KR102690278B1 - Apparatus for assembling of motor - Google Patents

Abstract

An embodiment of the present invention relates to a motor assembly device that can more easily, accurately and safely assemble or disassemble a rotor into a motor housing equipped with a stator. An embodiment of the present invention is a motor assembly device for assembling or disassembling a rotor in a motor housing including a stator, comprising: a main body table having a product input point and an assembly point; a transfer jig unit provided to be movable between the product input point and the assembly point, on which the motor housing is seated; and a rotor fixture that is provided on the main body table so as to be able to be raised and lowered based on the assembly point, and passes through the transfer jig unit and the motor housing when raised to securely support the lower end of the rotation axis of the rotor disposed on the upper part of the motor housing. A motor assembly device is provided, including an assembly unit in which a shaft is provided at the bottom and a rotor pressing pin is provided at the top to press the upper end of the rotation axis of the rotor when the rotor is lowered.

Description

{APPARATUS FOR ASSEMBLING OF MOTOR}

An embodiment of the present invention relates to a motor assembly device that can more easily, accurately and safely assemble or disassemble a rotor into a motor housing equipped with a stator.

In general, electric vehicles, called eco-friendly vehicles, can generate driving force through an electric motor that obtains rotational force from electrical energy.

Electric vehicles drive in EV (Electric Vehicle) mode, a pure electric vehicle mode that uses only the power of the electric motor, or in HEV (Hybrid Electric Vehicle) mode, which uses both the engine and drive motor as power.

Most electric motors used as a power source for electric vehicles use permanent magnet synchronous motors (PMSM).

An electric motor, a permanent magnet type synchronous motor used as a power source for such an electric vehicle, basically consists of a stator that generates magnetic flux, and a rotor that rotates and is disposed with a certain air gap from the stator and is equipped with a permanent magnet.

Meanwhile, it is known that the output of an electric motor is proportional to the number of turns of the coil wound on the stator core. However, if the number of turns of the coil is increased, the size of the stator core or the electric motor itself including it inevitably increases, making miniaturization difficult.

Therefore, in order to improve output without increasing the size of the electric motor, the space factor of the coil wound on the stator core is increased. In other words, the dead space between the stator core and the winding coil or the dead space between each coil can be minimized to increase the coil space ratio.

Accordingly, recently, instead of using annular coils with a circular cross-section as coil windings, square coils such as square cross-sections (referred to as "segment coils" in the industry) have been used to reduce dead space and improve the space factor, thereby reducing the output compared to the same size. There is a trend to produce high electric motors.

In order to facilitate coil winding of the square coil, a plurality of separate hairpin-shaped (approximately U-shaped or V-shaped) stator coils are inserted into the slots of the stator core, and stator coils adjacent to the radial direction within the slots A method has been proposed to allow all individual stator coils to conduct electricity by welding the ends of the stator coils.

The stator manufactured as described above is assembled in a motor housing, and a rotor is combined with the motor housing in which the stator is assembled to form one electric motor. At this time, a gap (air gap) exists between the rotor and the stator when assembled. This is called an air gap.

As the air gap gets smaller, the performance of the electric motor including it improves and miniaturization becomes possible, so in recent years, the air gap has tended to get smaller.

However, if the air gap is reduced and the rotor is not accurately assembled to the motor housing, there is a high risk that the stator may be damaged during the rotor assembly process or that the stator may be damaged while the rotor rotates even after the rotor is assembled.

Therefore, technology for precisely assembling the rotor into the motor housing in which the stator is pre-assembled is very important.

The matters described in this background art section are written to improve understanding of the background of the invention, and may include matters that are not prior art already known to those skilled in the art in the field to which this technology belongs.

Republic of Korea Patent Publication No. 10-0086150 (2019.07.22.)

An embodiment of the present invention is intended to provide a motor assembly device that can more easily, accurately, and precisely assemble a rotor into a motor housing equipped with a stator.

In addition, embodiments of the present invention enable the rotor to be precisely and accurately assembled in a motor housing equipped with a stator, thereby minimizing the air gap between the stator and the rotor and preventing assembly interference and operation interference between the stator and the rotor, thereby preventing damage to the stator, etc. The purpose is to provide a motor assembly device that can prevent product defects and further improve product productivity.

According to one embodiment of the present invention, there is a motor assembly device for assembling or disassembling a rotor in a motor housing including a stator, comprising: a main body table having a product input point and an assembly point; a transfer jig unit provided to be movable between the product input point and the assembly point, on which the motor housing is seated; and a rotor fixture that is provided on the main body table so as to be able to be raised and lowered based on the assembly point, and passes through the transfer jig unit and the motor housing when raised to securely support the lower end of the rotation axis of the rotor disposed on the upper part of the motor housing. A motor assembly device is provided, including an assembly unit in which a shaft is provided at the bottom and a rotor pressing pin is provided at the top to press the upper end of the rotation axis of the rotor when the rotor is lowered.

The transfer jig unit may be configured to include a carrier that reciprocates linearly along a transfer rail provided between the product input point and the assembly point, and a seating plate provided on an upper portion of the carrier on which the motor housing is seated. there is.

Here, a first assembly reference hole through which the rotor fixing shaft passes may be formed in the carrier, and a second assembly reference hole corresponding to the first assembly reference hole may be formed in the seating plate. In this case, the seating plate may be formed. Can be fixed to the upper part of the carrier so that the center of the second assembly reference hole coincides with the first assembly reference hole.

In addition, a shaft coupling hole to which the lower end of the rotating shaft of the rotor is coupled may be formed in the lower part of the motor housing, and the shaft coupling hole may be provided with a bearing that rotatably supports the lower end of the rotating shaft of the rotor. In this case, the motor The housing may be fixed to the seating plate so that the center of the shaft coupling hole coincides with the second assembly reference hole.

In addition, a cylindrical bearing contact member in contact with the bearing may be provided at the upper part of the second assembly reference hole, and the height of the bearing contact member may be adjusted by a cylindrical fastening bolt provided at the lower part of the first assembly reference hole. Possibly supported.

The motor assembly device of this embodiment may further include a jig stopper that fixes the movement of the transfer jig unit at the assembly point. At this time, the jig stopper may be fixed in the form of a wall to the upper surface of the main table to prevent separation from the transfer rail of the carrier at the assembly point, and may be fastened to the carrier by a bolt to fix the movement of the carrier. You can.

The assembly unit includes: a cylinder clamp provided on both sides of the assembly point, raised and lowered to the upper and lower portions of the main body table, and fixed to the lower end of the rotor fixing shaft at the center of the lower end; and an upper pressing tool provided at the upper center of the cylinder clamp and having a mounting portion at the lower center to which the rotor pressing pin is detachably fixed.

Here, the lower end of the rotor fixing shaft may be fixed to a lower supporter connected to and fixed to both sides of the lower end of the cylinder clamp, and the upper end of the rotor fixing shaft may be supported so that the tip is exposed to the bush fixed to the main body table. .

In addition, the upper pressing tool may be fixed to the upper supporter so as to be raised and lowered, which is connected and fixed to both sides of the upper end of the cylinder clamp.

Additionally, the upper pressing tool may include a load cell that is provided on the upper part of the mounting unit and detects a load applied to the rotor pressing pin.

At this time, the downward movement of the cylinder clamp can be controlled in response to the load detected by the load cell. That is, the cylinder clamp is lowered while the rotor pressure pin presses and supports the upper end of the rotor's rotation axis, and the load cell detects the load applied to the motor housing when the rotor is completed, thereby confirming whether assembly is complete. The cylinder clamp can be controlled to stop downward movement.

According to an embodiment of the present invention, there is an advantage that the rotor can be more easily, accurately, and precisely assembled inside the motor housing provided with the stator.

And, according to one embodiment of the present invention, the air gap between the stator and the rotor is minimized by precisely and accurately assembling the rotor to the motor housing equipped with the stator, thereby increasing the performance of the electric motor and reducing assembly defects between the stator and the rotor. It has the advantage of improving productivity by preventing malfunctions.

1 is a front view schematically showing a motor assembly device according to an embodiment of the present invention.
Figure 2 is a side view of Figure 1
Figure 3 is a plan view of Figure 1
Figure 4a is a schematic diagram showing the main parts before the rotor fixing shaft is passed through the motor housing mounted on the transfer jig unit of Figure 1.
Figure 4b is an enlarged view of part 'A' of Figure 4a
5A to 5F are diagrams of main parts for explaining the assembly process of the motor assembly device according to an embodiment of the present invention,
Figure 5a is a diagram showing the state in which the motor housing with the stator assembled in the transfer jig unit is seated and located at the assembly point.
Figure 5b is a view showing a state in which the cylinder clamp rises and the rotor fixing shaft passes through the motor housing to support the lower end of the rotor's rotation axis.
Figure 5c is a diagram showing a state in which the upper pressure tool is lowered and the rotor pressure pin installed on the mounting portion presses and supports the top of the rotor.
Figure 5d is a diagram showing a state in which the cylinder clamp is lowered and the rotor is inserted into the motor housing and assembled.
Figure 5e is a view showing a state in which the upper pressure tool is raised and the rotor pressure pin is separated from the mounting part.
Figure 5f is a view showing a state in which the cylinder clamp is further lowered and the rotor fixing shaft is separated from the bottom of the rotor.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The detailed description below is provided to facilitate a comprehensive understanding of the methods, devices and/or systems described herein. However, this is only an example and the disclosed embodiments are not limited thereto.

In describing the embodiments, if it is determined that a detailed description of related known technology may unnecessarily obscure the gist of the disclosed embodiments, the detailed description will be omitted. In addition, terms described below are terms defined in consideration of functions in the disclosed embodiments, and may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the contents throughout this specification. The terminology used in the detailed description is only for describing embodiments and should in no way be limiting. Unless explicitly stated otherwise, singular forms include plural meanings. In this description, expressions such as “comprising” or “comprising” are intended to indicate certain features, numbers, steps, operations, elements, parts or combinations thereof, and one or more than those described. It should not be construed to exclude the existence or possibility of any other characteristic, number, step, operation, element, or part or combination thereof.

Figure 1 is a front view schematically showing a motor assembly device according to an embodiment of the present invention, Figure 2 is a side view of Figure 1, and Figure 3 is a top view of Figure 1. And, Figure 4a is a schematic diagram showing the main parts before the rotor fixing shaft passes through the motor housing mounted on the transfer jig unit of Figure 1, and Figure 4b is an enlarged view of portion 'A' of Figure 4a.

1 to 4B, the motor assembly device 100 according to an embodiment of the present invention is a motor assembly for assembling or disassembling the rotor 13 in the motor housing 12 including the stator 11. As a device, it is largely provided with a main body table 110 having a product input point 111 and an assembly point 112, movable between the product input point 111 and the assembly point 112, and the motor housing. A transfer jig unit 120 on which (12) is seated is provided on the main body table 110 to be able to be raised and lowered based on the assembly point 112, and when raised, the lower end 13a of the rotation axis of the rotor 13 is moved. It may include an assembly unit 130 having a rotor fixing shaft 131 for fixed support and a rotor pressing pin 132 for pressurizing and supporting the upper end 13b of the rotation axis 13b of the rotor 13 when the rotor 13 is lowered.

The main body table 110 may be composed of a frame in the shape of an approximately square case, and the product input point 111 and the assembly point 112 may be formed on the upper surface. In addition, a pair of transfer rails 113 may be provided between the product input point 111 and the assembly point 112 on the upper surface of the main body table 110, and the transfer jig unit 120 Through the pair of transfer rails 113, the motor housing 12 can be reciprocated between the product input point 111 and the assembly point 112 for loading and unloading. In addition, the assembly unit 130 may be provided to be raised and lowered from the upper space of the upper surface of the main body table 110 to the lower space based on the assembly point 112.

The transfer jig unit 120 includes a carrier 121 that moves linearly between the product input point 111 and the assembly point 112 along the transfer rail 113, and an upper part of the carrier 121. It may be configured to include a seating plate 122 on which the motor housing 12 is seated. Here, a transfer member 123 coupled to the transfer rail 113 may be provided on the lower surface of the carrier 121, and the transfer member 123 moves along the transfer rail 113 to transport the carrier. (121) can be moved. Additionally, a first assembly reference hole 121a through which the rotor fixing shaft 131 passes may be formed in the carrier 121, and the first assembly reference hole 121a may be formed in the seating plate 122. A second assembly reference hole 122a may be formed. Therefore, when the motor housing 12 is mounted on the seating plate 122, the seating plate 122 has the centers of the second assembly reference hole 122a and the first assembly reference hole 121a aligned with each other. It can be detachably fixed to the upper part of the carrier 121 to match. Meanwhile, a shaft coupling hole 12a may be formed in the lower part of the motor housing 12 to which the lower end 13a of the rotation shaft 13a of the rotor 13 is coupled, and the rotor 13 is located in the shaft coupling hole 12a. A bearing 12b may be provided to rotatably support the lower end 13a of the rotation shaft. At this time, the motor housing 12 may be detachably fixed to the seating plate 122 so that the centers of the shaft coupling hole 12a and the second assembly reference hole 122a coincide with each other. In addition, a cylindrical bearing contact member 124a in contact with the bearing 12b may be provided on the upper part of the second assembly reference hole 122a, and at this time, the bearing contact member 124a is the first assembly reference hole 122a. It can be supported in a height-adjustable manner by a cylindrical fastening bolt 124b provided at the bottom of the hole 121a. At this time, a nut 124c may be interposed for stable fastening of the fastening bolt 124b, and the second assembly reference hole 122a is formed larger than the first assembly reference hole 121a to ensure that the bearing contact member (124a) can be smoothly adjusted in height within the second assembly reference hole (122a).

Meanwhile, the motor assembly device 100 of this embodiment may include a jig stopper 141 that fixes the movement of the transfer jig unit 120 at the assembly point 112. That is, the jig stopper 141 prevents the carrier 121 from being separated from the transfer rail 113 at the assembly point 112 and ensures that it is fixed at the correct assembly position. As an example, the jig stopper 141 is formed in the form of a wall fixed to the upper surface of the main body table 110 and is in vertical contact with one side of the carrier 121 to limit the movement of the carrier 121 in this state. The movement of the carrier 121 can be fixed by being fastened to one side of the carrier 121 with a bolt.

The assembly unit 130 largely passes through the transfer jig unit 120 and the motor housing 12 and fixes the lower end 13a of the rotation axis of the rotor 13 disposed on the upper part of the motor housing 12. A cylinder clamp 133 having a supporting rotor fixing shaft 131, and a rotor pressing pin 132 provided on the upper part of the cylinder clamp 133 to press and support the upper end 13b of the rotation axis of the rotor 13. It may be configured to include an upper pressing tool 134.

In more detail, the cylinder clamp 133 may be provided on both sides of the assembly point 112 and may be made of a pair of cylinders that are raised and lowered above and below the main body table 110. For example, the cylinder clamp 133 may be provided on both sides of the assembly point 112. Can be raised and lowered to the upper and lower parts of the main body table 110 through a driving device including a jack screw and a thermomotor. At this time, the pair of cylinders can be supported to be raised and lowered through a cylindrical cylinder support member 114 provided on the main body table 110. In addition, lower supports 135 may be connected and fixed to both sides of the lower end of the cylinder clamp 133, and upper supports 136 may be connected and fixed to both sides of the upper end of the cylinder clamp 133. Accordingly, the lower end of the rotor fixing shaft 131 may be fixed to the center of the lower supporter 135. At this time, the upper end of the rotor fixing shaft 131 may be supported to be raised and lowered so that the tip is exposed to the cylindrical bush 115 fixed to the main body table 110.

In addition, the upper pressing tool 134 may be provided to be able to be raised and lowered at the lower part of the upper supporter 136. In this case, the upper pressing tool 134 is supported on both sides of the cylinder clamp 133. It can be raised and lowered via a pressure tool jig 137 that is provided to be able to raise and lower. That is, the pressure tool jig 137 may be provided to be able to be raised and lowered through a hydraulic cylinder 138 at the lower part of the upper supporter 136, and the upper pressure tool is located at the lower center of the pressure tool jig 137. (134) may be fixed, but is not limited to this, and the upper pressure tool 134 may be directly connected to the hydraulic cylinder to be raised and lowered. Here, a mounting portion 134a to which the rotor pressure pin 132 is detachably fixed may be provided at the bottom center of the upper pressure tool 134. In addition, a load cell 134b is provided on the upper part of the mounting part 134a to detect the load applied to the rotor pressure pin 132, and the cylinder clamp 133 is installed in response to the load detected by the load cell 134b. ) can be controlled. That is, the cylinder clamp 133 is lowered while the rotor pressing pin 132 presses and supports the top 13b of the rotation axis of the rotor 13, and the rotor 13 is assembled to the motor housing 12. It is possible to check whether the assembly of the rotor 13 has been completed by detecting the load applied upon completion by the load cell 134b, and at this time, the cylinder clamp 133 can be controlled to stop the downward movement.

Figures 5A to 5F are diagrams of main parts for explaining the assembly process of the motor assembly device according to an embodiment of the present invention. Figure 5A shows the motor housing with the stator assembled in the transfer jig unit seated at the assembly point. Figure 5b is a diagram showing a state in which the cylinder clamp is raised and the rotor fixing shaft passes through the motor housing to support the lower end of the rotor's rotation axis. Figure 5c is a diagram showing a state in which the upper pressure tool is lowered and the rotor installed in the mounting part is shown. A diagram showing a state in which a pressure pin presses and supports the top of the rotor. Figure 5D is a diagram showing a state in which the cylinder clamp is lowered and the rotor is inserted into the motor housing and assembled. Figure 5E is a diagram showing the state in which the upper pressure tool is raised and removed from the mounting part. This is a diagram showing a state in which the rotor pressure pin is separated, and Figure 5f is a diagram showing a state in which the cylinder clamp is further lowered and the rotor fixing shaft is separated from the bottom of the rotor.

The assembly process of the motor assembly device 100 of this embodiment will be described in more detail with further reference to FIGS. 5A to 5F as follows.

First, the assembly target motor housing 12 equipped with the stator 11 is coupled and fixed to the seating plate 122 by bolting or the like.

Then, the seating plate 122 to which the motor housing 12 is coupled is coupled to the upper part of the carrier 121. At this time, the centers of the first assembly reference hole 121a and the second assembly reference hole 122a are combined so that they coincide with each other.

Next, as shown in FIG. 5A, the motor housing 12 is loaded by moving the carrier 121 to the assembly point 112 in the initial origin state where the cylinder clamp 133 is lowered and the product is introduced.

Then, as shown in FIG. 5B, the cylinder clamp 133 is raised so that the rotor fixing shaft 131 passes through the first and second assembly reference holes 121a and 122a and the motor housing 12 and moves upward. Let it be exposed.

Then, the lower end of the rotating shaft 13a of the rotor 13 is placed on the upper end of the rotor fixing shaft 131. In addition, the rotor pressing pin 132 is coupled to the mounting portion 134a of the upper pressing tool 134.

In this state, as shown in FIG. 5C, the upper pressing tool 134 is lowered to press and support the upper end of the rotation axis 13b of the rotor 13 with the lower end of the rotor pressing pin 132.

Next, as shown in FIG. 5D, the cylinder clamp 133 is lowered to assemble the rotor 13 inside the motor housing 12.

Here, the lower end (13a) and upper end (13b) of the rotation axis of the rotor 13 are fixed and supported by the rotor fixing shaft 131 and the rotor pressing pin 132, respectively, aligned on the same axis line. By being assembled into the housing 12, the rotor 13 can be accurately and precisely assembled inside the motor housing 12.

At this time, the load cell 134b detects the load applied when the rotor 13 is completed on the motor housing 12, thereby confirming whether the rotor 13 has been assembled. At this time, the cylinder clamp 133 is The downward movement can be controlled to stop.

Thereafter, as shown in FIG. 5E, the upper pressing tool 134 is raised, and the rotor pressing pin 132 is separated and removed from the mounting portion 134a of the upper pressing tool 134.

Next, the cylinder clamp 133 is further lowered to return the rotor fixing shaft 131 to the initial origin position for product removal.

Thereafter, the carrier 121 is moved to the product insertion position, the seating plate 122 is separated from the carrier 121, and the motor housing 12 in which the rotor 13 is assembled can be unloaded.

Although representative embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims described later but also by equivalents to the claims.

11: Stator
12: motor housing
12a: shaft coupling hole
12b: Bearing
13: rotor
13a: Bottom of rotation axis
13b: Top of rotation axis
100: motor assembly device
110: main body table
111: Product input point
112: assembly point
113: transfer rail
114: cylinder bush
115: Bush
120: Transfer jig unit
121: carrier
122: Seating plate
123: transfer member
124a: Bearing contact member
124b: fastening bolt
124c: nut
130: assembly unit
131: Rotor fixed shaft
132: Rotor press pin
133: cylinder clamp
134: Upper pressure tool
134a: Mounting part
134b: load cell
135: lower supporter
136: upper supporter
137: Pressure tool jig
138: hydraulic cylinder

Claims (10)

A motor assembly device for assembling or disassembling a rotor in a motor housing including a stator,
a main body table having a product input point and an assembly point;
a transfer jig unit provided to be movable between the product input point and the assembly point, on which the motor housing is seated; and
A rotor fixing shaft is provided on the main body table to be able to be raised and lowered based on the assembly point, and when raised, passes through the transfer jig unit and the motor housing and fixedly supports the lower end of the rotation axis of the rotor disposed on the upper part of the motor housing. It includes an assembly unit provided at the bottom, and a rotor pressure pin for pressing the top of the rotation axis of the rotor when lowered is provided at the top,
The transfer jig unit is,
It includes a carrier that linearly reciprocates along a transfer rail provided between the product input point and the assembly point, and a seating plate provided on an upper portion of the carrier on which the motor housing is seated,
A first assembly reference hole through which the rotor fixing shaft passes is formed in the carrier, and a second assembly reference hole corresponding to the first assembly reference hole is formed in the seating plate,
A shaft coupling hole is formed in the lower part of the motor housing to which the lower end of the rotating shaft of the rotor is coupled, and the shaft coupling hole is provided with a bearing that rotatably supports the lower end of the rotating shaft of the rotor,
A cylindrical bearing contact member in contact with the bearing is provided at the top of the second assembly reference hole,
A motor assembly device, wherein the bearing contact member is supported in a height-adjustable manner by a cylindrical fastening bolt provided at a lower portion of the first assembly reference hole.
delete In claim 1,
The seating plate is fixed to the upper part of the carrier so that the center of the second assembly reference hole coincides with the first assembly reference hole.
In claim 1,
The motor housing is fixed to the seating plate so that the center of the shaft coupling hole coincides with the second assembly reference hole.
delete In claim 1,
The assembly unit is,
a cylinder clamp provided on both sides of the assembly point, raised and lowered to the upper and lower portions of the main body table, and fixed to the lower end of the rotor fixing shaft at the center of the lower end; and
A motor assembly device comprising: an upper pressing tool provided at the upper center of the cylinder clamp and having a mounting portion at the lower center to which the rotor pressing pin is detachably fixed.
In claim 6,
The lower end of the rotor fixing shaft is fixed to a lower supporter connected and fixed to both sides of the lower end of the cylinder clamp, and the upper end of the rotor fixing shaft is supported so that the tip is exposed to the bush fixed to the main body table,
The upper pressing tool is fixed to the upper supporter connected to both sides of the upper end of the cylinder clamp so that it can be raised and lowered.
In claim 6 or claim 7,
The upper pressing tool is provided on the upper part of the mounting unit and includes a load cell that detects a load applied to the rotor pressing pin.
In claim 8,
A motor assembly device in which the downward movement of the cylinder clamp is controlled in response to the load detected by the load cell.
In claim 1,
Motor assembly device further comprising a jig stopper for fixing movement of the transfer jig unit at the assembly point.