A kind of check valve with damping action
The present invention relates to the fields of brake system of car, and in particular to a kind of check valve with damping action.
It is well known that automobile electron stabilization control system is the important guarantee of traffic safety, ABS, ASR, ESP may be implemented
Etc. functions, while auxiliary can also be cooperated to drive the functions such as AEB, provide more convenient safe service for driver.In order to realize
To the function that each wheel wheel cylinder hydraulic pressure is adjusted, electronic stabilizing control system needs hydraulic control actuator and its component,
Hydraulic actuator includes metal base and the hydraulic unit being fixed thereon.The present invention is a kind of check valve with damping action,
For the important composition of hydraulic unit, pressure medium in hydraulic system can be transmitted while providing damping action for system.This band resistance
The check valve of Buddhist nun's effect plays adjustment effect to hydraulic pulsation, together in the oil circuit between accumulator, regulating valve and plunger pump
When play the role of unidirectional cutoff to oil circuit.The case where geometry of check valve runner with damping action can influence noise is led to
Chang Liudao includes suitable diminution part, which plays throttling action, generates hydraulic low-pass filter, generates front to noise
It influences.And brake fluid kinematic viscosity between 0-120 DEG C almost it is believed that constant, optimal throttling action is directed to the temperature range
It is provided.
In prior art, check valve of the electronic stabilizing control system hydraulic actuator with damping action is by valve pocket, valve
The compositions such as seat, steel ball, unidirectional spring such as Fig. 1, wherein valve pocket hydraulic medium area of passage is larger, the check valve stream with damping action
Road is weaker to hydraulic damping effect, and larger pulsation brake fluid is also easy to produce noise when flowing through and influences product driving load, causes to drive
The person of sailing is also easy to produce partially soft braking feel when braking, and influences driving experience.
Summary of the invention
It is an object of the invention to overcome the shortcomings of the prior art, and provide a kind of check valve with damping action.
The object of the present invention is achieved by the following technical solutions: this check valve with damping action, main to wrap
Valve seat, steel ball are included, valve pocket is equipped in valve seat, unidirectional spring is installed in valve pocket, one end of steel ball is withstood on unidirectional spring, steel ball
The other end withstand at the top of valve seat on the oil inlet being equipped with, seat bottom portion is equipped with oil outlet.The valve pocket outer wall is equipped with valve pocket
Department of assembly B, valve pocket go out oil groove, valve pocket crosses oil groove, valve pocket oil-feed tank, and constitute brake fluid oil duct with valve base inner wall；Valve pocket is excessively oily
Pasta product of crossing at slot becomes smaller, and plays throttling action；The valve sleeving inner wall and steel ball are clearance fit, can make steel ball it is axial from
By moving, and the steel ball direction of motion is parallel with brake fluid flow direction.
The valve pocket and valve seat interference fit fasten, and provide fixed support for unidirectional spring.
The valve pocket uses plastic material injection molding, and there is chamfering at the both ends of valve pocket.
Preferably, the valve pocket is closed at one end, facilitates unidirectional spring installation to fix, reduce manufacturing process difficulty.
Preferably, the axis of the oil inlet is parallel with the axis of valve pocket.
Preferably, the valve seat oil inlet outer wall groove is provided with circular arc chamfering, it can be to avoid generation stress collection when indentation
In, extend the service life of valve seat.
The invention has the benefit that
1, valve pocket oil duct groove is changed compared with current programme, is reduced brake fluid and is crossed pasta product, forms throttle block
Buddhist nun hole provides bigger damping for hydraulic system, avoids plunger pump internal over pressure, reduces driving load, makes an uproar to reduce product
2, it due to groove throttling action, is only played a role when pressure oscillation is greater than threshold value Shi Caihui, when being lower than threshold value,
It does not work, braking medium normally transmits.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the prior art.
Fig. 2 is the housing configuration schematic diagram of the prior art.
Fig. 3 is structural schematic diagram of the invention.
Fig. 4 is housing configuration schematic diagram of the invention.
Description of symbols: valve seat 1, steel ball 2, valve pocket B3, unidirectional spring 4, valve pocket A5, valve pocket department of assembly B301, valve pocket
Oil groove 302, valve pocket cross oil groove 303, valve pocket oil-feed tank 304, valve pocket department of assembly A501, oil duct 502, oil inlet P 1, oil outlet out
Below in conjunction with attached drawing, the present invention will be described in detail:
Embodiment: as shown in the picture, this check valve with damping action includes mainly valve seat 1, steel ball 2, in valve seat 1
Equipped with valve pocket 3, unidirectional spring 4 is installed in valve pocket 3, one end of steel ball 2 is withstood on unidirectional spring 4, and the other end of steel ball 2 is withstood on
In the oil inlet P 1 being equipped at the top of valve seat 1, oil inlet P 1 has conical seal (contact) face, can be fitted close with steel ball 2, plays sealing and makees
With brake fluid is flowed into the check valve with damping action by oil inlet P 1, and 1 bottom of valve seat is equipped with oil outlet P2.Unidirectional spring 4
There are certain pretightning force when installation, seal steel ball 2 and tapered surface close-fitting, this power that when starting overcomes, i.e. starting pressure.It can
By changing the stiffness tuning damper cracking pressure of unidirectional spring 4, the pressure of not homologous ray is adapted to.
3 outer wall of valve pocket be equipped with valve pocket department of assembly B301, valve pocket goes out oil groove 302, valve pocket crosses oil groove 303, valve pocket into
Oil groove 304, and brake fluid oil duct, valve pocket outer wall oil duct groove and step, the presence of valve pocket oil duct step are constituted with 1 inner wall of valve seat
Keep area of passage smaller, forms throttle position, bigger hydraulic damping can be provided and reduce hydraulic pulsation, driving can also be reduced
Driving power needed for piston pump.
3 inner wall of valve pocket and steel ball 2 are clearance fit, steel ball 2 can be made in axial free movement, and 2 side of moving of steel ball
To parallel with brake fluid flow direction.
The valve pocket 3 is fastened with the interference fit of valve seat 1, and provides fixed support for unidirectional spring 4.
The valve pocket 3 uses plastic material injection molding, facilitates installation and production；And there is chamfering at the both ends of valve pocket 3, it is convenient
Product installation indentation valve seat 1.
The working principle of the invention: normal condition steel ball 2 makes check valve be in close under the effect of 4 pretightning force of unidirectional spring
Envelope state generates a unlatching hydraulic coupling when braking medium flows through the check valve with damping action, when hydraulic coupling is greater than spring
When power, unidirectional spring 4 finds deformation, 2 change in location of steel ball, the unidirectional valve events with damping action.Brake fluid passes through oil inlet
P1 enters inside valve seat, and brake fluid crosses oil groove 303 by valve pocket oil-feed tank 304 and valve pocket, crosses oil groove 303 due to valve pocket and crosses pasta
Product becomes smaller, and plays throttling action, increases system damping.Brake fluid goes out the outflow of oil groove 302 by valve pocket, eventually by oil outlet
P2 flows to other assemblies.Due to the effect of unidirectional spring 4 and steel ball, brake fluid can only be from 1 one-way flow of oil inlet P to oil outlet
It is understood that it will be understood by those skilled in the art that being subject to technical solution of the present invention and inventive concept
It all should fall within the scope of protection of the appended claims of the present invention with replacement or change.