CN201286041Y

CN201286041Y - Servo motor

Info

Publication number: CN201286041Y
Application number: CNU2008201658013U
Authority: CN
Inventors: 阿力; 孟令伟
Original assignee: Ningbo Phase Motion Control Co Ltd
Current assignee: Ningbo Phase Motion Control Co Ltd
Priority date: 2008-10-09
Filing date: 2008-10-09
Publication date: 2009-08-05
Anticipated expiration: 2018-10-09

Abstract

The utility model discloses a servo electric motor which employs a single bearing structure, the single bearing structure needs to be supported at both ends and to rotate relatively to the electric motor with two bearings, and shortens the length of the machine shaft greatly, thereby shortening the length of the generator casing, shortening the length of the whole electric motor, reduces the volume of the servo electric motor and also reduces the weight of the servo electric motor. The utility model obtains simplified structure, decreases the production cost of the servo electric motor greatly, and increases the economic benefit of the enterprise.

Description

A kind of servomotor

Technical field

The utility model relates to a kind of servomotor.

Background technology

In a lot of industrial equipment fields, the driver element of use is that motor normally adopts two ends to contain bearing arrangement, and stator also forms with one-piece stator punching or diffusing sheet assembly unit are folded often, and the whole length of motor is just longer like this, and weight is also heavier.For example at disclosed Chinese patent on May 31st, 2006, notification number is to disclose a kind of miniature magnetic DC motor in the patent of CN2785241Y, comprises housing, rotor, rotating shaft and bearing, and rotating shaft is movably arranged on enclosure interior by two bearings.Because the needs of installing space and mounting structure, often the motor of this spline structure also can take bigger space.Therefore motor of the prior art exists volume big, the shortcoming of Heavy Weight.

The utility model content

The technical problems to be solved in the utility model provides a kind of body length weak point, little, the lightweight servomotor of volume.

Another technical problem to be solved in the utility model provides a kind of simple in structure, servomotor that production cost is low.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: this servomotor comprises housing, stator, rotating shaft and rotor, described stator is fixed on enclosure interior, described rotor is fixed in the rotating shaft, described rotating shaft is movably arranged on enclosure interior by bearing, described housing comprises outer shroud I and is used for bearings mounted interior ring I, described interior ring I and outer shroud I link into an integrated entity and form cavity I, ring I width is less than outer shroud I width in described, described rotor comprises interior ring II that is used for being connected with rotating shaft and the outer shroud II that is used to install magnet steel, described interior ring II and outer shroud II fuse and form cavity II, ring II width is less than outer shroud II width in described, and described outer shroud II and stator are positioned at cavity I.

Servomotor of the present utility model is installed back casing and rotor in interior ring I, the embedding mutually of outer shroud II place, but housing do not contact with rotor, and rotor could be with the rotating shaft campaign like this.This structure can make the strong point of the stress point of rotating shaft and rotating shaft adjacent mutually, and then can rationally shorten shaft length.The volume that shaft length shortens the back servomotor reduces greatly, weight also alleviates greatly.

The strong point is positioned at the junction of bearing and rotating shaft, stress point is positioned at the junction of rotor and rotating shaft, because the stress point of rotating shaft and adjacent being in the same place of the strong point of rotating shaft, make the balance point of rotating shaft move on near the stress point, as of the present utility model preferred, this servomotor includes only a bearing like this.Just can guarantee the servomotor operate as normal fully by a bearing, therefore compare with conventional art that servomotor of the present utility model has saved a bearing, and structure is more simple, production cost reduces.

As of the present utility model preferred, described bearing is a double-row angular contact bal bearing.It is main radial and axial joint load and moment load that double-row angular contact bal bearing can bear bigger radial load, therefore uses double-row angular contact bal bearing can guarantee the rotating shaft steady operation of this servomotor fully.

The utility model adopts technique scheme: servomotor has adopted single bearing structure, electric machine structure with respect to two bearings, need the two end supports rotation, single bearing structure has clearly shortened the length of machine shaft, thereby shortened the length of electric machine casing, make the contraction in length of whole motor, reduced the volume of servomotor, also alleviated the weight of servomotor.Obtain on the structure simplifying, make the production cost of servomotor reduce greatly, increased the business economic benefit.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is further specified.

Fig. 1 is the structural representation of a kind of servomotor of the utility model.

Embodiment

As shown in Figure 1, this servomotor comprises housing 1, stator 2, rotating shaft 3, rotor 14 and encoder 4.Housing 1 is straight-tube shape, be made up of outer shroud I 5 and 6 two structures of interior ring I, and outer shroud I 5 and interior ring I6 is connected as a single entity; Between outer shroud I 5 and interior ring I 6, be provided with cavity I 7.Outer shroud I 5 width are bigger than interior ring I 6, so housing 1 is inside and outside stacked structure.Rotor 14 also is straight-tube shape, be made up of interior ring II 8 and 9 two structures of outer shroud II, and interior ring II 8 and outer shroud II 9 is connected as a single entity; Between interior ring II 8 and outer shroud II 9, be provided with cavity II 10.The width of outer shroud II 9 is bigger than the width of interior ring II 8, so rotor 14 also is inside and outside stacked structure.This servomotor only is provided with a double-row angular contact bal bearing 11, and in the ring I 6, rotating shaft 3 was movably connected in the housing 1 by this bearing 11 in bearing 11 was installed in.The interior ring II 8 of rotor 14 is fixed in the rotating shaft 3, and the installation seat of rotor 14 is close to bearing 11.At this moment, the outer shroud II 9 of rotor 14 is positioned at cavity I 7, and interior ring I 6 is positioned at cavity II 10, and separates between outer shroud II 9 and the interior ring I 6.More firm for bearing 11 is installed, this end that is positioned at cavity II 10 at interior ring I 6 is provided with bearing gland 12.Magnet steel 13 is installed on outer shroud II 9, and this magnet steel 13 is relative with stator 2 fronts in being installed in cavity I 7, and stator 2 is fixedlyed connected with outer shroud I 5.One end of rotating shaft 3 is connected with encoder 4.

3 of the rotating shafts of the utility model servomotor are connected with housing 1 by a bearing 11, so the length of rotating shaft 3 can rationally shorten, to reach the purpose that reduces the servomotor volume, to satisfy the requirement of installing space and mounting structure.

Claims

1, a kind of servomotor, it comprises housing (1), stator (2), rotating shaft (3) and rotor (14), described stator (2) is fixed on housing (1) inside, described rotor (14) is fixed in the rotating shaft (3), described rotating shaft (3) is movably arranged on housing (1) inside by bearing (11), it is characterized in that: described housing (1) comprises outer shroud I (5) and is used to install the interior ring I (6) of bearing (11), described interior ring I (6) and outer shroud I (5) link into an integrated entity and form cavity I (7), ring I (6) width is less than outer shroud I (5) width in described, described rotor (14) comprises interior ring II (8) that is used for being connected with rotating shaft (3) and the outer shroud II (9) that is used to install magnet steel (13), described interior ring II (8) and outer shroud II (9) fuse and form cavity II (10), ring II (8) width is less than outer shroud II (9) width in described, and described outer shroud II (9) and stator (2) are positioned at cavity I (7).

2, according to the described servomotor of claim 1, it is characterized in that: this servomotor includes only a bearing (11).

3, according to claim 1 or 2 described servomotors, it is characterized in that: described bearing (11) is a double-row angular contact bal bearing (11).