Electromagnetic clutch bearing sealing ring

Abstract

The utility model discloses a bearing sealing ring of an electromagnetic clutch. A V-shaped lip part, an elastic ring part and an outer lip are sequentially arranged on the sealing ring from inside to outside; an opening of the V-shaped lip part faces the bearing inner ring; wherein the V-shaped lip part comprises a first connecting lip and a supplementing lip which are used for forming a V-shaped opening, and the supplementing lip is located on the side, away from the bearing, of the first connecting lip; when the first connecting lip abuts against the inner ring of the bearing for sealing, the elastic ring part elastically deforms towards the outer side of the bearing, so that the supplementing lip does not make contact with the inner ring of the bearing. By arranging the first connecting lip and the supplementing lip, when the sealing ring is installed at the initial stage, only the first connecting lip abuts against the bearing inner ring for sealing, the supplementing lip and the bearing inner ring are sealed again along with abrasion of the first connecting lip, abrasion of the sealing ring is fully considered, the sealing effect of the sealing ring is improved, and the service life of the sealing ring is prolonged; and the service life and the replacement period of the bearing are prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing rings, and in particular relates to a sealing ring for an electromagnetic clutch bearing. Background Art

[0002] Electromagnetic clutch bearing is a special bearing, mainly used in the electromagnetic clutch part of the automobile air conditioning system. This bearing is usually used in the electromagnetic clutch part of the automobile air conditioning compressor, installed near the engine, and needs to face harsh working conditions such as high temperature, dust and moisture. Therefore, the bearing needs to adopt a stable sealing structure to ensure that it has good sealing performance.

[0003] The Chinese patent document with publication number CN200978889Y discloses a sealing unit for an electromagnetic clutch bearing of an automobile air-conditioning compressor, comprising a colloid, an outer ring, an inner ring and a sealing ring. When assembled, the outer ring band of the sealing ring is interference-fitted with the outer ring band of the outer ring groove of the electromagnetic clutch bearing of the automobile air-conditioning compressor, the radial main lip of the sealing ring is in radial contact with the outer ring band rib of the inner ring groove, and the axial main lip of the sealing ring is in axial contact with the outer ring band wall of the inner ring groove.

[0004] The above patent solution uses axial main lips and radial main lips for sealing. Although it can achieve a certain sealing effect, it does not take into account the normal wear of the axial main lips and radial main lips. After the axial main lips and radial main lips are worn, they no longer contact the bearings, resulting in sealing failure, which in turn shortens the service life of the bearings. The electromagnetic clutch bearing is used near the engine, so it is extremely inconvenient to replace the electromagnetic clutch bearing or the sealing ring. Utility Model Content

[0005] In order to overcome the technical problem in the prior art that the electromagnetic clutch bearing sealing ring will fail to seal due to wear after long-term use; one purpose of the utility model is to provide an electromagnetic clutch bearing sealing ring, by arranging a first connection lip and a supplementary lip on the sealing ring, after the sealing ring is installed, only the first connection lip contacts and seals with the bearing, and as the first connection lip wears, the supplementary lip gradually moves to contact and seal with the bearing under the elastic action of the sealing ring, thereby extending the service life of the sealing ring.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the sealing ring is provided with a V-shaped lip, an elastic ring portion, and an outer lip in sequence from the inside to the outside; the opening of the V-shaped lip faces the inner ring of the bearing; wherein the V-shaped lip includes a first contact lip and a supplementary lip for forming a V-shaped opening, and the supplementary lip is located on the side of the first contact lip away from the bearing; when the first contact lip is sealed against the inner ring of the bearing, the elastic ring portion elastically deforms toward the outside of the bearing so that the supplementary lip does not contact the inner ring of the bearing.

[0007] That is, when the sealing ring is installed on the bearing, the first connection lip abuts against the inner ring of the bearing, and the elastic deformation of the elastic ring portion causes the supplementary lip to tilt outward until it is no longer in contact with the inner ring of the bearing. The first connection lip seals the bearing while also being subject to wear. As the wear continues, the supplementary lip is folded toward the inner ring of the bearing under the elastic force of the elastic ring portion until it abuts against the inner ring of the bearing. Even if the first connection lip is worn and can no longer seal the bearing, the supplementary lip will fill the gap and seal again, thereby improving the sealing performance of the sealing ring and extending the service life of the bearing and the sealing ring.

[0008] Optionally, an acute angle between the first connection lip and the elastic ring portion is greater than an acute angle between the supplementary lip and the elastic ring portion.

[0009] Optionally, the outward extension length of the first lip is greater than the outward extension length of the supplementary lip.

[0010] During the design and production process, the extension length of the first connection lip / the supplementary lip, or the angle between the first connection lip / the supplementary lip and the elastic ring portion is adjusted according to the contour shape of the corresponding outer wall of the bearing inner ring, so that when the first connection lip is tightly sealed against the bearing inner ring, the elastic ring portion is elastically deformed until the supplementary lip does not contact the bearing inner ring.

[0011] Preferably, the thickness of the end of the first connection lip is smaller than the thickness of the root of the first connection lip; the root of the first connection lip is the connection position between the first connection lip and the elastic ring part.

[0012] When the first connection lip abuts against the inner ring of the bearing, it can prevent stress concentration at the root of the first connection lip, causing the first connection lip to fold, thereby ensuring that the elastic ring portion folds outward until the supplementary lip does not abut against the inner ring of the bearing.

[0013] Preferably, the thickness of the end of the supplementary lip is greater than the thickness of the root of the supplementary lip; the root of the supplementary lip is the connection position between the supplementary lip and the elastic ring portion.

[0014] The greater thickness of the supplementary lip can ensure that the supplementary lip can withstand more lasting wear, thereby increasing the service life of the sealing ring.

[0015] Specifically, an embedded ring is coaxially arranged at one end of the sealing ring facing the bearing; a frame is coaxially arranged inside the embedded ring; two clamping edges are arranged on the outer side of the embedded ring; and the two clamping edges are respectively clamped with the inner wall and the outer wall of the frame.

[0016] Furthermore, an embedded ring is coaxially arranged at one end of the sealing ring facing the bearing; a frame is coaxially arranged inside the embedded ring; two clamping edges are arranged on the outer side of the embedded ring; and the two clamping edges are respectively clamped with the inner wall and the outer wall of the frame.

[0017] Specifically, the thickness of the clamping edge clamped with the inner wall of the frame is greater than the thickness of the clamping edge clamped with the outer wall of the frame; the clamping edge clamped with the inner wall of the frame is provided with an inner convex ring extending in the direction of the bearing.

[0018] Specifically, two compression rings are provided at one end of the skeleton facing the bearing; the two compression rings are coaxial with the skeleton; the two compression rings are respectively an inner compression ring positioned on the inner wall of the skeleton, and an outer compression ring positioned on the outer wall of the skeleton; the height of the outer compression ring along the axial direction of the skeleton is greater than the height of the inner compression ring along the axial direction of the skeleton.

[0019] The skeleton increases the deformation resistance of the sealing ring, and the compression ring increases the deformation resistance of the skeleton. The skeleton is first inserted into the inner card edge, and then inserted into the outer card edge. The inner card edge has a large thickness and extends in the opposite direction of the bearing, so the connection strength is also higher, while the outer card edge is easy to assemble.

[0020] Compared with the prior art, the beneficial effect of the utility model is that by setting the initial connection lip and the supplementary lip, at the initial stage of installation of the sealing ring, only the initial connection lip is in contact with the inner ring of the bearing for sealing. As the initial connection lip wears, the supplementary lip is sealed with the inner ring of the bearing again, which fully takes the wear of the sealing ring into consideration, increases the sealing effect and service life of the sealing ring, blocks the penetration of external dust and sand and internal lubricating grease, and thereby extends the service life and replacement cycle of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a radial cross-sectional schematic diagram of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the initial installation of the sealing ring of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the utility model after the first connecting lip is worn.

[0025] In the figure: 1, bearing; 11, groove; 2, sealing ring; 21, elastic ring portion; 22, first lip; 221, wear area; 23, supplementary lip; 231, reserved gap; 24, clamping edge; 25, inner convex ring; 26, outer lip; 3, frame; 31, folding ring. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0027] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise specified and limited, the terms "setting", "installation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See also Figure 1-Figure 4 , an electromagnetic clutch bearing sealing ring, the sealing ring 2

[0031] The sealing ring 2 is provided with a V-shaped lip, an elastic ring 21, and an outer lip 26 from the inside to the outside; the opening of the V-shaped lip 21 faces the inner ring of the bearing; the V-shaped lip 21 includes a first lip 22 and a supplementary lip 23 for forming a V-shaped opening, and the supplementary lip 23 is located on the side of the first lip 22 away from the bearing; when the first lip 22 is pressed against the inner ring of the bearing for sealing, the elastic ring 21 is elastically deformed toward the outside of the bearing so that the supplementary lip 23 does not contact the inner ring of the bearing. Shrinkage rings are provided at both ends of the outer wall of the inner ring of the bearing 1; a groove 11 is provided between the shrinkage ring and the inner ring of the bearing; the first lip 22 is pressed against the inner wall of the groove 11, and the supplementary lip 23 is pressed against the outer wall of the shrinkage ring.

[0032] The acute angle between the first connection lip 22 and the elastic ring portion 21 is greater than the acute angle between the supplementary lip 23 and the elastic ring portion 21; the thickness of the end of the first connection lip 22 is less than the thickness of the root of the first connection lip 22; the root of the first connection lip 22 is the connection position between the first connection lip 22 and the elastic ring portion 21; the thickness of the end of the supplementary lip 23 is greater than the thickness of the root of the supplementary lip 23; the root of the supplementary lip 23 is the connection position between the supplementary lip 23 and the elastic ring portion 21.

[0033] An embedded ring is coaxially arranged at one end of the sealing ring 2 facing the bearing; a skeleton 3 is coaxially arranged inside the embedded ring; two clamping edges 24 respectively clamped with the inner and outer walls of the skeleton 3 are arranged on the outer side of the embedded ring; the clamping edge 24 clamped with the inner wall of the skeleton 3 is provided with an inner convex ring 25 extending toward the bearing direction.

[0034] Two compression rings 31 are provided at one end of the skeleton 3 facing the bearing; the two compression rings 31 are coaxial with the skeleton 3; the two compression rings 31 are respectively an inner compression ring positioned on the inner wall of the skeleton 3, and an outer compression ring positioned on the outer wall of the skeleton 3; the height of the outer compression ring along the axial direction of the skeleton 3 is greater than the height of the inner compression ring along the axial direction of the skeleton 3.

[0035] like Figure 3 As shown, when the sealing ring 2 is installed on the bearing 1, the first lip 22 abuts against the inner ring of the bearing 1, and the elastic ring portion 21 elastically deforms to cause the supplementary lip 23 to tilt outward until it is no longer in contact with the inner ring of the bearing 1, and a reserved gap 231 is provided between the supplementary lip 23 and the inner ring of the bearing 1.

[0036] like Figure 4 As shown, as the bearing 1 is used, the first lip 22 is worn and the end of the first lip 22 is worn away, that is, the worn area 221 shown in the figure. The elastic ring portion 21 gradually recovers under the action of its own elastic force, so that the supplementary lip 23 is against the bearing 1.

[0037] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. An electromagnetic clutch bearing seal ring, characterized in that: The sealing ring is provided with a V-shaped lip, an elastic ring and an outer lip in sequence from the inside to the outside; the opening of the V-shaped lip faces the inner ring of the bearing; wherein the V-shaped lip includes a first contact lip and a supplementary lip for forming a V-shaped opening, and the supplementary lip is located on the side of the first contact lip away from the bearing; when the first contact lip is sealed against the inner ring of the bearing, the elastic ring is elastically deformed toward the outside of the bearing, so that the supplementary lip does not contact the inner ring of the bearing.

2. The sealing ring according to claim 1, characterized in that: The acute angle between the first connection lip and the elastic ring portion is greater than the acute angle between the supplementary lip and the elastic ring portion.

3. The sealing ring according to claim 1 or 2, characterized in that: The outward extension length of the first lip is greater than the outward extension length of the supplementary lip.

4. The sealing ring according to claim 1 or 2, characterized in that: The thickness of the end of the first connection lip is smaller than the thickness of the root of the first connection lip; the root of the first connection lip is the connection position between the first connection lip and the elastic ring part.

5. The sealing ring according to claim 1 or 2, characterized in that: The thickness of the end of the supplementary lip is greater than the thickness of the root of the supplementary lip; the root of the supplementary lip is the connection position between the supplementary lip and the elastic ring part.

6. The sealing ring according to claim 1 or 2, characterized in that: Shrink rings are arranged at both ends of the outer wall of the bearing inner ring; a groove is arranged between the shrink ring and the bearing inner ring; the first connection lip abuts against the inner wall of the groove, and the supplementary lip abuts against the outer wall of the shrink ring.

7. The sealing ring according to claim 1 or 2, characterized in that: An embedded ring is coaxially arranged at one end of the sealing ring facing the bearing; a frame is coaxially arranged inside the embedded ring; two clamping edges are arranged on the outer side of the embedded ring; the two clamping edges are respectively clamped with the inner wall and the outer wall of the frame.

8. The sealing ring according to claim 7, characterized in that: The thickness of the clamping edge clamped with the inner wall of the frame is greater than the thickness of the clamping edge clamped with the outer wall of the frame; the clamping edge clamped with the inner wall of the frame is provided with an inner convex ring extending in the direction of the bearing.

9. The sealing ring according to claim 8, characterized in that: Two compression rings are provided at one end of the skeleton facing the bearing; the two compression rings are coaxial with the skeleton; the two compression rings are respectively an inner compression ring positioned on the inner wall of the skeleton, and an outer compression ring positioned on the outer wall of the skeleton; the height of the outer compression ring along the axial direction of the skeleton is greater than the height of the inner compression ring along the axial direction of the skeleton.

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