CN213298615U

CN213298615U - Sealed bearing and contain its electric tool

Info

Publication number: CN213298615U
Application number: CN202021892284.7U
Authority: CN
Inventors: 王成林
Original assignee: Shanghai Tungpei Enterprise Co ltd
Current assignee: Shanghai Tungpei Enterprise Co ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-05-28
Anticipated expiration: 2030-09-02

Abstract

The utility model discloses a sealed bearing and contain its electric tool, sealed bearing includes inner ring, outer loop and sealing member, the outer loop cover is located the inner ring outside, the sealing part sets up the side of inner ring, the sealing member is the ring form, the internal diameter of sealing member is greater than the internal diameter of inner ring, the external diameter of sealing member is less than the internal diameter of outer loop. The power tool includes a sealed bearing as described above. The annular sealing piece is arranged on the side face of the inner ring, and the sealing piece is used for plugging a gap between the inner ring and the outer ring, so that impurities can be prevented from entering the sealing bearing, and the sealing performance of the sealing bearing is improved. Because the sealing element is only connected with the inner ring, the energy use efficiency of the sealed bearing is not reduced by the sealing element.

Description

Sealed bearing and contain its electric tool

Technical Field

The utility model relates to a sealed bearing and contain its electric tool.

Background

In recent years, due to the influence of greenhouse effect, environmental awareness of various countries has increased, and there is an increasing demand for reducing the amount of energy used and increasing the efficiency of energy use. In the case of bearings, in order to meet the above requirements, there is a strong demand for reduction of the torque of the bearings, and in the case of sealed rolling bearings, the demand is more intense.

At present, the sealing of the bearing usually adopts a contact type sealing part. The seal member is interposed between the inner ring and the outer ring of the bearing, and the interference of the seal member is generally required to be increased in order to improve the sealing performance and to prevent impurities such as rainwater and muddy water from entering. However, after the interference of the sealing component is increased, the friction force of the bearing is increased, so that the rotating speed of the bearing is reduced, and the energy utilization efficiency of the bearing is not improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the above-mentioned not enough of current existence, the utility model provides a sealed bearing and contain its electric tool.

The utility model discloses a realize through following technical scheme:

the utility model provides a sealed bearing, sealed bearing includes inner ring, outer loop and sealing member, the outer loop cover is located the outside of inner ring, the sealing part sets up the side of inner ring, the sealing member is the ring form, the internal diameter of sealing member is greater than the internal diameter of inner ring, the external diameter of sealing member is less than the internal diameter of outer loop.

Further, the seal is connected to the inner ring by a three-point butt weld, and three weld points are uniformly arranged on the circumferential surface of the seal bearing.

Further, the number of the sealing elements is two, and the two sealing elements are respectively arranged on two side surfaces of the inner ring.

Further, the material of the sealing element is SPCC.

Further, the seal bearing further comprises a seal plate, seal grooves are formed in the two sides of the raceway groove of the inner diameter surface of the outer ring and the two sides of the raceway groove of the outer diameter surface of the inner ring, and the inner side surface of the seal plate and the outer side surface of the seal plate are embedded in the raceway grooves on the same side face respectively.

Further, a gap is formed between the outer side surface of the sealing plate and the inner side surface of the sealing member.

Further, the sealing plate is a rubber sealing plate.

A power tool comprising a sealed bearing as described above.

The beneficial effects of the utility model reside in that: the annular sealing piece is arranged on the side face of the inner ring, and the sealing piece is used for plugging a gap between the inner ring and the outer ring, so that impurities can be prevented from entering the sealing bearing, and the sealing performance of the sealing bearing is improved. Because the sealing element is only connected with the inner ring, the energy use efficiency of the sealed bearing is not reduced by the sealing element.

Drawings

Fig. 1 is a schematic structural diagram of a sealed bearing according to an embodiment of the present invention.

Description of reference numerals:

sealed bearing 10

Inner ring 11

Outer ring 12

Seal 13

Sealing plate 14

Rolling bodies 15

Raceway groove 16

Seal groove 17

Detailed Description

The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced.

As shown in fig. 1, the embodiment discloses a sealed bearing 10, the sealed bearing 10 includes an inner ring 11, an outer ring 12 and a sealing element 13, the outer ring 12 is sleeved outside the inner ring 11, a sealing portion is disposed on a side surface of the inner ring 11, the sealing element 13 is annular, an inner diameter of the sealing element 13 is larger than an inner diameter of the inner ring 11, and an outer diameter of the sealing element 13 is smaller than an inner diameter of the outer ring 12. In the sealed bearing 10 of the present embodiment, the annular sealing member 13 is disposed on the side surface of the inner ring 11, and the sealing member 13 is used to seal the gap between the inner ring 11 and the outer ring 12, so that impurities can be prevented from entering the sealed bearing 10, and the sealing performance of the sealed bearing 10 is improved. Since the seal 13 is connected only to the inner ring 11, the seal 13 does not reduce the energy use efficiency of the sealed bearing 10.

The seal 13 of this embodiment is sized to have an inner diameter slightly larger than the inner diameter of the inner ring 11 to ensure that the sealed bearing 10 can be incorporated into a mandrel. The outer diameter of the seal 13 is sized slightly smaller than the inner diameter of the outer ring 12 to ensure that the outer diameter of the seal 13 does not rub against the outer ring 12.

The present embodiment may also be a power tool that includes a sealed bearing 10 as described above.

In order to increase the stability of the sealing element 13, the sealing element 13 is connected to the inner ring 11 by means of a three-point butt-weld, the three weld points being arranged uniformly on the circumferential surface of the sealing bearing 10, i.e. on the circumferential surface of the inner ring 11.

In order to improve the sealing performance of the seal bearing 10, the number of the seals 13 is two, and the two seals 13 are respectively disposed on both side surfaces of the inner ring 11. To improve the reliability of the sealing material 13, the material of the sealing material 13 is SPCC.

In a preferred embodiment, the sealed bearing 10 further includes a seal plate 14, seal grooves 17 are provided on both sides of the raceway groove 16 on the inner diameter surface of the outer ring 12 and both sides of the raceway groove 16 on the outer diameter surface of the inner ring 11, and the inner surface of the seal plate 14 and the outer surface of the seal plate 14 are fitted in the raceway grooves 16 on the same side surface, respectively. In a preferred embodiment, the sealing plate 14 is a rubber sealing plate 14.

In order to increase the energy efficiency, a gap is provided between the outer side surface of the sealing plate 14 and the inner side surface of the sealing member 13.

As a preferred embodiment, the sealed bearing 10 may further include an outer ring 12, an inner ring 11, a plurality of rolling bodies 15, a plastic retainer, grease, a sealing plate 14, and a sealing member 13, wherein an inner diameter surface of the outer ring 12 is provided with a raceway groove 16, an outer diameter surface of the inner ring 11 is provided with a raceway groove 16 radially corresponding to the raceway groove 16 of the outer ring 12, the plastic retainer is located in the raceway groove 16 of the inner ring 11 and the raceway groove 16 of the outer ring 12, the plurality of rolling bodies 15 are placed in pockets of the plastic retainer, the grease fills the inside of the sealed bearing 10, the sealing member 13 is welded to a width surface of the inner ring 11, and the sealing member 13 and the sealing plate 14 perform double sealing. The sealed bearing 10 of the present embodiment is capable of operating in a harsh environment. Under the condition of not increasing the friction torque, the sealing bearing 10 can prevent external foreign matters from invading into the sealing bearing 10, so that the grease failure is avoided, the lubricating effect of the grease is avoided being reduced, and the failure of the sealing bearing 10 is avoided being caused.

Selecting different types of bearings for testing, installing the bearings into an electric tool, testing under 3 conditions, measuring the surface temperature of the machine, decomposing the bearings after testing, and observing whether other gear oil invades the bearings. The bearing of this embodiment is provided with both a rubber seal plate 14 and a seal 13. As comparative examples, the bearings were provided with only rubber sealing plates or only special rubber sealing plates. The relevant experimental data are shown in the table below.

From the above test results, it is understood that the seal bearing 10 of the present embodiment in which the rubber seal plate 14 and the seal 13 are provided has no gear oil entering the inside of the seal bearing 10, and the surface of the electric power tool is 50 degrees or less.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. The utility model provides a sealed bearing, its characterized in that, sealed bearing includes inner ring, outer loop and sealing member, the outer loop cover is located the outside of inner ring, the sealing member sets up the side of inner ring, the sealing member is the ring form, the internal diameter of sealing member is greater than the internal diameter of inner ring, the external diameter of sealing member is less than the internal diameter of outer loop.

2. The sealed bearing of claim 1, wherein said seal is connected to said inner ring by a three-point butt weld, three welds being evenly disposed on a circumferential surface of said sealed bearing.

3. The sealed bearing of claim 1, wherein said number of seals is two, two of said seals being disposed on each side of said inner ring.

4. The sealed bearing of claim 1, wherein said seal is SPCC.

5. The sealed bearing of claim 1, further comprising a sealing plate, wherein sealing grooves are formed on both sides of the raceway groove on the inner diameter surface of the outer ring and both sides of the raceway groove on the outer diameter surface of the inner ring, and an inner side surface of the sealing plate and an outer side surface of the sealing plate are respectively fitted into the raceway grooves on the same side surface.

6. The sealed bearing of claim 5, wherein a gap is provided between an outer side of the seal plate and an inner side of the seal.

7. The sealed bearing of claim 5, wherein said seal plate is a rubber seal plate.

8. A power tool comprising a sealed bearing according to any one of claims 1 to 7.