CN204124120U - The emergency brake system of full hydraulic drive roller - Google Patents

The emergency brake system of full hydraulic drive roller Download PDF

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Publication number
CN204124120U
CN204124120U CN201420396267.2U CN201420396267U CN204124120U CN 204124120 U CN204124120 U CN 204124120U CN 201420396267 U CN201420396267 U CN 201420396267U CN 204124120 U CN204124120 U CN 204124120U
Authority
CN
China
Prior art keywords
brake
servo
driving pump
valve
servovalve
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
CN201420396267.2U
Other languages
Chinese (zh)
Inventor
王玉玲
刘永坚
孙文勇
冯立波
许东东
张照良
靳鹏飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Lingong Construction Machinery Co Ltd
Original Assignee
Shandong Lingong Construction Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong Lingong Construction Machinery Co Ltd filed Critical Shandong Lingong Construction Machinery Co Ltd
Priority to CN201420396267.2U priority Critical patent/CN204124120U/en
Application granted granted Critical
Publication of CN204124120U publication Critical patent/CN204124120U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of emergency brake system of full hydraulic drive roller, belong to engineering machinery field.Comprise servo-cylinder, drg, brake activation valve, speed-change valve, driving pump and running motor, servo-cylinder controls the change of driving pump swash plate angle thus the delivery rate of control pump, drg is used for parking and emergency braking, brake activation valve is used for control brake, speed-change valve controls the variable of motor, realize the switching that roller travels shelves and work shelves, also comprise servovalve, two servo hydraulic fluid ports of driving pump are connected respectively with two hydraulic fluid ports of servovalve, when needs emergency braking, servo valve control driving pump swash plate forces back meta.The utility model is mainly used on hydraulic road roller, and whether it extends the service life of Parking Brake and can also test Parking Brake when being necessary and can normally use.

Description

The emergency brake system of full hydraulic drive roller
Technical field
The utility model belongs to builds the road by engineering machinery field, specifically, particularly relates to a kind of emergency brake system of full hydraulic drive roller.
Background technology
The hydraulic road roller parking brake existed in the market mostly is multi-disc brake, he unlatching be overcome spring force inside drg by the pressure of hydraulic oil, make without friction between Friction disk, roller can normally travel.Parking Brake also runs in emergency circumstances for vehicle, uses as emergency braking.And the traveling driving pump of hydraulic road roller is manual proportional variable plunger pump at present, when emergency brake of vehicle, pump still has high pressure liquid force feed to export, and motor also just has moment of torsion to export, thus the damage causing Parking Brake too early.
Summary of the invention
The purpose of this utility model is to provide a kind of emergency brake system of full hydraulic drive roller, to overcome in prior art because driving pump during emergency brake of vehicle still has high pressure liquid force feed to export the defect easily causing Parking Brake premature breakdown.
The utility model is achieved through the following technical solutions: a kind of emergency brake system of full hydraulic drive roller, comprise servo-cylinder, drg, brake activation valve, speed-change valve, driving pump and running motor, servo-cylinder controls the change of driving pump swash plate angle thus the delivery rate of control pump, drg is used for parking and emergency braking, brake activation valve is used for control brake, speed-change valve controls the variable of motor, realize the switching that roller travels shelves and work shelves, also comprise servovalve, two servo hydraulic fluid ports of driving pump are connected respectively with two hydraulic fluid ports of servovalve, when needs emergency braking, servo valve control driving pump swash plate forces back meta.
Servovalve is 2/2-way solenoid directional control valve.
Compared with prior art, the beneficial effects of the utility model are:
The utility model is when ensureing the performance of original vehicle each side, extend the service life of Parking Brake and still can test Parking Brake when being necessary and whether can normally use, enhance the safety factor of vehicle, reduce the frequency that consumable accessory is changed.
Accompanying drawing explanation
Fig. 1 is systematic schematic diagram of the present utility model;
Fig. 2 is the I portion enlarged drawing of Fig. 1.
In figure: 1, servo-cylinder; 2, drg; 3, servovalve; 4, brake activation valve; 5, speed-change valve; 6, driving pump; 7, running motor.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, the emergency brake system of full hydraulic drive roller, comprise servo-cylinder 1, drg 2, servovalve 3, brake activation valve 4, speed-change valve 5, driving pump 6 and running motor 7, servo-cylinder 1 controls the change of driving pump 6 swash plate angle thus the delivery rate of control pump, reaches the object of regulation speed; Drg 2 is for parking and emergency braking, and brake activation valve 4 is for control brake 2; Two servo hydraulic fluid ports M4, M5 of driving pump 6 are connected respectively with two hydraulic fluid ports of servovalve 3, and when needs emergency braking, servovalve 3 controls driving pump 6 swash plate and returns meta, in any case operation, driving pump 6 does not all have Power output; Speed-change valve 5 controls motor variable, realizes the switching that roller travels shelves and work shelves; What servovalve 3 adopted is 2/2-way solenoid directional control valve.
Principle of the present utility model: three solenoid control logical relations are as table one.During road roller working state, servovalve 3 is charged, and servo-cylinder 1 both sides oil circuit cuts off, and roller normally can travel according to the instruction of chaufeur; When occurring needing emergency braking, servovalve 3 needs power-off simultaneously, and driving pump 6 swash plate forces back meta, and now running motor 7 would not dynamicly export, and Parking Brake 2 friction lining is protected.
Table one
In addition, whether the utility model can also realize test Parking Brake and can normally use, during detection, servovalve 3 is made to obtain electric, brake activation valve 4 power-off, now operation travels control handle, if roller has the displacement of advancing or retreating, then judge that drg 2 damages, and then judge to need to change drg 2.

Claims (2)

1. the emergency brake system of a full hydraulic drive roller, comprise servo-cylinder (1), drg (2), brake activation valve (4) speed-change valve (5), driving pump (6) and running motor (7), described servo-cylinder (1) controls the change of driving pump (6) swash plate angle thus the delivery rate of control pump, described brake activation valve (4) control brake (2), for parking and emergency braking, described speed-change valve (5) controls the variable of running motor (7), realize the switching that roller travels shelves and work shelves, it is characterized in that: also comprise servovalve (3), two servo hydraulic fluid ports of described driving pump (6) are connected respectively with two hydraulic fluid ports of servovalve (3), when needs emergency braking, servovalve (3) controls driving pump (6) swash plate and forces back meta.
2. the emergency brake system of full hydraulic drive roller according to claim 1, is characterized in that: described servovalve (3) is 2/2-way solenoid directional control valve.
CN201420396267.2U 2014-07-17 2014-07-17 The emergency brake system of full hydraulic drive roller Expired - Fee Related CN204124120U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420396267.2U CN204124120U (en) 2014-07-17 2014-07-17 The emergency brake system of full hydraulic drive roller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420396267.2U CN204124120U (en) 2014-07-17 2014-07-17 The emergency brake system of full hydraulic drive roller

Publications (1)

Publication Number Publication Date
CN204124120U true CN204124120U (en) 2015-01-28

Family

ID=52380503

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420396267.2U Expired - Fee Related CN204124120U (en) 2014-07-17 2014-07-17 The emergency brake system of full hydraulic drive roller

Country Status (1)

Country Link
CN (1) CN204124120U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105370643A (en) * 2015-12-23 2016-03-02 北汽福田汽车股份有限公司 Engineering machinery and closed type hydraulic system thereof
CN106402063A (en) * 2016-12-20 2017-02-15 徐工消防安全装备有限公司 Walking control valve assembly, hydraulic closed type walking system and overhead operation platform car

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105370643A (en) * 2015-12-23 2016-03-02 北汽福田汽车股份有限公司 Engineering machinery and closed type hydraulic system thereof
CN106402063A (en) * 2016-12-20 2017-02-15 徐工消防安全装备有限公司 Walking control valve assembly, hydraulic closed type walking system and overhead operation platform car
CN106402063B (en) * 2016-12-20 2019-07-26 徐工消防安全装备有限公司 Travelling control valve group, hydraulic closed running gear and aerial working platform vehicle

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150128

Termination date: 20180717

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