a pedal braking mechanism, a clutch braking system and a steering control mechanism respectively. The steering and braking hydraulic system can obviously reduce the control force, improve the operating comfort level and obtain good co-movement of steering pressure and braking pressure.

Description

A kind of braking in a turn hydraulic efficiency pressure system
Technical field
The utility model relates to a kind of hydraulic efficiency pressure system, especially a kind of braking in a turn hydraulic efficiency pressure system.
Background technology
In the hydraulic efficiency pressure system of construction machinery and equipment, braking in a turn hydraulic efficiency pressure system is a very important part, in order to realize turning to and braking of vehicle, while handling steering tiller, realizes turning to of vehicle, while stepping on brake pedal, realizes the braking of vehicle.Fig. 1 is the schematic diagram that turns to brake system in prior art.After cycling start, speed change steering pump 1 is from rear axle box 6 oil suctions, and pressure oil is divided into three tunnels through after being provided with the precision filter 2 of by-pass collar: the main safety valve 3 of leading up to removes tor-con; Speed change system is removed on one tunnel; The reducing valve 4 of finally leading up to removes braking in a turn valve 5.In the time of inoperation steering tiller, pressure oil directly enters into left brake coupling (LB) and right brake coupling (RB) through braking in a turn valve, and reaches the force value of default, and now, brake coupling is thrown off; In the time handling steering tiller, as an example of left steering example (right steering in like manner), left steering pressure starts to rise, and left-hand rotation power-transfer clutch is slowly thrown off.Continue to handle steering tiller to certain position, now, left steering pressure reaches the force value of default, and left steering power-transfer clutch is thrown off completely, and the left brake-pressure of this process remains unchanged, this process implementation vehicle large radius turn.While continuing to handle steering tiller to whole process, the force value that this process left steering pressure remains on default is constant, left brake-pressure drops to zero from the force value of default, and brake coupling has been transitioned into complete engagement state from disengaged condition, and this process implementation vehicle turns little curved.
Above-mentioned braking in a turn hydraulic efficiency pressure system is mainly manually to control as main, between steering tiller and braking in a turn valve, the main mechanical linkage that relies on is connected with flexible axle, in the time that manipulation turns to, the application force of operating personal output by steering tiller, mechanical linkage and flexible axle by force transmission to spool.Because the actuating force of mechanical linkage own is just larger, add the impact of the friction force between each connecting rod, it is larger that handling maneuver power can become, in the time that operating personal works long hours, the labour intensity of increase operating personal that can be serious, reduces the traveling comfort operating, and in the time handling steering tiller fast, likely there is the situation that steering pressure and brake-pressure rise simultaneously, cause the linkage of steering pressure and brake-pressure poor, the existing weak point of prior art that Here it is.
Summary of the invention
The technical problems to be solved in the utility model, is exactly for the existing deficiency of prior art, and a kind of braking in a turn hydraulic efficiency pressure system is provided, and this system can significantly reduce actuating force, improve the traveling comfort of operation, and the linkage of steering pressure and brake-pressure is good.
This programme is achieved by the following technical measures: this braking in a turn hydraulic efficiency pressure system comprises the working connection communicating with fuel tank, on described working connection, be provided with Hydraulic Pump, on described working connection, be provided with five branch's oil circuits in parallel, described five branch's oil circuits connect respectively tor-con, speed change system, pedal brake mechanism, clutch brake system and turn to control mechanism.
Above-mentioned clutch brake system comprises reducing valve, stopping brake valve and the braking in a turn valve of serial connection in turn.
Above-mentioned pedal brake mechanism is hydraulic braking pedal.
Above-mentioned hydraulic braking pedal is connected with braking in a turn valve by the shuttle valve group of series connection with it.
The above-mentioned control mechanism that turns to is hydraulic pilot handle.
On above-mentioned working connection, be also provided with the precision filter of connecting with Hydraulic Pump.
Above-mentioned Hydraulic Pump is speed change steering pump.
Between above-mentioned working connection and tor-con, be connected with main safety valve.
The beneficial effects of the utility model:
(1) adopt hydraulic pilot handle control steering swivel system, handle steering effort little, handling comfort is high;
(2) brake-pressure is subject to the control of steering pressure, and the linkage of steering pressure and brake-pressure is good;
(3) whole system does not have mechanical linkage, simple in structure;
(4) this system only need couple together each hydraulic fluid port with flexible pipe, has saved the burn in period that in prior art, mechanical linkage spends, and has improved work efficiency.
Brief description of the drawings
Fig. 1 is the schematic diagram that turns to hydraulic braking system in prior art.
Fig. 2 is the schematic diagram of the utility model detailed description of the invention.
In figure, 1-speed change steering pump, 2-precision filter, 3-main safety valve, 4-reducing valve, 5-braking in a turn valve, 6-fuel tank, 7-speed change system, 8-tor-con, 9-stopping brake valve, 10-hydraulic braking pedal, 11-hydraulic pilot handle, 12-shuttle valve group, 13-braking in a turn valve.
Detailed description of the invention
For clearly demonstrating the technical characterstic of this programme, below by detailed description of the invention, and in conjunction with its accompanying drawing, this programme is set forth.
Braking in a turn valve: control the pressure of Vehicular turn power-transfer clutch and brake coupling, realize engagement and the disconnection of power-transfer clutch, finally realize turning and the braking of vehicle.
Pilot handle: a kind of direct proportion reducing valve, delivery pressure increases along with the increase of pilot handle pivot angle.
A kind of braking in a turn hydraulic efficiency pressure system, as shown in the figure, it comprises the working connection communicating with fuel tank 6, on described working connection, is connected with in turn Hydraulic Pump and precision filter 2 along the flow direction of hydraulic oil, this Hydraulic Pump is speed change steering pump 1.Be positioned at and on the working connection after precision filter 2, be provided with five branch's oil circuits in parallel, described five branch's oil circuits connect respectively tor-con 8, speed change system, pedal brake mechanism, clutch brake system and turn to control mechanism, between working connection and tor-con 8, are connected with main safety valve 3.
Wherein, clutch brake system comprises reducing valve 4, stopping brake valve 9 and the braking in a turn valve 13 of serial connection in turn, pedal brake mechanism is hydraulic braking pedal 10, hydraulic braking pedal 10 is connected with braking in a turn valve 13 by the shuttle valve group 12 of series connection with it, and turning to control mechanism is hydraulic pilot handle 11.
After cycling start, speed change steering pump 1 is from fuel tank 6 oil suctions, and pressure oil is through being provided with the precision filter 2 of by-pass collar, and after precision filter 2, pressure oil is divided into five branch's oil circuits: first branch's oil circuit pressure oil removes tor-con 8 by main safety valve 3; Second branch's oil circuit pressure oil removes speed change system 7; The 3rd branch's oil circuit pressure oil enters stopping brake valve 9 by reducing valve 4, then enter braking in a turn valve 13, pressure oil directly enters left brake coupling (LB) and right brake coupling (RB) after braking in a turn valve 13, and pressure reaches the force value that system sets, and brake coupling is thrown off completely; The 4th branch's oil circuit pressure oil connects hydraulic braking pedal 10, and while not stepping on hydraulic braking pedal 10, pressure oil blocks the oil inlet place at hydraulic braking pedal 10, and the function of hydraulic braking pedal 10 is to realize the braking of vehicle; Quintafurcation oil circuit pressure oil connects hydraulic pilot handle 11, and hydraulic pilot handle 11 is for controlling turning to of vehicle.
As an example of left steering example (right steering in like manner), in the time of operating hydraulically operated pilot handle 11, the pressure oil hydraulic pilot handle 11 of flowing through, then enter into braking in a turn valve 13 by shuttle valve group 12, after braking in a turn valve 13, directly enter into left steering power-transfer clutch (LC), in the time that left steering power-transfer clutch is full of oil, left steering clutch pressure starts to rise, and left steering power-transfer clutch is slowly thrown off; Continue operating hydraulically operated pilot handle 11 to certain position, now, left steering clutch pressure reaches certain value (size of this pressure design value is determined by the response pressure of steering clutch), and steering clutch separates completely, this process implementation vehicle large radius turn; Continue operating hydraulically operated pilot handle 11, left steering clutch pressure continues to rise, and now the feedback pressure of left steering power-transfer clutch promotes left brake spool and moves downward, and left brake coupling is slowly connected with fuel tank 6, brake coupling pressure starts to decline, and brake coupling slowly engages; Continue operating hydraulically operated pilot handle 11 to range, now left steering clutch pressure reaches the maxim (size of this pressure design value is determined by the pressure spring of brake spool) of default, brake-pressure reduces to zero, and brake coupling engages completely, and this process implementation vehicle turns little curved.
In the time stepping on hydraulic braking pedal 10, pressure oil enters into shuttle valve group 12, enter into braking in a turn valve 13 by shuttle valve group 12, pressure oil promotes left and right brake spool and moves downward, the upper connection of left and right brake spool, left brake coupling and right brake coupling are all connected with fuel tank 6, and the pressure of left brake coupling and right brake coupling starts to decline, brake coupling is in partly separating half engagement state, and vehicle is in semi-brake half walking states; Continue to step on hydraulic braking pedal 10 to maximum position, now the pressure of left brake coupling and right brake coupling reduces to zero, and brake coupling engages completely, and vehicle is realized braking completely.
Beneficial effect of the present invention
(1) adopt hydraulic pilot handle 11 to control steering swivel system, the spring force that only need overcome hydraulic pilot handle 11 when operation just can be realized turning to of vehicle, therefore handles steering effort little, and handling comfort is high;
(2) be subject to the control of steering pressure due to brake-pressure, therefore the linkage of steering pressure and brake-pressure is good;
(3) whole system does not have mechanical linkage, therefore relatively simple for structure;
(4) in prior art, mechanical linkage need to spend long time and go debugging, and this system only need couple together each hydraulic fluid port with flexible pipe, has therefore improved work efficiency.
In the utility model, can pass through existing techniques in realizing without the technical characterictic of describing, not repeat them here.The foregoing is only preferred embodiment of the present utility model; the utility model is not limited in above-mentioned detailed description of the invention; variation, remodeling, interpolation or replacement that those of ordinary skill in the art make in essential scope of the present utility model, also should belong to protection domain of the present utility model.

Claims (8)

1. a braking in a turn hydraulic efficiency pressure system, it comprises the working connection communicating with fuel tank, on described working connection, be provided with Hydraulic Pump, it is characterized in that: on described working connection, be provided with five branch's oil circuits in parallel, described five branch's oil circuits connect respectively tor-con, speed change system, pedal brake mechanism, clutch brake system and turn to control mechanism.
2. braking in a turn hydraulic efficiency pressure system according to claim 1, is characterized in that: described clutch brake system comprises reducing valve, stopping brake valve and the braking in a turn valve of serial connection in turn.
3. braking in a turn hydraulic efficiency pressure system according to claim 2, is characterized in that: described pedal brake mechanism is hydraulic braking pedal.
4. braking in a turn hydraulic efficiency pressure system according to claim 3, is characterized in that: described hydraulic braking pedal is connected with braking in a turn valve by the shuttle valve group of series connection with it.
5. according to the braking in a turn hydraulic efficiency pressure system described in claim 1,2,3 or 4, it is characterized in that: described in to turn to control mechanism be hydraulic pilot handle.
6. braking in a turn hydraulic efficiency pressure system according to claim 5, is characterized in that: on described working connection, be also provided with the precision filter of connecting with Hydraulic Pump.
7. braking in a turn hydraulic efficiency pressure system according to claim 6, is characterized in that: described Hydraulic Pump is speed change steering pump.
8. braking in a turn hydraulic efficiency pressure system according to claim 1, is characterized in that: between described working connection and tor-con, be connected with main safety valve.
CN201420285052.3U 2014-05-30 2014-05-30 Steering and braking hydraulic system Expired - Fee Related CN203832474U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420285052.3U CN203832474U (en) 2014-05-30 2014-05-30 Steering and braking hydraulic system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420285052.3U CN203832474U (en) 2014-05-30 2014-05-30 Steering and braking hydraulic system

Publications (1)

Publication Number Publication Date
CN203832474U true CN203832474U (en) 2014-09-17

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Application Number Title Priority Date Filing Date
CN201420285052.3U Expired - Fee Related CN203832474U (en) 2014-05-30 2014-05-30 Steering and braking hydraulic system

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106678359A (en) * 2016-12-21 2017-05-17 山推工程机械股份有限公司 Electric-hydraulic cooperative control type speed changing system for bulldozer
CN107600174A (en) * 2017-10-18 2018-01-19 深圳市招科智控港口科技有限公司 Unmanned tractor fluid-link steering and brakes
CN107891854A (en) * 2017-12-14 2018-04-10 湖北先行专用汽车有限公司 A kind of automobile bidirectional driving braking clutch system
CN114852025A (en) * 2022-06-21 2022-08-05 山推工程机械股份有限公司 Auxiliary braking control system for pure electric loader

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106678359A (en) * 2016-12-21 2017-05-17 山推工程机械股份有限公司 Electric-hydraulic cooperative control type speed changing system for bulldozer
CN106678359B (en) * 2016-12-21 2018-06-15 山推工程机械股份有限公司 Soil-shifting mechanical electronic hydraulic Collaborative Control speed change system
CN107600174A (en) * 2017-10-18 2018-01-19 深圳市招科智控港口科技有限公司 Unmanned tractor fluid-link steering and brakes
CN107891854A (en) * 2017-12-14 2018-04-10 湖北先行专用汽车有限公司 A kind of automobile bidirectional driving braking clutch system
CN114852025A (en) * 2022-06-21 2022-08-05 山推工程机械股份有限公司 Auxiliary braking control system for pure electric loader
CN114852025B (en) * 2022-06-21 2023-07-07 山推工程机械股份有限公司 Auxiliary braking control system for pure electric loader

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140917