CN117601828A - Brake system for engineering vehicle and mining dump truck - Google Patents
Brake system for engineering vehicle and mining dump truck Download PDFInfo
- Publication number
- CN117601828A CN117601828A CN202311604462.XA CN202311604462A CN117601828A CN 117601828 A CN117601828 A CN 117601828A CN 202311604462 A CN202311604462 A CN 202311604462A CN 117601828 A CN117601828 A CN 117601828A
- Authority
- CN
- China
- Prior art keywords
- valve
- brake
- oil
- port
- communicated
- 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.)
- Pending
Links
- 238000005065 mining Methods 0.000 title claims abstract description 19
- 239000003921 oil Substances 0.000 claims description 405
- 102100039164 Acetyl-CoA carboxylase 1 Human genes 0.000 claims description 23
- 101710190443 Acetyl-CoA carboxylase 1 Proteins 0.000 claims description 23
- 102100021641 Acetyl-CoA carboxylase 2 Human genes 0.000 claims description 23
- 101000677540 Homo sapiens Acetyl-CoA carboxylase 2 Proteins 0.000 claims description 23
- 101000894929 Homo sapiens Bcl-2-related protein A1 Proteins 0.000 claims description 23
- 238000010276 construction Methods 0.000 claims description 21
- 239000010720 hydraulic oil Substances 0.000 claims description 18
- 101100268670 Caenorhabditis elegans acc-3 gene Proteins 0.000 description 9
- 238000001914 filtration Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/36—Other control devices or valves characterised by definite functions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/16—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/168—Arrangements for pressure supply
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/025—Electrically controlled valves
- B60T15/028—Electrically controlled valves in hydraulic systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/04—Driver's valves
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention relates to the technical field of engineering machinery, in particular to a brake system for an engineering vehicle and a mining dump truck. According to the brake system for the engineering vehicle, as the two oil inlets of the first manual self-switching valve are respectively communicated with the first electric proportional brake valve and the first pedal valve, and the two oil inlets of the second manual self-switching valve are respectively communicated with the second electric proportional brake valve and the second pedal valve, the first manual self-switching valve can selectively communicate the first brake oil port A1 with the first electric proportional brake valve or the first pedal valve according to the driving state of the vehicle, and the second manual self-switching valve can selectively communicate the second brake oil port A2 with the second electric proportional brake valve or the second pedal valve according to the driving state of the vehicle, so that the braking purpose of manual driving or automatic driving of the vehicle can be realized. Thereby improving the safety and reliability of driving. Meanwhile, the priority of the manual operation brake is improved.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a brake system for an engineering vehicle and a mining dump truck.
Background
The mining dump truck mainly comprises a diesel engine, a generator, an electric wheel, an electric control system, a hydraulic system, a frame, a suspension, a carriage and the like. The hydraulic system is divided into a plurality of parts such as steering, lifting and braking. Wherein the brake hydraulic system is an important component of the whole vehicle. In order to be safe and reliable and meet the working condition demands, the general mining dump truck has the functions of parking brake, service brake, loading brake, emergency brake and the like.
The existing mining dump truck braking hydraulic system generally comprises a hydraulic oil tank, a hydraulic pump, a filter, a braking valve block, an energy accumulator, a braking pedal valve, a relay valve, a brake disc, a hydraulic pipeline and the like. By stepping on the brake pedal valve, high-pressure oil is distributed to a brake cylinder of the brake from the pedal valve to the brake through a brake valve block, and the friction plate is tightly attached to the brake disc under the pushing of the brake cylinder, so that braking action is realized.
The mining dump truck is widely applied to the earthwork transportation of metallurgical, nonferrous, chemical, coal, building materials, hydropower and other industries, and is a main transportation tool of the large-scale surface mine at present. Many mining dump trucks operate continuously for 24h, and severe working environments such as noise, floating dust, jolt and the like of mines cause great harm to the health of drivers, and particularly, the night, rain and snow weather fields and environments are worse, so that accidents are easy to occur.
Therefore, unmanned control of the mining dump truck appears in the prior art, and the existing braking system for realizing unmanned and unmanned operation generally adopts a proportional pressure reducing valve integrated in a braking valve block, and the original vehicle braking pedal valve is used for realizing braking when the existing mining dump truck is operated by a person. When unmanned is switched, the output pressure of the proportional pressure reducing valve is regulated through the electric signal of the proportional pressure reducing valve, so that the regulation of the braking pressure is realized, and the braking function is realized. When the mining dump truck is unmanned, the fault of the brake hydraulic system can not realize the manned braking, and potential safety hazards exist.
Therefore, a brake system for a construction vehicle is needed to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a brake system for an engineering vehicle and a mining dump truck, which can realize manned braking and unmanned braking and improve safety.
To achieve the purpose, the invention adopts the following technical scheme:
a brake system for a construction vehicle includes:
the brake valve block is provided with a first brake oil port A1 and a second brake oil port A2;
the electric proportional brake valve comprises a first electric proportional brake valve and a second electric proportional brake valve, wherein the first brake oil port A1 is communicated with an oil inlet of the first electric proportional brake valve, and the second brake oil port A2 is communicated with an oil inlet of the second electric proportional brake valve;
the manual-automatic switching valve comprises a first manual-automatic switching valve and a second manual-automatic switching valve, an oil outlet of the first electric proportional brake valve is communicated with a first oil inlet of the first manual-automatic switching valve, and an oil outlet of the second electric proportional brake valve is communicated with a second oil inlet of the second manual-automatic switching valve;
the brake comprises a first brake and a second brake, an oil outlet of the first manual self-switching valve is communicated with a rodless cavity of the first brake, and an oil outlet of the second manual self-switching valve is communicated with a rodless cavity of the second brake;
the double-loop pedal valve group comprises a first pedal valve and a second pedal valve, wherein the first pedal valve and the second pedal valve can synchronously act and send out a human braking signal to the electric proportional braking valve, a first braking oil port A1 is communicated with an oil inlet of the first pedal valve, an oil outlet of the first pedal valve is communicated with a third oil inlet of the first manual self-switching valve, a second braking oil port A2 is communicated with an oil inlet of the second pedal valve, and an oil outlet of the first pedal valve is communicated with a fourth oil inlet of the second manual self-switching valve;
and the hydraulic oil supply structure is communicated with the oil supply port of the brake valve block and is used for supplying oil to the brake.
As a preferable mode of the brake system for a construction vehicle, the brake valve block further has a loading brake oil port A3, a loading brake solenoid valve is further provided in the brake valve block, an oil inlet of the loading brake solenoid valve is communicated with an oil supply port of the brake valve block, an oil outlet of the loading brake solenoid valve is communicated with the loading brake oil port A3, the loading brake oil port A3 is communicated with a pilot end of the second pedal valve, and the second brake is configured to brake the rear wheel.
As a preferable technical solution of the above-mentioned brake system for a construction vehicle, the brake valve block further has an automatic emergency brake oil port A4, a pressure selection valve block is further provided in the brake valve block, an oil inlet of the pressure selection valve block is communicated with the first brake oil port A1 and the second brake oil port A2, an oil outlet of the pressure selection valve block is communicated with the automatic emergency brake oil port A4, the automatic emergency brake oil port A4 is respectively communicated with a pilot end of a first pedal valve and a pilot end of a second pedal valve, and the pressure selection valve block is configured to obtain oil pressures of the first brake oil port A1 and the second brake oil port A2 and close or communicate the automatic emergency brake oil port A4 according to the oil pressures of the first brake oil port A1 and the second brake oil port A2.
As a preferable technical scheme of the brake system for the engineering vehicle, the brake valve block is further provided with an electric emergency brake oil port A5, an electric emergency brake valve is further arranged in the brake valve block, an oil inlet of the electric emergency brake valve is communicated with an oil supply port of the brake valve block, an oil outlet of the electric emergency brake valve is communicated with the electric emergency brake oil port A5, and the electric emergency brake oil port A5 is respectively communicated with a pilot end of the first pedal valve and a pilot end of the second pedal valve.
As a preferable mode of the above-mentioned brake system for a construction vehicle, the brake system for a construction vehicle further includes a first shuttle valve and a second shuttle valve, wherein two oil inlets of the first shuttle valve are respectively communicated with the automatic emergency braking oil port A4 and the electric emergency braking oil port A5, an oil outlet of the first shuttle valve is respectively communicated with one of the oil inlets of the second shuttle valve and a pilot end of the first pedal valve, the other oil inlet of the second shuttle valve is communicated with the loading braking oil port A3, and an oil outlet of the second shuttle valve is communicated with a pilot end of the second pedal valve.
As a preferable technical scheme of the brake system for the engineering vehicle, the hydraulic oil supply structure includes a hydraulic oil tank, a hydraulic pump, a first accumulator and a second accumulator, an oil inlet of the hydraulic pump is communicated with the hydraulic oil tank, an oil outlet of the hydraulic pump is communicated with an oil supply port of the brake valve block, the oil supply port of the brake valve block includes a first oil supply port P1, a second oil supply port ACC1 and a third oil supply port ACC2, the first accumulator is communicated with the second oil supply port ACC1, the second accumulator is communicated with the third oil supply port ACC2, the hydraulic pump is communicated with the first oil supply port P1, the first oil supply port P1 is respectively communicated with the second oil supply port ACC1 and the third oil supply port ACC2, the second oil supply port ACC1 is also respectively communicated with an oil inlet of the pressure selection valve set, the first loading brake port A1 and an oil inlet of the electromagnetic valve set, and the third oil supply port 2 is respectively communicated with the second brake port A2, the electric valve set and the oil inlet of the pressure selection valve set.
As a preferable technical scheme of the braking system for the engineering vehicle, the pressure selection valve group comprises a hydraulic control valve and an automatic emergency braking valve, two oil inlets of the hydraulic control valve are respectively communicated with the first energy accumulator and the second energy accumulator, two hydraulic control ends of the hydraulic control valve are respectively communicated with the first energy accumulator and the second energy accumulator, an oil outlet of the hydraulic control valve is communicated with a pilot end of the automatic emergency braking valve, an oil inlet of the automatic emergency braking valve is selectively communicated with the second oil supply port ACC1 or the third oil supply port ACC2 through a third shuttle valve, and an oil outlet of the automatic emergency braking valve is communicated with the automatic emergency braking oil port A4.
As a preferable embodiment of the brake system for a construction vehicle, a first check valve is provided between the first oil supply port P1 and the second oil supply port ACC1, a second check valve is provided between the first oil supply port P1 and the third oil supply port ACC2, the first check valve allows only oil to flow from the first oil supply port P1 to the second oil supply port ACC1, and the second check valve allows only oil to flow from the first oil supply port P1 to the third oil supply port ACC2.
As a preferable mode of the brake system for a construction vehicle, the hydraulic oil supply structure further includes a third accumulator, the valve block has a fourth oil supply port ACC3, the third accumulator is respectively in communication with the hydraulic pump, the first accumulator, and the second accumulator through the fourth oil supply port ACC3, and the third accumulator is capable of compensating oil for the first accumulator and the second accumulator.
As a preferable technical scheme of the brake system for the engineering vehicle, the brake further comprises a parking brake, a parking brake electromagnetic valve is arranged in the brake valve block, an oil inlet of the parking brake electromagnetic valve is communicated with an oil supply port of the brake valve block, an oil outlet of the parking brake electromagnetic valve is communicated with a parking oil port of the brake valve block, and the parking brake electromagnetic valve is used for controlling the oil supply port of the brake valve block to be communicated with or disconnected from the parking brake.
As a preferable mode of the above-mentioned brake system for a construction vehicle, the brake system for a construction vehicle further includes an emergency brake power unit, a pilot end of the automatic emergency brake valve is further communicated with the emergency brake power unit, the emergency brake power unit is further communicated with the first oil supply port P1, the emergency brake power unit and the pilot end of the automatic emergency brake valve are directly provided with an emergency brake check valve, and the emergency brake check valve only allows oil to flow from the emergency brake power unit to the automatic emergency brake valve.
The invention also provides a mining dump truck, which comprises the system according to any scheme.
The invention has the beneficial effects that:
according to the invention, as the two oil inlets of the first manual self-switching valve are respectively communicated with the first electric proportional brake valve and the first pedal valve, and the two oil inlets of the second manual self-switching valve are respectively communicated with the second electric proportional brake valve and the second pedal valve, the first manual self-switching valve can selectively communicate the first brake oil port A1 with the first electric proportional brake valve or the first pedal valve according to the driving state of the vehicle, and the second manual self-switching valve can selectively communicate the second brake oil port A2 with the second electric proportional brake valve or the second pedal valve according to the driving state of the vehicle, so that the braking purpose of manual driving or automatic driving of the vehicle can be realized. Thereby improving the safety and reliability of driving. Because the double-loop pedal valve group and the electric proportional brake valve act on the brake system for the engineering vehicle simultaneously, when a driver finds that the emergency needs to be braked in the automatic driving process, the lower positions of the first pedal valve and the second pedal valve are communicated, oil directly flows into the manual-automatic switching valve from the double-loop pedal valve group, the valve core of the manual-automatic switching valve is changed to be communicated with a brake after the double-loop pedal valve group works, the double-loop pedal valve group sends out a human braking signal to the electric proportional brake valve, the electric proportional brake valve is in power failure to stop working, and therefore the controller can receive the signal of the working of the double-loop pedal valve group and further control the electric proportional brake valve to stop working, so that the human operation priority is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
Fig. 1 is a hydraulic schematic diagram of a brake system for an engineering vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the internal hydraulic pressure of a brake valve block provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of connection relations among an electric proportional brake valve, a manual-automatic switching valve and a dual-loop pedal valve set according to an embodiment of the present invention.
In the figure:
1. a brake valve block; 11. loading a brake electromagnetic valve; 12. a hydraulic control valve; 13. an automatic emergency brake valve; 14. an electric emergency brake valve; 15. a third one-way valve; 17. a third shuttle valve; 18. a first one-way valve; 19. a second one-way valve; 110. a parking brake solenoid valve; 111. a pressure reducing valve; 112. emergency braking one-way valve; 113. a first manual throttle valve; 114. a second manual throttle valve; 21. a first electric proportional brake valve; 22. a second electric proportional brake valve; 31. a first manual self-switching valve; 32. a second hand-operated self-switching valve; 41. a first brake; 42. a second brake; 43. a parking brake; 51. a first pedal valve; 52. a second pedal valve; 61. a hydraulic oil tank; 62. a hydraulic pump; 63. a first accumulator; 64. a second accumulator; 65. a third accumulator; 66. an oil absorption filter; 67. a high pressure filter; 68. a first filtering one-way valve; 69. a second filtering one-way valve; 7. a first shuttle valve; 8. and a second shuttle valve.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The embodiment of the invention provides a brake system for an engineering vehicle and a mining dump truck, wherein the mining dump truck comprises the brake system for the engineering vehicle. The brake system for the engineering vehicle can realize manual driving braking and automatic driving braking, and improves the driving safety of the mining dump truck.
As shown in fig. 1 to 3, the brake system for the engineering vehicle includes a brake valve block 1, an electric proportional brake valve, a manual-automatic switching valve, a brake, a two-circuit pedal valve group, and a hydraulic oil supply structure, wherein the brake valve block 1 has a first brake oil port A1 and a second brake oil port A2, and the first brake oil port A1 and the second brake oil port A2 are used for oil outflow from the brake valve block 1. The electric proportional brake valve comprises a first electric proportional brake valve 21 and a second electric proportional brake valve 22, wherein a first brake oil port A1 is communicated with an oil inlet of the first electric proportional brake valve 21, and a second brake oil port A2 is communicated with an oil inlet of the second electric proportional brake valve 22. The manual-automatic switching valve comprises a first manual-automatic switching valve 31 and a second manual-automatic switching valve 32, wherein the oil outlet of the first electric proportional brake valve 21 is communicated with the first oil inlet of the first manual-automatic switching valve 31, and the oil outlet of the second electric proportional brake valve 22 is communicated with the second oil inlet of the second manual-automatic switching valve 32; the actuator includes a first actuator 41 and a second actuator 42, the oil outlet of the first hand-operated self-switching valve 31 communicates with the rodless chamber of the first actuator 41, and the oil outlet of the second hand-operated self-switching valve 32 communicates with the rodless chamber of the second actuator 42.
The double-loop pedal valve group comprises a first pedal valve 51 and a second pedal valve 52, the first pedal valve 51 and the second pedal valve 52 can synchronously act and send out a human braking signal to the electric proportional braking valve, a first braking oil port A1 is communicated with an oil inlet of the first pedal valve 51, an oil outlet of the first pedal valve 51 is communicated with a third oil inlet of the first manual switching valve 31, a second braking oil port A2 is communicated with an oil inlet of the second pedal valve 52, and an oil outlet of the first pedal valve 51 is communicated with a fourth oil inlet of the second manual switching valve 32; the hydraulic oil supply structure is communicated with an oil supply port of the brake valve block 1 and used for supplying oil for the brake.
In this embodiment, since the two oil inlets of the first manual self-switching valve 31 are respectively communicated with the first electric proportional brake valve 21 and the first pedal valve 51, and the two oil inlets of the second manual self-switching valve 32 are respectively communicated with the second electric proportional brake valve 22 and the second pedal valve 52, the first manual self-switching valve 31 can selectively communicate the first brake oil port A1 with the first electric proportional brake valve 21 or the first pedal valve 51 according to the driving state of the vehicle, and the second manual self-switching valve 32 can selectively communicate the second brake oil port A2 with the second electric proportional brake valve 22 or the second pedal valve 52 according to the driving state of the vehicle, so that the braking purpose during manual driving or automatic driving of the vehicle can be achieved. Thereby improving the safety and reliability of driving. Because the dual-loop pedal valve group and the electric proportional brake valve act on the brake system for the engineering vehicle simultaneously, when a driver finds that the emergency needs to be braked in the automatic driving process, the lower positions of the first pedal valve 51 and the second pedal valve 52 are communicated, oil directly flows into the manual-automatic switching valve from the dual-loop pedal valve group, the valve core of the manual-automatic switching valve is changed to be communicated with a brake after the dual-loop pedal valve group works, the dual-loop pedal valve group sends out a human braking signal to the electric proportional brake valve, the electric proportional brake valve loses electricity to stop working, and thus a controller can receive the signal of the work of the dual-loop pedal valve group and further control the electric proportional brake valve to stop working, and the human operation priority is improved.
Specifically, the double-loop pedal valve group further comprises a travel switch, the travel switch is turned on after a driver steps on the pedal, so that the controller sends a signal to power off the manual-automatic switching valve and the electric proportional braking valve, the manual-automatic switching valve and the electric proportional braking valve are forcedly switched back to a manned braking state, and the priority of manned operation is guaranteed. The specific construction of the dual circuit pedal valve block is prior art and will not be described in detail herein.
In order to realize parking braking when the vehicle is stopped at a safe position and prevent the vehicle from sliding, in some embodiments, as shown in fig. 1 and 2, the brake further comprises a parking brake 43, a parking brake electromagnetic valve 110 and a pressure reducing valve 111 are arranged in the brake valve block 1, the brake valve block 1 is provided with a parking oil port and an oil return port, an oil inlet of the parking brake electromagnetic valve 110 is communicated with an oil outlet of the pressure reducing valve 111, an oil return port of the parking brake electromagnetic valve 110 is communicated with an oil return port in the brake valve block 1, an oil inlet of the pressure reducing valve 111 is communicated with an oil supply port of the brake valve block 1, and the parking brake electromagnetic valve 110 is used for controlling the oil supply port of the brake valve block 1 to be communicated with or disconnected from the parking brake 43.
Referring to fig. 1 and 2, when parking braking is required, a driver presses a parking brake button, or a controller sends a parking brake electric signal in an unmanned state, the parking brake solenoid valve 110 is powered off, a valve core of the parking brake solenoid valve 110 returns to a natural state under the action of spring force, oil in the parking brake 43 enters the parking brake solenoid valve 110 through a parking oil port on the brake valve block 1, an oil outlet of the parking brake solenoid valve 110 is communicated with an oil tank through an oil return port T1 of the brake valve block 1, at this time, the oil in the parking brake 43 is released from the parking oil port through the brake valve block 1 through a pipeline, and the parking brake 43 applies braking under the action of the spring force. When the parking brake solenoid valve 110 is energized, the oil is depressurized by the depressurization valve 111 and then flows into the parking brake 43 through the parking brake solenoid valve 110 to release the brake.
Because the large-tonnage dump truck has large bearing weight, the loading is completed by a multi-purpose large-tonnage forklift or electric shovel, loading and unloading materials generate great impact on a carriage, and the parking brake 43 is damaged by the independent parking brake, for this purpose, in some embodiments, as shown in fig. 2, the brake valve block 1 is provided with a loading brake oil port A3, a loading brake electromagnetic valve 11 is further arranged in the brake valve block 1, an oil inlet of the loading brake electromagnetic valve 11 is communicated with an oil supply port of the brake valve block 1, an oil outlet of the loading brake electromagnetic valve 11 is communicated with the loading brake oil port A3, the loading brake oil ports A3 are respectively communicated with a pilot end of the second pedal valve 52, and the second brake 42 is used for braking the rear wheel. Therefore, the impact on the whole frame, the vehicle body and key parts when the materials fall down can be relieved.
The driver presses the loading brake button, or the controller sends an electric signal instruction in the unmanned mode, the loading brake electromagnetic valve 11 in the brake valve block 1 is powered on, the loading brake oil port A3 provides oil to the pilot end of the second pedal valve 52, the brake valve core of the second pedal valve 52 is moved, the valve port is opened, the oil enters the second brake 42 through the second manual self-switching valve 32, and the second brake 42 is used for limiting the rotation of the rear wheels, so that the braking of the rear wheels is realized.
In some embodiments, as shown in fig. 1, the hydraulic oil supply structure includes a hydraulic oil tank 61, a hydraulic pump 62, a first accumulator 63, a second accumulator 64, and a third accumulator 65, an oil inlet of the hydraulic pump 62 is communicated with the hydraulic oil tank 61, an oil outlet of the hydraulic pump 62 is communicated with an oil supply port of the brake valve block 1, the oil supply port of the brake valve block 1 includes a first oil supply port P1, a second oil supply port ACC1, a third oil supply port ACC2, and a fourth oil supply port ACC3, the first accumulator 63 is communicated with the second oil supply port ACC1, the second accumulator 64 is communicated with the third oil supply port ACC2, the third accumulator 65 is communicated with the fourth oil supply port ACC3, the first accumulator 63 and the second accumulator 64 supply oil to the first brake 41 and the second brake 42, respectively, and the third accumulator 65 supplies oil to the first accumulator 63 and the second accumulator 64 when the oil in the first accumulator 63 and the second accumulator 64 is insufficient. The hydraulic pump 62 communicates with the first oil supply port P1, the first oil supply port P1 communicates with the second oil supply port ACC1, the third oil supply port ACC2 and the fourth oil supply port ACC3, respectively, such that the hydraulic pump 62 supplies oil to the first accumulator 63, the second accumulator 64 and the third accumulator 65 through the first oil supply port P1, the second oil supply port ACC1 also communicates with the first brake oil port A1 and the oil inlet of the loading brake solenoid valve 11, respectively, and the third oil supply port ACC2 communicates with the second brake oil port A2 and the electric emergency brake valve 14, respectively.
In order to facilitate subsequent maintenance, the first accumulator 63 and the second accumulator 64 are communicated with the oil return port T2 of the brake valve block 1, a first manual throttle valve 113 is arranged between the first accumulator 63 and the oil return port T2, and a second manual throttle valve 114 is arranged between the second accumulator 64 and the oil return port T2, so that when the first accumulator 63 and the second accumulator 64 need maintenance, the first manual throttle valve 113 and the second manual throttle valve 114 are opened, and the oil in the first accumulator 63 and the second accumulator 64 flows back into the oil tank through the oil return port T2.
The hydraulic oil supply structure further comprises an oil suction filter 66 arranged at the oil inlet of the hydraulic pump 62 and a high-pressure filter 67 arranged at the outlet of the hydraulic pump 62, wherein a first filtering check valve 68 is arranged at the oil suction filter 66 in parallel, a second filtering check valve 69 is arranged at the high-pressure filter 67 in parallel, the first filtering check valve 68 only allows oil to flow from the hydraulic oil tank 61 to the hydraulic pump 62, and the second filtering check valve 69 only allows oil to flow from the hydraulic pump 62 to the brake valve block 1.
When the oil pressure of the oil in the first accumulator 63 and the second accumulator 64 is low, the subsequent braking may be disabled, and in order to ensure the safety of the mining dump truck, in some embodiments, as shown in connection with fig. 1 to 3, the brake valve block 1 is provided with an automatic emergency braking oil port A4, a pressure selection valve group is further disposed in the brake valve block 1, an oil inlet of the pressure selection valve group is communicated with the first braking oil port A1 and the second braking oil port A2, an oil outlet of the pressure selection valve group is communicated with the automatic emergency braking oil port A4, and the automatic emergency braking oil port A4 is respectively communicated with a pilot end of the first pedal valve 51 and a pilot end of the second pedal valve 52. The two oil inlets of the pressure selection valve group are respectively communicated with the first braking oil port A1 and the second braking oil port A2, and the pressure selection valve group is configured to acquire the oil pressure of the first braking oil port A1 and the second braking oil port A2 and close or communicate with the automatic emergency braking oil port A4 according to the oil pressure of the first braking oil port A1 and the second braking oil port A2.
The pressure selection valve bank is conducted according to the oil pressure of the oil inlet to determine whether the oil acts on the double-loop pedal valve bank through the automatic emergency braking oil port A4, so that the aim of safe braking can be achieved, braking failure caused by insufficient braking oil for completing a braking task in the driving process is avoided, and driving safety is guaranteed. The pressure selecting valve is always in a working state in the automatic driving or the manned driving process, so that the safety of the personnel and the vehicles can be ensured.
Specifically, as shown in fig. 1 to 3, the pressure selecting valve group includes a pilot operated valve 12 and an automatic emergency brake valve 13, two oil inlets of the pilot operated valve 12 are respectively communicated with a first accumulator 63 and a second accumulator 64, that is, two oil inlets of the pilot operated valve 12 are respectively communicated with a first brake oil port A1 and a second brake oil port A2, and two pilot operated ends of the pilot operated valve 12 are respectively communicated with the first accumulator 63 and the second accumulator 64. For convenience of description, the two oil inlets of the limiting hydraulic control valve 12 are a first hydraulic control oil inlet and a second hydraulic control oil inlet respectively, the two hydraulic control ends of the limiting hydraulic control valve 12 are a first hydraulic control end and a second hydraulic control end respectively, wherein the first hydraulic control oil inlet and the first hydraulic control end are both communicated with the first brake oil port A1, the second hydraulic control oil inlet and the second hydraulic control end are both communicated with the second brake oil port A2, the oil outlet of the hydraulic control valve 12 is communicated with the pilot end of the automatic emergency brake valve 13, when the oil pressure of the second brake oil port A2 is higher than the oil pressure of the first brake oil port A1, the valve core of the hydraulic control valve 12 is pushed upwards, the lower position of the hydraulic control valve 12 is conducted at the moment, and low-pressure oil of the first brake oil port A1 is output to the pilot end of the automatic emergency brake valve 13. When the oil pressure of the first braking oil port A1 is higher than that of the second braking oil port A2, the valve core of the hydraulic control valve 12 is pushed downwards, at this time, the upper position of the hydraulic control valve 12 is conducted, low-pressure oil of the second braking oil port A2 is output to the pilot end of the automatic emergency braking valve 13, and the hydraulic control valve 12 always selects low-pressure oil for output.
In some embodiments, as shown in conjunction with fig. 1 to 3, the braking system for a construction vehicle further includes a first shuttle valve 7 and a second shuttle valve 8, wherein two oil inlets of the first shuttle valve 7 are respectively communicated with the automatic emergency braking oil port A4 and the electric emergency braking oil port A5, an oil outlet of the first shuttle valve 7 is respectively communicated with one oil inlet of the second shuttle valve 8 and a pilot end of the first pedal valve 51, another oil inlet of the second shuttle valve 8 is communicated with the loading braking oil port A3, and an oil outlet of the second shuttle valve 8 is communicated with a pilot end of the second pedal valve 52. Thus, by selecting the side with the higher hydraulic pressure, braking can be ensured.
The oil inlet of the automatic emergency brake valve 13 is selectively communicated with the second oil supply port ACC1 or the third oil supply port ACC2 through the third shuttle valve 17, so that the oil inlet of the automatic emergency brake valve 13 obtains oil with larger oil pressure in the second oil supply port ACC1 or the third oil supply port ACC2, the pilot end of the automatic emergency brake valve 13 obtains the oil of the oil outlet of the hydraulic control valve 12, the pressure is insufficient to overcome the spring force set by the automatic emergency brake valve 13, the valve core moves upwards, the lower position of the automatic emergency brake valve 13 is conducted at the moment, and the oil enters the outlet of the automatic emergency brake valve 13 through the oil outlet of the automatic emergency brake valve 13 and flows into the double-loop pedal valve group to brake. Therefore, the purpose of automatic emergency braking of the residual oil can be ensured.
The automatic emergency brake valve 13 is a reversing valve.
As shown in fig. 1 to 3, the system pressure is reduced to a set value, the pressure selection valve group automatically selects the low pressure signals of the first braking oil port A1 and the second braking oil port A2 to the automatic emergency braking valve 13 in real time, when the pressures of the first braking oil port A1 and the second braking oil port A2 are reduced to the set value, the automatic emergency braking valve 13 resets under the action of a spring force, and the high pressure oil paths screened by the third shuttle valve 17 in the first braking oil port A1 and the second braking oil port A2 are connected and the high pressure oil is output through the automatic emergency braking oil port A4. The high pressure oil finally acts on the port PP1 at the pilot end of the first pedal valve 51 and the port PP2 at the pilot end of the second pedal valve 52, which corresponds to the emergency and rapid pedal depression of a person, and emergency braking is adopted and maintained.
In order to prevent the oil from being insufficient to accomplish the purpose of automatic emergency braking, in some embodiments, the brake system for a construction vehicle further includes an emergency braking power unit, the leading end of the automatic emergency braking valve 13 is further in communication with the emergency braking power unit, the emergency braking power unit and the leading end of the automatic emergency braking valve 13 are directly provided with an emergency braking check valve 112, and the emergency braking check valve 112 only allows the oil to flow from the emergency braking power unit to the automatic emergency braking valve 13. This achieves the purpose of automatic emergency braking when the hydraulic pump 62 is out of control.
In some embodiments, in order to enable emergency braking of the vehicle in case of emergency, the brake valve block 1 is further provided with an electric emergency braking oil port A5, an electric emergency braking valve 14 is further arranged in the brake valve block 1, an oil inlet of the electric emergency braking valve 14 is communicated with the third oil supply port ACC2 (or the second braking oil port A2), an oil outlet of the electric emergency braking valve 14 is communicated with the electric emergency braking oil port A5, and the electric emergency braking oil port A5 is respectively communicated with a pilot end of the first pedal valve 51 and a pilot end of the second pedal valve 52.
For example, when a driver encounters an emergency situation and needs to emergently brake the vehicle, after the driver presses an emergency brake button, the valve core of the electric emergency brake valve 14 moves left and is conducted in the right position, at this time, the second energy accumulator 64 supplies oil to the electric emergency brake valve 14, the oil enters the double-loop pedal valve group through the electric emergency brake oil port A5, at this time, the pilot ends of the first pedal valve 51 and the second pedal valve 52 are conducted, the valve core moves down, the upper positions of the first pedal valve 51 and the second pedal valve 52 are conducted, and after the oil enters the first pedal valve 51 and the second pedal valve 52 through the oil inlet (the first oil supply port P1) of the brake valve block 1, the oil enters the brake through the first hand self-switching valve 31 and the second hand self-switching valve 32 respectively.
For example, when no one is driving, after an emergency occurs, the controller sends out an emergency braking signal, the valve core of the electric emergency braking valve 14 moves left and is conducted in the right position, at this time, the second energy accumulator 64 supplies oil to the electric emergency braking valve 14, the oil enters the double-loop pedal valve group through the electric emergency braking oil port A5, at this time, the pilot ends of the first pedal valve 51 and the second pedal valve 52 are conducted, the valve core moves down, the upper positions of the first pedal valve 51 and the second pedal valve 52 are conducted, and the oil enters the first pedal valve 51 and the second pedal valve 52 through the brake valve block oil inlet (the first oil supply port P1) and then enters the brake through the first hand self-switching valve 31 and the second hand self-switching valve 32 respectively.
To prevent oil in the first and second accumulators 63, 64 from returning to the hydraulic pump 62, in some embodiments, a first check valve 18 is disposed between the first and second oil supply ports P1, ACC1, and a second check valve 19 is disposed between the first and third oil supply ports P1, ACC2, the first check valve 18 allowing oil to flow only from the first oil supply port P1 to the second oil supply port ACC1, and the second check valve 19 allowing oil to flow only from the first oil supply port P1 to the third oil supply port ACC2. A third check valve 15 is disposed between the first oil supply port P1 and the fourth oil supply port ACC3, and the third check valve 15 only allows oil to flow from the first oil supply port P1 to the fourth oil supply port ACC3, and it should be noted that the fourth oil supply port ACC3 is also communicated with the second oil supply port ACC1 through the first check valve 18, and the fourth oil supply port ACC3 is also communicated with the third oil supply port ACC2 through the second check valve 19, so that the oil in the first accumulator 63 and the second accumulator 64 can be prevented from entering the third accumulator 65.
Furthermore, the foregoing description of the preferred embodiments and the principles of the invention is provided herein. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A brake system for a construction vehicle, comprising:
a brake valve block (1) having a first brake port A1 and a second brake port A2;
the electric proportional brake valve comprises a first electric proportional brake valve (21) and a second electric proportional brake valve (22), wherein the first brake oil port A1 is communicated with an oil inlet of the first electric proportional brake valve (21), and the second brake oil port A2 is communicated with an oil inlet of the second electric proportional brake valve (22);
the manual-automatic switching valve comprises a first manual-automatic switching valve (31) and a second manual-automatic switching valve (32), wherein an oil outlet of the first electric proportional braking valve (21) is communicated with a first oil inlet of the first manual-automatic switching valve (31), and an oil outlet of the second electric proportional braking valve (22) is communicated with a second oil inlet of the second manual-automatic switching valve (32);
the brake comprises a first brake (41) and a second brake (42), wherein the oil outlet of the first manual self-switching valve (31) is communicated with the rodless cavity of the first brake (41), and the oil outlet of the second manual self-switching valve (32) is communicated with the rodless cavity of the second brake (42);
the double-loop pedal valve group comprises a first pedal valve (51) and a second pedal valve (52), wherein the first pedal valve (51) and the second pedal valve (52) can synchronously act and send out a human braking signal to the electric proportional braking valve, a first braking oil port A1 is communicated with an oil inlet of the first pedal valve (51), an oil outlet of the first pedal valve (51) is communicated with a third oil inlet of the first manual switching valve (31), a second braking oil port A2 is communicated with an oil inlet of the second pedal valve (52), and an oil outlet of the first pedal valve (51) is communicated with a fourth oil inlet of the second manual switching valve (32);
and the hydraulic oil supply structure is communicated with the oil supply port of the brake valve block (1) and is used for supplying oil to the brake.
2. The brake system for a construction vehicle according to claim 1, wherein the brake valve block (1) further has a loading brake oil port A3, a loading brake solenoid valve (11) is provided in the brake valve block (1), an oil inlet of the loading brake solenoid valve (11) communicates with an oil supply port of the brake valve block (1), an oil outlet of the loading brake solenoid valve (11) communicates with the loading brake oil port A3, the loading brake oil port A3 communicates with a pilot end of the second pedal valve (52), and the second brake (42) is configured for braking a rear wheel.
3. The brake system for a construction vehicle according to claim 2, wherein the brake valve block (1) further has an automatic emergency brake port A4, a pressure selection valve group is further provided in the brake valve block (1), an oil inlet of the pressure selection valve group communicates with the first brake port A1 and the second brake port A2, an oil outlet of the pressure selection valve group communicates with the automatic emergency brake port A4, the automatic emergency brake port A4 communicates with a pilot end of a first pedal valve (51) and a pilot end of a second pedal valve (52), respectively, and the pressure selection valve group is configured to acquire oil pressures of the first brake port A1 and the second brake port A2 and close or communicate with the automatic emergency brake port A4 in accordance with the oil pressures of the first brake port A1 and the second brake port A2.
4. A brake system for a construction vehicle according to claim 3, wherein the brake valve block (1) further has an electric emergency brake oil port A5, an electric emergency brake valve (14) is further provided in the brake valve block (1), an oil inlet of the electric emergency brake valve (14) is communicated with an oil supply port of the brake valve block (1), an oil outlet of the electric emergency brake valve (14) is communicated with the electric emergency brake oil port A5, and the electric emergency brake oil port A5 is respectively communicated with a pilot end of the first pedal valve (51) and a pilot end of the second pedal valve (52).
5. The brake system for a construction vehicle according to claim 4, further comprising a first shuttle valve (7) and a second shuttle valve (8), wherein two oil inlets of the first shuttle valve (7) are respectively communicated with the automatic emergency braking oil port A4 and the electric emergency braking oil port A5, an oil outlet of the first shuttle valve (7) is respectively communicated with one of the oil inlets of the second shuttle valve (8) and a pilot end of the first pedal valve (51), the other oil inlet of the second shuttle valve (8) is communicated with the loading braking oil port A3, and an oil outlet of the second shuttle valve (8) is communicated with a pilot end of the second pedal valve (52).
6. The brake system for an engineering vehicle according to claim 5, characterized in that the hydraulic oil supply structure includes a hydraulic oil tank (61), a hydraulic pump (62), a first accumulator (63) and a second accumulator (64), an oil inlet of the hydraulic pump (62) is communicated with the hydraulic oil tank (61), an oil outlet of the hydraulic pump (62) is communicated with an oil supply port of the brake valve block (1), the oil supply port of the brake valve block (1) includes a first oil supply port P1, a second oil supply port ACC1 and a third oil supply port ACC2, the first accumulator (63) is communicated with the second oil supply port ACC1, the second accumulator (64) is communicated with the third oil supply port ACC2, the hydraulic pump (62) is communicated with the first oil supply port P1, the first oil supply port P1 is respectively communicated with the second oil supply port ACC1 and the third oil supply port ACC2, the second oil supply port 1 is also respectively communicated with the first pressure selector valve a, the second oil supply port ACC1, the oil inlet of the brake valve set (14), and the first oil supply port a, the inlet of the brake valve set (14) is respectively communicated with the first oil supply port ACC2.
7. The brake system for a construction vehicle according to claim 6, wherein the pressure selection valve group includes a pilot valve (12) and an automatic emergency brake valve (13), two oil inlets of the pilot valve (12) are respectively communicated with the first accumulator (63) and the second accumulator (64), and two pilot ends of the pilot valve (12) are respectively communicated with the first accumulator (63) and the second accumulator (64), an oil outlet of the pilot valve (12) is communicated with a pilot end of the automatic emergency brake valve (13), an oil inlet of the automatic emergency brake valve (13) is selectively communicated with the second oil supply port ACC1 or the third oil supply port ACC2 through a third shuttle valve (17), and an oil outlet of the automatic emergency brake valve (13) is communicated with the automatic emergency brake oil port A4.
8. The brake system for a construction vehicle according to claim 7, wherein a first check valve (18) is provided between the first oil supply port P1 and the second oil supply port ACC1, a second check valve (19) is provided between the first oil supply port P1 and the third oil supply port ACC2, the first check valve (18) allows only oil to flow from the first oil supply port P1 to the second oil supply port ACC1, and the second check valve (19) allows only oil to flow from the first oil supply port P1 to the third oil supply port ACC2.
9. The brake system for the engineering vehicle according to claim 1, wherein the brake further comprises a parking brake (43), a parking brake electromagnetic valve (110) is arranged in the brake valve block (1), an oil inlet of the parking brake electromagnetic valve (110) is communicated with an oil supply port of the brake valve block (1), an oil outlet of the parking brake electromagnetic valve (110) is communicated with a parking oil port of the brake valve block (1), and the parking brake electromagnetic valve (110) is used for controlling the oil supply port of the brake valve block (1) to be communicated with or disconnected from the parking brake (43).
10. A mining dump truck comprising the brake system for a construction vehicle according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311604462.XA CN117601828A (en) | 2023-11-28 | 2023-11-28 | Brake system for engineering vehicle and mining dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311604462.XA CN117601828A (en) | 2023-11-28 | 2023-11-28 | Brake system for engineering vehicle and mining dump truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117601828A true CN117601828A (en) | 2024-02-27 |
Family
ID=89952953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311604462.XA Pending CN117601828A (en) | 2023-11-28 | 2023-11-28 | Brake system for engineering vehicle and mining dump truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117601828A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118636849A (en) * | 2024-06-05 | 2024-09-13 | 北京少仕科技有限公司 | A dual-mode hydraulic brake system and control method |
| CN118876925A (en) * | 2024-09-18 | 2024-11-01 | 山推工程机械股份有限公司 | Dump truck braking system and dump truck braking method |
| WO2025232375A1 (en) * | 2024-05-06 | 2025-11-13 | 比亚迪股份有限公司 | Hydraulic braking system and vehicle |
-
2023
- 2023-11-28 CN CN202311604462.XA patent/CN117601828A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025232375A1 (en) * | 2024-05-06 | 2025-11-13 | 比亚迪股份有限公司 | Hydraulic braking system and vehicle |
| CN118636849A (en) * | 2024-06-05 | 2024-09-13 | 北京少仕科技有限公司 | A dual-mode hydraulic brake system and control method |
| CN118876925A (en) * | 2024-09-18 | 2024-11-01 | 山推工程机械股份有限公司 | Dump truck braking system and dump truck braking method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN117601828A (en) | Brake system for engineering vehicle and mining dump truck | |
| CN110352151A (en) | Braking system | |
| US20210364015A1 (en) | Fluid pressure circuit | |
| CN218343597U (en) | Hydraulic steering and lifting system and dump truck | |
| CN102717788A (en) | Braking device of heavy-duty mining dump truck | |
| CN113183816A (en) | Battery pack quick-changing and locking system of electric heavy truck | |
| CN201745568U (en) | Heavy mineral dump truck brake control system | |
| CN114132243B (en) | Dumper lifting system and method thereof | |
| CN110566521A (en) | automatic explosion-proof fork truck hydraulic system of control | |
| CN202608756U (en) | Hydraulic brake control system of mine dump truck | |
| CN116080751B (en) | Control method of hydraulic control system with energy emergency module | |
| CN117400893A (en) | Mining vehicle hydraulic braking system and application method thereof | |
| CN114954398A (en) | Hydraulic brake control system | |
| CN119319832A (en) | Hydraulic integrated valve block, hydraulic braking system and hydraulic braking method of electric forklift | |
| CN202046853U (en) | Safeguard hydraulic system for storage battery forklift | |
| CN111775913B (en) | Hydraulic emergency braking system of mining dump truck | |
| CN119550955A (en) | Unmanned mine car emergency hydraulic brake system | |
| CN116494941B (en) | Brake valve group, hydraulic brake system and engineering machinery | |
| CN220465472U (en) | Hydraulic parking braking system and working machine | |
| CN219452552U (en) | Mining dump truck lifting valve pilot control device and lifting system | |
| CN217320329U (en) | Braking system and vehicle | |
| JP2970364B2 (en) | Fluid pressure circuit in cargo handling vehicle | |
| CN214874759U (en) | Multifunctional electromagnetic reversing valve type double-motor redundant braking system | |
| CN202743227U (en) | Braking device of heavy-duty self-dumping truck for mines | |
| CN211594929U (en) | Electric fork-lift hydraulic parking braking system and electric fork-lift |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |