CN218678758U - Device for dismounting rotor of electric machine - Google Patents

Abstract

The utility model relates to a device (100) for dismantling rotor (20) of motor (10), include: the motor comprises a bracket (1), an actuating assembly (2) and a rotor positioning piece (3), wherein the actuating assembly (2) is arranged on a first side of a mounting surface (11) and comprises a push rod (21), and the push rod (21) movably penetrates through a dismounting hole (12) along a first direction (A) perpendicular to the mounting surface (11) to push a rotor (20) of a motor (10); the rotor positioning element (3) is arranged on a second side of the mounting surface (11) and is movable in a first direction (A) relative to the bracket (1), the rotor positioning element (3) comprises an engagement portion (31) which is engageable with an end of the rotor (20), the engagement portion (31) being coaxial with the push rod (21) such that the rotor (20) and the stator are kept coaxial during disassembly of the rotor (20).

Description

Device for dismounting rotor of electric machine

Technical Field

The utility model relates to a device for dismantling rotor of motor.

Background

A typical electric machine includes a rotor, which may be integral with a drive shaft and/or a driven shaft, and a stator, which may be part of a rotating electrical machine in the form of an alternator, an electric motor or a reversible electric machine that is capable of operating in two modes.

In the motor test development process of the new energy automobile, the stator and the rotor of the motor are separated, in other words, the rotor is detached, which is a frequently encountered work content. No matter in the post-test inspection, the test problem investigation or the quality inspection of the installation of the prototype, the disassembly of the prototype is an essential step.

When the motor is disassembled, the stator and the rotor are necessarily required to be disassembled, an air gap exists between the stator and the rotor under normal conditions, so that the rotor can rotate freely under the action of magnetic force, when the motor is disassembled, for example, a permanent magnet synchronous motor, magnetic force exists between the stator and the rotor, and the stator and the rotor are assembled through a bearing with required fixing force, so that the motor is difficult to disassemble only by hand and must be disassembled by means of external force.

In addition, in the process of disassembly, the air gap is small, and the magnetic force between the stator and the rotor is added, so that the stator and the rotor are easy to generate uneven attraction force in the process of disassembly, and if the operation is improper, if the rotor shakes in the stator, the outer wall of the rotor and the stator coil can be damaged, and the quality of the motor is finally influenced.

Therefore, a special device for disassembling the rotor of the motor is needed, which can easily realize the separation of the stator and the rotor without damaging the stator and the rotor, and improve the disassembly efficiency.

SUMMERY OF THE UTILITY MODEL

To the problem and the demand mentioned above, the utility model provides a novel a device for dismantling rotor of motor, it has solved above-mentioned problem owing to adopted following technical characteristic to bring other technological effects.

The utility model provides a device for dismantling rotor of motor, include: a bracket including a mounting surface configured to secure the motor, the mounting surface including a removal hole therethrough; an actuating assembly disposed on a first side of the mounting surface and including a push rod movably passing through the disassembly hole in a first direction perpendicular to the mounting surface to push a rotor of the motor to separate the rotor from a stator of the motor; and the rotor positioning part is arranged on a second side, opposite to the first side, of the mounting surface and can move along a first direction relative to the bracket, the rotor positioning part comprises a matching part capable of being matched with the first end part of the rotor, and the matching part is coaxial with the push rod, so that the rotor and the stator are kept coaxial in the rotor disassembly process.

According to the above feature, the motor can be fixed to the mounting surface of the bracket, and the detachment of the rotor is actuated by the actuating assembly and the rotor positioning member and the rotor and the stator are ensured to be coaxial during the detachment. The first direction can be for example along the axis direction of rotor, consequently actuating the rotor in order to follow the in-process of stator dismantlement, the action direction of actuating the subassembly and the direction of motion of rotor positioning piece all along the axis direction to the cooperation portion of rotor positioning piece and the first end cooperation of rotor, with the stator is coaxial with the rotor in keeping dismantling the in-process, thereby guarantees that rotor atress is balanced in dismantling the in-process, prevents to appear colliding with the fish tail between stator and the rotor.

In some examples, the mating portion extends in a second direction opposite the first direction, and the mating portion includes an opening toward the mounting surface to receive the first end of the rotor therein.

According to the above feature, the fitting portion extends toward the second direction and has the opening that receives the first end portion of the rotor, and reliable fitting and connection can be achieved. The size and the depth of the opening can be adapted according to the size of the rotor, so that the motor is suitable for motors with different sizes and specifications.

In some examples, the opening is clearance fit with the first end of the rotor.

In some examples, the actuation assembly further includes a sleeve fixedly disposed at one end of the push rod and coaxial therewith, and configured to mate with a second end of the rotor opposite the first end.

According to above characteristic, two relative tip of rotor, first end and second end promptly, respectively with the opening and the sleeve cooperation of cooperation portion to all with the coaxial setting of push rod with the both ends of rotor, guarantee that the rotor keeps moving along the axis direction at the dismantlement in-process, prevent to collide with the stator.

In some examples, the rotor positioning member has a polygonal shape, and the mating portion is located at one vertex of the polygonal shape.

The rotor positioning part is arranged in a polygon shape, and the matching part is positioned at one vertex, so that the integral rigidity of the rotor positioning part is improved, and the stability and the reliability of the device are improved.

In some examples, the apparatus further includes a connection plate, wherein the bracket further includes a support plate perpendicular to the mounting surface, the support plate is provided with a guide rail arranged in a first direction, and the rotor positioning member is fixedly connected with the slider through the connection plate such that the rotor positioning member is movable in the first direction through the slider and the guide rail.

The device is movably connected with the rotor positioning piece and the slide block guide rail structure through the connecting plate, the degree of freedom of the movement of the rotor positioning piece in the first direction is provided, and meanwhile the reliable and stable movement of the rotor positioning piece in the first direction is ensured.

In some examples, a first L-shaped support is disposed between the support plate and the mounting surface, and a second L-shaped support is disposed between the connection plate and the rotor positioning member.

In some examples, the stand further includes a plurality of legs extending from the first side in a direction opposite the first direction, a plurality of reinforcement plates disposed between the plurality of legs, wherein the actuation assembly is fixedly connected to at least two of the plurality of reinforcement plates.

According to the above features, the support of the device may be supported by a plurality of legs, the height of which may be adjusted to suit the working height of the operator. The stiffening plate disposed between the legs may enhance the stability and strength of the device.

In some examples, the mounting surface further includes a motor fixing portion disposed around the detachment hole.

In some examples, the motor fixing part includes a plurality of mounting holes having different distances from a center of the detachment hole.

According to the above features, the device of the present disclosure can be adapted to a plurality of different sized motors, which can be fixed in a part of the plurality of mounting holes, so that the applicable range of the device is wider.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

Fig. 1 illustrates a front view of an apparatus according to at least one embodiment of the present disclosure;

FIG. 2 illustrates another front view of an apparatus according to at least one embodiment of the present disclosure;

FIG. 3 illustrates a perspective view of a device according to at least one embodiment of the present disclosure;

FIG. 4 shows a top view of the apparatus of the embodiment shown in FIG. 3;

FIG. 5 illustrates a perspective view of a rotor positioning member in accordance with at least one embodiment of the present disclosure;

fig. 6 illustrates a schematic diagram of an electric machine in accordance with at least one embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the technical solutions of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present disclosure. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims of the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

A typical electric machine includes a stator and a rotor that rotates relative to the stator, which may be integral with a drive shaft and/or a driven shaft, and which may be part of a rotating electrical machine in the form of an alternator, an electric motor or a reversible electrical machine that is capable of operating in two modes. The stator and the rotor are assembled through the bearing with required fixing force, so that the fit is very tight, and large acting force is required for separating the stator and the rotor. In addition, since there is an electromagnetic force between the stator and the rotor, a resultant force of the two forces must be overcome to separate the rotor from the stator.

It should be noted that, the present disclosure refers to disassembling the rotor of the motor, and mainly refers to disassembling the rotor from the stator, which is a common step in the motor test development process.

At present, most of stator and rotor separation modes adopt a hydraulic driving structure for extrusion and a mode of beating and dragging by manpower, and the mode is simple and violent in operation and has high requirements on physical strength and operation experience of an operator; more serious is the susceptibility to damage to the stator and rotor surfaces of the machine. In the disassembling process, due to the action of electromagnetic force, the stress balance can not be realized when an operator manually operates, and the stator and the rotor are inevitably scratched. This results in that the performance and reliability of the disassembled and reassembled motor often cannot reach the original state. Therefore, a special device for disassembling the rotor of the motor is needed, which can easily realize the separation of the stator and the rotor without damaging the stator and the rotor, and improve the disassembly efficiency.

It should be noted that in the description of the present disclosure, the first direction refers to the axial direction of the rotor and/or the stator, and the rotor will be separated from the stator in the first direction during the disassembly process.

Various embodiments according to the present disclosure will be described in detail below with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are given to the constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted.

Possible embodiments within the scope of the disclosure may have fewer components, have other components not shown in the figures, different components, differently arranged components or differently connected components, etc. than the embodiments shown in the figures. Further, two or more of the components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components, without departing from the concepts of the present disclosure.

As shown in fig. 3, the apparatus 100 for disassembling the rotor 20 of the motor 10 according to at least one embodiment of the present disclosure includes: bracket 1, actuating assembly 2, rotor positioning member 3, connecting plate 4 and guide rail 5.

The support 1 constitutes the supporting structure of the device 100 for supporting the actuating assembly 2, the rotor positioning element 3 and the motor 10. The bracket 1 includes a mounting surface 11 configured to secure the motor 10. As shown in fig. 3, the rotor positioning element 3 is arranged on the upper side of the mounting surface 11, the frame 1 further comprises a support plate 14 perpendicular to the mounting surface 11, the support plate 14 is provided with a guide rail 5 arranged along the first direction a, the rotor positioning element 3 is fixedly connected with the slide block 6 by a connecting plate 4, for example, by a screw connection, so that the rotor positioning element 3 is movable along the first direction a by the slide block 6 and the guide rail 5. The guide rail 5 is fixed to the support plate 14 by screws. The slide 6 is slidably fitted to the guide rail 5, and the connecting plate 4 is also fixed to the slide 6 by screws, so that the rotor positioning member 3 and the connecting plate 4 can move linearly in a first direction a or a second direction B opposite to the first direction a. In fig. 3, the connecting plate 4 is located at the upper portion of the guide rail 5 for convenience of illustration, but in actual use, due to the self-weight of the connecting plate 4 and the rotor positioning member 3, they are naturally located at the lower portion of the guide rail 5 when the motor 10 is not mounted.

The length and the installation position of the guide rail 5 may be determined according to an initial position, a movement stroke, etc. required for detaching the rotor 20, whereas the initial position and the movement stroke may be directly adjusted by adjusting the length and the installation position of the guide rail 5.

In order to enhance the connection strength between the two mutually perpendicular components of the support plate 14 and the mounting surface 11, a first L-shaped support 71 may be provided between the support plate 14 and the mounting surface 11. Similarly, a second L-shaped support 72 may be provided between other mutually perpendicular components, such as the connecting plate 4 and the rotor positioning member 3.

On the underside of the mounting surface 11, the stand 1 further comprises a plurality of legs 8, for example four legs 8 as shown in fig. 3. Four legs 8 extend downwardly from the underside of the mounting surface 11 to support the entire apparatus 100 on the ground (not shown). From this point on, the device 100 is substantially in the shape of a table or chair, and the height of the mounting surface 11 can be selectively set to a height suitable for the operator, for example between 70cm and 150 cm.

In order to reinforce the strength of the connection between the legs 8, a plurality of reinforcing plates 9,9' may be provided between adjacent legs 8. As shown in fig. 3, four reinforcing plates 9 are provided at the bottom of the legs 8, respectively connecting two adjacent legs 8. Furthermore, in the middle of the leg 8, two additional stiffening webs 9 'may be provided, to which two stiffening webs 9' the actuating assembly 2 may be fixedly connected, thus providing a mounting location for the actuating assembly 2.

Alternatively, the first L-shaped support 71, the second L-shaped support 72 and the reinforcing plates 9,9' may be made of stainless steel to ensure the stability of the device 100.

The actuating assembly 2 may be an actuator assembly capable of linear actuation, such as a linear drive, hydraulic assembly, etc., including a push rod 21 as the output member for linear motion. As mentioned above, the actuating assembly 2 is fixed to the bracket 1 by the reinforcement plate 9'.

Alternatively, as best shown in fig. 4, the mounting surface 11 may include a through-hole 12 and a motor fixing portion 13 disposed around the through-hole 12. The diameter of the disassembly hole 12 is larger than the diameter of the end of the push rod 21 and smaller than the sectional size of the motor. The motor fixing portion 13 may include, for example, a plurality of mounting holes 15 having different distances from the center (circle center) of the dismounting hole 12, and the mounting holes 15 may be correspondingly arranged according to motors of different sizes, specifications, and models, thereby allowing the rotor of various motors to be adapted for dismounting.

During disassembly, the push rod 21 is movably passed through the disassembly hole 12 in the first direction a to push the rotor 20 of the motor 10, thereby separating the rotor 20 from the stator (not shown).

The motor 10 and a stator (not shown) fixedly coupled to the motor 10 are fixedly mounted on the mounting surface 11, and thus the push rod 21 pushes the rotor 20 in the first direction a, so that the rotor 20 is separated from the stator, thereby detaching the rotor 20 from the motor 10. Since the rotor 20 is typically a tight fit with the bearings, the rotor 20 may be removed from the motor 10 along with the bearings during the removal process.

To ensure that the rotor 20 remains coaxial with the stator at all times during disassembly, the present disclosure positions both ends of the rotor 20 separately. Compare in direct one end dismantlement from rotor 20, the mode of the both ends location that this disclosure provided can guarantee better the axiality of dismantlement in-process, prevents only from one end dismantlement and cause another free end to take place to collide with the stator under the effect of magnetic force.

As shown in fig. 6, the rotor 20 of the motor 10 includes opposite first and second end portions 201 and 202. Wherein the second end 202 is configured to be pushed by the push rod 21. The device 100 coaxially positions the first end 201 and the second end 202 by means of the rotor positioning element 3 and the push rod 21, respectively.

As shown in fig. 5, the rotor positioning member 3 includes an engaging portion 31 capable of engaging with the first end portion 201 of the rotor 20. The fitting portion 31 is coaxial with the push rod 21.

The fitting portion 31 extends in the second direction B and has an opening 32 opened at a lower portion, and after being mounted to the bracket 1, the opening 32 of the fitting portion 31 faces the mounting surface 11, and thus also the rotor 20 of the motor 10, to receive the first end portion 201 of the rotor 20 in the opening 32.

In this embodiment, the rotor positioning element 3 is triangular, specifically, an isosceles triangle, and the matching portion 31 is located at the vertex where two isosceles sides of the isosceles triangle intersect, so that the triangular stable support can be realized.

For the second end 202, the actuating assembly 2 may further comprise a sleeve 22, the sleeve 22 being fixedly arranged at the upper end of the push rod 21 and coaxial with the push rod 21. The sleeve 22 is configured to mate with the second end 202 of the rotor 20. The first end 201 and the second end 202 may illustratively be rotor shafts with a rotor body between the first end 201 and the second end 202.

To prevent over-fitting, the sleeve 22 may be a tight fit with the second end 202. Accordingly, the opening 32 is in clearance fit with the first end portion 201, so as to allow proper assembly play, and finally, the push rod 21 (including the sleeve 22), the first end portion 201, the second end portion 202, the stator (not shown) and the rotor positioning member 3 (including the fitting portion 31) are coaxial, so as to ensure that the rotor 20 and the stator are always coaxial during the disassembly process.

Alternatively, the sleeve 22 may also be fitted with bearings that are a tight fit with the rotor 20.

Fig. 1 and 2 exemplarily depict a disassembly process of the rotor 20.

As shown in fig. 1, the push rod 21 and the fitting portion 31 of the rotor positioning member 3 are first adjusted to be coaxial, the motor 10 to be disassembled is then fixed to the mounting surface 11 through the mounting hole 15, the first end portion 201 of the rotor 20 of the motor 10 is received in the opening 32 of the fitting portion 31 and is in clearance fit with each other, and the second end portion 202 is in tight fit with the sleeve 22 of the push rod 21, so that the motor 10 to be disassembled is mounted in place.

The actuating assembly 2 is then activated to actuate the push rod 21 to move linearly in the first direction a, and since the motor 10 is already fixed, the rotor 20 is driven by the push rod 21 to separate from the stator of the motor 10 in the first direction a until the rotor 20 is completely pushed out and separated from the stator, as shown in fig. 2. During the disassembly process, the rotor 20 is always kept coaxial with the stator under the action of the rotor positioning piece 3 and the push rod 21, so that the disassembly of the rotor 20 is finally completed.

To sum up, the utility model provides a device for dismantling rotor of motor adopts actuating assembly and coaxial positioning setting, can easily realize the separation of stator and rotor and do not damage stator and rotor, improves and dismantles efficiency. The device has simple and reliable structure and cost effectiveness. In addition, the device is also suitable for motors with different sizes and has higher use flexibility.

Exemplary embodiments of the device for dismounting a rotor of an electrical machine proposed by the present disclosure have been described above in detail with reference to preferred embodiments, however, it will be understood by those skilled in the art that numerous variations and modifications may be made to the specific embodiments described above without departing from the concept of the present disclosure. In addition, various combinations of the various features and structures presented in the various aspects of the disclosure may be made without departing from the scope of the disclosure, which is defined in the appended claims.

Claims (10)

1. A device (100) for dismounting a rotor (20) of an electric machine (10), characterized in that it comprises:

-a bracket (1) comprising a mounting surface (11) configured to fix the motor (10), the mounting surface (11) comprising a through-going dismounting hole (12);

an actuating assembly (2) disposed on a first side of the mounting surface (11) and comprising a push rod (21), the push rod (21) being movably passed through the dismounting hole (12) in a first direction (A) perpendicular to the mounting surface (11) to push a rotor (20) of the motor (10) to disengage the rotor (20) from a stator of the motor (10); and

a rotor positioning element (3) arranged on a second side of the mounting surface (11) opposite to the first side and movable in a first direction (A) relative to the bracket (1), the rotor positioning element (3) comprising an engagement portion (31) engageable with a first end portion (201) of the rotor (20), the engagement portion (31) being coaxial with the push rod (21) such that the rotor (20) and the stator are kept coaxial during disassembly of the rotor (20).

2. The device (100) according to claim 1, wherein the engagement portion (31) extends in a second direction (B) opposite to the first direction (a) and comprises an opening (32) facing the mounting surface (11) to receive the first end (201) of the rotor (20) in the opening (32).

3. The device (100) of claim 2, wherein the opening (32) is clearance fit with the first end (201) of the rotor (20).

4. The device (100) according to any one of claims 1 to 3, wherein the actuation assembly (2) further comprises a sleeve (22), the sleeve (22) being fixedly arranged at one end of the push rod (21) and coaxial to the push rod (21), and the sleeve (22) being configured to cooperate with a second end (202) of the rotor (20) opposite to the first end (201).

5. The device (100) according to any one of claims 1 to 3, wherein the rotor positioning element (3) has a polygonal shape and the engagement portion (31) is located at one vertex of the polygonal shape.

6. Device (100) according to claim 5, wherein the device (100) further comprises a connecting plate (4), wherein the stand (1) further comprises a support plate (14) perpendicular to the mounting surface (11), wherein the support plate (14) is provided with a guide rail (5) arranged in the first direction (A), wherein the rotor positioning element (3) is fixedly connected with the slider (6) by the connecting plate (4) such that the rotor positioning element (3) is movable in the first direction (A) by the slider (6) and the guide rail (5).

7. Device (100) according to claim 6, characterised in that a first L-shaped support (71) is arranged between the support plate (14) and the mounting surface (11), and a second L-shaped support (72) is arranged between the connection plate (4) and the rotor positioning element (3).

8. The device (100) according to claim 1, wherein the stand (1) further comprises a plurality of legs (8), the plurality of legs (8) extending from the first side in a second direction (B) opposite to the first direction (a), the plurality of legs (8) having a plurality of stiffening plates (9, 9 ') disposed therebetween, wherein the actuation assembly (2) is fixedly connected to at least two stiffening plates (9 ') of the plurality of stiffening plates (9, 9 ').

9. The device (100) according to claim 1, wherein the mounting surface (11) further comprises a motor fixing portion (13) arranged around the dismounting hole (12).

10. The device (100) according to claim 9, wherein the motor fixing portion (13) comprises a plurality of mounting holes (15) at different distances from the center of the dismounting hole (12).

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