CN212726658U

CN212726658U - Electric motor

Info

Publication number: CN212726658U
Application number: CN202021953894.3U
Authority: CN
Inventors: 唐杰; 易四明; 付强; 彭小明
Original assignee: Shenzhen Fengfa Science And Technology Development Co ltd; Shandong Wind Amperex Technology Ltd
Current assignee: Shenzhen Fengfa Science And Technology Development Co ltd; Shandong Wind Amperex Technology Ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-03-16
Anticipated expiration: 2030-09-08

Abstract

The present disclosure provides a motor, which is a switched reluctance motor applied to a boarding ladder, comprising various components as follows: the outer surface of the shell is smooth. The rear end cover is connected to one end of the shell, and a rear end cover hole is formed in the middle of the rear end cover. The front end cover is connected to the other end of the shell, and the middle part of the front end cover is also provided with a front end cover hole; and the output shaft penetrates through the shell, one end of the output shaft is accommodated in the rear end cover hole and is flush with the rear end cover, and the other end of the output shaft penetrates through the front end cover hole to serve as an output end of the output shaft so as to transmit power to each mechanism on the boarding vehicle. And the rotor assembly is fixed on the output shaft between the front end cover and the rear end cover. And the stator component is fixed on the inner side of the casing, sleeved on the outer side of the rotor component, arranged corresponding to the rotor component and provided with a gap. And the glue filling layer is arranged in a gap between the outer side surface and the inner side surface of the stator assembly. The technical problem that the motor in the prior art is too large in axial length and not easy to mount in a vehicle chassis is solved.

Description

Electric motor

Technical Field

The disclosure relates to the field of boarding cars, in particular to a motor.

Background

At present, most airport flight service equipment (passenger boarding stairs) adopt an oil-fired machine as power output, and due to the improvement of environmental awareness all over the world, more and more airport flight service equipment (passenger boarding stairs) adopt motors as power output. Compared with an oil engine, the motor has the characteristics of simple structure, low cost, high energy conversion efficiency and long service life.

However, the motor adopted by the existing electric boarding vehicle is a traditional three-phase asynchronous motor, and the axial length of the motor is too large, so that the motor is not easy to be installed in a vehicle chassis.

Disclosure of Invention

One purpose of this disclosure is to solve among the prior art motor axial length too big, be difficult for installing the technical problem in the vehicle chassis.

In order to solve the technical problem, the following technical scheme is adopted in the disclosure:

according to one aspect of the present disclosure, there is provided a motor including:

the outer surface of the shell is smooth;

the rear end cover is connected to one end of the shell, and a rear end cover hole is formed in the middle of the rear end cover;

the front end cover is connected to the other end of the shell, and a front end cover hole is formed in the middle of the front end cover;

the output shaft penetrates through the shell, one end of the output shaft is accommodated in the rear end cover hole and is flush with the rear end cover, and the other end of the output shaft penetrates through the front end cover hole and is used as an output end of the output shaft so as to transmit power to each mechanism on the boarding car;

the rotor assembly is fixed on the output shaft between the front end cover and the rear end cover;

the stator component is fixed on the inner side of the shell, sleeved on the outer side of the rotor component, arranged corresponding to the rotor component and provided with a gap;

and the glue filling layer is arranged in a gap between the outer side surface and the inner side surface of the stator assembly.

According to the technical scheme, the method has the advantages that:

in this disclosure, through pouring into the heat dissipation glue in stator module for stator module can derive to the casing fast in the heat that the working process produced, has improved the heat dissipation of motor makes the motor can cancel subassembly such as fan, with the axial length who shortens the motor, has solved among the prior art motor axial length too big, is difficult for putting into vehicle chassis's technical problem.

Drawings

Fig. 1 is a schematic structural diagram of a motor according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural view of a housing of the motor shown in fig. 1.

Fig. 3 is a schematic structural view of a rear end cap of the motor shown in fig. 1.

Fig. 4 is a schematic structural view of a front cover of the motor shown in fig. 1.

Fig. 5 is a schematic structural view of an output shaft of the motor shown in fig. 1.

Fig. 6 is a schematic structural view of a coupling member of the motor shown in fig. 1.

Fig. 7 is a schematic structural view of a rotor assembly of the motor shown in fig. 1.

Fig. 8 is a partial cross-sectional view of a stator assembly of the motor shown in fig. 7.

Fig. 9 is a perspective view of the stator assembly shown in fig. 1.

Fig. 10 is a perspective view of a stator core of the stator assembly shown in fig. 9.

Fig. 11 is a perspective view of a stationary ring of the stator assembly shown in fig. 9.

The motor comprises a machine shell 10, a rear end cover 20, a front end cover 30, an output shaft 40, a bearing 401, a rotor assembly 50, a stator assembly 60, a glue pouring layer 601, a rotary transformer cover 70, a rotary transformer 701, a junction box 80, a wiring board 801 and a connecting piece 90;

notches 11 and reinforcing ribs 12;

a rear end cover hole 21, an annular side wall 22 and a bearing cavity 23;

a front end cover hole 31, an annular side wall 32, a bearing cavity 33;

an output end 41 and a mounting groove 43;

a main body 51, a convex tooth 52, and a mounting key 53;

a stator core 61, a stator coil 62, and a fixing ring 63;

yoke portion 611, tooth pole portion 612, and coil slot 613;

annular portion 631, pillar portion 632, and baffle portion 633.

Detailed Description

While this disclosure may be susceptible to embodiment in different forms, there is shown in the drawings and will herein be described in detail only some specific embodiments thereof with the understanding that the present description is to be considered as an exemplification of the principles of the disclosure and is not intended to limit the disclosure to that as illustrated herein.

Thus, a feature indicated in this specification will serve to explain one of the features of one embodiment of the disclosure, and not to imply that every embodiment of the disclosure must have the stated feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.

In the embodiments shown in the drawings, directional references (such as upper, lower, left, right, front and rear) are used to explain the structure and movement of the various elements of the disclosure not absolutely, but relatively. These descriptions are appropriate when the elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indication of these directions changes accordingly.

Some embodiments of the disclosure are further elaborated below in conjunction with the drawings of the present specification. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The present disclosure provides a motor applied to a passenger boarding car serving an airport as a power output of the passenger boarding car.

Referring to fig. 1, the motor includes a casing 10, a rear cover 20, a front cover 30, an output shaft 40, a bearing 401, a rotor assembly 50, a stator assembly 60, a potting compound 601, a spin-change cover 70, a spin-change device 701, a terminal box 80, and a terminal board 801.

Referring to fig. 2, the housing 10 is a horizontal cylinder, and a base is disposed at the bottom of the housing for supporting the entire motor. The rear end cap 20 and the front end cap 30 are respectively disposed at two ends of the casing 10 and fixedly connected to the casing 10 to close openings at the two ends of the casing. The middle part of the rear end cover 20 is provided with a rear end cover hole 21, and the middle part of the front end cover 30 is also correspondingly provided with a front end cover hole 31. The output shaft 40 is inserted into the housing 10, and one end of the output shaft is received in the rear end cover hole 21 and flush with the outer surface of the rear end cover 20, and the other end of the output shaft passes through the front end cover hole 31 and is an output end 41 of the output shaft 40, so as to transmit power to each mechanism on the boarding vehicle.

The outer surface of the casing 10 is smooth, and the outer surface thereof is further provided with a plurality of reinforcing ribs 12 arranged at intervals.

Referring to fig. 3 and 4, the inner side surfaces of the rear end cover 20 and the front end cover 30 are respectively provided with

annular side walls

22 and 32 extending axially and oppositely, the

annular side walls

22 and 32 are arranged around the output shaft 40, and bearing

cavities

23 and 33 are formed between the annular side walls and the output shaft 40. The

bearing cavities

23 and 33 are used for accommodating the bearings 401 respectively arranged at two ends of the interior of the motor, and the bearings 401 are sleeved on the output shaft 40 and respectively accommodated in the

bearing cavities

23 and 33 for supporting the output shaft 40.

The rotary cover 70 is connected to the rear end cover 20 to cover the rear end cover hole 21, and a rotary cavity 71 communicated with the rear end cover hole 21 is formed in the rotary cover 70. The resolver 701 is accommodated in the resolver cavity 71 and connected to an end of the output shaft 40. The rotating speed of the output shaft 40 is measured, and the working frequency and the power of the motor are controlled according to the rotating speed of the output shaft, so that the motor can automatically switch the working frequency and the power according to different working conditions, and the purpose of saving power consumption is achieved.

Referring to fig. 5 and fig. 6, the connecting member 90 is sleeved on the output end 41 of the output shaft 40, and a side of the connecting member 90 away from the front end cover 30 is directly connected to a transmission shaft of the boarding vehicle. In one embodiment of the present disclosure, the outer surface of the output end 41 of the output shaft 40 is provided with an external spline disposed along the outer circumference, and the inner side surface of the connecting member 90 is correspondingly provided with an internal spline engaged with the external spline. In other words, in the present embodiment, the connecting member 90 and the output shaft 40 are coupled by a spline, so that the stress is uniform, the problem of stress concentration is not generated, a large load can be borne, and meanwhile, the precise positioning of the coupling of the connecting member 90 and the output shaft 40 is facilitated.

For the conventional electric boarding ladder, a three-phase asynchronous motor is generally adopted, and the three-phase asynchronous motor has higher power consumption and lower energy conversion efficiency, so that a large-scale fan needs to be arranged at the end part of one end of the output shaft 40, which penetrates through the rear end cover hole 21, and a circle of heat dissipation ribs are arranged on the outer surface of the shell 10 to achieve the purpose of heat dissipation.

Referring to fig. 7, the rotor assembly 50 is fixed on the output shaft 40 between the front cover 30 and the rear cover 20. The output shaft 40 is provided with an installation groove 43, the rotor assembly 50 is correspondingly provided with an installation key 53, and the installation key 53 is installed in the installation groove 43, so that the rotor assembly 50 is fixed on the output shaft. I.e., rotor assembly 50 and output shaft 40 are coupled using a flat key. The rotor assembly 50 includes a cylindrical main body 51 and a protruding tooth portion 52 provided on an outer surface of the main body 51 and extending in a radial direction of the main body 51. The convex tooth portions 52 are uniformly arranged in the circumferential direction of the main body portion 51 and are provided at intervals.

Referring to fig. 8 to 11, the stator assembly 60 is fixed inside the casing 10, sleeved outside the rotor assembly 50, and disposed corresponding to the rotor assembly 50 with a gap therebetween. The stator assembly 60 includes a stator core 61, a stator coil 62 wound around the stator core 61, and fixing rings 63 provided at both ends of the stator core 61. The stator core 61 includes a yoke portion 611 having a ring shape and a tooth portion 612 extending from an inner surface of the yoke portion 611 in a radial direction of the yoke portion 611, and the tooth portion 612 is provided at intervals in a circumferential direction of the yoke portion 611 to form a plurality of coil slots 613. The stator coil 62 is received in the coil slot 613 and wound around the tooth pole portion 612. The number of the tooth pole portions 612 does not correspond to the number of the convex tooth portions 52, so that when one convex tooth portion 52 faces one tooth pole portion 612, the other convex tooth portion 52 does not face any other tooth pole portion 612, and dead points of the motor in the rotating process are avoided. The stator ring 63 is attached to the stator core 61 and includes an annular portion 631, a winding post portion 632, and a baffle portion 633. The annular portion 631 is annular and is attached to the yoke portion 611. The column portion 632 extends from the inner surface of the annular portion 631 in the radial direction of the annular portion 631, is provided at intervals in the circumferential direction, and is attached to the tooth portion 612, and the radial length of the column portion 632 is smaller than the radial length of the tooth portion 612. The baffle portion 633 is provided at one end of the winding post portion 632 that faces away from the annular portion 631, and is provided with an engagement groove that engages with the tooth pole portion 612, and the stator coil 62 is provided in a space between the baffle portion 633 and the annular portion 631. The stator ring 63 can fix the stator coil 62 in the space between the baffle plate portion 633 and the groove bottom of the coil groove 613, and can block the stator coil 62, thereby preventing the stator coil 62 from being displaced in the tooth pole portion 612 and coming off the tooth pole portion 612, and increasing the stability of the motor operation. The gap between the outer side surface and the inner side surface of the stator assembly 60 is further filled with a glue filling layer 601, and the glue filling layer 601 is used for guiding heat generated inside the motor, particularly heat generated when the stator coil 62 works, out to the casing 10 and dissipating the heat outwards from the casing 10.

The junction box 80 is disposed outside the casing 10, and a gap 11 is disposed in a region of the casing 10 corresponding to the junction box 80, so that a space in the junction box 80 communicates with a space in the casing 10. Terminal block 801 is provided in terminal block 80, and has one end electrically connected to the electric wire in case 10 and the other end electrically connected to an external power supply.

While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. An electric motor, for a switched reluctance motor applied to a boarding car, comprising:

the outer surface of the shell is smooth;

2. The motor of claim 1, further comprising:

the rotary transformer cover is connected to the rear end cover and covers the rear end cover hole, and a rotary transformer cavity communicated with the rear end cover hole is formed in the rotary transformer cover;

and the resolver is accommodated in the resolver cavity and is connected with the end part of the output shaft.

3. The motor of claim 1, further comprising:

and the connecting piece is sleeved on the output end of the output shaft, and one surface of the connecting piece, which deviates from the front end cover, is directly connected with a transmission shaft of the boarding vehicle.

4. The motor of claim 3, wherein the outer surface of the output end of the output shaft is provided with external splines arranged along the circumference, and the inner side surface of the connecting piece is correspondingly provided with internal splines matched with the external splines.

5. The motor of claim 1, wherein the output shaft further defines a mounting slot, and the rotor assembly further defines a mounting key, the mounting key being mounted in the mounting slot to secure the rotor assembly to the output shaft.

6. The motor of claim 1, wherein the stator assembly comprises:

a stator core including a yoke portion having an annular shape and tooth pole portions extending from an inner side surface of the yoke portion in a radial direction of the yoke portion, the tooth pole portions being arranged at intervals in a circumferential direction of the yoke portion to form a plurality of coil slots;

and the stator coil is accommodated in the coil slot and wound on the tooth pole part.

7. The motor of claim 6, wherein the stator assembly further comprises:

the fixing rings are arranged at two ends of the stator core and are attached to the stator core, and each fixing ring comprises an annular part, a winding column part and a baffle part; the annular part is annular and is attached to the magnetic yoke part; the winding column part extends from the inner side surface of the annular part along the radial direction of the annular part, is arranged at intervals along the circumferential direction and is attached to the tooth pole part, and the radial length of the winding column part is smaller than that of the tooth pole part; the baffle portion is arranged at one end, away from the annular portion, of the winding column portion, a clamping groove clamped with the tooth pole portion is formed in the baffle portion, and the stator coil is arranged between the baffle portion and the annular portion.

8. The motor of claim 1, wherein the outer side of the housing further comprises a plurality of spaced ribs.

9. The motor of claim 1, further comprising:

the junction box is arranged on the outer side of the shell, and a gap is formed in the area of the shell corresponding to the junction box so as to enable the space in the junction box to be communicated with the space in the shell;

and the wiring board is arranged in the wiring box, one end of the wiring board is electrically connected with the electric wire in the shell, and the other end of the wiring board is electrically connected with an external power supply.

10. The motor of claim 1, wherein the inner side surfaces of the rear end cover and the front end cover are each provided with an annular side wall extending in the opposite axial direction, the annular side walls are arranged around the output shaft, and a bearing cavity is formed between the annular side walls and the output shaft; the motor also comprises bearings which are respectively arranged at two ends in the motor, and the bearings are sleeved on the output shaft and are contained in the bearing cavities.