CN209217852U - Direct driving motor and its electric tool - Google Patents

Abstract

The utility model discloses a kind of direct driving motor and its electric tools, the electric tool includes direct driving motor, the direct driving motor includes stator and rotor, the stator includes stator core, the motor includes that the rotor has integrally formed casing, with bottom wall and the peripheral wall being connected with bottom wall on the casing, wherein, ventilation hole is offered on the bottom wall of the casing to form fan, and several magnetic sheets are provided on the peripheral wall.The advantages that motor driven torque of such structure is big, directly drives high-efficient, and complete machine noise is small, vibration is low, high-efficient.

Description

Direct driving motor and its electric tool

Technical field

The utility model relates to field of power tools, and in particular to direct driving motor and the electric tool with direct driving motor.

Background technique

In general, using brushless outer rotor motor on electric tool, need to pass motor output torque by gear drive It is delivered on electric tool output end, the efficiency value of such complete machine is more much smaller than the efficiency value of motor.

Recently, a kind of new direct driving motor of researching and designing on electric tool, that is, directly drive electric tool output shaft, take Disappear intermediate transmission mechanism, it is possible to reduce transmission bring loss improves overall efficiency.

Chinese patent CN101987426B and CN102029565B disclose a kind of by the hand-held of direct driving motor driving respectively Abrasive machine, including motor transfer part and revolution shell, motor transfer part are incorporated into the revolution shell of motor, so that the motor of outward rotation type turns Portion makees revolution driving, and the shaft of motor transfer part is for being coaxially disposed grinding wheel, so that grinding wheel or circular saw make grinding or cutting work is made Industry does not disclose motor transfer part in such scheme and turns round the internal structure of shell, and and is not provided with the radiator structure of effect.

Makita company United States Patent (USP) US8816545B2, US20130333228A1 discloses another kind and is driven by direct driving motor Dynamic electric tool, with reference to Fig. 4, direct driving motor includes stator 12 and the rotor 13 that is mounted on motor shaft 15, and stator 4 is by stator Supporting element 30 support, bearing 33 be used to support 15 rear end of motor shaft, in 15 front end of motor shaft, provide independent fan 34 carry out it is scattered Heat.

In electric tool, it is urgently to be resolved at present that how design driven torque is big and the direct driving motor of good heat dissipation effect The problem of.

Utility model content

In order to solve the deficiencies in the prior art, the main purpose of the utility model is to provide a kind of compact-sized and heat dissipations Effect good direct driving motor and its electric tool.

To realize above-mentioned main purpose, on the one hand the utility model provides a kind of direct driving motor, including stator and rotor, institute Stating stator includes stator core, and the motor includes that the rotor has integrally formed casing, have on the casing bottom wall, And the peripheral wall being connected with bottom wall, wherein ventilation hole is offered on the bottom wall of the casing to form fan, on the peripheral wall It is provided with several magnetic sheets.

Further, it is provided with 24 magnetic sheets on the casing of the rotor, there are 18 iron core slots on the stator core, Coiling forms at least 3 phase windings on the iron core slot.

Further, the outer diameter of the motor is 55 ~ 70mm.

Further, the outer diameter of the stator is 45 ~ 55mm.

On the other hand the utility model provides a kind of electric tool, including motor shaft and motor, the motor includes stator With the rotor being mounted on motor shaft, the stator includes stator core, and the motor includes that the rotor has integrated molding Casing, with bottom wall and the peripheral wall being connected with bottom wall on the casing, wherein offered on the bottom wall of the casing logical Air holes is provided with several magnetic sheets to form fan on the peripheral wall；And drive end bearing bracket, the drive end bearing bracket are pressed into the stator simultaneously It is mounted on motor shaft.

Further, it is provided with 24 magnetic sheets on the casing of the rotor, there are 18 iron core slots on the stator core, Coiling forms at least 3 phase windings on the iron core slot.

Further, the outer diameter of the motor is in 55 ~ 70mm.

Further, the outer diameter of the stator is 45 ~ 55mm.

Further, it is mounted on motor shaft in the casing of the rotor.

Further, the casing of the rotor offers axis hole, and the casing of the rotor is mounted on motor shaft by axis hole On.

Using above-mentioned direct driving motor and its electric tool, motor driven torque is big, directly drive it is high-efficient, and at the same time in motor Fan is formed on rotor, complete machine noise is small, vibration is low, and it is high-efficient, have good heat dissipation, service life long, cruising ability height etc. Advantage.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of embodiment electric tool of the utility model；

Fig. 2 is the structural schematic diagram of one of direct driving motor visual angle shown in Fig. 1；

Fig. 3 is the structural schematic diagram at another visual angle of direct driving motor shown in Fig. 2；

Fig. 4 is the side view of direct driving motor shown in Fig. 2；

Fig. 5 is the partial sectional view of direct driving motor shown in Fig. 2；

Fig. 6 is the structural schematic diagram that direct driving motor shown in Fig. 2 is mounted on one of motor shaft upper rotor part visual angle；

Fig. 7 is the structural schematic diagram at another visual angle that direct driving motor shown in Fig. 6 is mounted on motor shaft upper rotor part；

Fig. 8 is the structural schematic diagram at one of the casing of rotor shown in Fig. 6 visual angle；

Fig. 9 is the structural schematic diagram at another visual angle of the casing of rotor shown in Fig. 6；

Figure 10 is the stator front view of direct driving motor shown in Fig. 2；

Figure 11 is the explosive view of direct driving motor shown in Fig. 1.

Specific embodiment

Specific introduce is made to the utility model below in conjunction with the drawings and specific embodiments.

Referring to figs. 1 to shown in Fig. 5, a kind of embodiment electric tool of the utility model, for example (,) hand-held circular saw 1, packet It includes including motor shaft 2 and motor 3, the motor 3 includes stator 31 and the rotor 33 being mounted on motor shaft 2.

The stator 31 includes stator core, that is, stator punching, and the stator punching outer diameter D is used in 45 ~ 55mm 18 iron core slots 311, each iron core slot 311 are used to around subcoil blow-down, form 3 phase windings, slot by coiling on iron core slot 311 It is used to provide flux density there is stator tooth between slot, generates electromagnetic torque, constitute stator yoke between slot and stator punching inner hole For providing yoke portion flux density.In one embodiment of the utility model, 312 facewidth T of stator tooth is 2 ~ 3mm, and the high H of yoke is 2.5~8mm。

The rotor 33 has integrally formed casing, that is, outer rotor.On the casing have bottom wall 331 and The peripheral wall 335 being connected with bottom wall 331, wherein offer ventilation hole to form fan, described on the bottom wall 331 of the casing Several magnetic sheets 40 are provided on peripheral wall 335；And drive end bearing bracket or front end-plate 35, it is described fixed that the drive end bearing bracket or front end-plate 35 are pressed into Son, and be mounted on motor shaft 2 by bearing, it can be installed together in this way with rotor.

The drive end bearing bracket or front end-plate 35 are used to be supplied to complete machine installation.Specifically, the drive end bearing bracket or front end-plate 35, Can be used to that other electronic devices, and/or structural member in electric tool, the i.e. peace of offer electronic device, and/or structural member are installed Fill region.

It is mounted on motor shaft 2 in the casing of the rotor 33.In one embodiment of the utility model, the rotor 24 magnetic sheets or magnet steel 40 are provided on 33 casing.That is, the casing of the rotor 33 be used to mounting magnetic steel 40, and with Magnet steel 40 is formed together rotor magnetic circuit, is the main pole of motor operation.In one embodiment of the utility model, the rotor Casing rotor yoke is formed using integrated stretching structure, such as drawing process realization can be passed through by cold-reduced sheet.In the utility model One embodiment in, the casing outer diameter of the rotor 33 is in 55 ~ 70mm.

In one embodiment of the utility model, magnetic sheet or magnet steel 40 are pasted on the casing surface of rotor 33.In this reality With in another novel embodiment, the magnetic sheet or magnet steel 40 can be and take shape on casing surface, not be limited herein System.

In one embodiment of the utility model, the casing of the rotor 33 offers axis hole 330, the machine of the rotor Shell is mounted on motor shaft 2 by axis hole 330.Further, between the casing axis hole 330 and the motor shaft 2 of the rotor It is provided with rotor hub 37, motor shaft 2 and rotor 33 are bound up by rotor hub 37.In an implementation of the utility model In example, the rotor hub 37 processes pressure brick on casing with carbon steel, and to be assembled together with motor shaft 2, such motor shaft 2 is filled It fits in rotor hub 37, axis 2 is combined together with rotor 33 by rotor hub 37 and passes out rotor energy.It is practical new at this In one embodiment of type, reinforcement of weld is used after the casing of the rotor 33 and the engaging portion press fitting of rotor hub 37.

With reference to Fig. 2, in one embodiment of the utility model, several ventilations are offered on the bottom wall 331 of the casing Hole, the fan for thering is tensile foldable muscle to be formed.Specifically, the casing circumferential inner surface of the rotor 33 pastes magnet steel 40, casing Bottom wall 331 there is end face, assembled in the end face center aperture of 33 casing of rotor with the motor shaft 2 of power supply machine, in casing end face Periphery on offer several ventilation holes 337, material punching press is converted into muscle, ventilation hole 337 and disposed at air vent at ventilation hole 337 Punching press is converted into muscle in a Zhou Junbu, just as fan when the rotor rotates, drives air-flow, plays heat spreading function.By in rotor 33 Casing sheet with integrally formed fan, one side motor driven torque is big, and work efficiency is high；On the other hand, direct driving motor Good heat dissipation effect.

Above-mentioned electric tool uses direct driving motor, is provided with 24 magnetic sheets on the casing of the direct drive motor rotor, described There are 18 iron core slots on stator core, coiling forms at least 3 phase windings on the iron core slot, motor outer diameter in 55 ~ 70mm, this Sample is applied on the electric tools such as angle mill, annular saw, reciprocating saw, and motor driven torque is big, directly drives high-efficient, and motor speed is less than 10000RPM, and at the same time being formed with fan on rotor, complete machine noise is small, vibration is low, high-efficient, has heat dissipation Well, the advantages that service life is long, and cruising ability is high.

The basic principles and main features and advantage of the utility model have been shown and described above.The technical staff of the industry It should be appreciated that above-described embodiment does not limit the utility model in any form, it is all by the way of equivalent substitution or equivalent transformation Technical solution obtained, all falls in the protection scope of the utility model.

Claims (10)

1. a kind of direct driving motor, including stator and rotor, the stator include stator core, which is characterized in that the motor packet It includes:

The rotor has integrally formed casing, the peripheral wall for having bottom wall on the casing and being connected with bottom wall, wherein Ventilation hole is offered on the bottom wall of the casing to form fan, and several magnetic sheets are provided on the peripheral wall.

2. direct driving motor as described in claim 1, it is characterised in that: be provided with 24 magnetic sheets, institute on the casing of the rotor Stating has 18 iron core slots on stator core, coiling forms at least 3 phase windings on the iron core slot.

3. direct driving motor as described in claim 1, it is characterised in that: the outer diameter of the motor is 55 ~ 70mm.

4. direct driving motor as described in claim 1, it is characterised in that: the outer diameter of the stator is 45 ~ 55mm.

5. a kind of electric tool, including motor shaft and motor, the motor includes stator and the rotor that is mounted on motor shaft, institute Stating stator includes stator core, which is characterized in that the motor includes:

The rotor has integrally formed casing, the peripheral wall for having bottom wall on the casing and being connected with bottom wall, wherein Ventilation hole is offered on the bottom wall of the casing to form fan, and several magnetic sheets are provided on the peripheral wall；And drive end bearing bracket, It is pressed into the stator and is mounted on motor shaft.

6. electric tool as claimed in claim 5, it is characterised in that: be provided with 24 magnetic sheets, institute on the casing of the rotor Stating has 18 iron core slots on stator core, coiling forms at least 3 phase windings on the iron core slot.

7. electric tool as claimed in claim 5, it is characterised in that: the outer diameter of the motor is in 55 ~ 70mm.

8. electric tool as claimed in claim 5, it is characterised in that: the outer diameter of the stator is 45 ~ 55mm.

9. electric tool as claimed in claim 5, it is characterised in that: be mounted on motor shaft in the casing of the rotor.

10. electric tool as claimed in claim 9, it is characterised in that: the casing of the rotor offers axis hole, the rotor Casing be mounted on motor shaft by axis hole.