Novel combined piston seal

Abstract

The utility model discloses a novel combined piston seal which comprises a cylinder body, a buffering groove is formed in the upper surface of the cylinder body, a second piston is connected into the cylinder body in a sliding mode, a piston rod is arranged in the second piston, and the novel combined piston seal further comprises a sealing mechanism. The sealing mechanism comprises a rubber elastic body and a sliding ring, the rubber elastic body is fixedly connected into a mounting groove formed in the outer surface of the second piston, a clamping groove is formed in the outer arc surface of the rubber elastic body, the sliding ring is fixedly connected into the clamping groove, and a groove is formed in the inner arc surface of the rubber elastic body; the novel combined piston seal comprises a cylinder body, a sliding ring and an elastic body, the interior of the cylinder body is slidably connected with a piston top, a first piston and a piston bottom, and threaded holes which are vertically communicated are formed in the piston top, the first piston, the second piston and the piston bottom respectively. The problem of insufficient sealing performance of the sliding ring is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of piston seals, in particular to a novel combined piston seal. Background Art

[0002] When lifting heavy objects in daily life, hydraulic systems are often used. The hydraulic system injects hydraulic oil into the hydraulic cylinder to push the piston to drive the telescopic rod to move. Therefore, the piston needs to have good sealing performance. For this purpose, a new type of combined piston is usually used for sealing.

[0003] The existing new combined piston seal combines PTFE piston sealing ring, O-ring, sliding ring and elastomer to seal;

[0004] The sliding ring and the elastomer inside the existing new combined piston seal are usually separate entities. Although the separately installed sliding ring has high structural strength and low friction coefficient, which is beneficial to the sliding of the piston in the hydraulic cylinder, the sealing performance is poor. For this reason, we propose a new combined piston seal. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a new type of combined piston seal. By cooperating and installing the sliding ring with the elastomer, it ensures that the sliding ring has a low friction coefficient that is conducive to sliding, while compensating for the problem of insufficient sealing of the sliding ring, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a novel combined piston seal, comprising a cylinder body, a buffer groove being provided on the upper surface of the cylinder body, a second piston being slidably connected to the interior of the cylinder body, a piston rod being provided inside the second piston, and a sealing mechanism;

[0007] Sealing mechanism: includes a rubber elastomer and a sliding ring. The rubber elastomer is fixedly connected to the installation groove provided on the outer surface of the second piston. The outer arc surface of the rubber elastomer is provided with a card slot, and the sliding ring is fixedly connected in the card slot. The inner arc surface of the rubber elastomer is provided with a groove. The sliding ring and the elastomer are installed in coordination to ensure that the sliding ring has a low friction coefficient, which is conducive to sliding, while compensating for the problem of insufficient sealing of the sliding ring.

[0008] Furthermore, the interior of the cylinder body is slidably connected with a piston top, piston 1 and piston bottom respectively, and the interiors of the piston top, piston 1, piston 2 and piston bottom are respectively provided with vertically connected threaded holes, and a bolt is threadedly connected in the vertically connected threaded holes to form a piston.

[0009] Furthermore, a rubber sealing ring is fixedly connected to the outer surface of the piston 1, and a rubber sealing ring is also fixedly connected to the outer surface of the piston bottom, thereby improving the sealing performance of the piston.

[0010] Furthermore, vertically connected sliding grooves are respectively opened inside the piston top, piston one, piston two and piston bottom, and the vertically connected sliding grooves are installed in conjunction with the piston rod to install the piston rod.

[0011] Furthermore, a positioning hole 1 is opened inside the piston 2, and a positioning hole 2 is opened inside the piston rod. The positioning hole 1 is horizontally connected to the positioning hole 2. Pins are inserted into the positioning holes 1 and 2 to fix the piston rod.

[0012] Furthermore, a buffer plunger is fixedly connected to the upper end of the piston rod to prevent the piston from colliding with the inner wall of the hydraulic cylinder.

[0013] Furthermore, the outer surface of the cylinder body is fixedly connected with a liquid inlet for the inflow and outflow of hydraulic oil.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the new combined piston seal has the following advantages:

[0015] By cooperating with the sliding ring and the elastomer for installation, the poor sealing between the sliding ring and the contact surface caused by the uneven contact surface is prevented, the sealing of the piston is improved, and the low friction coefficient of the sliding ring is ensured to facilitate sliding, while compensating for the problem of insufficient sealing of the sliding ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 This is an enlarged structural diagram of point A of the present invention.

[0019] In the figure: 1 cylinder body, 2 buffer plunger, 3 piston top, 4 piston 1, 5 piston 2, 6 piston bottom, 7 piston rod, 8 bolt, 9 sealing mechanism, 91 rubber elastomer, 92 sliding ring, 10 pin shaft, 11 rubber sealing ring, 12 liquid inlet. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-3, this embodiment provides a technical solution: a new type of combined piston seal, including a cylinder body 1, a buffer groove is provided on the upper surface of the cylinder body 1, a piston 2 5 is slidably connected to the inside of the cylinder body 1, a piston rod 7 is provided inside the piston 2 5, and a buffer plunger 2 is fixedly connected to the upper end of the piston rod 7. The piston top 3, the piston 1 4, the piston 2 5 and the piston bottom 6 are respectively provided with vertically connected sliding grooves, and the vertically connected sliding grooves are installed in conjunction with the piston rod 7. A positioning hole 1 is provided inside the piston 2 5, and a positioning hole 2 is provided inside the piston rod 7. The positioning hole 1 and the positioning hole 2 are connected. Hole 2 is horizontally connected, and a pin 10 is inserted into the internal part of positioning hole 1 and positioning hole 2. The interior of the cylinder body 1 is respectively slidably connected to the piston top 3, piston 1 4 and piston bottom 6. The interior of the piston top 3, piston 1 4, piston 2 5 and piston bottom 6 are respectively provided with vertically connected threaded holes, and a bolt 8 is threadedly connected in each vertically connected threaded hole. The outer surface of piston 1 4 is fixedly connected to a rubber sealing ring 11, and the outer surface of the piston bottom 6 is also fixedly connected to a rubber sealing ring 11. The outer surface of the cylinder body 1 is fixedly connected to a liquid inlet 12, and also includes a sealing mechanism 9;

[0022] Sealing mechanism 9: includes a rubber elastic body 91 and a sliding ring 92. The rubber elastic body 91 is fixedly connected to the mounting groove provided on the outer surface of the piston 2 5. A card slot is provided on the outer arc surface of the rubber elastic body 91, and the sliding ring 92 is fixedly connected in the card slot. A groove is provided on the inner arc surface of the rubber elastic body 91, which can provide a better buffer space when the equipment vibrates or the pressure changes.

[0023] The working principle of the new combined piston seal provided by the present invention is as follows: when the new combined piston seal is working, the sliding ring 92 contacts the inner wall of the hydraulic cylinder and slides, and the rubber elastic body 91 squeezes the sliding ring 92 outward and contacts the inner wall of the hydraulic cylinder at the same time, thereby increasing the sealing performance of the new combined piston seal. The inner arc surface of the rubber elastic body 91 is provided with a groove, which can provide a better buffer space when the equipment vibrates or the pressure changes.

[0024] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A novel combined piston seal, comprising a cylinder body (1), wherein a buffer groove is provided on the upper surface of the cylinder body (1), a second piston (5) is slidably connected to the interior of the cylinder body (1), and a piston rod (7) is provided inside the second piston (5), characterized in that: Also included is a sealing mechanism (9); The sealing mechanism (9) comprises a rubber elastic body (91) and a sliding ring (92), wherein the rubber elastic body (91) is fixedly connected to a mounting groove provided on the outer surface of the second piston (5), a slot is provided on the outer arc surface of the rubber elastic body (91), the sliding ring (92) is fixedly connected in the slot, and a groove is provided on the inner arc surface of the rubber elastic body (91).

2. The novel combined piston seal according to claim 1 is characterized in that: The interior of the cylinder body (1) is slidably connected to a piston top (3), a piston one (4) and a piston bottom (6), and the interiors of the piston top (3), the piston one (4), the piston two (5) and the piston bottom (6) are respectively provided with vertically connected threaded holes, and a bolt (8) is threadedly connected in each of the vertically connected threaded holes.

3. The novel combined piston seal according to claim 2 is characterized in that: The outer surface of the piston 1 (4) is fixedly connected to a rubber sealing ring (11), and the outer surface of the piston bottom (6) is also fixedly connected to a rubber sealing ring (11).

4. The novel combined piston seal according to claim 2 is characterized in that: The piston top (3), piston one (4), piston two (5) and piston bottom (6) are respectively provided with vertically connected sliding grooves, and the vertically connected sliding grooves are installed in conjunction with the piston rod (7).

5. The novel combined piston seal according to claim 1 is characterized in that: A first positioning hole is provided inside the second piston (5), and a second positioning hole is provided inside the piston rod (7). The first positioning hole is horizontally connected to the second positioning hole, and a pin shaft (10) is inserted into the first positioning hole and the second positioning hole.

6. The novel combined piston seal according to claim 1 is characterized in that: The upper end of the piston rod (7) is fixedly connected to a buffer plunger (2).

7. The novel combined piston seal according to claim 1 is characterized in that: A liquid inlet (12) is fixedly connected to the outer surface of the cylinder body (1).

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