Outer side lip-shaped rotary sealing ring

Abstract

The utility model relates to an outer side lip-shaped rotary sealing ring which comprises a sealing ring body (1), the sealing ring body (1) comprises an assembly supporting part (1.1), a middle connecting part (1.2) and a sealing lip part (1.3) which are sequentially arranged from inside to outside, the sealing lip part (1.3) comprises a rotary main lip (1.3. 1) and a rotary auxiliary lip (1.3. 2), and a framework (2) is arranged in the sealing ring body (1). According to the outer side lip-shaped rotary sealing ring, the main lip and the inner cylindrical face of the rotary shell are sealed, grease in the rotary shell is prevented from leaking, meanwhile, the auxiliary lip and the lower end face of the rotary shell are sealed, the effects of secondary sealing and dust prevention are achieved, and the sealing performance is greatly improved.

Description

Technical Field

[0001] The utility model discloses an outer lip-shaped rotary sealing ring, which is mainly used for oil-proof sealing of a rotary reducer. Background Art

[0002] The rotary reducer is a full-circle rotary reduction transmission mechanism that integrates a driving power source. It uses a slewing bearing as a transmission follower and a mechanism attachment. The active part, the driving source and the cover are attached to one of the inner and outer circles of the slewing bearing, and the other circle is used as both a transmission follower and a connection base for the driven working parts. In this way, the slewing bearing itself is a full-circle rotary connection part, and the driving power source and the main transmission parts are efficiently configured, making it a universal reduction transmission mechanism that integrates rotation, reduction and driving functions while having a simple structure and is easy to manufacture and maintain.

[0003] Currently, the rotating lip seal ring is fixedly installed from the outside, and the sealing lip is located on the inside of the seal ring for sealing the internal rotating shaft. A spring is sleeved on the sealing lip. This mechanism has obvious shortcomings for external rotating parts. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an outer lip-shaped rotary sealing ring for the above-mentioned prior art, wherein the main lip is sealed with the inner cylindrical surface of the rotating shell to prevent grease leakage inside the rotating shell, and at the same time, the auxiliary lip is sealed with the lower end surface of the rotating shell to achieve secondary sealing and dustproof effects, thereby greatly improving the sealing performance.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is: an outer lip-shaped rotary sealing ring, which includes a sealing ring body, the sealing ring body includes an assembly support part, an intermediate connecting part and a sealing lip arranged in sequence from the inside to the outside, the sealing lip includes a rotating main lip and a rotating auxiliary lip, and a skeleton is arranged in the sealing ring body.

[0006] Optionally, the rotating main lip and the rotating auxiliary lip are arranged up and down.

[0007] Optionally, the rotating main lip may be single or multiple, and the rotating auxiliary lip may be single or multiple.

[0008] Optionally, the skeleton is completely disposed inside the sealing ring body or partially exposed outside the sealing ring body.

[0009] Optionally, the frame is arranged between the assembly support portion and the middle connecting portion.

[0010] Optionally, the skeleton is L-shaped.

[0011] Optionally, the frame includes a vertical portion and a horizontal portion, the vertical portion is arranged in the assembly support portion, and the horizontal portion is arranged in the middle connecting portion.

[0012] Optionally, the assembly support portion is located inside the rotation axis of the rotary sealing ring, and the sealing lip portion is located outside the rotation axis of the rotary sealing ring.

[0013] Optionally, the skeleton is located inside the rotation axis of the rotating sealing ring.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] The utility model discloses an outer lip-shaped rotary sealing ring, wherein the main lip is sealed with the inner cylindrical surface of a rotary shell to prevent grease leakage inside the rotary shell, and at the same time, the auxiliary lip is sealed with the lower end surface of the rotary shell to achieve secondary sealing and dustproof effects, thereby greatly improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of an outer lip-shaped rotary sealing ring.

[0017] Figure 2 The utility model is a schematic diagram of the installation position of an outer lip-shaped rotary seal ring.

[0018] in:

[0019] Sealing ring body 1

[0020] Assembly support part 1.1

[0021] Intermediate connection 1.2

[0022] Sealing lip 1.3

[0023] Rotating main lip 1.3.1

[0024] Rotating auxiliary lip 1.3.2

[0025] Skeleton 2

[0026] Vertical part 2.1

[0027] Horizontal section 2.2

[0028] Rotating seal 3

[0029] Grease 4

[0030] Base 5

[0031] Slewing bearing 6

[0032] Inner ring 6.1

[0033] Outer ring 6.2

[0034] Rolling element 6.3

[0035] First sealing ring 7

[0036] Second sealing ring 8

[0037] The third sealing ring 9. DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0039] like Figure 1 , Figure 2 As shown, an outer lip-shaped rotary seal ring in this embodiment comprises a seal ring body 1, wherein the seal ring body 1 comprises an assembly support portion 1.1, an intermediate connecting portion 1.2 and a sealing lip portion 1.3 arranged in sequence from the inside to the outside, wherein the sealing lip portion 1.3 comprises a rotating main lip 1.3.1 and a rotating auxiliary lip 1.3.2, and a skeleton 2 is arranged inside the seal ring body 1;

[0040] The rotating main lip 1.3.1 and the rotating auxiliary lip 1.3.2 are arranged up and down;

[0041] A certain angle is formed between the rotating main lip 1.3.1 and the rotating auxiliary lip 1.3.2;

[0042] The rotating main lip 1.3.1 may be single or multiple, and the rotating auxiliary lip 1.3.2 may be single or multiple;

[0043] The frame 2 is completely disposed inside the sealing ring body 1 or partially exposed outside the sealing ring body 1;

[0044] The frame 2 is arranged between the assembly support portion 1.1 and the intermediate connection portion 1.2;

[0045] The skeleton 2 is L-shaped;

[0046] The frame 2 comprises a vertical portion 2.1 and a horizontal portion 2.2, wherein the vertical portion 2.1 is arranged in the assembly support portion 1.1, and the horizontal portion 2.2 is arranged in the middle connection portion 1.2;

[0047] The assembly support portion 1.1 is located inside the rotation axis of the rotary seal ring, and the sealing lip portion 1.3 is located outside the rotation axis of the rotary seal ring;

[0048] The skeleton 2 is located inside the rotation axis of the rotary sealing ring.

[0049] Working principle:

[0050] The slewing reducer consists of a worm, a slewing bearing (composed of a slewing bearing outer ring, a slewing bearing inner ring, rolling elements, and a slewing bearing seal), a housing (or base), and a seal. The slewing bearing inner ring is connected to the housing (base), and a seal is provided on the connection surface. The inner and outer rings of the slewing bearing achieve relative rotation through rolling elements (steel balls). There is a seal (sealing strip or oil seal) between the inner and outer rings of the slewing bearing, and a rotating seal is provided between the outer ring of the slewing bearing and the housing (base).

[0051] The seal between the inner ring of the slewing bearing and the housing (base), the seal between the inner and outer rings of the slewing bearing, and the rotating seal ring between the outer ring of the slewing bearing and the housing (base) form a sealed cavity. The thinner grease in the sealed cavity acts on the inner side of the rotating seal ring due to its own weight and rotates with the housing. Figure 2 shown.

[0052] The rotating seal ring assembly support part has an interference fit with the outer ring of the slewing bearing, and the skeleton supports the overall rigidity of the rotating seal ring. The rotating main lip has a large interference fit with the inner cylindrical surface of the rotating shell (base), realizing the sealing of the rotary reducer cavity. The rotating auxiliary lip has a small interference fit with the lower end surface of the shell (base), realizing the auxiliary seal of the rotary reducer to prevent oil, and at the same time, it can prevent external dust and rainwater from entering the rotary reducer cavity, realizing dust and water proofing functions.

[0053] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. An outer lip rotating seal ring, Features: It comprises a sealing ring body (1), the sealing ring body (1), the sealing ring body (1) comprising an assembly support portion (1.1), an intermediate connection portion (1.2) and a sealing lip portion (1.3) arranged in sequence from the inside to the outside, the sealing lip portion (1.3) comprising a rotating main lip (1.3.1) and a rotating auxiliary lip (1.3.2), and a skeleton (2) is arranged inside the sealing ring body (1).

2. An outer lip rotary seal ring according to claim 1, Features: The rotating main lip (1.3.1) and the rotating auxiliary lip (1.3.2) are arranged up and down.

3. An outer lip rotary seal ring according to claim 1, Features: The rotating main lip (1.3.1) may be single or multiple, and the rotating auxiliary lip (1.3.2) may be single or multiple.

4. An outer lip rotary seal ring according to claim 1, Features: The frame (2) is completely disposed inside the sealing ring body (1) or partially exposed outside the sealing ring body (1).

5. An outer lip rotary seal ring according to claim 4, Features: The frame (2) is arranged between the assembly support portion (1.1) and the middle connection portion (1.2).

6. An outer lip rotary seal ring according to claim 5, Features: The frame (2) is L-shaped.

7. An outer lip rotary seal ring according to claim 6, Features: The frame (2) comprises a vertical portion (2.1) and a horizontal portion (2.2); the vertical portion (2.1) is arranged in the assembly support portion (1.1), and the horizontal portion (2.2) is arranged in the middle connecting portion (1.2).

8. An outer lip rotary seal ring according to claim 1, Features: The assembly support portion (1.1) is located inside the rotation axis of the rotary sealing ring, and the sealing lip portion (1.3) is located outside the rotation axis of the rotary sealing ring.

9. An outer lip rotary seal ring according to claim 1, Features: The skeleton (2) is located inside the rotation axis of the rotating sealing ring.

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