CN115244793A

CN115244793A - Cable clamp and motor

Info

Publication number: CN115244793A
Application number: CN202080097984.3A
Authority: CN
Inventors: 政井勇辉; 长谷川治之
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2022-10-25
Also published as: WO2022054162A1; JP6880349B1; DE112020006429T5; KR20220125376A; KR102502907B1; JPWO2022054162A1

Abstract

A cable clamp (23A) is mounted on an integrated connector (22) connected to a 1 st signal line group composed of a plurality of signal lines arranged inside a motor (100), the cable clamp (23A) comprising: an insertion unit (231) that inserts a cable (24) containing a 2 nd signal line group composed of a plurality of signal lines from an opening (51) and pulls out the 2 nd signal line group from an opening (52); and a connecting part (230A) which accommodates the 2 nd signal line group pulled out from the insertion part (231) and, if attached to the integrated connector (22), connects the 1 st signal line group and the 2 nd signal line group pulled out from the insertion part (231), wherein the 2 nd signal line group in the connecting part (230A) is bent from the direction in which the cable (24) is inserted to the direction in which the connecting part (230A) is attached to the integrated connector (22).

Description

Cable clamp and motor

Technical Field

The present invention relates to a cable clamp connected to a cable and a motor.

Background

The motor includes a detector for detecting a rotational position of the rotor required for rotation of the control shaft, and a power line for rotating the rotor. The signal line of the detector and the power line for rotating the rotor are drawn out from different connectors by the motor, but since a plurality of motors are used in the apparatus, it takes a long time for the wiring process when wiring the connectors for the signal line and the connectors for the power line, respectively. Therefore, there is a method of implementing wire saving by using an integrated cable in which a power line and a signal line are integrated and an integrated connector in which a connector for a signal line and a connector for a power line are integrated.

The integrated cable described in patent document 1 is configured such that a shielded power line in which a power line is covered with a shield layer and a shielded signal line in which a signal line is covered with a shield layer are accommodated in an insulating sheath, whereby the power line and the signal line are integrated.

Patent document 1: japanese patent laid-open publication No. 61-171010

Disclosure of Invention

However, in the technique of patent document 1, when the integrated cable is connected to a control circuit that controls the motor, the integrated cable may have to be bent depending on the arrangement relationship between the motor and the control circuit. In the case where the integrated cable is thick due to the above-described situation, it is difficult to bend the integrated cable, and the routing property of the integrated cable is deteriorated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cable clamp capable of preventing deterioration of the routing property of an integrated cable when the integrated cable is connected to a motor.

In order to solve the above-described problems and achieve the object, the present invention provides a cable jig to be attached to an integral connector connected to a 1 st signal line group including a plurality of signal lines arranged inside a motor, the cable jig including: and an insertion unit that inserts a cable, which houses a 2 nd signal line group including a plurality of signal lines, from the 1 st opening and pulls out the 2 nd signal line group from the 2 nd opening. The cable holder of the present invention includes a connecting portion that receives the 2 nd signal line group drawn out from the insertion portion and connects the 1 st signal line group and the 2 nd signal line group drawn out from the insertion portion if the cable holder is attached to the integral connector. The 2 nd signal line group in the connection portion is bent from the direction in which the cable is inserted to the direction in which the connection portion is attached to the integrated connector.

ADVANTAGEOUS EFFECTS OF INVENTION

The cable clamp according to the present invention has an effect that, when the integrated cable is connected to the motor, the integral cable can be prevented from being deteriorated in winding property.

Drawings

Fig. 1 is a diagram showing a structure of a motor to which a cable clamp according to embodiment 1 is connected.

Fig. 2 is a perspective view showing a 1 st configuration example of the cable clamp according to embodiment 1.

Fig. 3 is a perspective view showing a configuration example 2 of the cable clamp according to embodiment 1.

Fig. 4 is a perspective view showing a 3 rd configuration example of the cable clamp according to embodiment 1.

Fig. 5 is a side view showing a configuration example 3 of the cable clamp according to embodiment 1.

Fig. 6 is a view showing the structure of the motor of comparative example 1.

Fig. 7 is a diagram showing the structure of the motor of comparative example 2.

Fig. 8 is a diagram showing the structure of the motor of comparative example 3.

Fig. 9 is a diagram showing the structure of a motor of comparative example 4.

Fig. 10 is a sectional view showing a connection structure of the cable of comparative example 1 to the motor.

Fig. 11 is a perspective view showing a connection structure of the cable of comparative example 1 to the motor.

Fig. 12 is a perspective view showing a 1 st configuration example of the cable clamp according to embodiment 2.

Fig. 13 is a perspective view showing a configuration example 2 of the cable clamp according to embodiment 2.

Fig. 14 is a perspective view showing a configuration example of the cable clamp according to embodiment 3.

Fig. 15 is a perspective view showing a configuration example of the cable clamp according to embodiment 4.

Detailed Description

Hereinafter, a cable holder and a motor according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following embodiments, the shaft of the motor is defined as the X-axis, and 2 axes orthogonal to each other and 2 axes in a plane perpendicular to the shaft of the shaft are defined as the Y-axis and the Z-axis. In the following description, the direction in which the shaft extends, i.e., the load side, is defined as the positive X direction. In the following description, the negative Z direction is set to the lower side of the motor, and the positive Z direction is set to the upper side of the motor.

Embodiment 1.

Fig. 1 is a diagram showing a structure of a motor to which a cable clamp according to embodiment 1 is connected. Fig. 1 shows a cross-sectional view of the motor 100 when the motor 100 is cut along an XZ plane including the center axis of the shaft 1.

The motor 100 is connected to a control circuit (not shown) having an inverter via a cable 24, and operates in accordance with a command from the control circuit. Motor 100 has integrated connector 22, which is a composite connector in which detector communication line 10 and motor power line 6 are integrated. The detector communication line 10 is a signal line connected to a detector 12 that detects the rotational position of the rotor 15, and transmits a signal from the detector 12 to the control circuit. The motor power line 6 is a signal line for transmitting a signal from the control circuit to the stator core 4.

The motor 100 includes a shaft 1, a load-side bearing 2, a load-side bracket 3, a plate spring 16, a stator core 4, a frame 5, and a rotor 15 made of a magnet or the like. Further, the motor 100 includes a plurality of motor power lines 6, an opposite-load side bracket 7, a plurality of detector communication lines 10, a detector cover 11, a detector 12 having a detector circuit 13, and an opposite-load side bearing 14. Further, the motor 100 has a cable clamp 23A and a cable 24.

Among the electric motor 100, the shaft 1, the load-side bearing 2, the load-side bracket 3, the leaf spring 16, the stator core 4, the frame 5, the rotor 15, the motor power line 6, the no-load side bracket 7, the plurality of detector communication lines 10, the detector cover 11, the detector 12, and the no-load side bearing 14 are main body portions of the electric motor 100. The integral connector 22, the cable holder 23A, and the cable 24 in the motor 100 are connection members connected to the main body.

In the motor 100, a part of the shaft 1, the stator core 4, the frame 5, the rotor 15, and a part of the motor power line 6 are housed in a cylindrical frame 5.

In the motor 100, the load-side bracket 3 is disposed at the positive X-direction end of the frame 5, and the opposite-load-side bracket 7 is disposed at the negative X-direction end of the frame 5.

The load side bearing 2 and the leaf spring 16 are disposed between the load side bracket 3 and the frame 5. A counter-load side bearing 14 is disposed between the counter-load side bracket 7 and the frame 5. A detector 12 is attached to the non-load side of the non-load side bracket 7.

The stator core 4 is cylindrical in the X direction in the axial direction. The rotor 15 is cylindrical in the X-direction in the axial direction, and is disposed inside the stator core 4. The rotor 15 is connected to the shaft 1, and when the rotor 15 rotates, the shaft 1 rotates about the X direction as a rotation axis.

The shaft 1 is rotatably supported by a load side bearing 2 in the vicinity of a load side bracket 3. The load side bearing 2 is fixed to the load side bracket 3 via a leaf spring 16.

The shaft 1 is rotatably supported by a load-opposing-side bearing 14 at one end, that is, in the vicinity of the detector 12. The other end of the shaft 1 is connected to a load arranged in the positive X direction.

One end of the motor power wire 6 is connected to the stator core 4. The other end of the motor power line 6 is pulled out from the opposite-to-load side of the frame 5, and the opposite-to-load side bracket 7 is passed through and connected to the integrated connector 22.

The detector 12 is disposed on one end portion side, which is the opposite load side of the shaft 1. The detector 12 is fixed to the frame 5 via the non-load-side bracket 7. The detector 12 detects the rotational position of the rotor 15 using the detector circuit 13.

The detector communication line 10 has one end connected to the detector 12 and the other end connected to the integral connector 22. The detector cover 11 is disposed on the opposite side of the detector 12 from the load. The detector cover 11 is fixed to the opposite-load side bracket 7 so as to accommodate a part of the detector 12, the detector communication line 10, and the motor power line 6.

The other end of the detector communication line 10 and the other end of the motor power line 6 extend to a pull-out opening provided between the detector cover 11 and the opposite-load side bracket 7, and are connected to an integral connector 22 provided at the pull-out opening.

When the cable 24 is connected to the motor 100, the cable holder 23A connected to the cable 24 is attached to the integral connector 22.

The integrated connector 22 is a connector to which the 1 st signal line group including a plurality of signal lines arranged inside the motor 100 is connected. The 1 st signal line group in embodiment 1 includes a motor power line 6 and a detector communication line 10.

The cable 24 accommodates a 2 nd signal line group including a plurality of signal lines. The signal lines housed in the cable 24 are each connected to a signal line included in the 1 st signal line group.

The integral connector 22 has a male pin portion 70P, and the male pin portion 70P has a plurality of male pins. Fig. 1 shows a case where the boss pin portion 70P includes boss pins 73P and 74P as connector pins. The integral connector 22 includes a wiring 71P as a signal line connected to the boss pin 73P, and a wiring 72P as a signal line connected to the boss pin 74P.

In fig. 1, only 2

wires

71P and 72P are illustrated as wires in the integral connector 22, but wires corresponding to the number of motor power lines 6 and detector communication lines 10 are arranged in the integral connector 22. Further, a boss pin is connected to each wire in the integral connector 22.

One end of the wire 71P is connected to the boss pin 73P, and the other end is connected to the motor power line 6. One end of wiring 72P is connected to boss pin 74P, and the other end is connected to detector communication line 10.

The cable clamp 23A includes: an insertion portion 231 having an insertion port for the cable 24; and a connection portion 230A attached to the integral connector 22 and connected to the integral connector 22. The cable clamp 23A is formed using a resin molded product.

The insertion portion 231 has 2 openings, and the cable 24 is inserted through the opening 51 serving as the 1 st opening, and the wires 81Q and 82Q serving as signal lines included in the cable 24 are pulled out through the opening 52 serving as the 2 nd opening. Wires 81Q and 82Q drawn out from insertion portion 231 extend inside connection portion 230A. Opening 53, which is the 3 rd opening of integral connector 22, will be described later.

The connection portion 230A is engaged with the insertion portion 231. The connection portion 230A has 2 openings, and the wires 81Q and 82Q are inserted from the opening 54 as the 4 th opening, and the opening 55 as the 5 th opening is connected to the integral connector 22.

The

wires

71P and 72P have a recessed pin portion 80Q, and the recessed pin portion 80Q has a plurality of recessed pins. Fig. 1 illustrates a case where the recessed pin portion 80Q includes recessed

pins

83Q and 84Q. The

wires

71P and 72P include a wire 81Q as a signal wire connected to the female pin 83Q and a wire 82Q as a signal wire connected to the female pin 84Q. The wires 81Q and 82Q are disposed in the cable clamp 23A so as to pass through the insertion portion 231 and the connection portion 230A.

In fig. 1, only 2 wires 81Q and 82Q are illustrated as wires in the cable holder 23A, but wires corresponding to the number of motor power lines 6 and detector communication lines 10 are arranged in the cable holder 23A. Concave pins are connected to the respective wires in the cable clamp 23A.

One end of the wire 81Q is connected to the concave pin 83Q, and the other end is inserted into the cable 24. One end of wire 82Q is connected to concave pin 84Q, and the other end is inserted into cable 24. That is, the wires 81Q and 82Q are drawn out from the cable 24 in the insertion portion 231. The wires 81Q, 82Q are bent from the Z direction to the X direction in the cable clamp 23A.

The female pin 83Q is connected to the male pin 73P at the connection portion of the connection portion 230A and the integral type connector 22, and the female pin 84Q is connected to the male pin 74P at the connection portion of the connection portion 230A and the integral type connector 22.

The female pin portion 80Q is detachable from the male pin portion 70P, and if the cable clamp 23A is attached to the integrated connector 22, the female pin 83Q is connected to the male pin 73P, and the female pin 84Q is connected to the male pin 74P. Thus, the line 81Q is connected to the line 71P, and the line 82Q is connected to the line 72P.

As described above, if the connection portion 230A accommodates the wires 81Q and 82Q pulled out from the insertion portion 231 and the cable clamp 23A is attached to the integral connector 22, the wires 81Q and 82Q pulled out from the insertion portion 231 are connected to the

wires

71P and 72P.

In fig. 1, the case where the connection position of the concave pin portion 80Q and the convex pin portion 70P is the connection surface of the cable clamp 23A and the integrated connector 22 has been described, but the connection position of the concave pin portion 80Q and the convex pin portion 70P may be the inside of the integrated connector 22. The extending direction of the protruding pins 73P, 74P is not limited to the negative X direction shown in fig. 1, and may be another direction. The cable holder 23A may have

male pins

73P, 74P, and the integrated connector 22 may have

female pins

83Q, 84Q. The line 71P and the line 81Q may be connected by a structure other than that shown in fig. 1, and the line 72P and the line 82Q may be connected by a structure other than that shown in fig. 1.

In fig. 1, the case where motor 100 includes motor power line 6 and detector communication line 10 has been described, but motor 100 may include a brake line connected to a brake for stopping rotation of rotor 15, a thermistor line for detecting a temperature in motor 100, and the like. In this case, the wiring connected to the brake wire, the wiring connected to the thermistor wire, and the like are arranged in the cable clamp 23A and the integrated connector 22.

The cable 24 can be connected to the motor 100 in various ways from any direction. For example, as shown in fig. 1, it is sometimes desirable to connect the cable 24 to the motor 100 from the positive Z direction, and it is sometimes desirable to connect the cable 24 to the motor 100 from the negative X direction. Therefore, in embodiment 1, as shown in the cable clamp 23A, the wiring drawn out from the cable 24 is bent in a specific direction in the connection portion 230A.

As described above, in the cable clamp 23A, the signal line group, which is the wiring drawn out from the cable 24, is bent in the connection portion 230A from the 1 st direction, which is the direction in which the cable 24 is inserted, to the 2 nd direction, which is the direction in which the connection portion 230A is attached to the integral connector 22. In the case of the cable clamp 23A, the negative Z direction is the 1 st direction, and the positive X direction is the 2 nd direction.

In embodiment 1, a cable clamp having a structure different from that of the cable clamp 23A is also prepared. That is, various cable jigs such as a cable jig having a wiring bent from the negative Y direction to the positive X direction in a state of being attached to the integrated connector 22 and a cable jig having a wiring bent from the positive Y direction to the positive X direction are prepared. In addition, a cable clamp having a wiring extending in the X direction without being bent in a state of being attached to the integral connector 22 may be prepared. The structure of the cable clamp other than the cable clamp 23A will be described later.

When the cable 24 is connected to the motor 100 by the user, the cable holder corresponding to the extending direction of the cable 24 is selected by the user from various cable holders such as the cable holder 23A and attached to the integral connector 22. Thus, the user can connect the cable 24 to the integral connector 22 without bending the cable 24 with respect to the cable 24 extending in a specific direction.

The cable clamp 23A shown in fig. 1 is a 1 st configuration example of the cable clamp according to embodiment 1. Fig. 2 is a perspective view showing a 1 st configuration example of the cable clamp according to embodiment 1. Fig. 2 shows a state where the cable clamp 23A is attached to the integral connector 22 by a screw 41.

The connection portion 230A has a shape in which a part of a rectangular parallelepiped is cut off, for example. The connection portion 230A is cut away at a portion where the screw 41 is inserted.

The cable clamp 23A is attached to the integral connector 22 so as to be connected to the integral connector 22 at a rear surface parallel to the YZ plane and facing the positive X direction. That is, the cable clamp 23A is attached to the integral connector 22 such that the plane of the connecting portion 230A on which the

concave pins

83Q and 84Q are disposed is parallel to the YZ plane. In this state, the cable clamp 23A is connected to the integral connector 22 on 1 of the 6 surfaces of the rectangular parallelepiped, that is, on the rear surface parallel to the YZ plane, and the other 5 surfaces are not connected to the integral connector 22.

In a state where the cable clamp 23A is attached to the integral connector 22, the insertion portion 231 is positioned on the upper surface 42 of the connection portion 230A, i.e., a surface parallel to the XY plane facing the positive Z direction. In the state where the cable clamp 23A is attached to the integral connector 22, the opening 51, which is the insertion port of the insertion portion 231, faces the positive Z direction.

As described above, the cable holder 23A is configured to connect the cable 24 extending in the negative Z direction and the integral connector 22.

The cable holder 23A may be configured to connect the integral connector 22 and the cable 24 extending in the positive Z direction. In this case, in a state where the cable clamp 23A is attached to the integral connector 22, the insertion portion 231 is located on the lower surface 43 of the connection portion 230A, that is, a surface parallel to the XY plane facing the negative Z direction. In addition, in the state where the cable clamp 23A is attached to the integral connector 22, the opening 51 of the insertion portion 231 faces the negative Z direction.

The cable holder 23A may be configured to connect the integral connector 22 and the cable 24 extending in the positive X direction. In this case, in a state where the cable clamp 23A is attached to the integral connector 22, the insertion portion 231 is located on the front surface 44 of the connection portion 230A, i.e., a surface parallel to the YZ plane facing the negative X direction. In addition, in the state where the cable clamp 23A is attached to the integral connector 22, the opening 51 of the insertion portion 231 faces the negative X direction.

Fig. 3 is a perspective view showing a configuration example 2 of the cable clamp according to embodiment 1. Fig. 3 shows a state in which the cable clamp 23B is attached to the integral connector 22 by a screw 41.

The cable clamp 23B has a connection portion 230B and an insertion portion 231. The connector 230B bends the cable 24 extending in the negative Y direction in the positive X direction in the connector 230B. That is, in the case of the cable clamp 23B, the negative Y direction is the 1 st direction, and the positive X direction is the 2 nd direction.

The cable clamp 23B is also attached to the integral connector 22 so as to be connected to the integral connector 22 at the rear surface parallel to the YZ plane, similarly to the cable clamp 23A.

In a state where the cable clamp 23B is attached to the integral connector 22, the insertion portion 231 is positioned on the left surface 45 of the connection portion 230B, i.e., a surface parallel to the XZ surface facing the positive Y direction. In the state where the cable clamp 23B is attached to the integral connector 22, the opening 51 of the insertion portion 231 faces the positive Y direction.

As described above, the cable holder 23B is configured to connect the cable 24 extending in the negative Y direction and the integral connector 22.

Fig. 4 is a perspective view showing a 3 rd configuration example of the cable clamp according to embodiment 1. Fig. 5 is a side view showing a configuration example 3 of the cable clamp according to embodiment 1. Fig. 4 and 5 show a state in which the cable clamp 23C is attached to the integral connector 22 by a screw 41.

The cable clamp 23C has a connecting portion 230C and an insertion portion 231. The connector 230C bends the cable 24 extending in the positive Y direction in the positive X direction in the connector 230C. That is, in the case of the cable clamp 23C, the positive Y direction is the 1 st direction, and the positive X direction is the 2 nd direction.

The cable clamp 23C is also attached to the integral connector 22 so as to be connected to the integral connector 22 at the rear surface parallel to the YZ plane, similarly to the cable clamp 23A.

In a state where the cable clamp 23C is attached to the integral connector 22, the insertion portion 231 is located on the right surface 46 of the connection portion 230C, i.e., a surface parallel to the XZ surface facing the negative Y direction. In the state where the cable clamp 23C is attached to the integral connector 22, the opening 51 of the insertion portion 231 faces the negative Y direction.

As described above, the cable holder 23C is configured to connect the integral connector 22 and the cable 24 extending in the positive Y direction.

The cable clamps 23A to 23C may be configured such that the opening 51 of the insertion portion 231 faces in any direction when attached to the integrated connector 22. For example, the cable clamp 23A may be a cable clamp that rotates the insertion portion 231 shown in fig. 2 counterclockwise to any position from 0 degree to 180 degrees when viewed from the negative Y direction with an axis parallel to the Y axis as a rotation axis.

Further, the cable clamp 23B may be a cable clamp that rotates the insertion portion 231 shown in fig. 3 clockwise to any position from 0 degrees to 360 degrees when viewed from the negative X direction with an axis parallel to the X axis as a rotation axis.

Further, if the cable clamps 23A to 23C are on the side of the connection surfaces of the cable clamps 23A to 23C and the integral connector 22, cable clamps having the insertion portions 231 directed in arbitrary directions may be used as the cable clamps 23A to 23C.

The cable clamps 23A to 23C and the integral connector 22 may be connected to the surfaces other than the connection surfaces of the cable clamps 23A to 23C and the integral connector 22 shown in fig. 2 to 4. That is, the cable clamps 23A to 23C can be connected to any surface if they are exposed to the outside of the outer wall surface of the integral connector 22.

For example, when the connection surfaces of the cable clamps 23A to 23C and the integral connector 22 shown in fig. 2 to 4 are the rear surface of the integral connector 22, the cable clamps 23A to 23C may be connected to the integral connector 22 on any one of the rear surface, the left surface, the right surface, and the top surface of the integral connector 22. In this case, if the cable clamps 23A to 23C are located on the side of the connection surfaces of the cable clamps 23A to 23C and the integral connector 22, the cable clamps that have the insertion portions 231 oriented in any direction may be the cable clamps 23A to 23C.

The integral connector 22 may be configured to be attachable to and detachable from the main body of the motor 100. In this case, the integral connector 22 can change the mounting direction so that the opening 53 as the 3 rd opening for mounting the cable clamp faces the direction in which the load is arranged or the direction opposite to the direction in which the load is arranged in the direction parallel to the shaft portion of the shaft 1.

Thus, the cable 24 extending in any direction can be connected to the motor 100 without bending the cable 24. By using any of the cable clamps 23A to 23C whose shapes are changed from the cable clamp 23X described later, the direction in which the cable 24 is drawn can be changed without changing the shape of the integrated connector 22.

The structure of the comparative motor will be described here. Fig. 6 is a diagram showing the structure of the motor of comparative example 1, and fig. 7 is a diagram showing the structure of the motor of comparative example 2. Fig. 6 and 7 show cross-sectional views of the

motors

101 and 102 when the

motors

101 and 102 are cut off on an XZ plane including the central axis of the shaft 1. Of the components shown in fig. 6 and 7, those that perform the same function as the cable clamp 23A shown in fig. 1 are given the same reference numerals, and redundant description thereof is omitted.

The motor 101 is different from the motor 100 in that a cable clamp 23X is provided instead of the cable clamp 23A. The cable clamp 23X is connected to the motor power line 6 and the detector communication line 10 via the integrated connector 22.

The cable clamp 23X includes an insertion portion 231 and a connection portion 230X. The connection portion 230X includes a wiring 81X connected to the concave pin 83Q and a wiring 82X connected to the concave pin 84Q. The

wires

81X and 82X are disposed in the cable holder 23X so as to pass through the insertion portion 231 and the connection portion 230X. Unlike the lines 81Q and 82Q, the

lines

81X and 82X penetrate the insertion portion 231 without being bent.

Thus, in the motor 101, the opening 56 of the insertion portion 231 faces the negative X direction. If the cable 24 is attached to the motor 101 via the cable clamp 23X, the cable 24 extends from the motor 101 in the negative X direction.

The motor 102 has a brake 17 for stopping rotation of the rotor 15. Further, the motor 102 includes a brake wire 18, which is a signal wire connected to the brake 17, in addition to the motor power wire 6 and the detector communication wire 10. Further, the motor 102 has a cable clamp 23X as in the motor 101.

The cable clamp 23X of the motor 102 is connected to the motor power line 6, the detector communication line 10, and the brake line 18 via the integral connector 22.

In the motor 102, the opening 56 of the insertion portion 231 is oriented in the negative X direction, similarly to the motor 101. If the cable 24 is attached to the motor 102 via the cable clamp 23X, the cable 24 extends from the motor 102 in the negative X direction.

Fig. 8 is a diagram showing a structure of a motor of comparative example 3, and fig. 9 is a diagram showing a structure of a motor of comparative example 4. Fig. 8 and 9 show cross-sectional views of the

motors

103 and 104 when the

motors

103 and 104 are cut off on an XZ plane including the central axis of the shaft 1. In fig. 8 and 9, the cable clamp is not shown. Of the components shown in fig. 8 and 9, those that perform the same function as the cable clamp 23A shown in fig. 1 are given the same reference numerals, and redundant description thereof is omitted.

The

motors

103 and 104 are different from the motors 100 to 102 in that they have a plurality of connectors instead of the integral connector 22.

The motor 103 has a power line connector 32 connected to the motor power line 6 and a detector communication line connector 31 connected to the detector communication line 10. As described above, in the motor 103, the motor power line 6 and the detector communication line 10 are pulled out by different connectors. In the motor 103, a cable clamp is connected to the power line connector 32 and the detector communication line connector 31.

The power line connector 32 includes a plurality of wires connected to the motor power line 6, and a protruding pin disposed at each of the distal ends of the wires. The detector communication line connector 31 includes a plurality of wires connected to the detector communication line 10, and a protruding pin disposed at each of the distal ends of the wires.

The motor 104 also has a brake 17 for stopping the rotation of the rotor 15 in addition to the function of the motor 103. Further, the motor 104 includes a brake wire 18, which is a signal wire connected to the brake 17, in addition to the motor power wire 6 and the detector communication wire 10. The motor 104 includes a power line connector 32, a detector communication line connector 31, and a brake power supply connector 33 connected to the brake line 18, instead of the integral connector 22. As described above, in motor 104, motor power line 6, detector communication line 10, and brake line 18 are pulled out by different connectors. In the motor 104, a cable clamp is connected to the power line connector 32, the detector communication line connector 31, and the brake power supply connector 33.

The brake power connector 33 includes a plurality of wires connected to the brake wires 18, and a boss pin disposed at each of the distal ends of the wires.

In the motor 100 of embodiment 1 having the integrated connector 22, the manufacturing cost of the motor 100 can be reduced by reducing the number of connectors and the number of steps for attaching the connectors can be reduced as compared with the

motors

103 and 104.

In the

motors

101 and 102, the wiring connected to the detector communication line 10 and the wiring connected to the motor power line 6 are bundled and stored in the 1 cable 24. Therefore, when the cable 24 is bent and wound, the type of the cable 24 that can be used in the motor 101 is limited due to characteristics such as the hardness of the cable 24.

For example, when the cable 24 is extended in a direction other than the negative X direction with respect to the

motors

101 and 102, the cable 24 needs to be bent. Here, a connection structure in the case where the cable 24 is connected to the

motors

101 and 102 will be described. Since the connection structure of the cable 24 to the

motors

101 and 102 is the same, the connection structure of the cable 24 to the motor 101 will be described here.

Fig. 10 is a sectional view showing a connection structure of the cable of comparative example 1 with respect to the motor, and fig. 11 is a perspective view showing the connection structure of the cable of comparative example 1 with respect to the motor.

The cable clamp 23X is attached to the integral connector 22. The cable holder 23X includes a plurality of

wires

81X and 82X drawn out from the cable 24, and these

wires

81X and 82X are connected to the integral connector 22. The cable holder 23X is attached to the integral connector 22 so that the

respective wires

81X and 82X extend in the positive X direction.

In the case where the direction in which the cable holder 23X is attached to the integral connector 22 is the X direction and the direction in which the cable 24 is extended is desired to be the Z direction as in the motor 101 shown in fig. 10 and 11, the cable 24 needs to be bent outside the cable holder 23X. In other words, the cable clamp 23X is attached to the integral connector 22 in a state where the cable 24 is bent in the X direction from the Z direction.

Therefore, in the motor 101, the expansion of the bent portion in the state where the cable 24 is bent becomes large, and a wide arrangement region for arranging the cable 24 is necessary. In the motor 101, if the cable 24 is forcibly bent, the life of the cable 24 may be significantly reduced or the cable may be broken.

On the other hand, in the motor 100 of embodiment 1, it is not necessary to bend the cable 24 outside the cable clamp 23X. In embodiment 1, the case where the cable clamps 23A to 23C are connected to the integral connector 22 of the motor 100 is described, but the cable clamps 23A to 23C may be connected to the integral connector 22 of the motor 102.

As described above, the cable holder 23A of embodiment 1 can be connected to the integral connector 22 without bending the cable 24 outside the cable holders 23A to 23C. Therefore, when the cable 24, which is an integral cable, is connected to the motor 100 via the integral connector 22, the cable clamp 23A can prevent the cable 24 from being deteriorated in the routing property.

The cable clamps 23A to 23C can connect the cable 24 to the motor 100 via the integral connector 22 without changing the shape of the integral connector 22. Therefore, the cable clamp 23A can easily connect the integrated cable, i.e., the cable 24, to the integrated connector 22.

Further, since the cable clamps 23A to 23C can be manufactured at a relatively low cost, the cable clamps 23A to 23C can pull out the cable 24 in any direction at a low cost. Therefore, the motor 100 having the cable 24 and any one of the cable jigs 23A to 23C can be manufactured at low cost.

Further, since the cable clamps 23A to 23C can be shared by various motors, the cost for connecting the cable 24 to the motor 100 can be reduced. Further, since the cable 24 having a plurality of integrated wires does not need to be bent outside the cable jigs 23A to 23C, the arrangement region of the cable 24 can be suppressed from increasing.

Embodiment 2.

Next, embodiment 2 will be described with reference to fig. 12 and 13. In embodiment 2, a plurality of cables 24 are connected to the integral connector 22 using a cable jig having a plurality of insertion portions.

Fig. 12 is a perspective view showing a 1 st configuration example of the cable clamp according to embodiment 2. Among the components of fig. 12, those that achieve the same function as the cable clamp 23A of embodiment 1 shown in fig. 2 are given the same reference numerals, and redundant description thereof is omitted.

The cable clamp 23D is a cable clamp connected to the integral connector 22, similarly to the cable clamp 23A. The cable clamp 23D connects the detector communication line 10 and the motor power line 6 to the

respective cables

24A, 24B.

The cable clamp 23D has 1 connecting

portion

230D and 2 insertion portions 235. The insertion portions 235 here are open in the negative X direction and are connected to the

cables

24A and 24B extending in the positive X direction. The connection portion 230D is attached to the integral connector 22 by a screw 41, similarly to the connection portion 230A. The connection portion 230D has the same internal structure as the connection portion 230A.

One insertion portion 235 of the 2 insertion portions 235 is connected to the 1 st cable, i.e., cable 24A, and the other insertion portion 235 of the 2 insertion portions 235 is connected to the 2 nd cable, i.e., cable 24B.

The cable 24A is connected to a plurality of wires in one insertion portion 235, and the cable 24B is connected to a plurality of wires in the other insertion portion 235.

The wiring in the one insertion portion 235 penetrates the inside of the connection portion 230D, and is connected to the wiring in the integrated connector 22 via the female pin and the male pin. The wiring is connected to the detector communication line 10.

The wiring in the other insertion portion 235 penetrates the inside of the connection portion 230D, and is connected to the wiring in the integrated connector 22 via the female pin and the male pin. The wiring is connected to the motor power line 6.

Fig. 13 is a perspective view showing a configuration example 2 of the cable clamp according to embodiment 2. Among the components of fig. 13, those that achieve the same function as the cable clamp 23A of embodiment 1 shown in fig. 2 are given the same reference numerals, and redundant description thereof is omitted.

The cable clamp 23E is a cable clamp connected to the integral connector 22, similarly to the cable clamp 23A. The cable clamp 23E connects the detector communication line 10, the motor power line 6, and the brake line 18 to the respective cables 24A to 24C.

The cable clamp 23E has 1 connecting

portion

230E and 3 insertion portions 235. The insertion portions 235 here are open in the negative X direction and are connected to the

cables

24A, 24B, and 24C extending in the positive X direction. The connection portion 230E is attached to the integral connector 22 by a screw 41, similarly to the connection portion 230A. The connection portion 230E has the same internal structure as the connection portion 230A.

The 1 st and 2 nd insertion portions 235 among the 3 insertion portions 235 have the same wiring structure as the 1 st and 2 nd insertion portions 235 described with reference to fig. 12. The 3 rd insertion portion 235 among the 3 insertion portions 235 is connected to the 3 rd cable, i.e., the cable 24C.

The cables 24C are connected to a plurality of wires in the 3 rd insertion portion 235. The wiring in the 3 rd insertion portion 235 penetrates the inside of the connection portion 230E, and is connected to the wiring in the integrated connector 22 via the female pin and the male pin. The wiring is connected to the brake line 18.

The wiring of each insertion portion 235 may be connected to any signal line among the signal lines drawn out from the motor 100. The insertion portion 235 may be opened in any direction as described in embodiment 1. For example, when the insertion portion 235 opens in the positive Z direction like the insertion portion 231 of the cable clamp 23A, the wiring is bent from the negative Z direction to the positive X direction in the connection portion 230E. In addition, the cable clamp 23E may also have greater than or equal to 4 insertion portions 235.

As described above, in embodiment 2, since the

cables

24A and 24B and the integral connector 22 can be connected via the cable clamp 23D having 2 insertion portions 235, the number of cables connected to the motor 100 can be changed. Similarly, since the cables 24A to 24C and the integral connector 22 can be connected via the cable clamp 23E having 3 insertion portions 235, the number of cables connected to the motor 100 can be changed.

By dividing the wiring by using the

cable jigs

23D, 23E, the diameter of each of the cables 24A to 24C is reduced, and the winding property is improved. Further, since an integrated special dedicated cable that integrates the detector communication line 10, the motor power line 6, and the like is not required, a desired cable can be selected on the user side. Further, since it is not necessary to use an integrated special dedicated cable, the cost of the cables 24A to 24C can be reduced. In addition, since a common cable can be used as the cables 24A to 24C, maintenance is facilitated.

Embodiment 3.

Next, embodiment 3 will be described with reference to fig. 14. In embodiment 3, the insertion portion of the cable clamp is configured such that a cover can be attached to the opening of the insertion portion.

Fig. 14 is a perspective view showing a configuration example of the cable clamp according to embodiment 3. Among the components of fig. 14, those that achieve the same function as the cable clamp 23A of embodiment 1 shown in fig. 2 or the cable clamp 23D of embodiment 2 shown in fig. 12 are given the same reference numerals, and redundant description thereof is omitted.

The cable clamp 23F has an insertion portion 236 instead of the insertion portion 235, compared to the cable clamp 23D. The insertion portion 236 has a structure in which the cover 25 is attached to the opening portion 57 in an open state in which the cable 24A or the cable 24B is not inserted. The opening 57 is the 1 st opening similar to the opening 51.

Further, the cable clamp 23F may have 2 insertion portions 236, and may also have 1

insertion portion

235 and 1 insertion portion 236. The cable clamp 23E may have an insertion portion 236 instead of the insertion portion 235. In this case, the cable clamp 23E may have at least 1 insertion portion 236.

As described above, in embodiment 3, the cable clamp 23F is configured such that the cover 25 can be attached to and detached from the opening 57, which is the cable drawing-out opening of the insertion portion 236 of the cable clamp 23F. This makes it possible to share the cable clamp 23F with a plurality of motors and to determine the number of cables to be used on the user side in accordance with the user's needs, thereby improving usability. In addition, since the cable clamp 23F can be used in common for a plurality of motors, the cost can be reduced.

Embodiment 4.

Next, embodiment 4 will be described with reference to fig. 15. In embodiment 4, a plurality of types of insertion portions having different sizes are arranged in the cable clamp so that a plurality of cables having different thicknesses can be connected to the motor 100.

Fig. 15 is a perspective view showing a configuration example of the cable holder according to embodiment 4. Among the components of fig. 15, those that achieve the same function as the cable clamp 23A of embodiment 1 shown in fig. 2 or the cable clamp 23D of embodiment 2 shown in fig. 12 are given the same reference numerals, and redundant description thereof is omitted.

The cable clamp 23G has

insertion portions

237 and 238 instead of the insertion portion 235, compared to the cable clamp 23D. The opening 58 of the insertion portion 237 as the 1 st insertion portion and the opening 59 of the insertion portion 238 as the 2 nd insertion portion have different widths in the opening region. That is, the thickness of the cable 24D inserted into the insertion portion 237 and the thickness of the cable 24E inserted into the insertion portion 238 are different. In fig. 15, a case where the cable 24E is thinner than the cable 24D is shown. The

openings

58 and 59 are the 1 st opening similar to the opening 51.

It is sometimes desirable to connect

cables

24D, 24E of various thicknesses to the motor 100. In embodiment 4, the desired

cables

24D and 24E can be connected to the motor 100 by using the cable clamp 23G having the

insertion portions

237 and 238 corresponding to the thickness of the

cables

24D and 24E to be connected.

In other words, the user of the motor 100 can arbitrarily select the diameters of the

cables

24D and 24E connected to the motor 100. Thus, the user of the motor 100 can select the small-diameter cable 24E as the cable connected to the motor 100. When the cable 24E having a small diameter is selected, since the winding property is improved, the arrangement region of the cable 24E can be made space-saving. In addition, the

cables

24D and 24E are universal cables or universal cable holders for the cable holder 23G, so that the cost of the motor 100 can be reduced. In addition, since a universal cable and a universal cable holder can be used, maintenance of the motor 100 is facilitated.

The wiring of each of the

insertion portions

237 and 238 may be connected to any of the signal lines drawn out from the motor 100. The

insertion portions

237 and 238 may be opened in any direction as described in embodiment 1. For example, when the

insertion portions

237 and 238 are opened in the positive Z direction similarly to the insertion portion 231 of the cable clamp 23A, the wiring is bent from the negative Z direction to the positive X direction in the connection portion 230G.

In addition, 3 or more cables may be connected to the cable clamp 23G. In this case, the cable clamp 23G is configured with 3 or more insertion portions. The 3 or more insertion portions may have different opening regions of the respective openings, or may have the same opening region of the opening of some of the insertion portions.

As described above, according to embodiment 4, since the

insertion portions

237 and 238 having different widths of the opening areas of the openings are disposed in the cable clamp 23G, a plurality of

cables

24D and 24E having various diameters can be connected to the motor 100.

The configurations shown in the above embodiments are merely examples, and may be combined with other known techniques, or may be combined with each other, and some of the configurations may be omitted or modified without departing from the scope of the invention.

Description of the reference numerals

1-axis, 2-load-side bearing, 3-load-side bracket, 4-stator core, 5-frame, 6-motor power line, 7-load-opposite-side bracket, 10-detector communication line, 11-detector cover, 12-detector, 13-detector circuit, 14-load-opposite-side bearing, 15-rotor, 16-leaf spring, 17-brake, 18-brake line, 22-integrated connector, 23A-23G, 23X cable clamp, 24A-24E cable, 25-cover, 31-detector communication line connector, 32-power line connector, 33-brake power connector, 41-screw, 42-upper surface, 43-lower surface, 44-front surface, 45-left surface, 46-right surface, 51-59 opening portion, 70-P projection pin portion, 71P, 72P, 81Q, 82Q, 81X, 82X wiring, 73P, 74-P projection pin, 80-Q recess pin portion, 83Q, 84-Q recess pin, 100-104-motor, 230A-230E, 230G, 230X connecting portion, 231, 235-238-insert portion.

Claims

1. A cable clamp is mounted to an integral connector connected to a 1 st signal line group composed of a plurality of signal lines arranged inside a motor,

the cable clamp is characterized by comprising:

an insertion unit that inserts a cable, which houses a 2 nd signal line group including a plurality of signal lines, from a 1 st opening and pulls out the 2 nd signal line group from a 2 nd opening; and

a connection part that receives the 2 nd signal line group drawn out from the insertion part and connects the 2 nd signal line group drawn out from the insertion part with the 1 st signal line group if attached to the one-piece connector,

the 2 nd signal line group in the connection portion is bent from a direction in which the cable is inserted to a direction in which the connection portion is attached to the integrated connector.

2. The cable clamp of claim 1,

the direction in which the connection portion is attached to the integral connector is a direction in which a load driven by the motor is arranged in a direction parallel to a shaft portion of a shaft of the motor, or a direction opposite to the direction in which the load is arranged.

3. The cable clamp according to claim 1 or 2,

the number of the insertion parts is a plurality of,

connecting the cable for each of the insertion portions,

the connection portion connects the 2 nd signal line group with the 1 st signal line group for each of the insertion portions.

4. The cable clamp of claim 3,

the insertion portion is configured to be able to attach and detach the cover to and from the 1 st opening portion in a state where the cable is not inserted.

5. The cable clamp according to claim 3 or 4,

the widths of the opening regions of the 1 st opening of the 1 st insertion part and the 1 st opening of the 2 nd insertion part among the plurality of insertion parts are different.

6. An electric motor which drives a load by control from a control circuit,

the motor is characterized by comprising:

a 1 st signal line group including a plurality of signal lines used in the driving;

an integral connector connected to the 1 st signal line group;

a cable clamp mounted to the integrated connector; and

a cable that houses a 2 nd signal line group composed of a plurality of signal lines and is connected to the cable holder,

the cable clamp comprises:

an insertion portion for inserting the cable from the 1 st opening and pulling out the 2 nd signal line group from the 2 nd opening; and

a connection portion that houses the 2 nd signal line group pulled out from the insertion portion and connects the 2 nd signal line group pulled out from the insertion portion with the 1 st signal line group if attached to the integral connector,

7. The motor according to claim 6,

the integral connector has a 3 rd opening for attaching the cable clamp and is detachable from the main body of the motor,

the integral connector can be changed in mounting direction so that the direction parallel to the shaft portion of the shaft of the motor at the 3 rd opening is directed in a direction in which the load is disposed or in a direction opposite to the direction in which the load is disposed.