Combined type driving shaft bearing sealing ring

Abstract

The utility model discloses a combined sealing ring for a driving shaft bearing. The combined sealing ring comprises a first ring body and a second ring body, a first folding edge is arranged on the outer wall of the first ring body; a second folding edge is arranged on the outer wall of the second ring body; spacing seams are arranged between the first folding edge and the second ring body as well as between the second folding edge and the first ring body; a rubber ring is arranged on the first ring body; the rubber ring is provided with an outwards-turned lip abutting against the second ring body. The rubber ring is provided with an inward turning lip abutting against the second folding edge. The first ring body, the second ring body and the rubber ring form a whole and are mounted on the bearing at one time, so that the processing efficiency of assembly is improved; control surfaces are additionally arranged on the first ring body and the second ring body, so that installation position judgment is facilitated; the inward turning lip and the outward turning lip block internal lubricating grease and external impurities, and the sealing effect is higher; and the inner ring and the outer ring of the bearing are simple to process, the precision is easy to control, and the assembly qualification rate is also improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing technical field, especially relate to a combined drive shaft bearing sealing ring. BACKGROUND

[0002] In the field of vehicles and motors, the driving shaft is in a high-speed rotating state for a long time, and the lubrication of the bearing plays an important role. Between the inner ring and the outer ring of the bearing is a mounting area for accommodating the ball. Two sealing rings are often installed between the inner ring and the outer ring to seal the ball. On the one hand, the sealing ring prevents the lubricating grease between the balls from leaking out, and on the other hand, the sealing ring prevents external impurities from entering between the inner ring and the outer ring, ensuring the purity of the lubricating grease, that is, maintaining good lubrication effect. However, in actual application, due to the existence of mechanical vibration, the sealing gap often changes, resulting in reduced sealing effect and easy entry of dust, affecting the normal rotation of the wheel.

[0003] The Chinese patent document with publication number CN208364599U discloses a drive shaft half shaft support bearing, which comprises an outer ring, an inner ring, a retainer and a plurality of steel balls. The outer surface of the outer ring is shaped as a circular arc surface. The curvature of the groove of the outer ring adopts a large curvature. The groove curvature coefficient is 0.58-0.62. The bearing adopts a double-layer sealing ring. The smaller bearing weight and volume can be self-centered through the outer spherical surface, greatly improving the deflection angle play of the bearing to meet the installation error of the drive shaft in the axial and angular directions, as well as the displacement caused by the movement of the engine and the deformation of the vehicle frame. The sealing effect is good.

[0004] In the above-mentioned patent solution, the sealing ring adopts a split structure, including two parts installed on the inner ring and the outer ring of the bearing respectively. The sealing contact lip between the two parts plays a sealing effect through abutment. However, the sealing ring needs to be installed in two steps, which affects the production efficiency, and the installation position is relatively narrow, making it difficult to judge and fine-tune whether the installation position is in place, that is, the installation precision control is difficult, and accidental errors are also common. By setting corresponding clamping grooves or judgment marks on the bearing, not only the machining precision control of the inner and outer rings of the bearing is difficult, but also the application range of the corresponding sealing ring is narrowed, which is not conducive to the wide application in this field. UTILITY MODEL CONTENTS

[0005] In order to overcome the prior art sealing ring to install two times, affect the production efficiency, and in order to guarantee the installation precision of sealing ring, also can cause the inner and outer ring machining precision control is more difficult technical problem. The utility model discloses a purpose lies in providing a combined drive shaft bearing sealing ring, through setting up two cross section shapes L type ring body, and through the elastic force of rubber ring makes three combination into a whole, installs on the bearing one time, promotes production efficiency, L type ring body also facilitates to its position judgement and fine adjustment, reduces the machining precision of bearing.

[0006] In order to realize above-mentioned purpose, the utility model discloses a combined drive shaft bearing sealing ring, including having the first ring body of setting in the inner side of bearing inner and outer ring gap and the second ring body of setting in the outer side of bearing inner and outer ring gap, first ring body outer wall is provided with the first flange of bending towards second ring body, second ring body outer wall is provided with the second flange of bending towards first ring body, first flange with second ring body between, second flange with first ring body between is provided with interval seam respectively, first ring body is provided with rubber ring on, wherein, rubber ring is provided with the everted lip of leaning towards first flange on, everted lip with second ring body is close, rubber ring is provided with the inverted lip of leaning towards bearing inner and outer ring gap inner side, inverted lip with second flange is close.

[0007] Everted lip and inverted lip respectively with the axial and radial contact of second ring body realizes sealing, is used for blocking external impurity and internal lubricating grease respectively, and the contact distance of external impurity and internal lubricating grease is farther, and the sealing effect is better.

[0008] Further, the rubber ring is located on the side of the first ring body towards the second ring body; the inner wall and the outer wall of the rubber ring are respectively provided with a U-shaped edge wrapping; the inner wall of the first ring body and the end of the first flange are respectively located in the adjacent U-shaped edge wrapping.

[0009] Specifically, the end of the first flange is provided with a shrink eave; the shrink eave is located in the adjacent U-shaped edge wrapping; the outer wall of the U-shaped edge wrapping close to the shrink eave is provided with an outer convex ring.

[0010] The outer convex ring increases the clamping strength with the bearing outer ring, and the fixing effect is better.

[0011] Specifically, the inner wall of the first ring body is provided with a press fold eave; the press fold eave is deformed towards the second ring body; the press fold eave is located in the adjacent U-shaped edge wrapping.

[0012] The press fold eave increases the structural strength and anti-deformation ability of the first ring body; the U-shaped edge wrapping increases the combination strength of the rubber ring and the first ring body, and prevents separation.

[0013] Preferably, the connection between the everted lip and the rubber ring, and the connection between the inverted lip and the rubber ring are respectively opposite to the inner wall of the first ring body.

[0014] Specifically, the end of the everted lip away from the side of the second ring body is provided with a first right-angled eave; the right-angled edge of the first right-angled eave close to the second ring body is parallel to the second ring body.

[0015] Specifically, the end of the inverted lip away from the side of the second folded edge is provided with a second right-angled eave; the right-angled edge of the second right-angled eave close to the second folded edge is parallel to the axial direction of the second ring body.

[0016] The elasticity of the everted lip makes the end of the everted lip close to the side of the second ring body abut against the second ring body, and as the grinding occurs, the right-angled edge of the first right-angled eave close to the second ring body also gradually abuts against the second ring body, thereby maintaining the original sealing performance. Similarly, the inverted lip is also the same.

[0017] Further, the length of the second folded edge is greater than the length of the first folded edge; and the thickness of the second ring body is less than the thickness of the first ring body.

[0018] Specifically, the end of the second folded edge is provided with a guide angle.

[0019] The slightly longer length of the second folded edge and the guide angle make the sealing ring more easily installed into the gap between the inner and outer rings of the bearing.

[0020] Specifically, the inner wall of the outer ring of the bearing is provided with steps at both ends, and the outer wall of the inner ring of the bearing is flat.

[0021] Compared with the prior art, the beneficial effects of the utility model lie in that the first ring body, the second ring body and the rubber ring form a whole, which is installed on the bearing at one time, thereby improving the machining efficiency of assembly; the first ring body and the second ring body in L-shaped cross section increase the operation control surface, thereby facilitating the installation position judgment and fine adjustment; the two inverted lips and everted lips on the rubber ring in opposite inclined directions are respectively used for blocking the leakage of internal lubricating grease and the invasion of external impurities, the contact distance of the lubricating grease and the external impurities is farther, and the sealing effect is higher; to some extent, the machining of the inner and outer rings of the bearing is simple, the precision is easy to control, and the qualified rate of assembly is also improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a sectional view structure schematic diagram of the utility model;

[0023] Figure 2 It is a sectional view structure schematic diagram of the utility model;

[0024] Figure 3 Figure is a structural diagram of a sealing ring in the prior art.

[0025] In the figure: 1, the first ring body; 11, the pressure fold eaves; 12, the first folded edge; 121, the shrinkage eaves; 2, the second ring body; 21, the second folded edge; 211, the guide angle; 3, the rubber ring; 31, the everted lip; 311, the first right-angle eaves; 32, the inverted lip; 321, the second right-angle eaves; 33, the U-shaped edge cover; 331, the outer convex ring; 4, the inner ring; 5, the outer ring; 6, the spacing seam; 71, the first sealing part; 72, the second sealing part. DETAILED DESCRIPTION

[0026] In the following, the utility model is further described in combination with the drawings and the specific implementation, and it needs to be explained that, under the premise of not conflicting, the following description between each embodiment or between each technical feature can be combined to form a new embodiment.

[0027] In the description of the utility model, it needs to be explained that, for the orientation words, if the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation and position relationship based on the orientation or position relationship shown in the drawings, only for the convenience of narrating the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, and cannot be understood as limiting the specific protection scope of the utility model.

[0028] In addition, if the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the "first", "second" features can be explicitly or implicitly included one or more features, and in the description of the utility model, the meaning of "several" is two or more than two, unless otherwise explicitly specified and limited.

[0029] In the utility model, except for another explicit provision and limitation, if the terms "set", "install" and the like are understood in a broad sense, for example, it can be fixedly connected, and can also be detachably connected, or integrally connected. It can be mechanically connected, and can be directly connected, or connected through an intermediate medium, and can be connected in the internal communication of two elements. For ordinary skilled persons in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific situation.

[0030] Reference Figure 3In the prior art, the split sealing ring is usually composed of two independent parts, i.e. the first sealing part 71 and the second sealing part 72. When installing the split sealing ring, the second sealing part 72 is usually installed first, and then the first sealing part 71 is installed. The assembly efficiency is low. In addition, after the second sealing part 72 is installed, the first sealing part 71 will block the second sealing part 72, so that the relative position of the two cannot be judged and adjusted. When the distance between the two is too far, the abutting force of the sealing lip is not enough, which will reduce the sealing effect of the sealing ring. When the distance between the two is too close, the wear of the sealing lip will exceed the expectation, which will shorten the service life of the sealing ring.

[0031] Referring to Figures 1-2 A combined drive shaft bearing sealing ring, comprising a first ring body 1 arranged inside the bearing inner and outer ring gap and a second ring body 2 arranged outside the bearing inner and outer ring gap; the outer wall of the first ring body 1 is provided with a first folded edge 12 bent by 90 degrees towards the second ring body 2; the outer wall of the second ring body 2 is provided with a second folded edge 21 bent by 90 degrees towards the first ring body 1; a spacing gap 6 is arranged between the first folded edge 12 and the second ring body 2 and between the second folded edge 21 and the first ring body 1 respectively.

[0032] The side of the first ring body 1 facing the second ring body 2 is provided with a rubber ring 3; the rubber ring 3 is provided with an everted lip 31 inclined towards the first folded edge 12, which abuts against the second ring body 2; the rubber ring 3 is provided with an inverted lip 32 inclined towards the inside of the bearing inner and outer ring gap, which abuts against the second folded edge 21; the connection between the everted lip 31 and the rubber ring 3 and the connection between the inverted lip 32 and the rubber ring 3 are respectively opposite to the inner wall of the first ring body 1.

[0033] The end of the outer wall of the first folded edge 12 is provided with a shrink eave 121; the inner wall of the first ring body 1 is provided with a pressure fold eave 11; the pressure fold eave 11 is deformed towards the second ring body 2; the inner wall and the outer wall of the rubber ring 3 are respectively provided with a U-shaped edge 33; the shrink eave 121 and the pressure fold eave 11 are respectively located in the adjacent U-shaped edge 33; the outer wall of the U-shaped edge 33 close to the shrink eave 121 is provided with an outer convex ring 331.

[0034] The end of the everted lip 31 away from the second ring body 2 is provided with a first right-angle eave 311; the right-angle edge of the first right-angle eave 311 close to the second ring body 2 is parallel to the second ring body 2; the end of the inverted lip 32 away from the second folded edge 21 is provided with a second right-angle eave 321; the right-angle edge of the second right-angle eave 321 close to the second folded edge 21 is parallel to the axial direction of the second ring body 2.

[0035] The length of the second folded edge 21 is greater than the length of the first folded edge 12; the thickness of the second ring body 2 is less than the thickness of the first ring body 1; and the end outer wall of the second folded edge 21 is provided with a guide angle 211.

[0036] The inner wall of the bearing outer ring 5 is provided with a step at both ends, and the outer wall of the bearing inner ring 4 is flat.

[0037] The above merely describes specific embodiments of the present application, but the technical features of the present application are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present application, which are all covered by the patent range of the present application.

Claims

1. A combined drive shaft bearing seal ring characterized by: The application relates to a bearing gap sealing structure, which comprises a first ring body arranged in the inner side of the bearing inner and outer ring gap and a second ring body arranged in the outer side of the bearing inner and outer ring gap; the outer wall of the first ring body is provided with a first folding edge which is bent towards the second ring body; the outer wall of the second ring body is provided with a second folding edge which is bent towards the first ring body; a spacing gap is arranged between the first folding edge and the second ring body and between the second folding edge and the first ring body; a rubber ring is arranged on the first ring body; an outward turning lip which is inclined towards the first folding edge is arranged on the rubber ring, and the outward turning lip is in abutment with the second ring body; an inward turning lip which is inclined towards the inner side of the bearing inner and outer ring gap is arranged on the rubber ring, and the inward turning lip is in abutment with the second folding edge.

2. The seal ring of claim 1, wherein: The rubber ring is located on the side of the first ring body which faces the second ring body; the inner wall and the outer wall of the rubber ring are respectively provided with U-shaped edge covering; the inner wall of the first ring body and the end of the first folding edge are respectively located in the adjacent U-shaped edge covering.

3. The seal ring of claim 2, wherein: The end of the first folding edge is provided with a shrinked eave; the shrinked eave is located in the adjacent U-shaped edge covering; the outer wall of the U-shaped edge covering close to the shrinked eave is provided with an outward convex ring.

4. The seal ring of claim 2, wherein: The inner wall of the first ring body is provided with a pressed eave; the pressed eave is deformed towards the second ring body; the pressed eave is located in the adjacent U-shaped edge covering.

5. The seal ring of any one of claims 1-4, wherein: The connection between the outward turning lip and the rubber ring and the connection between the inward turning lip and the rubber ring are respectively opposite to the inner wall of the first ring body.

6. The seal ring of any one of claims 1-4, wherein: The end of the outward turning lip is provided with a first right-angle eave which is away from the side of the second ring body; the right-angle side of the first right-angle eave close to the second ring body is parallel to the second ring body.

7. The seal ring of any one of claims 1-4, wherein: The end of the inward turning lip is provided with a second right-angle eave which is away from the side of the second folding edge; the right-angle side of the second right-angle eave close to the second folding edge is parallel to the axial direction of the second ring body.

8. The seal ring of any one of claims 1-4, wherein: The length of the second folding edge is greater than the length of the first folding edge; the thickness of the second ring body is smaller than the thickness of the first ring body.

9. The seal ring of claim 8, wherein: The end of the second folding edge is provided with a guide angle.

10. The seal ring of any one of claims 1-4, wherein: The inner wall of the bearing outer ring is provided with steps at both ends, and the outer wall of the bearing inner ring is flat.

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