Easy-to-install hole seals

Abstract

The present invention aims at the shortcomings of the sealing ring in the prior art that the sealing effect is affected by the opening, and proposes an easy-to-install hole sealing ring, which belongs to the technical field of sealing rings and includes a circular ring sealing ring body, on which a stretchable and automatically reset connecting section is provided. The stretchable connecting section can lengthen the circumference of the sealing ring when the sealing ring is stretched, so that the sealing ring can be easily sleeved on the shaft without the help of tools. The stretchable connecting section in the present invention can lengthen the circumference of the sealing ring when the sealing ring is stretched, so that the sealing ring can be easily sleeved on a shaft with a larger inner diameter than the sealing ring without the help of tools.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing rings, and in particular relates to a sealing ring for a hole which is easy to install. Background Art

[0002] The hole seal ring is the most widely used seal in mechanical equipment, and is installed in the groove on the shaft when in use. In the natural state, the inner diameter of the seal ring is smaller than the outer diameter of the shaft to be sealed, resulting in the need to rely on tooling to expand the seal ring and install it on the shaft to be sealed when installing the seal ring. Therefore, a utility model patent with patent number CN201320594038.7 appeared, disclosing an open O-shaped seal ring, which is an open annular rubber product. The open O-shaped seal ring has an open rubber annular body with a circular cross section. The circumference of the inner circumference of the open O-shaped seal ring is smaller than the circumference of the matched shaft. The open rubber annular body has a spiral spring skeleton whose axis along the circumference is on the same circumferential axis as the axis along the circumference of the open rubber annular body. One end of the spiral spring skeleton is connected to a spiral spring skeleton connector extending from one end face of the open rubber annular body. The spiral spring skeleton connector is a short section of spiral spring whose pitch matches the pitch of the spiral hole in the spiral spring skeleton.

[0003] The sealing ring opening in this solution is installed on the shaft and then the openings at both ends of the sealing ring are connected to each other through a spiral spring frame connector. Although the installation is easy, the sealing ring has an opening, which is prone to leakage. Especially in situations where the liquid pressure is high, the opening of the sealing ring will become a breakthrough point for leakage, affecting the sealing effect. Summary of the invention

[0004] Aiming at the defect that the sealing ring in the prior art has an opening and affects the sealing effect, the present invention provides a sealing ring for a hole which is easy to install.

[0005] To achieve the above-mentioned purpose, the present invention provides an easy-to-install hole sealing ring, comprising a circular ring sealing ring body, on which a stretchable and automatically reset connecting section is provided. The stretchable connecting section can lengthen the circumference of the sealing ring when the sealing ring is stretched, and when there is no external force to stretch it, the connecting section can automatically return to the initial position, so that the sealing ring can be easily sleeved in the groove on the shaft without the help of a tool.

[0006] Preferably, the connecting section includes a first connecting section and a second connecting section whose width is smaller than the width of the sealing ring body. The first connecting section and the second connecting section are fixedly connected by a third connecting section. When not stretched by external force, the first connecting section, the second connecting section and the third connecting section are parallel to each other and attached together, and the second connecting section is located between the first connecting section and the third connecting section.

[0007] Preferably, the width of the first connecting section, the second connecting section, and the third connecting section are all one-third of the width of the sealing ring body, so the tensions they can withstand are also the same. At the same time, the width of the first connecting section, the second connecting section, and the third connecting section when attached together is the same as the width of the sealing ring body, and the external forces that the connecting sections can withstand are the same as those of the sealing ring body.

[0008] Preferably, one side of the first connecting section is flush with one side of the sealing ring body, and one side of the second connecting section is flush with the other side of the sealing ring body. The width of the first connecting section and the second connecting section on one side of the sealing ring body will not exceed the width of the sealing ring body.

[0009] Preferably, the angle formed between the first connecting section and the sealing ring body is a first right angle, and the angle formed between the second connecting section and the sealing ring body is a second right angle.

[0010] Preferably, the angle formed by the outer sides of the connection between the first connecting segment and the third connecting segment is a third right angle, and the angle formed by the outer sides of the connection between the second connecting segment and the third connecting segment is a fourth right angle. When not stretched by external force, the third right angle coincides with the first right angle, and the fourth right angle coincides with the second right angle.

[0011] Preferably, the cross section of the sealing ring is a rectangle. For a sealing ring with a rectangular cross section, the thickness between the inner and outer rings of the sealing ring is the same, the thickness on both sides of the width of the sealing ring is the same, the force-bearing surfaces are on the same horizontal plane, the pressure at each point of the force-bearing surface is the same, and the wear of the pressure-bearing surface of the sealing ring will be more even.

[0012] As a preference, the length of the connecting section does not exceed 10% of the circumference of the sealing ring. The width of the connecting section in the stretched state is only one-third of the width of the sealing ring body. If the length of the connecting section is too long, it will affect the overall strength of the sealing ring. If it is controlled within 10% of the circumference of the sealing ring, the influence on the strength of the sealing ring will be small.

[0013] As a preference, the sealing ring is elastic, so that the sealing ring has better sealing interference ability when installed on the shaft, and the connecting section can be quickly and automatically folded together after being stretched.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the stretchable connecting section can lengthen the circumference of the sealing ring when the sealing ring is stretched, and when there is no external force to stretch it, the connecting section can automatically return to the initial position, so that the sealing ring can be easily mounted on a shaft that is larger than the inner diameter of the sealing ring without the aid of tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention in a stretched state;

[0016] Figure 2It is a schematic diagram of the structure of the present invention when it is not stretched;

[0017] Figure 3 It is a cross-sectional schematic diagram of the present invention;

[0018] Figure 4 It is the installation schematic diagram of the present invention;

[0019] Figure 5 This is a state diagram after the present invention is installed on the shaft.

[0020] Markings in the figure: 1. Sealing ring body; 2. First connecting section; 3. Second connecting section; 4. Third connecting section; 5. First right angle; 6. Second right angle; 7. Third right angle; 8. Fourth right angle; 9. Shaft; 10. Sealing ring installation groove; 11. Shaft hole; 12. O-ring. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0022] like Figures 1 to 5 As shown, a sealing ring for a hole that is easy to install is made of elastic plastic. It includes a circular ring sealing ring body 1, on which a stretchable connecting section is provided. The connecting sections include a first connecting section 2, a second connecting section 3 and a third connecting section 4, each of which has a width of one third of the width of the sealing ring body 1. The first connecting section 2 and the second connecting section 3 are fixedly connected by the third connecting section 4. One side of the first connecting section 2 is flush with one side of the sealing ring body 1, and one side of the second connecting section 3 is flush with the other side of the sealing ring body 1. When not stretched by external force, the first connecting section 2, the second connecting section 3, and the third connecting section 4 are parallel to each other, and the second connecting section 3 is located between the first connecting section 2 and the third connecting section 4. When the first connecting section 2, the second connecting section 3, and the third connecting section 4 are attached to each other, the width is the same as the width of the sealing ring body 1, so the external force that the connecting sections can withstand is the same as that of the sealing ring body 1. The angle formed between the first connecting section 2 and the sealing ring body 1 is a first right angle 5, and the angle formed between the second connecting section 3 and the sealing ring body 1 is a second right angle 6. The angle formed by the outer sides of the connection between the first connecting segment 2 and the third connecting segment 4 is a third right angle 7, and the angle formed by the outer sides of the connection between the second connecting segment 3 and the third connecting segment 4 is a fourth right angle 8. When not stretched by external force, the third right angle 7 coincides with the first right angle 5, and the fourth right angle 8 coincides with the second right angle 6.

[0023] When the present invention is used, an O-ring corresponding to the size is first installed in the sealing ring installation groove 10, and then the sealing ring body 1 is stretched open, and the connecting section is stretched open, so that the circumference of the sealing ring body 11 becomes larger, and the sealing ring can be easily installed on the shaft 9 with a larger inner diameter than the sealing ring without the aid of tools. After the sealing ring 1 is installed in the sealing ring installation groove 10, the tension at both ends of the connecting section is released, and the connecting section is automatically restored to the folded state by the elastic retraction force of the sealing ring, and the inner wall of the sealing ring and the bottom of the sealing ring installation groove 10 on the shaft 9 are tightly fitted.

[0024] The shaft 9 with the sealing ring installed is generally installed in the shaft hole 11. The shaft 9 moves back and forth in the shaft hole 11 along the axial direction of the shaft 9. In order to reduce friction, lubrication can be used between the shaft hole 11 and the shaft 9. The inner diameter of the shaft hole 11 is larger than the outer diameter of the shaft 9. The gap between the shaft hole 11 and the shaft 9 is sealed by the sealing ring. The outer diameter surface of the sealing ring and the inner diameter surface of the shaft hole 11 are tightly fitted. The inner diameter surface of the sealing ring and the O-ring in the sealing ring installation groove 10 of the shaft 9 are tightly fitted, and the depth of the sealing ring installation groove 10 is less than the sum of the thickness of the sealing ring and the diameter of the O-ring. The elasticity of the O-ring is used to form a pre-pressure. The pressure of the fluid will push against the O-ring, which makes the elastic O-ring expand radially. The force generated can better fit the sealing ring on the shaft hole. The sealing ring body 1 is partially in the sealing ring installation groove 10 and partially between the shaft 9 and the shaft hole 11. The sealing ring installation groove 10 defines that the position of the sealing ring on the shaft 9 is fixed.

[0025] The space between the shaft 9 and the shaft hole 11 sealed by the sealing ring is filled with pressurized fluid (such as hydraulic oil), and the pressure of the fluid will push against the sealing ring. Figure 5 In the direction indicated by the dotted arrow, the first connecting section 2, the second connecting section 3, and the third connecting section 4 that fit each other on the connecting section fit more tightly under the action of oil pressure, and the gaps between the first connecting section 2, the second connecting section 3, and the third connecting section become smaller and smaller, and it becomes more difficult for the fluid to enter these gaps. In addition, the first right angle 5 formed between the first connecting section 2 and the sealing ring body 1 coincides with the third right angle 7 on the outside of the connection between the first connecting section 2 and the third connecting section 4, and the second right angle 6 formed between the second connecting section 3 and the sealing ring body 1 coincides with the fourth right angle 8 on the outside of the connection between the second connecting section 3 and the third connecting section 4. The gap between the two right angles can be called the outflow channel of the fluid, but the right angle can well block the flow of the fluid. There is no channel for the fluid to continue to flow to the other side of the sealing ring at the connection between the first connecting section 2 and the third connecting section 4 or the connection between the second connecting section 3 and the third connecting section 4. The fluid can only be blocked on one side of the sealing ring, and the sealing effect is the same as that of the sealing ring body 1.

[0026] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A sealing ring for a hole which is easy to install, characterized in that: It comprises a circular annular sealing ring body (1), wherein the sealing ring body (1) is provided with a stretchable and automatically resettable connecting section; The connecting section comprises a first connecting section (2) and a second connecting section (3) whose width is smaller than the width of the sealing ring body (1); the first connecting section (2) and the second connecting section (3) are fixedly connected via a third connecting section (4); when not stretched by external force, the first connecting section (2), the second connecting section (3) and the third connecting section (4) are parallel to each other and attached together; the second connecting section (3) is located between the first connecting section (2) and the third connecting section (4); One side of the first connecting section (2) is flush with one side of the sealing ring body (1), and one side of the second connecting section (3) is flush with the other side of the sealing ring body (1).

2. The easily installed hole sealing ring according to claim 1, characterized in that: The width of the first connecting section (2), the second connecting section (3) and the third connecting section (4) are all one third of the width of the sealing ring body (1).

3. The easily installed hole sealing ring according to claim 1, characterized in that: The angle formed between the first connecting section (2) and the sealing ring body (1) is a first right angle (5), and the angle formed between the second connecting section (3) and the sealing ring body (1) is a second right angle (6).

4. The easily installed hole sealing ring according to claim 1, characterized in that: The angle formed by the outer sides of the connection between the first connection section (2) and the third connection section (4) is a third right angle (7), and the angle formed by the outer sides of the connection between the second connection section (3) and the third connection section (4) is a fourth right angle (8). When not stretched by external force, the third right angle (7) coincides with the first right angle (5), and the fourth right angle (8) coincides with the second right angle (6).

5. The easily installed hole sealing ring according to claim 1, characterized in that: The cross section of the sealing ring body (1) is rectangular.

6. The easily installed hole sealing ring according to claim 1, characterized in that: The length of the connecting section does not exceed 10% of the circumference of the sealing ring.

7. The easily installed hole sealing ring according to claim 1, characterized in that: The sealing ring is elastic.

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