CN207345784U - A kind of electric vehicle brake master cylinder for preventing dead electricity from failing - Google Patents
A kind of electric vehicle brake master cylinder for preventing dead electricity from failing Download PDFInfo
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- CN207345784U CN207345784U CN201720840500.5U CN201720840500U CN207345784U CN 207345784 U CN207345784 U CN 207345784U CN 201720840500 U CN201720840500 U CN 201720840500U CN 207345784 U CN207345784 U CN 207345784U
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Abstract
The utility model discloses a kind of electric vehicle brake master cylinder for preventing dead electricity from failing, including the cylinder body equipped with inner cavity, the inner cavity is equipped with first order assembly for plunger successively from front to back, second level assembly for plunger, first order piston assembly, second level piston assembly, first order plunger return spring is equipped between the first order assembly for plunger and second level assembly for plunger, second level plunger return spring is equipped between the second level assembly for plunger and first order piston assembly, first order piston reset spring is equipped between the first order piston assembly and second level piston assembly, second level piston reset spring is equipped between the second level piston assembly and intracavity posterior end.The utility model solves system cut-off, full decoupling braking system accident power-off, and the unsafe condition under brake force deficiency and brake fluid miss status, the brake fluid of storage chamber does not interfere with the brake feel of conventional brake state.
Description
Technical field
It the utility model is related to automobile brake technical field, and in particular to a kind of brake fluid for applying to electric vehicle brake
Pressure system.
Background technology
With developing rapidly for electric automobile, braking system is since electric car is using non-internal combustion engine offer power.Braking system
System power-assisted part lacks vacuum source.Then braking system of electric car is forced to be changed.So occur in braking system
Braking maneuver performs the operating mode of decoupling with braking, and braking maneuver is the action that driver steps on brake pedal, and braking performs
The as action of friction plate and brake disc or brake drum effect.During this is isolated, the braking maneuver of driver makes system
Move the braking of master cylinder discharge also and be not directly placed on brake actuator, be included in pedal simulator, but when burst System powers off
Situation, brake fluid is into that can not return to master cylinder after such as pedal simulator, it is necessary to extra braking when wheel cylinder brake force is insufficient at this moment
When liquid supplement wheel cylinder provides brake force, traditional master cylinder can not meet this special circumstances, and a kind of then reply of utility model should
The master cylinder of kind contingency condition is necessary.
Utility model content
Technical problem to be solved in the utility model is just to provide a kind of electric vehicle brake master for preventing dead electricity from failing
Cylinder, master cylinder can be powered off in braking system, and brake fluid provides extra required brake fluid when being sealed in pedal simulator, at the same time
Braking system is not interfered with during conventional brake.
In order to solve the above technical problems, the utility model adopts the following technical solution：It is a kind of to prevent dead electricity from failing electronic
Automobile braking master cylinder, including the cylinder body equipped with inner cavity, the inner cavity are equipped with first order assembly for plunger, the second level successively from front to back
Assembly for plunger, first order piston assembly, second level piston assembly, between the first order assembly for plunger and second level assembly for plunger
Equipped with first order plunger return spring, answered between the second level assembly for plunger and first order piston assembly equipped with second level plunger
Position spring, is equipped with first order piston reset spring between the first order piston assembly and second level piston assembly, and described second
Second level piston reset spring is equipped between level piston assembly and intracavity posterior end, the inner cavity is in first order assembly for plunger and second
P1 chambers are equipped between level assembly for plunger, the inner cavity is equipped with P2 chambers between second level assembly for plunger and first order piston assembly,
The inner cavity is equipped with P3 chambers between first order piston assembly and second level piston assembly, and the inner cavity is in second level piston assembly
P4 chambers are equipped between intracavity posterior end, the P1 chambers and P2 chambers are connected with pedal simulator, and the P3 chambers connect wheel cylinder with P3 chambers,
The P3 chambers connect the oriented unilaterally connected check valve of P1 chambers, and the P4 chambers connect the oriented unilaterally connected check valve of P2 chambers, institute
State and unilaterally connected check valve from the front to the back is equipped with first order piston assembly and second level piston assembly；When under normal condition
When stepping on braking, P1 chambers and P2 chambers brake fluid enter pedal simulator, and when braking system powers off, brake pedal is stepped on down
And during brake force deficiency, driver's depth pedal, is moved, final P3 after making first order piston assembly and second level piston assembly continuation
It will enter wheel cylinder compensation brake force with P4 chambers brake fluid.
Preferably, the P1 chambers are connected via a normally closed solenoid valve with pedal simulator, and the P2 chambers are normal via one
Open electromagnetic valve is connected with pedal simulator.
Preferably, the rear portion of the inner cavity is more than the stepped hole of anterior diameter for diameter, and the side wall of the stepped hole corresponds to
P3 chambers and P3 chambers position are machined with a unidirectional valve opening respectively, and check valve is provided with the unidirectional valve opening.
Preferably, it is integrated with the unidirectional valve opening by cylinder body check valve steel ball, cylinder body one-way valve spring, cylinder body check valve
The check valve that baffle ring is formed.
Preferably, cover and be threaded and seal groove, the rear cover are connected by screw thread with intracavity posterior end after described,
The sealing ring with the sealing of intracavity posterior end mouth is equipped with the seal groove.
Preferably, the check valve in the first order piston assembly and second level piston assembly by piston one-way valve spring,
One-way valve seat and sealed steel ball are formed, and the one-way valve seat is equipped with valve opening, and the sealed steel ball is made in piston one-way valve spring
With lower one-way seal valve hole.
The technical solution adopted in the utility model, when braking is stepped under normal condition, P1 and P2 chambers brake fluid enters
Pedal simulator.Work as abnormal condition, system cut-off, when brake pedal has been stepped on down and brake force is insufficient, driver tramples deeply
Plate, P3 and P4 chambers brake fluid will enter wheel cylinder compensation brake force.
The beneficial effects of the utility model are：Solves system cut-off, full decoupling braking system accident power-off, brake force is not
Unsafe condition under foot and brake fluid miss status, the brake fluid of storage chamber do not interfere with the brake feel of conventional brake state.
Brief description of the drawings
The utility model is further described with reference to the accompanying drawings and detailed description：
Fig. 1 is the utility model outlet end structure diagram.
Fig. 2 is the utility model inlet end structure schematic diagram.
Fig. 3 is the cylinder body schematic diagram of the utility model.
Fig. 4 is the structure diagram of the first order piston assembly/second level piston assembly of the utility model.
Fig. 5 is the utility model rear cover schematic diagram.
Fig. 6 is the utility model conventional sense schematic diagram.
Fig. 7 is the utility model secondary work stage schematic diagram.
Fig. 8 is the utility model third level working stage schematic diagram.
Embodiment
The technical solution of the utility model embodiment is explained with reference to the attached drawing of the utility model embodiment and
Illustrate, but following embodiments are only the preferred embodiment of the utility model, and it is not all.Based on the embodiment in embodiment,
Those skilled in the art obtain other embodiment on the premise of creative work is not made, and belong to the utility model
Protection domain.
As depicted in figs. 1 and 2, a kind of electric vehicle brake master cylinder for preventing dead electricity from failing, including the cylinder body 3 equipped with inner cavity
The inner cavity is equipped with first order assembly for plunger 1, second level assembly for plunger 2, first order piston assembly 4, second successively from front to back
Level piston assembly 6, is equipped with first order plunger return spring, institute between the first order assembly for plunger 1 and second level assembly for plunger 2
State and second level plunger return spring, first order assembly for plunger are equipped between second level assembly for plunger 2 and first order piston assembly 4
1st, second level assembly for plunger 2 is equipped with Y types sealing ring 12.Between the first order piston assembly 4 and second level piston assembly 6
Equipped with first order piston reset spring 5, second level piston reset bullet is equipped between the second level piston assembly 6 and intracavity posterior end
Spring 7, the inner cavity are equipped with P1 chambers between first order assembly for plunger 1 and second level assembly for plunger 2, and the inner cavity is in second level column
P2 chambers are equipped between plug assembly 2 and first order piston assembly 4, the inner cavity is total in first order piston assembly 4 and second level piston
P3 chambers are equipped between into 6, the inner cavity is equipped with P4 chambers, the P1 chambers and P2 between second level piston assembly 6 and intracavity posterior end
Chamber is connected with pedal simulator, and the P3 chambers connect wheel cylinder with P3 chambers, and it is unilaterally connected unidirectional that the P3 chambers connect oriented P1 chambers
Valve, the P4 chambers connect the oriented unilaterally connected check valve of P2 chambers, the first order piston assembly 4 and second level piston assembly 6
On be equipped with unilaterally connected check valve from the front to the back.
When braking is stepped under normal condition, P1 chambers and P2 chambers brake fluid enter pedal simulator, when braking system is broken
Electricity, when brake pedal has been stepped on down and brake force is insufficient, driver's depth pedal, makes first order piston assembly and second level piston
Assembly moves after continuing, and final P3 and P4 chambers brake fluid will enter wheel cylinder compensation brake force.
As shown in figures 1 and 3, the rear portion of the inner cavity is more than the stepped hole 31 of anterior diameter, the stepped hole for diameter
Side wall correspond to P3 chambers and P3 chambers position is machined with a unidirectional valve opening 32 respectively, check valve is installed in the unidirectional valve opening.
It is integrated with the unidirectional valve opening and is made of cylinder body check valve steel ball 9, cylinder body one-way valve spring 10, cylinder body check valve baffle ring 11
Check valve.The rear port of the inner cavity offers positioning step hole 33, and positioning step hole offers internal thread.
As shown in Figure 1 and Figure 5, the rear cover 8 is equipped with connection boss, connects and external screw thread 81 is machined with boss, and connection is convex
Seal groove 82 is equipped between platform rear end and rear postoperculum, the rear cover is connected by external screw thread 81 and intracavity posterior end mouth internal thread
Connect, the sealing ring with the sealing of intracavity posterior end mouth is equipped with seal groove.
As shown in figure 4, the first order piston assembly 4 and second level piston assembly 6 include piston only 41/61, piston
Body central offers ladder valve opening, and check valve is arranged in ladder valve opening, and check valve is by piston one-way valve spring 43/63, unidirectional
Valve seat 44/64 and sealed steel ball 45/65 are formed, and the one-way valve seat 44/64 is equipped with valve opening, and the sealed steel ball 45/65 exists
The lower one-way seal valve hole of the effect of one-way valve spring 43/63.Piston only is cylindrical to be equipped with seal groove, and sealing ring is provided with seal groove
42/62。
As shown in fig. 6, executable portion is braked to form the full decoupled structure of electric parking brake system by master cylinder, it is described
P1 chambers are connected via a normally closed solenoid valve with pedal simulator, and the P2 chambers are via a normally open solenoid valve and pedal simulator
Connection.P1 chambers and P4 chamber unicom, P2 chambers and P3 chamber unicom.
In conventional brake process, alternate brake sap cavity room brake fluid, which will not flow out, impacts conventional braking system, only
Have when pressure of wheel braking cylinder deficiency, the brake fluid of spare chamber can just compensate wheel cylinder, realize and compensate braking.
As shown in fig. 7, brake pressure is established and braked when braking executable portion routine work to be made of the utility model
Liquid stream is to signal.When driver, which performs, to brake, flow into wheel cylinder pipeline and closed by solenoid valve, flow into the solenoid valve of pedal simulator
Open, promote the first assembly for plunger 1 to move forward, two assembly for plunger chambers establish pressure P1 and P2, and liquid storage cylinder two-piston chamber is established
Pressure is P3 and P4, due to having between P1 and P4 chambers between check valve Δ P4, P2 and P3 chamber by check valve Δ P3, so P3 and P4
The brake fluid of intracavitary cannot be introduced into pedal simulator.
As shown in figure 8, for by the utility model form braking executable portion power-off failure work schedule dynamic pressure establish and
Brake oil flow is illustrated.When being powered off in braking procedure, solenoid valve power-off restoration, the brake fluid of pedal simulator is mothballed in stepping on
There is brake fluid missing in plate simulator, master cylinder, and the pipeline of unicom wheel cylinder is opened, and when wheel cylinder brake force deficiency, driver can lead to
It is too deep to step on brake pedal, make 4 second piston assembly 6 of first piston assembly continue to move forward, lift P3, P4 chamber pressures, make P4 ＞
P1, P3 ＞ P2, you can push the check valve on cylinder body open, brake force supplement is carried out for wheel cylinder.
When master cylinder is in the case where decoupling braking system power cutoff state, after brake fluid is enclosed in pedal simulator, brake fluid
During amount deficiency, and when brake force does not reach, the method compensation braking masterpiece of existing compensation brake fluid is treaded deeply by driver's inertia
With.The master cylinder can be powered off in braking system, and brake fluid provides extra required brake fluid when being sealed in pedal simulator, together
When conventional brake when do not interfere with Braking system.
The utility model solves braking system under powering-off state, and wheel cylinder brake force deficiency, brake fluid, which is mothballed, to be caused to make
Hydrodynamic deficiency can not provide the situation of braking for wheel cylinder feed flow in time, improve the security of braking system.
The above, is only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, it is familiar with the those skilled in the art and should be understood that the utility model includes but not limited to attached drawing and above specific embodiment party
Content described in formula.The modification of any function and structure principle without departing from the utility model is intended to be included in claims
Scope in.
Claims (6)
1. a kind of electric vehicle brake master cylinder for preventing dead electricity from failing, including the cylinder body equipped with inner cavity, it is characterised in that in described
Chamber is total equipped with first order assembly for plunger, second level assembly for plunger, first order piston assembly, second level piston successively from front to back
Into being equipped with first order plunger return spring, the second level column between the first order assembly for plunger and second level assembly for plunger
Second level plunger return spring is equipped between plug assembly and first order piston assembly, the first order piston assembly is lived with the second level
First order piston reset spring is equipped between plug assembly, the second level is equipped between the second level piston assembly and intracavity posterior end and is lived
Resetting spring is filled in, the inner cavity is equipped with P1 chambers between first order assembly for plunger and second level assembly for plunger, and the inner cavity is the
P2 chambers are equipped between two level assembly for plunger and first order piston assembly, the inner cavity is in first order piston assembly and second level piston
P3 chambers are equipped between assembly, the inner cavity is equipped with P4 chambers, the P1 chambers and P2 between second level piston assembly and intracavity posterior end
Chamber is connected with pedal simulator, and the P3 chambers connect wheel cylinder with P3 chambers, and it is unilaterally connected unidirectional that the P3 chambers connect oriented P1 chambers
Valve, the P4 chambers connect the oriented unilaterally connected check valve of P2 chambers, in the first order piston assembly and second level piston assembly
It is equipped with unilaterally connected check valve from the front to the back；When braking is stepped under normal condition, P1 chambers and P2 chambers brake fluid enter
Pedal simulator, when braking system powers off, and brake pedal has been stepped on down and brake force is insufficient, driver's depth pedal, makes the
First stage piston assembly and second level piston assembly move after continuing, and final P3 and P4 chambers brake fluid will enter wheel cylinder compensation brake force.
A kind of 2. electric vehicle brake master cylinder for preventing dead electricity from failing according to claim 1, it is characterised in that：The P1
Chamber is connected via a normally closed solenoid valve with pedal simulator, and the P2 chambers connect via a normally open solenoid valve and pedal simulator
Connect.
A kind of 3. electric vehicle brake master cylinder for preventing dead electricity from failing according to claim 1, it is characterised in that：In described
The rear portion of chamber is more than the stepped hole of anterior diameter for diameter, and the side wall of the stepped hole corresponds to P3 chambers and P3 chambers position processes respectively
There is a unidirectional valve opening, check valve is installed in the unidirectional valve opening.
A kind of 4. electric vehicle brake master cylinder for preventing dead electricity from failing according to claim 3, it is characterised in that：The list
The check valve being made of cylinder body check valve steel ball, cylinder body one-way valve spring, cylinder body check valve baffle ring is integrated with into valve opening.
A kind of 5. electric vehicle brake master cylinder for preventing dead electricity from failing according to claim 3, it is characterised in that：The cylinder
The rear side of body is equipped with rear cover, covers and is threaded and seal groove after described, and the rear cover passes through screw thread and connects with intracavity posterior end
Connect, the sealing ring with the sealing of intracavity posterior end mouth is equipped with the seal groove.
A kind of 6. electric vehicle brake master cylinder for preventing dead electricity from failing according to claim 1, it is characterised in that：Described
Check valve on first stage piston assembly and second level piston assembly is by piston one-way valve spring, one-way valve seat and sealed steel ball structure
Into the one-way valve seat is equipped with valve opening, sealed steel ball one-way seal valve hole under the effect of piston one-way valve spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720840500.5U CN207345784U (en) | 2017-07-12 | 2017-07-12 | A kind of electric vehicle brake master cylinder for preventing dead electricity from failing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720840500.5U CN207345784U (en) | 2017-07-12 | 2017-07-12 | A kind of electric vehicle brake master cylinder for preventing dead electricity from failing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207345784U true CN207345784U (en) | 2018-05-11 |
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ID=62360238
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720840500.5U Active CN207345784U (en) | 2017-07-12 | 2017-07-12 | A kind of electric vehicle brake master cylinder for preventing dead electricity from failing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207345784U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107351829A (en) * | 2017-07-12 | 2017-11-17 | 浙江亚太机电股份有限公司 | A kind of electric vehicle brake master cylinder for preventing dead electricity from failing |
-
2017
- 2017-07-12 CN CN201720840500.5U patent/CN207345784U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107351829A (en) * | 2017-07-12 | 2017-11-17 | 浙江亚太机电股份有限公司 | A kind of electric vehicle brake master cylinder for preventing dead electricity from failing |
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