CN220358914U

CN220358914U - Dustproof and waterproof structure of electric tool

Info

Publication number: CN220358914U
Application number: CN202321732468.0U
Authority: CN
Inventors: 支伟亮
Original assignee: Huali Electric Manufacturing Co ltd
Current assignee: Huali Electric Manufacturing Co ltd
Priority date: 2023-07-04
Filing date: 2023-07-04
Publication date: 2024-01-16
Anticipated expiration: 2033-07-04

Abstract

The utility model discloses a dustproof and waterproof structure of an electric tool, which comprises a casing, a stator and a rotor, wherein a bearing chamber is arranged in the casing; the dustproof and waterproof structure locate between stator and the bearing room, dustproof and waterproof structure include dirt proof boot and dust ring, the dirt proof boot fix on the stator end plate of the tip of stator, the dust ring is installed at the tip of rotor and is located the dirt proof boot, dust ring and dirt proof boot constitute labyrinth structure, thereby the tip of dirt proof boot and the tip of dust ring closely laminate with the lateral wall of bearing room and seal the bearing room. According to the utility model, the dustproof and waterproof structure formed by the dustproof sleeve and the dustproof ring is arranged between the bearing chamber and the stator, so that dust, sludge and water vapor entering the machine can not enter the bearing chamber, a good working environment of the bearing is provided, and the service life of the bearing can be greatly prolonged.

Description

Dustproof and waterproof structure of electric tool

Technical Field

The utility model belongs to the technical field of electric tools, and particularly relates to a dustproof and waterproof structure of an electric tool.

Background

In the prior art, most of the stators, especially brushless grooving machines, and bearing chambers in a machine shell are directly opened, or parts are connected with each other, but the connection parts of the parts are provided with a plurality of openings, so that the whole machine cannot be closed.

The main drawbacks of this power tool are: dust and vapor easily enter a bearing chamber, the bearing works in an environment full of dust and vapor, and dust and water easily enter the bearing to damage a scattered frame, so that a rotor rubs iron, and a machine is damaged.

Disclosure of Invention

Based on the problems existing in the background technology, the utility model aims to provide a novel dustproof and waterproof structure, and the dustproof and waterproof structure is designed between a stator and a shell bearing chamber to be connected, so that dust and water can be effectively prevented from entering the bearing chamber, a good working environment of a bearing is provided, and the service life of the bearing is greatly prolonged, so that the service life of a machine is prolonged.

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

the utility model relates to a dustproof and waterproof structure of an electric tool, which comprises a casing, a stator and a rotor, wherein a bearing chamber is arranged in the casing, a bearing is arranged in the bearing chamber, the stator is sleeved on the rotor and is matched with the rotor, and the end part of the rotor is connected with the bearing in the bearing chamber; the dustproof and waterproof structure locate between stator and the bearing room, dustproof and waterproof structure include dirt proof boot and dust ring, the dirt proof boot fix on the stator end plate of the tip of stator, the dust ring is installed at the tip of rotor and is located the dirt proof boot, dust ring and dirt proof boot constitute labyrinth structure, thereby the tip of dirt proof boot and the tip of dust ring closely laminate with the lateral wall of bearing room and seal the bearing room.

Preferably, the dustproof sleeve is a round thin-wall piece, a plurality of fixing ribs are arranged on the outer ring of the dustproof sleeve at equal intervals, fixing round holes are formed in the tail ends of the ribs, and the dustproof sleeve is fixed on the stator end plate by self-tapping screws.

Preferably, the end face of the dust cover is provided with a circular groove, one side part of the bearing chamber is correspondingly provided with a circular boss, and the circular boss is tightly matched with the circular groove.

Preferably, a rubber back cover is mounted on the other side of the bearing chamber.

Preferably, the dust ring is provided with centrifugal blades at one side end surface far away from the bearing chamber.

Preferably, a heat dissipation exhaust channel is arranged between the stator and the rotor and between the outer wall of the bearing chamber and the inner wall of the shell.

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

according to the utility model, the dustproof and waterproof structure formed by the dustproof sleeve and the dustproof ring is arranged between the bearing chamber and the stator, so that dust, sludge and water vapor entering the machine can not enter the bearing chamber, a good working environment of the bearing is provided, and the service life of the bearing can be greatly prolonged.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged view of A in FIG. 1;

FIG. 3 is a view showing an installation structure of the dust cap of the present utility model;

FIG. 4 is a view showing an installation structure of the dust ring of the present utility model;

labeling in the schematic illustration:

1. a housing; 2. a stator; 3. a rotor; 4. a bearing chamber; 5. a bearing; 6. a dust cover; 7. a dust ring; 8. a stator end plate; 9. a fixing rib; 10. self-tapping screw; 11. a circular groove; 12. a circular boss; 13. centrifugal blades; 14. a heat dissipation and exhaust channel; 15. a rubber back cover.

Detailed Description

The utility model will be further understood by reference to the following examples which are given to illustrate the utility model but are not intended to limit the scope of the utility model.

Referring to fig. 1 to 4, the present embodiment relates to a dust-proof and waterproof structure of an electric tool, the electric tool includes a housing 1, a stator 2 and a rotor 3, a bearing chamber 4 is provided in the housing 1, a bearing 5 is installed in the bearing chamber 4, the stator 2 is sleeved on the rotor 3 and is installed in cooperation with the rotor 3, an end of the rotor 3 is connected with the bearing 5 in the bearing chamber 4, and an end of the rotor 3 is supported by the bearing 5; the dustproof and waterproof structure is arranged between the stator 2 and the bearing chamber 4 and is used for sealing the bearing chamber 4.

Dustproof and waterproof structure in this application includes dirt guard 6 and dust ring 7, dirt guard 6 fix on stator end plate 8 of stator 5 tip, dust ring 7 is installed at the tip of rotor 2 and is located dirt guard 6, dirt ring 7 and dirt guard 6 constitute labyrinth structure, thereby the tip of dirt guard 6 and the tip of dust ring 7 closely laminate with the lateral wall of bearing chamber 4 and seal bearing chamber 4.

The dustproof cover 6 is a round thin-wall piece, three fixing ribs 9 are arranged on the outer ring of the dustproof cover 6 at equal intervals, fixing round holes are formed in the tail ends of the fixing ribs 9, and the dustproof cover 6 and the stator 2 are integrally formed through self-tapping screws 10 and fixed on the stator end plate 8.

In addition, the end face of the dust cover 6 is provided with a circular groove 11, one side part of the bearing chamber 4 is correspondingly provided with a circular boss 12, the circular boss 12 is tightly matched with the circular groove 11, and the other side of the bearing chamber 4 is provided with a rubber rear cover 15, so that the two sides of the bearing chamber 4 are sealed.

In the embodiment of the application, the dust ring 7 is provided with the centrifugal blade 13 at one side end surface far away from the bearing chamber 4, and when the rotor 3 rotates, the dust ring 7 is driven to rotate, so that the centrifugal blade 13 on the dust ring 7 can generate outward wind, and dust is further prevented from entering the bearing chamber 4.

In the embodiment of the application, stator 2 and rotor 3 between and be equipped with the heat dissipation of intercommunication between bearing room 4 outer wall and the casing 1 inner wall and exhaust the passageway 14, in the equipment start-up, there are a large amount of dust and steam to pass through from heat dissipation exhaust passageway 14, pass through dustproof and waterproof structure with bearing room 4 and heat dissipation exhaust passageway 14 isolated, dust and steam can't enter into in the bearing room 4.

In addition, it should be mentioned that during assembly, the dust cover 6 and the stator 2 are fixedly installed first, then the dust cover 6 and the stator 2 are integrally installed in the casing 1, the circular groove 11 on the end surface of the dust cover 6 is tightly matched with the circular boss 12 on the side part of the bearing chamber 4, so that the bearing chamber 4 forms a semi-closed space, then the rotor 3 provided with the dust ring 7 is installed, the dust ring 7 and the dust cover 6 form a labyrinth structure, the rotor 4 is connected with the bearing 5, and finally the rubber rear cover 15 is installed on the other side of the bearing chamber 4 to achieve the full-closed effect of the bearing chamber 4.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the actual construction is not limited thereto as illustrated in the accompanying drawings. Therefore, those skilled in the art should not creatively design structural ways and embodiments similar to the technical scheme without departing from the gist of the present utility model, and the structural ways and embodiments are all within the protection scope of the present utility model.

Claims

1. The dustproof and waterproof structure of the electric tool comprises a shell, a stator and a rotor, wherein a bearing chamber is arranged in the shell, a bearing is arranged in the bearing chamber, the stator is sleeved on the rotor and is matched with the rotor, and the end part of the rotor is connected with the bearing in the bearing chamber; the dustproof and waterproof structure is arranged between the stator and the bearing chamber and comprises a dustproof sleeve and a dustproof ring, the dustproof sleeve is fixed on a stator end plate at the end part of the stator, the dustproof ring is arranged at the end part of the rotor and is positioned in the dustproof sleeve, the dustproof ring and the dustproof sleeve form a labyrinth structure, and the end part of the dustproof sleeve and the end part of the dustproof ring are tightly attached to the side wall of the bearing chamber so as to seal the bearing chamber.

2. The dustproof and waterproof structure of the electric tool according to claim 1, wherein the dustproof sleeve is a round thin-walled piece, a plurality of fixing ribs are arranged on the outer ring of the dustproof sleeve at equal intervals, fixing round holes are formed at the tail ends of the fixing ribs, and the dustproof sleeve is fixed on the stator end plate by self-tapping screws.

3. The dustproof and waterproof structure of the electric tool according to claim 2, wherein the end face of the dustproof cover is provided with a circular groove, one side part of the bearing chamber is correspondingly provided with a circular boss, and the circular boss is tightly matched with the circular groove.

4. The dust-and-water-proof structure of a power tool according to claim 1, wherein a rubber back cover is mounted on the other side of the bearing chamber.

5. The dust-proof and water-proof structure of a power tool according to claim 1, wherein a side end surface of the dust ring remote from the bearing chamber is provided with a centrifugal blade.

6. The dustproof and waterproof structure of the electric tool according to claim 1, wherein a heat dissipation and exhaust channel is arranged between the stator and the rotor and between the outer wall of the bearing chamber and the inner wall of the casing.