CN104670196A - Parking brake system for forklift and forklift with parking brake system - Google Patents
Parking brake system for forklift and forklift with parking brake system Download PDFInfo
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- CN104670196A CN104670196A CN201310628204.5A CN201310628204A CN104670196A CN 104670196 A CN104670196 A CN 104670196A CN 201310628204 A CN201310628204 A CN 201310628204A CN 104670196 A CN104670196 A CN 104670196A
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- China
- Prior art keywords
- piston
- fork truck
- parking brake
- brake system
- electromagnetic component
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Classifications
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- 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
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
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- 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
- B60T13/02—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 mechanical assistance or drive
- B60T13/04—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 mechanical assistance or drive by spring or weight
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- 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
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
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- 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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07509—Braking
Abstract
The invention discloses a parking brake system for a forklift and the forklift with the parking brake system. The parking brake system for the forklift comprises a brake cylinder, a piston, an elastic part and an electromagnetic component. The piston is movably arranged between a braking position and a braking removal position, and arranged in the brake cylinder, the interior of the brake cylinder is divided by the piston into a first oil chamber and a second oil chamber, and a magnetic part is arranged on the piston. The elastic part is arranged in the first oil chamber, and the two ends of the elastic part make contact with the wall, opposite to the piston, of the first oil chamber and the piston respectively. After the electromagnetic component is powered on, the electromagnetic component and the magnetic part conduct magnetism cooperation to generate magnetic suction so that the piston can be driven to move from the braking position to the braking removal position and to compress the elastic part in the movement process, and after the electromagnetic component is powered off, the piston is driven by the elastic part to move from the braking removal position to the braking position. According to the parking brake system for the forklift, the system is simple, braking is reliable, and energy is saved.
Description
Technical field
The present invention relates to vehicular field, in particular to a kind of parking brake system for fork truck and the fork truck with this parking brake system.
Background technology
In correlation technique, the stopping brake of fork truck mainly contains two kinds of forms.Wherein brake mode adopts a cam handle, and the mechanical force pulling pull bar to produce by the flexible axle in cam handle is to wheel braking, and complex structure and install inconvenient, easily occur accident when operating personal forgets hand-braking, safety performance is low.Another kind of brake mode is the brake mode adopting machinery and hydraulic pressure to combine, specifically, the elastic force that one end of brake cylinder adopts spring energy storage device to store is braked, the other end of brake cylinder needs outside oil pump to continue fuel feeding and needs when brake off to utilize oil pressure to overcome the energy of spring energy storage device, wherein outside oil pump continues fuel feeding and could realize brake off, waste of power is large, the requirement of discontented sufficient energy-conserving and environment-protective.
Summary of the invention
The present invention is intended to one of solve the problems of the technologies described above at least to a certain extent.For this reason, one object of the present invention is to propose that a kind of system is simple, braking is reliable and save the parking brake system for fork truck of the energy.
Another object of the present invention is to propose a kind ofly have this fork truck for the parking brake system of fork truck.
To achieve these goals, embodiment according to a first aspect of the present invention proposes a kind of parking brake system for fork truck.The described parking brake system for fork truck comprises brake cylinder; Piston, described piston is located at movably in described brake cylinder between braking position and brake off position, and described brake cylinder internal insulation is become the first oil pocket and the second oil pocket by described piston, and described piston is provided with magnetic part; Elastic component, described elastic component be located in described first oil pocket and the two ends of described elastic component respectively with the wall relative with described piston and the described piston contact of described first oil pocket; Electromagnetic component, coordinate with described magnetic part magnetic after the energising of described electromagnetic component with produce magnetic attraction drive described piston to move from described braking position to described brake off position and described in motion process elastic component described in piston compression, and described elastic component drives described piston to move from described brake off position to described braking position after described electromagnetic component power down.
According to the parking brake system for fork truck of the embodiment of the present invention, realize described fork truck brake off to drive described piston movement by attracting the described magnetic part be arranged on described piston to described electromagnetic component energising, and described elastic component is compressed with stored energy in described piston movement process, by to described electromagnetic component power down, described magnetic part is separated with described electromagnetic component, and described elastic component release stored energy drive described magnetic part to drive described piston movement to realize braking described fork truck.Therefore, according to the parking brake system for fork truck of the embodiment of the present invention, system is simple, braking is reliable and the saving energy.Specifically, described fork truck needs just to be energized to described electromagnetic component during brake off, and traditional parking brake system needs to continue could realize braking to described second oil pocket fuel feeding, thus save electric energy, and degradation of energy is little.
Further, the described parking brake system for fork truck also comprises: control cock, and described control cock comprises the first normal open mouth, the second normal open mouth and normally closed port, and described first normal open mouth is suitable for being connected with fuel tank, and described second normal open mouth is connected with described second oil pocket; And oil pump, one end of described oil pump is suitable for being connected with described fuel tank, and the other end of described oil pump is connected with described normally closed port; Wherein said first normal open mouth is communicated with described second normal open mouth with one of described normally closed port.
Parking brake system for fork truck according to the above embodiment of the present invention, only just starts described oil pump brake off under described fork truck is in special operation condition.This special operation condition odds is less, and thus the work-hours of described oil pump is few, thus both ensure that the described stability for the parking brake system of fork truck and safety again reduced energy resource consumption.
Described control cock is solenoid directional control valve or mechanical switching valve alternatively.
According to one embodiment of present invention, described control cock is solenoid directional control valve, and the first normal open mouth described in when described solenoid directional control valve power down is communicated with described second normal open mouth, and described in when described solenoid directional control valve energising, the second normal open mouth is communicated with described normally closed port.Like this, can power saving, the further operating cost of the described fork truck of reduction.
According to one embodiment of present invention, described magnetic part is fixed on the side being positioned at described first oil pocket of described piston, and described magnetic part is magnet or armature.
Advantageously, described magnetic part and described piston are same parts, and described piston is made up of magnetic material.Like this, eliminate the number of assembling steps of described magnetic part and described piston, two parts need not be designed, save design cost.
According to one embodiment of present invention, described piston is provided with registration mast, described registration mast is positioned at described first oil pocket, and described elastic component is spring, and described spring housing is on described registration mast.The installation of spring can be made thus more firm.
Alternatively, described electromagnetic component is electromagnet, thus reduces the described manufacturing cost for the parking brake system of fork truck further.
Embodiment according to a second aspect of the present invention proposes a kind of fork truck.Described fork truck comprises: accelerator pedal sensor, and described accelerator pedal sensor tramples the information of Das Gaspedal for detecting user; Parking brake system, described parking brake system is the parking brake system for fork truck according to first aspect; And controller, described controller is connected with described electromagnetic component with described accelerator pedal sensor respectively.
According to the fork truck of the embodiment of the present invention, by arranging the above-mentioned parking brake system for fork truck, and with the above-mentioned accelerator pedal sensor that coordinates for the parking brake system of fork truck and described controller, not only structure is simple, braking is reliable, save the energy and safety performance is high.
According to one embodiment of present invention, the condition that the electromagnetic component that described controller controls described parking brake system is energized is that in the schedule time before described electromagnetic component energising, described Das Gaspedal is triggered.Like this, there is slippage when can prevent described fork truck from starting on the slope, further increase the safety of described fork truck.
According to one embodiment of present invention, described fork truck also comprises movable motor sensor, described movable motor sensor is connected with described controller so that described controller controls described electromagnetic component power down according to the information that described movable motor sensor detects, thus realizes fork truck braking.
According to one embodiment of present invention, described fork truck also comprises seat sensor, described seat sensor is connected with described controller so that described controller controls described electromagnetic component power down according to the information that described seat sensor detects, thus realizes fork truck braking.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structural representation of the parking brake system for fork truck according to the embodiment of the present invention.
Reference numeral:
Fork truck 1000, parking brake system 100, brake cylinder 1, first oil pocket 101, second oil pocket 102, piston 2, magnetic part 3, elastic component 4, electromagnetic component 5, control cock 6, first normal open mouth 61, second normal open mouth 62, normally closed port 63, oil pump 7, bearing circle 8, fuel tank 9, walking brake unit 10, controller 11, wheel 12
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term "left", "right", " interior ", " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Referring to Fig. 1, the parking brake system 100 for fork truck 1000 according to the embodiment of the present invention is described.As shown in Figure 1, brake cylinder 1, piston 2, elastic component 4 and electromagnetic component 5 is comprised according to the parking brake system 100 for fork truck 1000 of the embodiment of the present invention.
Piston 2 is located at movably in brake cylinder 1 between braking position and brake off position, and brake cylinder 1 internal insulation is become the first oil pocket 101 and the second oil pocket 102 by piston 2.As shown in Figure 1, in one embodiment of the invention, the first oil pocket 101 is connected with walking brake unit 10, and when the first oil pocket 101 is by compression, the oil in the first oil pocket 101 gets back to corresponding walking braking fuel tank by the oil circuit of brake unit 10 of walking.
Piston 2 is provided with magnetic part 3.Elastic component 4 is located in the first oil pocket 101, and the two ends of elastic component 4 contact with the wall relative with piston 2 of the first oil pocket 101 and piston 2 respectively.That is, between elastic component 4 wall relative with piston 2 that be located at the first oil pocket 101 and piston 2.
After electromagnetic component 5 is energized, electromagnetic component 5 coordinates with magnetic part 3 magnetic and moves to brake off from braking position to produce magnetic attraction driven plunger 2, and in motion process piston 2 compression elastic piece 4 stored energy.After electromagnetic component 5 power down, elastic component 4 discharges the elastic energy driven plunger 2 stored and moves to braking position from brake off position.
Be understandable that, one end of piston 2 is provided with the first brake disc, the wheel 12 of fork truck 1000 can be provided with the second brake disc with the first brake disc adaptation.When piston 2 is positioned at braking position, the first brake disc engages with the second brake disc, and fork truck 1000 can not be walked, and is in dead ship condition; When piston 2 is positioned at brake off position, the first brake disc is separated with the second brake disc, and fork truck 1000 can be walked.Wherein, the oil circuit of walking brake unit 10, walking braking fuel tank and walking brake unit 10 to those skilled in the art, is known, no longer describes in detail at this.
When fork truck 1000 needs to remove stopping brake, electromagnetic component 5 is energized, and the magnetic attraction that electromagnetic component 5 produces attracts magnetic part 3 to drive piston 2 to move to the direction near electromagnetic component 5.Namely, magnetic part 3 drives piston 2 to move from braking position to brake off position under the magnetic force of electromagnetic component 5 attracts, and in motion process, the oil in the first oil pocket 101 is pushed back walking braking fuel tank, and elastic component 4 is by compression stored energy.
When piston 2 moves to brake off position, fork truck 1000 can by driving walking.Such as, in one embodiment of the invention, fork truck 1000 is electric drive fork truck 1000, and electric drive fork truck 1000 can be driven by movable motor.
When fork truck 1000 needs stopping brake, electromagnetic component 5 power down, the magnetic attraction between electromagnetic component 5 and magnetic part 3 disappears, and elastic component 4 discharges the energy drives piston 2 stored and moves to braking position from brake off position, in motion process, the oil in the second oil pocket 102 is pushed back fuel tank 9.When piston 2 moves to braking position, fork truck 1000 realizes stopping-down.
According to the parking brake system 100 for fork truck 1000 of the embodiment of the present invention, attract the magnetic part 3 arranged on the piston 2 to move with driven plunger 2 to realize fork truck 1000 brake off by being energized to electromagnetic component 5, and in piston 2 motion process compression elastic piece 4 with stored energy, by to electromagnetic component 5 power down, magnetic part 3 is separated with electromagnetic component 5, and elastic component 4 discharge stored energy drive magnetic part 3 drive piston 2 move realize fork truck 1000 is braked.Therefore, according to the parking brake system 100 for fork truck 1000 of the embodiment of the present invention, system is simple, braking is reliable and the saving energy.Specifically, fork truck 1000 needs just to be energized to electromagnetic component 5 during brake off, and traditional parking brake system needs to continue could realize braking to the second oil pocket 102 fuel feeding, thus save electric energy, and degradation of energy is little.
As shown in Figure 1, magnetic part 3 can be fixed on the side being positioned at the first oil pocket 101 of piston 2.Alternatively, magnetic part 3 can be magnet or armature, thus coordinates with electromagnetic component 5 when electromagnetic component 5 is energized and produce magnetic attraction.
Advantageously, as shown in Figure 1, magnetic part 3 and piston 2 can be same parts, and piston 2 can be made up of magnetic material.Like this, eliminate magnetic part 3 and the number of assembling steps of piston 2, two parts need not be designed, save design cost.Certainly, when magnetic part 3 and piston 2 are same parts, only can adopt magnetic material on the side being positioned at the first oil pocket 101 of piston 2, can magnetic material be saved like this, reduce manufacturing cost.Meanwhile, the number of magnetic material, can the size of braking force as required determine.In other words, when electromagnetic component 5 is energized, the magnetic attraction that magnetic part 3 and electromagnetic component 5 produce can meet the needs that fork truck 1000 brakes.
In other embodiments of the present invention, piston 2 can be provided with registration mast (not shown), registration mast can be positioned at the first oil pocket 101.Alternatively, elastic component 4 can be spring, and spring can be enclosed within registration mast.The installation of spring can be made thus more firm.
Alternatively, electromagnetic component 5 can be electromagnet, thus reduces the manufacturing cost of the parking brake system 100 being used for fork truck 1000 further.
In order to be used in the parking brake system 100 of fork truck 1000, at electricity the too low or system failure occur cannot the special operation condition of brake off time still can brake off, in one embodiment of the invention, as shown in Figure 1, the parking brake system 100 for fork truck 1000 can also comprise control cock 6 and oil pump 7.
Control cock 6 can comprise the first normal open mouth 61, second normal open mouth 62 and normally closed port 63.First normal open mouth 61 is suitable for being connected with fuel tank 9, and the second normal open mouth 62 can be connected with the second oil pocket 102.One end of oil pump 7 is suitable for being connected with fuel tank 9, and the other end of oil pump 7 can be connected with normally closed port 63.Wherein, the first normal open mouth 61 is communicated with the second normal open mouth 62 with one of normally closed port 63.Wherein, " normal open mouth " and " normally closed port " can make broad understanding, and " normal open mouth " is not be in connected state always, but when control cock 6 is in a certain mode of operation, " normal open mouth " should be in connected state always.Same, " normally closed port " is not be in closed condition always, but when control cock 6 is in a certain mode of operation, " normally closed port " should be in closed condition always.
Too low at the system voltage of the parking brake system 100 for fork truck 1000, or when breaking down for the parking brake system 100 of fork truck 1000, fork truck 1000 is in locking state.That is, now fork truck 1000 is in braking mode, cannot brake off.At this moment, oil pump 7 can be opened, and the normally closed port 63 of control cock 6 is communicated with the second normal open mouth 62 of control cock 6.The oil that oil pump 7 pumps from fuel tank 9 enters the second oil pocket 102 of brake cylinder 1 successively through the second normal open mouth 62 of the normally closed port 63 of control cock 6, control cock 6.Piston 2 in brake cylinder 1, under the effect of the oil pressure of the second oil pocket 102, moves from braking position to brake off position, until fork truck 1000 is in brake off state.Now, manpower movement fork truck 1000 can be passed through.
Be in normal working at the parking brake system 100 for fork truck 1000 (can pass through electromagnetic component 5 power down, during the energy brake off utilizing elastic component 4 to store), oil pump 7 does not work, and the first normal open mouth 61 of control cock 6 is communicated with the second normal open mouth 62 of control cock 6, when piston 2 moves to braking position from brake off position, the oil in the second oil pocket 102 can be got back in fuel tank 9.
That is, the parking brake system 100 for fork truck 1000 according to the above embodiment of the present invention, only just starts oil pump 7 brake off under fork truck 1000 is in special operation condition.Be understandable that, this special operation condition odds is less, and thus the work-hours of oil pump 7 is few, thus both ensure that and again reduce energy resource consumption for the stability of the parking brake system 100 of fork truck 1000 and safety.
Alternatively, control cock 6 can be solenoid directional control valve or mechanical switching valve.In the example of the parking brake system 100 for fork truck 1000 as shown in Figure 1, control cock 6 is the mechanical switching valve of two-bit triplet.When fork truck 1000 is in special operation condition, operating personal can be in left position by manual control mechanical switching valve, the position namely making control cock 6 be in normally closed port 63 to be communicated with the second normal open mouth 62.
In an optional embodiment of the present invention, control cock 6 can be solenoid directional control valve, and when solenoid directional control valve power down, the first normal open mouth 61 is communicated with the second normal open mouth 62, and when solenoid directional control valve is energized, the second normal open mouth 62 is communicated with normally closed port 63.That is, when fork truck 1000 is in normal working, solenoid directional control valve power down; When fork truck 1000 is in special operation condition, solenoid directional control valve is energized.Like this, can power saving, the further operating cost of reduction fork truck 1000.
In order to reduce the manufacturing cost of the parking brake system 100 being used for fork truck 1000 further, make full use of the existing parts of fork truck 1000.In one embodiment of the invention, oil pump 7 can be the measuring pump of the hydraulic steering gear of fork truck 1000.Hydraulic steering gear can comprise steering cylinder, be located at steering cylinder can be separated into two oil pockets in steering cylinder steering piston, turn to change-over valve and measuring pump.When fork truck 1000 need left-handed turning to time, the bearing circle 8 rotating fork truck 1000 makes to turn to change-over valve to be in primary importance, high pressure oil can by entering the side oil pocket of steering cylinder again after measuring pump, the steering piston promoted in steering cylinder move realize fork truck 1000 left-handed turning to.
When fork truck 1000 need right-hand turning to time, the bearing circle 8 rotating fork truck 1000 makes to turn to change-over valve to be in the second place, high pressure oil can by entering the opposite side oil pocket of steering cylinder again after measuring pump, the steering piston promoted in steering cylinder move realize fork truck 1000 right-hand turning to.
In an optional embodiment of the present invention, the normally closed port 63 of control cock 6 can be connected between the side oil pocket of measuring pump and steering cylinder by oil circuit.In another optional embodiment of the present invention, the normally closed port 63 of control cock 6 can be connected between the opposite side oil pocket of measuring pump and steering cylinder by oil circuit.Be understandable that, in the process that measuring pump can turn at fork truck 1000, measure the number of the oil mass of the side oil pocket entering steering cylinder or the opposite side oil pocket entering steering cylinder.
When fork truck 1000 is in special operation condition, can, by rotating bearing circle 8, make measuring pump work that high pressure oil is pumped into the second oil pocket 102 of brake cylinder 1 with brake off by control cock 6.
The structure of hydraulic steering gear and principle of work are known to those skilled in the art, are not described in detail at this.
Present invention also offers a kind of fork truck 1000.Fork truck 1000 can comprise accelerator pedal sensor, parking brake system 100 and controller 11.Accelerator pedal sensor tramples the information of Das Gaspedal for detecting user.Parking brake system 100 is the parking brake systems 100 for fork truck 1000 according to the above embodiment of the present invention.Controller 11 is connected with the electromagnetic component 5 of parking brake system 100 with accelerator pedal sensor respectively.
In other words, accelerator pedal sensor detects user and whether tramples Das Gaspedal.Controller 11 controls the energising of electromagnetic component 5 and power down to brake or brake off fork truck 1000 according to the Detection Information of accelerator pedal sensor (such as trample Das Gaspedal and Das Gaspedal is triggered or does not trample Das Gaspedal).
In a concrete example of the present invention, the condition that the electromagnetic component 5 that controller 11 controls parking brake system 100 is energized is that in the schedule time before electromagnetic component 5 is energized, Das Gaspedal is triggered.
That is, want brake off, first need to trigger Das Gaspedal.After namely trampling Das Gaspedal, fork truck 1000 just can brake off, realizes walking.The benefit done like this is, when can prevent fork truck 1000 from starting on the slope, slippage occurs, further increases the safety of fork truck 1000.
Therefore, according to the fork truck 1000 of the embodiment of the present invention, by arranging the above-mentioned parking brake system 100 for fork truck 1000, and with the above-mentioned accelerator pedal sensor that coordinates for the parking brake system 100 of fork truck 1000 and controller 11, not only structure is simple, braking is reliable, save the energy and safety performance is high.
In optional embodiments more of the present invention, fork truck 1000 can also comprise movable motor sensor, and movable motor sensor is connected with controller 11.Be understandable that, movable motor can drive fork truck 1000 to walk.The information (such as, the time that whether movable motor operates and movable motor shuts down) that controller 11 can detect according to movable motor sensor controls electromagnetic component 5 power down, to realize braking.
Such as, in a concrete example of the present invention, when movable motor sensor detects that movable motor has shut down 10 seconds-15 seconds, that is fork truck 1000 has remained static 10 seconds-15 seconds, controller 11 can control electromagnetic component 5 power down, realizes fork truck 1000 and brakes.Like this can economize energy further.Certainly, " 10 seconds-15 seconds " are one of them example just, and the time that movable motor shuts down can set according to actual conditions as a time conditions of electromagnetic component 5 power down.
In other optional embodiments of the present invention, fork truck 1000 can also comprise seat sensor, and seat sensor is connected with controller 11.Information that controller 11 can detect according to seat sensor (such as, whether chaufeur leaves the time that seat and chaufeur leave seat) controls electromagnetic component 5 power down, to realize braking.
Such as, in a concrete example of the present invention, when seat sensor detects that chaufeur leaves seat, and chaufeur has left seat 3 seconds-5 seconds, and controller 11 can control electromagnetic component 5 power down, realizes fork truck 1000 and brakes.So not only can economize energy further, can also driving safety be ensured, promote the safety performance of fork truck 1000 further.Certainly, " 3 seconds-5 seconds " are an example just, and the time that chaufeur leaves seat can set according to actual conditions as a time conditions of electromagnetic component 5 power down.
Be all known according to other configuration examples of the fork truck 1000 of the embodiment of the present invention for those of ordinary skills as vehicle body and wheel 12 etc. and operation, be not described in detail here.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (12)
1. for a parking brake system for fork truck, it is characterized in that, comprising:
Brake cylinder;
Piston, described piston is located at movably in described brake cylinder between braking position and brake off position, and described brake cylinder internal insulation is become the first oil pocket and the second oil pocket by described piston, and described piston is provided with magnetic part;
Elastic component, described elastic component be located in described first oil pocket and the two ends of described elastic component respectively with the wall relative with described piston and the described piston contact of described first oil pocket;
Electromagnetic component, coordinate with described magnetic part magnetic after the energising of described electromagnetic component with produce magnetic attraction drive described piston to move from described braking position to described brake off position and described in motion process elastic component described in piston compression, and described elastic component drives described piston to move from described brake off position to described braking position after described electromagnetic component power down.
2. the parking brake system for fork truck according to claim 1, is characterized in that, also comprise:
Control cock, described control cock comprises the first normal open mouth, the second normal open mouth and normally closed port, and described first normal open mouth is suitable for being connected with fuel tank, and described second normal open mouth is connected with described second oil pocket; And
Oil pump, one end of described oil pump is suitable for being connected with described fuel tank, and the other end of described oil pump is connected with described normally closed port;
Wherein said first normal open mouth is communicated with described second normal open mouth with one of described normally closed port.
3. the parking brake system for fork truck according to claim 2, is characterized in that, described control cock is solenoid directional control valve or mechanical switching valve.
4. the parking brake system for fork truck according to claim 2, it is characterized in that, described control cock is solenoid directional control valve, first normal open mouth described in when described solenoid directional control valve power down is communicated with described second normal open mouth, and described in when described solenoid directional control valve energising, the second normal open mouth is communicated with described normally closed port.
5. the parking brake system for fork truck according to claim 1, is characterized in that, described magnetic part is fixed on the side being positioned at described first oil pocket of described piston, and described magnetic part is magnet or armature.
6. the parking brake system for fork truck according to claim 1, is characterized in that, described magnetic part and described piston are same parts, and described piston is made up of magnetic material.
7. the parking brake system for fork truck according to claim 1, is characterized in that, described piston is provided with registration mast, and described registration mast is positioned at described first oil pocket, and described elastic component is spring, and described spring housing is on described registration mast.
8. the parking brake system for fork truck according to claim 1, is characterized in that, described electromagnetic component is electromagnet.
9. a fork truck, is characterized in that, comprising:
Accelerator pedal sensor, described accelerator pedal sensor tramples the information of Das Gaspedal for detecting user;
Parking brake system, described parking brake system is the parking brake system for fork truck according to any one of claim 1-8; And
Controller, described controller is connected with described electromagnetic component with described accelerator pedal sensor respectively.
10. fork truck according to claim 9, is characterized in that, the condition that the electromagnetic component that described controller controls described parking brake system is energized is that in the schedule time before described electromagnetic component energising, described Das Gaspedal is triggered.
11. fork trucks according to claim 9, it is characterized in that, also comprise movable motor sensor, described movable motor sensor is connected with described controller so that described controller controls described electromagnetic component power down according to the information that described movable motor sensor detects.
12. fork trucks according to claim 9, is characterized in that, also comprise seat sensor, and described seat sensor is connected with described controller so that described controller controls described electromagnetic component power down according to the information that described seat sensor detects.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628204.5A CN104670196B (en) | 2013-11-29 | 2013-11-29 | For fork truck parking brake system and there is its fork truck |
| PCT/CN2014/091879 WO2015078334A1 (en) | 2013-11-29 | 2014-11-21 | Parking brake system for forklift and forklift having the same |
| EP14194639.2A EP2878500B1 (en) | 2013-11-29 | 2014-11-25 | Parking brake system for forklift and forklift having the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628204.5A CN104670196B (en) | 2013-11-29 | 2013-11-29 | For fork truck parking brake system and there is its fork truck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104670196A true CN104670196A (en) | 2015-06-03 |
| CN104670196B CN104670196B (en) | 2018-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310628204.5A Active CN104670196B (en) | 2013-11-29 | 2013-11-29 | For fork truck parking brake system and there is its fork truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104670196B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738794A (en) * | 2021-08-16 | 2021-12-03 | 武汉船用机械有限责任公司 | Rotation limiting device and using method thereof |
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| EP1378415A1 (en) * | 2002-07-05 | 2004-01-07 | Bosch Rexroth AG | Spring loaded brake apparatus |
| CN1478686A (en) * | 2002-08-28 | 2004-03-03 | 朱筱杰 | Modulating type brake system |
| EP1679456A1 (en) * | 2005-01-05 | 2006-07-12 | Getrag Ford Transmissions GmbH | Safety lock especially for the parking brake of automatic transmissions |
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| Publication number | Publication date |
|---|---|
| CN104670196B (en) | 2018-03-30 |
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