CN202743228U - Control device of hydraulic brake of dump truck for heavy ore - Google Patents
Control device of hydraulic brake of dump truck for heavy ore Download PDFInfo
- Publication number
- CN202743228U CN202743228U CN 201220273666 CN201220273666U CN202743228U CN 202743228 U CN202743228 U CN 202743228U CN 201220273666 CN201220273666 CN 201220273666 CN 201220273666 U CN201220273666 U CN 201220273666U CN 202743228 U CN202743228 U CN 202743228U
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- brake
- valve
- hydraulic
- negative pressure
- control device
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- Expired - Lifetime
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Abstract
The utility model relates to a control device of a hydraulic brake of a dump truck for heavy ore, belonging to the field of the dump truck for the heavy ore. In the utility model, a negative pressure valve is arranged between a hydraulic pump and a brake pedal valve. According to the utility model, as the negative pressure valve is arranged between the hydraulic pump and the brake pedal valve, hydraulic oil in a brake can smoothly return to a hydraulic oil tank when the braking is released, and the wear of a brake pad of the brake can be effectively reduced.
Description
Technical field
The utility model relates to a kind of heavy mining truck control device for hydraulic brake, belongs to the self-discharging vehicle for rigid mining field.
Background technology
Heavy mining truck belongs to haul truck, be mainly used in the ore in mine, the coal in colliery and the transportation of other bulk cargo, heavy mining truck mainly is comprised of rigid-frame, driving engine, transmission gearbox, back axle assembly, operator's compartment assembly, brake system etc., wherein brake system is the important component part of heavy mining truck, especially the safety and reliability of heavy mining truck is had vital impact.
The little tonnage vehicle of haul truck generally adopts Pneumatic braking system at present, the dumping car that tonnage is larger uses hydraulic brake system, Pneumatic braking system makes pressurized air enter pneumatic apparatus by the push down on the pedal brake activation valve and makes car brakeing, the Pneumatic braking system element is more, pipeline connects complexity and lock torque is little, is not suitable for using at the large-tonnage vehicle.The hydraulic brake system lock torque is large, compact conformation, generally use on heavy mining truck, but heavy mining truck is operated in glory-hole mostly, environment for use is abominable, drg oil pocket inside brake pressure in use often occurring can not discharge fully, cause brake shoe and brake disc not to break away from fully, greatly shortened the service life of brake shoe.
Summary of the invention
The purpose of this utility model is to provide a kind of heavy mining truck control device for hydraulic brake, and drg inside brake pressure discharges rapidly when removing so that brake, and brake shoe and brake disc break away from fully, have improved the service life of brake shoe.
Technical solution:
The utility model comprises: Hydraulic Pump, brake pedal valve also are provided with negative pressure valve between described Hydraulic Pump and the described brake pedal valve.
Be provided with flow-controlling gate between the further Hydraulic Pump of the utility model and negative pressure valve the first import.
Further negative pressure valve the second outlet of the utility model is connected with hydraulic reservoir, also is provided with the detection of negative pressure mouth on the negative pressure valve.
The further brake pedal valve of the utility model respectively with front brake accumulator be connected brake accumulator and be connected, energy storage worked when Hydraulic Pump loses efficacy as the back-up power source of dumping car brake equipment.
Hydraulic Pump described in the utility model is constant pressure variable displacement pump, and the propulsion source of steady pressure is provided for brake system; Fuel tank is the device of storage hydraulic oil; Arranging of front brake accumulator check valve and rear brake accumulator check valve can prevent front wheel brake hydraulic oil and the mutual interference of trailing wheel brake fluid pressure oil phase; The brake pedal valve is the executive component of dumping car braking, and the size of its delivery pressure is relevant with the angle of pedal; Front-wheel brake and rear wheel brake piston when obtaining pressure oil stretches out and makes wheel braking, and brake plunger is retracted without pressure oil the time.
The utility model principle of work: in dumping car running and step on the pedal of brake pedal valve, pressure oil is front brake and rear brake fuel feeding through the brake pedal valve, and this moment, front-wheel and trailing wheel were braked simultaneously; When brake off, the brake pedal valve resets, pressure oil in the drg is discharged into hydraulic reservoir through the brake pedal valve, because this control setup is provided with negative pressure valve, the Centronics port of negative pressure valve forms a zone of negative pressure when vehicle operating, make drg internal pressure oil very unimpededly get back to hydraulic reservoir, avoid making because leaving residual pressure in the drg rapid wear of brake facing, the size of negative pressure is regulated by flow-controlling gate.
The utility model compared with prior art has following advantages:
1, the utility model is by arranging negative pressure valve and flow-controlling gate between the return opening of Hydraulic Pump outlet and brake pedal valve, so that braking when removing drg internal pressure oil very unimpededly get back to hydraulic reservoir, avoid making because leaving residual pressure in the drg rapid wear of brake facing.
2, the utility model only need be set up negative pressure valve and flow-controlling gate, need not existing brake equipment is done large improvement, and method is simple, easily realization.
Description of drawings
Fig. 1 is the utility model control device for hydraulic brake schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Referring to shown in Figure 1, the utility model comprises hydraulic reservoir 1, Hydraulic Pump 2, front brake accumulator check valve 3, rear brake accumulator check valve 4, front brake accumulator 5, rear brake accumulator 6, brake pedal valve 7, front-wheel brake 8, rear wheel brake 9, negative pressure valve 10 and flow-controlling gate 11, described Hydraulic Pump 2 delivery ports respectively through front brake accumulator check valve 3 be connected brake accumulator check valve 4 and be connected with brake pedal valve 7, described brake pedal valve 7 delivery ports are connected with rear wheel brake with front-wheel brake 8 respectively and are connected, be provided with flow-controlling gate 11 between described Hydraulic Pump 2 and negative pressure valve 10 first imports, negative pressure valve 10 second outlets are connected with hydraulic reservoir 1, also be provided with the detection of negative pressure mouth on the negative pressure valve 10, described brake pedal valve 7 respectively with front brake accumulator 5 and rear brake accumulator 6.
The below describes working process of the present utility model in detail:
(1) dumping car is at flameout state, this moment engine stoping operation, hydraulic efficiency pressure system is exported without pressure oil, brake gear is without any action.
(2) the service brake state is implemented in dumping car operation, and Engine driven Hydraulic Pump 2 runnings were stepped on brake pedal valve 7 rear pressure oils and entered respectively front-wheel brake 8 and rear wheel brake 9 this moment, and vehicle is implemented service brake.
(3) engine running, the service brake disarm state, behind the pedal of loosen the brake valve 7, brake pedal valve 7 resets, front-wheel brake 8 and rear wheel brake 9 internal pressure oil are discharged into hydraulic reservoir 1 through brake pedal valve 7, the sub-fraction hydraulic oil of simultaneously Hydraulic Pump 2 outputs is got back to hydraulic reservoir 1 through flow control method 11 and negative pressure valve 10, at zone of negative pressure of the R of negative pressure valve 10 interruption-forming, make the oil return of brake pedal valve 7 very unimpededly get back to hydraulic reservoir 1, avoid making because leaving residual pressure in the drg rapid wear of brake facing.
Claims (4)
1. heavy mining truck control device for hydraulic brake, Hydraulic Pump (2), brake pedal valve (7) is characterized in that: also be provided with negative pressure valve (10) between described Hydraulic Pump (2) and the described brake pedal valve (7).
2. heavy mining truck control device for hydraulic brake according to claim 1 is characterized in that: be provided with flow-controlling gate (11) between described Hydraulic Pump (2) and negative pressure valve (10) first imports.
3. heavy mining truck control device for hydraulic brake according to claim 1 and 2 is characterized in that: negative pressure valve (10) second outlets are connected with hydraulic reservoir (1), and negative pressure valve also is provided with the detection of negative pressure mouth on (10).
4. heavy mining truck control device for hydraulic brake according to claim 1 is characterized in that: described brake pedal valve (7) respectively with front brake accumulator (5) and rear brake accumulator (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220273666 CN202743228U (en) | 2012-06-01 | 2012-06-01 | Control device of hydraulic brake of dump truck for heavy ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220273666 CN202743228U (en) | 2012-06-01 | 2012-06-01 | Control device of hydraulic brake of dump truck for heavy ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202743228U true CN202743228U (en) | 2013-02-20 |
Family
ID=47702666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220273666 Expired - Lifetime CN202743228U (en) | 2012-06-01 | 2012-06-01 | Control device of hydraulic brake of dump truck for heavy ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202743228U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111038468A (en) * | 2019-12-20 | 2020-04-21 | 内蒙古北方重型汽车股份有限公司 | Residual pressure releasing device of electric drive mining dump truck brake and braking method thereof |
-
2012
- 2012-06-01 CN CN 201220273666 patent/CN202743228U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111038468A (en) * | 2019-12-20 | 2020-04-21 | 内蒙古北方重型汽车股份有限公司 | Residual pressure releasing device of electric drive mining dump truck brake and braking method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130220 |
|
| CX01 | Expiry of patent term |