CN205870459U - Handheld electric tool's dustproof protection device of bearing - Google Patents

Abstract

The utility model discloses a handheld electric tool's dustproof protection device of bearing, including electric motor rotor axle, bearing and box, the bearing is installed between electric motor rotor axle and box, and still including dustproof gasket, dustproof gasket cover is epaxial at the electric motor rotor of box tip department, and dustproof gasket is followed the electric motor rotor axle and is rotated, forms labyrinth seals between the tip of dustproof gasket and box. The utility model has the advantages that: because dustproof gasket rotates along with the electric motor rotor axle, under the effect of the high -speed rotatory centrifugal force that produces of dustproof gasket, quilts such as dust throw away dustproof gasket surface, form the dustproof protective screen of first way, form labyrinth seals between dustproof gasket internal surface and the box surface, it reachs bearing surface's route to have prolonged the dust, form second way protective screen, formation is to handheld electric tool's the inside lubricating system's of bearing protection, and then reach the protection handheld electric tool, extension handheld electric tool life's effect.

Description

A kind of bearing anti-dust protecting device of electric hand tool

Technical field

This utility model relates to the bearing anti-dust protecting device of a kind of electric hand tool.

Background technology

Electric hand tool such as makita 4100NH, can produce a large amount of dust during work, the most existing hand-held Electric tool dustproof construction mainly installs end cap on the bearing block that bearing is other additional, and end cap seals with bearing block, end cap with pass Its motor shaft utilizes O to seal, and in actual use, owing to motor shaft rotates relative to end cap, O weares and teares After be easy to make dust to enter in bearing, be difficult in actual use effectively prevent the dust in work from entering into rotor front bearing Inside, damages rotor front bearing.

Utility model content

The purpose of this utility model is to provide the bearing anti-dust protecting device of a kind of electric hand tool, it is possible to efficient solution Certainly existing bearing seal mode easily causes dust and enters in bearing, countershaft holds the problem damaged.

In order to solve above-mentioned technical problem, this utility model is achieved through the following technical solutions: a kind of hand electric The bearing anti-dust protecting device of instrument, including rotor axis of electric, bearing and casing, described bearing is arranged on rotor axis of electric and case Between body, also including dustproof gasket, dustproof gasket is enclosed within the rotor axis of electric of casing end, and dustproof gasket is followed motor and turned Sub-axle rotates, and forms labyrinth seal between dustproof gasket and the end of casing.

Preferably, the end of described casing has the through hole that power supply machine armature spindle stretches into, the lateral wall of described casing end Having annular groove, described dustproof gasket is annular, and the endoporus of dustproof gasket is provided with inner protruding eave, and the outside eaves of dustproof gasket is provided with evagination Eaves, described inner protruding eave inserts in through hole, and evagination eaves stretches in annular groove；Extend dust as far as possible and arrive the path of bearing, formed multiple The labyrinth seal of bending.

Preferably, described through hole and the inner protruding eave matched in clearance of dustproof gasket；Dustproof gasket rotates to prevent casing from stopping.

Preferably, described dustproof gasket and rotor axis of electric interference fit；Need not use other connecting elements, it is ensured that anti- Dirt pad can rotate with rotor, prevents dust etc. from entering bearing between dustproof gasket and rotor simultaneously.

Preferably, it is provided with wool between the inwall of described bearing and casing end；Block the dust road to rotor bearing Strength, forms the 3rd road barrier

Preferably, the inwall of described casing end has the holding tank of receiving wool；Prevent Pilus Caprae seu Ovis packing ring the most convex Go out to affect bearing assembling.

Preferably, the front end of described inner protruding eave is in close contact with wool；Stop that dust enters.

Preferably, the cabinet wall corresponding with bearing outer ring has the fixing groove of annular, in described fixing groove, is provided with rubber Circle；Rubber ring is set and is easy to bearing assembling, make bearing outer ring to rotate by opposite case, the fixing groove of annular is set for fixing The position of rubber ring.

Compared with prior art, the utility model has the advantages that: owing to dustproof gasket rotates with rotor axis of electric, anti- Under the effect of the centrifugal force that dirt pad high speed rotating produces, dust etc. is thrown out of dustproof gasket surface, forms the dust-proof screen of first Barrier, forms labyrinth seal between dustproof gasket inner surface and tank surface, extend dust and arrive the path of bearing surface, formed Second barrier, forms the protection of the Bearing inner lubricating system to electric hand tool, and then reaches to protect hand electric work Tool, the effect extending electric hand tool service life.

Accompanying drawing explanation

Fig. 1 is the structural representation of the bearing anti-dust protecting device of a kind of electric hand tool of this utility model；

Fig. 2 be a kind of electric hand tool of this utility model bearing anti-dust protecting device in the sectional view of casing.

Detailed description of the invention

Refering to the embodiment of the bearing anti-dust protecting device that Fig. 1, Fig. 2 are a kind of electric hand tool of this utility model, one Planting the bearing anti-dust protecting device of electric hand tool, including rotor axis of electric 1, bearing 2 and casing 3, the end of casing 3 is recessed Font, has the through hole 6 that power supply machine armature spindle 1 penetrates in the bottom surface of casing end 5, and bearing 2 is enclosed within rotor axis of electric 1 and position In the end of concave shape, between bearing 2 and the sidewall of concave shape, it is provided with rubber ring 13, casing 3 inwall has and accommodates and solid The annular determining rubber ring 13 fixes groove 12, is provided with wool 10 between the bottom surface of bearing 2 and casing end 5, and wool 10 is enclosed within On rotor axis of electric 1, the bottom surface of casing end 5 also has the holding tank 11 accommodating wool 10, rotor axis of electric 1 also overlaps Having the dustproof gasket 4 rotated with rotor axis of electric 1, it is outside that dustproof gasket 4 is positioned at casing 3, dustproof gasket 4 and casing end Labyrinth seal is formed between 5.

Dustproof gasket 4 is annular, and its endoporus is provided with inner protruding eave 8, and inner protruding eave 8 can be several compositions, preferably annulars, In inner protruding eave 8 inserts the through hole 6 of casing end 5 and with through hole 6 matched in clearance but with rotor axis of electric 1 interference fit, anti- The outside eaves of dirt pad 4 is provided with evagination eaves 9, and evagination eaves 9 is adjacent to the outer wall of casing 3 as far as possible, it is also possible to offer on casing 3 outer wall Annular groove 7, the evagination eaves 9 of dustproof gasket 4 is positioned at annular groove 7, prevents evagination eaves 9 from protruding casing 3 and affects other elements or right Operator causes damage, the cross section of such dustproof gasket 4 to be also concave shape, forms labyrinth seal with casing 3.

In the course of the work, when the particulate matters such as the dust produced flow to dustproof gasket 4, due to dustproof gasket 4 high-speed rotary Changing the line of production under the effect of raw centrifugal force, dust etc. is thrown out of dustproof gasket 4 surface, forms the dust-proof barrier of first, dustproof gasket 4 Form labyrinth seal between inner surface and casing 3 surface, extend dust and arrive the path on bearing 2 surface, form second screen Barrier, uses wool 10 to seal simultaneously, blocks the dust road strength to rotor bearing 2, form the 3rd road screen between rotor, casing 3 Barrier, by the protection to bearing 2 internal lubricating system of electric hand tool of above-mentioned 3 the dust-proof schematic design making, and then reaches to protect Protect electric hand tool, the effect extending electric hand tool service life.

The foregoing is only specific embodiment of the utility model, but technical characteristic of the present utility model is not limited to This, any those skilled in the art is in field of the present utility model, and change or the modification made all are contained in this practicality new Among the scope of the claims of type.

Claims (8)

1. a bearing anti-dust protecting device for electric hand tool, including rotor axis of electric (1), bearing (2) and casing (3), Described bearing (2) is arranged between rotor axis of electric (1) and casing (3), it is characterised in that: also include dustproof gasket (4), dust-proof Pad (4) is enclosed within the rotor axis of electric (1) at casing end (5) place, and dustproof gasket (4) is followed rotor axis of electric (1) and rotated, anti- Labyrinth seal is formed between the end of dirt pad (4) and casing (3).

The bearing anti-dust protecting device of a kind of electric hand tool the most as claimed in claim 1, it is characterised in that: described casing (3) end has the through hole (6) that power supply machine armature spindle (1) stretches into, and the lateral wall of described casing end (5) has annular groove (7), Described dustproof gasket (4) is annular, and the endoporus of dustproof gasket (4) is provided with inner protruding eave (8), and the outside eaves of dustproof gasket (4) is provided with Evagination eaves (9), described inner protruding eave (8) inserts in through hole (6), and evagination eaves (9) stretches in annular groove (7).

The bearing anti-dust protecting device of a kind of electric hand tool the most as claimed in claim 2, it is characterised in that: described through hole (6) with inner protruding eave (8) matched in clearance of dustproof gasket (4).

4. the bearing anti-dust protecting device of a kind of electric hand tool as described in claim 1 or 2 or 3, it is characterised in that: institute State dustproof gasket (4) and rotor axis of electric (1) interference fit.

The bearing anti-dust protecting device of a kind of electric hand tool the most as claimed in claim 2 or claim 3, it is characterised in that: described Wool (10) it is provided with between the inwall of bearing (2) and casing end (5).

The bearing anti-dust protecting device of a kind of electric hand tool the most as claimed in claim 5, it is characterised in that: described casing The holding tank (11) accommodating wool (10) is had on the inwall of end (5).

The bearing anti-dust protecting device of a kind of electric hand tool the most as claimed in claim 5, it is characterised in that: described convex The front end of eaves (8) is in close contact with wool (10).

8. the bearing anti-dust protecting device of a kind of electric hand tool as described in claim 1 or 2 or 3, it is characterised in that: with Have the fixing groove (12) of annular on casing (3) inwall that bearing (2) outer ring is corresponding, in described fixing groove, be provided with rubber ring (13).