CN210715864U

CN210715864U - Shaft end sealing structure and electric tool

Info

Publication number: CN210715864U
Application number: CN201921642856.3U
Authority: CN
Inventors: 庄佳元; 张耀蔚
Original assignee: Jiangsu Hyson Electronic Technology Co ltd
Current assignee: Jiangsu Hyson Electronic Technology Co ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-06-09
Anticipated expiration: 2029-09-29

Abstract

The utility model provides a shaft end seal structure and electric tool, shaft end seal structure includes first shaft end seal structure and second shaft end seal structure, wherein first shaft end seal structure includes the dust ring, the interior disc cup joints in the output shaft end and rotates along with, the outer fringe of dust ring extends towards the front end housing and forms lip-shaped structure, the first face of front end housing forms the recess with lip-shaped structure complex, lip-shaped structure and recess cooperation form gyration seal structure, restrict the flying dust of emery wheel piece side and get into inside the electric tool, gear and bearing in the electric tool are protected effectively; the second shaft end sealing structure comprises a framework oil seal, a containing space is formed in a second face of the front end cover, the framework oil seal is installed in the containing space, scattered dust and water are prevented from entering the electric tool through the output shaft, the gear set and the bearing in the electric tool are effectively protected, and grease in the gear box can be prevented from leaking from the gear box relatively.

Description

Shaft end sealing structure and electric tool

Technical Field

The utility model relates to an electric tool makes the field, especially relates to a shaft end seal structure and electric tool.

Background

Many electric tools require machining operations such as grinding, cutting, rust removal, and polishing of metal members, and during machining of metal members, a large amount of scattered dust is generated, and the scattered dust or water easily enters the electric tool through a gap between a front end cover and an output shaft to damage components such as bearings and gears, thereby affecting the service life of the electric tool.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of axle head seal structure and electric tool has solved a large amount of dusts that fly off and has got into the inside problem of electric tool through the clearance between front end housing and the output shaft easily, has improved electric tool's life.

In order to achieve the above object, the technical solution of the present invention is specifically realized as follows:

an aspect of the utility model provides a shaft end seal structure, including primary shaft end seal structure and secondary shaft end seal structure.

The first shaft end sealing structure comprises a dust ring, the inner circle surface of the dust ring is sleeved at the output shaft end and rotates along with the output shaft end, the outer edge of the dust ring extends towards the front end cover to form a lip-shaped structure, the first surface of the front end cover forms a groove matched with the lip-shaped structure, and the lip-shaped structure and the groove are matched to form a rotary sealing structure;

the second shaft end sealing structure comprises a framework oil seal, a containing space is formed in the second surface of the front end cover, and the framework oil seal is installed in the containing space.

Further, the second shaft end sealing structure further comprises a supporting piece used for compressing and fixing the framework oil seal.

The utility model discloses an on the other hand still provides an electric tool and includes primary shaft end seal structure and secondary shaft end seal structure.

Further, the electric motor further comprises an output shaft, a grinding wheel is further mounted on a bearing of the output shaft, and the first shaft end sealing structure is located between the front end cover and the grinding wheel.

Further, both ends of the output shaft are rotatably mounted by means of a first bearing mounted in the housing and a second bearing mounted in the front end cover.

Further, an output gear is further mounted in the shell and sleeved on the output shaft, the output gear is located between the first bearing and the second bearing, and the second shaft end sealing structure is located between the second bearing and the front end cover.

The beneficial technical effects are as follows:

the utility model provides a shaft end seal structure and electric tool has solved the easy gear box that gets into in the electric tool of the dust that flies in a large number, influences the work efficiency and the life's of electric tool internal gear and bearing problem, has reached following technological effect:

1. the first shaft end sealing structure comprises a dust ring, the inner circular surface of the dust ring is sleeved at the output shaft end and rotates along with the output shaft end, the outer edge of the dust ring extends towards the front end cover to form a lip-shaped structure, the first surface of the front end cover forms a groove matched with the lip-shaped structure, the lip-shaped structure and the groove are matched to form a rotary sealing structure, and flying dust on the side of a grinding wheel piece is effectively limited from entering the interior of an electric tool from the gap between the output shaft and the front end cover;

2. the utility model discloses well second axle end seal structure includes the skeleton oil blanket, the second face of front end housing is formed with accommodation space, and the skeleton oil blanket is installed in accommodation space, prevent effectively that the dust and the water that fly off from getting into inside the electric tool from the clearance of output shaft and front end housing.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an overall structural view of an electric power tool according to an embodiment of the present invention;

fig. 2 is a partially enlarged structural view of a portion a in fig. 1 of an electric power tool according to an embodiment of the present invention.

The device comprises a bearing body, a first bearing, a shell, a second bearing, a front end cover, a rear end cover, a front end cover, a rear end cover, a front end.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The utility model discloses an aspect provides a shaft end seal structure, including primary shaft end seal structure and secondary shaft end seal structure, see fig. 2, concretely, primary shaft end seal structure includes dust ring 81, the interior disc of dust ring 81 cup joints in output shaft 7 ends and along with changeing, dust ring 81 outer fringe extends towards front end housing 4 and forms the lip structure, the first face of front end housing 4 forms and lip structure complex recess, lip structure and recess cooperation form rotary seal structure, installation clearance between front end housing 4 and the axle head just is sealed by primary shaft end seal structure like this, form primary dustproof construction, the dust that flies off of 6 sides of grinding wheel has been restricted effectively and has got into inside the electric tool by the axle head.

Further, the second axle end seal structure includes skeleton oil blanket 91, and the second face of front end housing 4 is formed with accommodation space, and skeleton oil blanket 91 is installed in accommodation space, and skeleton oil blanket 91 seals the installation clearance between front end housing 4 and the axle head from inside, forms the second way dustproof construction, and it needs the description that the second axle end seal structure in this embodiment not only can prevent that the dust from invading inside the electric tool, also can play waterproof effect.

According to the utility model discloses an embodiment is equipped with sealing washer 93 in the skeleton of skeleton oil blanket 91, and second axle end seal structure still includes support piece 92 for compress tightly fixed skeleton oil blanket 91, preferably, support piece 92 adopts the aluminium piece, and skeleton oil blanket 91 passes through the bolt fastening on support piece 92, can also adopt other fixed connection structure certainly, as long as can realize changeing be fixed in support piece 92 with skeleton oil blanket 91 on can, do not do the restriction to this.

Another aspect of the present invention is to provide an electric tool, see fig. 1, which includes a first shaft end sealing structure and a second shaft end sealing structure.

As a preferred technical solution of this embodiment, the electric tool further includes an output shaft 7, a grinding wheel 6 is further mounted at a shaft end of the output shaft 7, and the first shaft end sealing structure is located between the front end cover 4 and the grinding wheel 6, so as to prevent dust generated during cutting of the grinding wheel 6 from entering the electric tool.

As a preferred solution of the present embodiment, both ends of the output shaft 7 are rotatably mounted by means of a first bearing 1 and a second bearing 5, the first bearing 1 being mounted in the housing 2, preferably a needle bearing, whose type is HK0810, and the second bearing 5 being mounted in the front end cap 4.

As a preferred technical solution of this embodiment, an output gear 3 is further installed in the housing 2, the output gear 3 is sleeved on the output shaft 7, the output gear 3 is located between the first bearing 1 and the second bearing 5, and the second shaft end sealing structure is located between the second bearing 5 and the front end cover 4.

The utility model discloses preferred embodiment axle head seal structure's relevant theory of operation:

the electric tool needs to perform processing work such as grinding, cutting, derusting, polishing and the like on a metal component, in the process of processing the metal component, a large amount of scattered dust is generated around the grinding wheel 6, and the scattered dust or water easily enters the electric tool through the gap between the front end cover 4 and the output shaft 7 to damage a bearing, a gear and the like, the shaft end sealing structure of the embodiment solves the problems by arranging a first shaft end sealing structure and a second shaft end sealing structure, specifically, the first shaft end sealing structure comprises a dust ring 81, the inner circular surface of the dust ring 81 is sleeved at the end of the output shaft 7 and rotates along with the rotation, the outer edge of the dust ring 81 extends towards the front end cover 4 to form a lip-shaped structure, the first surface of the front end cover 4 forms a groove matched with the lip-shaped structure, the lip-shaped structure and the groove are matched to form a rotary sealing structure, and the scattered dust, thereby effectively protecting the gears and bearings inside the electric tool; further, the second shaft end sealing structure includes a skeleton oil seal 91, and the second face of the front end cover 4 is formed with a housing space in which the skeleton oil seal 91 is mounted, thereby effectively preventing scattered dust or water from entering the inside of the electric power tool from the output shaft 7.

The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims

1. A shaft end seal structure, comprising:

the first shaft end sealing structure comprises a dust ring (81), the inner circular surface of the dust ring (81) is sleeved on the shaft end and rotates along with the shaft end, the outer edge of the dust ring (81) extends towards the front end cover (4) to form a lip-shaped structure, a groove matched with the lip-shaped structure is formed in the first surface of the front end cover (4), and the lip-shaped structure and the groove are matched to form a rotary sealing structure;

second axle end seal structure, including skeleton oil blanket (91), the second face of front end housing (4) is formed with accommodation space, install skeleton oil blanket (91) in the accommodation space.

2. The shaft end seal structure of claim 1, further comprising a support (92) for compression fixing the backbone oil seal (91).

3. A power tool comprising the shaft end seal structure as recited in any one of claims 1 to 2.

4. A power tool according to claim 3, further comprising an output shaft (7), wherein the bearing of the output shaft (7) is further provided with a grinding wheel (6), and the first shaft end sealing structure is located between the front end cover (4) and the grinding wheel (6).

5. A power tool according to claim 4, characterized in that the output shaft (7) is rotatably mounted at both ends by means of a first bearing (1) and a second bearing (5), the first bearing (1) being mounted in the housing (2) and the second bearing (5) being mounted in the front cover (4).

6. An electric tool according to claim 5, characterized in that an output gear (3) is further mounted in the housing (2), the output gear (3) is sleeved on the output shaft (7), the output gear (3) is located between the first bearing (1) and the second bearing (5), and the second end sealing structure is located between the second bearing (5) and the front end cover (4).