JP2022044447A - Motor with brake, manufacturing method of motor series, and motor with detection device - Google Patents

Abstract

To provide a motor with a brake, a manufacturing method of a motor series, and a motor with a detection device, which can easily maintain a brake or a detection device without the need to remove a lead wire.SOLUTION: A motor with a brake includes a motor frame provided with a motor shaft inside, a brake for braking the motor shaft, and a first brake cover and a second brake cover in which the brake is housed inside and that are formed so as to be divided into two parts. The first brake cover is provided with a communication hole that communicates in an axial direction, and a brake lead wire connected to the brake passes through the communication hole and is drawn into the inside of the motor frame. Since the brake can be maintained simply by removing the second brake cover, there is no need to remove the brake lead wire, which facilitates maintenance work.SELECTED DRAWING: Figure 2

Description

The present invention relates to a method for manufacturing a motor series including a motor with a brake having a brake for which the brake can be easily adjusted, a motor with a detection device for which the detection device can be easily adjusted, and a motor with a brake.

Conventionally, Patent Document 1 has a relay packing provided with first and second lead holes communicating with a frame window and a bracket window between a frame and a spacer, and connecting holes connecting the first and second lead holes. Disclosed is a motor with an electromagnetic brake in which the lead wire of the electromagnetic brake is passed from the first lead hole through the connecting hole to the second lead hole. According to this motor with an electromagnetic brake, even if the lead wire of the stator winding is pushed into the frame, the lead wire of the electromagnetic brake is not affected by the lead wire of the stator winding. It will not be pressed or damaged by the corners or the rotating parts of the electromagnetic brake.

Japanese Unexamined Patent Publication No. 9-23609

However, conventionally, in such a motor with an electromagnetic brake, when the brake disc (moving part) is worn due to use, the distance (gap) between the brake field (fixed part) and the armature (moving part) becomes wide, and the armature becomes wide. The suction force of the brake coil becomes weak and the braking cannot be released. Therefore, it is necessary to adjust the gap by maintenance and maintain it at an appropriate value. In the motor with an electromagnetic brake described in Patent Document 1, it is necessary to remove the bracket in order to adjust the gap, and for that purpose, it is necessary to temporarily remove the lead wire of the brake, so that maintenance is troublesome. It ends up.

Further, in the motor with an electromagnetic brake described in Patent Document 1, instead of the electromagnetic brake, a detection device such as an encoder for detecting the rotation of the motor shaft is provided, and the lead wire of the encoder is similarly connected from the first lead hole to the connecting hole. Even when considering the structure through which the lead wire is passed through the second lead hole, it is necessary to remove the bracket when maintaining the encoder, and it is also necessary to remove the lead wire once, so maintenance is troublesome. It ends up.

The present invention has been made to solve the above-mentioned problems, and is a motor with a brake, a motor with a detection device, and a motor with a detection device, which can easily perform maintenance of a brake or a detection device without removing the lead wire. It is an object of the present invention to provide a manufacturing method of a motor series.

In order to achieve this object, the braked motor according to claim 1 includes a motor frame having a motor shaft inside, a brake for braking the motor shaft, and the brake inside. The first brake cover and the second brake cover, which are formed so as to be divisible, are provided, and the first brake cover is arranged between the motor frame and the brake, and the first brake cover is arranged between the motor frame and the brake. The second brake cover is arranged on the side opposite to the first brake cover with the brake interposed therebetween, and the first brake cover is provided with a communication hole for communicating in the axial direction, and the brake is provided. The brake lead wire connected to is characterized in that it passes through the communication hole and is drawn into the motor frame.
The braked motor according to claim 2 is the braked motor according to claim 1, and the split surface between the first brake cover and the second brake cover is the motor shaft. It is characterized in that it is located at a position overlapping the brake when viewed from a direction perpendicular to the axis.
The brake-equipped motor according to claim 3 is the brake-equipped motor according to claim 1 or 2, further, the brake includes a brake field having a built-in brake coil, and the first brake cover. The split surface with the second brake cover is characterized in that it is located at a position overlapping the brake field when viewed from a direction perpendicular to the axis of the motor shaft.
The braked motor according to claim 4 is the braked motor according to any one of claims 1 to 3, and is further arranged between the motor frame and the first brake cover. A motor bracket that rotatably supports the motor shaft via a bearing is provided, the first brake cover is attached to the motor bracket, and the brake is attached to the first brake cover. It is characterized by.
The method for manufacturing the motor series according to claim 5 excludes the motor with a brake according to claim 4 and the motor with a brake except for the second brake cover, the brake, and the first brake cover. It is a method of manufacturing a motor series including a motor with a second brake in which a second brake different from the brake is attached to the motor bracket, the process of manufacturing the motor with the brake, and the brake. It is characterized in that the process of manufacturing the second motor with a brake is executed by using a motor bracket having the same shape as the motor bracket used in the motor with a brake.
The motor with a detection device according to claim 6 is divided into two, a motor frame having a motor shaft inside, a detection device for detecting the rotation of the motor shaft, and the detection device inside. A possibly formed first cover and a second cover are provided, the first cover is arranged between the motor frame and the detection device, and the second cover is The first cover is arranged on the opposite side of the detection device from the first cover, and the first cover is provided with a communication hole for communicating in the axial direction, and a lead wire connected to the detection device. Is characterized in that it passes through the communication hole and is drawn into the motor frame.

According to the motor with a brake according to claim 1, it is not necessary to remove the brake lead wire at the time of maintenance of the brake. Therefore, the maintenance work of the brake becomes easy.
Further, according to the motor with a brake according to claim 2, the brake portion is exposed from the first brake cover by removing the second brake cover during the maintenance work of the brake. Therefore, the maintenance work of the brake becomes easier.
Further, according to the motor with a brake according to claim 3, the armature of the brake portion is exposed from the first brake cover by removing the second brake cover during the maintenance work of the brake. Therefore, the maintenance work of the brake becomes easier.
Further, according to the motor with a brake according to claim 4, the motor shaft is supported by the motor bracket even if the brake, the first brake cover, and the second brake cover are removed at the time of maintenance or replacement of the brake. Therefore, the motor unit is not disassembled. Therefore, maintenance work and replacement work are facilitated.
Further, according to the method for manufacturing a motor series according to claim 5, it can be stocked as a motor module excluding the brake, the first brake cover, and the second brake cover, and can be stocked as a motor module in a state where the brake, the first brake cover, and the second brake cover are removed, according to the user's request. Therefore, the motor with a brake with the first and second brake covers and the motor with a brake without the brake cover can be selected and manufactured, so that the productivity is good. In addition, since the motor shaft and motor bracket can be shared, it is possible to select a motor with a brake according to the type of brake with a configuration that has a large cost reduction effect.
Further, according to the motor with a detection device according to claim 6, it is not necessary to remove the lead wire at the time of maintenance of the detection device. Therefore, the maintenance work of the detection device becomes easy.

It is explanatory drawing of the motor with a brake which does not have a waterproof mechanism in 1st Embodiment. It is explanatory drawing of the motor with a brake provided with the waterproof mechanism in 1st Embodiment. It is an exploded perspective view of a motor series including a motor equipped with a waterproof mechanism. It is explanatory drawing of the motor with an encoder in 2nd Embodiment.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described with reference to the drawings.

[Explanation of motor with brake]
FIG. 1 is an explanatory diagram of a motor with a brake (with a deceleration mechanism) that does not have a waterproof mechanism, and only the brake portion shows a cross section. The motor 1A with a brake has a tubular motor frame 2, a gear head 4 connected to one end side (load side, right side in FIG. 1) of the motor frame 2 in the axial direction via a gear bracket 3, and a motor frame 2. The fan cover 6A connected to the other end side (reverse load side, left side of FIG. 1) via the motor bracket 5, and the brake 8A provided between the motor bracket 5 and the fan 7 in the fan cover 6A. It includes a terminal box 9 installed on the outer peripheral surface of the motor frame 2.

A motor composed of a stator and a rotor (not shown) is housed inside the motor frame 2, and a motor shaft 10 coupled to the rotor is interposed via bearings 11 and 11 held by the gear bracket 3 and the motor bracket 5, respectively. It is rotatably supported around the axis C0. The end of the motor shaft 10 protruding toward the load side meshes with the input side of a reduction mechanism (not shown) provided in the gear head 4. The output shaft 12 of the reduction mechanism protrudes from the gear head 4.

The motor bracket 5 is formed with a first series of through holes 37 in the axial direction, and the brake 8A has a plurality of bolts 13, 13 on the motor bracket 5 so that the brake field 14 closes the first series of through holes 37.・ ・ It is fixed by. The brake 8A has a brake field 14 having a ring-shaped recess opened on the counterload side, a brake coil 16 housed in the brake field 14 and electrically connected to the brake lead wire 15, and the anti of the brake field 14. It is equipped with an armature 17 arranged on the load side. A ring-shaped side plate 18 is fixed to the surface of the brake field 14 on the opposite load side via a spacer (not shown). The gap between the side plate 18 and the brake field 14 can be adjusted by a gap adjusting screw (not shown). The armature 17 is supported so as to be movable in the axial direction in a state where the outer circumference is engaged with the bolt 13 and rotation is restricted, but the armature 17 is urged toward the side plate 18 side by a coil spring (not shown) provided in the brake field 14. Has been done. A gap is provided between the outer periphery of the motor bracket 5 and the fan cover 6A, and the brake lead wire 15 is drawn out of the fan cover 6A through this gap.

A keyway 22 is formed in the axial direction at the end of the motor shaft 10 on the opposite load side. The end of the motor shaft 10 on the opposite load side protrudes into the fan cover 6A, and a disc-shaped brake disc 19 is provided between the armature 17 and the side plate 18, and the brake disc 19 is used as the brake hub 20A. Is integrally coupled to the end of the motor shaft 10 on the opposite load side in the rotational direction. The brake hub 20A is a tubular body having a plurality of flat surfaces on the outer periphery of which the center hole of the brake disc 19 is fitted, and a through hole 21 is formed in the center of the brake hub 20A so as to be fitted into a gap at the end of the motor shaft 10. ing. A key groove corresponding to the key groove 22 of the motor shaft 10 is formed on the inner surface of the through hole 21. Further, screw holes 23 and 24 are formed on the outer periphery of the brake hub 20A so as to be aligned in the axial direction of the brake hub 20A, and each communicate with a key groove on the inner surface.

In the brake hub 20A, with the end of the motor shaft 10 fitted and inserted into the through hole 21, the key 25 is fitted across the key groove 22 and the key groove on the inner surface of the through hole 21, and the screw hole is formed. By pressing the set screw 26 screwed from the 23 against the key 25, the key is integrally connected to the motor shaft 10. The brake hub 20A penetrates the center of the brake field 14, the armature 17, the side plate 18, and the brake disc 19 of the brake 8A and projects to the counterload side.

A fan 7 is coupled to the tip of the brake hub 20A projecting to the counterload side via an extension shaft 27A. The extension shaft 27A has a set screw 28 screwed from the screw hole 24 locked in a recess provided at one end of the extension shaft 27A with one end fitted in the through hole 21 of the brake hub 20A. Then, with the other end protruding, it is integrally coupled with the motor shaft 10 via the brake hub 20A. Then, the fitting hole 29 of the fan 7 is fitted to the other end of the protrusion, and the set screw 30 screwed from between the blades of the fan 7 toward the center on the outside thereof is engaged with the other end of the extension shaft 27A. By stopping it, it will be integrally coupled with the fan 7.

In the motor 1A with a brake configured as described above, the armature 17 in the OFF state moves to the counterload side by the urging of the coil spring and presses the brake disc 19 against the side plate 18. Therefore, the motor shaft 10 is in a state of being braked via the brake disc 19 and the brake hub 20A. Here, when the power is turned on by power supply, the brake coil 16 is supplied with power via the brake lead wire 15 and an attractive force due to an electromagnetic force is generated in the brake coil 16, so that the armature 17 moves to the load side against the urging of the coil spring. Moves away from the brake disc 19. Therefore, the rotor from which the braking of the motor shaft 10 is released rotates, and the output shaft 12 decelerates and rotates via the deceleration mechanism.

Since an intake port (not shown) is formed in the portion of the fan cover 6A facing the fan 7, when the fan 7 rotates with the rotation of the motor shaft 10, air is introduced into the fan 7 in the fan cover 6A. Guided to the outer peripheral side, the surface of the motor frame 2 and the surface of the gear head 4 are cooled through the gap between the outer periphery of the motor bracket 5 and the fan cover 6A.

[Description of a motor with a brake equipped with a waterproof mechanism]
FIG. 2 shows a motor 1B with a brake to which a waterproof mechanism is added. Here, a short cylindrical waterproof spacer 31 that holds the brake field 14 and covers the outside of the brake 8B is bolted to the surface on the opposite load side of the motor bracket 5, and the contact surface between the motor bracket 5 and the waterproof spacer 31 is fixed. Is provided with an O-ring 32. An oil seal 33 is provided on the load side of the motor bracket 5 at the penetrating portion of the motor shaft 10.

Further, on the opposite side of the waterproof spacer 31, the waterproof cover 34 covering the brake 8B is bolted, and an O-ring 35 is also provided between the waterproof spacer 31 and the waterproof cover 34. The split surface 36 of the waterproof spacer 31 and the waterproof cover 34 is located at a position overlapping the brake field 14 when viewed from a direction perpendicular to the axis C0 of the motor shaft 10. The waterproof spacer 31 is provided with a second communication hole 38 in the axial direction at a position overlapping with the first series through hole 37 of the motor bracket 5, and the brake lead wire 15 is provided with the second communication hole 38 and the first series through hole 38. It is drawn into the motor frame 2 through the hole 37. By closing the gap between the second communication hole 38 and the first series hole 37 and the brake lead wire 15 with a rubber bush or the like as necessary, wear debris or the like generated from the brake 8B invades the inside of the motor frame 2. You can prevent it from happening. Further, the brake lead wire 15 drawn into the motor frame 2 passes through the inside of the motor frame 2 and is connected to the terminal block (not shown) provided inside the terminal box 9 together with the lead wire of the stator. ing.

As shown in FIG. 3, the brake hub 20B here is formed to be longer in the axial direction than the brake hub 20A used in the motor 1A with a brake, and the extension shaft 27B also has an intermediate portion penetrating the waterproof cover 34. It is provided and is long in the axial direction. Further, the brake 8B is formed to be smaller in the radial direction and thicker in the axial direction than the brake 8A used in the motor 1A with a brake.

An oil seal 39 is provided at a portion of the extension shaft 27B that penetrates the waterproof cover 34, and a V ring 40 is externally provided between the waterproof cover 34 and the fan 7, and the waterproof spacer 31 and the waterproof cover are provided. With 34, it has a waterproof structure that prevents water and the like from entering the brake 8B portion. The fan cover 6B is formed longer (deeper) in the axial direction than the fan cover 6A of the motor 1A with a brake.

As shown in FIG. 3, the motor 1B with a brake provided with a waterproof mechanism has a fan cover 6B, a brake 8B, a brake hub 20B, a waterproof spacer 31, a waterproof cover 34, and an extension shaft 27B with a brake. It is the same as the motor 1A. Therefore, when manufacturing a motor series including a brake-equipped motor 1A and a brake-equipped motor 1B provided with a waterproof mechanism, the process of manufacturing the brake-equipped motor 1A (brake at the end of the motor shaft 10). A process of attaching the hub 20A and the extension shaft 27A, assembling the brake 8A on the non-load side of the motor bracket 5, attaching the fan 7 to the extension shaft 27A and covering the fan cover 6A), and the motor 1B with a brake equipped with a waterproof mechanism. Manufacturing process (Brake hub 20B and extension shaft 27B are attached to the end of the motor shaft 10, the waterproof spacer 31, brake 8B, and waterproof cover 34 are assembled on the opposite load side of the motor bracket 5, and the fan 7 is attached to the extension shaft 27B. The process of attaching and covering the fan cover 6B) may be performed.

As described above, according to the method for manufacturing the motor series of the above embodiment, the motor frame 2, the gear bracket 3, the gear head 4, the motor bracket 5, and the motor shaft 10 can be shared, so that the minimum motor portion is used as a module. Can be in stock. For example, for an order for a motor with a brake that does not require a waterproof mechanism, it will be completed by executing the process of manufacturing the motor with a brake 1A, and for an order for a motor with a brake that requires a waterproof mechanism, the motor with a brake 1B It is completed by executing the process of manufacturing. Therefore, it is possible to respond to a short delivery time in terms of manufacturing, and it is possible to realize a selection between a motor with a brake not provided with a waterproof mechanism and a motor with a brake provided with a waterproof mechanism in a configuration having a large cost reduction effect.

Further, according to the motor 1B with a brake provided with a waterproof mechanism, the brake lead wire 15 is the motor frame 2 through the second communication hole 38 provided in the waterproof spacer 31 and the first series through hole 37 provided in the motor bracket 5. Since it is pulled into the inside of the brake lead wire 15, it is not necessary to remove the brake lead wire 15 even when maintaining the brake gap. Therefore, the maintenance work becomes easy.

Further, according to the motor 1B with a brake provided with a waterproof mechanism, the brake portion is exposed from the end surface of the waterproof spacer 31 by removing the waterproof cover 34 at the time of maintenance of the brake 8B. Therefore, the maintenance work of the brake 8B becomes easier.

Further, according to the motor 1B with a brake provided with a waterproof mechanism, the split surface 36 of the waterproof spacer 31 and the waterproof cover 34 overlaps with the brake field 14 when viewed from the direction perpendicular to the axis C0 of the motor shaft 10. It is in. Therefore, by removing the waterproof cover 34 during maintenance of the brake 8B, the armature 17 is exposed from the end surface of the waterproof spacer 31. Therefore, the maintenance work of the brake 8B becomes easier.

Further, according to the motor 1A with a brake and the motor 1B with a brake provided with a waterproof mechanism, the motor shaft 10 is pivotally supported by the gear bracket 3 and the motor bracket 5 via the bearing 11. Therefore, even when the brake 8A, the brake 8B, and the waterproof spacer 31 are removed during maintenance such as replacement of brake parts, the motor shaft 10 is held by the motor bracket 5, so that the motor unit can be used. You can work without being disassembled.

[Second Embodiment]
Next, the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an explanatory diagram of the motor 1C with an encoder according to the second embodiment, and is a drawing corresponding to FIG. 2. The structure of the motor 1C with an encoder in the second embodiment is different from that in the first embodiment in that the encoder 41 is provided instead of the brake 8B. Since the configuration of the motor 1C with an encoder other than the above is the same as that of the motor 1B with a brake in the first embodiment described above, detailed description thereof will be omitted.

In the motor 1C with an encoder, an encoder 41 for detecting the rotation of the motor shaft 10 is attached to the outer peripheral surface of the brake hub 20B. The encoder 41 is fixed to the waterproof spacer 31 by a screw 43, and the lead wire 42 of the encoder 41 is drawn into the motor frame 2 through the second communication hole 38 and the first series through hole 37. The lead wire 42 drawn into the motor frame 2 passes through the inside of the motor frame 2 and is connected to a terminal block (not shown) provided inside the terminal box 9 together with the lead wire of the stator. Further, as shown in FIG. 3, the motor 1B with a brake can be changed to the motor 1C with an encoder by removing the brake 8B from the motor 1B with a brake and attaching an encoder 41 instead.

Also in the second embodiment, the same effect as that of the first embodiment is obtained. According to the motor 1C with an encoder of the above-described embodiment, the lead wire 42 of the encoder 41 is inside the motor frame 2 through the second communication hole 38 provided in the waterproof spacer 31 and the first series of through holes 37 provided in the motor bracket 5. Therefore, it is not necessary to remove the lead wire 42 when removing the waterproof cover 34 at the time of maintenance of the encoder 41. Therefore, the maintenance work becomes easy.

[Correspondence of Configuration between the Present Invention and the Embodiment]
The braked motor 1A of the present embodiment is an example of the second braked motor of the present invention. The motor 1C with an encoder of the present embodiment is an example of the motor with a detection device of the present invention. The brake 8A of the present embodiment is an example of the second brake of the present invention. The waterproof spacer 31 of the present embodiment is an example of the first brake cover and the first cover of the present invention. The waterproof cover 34 of the present embodiment is an example of the second brake cover and the second cover of the present invention. The second communication hole 38 of the present embodiment is an example of the communication hole of the present invention. The encoder 41 of the present embodiment is an example of the detection device of the present invention.

1A, 1B Motor with brake 1C Motor with encoder 2 Motor frame 5 Motor bracket 8A, 8B Brake 10 Motor shaft 11 Bearing 14 Brake field 15 Brake lead wire 16 Brake coil 31 Waterproof spacer 34 Waterproof cover 36 Divided surface 37 First series of holes 38 Second communication hole 41 Encoder 42 Lead wire C0 Axis center

Claims (6)

A motor frame with a motor shaft inside and
A brake for braking the motor shaft and
The first brake cover and the second brake cover, in which the brake is housed and is formed so as to be divisible into two,
Equipped with
The first brake cover is arranged between the motor frame and the brake.
The second brake cover is arranged on the side opposite to the first brake cover with the brake interposed therebetween.
The first brake cover is provided with a communication hole that communicates in the axial direction.
A motor with a brake, wherein a brake lead wire connected to the brake passes through the communication hole and is drawn into the motor frame. The first aspect of claim 1, wherein the divided surface between the first brake cover and the second brake cover is located at a position overlapping the brake when viewed from a direction perpendicular to the axis of the motor shaft. Motor with brake. The brake has a brake field with a built-in brake coil.
1. The motor with a brake according to 2. A motor bracket arranged between the motor frame and the first brake cover and rotatably supporting the motor shaft via bearings is provided.
The first brake cover is attached to the motor bracket, and the first brake cover is attached to the motor bracket.
The motor with a brake according to any one of claims 1 to 3, wherein the brake is attached to the first brake cover. A second brake different from the brake is applied to the motor bracket except for the braked motor according to claim 4 and the second brake cover, the brake, and the first brake cover from the braked motor. A method of manufacturing a motor series including a second braked motor attached.
The process of manufacturing the motor with brake and
A process of manufacturing the second braked motor by using a motor bracket having the same shape as the motor bracket used in the braked motor.
A method of manufacturing a motor series characterized by performing. A motor frame with a motor shaft inside and
A detection device that detects the rotation of the motor shaft, and
The first cover and the second cover, in which the detection device is housed and are formed so as to be divisible,
Equipped with
The first cover is arranged between the motor frame and the detection device.
The second cover is arranged on the side opposite to the first cover with the detection device interposed therebetween.
The first cover is provided with a communication hole that communicates in the axial direction.
A motor with a detection device, wherein the lead wire connected to the detection device passes through the communication hole and is drawn into the motor frame.

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