CN211765476U - Residual pressure releasing device of electric drive mining dump truck brake - Google Patents
Residual pressure releasing device of electric drive mining dump truck brake Download PDFInfo
- Publication number
- CN211765476U CN211765476U CN201922326089.1U CN201922326089U CN211765476U CN 211765476 U CN211765476 U CN 211765476U CN 201922326089 U CN201922326089 U CN 201922326089U CN 211765476 U CN211765476 U CN 211765476U
- Authority
- CN
- China
- Prior art keywords
- brake
- residual pressure
- hydraulic
- valve
- control switch
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a residual pressure release of electric drive mining dump truck stopper, include: the device comprises a hydraulic control switch valve, a throttling hole, a residual pressure release switch and a pressure gauge; the input port of the hydraulic control switch valve is used for connecting a first output port of the pedal brake valve, and the output port of the hydraulic control switch valve is used for connecting a hydraulic oil tank; the input port of the throttling hole is used for connecting a rear brake, and the output port of the throttling hole is connected with a pilot port of the hydraulic control switch valve through a hydraulic pipeline; the residual pressure release switch and the pressure gauge are respectively connected with the input port of the throttling hole through a hydraulic pipeline. The utility model discloses can make the interior residual pressure of back stopper can release fast, and can not accumulate for braking system safe and reliable has also improved the driving safety of whole car simultaneously.
Description
Technical Field
The utility model belongs to electric drive mining dump truck field, concretely relates to electric drive mining dump truck stopper residual pressure release.
Background
The electric drive mining dump truck belongs to an off-highway dump truck and is mainly used for transporting ores and mineral aggregates in large-scale surface mines, and the electric drive mining dump truck mainly comprises a truck frame, an engine, a generator, a wheel motor, a cab assembly, a braking device and the like, wherein the braking device is an important component of the electric drive mining dump truck and particularly has important influence on the driving safety and the reliability of the dump truck.
Fig. 1 is a schematic structural diagram of a hydraulic brake device of an electric drive mining dump truck in the prior art.
The electric drive mining dump truck hydraulic braking device comprises: hydraulic oil tank 101, hydraulic pump 102, rear brake check valve 103, front brake check valve 104, foot brake pedal valve 107, rear brake 108, front brake 109, rear brake accumulator 110, front brake accumulator 111, and corresponding brake disc, hydraulic lines. An input port of a hydraulic pump 102 is connected with a hydraulic oil tank 101 through a hydraulic pipeline, an output port of the hydraulic pump 102 is respectively connected with input ports of a rear brake energy accumulator one-way valve 103 and a front brake energy accumulator one-way valve 104 through hydraulic pipelines, an output port of the rear brake energy accumulator one-way valve 103 is connected with a first input port of a foot brake pedal valve 107 through a hydraulic pipeline, and a first output port of the foot brake pedal valve 107 is connected with a rear brake 108 through a hydraulic pipeline; the output port of the front brake accumulator check valve 104 is connected to the second input port of the foot brake pedal valve 107 via a hydraulic line, and the second output port of the foot brake pedal valve 7 is connected to the front brake 109 via a hydraulic line.
The rear brake accumulator 110 is connected to a first input of the foot brake pedal valve 107 via a hydraulic line, and the front brake accumulator 111 is connected to a second input of the foot brake pedal valve 107 via a hydraulic line.
The hydraulic pump 102 is a constant pressure variable pump, is installed at a power output port of the engine, converts mechanical energy of the engine into pressure energy of liquid, is a power device of the brake system, and provides a power source of stable pressure for the entire brake system. The hydraulic oil tank 101 is a device for storing hydraulic oil, and also plays a role in dissipating heat of the whole brake system; the front brake check valve 104 and the rear brake check valve 103 can prevent the front wheel brake hydraulic oil and the rear wheel brake hydraulic oil from interfering with each other; the foot brake pedal valve 107 is an operating element of vehicle brake, and is composed of two mutually independent pilot pressure reducing valves, and can be operated by pedal manpower, and can also be controlled by applying pressure oil through a pilot oil port, when the front wheel brake and the rear wheel brake do not apply pressure oil, the brake piston is reset to be separated from the wheel, the wheel can roll, and the pressure oil is obtained to push the brake piston to implement brake, and the front brake energy accumulator 111 and the rear brake energy accumulator 110 are used as standby power sources of the vehicle brake to provide power sources for wheel brake.
When the foot brake pedal valve 107 is stepped on, the hydraulic pump 102 enables high-pressure oil to enter the foot brake pedal valve 107 through the rear brake one-way valve 103 and the front brake one-way valve 104 respectively, the high-pressure oil enters the rear brake 108 through the first output port and enters the front brake 109 through the second output port, the brakes (the rear brake 108 and the front brake 109) push brake pistons of the front wheel and the rear wheel to move, and the brake pistons enable friction plates to be tightly pressed on a brake disc, so that the braking effect is achieved.
The front wheel of the electric drive mining dump truck has low rotating speed, so that the electric drive mining dump truck is not easy to generate heat during driving, but the rear wheel of the electric drive mining dump truck is driven by a motor, and a brake disc is directly arranged on a motor driving shaft, so that the rotating speed of the brake disc is very high; in winter in the north, due to low air temperature, the viscosity of hydraulic oil is high, and in addition, a pipeline from a foot brake pedal valve 107 to a rear brake 108 is long, when the foot brake pedal valve 107 is released, certain residual pressure is easily generated in the rear brake 108, or the time required for completely releasing the pressure after a driver releases the brake pedal is very long, the residual pressure makes a brake piston difficult to reset or needs long time for resetting, so that the contact between a friction plate in the brake and a brake disc cannot be separated in time, due to the fact that the rotating speed of the brake disc is very high, the rear brake disc is easy to catch fire due to high friction temperature, and cables, pipelines and the like in a rear wheel are damaged due to fire when the rear brake disc is serious, and great potential safety hazards are brought.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electric drive mining dump truck stopper residual pressure release, through the improvement to the primary structure for residual pressure in the back stopper can release fast, and can not accumulate, makes braking system safe and reliable, has also improved the driving safety of whole car simultaneously.
In order to achieve the above object, the utility model uses the technical solution that:
electric drive mining dump truck brake residual pressure release device includes: the device comprises a hydraulic control switch valve, a throttling hole, a residual pressure release switch and a pressure gauge; the input port of the hydraulic control switch valve is used for connecting a first output port of the pedal brake valve, and the output port of the hydraulic control switch valve is used for connecting a hydraulic oil tank; the input port of the throttling hole is used for connecting a rear brake, and the output port of the throttling hole is connected with a pilot port of the hydraulic control switch valve through a hydraulic pipeline; the residual pressure release switch and the pressure gauge are respectively connected with the input port of the throttling hole through a hydraulic pipeline.
Further, a residual pressure relief valve is connected between the foot brake pedal valve and the rear brake.
Furthermore, the input port of the hydraulic control switch valve is connected with the first output port of the foot brake pedal valve through a hydraulic pipeline, and the output port of the hydraulic control switch valve is connected with a hydraulic oil tank through a hydraulic pipeline.
Furthermore, the input port of the throttling hole is connected with the rear brake through a hydraulic pipeline, and the output port of the throttling hole is connected with the pilot port of the hydraulic control switch valve through the hydraulic pipeline, so that the throttling hole is communicated with the hydraulic oil tank.
Further, the orifice is a damper hole.
Compared with the prior art, the utility model have following advantage:
1. the utility model discloses an increase residual pressure release between foot brake pedal valve and back stopper for residual pressure in the back stopper can release fast, and can not accumulate, makes braking system safe and reliable, has also improved the driving safety nature of whole car simultaneously, is difficult to take place because of the accident that the brake disc frictional heating catches fire.
2. The utility model discloses only need add elements such as the remaining pressure release of stopper, hose, joint, need not to do big improvement to current controlling means, the method is simple, realize easily.
Drawings
FIG. 1 is a schematic structural diagram of a hydraulic brake device of an electric drive mining dump truck in the prior art;
fig. 2 is a use state diagram of the residual pressure releasing device of the brake of the medium electric drive mining dump truck of the utility model.
Detailed Description
The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
The utility model discloses increased electric drive mining dump truck stopper residual pressure release device (residual pressure relief valve 201) on electric drive mining dump truck hydraulic braking system, residual pressure relief valve 201 sets up between foot brake pedal valve 107 and rear brake 108, and residual pressure relief valve 201 includes: a hydraulic control switch valve 2011, an orifice 2012, a residual pressure release switch 2013 and a pressure gauge 2014; the input port of the hydraulic control switching valve 2011 is connected to the first output port of the foot brake pedal valve 107 through a hydraulic line, and the output port of the hydraulic control switching valve 2011 is connected to the hydraulic oil tank 101 through a hydraulic line.
An input port of the orifice 2012 is connected with the rear brake 108 through a hydraulic pipeline, and an output port of the orifice 2012 is connected with a pilot port of a hydraulic control switch valve 2011 through a hydraulic pipeline, so that the orifice 2012 is communicated with the hydraulic oil tank 101; the aperture size of orifice 2012 is 1mm, and when not carrying out the braking, communicates the fluid and the hydraulic tank 101 of rear brake 108 for the residual pressure in rear brake 108 is released completely.
A residual pressure release switch 2013 for detecting a residual pressure in the rear brake 108; residual pressure release switch 2013 and pressure gauge 2014 are connected to the input port of orifice 2012 through hydraulic lines, respectively.
In winter or cold regions, the temperature is reduced to increase the viscosity of the hydraulic oil, and the foot brake valve 107 is installed in the cab, so that the foot brake pedal valve 107 is far away from the rear brake 108, the front brake 109 and the hydraulic oil tank 101, the hydraulic pipeline is long, the flow of the hydraulic oil is small, residual pressure is easily generated in the rear brake 108 and the front brake 109, and the residual pressure release valve 201 is used for eliminating the residual pressure in the rear brake 108. The working principle is as follows: when residual pressure is generated in the rear brake 108, the residual pressure is released into the hydraulic oil tank 101 through the throttle hole 2012, so that the hydraulic oil in the rear brake 108 is always ensured to be communicated with the hydraulic oil tank 101, the generated residual pressure is completely released, and until the hydraulic control switch valve 2011 cuts off the passage between the throttle hole 2012 and the hydraulic oil tank 101 in the next braking process. The residual pressure release switch 2013 is used for detecting residual pressure in the rear brake 8, and if the residual pressure is higher than a set value 30PSI of the residual pressure release switch 2013, the residual pressure release switch 2013 outputs a signal to a driving alarm signal to remind a driver of stopping for maintenance. The front brake 109 does not damage the front brake 109 even with residual pressure due to the slower rotation of the front brake disc.
The braking method of the residual pressure releasing device of the electric drive mining dump truck brake comprises the following specific steps:
step 1: when the vehicle is in a braking state, the engine is operated, the brake pedal of the foot brake pedal valve 107 is pressed, hydraulic oil enters the rear brake 108 and the residual pressure release valve 201 through the first output port of the foot brake pedal valve 107, and hydraulic oil enters the front brake 109 through the second output port of the foot brake pedal valve 107; the pressure oil introduced into the residual pressure relief valve 201 acts on the pilot port of the pilot-operated switching valve 2011 and the input port of the orifice 2012;
the hydraulic oil enters the rear brake 108 and the front brake 109 to realize the braking effect of the vehicle, and the specific braking force is proportional to the angle of stepping on the brake pedal.
When the vehicle is in a flameout state, the engine does not run at the moment, so that no pressure oil exists in the brake system, and the whole brake system does not work.
When the vehicle is in a starting state, the engine drives the hydraulic pump 102 to operate and output hydraulic oil, the hydraulic oil enters the rear brake accumulator 110 through the rear brake one-way valve 103, the hydraulic oil enters the front brake accumulator 111 through the front brake one-way valve 104, and the pressure is continuously increased and maintained to the set value 240bar of the hydraulic pump 102, meanwhile, the pressure oil enters the first input port and the second input port of the foot brake pedal valve 107, and at the moment, the brake system is in a standby working state.
Step 2: because the throttle hole 12 is only a damping hole of 1mm, the input port pressure of the throttle hole 12 is increased, the hydraulic control switch valve 2011 is operated at an upper position, the hydraulic oil entering the hydraulic oil tank 101 through the throttle hole 2012 is cut off, the vehicle is in a braking state at this time, the pressure gauge 2014 can display the hydraulic oil pressure of the rear brake 108 at this time, and the residual pressure release switch 2013 outputs an electric signal to a vehicle control system.
And step 3: when the vehicle is in a brake release state after the brake pedal of the foot brake pedal valve 107 is released, the brake pedal valve 107 cuts off the hydraulic oil entering the rear brake 108 and the front brake 109, simultaneously the rear brake 108 and the front brake 109 are communicated with the hydraulic oil tank 101 through the brake pedal valve 107, the oil pressure in the rear brake 108 and the front brake 109 is completely released, and the brake is released; the hydraulic oil in the residual pressure release valve 201 connected to the rear brake 108 and connected to the pilot port of the pilot operated switching valve 2011 is also communicated with the hydraulic oil tank 101 to release the hydraulic oil pressure, so that the pilot operated switching valve 2011 operates at the lower position at this time, and the residual pressure in the rear brake 108 is released to the hydraulic oil tank 101 through the pilot operated switching valve 2011.
The terminology used herein is for the purpose of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (5)
1. Electric drive mining dump truck brake residual pressure release device, its characterized in that includes: the device comprises a hydraulic control switch valve, a throttling hole, a residual pressure release switch and a pressure gauge; the input port of the hydraulic control switch valve is used for connecting a first output port of the pedal brake valve, and the output port of the hydraulic control switch valve is used for connecting a hydraulic oil tank; the input port of the throttling hole is used for connecting a rear brake, and the output port of the throttling hole is connected with a pilot port of the hydraulic control switch valve through a hydraulic pipeline; the residual pressure release switch and the pressure gauge are respectively connected with the input port of the throttling hole through a hydraulic pipeline.
2. The electric drive mining dump truck brake residual pressure relief device of claim 1 wherein a residual pressure relief valve is connected between the service brake pedal valve and the rear brake.
3. The electric drive mining dump truck brake residual pressure release device according to claim 1, wherein an input port of the hydraulic control switch valve is connected with a first output port of the foot brake pedal valve through a hydraulic pipeline, and an output port of the hydraulic control switch valve is connected with a hydraulic oil tank through a hydraulic pipeline.
4. The electric drive mining dump truck brake residual pressure release device according to claim 1, characterized in that an input port of the throttle hole is connected with the rear brake through a hydraulic pipeline, and an output port is connected with a pilot port of a hydraulic control switch valve through a hydraulic pipeline, so that the throttle hole is communicated with a hydraulic oil tank.
5. The electric drive mining dump truck brake residual pressure relief device of claim 1 wherein the orifice is a damping orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922326089.1U CN211765476U (en) | 2019-12-20 | 2019-12-20 | Residual pressure releasing device of electric drive mining dump truck brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922326089.1U CN211765476U (en) | 2019-12-20 | 2019-12-20 | Residual pressure releasing device of electric drive mining dump truck brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211765476U true CN211765476U (en) | 2020-10-27 |
Family
ID=72976682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922326089.1U Active CN211765476U (en) | 2019-12-20 | 2019-12-20 | Residual pressure releasing device of electric drive mining dump truck brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211765476U (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 |
-
2019
- 2019-12-20 CN CN201922326089.1U patent/CN211765476U/en active Active
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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203698256U (en) | Special-purpose vehicle braking system | |
| CN105946830B (en) | Brake fluid system and engineering truck | |
| CN103661337A (en) | Method and system for releasing break-down machine parking brake and machine comprising system | |
| CN211765476U (en) | Residual pressure releasing device of electric drive mining dump truck brake | |
| WO2023216746A1 (en) | Braking apparatus for unmanned mining dump truck and braking method therefor | |
| CN109131290A (en) | A kind of novel automobile brake safe system | |
| CN203864675U (en) | Hydraulic braking system for mining dump trucks | |
| CN103253253B (en) | A kind of split type multi-axial cord hydraulic pressure bogie hydraulic brake system | |
| CN101863270A (en) | Hydraulic brake device of dumper for mining | |
| CN206871054U (en) | Quarry tipper hydraulic auxiliary brake system | |
| CN111038468A (en) | Residual pressure releasing device of electric drive mining dump truck brake and braking method thereof | |
| CN202156403U (en) | Electronic travelling crane braking system for mining electric wheeled dumper | |
| CN109649163B (en) | Vehicle traveling system, control method thereof and sanitation vehicle | |
| CN101446350A (en) | Low power hmt with by-pass valve | |
| CN108025733A (en) | Brake apparatus and method | |
| CN106627541A (en) | Automobile active hydraulic braking system | |
| CN205801087U (en) | A kind of driving drill carriage double circuit hydraulic braking system | |
| CN103661340A (en) | Vehicle brake system and vehicle | |
| CN202130442U (en) | Loading and braking device for mining dump truck with electric wheels | |
| CN208278039U (en) | A kind of wet brake system | |
| CN208585227U (en) | A kind of holding brake system of push-rod electric machine control | |
| CN112721890A (en) | Hydraulic braking system of engineering machinery vehicle | |
| KR200469006Y1 (en) | Secondary braking systems for automobiles | |
| CN206107218U (en) | Harmless installation safety auxiliary device of automatically controlled fluid pressure type | |
| CN102350987A (en) | Electronic service braking system for electric wheel mining dump truck |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |