CN107882983A - A kind of piston structure - Google Patents
A kind of piston structure Download PDFInfo
- Publication number
- CN107882983A CN107882983A CN201610854710.XA CN201610854710A CN107882983A CN 107882983 A CN107882983 A CN 107882983A CN 201610854710 A CN201610854710 A CN 201610854710A CN 107882983 A CN107882983 A CN 107882983A
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- CN
- China
- Prior art keywords
- connector
- annular
- piston rod
- claw
- sealing ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/04—Draining
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/10—Connection to driving members
- F16J1/12—Connection to driving members with piston-rods, e.g. rigid connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J7/00—Piston-rods
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sealing Devices (AREA)
- Actuator (AREA)
Abstract
The present invention relates to a kind of piston structure, it includes piston rod connector, piston rod connector includes connector, sealing ring and claw structure, sealing ring is sheathed on the first end of connector, claw structure is arranged at the second end of connector, it is and relative with sealing ring, sealing ring has ring packing body and annular sealing lip, the first end of annular sealing lip is fixed on the outside of ring packing body, there is gap between second end of annular sealing lip and ring packing body, piston rod connector further includes snap-in structure, snap-in structure fixed seal ring is in the first end of the connector.The piston rod connector of the application, in connector, avoids that the problem of sealing ring departs from occurs when using by snap-in structure fixed seal ring.
Description
Technical field
The present invention relates to a kind of piston technical field, more particularly to a kind of piston structure.
Background technology
Piston rod connector common at present has connector, sealing ring and claw structure, and usual sealing ring is sheathed on company
One end of junctor, claw structure are arranged at the other end of connector.Snap-in structure is not provided between sealing ring and connector, causes to live
Stopper rod connector is moved back and forth when the plunger shaft of the pump housing, and easily because of use for a long time elastic fatigue occurs for sealing ring, is sealed
Circle easily departs from from connector.
The content of the invention
For deficiency of the prior art, it is an object of the invention to provide a kind of piston structure.
In order to solve the above-mentioned technical problem, this application discloses a kind of piston structure, it is characterised in that including：Piston rod
Connector, including connector, sealing ring and claw structure, the sealing ring is sheathed on the first end of the connector, described
Claw structure is arranged at the second end of the connector, and relative with the sealing ring, and the sealing ring has ring packing
Body and annular sealing lip, the first end of the annular sealing lip is fixed on the outside of the ring packing body, described
There is gap between second end of annular sealing lip and ring packing body, the piston rod connector further includes snap-in structure,
The snap-in structure fixes the sealing ring in the first end of the connector.
According to the embodiment of the application, the end face of the second end of connector described above is arc groove, described
The first end of multiple claws of claw structure connects the second end of the connector, and the inner side of the multiple claw has respectively
Arc groove, and grab is formed respectively in the second end of the multiple claw, the multiple grab is corresponded in the connector
Mandrel line.
According to the embodiment of the application, the bottom surface of the second end of above-mentioned connector is plane, the claw structure
With multiple claws, the first end of the multiple claw connects the second end of the connector, and its second end has card respectively
Hook, the multiple grab correspond to the central axis of the connector, each grab of the second end of the corresponding connector
Surface be inclined-plane.
According to the embodiment of the application, above-mentioned claw structure further includes annular engaging body, and the annular engaging is originally
The medial surface of body has annular male member, and the annular male member is arranged at the annular slot of the second end of the connector, institute
The first end for stating multiple claws is arranged at the annular engaging body, and annular space arranges, and its second end is toward away from annular snap
Close the direction extension of body.
According to the embodiment of the application, the outer surface of the first end of above-mentioned connector has annular slot；Institute
Stating snap-in structure includes loop fasteners, and the loop fasteners are arranged at the inner surface of the ring packing body, the annular
Seal body is arranged at the outer surface of the first end, and the loop fasteners are arranged at the annular slot.
According to the embodiment of the application, above-mentioned engaging projection includes fixed column and engaging protuberances, and the fixed column is set
The closing top surface of the ring packing body is placed in, the engaging protuberances are arranged at one of the fixed column away from the closing top surface
End, the external diameter of the engaging protuberances are more than the external diameter of the fixed column, and the fixed column is described positioned at the described first engaging hole
Engaging protuberances are positioned at the described second engaging hole.
According to the embodiment of the application, above-mentioned ring packing body is sheathed on the outer surface of the first end；
The snap-in structure includes block piece, and the block piece is bolted in the first end of the connector, and by laser welding in
The first end of the connector, and cover the gap.
According to the embodiment of the application, above-mentioned block piece has baffle plate and engaging post, and the engaging post is arranged at institute
The side of baffle plate is stated, the engaging post is bolted in the screwed hole of the first end of the connector, between the baffle plate masking is described
Gap.
According to the embodiment of the application, the external diameter of above-mentioned baffle plate is more than the external diameter of the ring packing body, and small
External diameter in the second end of the annular sealing lip.
According to the embodiment of the application, there is lateral breach between above-mentioned baffle plate and annular sealing lip, it is described lateral
Breach connects the fluid passage that the gap forms bending.
Compared with prior art, the application can be obtained including following technique effect：
The piston rod connector of the application has various structures, number of parts used in each piston rod connector
It is few, it is simple in construction, make simple.The sealing ring of one of which piston rod connector is arranged at the ring of connector by loop fasteners
Shape neck, by engaging, projection is arranged at connecting hole to the sealing ring of another piston rod connector and loop fasteners are arranged at connection
The dual snap fit of the annular slot of body, the sealing ring of this two kinds of piston rod connectors are stably fixed to the first of connector
End, piston rod connector is avoided to move back and forth the problem of sealing ring is fallen off when plunger shaft.
The block piece of another piston rod connector is assembled in connector by screw connection manner, then is stopped by laser welding
Part on connector, so making block piece be firmly fixed to connector, baffle seal circle and reaching prevents sealing ring departs from from connecting
Junctor.Furthermore the gap of the baffle plate masking sealing ring of block piece, avoids fluid from directly impacting sealing ring, and then avoid sealing ring
Annular sealing lip damage.
The arc groove of the end face of the second end of the connector of the piston rod connector of the piston structure of the application and every
The arc groove of the inner side of one claw, suitable to be connected with the piston rod with spherical elevation, piston rod is matched somebody with somebody with piston rod connector
Conjunction requires low, and piston rod is easily assembled in piston rod connector, improves the adaptability of piston structure, and piston rod can be pushed away equably
Piston bar connector.
Brief description of the drawings
Fig. 1 is the profile of the piston structure of the application first embodiment.
Fig. 2 is the profile of the piston rod connector of the application first embodiment.
Fig. 3 is the first use state figure of the piston structure of the application first embodiment.
Fig. 4 is the second use state figure of the piston structure of the application first embodiment.
Fig. 5 is the partial enlarged drawing of Fig. 4 a-quadrant.
Fig. 6 is the 3rd use state figure of the piston structure of the application first embodiment.
Fig. 7 is the profile of the piston rod connector of the application second embodiment.
Fig. 8 is the profile of the piston rod connector of the application 3rd embodiment.
Fig. 9 is the use state figure of the piston rod construction of the application 3rd embodiment.
Figure 10 is the partial enlarged drawing of Fig. 9 B area.
Figure 11 is the profile of the piston structure of the application fourth embodiment.
Figure 12 is the profile of the piston rod connector of the embodiment of the application the 5th.
Figure 13 is the profile of the piston rod connector of the application sixth embodiment.
Embodiment
Multiple embodiments of the application, as clearly stated, the details in many practices will be disclosed with schema below
It will be explained in the following description.It should be appreciated, however, that the details in these practices is not applied to limit the application.Also
It is to say, in some embodiments of the application, the details in these practices is non-essential.In addition, for the sake of simplifying schema,
Some known usual structures will illustrate it in a manner of simply illustrative in the drawings with component.
On its " first " used herein, " second " etc., the meaning of order or cis-position is not especially censured, also non-use
To limit the application, it is just for the sake of difference with the component of constructed term description or operation.
Referring to Fig. 1, it is the profile of the piston structure 1 of the application first embodiment；As illustrated, the present embodiment carries
For a kind of piston structure 1, piston structure 1 includes piston rod connector 10 and piston rod 11, and piston rod connector 10 includes connection
Body 101, sealing ring 102, snap-in structure and claw structure 103, connector 101 include first end 1011 and the second end
1012, sealing ring 102 is sheathed on first end 1011, and by snap-in structure fixed seal ring 102 in first end 1011.Card
Pawl structure 103 is arranged at the second end 1012, and has multiple claws 1031, one end connection the second end of multiple claws 1031
1012, the past the second end away from connector 101 of the second end 1012 of the other end from the connector 101 of multiple claws 1031
1012 direction extension.The end face 10121 of the second end 1012 of the connector 101 of the present embodiment has arc groove 10122,
The inner side of multiple claws 1031 has arc groove 10311 respectively, and forms grab respectively in the other end of multiple claws 1031
10312, the central axis of the corresponding connector 101 of grab 10312 of each claw 1031.Piston rod 11 has spherical elevation
111, the arc groove 10122 of end face 10121 and the arc groove 10311 of each claw 1031 accommodate spherical elevation 111, i.e.,
The bottom surface of the arc groove 10122 of end face 10121 and the arc groove 10311 of each claw 1031 and spherical elevation 111
The correspondence of surface 1111, when spherical elevation 111 is arranged at claw structure 103, the surface 1111 of spherical elevation 111 and the second end
The bottom surface of the arc groove 10122 of 1012 end face 10121 and the arc groove 10311 of each claw 1031 is bonded, increase
The adaptability of piston structure 1.
Also referring to Fig. 2, it is the profile of the piston rod connector 10 of the application first embodiment；As illustrated,
Middle part of the connector 101 of the piston rod connector 10 of the present embodiment with more connection first end 1011 and the second end 1012
1013, the external diameter of first end 1011 and the second end 1012 is less than the external diameter at middle part 1013, the first end of connector 101
1011 outer surface 10111 has annular slot 10112.There is the outer surface 10121 of the second end 1012 annular to engage
Groove 10122.
Sealing ring 102 is sheathed on the outer surface 10111 of first end 1011, and sealing ring 102 has ring packing body
1021 and annular sealing lip 1022, ring packing body 1021 has closing top surface 10211 and is arranged at closing top surface 10211
Annular sidewall 10212, snap-in structure includes loop fasteners 10213, and loop fasteners 10213 are arranged at annular sidewall 10212
Inner side.There is annular sealing lip 1022 first end 1022a and the second end 1022b, its first end 1022a to be arranged at ring packing
The outside of the annular sidewall 10212 of body 1021, and be fixing end；Its second end 1022b is free end, annular sealing lip
There is gap 1023, annular sealing lip between 1022 the second end 1022b and the annular sidewall 10212 of ring packing body 1021
1022 the second end 1022b external diameter is more than the external diameter at the middle part 1013 of connector 101.When the ring packing sheet of sealing ring 102
When body 1021 is sheathed on the outer surface 10111 of first end 1011, the loop fasteners 10213 of sealing ring 102 are mounted on connection
The annular slot 10112 of body 101.Sealing ring 102 is arranged at the snap fit of annular slot 10112 by loop fasteners 10213,
Firmly fixed seal ring 102 is in the first end 1011 of connector 101.
Claw structure 103 is arranged at the second end 1012 of connector 101, and relative with sealing ring 102.Claw structure
103 also include annular engaging body 1032, and the medial surface 10321 of annular engaging body 1032 has annular male member 10322, multiple
The first end 1031a of claw 1031 is connected to annular engaging body 1032, and annular space arranges, its second end 1031b
Extend toward the direction that body 1032 is engaged away from annular, and form free end, the second end 1031b of multiple claws 1031 is formed
External diameter be more than sealing ring 102 annular sealing lip 1022 the second end 1022b external diameter.When claw structure 103 is arranged at
During the second end 1012 of connector 101, annular engaging body 1032 is arranged at the outer surface 10121 of the second end 1012,
The annular male member 10322 of annular engaging body 1032 is arranged in annular slot 10122, and multiple claws 1031 are located at connector
The side of 101 the second end 1012.Claw structure 103 is arranged in the second end of connector 101 because of its annular male member 10322
1012 annular slot 10122, effectively prevents claw structure 103 to be disconnected body 101.
Above-mentioned connector 101 is metal material, and above-mentioned claw structure 12 is elastic construction, multiple claws 122 can gather and
Open, the material of above-mentioned sealing ring 102 and claw structure 103 uses elastic material, and elastic material can be PTFE, PPSU, polyethers
Ether ketone (PEEK), modified polyetheretherketonefiber, PE, PP or PVC.Sealing ring 102 and the flexible of claw structure 103.The application's
The preparation method of piston rod connector 10, it is first that mold insert carries out injection molding or compression molding with connector 101, forms claw knot
Structure 103 is in the second end 1012 of connector 101.Sealing ring 102 is sheathed on the outside of the first end 1011 of connector 101 again
The fixed form of surface 10111, sealing ring 102 and claw structure 103 and connector 101 has been stated clearly in above-mentioned, in this no longer
Repeat.The preparation method that the application provides mainly before sealing ring 102 is assembled in the first end 1011 of connector 101, prior to
The injection molding of the second end 1012 of connector 101 or compression molding claw structure 103, can so avoid injection molding or molding
The high temperature of shaping influences the performance of sealing ring 102.
Also referring to Fig. 3 to Fig. 6, it is the first use state figure of the piston structure of the application first embodiment,
The partial enlarged drawing of the a-quadrant of two use state figures, the 3rd use state figure and Fig. 4；As illustrated, above-mentioned piston rod connector
10 are arranged at the plunger shaft 21 of the pump housing 2, and plunger shaft 21 has accommodating section 21a and the displacement section connected with accommodating section 21a
21b, housing section 21a has the first opening 211 and the second opening 212, and the diameter of the first opening 211 is more than the second opening 212
Diameter, the space for making accommodating section 21a is gradually-reducing shape.Displacement section 21b has a displacement passage 213, and the one of displacement passage 213
The opening 212 of end connection second, its diameter are identical with the diameter of the second opening 212.
Piston rod connector 10 is first arranged at piston rod 11, and the spherical elevation 111 of piston rod 11 is arranged at claw structure
103, i.e., between multiple claws 1031.Now piston rod connector 10 is arranged at accommodating section 21a, its direction of sealing ring 102
Second opening 212, its claw structure 103 towards first opening 211, as shown in Figure 4.Piston rod 11 promotes piston rod connector
10, piston rod connector 10 enters displacement section 21b displacement passage 213.When piston rod connector 10 enters displacement passage 213
When, the second end 1022b of the annular sealing lip 1022 of sealing ring 102 external diameter is more than the internal diameter of displacement passage 213, and annular is close
Second end 1022b of envelope lip 1022 is connected to the side wall 2131 of displacement passage 213.When fluid enters displacement passage from the pump housing 2
When 213, fluid flows into the gap 1023 between the second end 1022b of ring packing body 1021 and annular sealing lip 1022
Body promotes the second end 1022b of annular sealing lip 1022, and the second end 1022b of annular sealing lip 1022 is connected to position
The side wall 2131 in Mobile Communication road 213.Piston rod connector 10 is moved back and forth in displacement passage 213, annular sealing lip 1022
Second end 1022b is persistently connected to the side wall 2131 of displacement passage 213, makes the second end 112b and the position of annular sealing lip 1022
Seamless between the side wall 2131 in Mobile Communication road 213, fluid will not be from the side wall 2131 of annular sealing lip 1022 and displacement passage 213
Between leak, displacement passage 213 is fully sealed.
The external diameter that second end 1031b of multiple claws 1031 of claw structure 103 is formed is more than the interior of displacement passage 213
Footpath, when piston rod connector 10 enters displacement passage 213, because claw structure 12 is elastic construction, the of multiple claws 1031
Two end 1031b gather inside, between the spherical elevation 111 of piston rod 11 is arranged at multiple claws 1031, the table of spherical elevation 111
It is close to the arc groove 10122 and each claw 1031 of the end face 10121 of the second end 1012 of connector 101 in face 1111
Arc groove 10311 bottom surface, when such piston rod 11 promotes piston rod connector 10, the spherical elevation 111 of piston rod 11
The end face 10121 of the second end 1012 of connector 101 is equably promoted, avoids piston rod connector 10 in displacement passage 213
Bias internal, and allow piston rod connector 10 to be smoothly displaced into displacement passage 213.When piston rod connector 10 will be opened toward second
When mouth 212 moves, multiple grabs 10312 of multiple claws 1031 are connected to the surface 1111 of the spherical elevation 111 of piston rod 11,
It is close to the table of the spherical elevation 111 of piston rod 11 positioned at the bottom surface of the arc groove 10311 of each top of grab 10312
Face 1111, the spherical elevation 111 of such fixed piston rod 11 prevent piston rod 11 from pulling piston rod to connect between multiple claws 1031
During joint 10, the spherical elevation 111 of piston rod 11 departs between multiple claws 1031.
Referring to Fig. 7, it is the profile of the piston rod connector 10 of the application second embodiment；As illustrated, this reality
The piston rod connector 10 of example is applied with the piston rod connector difference of a upper embodiment to be, the connector 101 of the present embodiment
The centre of first end 1011 has connecting hole 10113, and connecting hole 10113 has the first engaging hole 10113a and connection first
Engage hole 10113a the second engaging hole 10113b, the first engaging first ends of the hole 10113a from connector 101
1011 top surface 10114 extends toward middle part 1013, and the second engaging hole 10113b is located at the first connecting hole close to middle part 1013
Hole 10113a one end, the second engaging hole 10113b aperture are more than the first engaging hole 10113a aperture.
Snap-in structure further includes engaging projection 1023, and engaging projection 1023 is arranged at the ring packing body of sealing ring 102
The medial center of 1021 closing top surface 10211, engaging projection 1023 includes fixed column 10231 and engaging protuberances 10232, fixed
Post 10231 is arranged at closing top surface 10211, and engaging protuberances 10232 are arranged at the closing top surface away from ring packing body 1021
One end of 10211 fixed column 10231, the external diameter of engaging protuberances 10232 are more than the external diameter of fixed column 10231.When sealing ring 102
Ring packing body 1021 when being sheathed on the outer surface 10111 of first end 1011, engaging projection 1023 is arranged at engaging
Hole 10113, fixed column 10231 are located in the first engaging hole 10113a of connecting hole 10113, and engaging protuberances 11232 are positioned at card
Close in the second engaging hole 10113b in hole 10113, the external diameter of engaging protuberances 11232 is more than the interior of the first engaging hole 10113a
Footpath, prevent that engage projection 1123 departs from from connecting hole 10113.
Referring to Fig. 8, it is the profile of the piston rod connector 10 of the application 3rd embodiment；As illustrated, this reality
It is different from the structure of the sealing ring of above-described embodiment to apply the structure of sealing ring 102 of the piston rod connector 10 of example, the present embodiment
Snap-in structure includes block piece 104, thus the structure of the first end 1011 of the connector 10 of the present embodiment also with above-mentioned implementation
The structure of the first end of the connector of example is different.The centre of the first end 1011 of the connector 10 of the present embodiment has screw thread
Hole 10115.Sealing ring 102 is sheathed on the outer surface 10111 of first end 1011, and sealing ring 102 has ring packing body
1021 and annular sealing lip 1022, the first end 1022a of annular sealing lip 1022 be arranged at ring packing body 1021, its
Second end 1022b is free end, and has gap 1023 between ring packing body 1021, the second of annular sealing lip 1022
1022b external diameter is held more than the external diameter at the middle part 1013 of connector 101.Block piece 104 has baffle plate 1041 and is arranged at baffle plate
The engaging post 1042 of 1041 sides, engaging post 1042 have screw thread 10421 corresponding with screwed hole 10115, the card of block piece 104
The screwed hole 10115 of the screw thread 10421 of zygostyle 1042 and the first end 1011 of connector 101 is spirally connected, while to block piece 104
Baffle plate 1041 and connector 101 first end 1011 between carry out laser welding, allow block piece 104 to be fixed on connector 101
First end 1011, be also avoided that block piece 104 is disconnected body 101, while the baffle seal circle 102 of block piece 104, prevent
Sealing ring 102 is disconnected body 101.The external diameter of the baffle plate 1041 of block piece 104 is more than the ring packing body of sealing ring 102
1021 external diameter, and the external diameter of the second end 1022b less than annular sealing lip 1022, make the masking of baffle plate 1041 close positioned at annular
The gap 1023 sealed between lip 1022 and ring packing body 1021, bottom surface and the annular sealing lip 1022 of another baffle plate 1041
There is lateral breach 1024, lateral breach 1024 connects with gap 1023 and forms the fluid passage of bending between top.
Also referring to Fig. 9 and 10, it is the use state figure of the piston structure of the application 3rd embodiment and Fig. 9 B
The partial enlarged drawing in region；As illustrated, when piston rod connector 10 enters the displacement passage 213 of the plunger shaft 21 of the pump housing 2, stream
The other end of body from displacement passage 213 enters fashionable, the gap between ring packing body 1021 and annular sealing lip 1022
Baffle plate 1041 before 1023 guides fluid first toward the wall flow of displacement passage 213, and fluid flow to the outer rim of baffle plate 1041 and edge
Its outer rim is write from the gap 1023 that lateral breach 1024 enters between ring packing body 1021 and annular sealing lip 1022, and is reached
It to above-mentioned effect, can so avoid fluid from directly impacting the annular sealing lip 1022 of sealing ring 102, avoid causing annular close
Envelope lip 1022 damages.
The preparation method of the piston rod connector 10 of the present embodiment, sealing ring 102 are first sheathed on the first end of connector 101
The outer surface 10111 in portion 1011, now block piece 104 are mounted on the first end 1011 of connector 101, and to block piece
104 and connector 101 first end 1011 carry out laser welding, constant resistance part 104 is in connector 101.Finally with provided with
The connector 101 of sealing ring 102 and block piece 104 is that mold insert carries out injection molding or compression molding, formed claw structure 103 in
The second end 1012 of connector 101.
Figure 11 is referred to, it is the profile of the piston structure 1 of the application fourth embodiment；As illustrated, the present embodiment
Piston structure 1 and the piston structure difference of embodiment one be that piston rod 11 has convex portion 112, the top surface of its convex portion 112
1121 be plane, and the end face 10121 of the second end 1012 of the connector 101 of the top surface 1121 of corresponding convex portion 112 is plane.It is living
The bottom surface 1122 of the convex portion 112 of stopper rod 11 is inclined-plane, multiple grabs of the bottom surface 1122 of the convex portion 112 of corresponding piston rod 11
10312 surface 10313 is inclined-plane.When piston rod 11 pulls piston rod connector 10 to move, multiple claws 1031 it is multiple
Grab 10312 is connected to the bottom surface 1122 of the convex portion 112 of piston rod 11, multiple grabs of the bottom surface 1122 of corresponding convex portion 112
The bottom surface 1122 of the convex portion 112 of piston rod 11 is close on 1031 surface 10313, the convex portion 112 of such fixed piston rod 11 in
Between multiple claws 1031, when preventing that piston rod 11 from pulling piston rod connector 10, the convex portion 112 of piston rod 11 departs from multiple claws
Between 1031.
The end face 10121 of the second end 1012 of the connector 101 of the piston rod connector 10 of the present embodiment be plane and
The piston rod that the surface 10313 of multiple grabs 10312 can be applied to second embodiment to 3rd embodiment for the structure on inclined-plane connects
Joint 10, as shown in Figure 12 and 13.
In summary, the piston rod connector of the application has various structures, used in each piston rod connector
Number of parts is few, simple in construction, makes simple.The sealing ring of one of which piston rod connector is arranged at company by loop fasteners
The annular slot of junctor, by engaging, projection is arranged at connecting hole to the sealing ring of another piston rod connector and loop fasteners are set
The dual snap fit of the annular slot of connector is placed in, the sealing ring of this two kinds of piston rod connectors is stably fixed to connect
The first end of body, piston rod connector is avoided to move back and forth the problem of sealing ring is fallen off when plunger shaft.
The block piece of another piston rod connector is assembled in connector by screw connection manner, then is stopped by laser welding
Part on connector, so making block piece be firmly fixed to connector, baffle seal circle and reaching prevents sealing ring departs from from connecting
Junctor.Furthermore the gap of the baffle plate masking sealing ring of block piece, avoids fluid from directly impacting sealing ring, and then avoid sealing ring
Annular sealing lip damage.
The piston rod of the piston structure of the application uses spherical elevation, and spherical elevation is connected to the connection of piston rod connector
The arc groove of the inner side of the arc groove of the end face of the second end of body and each claw, piston rod and piston rod connector
Cooperation requires low, and piston rod is easily assembled in piston rod connector, improves the adaptability of piston structure, and piston rod can be equably
Promote piston rod connector.
The upper only presently filed embodiment, is not limited to the application.For those skilled in the art
For, the application can have various modifications and variations.All any modifications made in spirit herein and principle, it is equal
Replace, improve etc., it all should be included within the scope of claims hereof.
Claims (10)
- A kind of 1. piston structure, it is characterised in that including：Piston rod connector, including connector, sealing ring and claw structure, the sealing ring are sheathed on the first of the connector End, the claw structure are arranged at the second end of the connector, and relative with the sealing ring, and the sealing ring has Ring packing body and annular sealing lip, the first end of the annular sealing lip are fixed on the outer of the ring packing body Side, has gap between the second end of the annular sealing lip and ring packing body, the piston rod connector further includes card Structure is closed, the snap-in structure fixes the sealing ring in the first end of the connector.
- 2. piston structure according to claim 1, it is characterised in that the end face of the second end of the connector is arc Groove, the first ends of multiple claws of the claw structure connect the second end of the connector, the multiple claw it is interior Side has an arc groove respectively, and forms grab respectively in the second end of the multiple claw, described in the multiple grab is corresponding The central axis of connector.
- 3. piston structure according to claim 1, it is characterised in that the bottom surface of the second end of the connector is flat Face, the claw structure have multiple claws, and the first end of the multiple claw connects the second end of the connector, and it the Two ends have grab respectively, and the multiple grab corresponds to the central axis of the connector, the second end of the corresponding connector The surface of each grab in portion is inclined-plane.
- 4. the piston structure according to Claims 2 or 3, it is characterised in that the claw structure further includes annular engaging originally Body, the medial surface of the annular engaging body have annular male member, and the annular male member is arranged at the second end of the connector The annular slot in portion, the first end of the multiple claw is arranged at the annular engaging body, and annular space arranges, and it the Two ends extend toward the direction that body is engaged away from annular.
- 5. piston structure according to claim 4, it is characterised in that the outer surface tool of the first end of the connector There is annular slot；The snap-in structure includes loop fasteners, and the loop fasteners are arranged at the inner side of the ring packing body Surface, the ring packing body are arranged at the outer surface of the first end, and the loop fasteners are arranged at the annular Neck.
- 6. piston structure according to claim 5, it is characterised in that the centre of the first end of the connector has card Hole is closed, the snap-in structure further includes engaging projection, and the engaging projection is arranged at the medial center of the ring packing body, The ring packing body is arranged at the outer surface of the first end, and the engaging projection is arranged at the connecting hole.
- 7. piston structure according to claim 4, it is characterised in that the ring packing body is sheathed on the first end The outer surface in portion；The snap-in structure includes block piece, and the block piece is bolted in the first end of the connector, and leads to Laser welding is crossed in the first end of the connector, and covers the gap.
- 8. piston structure according to claim 7, it is characterised in that the block piece has baffle plate and engaging post, described Engaging post is arranged at the side of the baffle plate, and the engaging post is bolted in the screwed hole of the first end of the connector, described Baffle plate covers the gap.
- 9. piston structure according to claim 8, it is characterised in that the external diameter of the baffle plate is more than the ring packing sheet The external diameter of body, and the external diameter at the second end less than the annular sealing lip.
- 10. piston structure according to claim 9, it is characterised in that there is side between the baffle plate and annular sealing lip To breach, the lateral breach connects the fluid passage that the gap forms bending.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854710.XA CN107882983A (en) | 2016-09-27 | 2016-09-27 | A kind of piston structure |
| PCT/CN2016/105768 WO2018058758A1 (en) | 2016-09-27 | 2016-11-14 | Piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854710.XA CN107882983A (en) | 2016-09-27 | 2016-09-27 | A kind of piston structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107882983A true CN107882983A (en) | 2018-04-06 |
Family
ID=61763266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610854710.XA Pending CN107882983A (en) | 2016-09-27 | 2016-09-27 | A kind of piston structure |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107882983A (en) |
| WO (1) | WO2018058758A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397381A (en) * | 2018-05-10 | 2018-08-14 | 惠州海卓科赛医疗有限公司 | A kind of medical plunger pump and its chamber structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3632575A1 (en) | 2018-10-02 | 2020-04-08 | Sulzer Mixpac AG | Reusable cartridge piston |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108397381B (en) * | 2018-05-10 | 2019-08-27 | 惠州海卓科赛医疗有限公司 | A kind of medical plunger pump and its chamber structure |
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| US11135372B2 (en) | 2018-05-10 | 2021-10-05 | Huizhou Hydro Caresys Medical Co., Ltd. | Medical plunger pump and cavity structure thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018058758A1 (en) | 2018-04-05 |
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Application publication date: 20180406 |
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