CN2384043Y - The structure of anti-mud composite rotary oil seal - Google Patents

Abstract

The utility model discloses a structure of a mud-resistant composite rotary shaft seal, which comprises: a sleeve surrounding a rotary shaft, a metal ring suitable for the size of the oil seal, a flat panel and a main oil seal lip close to the outer surface of the sleeve; through the above composition, the whole can achieve the effects of dustproof, mud-proof, weed-proof and oil leakage-proof, has good sealing performance, and can increase the service life of the machine.

Description

The structure of anti-mud composite rotary oil seal

The utility model relates to the structure of a mud-resistant composite rotary oil seal, which is related to the structure of the rotary shaft oil seal. The structure of the mud compound rotary oil seal with good performance, no oil leakage and no mud entering the oil tank belongs to the sealing device.

As we all know, at present, generally in response to the action of the machine, there are components such as oil seals on the shaft, mainly to prevent the internal lubricating oil from leaking during the action, and to prevent the intrusion of dust, mud and weeds from damaging the internal parts. However, the current market The above oil seal structure often has the following disadvantages during implementation:

1. The poor sealing performance of the oil seal not only prevents the infiltration of dirt, mud and weeds, but also makes the internal

Oxidation, corrosion and wear of machine parts.

2. The lubricating oil inside the oil seal may leak, and it is often necessary to replenish the oil from time to time, resulting in waste.

3. It is necessary to check the condition of the internal parts frequently, and the maintenance and repair costs are high.

In addition, there is a double-cone oil seal structure, although it replaces the current oil seal device, and also improves the disadvantages of the previous oil seal, but this structure is also suitable for large size and high cost. Promote apps.

In order to overcome the above disadvantages, the purpose of this utility model is to design a structure of anti-mud composite rotary oil seal, which has good sealing performance and is suitable for various types of machinery, so that the lubricating oil in the machinery does not leak, waste, and use Supplementary oil, weeds and dirt will not invade the inside of the machine to protect the machine parts. It is wear-resistant, corrosion-resistant, low in cost and cheap, and can be widely used on any driving rotating shaft, and is easy to assemble and disassemble.

The utility model relates to a mud-resistant compound rotary oil seal structure, which comprises: a sleeve surrounding the rotating shaft, a metal ring suitable for the size of the oil seal, a flat panel and a main body leaning against the outer surface of the sleeve. oil seal lip; where,

The sleeve system contains:

an inner end,

an outer end,

an engageable inner diameter of the rotating shaft,

a sleeve outer surface,

a sleeve flange extending from the outer end of the sleeve to the outer edge of the sleeve flange,

a circular rubber lip extending axially to the outer surface of the sleeve flange,

a rubber peripheral lip extending from the outer edge of the sleeve flange into contact;

The metal ring system contains:

a metal ring body,

Upon contact with the inner surface of the rubber circumferential lip,

an outer surface of a metal ring,

the outer end of a metal ring,

the inner end of a metal ring,

A metal ring skirt extends radially outward to the outer end of the oil seal,

a ferrule inner flange extending from the ferrule body to the sleeve and having a central opening,

at least one main oil seal lip in contact with the outer surface of the sleeve;

The flat panel system includes:

inside a panel,

one panel outer surface,

a central opening slightly larger than the inside diameter of the sleeve,

The inner surface of the flat panel is glossy and parallel to the metal ring skirt and sleeve flange,

the panel fits over the ferrule skirt and contacts the lip;

With the composition of the above components, the whole can achieve the effect of dustproof, mudproof and oil leakage prevention, and the service life can be increased.

Wherein, the panel is made of metal, and a dirt-scraping rubber ring is provided at the central opening.

Wherein, the panel is riveted and attached to the skirt of the metal ring.

Wherein, the circular rubber lip is divided into two parts, from the sleeve surface to the inner surface of the panel.

Wherein, the shape of each circular rubber lip is a triangular section.

Wherein, the angle between the sleeve face and the triangular face lip is an acute angle.

The utility model has the advantages of reasonable structure, easy assembly and disassembly, good sealing performance and long service life, and can be widely applied to rotating shafts of various driving machines that need to be sealed.

The utility model has the following drawings:

Fig. 1 is the schematic diagram of the cross-section of the utility model.

Fig. 2 is a schematic diagram of an embodiment of the utility model.

The numbers in the figure are as follows:

20. Oil seal 21. Rotary shaft

22. Sleeve 24. Inner end of sleeve

26. Outer end of sleeve 28. Inner diameter of sleeve

30. Sleeve inner diameter rubber covering 32. Sleeve flange

34. Outer edge of sleeve flange 36. Round rubber lip

38. Outer surface of sleeve flange 40. Rubber peripheral lip

50. Oil seal metal ring 52. Metal ring body

54. Metal ring outer surface 56. Metal ring rubber covering

58. The contact surface of the circumferential lip 60. The outer end of the metal ring

62. Ferrule inner end 64. Ferrule skirt

66. Metal ring inner flange 68. Reinforcing piece

70. Main oil seal lip 72. Outer surface of sleeve

74. Tension spring 75. Dust-proof lip at the middle end of the sleeve

76. Sleeve front dust lip 77. Sleeve flange dust lip

78. Metal ring rubber covering chamfer 79. Combined buffer groove

80. Grease 81. Panel

82. The inner surface of the panel 83. The outer surface of the panel

84. Inner surface of sleeve flange 86. Mud scraping rubber ring

88. Periphery of panel assembly 90. Radial groove of sleeve

92. External chamfering of the sleeve 94. Internal chamfering of the sleeve

96. Internal chamfering of metal ring 98. Internal chamfering of face lip

101. Turbine drive combination diagram 102. Axle box cover

104. Bearing 106. Turbine drive shaft

Hereby give embodiment and cooperate accompanying drawing to illustrate as follows:

First of all, please refer to Fig. 1, the structure of a mud-resistant composite rotary oil seal of the present invention mainly includes: a sleeve 22 surrounding the rotating shaft 21, an oil seal metal ring 50 suitable for the oil seal 20 and a A plane panel 81 and a main oil seal lip 70 leaning against the outer surface of the sleeve 22; wherein,

The sleeve 22 comprises: an inner end 24, an outer end 26, a sleeve inner diameter 28 engageable with the rotating shaft 21, a sleeve outer surface 72, and a sleeve flange 32 extending radially and self-contained. At the outer end 26 of the sleeve 22, until the outer edge 34 of the sleeve flange, a circular rubber lip 36 extends coaxially to the outer surface 38 of the sleeve flange, and a rubber circumferential lip 40 extends from the outer edge of the sleeve flange 34 extended contacts;

The metal ring 50 of the oil seal includes: a surface 58 in contact with the rubber circumferential lip 40, an outer surface 54 of the metal ring, an outer end 60 of the metal ring, an inner end 62 of the metal ring, and a skirt portion 64 of the metal ring facing the outer diameter. extends to the outer end 60 of the metal ring; a metal ring inner flange 66 is located between the outer end 60 of the metal ring and the inner end 62 of the metal ring, and extends to cover the whole metal ring body 52, and at least one sleeve outer surface 72 contacts the main body Oil seal lip 70;

The plane panel 81 is composed of: a panel inner surface 82, a panel 81 outer surface 83, a central opening slightly larger than the inner diameter of the sleeve 22, the inner surface of the plane panel 81 is shiny, and parallel to the metal ring skirt 64 and the sleeve convex Edge 32, the panel 81 is mounted on the ferrule skirt 64 and contacts the face lip 36;

When assembled, the sleeve inner diameter 28 between the sleeve inner end 24 and the sleeve outer end 26 is covered with a sleeve inner diameter rubber cover 30, and the sleeve inner diameter rubber cover 30 reduces the leakage rate and damage to lowest. The sleeve bead 32 extends radially from the sleeve outer end 26 , and its sleeve flange 32 is provided with a sleeve flange outer edge 34 on its outer periphery. At least one, and preferably two, lips 36 extend from the outer surface 38 of the sleeve flange.

The oil seal metal ring 50 is arranged on the outside of the sleeve 22 and includes a metal ring body 52. The purpose is to make the outer surface 54 of the metal ring suitable for the oil seal 20 to penetrate. The outer surface 54 of the metal ring is attached with a metal ring rubber cover 56 to provide Oil seal 20 reduces the situation of oil leakage.

The metal ring inner end 62 extends axially to the metal ring outer end 60 and the metal ring skirt 64, and radially extends from the metal ring outer end 60; the metal ring inner flange 66 extends from the metal ring body 52 to The sleeve 22; the inner flange 66 of the metal ring has a central opening suitable for the rotation shaft 21 and the sleeve 22; the inner flange 66 of the metal ring is pulled out from the reinforcing piece 68 as much as possible to form a double-layer object .

The main oil seal lip 70 is provided on the inner flange 66 of the metal ring, and extends radially from the inside of the two sides of the inner flange, and the main oil seal lip 70 is in contact with the outer surface 72 of the sleeve, and is The function of the main component of the oil seal lip 70 is to prevent the built-in oil from changing and flowing out of the assembly to cause oil leakage; and its main oil seal lip 70 is set on the outer surface 72 of the sleeve by means of a tension spring 74, the sleeve The outer surface 72 can reduce the wear and tear friction of the main oil seal lip 70 and appear bright.

In addition, other oil seal components are located outside the main oil seal lip 70 in the axial direction. These additional oil seal lip components are interposed between the inner flange 66 of the metal ring and the outer surface 72 of the sleeve, and the middle end of the sleeve is The dust-proof lip 75 is roughly located between the inner flange 66 of the metal ring and the outer surface 72 of the sleeve, and the dust-proof lip 76 at the front end of the sleeve is against the outer surface 72 of the sleeve and is seated against the sleeve flange 32 The sleeve flange dust lip 77 extends from the metal ring inner flange 66 and contacts the sleeve flange 32, and the metal ring rubber covers 56, the main oil seal lip 70, the middle end dust lip 75 of the sleeve, The dust-proof lip 76 at the front end of the sleeve and the dust-proof lip 77 of the sleeve flange cover the metal ring body 52 and the inner flange 66 of the metal ring in a bonding manner.

On the inner end 62 of the ferrule body 52, the ferrule rubber covering 56 has a ferrule rubber covering chamfer 78 to prevent accurate positioning and damage when the oil seal 20 is installed.

And a combined buffer groove 79 is a metal ring rubber cover 56 and is close to the metal ring skirt 64, and this combined buffer groove 79 can buffer the axial pressure when the oil seal 20 is inserted into the hole.

The main body of the oil seal 20 is composed of three main components: the sleeve 22, the oil seal metal ring 50 and the panel 81, and these three components are made of stainless steel or other metal materials, processed by known processing techniques to form them, and matched with rubber materials Make its surface present low roughness and smooth surface.

And need to pass through four steps when oil seal 20 is finished:

1. Squeeze the lubricating grease into the inner flange 66 of the metal ring, the lips and the skirt of the metal ring

64 rooms;

2. Put the sleeve 22 into the oil seal metal ring 50, the purpose is to make the dust-proof lip 77 of the sleeve flange

Contact sleeve flange 32 and peripheral lip 40;

3. Grease 80 is squeezed into the face lip 36 and the outermost part of the face lip 36 and the 40 circumferential lips;

4. The panel 81 is attached to the metal ring skirt 64 by riveting or other methods to complete it at one time.

After the panel 81 is attached to the ferrule skirt 64 , the inner surface 82 of the panel contacts the lip 36 and the inner surface 84 of the sleeve flange is connected to the dust-proof lip 77 of the sleeve flange accordingly.

And a soil scraping rubber ring 86 is then connected on the opening at the center of the panel 81 to prevent mud from entering;

And the panel combination periphery 88 of the panel 81 is then installed on the metal ring skirt 64 according to this riveting method.

The radial groove 90 of the sleeve includes a sleeve inner diameter rubber cover 30, which can buffer the tangential pressure when the sleeve 20 is connected to the rotating shaft 21, and the outer and inner surfaces of the sleeve 22 are provided with a sleeve external chamfer 92, the inner chamfer 94 of the sleeve can reduce the impact and accurately locate; similarly, a metal ring inner chamfer 96 is also established on the oil seal metal ring 50 on its inner end, and the same effect can be obtained.

And the innermost part of this face lip 36 has an acute angle cusp, in order to obtain such shape, then must comprise one side lip lower part chamfer 98 and just can reach satisfactory degree.

Furthermore, please refer to shown in Figure 2, which is a schematic diagram of an embodiment of the present utility model. This figure is a turbine drive assembly diagram 101, and the oil seal 20 is inserted into a shaft box cover 102 hole and a bearing 104 is provided inside for rotation. In this way, the oil seal 20 can surround the turbine drive shaft 106 to prevent dirt, mud, and weeds from entering and damaging the components and preventing oil leakage.

It is worth mentioning that the oil seal of this utility model is mainly used on mechanical oil seals of engineering vehicles and agricultural machinery vehicles, and this utility model has a number of special effects, which can be applied to muddy water, dusty, swampy areas Or the grassy working environment can really prevent oil leakage, mud infiltration, dust intrusion and weeds from being involved in the machine parts, so as to increase the service life of the machine.

Claims (6)

1. A structure of anti-mud compound rotary oil seal, characterized in that it contains: a sleeve surrounding the rotating shaft, a metal ring suitable for the size of the oil seal, a flat panel and an outside of the sleeve surface of the main oil seal lip; where, The sleeve system contains: an inner end, an outer end, an engageable inner diameter of the rotating shaft, a sleeve outer surface, a sleeve flange extending from the outer end of the sleeve to the outer edge of the sleeve flange, a circular rubber lip extending axially to the outer surface of the sleeve flange, a rubber peripheral lip extending from the outer edge of the sleeve flange into contact; The metal ring system contains: a metal ring body, Upon contact with the inner surface of the rubber circumferential lip, an outer surface of a metal ring, the outer end of a metal ring, the inner end of a metal ring, A metal ring skirt extends radially outward to the outer end of the oil seal, a ferrule inner flange extending from the ferrule body to the sleeve and having a central opening, at least one main oil seal lip in contact with the outer surface of the sleeve, The flat panel system includes: inside a panel, one panel outer surface, a central opening slightly larger than the inside diameter of the sleeve, The inner glossy flat panel, and parallel to the ferrule skirt and sleeve flange, The panel is mounted on the metal ring skirt and contacts the face lip. 2. The structure of a mud-resistant compound rotary oil seal according to claim 1, wherein, the panel made of metal has a mud-scraping rubber ring at the central opening. 3. The structure of a mud-resistant compound rotary oil seal according to claim 1, wherein the panel is riveted and attached to the skirt of the metal ring. 4. The structure of a mud-resistant composite rotary oil seal according to claim 1, wherein the circular rubber lip is divided into two parts, from the sleeve surface to the inner surface of the panel. 5. The structure of a mud-resistant composite rotary oil seal according to claim 4, wherein each circular rubber lip is shaped like a triangular section. 6. The structure of a mud-resistant composite rotary oil seal according to claim 5, wherein the angle between the sleeve face and the triangular face lip is an acute angle.

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