CN217427831U - Motor shell of motor and motor using same - Google Patents

Abstract

The utility model relates to a casing of motor and use motor of this casing, the casing includes: the main body bracket comprises four corner main rods extending in parallel along the front-back direction and at least two supporting partition plates distributed at intervals along the front-back direction; a circumferential outer plate welded to the upper, lower, left, and right circumferential outer sides of the main body frame; and the front end plate and the rear end plate are welded and fixed at the front end and the rear end of the main body support in a one-to-one correspondence manner, and the front end plate and the rear end plate are respectively provided with an end cover connecting structure for corresponding fixed assembly of a front end cover and a rear end cover of the motor. The casing adopts the mode processing preparation that main part support, circumference outer panel and front and back end plate welding were assembled, and the bight mobile jib, supporting baffle, circumference outer panel and front and back end plate of the concrete size of convenient design processing according to concrete needs, production cost of manufacture is lower relatively, is convenient for solve the relatively higher problem of drum foundry goods casing overall cost.

Description

Motor shell of motor and motor using same

Technical Field

The utility model relates to the technical field of motors. More specifically, the utility model relates to a casing of motor and use motor of this casing.

Background

At present, the mainstream control mode of the motor is to arrange a frequency converter in a control room and lay a control cable to connect the frequency converter with the motor, so as to realize the control of the motor. The control mode has large occupied space, high control cable cost and easy control signal interference. To this problem, some producers manufacture frequency conversion all-in-one, and its structure is like the frequency conversion all-in-one disclosed in the utility model patent of grant bulletin number CN210273758U, directly is in the same place with the fixed assembly of motor with the converter, realizes integrated installation control. In the frequency conversion all-in-one machine with the frequency converter arranged in an integrated mode, the corresponding motor and the frequency converter are respectively provided with the cooling fans, and independent cooling is achieved.

In practice, both in the case of a conventional electric machine and in the case of a frequency converter, the machine part comprises a housing in which the stator and the rotor are arranged, the housing usually being made of a cylindrical casting, such as an iron or aluminum casting. The casing formed by casting is thick and heavy, the whole casting cost is relatively high, and particularly the casting cost is high for a motor with a specific model. Therefore, in order to reduce the cost of the casing, especially for a specific model of motor, it is an urgent need to develop a new casing with relatively low overall cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a casing of motor to solve the casing overall cost relatively higher technical problem of drum foundry goods among the prior art. The utility model also provides an use the motor of above-mentioned casing.

In order to solve the above problem, the first aspect of the present invention provides the following technical solutions: a housing for an electric machine comprising: the main body support comprises four corner main rods extending in parallel along the front-back direction and at least two supporting partition plates distributed at intervals along the front-back direction, the four corner main rods are correspondingly distributed at four corners of a rectangle, each supporting partition plate is welded with the four corner main rods, and each supporting partition plate is provided with a through hole for fixing and assembling a stator of a motor; a circumferential outer plate welded to the upper, lower, left, and right circumferential outer sides of the main body frame; and the front end plate and the rear end plate are welded and fixed at the front end and the rear end of the main body support in a one-to-one manner, end cover connecting structures are respectively arranged on the front end plate and the rear end plate and used for corresponding to the front end cover and the rear end cover of the motor, and then the front end plate and the rear end cover are respectively provided with a supporting bearing for supporting and assembling a rotor of the motor, and the front end plate and the rear end plate are respectively provided with a through hole for the rotor to pass through.

As a further improvement, the inner circumferential surface of the through hole of each supporting partition plate is welded with a plurality of supporting strips which are arranged in a protruding manner, the supporting strips are distributed along the circumferential direction of the through hole at intervals, and the supporting strips are used for being fixedly supported and assembled with the stator of the motor so as to form a heat dissipation air duct between the supporting partition plates and the stator.

As a further improvement, each supporting strip extends along the front-back direction and is connected with the inner circumferential surface of the through hole of each supporting clapboard in a welding mode.

As a further improvement, the positions of the supporting bars corresponding to the supporting partition plates are respectively provided with a stopping step matched with the corresponding supporting partition plate in a stopping manner in the front-back direction.

As a further improvement, the circumferential outer side plate comprises an upper side plate, a lower side plate, a left side plate and a right side plate which are distributed along the circumferential direction of the main body bracket, the lower side plate is provided with a side mounting plate part protruding in the left side plate and the right side plate in the left-right direction, and the side mounting plate part is provided with a bolt mounting part for realizing the fixed mounting of the motor.

As further improvement, the bottom surfaces of the front end plate and the rear end plate are respectively provided with a lower bulge, the front end and the rear end of the lower side plate are respectively provided with an end clamping groove, and the lower bulge is matched with the end clamping groove in a corresponding clamping manner.

As a further improvement, the end cover connecting structures of the front end plate and the rear end plate are both flange connecting structures, and each flange connecting structure comprises a plurality of flange connecting holes located at the edge of the hole orifice of the through hole.

As further improvement, the casing of motor still include the front end housing with the rear end cap, the front end housing on be equipped with the preceding ventilation hole of via hole intercommunication on the front end plate, the rear end cap on be equipped with the back ventilation hole of via hole intercommunication on the rear end plate, in order to pass through preceding ventilation hole the via hole of front end plate via hole on the rear end plate and back ventilation hole realization is right the axial ventilation heat dissipation of motor.

The utility model discloses the second aspect provides following technical scheme: a motor comprises a shell, wherein a rotor and a stator are installed in the shell, and the shell adopts the shell of the motor in any scheme.

As a further improvement, a frequency converter is fixedly mounted on the upper side of the shell of the motor to form a frequency conversion all-in-one machine.

The beneficial effects are that: the utility model provides an among the motor, the casing adopts main part support, circumference outer panel and front and back end plate welding to assemble the mode processing preparation, and the bight mobile jib, supporting baffle, circumference outer panel and front and back end plate of the concrete size of convenient design and processing according to concrete needs, and the production cost of manufacture is lower relatively, conveniently solves the relatively higher problem of drum foundry goods casing overall cost.

As a technical scheme, the support bars are arranged on the inner peripheral surface of the through hole of the support partition plate in a protruding mode, on the basis that the support bars are used for achieving reliable fixed support of the stator, the support bars are arranged in a protruding mode to form the heat dissipation air duct, and ventilation and heat dissipation performance of the stator is improved conveniently.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are illustrated by way of example and not by way of limitation, and like reference numerals designate like or corresponding parts, in which:

fig. 1 is a schematic structural diagram of an embodiment of the variable frequency all-in-one machine provided by the present invention;

fig. 2 is a schematic structural view of a main body part of the motor in fig. 1;

FIG. 3 is a schematic view of the housing-stator assembly of FIG. 2;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is an enlarged view of FIG. 3 at C;

FIG. 6 is an enlarged view of FIG. 3 at D;

FIG. 7 is a schematic structural diagram of the housing of FIG. 1;

FIG. 8 is a front view of the housing of FIG. 7;

fig. 9 is a sectional view taken along line B-B in fig. 8.

Description of reference numerals:

1. a motor; 2. a frequency converter; 3. a fan; 4. a power shaft; 5. a front end cover; 6. a rear end cap; 7. a deep groove ball bearing; 8. a heat dissipation air duct; 11. an upper side plate; 110. a lower bulge; 12. supporting the partition plate; 13. a corner main rod; 14. a supporting strip; 15. a stator; 16. a rear end plate; 17. a lower side plate; 170. a side mounting plate portion; 18. a rotor; 19. a front end plate; 190. an annular positioning step; 20. and a right side plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it should be understood by those skilled in the art that the embodiments described below are part of the embodiments of the present disclosure, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the existing motor such as a frequency conversion all-in-one machine, a shell is mostly a cylinder casting, the overall processing cost is relatively high, and particularly, the processing cost of the casting is particularly high for the motor with special specification and size. To this, the utility model provides a casing of welding pin-connected panel, its mode that adopts main part support, circumference outer panel, and front and back end plate welding concatenation forms the casing main part to the end cover around flange joint structure assembly is passed through at both ends around the casing, and then forms the casing. The welding and assembling mode enables engineers to manufacture parts such as main body supports, circumferential outer side plates, front and rear end plates and the like with corresponding sizes according to specific needs, and then welding and assembling can be carried out, the mode is flexible, and the welding and assembling mode is suitable for meeting the manufacturing requirements of small-batch production.

Having described the basic principles of the invention, various non-limiting embodiments of the invention are described in detail below. Any number of elements in the drawings are by way of example and not by way of limitation, and any nomenclature is used solely for differentiation and not by way of limitation.

The principles and spirit of the present invention are explained in detail below with reference to a number of representative embodiments of the invention.

The utility model provides an embodiment 1 of frequency conversion all-in-one:

the main structure of the frequency conversion all-in-one machine in the embodiment is as shown in fig. 1 to 9, the frequency conversion all-in-one machine mainly comprises a motor 1 and a frequency converter 2 which are integrally assembled together, and the frequency converter 2 is used for controlling working parameters of the main body of the motor 1, such as rotating speed, power and the like, so as to ensure the normal work of the motor.

As shown in fig. 1 to 2, an axial direction of the motor 1 extends in a front-back direction, the motor 1 has a housing, a stator 15, a rotor 18 and a power shaft 4 are arranged in the housing, the power shaft 4 extends in the front-back direction, the housing has a front end cover 5 and a rear end cover 6, the power shaft 4 is rotatably assembled with the front end cover 5 and the rear end cover 6 through a deep groove ball bearing 7, and a part of the front end of the power shaft 4 which forwards extends out of the front end cover 5 forms a power output shaft. In the case of the electric machine 1, the stator 15 is fixedly arranged in the housing and the rotor 18 is fixedly assembled with the power shaft 4. When the motor 1 is energized, the rotor 18 drives the power shaft to rotate, so that the power output shaft outputs a driving torque.

In this embodiment, the power shaft is rotatably assembled with the front end cover 5 and the rear end cover 6 by the deep groove ball bearing 7, so that the requirement for the rated high rotating speed of the motor can be conveniently met, and a larger radial load can be borne.

In order to control the motor to work conveniently, as shown in fig. 1, a frequency converter 2 is fixedly installed on the upper side of the casing.

For improving the motor performance, the utility model discloses a radiating mode of forced air cooling cools down. Set up fan 3 at motor 1 rear end, this fan 3 is used for blowing forward in order to carry out the cooling operation to motor 1. As shown in fig. 2, a front vent hole is formed in the front end housing 5 of the motor 1, a rear vent hole is formed in the rear end housing 6, the front vent hole and the rear vent hole are both communicated with the inner cavity of the housing, and ventilation channels are respectively formed in the stator 15 and the rotor 18. When the fan 3 blows forward, cooling air enters the inner cavity of the shell through the rear vent hole in the rear end cover 6, is exhausted from the front vent hole in the front end cover 5, takes away heat on the stator 15, the rotor 18 and the power shaft, and achieves air cooling.

In this embodiment, the casing of the motor 1 mainly includes a main body support, a circumferential outer side plate, a front end plate 19, a rear end plate 16, a front end cover 5 and a rear end cover 6 as a whole, wherein the circumferential outer side plate, the front end plate 19 and the rear end plate 16 are all welded and fixed on the main body support, the front end cover 5 is fixedly installed on the front end cover 5, and the rear end cover 6 is fixedly installed on the rear end plate 16.

As shown in fig. 2 to 9, the main body bracket includes four corner main bars 13 and two support spacers 12. Four bight mobile jib 13 extend along the fore-and-aft direction in parallel to correspond the distribution in the rectangle four corners, bight mobile jib 13 specifically can adopt square pipe or round steel, guarantee that the structural strength of main part support can. The two supporting partition plates 12 are rectangular partition plates, and four corners of the two supporting partition plates 12 are welded and fixed with the four corner main rods 13 respectively. In specific implementation, notches are usually formed in four corners of each supporting partition plate 12, the notches are matched with the corner main rods 13, and welding operation is performed along the joint of the notches and the corner main rods 13, so that the supporting partition plates 12 and the four corner main rods 13 can be welded and connected. The four corner main bars 13 and the two support spacers 12 form a main body frame to facilitate the fixed assembly of the circumferential outer side plate, the front end plate 19, and the rear end plate 16.

As shown in fig. 7, the circumferential outer side plates are welded to the circumferential outer sides of the upper, lower, left and right sides of the main body bracket, and each circumferential outer side plate includes an upper side plate 11, a lower side plate 17, a left side plate and a right side plate 20 which are distributed along the circumferential direction of the main body bracket, wherein the joints of the upper side plate 11, the lower side plate 17, the left side plate and the right side plate 20 and the main body bracket are respectively welded to fix the circumferential outer side plates to the circumferential outer sides of the main body bracket.

Moreover, in order to facilitate the fixed mounting of the frequency conversion all-in-one machine on a corresponding mounting base such as a motor bracket, as shown in fig. 7, the lower side plate 17 may have a side mounting plate portion 170 protruding from the left side plate and the right side plate 20 in the left-right direction, and a bolt mounting portion for realizing the fixed mounting of the motor 1 is provided on the side mounting plate portion 170, and the bolt mounting portion is specifically a bolt mounting hole. During assembly, the fastening bolt penetrates through the bolt mounting hole, and the motor 1 can be mounted and fixed.

In addition, in order to improve the connection strength, the bottom surfaces of the front end plate 19 and the rear end plate 16 are respectively provided with a lower protrusion 110, and the front end and the rear end of the lower side plate 17 are respectively provided with an end portion clamping groove, so that the lower protrusion 110 is correspondingly clamped and matched with the end portion clamping groove. In order to further improve the strength of the casing, a welding connection mode is adopted to perform welding operation at the joint of the lower protrusion 110 and the end clamping groove.

In the present embodiment, as shown in fig. 3 to 9, each support partition 12 has a circular through hole for fixedly fitting the stator 15 of the motor 1. In the implementation, the inner circumferential surfaces of the through holes of the two supporting partition plates 12 are welded with the support bars 14 which are arranged in a protruding manner, the plurality of support bars 14 are distributed at intervals along the circumferential direction of the through holes, and the support bars 14 are used for being fixedly supported and assembled with the stator 15 of the motor 1 so as to form the heat dissipation air duct 8 between the supporting partition plates 12 and the stator 15.

In this embodiment, each supporting strip 14 extends in the front-back direction and is welded to the inner circumferential surface of the through hole of each supporting partition 12, so that the connection consistency of the two supporting partitions 12 can be effectively improved, and the improvement of the circulation of each heat dissipation air duct 8 is facilitated.

In order to facilitate the assembly of the supporting bars 14 and the supporting partition plates 12, stopping steps are respectively disposed on the supporting bars 14 at positions corresponding to the supporting partition plates 12, so as to cooperate with the corresponding supporting partition plates 12 in a stopping manner in the front-rear direction. In addition, in order to facilitate the positioning of the support bars 14 in the circumferential direction, the support partition 12 is provided with clamping grooves which are uniformly distributed at intervals in the circumferential direction of the through hole, the clamping grooves extend in the front-back direction, and the front end and the rear end of each clamping groove are both of an open structure, so that the support bars 14 are conveniently clamped and matched with the clamping grooves. After the support bars 14 are assembled on the support partition 12 in a clamping manner, the support bars 14 and the support partition 12 are fixedly assembled together in a welding connection manner.

As shown in fig. 3 to 6, when the stator 15 and the housing are fixedly assembled, the stator 15 is tightly fitted into the housing and is assembled with the support bars 14, so as to fixedly assemble the stator 15 and the housing. During specific assembly, usable expend with heat and contract with cold's principle assembles, heats casing itself, cools down stator 15, then inserts stator 15 in the casing, and standby shell cooling and stator 15 heat up the back, can realize stator 15 and 14 fixed Assembly of supporting bar tight fit ground.

After the stator 15 is fixedly assembled in the through hole of the supporting partition plate 12, the supporting bars 14 arranged at intervals and the stator 15 can cooperate to form a heat dissipation air duct outside the stator 15, thereby facilitating the realization of ventilation and heat dissipation of the stator 15.

In this embodiment, as shown in fig. 4, the front end plate 19 and the rear end plate 16 of the casing are welded and fixed at the front end and the rear end of the main body bracket, which not only improves the structural strength of the whole main body bracket, but also facilitates the installation of the front end cover 5 and the rear end cover 6. Through holes are respectively formed in the front end plate 19 and the rear end plate 16, and are used for the rotor 18 to pass through and cooling air to pass through so as to ensure air-cooling heat dissipation of the inner cavity of the casing.

In addition, flange connection structures are provided on the front end plate 19 and the rear end plate 16, respectively, as end cover connection structures for fixedly assembling the front end cover 5 and the rear end cover 6, respectively. The front end plate 19 is provided with the front end cover 5 in a manner substantially identical to the manner of mounting the rear end cover 6 on the rear end plate 16, as shown in fig. 7, and as described by way of example with respect to the front end plate 19, the front end plate 19 is provided with a flange connection structure so as to facilitate assembly of the front end plate 19 and the front end cover 5 in a flange connection manner as shown in fig. 2. A plurality of flange connecting holes are distributed at the edge of the orifice of the through hole of the front end plate 19 at intervals along the circumferential direction, and an annular positioning step 190 is arranged at the edge of the orifice of the through hole of the front end plate 19. Finally, the front end cover 5 and the front end plate 19 are tightly assembled together by using fastening bolts. The fastening and assembling mode of the rear end plate and the rear end cover is the same as that of the front end plate and the front end cover, and detailed description is omitted here.

As shown in fig. 2, bearing seats are respectively arranged at the middle positions of the front end cover 5 and the rear end cover 6 to assemble supporting bearings, and the supporting bearings can adopt deep groove ball bearings 7 to meet high-speed rotation. The rotor 18 of the motor 1 is support-assembled with a support bearing to assemble the rotor 18 in the casing.

In this embodiment, in order to ensure the front and rear axial ventilation and heat dissipation performance of the motor 1, a front ventilation hole is formed in the front end cover 5, a rear ventilation hole is formed in the rear end cover 6, the front ventilation hole is communicated with the inner cavity of the housing through a via hole in the front end plate 19, and the rear ventilation hole is communicated with the inner cavity of the housing through a via hole in the rear end plate 16. When the cooling fan is used, the axial flow fan 3 at the rear end of the motor 1 blows cooling air to the rear end cover 6, the cooling air enters the inner cavity of the shell from back to front through the rear vent holes and the through holes in the plate of the rear end cover 6, the heat of the stator 15 and the rotor 18 is taken away when the cooling air flows through the stator 15 and the rotor 18, and the cooling air is exhausted to the outside atmosphere through the through holes in the front end plate 19 and the front vent holes, so that the axial ventilation and heat dissipation of the motor 1 are realized.

In addition, to improve the ventilation and heat dissipation effect of the rotor, a ventilation and heat dissipation channel is usually disposed on the rotor 18 of the motor 1 to achieve rapid heat dissipation of the rotor when cooling air flows along the front-rear axial direction.

In the frequency conversion all-in-one that this embodiment provided, the circumference outer panel, front end plate and the back end plate of the casing of motor adopt the sheet metal more, and the frame that the collocation main part support formed has formed the structure of frame + sheet metal welding equipment, and overall structure is stable, with low costs, heat dispersion is good, and the quality is light, the processing preparation of being convenient for.

The utility model provides an embodiment 2 of frequency conversion all-in-one:

the difference from example 1 is mainly that:

in embodiment 1, two support partitions are disposed in the main body frame of the cabinet in the front-rear direction.

In this embodiment, more than three supporting partitions may be disposed in the main body bracket of the casing in the front-rear direction, and the number of the supporting partitions is related to the axial length of the motor. If the axial length of the motor is large, a large number of supporting partition plates can be arranged to ensure the overall strength of the casing.

The utility model provides an embodiment 3 of frequency conversion all-in-one:

the difference from example 1 is mainly that:

in embodiment 1, the end cover connection structure on front end plate and the back end plate is flange connection structure, conveniently detachably with front end cover and back end cover correspondence install on corresponding end plate, convenient removable change end plate.

In this embodiment, the end cover connection structure is a welded connection structure, and the front end cover and the rear end cover are directly welded and fixed to the front end plate and the rear end plate in a one-to-one correspondence manner.

The utility model provides an embodiment 4 of frequency conversion all-in-one:

the difference from example 1 is mainly that:

in embodiment 1, the bottom surfaces of the front end plate and the rear end plate are respectively provided with a lower protrusion, so as to be conveniently matched with the front end and the rear end of the lower side plate in a corresponding clamping manner.

In this embodiment, the bottom surfaces of the front end plate and the rear end plate can be arranged in a flush manner, and the front end plate and the rear end plate can be welded and assembled with the lower side plate.

The utility model provides an embodiment 5 of frequency conversion all-in-one:

the difference from example 1 is mainly that:

in embodiment 1, a support strip is provided on the inner circumferential surface of the through hole of each support partition, and the support strip is correspondingly clamped in the clamping groove provided on the support partition, so as to use the support strip to realize the fixed support of the motor stator, and form a heat dissipation air duct between the support partition and the stator.

In this embodiment, save the draw-in groove that sets up on the fenestrate inner peripheral surface of support baffle, but process the prefabricated indentation on the support baffle to sign department welded connection position conveniently realizes the interval location assembly of support bar on the perforation circumference of support baffle.

The utility model provides an embodiment 6 of frequency conversion all-in-one:

the difference from example 1 is mainly that:

in example 1, each support bar was welded to each support spacer in the front-rear direction.

In this embodiment, at least a part of the support bars may be welded to only a part of the support partitions, for example, when more than four support partitions are provided, some support bars may be welded to only two of the support partitions, and other support bars may be welded to only two of the other support partitions, so that the strength requirement for the support bars may be reduced, the welding difficulty may also be effectively reduced, and the processing cost may be reduced.

The utility model provides an embodiment 7 of frequency conversion all-in-one:

the difference from example 1 is mainly that:

in embodiment 1, circumference outer panel includes epipleural, downside, left side board and right side board, and the whole cuboid structure that forms when the welding is assembled, epipleural, downside, left side board and right side board all with bight mobile jib and support baffle welded connection to realize the welded connection of circumference outer panel and main part support.

In this embodiment, can design into circular or oval with the support baffle, support baffle and four bight mobile jib fixed mounting in order to guarantee the structural strength of main part support, correspondingly, design into the arc structure with the main part of circumference outer panel to laminate mutually with the partial outer peripheral face of support baffle, conveniently realize welded connection.

The aforesaid does the utility model provides a frequency conversion all-in-one's embodiment all sets up the converter at the casing upside of motor to form frequency conversion all-in-one. The utility model discloses still provide the motor of not configurating the converter, in other words, do not set up the converter on motor housing, but be connected the frequency conversion equipment that the distal end set up with the motor through external circuit, and then realize the remote control to the motor.

The utility model also provides a casing of motor, the embodiment of this casing is the same with the structure of casing in casing, the frequency conversion all-in-one machine embodiment in the above-mentioned motor embodiment, specifically no longer gives unnecessary details here.

In light of the above description of the present specification, those skilled in the art will also understand that terms used herein, such as "upper," "lower," "front," "rear," "inner," "outer," "axial," "radial," "circumferential," and the like, refer to orientations and positional relationships that are illustrated in the drawings of the present specification, which are used for convenience in describing aspects of the present invention and for simplicity in description, and are not intended to explicitly state or imply that the referenced devices or elements must be in the particular orientations described, be constructed in the particular orientations, and be operated, and therefore, the above orientation or positional relationship terms should not be interpreted or construed as limiting the aspects of the present invention.

In addition, in the description of the present specification, "a plurality" means at least two, for example, two, three or more, and the like, unless explicitly specifically defined otherwise.

While various embodiments of the present invention have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in practicing the invention. The following claims are intended to define the scope of the invention and, accordingly, to cover module compositions, equivalents, or alternatives falling within the scope of the claims.

Claims (10)

1. A machine housing for an electric machine, comprising:

the main body support comprises four corner main rods extending in parallel along the front-back direction and at least two supporting partition plates distributed at intervals along the front-back direction, the four corner main rods are correspondingly distributed at four corners of a rectangle, each supporting partition plate is welded with the four corner main rods, and each supporting partition plate is provided with a through hole for fixedly assembling a stator of a motor;

a circumferential outer plate welded to the upper, lower, left, and right circumferential outer sides of the main body frame; and

front end plate and back end plate, welded fastening one-to-one is in both ends around the main part support, be equipped with end cover connection structure on front end plate and the back end plate respectively for correspond fixed assembly the front end housing and the back end housing of motor, and then pass through the support bearing that is equipped with on front end housing and the back end housing supports the assembly the rotor of motor, be equipped with the confession on front end plate and the back end plate respectively the via hole that the rotor passed.

2. The casing of the motor as claimed in claim 1, wherein the perforated inner circumferential surface of each support partition is welded with a plurality of support bars arranged in a protruding manner, the support bars are distributed at intervals along the circumferential direction of the perforated inner circumferential surface, and the support bars are used for being fixedly supported and assembled with the stator of the motor to form a heat dissipation air duct between the support partition and the stator.

3. The motor casing of claim 2, wherein each of the supporting bars extends in a front-rear direction and is welded to an inner circumferential surface of the through hole of each of the supporting partitions.

4. The casing of claim 3, wherein each of the support bars is provided with a stop step corresponding to each of the support partitions at a position thereof, and the stop step is engaged with the corresponding support partition in a front-to-rear direction.

5. The machine case according to any one of claims 1 to 4, wherein the circumferential outer side plate comprises an upper side plate, a lower side plate, a left side plate and a right side plate distributed circumferentially along the main body bracket, the lower side plate has a side mounting plate portion protruding in the left-right direction and arranged on the left side plate and the right side plate, and the side mounting plate portion is provided with a bolt mounting portion for realizing fixed mounting of the motor.

6. The motor casing of claim 5, wherein the bottom surfaces of the front end plate and the rear end plate are respectively provided with a lower protrusion, the front end and the rear end of the lower side plate are respectively provided with an end clamping groove, and the lower protrusion is correspondingly clamped and matched with the end clamping groove.

7. The machine case of an electric machine according to any one of claims 1 to 5, wherein the end cover connection structures of the front end plate and the rear end plate are each a flange connection structure, and the flange connection structure includes a plurality of flange connection holes at an orifice edge of the via hole.

8. The motor casing of claim 7, wherein the motor casing further comprises a front cover and a rear cover, the front cover is provided with a front vent hole communicated with the via hole on the front end plate, and the rear cover is provided with a rear vent hole communicated with the via hole on the rear end plate, so as to realize axial ventilation and heat dissipation of the motor through the front vent hole, the via hole on the front end plate, the via hole on the rear end plate and the rear vent hole.

9. An electric machine comprising a housing in which a rotor and a stator are mounted, characterized in that the housing is the housing of the electric machine of any one of claims 1 to 8.

10. The motor as claimed in claim 9, wherein a frequency converter is fixedly mounted on the upper side of the motor casing to form a frequency conversion integrated machine.

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