JP2008199702A - Electric motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric motor for which the man-hours of assembling work can be reduced by allowing an electric cord pulled out from a stator to hold a cord clamp in advance. <P>SOLUTION: The cord clamp 30 is provided with a plate-like clamp body 31 having a cord pressing surface formed on one surface; a cord pressing plate 32 having one end of a width direction coupled to one end of the width direction of the clamp body through a hinge 33 on the cord pressing surface side of the clamp body, and provided so as to be movable between a closed position where it opposes the cord pressing surface of the clamp body 31 and an opened position where it evacuates from the cord pressing surface; and a locking mechanism 34 having paired mating portions provided on the other end side of the width directions of the clamp body and the cord pressing plate and mating with each other, and utilizing the mating of the mating pair to lock the cord pressing plate 32 in a state where it is positioned on the closed position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric motor such as a brushless DC motor.

  Generally, an electric motor includes a stator and a rotor, and the stator is fixed to a frame of the electric motor. In addition, the rotor is supported such that its rotation shaft is rotatable with respect to the frame. The frame of the electric motor includes a casing, an end plate, and the like.

  From the electric motor, a plurality of electric cords (electric wires in which core wires are insulated) connected to the armature coils and sensors are drawn out. For example, in a three-phase brushless DC motor, three electric cords connected to the armature coils and six electric cords connected to position sensors provided for the three-phase armature coils are drawn. These electric cords are drawn out in a state of being clamped by a cord clamp fixed to the frame of the electric motor.

  As a cord clamp used for an electric motor, what was shown by patent documents 1 is known. As shown in FIGS. 5A to 5C, this cord clamp has a concave portion 1a that accommodates an electric cord on the back side, and plate-like clamps that have attachment holes 1b and 1b at both ends in the width direction. A main body 1 and a cord presser plate 3 connected to the clamp main body 1 via a hinge portion 2 are provided. As shown in FIG. 5 (C), the cord presser plate 3 centered on the hinge portion 2 is in an open position where it is retracted from the recess 1a on the back surface of the clamp body 1, and the clamp body within the recess 1a of the clamp body. It is possible to rotate between the closed position where it is opposed to.

When this cord clamp is used, electric cords (not shown) are accommodated side by side in the recesses 1a of the clamp body 1, and then the cord presser plate 3 is rotated around the hinge portion 2 so that the cord presser plate 3 The electric cord in the recess 1a is pressed. In this state, the cord holding plate 3 is directed to the frame side of the electric motor (not shown), and the clamp body 1 is fastened to the frame with screws passing through the mounting holes 1b and 1b. Clamp in a state of being sandwiched between the presser plate 3.
JP 2000-323866 A

  The conventional cord clamp shown in FIG. 5 is a stage where the electric cord is accommodated in the recess 1a of the clamp body 1 and the electric cord is pressed by the cord presser plate 3, and the clamp body is fastened to the frame of the electric motor. Since it is fixed to the electric cord for the first time, it could not be attached in advance to the electric cord drawn from the stator. Therefore, it is necessary to perform an operation of assembling the electric cord to the cord clamp when performing the operation of assembling the electric motor by attaching the stator and the rotor to the frame, which increases the man-hours for assembling the electric motor and increases the manufacturing cost. was there.

  An object of the present invention is to provide an electric motor capable of holding a cord clamp in an electric cord in advance, thereby reducing the number of assembling operations and reducing the manufacturing cost. It is in.

  The present invention includes a stator fixed to a frame, a rotor rotatably supported by the frame, and a cord clamp fixed to the frame, and a plurality of electric cords drawn to the outside are cord clamps. The electric motor clamped by is intended.

  The cord clamp used in the present invention includes a plate-like clamp body having a cord pressing surface formed on one surface, and one end in the width direction of the clamp body on the cord pressing surface side of the clamp body via a hinge portion. A cord presser plate provided so as to be able to rotate between a closed position where it is coupled to the cord presser surface of the clamp body and an open position where it is retracted from the cord presser surface, and a clamp A lock provided on the other end in the width direction of the main body and the cord presser plate and having a pair of meshing portions that mesh with each other, and locks the cord presser plate in the closed position by the meshing of the pair of meshing portions Mechanism. The cord clamp is fixed to the frame in a state in which a plurality of electric cords are arranged in the width direction of the clamp body and sandwiched between the cord press surface of the clamp body and the cord press plate locked in the closed position. .

  If comprised as mentioned above, a cord clamp will be made into an electric cord beforehand by pinching a plurality of electric cords between a cord holding surface of a clamp body, and a cord holding plate, and locking a cord holding plate in a closed position by a lock mechanism. The assembly work efficiency of the rotating electrical machine can be reduced by eliminating the work of assembling the cord clamp to the electric cord when assembling the motor by attaching the stator and rotor to the frame. Can be improved.

  In a preferred aspect of the present invention, attachment holes are provided at both ends in the width direction of the clamp body and the cord presser plate so as to align with each other when the cord presser plate is positioned at the closed position, and the cord clamp is locked at the closed position. The cord presser plate is placed in contact with the clamp mounting surface of the frame and fastened (coupled in a tightened state) to the frame by a fastener passing through the mounting hole.

  In another aspect of the present invention, the cord clamp includes a cord clamp attachment portion of the frame (a portion provided on the frame side as a portion for attaching the cord clamp) and a member disposed opposite to the cord clamp attachment portion. The cord clamp is fastened to the frame by being disposed in a state of being sandwiched between the members, and being disposed so as to face the cord clamp attachment portion and being fastened to the cord clamp attachment portion of the frame.

  In another preferred aspect of the present invention, when the clamp body is fastened to the frame, the cord is pressed into at least one of the cord pressing surface of the clamp body and the surface of the cord pressing plate facing the clamp body, and the electric cord is cut into the insulation coating. A protrusion for restraining the cord is formed.

  If the protrusion is formed on at least one of the cord pressing surface of the clamp body and the surface of the cord pressing plate facing the clamp body as described above, the electric cord can be reliably clamped.

  In another preferred aspect of the present invention, in a state before the cord clamp is fastened to the frame, a gap formed between the clamp body and the cord presser plate locked in the closed position is formed between the cord clamp and the electric cord. Shows a size that allows relative displacement along the longitudinal direction of the electric cord in between, and clamps the cord clamp to the frame by sandwiching the electric cord between the clamp body and the cord presser plate locked in the closed position In this case, the hinge portion and the lock mechanism are configured so that the gap is reduced to a size that clamps the electric cord between the clamp body and the cord presser plate.

  That is, the electric cord is not clamped only by locking the cord presser plate in the closed position with the electric cord sandwiched between the clamp main body and the cord presser plate, and it is the first time when the clamp main body is fastened to the frame of the motor. The electric cord is clamped between the clamp body and the cord presser plate.

  When configured as described above, the lead size of the electric cord can be adjusted immediately before the cord clamp is fastened to the frame. When the cord clamp is held by the electric cord, the position of the cord clamp is strictly Since there is no need to define, the assembly work of the electric motor can be facilitated. In addition, when configured as described above, when an external force is applied to the cord clamp during the assembly process, the cord clamp can move relative to the electric cord. Therefore, an external force is applied to the cord clamp during the assembly process. This eliminates the possibility of the electric cord being disconnected when it is damaged.

  According to the present invention, the cord clamp can be held by the electric cord only by sandwiching a plurality of electric cords between the cord pressing surface of the clamp body and the cord pressing plate and locking the cord pressing plate in the closed position by the lock mechanism. Therefore, when the electric cord is pulled out from the stator, the cord clamp can be held by the electric cord. When assembling the motor, the work of assembling the cord clamp to the electric cord can be omitted. Work efficiency can be improved.

  In particular, according to the invention described in claim 5, the electric cord is not clamped only by locking the cord presser plate in the closed position by sandwiching the electric cord between the clamp body and the cord presser plate. Only when the main body is fastened to the frame of the electric motor, the electric cord can be clamped between the clamp main body and the cord presser plate. Accordingly, the lead size of the electric cord can be adjusted immediately before the cord clamp is fastened to the frame. When the cord clamp is held on the electric cord, the position of the cord clamp does not need to be strictly determined. Assembly work can be facilitated. In addition, when configured as described above, when an external force is applied to the cord clamp during the assembly process, the cord clamp can move relative to the electric cord. Therefore, an external force is applied to the cord clamp during the assembly process. This eliminates the possibility of the electric cord being disconnected when it is damaged.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 1 is a front view showing a configuration example of an electric motor according to the present invention with a part cut away, and FIGS. 2A to 2C are a front view, a bottom view, and a CC of a cord clamp according to the present invention, respectively. It is line sectional drawing. FIG. 3 is a cross-sectional view for explaining the lock mechanism used in the present embodiment, and FIGS. 4A and 4B are views in which the cord presser plate of the cord clamp according to the present invention is located in the open position. It is a front view and a bottom view.

  FIG. 1 shows an example in which the present invention is applied to an outer rotor type three-phase brushless DC motor 10. In FIG. 1, 11 is a cylindrical casing having one end in the axial direction closed by an end wall, and 12 is a cup. A flange portion 12b formed on the other end side in the axial direction of the casing 11 (opening end portion side), and a flange portion 12b protruding outward from the opening end of the cover main body 12a. An end cover 13 fastened to (not shown) is a cord clamp mounting plate fixed to the opening end of the casing 11. In this example, the casing 11, the end cover 12, and the cord clamp mounting plate 13 are arranged. Thus, a frame of the electric motor is configured.

  A stator 15 includes an annular multipolar star armature core 16 and an armature coil 17 wound around the salient pole portion of the armature core 16 and connected in a three-phase manner. The stator 15 is configured such that the annular yoke portion 16y of the armature core 16 is fastened to the end wall of the casing 11 by a through bolt (not shown) penetrating the mounting hole 16a provided in the yoke portion 16y. It is fixed to the casing 11.

  Reference numeral 18 denotes a rotor. The illustrated rotor includes a cup-shaped rotor yoke 19, a plurality of permanent magnets 20 attached to the inner periphery of the rotor yoke 19 at equal angular intervals, and a rotating shaft 21 attached to the center of the rotor yoke 19. It has. The rotating shaft 21 is rotatably supported by bearings (not shown) held by bearing holding portions respectively provided on the end wall of the casing 11 and the end cover 12.

  22u to 22w are electric cords connected to the three-phase armature coils, and (23u1, 23u2) to (23w1, 23w2) are position sensors hu to hw (not shown) provided for the three-phase armature coils. It is an electric cord drawn from Each position sensor is composed of a Hall IC that detects the polarity of the magnetic pole of the rotor, for example, and outputs a signal indicating a different level depending on whether the polarity of the detected magnetic pole is the S pole or the N pole.

  The electric cords 22u to 22w and (23u1, 23u2) to (23w1, 23w2) are clamped by the cord clamp 30 according to the present invention attached to the cord clamp mounting plate 13 and fixed to the frame of the motor. .

  As shown in FIGS. 2 to 4, the cord clamp 30 includes a clamp main body 31, a cord presser plate 32, a hinge portion 33 that connects the clamp main body 31 and the cord presser plate 32, and a cord presser plate 32. And a locking mechanism 34 that locks. Each part constituting the cord clamp 30 is integrally formed by injection molding an insulating resin.

  The clamp body 31 is made of a plate-like member, and the contour shape of the cross section thereof is such that one of the long sides a1 and a2 of the rectangular opposite side is curved into an outwardly convex arc shape, The corners on both ends of the long side part a1 are cut off to form a substantially convex shape in which L-shaped cutout parts a3 and a3 having obtuse angles are formed (see FIG. 2B). .

  In this specification, in each part of the cord clamp 30, a direction along the straight long side a2 (X direction in the figure), a direction along the short side (Y direction in the figure) along the contour of the cross section of the clamp main body 31, and A direction perpendicular to both (Z direction in the figure) is defined as a width direction, a depth direction, and a thickness direction of each part. Of the side surfaces of each part of the cord clamp, the surface facing the same side as the end surface A1 on the arc-shaped long side a1 side of the clamp body is the front surface of each part of the cord clamp, and the same as the end surface A2 on the other long side a2 side The side facing the surface is the back of each part of the cord clamp.

  Flat cord presser plate contact surfaces 31a0 and 31a0 'located on the same plane are formed in the vicinity of both ends in the width direction of one surface 31a of the clamp body, which forms one end face in the thickness direction of the clamp body 31. The first cord pressing surface 31a1 slightly projecting from the abutting surfaces 31a0 and 31a0 'and the second cord pressing surface further projecting from the first cord pressing surface 31a1 31a2 are formed side by side in the width direction of the clamp body. The width dimension of the first cord pressing surface 31a1 is set so that the three electric cords 22u to 22w drawn from the armature coil can be arranged side by side, and the width dimension of the second cord pressing surface 31a2 is a position sensor. The six electrical cords (23u1, 23u2) to (23w1, 23w2) drawn out from are set so as to be arranged side by side.

  On the other surface 31b side of the clamp body that forms the end face on the other end side in the thickness direction of the clamp body 31, a standing wall 31c extending along the long side portion a1 curved in an arc shape is formed. As shown in FIG. 1, the curvature of the standing wall 31 c is set equal to the curvature of the peripheral wall portion of the cover body 12 a of the end cover 12 of the electric motor 10 to which the cord clamp 30 is attached.

  The cord presser plate 32 is made of a plate having a cross-sectional contour shape similar to that of the clamp body. Clamp body abutting surfaces 32a0 and 32a0 'that abut against the code pressing plate abutting surfaces 31a0 and 31a0' of the clamp body 31 are formed at both ends in the width direction of the surface of the cord pressing plate 32 that faces the clamp body 31. Between these contact surfaces, shallow recesses 32a1 and 32a2 corresponding to the cord pressing surfaces 31a1 and 31a2 of the clamp body are formed. The recesses 32a1 and 32a2 are partitioned by a rib-shaped partition wall 32b.

  As shown in FIG. 4, one end in the width direction of the cord pressing plate 32 is coupled to one end in the width direction of the clamp body 31 on the side of the cord pressing surfaces 31 a 1 and 31 a 2 of the clamp body 31 via a hinge portion 33. ing. The hinge portion 33 is formed of a deformable connecting piece that connects one end in the width direction of the clamp body 31 and one end in the width direction of the cord pressing plate 32 at the center portion in the width direction of the cord clamp 30. A closed position where the plate 32 is opposed to the cord pressing surface of the clamp body 31 as shown in FIG. 2 around the hinge 33, and a state where the plate 32 is retracted from the cord pressing surface as shown in FIG. It can be rotated between the open position.

  The lock mechanism 34 includes a pair of meshing portions 34a and 34b which are provided on the other end side in the width direction of the clamp body 31 and the cord presser plate 32 and mesh with each other, and the cord is formed by meshing the pair of meshing portions 34a and 34b. The presser plate 32 can be locked in the closed position. In the present embodiment, as shown in FIG. 3, the engagement portion 34 a on the clamp body side is constituted by the protrusion formed in the opening of the recess 31 d provided on the contact surface 31 a 0 of the clamp body 31, and the clamp body A meshing portion 34b on the cord presser plate 32 side is constituted by a claw portion formed at the tip of a projection 32d provided on the contact surface 32a0 of the cord presser plate 32 so as to correspond to the concave portion 31d.

  In the present embodiment, attachment holes 31e and 32e are provided at both ends in the width direction of the clamp body 31 and the cord presser plate 32 to align with each other when the cord presser plate 32 is positioned at the closed position.

  In the present embodiment, when the clamp body 41 is fastened to the frame of the electric motor, rib-shaped protrusions that bite into the insulation coating of the electrical cord sandwiched between the clamp body and the cord presser plate and restrain the electrical cord. 31 f is formed on the cord pressing surface of the clamp body 31.

  As shown in FIG. 2, when the cord clamp 30 is attached to the electric cord, among the electric cords drawn from the stator 15, the electric cords 22 u to 22 w drawn from the armature coil are cord clamped. The electric cords (23 u 1, 23 u 2) to (23 w 1, 23 w 2) arranged on the concave portion 32 a 1 of the cord presser plate 32 in the state of being arranged in the width direction of the cord 30, It arrange | positions on the recessed part 32a2 of the cord pressing board 32 in the state arranged in the direction. Next, the clamp main body 31 and the cord presser plate 32 are relatively rotated so that the cord presser plate 32 is positioned at the closed position, and the engagement portions 34a and 34b of the lock mechanism 34 are engaged with each other, thereby the clamp main body 31 is engaged. The cord presser plate 32 is locked in the closed position with a plurality of electric cords sandwiched between the cord presser surface and the cord presser plate 32. As a result, the cord clamp 30 is held by the electric cord drawn from the stator 15.

  The cord clamp 30 held by the electric cord is fastened to the frame of the motor by a fastener (usually a screw) provided in the clamp body 31 and the cord presser plate 32 and passing through the mounting holes 31e and 32e aligned with each other. To do.

  In the example shown in FIG. 1, the cord pressing plate 32 faces the cord clamp mounting plate 13 side, and the front surface of the cord clamp 30 is exposed to the outside through a window portion 12 d formed in a part of the peripheral wall portion of the end cover 12. Then, the cord clamp 30 is arranged on the cord clamp mounting plate 13, and the clamp body 31 and the cord presser plate 32 are fastened to the cord clamp mounting plate 13, thereby fixing the cord clamp 30 to the cord clamp mounting plate 13. ing.

  As described above, the cord clamp 30 used in the present invention has a plurality of electric cords sandwiched between the cord pressing surface of the clamp body 31 and the cord pressing plate 32 and locks the cord pressing plate in the closed position by the lock mechanism. Since the cord clamp can be held in advance by the electric cord, when the assembling work for assembling the electric motor by attaching the stator 15 and the rotor 18 to the frame, the work for assembling the electric cord to the cord clamp 30 is omitted. The assembly man-hours can be reduced, and the assembly work efficiency of the rotating electrical machine can be improved.

  In the cord clamp of this embodiment, when the clamp body 31 is in a state before being fastened to the cord clamp mounting plate (frame) 13, as shown in FIG. The cord along the longitudinal direction of the electric cord is between the cord holding plate 32 (to be precise, between the cord holding surface of the clamp body 31 and the bottom surface of the concave portion of the cord holding plate 32 locked in the closed position). The gaps d1 and d2 are formed to allow the displacement of the clamp, and the electric cord is sandwiched between the clamp body 31 and the cord presser plate 32 locked in the closed position, and the attachment holes 31e and 32e are penetrated. When the cord clamp 30 is fastened to the motor frame with a fastener (not shown) (not shown), the electric cord between the clamp body 31 and the cord presser plate 32 is clamped. The hinge portion 33 and the lock mechanism 34 are configured to allow the gaps d1 and d2 to be reduced to the size to be ramped. In a state where the cord clamp 30 is fastened to the frame of the electric motor, the entire cord pressing surfaces 31a1, 31a2 of the clamp body 31 are in contact with the electric cords 22u-22w and (23u1, 23u2)-(23w1, 23w2), respectively. While pressing the cord against the cord pressing plate 32, the rib-like protrusion 31f bites into the insulating coatings of the electric cords 22u to 22w and (23u1, 23u2) to (23w1, 23w2), thereby strengthening these electric cords. Clamp to

  The adjustment of the gaps d1 and d2 appropriately sets the length of the connecting piece constituting the hinge part and the distance between the meshing part 34b constituting the lock mechanism 34 and the contact surface 32a0 of the cord pressing plate 32. Can be done. The gaps d1 and d2 are appropriately set according to the diameter of the electric cord to be clamped.

  When configured as described above, the cord presser plate 31 is placed in the closed position with the electric cords 22u to 22w and (23u1, 23u2) to (23w1, 23w2) sandwiched between the clamp body 31 and the cord presser plate 32. The electric cord is not clamped only by being locked, and the electric cord is clamped between the clamp body and the cord presser plate only when the cord clamp is fastened to the frame of the electric motor. Therefore, the lead size of the electric cord can be adjusted immediately before the cord clamp is fastened to the frame, and when the cord clamp is held by the electric cord, it is not necessary to determine the position of the cord clamp strictly. Assembly work can be facilitated. In addition, when configured as described above, when an external force is applied to the cord clamp during the assembly process, the cord clamp can move relative to the electric cord. Therefore, an external force is applied to the cord clamp during the assembly process. This eliminates the possibility of the electric cord being disconnected when it is damaged.

  In this embodiment, since the diameters of the electric cords 22u to 22w drawn from the armature coil are larger than the diameters of the electric cords (23u1, 23u2) to (23w1, 23w2) drawn from the position sensor, d1> d2. Is set. When the diameters of the plurality of electric cords to be clamped are all equal, it is not necessary to form the two cord pressing surfaces of the first cord pressing surface 31a1 and the second cord pressing surface 31a2, and all of them are formed on one surface of the clamp body. It is only necessary to form one cord pressing surface that is wide enough to cover the electric cord.

  In the above example, in order to clamp two types of electric cords having different diameters, the two cord pressing surfaces 31a1, 31a1, 31a0 ′ having different protruding heights from the cord pressing plate contact surfaces 31a0, 31a0 ′ are provided on one surface of the clamp body. 31a2 is provided, but the entire cord pressing surface provided on the clamp body is formed flat (by one plane), and the depths of the recesses 32a1 and 32a2 provided on the cord pressing plate 32 side are accommodated inside each. You may make it vary according to the diameter of a cord.

  In the above description, the cord clamp 30 is fastened (coupled in the clamped state) to the motor frame (in the above example, the cord clamp mounting plate) with a fastener such as a screw having a mounting hole penetrated. The cord clamp used in the invention may be fastened to the frame of the motor in a state where the clamp body and the cord presser plate are tightened in a direction approaching each other, and is limited to the case where the cord clamp is fastened to the frame with a screw or the like. Not.

  For example, a cord clamp is disposed in a state of being sandwiched between a cord clamp mounting portion of a frame of an electric motor and a member disposed to face the cord clamp mounting portion, and the member disposed to face the cord clamp mounting portion is a frame. The cord clamp may be fastened to the frame by being fastened to the cord clamp mounting portion. For example, in FIG. 1, the cord clamp 30 is sandwiched between the end wall of the end cover 12 and the cord clamp mounting plate 13, and the end cover 12 is fastened to the casing 11. It may be fastened to 13 (to the frame of the electric motor).

  In the above example, most of the one surface of the clamp body 31 is the cord pressing surface, but the cord pressing surface only needs to be formed on at least a part of the clamp body. A cord pressing surface may be formed. For example, a concave portion is formed on one surface of the clamp body 31, and a projection similar to the rib-shaped projection 31f provided in the above embodiment is provided in the concave portion so that the end surface of the projection serves as a cord pressing surface. May be.

  In the above example, in order to ensure the clamping of the electric cord, the rib-shaped protrusion 31f is provided on the cord pressing surface of the clamp body, and this protrusion is clamped on the cord pressing surface of the clamp body and the cord pressing plate. The protrusion may be provided on at least one of the surfaces facing the main body, and the protrusions may be provided on the surface of the cord pressing plate 32 facing the clamp main body (in the above example, the bottom surfaces of the recesses 32a1 and 32a2). It may be provided on both the surface and the surface of the cord pressing plate facing the clamp body.

  Also, if the electrical cord can be clamped simply by sandwiching the electrical cord between the cord holding surface provided on one side of the clamp body and the cord holding plate, omit the protrusion that bites into the insulation coating of the electrical cord Can do.

It is the front view which notched and showed one structural example of the electric motor concerning embodiment of this invention. (A)-(C) are the front view, bottom view, and CC sectional view taken on the line of the cord clamp concerning this invention, respectively. It is sectional drawing for demonstrating the locking mechanism used by this embodiment. (A) And (B) is the front view and bottom view in the state which respectively located the cord presser plate of the cord clamp concerning this invention in the open position. (A)-(C) are the top view, the front view, and the right view in the state where the cord presser plate of the conventional cord clamp was located in the open position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Motor casing 12 End cover 13 Cord clamp mounting plate 15 Stator 18 Rotor 22u-22w Electrical cord 23u1-23w1, 23u2-23w2 Electrical cord 30 Cord clamp 31 Clamp body 31a1, 31a2 Cord pressing surface 31f Projection 32 Cord pressing plate 33 Hinge Part 34 locking mechanism 34a, 34b meshing part

Claims (5)

A stator fixed to the frame, a rotor rotatably supported by the frame, and a cord clamp fixed to the frame, and a plurality of electric cords drawn to the outside are clamped by the cord clamp In the motor that is
The cord clamp is
A plate-like clamp body with a cord holding surface formed on one side;
A closed position where one end in the width direction is coupled to one end in the width direction of the clamp body via a hinge portion on the side of the cord pressing surface of the clamp body, and the cord is opposed to the cord pressing surface of the clamp body. A cord presser plate provided so as to be able to rotate between an open position where it is retracted from the presser surface;
A state in which the clamp body and the cord presser plate are provided at the other end in the width direction and have a pair of meshing portions that mesh with each other, and the cord presser plate is positioned at the closed position by the meshing of the meshing portions of the pair A locking mechanism for locking to
Comprising
The cord clamp is fixed to the frame in a state in which the plurality of electric cords are arranged in the width direction of the clamp body and sandwiched between the clamp body and a cord presser plate locked in the closed position. That
An electric motor characterized by At both ends in the width direction of the clamp body and the cord presser plate, there are provided attachment holes that align with each other when the cord presser plate is positioned at the closed position,
The cord clamp is fastened to the frame by a fastener that is disposed in a state where the cord press plate locked in the closed position is in contact with the clamp mounting surface of the frame and penetrates the mounting hole. The electric motor according to claim 1. The cord clamp is disposed in a state of being sandwiched between a cord clamp mounting portion of the frame and a member disposed to face the cord clamp mounting portion, and the member disposed to face the cord clamp mounting portion is The cord clamp is fastened to the frame by being fastened to the cord clamp mounting portion of the frame;
The electric motor according to claim 1. When the clamp body is fastened to the frame at least one of the cord pressing surface of the clamp body and the surface of the cord pressing plate facing the clamp body, the electric cord is restrained by biting into the insulation coating of the electrical cord. A protrusion is formed,
The electric motor according to claim 1, 2, or 3. In a state before the cord clamp is fastened to the frame, a gap formed between the clamp main body and the cord presser plate locked in the closed position is a length of the electric cord between the cord clamp and the electric cord. A size that allows relative displacement along a direction, and when the cord clamp is fastened to the frame by sandwiching an electric cord between the clamp body and a cord presser plate locked in a closed position; The hinge portion and the lock mechanism are configured such that the gap is reduced to a size that clamps the electric cord between the clamp body and the cord presser plate;
The electric motor according to claim 1, 2, 3, or 4.

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