CN109826887A - Brake, hydraulic mechanism and intelligent mobile vehicle - Google Patents
Brake, hydraulic mechanism and intelligent mobile vehicle Download PDFInfo
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- CN109826887A CN109826887A CN201910188503.9A CN201910188503A CN109826887A CN 109826887 A CN109826887 A CN 109826887A CN 201910188503 A CN201910188503 A CN 201910188503A CN 109826887 A CN109826887 A CN 109826887A
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Abstract
The invention discloses a kind of brake and hydraulic mechanisms, the brake, for providing braking for brake disc, the brake includes keeping seat, it is fixed on the hydraulic cylinder kept on seat and is driven in the friction block of the hydraulic cylinder, it is formed by driving chamber in the hydraulic cylinder and is connected to by brake piping with pump, a variable chamber is limited in or on the hydraulic cylinder, and make the variable chamber in response to the pressure of the indoor hydraulic oil of the driving chamber, when the indoor hydraulic oil of the driving chamber generates pressure pulse, the variable chamber is by shrinking to absorb the pressure pulse.The present invention in or on the hydraulic cylinder of brake by limiting a variable chamber, and then the pressure pulse that pump can be made to generate is absorbed in brake.
Description
Technical field
The present invention relates to the braking technology field of move vehicle, in particular to a kind of brake, hydraulic mechanism and intelligence
Move vehicle.
Background technique
Move vehicle, especially light high-speed move vehicle, such as family-sized car, generally use brake fluid system (or
Hydraulic mechanism or system) it is that vehicle carries out braking or parking.A kind of provided brake fluid system includes: system in the prior art
Dynamic pedal, master cylinder, pump, brake, brake piping, oil return line, two valves and the electronic control for control valve fill
It sets.Wherein, it is known that ground, master cylinder and brake pedal link to obtain the braking distance with reliable force feedback, brake
Be installed on wheel hub with by Driven by Hydraulic Cylinder friction block thereon with apply pressure to the brake disc on wheel hub and implement to brake, and can
Know ground, the pressure for supplying the hydraulic oil of hydraulic cylinder is higher, and friction block is bigger to the brake force of brake disc；Hydraulic cylinder on brake
Hydraulic oil pressure by pumping by above-mentioned brake piping offer, pump makes according to the increase of brake-pedal travel by system
The pressure that dynamic pipeline enters the hydraulic oil in the hydraulic cylinder on brake increases, and then increases the braking to the brake disc of wheel hub
Power.Oil return line is used in brake pedal rebound (brake pedal rebound is for releasing the braking to wheel hub), makes brake
Hydraulic oil pressure release (for example, being back in hydraulic oil container) in hydraulic cylinder.One of valve in two valves is mounted on brake pipe
On the road, another valve is mounted on oil return line, and electronic control unit is used to control the opening and closing of two valves, controls opportunity are as follows:
When driver tramples brake pedal and needs to implement braking, the valve that electronic control unit control is mounted on brake piping is beaten
It opens, and closes the valve being mounted on oil return line, so that the pressure of the hydraulic oil in the hydraulic cylinder on brake increases, in turn
Implement braking；When driver loosen the brake and brake pedal rebound and when braking to be released, electronic control unit control peace
Valve on oil return line is closed, and then carries out pressure release to the hydraulic oil in hydraulic cylinder.
Above-mentioned braking system in the prior art has following defects that
With the increase of the stroke of brake pedal, provided pressure increases with it pump, brake pedal one of beginning compared with
Under small stroke, the hydraulic cylinder of brake contacts friction block with brake disc formation, and brake pedal is in subsequent very long row
Under journey, the pressure constantly increased for pumping be supplied to brake piping is used to that friction block to be made constantly to increase the pressure of brake disc, into
And increase brake force constantly.
However, pumping during increasing the pressure in brake piping constantly, because self-operating characteristic is inevitable
So that hydraulic oil is generated pressure pulse, later period that this pressure pulse increases in pressure (at this point, brake force will close to maximum, but
Ramp-up period is in brake force) fluctuation that is showed is particularly evident, and this makes:
1, brake piping and the component being attached thereto can generate shake and noise.
2, contact that (piston rod in hydraulic cylinder is directly connected to brake disc " hard " by friction block because of the hydraulic cylinder of brake
In friction block), friction block can generate greater impact in response to above-mentioned pressure pulse and to brake, and this impact is adversely.
Summary of the invention
For the above-mentioned technical problems in the prior art, the embodiment provides a kind of brakes, hydraulic
Mechanism and intelligent mobile vehicle.
In order to solve the above technical problems, the embodiment of the present invention the technical solution adopted is that:
A kind of brake, for providing braking for brake disc, the brake includes keeping seat, being fixed on the holding seat
On hydraulic cylinder and be driven in be formed by the friction block of the hydraulic cylinder, the hydraulic cylinder driving chamber by brake pipe
Road is connected to pump, a variable chamber is limited in or on the hydraulic cylinder, and make the variable chamber in response to the drive
The pressure of the dynamic indoor hydraulic oil of chamber, with when the indoor hydraulic oil of the driving chamber generates pressure pulse, the variable chamber
By shrinking to absorb the pressure pulse.
Preferably, make when the actual pressure of hydraulic oil in the driving chamber room is greater than preset pressure, the variable chamber
Absorb the generated pressure pulse on the basis of actual pressure.
Preferably, the variable chamber is limited in the hydraulic cylinder.
Preferably, the hydraulic cylinder includes:
Cylinder body has a first end and a second end；
First piston is set in the cylinder body, and limits the driving chamber, institute with the first end of the cylinder body
The first end for stating cylinder body is formed with the first hydraulic fluid port penetrated through with the driving chamber；
Second piston is set in the cylinder body, and limits the variable chamber with the first piston；
Piston rod is set in the second piston, and stretches out the second end of the cylinder body, and the friction block is installed in
The end of the piston rod；
First spring is set between the second piston and the second end of the cylinder body；
Pressure ratio is to mechanism；Wherein:
The pressure ratio to mechanism be used for when the actual pressure of hydraulic oil in the driving chamber room be greater than preset pressure when and
Keep first piston close to the second piston and realizes the contraction of the variable chamber, and described in being less than when the actual pressure
It keeps constant the distance between the first piston and the second piston when preset pressure and keeps the variable chamber
It is constant.
Preferably, the pressure comparison mechanism includes:
Second spring is set between the first piston and the second piston；
Guide rod is fixed on the first piston, and the end of the guide rod is formed with retaining head；
Guide sleeve is fixed in the second piston, and the guide rod stretches in the guide sleeve；
When the actual pressure is greater than preset pressure, the actual pressure overcomes the second spring and makes described first
Piston is mobile towards the second piston；And when the actual pressure is less than preset pressure, the first piston is by described
The retaining head backstop of guide rod is in keeping constant distance with the second piston in the guide sleeve.
Preferably, the second hydraulic fluid port with variable chamber perforation is formed on the cylinder body；Wherein:
The flow-guiding channel for being connected to the driving chamber with the variable chamber is offered on the first piston；
Throttle mechanism is also installed on the first piston, the throttle mechanism includes:
Throttle body, changes the passage section of the flow-guiding channel by flexible；
Third spring provides elastic force for the throttling body.
The present invention has also supplied a kind of hydraulic mechanism, comprising: brake pedal, master cylinder, pump, brake piping, oil return line,
First valve member, the second valve member and electronic control unit, first valve member are set on the brake piping, second valve
Part is set on the oil return line；The electronic control unit is disposed for controlling first valve member and second valve
The opening and closing of part, the hydraulic mechanism further include above-mentioned brake；Wherein:
The brake piping is connected between the driving chamber of the hydraulic cylinder of the pump and the brake.
The present invention has also supplied a kind of hydraulic mechanism, comprising: brake pedal, master cylinder, pump, brake piping, oil return line,
First valve member, the second valve member and electronic control unit, first valve member are set on the brake piping, second valve
Part is set on the oil return line；The electronic control unit is disposed for controlling first valve member and second valve
The opening and closing of part, the hydraulic mechanism further include electric control one-way valve and above-mentioned brake；Wherein:
The brake piping is connected between the driving chamber of the hydraulic cylinder of the pump and the brake；
Second hydraulic fluid port connects an oil return branch, and the electric control one-way valve is set to the oil return branch road；
The electronic control unit is configured to: when the indoor actual pressure of the driving chamber of the hydraulic cylinder in the brake
When greater than default opening pressure, controls the electric control one-way valve and open；
The default opening pressure is less than the preset pressure.
Preferably, the oil return line be connected between the hydraulic cylinder of the brake and the pump with the brake pipe
Road forms closed circuit；
The oil return branch is connected on the oil return line between the pump and second valve member.
The invention also discloses a kind of intelligent mobile vehicles, including above-mentioned hydraulic mechanism.
Compared with prior art, the beneficial effect of brake and hydraulic mechanism disclosed by the invention is: the present invention by
The pressure pulse for limiting a variable chamber in or on the hydraulic cylinder of brake, and then pump capable of being made to generate obtains in brake
To absorb.
It should be appreciated that foregoing general description and it is described in detail below be merely exemplary with it is illustrative, rather than use
In the limitation present invention.
The various realizations or exemplary general introduction of technology described in the present invention, be not disclosed technology full scope or
The comprehensive disclosure of all features.
Detailed description of the invention
In the attached drawing being not drawn necessarily to scale, identical appended drawing reference can describe similar in different views
Component.Same reference numerals with letter suffix or different letter suffix can indicate the different instances of similar component.Attached drawing
Generally through citing rather than the mode of limitation shows various embodiments, and reinstates with specification and claims one
It is illustrated in the embodiment invented.In due course, make to be referred to identical reference in all the appended drawings same
One or similar part.Such embodiment is illustrative, and is not intended as the exhaustive or exclusive of the present apparatus or method
Embodiment.
Fig. 1 is the schematic diagram of hydraulic mechanism provided by the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of brake provided by the embodiment of the present invention.
Fig. 3 is the enlarged view of the local A of Fig. 2.
Fig. 4 is the Status view that brake provided by the embodiment of the present invention is in braking starting and intermediate stage.
Fig. 5 is the enlarged view of the local B of Fig. 4.
Fig. 6 is the enlarged view of the local E of Fig. 5.
Fig. 7 is the Status view that brake provided by the embodiment of the present invention is in the braking later period.
Fig. 8 is the enlarged view of the Local C of Fig. 7.
Fig. 9 is the enlarged view of the local F of Fig. 8.
Figure 10 is the enlarged view of the local G of Fig. 8.
Figure 11 is the Status view that brake provided by the embodiment of the present invention is in braking latter stage.
Figure 12 is the enlarged view of the local D of Figure 11.
Figure 13 is the enlarged view of the local H of Figure 12.
Appended drawing reference:
100- brake；101- keeps seat；102- friction block；200- brake disc；10- hydraulic cylinder；20- brake pedal；30-
Master cylinder；40- pump；50- electronic control unit；The first valve member of 61-；The second valve member of 62-；63- electric control one-way valve；64- pressure
Sensor；71- brake piping；72- oil return line；73- oil return branch；80- low pressure accumulator；11- cylinder body；111- driving chamber
Room；112- variable chamber；The first hydraulic fluid port of 113-；The second hydraulic fluid port of 114-；12- first piston；121- flow-guiding channel；13- second is living
Plug；The first spring of 14-；15- pressure comparison mechanism；151- guide sleeve；152- guide rod；153- second spring；154- retaining head；
155- adjusting sleeve；16- piston rod；17- throttle mechanism；171- throttling body；172- third spring；173- top cover；181- snap ring；
182- locking plate.
Specific embodiment
In order to enable the purposes, technical schemes and advantages of the embodiment of the present invention are clearer, below in conjunction with of the invention real
The technical solution of the embodiment of the present invention is clearly and completely described in the attached drawing for applying example.Obviously, described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on described the embodiment of the present invention, this field is common
Technical staff's every other embodiment obtained under the premise of being not necessarily to creative work belongs to the model that the present invention protects
It encloses.
Unless otherwise defined, the technical term or scientific term that the present invention uses should be tool in fields of the present invention
The ordinary meaning for thering is the personage of general technical ability to be understood." first ", " second " used in the present invention and similar word are simultaneously
Any sequence, quantity or importance are not indicated, and are used only to distinguish different component parts." comprising " or "comprising" etc.
Similar word means that the element or object before the word occur covers the element or object for appearing in the word presented hereinafter
And its it is equivalent, and it is not excluded for other elements or object.The similar word such as " connection " or " connected " is not limited to physics
Or mechanical connection, but may include electrical connection, it is either direct or indirectly."upper", "lower",
"left", "right" etc. is only used for indicating relative positional relationship, and after the absolute position for being described object changes, then the relative position is closed
System may also correspondingly change.
In order to keep the following explanation of the embodiment of the present invention to understand and simplicity, present invention omits known functions and known portion
The detailed description of part.
As shown in Figure 1 to Figure 3, the invention discloses one kind for being high-speed mobile vehicle, and e.g., family-sized car provides system
Dynamic hydraulic mechanism and the brake 100 for belonging to the hydraulic mechanism, the brake 100 is by hydraulic provided by hydraulic mechanism
The pressure of oil implements braking to the brake disc 200 of wheel hub.The hydraulic mechanism is in addition to including brake 100, further includes: brake pedal
20, master cylinder 30, pump 40, brake piping 71, oil return line 72, the first valve member 61, the second valve member 62 and electronic control dress
Set 50.For hydraulic mechanism, it is generally known that: brake pedal 20 is connected to master cylinder 30, and brake piping 71 is connected to pump 40
Between brake 100；Oil return line 72 is also connected to brake 100；First valve member 61 is arranged on brake piping 71, and second
Valve member 62 is arranged on oil return line 72.For brake 100, it is generally known that: it includes keeping seat 101 and by snap ring
181 and locking plate 182 be fixed on keep seat 101 on hydraulic cylinder 10 and be driven the friction block 102 in hydraulic cylinder 10, hydraulic cylinder 10
It is inside formed by driving chamber 111 and is connected to by above-mentioned brake piping 71 with pump 40.The course of work of hydraulic mechanism are as follows: when right
When move vehicle implements braking, driver tramples brake pedal 20, and electronic control unit 50 opens the first valve member 61, and makes the
Two valve members 62 are closed, and pump 40 brings into operation, with the increase of 20 stroke of brake pedal, the pressure of hydraulic oil provided by pump 40
Corresponding increase, correspondingly, the increasing full of hydraulic oil and Simultaneous Pressure in the driving chamber 111 of brake piping 71 and hydraulic cylinder 10
Add and (because oil return line 72 is closed by the first valve member 61 hydraulic oil will not be flowed out from oil return line 72, so that hydraulic
Cylinder 10 driving chamber 111 and brake piping 71 pressure increase without pressure release), and then drive friction block 102 quickly with system
Moving plate 200 contacts and increases the pressure to brake disc 200, and then implements to brake to brake disc 200.Because pumping the characteristic of 40 operations,
While pump 40 makes pressure increase, the driving chamber 111 of brake piping 71 and hydraulic cylinder 10 can be made to generate pressure pulse.At this
In invention, the brake 100 by providing the brake 100 in being different from the prior art makes at least part pressure pulse
It is absorbed.Brake 100 provided by the present invention, one is limited in or on its hydraulic cylinder 10 may be in response to driving chamber
The variable chamber 112 of the pressure of hydraulic oil in 111.In this way, passing to drive by brake piping 71 caused by 40 operation of pump
The pressure pulse of dynamic chamber 111 can be absorbed by the contraction of variable chamber 112, and then can reduce because pressure pulse is led
The shake of component on the brake piping 71 of cause and noise, and can reduce simultaneously in rubbing with 200 contact condition of brake disc
Impact of the cleaning block 102 to brake disc 200.
The present invention can be made by limiting a variable chamber 112 in or on the hydraulic cylinder 10 of brake 100
The pressure pulse that pump 40 generates is absorbed in brake 100.
Initial phase and intermediate stage in braking process, the caused pressure pulse of 40 operation of pump is to noise, shake
And friction block 102 is to the contribution of the impact of brake disc 200 and little, that is to say, that when the pressure of hydraulic oil is not high, at this
The pressure pulse that is formed on the basis of pressure is simultaneously unlikely to cause excessively bad result.And the later period in braking process, it is hydraulic
The pressure of oil is very big, and generated pressure pulse can generate very bad result and (e.g., generate biggish tremble on the basis of the pressure
Dynamic, noise and impact), in that regard, variable chamber 112 can be set to be not responsive on the basis of lower pressure
Pressure pulse.For this purpose, in a preferred embodiment of the invention, keeping the actual pressure when hydraulic oil in driving chamber 111 big
When preset pressure, variable chamber 112 absorbs generated pressure pulse on the basis of actual pressure.And the preset pressure can
It is set as a value or range in the larger pressure limit of later period formation, for example, the preset pressure may be configured as: 0.7PIt is maximum(P
Being hydraulic oil is formed by maximum pressure for braking).In this way, the later period in braking process, variable chamber 112 by shrink with
The pressure pulse on the pressure-based is absorbed, and then can be effectively compared with low jitter, noise and impact.
The advantage of above-described embodiment is:
By the way that the pressure node (preset pressure is pressure node) of absorption pressure pulse is arranged, so that brake 100 is not only
The pressure pulse that can lead to worse result can be absorbed, and is avoided or reduced on the basis of lower pressure simultaneously because of absorption pressure arteries and veins
The pressure that the movement of friction block 102 caused by punching or pressure increase lag behind in the driving chamber 111 of hydraulic cylinder 10 increases.
Above-mentioned variable chamber 112 may be formed on cylinder body 11 or outside, for example, be arranged radially by setting one
Sleeve shape body and the piston slided in sleeve shape body limit above-mentioned variable chamber 112.
As shown in Figures 2 and 3, An embodiment provides a kind of variable chambers 112 to be limited in cylinder body 11
Hydraulic cylinder 10 brake 100.Specifically, the hydraulic cylinder 10 of brake 100 includes: cylinder body 11, the work of first piston 12, second
Plug 13, piston rod 16, the first spring 14 and pressure ratio are to mechanism.Specifically, cylinder body 11 has the first end in axial direction and the
Two ends；First piston 12 is set in cylinder body 11, and limits above-mentioned driving chamber 111, cylinder body with the first end of cylinder body 11
11 first end is formed with the first hydraulic fluid port 113 penetrated through with driving chamber 111；Second piston 13 is set in cylinder body 11, and with
First piston 12 limits above-mentioned variable chamber 112；Piston rod 16 is set in second piston 13, and stretches out the of cylinder body 11
Two ends, friction block 102 are installed in the end of piston rod 16；First spring 14 is set to the second end of second piston 13 Yu cylinder body 11
Between；Pressure ratio is used to mechanism make first to live when driving the actual pressure of hydraulic oil in chamber 111 to be greater than preset pressure
12 contractions that are close and realizing variable chamber 112 to second piston 13 are filled in, and make first when actual pressure is less than preset pressure
The distance between piston 12 and second piston 13 keep constant and keep constant variable chamber 112.Wherein, for the brake
The brake piping 71 and oil return line 72 of 100 hydraulic mechanism are connected to by the first hydraulic fluid port 113 with driving chamber 111.
The course of work of the hydraulic mechanism with brake 100 disclosed in above-described embodiment is described below:
When needing to implement to brake to vehicle, driver tramples brake pedal 20, and pump 40 is run simultaneously, electronic control unit
50 the first valve members 61 of control and the second valve member 62 open the first valve member 61, close the second valve member 62, and pump 40 makes brake pipe
The hydraulic oil of the driving chamber 111 of road 71 and hydraulic cylinder 10 increases, and drives first piston 12 and second piston 13 mobile, such as schemes
Shown in 4 to 6, correspond to 20 stroke of brake pedal braking process in initial phase, drive chamber 111 in continuous increase
Pressure be less than preset pressure and first piston 12 and second piston 13 kept at a distance constant synchronizing moving, and by work
Stopper rod 16 and friction block 102 is contacted with brake disc 200；Centre in the braking process for corresponding to 20 stroke of brake pedal
In the stage, the pressure constantly increased, which is still less than preset pressure, will not make first piston 12 towards the movement of second piston 13, but borrow
Pressure is passed into friction block 102 by first piston 12, second piston 13 and piston rod 16, to increase 102 pairs of friction block systems
The pressure of Moving plate 200, and then increase brake force.
As shown in Figure 7 to 10, the later period in the braking process for corresponding to 20 stroke of brake pedal, the pressure constantly increased
More than after preset pressure, the pressure pulse on the pressure-based can make first piston 12 mobile towards second piston 13 and make power
Variable chamber 112 is shunk, and in the process, the contraction of variable chamber 112 is so that pressure pulse is absorbed, and then is effectively avoided
Or reduce the noise caused by the pressure pulse in the pressure stage, shake and impact.
When needing to release braking, brake pedal 20 is sprung back, meanwhile, electronic control unit 50 controls the second valve member 62 and beats
It opens, and then opens oil return line 72, pump 40 is out of service, under the action of the first spring 14, first piston 12, second piston
13 drive piston rod 16 and the reverse movement of friction block 102 so that friction block 102 is separated with brake disc 200, in driving chamber 111
Hydraulic oil flows to oil return line 72.
The advantage of above-described embodiment is:
By making two pistons limit variable chamber 112 and by pressure ratio being arranged between two pistons to mechanism,
So that hydraulic cylinder 10 carries out rigid driving and rigidity to friction block 102 in mesolow power stage (starting of braking and intermediate stage)
It exerts a force, and the relatively flexible force application of pressure pulse can be considered to the implementation of friction block 102 in the high pressure stage (later period of braking), no
But avoid or reduce braking originally and the intermediate stage, the generation of the issuable lag situation of friction block 102, Er Qieneng
It is enough effectively reduced in the braking later period because of the impact of shake, noise and friction block 102 to brake disc 200 caused by pressure pulse.
In a preferred embodiment of the invention, it such as Fig. 1 and Fig. 2, and combines shown in Fig. 6 and Fig. 9, pressure comparison mechanism
15 include: second spring 153, guide rod 152 and guide sleeve 151.Second spring 153 is set to first piston 12 and second and lives
Between plug 13；Guide rod 152 is fixed on first piston 12, and the end of guide rod 152 is formed with retaining head 154；Guide sleeve 151
It is fixed in second piston 13, guide rod 152 stretches in guide sleeve 151.In this way, as shown in figure 8, when actual pressure is greater than in advance
If when pressure, actual pressure overcomes second spring 153 and keeps first piston 12 mobile towards second piston 13；As shown in figure 5, and
When actual pressure is less than preset pressure, first piston 12 is by 154 backstop of retaining head of guide rod 152 in guide sleeve 151
And distance is kept constant with second piston 13.
Should illustrate: the coefficient of elasticity of second spring 153 should be greater than the coefficient of elasticity of the first spring 14, and second spring
153 when making 154 backstop of retaining head in guide sleeve 151, and second spring 153 is substantially equal to default pressure to the pressure of two pistons
Power, so that starting and intermediate stage in braking, the first spring 14 is shunk, and second spring 153 keeps compressive state constant,
And then the later period for remaining unchanged the variable chamber 112 between first piston 12 and second piston 13, and braking, it is corresponded to meeting with
When pressure pulse on pressure-based, second spring 153, which passes through, shrinks absorption pressure pulse.
Preferably, the adjusting sleeve 155 of the stop dog position of an adjustable retaining head 154 is set on the head of guide sleeve 151,
The adjusting sleeve 155 adjusts second spring 153 by adjusting retaining head 154 to the elastic force of two pistons, and then adjusts default pressure
Power, and then change the pressure opportunity of absorption pressure pulse.
In a preferred embodiment of the invention, the second hydraulic fluid port penetrated through with variable chamber 112 is formed on cylinder body 11
114；Wherein: the flow-guiding channel 121 for making that chamber 111 is driven to be connected to variable chamber 112 is offered on first piston 12；First is living
Throttle mechanism 17 is also installed on plug 12 and for real-time measurement brake piping 71 (in indirect acquisition driving chamber 111
Pressure), throttle mechanism 17 includes: throttling body 171, changes the passage section of flow-guiding channel 121 by flexible；Third spring
171, elastic force is provided for throttling body 171, top cover 173 is for blocking third spring 171.Meanwhile hydraulic mechanism adds an electricity
Control check valve 63 and oil return branch 73.In the present embodiment, oil return branch 73 is connect with the second hydraulic fluid port 114；Electric control one-way valve 63
It is set on oil return branch 73；Electronic control unit 50 is configured to: being electrically connected to pressure sensor 64 to pass through pressure sensing
Device 64 obtains brake piping 71 and drives the pressure in chamber 111；When the driving chamber 111 of the hydraulic cylinder 10 in brake 100
When interior actual pressure is greater than default opening pressure, control electric control one-way valve 63 is opened；Default pressure of opening is less than preset pressure.
When the intermediate stage of braking is to post transition, driving the pressure of the hydraulic oil in chamber 111 can be more than default beat
Pressure is opened, at this point, as shown in Figure 10, electric control one-way valve 63 is electronically controlled device 50, drives the meeting of the hydraulic oil in chamber 111
Variable chamber 112 is flowed by flow-guiding channel 121 and under the restriction of throttling body 171, and flows to oil return via oil return branch 73
Pipeline 72, it is possible to understand that ground, when upon transition to the later period, hydraulic oil flows into variable chamber 112 yet by the flow-guiding channel 121,
And the passage section for being throttled the restriction of body 171 will increase.At this stage, throttle mechanism 17 is with flow-guiding channel 121 by allowing to drive
Hydraulic oil in dynamic chamber 111 is flowed out in a manner of limited flow rate and carries out certain filtering to pressure pulse, and this filtering
Will not influence when actual pressure is greater than preset pressure, variable chamber 112 and pressure comparison mechanism 15 carry out to pressure arteries and veins
The absorption of punching, so that in actual pressure during close to preset pressure, it also can be to pressure arteries and veins by flow-guiding channel 121
Punching carries out certain absorption by the flowing of hydraulic oil.
As shown in figure 13, in the latter stage close to braking, throttling body 171 bounces back to the greatest extent, so that passage section is maximum,
More hydraulic oil are flowed out by flow-guiding channel 121, so that the speedup of actual pressure slows down or even increases actual pressure no longer
The increase for adding, and then friction block 102 capable of being effectively prevent excessive to the pressure of brake 100, to avoid when friction block 102 and
Because pressure is excessive irreversible deformation occurs for brake disc 200.Therefore, at this stage, flow-guiding channel 121 and throttle mechanism 17
For overload protection.
In a preferred embodiment of the invention, hydraulic mechanism also adds low pressure accumulator 80, and makes oil return line 72
It is connected between the hydraulic cylinder 10 of brake 100 and pump 40 to form closed circuit with brake piping 71；Oil return branch 73 connects
To the oil return line 72 between pump 40 and the second valve member 62.In the present embodiment, when implementing braking, from variable chamber 112
The hydraulic oil of interior outflow carries the energy formed because absorbing pressure pulse by way of pressure increase to have, this is taken
Hydraulic oil with energy is able to enter low pressure accumulator 80 by oil return branch 73, oil return line 72 and deposits energy
Storage, and the energy that the low pressure accumulator 80 is stored is supplied to pump 40 in real time, and then can will pass through absorption pressure pulse institute
The energy of carrying is re-used.
The invention also discloses a kind of intelligent mobile vehicles, including above-mentioned hydraulic mechanism.
In addition, range includes any and all based on this although describing exemplary embodiment in the present invention
Invention has equivalent element, modification, omission, combination (for example, scheme that various embodiments are intersected), reorganization or the implementation changed
Example.Element in claims will be construed broadly as based on the language used in claim, however it is not limited in this explanation
Described example, example are to be interpreted as nonexcludability in book or during the implementation of the application.Therefore, this specification and
Example is intended to be to be considered only as example, and real scope and spirit are by following following claims and the full scope of its equivalent institute
Instruction.
Above description is intended to illustrative rather than restrictive.For example, above-mentioned example (or one or more side
Case) it can be in combination with one another.Such as other embodiments can be used when reading foregoing description in those of ordinary skill in the art.
In addition, various features can be grouped together to simplify the present invention in above-mentioned specific embodiment.This should not be construed as
A kind of not claimed disclosed feature is necessary intention for any claim.On the contrary, subject of the present invention can be with
Less than whole features of specific disclosed embodiment.To which following claims is incorporated to herein as example or embodiment
In specific embodiment, wherein each claim is independently as individual embodiment, and consider that these embodiments can be with
It is combined with each other with various combinations or arrangement.The scope of the present invention should refer to appended claims and these claims are entitled
The full scope of equivalent form determines.
Above embodiments are only exemplary embodiment of the present invention, are not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (10)
1. a kind of brake, for providing braking for brake disc, the brake includes keeping seat, being fixed on the holding seat
Hydraulic cylinder and be driven in be formed by the friction block of the hydraulic cylinder, the hydraulic cylinder driving chamber by brake piping
It is connected to pump, which is characterized in that limit a variable chamber in or on the hydraulic cylinder, and respond the variable chamber
It is described with when the indoor hydraulic oil of the driving chamber generates pressure pulse in the pressure of the indoor hydraulic oil of the driving chamber
Variable chamber is by shrinking to absorb the pressure pulse.
2. brake according to claim 1, which is characterized in that make the actual pressure when hydraulic oil in the driving chamber room
When greater than preset pressure, the variable chamber absorbs the generated pressure pulse on the basis of actual pressure.
3. brake according to claim 2, which is characterized in that the variable chamber is limited in the hydraulic cylinder.
4. brake according to claim 3, which is characterized in that the hydraulic cylinder includes:
Cylinder body has a first end and a second end；
First piston is set in the cylinder body, and limits the driving chamber, the cylinder with the first end of the cylinder body
The first end of body is formed with the first hydraulic fluid port with the driving chamber perforation；
Second piston is set in the cylinder body, and limits the variable chamber with the first piston；
Piston rod is set in the second piston, and stretches out the second end of the cylinder body, and the friction block is installed in described
The end of piston rod；
First spring is set between the second piston and the second end of the cylinder body；
Pressure ratio is to mechanism；Wherein:
The pressure ratio is used to mechanism make the when the actual pressure of hydraulic oil in the driving chamber room is greater than preset pressure
One piston is close to the second piston and realizes the contraction of the variable chamber, and when the actual pressure is less than described preset
It keeps constant the distance between the first piston and the second piston when pressure and keeps constant the variable chamber.
5. brake according to claim 4, which is characterized in that the pressure comparison mechanism includes:
Second spring is set between the first piston and the second piston；
Guide rod is fixed on the first piston, and the end of the guide rod is formed with retaining head；
Guide sleeve is fixed in the second piston, and the guide rod stretches in the guide sleeve；
When the actual pressure is greater than preset pressure, the actual pressure overcomes the second spring and makes the first piston
It is mobile towards the second piston；And when the actual pressure is less than preset pressure, the first piston is by the guiding
The retaining head backstop of bar is in keeping constant distance with the second piston in the guide sleeve.
6. brake according to claim 4, which is characterized in that be formed on the cylinder body and penetrated through with the variable chamber
The second hydraulic fluid port；Wherein:
The flow-guiding channel for being connected to the driving chamber with the variable chamber is offered on the first piston；
Throttle mechanism is also installed on the first piston, the throttle mechanism includes:
Throttle body, changes the passage section of the flow-guiding channel by flexible；
Third spring provides elastic force for the throttling body.
7. a kind of hydraulic mechanism, comprising: brake pedal, master cylinder, pump, brake piping, oil return line, the first valve member, second
Valve member and electronic control unit, first valve member are set on the brake piping, and second valve member is set to described
On oil return line；The electronic control unit is disposed for controlling the opening and closing of first valve member and second valve member,
It is characterized in that, the hydraulic mechanism further includes the brake as described in any one of claim 1 to 5；Wherein:
The brake piping is connected between the driving chamber of the hydraulic cylinder of the pump and the brake.
8. a kind of hydraulic mechanism, comprising: brake pedal, master cylinder, pump, brake piping, oil return line, the first valve member, second
Valve member and electronic control unit, first valve member are set on the brake piping, and second valve member is set to described
On oil return line；The electronic control unit is disposed for controlling the opening and closing of first valve member and second valve member,
It is characterized in that, the hydraulic mechanism further includes electric control one-way valve and brake as claimed in claim 6；Wherein:
The brake piping is connected between the driving chamber of the hydraulic cylinder of the pump and the brake；
Second hydraulic fluid port connects an oil return branch, and the electric control one-way valve is set to the oil return branch road；
The electronic control unit is configured to: when the indoor actual pressure of the driving chamber of the hydraulic cylinder in the brake is greater than
When default opening pressure, controls the electric control one-way valve and open；
The default opening pressure is less than the preset pressure.
9. hydraulic mechanism according to claim 8, which is characterized in that the oil return line is connected to the liquid of the brake
To form closed circuit with the brake piping between cylinder pressure and the pump；
The oil return branch is connected on the oil return line between the pump and second valve member.
10. a kind of intelligent mobile vehicle, which is characterized in that including the hydraulic press as described in any one of claim 7 to 9
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910188503.9A CN109826887B (en) | 2019-03-13 | 2019-03-13 | Brake, hydraulic pressure mechanism and intelligent mobile vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910188503.9A CN109826887B (en) | 2019-03-13 | 2019-03-13 | Brake, hydraulic pressure mechanism and intelligent mobile vehicle |
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| CN109826887A true CN109826887A (en) | 2019-05-31 |
| CN109826887B CN109826887B (en) | 2020-08-28 |
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| CN201910188503.9A Expired - Fee Related CN109826887B (en) | 2019-03-13 | 2019-03-13 | Brake, hydraulic pressure mechanism and intelligent mobile vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727951A (en) * | 2021-01-29 | 2021-04-30 | 山东交通学院 | Brake with auxiliary braking function |
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| Publication number | Publication date |
|---|---|
| CN109826887B (en) | 2020-08-28 |
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