Waterproof sealed bearing

Abstract

The utility model relates to the technical field of bearings, in particular to a waterproof sealed bearing which comprises an outer ring, an inner ring, balls and two sealing pieces, the inner ring is arranged on the inner side of the outer ring, raceways are arranged on the inner side face of the outer ring and the outer side face of the inner ring respectively, the balls are installed in the raceways, the number of the sealing pieces is two, and the sealing pieces are arranged on the outer side face of the outer ring and the outer side face of the inner ring respectively. The two sealing pieces are symmetrically distributed at the two ends between the inner ring and the outer ring, one end of each sealing piece is arranged on the outer ring, two sealing lips are arranged at the end, close to the inner ring, of each sealing piece, two sealing grooves are formed in the outer side face of the inner ring, the two sealing lips are embedded into the two sealing grooves respectively, the sealing lips are installed in the sealing grooves, and the sealing lips are connected with the inner ring. After being used for a period of time, no gap exists between the inner ring and the inner ring, waterproof sealing can be well conducted, the two sealing lips are used for sealing, after one sealing lip loses efficacy, the other sealing lip can still achieve sealing, and the sealing effect is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field especially is related to a waterproof sealing bearing. BACKGROUND

[0002] Bearing is an important spare part in contemporary mechanical equipment. Its main function is to support mechanical rotary body, reduce its friction coefficient in the movement process, and ensure its rotation accuracy. The outer side between the inner ring body and the outer ring body of the existing bearing is provided with a bearing seal, which is an element for blocking external dust and dirt into the ball cavity and preventing the lubricating oil in the ball cavity from being thrown out during the operation of the bearing.

[0003] However, the existing waterproof sealing bearing is usually sealed against the inner and outer rings of the bearing. After a long time, the seal will wear out, causing external impurities to enter the bearing interior through the gap between the seal and the inner and outer rings of the bearing, resulting in bearing failure. Moreover, the existing seal is prone to deformation and movement during use, resulting in poor waterproof sealing function. SUMMARY

[0004] In order to improve the sealing and waterproof performance of the bearing, the utility model provides a waterproof sealing bearing.

[0005] The utility model provides a waterproof sealing bearing, adopts the following technical scheme:

[0006] A waterproof sealing bearing, comprising an outer ring, an inner ring, a ball and a seal, the inner ring is arranged on the inner side of the outer ring, the inner side surface of the outer ring and the outer side surface of the inner ring are both provided with a raceway, the ball is installed in the raceway, the seal is provided with two, the two seals are symmetrically distributed at both ends between the inner ring and the outer ring, one end of the seal is arranged on the outer ring, one end of the seal close to the inner ring is provided with two sealing lips, two sealing grooves are arranged on the outer side surface of the inner ring, and the two sealing lips are respectively embedded in the two sealing grooves.

[0007] By adopting the above technical scheme, the sealing lip is installed in the sealing groove. After a period of use, there is still no gap with the inner ring, which can better prevent water from entering, and two sealing lips are used for sealing. When one of the sealing lips fails, the other sealing lip can still realize sealing, and the sealing effect is more stable.

[0008] Further, the two ends of the outer ring are symmetrically provided with mounting grooves, the mounting grooves are provided with clamping grooves, the clamping grooves have inclined surfaces, and the end of the clamping groove close to the ball has a gap with the inner end surface of the outer ring.

[0009] Further, one end of the seal away from the sealing lip is installed in the gap between the clamping groove and the inner end surface in the outer ring.

[0010] Further, the support member is provided with a folding portion at one end thereof, the folding portion is installed in the clamping groove, and the other end of the support member extends along the sealing member to the end close to the inner ring.

[0011] Further, the inner ring is provided with a first step and a second step at two ends thereof symmetrically, one of the two sealing grooves is arranged close to the first step, and the other is arranged close to the second step.

[0012] Further, the support member is provided with at least one inclined section, the inclined section is inclined to the end away from the sealing member in the direction from the outer ring to the inner ring.

[0013] Further, the bearing is further provided with a retainer on the balls between the outer ring and the inner ring, the retainer comprises a plurality of retainer rings and connecting strips, the plurality of retainer rings are fixedly connected through the connecting strips, and the retainer rings are sleeved on the balls.

[0014] In summary, the utility model has at least one of the following beneficial technical effects:

[0015] 1. The two sealing lips are installed in the two sealing grooves of the inner ring, after a period of use and abrasion, the sealing member still does not have a gap with the inner ring, waterproof sealing can be better performed, and the use of two sealing lips enables sealing to be still realized by the other sealing lip when one of the sealing lips fails, and the sealing effect is more stable.

[0016] 2. The support member is arranged to position the axial direction of the sealing member, the probability of movement of the sealing member to the end away from the balls is reduced, and the support member provides support for the sealing member to prevent the sealing member from being deformed during work.

[0017] 3. The first step and the second step are arranged on the bearing inner ring, the first step and the second step can prevent the sealing member from moving to the side close to the balls and being deformed to the side close to the balls. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the whole application;

[0019] Figure 2 is a sectional structural schematic diagram of the whole application;

[0020] Figure 3 is a sectional structural schematic diagram of the cooperation between the sealing member and the support member of the application;

[0021] Figure 4 is a sectional structural schematic diagram of the outer ring of the application;

[0022] Figure 5 is a sectional structure schematic view of the inner ring of the application;

[0023] Figure 6 is a sectional structure schematic view of the support of the application;

[0024] Reference signs: 100, outer ring; 110, raceway; 120, mounting groove; 130, clamping groove; 140, inclined surface; 200, inner ring; 210, sealing groove; 220, first step; 230, second step; 300, ball; 400, sealing member; 410, sealing lip; 500, support; 510, folded part; 600, retainer. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the application are clearly and completely described below through specific, specific embodiments. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Those skilled in the art can easily understand other advantages and effects of the application from the content disclosed in the specification. The application can also be implemented or applied through other different specific embodiments. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0026] The application is further described below in combination with Figures 1-6 The application is further described below in combination with

[0027] The embodiment discloses a waterproof sealing bearing, referring to Figure 1 , comprising an outer ring 100, an inner ring 200, a ball 300, a sealing member 400 for sealing and waterproofing the bearing, and a support 500 for limiting and supporting the sealing member 400. The ball 300 is installed between the inner ring 200 and the outer ring 100. The sealing member 400 and the support 500 are installed at both ends between the inner ring 200 and the outer ring 100. When the bearing is used, the sealing member 400 is fixed by the end surface of the support 500 and the outer ring 100. The sealing member 400 rotates with the outer ring 100. The sealing member 400 seals the bearing. The support 500 is arranged at the end of the sealing member 400 away from the ball 300. The support 500 supports the sealing member 400 and prevents the sealing member 400 from deforming towards the end close to the support 500.

[0028] The application is further described below in combination with Figures 2-5In the embodiment, the inner ring 200 is arranged at the inner side of the outer ring 100, the inner side of the outer ring 100 and the outer side of the inner ring 200 are both provided with the raceway 110, the rolling ball 300 is arranged in the raceway 110, the seal 400 is provided with two, the two seals 400 are symmetrically arranged at two ends between the inner ring 200 and the outer ring 100, one end of the seal 400 is arranged on the outer ring 100, the end of the seal 400 close to the inner ring 200 is provided with two sealing lips 410, the outer side of the inner ring 200 is provided with two sealing grooves 210, the two sealing lips 410 are respectively embedded in the two sealing grooves 210, the rolling ball 300 between the outer ring 100 and the inner ring 200 is further provided with the retainer 600, the retainer 600 comprises a plurality of retaining rings and connecting strips, the plurality of retaining rings are fixedly connected through the connecting strips, and the retaining ring is sleeved on the rolling ball 300.

[0029] In this way, the sealing lip 410 is arranged in the sealing groove 210, and after being used for a period of time, there is still no gap between the sealing lip 410 and the inner ring 200, so that the waterproof sealing can be better performed, and the two sealing lips 410 are used for sealing, so that after one of the sealing lips 410 fails, the other sealing lip 410 can still realize sealing, and the sealing effect is more stable.

[0030] Referring to Figures 2-3 , Figure 6 In the embodiment, the two ends of the outer ring 100 are symmetrically provided with the mounting groove 120, the mounting groove 120 is provided with the clamping groove 130, the clamping groove 130 has the inclined surface 140, the end of the clamping groove 130 close to the rolling ball 300 has a gap with the inner end surface of the outer ring 100, the end of the seal 400 away from the sealing lip 410 is arranged in the gap between the clamping groove 130 and the inner end surface of the outer ring 100, the side of the seal 400 away from the rolling ball 300 is provided with the support 500, one end of the support 500 is provided with the folding portion 510, the folding portion 510 is arranged in the clamping groove 130, the other end of the support 500 extends along the seal 400 to the end close to the inner ring 200, and the support 500 and the seal 400 are both provided with at least one inclined section, which is inclined from the end close to the seal 400 to the end away from the seal 400 in the direction from the outer ring 100 to the inner ring 200.

[0031] Thus, the bent portion of the support 500 can cooperate with the inner end face of the outer ring 100 to fix the end of the seal 400 near the outer ring 100. When the bearing rotates, the support 500 and the seal 400 will rotate together with the outer ring 100 of the bearing. The two sealing lips 410 of the seal 400 will rotate relative to the inner ring 200. The support 500 can position the seal 400 in the axial direction, reducing the probability of the seal 400 moving away from the end of the ball 300, and providing support for the seal 400 to prevent deformation of the seal 400 during operation. The inclined section can prevent the sealing lips 410 from deforming outward and detaching from the sealing groove 210, thereby causing sealing failure.

[0032] Reference Figures 2-3 In this embodiment, the inner ring 200 has a first step 220 and a second step 230 symmetrically arranged at both ends. The two sealing grooves 210 are arranged one near the first step 220 and the other near the second step 230.

[0033] Thus, the first step 220 and the second step 230 can prevent the seal 400 from moving toward the side closer to the ball 300 and prevent deformation toward the side closer to the ball 300.

[0034] The implementation principle of this embodiment is as follows:

[0035] The sealing lip 410 is installed inside the sealing groove 210. After a period of use, there will still be no gap between it and the inner ring 200, which can provide good waterproof sealing. Furthermore, since two sealing lips 410 are used for sealing, even if one sealing lip 410 fails, the other sealing lip 410 can still achieve a seal, resulting in a more stable sealing effect.

[0036] The bent portion of the support member 500 can cooperate with the inner end face of the outer ring 100 to fix the end of the seal member 400 near the outer ring 100. When the bearing rotates, the support member 500 and the seal member 400 will rotate together with the outer ring 100 of the bearing. The two sealing lips 410 of the seal member 400 will rotate relative to the inner ring 200. The support member 500 can position the seal member 400 in the axial direction, reducing the probability of the seal member 400 moving away from the end of the ball 300, and providing support for the seal member 400 to prevent the seal member 400 from deforming during operation. The inclined section can prevent the sealing lip 410 from deforming outward and detaching from the sealing groove 210, thereby causing sealing failure.

[0037] The first step 220 and the second step 230 can prevent the seal 400 from moving towards the side closer to the ball 300 and prevent deformation towards the side closer to the ball 300.

[0038] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A waterproof sealed bearing, comprising an outer ring, an inner ring, balls, and seals, wherein the inner ring is disposed inside the outer ring, and raceways are provided on both the inner and outer surfaces of the outer ring and the inner ring, the balls are mounted within the raceways, and two seals are provided, symmetrically distributed at both ends between the inner and outer rings, characterized in that... One end of the seal is disposed on the outer ring, and the end of the seal near the inner ring is provided with two sealing lips. The outer surface of the inner ring is provided with two sealing grooves, and the two sealing lips are respectively embedded in the two sealing grooves. The two ends of the outer ring are symmetrically provided with mounting grooves, and the mounting grooves are provided with retaining slots. The retaining slots have inclined surfaces, and there is a gap between the end of the retaining slot near the ball and the inner end face of the outer ring. A support member is installed on the side of the seal away from the ball. One end of the support member is provided with a folded part, which is installed in the retaining slot. The other end of the support member extends along the seal towards the end near the inner ring.

2. The waterproof sealing bearing according to claim 1, characterized in that, The end of the seal away from the sealing lip is installed in the gap between the inner groove of the outer ring and the inner end face.

3. The waterproof sealing bearing according to claim 1, characterized in that, The inner ring has a first step and a second step symmetrically arranged at both ends. One of the two sealing grooves is located near the first step, and the other is located near the second step.

4. The waterproof sealing bearing according to claim 1, characterized in that, The support member is provided with at least one inclined section, which is inclined from the end near the seal to the end away from the seal in the direction from the outer ring to the inner ring.

5. The waterproof sealing bearing according to claim 1, characterized in that, A retainer is also provided on the ball between the outer ring and the inner ring. The retainer includes multiple retaining rings and connecting strips. The multiple retaining rings are fixedly connected to each other by the connecting strips, and the retaining rings are sleeved on the ball.

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