Rubber framework oil seal

Abstract

The utility model relates to the technical field of oil seals, in particular to a rubber framework oil seal which comprises an oil seal supporting framework, a rubber ring is arranged on the inner wall of the oil seal supporting framework, a dustproof lip is arranged on the outer wall of the oil seal supporting framework, an annular groove is formed in the middle of the outer wall of the dustproof lip, and limiting annular grooves are formed in the positions, on the two sides of the annular groove, of the outer wall of the dustproof lip. Limiting hoops are arranged in the limiting ring grooves; according to the rubber framework oil seal, the dustproof lip and the oil seal supporting framework are combined and fixed, the limiting hoop is matched with the dustproof lip in a sleeved mode, the influence of deformation and looseness of the oil seal supporting framework and the dustproof lip is reduced, and the oil seal supporting framework and oil seal objects of different sizes can be tightly installed in an inserted mode under cooperation of the object oil seal and the rubber ring; and under the cooperation of the sealing inner ring and the sealing outer ring, double-layer plugging cooperation is carried out, the contact area is increased, and the plugging stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seals, in particular to a rubber skeleton oil seal. Background Art

[0002] Skeleton oil seal is a typical representative of oil seal. Generally speaking, oil seal refers to skeleton oil seal. The function of oil seal is generally to isolate the parts that need lubrication in the transmission parts from the external environment to prevent the lubricating oil from leaking.

[0003] The utility model with the announcement number CN218644803U discloses a skeleton oil seal, comprising an oil seal rubber member, a seal detection mechanism, a spring mounting groove, and an oil seal skeleton; the seal detection mechanism is disposed on the outer periphery of the oil seal rubber member; the spring mounting groove is an annular groove structure, and is provided on the inner side of the oil seal rubber member; the oil seal skeleton is a T-shaped annular structure;

[0004] In the above technical solution, the oil seal skeleton is fixedly connected to the inside of the oil seal rubber part, which prevents external dust from entering the inside of the oil seal rubber part, reduces the influence of thermal expansion and contraction on the oil seal, makes the connection between the oil seal skeleton and the oil seal rubber part tighter, ensures the sealing effect of the oil seal rubber part, and facilitates the detection of the sealing condition of the oil seal rubber part; however, when the oil seal rubber part is continuously sealed and isolated for a long time, it will cause deformation for a long time, which cannot increase the tightness of the seal, and does not have a double-layer tight sealing fit, which is not conducive to increasing the stability of the seal isolation. Utility Model Content

[0005] The purpose of the utility model is to provide a rubber skeleton oil seal to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A rubber skeleton oil seal comprises an oil seal support skeleton, a rubber ring is provided on the inner wall of the oil seal support skeleton, a dust lip is provided on the outer wall of the oil seal support skeleton, an annular groove is provided in the middle of the outer wall of the dust lip, limiting ring grooves are provided on both sides of the annular groove on the outer wall of the dust lip, and limiting hoops are provided in the limiting ring grooves.

[0008] Furthermore, the cross-section of the rubber ring is convex, and the middle of the rubber ring is hollowed out. The bottom of the rubber ring is welded and fixed to the bottom of the oil seal support frame, and the gap between the rubber ring and the oil seal support frame is a deformation seam.

[0009] In the utility model, the provision of the rubber ring increases the tightness of the fit of the inner ring of the oil seal support frame, thereby increasing the sealing performance. With the cooperation of the deformation seam, it helps to squeeze and fit, is suitable for sealing objects of different sizes, and has resilience.

[0010] Specifically, a plurality of anti-skid grooves are provided on the upper surface of the oil seal support frame. The anti-skid grooves are in the shape of arc grooves. The top of the dust lip is welded and fixed to the top of the oil seal support frame.

[0011] In the utility model, the cooperation of multiple anti-slip grooves helps to provide a fulcrum, which facilitates the installation and coordination of the oil seal support frame with external objects. The dust lip and the oil seal support frame are installed in combination to increase the sealing performance of the oil seal support frame, prevent external dust and sand from entering the oil seal position, and weld and fix to increase the stability of the combined installation.

[0012] It should be noted that the width of the inner wall of the limiting ring groove is adapted to the width of the outer wall of the limiting hoop, the outer wall of the limiting hoop is flush with the outer wall of the dust lip, and the annular groove is an annular arc groove.

[0013] In the utility model, the two limiting hoops cooperate with each other and are engaged with the limiting ring groove, thereby increasing the overall sealing tightness of the oil seal support frame and reducing deformation and relaxation caused by long-term support, which affects the tight oil seal fit.

[0014] Furthermore, a sealing inner ring is provided at the middle of the outer wall of the oil seal support frame, and a convex ring is provided at the outer end of the sealing inner ring.

[0015] In the utility model, under the cooperation of the sealing inner ring and the convex ring, the outer wall of the oil seal support frame and the side wall of the oil seal object are closely fitted, thereby increasing the frictional force cooperation.

[0016] Specifically, sealing outer rings are provided on the inner wall of the dust lip on both sides of the sealing inner ring, and the sealing outer ring and the dust lip are an integrally formed structure.

[0017] In the present invention, the two sealing outer rings are arranged crosswise with the sealing inner ring, thereby increasing the contact area of the inner wall of the dust lip, thereby performing a tight double-layer sealing on the oil seal object, reducing the impact of oil leakage on the overall oil seal fit.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The utility model fixes the dust lip and the oil seal support frame together, and the limit hoop is sleeved with the dust lip to reduce the effect of the oil seal support frame and the dust lip on the oil seal of the object caused by deformation and relaxation. With the cooperation of the rubber ring, it is helpful for the oil seal support frame to be tightly plugged and installed with oil seal objects of different sizes. With the cooperation of the sealing inner ring and the sealing outer ring, double-layer sealing is carried out to increase the contact area and enhance the stability of the sealing.

[0020] 2. The utility model increases the fulcrum by setting the anti-skid groove, which helps to install and match the oil seal support frame with the oil seal object through the anti-skid groove. With the cooperation of the annular groove, the contact area is increased, which helps to insert the dust lip into the oil seal object and increase the stability of the seal. The convex ring and the sealing outer ring are staggered to increase the contact area of the oil seal, thereby increasing the oil seal liquid storage and stabilizing the oil seal fit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic bottom view of the entire utility model;

[0023] Figure 3 This is a schematic diagram of the combined structure of the limiting hoop and the dustproof lip of the utility model;

[0024] Figure 4 This is a schematic diagram of the combined structure of the oil seal support frame and the rubber ring of the utility model;

[0025] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the present utility model.

[0026] The meaning of each number in the figure is:

[0027] 1. Oil seal support frame; 10. Anti-skid groove; 11. Sealing inner ring; 110. Convex ring;

[0028] 2. Rubber ring; 20. Deformation seam;

[0029] 3. Dust lip; 30. Annular groove; 31. Limiting ring groove; 32. Sealing outer ring;

[0030] 4. Limiting hoop. DETAILED DESCRIPTION

[0031] The following will be combined with the 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.

[0032] See also Figure 1-Figure 5 , this embodiment provides a technical solution:

[0033] A rubber skeleton oil seal includes an oil seal support skeleton 1. A rubber ring 2 is provided on the inner wall of the oil seal support skeleton 1. The cross-section of the rubber ring 2 is convex, and the middle of the rubber ring 2 is hollow. The bottom of the rubber ring 2 is welded and fixed to the bottom of the oil seal support skeleton 1. The gap between the rubber ring 2 and the oil seal support skeleton 1 is a deformation gap 20.

[0034] In the present invention, the provision of the rubber ring 2 increases the tightness of the inner ring of the oil seal support frame 1, thereby increasing the sealing performance. With the cooperation of the deformation gap 20, it helps to squeeze and fit, is suitable for sealing objects of different sizes, and has resilience.

[0035] Furthermore, a dust lip 3 is provided on the outer wall of the oil seal support frame 1, and a plurality of anti-skid grooves 10 are opened on the upper surface of the oil seal support frame 1. The anti-skid grooves 10 are in the shape of arc grooves, and the top of the dust lip 3 is welded and fixed to the top of the oil seal support frame 1.

[0036] In the present invention, the cooperation of multiple anti-slip grooves 10 helps to provide a fulcrum, which facilitates the installation and coordination of the oil seal support frame 1 with external objects. The dust lip 3 is installed in combination with the oil seal support frame 1 to increase the sealing performance of the oil seal support frame 1, and prevent external dust and sand from entering the oil seal position. The welding fixation increases the stability of the combined installation.

[0037] Specifically, an annular groove 30 is provided in the middle of the outer wall of the dust lip 3 , and limiting annular grooves 31 are provided on both sides of the annular groove 30 on the outer wall of the dust lip 3 , and limiting hoops 4 are provided in the limiting annular grooves 31 .

[0038] It should be noted that the width of the inner wall of the limiting ring groove 31 is adapted to the width of the outer wall of the limiting hoop 4 , the outer wall of the limiting hoop 4 is flush with the outer wall of the dust lip 3 , and the annular groove 30 is an annular arc groove.

[0039] In the present invention, the two limiting hoops 4 cooperate with each other and engage with the limiting ring groove 31 to increase the overall sealing tightness of the oil seal support frame 1 and reduce deformation and relaxation caused by long-term support, which affects the tight oil seal fit.

[0040] Furthermore, a sealing inner ring 11 is provided at the middle of the outer wall of the oil seal support frame 1 , and a convex ring 110 is provided at the outer end of the sealing inner ring 11 .

[0041] In the present invention, the cooperation between the sealing inner ring 11 and the convex ring 110 increases the close fit between the outer wall of the oil seal support frame 1 and the side wall of the oil seal object, thereby increasing the friction fit.

[0042] Specifically, sealing outer rings 32 are provided on both sides of the sealing inner ring 11 on the inner wall of the dust lip 3 , and the sealing outer ring 32 and the dust lip 3 are an integrally formed structure.

[0043] In the present invention, the two sealing outer rings 32 are arranged crosswise with the sealing inner ring 11 to increase the contact area of the inner wall of the dust lip 3, thereby performing a tight double-layer sealing on the oil seal object and reducing the impact of oil leakage on the overall oil seal fit.

[0044] When using the rubber skeleton oil seal of this embodiment, the user first assembles and fixes the rubber ring 2 to the oil seal support frame 1, leaving a deformation gap 20 between the rubber ring 2 and the oil seal support frame 1. The dust lip 3 with the annular groove 30 is assembled and fixed to the oil seal support frame 1. Then, the limiting hoop 4 is inserted into the limiting ring groove 31. The sealing inner ring 11 with the protruding ring 110 is assembled and connected to the oil seal support frame 1. The two sealing outer rings 32 are located on both sides of the sealing inner ring 11 and are assembled and connected to the dust lip 3.

[0045] When it is necessary to seal the oil-sealed object, the oil seal support frame 1 and the dust lip 3 are inserted into the corresponding oil seal port of the object, and the oil sealing liquid is filled between the dust lip 3 and the oil seal support frame 1. With the cooperation of the sealing inner ring 11 and the sealing outer ring 32, double-layer sealing is performed, and with the cooperation of the rubber ring 2, it helps to combine and connect the whole with objects of different sizes. With the cooperation of the limiting hoop 4, the tightness between the dust lip 3 and the oil seal support frame 1 is increased, and the overall looseness affecting the sealing is reduced. The anti-slip groove 10 provides a fulcrum, which helps the overall installation or disassembly.

Claims

1. A rubber skeleton oil seal, comprising an oil seal support skeleton (1), characterized in that: A rubber ring (2) is provided on the inner wall of the oil seal support frame (1), a dustproof lip (3) is provided on the outer wall of the oil seal support frame (1), an annular groove (30) is provided in the middle of the outer wall of the dustproof lip (3), and limiting ring grooves (31) are provided on both sides of the annular groove (30) on the outer wall of the dustproof lip (3), and limiting hoops (4) are provided in the limiting ring grooves (31).

2. The rubber skeleton oil seal according to claim 1, characterized in that: The cross-section of the rubber ring (2) is convex, and the middle of the rubber ring (2) is a hollow structure. The bottom of the rubber ring (2) is welded and fixed to the bottom of the oil seal support frame (1), and the gap between the rubber ring (2) and the oil seal support frame (1) is a deformation gap (20).

3. The rubber skeleton oil seal according to claim 1, characterized in that: The upper surface of the oil seal support frame (1) is provided with a plurality of anti-skid grooves (10), the anti-skid grooves (10) are in the shape of circular arc grooves, and the top of the dust lip (3) is welded and fixed to the top of the oil seal support frame (1).

4. The rubber skeleton oil seal according to claim 1, characterized in that: The width of the inner wall of the limiting ring groove (31) is adapted to the width of the outer wall of the limiting hoop (4), the outer wall of the limiting hoop (4) is flush with the outer wall of the dustproof lip (3), and the annular groove (30) is an annular arc groove.

5. The rubber skeleton oil seal according to claim 1, characterized in that: A sealing inner ring (11) is provided at the middle of the outer wall of the oil seal support frame (1), and a convex ring (110) is provided at the outer end of the sealing inner ring (11).

6. The rubber skeleton oil seal according to claim 5, characterized in that: Sealing outer rings (32) are provided on both sides of the sealing inner ring (11) on the inner wall of the dustproof lip (3), and the sealing outer ring (32) and the dustproof lip (3) are an integrally formed structure.

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