CN104379932B - With the pump life-span for improving and the membrane pump of efficiency - Google Patents

Abstract

A kind of membrane pump, its life-span and improved entrance and exit valve for having improved wobble-plate and cam/bearing assembly to extend pump are designed to increase effective sealing area.Cam/bearing assembly include cam, its by the inner ring of direct injection moulding to bearing in case the cam is pulled open from the bearing.The wobble-plate by direct injection moulding to the outer ring of the bearing in case the wobble-plate is pulled open from the cam and bearing.Entrance and exit check-valves includes circular periphery release area, it forms effective sealing area when on the sealing station of valve seat band rather than a line, and it eliminate or reduces sealing inconsistency and improves leakage efficiency.

Description

With the pump life-span for improving and the membrane pump of efficiency

Technical field

The present invention relates generally to membrane pump, and relate more particularly to improved cam/bearing assembly for membrane pump, change Wobble-plate/the bearing assembly and improved valve module for entering.

Background technology

Reciprocating pump using one or more oscillating pistons, plunger or film (barrier film) to make fluid move through check-valves The motion of fluid is limited to those pumps in required direction.One type of reciprocating pump is membrane pump.Membrane pump is to use Barrier film, such as diaphragm of rubber, for drive in barrier film formed a series of pistons wobble-plate, in the piston for housing barrier film On the valve chest of structure formed a series of rooms and be attached to valve chest for most at last fluid from inlet pump to outlet Suitable non-return check-valves reciprocating action combination positive-displacement pump.

Membrane pump is generally used for the fluid of relatively small amount, and such as water moves to another position from a position.For example, barrier film Pump can be used for Jiang Shui and move to or remove recreation vehicle of property etc..For business application, the typical flow of membrane pump is up to often 10 gallons (GPM) of minute, but the membrane pump with negotiability higher can also be used for commercial Application.

Membrane pump is typically what is driven by the motor including drive shaft, air motor or electro-motor.It is put into drive shaft The in rotary moving of drive shaft is converted into a series of pistons by cam and ball bearing assembly and wobble-plate between by wobble-plate Push-and-pull campaign.Wobble-plate is mechanically linked to barrier film.The nutating action of barrier film and wobble-plate plays a role to activate each work Plug makes to be pushed into and pull out each room with by fluid in its each room in subsequently entering a series of rooms limited on valve plate.

Membrane pump is typically single-acting, and fluid is pulled to valve plate by it on a direction of piston movement from inlet In one room, and fluid is emitted into downstream chamber from the room on another direction of piston movement.More specifically, working as valve plate The volume of room (removed from the room when piston or when being removed from the room) when increasing, pressure reduction in the chamber and fluid from Inlet with the entrance communication of pump is drawn in the room.When the pressure of the room then increases because of volume reduction (piston is moved in the room or rushes the room and moves down), the fluid being inhaled into before in the room be forced to flow out the room and entrance with In the downstream chamber of the outlet communication of pump.

Finally, move up and remove the barrier film of the room and draw fluid into the room again, complete one cycle.

For example, describing the reality of membrane pump in U.S. Patent number 5791882,6048183,6623245 and 6840745 Example, all these patents are incorporated herein in entirety by reference.

As discussed above, wobble-plate is operably attached to the drive of the rotation of motor through cam/bearing assembly Moving axis.More particularly, cam is attached to the drive shaft on the inner surface of cam, so that cam revolves not with respect to axle Then be to rotate together with the axis.Cam also include outer ring surface, its inner ring for being attached to ball bearing so that cam not Rotated relative to the inner ring of ball bearing.Wobble-plate is attached to the outer ring of ball bearing so that wobble-plate around cam/ Bearing assembly, and wobble-plate rotates not with respect to the outer ring of ball bearing.

During the operation of pump, particularly during continuous start, because of the internal friction in bearing and from motor Radiant heat and produce heat.Due to formation cam, bearing and in wobble-plate, the material of each has different expansion rates, therefore Produced heat can make the connection between cam and bearing and between wobble-plate and bearing fluff.When connection fluffs, flowing Performance impairment, so that can be by the 50% reduction flow more than its ability.Generated after connection fluffs because more caused by friction Heat, its acceleration declines and ultimately results in bearing and breaks down.

Another common schema of connecting fault in cam and bearing or between bearing and wobble-plate is due in horse Caused by the offset orientation of the cam in drive shaft for reaching.Then, be placed in for excessive load and can make wobble-plate by nutating action From the wobble-plate that bearing and/or cam are shifted over.Because the offset resistance and harmonic oscillation that cause of wobble-plate can also make axle Hold and fluff.Similar with content above, when connection fluffs, mobile performance is damaged, so that can be by 50% more than its ability Reduce flow.

A kind of technology of the persistence and reference picture 1 for extending cam/bearing connection 1 be by cast zinc alloy be made it is convex Wheel 10 is pressure bonded in the inner ring 14 of bearing 12, so as to form interference fit.Cam 10 can be by by the punching press of pit 16 to cam 10 Face 18 in and by staking in place to realize more preferable persistence, as shown in figure 1, so that cam 10 deform with help by It is maintained in bearing 12.Although the persistence of connection will have been improved in the staking of cam 10 to bearing 12, but in length Failure is still can be appreciated that after the continuous duty start of phase.

On wobble-plate as shown in Figure 2/bearing connection 20, in period of assembly, the wobble-plate 22 being made up of cast aluminium alloy It is heated to 140 degrees Celsius and bearing 12 is depressed into wobble-plate 22.Because wobble-plate 22 is machined as tight tolerance, After wobble-plate 22 is cooled down and shunk, there is close interference fit between the outer ring 28 of bearing 12 and wobble-plate 22.Then, shake Wobble plate 22 by staking 24 so that bearing 12 further is fixed into wobble-plate 22, as shown in Figure 2.Further, install Multiple fixed screws 26 are so that the outer ring 28 of bearing 12 will not be in the internal rotating of wobble-plate 22.Even in the company of 1000+ hours After continuous start, even the technology greatly reduces the loose connection status completely eliminated between wobble-plate and bearing.However, In period of assembly, the technology is both expensive and time consuming.

On check-valves and valve chest component, found generally in membrane pump on valve chest and by valve chest The entrance and exit valve being loaded with has the problem of inconsistent sealing, so as to create a further reduction the operating efficiency of pump.

Reference picture 3A-4B, the inlet valve 30 of prior art includes central mounting portion 32, such as pillar, and around pillar The elastic packing forming part 34 of 32 one end 36.Central mounting portion 32 plays a role with solid in the valve seat 38 of the room of valve chest Determine inlet valve 30.Elastic part 34 includes core 40 and periphery release area 42 or lip.Periphery release area 42 plays a role To form sealing during slight curvature in the valve seat 38 of valve chest, so as to seal and limit by the fluid communication of ingate.

Reference picture 4A-4C, the valve in the prior art drawn is installed in the valve seat of the room of valve chest.Reference picture 4A, On first position of the side 44 in loosening in shown periphery release area 42, i.e. being assembled in, preceding valve in valve seat is naturally residing State, and shown the second side 46 is then on the sealing station in slight curvature, i.e., at this moment the piston of barrier film is just moving to installation Have in the room of inlet valve to limit or entirely prevent flow of fluid.As shown in FIG. 4 C, the first of shown periphery release area 42 Side 44 is again on the position loosened, i.e., in the state being assembled in valve seat where preceding valve nature, and the second shown side On 47 positions in bending or opening, so that periphery release area 42 significantly bends or is carried away the seat to allow fluid Flowing.As shown in Figure 4 A, the cross section in periphery release area includes step part or by represented by discrete or discontinuous function Mathematics profile.Mitigate however, being somebody's turn to do " step " design and providing minimum bending, because it only enters along the edge of lip 42 Row sealing, so as to effective sealing area 48 of valve 30 is limited into fine rule (as seen on side 46), generates sealing Inconsistency.

Reference picture 5A-6B, the outlet valve 50 of prior art includes central mounting portion 52, such as pillar, and around pillar The elastic packing forming part 54 of 52 one end.Central mounting portion 52 plays a role with solid in the valve seat 56 in the outside of valve chest Outlet valve 50 is determined, so that outlet valve 50 extends between two rooms of valve chest.Elastic part 54 includes the He of core 58 Periphery release area or lip 60.Periphery release area 60 play a role with valve chest formed sealing so that seal and limit from The fluid communication that room passes through outlet opening, i.e. at this moment the piston of barrier film moves out the room.

Reference picture 6A and 6B, the outlet valve 50 in shown prior art are mounted on the valve seat 56 outside valve chest In, so that the outlet opening of the room of outlet valve covering valve chest.First side 62 in shown periphery release area 60 is in what is loosened On position, i.e. being assembled in preceding valve nature state in which in valve seat, and shown the second side 64 is then in slight curvature On sealing station, i.e. so as to limit or entirely prevent this flow of fluid.This is that occur to go out when the piston of barrier film moves out this During the room that mouth valve 50 is installed.When periphery release area 60 bends substantially or carried away the seat to allow flow of fluid, at the valve In on release position.Such as shown in the figure, the cross section in periphery release area 60 includes step part or by discrete or discontinuous Function represented by mathematics profile.Mitigate however, being somebody's turn to do " step " design and providing minimum bending, because it is only along lip The edge in portion 60 is sealed, so as to effective sealing area 66 of valve 50 is limited into fine rule (as seen on one side 64 ), generate sealing inconsistency.

Additionally, the inconsistency in effective sealing area can be produced during the valve of manufacture prior art.When to existing When the valve for having technology is molded, mould generally includes two halves.In the place that two halves meet, it is possible to which flash occurs, its It is the material extruded on the parting line of two halves.Reference picture 5B and 6B, the parting line 68 and 70 generally with inlet valve or outlet valve The sealing margin of lip be coextensive.This can cause inconsistent sealing margin so as to cause inconsistent sealing.

In view of the problem of existing membrane pump, it is still desirable to a kind of improved cam/bearing assembly and improved bearing/shake Wobble plate component to improve life-span and the efficiency of pump, without dramatically increasing time, complexity and cost for manufacturing pump.Additionally, There is still a need for a kind of improved check valve design is improving effective seal feature of entrance and exit valve.

The content of the invention

Embodiments of the invention are related to a kind of improved membrane pump, and it includes improved wobble-plate and bearing assembly, improvement Cam and bearing assembly and improved valve module improving reliability, life-span and the efficiency of pump.In embodiments of the invention In, improved cam and bearing assembly include cam, its by the inner ring of direct injection moulding to bearing in case by cam from axle Bear out.In further embodiment of the invention, improved wobble-plate and bearing assembly include wobble-plate, and it is directly molded In case wobble-plate is pulled open from cam and bearing assembly on shaping to the outer ring of bearing.In further embodiment of the invention, Improved entrance and/or outlet non-return valve include circular periphery release area, its formation when on the sealing station of valve seat The band rather than a line of effective sealing area, it eliminate or reduces sealing inconsistency and improves leakage efficiency.

Generally, according to an embodiment of the invention membrane pump may include for accommodate pump group part including protecgulum and bonnet Pump case.Protecgulum includes inlet, outlet and the outlet with outlet communication of entrance and entrance communication Room.The pump includes motor sub-assembly, and it includes motor and rotatable drive shaft, wherein after rotatable drive shaft is extended through Lid.Cam and bearing assembly are attached to drive shaft and wobble-plate is fixed to the outer ring of bearing and is fixed relative to it. Wobble-plate includes multiple piston structures, itself and be attached to the piston of the barrier film in the face of the wobble-plate with piston structure thereon Structure is corresponding.The combination of piston structure and barrier film forms piston.

Valve module is fixed and including multiple rooms and multiple check-valves through housing relative to barrier film/wave board component, wherein often Individual room is in fluid communication with each selectivity in the inlet and downstream chamber of protecgulum.Check-valves can be in release position and closure Switch between sealing station, wherein on release position, a communication in the room and inlet and downstream chamber, and On the sealing station of closure, the room not with entrance and exit room in a communication.

Cam and bearing assembly are suitable to be converted into the rotary motion of drive shaft the nutation movement of wobble-plate, so that each Piston engages a room of valve module in order, so forced during suction stroke fluid flow in the room from inlet and The room is pushed fluid out during discharge stroke to enter in downstream chamber, stroke produces taking out for fluid with reciprocation cycle with by pump Suction is acted.

In one embodiment of the invention, improved cam and bearing assembly include cam, and it includes being fixed on axle The plastic cam of the injection moulding in inner ring held, so as to the inner ring relative to bearing fixes cam, and its cam is coupled It is fixed with relative to drive shaft to drive shaft.The annular wall of the inner ring of bearing includes limiting one or more recesses The annular wall of structure, wherein recess and cam is engaged, so as to prevent cam from being rotated relative to the inner ring of bearing.Further Ground, the face of outside first of its cam and outside second face include the inner ring of annular retaining lip, annular retaining lip and bearing Corresponding outside lean, wherein keeping the lip to prevent cam from transverse shifting occurring relative to the inner ring of bearing.

Additionally or alternatively, wobble-plate carries out injection moulding above the outer ring of bearing, so as to be revolved relative to outer ring Turn and laterally fix wobble-plate.In this embodiment, the outer ring of bearing includes limiting the structure of one or more scrobiculas, wherein The inner annular wall and scrobicula of wobble-plate are engaged, so as to prevent wobble-plate from being rotated relative to the outer ring of bearing.

The face of the inner ring of bearing includes limiting for waving the default position of board mold and can for wave plate injection moulding The structure of the slot of the fixed cam in release ground and bearing.In the first edge and second edge of the inner annular wall of wobble-plate at least One include keep lip, and wherein keep lip it is corresponding to the outer ring of bearing outside lean so that wobble-plate relative to The outer ring of bearing carries out horizontal fixation.

Wobble-plate improved according to an embodiment of the invention and bearing assembly are including being presented the bearing of outer ring and inner ring, being in Now for the multiple piston structures for housing the plastic rocker plate of the center ring of bearing wherein and radially extend from center ring, Wherein wobble-plate is fixed to the outer ring of bearing by injection moulding, so that relative to outer ring in middle fixation horizontal and in rotary moving Wobble-plate.Bearing includes limiting the structure of one or more scrobiculas, the wherein inner annular wall of the center ring of wobble-plate and scrobicula phase Engagement, so as to prevent wobble-plate from being rotated relative to the outer ring of bearing.The face of the inner ring of bearing includes limiting to be used for for waving Plate injection moulding waves the default position of board mold and the releasedly structure of the slot of fixing bearing.

In one embodiment, at least in the first edge and second edge of the inner annular wall of the center ring of wobble-plate It is individual including keep lip.Lip outside corresponding to the outer ring of bearing is kept to lean so that wobble-plate is outer relative to bearing Circle carries out horizontal fixation.

The cam of wobble-plate and the bearing assembly also plastics including injection moulding, it is fixed in the inner ring of bearing, from And relative to bearing inner ring in middle fixed cam horizontal and in rotary moving.The annular wall of the inner ring of bearing include limit one or The annular wall of the structure of multiple recesses, wherein recess and cam is engaged, so as to prevent cam from being revolved relative to the inner ring of bearing Turn.Further, at least one of the face of outside first of cam and outside second face include annular retaining lip, annular retaining Lip outside corresponding to the inner ring of bearing leans, wherein it is horizontal to keep lip to prevent cam from occurring relative to the inner ring of bearing It is mobile.

Some embodiments of the invention, the valve module for membrane pump includes presenting the valve casing of the first side and the second side Body, the first side includes multiple rooms, wherein each room include limiting entrance valve seat, the structure of multiple ingates and multiple outlet openings and Second side includes limiting the structure of multiple outlet valve seats.Inlet valve is located in the entrance valve seat of each room in multiple rooms, so that Inlet valve optionally seals multiple ingates of the room.Outlet valve is located in each outlet valve seat of valve chest, so as to use Mouth valve optionally seals a multiple outlet openings for room.

Each in inlet valve and outlet valve is included for the mounting portion of installation valve or pillar in corresponding valve seat And around the elastic part of mounting portion one end, wherein the corresponding entrance of being suitably selected for property of elastic part ground closed chamber or go out Oral pore.Elastic part includes core and external seal part, and wherein outer seal portion point includes rounded sealing surface, so that valve Effective sealing area include the fine rule that the valve of a band rather than prior art is formed.

In one embodiment, valve chest includes 5 rooms and the entrance valve seat in each room.The second of valve chest Side includes 5 outlet valve seats and wherein each outlet valve seat overlaps with a part for two rooms.

Each entrance valve seat includes limiting the structure of mounting hole, and wherein the mounting portion of inlet valve includes pillar, the post Son forms the interference fit with mounting hole to fix inlet valve in inlet valve.Each outlet valve seat includes limiting for housing out The structure of the valve mounting recess of the pillar of mouth valve.By by pillar insert outlet valve seat valve mounting recess in and radially (or Laterally) stationary exit valve.Then, additionally, (or vertical vertically by the pillar that extends from the inner surface of the downstream chamber of top cover Ground) stationary exit valve.

Above-mentioned summary of the invention is not intended as describing each the disclosed embodiments or each embodiment of the invention. Following drawings and detailed description have more specifically illustrated these embodiments.

Brief description of the drawings

Can by considering the following detailed description of each embodiment and with reference to accompanying drawing embodiments of the invention being more fully understood, Wherein：

Fig. 1 is the top perspective sectional view of cam according to prior art and bearing assembly.

Fig. 2 is the bearing and the top perspective sectional view for waving board component according to prior art.

Fig. 3 A are the top view of the inlet valve according to prior art.

Fig. 3 B are the viewgraph of cross-section taken along the 3B-3B of Fig. 3 A.

Fig. 4 A are the viewgraph of cross-section of the inlet valve of Fig. 3 B in valve seat.

Fig. 4 B are the viewgraph of cross-section of the inlet valve of Fig. 3 B in valve seat.

Fig. 4 C are the viewgraph of cross-section of the inlet valve of Fig. 3 B in valve seat.

Fig. 5 A are the top view of the outlet valve according to prior art.

Fig. 5 B are the viewgraph of cross-section taken along the 5B-5B of Fig. 5 A.

Fig. 6 A are the viewgraph of cross-section of the outlet valve of Fig. 5 B in valve seat.

Fig. 6 B are the viewgraph of cross-section of the outlet valve of Fig. 5 B in valve seat.

Fig. 7 A are the membrane pump according to one embodiment of the present of invention.

Fig. 7 B are the exploded view of the membrane pump according to Fig. 7 A.

Fig. 8 is the top perspective view inside the protecgulum of the membrane pump of Fig. 7 A according to one embodiment of the present of invention.

Fig. 9 A are the top view of the first side of the valve chest according to one embodiment of the present of invention.

Fig. 9 B are the top view of the second side of the valve chest of Fig. 9 A.

Figure 10 A are the top view of the first side of the valve chest of Fig. 9 A for being provided with inlet valve wherein.

Figure 10 B are the top view of the second side of the valve chest of Fig. 9 B for being provided with outlet valve wherein.

Figure 11 is the sectional plain-view drawing of the membrane pump of Fig. 7 A and 7B.

Figure 12 is the top perspective sectional view of cam according to one embodiment of the present of invention and bearing assembly.

Figure 13 is the top perspective view of the bearing according to one embodiment of the present of invention.

Figure 14 A are the first half of the cam die according to one embodiment of the present of invention.

Figure 14 B are the second the half of the cam die of Figure 14 A.

Figure 15 is the first the half and the second half of the cam die of the Figure 14 A and 14B that are sealed.

Figure 16 is the top perspective sectional view of wobble-plate according to one embodiment of the present of invention and bearing assembly.

Figure 17 is the cam of Figure 12 and the top perspective view of bearing assembly.

Figure 18 A are the front view according to wave board mold the first the half of one embodiment of the present of invention.

Figure 18 B are the front view of wave board mold the first the half of Figure 18 A for being wherein fixed with cam and bearing assembly.

Figure 19 is wave board mold the first the half and the second half of the Figure 18 A and 18B that are sealed.

Figure 20 a are the top view of the inlet valve according to one embodiment of the present of invention.

Figure 20 b are the inlet valve of Figure 20 a along the viewgraph of cross-section of 20B-20B.

Figure 21 a are viewgraph of cross-section of the inlet valve of Figure 20 b in valve seat.

Figure 21 b are viewgraph of cross-section of the inlet valve of Figure 20 b for depicting mould split line in valve seat.

Figure 22 a are the top view of the outlet valve according to one embodiment of the present of invention.

Figure 22 b are viewgraph of cross-section of the outlet valve of Figure 22 a in 22a-22a.

Figure 23 a are viewgraph of cross-section of the inlet valve of Figure 22 b in valve seat.

Figure 23 b are viewgraph of cross-section of the inlet valve of Figure 22 b for depicting mould split line in valve seat.

Figure 24 is the viewgraph of cross-section of the outlet valve of Fig. 5 A.

Although can easily carry out various modifications to the present invention and use alternative form, shown in accompanying drawing Example shows details of the invention and will be described in detail.It is to be appreciated, however, that the present invention is not intended to limit the present invention In described specific embodiment.On the contrary, present invention encompasses all modifications fallen among the spirit and scope of the present invention, etc. Jljl and alternative solution.

Specific embodiment

A kind of reference picture 7A-7B, membrane pump 100 generally includes two parts shell, and it includes protecgulum 102 and bonnet 104, its Middle bonnet 104 is attached to motor sub-assembly 106 or accommodates motor sub-assembly 106.Alternatively, membrane pump 100 may include installing mechanism 107, such as pedestal, leg or mounting bracket are with fixed on the surface or positioning membrane pump 100.

Reference picture 8, protecgulum 102 has entrance 108 and outlet 110.Entrance 108 can be connected to entrance fluid line and (not show Go out) and outlet 110 can be connected to outlet fluid line (not shown).Each in entrance and exit 108 and 110 is equipped with use In the annex for being connected to arrival line and egress line.Each in entrance 108 and outlet 110 is towards the inlet 112 of mutual exclusion With downstream chamber 114.In one embodiment, downstream chamber 114 be arranged in the central area of protecgulum 102 and be by with outlet The wall of 110 communications is defined around thing 118.Downstream chamber 114 also includes inner surface or bottom surface 116, and it has from its edge Axially extending one or more pillars 113a-113e.Pillar 113 is suitable to abut or props up seat positioned at adjacent protecgulum The outer surface of the outlet valve in valve module on 102, as discussed in more detail below.Generally, the quantity of pillar 113 and position It is corresponding with the quantity of the outlet valve seat of valve module and position.

Inlet 112 is around downstream chamber 114 and to be defined in wall around the space between thing 118 and the side wall of protecgulum 102. Inlet 112 and the communication of entrance 108.One of ordinary skill in the art should be understood that the configuration that can have replacement, only Want entrance 108 and the communication of inlet 112, outlet 110 and the communication of downstream chamber 114 and inlet 112 and outlet Room 114 be separated so that inlet 112 and downstream chamber 114 not directly with communication each other.

For example, motor sub-assembly 106 may include motor (not shown), it has the drive shaft for extending through bonnet 104 122.Cam 124 is attached to the drive shaft 122 of motor sub-assembly 106 and will not be rotated relative to drive shaft 122, is on the contrary and drive Moving axis 122 rotates together.Then, cam 124 is attached to wobble-plate 128 through ball bearing 126.Specifically, cam 124 is joined The inner ring 125 of bearing 126 is connected in case cam 124 rotates relative to the inner ring 125 of bearing 126.It is discussed more fully below Cam/bearing assembly 200.

Then, the outer ring 127 of bearing 126 be attached directly to wobble-plate 128 be formed in wobble-plate shown in Figure 16/ Bearing assembly 300.Specifically, wobble-plate 128 includes limiting the center for accommodating cam/bearing assembly 200 wherein The structure of boss 130.Connection between the outer ring 127 of bearing 126 and wobble-plate 128 causes to prevent gear/shaft bearing assembly 200 Pulled out and prevented wobble-plate 128 from being rotated relative to the outer ring 127 of bearing 126 from wobble-plate 128.It is described in more detail below Wobble-plate/bearing assembly 300.

Wobble-plate 128 is included in the multiple piston portions 132 formed on the first face 131 of wobble-plate 128, makes each piston Part 132 extends from the first face 131 of wobble-plate 128.In one exemplary embodiment of the present invention as shown in figure 16, shake Wobble plate 128 includes 5 piston portion 132a-132e.However, one of ordinary skill in the art will be recognized that also contemplating for than 5 Individual less or more piston portion.

By elastomeric material, the single-piece barrier film 134 that such as rubber is made is consolidated by traditional fastener (for example, screw) Determine to the first face 131 of wobble-plate 128.Barrier film 134 can be relatively flat or may include that multiple is sleeved on wobble-plate 128 Piston structure 136 on corresponding piston portion 132.In one embodiment, piston structure 136 includes clothoid.

Valve module 138 is sandwiched between protecgulum 102 and barrier film 134.Valve module 138 generally includes valve chest 140, multiple quilts The inlet valve 142 and multiple for being fixed to the first side 141 of valve chest 140 are fixed to the second relative side of valve chest 140 143 outlet valve 144.Reference picture 9A, the first side 141 of valve chest 140 include multiple rooms 146 and the quantity of the room 146 with shake The quantity of the piston portion 132 of wobble plate 128 is corresponding.In one exemplary embodiment of the present invention as depicted, valve casing Body 140 includes 5 rooms 146.

Each room 146 includes top 148 and bottom 150.Preferably, top 148 is circular and bottom 150 is taper , so that the periphery of each room 146 is tear drop shape or egg type.However, each room 146 can take any other required shapes Shape, including but not limited to circle, rectangle, elongated shape or irregular shape.

The circular portion 148 on top includes limiting the structure for the entrance valve seat 152 of positioning inlet valve 142 thereon. Entrance valve seat 152 includes the ingate 154 that multiple is extended through from it, so as in the inlet of corresponding room 146 and protecgulum 102 Formed between 112 and be in fluid communication.Ingate 154 can be any suitable shape, and it includes but is not limited to circular, elongated shape Shape or ellipse.The circular portion 148 on top is also included for the accommodating inlet valve for being used for and being fixed thereon inlet valve 142 142 central mounting portion 158 or the valve mounting hole 156 of pillar.

Preferably, inlet valve 142 is located in entrance valve seat 152, so as to allow fluid to pass through ingate from inlet 112 154 enter in corresponding room 146, but fluid will not leave room 146 by ingate 154.More specifically, when inlet valve 142 When seat is in the valve seat 152 of each room 146, the periphery release area 160 of inlet valve 142 or lip cover ingate 154.Inlet valve 142 can switch between release position and sealing station, wherein when on release position, periphery release area 160 bend substantially or The valve seat is lifted out to allow fluid from the corresponding room 146 that ingate 154 flows to valve chest 140 from inlet 112, And when on sealing station, limit or entirely prevent the flow of fluid by ingate 154, so as to inlet 112 and each Without fluid communication between room 146.It has been described in more detail below the design of inlet valve 142.

Second side 143 of valve chest 140 includes center output area 158, and its periphery is limited by female rail 160, wherein The shape of the female rail 160 is corresponding around thing 118 with the wall of protecgulum 102, so that wall coordinates pass for 160 one-tenth around thing 118 and female rail The mode of system is installed.In one embodiment of the invention, female rail 160 includes the pentagonal track with 5 sides, and it corresponds to The pentagonal wall of downstream chamber 114 of protecgulum 102 is limited around thing 118.Center output area 158 is entered by with protecgulum 102 The outer surface on the top 148 of the room 146 of mouth room 112 communication is circular.

In center output area 158, the second side 143 of valve chest 140 is included for positioning outlet valve 144 thereon Multiple outlet valve seats 162.The quantity of outlet valve seat 162 corresponds to the quantity of room 146.In an exemplary implementation shown in Fig. 9 B In example, the second side 143 of valve chest 140 includes 5 outlet valve seat 162a-162e.Outlet valve seat 162 deviates the first side 141 Room 146, so that each outlet valve seat 162 extends or across on two rooms 146 between two rooms 146.

Outlet valve seat 162 includes multiple outlet openings 164.Outlet opening 164 can be any suitable shape, and it is included but not It is limited to circular, elongated shape or ellipse.Each outlet opening in multiple outlet openings 164 extends through valve chest 140 and causes Each outlet opening 164 fluid communication selective with 150 one-tenth of the bottom of single chamber 146.

Outlet valve seat 162 also includes defining for housing the central mounting portion 168 of outlet valve 144 or the valve recess of pillar Be fixed to outlet valve 144 thereon with radially (or laterally) by 66 structure.In one embodiment, valve recess 66 is not complete Extend through valve chest 140 entirely.The pillar 113 extended by the ground 116 with the downstream chamber 114 from protecgulum 102 is leant, and Extraly (or vertically) stationary exit valve 144 vertically, as shown in Figure 24.

Preferably, outlet valve 144 is located in outlet valve seat 162, is flowed out accordingly so as to allow fluid from outlet opening 164 Room 146 and the downstream chamber 114 of protecgulum 102 is flow to, but fluid will not enter the corresponding room of valve chest 140 by outlet opening 164 146.More specifically, the periphery release area 170 of outlet valve 144 or lip only cover the outlet opening for installing its outlet port 162 164.Outlet valve 144 can switch between release position and sealing station, wherein when on release position, periphery release area 170 This is bent substantially or is lifted away to allow from the corresponding room 146 of the valve chest 140 for being extended with outlet opening 164 to protecgulum 102 Downstream chamber 114 flow of fluid, and when on sealing station, limit or entirely prevent the flow of fluid by outlet opening 164, It is in fluid communication so as to not have between corresponding room 146 and downstream chamber 114.It has been described in more detail below outlet valve 144 Design.

During the operation of pump, the drive shaft 122 of motor sub-assembly 106 rotates.Cam 124 serves as eccentric wheel, and it is by motor The motion-transmitting push-pull for being converted into piston in rotary moving of the drive shaft 122 of component 106.More specifically, cam 124 produces wobble-plate 128 offset movement, so that the piston portion 132 of wobble-plate 128 forces the piston structure 136 of barrier film 134 to pass in and out valve chest 140 room 146.The top 148 of each room 146 of valve chest 140 has suitable size to house the corresponding of wobble-plate 128 The piston structure 136 of piston portion 132 and barrier film 134.The piston portion 132 of wobble-plate 128, barrier film 134 and it is present in room The combination of the fluid in 146 is generated for reciprocating piston in the room 146, so that the relation of forming chamber/piston.

Fluids through inlet ports 108 are introduced into the inlet 112 of protecgulum 102.In suction stroke, piston bounces back from room 146 in other words Period, the pressure in the room 146 of valve chest 140 reduces, so that inlet valve 142 is opened and forces a fluid through ingate 154 Enter to enter the room in 146 from the inlet 112 of protecgulum 102.In discharge stroke, piston entered to enter the room 146 periods in other words, in room 146 Pressure increases above the pressure in downstream chamber 114 to force outlet valve 144 to be opened, so as to compel to pass the fluid through outlet opening 164 flow Go out room 146 and enter downstream chamber 114, and it is final through the outflow of outlet 110 downstream chamber 114.Due to cam/bearing assembly 200 and shaking The offset cam effect of the relation of wobble plate 128, wobble-plate 128 can be subject to nutation movement, cause the piston reciprocating of barrier film to act with phase Go on out valve chest 140 room 146 to provide suction action.

As discussed in the background section, the most common failure of conventional diaphragm pump be cam in bearing fluff and/ Or the bearing in wobble-plate fluffs.This can significantly decrease the run time and/or flow of pump.

According to one embodiment of present invention, as shown in Figure 12, improved cam/bearing assembly 200 includes passing through Plastic cam 202 of the injection moulding by direct forming in the inner ring 204 of bearing 206.Cam 202 is included in the He of the first face 210 Annular retaining lip 208a and 208b on second face 212.The first holding lip 208a in the first face 210 is interior with bearing 206 First outside 214a of circle 204 leans and second keeps the second outside 214b phases of lip 208b and the inner ring 204 of bearing 206 Against in case cam 202 is drawn out bearing 206.One or more recesses 216 are machined into the ring of the inner ring 204 of bearing 206 In the edge of shape wall 218, so that the plastic material of cam 202 is flow in recess 216, so as to prevent cam 202 relative to axle The inner ring 204 for holding 206 rotates.

In order to manufacture cam/bearing assembly 200, reference picture 14A-15 has been used with the first half 220a and the second half The cam die 220 of 220b.The first half 220a of cam die 220 are included for positioning wherein and keeping the recessed of bearing 206 Fall into part 222.The outer ring 224 of bearing 206 is used to make bearing 206 placed in the middle in the first half 220a of mould 220.Alternatively, magnetic Iron 226 can be placed in the bottom wall 228 of sunk part and/or annular sidewall 230 to help in the first half 220a of mould 220 Keep bearing 206.The first half 220a also include the center post of the centre bore for forming cam 202.Center post 232 can be wrapped Circular portion 234 and flat 236 is included to form the bias for the cam 202 for producing nutating to act in wobble-plate 302 Centre bore 202.Multiple ribs 238 are around center post 232 with the multiple holes 240 of formation in the first face 210 of cam 202.

The second half 220b of cam 220 are included for accommodating the sunk part 242 of bearing 206 and for accommodating mould The center recessed portion 244 of the center post 232 of 220 the first half 220a.Center recessed portion 244 have enough depth with The one end and center recessed portion 244 for making center post 232 lean, so as to form the centre bore of cam 202 and extend it By the entire depth of cam 202.The second half 220b also include the multiple ribs 246 around center recessed portion 244 to be formed Multiple holes in the second face 212 of cam 202.

Once bearing 206 is located in the first half 220a of mould 220, the first and second half 220a and 220b of mould 220 Then it is sealed together, as shown in Figure 15.The two halves 220a and 220b of mould is sealed on the inner ring 204 of bearing 206.It is interior Portion space 248 is first by recess 216, center post 232 and the mould 220 being included in the annular wall 218 of inner ring 204 Limited with the inner ring 204 of the bearing 206 of the rib 238 and 246 of the second half 220b.The second half 220b of mould 220 include For the cast gate 250 being molded.The plastic material of melting is injected into the inner space 248 of mould 220 to form gear 202. After cooling plastic material, the two halves of mould 220 are unsealed immediately and projects cam/bearing assembly 200 from mould 220.

Reference picture 16 and 17, cam/bearing assembly 200 be used to further form wobble-plate/bearing assembly 300.Shake Wobble plate/bearing assembly 300 includes cam/bearing assembly 200 as described above and by injection moulding in cam/bearing group The plastic rocker plate 302 formed around part 200.Wobble-plate 302 includes having for housing wherein and keeping cam/bearing The annulus 304 of the centre bore 314 of component 200, restriction extend through the structure in multiple holes 308 of annulus 304 and from annulus 304 Multiple piston portions 310 of extension.Each piston portion 310 includes loop section 312 and for housing thereon and fixing barrier film 134 centre bore 314.As discussed above, piston portion 310a drives the corresponding piston structure 136 of barrier film 134 to pass in and out The corresponding room 146 of valve chest 140 is used for the relation of the piston/room of reciprocal suction action with formation.

The outer ring 224 of the bearing 206 of cam/bearing assembly 200 is machined with one or more pits 316, so that shape Plastic material into wobble-plate 302 flow in pit 316 to prevent from cam/bearing assembly 200 being pulled out into wobble-plate 302 and being prevented Wobble-plate 302 rotates relative to the outer ring 224 of bearing 206.

In order to manufacture wobble-plate/bearing assembly 300, reference picture 18A-19 has been used with the first half 318a and the second half 318b's waves board mold 318.Waving the first half 318a of board mold 318 is included for positioning wherein and keeping convex wheel axle The sunk part 320 of bearing assembly 200.The dowel pin 322 formed on the bottom surface 324 of sunk part 320 corresponds in bearing 206 Circle 204 face on mach slot 326 to form matching relationship, so as to help the centralized positioning gear/shaft in wobble-plate 302 Bearing assembly 200.Sunk part 320 around and limit center cavity 328 to isolate cam 202 so that cam 202 is without interference with mould The tool operation of tool 318.Alternatively, magnet or magnetic stripe 330 can be placed in bottom and/or the annular sidewall of sunk part 320 Helping keep bearing 206 in the first half 318a of mould 318 in a part.

The first half 318a also include multiple posts of the centre bore 314 of each piston portion 310 for forming wobble-plate 302 Son 332.In the embodiment shown in, each pillar 332 may include circular portion 334 and concave portions 336 or various shapes Any shape in shape is with the piston portion needed for being formed.One or more ribs 338 be located at each piston portion 310 between with It is formed in the multiple holes 308 in the loop section 312 of wobble-plate 302.

The second half 318b of mould 318 include sunk part 340 for accommodating bearing 206 and for as described above every From the center cavity 328 of cam 202.

Once bearing 206 is located in the first half 318a of mould 318, the first and second half 318a and 318b of mould 318 Then it is sealed together, as shown in Figure 19.The two halves of mould are sealed on the outer ring 224 of bearing 206.Inner space 341 Be by be included in the pit formed on outer ring 224, the bearing 206 of the rib of the first half 318a of pillar and mould 318 it is outer What circle 224 was limited.Depth for the sunk part of bearing 206 is slightly shallower than the depth of inner space, so that wobble-plate 302 The inwall of loop section produce the slightly overlapping or lip leant with the outermost edge of every one side of the outer ring 224 of bearing 206 342, so as to wobble-plate 302 further is fixed into cam/bearing assembly 200.

The second half 318b of mould 318 include the cast gate 344 being molded for each piston portion of wobble-plate 302.Melting Plastic material be injected into the inner space 341 of mould 318 to form wobble-plate 302.It is right immediately after cooling plastic material The two halves 318a and 318b of mould are unsealed and are projected wobble-plate/bearing assembly 300 from mould 318.

As discussed in the background section, as shown in Fig. 3 A-6B, when entrance of the prior art and go out Mouth valve is placed in when in the valve seat of valve chest 140, and effective sealing area that it has is limited.

Reference picture 20A-21B, it illustrates improved inlet valve 142.Inlet valve 142 is included by suitable material, such as rubber The single structure that glue is made.Inlet valve 142 includes central mounting portion 158, such as pillar and the first end positioned at pillar 158 Around the elastic packing forming part 159 of pillar 158.Pillar 158 also includes thering is constant diameter D_miLongitudinally central portion 163 And the second opposite end 165 of pillar 158 in the hole of the room 146 of valve chest 140 can be contained in.The second of pillar 158 is relative End 165 includes tapered segment 167, and it has first diameter bigger than the constant diameter of center section and decrement is extremely equal to or small In the diameter of the constant diameter of center section.First diameter so as to generate the shoulder around one end of center section, to work as post Against the opposite side of valve chest 140 when son 158 is by the hole.Which ensure that in inlet valve during running 142 in valve chest 140 It is held in place.

Reference picture 21A and 21B, shown inlet valve 142 are installed in the valve seat 152 of the room 146 of valve chest 140.Bullet Property part 159 include core 169 and periphery release area 160 or lip.The first edge in shown periphery release area 160 160a is on the position loosened, i.e. in the state being assembled in valve seat where preceding valve nature, and shown second edge On positions of the 160b then in slight curvature or sealing, i.e. at this moment the piston of barrier film is just moving to the room for being provided with inlet valve 142 Limiting or entirely prevent this flow of fluid in 146.When periphery release area 160 bends substantially or carried away valve seat 152, enter Mouth valve 142 is on release position, to allow the flow of fluid from inlet 112 to room 146.

The material for removing formation " step " part in the valve of prior art is generated from core 169 to periphery release area 160 cross section successively decreased, so that periphery release area 160 is included on the first side of elastic part 159 and with including even The mathematics of continuous function or the circle of cross-sectional profiles or sloping portion 171, are additionally included on the second side of elastic part 159 the Two it is circular or it is inclined sealing or seating portion 177, wherein second seating portion 177 also have include the mathematics of continuous function or Cross-sectional profiles.This circular or inclined edge surface designs the slight curving band to form sealing area rather than one Line, so as to the bigger effective sealing area 173 of the inlet valve of producing ratio prior art and reduce sealing inconsistency.This is effective Sealing area 173 be by the first circumference 173a, i.e., periphery release area 160 be in contact with valve seat positioned at innermost radial direction position The circumference and the second circumference 173b put, i.e., the outmost radial direction position positioned at periphery release area being in contact with valve seat in valve What the circumference put was defined.The circumferential bands or ring extended between the first and second circumference 173a and 173b are effectively sealing Region 173.

Additionally, reference picture 21B, the rounded edges are in the mill moved to sealing the mould split line 175 of mould The non-critical areas of valve of the performance without influence, so as to reduce or eliminate the source of sealing inconsistency.

Reference picture 22A-22B, it illustrates improved outlet valve 144.Outlet valve 144 is included by suitable material, such as rubber The single structure that glue is made.Outlet valve 144 includes central mounting portion 168, such as pillar, the first end positioned at pillar 168 Elastic packing forming part 169 and second posts 189 of the 168a around pillar 168.Pillar 168 also includes thering is constant diameter Second phase of the pillar 168 housed in the longitudinally central portion 175 of Dmo and the recess 166 that can be formed outside valve chest 140 Opposite end 168b.By outlet valve 144, radially (or laterally) is fixed in recess 166 for the center section 175 of pillar 168, and from The pillar 113 that the ground 116 of the downstream chamber 114 of top cover 102 extends is abutted or withstands the second pillar 189 of outlet valve 144 with volume Other places (or vertically) stationary exit valve 144 vertically, so that it is determined that outlet valve 144 is in valve seat 162 during the operation of pump It is held in place.

Alternatively, the second opposite end 168b of pillar 168 includes tapered segment 179, and it has equal to center section 175 First diameter of constant diameter and into decrement to less than center section 175 constant diameter diameter.

Reference picture 23A, 23B and 24, shown outlet valve 144 is installed in the valve seat outside the room 146 of valve chest 140 In 162.Elastic part 169 includes core 181 and periphery release area 170 or lip.Shown lip 170 is in somewhat curved On bent or sealing position, i.e., now the piston of barrier film moves out the room 146 for being provided with outlet valve 144 thereon with limitation or complete Prevent flow of fluid entirely.When periphery release area 170 is bent substantially to be carried away valve seat 162, outlet valve 144 is in release position On allowing the flow of fluid from room 146 to downstream chamber 114.The annular for forming " step " part is removed in the valve of prior art Partial material causes that the cross section of the material near periphery release area 170 is thinner, and the thinner cross section includes being located at elasticity Circular edge on the inner surface of part 169 or inclined seating portion 183 and with the mathematics including continuous function or transversal Facial contour.This circular or inclined edge surface design is bent to form the band rather than a line of sealing area, so as to produce The life effective sealing area 185 bigger than the outlet valve of prior art simultaneously reduces sealing inconsistency.This effective sealing area 185 is by the first circumference 185a, i.e., the circle in innermost radial position being in contact with valve seat in periphery release area 170 Week and the second circumference 185b, i.e., valve be in contact with valve seat in the outmost radial position in periphery release area 170 Circumference defined.The circumferential bands or ring extended between the first and second circumference 185a and 185b are effective sealing area 185。

Additionally, reference picture 23B, rounded edges are in the mill moved to sealing the mould split line 187 of mould Can be without the non-critical areas of the valve of influence, so as to further reduce or eliminate the source of sealing inconsistency.

Due to bigger effective sealing area and the sealing inconsistency for reducing, improved entrance and exit valve design Combination improve the function and efficiency of pump.

Improved membrane pump a kind of according to an embodiment of the invention is generally comprised can resist the load that applies thereon Cam and bearing assembly and wobble-plate and bearing assembly, thus eliminate or reduce displacement that cam occurs from bearing or wobble-plate from The displacement that bearing occurs.Compared with the pump of prior art, this can play a role and is up to increasing the run time and reliability of pump 10 times or more high magnification numbe.Additionally or can alternatively, the Curve guide impeller of the entrance and exit check-valves of valve chest be by using valve Seat increases effective sealing area and generates better seal uniformity.Because it eliminate or reduces leakage and/or adverse current Occur, therefore which increases the efficiency of pump, and keep simultaneously by the flow efficiency high of pump.

Description above proposes many concrete details, and it provides the thorough understanding to various embodiments of the present invention. It is obvious to those skilled in the art that some or all of feelings that can be in not possessing these details Put into practice under condition in various embodiments disclosed herein.In other cases, not herein to those skilled in the art The component known is described in detail in order to avoid unnecessarily obscuring the present invention.Even if it is to be understood that being explained in description above The many features and advantage of various embodiments have been stated, but the present invention is only together with the details of the 26S Proteasome Structure and Function of various embodiments It is illustrative.However, also other embodiment can be constructed using principle of the invention and spirit.Therefore, this application is intended to Any modification of the invention or modification.

In order to explain claim of the invention, it is clearly intended that unless refer to specific art in the claims Language " mode being used for ... " or " the step of being used for ... " is outward, will not call that United States Code No. 35 is compiled the 6th section the 112nd The regulation of bar.

Claims (19)

1. a kind of membrane pump, it includes waving board component and the motor with rotation driving axle, and the board component that waves includes：

Bearing with outer ring and inner ring, the outer ring provides the cylindric appearance for wherein defining multiple independent pits Face, each pit is included in the depressed part in the outer surface of the cylindrical shape, and the pit separates along the circumference of the outer surface, and And the pit is arranged between the axially opposite edge of the outer surface, and the pit with described in the outer surface The each axially-spaced at axially opposite edge；

The wobble-plate of the drive shaft is attached to through bearing, the wobble-plate has inner annular wall, wherein the wobble-plate is logical Cross the outer ring that injection moulding is fixed to the bearing, thus a part for the inner annular wall extend into it is the multiple Each of pit, abuts against the whole exterior face surface in the pit, wherein the wobble-plate is laterally being moved with rotation Fixed relative to the outer ring in dynamic.

2. pump according to claim 1, wherein the pump also includes being attached on the bearing cam of the drive shaft, The inner ring of wherein described bearing limits at least one recess, wherein the cam is fixed in being included in the inner ring of the bearing The plastic cam component through injection moulding so that a part for the cam member extends at least one recess, Wherein described cam member is fixed relative to the inner ring of the bearing, and wherein described cam member is attached to the drive Moving axis causes that it is fixed relative to the drive shaft.

3. pump according to claim 1, the membrane pump also includes valve module, and the valve module includes：

Valve plate with first surface and second surface, the first surface includes limiting the structure of multiple entrance valve seats, described Second surface includes limiting the structure of multiple outlet valve seats, and each entrance and exit valve seat has the structure periphery in restriction opening Arrangement seat surface；

Multiple outlet valves, each outlet valve has pillar and is radially extended from the pillar and surround the sealing of the pillar Forming part；And

Multiple inlet valves, each inlet valve has pillar and is radially extended from the pillar and surround the sealing of the pillar Forming part,

Wherein described outlet and inlet valve respectively have cross-sectional profiles, its neighboring for including being located at the sealing forming part Inclined seating portion, inclined the seating portion can optionally with described in corresponding valve seat seat surface engagement with shape Into effective sealing area, so that the opening of the excessively described respective valve seat of anti-fluid flow.

4. pump according to claim 3, wherein effective sealing area is defined as in the first circumference and the second circumference Between region, be formed as band, first circumference is located at the first position on the neighboring, second circumference From the first position it is spaced inward so that first circumference be more than second circumference, the valve is in the first circumference Thickness is less than thickness of the valve in the second circumference.

5. pump according to claim 3, the wherein opening of each valve seat include limiting the structure in multiple holes.

6. pump according to claim 3, wherein the first surface of the valve plate includes limiting the structure of multiple rooms, its It is indoor that middle inlet valve seat is located at each.

7. pump according to claim 3, wherein the pump also includes the protecgulum with inlet and downstream chamber, wherein each institute The opening of entrance valve seat and inlet's communication of the protecgulum are stated, and it is each described in the outlet valve seat The downstream chamber's communication being open with the protecgulum.

8. pump according to claim 7, wherein each in the outlet valve can optionally in release position and close Envelope switches between position, in the release position, described inclined the seating portion of the outlet valve not with the outlet valve Seat during seat surface engages and enables fluid to flow through the opening to the downstream chamber of the protecgulum, and in the sealing position Put, inclined the seating portion and the outlet valve seat seat surface engage and flow through the opening to limit fluid.

9. pump according to claim 7, wherein each in the inlet valve can optionally in release position and close Envelope switches between position, in the release position, described inclined the seating portion of the inlet valve not with the inlet valve Seat seat surface engage and enable fluid to flow through the opening from the inlet of the protecgulum, and in the sealing station On, inclined the seating portion and the entrance valve seat seat surface engage and flow through the opening to limit fluid.

10. a kind of wobble-plate and bearing assembly, the wobble-plate and bearing assembly include：

Bearing with outer ring and inner ring, the outer ring provides the cylindric appearance for wherein defining multiple independent pits Face, each pit is included in the depressed part in the outer surface of the cylindrical shape, and the pit separates along the circumference of the outer surface, and And the pit is arranged between the axially opposite edge of the outer surface, and the pit with described in the outer surface The each axially-spaced at axially opposite edge；And

Plastic rocker plate with the center ring for housing bearing wherein；

Wherein described wobble-plate is fixed to the outer ring of the bearing by injection moulding so that of the center ring Each in the pit point is extended into, the whole exterior face surface in the pit is abutted against, so that described wave Plate is fixed in moving axially and in rotation relative to the outer ring.

11. wobble-plates according to claim 10 and bearing assembly, wherein the face of the inner ring of the bearing includes limit Determine the structure of groove, the groove be used for for it is described wave plate injection moulding wave the default position of board mold and releasedly The fixation bearing.

12. wobble-plates according to claim 10 and bearing assembly, wherein the inner annular wall of the center ring wobble-plate At least one of first edge and second edge include keep lip, and wherein it is described holding lip with described in the bearing The corresponding outside of outer ring leans, so that the outer ring axial restraint of the wobble-plate relative to the bearing.

13. wobble-plates according to claim 10 and bearing assembly, the cam including the plastics of injection moulding are consolidated It is scheduled in the inner ring of the bearing, so that the cam is described interior relative to the bearing in moving axially and in rotation Circle is fixed.

14. wobble-plates according to claim 13 and bearing assembly, wherein the annular wall bag of the inner ring of the bearing The structure for limiting one or more recesses is included, wherein the annular wall of the recess and the cam is engaged, so as to prevent Cam is stated to be rotated relative to the inner ring of the bearing.

15. wobble-plates according to claim 13 and bearing assembly, wherein the face of outside first of the cam and outside the At least one of two faces include annular retaining lip, and the annular retaining lip is corresponding to the inner ring of the bearing outer Face leans, wherein the holding lip prevents the cam from being moved axially relative to the inner ring of the bearing.

A kind of 16. membrane pumps, the membrane pump includes：

Housing, it includes protecgulum and bonnet, wherein inlet of the protecgulum including entrance and the entrance communication, Outlet and the downstream chamber with the outlet communication；

Motor sub-assembly, it includes motor and rotatable drive shaft, wherein the rotatable drive shaft is extended through described The structure of opening is limited in bonnet；

The cam and bearing assembly of the drive shaft are attached to, the cam and bearing assembly include cam and bearing, described Bearing has outer ring and inner ring, and the outer ring provides cylindrical outer surface and limits multiple pits, and each pit is included in the circle Depressed part in the outer surface of tubular, the pit separates along the circumference of the outer surface, and the pit be arranged at it is described Between the axially opposite edge of outer surface, and the pit is each with the described axially opposite edge of the outer surface Bar axially-spaced, the cam is included in the plastic cam of the injection moulding fixed in the inner ring of the bearing, so that described convex Wheel is fixed relative to the inner ring of the bearing, and wherein described cam is attached to the drive shaft with relative to the drive Moving axis is fixed；

The wobble-plate for being fastened to the outer ring of the bearing and being fixed relative to the outer ring of the bearing, the wobble-plate includes multiple Piston structure, also with inner annular wall, wherein the wobble-plate injection moulding is to the bearing so that the one of the inner annular wall Each of the multiple pit is extended partially into, the whole exterior face surface in the pit is abutted against, to limit State rotation of the wobble-plate relative to the outer ring；

The barrier film of the plate face of the wobble-plate is actively attached to, wherein the barrier film and the multiple piston structure form multiple Piston；And

Valve module, it includes multiple chambers and multiple check-valves, wherein in each chamber and the inlet and the downstream chamber Each selectively be in fluid communication,

Wherein described cam and bearing assembly are suitable to be converted into the rotary motion of the drive shaft nutating fortune of the wobble-plate It is dynamic, so that each piston engages the chamber of the valve module in order, thus force fluid to move back and forth from the entrance Room flows into the chamber and flows out the chamber.

17. pumps according to claim 16, wherein the annular wall of the inner ring of the bearing includes limiting one or many The structure of individual recess, wherein the annular wall of the recess and the cam is engaged, so as to prevent the cam relative to institute State the inner ring rotation of bearing.

18. pumps according to claim 16, wherein the face of the inner ring of the bearing includes limiting the structure of groove, institute State groove for for it is described wave plate injection moulding wave the default position of board mold and releasedly fix the cam with Bearing assembly.

19. pumps according to claim 16, wherein at least one in the face of outside first of the cam and outside second face Including annular retaining lip, annular retaining lip outside corresponding to the inner ring of the bearing leans, wherein the guarantor Holding lip prevents the cam from transverse shifting occurring relative to the inner ring of the bearing.