CN212803537U - Double-diaphragm vacuum pump for vehicle - Google Patents

Abstract

The utility model discloses a double-diaphragm vacuum pump for vehicles, through redesigning air inlet thinking and air inlet structure, make air inlet channel can realize complete air inlet channel after valve gap, valve plate and special-shaped sealing washer are assembled, this structure and realize air inlet channel alone in the valve gap, the structure is tighter, the volume is smaller, intensity is bigger, simultaneously, open shape structure should be superior to non-open shape structure in processing, thus process and develop the mould more easily; through the structural design, one-line design can be realized in an effective space, and the defect that the volume of a closed air inlet channel in the prior art is increased if one designed air inlet channel is adopted is avoided; through the design and the design of the special-shaped sealing ring supporting platform, the special-shaped sealing ring is basically on the same plane when being manufactured and used, so that the bending loss and deformation in the installation process are reduced, and the service life is prolonged.

Description

Double-diaphragm vacuum pump for vehicle

Technical Field

The utility model relates to a vacuum pump technical field for the vehicle, concretely relates to automobile-used double diaphragm vacuum pump.

Background

At present, automobile-used electric vacuum pump mainly has piston vacuum pump, rotary-vane vacuum pump and diaphragm formula vacuum pump, and in use, people find diaphragm formula vacuum pump to be better than other two kinds of vacuum pumps far away in reliability and performance effect, but because traditional vacuum pump is bulky, the limitation in space often leads to the installation to use the difficulty on the car. Chinese patent documents CN105889041A, CN105952624A, and CN15889042A disclose a diaphragm type electric vacuum pump for an automobile and parts, which includes a pump body and a motor, wherein an air inlet and outlet channel is provided on the pump body, an air suction cavity and an air exhaust cavity of an end cover assembly are provided at the left and right ends of the pump body, the air outlet end cover assembly includes an end cover and a shield, the end cover and the shield form a primary buffer cavity and a secondary buffer cavity, an end cover check valve is provided in the primary buffer cavity, an acoustic sponge is provided in the secondary buffer cavity, and air is exhausted from the air outlet via the stretched air inlet and outlet channel. Above-mentioned vacuum pump has advantages such as small, but controls end cover subassembly and curb plate structure comparatively complicated, and processing, equipment are all comparatively complicated, and is main, and it is poor to seal the effect between curb plate and the end cover, influences the air exhaust performance. In order to solve the technical problem, chinese patent document CN207033698U discloses an electric membrane vacuum pump for vehicles, which comprises a motor, a crankcase, a valve cover, a valve plate, a connecting rod, a muffler and an air suction joint, wherein the motor directly drives an eccentric shaft; the valve cover, the valve plate and the connecting rod are symmetrically distributed at the left and right sides, the end part of the connecting rod is provided with a membrane, a special-shaped sealing ring is arranged between the valve cover and the valve plate, and the special-shaped sealing ring is arranged to play a role in sealing between the valve cover and the valve plate, so that air leakage is reduced in the air exhaust process, and the air exhaust efficiency is improved. Although the structure has a certain technical effect, research and development personnel think that the structure of the vacuum pump still has great technical improvement.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a double-diaphragm vacuum pump for a vehicle, which comprises a crankcase, wherein the crankcase is provided with a driving assembly, a noise elimination and exhaust assembly, a diaphragm and two groups of end cover assemblies; each end cover assembly comprises a valve cover, a valve plate and a special-shaped sealing ring arranged between the valve cover and the valve plate; the valve cover comprises a valve cover main body and an air inlet baffle plate, the valve cover main body is arranged on the valve plate or the crankcase and comprises an air inlet groove and an air outlet groove, an air inlet inclined plane is formed at one position of the side wall of the air inlet groove, a baffle plate through hole is formed in the air inlet baffle plate, when the air inlet baffle plate covers the air inlet groove, the air inlet inclined plane and the side edge of the air inlet baffle plate form a valve cover air inlet, and an air outlet inclined plane is formed at one side of the side wall of the air outlet groove; the valve plate comprises an installation part fixedly installed with the crankcase and an arc-shaped structure formed in the installation part, the installation part is used for installing the valve plate on the crankcase, a first valve plate air inlet and a second valve plate air outlet are formed in the installation part, the arc-shaped structure comprises an inner concave surface and an outer convex surface, a special-shaped sealing ring supporting platform is formed on the outer convex surface, the special-shaped sealing ring supporting platform is formed by bestriding and attaching the outer convex surface, an air inlet through groove and an air outlet through groove are formed in the special-shaped sealing ring supporting platform, the first valve plate air inlet is communicated with the air inlet through groove, the second valve plate air outlet is communicated with the air exhaust through groove, and a second valve plate air inlet and a first; the air inlet of the first valve plate is communicated with the air inlet on the crankcase, the air outlet of the second valve plate is communicated with the air outlet on the crankcase, and the air outlet is communicated with the inner cavity of the crankcase through an air outlet pipeline; the special-shaped sealing ring comprises an air inlet sealing ring and an air outlet sealing ring, when the special-shaped sealing ring is installed, the air inlet sealing ring is used for enclosing the air inlet through groove, the air inlet of the second valve plate, the baffle through hole, the air inlet groove and the air inlet of the valve cover, and the air outlet sealing ring is used for enclosing the air outlet through groove, the air outlet of the first valve plate, the air outlet groove and the air outlet inclined plane; an inner sealing ring is formed in the air inlet sealing ring, during installation, the inner sealing ring is used for surrounding the baffle through hole and the second valve plate air inlet, an air inlet diaphragm is connected in the inner sealing ring, the air inlet diaphragm is matched with the baffle through hole to realize an air inlet process, an air outlet diaphragm is connected in the air outlet sealing ring, and the air outlet diaphragm is matched with the first valve plate air outlet to realize an air outlet process.

Further, an air inlet groove clamping structure is arranged on one end face of the air inlet baffle, and the air inlet groove clamping structure is matched with the inner wall of the air inlet groove during installation.

Furthermore, the periphery of the air inlet groove forms a supporting groove, and the air inlet baffle is clamped with the supporting groove when being installed.

Further, the support groove side wall forms a groove projection.

Furthermore, the other end face of the air inlet baffle forms an air inlet diaphragm limiting structure which is matched with an air inlet diaphragm empty groove between the air inlet diaphragm and the inner sealing ring.

Further, the air inlet diaphragm limiting structure is a semi-surrounding structure.

Furthermore, a semi-surrounding connecting structure is arranged between the inner sealing ring and the air inlet sealing ring.

Furthermore, a U-shaped connecting structure is arranged between the inner sealing ring and the air inlet sealing ring.

Further, the air outlet groove is an inclined groove.

Further, a yielding groove is formed in the air outlet groove; a reinforcing structure is formed on the air outlet membrane; when the structure is installed, the reinforcing structure is overlapped with the receding groove part.

Furthermore, a limiting block is formed on the air outlet diaphragm and is abutted to the air outlet groove.

Furthermore, the air outlet membrane is connected with the air outlet sealing ring in three positions.

Further, an air outlet diaphragm empty groove is formed between the air outlet diaphragm and the air outlet sealing ring, an air outlet diaphragm limiting structure is formed on the valve cover main body, and during installation, the air outlet diaphragm limiting structure extends into the air outlet diaphragm empty groove.

Further, the valve gap upper main part forms special-shaped sealing ring mounting groove.

Furthermore, an air inlet diaphragm limiting boss is formed at the air inlet of the second valve plate and used for limiting the air inlet diaphragm, and the inner sealing ring encloses the air inlet diaphragm limiting boss.

Furthermore, a boss inclined plane is formed on the air inlet diaphragm limiting boss.

Further, the air outlet of the first valve plate is an annular boss air outlet.

Furthermore, reinforcing ribs are respectively formed on two sides of the valve cover main body, and free ends of the reinforcing ribs are arranged on the valve plate or the crankcase.

Further, the valve plate be formed with valve plate mounting hole on the installation department, be formed with valve cover mounting hole on the valve cover mainboard, be formed with the strengthening rib mounting hole on the strengthening rib, be formed with the screw thread mounting hole on the crankcase, the valve cover mounting hole with the strengthening rib mounting hole with valve plate mounting hole looks adaptation, and will through the bolt the valve cover with the valve plate is installed on the crankcase.

Further, a first positioning pin structure is formed between the valve cover and the valve plate; and a second positioning pin structure is formed between the valve plate and the crankcase.

Further, the side of dysmorphism sealing washer mounting groove is including forming outside limit, the piece of admitting air and the piece of giving vent to anger in the valve gap main part, the piece of admitting air with admit air logical groove looks adaptation, go out the gas piece with logical groove looks adaptation gives vent to anger, admit air the inclined plane and extend to the piece of admitting air, the inclined plane of giving vent to anger extends to the piece of giving vent to anger.

Further, the air inlet sealing ring and the air outlet sealing ring are integrally formed. After the integrated molding, the shared structure can be combined into a single structure.

Furthermore, the shapes of the air inlet sealing ring and the air outlet sealing ring are the same.

Further, the air inlet of the crankcase is connected with the air inlet joint through the air inlet pipeline.

Further, an air inlet sealing ring groove and an air outlet sealing ring groove are formed in the air inlet and the air outlet of the crankcase respectively, and an air inlet sealing ring and an air outlet sealing ring are mounted in the air inlet sealing ring groove and the air outlet sealing ring groove respectively during mounting.

Further, two sets of end cover components are symmetrically installed. The crankcase is further provided with a first cylindrical mounting hole and a second cylindrical mounting hole.

Compared with the prior art, the technical scheme of the utility model have following advantage:

(1) the utility model discloses a vehicle double diaphragm vacuum pump, through redesign air inlet thinking and inlet structure, make inlet channel after valve gap, valve plate and special-shaped sealing washer assemble, can realize complete inlet channel, this structure and realize inlet channel alone in the valve gap, the structure is inseparabler, the volume is littleer, intensity is bigger, simultaneously, open shape structure should be superior to non-open shape structure in processing to it is easier to process and develop the mould; through the structural design, one-line design can be realized in an effective space, and the defect that the volume of a closed air inlet channel in the prior art is increased if one designed air inlet channel is adopted is avoided; through the design and the design of the special-shaped sealing ring supporting platform, the special-shaped sealing ring is basically on the same plane when being manufactured and used, so that the bending loss and deformation in the installation process are reduced, and the service life is prolonged; furthermore, the air inlet sealing ring and the air outlet sealing ring are separately designed, so that the possibility of air mixing is reduced; the design of the positioning holes on the air inlet and outlet diaphragm is removed, so that the problem of inaccurate positioning caused by a small amount of deformation of the air inlet and outlet diaphragm is solved; the air inlet diaphragm is positioned in a semi-surrounding mode, so that the positioning structure of the air inlet diaphragm is enlarged, and the problem of inaccurate positioning is further reduced; further, through this innovation, the inlet channel is horizontal setting basically, compares in the current oblique angle design of admitting air and has reduced the damping structure, and gaseous smooth transition has avoided extra gas to make an uproar.

(2) The utility model discloses a vehicle double-diaphragm vacuum pump, through setting up air inlet groove block structure and support groove, make air inlet baffle and the air inlet groove cooperation more adaptation; furthermore, a groove bulge is formed on the inner wall of the support groove and is extruded with the side wall of the air inlet baffle plate, so that the air inlet baffle plate is more firmly installed; meanwhile, the other end face of the air inlet baffle forms an air inlet diaphragm limiting structure which is a semi-surrounding structure, so that the limiting process and the limiting structure are easier to realize and are not deformed.

(3) The utility model discloses an automobile-used biplate vacuum pump, the inner seal circle with be U type connection structure between the sealing washer admits air for connection between the two is more firm, including in the sealing washer use, reduces deformation and dragging between the two, and then realizes longer life on the plane seal face.

(4) The utility model discloses a vehicle double-diaphragm vacuum pump, through the recess of stepping down and the position of additional strengthening stepping down, after increasing the intensity of the diaphragm of giving vent to anger, can realize the quick home position; the vent membrane is partially opened through the vent membrane limiting block which is abutted against the vent groove, so that the opening pressure is reduced; furthermore, the air outlet diaphragm is connected with the three positions of the air outlet sealing ring, so that the air outlet diaphragm is partially opened, one corner of the opening pressure is reduced, the opening pressure is further reduced, an air outlet diaphragm empty groove is formed between the air outlet diaphragm and the air outlet sealing ring, an air outlet diaphragm limiting structure is formed on the valve cover, and during installation, the air outlet diaphragm limiting structure extends into the air outlet diaphragm empty groove, and the deformation of the air outlet diaphragm is further reduced.

(5) The utility model discloses a vehicle double-diaphragm vacuum pump, second valve plate air inlet department is formed with the spacing boss of air inlet diaphragm, is used for to the air inlet diaphragm is spacing, the internal seal circle encloses the spacing boss of air inlet diaphragm, avoids air inlet diaphragm and supporting platform to take place to glue and even, guarantees that the air current is usually, through increasing the boss inclined plane, guarantees that the air current is smooth to pass through; first valve plate gas outlet is annular boss gas outlet, can realize that the structure of this diaphragm both ends face of giving vent to anger is close or the contact diaphragm of giving vent to anger, makes the diaphragm of giving vent to anger stable, reduces to warp by a wide margin, has both guaranteed the leakproofness, can avoid again gluing even, can also increase of service life.

(6) The utility model discloses a double-diaphragm vacuum pump for vehicle, valve gap can increase valve gap intensity by setting up the strengthening rib; by forming the special-shaped sealing ring mounting groove, stable and quick mounting is realized; the smooth transition of the airflow is ensured by the inclined plane extension on the air inlet block and the air outlet block.

(7) The utility model discloses a vehicle double-diaphragm vacuum pump, through with special-shaped seal circle integrated into one piece, simple to operate avoids the installation mistake; furthermore, through size difference, quick installation and separation are further realized.

(8) The utility model discloses an automobile-used double diaphragm vacuum pump, two sets of end cover subassembly symmetry installations, pleasing to the eye and compact structure reduce the structure grow of dislocation installation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a dual-diaphragm vacuum pump for a vehicle according to the present invention;

FIG. 2 is a first schematic structural view of the vehicular dual-diaphragm vacuum pump of the present invention;

FIG. 3 is a schematic structural view of a dual-diaphragm vacuum pump for a vehicle according to the present invention;

fig. 4 is a third schematic structural view of the vehicular double-diaphragm vacuum pump of the present invention;

fig. 5 is a first schematic structural diagram of a crankcase of the present invention;

fig. 6 is a schematic structural view ii of the crankcase according to the present invention;

fig. 7 is a first schematic structural diagram of a valve cover main body according to the present invention;

fig. 8 is a second schematic structural view of the valve cover main body of the present invention;

fig. 9 is a schematic structural view of the air intake baffle of the present invention;

FIG. 10 is a first schematic structural view of a valve plate according to the present invention;

FIG. 11 is a second schematic structural view of the valve plate of the present invention;

fig. 12 is a first schematic structural diagram of the special-shaped sealing ring of the present invention;

fig. 13 is a schematic structural diagram of a special-shaped seal ring of the present invention;

the reference numbers in the figures denote: 1-a crankcase; 2-a muffling exhaust assembly; 3-a membrane; 4-valve cover; 5-a valve plate; 6-special-shaped sealing rings; 7-a valve cover body; 8-an air intake baffle; 9-an air inlet groove and 10-an air outlet groove; 11-air intake ramp; 12-baffle through holes; 13-air outlet inclined plane; 14-a mounting portion; 15-arc structure; 16-a first valve plate inlet port; 17-second valve plate outlet; 18-an inner concave surface; 19-outer convex surface; 20-a special-shaped sealing ring supporting platform; 21-air inlet through groove; 22-air outlet through grooves; 23-second valve plate air inlet; 24-first valve plate outlet; 25-an air outlet pipeline; 26-an air inlet sealing ring; 27-air outlet sealing ring; 28-inner sealing ring; 29-an air intake membrane; 30-air outlet membrane; 31-an air inlet groove clamping structure; 32-a support groove; 34-air inlet membrane empty groove; 35-abdicating the groove; 36-a reinforcing structure; 37-a limiting block; 38-air outlet membrane empty groove; 39-limiting structure of the air outlet diaphragm; 40-a special-shaped sealing ring mounting groove; 41-air inlet diaphragm limit boss; 42-boss ramp; 43-reinforcing ribs; 44-valve plate mounting holes; 45-valve cover mounting holes; 46-reinforcing rib mounting holes; 47-threaded mounting holes; 48-a first locator pin; 49-first dowel hole; 50-a second locating pin; 51-a second dowel hole; 52-outer side; 53-air inlet block; 54-air outlet block; 55-an air inlet duct; 56-air inlet connection; 57-air inlet seal ring groove; 58-outlet seal ring groove; 59-a first cylindrical mounting hole; 60-second cylindrical mounting holes; 61-an air inlet; 62-air outlet; 63-preparing a hole in advance; 64-a motor; 65-deep groove bearings; 66-connecting rod; 67-eccentric shaft; 68-inlet of the inlet passage; 69-air inlet fitting mounting holes; 70-muffler mounting port; 71-muffler mounting holes; 72-membrane positioning ring groove; 73-motor mounting port; 74-motor seal groove; 75-motor mounting holes; 76-groove relief; 77-arc reinforcement.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. The embodiments in the present invention, other embodiments obtained by a person of ordinary skill in the art without creative work, all belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 13, the present embodiment discloses a dual-diaphragm vacuum pump for a vehicle, which includes a crankcase 1, and the crankcase 1 is mounted with a driving assembly, a sound-damping exhaust assembly 2, a diaphragm 3 and two sets of end cover assemblies.

The driving assembly comprises a motor 64, an eccentric shaft 67, a connecting rod 66 and a deep groove bearing 65, wherein the motor 64 is installed on a motor installation opening 73 through a motor installation hole 75 by using a bolt, and a sealing ring is used for sealing in a motor sealing groove 74; the output end of the motor 64 is connected with an eccentric shaft 67, the eccentric shaft 67 is provided with a deep groove bearing 65, a connecting rod 66 is arranged outside the deep groove bearing 65, one end of the connecting rod 66 is connected with the diaphragm 3, and the diaphragm 3 is arranged in a diaphragm positioning annular groove 72 of the crankcase 1; the muffling exhaust assembly 2 includes a muffler mounted in a muffler mounting opening 70 through a muffler mounting hole 71. The above structure is a type of structure commonly found in diaphragm vacuum pumps and will not be described in detail here.

The crankcase 1 is also provided with two groups of end cover assemblies which can be symmetrically installed and can be installed in a staggered mode, and in spite of the mode, the two groups of end cover assemblies can be unchanged, but the structures of the two groups of end cover assemblies are symmetrically arranged and are only arranged on the air inlet pipeline 55 and the air outlet pipeline 25 of the crankcase 1 in a position adjusting mode respectively, the air inlet pipeline 55 is communicated with the air inlet 61, the structures of the air inlet pipeline 55 and the air outlet pipeline can be independently arranged, and the air inlet pipeline and the air outlet pipeline can be integrally formed with the crankcase 1. In this embodiment, for the sake of structural compactness, it is preferable that the air intake duct 55 is symmetrically installed, and the corresponding two air intake ducts 55 share one air intake joint 56, and the air intake joint 56 is installed on the air intake passage inlet 68 through an air intake joint installation hole 69.

Each end cover assembly comprises a valve cover 4, a valve plate 5 and a special-shaped sealing ring 6 arranged between the valve cover 4 and the valve plate 5; the valve cover 4 comprises a valve cover main body 7 and an air inlet baffle plate 8, the valve cover main body 7 is in a long strip shape and comprises an air inlet groove 9 and an air outlet groove 10, the shape of the air inlet groove 9 is not specifically limited, a square structure is preferred, meanwhile, an air inlet inclined plane 11 is formed on one side wall of the air inlet groove 9, a baffle through hole 12 is formed on the air inlet baffle plate 8, the shape and the number of the baffle through holes 12 are not specifically limited, in the embodiment, the baffle through holes 12 are two long strip-shaped holes, two holes are arranged in a splayed shape, and are communicated with each other through grooves, when the air inlet baffle plate 8 covers the air inlet groove 9, the air inlet inclined plane 11 and one side edge of the air inlet baffle plate 8 form a valve cover air inlet, further, one end face of the air inlet baffle plate 8 is provided with an air inlet groove clamping structure 31, when the valve, the air inlet groove clamping structure 31 is matched with the inner wall of the air inlet groove 31, specifically, the air inlet groove clamping structure 31 and the air inlet groove 31 can be clamped, the structure of the air inlet groove clamping structure 31 is not specifically limited, in this embodiment, the air inlet groove clamping structure 31 is a U-shaped structure, in order to increase the strength, the bent part of the U-shaped structure can be thickened, in order to make the installation of the air inlet baffle plate 8 more stable and the valve cover main body 7 more adaptive, a supporting groove 32 is formed at the periphery of the air inlet groove 9, the air inlet baffle plate 8 is clamped with the supporting groove 9 when being installed, preferably just embedded, in order to further fix the air inlet baffle plate 8, a groove bulge 76 is formed on the side wall of the supporting groove 9, the shape and the structure of the groove bulge are not specifically limited, and the; the structure of the air outlet groove 10 is not particularly limited, such as a tetragonal structure, further, the air outlet groove 10 is a groove with an inclined bottom surface, and an air outlet inclined surface 13 is formed on the air outlet groove 10; the inclination of the air inlet inclined plane 11 and the air outlet inclined plane 13 is not unique, and the inclination is adjusted according to the whole valve cover main body 7, so that a single inclination inclined plane can be selected, and a plurality of sections of inclination inclined planes can be selected; the valve plate 15 includes an installation part 14 fixed to the crankcase 1 and an arc-shaped structure 15 formed in the installation part 14, the installation part 14 installs the valve plate 5 on the crankcase 1, the shape of the installation part is not particularly limited, the installation part is generally set according to the installation end surface of the crankcase 1, a first valve plate air inlet 16 and a second valve plate air outlet 17 are formed on the installation part 14, the arc-shaped structure 15 and the diaphragm 3 form a working cavity of a vacuum pump, the working cavity includes an inner concave surface 18 and an outer convex surface 19, a special-shaped sealing ring supporting platform 20 is formed on the outer convex surface 19, meanwhile, the special-shaped sealing ring supporting platform is matched with the valve cover, the surface of the supporting platform is a plane, the supporting platform is attached to the outer convex surface 19 in a straddling manner, the shape of the supporting platform is matched with the shape of the valve cover, in order to increase the strength of the arc-shaped structure, the extensions of two, an air inlet through groove 21 and an air outlet through groove 22 are further formed on the valve plate, the first valve plate air inlet 16 is communicated with the air inlet through groove 21, the second valve plate air outlet 17 is communicated with the air outlet through groove 22, a second valve plate air inlet 23 and a first valve plate air outlet 24 are further formed on the valve plate 5, the first valve plate air inlet 16 is communicated with an air inlet 61 on the crankcase 1, the second valve plate air outlet 17 is communicated with an air outlet 62 on the crankcase 1, and the air outlet 62 is communicated with the inner cavity of the crankcase 1 through an air outlet pipeline 25; the special-shaped sealing ring 6 comprises an air inlet sealing ring 26 and an air outlet sealing ring 27, when the special-shaped sealing ring is installed, the air inlet sealing ring 26 is used for enclosing the air inlet through groove 21, the second valve plate air inlet 23, the baffle through hole 12, the air inlet groove 9 and the valve cover air inlet, and the air outlet sealing ring 27 is used for enclosing the air outlet through groove 22, the first valve plate air outlet 24, the air outlet groove 10 and the air outlet inclined plane 13; an inner sealing ring 28 is formed in the air inlet sealing ring 26, when the inner sealing ring 28 is installed, the inner sealing ring 28 is used for enclosing the baffle through hole 12 and the second valve plate air inlet 23, and the shape of the inner sealing ring 28 is not particularly limited, and is preferably quadrangular; interior sealing washer 28 in-connection has air inlet diaphragm 29, air inlet diaphragm 29 with baffle through-hole 12 cooperatees and realizes the process of admitting air, the sealing washer 27 in-connection of giving vent to anger has the diaphragm 30 of giving vent to anger, give vent to anger the diaphragm 30 with first valve plate gas outlet 24 cooperatees and realizes the process of giving vent to anger.

Further, the other end surface of the intake baffle 12 forms an intake diaphragm limiting structure (not shown in the figure) which is matched with the intake diaphragm empty groove 34 between the intake diaphragm 29 and the inner sealing ring 28, preferably, the intake diaphragm limiting structure is a semi-surrounding structure, in this embodiment, the intake diaphragm limiting structure is a U-shaped structure, and at a specific point, the intake diaphragm limiting structure is symmetrical to the intake groove clamping structure; the inlet diaphragm recess 34 is preferably U-shaped.

Further, a semi-surrounding connection structure, in this embodiment, a U-shaped connection structure, is provided between the inner seal ring 28 and the intake seal ring 26.

Further, a yielding groove 35 is formed on the air outlet groove 10; a reinforcing structure 36 is formed on the air outlet membrane; during the installation, additional strengthening 36 with recess 35 part overlaps of stepping down forms local stepping down, recess 35 of stepping down with additional strengthening 36's structure does not do specifically and restricts, in this embodiment, recess 35 of stepping down is the sphere arc recess, additional strengthening 36 sphere arc is protruding.

Further, form stopper 37 on the diaphragm 30 of giving vent to anger, stopper 37 with it is inconsistent to give vent to anger recess 10, stopper 37's structure does not do specific restriction, and preferred setting is in on a corner of the diaphragm 30 of giving vent to anger, form a curved protrusion with angle.

Further, the air outlet membrane 30 is connected with three positions of the air outlet sealing ring 27, then, the air outlet membrane 30 is connected with an air outlet membrane empty groove 38 formed between the air outlet sealing ring 27, an air outlet membrane limiting structure 39 is formed on the valve cover 4, during installation, the air outlet membrane limiting structure 39 extends into the air outlet membrane empty groove 38, wherein the air outlet membrane empty groove 38 is formed between the connection positions of the air outlet membrane 30 and the air outlet sealing ring 27, the shape of the air outlet membrane limiting structure 39 is not specifically limited, for example, the shape of a cylinder or a special shape, in this embodiment, the air outlet membrane limiting structure 39 is a U-shaped structure, and two legs of the air outlet membrane empty groove 38 extend into the air outlet membrane empty groove 39.

Further, an air inlet diaphragm limiting boss 41 is formed at the air inlet 23 of the second valve plate and used for limiting the air inlet diaphragm 29, and the inner sealing ring 28 surrounds the air inlet diaphragm limiting boss 41; the structural shape of the intake diaphragm limiting boss 41 is not particularly limited, and in this embodiment, the intake diaphragm limiting boss 41 is preferably a cylinder, further, the intake diaphragm limiting boss 41 forms a boss inclined surface 42, and further, the intake diaphragm limiting boss 41 forms an inner groove to avoid covering the second valve plate intake port 23.

Further, the air inlet seal ring 26 and the air outlet seal ring 27 are integrally formed; further, the shapes of the inlet seal ring 26 and the outlet seal ring 27 are larger and smaller.

Further, the first valve plate air outlet 24 is an annular boss air outlet.

Further, a special-shaped sealing ring mounting groove 40 is formed on the valve cover 4; further, the side of the special-shaped sealing ring installation groove 40 includes an outer side 52 formed on the valve cover main body 7, an air inlet block 53 and an air outlet block 54, the air inlet block 53 is adapted to the air inlet through groove 21, the air outlet block 54 is adapted to the air outlet through groove 22, the air inlet inclined surface 11 extends to the air inlet block 53, and the air outlet inclined surface 13 extends to the air outlet block 54.

Further, reinforcing ribs 43 are formed on both sides of the valve cover main body 7, respectively, and the free ends of the reinforcing ribs 43 are mounted on the valve plate 5 or the crankcase 1. The shape of the rib 43 is not particularly limited, and in this embodiment, it is a slightly deformed U-shaped structure, and both free ends thereof are connected to the bonnet main body 7.

Further, a valve plate mounting hole 44 is formed in the mounting portion 14 of the valve plate 5, a valve cover mounting hole 45 is formed in the valve cover main plate 7, a reinforcing rib mounting hole 46 is formed in the reinforcing rib 43, a threaded mounting hole 47 is formed in the crankcase 1, and the valve cover mounting hole 44 and the reinforcing rib mounting hole 46 are adapted to the valve plate mounting hole 45, and the valve cover 4 and the valve plate 5 are mounted on the crankcase 1 through bolts.

Further, a first positioning pin structure is formed between the valve cover 4 and the valve plate 5; a second positioning pin structure is formed between the valve plate 5 and the crankcase 1, the first positioning pin structure comprises a first positioning pin 48 arranged on the valve cover 4 and a first positioning pin hole 49 arranged on the valve plate 5, the second positioning pin structure comprises a second positioning pin hole 51 arranged on the valve plate 5 and a second positioning pin 50 arranged on the crankcase 1, and of course, the positioning pins and the positioning pin holes can be interchanged or mixed.

Further, the air inlet 61 and the air outlet 62 of the crankcase 1 are respectively formed with an air inlet seal groove 57 and an air outlet seal groove 58, and during installation, an air inlet seal ring and an air outlet seal ring are respectively installed in the air inlet seal groove and the air outlet seal groove.

Further, the crankcase 1 is further provided with a first cylindrical mounting hole 59, a second cylindrical mounting hole 60 and a process prepared hole 63.

Furthermore, the valve cover and the valve plate are arranged at two ends of the special-shaped sealing ring supporting platform and the special-shaped sealing ring in a shrinkage mode.

The utility model discloses a use as follows:

the vacuum cleaner adopts a horizontal reciprocating motion structure, a motor 64 is directly connected with an eccentric shaft 67 and drives the eccentric shaft to rotate, a connecting rod 66 and a diaphragm 3 are driven to do periodic reciprocating motion through a deep groove bearing 65, the volume of gas in a working cavity between the diaphragm 3 and a valve plate 5 is changed periodically together, in one period, when negative pressure exists in the working cavity, gas in a gas inlet joint 56 passes through a gas inlet 61, a first valve plate gas inlet 16, a gas inlet through groove 21, a gas inlet inclined plane 11 and a baffle through hole 12 along a gas inlet pipeline 55, a gas inlet diaphragm 29 is opened under the impact of gas flow and then enters the working cavity through a second valve plate gas inlet 23, and a gas outlet diaphragm 30 seals a first valve plate gas outlet 24; when negative pressure in the working cavity is changed into positive pressure, the air outlet diaphragm 29 closes the baffle through hole 12 under the pressure, the air outlet diaphragm is opened at the moment, air flow enters the inner cavity of the crankcase 1 through the air outlet 24 of the first valve plate, the air outlet inclined plane 13, the air outlet through groove 22, the air outlet 17 of the second valve plate, the air outlet 62 and the air outlet pipeline 25, and finally is exhausted through the noise elimination exhaust assembly 2. In a word, the eccentric shaft 67 rotates for a circle, the diaphragm connecting rods on the two sides reciprocate once, the working cavity on one side realizes the processes of air suction, compression, air exhaust and air suction, and the working cavity on the other side relatively realizes the processes of air exhaust, air suction, compression and air exhaust, namely, a cycle is completed.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (27)

1. A double-diaphragm vacuum pump for a vehicle is characterized by comprising a crankcase, wherein a driving assembly, a silencing exhaust assembly, a diaphragm and two groups of end cover assemblies are arranged on the crankcase; each end cover assembly comprises a valve cover, a valve plate and a special-shaped sealing ring arranged between the valve cover and the valve plate; the valve cover comprises a valve cover main body and an air inlet baffle plate, the valve cover main body comprises an air inlet groove and an air outlet groove, an air inlet inclined plane is formed at one position of the side wall of the air inlet groove, a baffle plate through hole is formed in the air inlet baffle plate, when the air inlet baffle plate covers the air inlet groove, the air inlet inclined plane and the side edge of the air inlet baffle plate form a valve cover air inlet, and an air outlet inclined plane is formed at one side of the side wall of the air outlet groove; the valve plate comprises a mounting part fixedly mounted with the crankcase and an arc-shaped structure formed in the mounting part, a first valve plate air inlet and a second valve plate air outlet are formed in the mounting part, the arc-shaped structure comprises an inner concave surface and an outer convex surface, a special-shaped sealing ring supporting platform is formed on the outer convex surface, an air inlet through groove and an air outlet through groove are formed in the special-shaped sealing ring supporting platform, the first valve plate air inlet is communicated with the air inlet through groove, the second valve plate air outlet is communicated with the air outlet through groove, and a second valve plate air inlet and a first valve plate air outlet are also formed in the valve plate; the air inlet of the first valve plate is communicated with the air inlet on the crankcase, the air outlet of the second valve plate is communicated with the air outlet on the crankcase, and the air outlet is communicated with the inner cavity of the crankcase through an air outlet pipeline; the special-shaped sealing ring comprises an air inlet sealing ring and an air outlet sealing ring, an inner sealing ring is formed in the air inlet sealing ring, an air inlet diaphragm is connected in the inner sealing ring, and an air outlet diaphragm is connected in the air outlet sealing ring.

2. The vehicular double-diaphragm vacuum pump according to claim 1, wherein an end surface of the intake baffle is provided with an intake groove engaging structure, and the intake groove engaging structure is engaged with an inner wall of the intake groove when mounted.

3. The vehicular double-diaphragm vacuum pump according to claim 2, wherein a support groove is formed around the intake groove, and the intake baffle is engaged with the support groove when mounted.

4. The vehicular double-diaphragm vacuum pump according to claim 3, wherein the support groove side wall forms a groove projection.

5. The vehicular double-diaphragm vacuum pump according to claim 4, wherein the other end face of the intake baffle forms an intake diaphragm limiting structure which is matched with an intake diaphragm empty groove between the intake diaphragm and the inner sealing ring.

6. The vehicular double-diaphragm vacuum pump according to claim 5, wherein the intake diaphragm limiting structure is a semi-surrounding type structure.

7. The vehicular double-diaphragm vacuum pump according to claim 6, wherein a semi-surrounding connection structure is provided between the inner seal ring and the air inlet seal ring.

8. The vehicular double-diaphragm vacuum pump according to claim 7, wherein the inner seal ring and the air inlet seal ring have a U-shaped connection structure therebetween.

9. The vehicular double-diaphragm vacuum pump according to claim 8, wherein the air outlet groove is a chamfered groove.

10. The dual-diaphragm vacuum pump for vehicles of claim 9, wherein a relief groove is formed on the air outlet groove; a reinforcing structure is formed on the air outlet membrane; when the structure is installed, the reinforcing structure is overlapped with the receding groove part.

11. The vehicular double-diaphragm vacuum pump according to claim 10, wherein a stopper is formed on the air outlet diaphragm and abuts against the air outlet groove.

12. The dual diaphragm vacuum pump of claim 11 wherein said outlet diaphragm is connected to said outlet seal ring at three points.

13. The vehicular double-diaphragm vacuum pump according to claim 12, wherein an outlet diaphragm empty groove is formed between the outlet diaphragm and the outlet seal ring, and an outlet diaphragm limiting structure is formed on the bonnet main body, and when the vehicular double-diaphragm vacuum pump is mounted, the outlet diaphragm limiting structure extends into the outlet diaphragm empty groove.

14. The vehicular double-diaphragm vacuum pump according to claim 13, wherein the bonnet main body is formed with a contour packing installation groove.

15. The vehicular double-diaphragm vacuum pump according to claim 14, wherein an intake diaphragm limiting boss is formed at the second valve plate intake port to limit the intake diaphragm, and the inner sealing ring surrounds the intake diaphragm limiting boss.

16. The vehicular double-diaphragm vacuum pump according to claim 15, wherein the intake diaphragm limit boss is formed with a boss slope.

17. The vehicular double-diaphragm vacuum pump according to claim 16, wherein the first-valve-plate air outlet port is an annular boss air outlet port.

18. The vehicular double-diaphragm vacuum pump according to claim 17, wherein reinforcing ribs are formed on both sides of the bonnet main body, respectively, and free ends of the reinforcing ribs are mounted on the valve plate or the crankcase.

19. A dual diaphragm vacuum pump for vehicle as claimed in claim 18, wherein said mounting portion of said valve plate is formed with a valve plate mounting hole, said valve cover main plate is formed with a valve cover mounting hole, said reinforcing rib is formed with a reinforcing rib mounting hole, said crankcase is formed with a screw mounting hole, said valve cover mounting hole and said reinforcing rib mounting hole are fitted with said valve plate mounting hole, and said valve cover and said valve plate are mounted to said crankcase by bolts.

20. The vehicular double-diaphragm vacuum pump according to claim 19, wherein a first positioning pin structure is formed between the valve cover and the valve plate; and a second positioning pin structure is formed between the valve plate and the crankcase.

21. The vehicular double-diaphragm vacuum pump according to claim 20, wherein the side edge of the special-shaped seal ring mounting groove comprises an outer side edge formed on the valve cover main body, an air inlet block and an air outlet block, the air inlet block is matched with the air inlet through groove, the air outlet block is matched with the air outlet through groove, the air inlet inclined surface extends to the air inlet block, and the air outlet inclined surface extends to the air outlet block.

22. The vehicular double-diaphragm vacuum pump according to claim 21, wherein the inlet seal ring is integrally formed with the outlet seal ring.

23. A dual diaphragm vacuum pump for vehicle use according to claim 22 wherein said inlet seal ring and said outlet seal ring are of a larger size than the other.

24. A dual diaphragm vacuum pump for vehicle use according to claim 23 wherein said inlet port of said crankcase is connected to an inlet connection by an inlet conduit.

25. A dual-diaphragm vacuum pump for vehicles as claimed in claim 24, wherein the inlet and outlet ports of the crankcase are formed with an inlet seal groove and an outlet seal groove, respectively, and the inlet seal groove and the outlet seal groove are fitted with an inlet seal and an outlet seal, respectively, when fitted.

26. A vehicular dual diaphragm vacuum pump according to claim 25 wherein the two sets of end cap assemblies are mounted symmetrically.

27. The vehicular double-diaphragm vacuum pump according to claim 26, wherein the crankcase is further provided with a first cylindrical mounting hole, a second cylindrical mounting hole and a process-reserved hole.

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