CN211009377U - Piston seat - Google Patents

Abstract

The utility model discloses a piston seat, which comprises a piston, a piston rod and a guide rod, wherein the central position of the upper end surface of the piston is fixedly connected with the piston rod, the lower side of the outer wall of the guide rod is connected with a piston in a penetrating way, the upper side of the outer wall is sleeved with a piston rod, the axial centers of the piston, the piston rod and the guide rod are collinear, the piston body is arranged inside the piston, a cooling cavity is arranged inside the piston body, a first rod block and a second rod block are arranged inside the piston rod, a water outlet cavity is arranged inside the first rod block, a water inlet cavity is arranged inside the second rod block, water is fed into the water inlet cavity, the cooling cavity is cooled, and water is drained from the water drainage cavity, under the cooperation jointly of three cavities through intake antrum, cooling chamber and drainage chamber, effectively reduce the operating temperature of piston seat, prevent that the piston seat from being heated the deformation, be provided with the guide bar, can effectively prevent that the piston seat axle center is skew, improve the stability of piston seat operation.

Description

Piston seat

Technical Field

The utility model relates to a pneumatic cylinder field specifically is a piston seat.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion (or swinging motion), and has simple structure and reliable operation. When it is used to implement reciprocating movement, it can remove speed-reducing device, and has no transmission gap, and its movement is stable, so that it can be extensively used in hydraulic systems of various machines.

Chinese patent with publication number CN201120488735.5 discloses a reciprocating pump piston seat, which adopts a connecting rod and a piston body integrated into one piece, reduces the number of parts in the piston seat, reduces the production cost, and can ensure good sealing effect and connection between the connecting rod and the piston body without looseness during the reciprocating motion process of the connecting rod driving the piston body, but in practical application, the clearance is reduced due to overheating of a hydraulic system due to the piston seat, and the action is inflexible and clamping stagnation can be generated, and the overheating of the hydraulic system can also lead to deformation of a sealing ring, so that the sealing performance is reduced, and the failure of the piston seat is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a piston seat, adopted the intake antrum to intake, cooling chamber cooling and arrange water chamber drainage, through intake antrum, cooling chamber and arrange under the three chamber common cooperations in water chamber, effectively reduce the operating temperature of piston seat, prevent piston seat thermal deformation, be provided with the guide bar, can prevent effectively that the piston seat axle center is skew, improve the stability of piston seat operation.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a piston seat, includes piston, piston rod and guide bar, the outer wall downside through connection of guide bar has the piston, and the piston rod has been cup jointed to the outer wall upside, the up end central point of piston puts the fixedly connected with piston rod, the axial direction collineation of piston, piston rod and guide bar, the inside of piston is including the piston body, the inside of piston body is provided with the cooling chamber, the inside of piston rod is including first pole piece and second pole piece, the right flank of first pole piece and the left surface fixed connection of second pole piece, the inside of first pole piece is provided with out the water cavity, the inside of second pole piece is provided with the intake antrum, the left downside of intake antrum communicates with each other through the right downside of cooling chamber and intake antrum and is connected.

Furthermore, the left side and the right side of the piston body are respectively connected with a first valve and a second valve in a penetrating mode, the centers of the first valve and the second valve are connected with the center of the piston body in a straight line, and the size of the first valve is consistent with that of the second valve.

Furthermore, two first grooves are axially and fixedly connected to the lower side of the outer wall of the piston body in parallel, the cross sections of the two first grooves are of inverted trapezoid-shaped structures, piston outer rings are tightly attached to the bottoms of the first grooves, the two piston outer rings are matched with the first grooves, and the two piston outer rings are of circular ring-shaped structures.

Furthermore, the upper end face of the piston body is fixedly connected with a first positioning block, the inner wall of the first positioning block is movably connected with a piston rod, and the first positioning block is of an annular structure.

Furthermore, a second positioning block is fixedly connected to the lower end face of the piston body, and the second positioning block is of an annular structure.

Furthermore, the inner wall of the piston body is fixedly connected with two second grooves which are parallel and level to the first grooves, the cross sections of the two second grooves are of inverted trapezoid-shaped structures, piston inner rings are tightly attached to the bottoms of the second grooves, the two piston inner rings are matched with the second grooves, and the two piston inner rings are of circular ring-shaped structures.

Furthermore, the top of the outer wall of the first rod block is fixedly connected with a water outlet hole, one side of the water outlet hole opening is communicated with a water outlet cavity, the other side of the water outlet hole opening is communicated with outside air, and the water outlet cavity is of a cylindrical structure.

Furthermore, the top of the outer wall of the second rod block is fixedly connected with a water inlet, one side of the water inlet opening is communicated with a water inlet cavity, the other side of the water inlet opening is communicated with external air, and the water inlet is of a cylindrical structure.

To sum up, the utility model discloses following beneficial effect has:

1. this piston seat, there is the intake antrum respectively through the inside at first pole piece, second pole piece and piston body, go out water chamber and cooling chamber, the intake antrum, it communicates with each other with the cooling chamber to go out the water chamber and is connected, can make the intake antrum, the heat interchange in play water chamber and cooling chamber, the heat that makes the piston body in the gliding in-process that makes a round trip passes through the cooling chamber and delivers the intake antrum and the inner chamber that goes out the water chamber separately, the inner chamber heat that comes from the cooling chamber is all absorbed to the refrigerated things through the intake antrum and play water chamber inner chamber, reduce the temperature in the cooling chamber, the outer wall of piston body is heated the temperature, slow down the speed that piston inner ring and piston outer loop warp because of high temperature work, avoid the piston body to lead to liquid leakage because of sealed untight.

2. This piston seat has the piston rod through the outer wall at the guide bar cup jointed, and the through connection has the piston body, and the area of contact of increase piston body and piston rod and guide bar has avoided the outer wall of piston body to contact the interior cylinder face alone, and the outer wall atress that easily leads to the piston body is concentrated, causes the piston body to warp, causes the skew in piston body axle center, and frictional force increase causes the piston seat production jamming phenomenon of moving.

3. This piston seat, outer wall through at first pole piece and second pole piece is provided with apopore and inlet opening, be convenient for pour into and emit into the cooling material to the intake antrum, make the cooling material constantly pour into from the inlet opening into at source, through heat exchange, with the intake antrum, the heat in cooling chamber and play water pocket is discharged from the apopore, the inside temperature in cooling chamber has effectively been reduced, thereby the temperature of being heated of piston seat has been reduced, reduce the piston outer loop, the temperature of the outer wall of piston inner ring and piston body, can effectively prevent the piston inner ring, piston outer loop and outer wall are because of high temperature deformation, lead to the cooperation sealed untight, cause pressure leakage, arouse the piston seat jamming.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a cross-sectional view of the piston rod of the present invention;

fig. 3 is a cross-sectional view of a piston body of the present invention;

fig. 4 is an overall sectional view of the present invention.

In the figure: 1. a piston; 101. a piston body; 1011. a first groove; 1012. a piston outer ring; 102. a first positioning block; 103. a first valve; 104. a second valve; 105. a second positioning block; 1013. a second groove; 1014. a piston inner ring; 106. a cooling chamber; 2. a piston rod; 201. a first pole block; 2011. a water outlet cavity; 2012. a water outlet hole; 202. a second pole block; 2021. a water inlet cavity; 2022. a water inlet hole; 3. a guide rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-4, the present invention provides a technical solution: a piston seat comprises a piston 1, a piston rod 2 and a guide rod 3, wherein the piston 1, the piston rod 2 and the guide rod 3 are all arranged to be of a cylindrical structure, the piston rod 2 is fixedly connected to the central position of the upper end face of the piston 1, the piston 1 and the piston rod 2 are connected into a whole, the piston 1 is prevented from being connected with the piston rod 2 to generate looseness, the piston 1 is connected to the lower side of the outer wall of the guide rod 3 in a penetrating manner, the piston rod 2 is sleeved on the upper side of the outer wall, the piston 1 is connected to the outer wall of the guide rod 3 in a penetrating manner, the piston 1 is convenient to guide, the piston rod 2 is sleeved on the outer wall of the guide rod 3, the inner wall of the piston rod 2 can slide on the guide rod conveniently, the length of the piston rod 2, the axial centers of the piston 1, the piston rod 2 and the guide rod 3 are collinear, the axes among the piston 1, the piston rod 2 and the guide rod 3 are kept consistent, the guide rod 3 can be connected with a cylinder sleeve through threads, the piston 1 is arranged to include a piston body 101, a cooling cavity 106 is arranged in the piston body 101, the cooling cavity 106 is arranged to cool the interior of the piston body 101, the piston rod 2 includes a first rod block 201 and a second rod block 202, the first rod block 201 and the second rod block 202 are arranged to be in a semi-cylindrical structure, the right side surface of the first rod block 201 is fixedly connected with the left side surface of the second rod block 202, the first rod block 201 and the second rod block 202 are combined to be in a cylindrical structure, a water outlet cavity 2011 is arranged in the first rod block 201, and a cooling object in the inner cavity of the water outlet cavity 2011 absorbs inner cavity heat from the cooling cavity 106 through the water outlet cavity 2011 to reduce the temperature in the cooling cavity 106, the inside of second pole piece 202 is provided with intake chamber 2021, absorbs the inner chamber heat that comes from cooling chamber 106 through the cooling thing of intake chamber 2021 inner chamber, reduces the temperature in cooling chamber 106 intracavity, and the left downside that goes out water chamber 2011 communicates with each other through cooling chamber 106 and intake chamber 2021's right downside and is connected, communicates with each other with intake chamber 2021 and drainage chamber 2011 through cooling chamber 106 respectively and is connected, makes the intake chamber 2021, cooling chamber 106 and drainage chamber 201 between be heated evenly.

Furthermore, the left side and the right side of the piston body 101 are respectively connected with a first valve 103 and a second valve 104 in a penetrating manner, the centers of the first valve 103 and the second valve 104 are connected with the center of the piston body 101 in a straight line, the size of the first valve 103 is consistent with that of the second valve 104, the first valve 103 and the second valve 104 are arranged on the left side and the right side of the piston body 101, the first valve 103 plays a pressure limiting role in the rightward movement of the piston body 101, the second valve 104 plays a pressure limiting role in the leftward movement of the piston body 101, and the first valve 103 and the second valve 104 are consistent in size and convenient to install.

Furthermore, the lower side of the outer wall of the piston body 101 is axially and fixedly connected with two first grooves 1011 in parallel, sealing rings are installed through the two first grooves 1011 on the lower side of the outer wall of the piston body 101, the cross sections of the two first grooves 1011 are in an inverted trapezoid-shaped structure, the sealing rings are convenient to install, the bottom of the first groove 1011 is tightly attached with a piston outer ring 1012, the two piston outer rings 1012 are both matched with the first grooves (1011), the outer walls of the two piston outer rings 1012 are flush with the outer wall of the piston body 101 through the two first grooves 1011 and the piston outer ring 1012 which are matched, the two piston outer rings 1012 are both in an 'annular' shaped structure, the contact area between the piston outer ring and the piston body 101 is increased, and the sealing performance of the piston outer ring 1012 is improved.

Furthermore, the upper end face of the piston body 101 is fixedly connected with a first positioning block 102, the inner wall of the first positioning block 102 is movably connected with the piston rod 2, the first positioning block 102 is in an annular structure, the upper end face of the piston body 101 is provided with the first positioning block 102, the length of the first positioning block 102 is greater than that of the piston body 101, the diameter of the first positioning block 102 is smaller than that of the piston body 101, the positioning function is realized when the piston body 101 moves to the right, the contact area of the first positioning block 102 is increased through the annular structure of the first positioning block 102, and the impact force is reduced.

Furthermore, the lower end surface of the piston body 101 is fixedly connected with a second positioning block 105, the second positioning block 105 is of an annular structure, the second positioning block 105 is arranged on the lower end surface of the piston body 101, the length of the second positioning block 105 is greater than that of the piston body 101, the diameter of the second positioning block 105 is smaller than that of the piston body 101, the piston body 101 is positioned in the leftward movement process, the contact area of the second positioning block 105 is increased through the annular structure of the second positioning block 105, and the impact force is reduced.

Further, the inner wall of the piston body 101 is fixedly connected with two second grooves 1013 which are flush with the first grooves 1011, the cross sections of the two second grooves 1013 are in a reversed trapezoid-shaped structure, the bottoms of the second grooves 1013 are tightly attached with piston inner rings 1014, the two piston inner rings 1014 are both adapted to the second grooves 1013, the two piston inner rings 1014 are both in a ring-shaped structure, the sealing ring is installed by two second grooves 1013 on the lower side of the inner wall of the piston body 101, the two second grooves 1013 are in an inverted trapezoid-shaped structure, so that the sealing ring can be conveniently installed, the two second grooves 1013 and the inner piston ring 1014 are matched, so that the outer walls of the two inner piston rings 1014 are flush with the inner wall of the piston body 101, the two piston inner rings 1014 are both in a circular ring-shaped structure, so that the contact area between the piston inner rings 1014 and the piston body 101 is increased, and the sealing performance of the piston inner rings 1014 is improved.

Further, the top of the outer wall of the first rod block 201 is fixedly connected with a water outlet 2012, one side of the opening of the water outlet 2012 is communicated with a water outlet cavity 2011, the other side of the opening of the water outlet 2012 is communicated with the outside air, the water outlet cavity 2011 is in a cylindrical structure, the outer wall of the first rod block 201 is provided with the water outlet 2012 communicated with the water outlet cavity 2011, so that the cooling material is discharged from the water inlet cavity 2021 through the water outlet 2012, and the water outlet 2012 is in a cylindrical structure to facilitate pipeline installation.

Further, the top of the outer wall of the second rod block 202 is fixedly connected with a water inlet 2022, one open side of the water inlet 2022 is connected with a water inlet chamber 2021 in a communicating manner, the other open side of the water inlet 2022 is connected with external air in a communicating manner, the water inlet 2022 is in a "cylindrical" structure, the outer wall of the second rod block 202 is provided with the water inlet 2022 in a communicating manner with the water inlet chamber 2021, so that a cooling substance is injected into the inside of the water inlet chamber 2021 through the water inlet 2022, and the water inlet 2022 is in a "cylindrical" structure to facilitate pipeline installation.

The working principle is as follows: firstly, a guide rod 3, a piston rod 2 and a piston 1 are placed in a cylinder sleeve, the guide rod 3 is fixed at the center of the inner wall of the cylinder sleeve, the cylinder cover seals the cylinder sleeve, when the hydraulic cylinder works, oil pushes the piston 1 to move right along the guide rod 3, the outer wall of a piston body 101 and the outer wall of two piston outer rings 1012 rub against the cylinder sleeve, the outer wall of two piston inner rings 1014 and the inner wall of the piston body rub against the guide rod to generate heat, the inside and the outer wall of the piston body 101 transfer the heat to a cooling cavity 106 to raise the internal temperature of the cooling cavity 106, cooling substances continuously flow into a water inlet cavity 2021 through a water inlet 2022, the cooling substances cool the internal temperature of the water inlet cavity 2021 and simultaneously flow into the cooling cavity 106 to reduce the temperature of the cooling cavity 106, the heated cooling substances flow into a water outlet cavity 2011, are discharged outside through a water outlet 2012, and slide right on the piston, when the pressure in the cylinder liner is suddenly increased, the first valve 103 works, oil on the left side in the cylinder liner enters the right side of the cylinder liner through the first valve 103, when the first positioning block 102 contacts the cylinder cover, the piston 1 moves forward and finishes, when the piston body 101 slides to the left, and when the pressure in the cylinder liner is suddenly increased, the second valve 104 works, the oil on the right side in the cylinder liner enters the left side of the cylinder liner through the second valve 104, and when the second positioning block 105 contacts the inner wall of the cylinder liner, the piston 1 moves backward and finishes.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a piston seat, includes piston (1), piston rod (2) and guide bar (3), its characterized in that: the lower side of the outer wall of the guide rod (3) is connected with a piston (1) in a penetrating way, the upper side of the outer wall is sleeved with a piston rod (2), the center of the upper end surface of the piston (1) is fixedly connected with a piston rod (2), the axial centers of the piston (1), the piston rod (2) and the guide rod (3) are collinear, the piston (1) comprises a piston body (101) inside, a cooling cavity (106) is arranged inside the piston body (101), the interior of the piston rod (2) comprises a first rod block (201) and a second rod block (202), the right side surface of the first rod block (201) is fixedly connected with the left side surface of the second rod block (202), a water outlet cavity (2011) is arranged inside the first rod block (201), a water inlet cavity (2021) is arranged inside the second rod block (202), the left lower side of the water inlet cavity (2021) is communicated and connected with the right lower side of the water inlet cavity (2021) through a cooling cavity (106).

2. The piston seat of claim 1, wherein: the left side and the right side of the piston body (101) are respectively connected with a first valve (103) and a second valve (104) in a penetrating mode, the centers of the first valve (103) and the second valve (104) are connected with the center of the piston body (101) in a straight line, and the size of the first valve (103) is consistent with that of the second valve (104).

3. The piston seat of claim 1, wherein: the piston is characterized in that two first grooves (1011) are axially and fixedly connected to the lower side of the outer wall of the piston body (101) in parallel, the cross sections of the two first grooves (1011) are of an inverted trapezoid-shaped structure, piston outer rings (1012) are tightly attached to the bottoms of the first grooves (1011), the two piston outer rings (1012) are matched with the first grooves (1011), and the two piston outer rings (1012) are of a circular ring-shaped structure.

4. The piston seat of claim 1, wherein: the upper end face of the piston body (101) is fixedly connected with a first positioning block (102), the inner wall of the first positioning block (102) is movably connected with a piston rod (2), and the first positioning block (102) is of an annular structure.

5. The piston seat of claim 1, wherein: the lower end face of the piston body (101) is fixedly connected with a second positioning block (105), and the second positioning block (105) is of an annular structure.

6. The piston seat of claim 1, wherein: the inner wall of the piston body (101) is fixedly connected with two second grooves (1013) which are parallel and level to the first grooves (1011), the cross sections of the two second grooves (1013) are of an inverted trapezoid-shaped structure, the bottoms of the second grooves (1013) are tightly attached with piston inner rings (1014), the two piston inner rings (1014) are matched with the second grooves (1013), and the two piston inner rings (1014) are of a circular ring-shaped structure.

7. The piston seat of claim 1, wherein: the top fixedly connected with apopore (2012) of first pole piece (201) outer wall, apopore (2012) open-ended one side communicates with each other and is connected with out water cavity (2011), apopore (2012) open-ended opposite side communicates with each other and connects the outside air, it is "cylinder" column structure to go out water cavity (2011).

8. The piston seat of claim 1, wherein: the top of the outer wall of the second rod block (202) is fixedly connected with a water inlet hole (2022), one open side of the water inlet hole (2022) is communicated with a water inlet cavity (2021), the other open side of the water inlet hole (2022) is communicated with external air, and the water inlet hole (2022) is of a cylindrical structure.

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