A bearing with waterproof sealing function

Abstract

The present invention relates to the technical field of bearing sealing, and in particular to a bearing with a waterproof sealing function, comprising an outer ring, an inner ring and a roller, wherein the inner ring and the outer ring are coaxially arranged, and the roller is arranged between the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring. The bearing also comprises a first sealing cover, a second sealing cover, a first sealing ring, a second sealing ring and a rotating guide, wherein the first sealing cover and the second sealing cover are respectively coaxially slidably arranged on both sides of the inner ring, the first sealing ring is coaxially arranged on the first sealing cover and the outer ring and on the opposite ends of the second sealing cover and the outer ring, the second sealing ring is coaxially arranged on the second sealing cover and the inner ring and on the opposite ends of the second sealing cover and the inner ring, and the rotating guide is arranged between the first sealing cover and the second sealing cover. The present invention can guide the first sealing cover and the second sealing cover to move relative to each other through the rotating guide, thereby squeezing the first sealing ring and the second sealing ring, thereby effectively preventing external pollution from eroding the ball and the retaining frame.

Description

Technical Field

[0001] The invention relates to the technical field of bearing sealing, and in particular to a bearing with a waterproof sealing function. Background Art

[0002] Deep groove ball bearings are a type of rolling bearing commonly used at present. They are basically composed of an inner ring, an outer ring, a group of steel balls and a cage. The deep groove ball structure also includes sealed deep groove balls, which are mainly made of a dust-proof sealing cover stamped from steel plate material to form a simple sealing effect between the inner and outer rings. However, they only play a simple role in preventing dust from entering the bearing raceway. The waterproof effect is poor and the lubricating grease is easily exposed. Once water enters the bearing during work, the grease lubrication will be reduced, the bearing wear will increase, and ultimately the bearing life will be greatly reduced or even damaged, thereby causing production accidents. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] The present invention is aimed at the above-mentioned defects existing in the prior art, and specially proposes a bearing with waterproof sealing function. Through the first sealing cover, the second sealing cover, the first sealing ring, the second sealing ring and the rotating guide, the sealing performance of the bearing during rotation can be effectively improved, thereby solving the problem that accidents easily caused by water entering the bearing.

[0005] 2. Technical Solution

[0006] To solve the above technical problems, the present invention provides a bearing with a waterproof sealing function, comprising an outer ring, an inner ring and a roller, wherein the inner ring and the outer ring are coaxially arranged, and the roller is arranged between the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring. The bearing also comprises a first sealing cover, a second sealing cover, a first sealing ring, a second sealing ring and a rotating guide, wherein the first sealing cover and the second sealing cover are respectively coaxially slidably arranged on both sides of the inner ring, the first sealing ring is coaxially arranged on the first sealing cover and the outer ring and on the opposite ends of the second sealing cover and the outer ring, the second sealing ring is coaxially arranged on the second sealing cover and the inner ring and on the opposite ends of the second sealing cover and the inner ring, and the rotating guide is arranged between the first sealing cover and the second sealing cover, and when the inner ring and the outer ring rotate relative to each other, the rotating guide guides the first sealing cover and the second sealing cover to move relative to each other along the axial direction of the inner ring.

[0007] Preferably, a first seating groove extending along its radial direction is provided on the inner circumferential surface of the inner ring, and a first sliding groove and a second sliding groove extending along its axial direction are respectively provided at both ends of the inner ring, and the first sliding groove and the second sliding groove are both connected to the first seating groove, and the rotating guide member includes a first centrifugal block, a first guide rod and a second guide rod, the first centrifugal block is slidably arranged in the first seating groove along the radial direction of the inner ring, and a first push surface inclined toward the first sealing cover and a second push surface inclined toward the second sealing cover are provided on the side of the first centrifugal block away from the axis of the inner ring; the first guide rod is slidably arranged in the first sliding groove along the axial direction of the inner ring, the inner end of the first guide rod has a first inclined block slidably matched with the second push surface, and the outer end of the first guide rod is fixedly connected to the first sealing cover; the second guide rod is slidably arranged in the second sliding groove along the axial direction of the inner ring, the inner end of the second guide rod has a second inclined block slidably matched with the first push surface, and the outer end of the second guide rod is fixedly connected to the second sealing cover.

[0008] Preferably, both ends of the outer ring are provided with a first limiting groove coaxial therewith, the first sealing ring has a first positive ring body coaxially fitted with the first limiting groove, and a first conical ring body coaxially arranged on the outside of the first positive ring body, the first conical ring bodies at both ends of the outer ring are respectively abutted against the inner sides of the first sealing cover and the second sealing cover, and the clamping openings of the first positive ring body and the first conical ring body are away from the axis center of the outer ring.

[0009] Preferably, both ends of the inner ring are provided with a second limiting groove coaxial therewith, the second sealing ring has a second positive ring body coaxially fitted with the second limiting groove, and a second conical ring body coaxially arranged on the outside of the second positive ring body, the second conical ring bodies at both ends of the inner ring are respectively abutted against the inner sides of the first sealing cover and the second sealing cover, and the clamping openings of the second positive ring body and the second conical ring body are facing the axis center of the inner ring.

[0010] Preferably, the first sealing cover and the second sealing cover have the same and corresponding structures, the first sealing cover and the second sealing cover are both provided with a first annular surface and a second annular surface on their inner sides, the first conical ring body is coaxially abutted on the first annular surface, and the second conical ring body is coaxially abutted on the second annular surface.

[0011] Preferably, the outer rings of the first sealing cover and the second sealing cover are both provided with a first limiting ring located outside the first conical ring body, and the first limiting ring is coaxially rotatably matched with the first conical ring body.

[0012] Preferably, a second receiving groove extending along the radial direction is provided on the outer circumferential surface of the outer ring, and a third sliding groove and a fourth sliding groove extending along the axial direction are respectively provided at both ends of the outer ring, and the third sliding groove and the fourth sliding groove are both connected to the second receiving groove, and the rotating guide member comprises a second centrifugal block, a third guide rod and a fourth guide rod, the second centrifugal block is slidably arranged in the second receiving groove along the radial direction of the outer ring, and a third push surface inclined toward the first sealing cover and a fourth push surface inclined toward the second sealing cover are provided on the side of the second centrifugal block away from the axis of the outer ring; the third guide rod is slidably arranged in the third sliding groove along the axial direction of the outer ring, the inner end of the third guide rod has a third inclined block slidably matched with the fourth push surface, and the outer end of the third guide rod is fixedly connected to the first sealing cover; the fourth guide rod is slidably arranged in the fourth sliding groove along the axial direction of the outer ring, the inner end of the fourth guide rod has a fourth inclined block slidably matched with the third push surface, and the outer end of the fourth guide rod is fixedly connected to the second sealing cover.

[0013] Preferably, both ends of the outer ring are provided with a third limiting groove coaxial therewith, the first sealing ring has a third positive ring body coaxially fitted with the third limiting groove, and a third conical ring body coaxially arranged on the outside of the third positive ring body, the third conical ring bodies at both ends of the outer ring are respectively abutted against the inner sides of the first sealing cover and the second sealing cover, and the clamping openings of the third positive ring body and the third conical ring body are away from the axis center of the outer ring.

[0014] Preferably, both ends of the inner ring are provided with a fourth limiting groove coaxial therewith, the second sealing ring has a fourth positive ring body coaxially fitted with the fourth limiting groove, and a fourth conical ring body coaxially arranged on the outside of the fourth positive ring body, the fourth conical ring bodies at both ends of the inner ring are respectively abutted against the inner sides of the first sealing cover and the second sealing cover, and the clamping openings of the fourth positive ring body and the fourth conical ring body are facing the axis center of the inner ring.

[0015] Preferably, the first sealing cover and the second sealing cover have the same and corresponding structures, and the inner sides of the first sealing cover and the second sealing cover are both provided with a third annular surface and a fourth annular surface, the third conical ring body coaxially abuts against the third annular surface, and the fourth conical ring body coaxially abuts against the fourth annular surface.

[0016] 3. Beneficial Effects

[0017] Compared with the prior art, the present invention can guide the first sealing cover and the second sealing cover to move relative to each other through the rotating guide, thereby squeezing the first sealing ring and the second sealing ring, thereby effectively preventing external pollution from corroding the ball and the retaining frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1is a three-dimensional diagram of a first embodiment of a bearing having a waterproof sealing function;

[0019] Figure 2 is a three-dimensional cross-sectional view of a first embodiment of a bearing having a waterproof sealing function;

[0020] Figure 3 is a cross-sectional view of a first embodiment of a bearing having a waterproof sealing function;

[0021] Figure 4 yes Figure 3 A local enlarged view of point A;

[0022] Figure 5 is a three-dimensional diagram of a first sealing disk and a second sealing disk in a first embodiment of a bearing having a waterproof sealing function;

[0023] Figure 6 yes Figure 5 A partial enlarged view of point B;

[0024] Figure 7 is a three-dimensional exploded view of a first embodiment of a bearing having a waterproof sealing function;

[0025] Figure 8 is a cross-sectional view of a second embodiment of a bearing having a waterproof sealing function;

[0026] Fig. 9 yes Figure 8 A partial enlarged view of point C;

[0027] Fig.10 is a three-dimensional diagram of a first sealing disk and a second sealing disk in a second embodiment of a bearing having a waterproof sealing function;

[0028] Fig.11 yes Fig.10 A partial enlarged view of point D;

[0029] Fig.12 The present invention is a three-dimensional exploded view of a second embodiment of a bearing having a waterproof sealing function.

[0030] In the figure:

[0031] 1 is the outer ring; 2 is the inner ring; 3 is the roller; 4 is the cage;

[0032] 5 is a first sealing cover; 51 is a first limiting ring; 52 is a second limiting ring;

[0033] 6 is a second sealing cover;

[0034] 7 is the first sealing ring; 71 is the first positive ring body; 72 is the first conical ring body; 73 is the third positive ring body; 74 is the third conical ring body;

[0035] 8 is the second sealing ring; 81 is the second positive ring body; 82 is the second conical ring body; 83 is the fourth positive ring body; 84 is the fourth conical ring body;

[0036] 9 is a rotating guide; 91 is a first centrifugal block; 911 is a first push surface; 912 is a second push surface; 92 is a first guide rod; 921 is a first inclined block; 93 is a second guide rod; 931 is a second inclined block; 94 is a second centrifugal block; 941 is a third push surface; 942 is a fourth push surface; 95 is a third guide rod; 951 is a third inclined block; 96 is a fourth guide rod; 961 is a fourth inclined block. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] Embodiment 1:

[0039] like Figure 1 and Figure 2 As shown, the bearing with waterproof sealing function of this embodiment comprises an outer ring 1, an inner ring 2 and a roller 3, wherein the inner ring 2 and the outer ring 1 are coaxially arranged, and the roller 3 is arranged between the outer circumferential surface of the inner ring 2 and the inner circumferential surface of the outer ring 1, and further comprises a first sealing cover 5, a second sealing cover 6, a first sealing ring 7, a second sealing ring 8 and a rotating guide 9, wherein the first sealing cover 5 and the second sealing cover 6 are respectively coaxially slidably arranged on both sides of the inner ring 2, the first sealing ring 7 is coaxially arranged on the first sealing cover 5 and the outer ring 1 and on the opposite ends of the second sealing cover 6 and the outer ring 1, the second sealing ring 8 is coaxially arranged on the second sealing cover 6 and the inner ring 2 and on the opposite ends of the second sealing cover 6 and the inner ring 2, and the rotating guide 9 is arranged between the first sealing cover 5 and the second sealing cover 6, and when the inner ring 2 and the outer ring 1 rotate relative to each other, the rotating guide 9 guides the first sealing cover 5 and the second sealing cover 6 to move relative to each other along the axial direction of the inner ring 2.

[0040] The bearing further includes a cage 4 disposed between the outer circumferential surface of the inner ring 2 and the inner circumferential surface of the outer ring 1 , and the rollers 3 are disposed in the cage 4 .

[0041] When in use, the inner ring 2 and the outer ring 1 rotate relative to each other, so that the rotating guide 9 can guide the first sealing cover 5 and the second sealing cover 6 to move relative to each other along the axis of the inner ring 2, so that the distance between the first sealing cover 5 and the inner ring 2 and the outer ring 1 is reduced, and the distance between the second sealing cover 6 and the inner ring 2 and the outer ring 1 is also reduced, so that the first sealing ring 7 and the second sealing ring 8 are both compressed, thereby effectively improving the sealing between the outer circumferential surface of the inner ring 2 and the inner circumferential surface of the outer ring 1, thereby preventing external pollution from corroding the balls and the retaining frame 4.

[0042] In this embodiment, the first sealing cover 5 and the second sealing cover 6 can be guided to move relative to each other by the rotating guide 9, thereby squeezing the first sealing ring 7 and the second sealing ring 8, so as to effectively prevent the external contamination from corroding the ball and the retaining frame 4.

[0043] like Figure 3 , Figure 5 and Figure 6 As shown, a first placement groove extending in the radial direction is provided on the inner circumferential surface of the inner ring 2, and a first sliding groove and a second sliding groove extending in the axial direction are respectively provided at both ends of the inner ring 2, and the first sliding groove and the second sliding groove are both connected to the first placement groove, and the rotating guide 9 includes a first centrifugal block 91, a first guide rod 92 and a second guide rod 93, the first centrifugal block 91 is slidably arranged in the first placement groove along the radial direction of the inner ring 2, and a first push surface 911 inclined toward the first sealing cover 5 and a first push surface 912 inclined toward the second sealing cover 5 are provided on the side of the first centrifugal block 91 away from the axis of the inner ring 2. The second push surface 912 of the sealing cover 6; the first guide rod 92 is slidably arranged in the first sliding groove along the axial direction of the inner ring 2, the inner end of the first guide rod 92 has a first inclined block 921 that slides with the second push surface 912, and the outer end of the first guide rod 92 is fixedly connected to the first sealing cover 5; the second guide rod 93 is slidably arranged in the second sliding groove along the axial direction of the inner ring 2, the inner end of the second guide rod 93 has a second inclined block 931 that slides with the first push surface 911, and the outer end of the second guide rod 93 is fixedly connected to the second sealing cover 6.

[0044] As a first embodiment of the present application, when the outer ring 1 is fixed and the inner ring 2 rotates, the first centrifugal block 91 moves away from the axis of the inner ring 2 in the first mounting groove along the radial direction of the inner ring 2 under the action of centrifugal force. Because the first inclined block 921 slides with the second push surface 912 of the first centrifugal block 91, and the second inclined block 931 slides with the first push surface 911 of the first centrifugal block 91, the first inclined block 921 and the second inclined block 931 move away from each other, thereby causing the first guide rod 92 and the second guide rod 93 to move relative to each other, so that the first sealing disk connected to the first guide rod 92 and the second sealing disk connected to the second guide rod 93 move relative to each other, so that when the inner ring 2 rotates relative to the outer ring 1, the first sealing disk and the second sealing disk can be relatively close to each other to squeeze the first sealing ring 7 and the second sealing ring 8, thereby improving the sealing of the bearing.

[0045] like Figure 4 As shown, both ends of the outer ring 1 are provided with a first limiting groove coaxial therewith, the first sealing ring 7 has a first positive ring body 71 coaxially fitted with the first limiting groove, and a first conical ring body 72 coaxially arranged on the outside of the first positive ring body 71, the first conical ring bodies 72 at both ends of the outer ring 1 are respectively abutted against the inner sides of the first sealing cover 5 and the second sealing cover 6, and the clamping openings of the first positive ring body 71 and the first conical ring body 72 are away from the axis of the outer ring 1.

[0046] By setting the first positive ring body 71 in the first limiting grooves at both ends of the outer ring 1, the first positive ring body 71 is not easy to slide at the two ends of the outer ring 1. At the same time, because the first conical ring body 72 is set at the outer end of the first positive ring body 71, when the first sealing disk and the second sealing disk move relative to each other, the first conical ring body 72 bends to get closer to the first positive ring body 71. During this process, the friction between the first conical ring body 72 and the first sealing disk and the second sealing disk is slightly increased, so that the first sealing disk and the second sealing disk can rotate normally at the two ends of the outer ring 1 without losing a large amount of kinetic energy due to friction.

[0047] Because the clamping opening of the first positive ring body 71 and the first conical ring body 72 is away from the axis of the outer ring 1, external pollution is mostly gathered at the clamping opening of the first positive ring body 71 and the first conical ring body 72, further improving the sealing performance of the bearing.

[0048] like Figure 4 As shown, both ends of the inner ring 2 are provided with second limiting grooves coaxial therewith, the second sealing ring 8 has a second positive ring body 81 coaxially fitted with the second limiting groove, and a second conical ring body 82 coaxially arranged on the outside of the second positive ring body 81, the second conical ring bodies 82 at both ends of the inner ring 2 are respectively abutted against the inner sides of the first sealing cover 5 and the second sealing cover 6, and the clamping openings of the second positive ring body 81 and the second conical ring body 82 are toward the axis center of the inner ring 2.

[0049] By setting the second positive ring body 81 in the second limiting grooves at both ends of the inner ring 2, the second positive ring body 81 is not easy to slide at the two ends of the inner ring 2. At the same time, because the second conical ring body 82 is set at the outer end of the second positive ring body 81, when the first sealing plate and the second sealing plate move relative to each other, the second conical ring body 82 bends to approach the second positive ring body 81. During this process, the friction force between the second conical ring body 82 and the first sealing plate and the second sealing plate is slightly increased, so that the first sealing plate and the second sealing plate can be sealed and connected to the two ends of the inner ring 2.

[0050] Since the clamping openings of the second positive ring body 81 and the second conical ring body 82 face the axis of the inner ring 2, more external pollution is gathered at the clamping openings, further improving the sealing performance of the bearing.

[0051] like Figure 4 As shown, the first sealing cover 5 and the second sealing cover 6 have the same and corresponding structures, and the inner sides of the first sealing cover 5 and the second sealing cover 6 are both provided with a first annular surface and a second annular surface, the first conical ring body 72 is coaxially abutted on the first annular surface, and the second conical ring body 82 is coaxially abutted on the second annular surface.

[0052] By arranging the first annular surface and the second annular surface on the inner side of the first sealing cover 5 and the second sealing cover 6, the first conical ring body 72 can abut against the first annular surface, thereby making the first conical ring body 72 and the first sealing cover 5 and the second sealing cover 6 have surface contact, thereby improving the sealing performance of the bearing, and when the first sealing cover 5 and the second sealing cover 6 move relatively, the first conical ring body 72 is deformed to make line contact with the bending part of the first annular surface, thereby reducing the friction between the first conical ring body 72 and the first annular surface, so that the first sealing cover 5 and the second sealing cover 6 can stably rotate at both ends of the outer ring 1 without easily losing kinetic energy; similarly, by making the second conical ring body 82 have surface contact with the second annular surface, the sealing performance of the bearing can be further improved.

[0053] like Figure 4 As shown, the outer rings 1 of the first sealing cover 5 and the second sealing cover 6 are both provided with a first limiting ring 51 located outside the first conical ring body 72 , and the first limiting ring 51 is coaxially rotatably matched with the first conical ring body 72 .

[0054] By setting the first limiting ring 51 on the outer ring 1 of the first sealing cover 5 and the second sealing cover 6, the first conical ring body 72 can be located between the first limiting ring 51 and the first ring surface, and there is a certain gap between the first conical ring body 72 and the first limiting ring 51, so that the first conical ring body 72 and the first limiting ring 51 can rotate stably, thereby further improving the sealing performance of the bearing.

[0055] like Figure 8 , Fig.10 , Fig.11 and Fig.12 As shown, the outer circumferential surface of the outer ring 1 is provided with a second placement groove extending in the radial direction thereof, and the two ends of the outer ring 1 are respectively provided with a third sliding groove and a fourth sliding groove extending in the axial direction thereof, and the third sliding groove and the fourth sliding groove are both connected to the second placement groove, and the rotating guide 9 includes a second centrifugal block 94, a third guide rod 95 and a fourth guide rod 96, and the second centrifugal block 94 is slidably arranged in the second placement groove along the radial direction of the outer ring 1, and the second centrifugal block 94 is provided with a third push surface 941 inclined toward the first sealing cover 5 and a third push surface 941 inclined toward the second sealing cover 5 on the side away from the axis of the outer ring 1. The fourth push surface 942 of the sealing cover 6; the third guide rod 95 is arranged in the third sliding groove for axial sliding along the outer ring 1, the inner end of the third guide rod 95 has a third inclined block 951 that slides with the fourth push surface 942, and the outer end of the third guide rod 95 is fixedly connected to the first sealing cover 5; the fourth guide rod 96 is arranged in the fourth sliding groove for axial sliding along the outer ring 1, the inner end of the fourth guide rod 96 has a fourth inclined block 961 that slides with the third push surface 941, and the outer end of the fourth guide rod 96 is fixedly connected to the second sealing cover 6.

[0056] Embodiment 2:

[0057] Compared with Example 1, in this embodiment, when the inner ring 2 is fixed and the outer ring 1 rotates, the second centrifugal block 94 moves away from the axis of the inner ring 2 in the second mounting groove along the radial direction of the inner ring 2 under the action of centrifugal force. Because the third inclined block 951 slides with the fourth push surface 942 of the second centrifugal block 94, and the fourth inclined block 961 slides with the third push surface 941 of the second centrifugal block 94, the third inclined block 951 and the fourth inclined block 961 move away from each other, thereby causing the third guide rod 95 and the fourth guide rod 96 to move relative to each other, so that the first sealing disk connected to the third guide rod 95 and the second sealing disk connected to the fourth guide rod 96 move relative to each other, so that when the outer ring 1 rotates relative to the inner ring 2, the first sealing disk and the second sealing disk can be relatively close to each other to squeeze the first sealing ring 7 and the second sealing ring 8, thereby improving the sealing of the bearing.

[0058] like Fig. 9 As shown, both ends of the outer ring 1 are provided with a third limiting groove coaxial therewith, the first sealing ring 7 has a third positive ring body 73 coaxially fitted with the third limiting groove, and a third conical ring body 74 coaxially arranged on the outside of the third positive ring body 73, the third conical ring bodies 74 at both ends of the outer ring 1 are respectively abutted against the inner sides of the first sealing cover 5 and the second sealing cover 6, and the clamping openings of the third positive ring body 73 and the third conical ring body 74 are away from the axis of the outer ring 1.

[0059] By setting the third positive ring body 73 in the third limiting grooves at both ends of the outer ring 1, the third positive ring body 73 is not easy to slide at the two ends of the outer ring 1. At the same time, because the third conical ring body 74 is set at the outer end of the third positive ring body 73, when the first sealing disk and the second sealing disk move relative to each other, the third conical ring body 74 bends to get closer to the third positive ring body 73. During this process, the friction force between the third conical ring body 74 and the first sealing disk and the second sealing disk is slightly increased, so that the first sealing disk and the second sealing disk can be sealed and connected to the two ends of the outer ring 1.

[0060] Since the clamping openings of the third positive ring body 73 and the third conical ring body 74 face the axis of the inner ring 2, external pollution is mostly gathered at the clamping openings, further improving the sealing performance of the bearing.

[0061] like Fig. 9 As shown, both ends of the inner ring 2 are provided with a fourth limiting groove coaxial therewith, the second sealing ring 8 has a fourth positive ring body 83 coaxially fitted with the fourth limiting groove, and a fourth conical ring body 84 coaxially arranged on the outside of the fourth positive ring body 83, the fourth conical ring bodies 84 at both ends of the inner ring 2 are respectively abutted against the inner sides of the first sealing cover 5 and the second sealing cover 6, and the clamping openings of the fourth positive ring body 83 and the fourth conical ring body 84 are toward the axis center of the inner ring 2.

[0062] By setting the fourth positive ring body 83 in the fourth limiting grooves at the two ends of the inner ring 2, the fourth positive ring body 83 is not easy to slide at the two ends of the inner ring 2. At the same time, because the fourth conical ring body 84 is set at the outer end of the fourth positive ring body 83, when the first sealing disk and the second sealing disk move relative to each other, the fourth conical ring body 84 bends to get closer to the fourth positive ring body 83. During this process, the friction between the fourth conical ring body 84 and the first sealing disk and the second sealing disk is slightly increased, so that the first sealing disk and the second sealing disk can rotate normally at the two ends of the inner ring 2 without losing a large amount of kinetic energy due to friction.

[0063] Because the clamping openings of the fourth positive ring body 83 and the fourth conical ring body 84 face the axis of the inner ring 2, external pollution is mostly gathered at the clamping openings of the fourth positive ring body 83 and the fourth conical ring body 84, further improving the sealing performance of the bearing.

[0064] like Fig. 9 As shown, the first sealing cover 5 and the second sealing cover 6 have the same and corresponding structures, and the inner sides of the first sealing cover 5 and the second sealing cover 6 are both provided with a third annular surface and a fourth annular surface, the third conical ring body 74 is coaxially abutted on the third annular surface, and the fourth conical ring body 84 is coaxially abutted on the fourth annular surface.

[0065] The sealing performance of the bearing is further improved by abutting the third cone ring body 74 against the third ring surface to form a surface contact, and abutting the fourth cone ring body 84 against the fourth ring surface to form a surface contact.

[0066] The outer rings 1 of the first sealing cover 5 and the second sealing cover 6 are both provided with a second limiting ring 52 located outside the third conical ring body 74 , and the second limiting ring 52 is coaxially rotatably matched with the third conical ring body 74 .

[0067] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A bearing having a waterproof sealing function, comprising an outer ring (1), an inner ring (2) and a roller (3), wherein the inner ring (2) and the outer ring (1) are coaxially arranged, and the roller (3) is arranged between the outer circumferential surface of the inner ring (2) and the inner circumferential surface of the outer ring (1), characterized in that: The bearing having a waterproof sealing function further comprises a first sealing cover (5), a second sealing cover (6), a first sealing ring (7), a second sealing ring (8) and a rotating guide (9); The first sealing cover (5) and the second sealing cover (6) are respectively coaxially slidably arranged on both sides of the inner ring (2); the first sealing ring (7) is coaxially arranged between the first sealing cover (5) and the outer ring (1) and the opposite ends of the second sealing cover (6) and the outer ring (1); the second sealing ring (8) is coaxially arranged between the second sealing cover (6) and the inner ring (2) and the opposite ends of the second sealing cover (6) and the inner ring (2); the rotation guide (9) is arranged between the first sealing cover (5) and the second sealing cover (6); when the inner ring (2) and the outer ring (1) rotate relative to each other, the rotation guide (9) guides the first sealing cover (5) and the second sealing cover (6) to move relative to each other along the axial direction of the inner ring (2); The inner circumferential surface of the inner ring (2) is provided with a first seating groove extending in the radial direction thereof, and the two ends of the inner ring (2) are respectively provided with a first sliding groove and a second sliding groove extending in the axial direction thereof, and the first sliding groove and the second sliding groove are both connected to the first seating groove. The rotating guide (9) comprises a first centrifugal block (91), a first guide rod (92) and a second guide rod (93), and the first centrifugal block (91) can be slidably arranged in the first seating groove in the radial direction of the inner ring (2). The first centrifugal block (91) is provided with a first push surface (911) inclined toward the first sealing cover (5) and a second push surface (912) inclined toward the second sealing cover (6) on a side away from the axis of the inner ring (2). The first guide rod (92) is slidably arranged in the first sliding groove along the axial direction of the inner ring (2), the inner end of the first guide rod (92) has a first inclined block (921) slidably matched with the second push surface (912), and the outer end of the first guide rod (92) is fixedly connected to the first sealing cover (5); the second guide rod (93) is slidably arranged in the second sliding groove along the axial direction of the inner ring (2), the inner end of the second guide rod (93) has a second inclined block (931) slidably matched with the first push surface (911), and the outer end of the second guide rod (93) is fixedly connected to the second sealing cover (6).

2. A bearing with waterproof sealing function according to claim 1, characterized in that: Both ends of the outer ring (1) are provided with a first limiting groove coaxial therewith, the first sealing ring (7) has a first positive ring body (71) coaxially fitted with the first limiting groove, and a first conical ring body (72) coaxially arranged outside the first positive ring body (71), the first conical ring bodies (72) at both ends of the outer ring (1) are respectively abutted against the inner sides of the first sealing cover (5) and the second sealing cover (6), and the clamping openings of the first positive ring body (71) and the first conical ring body (72) are away from the axis of the outer ring (1).

3. A bearing with waterproof sealing function according to claim 2, characterized in that: Both ends of the inner ring (2) are provided with second limiting grooves coaxial therewith, the second sealing ring (8) has a second positive ring body (81) coaxially fitted with the second limiting groove, and a second conical ring body (82) coaxially arranged outside the second positive ring body (81), the second conical ring bodies (82) at both ends of the inner ring (2) are respectively abutted against the inner sides of the first sealing cover (5) and the second sealing cover (6), and the clamping openings of the second positive ring body (81) and the second conical ring body (82) face the axis of the inner ring (2).

4. A bearing with waterproof sealing function according to claim 3, characterized in that: The first sealing cover (5) and the second sealing cover (6) have the same structure and correspond to each other. The first sealing cover (5) and the second sealing cover (6) are both provided with a first annular surface and a second annular surface on their inner sides. The first conical ring body (72) is coaxially abutted against the first annular surface, and the second conical ring body (82) is coaxially abutted against the second annular surface.

5. A bearing with waterproof sealing function according to claim 4, characterized in that: The outer rings (1) of the first sealing cover (5) and the second sealing cover (6) are both provided with a first limiting ring (51) located outside the first conical ring body (72), and the first limiting ring (51) and the first conical ring body (72) are coaxially rotatably matched.

6. A bearing with a waterproof sealing function, comprising an outer ring (1), an inner ring (2) and a roller (3), wherein the inner ring (2) and the outer ring (1) are coaxially arranged, and the roller (3) is arranged between the outer circumferential surface of the inner ring (2) and the inner circumferential surface of the outer ring (1), characterized in that: The bearing having a waterproof sealing function further comprises a first sealing cover (5), a second sealing cover (6), a first sealing ring (7), a second sealing ring (8) and a rotating guide (9); The first sealing cover (5) and the second sealing cover (6) are respectively coaxially slidably arranged on both sides of the inner ring (2); the first sealing ring (7) is coaxially arranged between the first sealing cover (5) and the outer ring (1) and the opposite ends of the second sealing cover (6) and the outer ring (1); the second sealing ring (8) is coaxially arranged between the second sealing cover (6) and the inner ring (2) and the opposite ends of the second sealing cover (6) and the inner ring (2); the rotation guide (9) is arranged between the first sealing cover (5) and the second sealing cover (6); when the inner ring (2) and the outer ring (1) rotate relative to each other, the rotation guide (9) guides the first sealing cover (5) and the second sealing cover (6) to move relative to each other along the axial direction of the inner ring (2); The outer circumferential surface of the outer ring (1) is provided with a second seating groove extending in the radial direction thereof, and the two ends of the outer ring (1) are respectively provided with a third sliding groove and a fourth sliding groove extending in the axial direction thereof, and the third sliding groove and the fourth sliding groove are both connected to the second seating groove. The rotating guide (9) comprises a second centrifugal block (94), a third guide rod (95) and a fourth guide rod (96), the second centrifugal block (94) is slidably arranged in the second seating groove in the radial direction of the outer ring (1), and the second centrifugal block (94) is provided with a third push surface (941) inclined toward the first sealing cover (5) and a third push surface (942) inclined toward the second sealing cover (6) on a side of the second centrifugal block (94) away from the axis of the outer ring (1). The outer ring (1) has a fourth push surface (942); the third guide rod (95) is slidably arranged in the third sliding groove along the axial direction of the outer ring (1); the inner end of the third guide rod (95) has a third inclined block (951) slidably matched with the fourth push surface (942); the outer end of the third guide rod (95) is fixedly connected to the first sealing cover (5); the fourth guide rod (96) is slidably arranged in the fourth sliding groove along the axial direction of the outer ring (1); the inner end of the fourth guide rod (96) has a fourth inclined block (961) slidably matched with the third push surface (941); the outer end of the fourth guide rod (96) is fixedly connected to the second sealing cover (6).

7. A bearing with waterproof sealing function according to claim 6, characterized in that: Both ends of the outer ring (1) are provided with a third limiting groove coaxial therewith, the first sealing ring (7) has a third positive ring body (73) coaxially fitted with the third limiting groove, and a third conical ring body (74) coaxially arranged on the outside of the third positive ring body (73), the third conical ring bodies (74) at both ends of the outer ring (1) are respectively abutted against the inner sides of the first sealing cover (5) and the second sealing cover (6), and the clamping openings of the third positive ring body (73) and the third conical ring body (74) are away from the axis of the outer ring (1).

8. The bearing with waterproof sealing function according to claim 7, characterized in that: Both ends of the inner ring (2) are provided with fourth limiting grooves coaxial therewith, the second sealing ring (8) has a fourth positive ring body (83) coaxially fitted with the fourth limiting groove, and a fourth conical ring body (84) coaxially arranged on the outside of the fourth positive ring body (83), the fourth conical ring bodies (84) at both ends of the inner ring (2) are respectively abutted against the inner sides of the first sealing cover (5) and the second sealing cover (6), and the clamping openings of the fourth positive ring body (83) and the fourth conical ring body (84) are oriented toward the axis of the inner ring (2).

9. A bearing with waterproof sealing function according to claim 8, characterized in that: The first sealing cover (5) and the second sealing cover (6) have the same structure and correspond to each other. A third annular surface and a fourth annular surface are provided on the inner sides of the first sealing cover (5) and the second sealing cover (6). The third conical ring body (74) coaxially abuts against the third annular surface, and the fourth conical ring body (84) coaxially abuts against the fourth annular surface.

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