CN203515995U - Double swing spherical surface piston type electric vacuum pump - Google Patents
Double swing spherical surface piston type electric vacuum pump Download PDFInfo
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- CN203515995U CN203515995U CN201320206553.3U CN201320206553U CN203515995U CN 203515995 U CN203515995 U CN 203515995U CN 201320206553 U CN201320206553 U CN 201320206553U CN 203515995 U CN203515995 U CN 203515995U
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Abstract
The utility model relates to a double swing spherical surface piston type electric vacuum pump for an automobile. The pump comprises a pump body, a motor, an eccentric shaft, two spherical surface pistons, two air inlet valves, a silencer and a gas-type fitting. The pump body utilizes a different structure made of aluminium alloy with cast moulding. The pump body comprises two cylinders separated by a proper distance. One ends of the outer side of the two cylinders are respectively provided with end covers for blocking the outer ends of the inner holes of the cylinders. The pump body is provided with a through hole. One ends of the inner side of the two cylinders are spaced with a proper distance. The eccentric shaft is provided with a balancing block. The silencer is provided with a non-return valve. The pump is simple in structure, good in airtightness, low in noise, low in shock, long in continuous operating time, and good in low temperature performance, and suitable for environment requirements and riding comfortable requirements in an automobile using process.
Description
Technical field
The present invention relates to a kind of electric vacuum pump for automobile, specifically a kind of two sphere piston type electric vacuum pump that waves.
Background technique
Automobile brake booster is used vacuum as its operation power source, generally by motor or vacuum pump (mechanical type or electrodynamic type), to it, provides vacuum source.At present electric vacuum pump for automobile mostly adopts vane pump, and it has complex structure, noise is large, continuous working period is short shortcoming.
The electric vacuum pump that waves piston structure has existed for many years on market, have simple in structure, the advantage such as with low cost, when its piston moves back and forth under the drive of eccentric shaft, also carry out the swing of several angle, distance between its surface and cylinder bore wall also changes with the angle swinging, and is furnished with flexible plunger ring on piston, leans on the variation of the amount of deformation of flexible plunger ring to keep the sealing of piston when piston swings.
Because traditional gap width waving between its piston face of piston structure and casing wall is that the angle swinging with piston changes, so the variation of the gap width of the amount of deformation that depends on piston ring of the sealing height between piston and cylinder wall while swinging with piston changes.The piston ring that flexible material is made is flexible decline under low temperature environment, the variation of gap width when its amount of deformation can not be swung with piston effectively changes, cause the sealability of piston to decline, thereby affect pump performance, and there is skew in its eccentric shaft center of rotation Yu Qi center of mass in the running, this skew can produce unbalancing value when running up, thereby cause in the running vibrations, affect the riding comfort of automobile.
In the development process of Vehicular electric vacuum pump, traditional swing piston type vacuum pump is proved to be in test the Environmental Conditions that is not suitable for automobile, particularly the sealability at low temperature environment lower piston ring declines, cause the ability vacuumizing of vacuum pump to decline, cannot meet the usage requirement of automobile under low temperature environment; Baffler is having easily water inlet under the environment of water, affects the reliability of vacuum pump, cannot meet automobile in the usage requirement having under the environment of water, and the vibrations of vacuum pump and noise are also larger in the running, affect the riding comfort of automobile.
Summary of the invention
The object of the invention is to provide that a kind of noise is little, to shake little, continuous working period long, simple in structure, good seal performance, cryogenic property is good, thus two sphere piston type electric vacuum pumps that wave that the environmental requirement in the time of adapting to automobile use and riding comfort require.
The object of the present invention is achieved like this: a kind of novel two sphere piston type electric vacuum pumps that wave, this vacuum pump comprises the pump housing, be arranged on the motor above the pump housing, be arranged on the eccentric shaft of pump body, two sphere pistons, two suction valves, be arranged on baffler and gas-tpe fitting below the pump housing, it is characterized in that: the described pump housing is adopt aluminium alloy compression casting moulding abnormally-structured, it comprises two cylinders that distance is suitable, the end cap of outer end of hole in one end, outside of two cylinders is respectively equipped with this cylinder of shutoff, the outer cylinder of this end cap is connected with the endoporus interference of garden cylinder, in the pump housing, have through hole, through hole communicates with the endoporus of two cylinders and the gas-tpe fitting mounting hole on surface, the inner chamber of described two cylinders is for being installed into air valve and with the cylinder barrel of the sphere piston of outlet valve, between one end, inner side of these two cylinder barrels, there is a suitable spacing, and be limited with a pump housing chamber communicating with the endoporus of these two cylinder barrels, one end of this pump housing chamber, as exhaust port, is provided with an equilibrium block on described eccentric shaft, be provided with one-way valve on baffler.
The present invention improves traditional piston structure that waves, and has the following advantages and good effect during use:
1, the surface of contact of the present invention between the piston only of hard and soft piston ring, adopts spheric structure in the outer rim of piston only head.
2,, because hard piston only of the present invention and soft piston loop contacts face outer rim are spherical, the gap between piston only head surface and casing wall is a steady state value when swinging.Therefore when piston swings, the shape variation of piston ring also keeps constant.Under low temperature environment, the shape variation of piston ring is no longer subject to the impact of piston ring material flexible variety, sealing while effectively having guaranteed piston movement, thus the cryogenic property of vacuum pump effectively improved, met requirement when automobile uses this electric vacuum pump under low temperature environment.Constant amount of deformation has also reduced the fluctuation of driving force in operation process effectively, makes motor operation more steady.Constant amount of deformation has also reduced the fatigue damage of piston ring effectively, has improved working life and the reliability of piston ring.
3, the present invention has increased one-way valve structures in baffler.One-way valve structures can be discharged smoothly from one-way valve air, water but can not enter relief opening from one-way valve, thereby eliminated the possibility of baffler place water inlet, improved the reliability of vacuum pump, met requirement when automobile uses this electric vacuum pump under having the environment of water.
4, the present invention has increased equilibrium block on eccentric shaft.The quality of equilibrium block can reduce the unbalancing value of the electronic rotatable parts by vacuum pump when High Rotation Speed effectively, thereby effectively reduce, shakes and reduces noise, the requirement to riding comfort when meeting automobile and using this electric vacuum pump.
5, two sphere pistons with outlet valve of the present invention are symmetric.During due to motion, by same eccentric shaft, drive, so moving direction is identical.Like this, while becoming large and air-breathing with regard to the air cavity that has formed a piston because of volume, the air cavity of another piston is because of the diminish working state of exhaust of volume, this makes pump, and duty ratio is even, continuous in the running, has improved the load condition of motor, has improved pumping efficiency.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the cut-away view of Fig. 1 of the present invention.
Fig. 3 is pump body structure schematic diagram of the present invention.
Fig. 4 is face cut-away view in Fig. 3 of the present invention.
Fig. 5 is the eccentric shaft structure schematic diagram of band equilibrium block of the present invention.
Fig. 6 is the sphere piston structural representation of band outlet valve of the present invention.
Fig. 7 is intaking valve structure schematic diagram of the present invention.
Fig. 8 is the muffler structure schematic diagram of band one-way valve of the present invention.
Embodiment
Shown in accompanying drawing 1,2, this pair wave sphere piston type electric vacuum pump comprise the pump housing 1, motor 2, with the eccentric shaft 3 of equilibrium block, two with the sphere piston 4 of outlet valve, two suction valves 5, with baffler 6 and the gas-tpe fitting 7 of one-way valve.
Shown in accompanying drawing 1,2,3,4, the described pump housing 1 is the different in nature structure that adopts aluminium alloy compression casting moulding, it comprises two cylinders 11 that distance is suitable, one end, outside at these two cylinders, the end cap 12 that is respectively equipped with outer end of hole in this cylinder of shutoff, the outer cylinder of this end cap 12 is connected with the endoporus interference of cylinder 11.In the pump housing, being provided with through hole 13 communicates with the above-mentioned endoporus of two cylinders 11 and the gas-tpe fitting mounting hole 14 on surface, one end of described gas-tpe fitting 7 is connected with 14 interference of gas-tpe fitting mounting hole, and the inner chamber of above-mentioned two cylinders 11 is for being installed into air valve 5 and with the cylinder barrel 15 of the sphere piston 4 of outlet valve.Between one end, inner side of these two cylinder barrels 15, there is a suitable spacing, and be limited with a pump housing chamber 16 communicating with the endoporus of these two cylinder barrels 15.One end of this pump housing chamber 16, as exhaust port, is provided with the described baffler 6 with one-way valve on its end face 18, and described motor 2 is installed on another end face 17 of this pump housing chamber 16.The described eccentric shaft 3 with equilibrium block is arranged in above-mentioned pump housing chamber 16 and is connected with output shaft 21 interference of described motor 2.Two described sphere pistons 4 with outlet valve form two groups with two described suction valves 5 in each mode that is made into mutually a group, and the two ends of the endoporus of two cylinder barrels 15 of the pump housing described in being arranged on respectively in symmetrical mode.Suction valve 5 is arranged in one end that the outside of cylinder barrel 15 communicates with cylinder 11 endoporus, its valve block can open one facing to inner hole of cylinder one side, and the outer cylinder on the valve seat of this suction valve 5 is connected with the endoporus interference of cylinder barrel 15.This suction valve 5 makes air enter the endoporus of cylinder barrel 15 from endoporus one side of cylinder 11, and can not enter from endoporus one side of cylinder barrel 15 endoporus of cylinder 11.With the sphere piston 4 of outlet valve, be arranged in one end that the inner side of cylinder barrel 15 communicates with pump housing chamber 16, its head is towards suction valve 5, and afterbody is towards pump housing chamber 16 and can in the endoporus of cylinder barrel 15, move.Piston ring 43 on this piston crown seals when piston 4 motion.Exhaust valve plate 44 on this piston crown makes air enter pump housing chamber 16 1 sides from cylinder 11 1 sides of the endoporus of cylinder barrel 15, and can not enter cylinder 11 1 sides from pump housing chamber 16 1 sides of the endoporus of cylinder barrel 15.Like this, between two groups of suction valves 5 and the head with the sphere piston 4 of outlet valve, form respectively sphere piston 4 motions of a volume outlet valve going along with and the air cavity 8 that changes.Afterbody with the sphere piston 4 of outlet valve is provided with bearing 46, by the endoporus of bearing 46, is connected with the eccentric shaft 3 with equilibrium block.Under the drive of the eccentric shaft 3 with equilibrium block that described two sphere pistons 4 with outlet valve drive at the output shaft 21 that is subject to described motor 2, the to-and-fro motion that work waves at a certain angle separately, moving direction is identical.The to-and-fro motion of the described sphere piston 4 with outlet valve has caused that the volume generating period of air cavity 8 changes.Air cavity 8 volumes become in large process, and the air pressure in this air cavity diminishes.With the exhaust valve plate 44 on the sphere piston 4 of outlet valve, close because of the pressure that the pressure in pump housing chamber 16 is greater than in air cavity 8, the air-intake valve plate 53 on the suction valve 5 of cylinder barrel 15 the other ends is opened because of the pressure that the pressure in air cavity 8 is less than in Brake booster active chamber.Like this, by gas-tpe fitting 7 air amount from Brake booster active chamber being connected with cylinder bore.In the process that air cavity 8 volumes diminish, it is large that the air pressure in this air cavity becomes.With the exhaust valve plate 44 on the sphere piston 4 of outlet valve, open because of the pressure that the pressure in pump housing chamber 16 is less than in air cavity 8, the air-intake valve plate 53 on the suction valve 5 of the cylinder barrel the other end is closed because of the pressure that the pressure in air cavity is greater than in Brake booster active chamber.Like this, just the air being drawn into from Brake booster active chamber in air cavity 8 is extruded in pump housing chamber 16 in air cavity 8.Now, air pressure in pump housing chamber 16 is greater than with the atmospheric pressure outside the baffler 6 of one-way valve, with the check valve sheet 63 on the baffler 6 of one-way valve, therefore open, the air of extracting out in Brake booster active chamber is just discharged to the pump housing by the baffler 6 with one-way valve.In this process, this pair waves the air of sphere piston type vacuum pump constantly reduce in the active chamber of Brake booster by the action of continuous high-speed circulating in, thereby forms vacuum in the active chamber of Brake booster.
Shown in accompanying drawing 1, described motor 2 is a direct current motor.This motor is fixed by screws on the end face 17 of the described pump housing.The output shaft 21 of this motor is connected with through hole 321 interference on eccentric disc on the eccentric shaft 3 with equilibrium block.
Shown in accompanying drawing 1,2,5, the described eccentric shaft 3 with equilibrium block is comprised of eccentric shaft body 31, eccentric disc 32 and equilibrium block 33 3 parts.Eccentric shaft body 31 is a stiff shaft.Eccentric disc 32 is one to be fan-shaped dish, which is provided with two through holes that spacing is suitable, one is the through hole 321 that is positioned at intermediate portion, and this through hole is connected with motor output shaft 21 interference, another is the through hole that is positioned at fan handle position, and this through hole is connected with one end interference of eccentric shaft body 31.The shape of equilibrium block 33 is identical with eccentric disc 32, which is provided with one and is positioned at the through hole at fan handle position and the other end interference of eccentric shaft body 31 is connected.The unbalancing value that equilibrium block 33 produces in the time of can eliminating most of rotatable parts High Rotation Speed by electric vacuum pump with the quality of the fan-shaped part of eccentric disc 31, thus reduce the vibrations while turning round and reduce noise.
Shown in accompanying drawing 6, the described sphere piston 4 with outlet valve is comprised of sphere piston body 41, piston cap 42, piston ring 43, exhaust valve plate 44, screw 45 and bearing 46 6 parts.Sphere piston body 41 use aluminum alloys are made, and the structure of the outward flange of its head and piston ring contacting point 411 is spherical shape, and this gap that makes between this piston only head surface and casing wall is a steady state value when swinging.Its head is also provided with piston ring installation base 412 and several vent 413 and the screw hole of piston cap is installed.The end face of its head and exhaust valve plate contacting point are designed to a conical surface 414, so that exhaust valve plate smooth opening.Its afterbody has bearings mounted hole 415, and bearing 46 is installed in this hole.The endoporus of this bearing is connected with the body of eccentric shaft with equilibrium block.Piston cap 42 use aluminum alloys are made, its end face is provided with several vents 421, it is in the face of the outside of the one side of piston ring 43 and exhaust valve plate 44, the protruding seal ring 422 that to be provided with one section be semicircle, during the assembling of sealing ring, contact with piston ring 43 and under the effect of screw, piston ring 43 compressed, to guarantee that two parts are in the sealing of contacting point.The outside of the vent 421 in the face of piston ring 43 and the one side of exhaust valve plate 44 be also provided with together with the section protruding seal ring 423 that is semicircle, while being in contact with it under the effect of exhaust valve plate 44 at pressure, the vent 421 in piston cap is just closed.Its center portion is also provided with installs the step 424 of exhaust valve plate and the mounting hole of screw 45.Piston cap 42 is fixed on the head of sphere piston body 41 by screw 45.Piston ring 43 is the bowl-type ring of the flexible material making that a use high-and low-temperature resistance and rub resistance coefficient are low, and this piston ring seals when piston movement.This piston ring center is provided with a positioning hole, and its periphery is bowl-shape ring 431.Between the end face of this piston ring piston ring installation base 412 on seal ring 423 and sphere piston body head 411 outside piston cap, its bowl-shape ring 431 wraps on the sphere 411 of spherical flange of spherical piston body head, and contacts with the inner hole wall of the cylinder barrel 15 of the pump housing when piston 4 motion.Exhaust valve plate 44 is the plate-like thin slice with holes that the elastic material of a use high-and low-temperature resistance is made.This exhaust valve plate is positioned on the step 424 that exhaust valve plate is installed in piston cap.This exhaust valve plate can only the vent 421 piston cap be pushed in the vent 413 that this exhaust valve plate enters piston crown air open, but can not enter in the vent 421 piston cap from the vent 413 of piston crown.
Shown in accompanying drawing 7, described suction valve 5 is comprised of valve seat 51, rivet 52 and air-intake valve plate 53 3 parts.Valve seat 51 is a dish, on its end face, be provided with several by the vent of circumferential arrangement 511, the inner side of vent be respectively provided with outside together with the section protruding seal ring 512 that is semicircle, be provided with in the central the hole of an installation rivet.While contacting with pair of seal rings 512 under the effect of air-intake valve plate 53 at pressure, valve seat upper vent hole 511 has just been closed.Rivet 52 is the axle with step and the conical surface, and its large end is designed to a conical surface 521 by a side of air-intake valve plate installation step, so that air-intake valve plate 53 smooth opening.Its small end is provided with and is installed into step 522 and the rivet head 523 of air valve plate and is riveted together by rivet head 523 and valve seat 51.Air-intake valve plate 53 is the plate-like thin slice with holes that the elastic material of a use high-and low-temperature resistance is made.Between two seal rings 512 and the step 522 on rivet of air-intake valve plate 53 on valve seat 51, this air-intake valve plate makes air can only the vent 511 from valve seat push this air-intake valve plate open and enters the conical surface 521 1 sides on rivet 52, and the cavity of the conical surface 521 1 sides that but can not be from rivet 52 enters the vent 511 on valve seat 51.During assembling, the outer cylinder 513 on valve seat 51 is connected with the endoporus interference of cylinder barrel 15 on the pump housing 1.
Shown in accompanying drawing 8, the described baffler 6 with one-way valve is comprised of upper shell 61, lower shell body 62, check valve sheet 63, baffler filler 64 and mounting screw 65 5 parts, and is fixed on the chamber end face 18 on the pump housing 1 by mounting screw 65.Between upper shell 61 and lower shell body 62, form a cavity 621, in-built noise reduction filler 64, lower shell body 62 is provided with check valve sheet 63 mounting holes 622 and a vent 623, and check valve sheet 63 is housed in this mounting hole.
When check valve sheet 63 be arranged on the check valve sheet mounting hole 622 of lower shell body 62 interior after, this hole is just closed.Check valve sheet 63 is the plate-like thin slice 631 that the elastic material of a use high-and low-temperature resistance is made, and its center portion is provided with a mounting handle 632, and is fixed in the one-way valve mounting hole 622 on lower shell body 62 by mounting handle 632.The thin slice 631 that this check valve sheet is pushed on this valve block air in can only the vent 622 from the lower shell body 62 of these check valve sheet mounting handle 632 1 sides open enters in the cavity on lower shell body 62, but can not enter from cavity one side of lower shell body 62 in the vent 622 lower shell body 62 of mounting handle 632 1 sides of this valve block.This unidirectional function of passing through, has guaranteed sealing when this electric vacuum pump is used under having the environment of water.Noise reduction filler 64 is made by the porous material of high-and low-temperature resistance, has good silencing function, the noise while effectively having subdued exhaust.
One end of described gas-tpe fitting 7 is connected with gas-tpe fitting hole 14 interference on the pump housing 1 and communicates with the endoporus of two cylinders 11 on the pump housing by the through hole 13 in the pump housing 1.The other end is connected with the active chamber of Brake booster by flexible pipe.
Claims (10)
1. one kind pair is waved sphere piston type electric vacuum pump, this vacuum pump comprises the pump housing (1), be arranged on the pump housing (1) motor (2) above, be arranged on the inner eccentric shaft (3) of the pump housing (1), two sphere pistons (4), two suction valves (5), be arranged on the pump housing (1) baffler (6) and gas-tpe fitting (7) below, it is characterized in that: the described pump housing (1) comprises two cylinders (11) with certain distance, the end cap (12) of outer end of hole in one end, outside of two cylinders (11) is respectively equipped with this cylinder of shutoff, the outer cylinder of this end cap (12) is connected with the endoporus interference of cylinder (11), in the pump housing (1), have through hole (13), through hole (13) communicates with the endoporus of two cylinders (11) and the gas-tpe fitting mounting hole (14) on surface, the inner chamber of described two cylinders (11) is for being installed into air valve (5) and with the cylinder barrel (15) of the sphere piston (4) of outlet valve, between one end, inner side of these two cylinder barrels (15), with a spacing, and be limited with a pump housing chamber (16) communicating with the endoporus of these two cylinder barrels (15), one end of this pump housing chamber (16), as exhaust port, is provided with an equilibrium block (33) on described eccentric shaft (3), baffler is provided with one-way valve on (6).
2. a kind of pair according to claim 1 is waved sphere piston type electric vacuum pumps, it is characterized in that: the eccentric shaft (3) of described band equilibrium block (33) is arranged in above-mentioned pump housing chamber (16) and is connected with output shaft (21) interference of described motor (2), described two sphere pistons with outlet valve (4) form two groups with two suction valves (5) in each mode that is made into mutually a group, and in symmetrical mode, are arranged on respectively the two ends of endoporus of two cylinder barrels (15) of the pump housing (1).
3. a kind of pair according to claim 1 is waved sphere piston type electric vacuum pumps, it is characterized in that: described suction valve (5) is arranged in one end that the outside of cylinder barrel (15) communicates with cylinder (11) endoporus, its valve block can open one facing to inner hole of cylinder one side, and the outer cylinder on the valve seat of this suction valve (5) is connected with the endoporus interference of cylinder barrel (15), this suction valve (5) makes air enter the endoporus of cylinder barrel (15) from endoporus one side of cylinder (11), and can not enter from endoporus one side of cylinder barrel (15) endoporus of cylinder (11).
4. a kind of pair according to claim 1 is waved sphere piston type electric vacuum pumps, it is characterized in that: the described sphere piston with outlet valve (4) is arranged in one end that the inner side of cylinder barrel (15) communicates with pump housing chamber (16), its head is towards suction valve (5), afterbody is towards pump housing chamber (16) and can in the endoporus of cylinder barrel (15), move, piston ring (43) on this sphere piston (4) head seals when sphere piston (4) moves, exhaust valve plate (44) on sphere piston (4) head makes air enter pump housing chamber (16) one sides from cylinder (11) one sides of the endoporus of cylinder barrel (15), and can not enter cylinder (11) one sides from pump housing chamber (16) one sides of the endoporus of cylinder barrel (15), like this, the air cavity (8) that forms respectively sphere piston (4) motion of a volume outlet valve going along with and change between two groups of suction valves (5) and the head with the sphere piston (4) of outlet valve, afterbody with the sphere piston (4) of outlet valve is provided with bearing (46), by the endoporus of bearing (46), be connected with the eccentric shaft (3) with equilibrium block.
5. a kind of pair according to claim 1 is waved sphere piston type electric vacuum pumps, it is characterized in that: described motor (2) is a direct current motor, it is upper that this motor (2) is fixed by screws in the end face (17) of the pump housing (1), and the output shaft (21) of this motor (2) is connected with through hole (321) interference on eccentric disc on the eccentric shaft (3) with equilibrium block.
6. a kind of pair according to claim 1 is waved sphere piston type electric vacuum pumps, it is characterized in that: described eccentric shaft (3) is by eccentric shaft body (31), eccentric disc (32) and equilibrium block (33) three parts form, eccentric shaft body (31) is a stiff shaft, eccentric disc (32) is one to be fan-shaped dish, which is provided with two through holes with spacing, one for being positioned at the through hole (321) of intermediate portion, this through hole is connected with motor output shaft (21) interference, another is the through hole that is positioned at fan handle position, this through hole is connected with one end interference of eccentric shaft body (31), the shape of equilibrium block (33) is identical with eccentric disc (32), which is provided with a through hole that is positioned at fan handle position is connected with the other end interference of eccentric shaft body (31).
7. a kind of pair according to claim 1 is waved sphere piston type electric vacuum pumps, it is characterized in that: the described sphere piston with outlet valve (4) is by sphere piston body (41), piston cap (42), piston ring (43), exhaust valve plate (44), screw (45) and bearing (46) six parts form, sphere piston body (41) is made with aluminum alloy, the structure of the outward flange of its head and piston ring contacting point (411) is spherical shape, this gap that makes between this piston only head surface and casing wall is a steady state value when swinging, its head is also provided with piston ring installation base (412) and several vent (413) and the screw hole of piston cap is installed, the end face of its head and exhaust valve plate contacting point are designed to a conical surface (414), so that exhaust valve plate smooth opening, its afterbody has bearings mounted hole (415), bearing (46) is installed in this hole, the endoporus of this bearing is connected with the body of eccentric shaft with equilibrium block.
8. a kind of pair according to claim 7 is waved sphere piston type electric vacuum pump, it is characterized in that:
A, described piston cap (42) are made with aluminum alloy, its end face is provided with several vents (421), it is in the face of the outside of the one side of piston ring (43) and exhaust valve plate (44), the protruding seal ring (422) that to be provided with one section be semicircle, during the assembling of sealing ring, contact with piston ring (43) and under the effect of screw, piston ring (43) compressed, to guarantee that two parts are in the sealing of contacting point; Also the protruding seal ring (423) that to be provided with one section be semicircle in the outside of the vent (421) of the one side in the face of piston ring (43) and exhaust valve plate (44), while being in contact with it under the effect of exhaust valve plate (44) at pressure, the vent in piston cap (421) is just closed; Its center portion is also provided with installs the step (424) of exhaust valve plate and the mounting hole of screw (45), and piston cap (42) is fixed on the head of sphere piston body (41) by screw (45);
B, described piston ring (43) is one to use resistance to height, the bowl-type ring that the flexible material that low temperature and rub resistance coefficient are low is made, this piston ring seals when piston movement, this piston ring center is provided with a positioning hole, its periphery is bowl-shape ring (431), this piston ring is positioned between the end face of the piston ring installation base (412) on seal ring (423) and sphere piston body head (411) outside piston cap, its bowl-shape ring (431) wraps on the sphere (411) of spherical flange of spherical piston body head, and when moving, piston (4) contacts with the inner hole wall of the cylinder barrel (15) of the pump housing,
C, described exhaust valve plate (44) are the plate-like thin slice with holes that the elastic material of a use high-and low-temperature resistance is made, this exhaust valve plate is positioned on the step (424) that exhaust valve plate is installed in piston cap, this exhaust valve plate can only the vent (421) piston cap be pushed in the vent (413) that this exhaust valve plate enters piston crown air open, but can not enter in the vent (421) piston cap from the vent (413) of piston crown.
9. a kind of pair according to claim 1 is waved sphere piston type electric vacuum pumps, it is characterized in that: described suction valve (5) is by valve seat (51), rivet (52) and air-intake valve plate (53) three parts form, valve seat (51) is a dish, on its end face, be provided with several by the vent of circumferential arrangement (511), the inner side of vent be respectively provided with outside together with the section protruding seal ring (512) that is semicircle, be provided with in the central the hole of an installation rivet, while contacting with pair of seal rings (512) under the effect of air-intake valve plate (53) at pressure, valve seat upper vent hole (511) is just closed, rivet (52) is the axle with step and the conical surface, its large end is designed to a conical surface (521) by a side of air-intake valve plate installation step, so that air-intake valve plate (53) smooth opening, its small end is provided with and is installed into step (522) and the rivet head (523) of air valve plate and is riveted together by rivet head (523) and valve seat (51), air-intake valve plate (53) is one to use resistance to height, the plate-like thin slice with holes that the elastic material of low temperature is made, air-intake valve plate (53) is positioned between two seal rings (512) and the step (522) on rivet on valve seat (51), this air-intake valve plate makes air can only the vent (511) from valve seat push this air-intake valve plate open and enters the conical surface (521) one sides on rivet (52), the cavity of the conical surface (521) one sides that but can not be from rivet (52) enters the vent (511) on valve seat (51), during assembling, outer cylinder (513) on valve seat (51) is connected with the endoporus interference of cylinder barrel (15) on the pump housing (1).
10. a kind of pair according to claim 1 is waved sphere piston type electric vacuum pump, it is characterized in that:
A, the described baffler with one-way valve (6) are comprised of upper shell (61), lower shell body (62), check valve sheet (63), noise reduction filler (64) and mounting screw (65) five parts, and be fixed on the chamber end face (18) on the pump housing (1) by mounting screw (65), between upper shell (61) and lower shell body (62), form a cavity (621), in-built noise reduction filler (64), lower shell body (62) is provided with a check valve sheet (63) mounting hole (622) and vent (623), and check valve sheet (63) is housed in this mounting hole;
B, described check valve sheet (63) is one to use resistance to height, the plate-like thin slice (631) that the elastic material of low temperature is made, its center portion is provided with a mounting handle (632), and be fixed in the one-way valve mounting hole (622) on lower shell body (62) by mounting handle (632), the thin slice (631) that this check valve sheet is pushed on this valve block air in can only the vent (622) from the lower shell body (62) of these check valve sheet mounting handle (632) one sides open enters in the cavity on lower shell body (62), but can not enter from cavity one side of lower shell body (62) in the vent (622) the lower shell body (62) of mounting handle (632) one sides of this valve block,
One end of c, described gas-tpe fitting (7) is connected with gas-tpe fitting hole (14) interference on the pump housing (1) and passes through through hole (13) in the pump housing (1) and communicates with the endoporus of two cylinders (11) on the pump housing, and the other end is connected with the active chamber of Brake booster by flexible pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320206553.3U CN203515995U (en) | 2013-04-23 | 2013-04-23 | Double swing spherical surface piston type electric vacuum pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320206553.3U CN203515995U (en) | 2013-04-23 | 2013-04-23 | Double swing spherical surface piston type electric vacuum pump |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121160A (en) * | 2013-04-23 | 2014-10-29 | 上海旭岛汽车零部件有限公司 | Electric vacuum pump with two swinging spherical pistons |
| CN105804967A (en) * | 2016-05-10 | 2016-07-27 | 浙江亚太机电股份有限公司 | Combined piston type electronic vacuum pump for automobile |
| CN106224201A (en) * | 2016-08-31 | 2016-12-14 | 温州品达机车部件有限公司 | Vacuum pump of electric automobile |
| CN111197568A (en) * | 2018-11-20 | 2020-05-26 | 娄施玉 | Miniature reciprocating oil-free vacuum pump |
| CN114962212A (en) * | 2022-07-28 | 2022-08-30 | 杭州银轩机械有限公司 | Double-piston type new energy automobile vacuum pump |
-
2013
- 2013-04-23 CN CN201320206553.3U patent/CN203515995U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121160A (en) * | 2013-04-23 | 2014-10-29 | 上海旭岛汽车零部件有限公司 | Electric vacuum pump with two swinging spherical pistons |
| CN104121160B (en) * | 2013-04-23 | 2016-12-28 | 上海旭岛汽车零部件有限公司 | Double wave sphere piston type electric vacuum pump |
| CN105804967A (en) * | 2016-05-10 | 2016-07-27 | 浙江亚太机电股份有限公司 | Combined piston type electronic vacuum pump for automobile |
| CN106224201A (en) * | 2016-08-31 | 2016-12-14 | 温州品达机车部件有限公司 | Vacuum pump of electric automobile |
| CN111197568A (en) * | 2018-11-20 | 2020-05-26 | 娄施玉 | Miniature reciprocating oil-free vacuum pump |
| CN114962212A (en) * | 2022-07-28 | 2022-08-30 | 杭州银轩机械有限公司 | Double-piston type new energy automobile vacuum pump |
| CN114962212B (en) * | 2022-07-28 | 2022-10-25 | 杭州银轩机械有限公司 | Double-piston type new energy automobile vacuum pump |
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