Z-shaped anti-falling sealing element

Abstract

The utility model discloses a Z-shaped anti-falling sealing element which comprises a sealing ring body and a supporting framework arranged in the sealing ring body, the two sides of the sealing ring body extend to form an outer lip and an inner lip respectively, and the supporting framework sequentially comprises an extending part, an arc block, a connecting plate and a square block from outside to inside. The circular arc block is fixed to one end of the connecting plate, the extending part is fixed to the end, away from the connecting plate, of the circular arc block, the extending part is arranged in the outer lip, the square block is fixed to the other end of the connecting plate, and the square block is arranged in an inclined mode. The outer lip is lack of rigidity, and the stability of contact with the bearing and the binding force of installation are poor.

Description

Technical Field

[0001] The utility model relates to the technical field of seals, and particularly relates to a Z-shaped anti-detachment seal. Background Technique

[0002] A bearing seal ring is an important component for preventing grease leakage and external contaminants from entering the bearing interior to ensure that the bearing can operate safely and durably under required conditions. Bearing seal rings can be divided into two types according to the contact form: contact type and non-contact type. The non-contact seal ring has no direct contact with the rolling elements and is suitable for high-speed rotation scenarios; while the contact seal ring is directly pressed on the shaft, with better sealing performance, but higher frictional torque and temperature rise.

[0003] During the design of existing seal rings, a skeleton is installed inside. Through the skeleton, the seal ring is strengthened, enabling the seal ring to maintain its shape and necessary tension. Due to the limitation of the thickness of the existing skeleton by the thickness of the seal ring, when the design of the skeleton thickness is restricted, changing the shape of the skeleton is an important way to improve the rigidity of the seal ring. The skeletons of existing seal rings are mostly L-shaped structures. For example, the skeletons adopted in the prior art CN203285858U and the prior art CN215720270U are both L-shaped structures. Although the existing L-shaped skeletons increase the elasticity of the seal ring, they lack support for the outer lip of the seal ring, resulting in a lack of rigidity at the outer lip, poor stability in contact with the bearing, and poor bonding force during installation. A solution is proposed for the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a Z-shaped anti-detachment seal, which solves the problems that the L-shaped skeleton of the existing seal ring lacks support for the outer lip of the seal ring, resulting in a lack of rigidity at the outer lip, poor stability in contact with the bearing, and poor bonding force during installation as proposed in the above background technique.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions:

[0006] A Z-shaped anti-detachment seal includes a seal ring main body and a support skeleton arranged inside the seal ring. Outer lips and inner lips respectively extend from both sides of the seal ring main body. The support skeleton includes an extension part, an arc block, a connecting plate, and a square block from outside to inside. The arc block is fixed to one end of the connecting plate. The extension part is fixed to the end of the arc block away from the connecting plate. The extension part is arranged inside the outer lip. The square block is fixed to the other end of the connecting plate, and the square block is arranged obliquely.

[0007] Preferably, a first inclined surface is provided on one side of the outer lip, and the first inclined surface is arranged at an angle of 40°.

[0008] Preferably, a pressure relief groove is provided at the top of the outer lip.

[0009] Preferably, inclined surfaces II and III are provided on the side wall of the inner lip, and an inner groove is provided on the bottom side wall of the inner lip.

[0010] Preferably, the support skeleton forms a Z-shaped structure through the extension part, the arc block and the connecting plate.

[0011] Beneficial effects: In this application, an extension part is added on the basis of the existing L-shaped skeleton, so that the support skeleton becomes a Z-shaped structure. By designing the prominent extension part in the outer lip, the rigidity of the outer lip of the sealing ring can be enhanced, that is, the stability of contact with the bearing can be improved. Under the same application scenarios and sealing effects, the installation bonding force between the sealing ring with the Z-shaped skeleton and the bearing is 1.5 times higher than that of the L-shaped skeleton. That is, the bearing installed with the sealing ring of the Z-shaped skeleton can withstand 1.5 times the destructive vibration of the L-shaped one. The sealing ring with the Z-shaped skeleton can be better applied in relatively harsh scenarios. Description of the Drawings

[0012] Figure 1 It is a cross-sectional structural schematic diagram of the sealing ring body of the present utility model;

[0013] Figure 2 It is a partial structural schematic diagram of the sealing ring shown in the embodiment;

[0014] Figure 3 It is a structural schematic diagram of the support skeleton shown in the embodiment.

[0015] Reference numerals: 1, sealing ring body; 2, support skeleton; 3, outer lip; 4, inner lip; 5, extension part; 6, arc block; 7, connecting plate; 8, square block; 9, inclined surface I; 10, pressure relief groove; 11, inclined surface II; 12, inclined surface III; 13, inner groove. Detailed Embodiments

[0016] As Figures 1 to 3 shown, a Z-shaped anti-detachment seal includes a sealing ring body 1. Outer lips 3 and inner lips 4 extend from both sides of the sealing ring body 1 respectively. The sealing ring body 1, the outer lips 3 and the inner lips 4 are all made of rubber. The sealing ring body 1 is in interference fit with the sealing groove of the outer ring of the bearing by installing the outer lips 3, and the inner lips 4 are in interference fit with the sealing groove of the inner ring of the bearing. During the assembly process, both the outer lips 3 and the inner lips 4 will be squeezed to produce compressive deformation, and the outer lips 3 and the inner lips 4 are assembled in cooperation through the elastic force generated by the rubber elastic deformation.

[0017] One side of the outer lip 3 is provided with a first inclined surface 9, and the inclined surface is set at an angle of 40°. By providing the first inclined surface 9 on the outer lip 3, a guiding function is achieved, which facilitates the assembly of the outer lip 3. A decompression groove 10 is provided at the top of the outer lip 3, and the decompression groove 10 plays a role in decompression. When the interference fit between the outer ring of the bearing and the outer lip 3 is large, the decompression groove 10 is compressed, and the outer lip 3 can move towards the decompression groove 10, thus facilitating installation. At the same time, the decompression groove 10 can also eliminate defects such as deformation of the sealing ring and non-concentricity that may occur when excessive force is applied during assembly, making the seal in a stable state.

[0018] The side wall of the inner lip 4 is provided with a second inclined surface 11 and a third inclined surface 12, and an inner groove 13 is provided at the bottom side wall of the inner lip 4. The inner lip 4 also plays a guiding and facilitating assembly role by providing the second inclined surface 11 and the third inclined surface 12.

[0019] A support skeleton 2 is installed inside the sealing ring. By installing the support skeleton 2, the sealing ring body 1 can be strengthened, enabling the sealing ring to maintain its shape and necessary tension. The support skeleton 2 includes an extension part 5, an arc block 6, a connecting plate 7, and a square block 8 from outside to inside. The support skeleton 2 forms a Z-shaped structure through the extension part 5, the arc block 6, and the connecting plate 7.

[0020] One end of the arc block 6 is fixed to the connecting plate 7. The design of the arc block 6 and the connecting plate 7 helps to fix the support skeleton 2 to the sealing ring body 1, enhancing the stability of the overall structure. The extension part 5 is fixed to the end of the arc block 6 away from the connecting plate 7. The extension part 5 is arranged inside the outer lip 3. By designing the extension part 5, the support skeleton 2 becomes a Z-shaped structure. By designing the protruding extension part 5 in the outer lip 3, the rigidity of the outer lip 3 of the sealing ring can be enhanced, that is, the stability of contact with the bearing can be improved. In the same application scenario and sealing effect, the installation bonding force between the sealing ring with a Z-shaped skeleton and the bearing is 1.5 times higher than that of an L-shaped skeleton. That is, the bearing with a Z-shaped skeleton sealing ring can withstand 1.5 times the destructive vibration of an L-shaped one. The sealing ring with a Z-shaped skeleton can be better applied in relatively harsh scenarios. The square block 8 is fixed to the other end of the connecting plate 7. The square block 8 is arranged in an inclined shape. This design helps to more effectively disperse and absorb forces when the sealing ring is under pressure, reducing local stress concentration, thereby improving the durability and reliability of the sealing ring. The design of the square block 8 helps to improve the installation bonding force between the sealing ring body 1 and the bearing, enabling the sealing ring body 1 to be more firmly fixed on the bearing and reducing the risk of falling off due to vibration or impact.

Claims

1. A Z-shaped anti-detachment seal, comprising a seal ring body (1) and a support skeleton (2) arranged inside the seal ring, characterized in that, On both sides of the sealing ring body (1), an outer lip (3) and an inner lip (4) extend respectively. The support skeleton (2) consists of an extension part (5), an arc block (6), a connecting plate (7) and a square block (8) from outside to inside. The arc block (6) is fixed to one end of the connecting plate (7), the extension part (5) is fixed to the end of the arc block (6) away from the connecting plate (7), the extension part (5) is arranged inside the outer lip (3), the square block (8) is fixed to the other end of the connecting plate (7), and the square block (8) is arranged in an inclined shape.

2. The Z-shaped anti-detachment seal according to claim 1, characterized in that, On one side of the outer lip (3), a first inclined surface (9) is provided, and the first inclined surface (9) is arranged at an angle of 40°.

3. The Z-shaped anti-detachment seal according to claim 1, characterized in that, On the top of the outer lip (3), a pressure relief groove (10) is provided.

4. A Z-shaped anti-detachment seal according to claim 1, wherein, On the side wall of the inner lip (4), a second inclined surface (11) and a third inclined surface (12) are provided, and an inner groove (13) is provided on the bottom side wall of the inner lip (4).

5. The Z-shaped anti-detachment seal according to claim 1, characterized in that, The support skeleton (2) forms a Z-shaped structure through the extension part (5), the arc block (6) and the connecting plate (7).

Images