Piston rod head sealing device

Abstract

The utility model discloses a piston rod head sealing device which comprises a piston rod body and a knuckle bearing, the outer end of the piston rod body is connected with a rod head body, the front end and the rear end of the rod head body are both fixedly provided with connecting pieces, sealing grooves are formed in the connecting pieces, a connecting hole is formed in the rod head body, and the knuckle bearing is connected with the piston rod body. The outer side face of the knuckle bearing is connected with a waterproof pad through waterproof glue in a pasted mode, a connecting ring is fixed to the outer end of the waterproof pad, screw holes are formed in a connecting piece at equal angles, the sealing rubber ring is located in a sealing groove, and the connecting ring is fixedly connected with the connecting piece through a screw. The middle of the knuckle bearing is located in a connecting hole formed in the rod head body, and the outer end of the knuckle bearing protrudes out of the waterproof pad. The piston rod head sealing device is convenient to disassemble, assemble and combine, water leakage is avoided, the waterproof pad is arranged to protect the joint, the piston rod head sealing device adapts to movement of a knuckle bearing, and the sealing effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of piston rod head sealing technology, specifically a piston rod head sealing device. Background Technology

[0002] The piston rod head of the hydraulic cylinder is connected to a spherical bearing. To prevent water from entering the connection between the rod head and the spherical bearing, a rod head sealing device needs to be installed at the connection to prevent water from entering and corroding the spherical bearing and the connection with the connecting rod, thus affecting the normal operation of the hydraulic cylinder.

[0003] Chinese utility model patent CN219655012U discloses a piston rod head sealing device for an underwater hydraulic cylinder. The device includes a connected piston rod and rod head. The rod head has a connecting hole, and a spherical bearing is installed within the connecting hole. A pressure cap is fixedly installed in the connecting holes on both sides of the spherical bearing. The key feature is that each pressure cap has a stepped hole, and a skeleton oil seal is installed in the large-diameter hole outside the stepped hole via an interference fit. The inner end face of the skeleton oil seal is tightly attached to the corresponding end face of the stepped hole. This utility model has the advantage of good sealing effect, preventing seawater from corroding the spherical bearing and the connection with the connecting rod, thus ensuring the normal operation of the hydraulic cylinder.

[0004] Based on existing solutions and actual production and processing, the current piston rod head sealing device still has some problems. It is inconvenient to disassemble and assemble, it is not convenient to adapt to the movement of the spherical bearing, and the sealing effect needs to be improved. Therefore, we propose a piston rod head sealing device to solve the problems mentioned above. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a piston rod head sealing device that is easy to assemble and disassemble, prevents water leakage, has a waterproof gasket to protect the connection point, accommodates the movement of the spherical bearing, and ensures a good seal.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a piston rod head sealing device, comprising a piston rod body and a joint bearing:

[0007] The piston rod body is connected to the outer end of the piston rod body, and the front and rear ends of the piston rod body are fixed with connecting plates. The connecting plates are provided with sealing grooves, and the piston rod body is provided with connecting holes.

[0008] A waterproof gasket is attached to the outer side of the spherical bearing with waterproof adhesive. A connecting ring is fixed to the outer end of the waterproof gasket, and a sealing rubber ring is fixed to the outer side of the connecting ring. Screw holes are opened at equal angles inside the connecting ring, and screws are installed inside the screw holes.

[0009] The above technical solution facilitates disassembly and assembly, prevents water leakage, and the waterproof gasket protects the connection points, accommodates the movement of the spherical bearing, and ensures a sealing effect.

[0010] As a preferred embodiment of this utility model, the connecting piece has screw holes opened at equal angles inside, and the screw holes opened inside the connecting piece are located outside the sealing groove.

[0011] By adopting the above technical solution, since the connecting piece has screw holes at equal angles inside, the screw holes in the connecting piece correspond one-to-one with the screw holes in the connecting ring, which facilitates docking.

[0012] As a preferred embodiment of this invention, the sealing rubber ring is located inside the sealing groove.

[0013] By adopting the above technical solution, since the sealing rubber ring is located inside the sealing groove, the connection is sealed by the sealing rubber ring.

[0014] As a preferred embodiment of this invention, the connecting ring is fixedly connected to the connecting piece by screws.

[0015] By adopting the above technical solution, the connecting ring is fixedly connected to the connecting piece by screws, making it convenient to assemble and disassemble the connecting ring and the connecting piece.

[0016] As a preferred embodiment of this utility model, the middle part of the joint bearing is located inside the connecting hole provided in the rod head body.

[0017] By adopting the above technical solution, since the middle part of the spherical bearing is located in the connecting hole provided in the rod head body, the spherical bearing is installed on the rod head body.

[0018] As a preferred embodiment of this invention, the outer end of the spherical bearing protrudes beyond the waterproof gasket.

[0019] By adopting the above technical solution, since the outer end of the spherical plain bearing protrudes from the waterproof gasket, the waterproof gasket does not hinder the movement of the spherical plain bearing.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. After the spherical bearing is placed inside the rod head body, the sealing rubber ring is inserted into the sealing groove, and the connecting piece and connecting ring are fixed by screws for easy disassembly and assembly;

[0022] 2. Use sealing rubber rings, sealing grooves, and waterproof gaskets to protect the connection between the joint bearing and the rod head body to prevent water leakage;

[0023] The waterproof gasket is made of rubber or plastic material and can deform. When the spherical bearing moves, the waterproof gasket can protect the joint and adapt to the movement of the spherical bearing to ensure a sealing effect. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the first axial side structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the axial section structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the connection structure between the connecting piece and the rod head body of this utility model;

[0028] Figure 4 This is a schematic diagram of the connection structure between the connecting ring and the waterproof pad of this utility model;

[0029] Figure 5 This is a schematic diagram of the second axial side structure of the present invention.

[0030] In the diagram: 1. Piston rod body; 2. Rod head body; 3. Connecting plate; 4. Sealing groove; 5. Spherical bearing; 6. Waterproof gasket; 7. Connecting ring; 8. Sealing rubber ring; 9. Screw; 10. Screw hole. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-5 The present invention provides the following technical solution: a piston rod head sealing device, comprising a piston rod body 1, a rod head body 2, a connecting piece 3, a sealing groove 4, a spherical bearing 5, a waterproof pad 6, a connecting ring 7, a sealing rubber ring 8, a screw 9, and a screw hole 10.

[0033] like Figure 1 , Figure 3 and Figure 5 As shown, the piston rod body 1 is connected to the rod head body 2 at its outer end, and the front and rear ends of the rod head body 2 are fixed with connecting plates 3. The connecting plates 3 have a sealing groove 4 inside, and the connecting plates 3 have screw holes 10 at equal angles inside, and the screw holes 10 inside the connecting plates 3 are located outside the sealing groove 4.

[0034] The shaft head body 2 has a connecting hole inside. The middle part of the spherical bearing 5 is located in the connecting hole inside the shaft head body 2. A waterproof pad 6 is attached to the outer side of the spherical bearing 5 with waterproof adhesive. The outer end of the spherical bearing 5 protrudes from the waterproof pad 6. A connecting ring 7 is fixed to the outer end of the waterproof pad 6. A sealing rubber ring 8 is fixed to the outer side of the connecting ring 7. The sealing rubber ring 8 is located inside the sealing groove 4. Screw holes 10 are opened at equal angles inside the connecting ring 7. Screws 9 are installed inside the screw holes 10. The connecting ring 7 is fixedly connected to the connecting piece 3 by the screws 9.

[0035] When assembling, place the middle part of the spherical bearing 5 into the connecting hole inside the rod head body 2. At this time, there are connecting rings 7 on both the front and rear sides of the rod head body 2. Insert the sealing rubber ring 8 on the connecting ring 7 into the sealing groove 4. Align the screw hole 10 in the connecting ring 7 with the screw hole 10 in the connecting piece 3. Then insert the screw 9 into the aligned screw hole 10. Fix the connecting ring 7 and the connecting piece 3 with the screw 9 to facilitate assembly and disassembly.

[0036] The connection between the sealing rubber ring 8 and the sealing groove 4, and the waterproof pad 6 protect the connection between the joint bearing 5 and the clubhead body 2, preventing water from entering the connection between the joint bearing 5 and the clubhead body 2. The sealing rubber ring 8 and the waterproof pad 6 ensure that water can still be prevented from entering when the joint bearing 5 is moving. The waterproof pad 6 is made of rubber and plastic materials.

[0037] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A piston rod head sealing device, comprising a piston rod body (1) and a spherical bearing (5), characterized in that: The piston rod body (1) is connected to the rod head body (2) at its outer end, and the front and rear ends of the rod head body (2) are fixed with connecting pieces (3). The connecting pieces (3) have a sealing groove (4) inside, and the rod head body (2) has a connecting hole inside. The outer side of the spherical bearing (5) is attached to a waterproof pad (6) by waterproof adhesive. A connecting ring (7) is fixed to the outer end of the waterproof pad (6), and a sealing rubber ring (8) is fixed to the outer side of the connecting ring (7). The connecting ring (7) has screw holes (10) at equal angles inside, and screws (9) are installed inside the screw holes (10).

2. The piston rod head sealing device according to claim 1, characterized in that: The connecting piece (3) has screw holes (10) at equal angles inside, and the screw holes (10) inside the connecting piece (3) are located outside the sealing groove (4).

3. The piston rod head sealing device according to claim 1, characterized in that: The sealing rubber ring (8) is located inside the sealing groove (4).

4. The piston rod head sealing device according to claim 1, characterized in that: The connecting ring (7) is fixedly connected to the connecting piece (3) by screws (9).

5. A piston rod head sealing device according to claim 1, characterized in that: The middle part of the spherical bearing (5) is located in the connecting hole inside the rod head body (2).

6. A piston rod head sealing device according to claim 1, characterized in that: The outer end of the spherical bearing (5) protrudes from the waterproof pad (6).

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