CN208203678U - A kind of brake system of car special piston accumulator - Google Patents

Abstract

The utility model relates to a kind of brake system of car special piston accumulator, it includes cylinder body and is set to the intracorporal piston of cylinder；The oil groove of accommodating butter is circumferentially additionally provided on the piston；The seal groove one and seal groove two are the dovetail groove of outer narrow inner width；The bottom of the seal groove one offers the oil duct being connected to oil pocket one, and the bottom of the seal groove two offers the oil duct being connected to air cavity two, and sealing respectively in the end of oil duct one and oil duct two has pressure limiting elastic slice one and pressure limiting elastic slice two.The advantages of brake system of car special piston accumulator disclosed in the utility model, the simple, low-profile with structure, high production efficiency, can further decrease production cost, reduce installation space；And there is the advantages of action sensitivity is high, sealing effect is good, long service life.

Description

A kind of brake system of car special piston accumulator

Technical field

The utility model relates to a kind of piston power accumulators, and in particular to a kind of brake system of car special piston accumulator.

Background technique

Piston power accumulator is a kind of relatively common auxiliary device in hydraulic system, and the principle of piston accumulator is exactly Energy is put aside using the compressible type of nitrogen, hydraulic oil is just pushed out the external world with the energy that nitrogen is put aside when needing Work.It can not only play buffering and Noise Reduction, but also can save a large amount of energy, thus be widely used.In recent years, with Automobile sales volume it is increasing, automobile industry is increasing to the demand of hydraulic braking piston power accumulator.But the prior art In piston power accumulator usually there are following some defects:

1, the hydraulic braking accumulator in existing automobile industry has volume big, the low disadvantage of production efficiency, and due to Its volume just needs greatly bigger installation space, and production efficiency is low, will lead to the increase of production cost；

2, existing piston accumulator in actual use, due to only with sealing ring to the intracorporal oil gas of cylinder carry out Seal isolation, sealing effect is poor, when air cavity inner wall will generate heat to piston during exercise, sealing ring is be easy to cause to be in dry Friction or semi-dry friction state lead to the reduction of sealing ring service life, and the frictional force between piston and cylinder body increases, sensitive Degree reduces；

3, existing piston accumulator in actual use, due to only with sealing ring to the intracorporal oil gas of cylinder carry out Seal isolation, sealing effect is poor, and cylinder body is easy to happen leakage, and leakage is divided into external leakage and internal leakage, and external leakage refers to hydraulic Oil leakage is in the outside of cylinder body, although internal leakage will not generate the leakage of hydraulic oil, due to leaking, and set control Movement may be subjected to influence, or even cause the system failure.

Utility model content

The purpose of this utility model is to propose a kind of brake system of car special piston accumulator, simple with structure, The advantages of low-profile, high production efficiency, can further decrease production cost, reduce installation space；And there is movement spirit The advantages of sensitivity is high, sealing effect is good, long service life.

The purpose of this utility model is following technical proposals to realize:

A kind of brake system of car special piston accumulator, including cylinder body and it is set to the intracorporal piston of cylinder, the piston will The inner cavity of cylinder body is divided into oil pocket and air cavity, and it is gentle that the cylinder body at the both ends of corresponding oil pocket and air cavity is respectively equipped with hydraulic fluid port end cap Mouth end cap；The hydraulic fluid port end cap is equipped with oil-through-hole, is equipped with and connects in the position of corresponding oil-through-hole on the end face of the hydraulic fluid port end cap The oil valve of logical oil pocket；The port end cap is equipped with aeration aperture, in the position of corresponding aeration aperture on the end face of the port end cap Charge valve equipped with connection air cavity；The sealing ring of accommodating sealing ring one and sealing ring two is circumferentially offered on the piston respectively Slot one and seal groove two；The seal groove one is arranged close to oil pocket, and the seal groove two is arranged close to air cavity；The work It is circumferentially additionally provided with the oil groove of accommodating butter beyond the Great Wall, the oil groove is set between sealing ring one and sealing ring two；The sealing ring Slot one and seal groove two are the dovetail groove of outer narrow inner width, the shape of the sealing ring one and sealing ring two respectively with sealing ring Slot one and seal groove two match；The bottom of the seal groove one offers the oil duct being connected to oil pocket one, described The bottom of seal groove two offers the oil duct being connected to air cavity two, seals respectively in the end of oil duct one and oil duct two limited Elastic slice one and pressure limiting elastic slice two are pressed, is perfused with hydraulic oil in the oil duct one and oil duct two.

Further, the hydraulic fluid port end cap and port end cap are that laser welding in cylinder body corresponds to the two of oil pocket and air cavity End.

Further, the oil valve and charge valve difference laser welding are on the end face of hydraulic fluid port end cap and the end of port end cap On face.

Further, the both ends of the piston offer installation in the position of the end of corresponding oil duct one and oil duct two respectively Slot one and mounting groove two, the pressure limiting elastic slice one and pressure limiting elastic slice two are separately mounted in mounting groove one and mounting groove two.

Further, when pressure limiting elastic slice one and pressure limiting elastic slice two are located in mounting groove one and mounting groove two, pressure limiting The lateral surface of elastic slice one and pressure limiting elastic slice two respectively with two end faces of piston.

Further, the bottom of the seal groove one and seal groove two offers Oil Guide groove one and Oil Guide ditch respectively Slot two, the width of the Oil Guide groove one are greater than the internal diameter of oil duct one, and the width of the Oil Guide groove two is greater than the interior of oil duct two Diameter.

Further, guide ring is also embedded between the piston and cylinder body.

Further, the guide ring is one.

Further, the guide ring is set between sealing ring one and oil groove.

Further, the cylinder body offers outage and mudhole on the inner wall of corresponding oil pocket.

The utility model has the beneficial effects that:

(1) the brake system of car special piston accumulator in the utility model is circumferentially additionally provided with appearance on the piston The oil groove of butter is set, the oil groove is set between sealing ring one and sealing ring two；By the way that oil groove is arranged, in oil groove content when assembly Radix Astragali is set, both buffer action can be played to other leakages in air cavity, moreover it is possible to play the work of lubrication and cooling to air cavity inner wall With, it is therefore prevented that sealing ring one and sealing ring two are in dry friction or semi-dry friction state, improve the automobile in the utility model The sensitivity of braking system special piston accumulator, extends the service life of sealing ring one and sealing ring two.

(2) the brake system of car special piston accumulator in the utility model；The seal groove one and seal groove Two be the dovetail groove of outer narrow inner width, the shape of the sealing ring one and sealing ring two respectively with seal groove one and seal groove Two match；The bottom of the seal groove one offers the oil duct being connected to oil pocket one, the bottom of the seal groove two Portion offers the oil duct being connected to air cavity two, and sealing respectively in the end of oil duct one and oil duct two has pressure limiting elastic slice one and pressure limiting Elastic slice two is perfused with hydraulic oil in the oil duct one and oil duct two；Seal groove one and seal groove two are disposed as outer The dovetail groove of narrow inner width, and pass through the matching in two structure of sealing ring one and sealing ring；Such sealing structure when being worked, The intracorporal hydraulic oil of cylinder pushes piston to slide into cylinder body, and piston passes through the pressure limiting elastic slice one and pressure limiting elastic slice on two surface Two are transferred to the intracorporal oil pressure of cylinder and air pressure the sealing ring bottom of seal groove one and seal groove two, and push sealing ring One and sealing ring two outward, i.e., to inboard wall of cylinder block squeeze, can make to keep good between sealing ring one, sealing ring two and inboard wall of cylinder block Good air-tightness, it is therefore prevented that inside let out the generation of phenomenon；In addition, since seal groove one and seal groove two are inner wide and outer narrow Dovetail groove, when sealing ring one and sealing ring two outwardly against when, the two sides of sealing ring one are more felt nervous with the side wall of seal groove one Close, the two sides of sealing ring two and the side wall of seal groove two are similarly also more closely, therefore, in oil duct one and oil duct two Hydraulic oil can not also be leaked from seal groove one and seal groove two, the brake system of car special piston in the utility model Accumulator has good leakproofness.

(3) the brake system of car special piston accumulator of the utility model, the hydraulic fluid port end cap and port end cap are Laser welding corresponds to the both ends of oil pocket and air cavity in cylinder body；The oil valve and charge valve difference laser welding are at the end of hydraulic fluid port end cap On on the face and end face of port end cap；The connection of the hydraulic fluid port end cap and port end cap and oil valve and charge valve of the utility model Mode is using laser welding, and laser welding has the advantages that following: excellent welding performance, laser power are big, and weld seam has There is high depth-to-width ratio, heat-affected zone is small, and deformation is small, and speed of welding is fast, the high smooth beautiful, pore-free of weldquality, postwelding material Material toughness at least corresponds to fertile material.Therefore, the use longevity of the brake system of car special piston accumulator of the utility model Life is extended, and manufacturing cost is reduced in the case where co-content, weight is alleviated, reduces volume, than other co-contents Product weight alleviate 30% or more, volume reduces 30% or more, and manufacturing cost also reduces 50% or more.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of the utility model embodiment；

Fig. 2 is the enlarged structure schematic diagram in the portion A in Fig. 1.

In figure: 1, cylinder body；2, piston；3, oil pocket；4, air cavity；5, hydraulic fluid port end cap；6, port end cap；7, oil-through-hole；8, oily Valve；9, aeration aperture；10, charge valve；11, sealing ring one；12, sealing ring two；13, oil groove；14, pressure limiting elastic slice one；15, pressure limiting bullet Piece two；16, mounting groove one；17, mounting groove two；18, Oil Guide groove one；19, Oil Guide groove two；20, guide ring；21, outage； 22, mudhole；23, oil duct one；24, oil duct two.

Specific embodiment

To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work Obtained all other embodiment is put, the range that the utility model is protected is belonged to.

It is as depicted in figs. 1 and 2:

A kind of 2 accumulator of brake system of car special piston, the piston 2 including cylinder body 1 and in cylinder body 1, the work The inner cavity of cylinder body 1 is divided into oil pocket 3 and air cavity 4 by plug 2, and the cylinder body 1 is respectively equipped at the both ends of corresponding oil pocket 3 and air cavity 4 Hydraulic fluid port end cap 5 and port end cap 6；The hydraulic fluid port end cap 5 is equipped with oil-through-hole 7, leads on the end face of the hydraulic fluid port end cap 5 corresponding The position of oilhole 7 is equipped with the oil valve 8 of connection oil pocket 3；The port end cap 6 is equipped with aeration aperture 9, the end of the port end cap 6 The charge valve 10 of connection air cavity 4 is equipped on face in the position of corresponding aeration aperture 9；Appearance is circumferentially offered respectively on the piston 2 Set the seal groove one and seal groove two of sealing ring 1 and sealing ring 2 12；The seal groove one is arranged close to oil pocket 3, The seal groove two is arranged close to air cavity 4.

In the present embodiment, the hydraulic fluid port end cap 5 and port end cap 6 are that laser welding is gentle in the corresponding oil pocket 3 of cylinder body 1 The both ends of chamber 4；The oil valve 8 and charge valve 10 distinguish laser welding on the end face of hydraulic fluid port end cap 5 and the end face of port end cap 6 On.The hydraulic fluid port end cap 5 and port end cap 6 and oil valve 8 of the utility model and the connection type of charge valve 10 are using laser Welding, laser welding has the advantages that following: excellent welding performance, laser power are big, and weld seam is with high depth-to-width ratio, hot shadow It is small to ring region, deformation is small, and speed of welding is fast, and the high smooth beautiful, pore-free of weldquality, postwelding toughness of material at least corresponds to mother Body material.Therefore, the service life of 2 accumulator of brake system of car special piston of the utility model is extended, with appearance Manufacturing cost is reduced in the case where product, weight is alleviated, reduces volume, and the product weight than other co-contents alleviates 30% or more, volume reduces 30% or more, and manufacturing cost also reduces 50% or more.

The oil groove 13 of accommodating butter is circumferentially additionally provided on the piston 2, the oil groove 13 is set to sealing ring 1 and close Between seal 2 12.The utility model accommodates Radix Astragali by setting oil groove 13, when assembly in oil groove 13, both can be to air cavity 4 Other interior leakages play buffer action, moreover it is possible to play the role of lubrication and cooling to 4 inner wall of air cavity, it is therefore prevented that sealing ring 1 It is in dry friction or semi-dry friction state with sealing ring 2 12, improves the brake system of car special piston in the utility model The sensitivity of 2 accumulators extends the service life of sealing ring 1 and sealing ring 2 12.

The seal groove one and seal groove two are the dovetail groove of outer narrow inner width, the sealing ring 1 and sealing ring 2 12 shape matches with seal groove one and seal groove two respectively；The bottom of the seal groove one offer one with The oil duct 1 that oil pocket 3 is connected to, the bottom of the seal groove two offers the oil duct being connected to air cavity 42 24, in oil The end of road 1 and oil duct 2 24 is sealed respectively pressure limiting elastic slice 1 and pressure limiting elastic slice 2 15, the oil duct 1 and oil duct two Hydraulic oil is perfused in 24.Seal groove one and seal groove two are disposed as to the dovetail groove of outer narrow inner width, and by close Matching in 2 12 structure of seal 1 and sealing ring；When being worked, the hydraulic oil in cylinder body 1 pushes such sealing structure Piston 2 is slided into cylinder body 1, and piston 2 will be in cylinder body 1 by pressure limiting elastic slice 1 on two surface and pressure limiting elastic slice 2 15 Oil pressure and air pressure be transferred to the sealing ring bottom of seal groove one and seal groove two, and push sealing ring 1 and sealing It encloses 2 12 outward, i.e., is squeezed to 1 inner wall of cylinder body, can make to keep good between 1 inner wall of sealing ring 1, sealing ring 2 12 and cylinder body Good air-tightness, it is therefore prevented that inside let out the generation of phenomenon；In addition, since seal groove one and seal groove two are inner wide and outer narrow Dovetail groove, when sealing ring 1 and sealing ring 2 12 outwardly against when, the two sides of sealing ring 1 and the side wall of seal groove one More closely, the two sides of sealing ring 2 12 and the side wall of seal groove two are similarly also more close, therefore, one 23 He of oil duct Hydraulic oil in oil duct 2 24 can not also be leaked from seal groove one and seal groove two, the automobile brake in the utility model 2 accumulator of system-specific piston has good leakproofness.

In the present embodiment, the both ends of the piston 2 are distinguished in the position of the end of corresponding oil duct 1 and oil duct 2 24 Mounting groove 1 and mounting groove 2 17 are offered, the pressure limiting elastic slice 1 and pressure limiting elastic slice 2 15 are separately mounted to mounting groove one 16 and mounting groove 2 17 in；Also, when pressure limiting elastic slice 1 and pressure limiting elastic slice 2 15 are located at mounting groove 1 and mounting groove When in 2 17, the lateral surface of pressure limiting elastic slice 1 and pressure limiting elastic slice 2 15 respectively with two end faces of piston 2.

In the present embodiment, the bottom of the seal groove one and seal groove two offers one 18 He of Oil Guide groove respectively Oil Guide groove 2 19, the width of the Oil Guide groove 1 are greater than the internal diameter of oil duct 1, the width of the Oil Guide groove 2 19 Greater than the internal diameter of oil duct 2 24.

In the present embodiment, guide ring 20 is also embedded between the piston 2 and cylinder body 1；The guide ring 20 is one；Institute Guide ring 20 is stated to be set between sealing ring 1 and oil groove 13；The setting of guide ring 20, it can be ensured that piston 2 and 1 inner wall of cylinder body Smooth sliding.

In the present embodiment, the cylinder body 1 offers outage 21 and mudhole 22 on the inner wall of corresponding oil pocket 3.Such as Fruit is first 2 accumulator of brake system of car special piston using in the utility model, need to open outage 21 to exclude oil It is turned off after residual air in chamber 3, if this product carries out repair and maintenance, opens the waste oil in the exclusion oil pocket 3 of mudhole 22 And impurity.

The course of work of 2 accumulator of brake system of car special piston of the utility model is as follows:

1, the pressure (such as 160bar) that nitrogen reaches certain is first filled in air cavity 4, charge valve 10 just locks nitrogen In air cavity 4, piston 2 will be pressed onto the one end (lower end) of cylinder body 1 close to 3 end cap of oil pocket by nitrogen, and air cavity 4 produces initial work Make pressure；

2, oil valve 8 is connected to the oil pipe of hydraulic system simultaneously, oil valve 8 is opened by oil-through-hole 7 and hydraulic oil is filled with oil pocket 3, and piston 2 is pushed away toward close to one end (upper end) of 4 end cap of air cavity, about shift middle position or again on lower side onto, wherein gas The pressure of high pressure nitrogen at this time in chamber 4 can be more much larger than 160bar, if piston 2 rests on 1 middle position of cylinder body, nitrogen at this time The pressure of gas should be about 320bar, and (P1, V1 are pressure, the volume of cylinder to P1 × V1=P2 × V2, and P2, V2 are oil cylinder Pressure, volume), at this moment piston 2 has rested on some position, and air cavity 4 is equal, that is, hydraulic oil with the pressure of oil pocket 3 Pressure also reached the same pressure of high pressure nitrogen；

3, when the outside need pressure oil being connected with oil-through-hole 7, just oil valve 8 is opened, high pressure nitrogen, which pushes, at this time lives Plug 2, which can push out hydraulic oil, meets external needs, when nitrogen hydraulic oil release to certain amount when nitrogen pressure at this time Power can also decline that (because the volume of nitrogen becomes larger, P1 × V1=P2 × V2, P1, V1 are pressure, the volume of cylinder, and P2, V2 are Pressure, the volume of oil cylinder), the pressure of the hydraulic oil of the pressure and other end of nitrogen and extraneous pressure reach equal at this time, living Plug 2 at this time just cannot close oil valve 8 again toward extrapolated hydraulic oil；

4, oil-through-hole 7 starts to supplement hydraulic oil in oil pocket 3, and the hydraulic oil of high pressure can persistently pour in cylinder body 1, hydraulic oil Push piston 2 that nitrogen is compressed, so far a working cycles are completed.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with the power Subject to the protection scope that benefit requires.

Claims (10)

1. a kind of brake system of car special piston accumulator, including cylinder body and it is set to the intracorporal piston of cylinder, the piston is by cylinder The inner cavity of body is divided into oil pocket and air cavity, and the cylinder body is respectively equipped with hydraulic fluid port end cap and port at the both ends of corresponding oil pocket and air cavity End cap；The hydraulic fluid port end cap is equipped with oil-through-hole, is equipped with and is connected in the position of corresponding oil-through-hole on the end face of the hydraulic fluid port end cap The oil valve of oil pocket；The port end cap is equipped with aeration aperture, sets on the end face of the port end cap in the position of corresponding aeration aperture There is the charge valve of connection air cavity；The seal groove of accommodating sealing ring one and sealing ring two is circumferentially offered on the piston respectively One and seal groove two；The seal groove one is arranged close to oil pocket, and the seal groove two is arranged close to air cavity；Its feature exists In: the oil groove of accommodating butter is circumferentially additionally provided on the piston, the oil groove is set between sealing ring one and sealing ring two；Institute It states seal groove one and seal groove two is the dovetail groove of outer narrow inner width, the shape difference of the sealing ring one and sealing ring two Match with seal groove one and seal groove two；The bottom of the seal groove one offers the oil duct being connected to oil pocket One, the bottom of the seal groove two offers the oil duct being connected to air cavity two, in the end of oil duct one and oil duct two point Feng there are not pressure limiting elastic slice one and pressure limiting elastic slice two.

2. brake system of car special piston accumulator according to claim 1, it is characterised in that: the hydraulic fluid port end cap and Port end cap is the both ends that laser welding corresponds to oil pocket and air cavity in cylinder body.

3. brake system of car special piston accumulator according to claim 2, it is characterised in that: the oil valve and inflation Valve distinguishes laser welding on the end face of hydraulic fluid port end cap and on the end face of port end cap.

4. brake system of car special piston accumulator described in any one of -3 according to claim 1, it is characterised in that: institute The both ends for stating piston offer mounting groove one and mounting groove two in the position of the end of corresponding oil duct one and oil duct two respectively, described Pressure limiting elastic slice one and pressure limiting elastic slice two are separately mounted in mounting groove one and mounting groove two.

5. brake system of car special piston accumulator according to claim 4, it is characterised in that: when one He of pressure limiting elastic slice When pressure limiting elastic slice two is located in mounting groove one and mounting groove two, the lateral surface of pressure limiting elastic slice one and pressure limiting elastic slice two respectively with Two end faces of piston.

6. brake system of car special piston accumulator according to claim 5, it is characterised in that: the seal groove one Oil Guide groove one and Oil Guide groove two are offered respectively with the bottom of seal groove two, and the width of the Oil Guide groove one is greater than oil The internal diameter in road one, the width of the Oil Guide groove two are greater than the internal diameter of oil duct two.

7. brake system of car special piston accumulator according to claim 6, it is characterised in that: the piston and cylinder body Between be also embedded with guide ring.

8. brake system of car special piston accumulator according to claim 7, it is characterised in that: the guide ring is one It is a.

9. brake system of car special piston accumulator according to claim 8, it is characterised in that: the guide ring is set to Between sealing ring one and oil groove.

10. brake system of car special piston accumulator according to claim 9, it is characterised in that: the cylinder body is right It answers and offers outage and mudhole on the inner wall of oil pocket.