TW201519559A - AC motor with reduction mechanism - Google Patents

Abstract

An AC motor with a reduction mechanism is disclosed. The AC motor has a stator unit, a rotor unit and a reduction transmission unit. An axial space of the AC motor can be substantially reduced by providing the reduction transmission unit directly built in the AC motor, and a path of the power transmission between the rotor unit and an output shaft can be reduced, so that the loss of the mechanical energy can be lowered.

Description

AC motor with speed reduction mechanism

The present invention relates to an AC motor, and more particularly to an AC motor having a speed reduction mechanism.

Generally, the motor and the gear reducer are industrially used power generation and transmission shifting devices. In order to improve the torque of the motor or reduce the rotational speed, the motor is usually combined with the gear reducer. Based on the workload, operating speed, and the need to maintain the motor operating at the optimum efficiency, the motor and gear reducer must be properly matched to achieve better operating characteristics.

Referring to Fig. 1, there is a conventional AC motor 11 and a gear reducer 12. The motor 11 and the gear reducer 12 are individually designed and manufactured, and then combined with each other. Generally, between the AC motor 11 and the gear reducer 12, a coupling or power transmission component (not shown) is used as a transmission and power transmission interface, and the output shaft 111 of the AC motor 11 and the gear reducer 12 are The input mechanism 121 is coupled to transmit the output torque of the AC motor 11 to the gear reducer 12 to output power.

However, since the torque provided by the AC motor 11 has to be transmitted to the gear reducer 12 via the coupling or power transmission element, the transmission path of the power is long, and the friction between the coupling or the power transmission element is Produce additional mechanical energy loss, resulting in overall low efficiency; The AC motor 11 and the gear reducer 12 are independently designed and manufactured, and part of the power transmission components, the frame, and the lock components required for combination are only used as a transition component for transmitting motion and power, or are provided. In addition to increasing the overall manufacturing and maintenance costs, the components affect the working accuracy of the system. In addition, the AC motor 11 and the gear reducer 12 are separately designed and manufactured, and the installation space is fixed and difficult to change. The installation space cannot be effectively planned, making the size of the integrated device too large.

Therefore, it is necessary to provide an AC motor with a speed reduction mechanism to solve the problems of the conventional technology.

The main object of the present invention is to provide an AC motor with a speed reduction mechanism. By integrating the reduction transmission unit and the AC motor, the reduction transmission unit is directly built into the AC motor as the AC motor. The speed reduction mechanism of the power output can greatly reduce the axial installation space of the AC motor.

Another object of the present invention is to provide an AC motor having a speed reduction mechanism, by which the reduction transmission unit is directly built in an AC motor as a speed reduction mechanism of the power output of the AC motor, thereby shortening the rotor unit The power transmission path to the output shaft to reduce the mechanical energy loss caused by friction.

In order to achieve the above object, the present invention provides an AC motor having a speed reduction mechanism, the AC motor including a certain subunit, a rotor unit and a reduction transmission unit, the stator unit including a certain sub body, a plurality of stator salient poles and a plurality of stator coils, wherein the stator salient poles are disposed on an inner annular surface of the stator body, and the stator coils are respectively wound on the stator salient poles, the rotor unit includes a rotor body, a plurality of rotor salient poles, and an outer Tooth and several rotor lines a ring, the rotor salient poles are formed on an outer annular surface of the rotor body, the outer tooth portions are formed on one outer end surface of the rotor salient poles, and the rotor coils are respectively wound on the rotor salient poles for The stator coils are mutually inductive. The reduction gear unit includes at least one transmission gear and an output shaft. The transmission gear meshes with the outer teeth of the rotor unit, and the output shaft is rotated by the transmission gear.

In an embodiment of the invention, the reduction transmission unit further includes a first transmission gear, a second transmission gear and an output gear, the first transmission gear meshes with the outer tooth portion of the rotor unit, and the second The transmission gear has fewer teeth than the first transmission gear and rotates coaxially with the first transmission gear. The output gear meshes with the second transmission gear, and the output gear is combined on the output shaft.

In an embodiment of the invention, the AC motor further includes a casing for covering the stator unit, the rotor unit and the reduction transmission unit, the casing comprising a body and a cover, the cover and the seat body In combination, the stator body is disposed on the base body, and the output shaft protrudes outside the cover body.

In an embodiment of the invention, the outer casing further includes a recess formed on the base body, and the stator body is embedded in the recess.

In order to achieve the above object, the present invention provides an AC motor having a speed reduction mechanism. The AC motor includes a certain subunit, a rotor unit and a reduction transmission unit. The stator unit includes a certain sub body and an external tooth portion. a plurality of stator salient poles and a plurality of stator coils, wherein the outer tooth portions are formed on an outer annular surface of the stator body, and the stator salient poles are disposed on an inner annular surface of the stator body, and the stator coils are respectively wound around the stator ring On the stator salient pole, the rotor unit comprises a rotor body, a plurality of rotor salient poles and a plurality of rotor coils, and the rotor salient poles are formed on the rotor In the present invention, the rotor coils are respectively wound on the salient poles of the rotor and are mutually inductively coupled to the stator coils. The reduction transmission unit includes at least one transmission gear and an output shaft, and the transmission gear and the external teeth of the stator unit The portion is meshed and rotated by the rotor body, and the output shaft is rotated by the transmission gear.

In an embodiment of the invention, the reduction transmission unit further includes a transmission arm, a first transmission gear, a second transmission gear and an output gear, one end of the transmission arm is fixed to the rotor body and received by the rotor Rotating by the body drive, the first transmission gear meshes with the outer tooth portion of the stator unit, the second transmission gear has fewer teeth than the first transmission gear, and the first and second transmission gears are pivotable coaxial assembly At the other end of one of the transmission arms, the planetary rotation is synchronized by the transmission of the transmission arm, and the output gear meshes with the second transmission gear and is combined on the output shaft.

In an embodiment of the present invention, the AC motor further includes a casing for covering the stator unit, the rotor unit, and the reduction transmission unit, the casing includes a body and a cover body, the base body and the cover body In combination, the stator system is fixed on the base body, and the output shaft protrudes outside the cover body.

In an embodiment of the invention, the base body comprises a combination member, a convex portion and a hollow shell member, the convex portion is formed on the assembly, and the hollow shell member is combined in the assembly member and the cover body. And for accommodating the stator unit, the rotor unit and the reduction transmission unit, the stator body is fitted on the convex portion.

As described above, by integrating the reduction transmission unit and the AC motor into one body, the reduction transmission unit is directly built in the AC motor as a speed reduction mechanism of the power output of the AC motor, thereby greatly reducing the AC motor axial installation space and shortened The power transmission path from the rotor unit to the output shaft is used to reduce the mechanical energy loss caused by friction, thereby further improving the overall performance.

100‧‧‧AC motor

2‧‧‧stator unit

21‧‧‧stator body

22‧‧‧ Stator salient pole

23‧‧‧statar coil

20‧‧‧ external teeth

3‧‧‧Rotor unit

31‧‧‧Rotor body

32‧‧‧Rotor salient pole

33‧‧‧Rotor coil

35‧‧‧Rotor shaft

30‧‧‧ external teeth

4‧‧‧Deceleration drive unit

41‧‧‧ Output shaft

42‧‧‧First transmission gear

43‧‧‧Second transmission gear

44‧‧‧ Output gear

48‧‧‧Transmission arm

49‧‧‧Drive shaft

5‧‧‧Shell

51‧‧‧ body

511‧‧‧assemblies

512‧‧‧ convex

513‧‧‧ hollow shell parts

52‧‧‧ Cover

53‧‧‧ recess

1 is a perspective view of a conventional AC motor and a gear reducer; FIG. 2 is an exploded perspective view of an AC motor having a speed reduction mechanism according to an embodiment of the present invention; FIG. 3 is a perspective view showing a speed reduction mechanism according to an embodiment of the present invention. A cross-sectional view of a part of an AC motor; FIG. 4 is an exploded perspective view of an AC motor having a speed reduction mechanism according to another embodiment of the present invention; and FIG. 5 is a part of an AC motor having a speed reduction mechanism according to another embodiment of the present invention. A cross-sectional view of the component.

The above and other objects, features and advantages of the present invention will become more <RTIgt; Furthermore, the directional terms mentioned in the present invention, such as upper, lower, top, bottom, front, rear, left, right, inner, outer, side, surrounding, central, horizontal, horizontal, vertical, longitudinal, axial, Radial, uppermost or lowermost, etc., only refer to the direction of the additional schema. Therefore, the directional terminology used is for the purpose of illustration and understanding of the invention.

Referring to FIG. 2, an AC motor 100 having a speed reduction mechanism according to an embodiment of the present invention includes a certain subunit 2, a rotor unit 3, a reduction transmission unit 4, and a casing 5, and the stator unit 2 The rotor unit 3 and the reduction transmission unit 4 are all built-in and assembled in the outer casing 5 of the alternating current motor 100, and are integrated into one body. The invention will be described in detail below for each component. Department structure, assembly relationship and its operating principle.

Referring to FIG. 2 , the outer casing 5 is used to cover the stator unit 2 , the rotor unit 3 and the reduction transmission unit 4 . The outer casing 5 includes a body 51 , a cover 52 and a recess 53 . The recess 53 . The circular body is formed on the seat body 51, and the cover body 52 and the seat body 51 can be combined by bolt locking.

Referring to FIGS. 2 and 3 , the stator unit 2 includes a stator body 21 , a plurality of stator salient poles 22 , and a plurality of stator coils 23 . The stator body 21 is disposed on the seat body 51 and embedded in the recessed portion. In the 53rd, the stator salient poles 22 are disposed on one inner annular surface of the stator body 21, and the stator coils 23 are respectively wound around the stator salient poles 22.

Referring to FIGS. 2 and 3, the rotor unit 3 includes a rotor body 31, a plurality of rotor salient poles 32, a plurality of rotor coils 33, a rotor shaft 35 and an outer tooth portion 30. The rotor body 31 is fixed. In the rotor shaft 35, the rotor salient poles 32 are formed on an outer annular surface (not shown) of the rotor body 31, and the rotor coils 33 are respectively wound around the rotor salient poles 32 for use with the stators The coils 23 are mutually inductive, and the rotor shaft 35 is rotatably fixed to the center of the recess 53 via a bearing (not shown). The outer tooth portion 30 is formed on an outer end surface (not shown) of the rotor salient poles 32.

Referring to Figures 2 and 3, the reduction transmission unit 4 includes an output shaft 41, a first transmission gear 42, a second transmission gear 43, an output gear 44, and a transmission shaft 49. The output shaft 41 is The first transmission gear 43 meshes with the outer tooth portion 30 of the rotor unit 3, and the first transmission gear 42 and the second transmission gear 43 are fixed to the outside of the cover body 52. On the transmission shaft 49, wherein the second transmission gear 43 has fewer teeth than the first transmission gear 43 and rotates coaxially with the first transmission gear 43 with the transmission shaft 49, and the transmission shaft 49 is fixed to the base In addition, the output gear 44 is meshed with the second transmission gear 43 , and the output gear 44 is fixedly coupled to the output shaft 41 , that is, the output shaft 41 and the output gear 44 are received by the first transmission gear 42 and The second transmission gear 43 is driven to rotate.

As shown in the second and third embodiments, according to the above configuration, after the currents of the stator coil 23 and the rotor coil 33 of the AC motor 100 are turned on, the rotor body 31 is rotated by the mutual force of the magnetic force, and the external tooth portion is further 30 drives the first transmission gear 42 to rotate, and the coaxial rotation of the first transmission gear 42 and the second transmission gear 43 causes the output gear 44 to be rotated, thereby driving the output shaft 41 to rotate synchronously, and the AC motor 100 is Power deceleration output.

With the above design, the reduction transmission unit 4 and the AC motor 100 are integrated into one body, that is, the reduction transmission unit 4 is directly built in the casing 5 as a speed reduction mechanism of the AC motor 100. In this way, the arrangement of the conventional coupling, the reducer frame and the locking zero fastener can be reduced, so that the overall structure of the AC motor 100 is more compact, lighter and easier to maintain. In addition, the AC motor 100 combines the reduction transmission unit 4 with the stator unit 2 and the rotor unit 3 (for example, directly engaging the external gear portion 30 of the rotor unit 3 to drive the first transmission gear 42), simplifying the composition thereof. The components and the axial installation space of the AC motor 100 are greatly reduced. Furthermore, the AC motor 100 can shorten the power transmission path of the rotor unit 3 to the output shaft 41, and can reduce the mechanical energy loss caused by the friction force, thereby further improving the overall performance and contributing to the application of low speed, High torque motor field.

Referring to FIG. 4, an AC motor 100 having a speed reduction mechanism according to another embodiment of the present invention is similar to the above embodiment. The interior of the AC motor 100 also includes a certain subunit 2, a rotor unit 3, and a The reduction transmission unit 4 and a casing 5 are substantially the same component name and figure number, and the stator unit 2, the rotor unit 3 and the reduction transmission unit 4 are all built-in and assembled. In the outer casing 5 of the alternating current motor 100, they are integrated into one body, but the difference in this embodiment is that the reduction transmission unit 4 is driven in a planetary gear type to reduce the transmission output, and the detailed structure of each component of the embodiment, The assembly relationship and its operation principle are as follows: Continuing to refer to FIG. 4, the outer casing 5 is used to cover the stator unit 2, the rotor unit 3 and the reduction transmission unit 4, and the outer casing 5 includes a body 51 and a cover 52. The seat body 51 includes a combination member 511, a convex portion 512 and a hollow shell member 513. The convex portion 512 is formed on the assembly member 511. The hollow shell member 513 can be locked by a bolt (not labeled). The assembly unit 511 and the cover 52 are combined to accommodate the stator unit 2, the rotor unit 3, and the reduction transmission unit 4.

Referring to FIGS. 4 and 5 , the stator unit 2 includes a stator body 21 , a plurality of stator salient poles 22 , a plurality of stator coils 23 , and an external tooth portion 20 . The stator body 21 is fixed to the base body 51 . And fitting on the convex portion 512, the outer tooth portion 22 is formed on an outer annular surface (not shown) of the stator body 21, and the stator salient poles 23 are disposed on an inner annular surface of the stator body 21, The stator coils 24 are wound around the stator salient poles 23, respectively.

Referring to FIGS. 4 and 5, the rotor unit 3 includes a rotor body 31, a plurality of rotor salient poles 32, and a plurality of rotor coils 33. The rotor salient poles 32 are formed outside the rotor body 31 and have a rotating shaft shape. The rotor coils 33 are wound around the rotor salient poles 32 and are mutually inductive with the stator coils 23.

Referring to FIGS. 4 and 5 , the reduction transmission unit 4 includes an output shaft 41 , a first transmission gear 42 , a second transmission gear 43 , an output gear 44 , a transmission arm 48 , and a transmission shaft 49 . One end of the transmission arm 48 is fixed to the rotor body 31 and is rotated by the rotor body 31. The first transmission gear 42 meshes with the outer tooth portion 22 of the stator unit 2, wherein the second transmission gear 43 The number of teeth is less than the first transmission gear 43, the first and second transmission gears 42, 43 Separately fixed at two ends of the transmission shaft 49, the middle portion of the transmission shaft 49 is pivotally assembled on the other end of the transmission arm 48, so that the first and second transmission gears 42 and 43 can be The transmission arm 48 is driven to synchronize the planetary rotation. In addition, the output gear 44 meshes with the second transmission gear 43 and is combined with the output shaft 41. The output shaft 41 extends from the inside of the cover 5 to the outside of the cover 5.

Continuing with reference to the fourth and fifth embodiments, according to the above configuration, after the currents of the stator coil 23 and the rotor coil 33 of the AC motor 100 are turned on, the rotor body 31 is rotated by the mutual force of the magnetic force, and the transmission arm is further 48 drives the first transmission gear 42 and the second transmission gear 43 to synchronously revolve. Then, the first transmission gear 42 is engaged with the tooth portion 22 outside the stator unit 2 and the external tooth portion 22 is fixed, so that the first transmission gear 42 is passively rotated; the first transmission gear 42 is transmitted through the transmission shaft 49. The second transmission gear 43 is rotated coaxially, and the second transmission gear 43 drives the output gear 44 to rotate, thereby driving the output shaft 41 to rotate synchronously, and decelerating the power of the AC motor 100. The first transmission gear 42 and the second transmission gear 43 are located on both sides of the transmission arm 48, and are also beneficial for maintaining the balance of rotation of the two planetary gears during revolution and rotation, thereby avoiding the concentration of the torque on one side of the transmission arm 48. The transmission arm 48 is twisted.

With the above design, the reduction transmission unit 4 is driven in a planetary gear type, so that the output shaft 41 is coaxial with the rotor body 31, and thus has better dynamic balance characteristics.

As described above, by integrating the reduction transmission unit 4 and the AC motor 100 into one body, that is, the reduction transmission unit 4 is directly built in the casing 5 to be decelerated as the power output of the AC motor 100. The mechanism will reduce the arrangement of the conventional coupling, the reducer frame, and the locking zero fastener, so that the overall structure of the AC motor 100 is more compact, lightweight, and easy to repair, and the communication is greatly reduced. The axial installation space of the motor 100. Furthermore, The power transmission path of the rotor unit 3 to the output shaft 41 is shortened to reduce the mechanical energy loss caused by the friction force, thereby further improving the overall performance and contributing to the application in the field of low-speed, high-torque motors.

The present invention has been disclosed in its preferred embodiments, and is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

100‧‧‧AC motor

2‧‧‧stator unit

21‧‧‧stator body

22‧‧‧ Stator salient pole

20‧‧‧ external teeth

3‧‧‧Rotor unit

31‧‧‧Rotor body

35‧‧‧Rotor shaft

4‧‧‧Deceleration drive unit

41‧‧‧ Output shaft

42‧‧‧First transmission gear

43‧‧‧Second transmission gear

44‧‧‧ Output gear

49‧‧‧Drive shaft

5‧‧‧Shell

51‧‧‧ body

52‧‧‧ Cover

53‧‧‧ recess

Claims (8)

An AC motor having a speed reduction mechanism, the interior of the AC motor comprising: a certain subunit comprising: a stator sub-body; a plurality of stator salient poles disposed on one of the inner ring surfaces of the stator body; and a plurality of stator coils The stator coils are respectively wound on the stator salient poles; a rotor unit comprises: a rotor body; a plurality of rotor salient poles formed on an outer annular surface of the rotor body; and an external tooth portion formed on the rotor salient poles An outer end surface; and a plurality of rotor coils respectively wound on the salient poles of the rotor for sensing with the stator coils; and a reduction transmission unit comprising: at least one transmission gear, and the outer teeth of the rotor unit The portion is engaged; and an output shaft is rotated by the transmission gear. The AC motor with a speed reduction mechanism according to claim 1, wherein the reduction transmission unit further comprises: a first transmission gear meshing with a tooth portion of the rotor unit; and a second transmission gear having a small number of teeth And rotating with the first transmission gear; and an output gear meshing with the second transmission gear, and the output gear is combined on the output shaft. An AC motor having a speed reduction mechanism according to claim 1, further comprising a casing for covering the stator unit, the rotor unit and the reduction transmission The unit comprises a body and a cover, the cover is combined with the base, the stator body is disposed on the base, and the output shaft protrudes outside the cover. An AC motor having a speed reduction mechanism according to claim 3, wherein the outer casing further comprises a recess formed on the base body, the stator body being embedded in the recess. An AC motor having a speed reduction mechanism, the interior of the AC motor comprising: a certain subunit, comprising: a stator body; an external tooth portion formed on an outer ring surface of the stator body; and a plurality of stator salient poles disposed on the An inner annular surface of the stator body; and a plurality of stator coils respectively wound on the stator salient poles; a rotor unit comprising: a rotor body; a plurality of rotor salient poles formed outside the rotor body; and a plurality of rotors Coils, respectively wound on the salient poles of the rotor for mutual induction with the stator coils; and a reduction transmission unit comprising: at least one transmission gear meshing with the outer teeth of the stator unit and receiving the rotor body The drive rotates; and an output shaft is rotated by the drive gear. The AC motor with a speed reduction mechanism according to claim 5, wherein the reduction transmission unit further comprises: a transmission arm, one end of which is fixed to the rotor body and is rotated by the rotor body; a first transmission a gear that meshes with a tooth portion of the stator unit; a second transmission gear having a smaller number of teeth than the first transmission gear, wherein the first and second transmission gears are pivotally coaxially assembled on one end of the transmission arm to be synchronized by the transmission arm of the transmission arm Rotating; and an output gear meshing with the second transmission gear and combined on the output shaft. An AC motor having a speed reduction mechanism according to claim 5, further comprising a casing for covering the stator unit, the rotor unit and the reduction transmission unit, the casing comprising a body and a cover body In combination with the cover body, the stator system is fixed on the base body, and the output shaft system protrudes outside the cover body. The AC motor with a speed reduction mechanism according to claim 7, wherein the base body comprises: a combination member; a convex portion formed on the assembly; and a hollow shell member combined in the assembly member The stator unit, the rotor unit and the reduction transmission unit are disposed between the cover body and the stator body, and the stator body is fitted on the convex portion.