KR20230069587A - Apparatus for assembling of motor - Google Patents

Abstract

The present invention relates to a motor assembly apparatus which can more easily, accurately, and safely assemble or disassemble a rotor from a motor housing equipped with a stator. According to an embodiment of the present invention, the motor assembly device for assembling or disassembling a rotor from a motor housing equipped with a stator comprises: a main body table having a product input point and an assembly point; a transfer jig unit provided to move between the product input point and the assembly point and on which the motor housing is received; and an assembly unit provided on the main body table to be lifted and lowered with respect to the assembly point, having, disposed on the lower part, a rotor fixing shaft which passes through the transfer jig unit and the motor housing when being lifted to fix and support the lower end of a rotation shaft of a rotor disposed on the upper part of the motor housing, and having, disposed on the upper part, a rotor pressing pin which presses the upper end of the rotation shaft of the rotor when being lowered.

Description

Motor assembly device {APPARATUS FOR ASSEMBLING OF MOTOR}

Embodiments of the present invention relate to a motor assembly device capable of assembling or disassembling a rotor to a motor housing equipped with a stator more easily, accurately and safely.

In general, an electric vehicle called an eco-friendly vehicle may generate driving force by an electric motor that obtains rotational force with electrical energy.

An electric vehicle runs in an EV (Electric Vehicle) mode, which is a pure electric vehicle mode using only power from an electric motor, or in a hybrid electric vehicle (HEV) mode using both an engine and a drive motor as power.

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

An electric motor as a permanent magnet type synchronous motor used as a power source of such an electric vehicle is basically composed of a stator generating magnetic flux, and a rotor disposed with a predetermined air gap from the stator and provided with permanent magnets to perform rotational motion.

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

Therefore, in order to improve the output without increasing the size of the electric motor, the space factor of the coil wound around the stator core is increased. That is, 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 occupancy factor.

Therefore, in recent years, instead of using an annular coil having a circular cross section as a coil winding, a rectangular coil (referred to as a “segment coil” in the industry) is used to reduce dead space and improve the occupancy rate, resulting in output compared to the same size. There is a trend to produce high electric motors.

In order to facilitate the coil winding work of the prismatic coil, a plurality of separate hairpin-shaped (approximately U-shaped or V-shaped) stator coils are inserted into slots of the stator core, and stator coils radially adjacent to each other in the slots A method of welding the ends of the stator coils to make the individual stator coils fully energized has been proposed.

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

As the air gap decreases, performance of the electric motor including the air gap improves and miniaturization is possible.

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

Therefore, a technique for precisely assembling the rotor to the motor housing in which the stator is pre-assembled is very important.

Matters described in this background art section are prepared to enhance understanding of the background of the invention, and may include matters that are not prior art already known to those skilled in the art to which this technique belongs.

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

An embodiment of the present invention is to provide a motor assembly device capable of more easily, accurately and precisely assembling a rotor to a motor housing equipped with a stator.

In addition, the embodiment of the present invention can precisely and accurately assemble the rotor to the motor housing equipped with the stator, thereby minimizing the air gap between the stator and the rotor while preventing assembly interference and operation interference between the stator and the rotor, thereby preventing damage to the stator, etc. It is to provide a motor assembly device capable of preventing product defects and further improving product productivity.

According to one embodiment of the present invention, a motor assembling apparatus for assembling or disassembling a rotor in a motor housing including a stator, a body table having a product input point and an assembly point; a transfer jig unit movably provided between the product input point and the assembly point and on which the motor housing is seated; And a rotor fixing provided on the main body table so as to be able to move up and down based on the assembly point, and passing through the transfer jig unit and the motor housing when ascending and fixing and supporting the lower end of the rotating shaft of the rotor disposed on the upper part of the motor housing. There is provided a motor assembling apparatus including an assembly unit having a shaft provided at a lower portion and a rotor pressure pin for pressing an upper end of the rotating shaft of the rotor when lowered at an upper portion.

The transfer jig unit may include a carrier that linearly reciprocates along a transfer rail provided between the product input point and the assembly point, and a mounting plate provided on top of the carrier and 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. may be fixed to an upper portion of the carrier so that the center of the second assembly reference hole coincides with the first assembly reference hole.

Further, a shaft coupling hole to which a lower end of the rotary shaft of the rotor is coupled may be formed in a lower portion of the motor housing, and a bearing for rotatably supporting the lower end of the rotary shaft of the rotor may be provided in the shaft coupling hole. At this time, 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 contacting the bearing may be provided above the second assembly reference hole, and at this time, the height of the bearing contact member is adjusted by a cylindrical fastening bolt provided below the first assembly reference hole. can possibly be supported.

The motor assembly device of this embodiment may further include a jig stopper for fixing 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 body table in order to prevent the carrier from departing from the transport rail at the assembly point, and is fastened with the carrier by bolts to fix the movement of the carrier can

The assembling unit includes: a cylinder clamp provided on both sides of the assembling point to move upward and downward of the body table and fixing a lower end of the rotor fixing shaft to a lower center; and an upper pressing tool provided at a center of an upper end of the cylinder clamp and having a mounting portion to which the rotor pressing pin is detachably fixed to a lower center.

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

In addition, the upper pressing tool may be fixed to an upper supporter that is connected and fixed to both sides of the upper end of the cylinder clamp so as to be able to move up and down.

In addition, the upper pressing tool may include a load cell provided on the mounting part to sense a load applied to the rotor pressing pin.

At this time, the downward movement of the cylinder clamp may be controlled in response to the load sensed by the load cell. That is, in a state where the rotor pressing pin presses and supports the upper end of the rotating shaft of the rotor, the cylinder clamp descends and the load cell detects the load applied when the rotor is assembled to the motor housing, thereby confirming whether or not the assembly has been completed. The cylinder clamp can be controlled to stop its downward movement.

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

In addition, according to one embodiment of the present invention, by precisely and accurately assembling the rotor to the motor housing equipped with the stator, the air gap between the stator and the rotor is minimized to improve the performance of the electric motor, and the assembly failure between the stator and the rotor and 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 block diagram schematically showing the main part before the rotor fixing shaft passes through the motor housing seated in the transfer jig unit of Figure 1
Figure 4b is an enlarged view of 'A' portion of Figure 4a
5a to 5f are views of the main parts for explaining the assembly process of the motor assembly device according to an embodiment of the present invention,
5A is a view showing a state in which a motor housing in which a stator is assembled in a transfer jig unit is seated and positioned at an assembly point;
5B is a view showing a state in which the cylinder clamp is raised so that the rotor fixing shaft passes through the motor housing and supports the lower end of the rotating shaft of the rotor
5C is a view showing a state in which the upper pressing tool is lowered and the rotor pressing pin installed in the mounting part presses and supports the top of the rotor
5D is a view showing a state in which the cylinder clamp is lowered and the rotor is inserted into the motor housing and assembled
5E is a view showing a state in which the upper pressing tool is raised and the rotor pressing 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 lower end of the rotor

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

In describing the embodiments, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the disclosed embodiments, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the disclosed embodiments, which may vary according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout this specification. Terminology used in the detailed description is only for describing the embodiments and should in no way be limiting. Unless expressly used otherwise, singular forms of expression include plural forms. In this description, expressions such as "comprising" or "comprising" are intended to indicate any characteristic, number, step, operation, element, portion or combination thereof, one or more other than those described. It should not be construed to exclude the existence or possibility of any other feature, number, step, operation, element, part or combination thereof.

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

1 to 4B, a motor assembly apparatus 100 according to an embodiment of the present invention is a motor assembly for assembling or disassembling a rotor 13 to a motor housing 12 including a stator 11. As a device, the main body table 110 having a product input point 111 and an assembly point 112 is movably provided between the product input point 111 and the assembly point 112, and the motor housing The transfer jig unit 120 on which 12 is seated and the body table 110 are provided so as to be able to move up and down based on the assembly point 112, and the lower end 13a of the rotary shaft of the rotor 13 is provided when it is raised. It may include an assembly unit 130 having a rotor fixing shaft 131 for fixed support and a rotor pressure pin 132 for pressurizing and supporting the upper end 13b of the rotating shaft of the rotor 13 when descending.

The body table 110 may be configured as a frame having a substantially rectangular case shape, and the product input point 111 and the assembly point 112 may be formed on an upper surface thereof. 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 body table 110, and thus the transfer jig unit 120 For loading and unloading of the motor housing 12 through the pair of transfer rails 113, it is possible to reciprocate between the product input point 111 and the assembly point 112. In addition, the assembling unit 130 may be provided to move up and down from the upper space to the lower space of the upper surface of the body table 110 based on the assembling point 112 .

The transfer jig unit 120 includes a carrier 121 linearly reciprocating between the product input point 111 and the assembly point 112 along the transfer rail 113, and an upper portion of the carrier 121. It may include a seating plate 122 on which the motor housing 12 is seated. Here, a conveying member 123 coupled to the conveying rail 113 may be provided on a lower surface of the carrier 121, and thus the conveying member 123 moves along the conveying rail 113, thereby moving the carrier. (121) can be moved. Also, 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 corresponds to the seating plate 122. A second assembly reference hole 122a may be formed. Therefore, in a state in which the motor housing 12 is mounted on the seating plate 122, the seating plate 122 has the center of the second assembly reference hole 122a and the first assembly reference hole 121a mutually. It may be detachably fixed to the top of the carrier 121 to match. Meanwhile, a shaft coupling hole 12a to which a lower end 13a of the rotation shaft of the rotor 13 is coupled may be formed at a lower portion of the motor housing 12, and the shaft coupling hole 12a has the rotor 13 A bearing 12b rotatably supporting the lower end 13a of the rotation shaft may be provided. At this time, the motor housing 12 may be detachably fixed to the seating plate 122 such that the center of the shaft coupling hole 12a and the second assembly reference hole 122a coincide with each other. A cylindrical bearing contact member 124a contacting the bearing 12b may be provided above the second assembly reference hole 122a. At this time, the bearing contact member 124a is the first assembly standard. It may be supported in a height-adjustable manner by a cylindrical fastening bolt 124b provided at a lower portion 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 form 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 for fixing 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 transport rail 113 at the assembly point 112 and allows it to be fixed at an accurate assembly position. For example, the jig stopper 141 is made in the form of a wall fixed to the upper surface of the body table 110 and is in vertical contact with one side of the carrier 121 to limit the movement of the carrier 121, and in this state It is possible to fix the movement of the carrier 121 by being fastened with one side of the carrier 121 by 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 rotating shaft of the rotor 13 disposed on the upper part of the motor housing 12. A cylinder clamp 133 having a rotor fixing shaft 131 for supporting, and a rotor pressure pin 132 provided on top of the cylinder clamp 133 and pressurizing and supporting the upper end 13b of the rotating shaft of the rotor 13 It may be configured to include an upper pressing tool 134 having.

More specifically, the cylinder clamp 133 may be formed of a pair of cylinders provided on both sides of the assembly point 112 and moving up and down to the upper and lower portions of the body table 110. For example, the pair of cylinders may be raised and lowered to the upper and lower portions of the body table 110 through a driving device including a jack screw and a thermomotor. At this time, the pair of cylinders may be supported in an elevating and descending manner through a cylindrical cylinder support member 114 provided on the body table 110 . Further, lower supporters 135 may be connected and fixed to both sides of the lower end of the cylinder clamp 133, and upper supporters 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 so as to be raised and lowered so that the tip is exposed to the cylindrical bush 115 fixed to the body table 110 .

In addition, the upper pressing tool 134 may be provided to be able to move up and down at the lower part of the upper supporter 136. At this time, the upper pressing tool 134 is in a state in which both sides of the cylinder clamp 133 are supported. It can be moved up and down via the pressure tool jig 137 provided to be able to go up and down. That is, the pressure tool jig 137 may be provided at the bottom of the upper supporter 136 to be able to move up and down through the hydraulic cylinder 138, 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 thereto, and the upper pressing tool 134 may be directly connected to the hydraulic cylinder to move up and down. Here, a mounting portion 134a to which the rotor pressing pin 132 is detachably fixed may be provided at the lower center of the upper pressing tool 134 . In addition, a load cell 134b is provided above the mounting portion 134a to sense a load applied to the rotor pressure pin 132, and the cylinder clamp 133 corresponds to the load detected by the load cell 134b. ) can be controlled. That is, in a state where the rotor pressing pin 132 presses and supports the upper end 13b of the rotating shaft of the rotor 13, the cylinder clamp 133 descends and the rotor 13 is assembled to the motor housing 12. When the load cell 134b detects the load upon completion, it is possible to check whether or not the assembly of the rotor 13 has been completed, and at this time, the cylinder clamp 133 can be controlled to stop the downward movement.

5A to 5F are views of main parts for explaining an assembly process of a motor assembly device according to an embodiment of the present invention, and FIG. 5A is a motor housing assembled with a stator in a transfer jig unit and positioned at an assembly point. Figure 5b is a view 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 rotating shaft of the rotor, and Figure 5c is a view showing the rotor installed in the mounting part as the upper pressure tool is lowered FIG. 5D is a view showing a state in which the pressure pin presses and supports the top of the rotor, and FIG. 5D is a view showing a state in which the cylinder clamp is lowered and the rotor is inserted into the motor housing and assembled. FIG. FIG. 5F is a view showing a state in which the rotor pressing pin is separated, and FIG. 5F is a view showing a state in which the cylinder clamp is further lowered and the rotor fixing shaft is separated from the lower end of the rotor.

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

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

Then, the mounting plate 122 to which the motor housing 12 is coupled is coupled to an upper portion of the carrier 121 . At this time, the first assembling reference hole 121a and the second assembling reference hole 122a are coupled so that their centers coincide with each other.

Next, as shown in FIG. 5A, the cylinder clamp 133 is lowered to load the motor housing 12 by moving the carrier 121 to the assembly point 112 in the initial origin state where 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 to the top. make it exposed.

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

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

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

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

At this time, the load cell 134b detects the load applied when the rotor 13 is assembled to the motor housing 12, so that it is possible to check whether the rotor 13 has been assembled, and at this time, the cylinder clamp 133 The downward movement can be controlled to stop.

Then, 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 position for product removal.

Thereafter, the carrier 121 may be moved to a product input position, the mounting plate 122 may be separated from the carrier 121, and the motor housing 12 to which the rotor 13 is assembled may 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 are possible 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 and should not be defined, and should be defined by not only the claims to be described later, but also those equivalent to these claims.

11: stator
12: motor housing
12a: shaft coupling hole
12b: bearing
13: rotor
13a: bottom of rotation shaft
13b: top of the axis of rotation
100: motor assembly device
110: 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: conveying member
124a: bearing contact member
124b: fastening bolt
124c: nut
130: assembly unit
131: rotor fixing shaft
132: rotor pressing 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 to a motor housing including a stator,
A body table having a product input point and an assembly point;
a transfer jig unit movably provided between the product input point and the assembly point and on which the motor housing is seated; and
The rotor fixing shaft is provided on the main body table so as to be able to move up and down based on the assembly point, and passes through the transfer jig unit and the motor housing when ascending to fixably support the lower end of the rotating shaft of the rotor disposed on the upper part of the motor housing. Is provided at the bottom, the assembly unit which is provided at the top of the rotor pressure pin for pressing the upper end of the rotating shaft of the rotor when descending; comprising a motor assembly device.
The method of claim 1,
The transfer jig unit,
A motor assembly device comprising: a carrier reciprocating in a straight line along a transport rail provided between the product input point and the assembly point, and a mounting plate provided on an upper portion of the carrier and on which the motor housing is seated.
The method of claim 2,
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,
The mounting plate is fixed to the upper portion of the carrier so that the center of the second assembly reference hole coincides with the first assembly reference hole.
The method of claim 3,
A shaft coupling hole to which the lower end of the rotary shaft of the rotor is coupled is formed in the lower part of the motor housing, and a bearing for rotatably supporting the lower end of the rotary shaft of the rotor is provided in the shaft coupling hole,
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.
The method of claim 4,
A cylindrical bearing contact member contacting the bearing is provided above the second assembly reference hole,
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, the motor assembly device.
The method of claim 1,
The assembly unit is
Cylinder clamps provided on both sides of the assembly point to ascend and descend to the upper and lower portions of the body table, and fixing the lower end of the rotor fixing shaft to 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 to which the rotor pressing pin is detachably fixed at the lower center.
The method of 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 its tip is exposed to a bush fixed to the 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 as to be able to move up and down, the motor assembly device.
According to claim 6 or claim 7,
The upper pressing tool includes a load cell provided on an upper portion of the mounting portion to detect a load applied to the rotor pressing pin.
The method of claim 8,
In response to the load sensed by the load cell, the lowering movement of the cylinder clamp is controlled, the motor assembly device.
The method of claim 1,
Further comprising a jig stopper for fixing the movement of the transfer jig unit at the assembly point, the motor assembly device.

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