CN111791950A - Integrated steering brake valve bank for mining dump truck and mining dump truck - Google Patents
Integrated steering brake valve bank for mining dump truck and mining dump truck Download PDFInfo
- Publication number
- CN111791950A CN111791950A CN202010692790.XA CN202010692790A CN111791950A CN 111791950 A CN111791950 A CN 111791950A CN 202010692790 A CN202010692790 A CN 202010692790A CN 111791950 A CN111791950 A CN 111791950A
- Authority
- CN
- China
- Prior art keywords
- node
- oil
- brake
- valve
- pilot control
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
- B60P1/16—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element actuated by fluid-operated mechanisms
- B60P1/162—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element actuated by fluid-operated mechanisms the hydraulic system itself
-
- 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
-
- 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
-
- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The utility model provides an integrated form steering brake valves and use mining dump truck of this valves for mining dump truck, the valves includes: the oil inlet module (1) comprises an oil inlet (P0), a first one-way valve (11) and a filter (12) which are connected in sequence, wherein the oil inlet (P0) is connected with a pressure output oil port of the steering brake pump, and an outlet of the filter (12) is connected with a first node (N1); the service brake pilot control module (2) comprises a rear service brake pilot control unit (21) and a front service brake pilot control unit (22); an emergency brake pilot control module (3); the parking brake control module (4) is connected with a first node (N1), a sixth oil inlet/outlet port (P6) and an oil return port (T); and the steering pilot control module (5) is connected with the first node (N1), the seventh oil outlet (P7) and the oil return port (T). The embodiment of the disclosure can improve the reliability of the steering brake valve bank and reduce the maintenance frequency and the maintenance difficulty of the valve bank.
Description
Technical Field
The disclosure relates to the technical field of hydraulic pressure, in particular to an integrated steering brake valve bank for a mining dump truck and the mining dump truck applying the same.
Background
At present, in the field of mining dump trucks, the functions of steering, braking and lifting of the mining dump truck are generally realized through a hydraulic system, and a driver realizes the functions of steering, driving braking, emergency braking and parking braking relieving of the mining dump truck by controlling a steering wheel, a hydraulic foot brake valve, an emergency brake button and a parking braking relieving button.
However, the valve bank installation and pipeline connection of each system are basically independent, the frame space of the mining dump truck is very limited, the valve bank installation of a hydraulic system is complicated, the pipeline connection is complex, when a certain path of hydraulic component has a problem and cannot work, the mining dump truck can completely lose the steering, braking or lifting capacity, and when the mine truck works under a certain working condition under a high load, if a certain function is lost and a fault needs to be checked, the valve bank is very inconvenient to disassemble and assemble, so that inestimable loss can be caused.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide an integrated steering brake valve bank for a mining dump truck, which is used for overcoming the problems of insufficient reliability, inconvenient maintenance and the like of a hydraulic valve bank due to the limitations and the defects of the related technology at least to a certain extent.
According to one aspect of the disclosure, an integrated steering brake valve set for a mining dump truck is provided, which includes: the oil inlet module (1) comprises an oil inlet (P0), a first one-way valve (11) and a filter (12) which are connected in sequence, wherein the oil inlet (P0) is connected with a pressure output oil port of the steering brake pump, and an outlet of the filter (12) is connected with a first node (N1); the service brake pilot control module (2) comprises a rear service brake pilot control unit (21) and a front service brake pilot control unit (22), the rear service brake pilot control unit (21) is connected between a first node (N1) and a second node (N2), the front service brake pilot control unit (22) is connected between the first node (N1) and a third node (N3), the second node (N2) is connected with a first oil outlet (P1) and a second oil outlet (P2), the first oil outlet (P1) is used for being connected with a brake pedal valve rear service brake main pressure input port, and the second oil outlet (P2) is used for being connected with a rear service brake accumulator oil inlet; the third node (N3) is connected with a third oil outlet (P3) and a fourth oil outlet (P4), the third oil outlet (P3) is used for being connected with a front service brake main pressure input port of a brake pedal valve, and the fourth oil outlet (P4) is used for being connected with an oil inlet of a front service brake accumulator; an emergency brake pilot control module (3) connecting said second node (N2), said third node (N3) and a fifth oil outlet (P5), said fifth oil outlet (P5) for connection to an emergency brake valve pressure input port; the parking brake control module (4) is connected with the first node (N1), a fourth node (N4) and a fifth node (N5), the fourth node (N4) is connected with a sixth oil inlet and outlet (P6), and the sixth oil inlet and outlet (P6) is connected to the parking brake oil inlet and outlet in series through a pressure reducing valve and a shuttle valve; a steering pilot control module (5) connected to the first node (N1), the fifth node (N5) and a sixth node (N6), the sixth node (N6) being connected to a seventh oil outlet (P7), the seventh oil outlet (P7) being connected to a flow amplifier main pressure input port and a steering accumulator oil inlet, respectively; wherein the fifth node (N5) is connected to the oil return (T).
In an exemplary embodiment of the present disclosure, the emergency brake pilot control module (3) includes: a shuttle valve (31), a first inlet of the shuttle valve (31) being connected to the second node (N2), a second inlet of the shuttle valve (31) being connected to the third node (N3), the shuttle valve (31) being connected to an emergency brake valve pressure input port through a fifth oil outlet (P5) for providing pilot control pressure oil to the emergency brake valve through the second node (N2) or the third node (N3).
In an exemplary embodiment of the present disclosure, the parking brake control module (4) includes: a parking brake application and release solenoid valve (41) connected to the first node (N1) through a fifth check valve (411) and a first orifice (412), to the fourth node (N4) through a third adjustable switch (413), and to the fifth node (N5) through a sixth check valve (414) and a second orifice (415); the manual pump (42) is connected with the fifth node (N5) through an oil suction port, the pressure output oil port is connected with the fourth node (N4), and the manual pump (42) is used for providing parking brake relieving power oil for the parking brake through the fifth node (N5) when a hydraulic system cannot transmit power to the fourth node (N4).
In an exemplary embodiment of the disclosure, the first node (N1) is connected to an eighth oil outlet (P8), and the eighth oil outlet (P8) is used for connecting a lifting pilot control valve and providing a pilot control pressure for the lifting pilot control valve.
In an exemplary embodiment of the present disclosure, the oil feed module (1) further includes: the inlet of the overflow valve (13) is connected with the first node (N1), the outlet of the overflow valve (13) is connected with the fifth node (N5), and the overflow valve (13) is used for unloading the hydraulic oil of the first node (N1) to the oil return port (T) when the oil pressure of the first node (N1) is higher than a preset value, so that the oil pressure of the first node (N1) is maintained within a preset numerical range.
In an exemplary embodiment of the present disclosure, the steering pilot control module (5) includes: a seventh check valve (51) connecting the first node (N1) and a sixth node (N6); and the steering unloading electromagnetic valve (52) is connected with the sixth node (N6) and the fifth node (N5) and is used for unloading the hydraulic oil in the steering accumulator after the control system of the mining dump truck is closed for a preset time.
In an exemplary embodiment of the disclosure, the filter (12) comprises a filter element (121), a pressure alarm sensor (122) and a second check valve (123) which are connected in parallel between the oil inlet check valve (11) and the first node (N1), wherein the pressure alarm sensor (122) is used for detecting the oil pressure between the oil inlet (P0) and the first node (N1) and sending an alarm signal when the oil pressure exceeds a preset alarm value of the system.
In an exemplary embodiment of the disclosure, the rear service brake pilot control unit (21) comprises a third one-way valve (211) connected between the first node (N1) and the second node (N2), and the front service brake pilot control unit (22) comprises a fourth one-way valve (221) connected between the first node (N1) and the third node (N3).
In an exemplary embodiment of the disclosure, the service brake pilot control module (2) further comprises: a first adjustable switch (212) connected between the second node (N2) and the fifth node (N5) for unloading oil pressure from the second node (N2) during service of the rear service brake pedal valve or the rear service brake accumulator; a second adjustable switch (222) connected between the third node (N3) and the fifth node (N5) for unloading the oil pressure of the third node (N3) when the preceding vehicle brake pedal valve or the preceding vehicle brake accumulator is serviced.
According to one aspect of the disclosure, a mining dump truck is provided, which comprises the integrated steering brake valve bank.
The hydraulic braking system is characterized in that an oil inlet module (1), a service braking pilot control module (2), an emergency braking pilot control module (3), a parking braking control module (4) and a valve group of a steering pilot control module (5) are integrally designed together, a filter (12) is integrated in the oil inlet module (1), the emergency braking pilot control module (3) and the parking braking control module (4) are respectively designed in a redundancy mode, oil is directly supplied to a lifting pilot control valve through a first node (N1), the occupied space of a hydraulic element and the pipeline connecting space of the hydraulic system can be saved, and the maintainability of products is improved while the safety and reliability of the hydraulic system are improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic structural diagram of an integrated steering brake valve group 100 for a mining dump truck in an exemplary embodiment of the disclosure.
Fig. 2 is a schematic structural diagram of an integrated steering brake valve assembly 200 according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a mining dump truck 300 in an exemplary embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.
Further, the drawings are merely schematic illustrations of the present disclosure, in which the same reference numerals denote the same or similar parts, and thus, a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The following detailed description of exemplary embodiments of the disclosure refers to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an integrated steering brake valve group 100 for a mining dump truck in an exemplary embodiment of the disclosure.
Referring to fig. 1, an integrated steering brake valve pack 100 for a mining dump truck may include:
the oil inlet module (1) comprises an oil inlet (P0), a first one-way valve (11) and a filter (12) which are connected in sequence, wherein the oil inlet (P0) is connected with a pressure output oil port of the steering brake pump, and an outlet of the filter (12) is connected with a first node (N1);
the service braking pilot control module (2) comprises a rear service braking pilot control unit (21) and a front service braking pilot control unit (22), the rear service braking pilot control unit (21) is connected between a first node (N1) and a second node (N2), the front service braking pilot control unit (22) is connected between a first node (N1) and a third node (N3), the second node (N2) is connected with a first oil outlet (P1) and a second oil outlet (P2), and the third node (N3) is connected with a third oil outlet (P3) and a fourth oil outlet (P4);
the emergency brake pilot control module (3) is connected with the second node (N2), the third node (N3) and the fifth oil outlet (P5);
the parking brake control module (4) is connected with a first node (N1), a fourth node (N4) and a fifth node (N5), and the fourth node (N4) is connected with a sixth oil inlet/outlet (P6);
the steering pilot control module (5) is connected with the first node (N1), the fifth node (N5) and the sixth node (N6), and the sixth node (N6) is connected with the seventh oil outlet (P7);
the fifth node (N5) is connected to the oil return (T).
Specific examples of the present disclosure when steering, service braking, emergency braking, parking braking, and release operations are performed will be described below.
Fig. 2 is a schematic structural diagram of an integrated steering brake valve assembly 200 according to an embodiment of the present disclosure.
Referring to fig. 2, the oil inlet module (1) includes an oil inlet (P0), a first check valve (11), and a filter (12) connected in sequence.
The oil inlet (P0) is connected with a pressure output oil port of the steering brake pump and provides hydraulic oil for each oil outlet connected with the integrated steering brake valve bank 100.
The filter (12) comprises a filter element (121), a pressure alarm sensor (122) and a second one-way valve (123) which are connected in parallel between the first one-way valve (11) and the first node (N1), the inlet of the filter (12) is connected with the oil inlet (P0), and the outlet of the filter (12) is connected with the first node (N1). The pressure alarm sensor (122) is used for detecting the oil pressure between the oil inlet (P0) and the first node (N1), when various impurities of the hydraulic system are accumulated in the filter element (121) to a certain degree, the pressure of the filter (12) on the side of the oil inlet (P0) is higher than the pressure on the side of the first node N1, when the pressure detected by the pressure alarm sensor (122) exceeds a preset alarm value of the system, an alarm signal is sent out, meanwhile, the second check valve (123) is conducted, at the moment, the hydraulic oil transmitted to the first node N1 through the second check valve (123) is unfiltered, the potential safety hazard exists, and the filter element is replaced in time. The filter (12) is integrated in the valve bank, so that the failure rate of the valve bank can be effectively reduced by the incoming hydraulic oil, and the installation space and the pipeline connection are saved.
In the oil inlet module (1), hydraulic oil output by a steering brake pump (not shown) flows in from an oil inlet (P0), passes through a first one-way valve (11) and a filter (12), and then is shunted to each module at a first node (N1).
In some embodiments, the oil intake module (1) further comprises a relief valve (13). The inlet of the overflow valve (13) is connected with the first node (N1), the outlet of the overflow valve (13) is connected with the fifth node (N5), and the overflow valve (13) is used for unloading the hydraulic oil of the first node (N1) to the oil return port (T) when the oil pressure of the first node (N1) is higher than a preset value so as to maintain the oil pressure of the first node (N1) within a preset value range. In some embodiments, the predetermined range of values is, for example, higher than 220 bar.
With continued reference to fig. 2, in one embodiment, the service brake pilot control module 2 includes a rear service brake pilot control unit (21) and a forward service brake pilot control unit (22) for providing rear service brake power oil and rear service brake reserve power oil to the rear service brake and forward service brake reserve power oil to the forward service brake, respectively, via a first node (N1).
The rear service brake pilot control unit (21) may include a third check valve (211) connected between the first node (N1) and the second node (N2), and the front service brake pilot control unit (22) may include a fourth check valve (221) connected between the first node (N1) and the third node (N3).
In the driving brake pilot control module (2), hydraulic oil from a first node (N1) is divided into the following two paths:
1. flows out of the first oil outlet (P1) and the second oil outlet (P2) through a third one-way valve (211), respectively flows to a rear service brake main pressure oil inlet of a brake pedal valve and a rear service brake energy accumulator oil inlet, and provides rear service brake power oil and rear service brake reserve power oil for a rear service brake when braking is implemented;
2. flows out of the third oil outlet (P3) and the fourth oil outlet (P4) through a fourth one-way valve (221) and respectively flows to a front service brake main pressure oil inlet of the brake pedal valve and a front service brake energy accumulator oil inlet, and provides front service brake power oil and front service brake reserve power oil for a front service brake when braking is implemented.
An adjustable switch can be arranged in the driving brake pilot control module (2). In one embodiment, a first adjustable switch (212) may be provided between the second node (N2) and the fifth node (N5) for unloading the oil pressure at the second node (N2) during service of the rear service brake pedal valve or the rear service brake accumulator; a second adjustable switch (222) is arranged between the third node (N3) and the fifth node (N5) and is used for unloading the oil pressure of the third node (N3) when a front service brake pedal valve or a front service brake accumulator is overhauled.
In an exemplary embodiment of the disclosure, the emergency brake pilot control module (3) may include a shuttle valve (31), a first inlet of the shuttle valve (31) being connected to the second node (N2), a second inlet being connected to the third node (N3), and being connected to the emergency brake valve pressure input port through a fifth oil outlet port (P5). The shuttle valve (31) is used to provide pilot control pressure oil to the emergency brake valve via the second node (N2) or the third node (N3).
The shuttle valve (31) can enable the emergency braking pilot control module (3) to obtain hydraulic oil from the other path when any one of the rear service braking pilot control unit (21) or the front service braking pilot control unit (22) fails, so that the normal use of the emergency braking pilot control module (3) is ensured, and the system reliability is effectively improved.
In an exemplary embodiment of the present disclosure, the parking brake control module (4) may include:
a parking brake application and release solenoid valve (41) which is connected with a first node (N1) through a fifth one-way valve (411) and a first damping hole (412), is connected with a fourth node (N4) through a third adjustable switch (413), and is connected with a fifth node (N5) through a sixth one-way valve (414) and a second damping hole (415);
and the manual pump (42), the oil suction port is connected with the fifth node (N5), and the pressure output port is connected with the fourth node (N4). When the third adjustable switch (413) is set to be in a normally open state, the parking brake is implemented and released, the electromagnetic valve (41) cannot work normally, or other faults of the hydraulic system cannot transmit power to the fourth node (N4), the third adjustable switch (413) can be set to be in a normally closed state, and parking brake releasing power oil is provided for the parking brake through the fifth node (N5).
By providing the manual pump (42) for the fourth node (N4), the reliability of the system can be improved, and the potential safety hazard that the parking brake cannot be relieved due to the implementation and relief of the electromagnetic valve fault or other faults of the system can be avoided.
The parking brake control module (4) is used to supply parking brake release power oil for the release of the parking brake via a first node (N1) and to relieve the pressure acting on the parking brake spring via a fifth node (N5) when the parking brake is applied. Specifically, in the parking brake control module (4), hydraulic oil of the first node (N1) flows to the parking brake implementation and the release solenoid valve (41) through the fifth check valve (411) and the first damping hole (412), when the parking brake is released, the hydraulic oil flows from the sixth oil inlet/outlet port (P6) to the parking brake through the parking brake implementation and the fourth node (N4) connected to the release solenoid valve (41), the parking brake release power oil is provided for releasing the parking brake, and the parking brake release power oil overcomes the spring force to separate the friction plate from the brake plate by pushing a piston in the parking brake, so that the parking brake is released. When the parking brake is applied, the oil pressure of the parking brake can be unloaded through a sixth one-way valve (414) and a second damping hole (415) by controlling the parking brake application and release electromagnetic valve (41), so that the hydraulic oil acting on a parking brake spring returns to an oil return opening (T) through a fifth node (N5), and at the moment, the spring in the parking brake pushes a piston to enable a friction plate to act on a brake pad group, so that the parking brake is realized.
When the parking brake is implemented and the electromagnetic valve (41) is relieved, or the system fault cannot relieve the parking brake and provide power oil, the manual pump (42) can relieve the power oil by manually providing the parking brake for the system through the external rocker, so that the redundant design of relieving the parking brake is realized, and the reliability of the parking brake control module is effectively improved.
The third adjustable switch (413) is arranged to disconnect the parking brake implementation and the release solenoid valve (41) from the fourth node (N4) when power oil cannot reach the fourth node N4 due to the fact that the parking brake implementation and the release solenoid valve (41) have faults or other faults of a hydraulic system cause the power oil to fail, and the manual pump (42) supplies the parking brake release power oil to the fourth node (N4) from the fifth node (N5), so that the power oil supplied by the manual pump is not unloaded. The third adjustable switch (413) may be controlled manually or electrically, and the disclosure is not limited thereto.
In an exemplary embodiment of the present disclosure, the steering pilot control module (5) may include:
the seventh check valve (51) is connected with the first node (N1) and the sixth node (N6), the sixth node (N6) is connected with the seventh oil outlet (P7), and the seventh oil outlet (P7) is respectively connected to the main pressure input port of the flow amplifier and the oil inlet of the steering accumulator;
and the steering unloading electromagnetic valve (52) is connected with the sixth node (N6) and the fifth node (N5) and is used for unloading the hydraulic oil in the steering accumulator after the control system of the mining dump truck is closed for a preset time.
The steering pilot control module (5) is used for transmitting pressure to a main pressure input port of the flow amplifier and a steering accumulator through a first node (N1), and the steering accumulator is matched with the steering device to control the flow amplifier and then transmit the pressure to the steering cylinder so as to realize a steering function. In the steering pilot control module (5), hydraulic oil from a first node (N1) flows out of a seventh oil outlet (P7) through a seventh one-way valve (51) and respectively flows to a main pressure input port of a flow amplifier and an oil inlet of a steering accumulator to provide power and storage pressure for a hydraulic steering system.
In an exemplary embodiment of the disclosure, the first node (N1) may be further connected to the lifting pilot control valve through an eighth oil outlet (P8) to provide a pilot control pressure to the lifting pilot control valve.
Further, in an exemplary embodiment of the present disclosure, the method further includes:
the oil pressure detection ports (SW2) to (SW5) are connected to the second node (N2), the third node (N3), the fourth node (N4), and the sixth node (N6), respectively, and detect the oil pressures of the first node (N1), the second node (N2), the third node (N3), the fourth node (N4), and the sixth node (N6). It will be appreciated that each node may also be provided with pressure sensor connections (e.g. G1-G5).
Fig. 3 is a schematic structural diagram of a mining dump truck in an embodiment of the disclosure.
Referring to fig. 3, the mining dump truck 300 includes the integrated steering brake valve pack 100 or 200 as described above.
According to the embodiment of the emergency brake control system, the oil inlet module (1), the service brake pilot control module (2), the emergency brake pilot control module (3), the parking brake control module (4) and the valve group control function integration design of the steering pilot control module (5) are integrated together, the filter (12) is integrated in the oil inlet module (1), redundant designs such as a shuttle valve and a manual pump are respectively carried out on the emergency brake pilot control module (3) and the parking brake control module (4), the lifting pilot control valve is directly supplied with oil, the occupied space of a hydraulic element and the pipeline connecting space of a hydraulic system can be saved, the safety and reliability of the hydraulic system are improved, and the maintainability of products is improved.
It should be noted that although in the above detailed description several modules of the device for action execution are mentioned, this division is not mandatory. Indeed, the features and functionality of two or more of the modules described above may be embodied in one module, in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module described above may be further divided into embodiments by a plurality of modules.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. The utility model provides an integrated form steering brake valves for mining dump truck which characterized in that includes:
the oil inlet module (1) comprises an oil inlet (P0), a first one-way valve (11) and a filter (12) which are connected in sequence, wherein the oil inlet (P0) is connected with a pressure output oil port of the steering brake pump, and an outlet of the filter (12) is connected with a first node (N1);
the service brake pilot control module (2) comprises a rear service brake pilot control unit (21) and a front service brake pilot control unit (22), the rear service brake pilot control unit (21) is connected between a first node (N1) and a second node (N2), the front service brake pilot control unit (22) is connected between the first node (N1) and a third node (N3), the second node (N2) is connected with a first oil outlet (P1) and a second oil outlet (P2), the first oil outlet (P1) is used for being connected with a brake pedal valve rear service brake main pressure input port, and the second oil outlet (P2) is used for being connected with a rear service brake accumulator oil inlet; the third node (N3) is connected with a third oil outlet (P3) and a fourth oil outlet (P4), the third oil outlet (P3) is used for being connected with a front service brake main pressure input port of a brake pedal valve, and the fourth oil outlet (P4) is used for being connected with an oil inlet of a front service brake accumulator;
an emergency brake pilot control module (3) connecting said second node (N2), said third node (N3) and a fifth oil outlet (P5), said fifth oil outlet (P5) for connection to an emergency brake valve pressure input port;
the parking brake control module (4) is connected with the first node (N1), a fourth node (N4) and a fifth node (N5), the fourth node (N4) is connected with a sixth oil inlet and outlet (P6), and the sixth oil inlet and outlet (P6) is connected to the parking brake oil inlet and outlet in series through a pressure reducing valve and a shuttle valve;
a steering pilot control module (5) connected to the first node (N1), the fifth node (N5) and a sixth node (N6), the sixth node (N6) being connected to a seventh oil outlet (P7), the seventh oil outlet (P7) being connected to a flow amplifier main pressure input port and a steering accumulator oil inlet, respectively;
wherein the fifth node (N5) is connected to the oil return (T).
2. Integrated steering brake group according to claim 1, characterized in that the emergency brake pilot control module (3) comprises:
a shuttle valve (31), a first inlet of the shuttle valve (31) being connected to the second node (N2), a second inlet of the shuttle valve (31) being connected to the third node (N3), the shuttle valve (31) being connected to an emergency brake valve pressure input port through a fifth oil outlet (P5) for providing pilot control pressure oil to the emergency brake valve through the second node (N2) or the third node (N3).
3. Integrated steering brake valve group according to claim 1, characterised in that the parking brake control module (4) comprises:
a parking brake application and release solenoid valve (41) connected to the first node (N1) through a fifth check valve (411) and a first orifice (412), to the fourth node (N4) through a third adjustable switch (413), and to the fifth node (N5) through a sixth check valve (414) and a second orifice (415);
the manual pump (42) is connected with the fifth node (N5) through an oil suction port, the pressure output oil port is connected with the fourth node (N4), and the manual pump (42) is used for providing parking brake relieving power oil for the parking brake through the fifth node (N5) when a hydraulic system cannot transmit power to the fourth node (N4).
4. Integrated steering brake group according to claim 1, characterized in that said first node (N1) is connected to an eighth outlet port (P8), said eighth outlet port (P8) being intended to be connected to a lifting pilot control valve, providing a pilot control pressure to the lifting pilot control valve.
5. The integrated set of steering brakes according to claim 1, characterized in that the oil intake module (1) further comprises:
the inlet of the overflow valve (13) is connected with the first node (N1), the outlet of the overflow valve (13) is connected with the fifth node (N5), and the overflow valve (13) is used for unloading the hydraulic oil of the first node (N1) to the oil return port (T) when the oil pressure of the first node (N1) is higher than a preset value, so that the oil pressure of the first node (N1) is maintained within a preset numerical range.
6. Integrated steering brake group according to claim 1, characterized in that the steering pilot control module (5) comprises:
a seventh check valve (51) connecting the first node (N1) and a sixth node (N6);
and the steering unloading electromagnetic valve (52) is connected with the sixth node (N6) and the fifth node (N5) and is used for unloading the hydraulic oil in the steering accumulator after the control system of the mining dump truck is closed for a preset time.
7. The integrated steering brake valve group according to claim 1, characterized in that said filter (12) comprises a filter element (121), a pressure alarm sensor (122) and a second check valve (123) connected in parallel between said oil inlet check valve (11) and said first node (N1), said pressure alarm sensor (122) being adapted to detect the oil pressure between said oil inlet (P0) and said first node (N1) and to emit an alarm signal when said oil pressure exceeds a preset alarm value of the system.
8. Integrated steering brake group according to claim 1, characterized in that the rear service brake pilot control unit (21) comprises a third one-way valve (211) connected between the first node (N1) and the second node (N2), the front service brake pilot control unit (22) comprising a fourth one-way valve (221) connected between the first node (N1) and the third node (N3).
9. The integrated set of steering brakes of claim 1, characterized in that the service brake pilot control module (2) further comprises:
a first adjustable switch (212) connected between the second node (N2) and the fifth node (N5) for unloading oil pressure from the second node (N2) during service of the rear service brake pedal valve or the rear service brake accumulator;
a second adjustable switch (222) connected between the third node (N3) and the fifth node (N5) for unloading the oil pressure of the third node (N3) when the preceding vehicle brake pedal valve or the preceding vehicle brake accumulator is serviced.
10. A mining dump truck characterized by comprising the integrated steering brake valve bank according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010692790.XA CN111791950B (en) | 2020-07-17 | 2020-07-17 | Integrated steering brake valve bank for mining dump truck and mining dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010692790.XA CN111791950B (en) | 2020-07-17 | 2020-07-17 | Integrated steering brake valve bank for mining dump truck and mining dump truck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111791950A true CN111791950A (en) | 2020-10-20 |
| CN111791950B CN111791950B (en) | 2022-06-21 |
Family
ID=72807671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010692790.XA Active CN111791950B (en) | 2020-07-17 | 2020-07-17 | Integrated steering brake valve bank for mining dump truck and mining dump truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111791950B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203604282U (en) * | 2013-11-04 | 2014-05-21 | 北京精海仪机电设备有限公司 | Braking, steering, lifting main control hydraulic integrated block of heavy loading truck |
| CN106184358A (en) * | 2016-08-25 | 2016-12-07 | 山东黄金矿业(莱州)有限公司三山岛金矿 | The integrated hydraulic system that a kind of Underground Mine truck operation turns to and brakes |
| US20170159679A1 (en) * | 2015-12-07 | 2017-06-08 | Kubota Corporation | Hydraulic system of work machine and work machine |
| CN207195340U (en) * | 2017-09-04 | 2018-04-06 | 紫程（宁波）电动重型卡车有限公司 | Hydraulic guide control valve group and dumper |
| US20190136877A1 (en) * | 2017-11-08 | 2019-05-09 | Applied Industrial Technologies, Inc. | Hydraulic Braking Emergency Utilization for Steering, Braking, Charging Accumulators(s), and/or Work Functions to Reduce or Prevent Engine from Overspeed, Assist Acceleration and/or Unlimited Towing |
-
2020
- 2020-07-17 CN CN202010692790.XA patent/CN111791950B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203604282U (en) * | 2013-11-04 | 2014-05-21 | 北京精海仪机电设备有限公司 | Braking, steering, lifting main control hydraulic integrated block of heavy loading truck |
| US20170159679A1 (en) * | 2015-12-07 | 2017-06-08 | Kubota Corporation | Hydraulic system of work machine and work machine |
| CN106184358A (en) * | 2016-08-25 | 2016-12-07 | 山东黄金矿业(莱州)有限公司三山岛金矿 | The integrated hydraulic system that a kind of Underground Mine truck operation turns to and brakes |
| CN207195340U (en) * | 2017-09-04 | 2018-04-06 | 紫程（宁波）电动重型卡车有限公司 | Hydraulic guide control valve group and dumper |
| US20190136877A1 (en) * | 2017-11-08 | 2019-05-09 | Applied Industrial Technologies, Inc. | Hydraulic Braking Emergency Utilization for Steering, Braking, Charging Accumulators(s), and/or Work Functions to Reduce or Prevent Engine from Overspeed, Assist Acceleration and/or Unlimited Towing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111791950B (en) | 2022-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11180127B2 (en) | Heavy duty vehicle redundant braking system | |
| CN109843669B (en) | Method for operating an electrohydraulic brake system and brake system | |
| EP1755933B1 (en) | Slip control boost braking system | |
| JP2801130B2 (en) | Brake system | |
| CN113573959B (en) | Fail safe braking system | |
| US20200406879A1 (en) | Electropneumatic equipment of a vehicle | |
| CN103318158A (en) | Integrated electronic hydraulic brake system of automobile | |
| US11377077B2 (en) | Brake-by-wire automatic brake system for vehicles | |
| JPH0667724B2 (en) | Fluid pressure breaker | |
| EA012540B1 (en) | Method for releasing at least one spring-loaded brake actuated by means of a hydraulic fluid, and also a device and a hydraulic circuit for carrying out said method | |
| CN112714726A (en) | Brake system for vehicle | |
| US3802746A (en) | Articulated tractor vehicle power steering and brake system having an emergency brake device | |
| CN114650938A (en) | Electronic pneumatic control module | |
| US11359649B2 (en) | Hydraulic system and vehicle | |
| CN211032723U (en) | Integrated steering and braking control system of large electric wheel dumper | |
| CN111791950B (en) | Integrated steering brake valve bank for mining dump truck and mining dump truck | |
| CN113060177A (en) | Locomotive brake cylinder control system and control method | |
| CN111051618B (en) | Working vehicle | |
| MXPA01007768A (en) | Relay valve with integral biased double check valve. | |
| CN109249919B (en) | Hydraulic braking control unit with empty-weight conversion function | |
| CN112088115B (en) | Redundant brake unit for a brake system and system using the same | |
| CN115339426A (en) | Brake system for a vehicle and method for operating a brake system | |
| CN211543555U (en) | Auxiliary pneumatic control system for maglev train | |
| AU2006352370B2 (en) | Brake device especially for a utility vehicle | |
| CN210113154U (en) | Hydraulic braking system of mining dump truck |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |