CN112377528A

CN112377528A - Dust cap and insert bearing

Info

Publication number: CN112377528A
Application number: CN202011226534.8A
Authority: CN
Inventors: 李伯建
Original assignee: Huzhou Sanduo Bearing Co ltd; Zhejiang 8+1 Precision Machinery Co Ltd
Current assignee: Huzhou Sanduo Bearing Co ltd; Zhejiang 8+1 Precision Machinery Co Ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-02-19

Abstract

The invention provides a dust cap and an outer spherical surface bearing, belonging to the technical field of bearings.

Description

Dust cap and insert bearing

Technical Field

The invention relates to the technical field of bearings, in particular to a dust cover and an outer spherical bearing.

Background

The outer spherical ball bearing is a kind of deep groove ball bearing and features that its outer ring has spherical outer surface and may be fitted into the corresponding concave spherical surface of bearing seat to regulate the center. Because the use working environment is severe, double-layer sealing is needed. After the bearing is used for a period of time, grease needs to be added, and the grease is added through the hole on the outer ring by the oil gun. The grease can spill over from the external diameter department of shield after filling up, simultaneously because the increase of bearing internal pressure can be released sealing washer and shield to the outside, arouses not hard up of shield, influences sealed effect, and then reduces the life-span of bearing.

Based on the above, the application of the present application is provided

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the dust cover and the spherical outside surface bearing, solves the problem of reduced sealing effect of the bearing caused by grease filling in the prior art, and prolongs the service life of the bearing.

In order to achieve the purpose, the dustproof cover structure of the invention is as follows: the dustproof cover comprises a dustproof cover body, wherein a leakage hole is formed in the inner diameter of the dustproof cover body.

Through above-mentioned technical scheme at the internal diameter department of shield increase the grease leakage hole, unnecessary grease can directly spill over from leaking the hole when the grease is filled up, and then effectively prevents to take place owing to the condition that the filling grease arouses the increase of bearing internal pressure to prevent that the shield from becoming flexible, improving bearing seal effect, prolonging the life of bearing.

To be suitable for use, the invention further provides the following: the leakage holes are uniformly distributed.

In order to meet the actual use requirement, the invention further comprises the following steps: the number of the leakage holes is 4-6, the number of the leakage holes is too small, the speed of discharging grease is slow, the effect is poor, and when the leakage holes are too much exposed to the sun, the sealing performance of the bearing is easily influenced.

The invention further provides the following: the leakage hole is formed by punching, so that the leakage hole is convenient to process, and the effect of guiding out grease in the leakage hole and the effect of the leakage hole are improved by utilizing the punching track formed on the outer surface of the dustproof cover body in a punching processing mode.

The invention further provides the following: the leakage hole is a circumferential notch, and the hole can be expanded in a limited space as much as possible through the notch, so that the oil discharge efficiency of a single leakage hole is improved.

The invention further provides the following: the leakage hole also comprises a punching shallow groove communicated with the circumferential punching notch. Through the shallow slot that punches a hole, it can be discharged on it with the grease water conservancy diversion that overflows in the dashing breach, avoids grease to block up in dashing breach department for the discharge effect of grease.

In order to facilitate processing and improve the flow guide effect, the invention is further provided with the following components: the shallow grooves for punching are triangular.

The invention further provides the following: the punching shallow grooves are located on the outer surface of the dustproof cover body.

In order to simplify the structure and provide practical feasibility for processing the leakage hole, the invention is further provided with the following steps: the leakage hole is arranged in a concave mode and protrudes out of the inner surface of the dustproof cover body.

Another object of the present invention is to provide an insert bearing, which includes a bearing inner ring, a bearing outer ring, a seal ring, a rolling body, a cage, and the dust cap as described above.

Above-mentioned technical scheme adopts the shield that has the leakage hole, and the clearance through leaking between hole and the bearing inner race will be annotated to the inside unnecessary grease discharge of bearing, and then prolong the sealed effect and the life of bearing.

In order to help the excess grease discharge, the insert bearing structure is further provided with: and an outer chamfer is arranged at the outer diameter of the bearing inner ring matched with the inner diameter of the dust cover.

The invention has the following beneficial effects: according to the invention, the leakage hole is additionally arranged on the inner diameter of the dustproof cover, and the leakage hole is in clearance fit with the bearing inner ring, so that a dischargeable channel is provided for redundant grease filled into the bearing, and the problems of bearing sealing failure and shortened service life caused by grease filling in the prior art are effectively solved.

Secondly, the invention has simple structure, ingenious conception, high feasibility and low marginal cost.

Drawings

Fig. 1 is an overall schematic view of a dust cap according to an embodiment of the present invention.

FIG. 2 is a schematic side view of a dust cap according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of fig. 2A.

FIG. 4 is a schematic view of the back of the dust cap according to the embodiment of the present invention.

Fig. 5 is a schematic front view of an outer spherical bearing according to an embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of an outer spherical bearing according to an embodiment of the present invention.

Fig. 7 is a partially enlarged view of fig. 6.

Fig. 8 is a partially enlarged schematic view of fig. 5.

Reference numerals: 1-dust cap, 2-bearing inner ring, 3-retainer, 4-bearing outer ring, 5-steel ball, 6-sealing ring; 101-dust cap body, 102-lower bulge, 103-leakage hole, 103 a-punched shallow groove.

Detailed Description

Embodiment 1 as shown in fig. 1, this embodiment provides a dust cap 1, which includes a

dust cap body

101, and 4 leakage holes 103 uniformly distributed are disposed at an inner diameter of the dust cap body 101. The leak hole 103 is formed by punching, and includes a circumferential notch and a shallow hole 103 a. The punching notch is arranged on the inner diameter of the dust cover body 101 (the inner wall of the inner hole of the dust cover 1 is used as the inner diameter in the invention) so that the dust cover 1 can be communicated with the inner diameter of the bearing after being assembled and used. As shown in fig. 3, the shallow punched grooves 103a are located on the outer surface of the dust cap body 101 (the side of the rolling elements facing the inside of the bearing when the dust cap 1 is used is the inside, and vice versa) and communicate with the punched holes. The shallow punching groove 103a is a triangular shallow groove which gradually contracts from both ends of one side communicating with the punching notch and decreases in groove depth, and which contracts to one end and aligns with the surface of the dust cap body 101 when reaching the outer side thereof.

In the present embodiment, the shallow punched slot 103a is designed as a shallow slot structure with gradually tapering structure for the purpose of: after the shallow punching groove 103a is matched with the punching notch to lead out the lubricating grease flowing into the punching notch to the outer surface of the dust cover 1, the shallow punching groove 103a can be prevented from having space and structural characteristics for accommodating the lubricating grease, and the lubricating grease flowing into the shallow punching groove 103a can be rapidly discharged out of the shallow punching groove 103a through the contracted side of the shallow punching groove, so that other lubricating grease can be conveniently discharged.

In a preferred embodiment, the shallow punched hole grooves 103a and the punched-out notches may be formed together during the punching process, thereby facilitating the processing.

Embodiment 2 the present embodiment is different from embodiment 1 in that the number of the leakage holes 103 in the present embodiment is 5 or 6, which can be uniformly distributed as described in embodiment 1.

Example 3 this example differs from example 1 in that: in this embodiment, the leak hole 103 is formed by punching. The advantage of forming by stamping is that the problem that the leakage hole 103 is difficult to process by stamping due to insufficient thickness of the dust cap body 101 can be ignored, and the structural design of the dust cap body 101 is simplified.

Embodiment 4 as shown in fig. 3, the present embodiment is different from the above embodiments in that: in this embodiment, the leakage hole 103 is formed in the dust cap body 101, and the thickness of the leakage hole 103 is increased in advance, i.e., even if the final leakage hole 103 is formed as the lower convex portion 102, the lower convex portion 102 is recessed from the outer surface of the dust cap body 101 but protrudes from the inner surface of the dust cap body 101. The thickened part can be formed according to the specific shape of the leakage hole 103 in a matching way, and the thickness of the final finished product leakage hole 103 is ensured to be consistent with that of the dust cover body 101.

Example 6 this example differs from the above example in that: in this embodiment, the leakage hole 103 only includes a punching notch opened at the inner diameter of the dust cap body 101.

Embodiment 7 this embodiment provides an insert bearing comprising a bearing inner race 2, a bearing outer race 4, a seal ring 6, steel balls 5, a cage 3, and a dust cap 1 as in any of embodiments 1 to 6 above. After the dust cover 1 is assembled, a channel for lubricating grease to flow out is formed between the outer diameters of the coaxial bearing inner rings 2 at the position where the dust cover 1 is provided with the punched notch, and therefore in the process of filling grease, redundant grease is discharged through the channel.

In the embodiment having the punch shallow grooves 103a, the excess grease can be smoothly and quickly discharged by the cooperation of the punch shallow grooves 103a and the punch notches.

Of course, in a preferred embodiment, an outer chamfer may be provided at the outer diameter where the bearing inner ring 2 is matched with the inner diameter of the dust cap 1, so as to enlarge the channel at the outer side of the punching gap, thereby providing further help for the outflow of the grease.

In summary, the present invention provides a dust cap 1 with a leakage hole 103 and an outer spherical bearing using the dust cap 1, and by using the dust cap 1 with the leakage hole 103, the present problems of reduced bearing sealing performance and shortened service life due to the dust cap 1 being spread by internal pressure caused by excessive grease filling can be effectively solved.

Claims

1. The utility model provides a dust cover, includes the dust cover body, its characterized in that: and a leakage hole is formed in the inner diameter of the dustproof cover body.

2. The dust cover of claim 1, wherein: the leakage holes are uniformly distributed.

3. The dust cover of claim 1, wherein: the number of the leakage holes is 4-6.

4. The dust cover of claim 1, wherein: the leakage hole is formed by punching.

5. The dust cover of claim 1, wherein: the leakage hole is a circumferential notch.

6. The dust cover of claim 1, wherein: the leakage hole also comprises a punching shallow groove communicated with the circumferential punching notch.

7. The dust cover of claim 1, wherein: the shallow punching groove is triangular; and/or the shallow punched groove is positioned on the outer surface of the dustproof cover body.

8. The dust cover of claim 1, wherein: the leakage hole is arranged in a concave mode and protrudes out of the inner surface of the dustproof cover body.

9. An insert bearing, characterized by: comprising a bearing inner ring, a bearing outer ring, rolling bodies and a dust cap according to claims 1-8.

10. An spherical outer bearing as claimed in claim 9, wherein: and an outer chamfer is arranged at the outer diameter of the bearing inner ring matched with the inner diameter of the dust cover.