Composite piston and hydraulic cylinder

Abstract

The utility model discloses a composite piston and a hydraulic cylinder, and relates to the technical field of hydraulic cylinders. The through holes are formed in the supporting framework; the rubber wrapping body wraps the inner part and the outer part of the supporting framework; the plurality of rubber columns are correspondingly positioned in the plurality of through holes; wherein the plurality of rubber columns are connected with the rubber bag body; the rubber bag body comprises a first bag body and a second bag body, the second bag body is sleeved outside the supporting framework; wherein the first bag body is connected with the second bag body, and the plurality of rubber columns are connected with the first bag body and the second bag body. The utility model has the technical effects of light weight and high strength.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a composite piston and a hydraulic cylinder. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator used to convert hydraulic energy into mechanical energy. It has the advantages of large bearing capacity and reliable operation, and is widely used in photovoltaic tracking bracket systems.

[0003] The piston is a key component of a hydraulic cylinder. This Chinese utility model patent, published with publication number CN207093503U and published on March 13, 2018, discloses a piston seal structure for a hydraulic cylinder. The structure comprises a cylinder body, a piston rod, and a piston. The piston rod is movably disposed within the cylinder body, and the piston is fixed to the piston rod and positioned within the cylinder body. A sealing assembly is disposed between the piston and the inner wall of the cylinder body. The sealing assembly comprises a double-acting seal disposed in the center of the piston. Guide sleeves are disposed on either side of the piston, each communicating with oil chambers on either side of the piston. This piston seal structure for a hydraulic cylinder is not only simple in structure and low in cost, but also offers low starting pressure, low energy consumption, and a low coefficient of friction, extending the service life of the seal. However, its disadvantage is that the piston is an integrally molded structure. This can be heavy when made of metal or other materials, and weak when made of rubber or other materials. Utility Model Content

[0004] In view of the above technical problems, the utility model provides a composite piston and hydraulic cylinder, which has light weight and high strength.

[0005] In order to solve the above problems, the technical solution provided by the present invention is as follows:

[0006] A composite piston comprising:

[0007] Support frame;

[0008] a plurality of through holes provided in the support frame;

[0009] A rubber package wrapped inside and outside the support frame;

[0010] a plurality of rubber columns correspondingly located in the plurality of through holes;

[0011] Wherein, the plurality of rubber columns are all connected to the rubber package.

[0012] Optionally, the rubber package includes:

[0013] A first package body sleeved inside the support frame;

[0014] A second enclosure sleeved on the outside of the support frame;

[0015] The first package body and the second package body are connected, and the plurality of rubber columns are connected to both the first package body and the second package body.

[0016] Optionally, the rubber package further includes:

[0017] a third enclosure connected to one end of the support frame;

[0018] a fourth enclosure connected to the other end of the support frame;

[0019] The third package is connected to one end of the first package and one end of the second package, the fourth package is connected to the other end of the first package and the other end of the second package, one end of the plurality of rubber columns is connected to the third package, and the other end of the plurality of rubber columns is connected to the fourth package.

[0020] Optionally, the first package, the second package, the third package, the fourth package and the plurality of rubber columns are connected by injection molding.

[0021] Optionally, also include:

[0022] a first end cap connected to one end of the rubber package;

[0023] A second end cap is connected to the other end of the rubber package.

[0024] Optionally, also include:

[0025] a first step portion provided at one end of the rubber package;

[0026] a second step portion provided at the other end of the rubber package;

[0027] Wherein, the first end cover is connected to the first step portion, and the second end cover is connected to the second step portion.

[0028] Optionally, it further includes a plurality of sealing rings that are injection molded and connected to the outside of the rubber package.

[0029] Optionally, also include:

[0030] A mounting groove provided outside the rubber package;

[0031] An anti-wear ring is at least partially located within the mounting groove.

[0032] Optionally, the plurality of through holes and the plurality of rubber columns are evenly distributed along the circumference of the support frame.

[0033] A hydraulic cylinder comprising a composite piston and further comprising:

[0034] A piston rod threadedly sleeved in the rubber body;

[0035] A first nut and a second nut are both threadedly connected to the piston rod, the first nut contacts one end of the rubber package, and the second nut contacts the other end of the rubber package.

[0036] The technical solution provided by the present invention has the following beneficial effects compared with the prior art: the rubber package is used to form the composite piston of the present application together with the supporting frame, etc., and has a smaller weight while ensuring that the volume of the composite piston of the present application remains unchanged, thereby making the weight of the related hydraulic cylinder smaller, and thus making the installation of the related hydraulic cylinder more convenient. At the same time, the supporting frame facilitates ensuring higher strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A cross-sectional view of a composite piston proposed in an embodiment of the present utility model;

[0038] Figure 2 This is one of the structural diagrams of the rubber package proposed in the embodiment of the present utility model;

[0039] Figure 3 This is the second structural diagram of the rubber package proposed in the embodiment of the present utility model;

[0040] Figure 4 A schematic structural diagram of the first end cover proposed in an embodiment of the present utility model;

[0041] Figure 5 A schematic structural diagram of the second end cover proposed in an embodiment of the present utility model;

[0042] Figure 6 A schematic structural diagram of the anti-wear ring proposed in an embodiment of the present utility model;

[0043] Figure 7 A partial diagram of a hydraulic cylinder proposed in an embodiment of the present utility model;

[0044] In the figure: 1. Support frame; 11. Through hole; 2. Rubber package; 21. First package; 22. Second package; 23. Third package; 231. First step; 24. Fourth package; 241. Second step; 25. Mounting groove; 3. Rubber column; 41. First end cover; 42. Second end cover; 5. Sealing ring; 6. Piston rod; 71. First nut; 72. Second nut; 8. Anti-wear ring. DETAILED DESCRIPTION

[0045] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0046] Example 1

[0047] Combined with attachment Figure 1-7 This embodiment provides a composite piston, comprising: a support frame 1; a plurality of through holes 11 provided in the support frame 1; a rubber package 2 wrapped inside and outside the support frame 1; a plurality of rubber columns 3 correspondingly located in the plurality of through holes 11; wherein the plurality of rubber columns 3 are all connected to the rubber package 2.

[0048] Specifically, the support skeleton 1 is used to carry the rubber package 2 to increase the overall strength of the composite piston of the present application. The material of the support skeleton 1 can be aluminum alloy, stainless steel or other metals; the rubber package 2 is used to form the composite piston of the present application together with the support skeleton 1, etc., while ensuring that the volume of the composite piston of the present application remains unchanged, it has a smaller weight, thereby making the weight of the related hydraulic cylinder smaller, and thus making the installation of the related hydraulic cylinder convenient. At the same time, the support skeleton 1 is convenient to ensure high strength; a number of through holes 11 are used to carry a number of rubber columns 3. Since the several rubber columns 3 are all connected to the rubber package 2, it is convenient to increase the contact area between the rubber package 2 and the support skeleton 1, thereby facilitating the increase of the connection firmness between the two; wherein, the specific materials of the rubber columns 3 and the rubber package 2 can be silicone rubber, fluororubber, etc.

[0049] Further, such as Figure 2 The rubber package 2 includes a first package 21 that is sleeved inside the support frame 1 and a second package 22 that is sleeved outside the support frame 1. The first package 21 and the second package 22 are connected, and the rubber columns 3 are connected to both the first package 21 and the second package 22. Specifically, the first package 21 serves as the inner layer of the composite piston of the present application, while the second package 22 serves as the outer layer of the composite piston of the present application.

[0050] Further, such as Figure 2 The rubber package 2 also includes: a third package 23 connected to one end of the support frame 1; a fourth package 24 connected to the other end of the support frame 1; wherein the third package 23 is connected to one end of the first package 21 and one end of the second package 22, the fourth package 24 is connected to the other end of the first package 21 and the other end of the second package 22, one end of several rubber columns 3 is connected to the third package 23, and the other end of several rubber columns 3 is connected to the fourth package 24.

[0051] Specifically, the third enclosure 23 is used to wrap one end of the support frame 1 ; the fourth enclosure 24 is used to wrap the other end of the support frame 1 .

[0052] Further, such as Figure 2The connection between the first package 21, the second package 22, the third package 23, the fourth package 24 and the plurality of rubber columns 3 is an injection molding connection. Specifically, the injection molding connection facilitates the connection of the first package 21, the second package 22, the third package 23, the fourth package 24 and the plurality of rubber columns 3 to have good integrity; during injection molding, the support frame 1 is first placed in the injection mold and supported by the plurality of solid rubber columns so that there is a gap between the support frame 1 and the bottom of the injection mold, and then the fluid rubber is poured into the injection mold so that the fluid rubber completely wraps the support frame 1 and the fluid rubber and the plurality of solid rubber columns are fully combined into one. After a preset time, the mold is demolded to obtain the composite piston of the present application, wherein the number of the plurality of solid rubber columns is not limited and can be eight, ten, etc., and the plurality of solid rubber columns are evenly distributed along the circumference of the support frame 1, so that the force on the bottom of the support frame 1 is uniform, preventing the support frame 1 from moving during injection molding, and ensuring a good injection molding effect.

[0053] Further, such as Figure 4-5 , further comprising: a first end cap 41 connected to one end of the rubber package 2; and a second end cap 42 connected to the other end of the rubber package 2. Specifically, the first end cap 41 and the second end cap 42 are both used to increase the structural strength of the composite piston of the present application, and the material of the first end cap 41 and the second end cap 42 are preferably metal.

[0054] Further, such as Figure 2 , further comprising: a first step portion 231 provided at one end of the rubber package 2; and a second step portion 241 provided at the other end of the rubber package 2; wherein the first end cap 41 is connected to the first step portion 231, and the second end cap 42 is connected to the second step portion 241. Specifically, the first step portion 231 is provided on the third package 23, and the second step portion 241 is provided on the fourth package 24.

[0055] Further, such as Figure 2 , further comprising a plurality of sealing rings 5 ​​connected to the outside of the rubber package 2 by injection molding. Specifically, the plurality of sealing rings 5 ​​are specifically arranged outside the second package 22. The plurality of sealing rings 5 ​​are used to improve the sealing performance. Due to the injection molding connection, the sealing rings 5 ​​do not need to be installed during use and can prevent the sealing rings 5 ​​from being damaged during installation. The specific number of the plurality of sealing rings 5 ​​is not limited, and preferably four.

[0056] Further, such as Figure 2 and 6 , further comprising: a mounting groove 25 provided outside the rubber package 2; an anti-wear ring 8 at least partially located in the mounting groove 25. Specifically, the mounting groove 25 is used to mount the anti-wear ring 8; the anti-wear ring 8 is used to increase the anti-wear performance.

[0057] Further, such as Figure 1 The plurality of through holes 11 and the plurality of rubber columns 3 are uniformly distributed along the circumference of the support frame 1. Specifically, the uniform distribution along the circumference facilitates increasing the force uniformity of the composite piston of the present application.

[0058] This embodiment further provides a hydraulic cylinder comprising a composite piston according to this embodiment, and further comprising: a piston rod 6 threadedly sleeved within a rubber housing 2; and a first nut 71 and a second nut 72, both threadedly connected to the piston rod 6, wherein the first nut 71 contacts one end of the rubber housing 2, and the second nut 72 contacts the other end of the rubber housing 2. Specifically, the first nut 71 and the second nut 72 are both used for axial position limiting, preventing the composite piston according to this application from moving axially along the piston rod 6.

[0059] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A composite piston, characterized in that: include: Support frame; a plurality of through holes provided in the support frame; A rubber package wrapped inside and outside the support frame; a plurality of rubber columns correspondingly located in the plurality of through holes; Wherein, the plurality of rubber columns are all connected to the rubber package.

2. A composite piston according to claim 1, characterized in that: The rubber package comprises: A first package body sleeved inside the support frame; A second enclosure sleeved on the outside of the support frame; The first package body and the second package body are connected, and the plurality of rubber columns are connected to both the first package body and the second package body.

3. A composite piston according to claim 2, characterized in that: The rubber package also includes: a third enclosure connected to one end of the support frame; a fourth enclosure connected to the other end of the support frame; The third package is connected to one end of the first package and one end of the second package, the fourth package is connected to the other end of the first package and the other end of the second package, one end of the plurality of rubber columns is connected to the third package, and the other end of the plurality of rubber columns is connected to the fourth package.

4. A composite piston according to claim 3, characterized in that: The first package, the second package, the third package, the fourth package and the plurality of rubber columns are connected by injection molding.

5. A composite piston according to any one of claims 1 to 4, characterized in that: Also includes: a first end cap connected to one end of the rubber package; A second end cap is connected to the other end of the rubber package.

6. A composite piston according to claim 5, characterized in that: Also includes: a first step portion provided at one end of the rubber package; a second step portion provided at the other end of the rubber package; Wherein, the first end cover is connected to the first step portion, and the second end cover is connected to the second step portion.

7. A composite piston according to any one of claims 1 to 4, characterized in that: It also includes a plurality of sealing rings which are injection-molded and connected to the outside of the rubber package.

8. A composite piston according to any one of claims 1 to 4, characterized in that: Also includes: A mounting groove provided outside the rubber package; An anti-wear ring is at least partially located within the mounting groove.

9. A composite piston according to any one of claims 1 to 4, characterized in that: The plurality of through holes and the plurality of rubber columns are evenly distributed along the circumference of the support frame.

10. A hydraulic cylinder, characterized in that: The composite piston according to any one of claims 1 to 9 further comprises: A piston rod threadedly sleeved in the rubber body; A first nut and a second nut are both threadedly connected to the piston rod, the first nut contacts one end of the rubber package, and the second nut contacts the other end of the rubber package.

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