CN209875452U

CN209875452U - Piston structure, pumping system and engineering machinery

Info

Publication number: CN209875452U
Application number: CN201920814800.5U
Authority: CN
Inventors: 童政钢; 吴益辉; 杨新华
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2019-12-31
Anticipated expiration: 2029-05-31

Abstract

The utility model provides a piston structure, a pumping system and engineering machine tool, wherein, piston structure includes: the sealing device comprises a pressure plate, a piston body, a sealing body and a first sealing element; the pressing plate comprises a pressing part and an installation part, and the pressing part is connected with one end of the installation part; the piston body is sleeved on the mounting part; the sealing body is sleeved on the mounting part and clamped between the pressing part and the piston body; a first mounting groove is formed in the circumferential outer part of the mounting part; the first sealing element is arranged in the first mounting groove and clamped between the sealing body and the mounting portion. The utility model discloses a set up first sealing member, when sealing body and installation department compress tightly first sealing member, first sealing member plays the axial seal's of strengthening the piston body effect, and then has strengthened piston structure's whole sealed effect.

Description

Piston structure, pumping system and engineering machinery

Technical Field

The utility model relates to an engineering machine tool field particularly, relates to a piston structure, a pumping system and an engineering machine tool.

Background

Concrete in a pumping system of concrete pumping equipment is mainly pushed by a concrete piston, the working effect of the pumping system is directly influenced by the tightness of the concrete piston, generally, the sealing of the concrete piston is completed by an O-shaped ring on the end face, and the sealing ring fails when the connection is not tight or the concrete piston works, so that water leakage occurs.

Therefore, there is a need for a piston structure that can solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

To this end, a first aspect of the present invention provides a piston structure.

A second aspect of the present invention provides a pumping system.

A third aspect of the present invention provides an engineering machine.

In view of this, the first aspect of the present invention provides a piston structure, including: the sealing device comprises a pressure plate, a piston body, a sealing body and a first sealing element; the pressing plate comprises a pressing part and an installation part, and the pressing part is connected with one end of the installation part; the piston body is sleeved on the mounting part; the sealing body is sleeved on the mounting part and clamped between the pressing part and the piston body; a first mounting groove is formed in the circumferential outer part of the mounting part; the first sealing element is arranged in the first mounting groove and clamped between the sealing body and the mounting portion.

In this technical scheme, the circumference outside of installation department is equipped with first mounting groove, and first sealing member sets up in first mounting groove, and first sealing member clamp is located between seal and the installation department, and seal and installation department compress tightly first sealing member, and first sealing member has strengthened the sealed effect of axis of seal, has further strengthened sealed effect. Preferably, the mounting portion may be configured as a hollow structure having an opening at one end, reducing the overall weight of the piston structure, thereby improving the working efficiency of the pumping system.

Preferably, the quantity of first mounting groove is two, and the quantity of first sealing member is two, and a first mounting groove is close to the portion setting that compresses tightly, and another first mounting groove is close to the piston setting for the atress of seal is more even, and sealed effect is better, simultaneously because on two first sealing members acted on the seal in tandem, can help piston structure along axial motion's stability.

In addition, according to the utility model provides a piston structure among the above-mentioned technical scheme can also have following additional technical characteristics:

in any of the above technical solutions, preferably, the piston structure further includes: a projection; the bulge sets up on the first terminal surface of compressing tightly the portion, and the bulge is dentate structure, and the first terminal surface and the seal of compressing tightly the portion are inconsistent.

In this technical scheme, be provided with the bulge on the portion that compresses tightly, the bulge sets up on the plane (first terminal surface) that contacts with the piston body, the bulge is the protruding planar arch, when the portion that compresses tightly of clamp plate compresses tightly the seal, the bulge provides (along the installation department) axial and radial fixed power simultaneously, bellied bulge plays the effect of fixed seal, prevent at the in-process of piston structure work, the seal produces relative slip after the atress and between the portion that compresses tightly, and then reduce sealed effect, in addition, the radial fixed power that the bulge provided can further guarantee seal and installation department compress tightly first sealing member, thereby sealed effect has further been strengthened. Therefore, the bulge portion plays a role of enhancing the sealing effect of the piston structure. Wherein, the seal is the elastic sealing body to certain deformation can take place for the elastic sealing body when the atress for piston structure, when guaranteeing sealed effect, can also prevent seal structure's damage. Preferably, the projections are in a tooth-like structure (i.e., the tops of the projections are pointed, and the thickness of the projections gradually decreases in the direction of the projections), which can provide a greater fixing force and make the sealing of the sealing body more reliable. Specifically, the protruding portion may be a continuous toothed structure or a sawtooth structure, and the specific shape of the protruding portion is determined according to actual requirements.

Preferably, the protruding portion is circumferentially arranged around the mounting portion, and the number of the protruding portion may be plural. The bulge that sets up around installation department circumference can increase and apply radial fixed force on the seal, guarantees the packing force to first sealing member and/or second sealing member to strengthen sealed effect, in the same way, the quantity that increases the bulge can strengthen sealed effect equally.

In any of the above technical solutions, preferably, a second mounting groove is provided on a first end surface of the pressing portion; the piston structure further includes: a second seal member; the second sealing piece is arranged in the second mounting groove and clamped between the sealing body and the pressing portion.

In this technical scheme, be provided with at least one second mounting groove on the first terminal surface of portion that compresses tightly, be provided with the second sealing member in the second mounting groove, the second sealing member presss from both sides and locates between sealing body and the portion that compresses tightly, and sealing body and the portion that compresses tightly compress tightly the second sealing member, have further strengthened sealed effect.

Preferably, the second mounting groove is the annular mounting groove, and the second sealing member is ring packing, has guaranteed the packing force to the second sealing member, has strengthened sealed effect.

In the above technical solution, preferably, the first mounting groove is disposed around a circumference of the mounting portion; the second mounting groove is arranged on the first end surface around the mounting portion.

In the technical scheme, the second mounting groove is arranged on the first end surface in a surrounding mode; the first mounting groove is arranged around the circumference of the mounting part. The second mounting groove and the second sealing member that encircle the setting of installation department circumference can increase and apply radial fixed force on the seal to the sealed effect of reinforcing, the same reason, encircle the first mounting groove and the first sealing member that the setting of installation department circumference can strengthen the axial sealed effect of seal.

In any of the above technical solutions, preferably, a surface of the sealing body contacting the compression part is a first surface, a surface of the sealing body contacting the mounting part is a second surface, and a junction of the first surface and the second surface is provided with a chamfer; the seal is located on the circumference outside of installation department from the pot head that opens and be equipped with the chamfer.

In this technical scheme, the circumference outside of installation department is equipped with the second mounting groove, the second sealing member sets up in the second mounting groove, in order to make seal and installation department can compress tightly the second sealing member, the second sealing member is back in the second mounting groove of packing into, need the notch of partly protrusion second mounting groove of second sealing member, consequently the seal (be equipped with the through-hole on the seal) can produce the interference with the second sealing member at the in-process that the installation department was established to the cover, for the installation of the seal of convenience, the junction of first surface and second surface (seal and the surface that compresses tightly the looks contact is first surface, the seal is the second surface with the surface that the installation department contacted is provided with the chamfer, the seal is located on the installation department from the pot head that is equipped with the chamfer, be equipped with the transition face on the chamfer, wherein, the transition face can be the inclined plane, arc surface. When the sealing body is installed into the installation part through the side provided with the chamfer (transition surface), the front part (one end installed firstly) of the sealing body cannot interfere with the second sealing element, and the sealing body is convenient to install. In the installation process, the sealing body can be installed without large installation force, so that the installation process is simple.

In any of the above technical solutions, preferably, the piston structure further includes: a flange plate; the other end of the mounting part penetrates through the piston body to be connected with the flange plate, and the flange plate compresses one side of the piston body; the connecting rod is connected with the mounting part through a fastener.

In the technical scheme, the piston structure further comprises a flange plate, the other end of the mounting portion penetrates through the piston to be connected with the flange plate, the flange plate compresses one side of the piston body, the flange plate is connected with the mounting portion through a fastening piece, the piston body and the sealing body are axially mounted and compressed through the flange plate, and the flange plate is connected with the mounting portion through the fastening piece.

Preferably, the fastener is a screw, a threaded hole is formed in the end face of the mounting portion, and the screw is matched with the threaded hole to fixedly connect the flange plate with the mounting portion.

In any of the above technical solutions, preferably, the piston structure further includes: a guide ring; the guide ring is sleeved on the circumferential outer part of the piston body, and the guide ring is clamped between the sealing body and the flange plate.

In the technical scheme, the guide ring is sleeved on the outer side of the piston body, and the guide ring supports the outer side of the piston body, so that the stability of the piston structure in axial movement can be facilitated, the piston structure is free from large deviation, and eccentric wear caused by eccentricity of the piston structure can be avoided.

In any of the above technical solutions, preferably, the piston structure further includes: a dust ring and a positioning part; the dustproof ring comprises a fixed part and a dustproof part; the positioning part is arranged at the circumferential outer part of the flange plate, and a fixing groove with an opening facing the guide ring is arranged on the positioning part; in the fixed slot was located to the one end card of fixed part, the other end of fixed part was connected with the one end of dustproof portion, and the other end orientation of dustproof portion is kept away from the direction arch of flange axle line.

In this solution, the piston structure further includes: a dust ring and a positioning part; the dustproof ring comprises a fixed part and a dustproof part; the positioning part is arranged at the circumferential outer part of the flange plate, and a fixing groove with an opening facing the guide ring is arranged on the positioning part; in the fixed slot was located to the one end card of fixed part, the other end of fixed part was connected with the one end of dust guard, and the other end orientation of dust guard is protruding towards the direction of keeping away from the flange axis, and when piston structure carried out axial motion, the bulge of dust ring can play the effect of blockking to debris such as silt particle, and then can avoid hou mian seal and sealing member to receive the wearing and tearing of debris such as silt particle to the life of part has been improved.

A second aspect of the present invention provides a pumping system, comprising a piston structure according to any one of the above technical solutions.

The utility model provides a pumping system, including any one of the above-mentioned technical scheme piston structure, consequently have this piston structure's whole beneficial effect, no longer give consideration to here.

A third aspect of the present invention provides an engineering machine, including any one of the above technical solutions.

The utility model provides an engineering machine tool, including any one of the above-mentioned technical scheme pumping system, consequently have this pumping system's whole beneficial effect, no longer describe herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural view of a press plate according to the present invention;

fig. 2 shows a schematic structural view of another platen according to the present invention;

fig. 3 shows a schematic structural view of yet another platen according to the present invention;

figure 4 shows a schematic structural view of yet another platen according to the present invention;

fig. 5 shows a schematic structural view of a piston structure according to the invention;

fig. 6 shows a schematic structural view of another piston arrangement according to the invention;

fig. 7 shows a schematic structural view of a further piston structure according to the invention;

fig. 8 shows a schematic structural view of yet another piston structure according to the present invention;

fig. 9 shows a schematic structural view of yet another piston structure according to the present invention;

fig. 10 shows a schematic structural view of a sealing body according to the invention;

fig. 11 shows a schematic diagram of a pumping system according to the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 11 is:

1 piston structure, 10 pressing plates, 102 pressing parts, 104 mounting parts, 106 protruding parts, 108 first mounting grooves, 110 second mounting grooves, 12 first sealing parts, 14 second sealing parts, 16 piston bodies, 18 sealing bodies, 182 chamfers, 20 flange plates, 202 positioning parts, 22 fastening parts, 24 guide rings, 26 dust rings, 4 main oil cylinders, 6 conveying cylinders and 8 water tanks.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The piston structure 1, the pumping system and the working machine according to some embodiments of the present invention are described below with reference to fig. 1 to 11.

In an embodiment of the present invention, preferably, as shown in fig. 1 to 10, a piston structure 1 is proposed, comprising: a platen 10, a piston body 16, a seal body 18, and a first seal 12; the pressing plate 10 includes a pressing part 102 and a mounting part 104, the mounting part 104 is configured as a hollow cavity with openings at both ends, and the pressing part 102 is connected with one end of the mounting part 104; the piston body 16 is sleeved on the mounting part 104; the sealing body 18 is sleeved on the mounting part 104, and the sealing body 18 is clamped between the pressing part 102 and the piston body 16; a first mounting groove 108 is formed in the circumferential outer portion of the mounting portion 104; the first seal 12 is disposed in the first mounting groove 108, and the first seal 12 is interposed between the seal body 18 and the mounting portion 104 to seal the seal body 18. Preferably, the mounting portion 104 may be configured as a hollow structure having an opening at one end, reducing the overall weight of the piston structure 1, thereby improving the working efficiency of the pumping system.

In this embodiment, a first mounting groove 108 is formed in the circumferential outer portion of the mounting portion 104, the first sealing element 12 is disposed in the first mounting groove 108, the first sealing element 12 is sandwiched between the sealing body 18 and the mounting portion 104, the sealing body 18 and the mounting portion 104 press the first sealing element 12, and the first sealing element 12 enhances the axial sealing effect of the sealing body 18, so that the sealing effect is further enhanced.

Preferably, the number of the first mounting grooves 108 is two, the number of the first sealing members 12 is two, the first mounting grooves 108 are disposed near the compressing portion 102, and the other first mounting groove 108 is disposed near the piston, so that the sealing body 18 is more uniformly stressed and better in sealing effect, and meanwhile, because the two first sealing members 12 act on the sealing body 18 in tandem, the stability of the piston structure 1 in axial movement can be facilitated.

In an embodiment of the present invention, preferably, as shown in fig. 2, 3, 6 and 7, the piston structure 1 further includes: the projection 106; the protruding portion 106 is disposed on a first end surface of the pressing portion 102 in a protruding manner, the protruding portion 106 is a tooth-shaped structure, and the first end surface of the pressing portion 102 abuts against the sealing body 18.

In this embodiment, the pressing portion 102 is provided with a protruding portion 106, the protruding portion 106 is disposed on a plane (a first end surface) contacting with the piston body 16, the protruding portion 106 is a protrusion of the protruding plane, when the pressing portion 102 of the pressing plate 10 presses the sealing body 18, the protruding portion 106 provides an axial fixing force and a radial fixing force (along the mounting portion 104) at the same time, the protruding portion 106 functions to fix the sealing body 18, so as to prevent the sealing body 18 from sliding relative to the pressing portion 102 after being stressed during the operation of the piston structure 1, and further reduce the sealing effect, and further, the radial fixing force provided by the protruding portion 106 can further ensure that the sealing body 18 and the mounting portion 104 press the first sealing element 12, thereby further enhancing the sealing effect. Therefore, the projection 106 functions to enhance the sealing effect of the piston structure 1. Wherein, preferably, the sealing body 18 is an elastic sealing body, so that the elastic sealing body can deform to a certain extent when the piston structure 1 is stressed, and the sealing effect is ensured, and meanwhile, the damage of the sealing structure can be prevented. Preferably, the protrusions 106 are formed as teeth (i.e., the top of the protrusion is pointed and the thickness of the protrusion gradually decreases in the direction of the protrusion), which can provide a greater fixing force and make the sealing of the sealing body more reliable. Specifically, the protruding portion 106 may be a continuous tooth-shaped structure, and may also be a saw-tooth-shaped structure, and the specific shape of the protruding portion 106 is determined according to actual requirements.

Preferably, the protruding portion 106 is circumferentially disposed around the mounting portion 104, and the number of the protruding portions 106 may be plural. The circumferential projection 106 around the mounting portion 104 increases the radial retention force applied to the seal body 18 to ensure a compressive force on the first seal member 12 and/or the second seal member 14 to enhance the sealing effect, and similarly, the number of the projection 106 increases to enhance the sealing effect.

In an embodiment of the present invention, preferably, as shown in fig. 3, 4, 7 and 8, a second mounting groove 110 is provided on the first end surface of the pressing portion 102; the piston structure 1 further comprises: a second seal member 14; the second seal member 14 is disposed in the second mounting groove 110, and the second seal member 14 is interposed between the seal body 18 and the pressing portion 102.

In this embodiment, a second mounting groove 110 is provided on the first end surface of the pressing portion 102, a second sealing member 14 is provided in the second mounting groove 110, the second sealing member 14 is sandwiched between the sealing body 18 and the pressing portion 102, and the sealing body 18 and the pressing portion 102 press the second sealing member 14, so that the sealing effect is further enhanced.

Preferably, the second mounting groove 110 is an annular mounting groove, and the second sealing element 14 is an annular sealing ring, so that the pressing force on the second sealing element 14 is ensured, and the sealing effect is enhanced.

In an embodiment of the present invention, preferably, as shown in fig. 3, 4, 7 and 8, the first mounting groove 108 is disposed around the circumference of the mounting portion 104; the second mounting groove 110 is disposed on the first end surface around the mounting portion 104.

In this embodiment, the second mounting groove 110 is provided on the first end surface around the mounting portion 104; the first mounting groove 108 is disposed around the circumference of the mounting portion 104. The second mounting groove 110 and the second seal member 14 circumferentially disposed about the mounting portion 104 may increase the radial securing force applied to the sealing body 18 to enhance the sealing effect, and similarly, the first mounting groove 108 and the first seal member 12 circumferentially disposed about the mounting portion 104 may enhance the sealing effect in the axial direction of the sealing body 18.

In an embodiment of the present invention, preferably, the protrusion 106 is an end face sawtooth sealing structure, that is, the protrusion 106 is a sawtooth protrusion, and the sawtooth structure can provide a larger fixing force, thereby achieving a better sealing effect.

In an embodiment of the present invention, preferably, the protruding portion 106 is a protrusion with equal height (equal height protruding from the first end surface) in a ring shape, which can achieve better sealing effect.

In an embodiment of the present invention, it is preferable that the sealing body 18 is provided with a groove for engaging with the protrusion 106, and when the sealing body 18 is engaged with the pressing plate 10, the protrusion 106 is inserted into the groove, so as to achieve a better sealing effect.

In an embodiment of the present invention, preferably, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8 and fig. 10, a surface of the sealing body 18 contacting the pressing portion 102 is a first surface, a surface of the sealing body 18 contacting the mounting portion 104 is a second surface, and a junction of the first surface and the second surface is provided with a chamfer 182; the sealing body 18 is fitted over the circumferential outer portion of the mounting portion 104 from the end where the chamfer 182 is provided.

In this embodiment, a second mounting groove 110 is formed on the circumferential outer portion of the mounting portion 104, the second sealing element 14 is disposed in the second mounting groove 110, in order to enable the sealing body 18 and the mounting portion 104 to press the second sealing element 14, after the second sealing element 14 is mounted in the second mounting groove 110, a portion of the second sealing element 14 needs to protrude out of a notch of the second mounting groove 110, so that the sealing body 18 (the sealing body 18 is provided with a through hole) interferes with the second sealing element 14 in the process of being sleeved on the mounting portion 104, in order to facilitate the mounting of the sealing body 18, a chamfer 182 is disposed at a connection position between the first surface and the second surface (a surface of the sealing body 18 contacting with the pressing portion 102 is a first surface, a surface of the sealing body 18 contacting with the mounting portion 104 is a second surface), the sealing body 18 is sleeved on the mounting portion 104 from an end provided with the chamfer 182, a, the transition surface can be an inclined surface, an arc surface, a wedge surface and the like. When the seal body 18 is fitted into the fitting portion through the side provided with the chamfer 182 (transition surface), the front portion (one end fitted first) of the seal body 18 does not interfere with the second seal member 14, facilitating the fitting of the seal body 18. In the above-described mounting process, the sealing body 18 can be mounted without requiring a large mounting force, and therefore the mounting process is simple.

In an embodiment of the present invention, preferably, as shown in fig. 5, 6, 7, 8 and 9, the piston structure 1 further includes: a flange 20; the other end of the mounting portion 104 is connected to the flange 20 through the piston body 16, and the flange 20 presses one side of the piston body 16; the connecting rod is connected to the mounting portion 104 by fasteners 22.

In this embodiment, the piston structure 1 further includes a flange 20, the other end of the mounting portion 104 is connected to the flange 20 through the piston, the flange 20 presses one side of the piston body 16, the flange 20 is connected to the mounting portion 104 by a fastening member 22, the piston body 16 and the sealing body 18 are axially mounted and pressed by the flange 20, and the flange 20 is connected to the mounting portion 104 by the fastening member 22.

Preferably, the fastening member 22 is a screw, and a threaded hole is formed on an end surface of the mounting portion 104, and the screw is matched with the threaded hole to fixedly connect the flange 20 and the mounting portion 104.

In an embodiment of the present invention, preferably, as shown in fig. 5, 6, 7 and 8, the piston structure 1 further includes: a guide ring 24; the guide ring 24 is disposed around the piston body 16, and the guide ring 24 is interposed between the sealing body 18 and the flange 20.

In this embodiment, the outer side of the piston body 16 is sleeved with the guide ring 24, and the guide ring 24 supports the outer side of the piston body 16, so that the stability of the axial movement of the piston structure 1 can be facilitated, the piston structure 1 is not greatly deviated, and eccentric wear caused by eccentricity of the piston structure 1 can be avoided.

In an embodiment of the present invention, preferably, as shown in fig. 5, 6, 7 and 8, the piston structure 1 further includes: dust ring 26 and positioning part 202; the dust ring 26 includes a fixing portion and a dust-proof portion; the positioning part 202 is arranged at the circumferential outer part of the flange plate 20, and the positioning part 202 is provided with a fixing groove with an opening facing the guide ring 24; one end of the fixing part is clamped in the fixing groove, the other end of the fixing part is connected with one end of the dustproof part, and the other end of the dustproof part protrudes towards the direction far away from the axis of the flange plate 20.

In this embodiment, the piston structure 1 further includes: dust ring 26 and positioning part 202; the dust ring 26 includes a fixing portion and a dust-proof portion; the positioning part 202 is arranged at the circumferential outer part of the flange plate 20, and the positioning part 202 is provided with a fixing groove with an opening facing the guide ring 24; the one end card of fixed part is located in the fixed slot, and the other end of fixed part is connected with the one end of dustproof part, and the other end orientation of dustproof part is kept away from the direction arch of ring flange 20 axis, and when piston structure 1 carried out axial motion, the bulge of dust ring 26 can play the effect of blockking to debris such as silt particle, and then can avoid hou mian seal 18 and sealing member to receive the wearing and tearing of debris such as silt particle to the life of part has been improved.

In an embodiment of the present invention, preferably, as shown in fig. 11, a pumping system is proposed, comprising a piston structure 1 according to any of the above-mentioned technical solutions.

The utility model provides a pumping system, including any one of the above-mentioned technical scheme piston structure 1, consequently have this piston structure 1's whole beneficial effect, no longer describe herein. The pumping system further comprises a main oil cylinder 4, a conveying cylinder 6 and a water tank 8.

In an embodiment of the present invention, preferably, a construction machine is provided, including the pumping system according to any one of the above technical solutions.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in an embodiment or example of the invention. In the present disclosure, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Piston structure (1), characterized in that it comprises:

the pressing plate (10), the pressing plate (10) includes a pressing part (102) and a mounting part (104), the pressing part (102) is connected with one end of the mounting part (104);

a piston body (16), wherein the piston body (16) is sleeved on the mounting part (104);

a sealing body (18), wherein the sealing body (18) is sleeved on the mounting part (104), and the sealing body (18) is arranged between the compression part (102) and the piston body (16);

a first mounting groove (108) is formed in the circumferential outer portion of the mounting portion (104);

a first seal (12), wherein the first seal (12) is disposed in the first mounting groove (108), and the first seal (12) is interposed between the sealing body (18) and the mounting portion (104).

2. A piston structure (1) according to claim 1, further comprising:

the protruding portion (106) is arranged on the first end face of the pressing portion (102) in a protruding mode, the protruding portion (106) is of a tooth-shaped structure, and the first end face of the pressing portion (102) is abutted to the sealing body (18).

3. Piston structure (1) according to claim 1,

a second mounting groove (110) is formed in the first end face of the pressing part (102);

the piston structure (1) further comprises: and a second seal (14), wherein the second seal (14) is arranged in the second mounting groove (110), and the second seal (14) is arranged between the sealing body (18) and the pressing part (102).

4. A piston structure (1) according to claim 3,

the first mounting groove (108) is arranged around the circumference of the mounting part (104);

the second mounting groove (110) is disposed on the first end surface around the mounting portion (104).

5. Piston structure (1) according to claim 1,

the surface of the sealing body (18) contacting with the pressing part (102) is a first surface, the surface of the sealing body (18) contacting with the mounting part (104) is a second surface, and a chamfer (182) is arranged at the joint of the first surface and the second surface;

the sealing body (18) is sleeved on the circumferential outer part of the mounting part (104) from one end provided with the chamfer (182).

6. A piston arrangement (1) according to any of claims 1-5, further comprising:

the other end of the mounting part (104) penetrates through the piston body (16) to be connected with the flange plate (20), and the flange plate (20) presses one side of the piston body (16);

the flange (20) is connected to the mounting portion (104) by fasteners (22).

7. A piston arrangement (1) according to claim 6, further comprising:

the piston body (16) is sleeved with the guide ring (24), the guide ring (24) is sleeved on the circumferential outer portion of the piston body (16), and the guide ring (24) is clamped between the sealing body (18) and the flange plate (20).

8. Piston structure (1) according to claim 7, characterized in that it further comprises:

a dust ring (26), the dust ring (26) comprising a fixed portion and a dust portion;

the positioning part (202), the positioning part (202) is arranged at the circumferential outer part of the flange plate (20), and the positioning part (202) is provided with a fixing groove with an opening facing the guide ring (24);

one end of the fixing portion is clamped in the fixing groove, the other end of the fixing portion is connected with one end of the dustproof portion, and the other end of the dustproof portion protrudes towards the direction far away from the axis of the flange plate (20).

9. A pumping system, characterized by comprising a piston structure (1) according to any one of claims 1 to 8.

10. A working machine, characterized by comprising a pumping system according to claim 9.