Electromagnetic brake for electric motor

Abstract

An electromagnetic brake (10) for an electric motor comprises a brake core (14), which comprises a coil frame storage portion (54) and a connector insertion hole (52a), wherein the coil frame storage portion stores a coil frame (24), and the connector insertion hole is for inserting a connector (56), wherein the coil frame (24) has a plurality of terminal storage portions (34) on the inner side of which terminals (32) are stored, and the terminal (32) has a first contact point (44) and a second contact point (48), wherein when the terminal (32) is inserted into the terminal storage portion (34), the first contact point is connected to a winding (26) that is suspended in a suspension portion (38a, 38b) of the terminal storage portion (34), and when the terminal (32) is stored in the terminal storage portion (34), the second contact point contacts an electrode (56a) of a connector (56) that is inserted into the connector insertion hole (52a).

Description

Technical Field

[0001] The present invention relates to an electromagnetic brake of a motor driven by electromagnetic force generated when a coil is energized. Background Art

[0002] Conventionally, there is an electromagnetic brake of a motor that is driven by an electromagnetic force generated when a coil is energized (for example, Japanese Patent Application Laid-Open No. 2016-196948). Summary of the invention

[0003] In order to connect the electrode of the connector that supplies power from the external power source to the winding of the coil, it is necessary to weld the electrode and the winding, which complicates the manufacture of the electromagnetic brake.

[0004] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an electromagnetic brake for a motor that can be easily manufactured.

[0005] The form of the present invention is an electromagnetic brake of an electric motor, comprising: a coil frame, on which a winding is wound; a connector inserted from the outside, which has multiple electrodes; and a brake core, which has a coil frame storage portion and a connector insertion hole, the coil frame storage portion storing the coil frame, and the connector insertion hole for inserting the connector. In the electromagnetic brake of the electric motor, the coil frame has multiple terminal storage portions and a hanging portion, the multiple terminal storage portions store terminals on the inner side, the hanging portions are respectively arranged on any surface of the terminal storage portion, and hang the winding, the terminal has a first contact and a second contact, when the terminal is inserted into the terminal storage portion, the first contact is connected to the winding hung to the hanging portion, and when the terminal is stored in the terminal storage portion, the second contact contacts the electrode of the connector inserted into the connector insertion hole.

[0006] According to the present invention, it is possible to easily manufacture an electromagnetic brake for a motor.

[0007] The above-mentioned objects, features and advantages will be easily understood from the following description of the embodiments described with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1A and Figure 1B This is a schematic diagram of an electromagnetic brake for a motor.

[0009] Figure 2 This is a three-dimensional diagram of a coil and a brake core of an electromagnetic brake.

[0010] Figure 3 It is a three-dimensional diagram of the coil.

[0011] Figure 4 It is a three-dimensional diagram of the coil.

[0012] Figure 5A and Figure 5B It is a figure which shows the terminal storage part.

[0013] Figure 6 This is a three-dimensional diagram of the terminal.

[0014] Fig. 7A This is a diagram of the terminal viewed from the positive side in the X-axis direction. Figure 7B This is a diagram of the terminal viewed from the positive side in the Z-axis direction. Figure 7C This is a diagram of the terminal viewed from the negative side in the Y-axis direction.

[0015] Fig. 8A and Figure 8B It is a figure which shows the terminal storage part in the state which accommodated the terminal.

[0016] Fig. 9 It is a three-dimensional diagram of the brake core.

[0017] Fig.10 This is a perspective view of the brake core with the coil installed.

[0018] Fig.11 yes Fig.10 XI view in.

[0019] Fig.12 This is a perspective view of the connector.

[0020] Fig.13 This is a diagram showing a state where the connector is mounted on the brake core.

[0021] Fig.14 It is a three-dimensional diagram of the coil.

[0022] Fig.15 This is a diagram of the terminal housing portion as viewed from the negative side in the Y-axis direction.

[0023] Fig.16 This is a three-dimensional diagram of the terminal.

[0024] Fig.17A This is a diagram of the terminal viewed from the positive side in the Z-axis direction. Fig. 17B This is a diagram of the terminal viewed from the negative side in the Y-axis direction. Fig. 17C This is a diagram of the terminal viewed from the positive side in the X-axis direction.

[0025] Fig.18 It is a figure which shows the terminal storage part in the state which accommodated the terminal.

[0026] Fig.19 This is a perspective view of the connector.

[0027] Fig. 20A This is a diagram showing a state before the connector is attached to the brake core.

[0028] Fig. 20B This is a diagram showing a state where the connector is mounted on the brake core. DETAILED DESCRIPTION

[0029] [First embodiment]

[0030] Figure 1A and Figure 1B It is a schematic diagram of an electromagnetic brake 10 for a motor. Figure 1A Indicates the state where the coil 12 is not excited. Figure 1B The electromagnetic brake 10 includes the coil 12 , a brake core 14 , a spring 16 , an armature 18 , a friction plate 20 , and an end plate 22 .

[0031] When the coil 12 is not excited, the armature 18 is pushed toward the friction plate 20 side rotating integrally with the rotor of the motor by the elastic force of the spring 16. The friction plate 20 is sandwiched between the armature 18 and the end plate 22, and generates a braking torque or a holding torque on the motor.

[0032] When the coil 12 is excited, electromagnetic force is generated by the coil 12 and the brake core 14 formed of a magnetic body, and the armature 18 formed of a magnetic unit is pulled toward the coil 12. Since the armature 18 overcomes the elastic force of the spring 16 and moves toward the coil 12, the friction plate 20 is separated from the end plate 22, and the braking torque or holding torque of the motor is released.

[0033] Figure 2 It is a perspective view of the coil 12 and the brake core 14 of the electromagnetic brake 10 . Figure 3 and Figure 4 is a perspective view of the coil 12. Figure 2 to Figure 4 The coordinates of the X-axis, Y-axis, and Z-axis are indicated by arrows in the figure. These coordinates are also used in Figure 4 In the following figure description.

[0034] The coil 12 is formed by winding a winding 26 around a bobbin 24. Flanges 28 are formed on the positive and negative sides in the Z-axis direction of the bobbin 24. The winding 26 is wound between the two flanges 28 of the bobbin 24.

[0035] An extension portion 30 extending toward the negative side in the Y-axis direction is formed on the flange 28 on the positive side in the Z-axis direction of the bobbin 24. Two terminal housing portions 34 for housing the terminals 32 are provided in the extension portion 30. The two terminal housing portions 34 are arranged adjacent to each other in the X-axis direction. Figure 5A and Figure 5B It is a diagram showing the terminal housing portion 34 . Figure 5A This is a diagram of the terminal housing portion 34 as viewed from the positive side in the Z-axis direction. Figure 5B This is a diagram of the terminal housing portion 34 as viewed from the negative side in the Y-axis direction.

[0036] The terminal receiving portion 34 is formed into a square tube shape extending from the extension portion 30 toward the positive side in the Z-axis direction. Figure 3 As shown in FIG. 1 , an opening 36 for inserting the terminal 32 is provided on the positive side in the Z-axis direction. Figure 5A and Figure 5B As shown, the terminal receiving portion 34 has surfaces 34a and 34b facing each other in the X-axis direction provided with stopper portions 38a and 38b, which are formed into slit shapes extending from the opening 36 side to the negative side in the Z-axis direction.

[0037] The end 26a of one side of the winding 26 wound on the bobbin 24 is bent toward the positive side in the Z-axis direction, passes between adjacent terminal housing portions 34, further bent toward the negative side in the X-axis direction, and is hung on the hanging portion 38a and the hanging portion 38b of the terminal housing portion 34 on the negative side in the X-axis direction. The end 26a of the other side of the winding 26 wound on the bobbin 24 is bent toward the positive side in the Z-axis direction from the part wound on the bobbin 24, passes between adjacent terminal housing portions 34, further bent toward the positive side in the X-axis direction, and is hung on the hanging portion 38a and the hanging portion 38b of the terminal housing portion 34 on the positive side in the X-axis direction. The end 26a of the winding 26 is arranged to extend along the X-axis direction between the hanging portion 38a and the hanging portion 38b on the positive side in the Z-axis direction of the bottom 34e inside the terminal housing portion 34.

[0038] Electrode guides 40a and 40b are provided on surfaces 34c and 34d facing each other in the Y-axis direction of the terminal housing portion 34. The electrode guides 40a and 40b are formed in a slit shape extending from the opening 36 side of the terminal housing portion 34 toward the negative side in the Z-axis direction. Electrodes 56a of a connector 56 described later are inserted into the electrode guides 40a and 40b.

[0039] like Figure 3 As shown, the terminal 32 is inserted into the terminal receiving portion 34 from the positive side in the Z-axis direction. Figure 6 It is a perspective view of the terminal 32 . Fig. 7A This is a diagram of the terminal 32 as viewed from the positive side in the X-axis direction. Figure 7B This is a diagram of the terminal 32 as viewed from the positive side in the Z-axis direction. Figure 7C This is a diagram of the terminal 32 viewed from the negative side in the Y-axis direction. Fig. 8A and Figure 8B It is a figure which shows the terminal accommodation part 34 in the state which accommodated the terminal 32. Fig. 8A This is a diagram of the terminal housing portion 34 as viewed from the positive side in the Z-axis direction. Figure 8B This is a diagram of the terminal housing portion 34 as viewed from the negative side in the Y-axis direction.

[0040] like Fig. 7A As shown, when the terminal 32 is viewed from the positive side in the X-axis direction, a slit-shaped winding insertion portion 42 is formed in the terminal 32, and the slit-shaped winding insertion portion 42 extends from the end of the terminal 32 on the negative side in the Z-axis direction toward the positive side in the Z-axis direction. The negative side in the Z-axis direction of the winding insertion portion 42 is formed so that the width in the Y-axis direction becomes narrower toward the positive side in the Z-axis direction. The end of the winding insertion portion 42 on the positive side in the Z-axis direction constitutes a first contact 44. As shown in FIG. Fig. 8A and Figure 8B As shown, in the state where the terminal receiving portion 34 receives the terminal 32, the winding 26 disposed between the hanging portion 38a and the hanging portion 38b is inserted into the winding insertion portion 42 of the terminal 32, and the winding 26 and the terminal 32 contact at the first contact point 44. The end 26a of the winding 26 is clamped between the hanging portion 38a and the hanging portion 38b and the winding insertion portion 42 and is fixed in the terminal receiving portion 34.

[0041] like Figure 7C As shown, when the terminal 32 is viewed from the negative side in the Y-axis direction, a slit-shaped electrode insertion portion 46 is formed in the terminal 32, and the slit-shaped electrode insertion portion 46 extends from the end of the terminal 32 on the positive side in the Z-axis direction toward the negative side in the Z-axis direction. Figure 7B As shown, the width of the electrode insertion portion 46 in the X-axis direction is narrowest at the center portion of the electrode insertion portion 46 in the Y-axis direction, and this portion constitutes the second contact point 48 .

[0042] Fig. 9 It is a perspective view of the brake core 14 . Fig.10 It is a perspective view of the brake core 14 in a state where the coil 12 is mounted. Fig.11 yes Fig.10 The brake core 14 has a main body 50, a connector mounting portion 52 and a coil bobbin storage portion 54.

[0043] The main body 50 is formed in a substantially square shape when viewed from the positive side in the Z-axis direction. A connector mounting portion 52 is formed on the negative side in the Y-axis direction of the main body 50 , and a bobbin storage portion 54 is formed in the center portion of the main body 50 .

[0044] The connector mounting portion 52 is vertically arranged from the main body portion 50 toward the Z-axis direction. A connector insertion hole 52a is formed in the connector mounting portion 52 and penetrates along the Y-axis direction. Figure 2 As shown, the connector 56 is inserted into the connector insertion hole 52 a of the connector mounting portion 52 from the outside.

[0045] like Fig. 9 and Fig.10As shown, the coil frame storage portion 54 is formed in a circular groove shape. The coil frame 24 is stored in the coil frame storage portion 54. The coil frame storage portion 54 has a notch portion 54b, and the notch portion 54b is formed in a shape that is recessed relative to the surface 54a opposite to the inner peripheral surface 24a of the coil frame 24. The notch portion 54b is provided at two locations of the surface 54a and is formed to extend in the Z-axis direction.

[0046] The coil frame 24 has a protrusion 24b formed in a shape protruding relative to the inner peripheral surface 24a. The protrusion 24b is provided at two locations of the inner peripheral surface 24a corresponding to the notch 54b, and is formed to extend in the Z-axis direction. When the coil frame 24 is stored in the coil frame storage portion 54, the protrusion 24b of the coil frame 24 is inserted into the notch 54b of the coil frame storage portion 54. As a result, as Fig.11 As shown, the terminal receiving portion 34 can be positioned at a position opposite to the connector insertion hole 52 a of the connector mounting portion 52 .

[0047] The coil frame 24 has ribs 24c, and the ribs 24c are formed in a shape protruding relative to the inner peripheral surface 24a. The ribs 24c are provided at six locations of the inner peripheral surface 24a, and are formed to extend in the Z-axis direction. Since the ribs 24c fill the gap between the inner peripheral surface 24a of the coil frame 24 and the surface 54a of the coil frame storage portion 54, the coil frame 24 is suppressed from shaking in the coil frame storage portion 54.

[0048] Fig.12 : is a perspective view of the connector 56. The connector 56 has two plate-shaped electrodes 56a protruding in the Y-axis direction. The two electrodes 56a are arranged to be separated in the X-axis direction. The electrode 56a is provided so that its width direction is the Z-axis direction and its thickness direction is the X-axis direction.

[0049] Fig.13 1 is a diagram showing a state where the connector 56 is mounted on the brake core 14. The connector 56 is inserted into the connector insertion hole 52a of the connector mounting portion 52 from the negative side in the Y-axis direction toward the positive side in the Y-axis direction. When the connector 56 is inserted into the connector insertion hole 52a of the connector mounting portion 52, the electrode 56a is guided to the electrode guiding portion 40a of the terminal receiving portion 34 and inserted into the electrode insertion portion 46 of the terminal 32 inside the terminal receiving portion 34, and the electrode 56a is connected to the terminal 32 at the second contact 48. The top end of the electrode 56a passes through the electrode insertion portion 46 of the terminal 32 and is inserted into the electrode guiding portion 40b formed on the surface 34d on the positive side in the Y-axis direction of the terminal receiving portion 34. Since the electrode 56a is inserted into the electrode insertion portion 46, the movement of the terminal 32 to the positive side in the Z-axis direction is restricted, and the terminal 32 is prevented from falling off from the terminal receiving portion 34.

[0050] like Fig.11As shown, a tapered portion 40a1 is provided in an opening portion of the electrode guide portion 40a formed on the surface 34c of the terminal receiving portion 34 on the side opposite to the connector mounting portion 52. Thus, the electrode 56a is inserted into the electrode guide portion 40a along the tapered portion 40a1 and guided to the second contact point 48 of the terminal 32.

[0051] [Effects]

[0052] Conventionally, in order to connect the connector 56 and the winding 26 of the coil 12 , it is necessary to weld the electrode 56 a of the connector 56 and the winding 26 , which makes the manufacture of the electromagnetic brake 10 complicated.

[0053] In the present embodiment, the coil frame 24 provided in the electromagnetic brake 10 has a terminal housing portion 34 for housing the terminal 32, and the terminal housing portion 34 is formed with a hooking portion 38a and a hooking portion 38b for hooking the winding 26. The terminal 32 has a first contact 44, and when the terminal 32 is inserted into the terminal housing portion 34, the first contact 44 is connected to the winding 26 hooked to the hooking portion 38a and the hooking portion 38b. Furthermore, the terminal 32 has a second contact 48, and when the terminal 32 is inserted into the terminal housing portion 34, the second contact 48 contacts the electrode 56a of the connector 56 inserted into the connector insertion hole 52a of the brake core 14.

[0054] In the electromagnetic brake 10 of the present embodiment, when the terminal 32 is inserted into the terminal housing portion 34, the first contact 44 of the terminal 32 and the winding 26 of the coil 12 are connected without welding. In addition, when the connector 56 is inserted into the connector insertion hole 52a of the brake core 14 while the terminal 32 is inserted into the terminal housing portion 34, the electrode 56a and the second contact 48 of the terminal 32 are connected without welding. That is, since the electrode 56a of the connector 56 and the winding 26 of the coil 12 are connected via the terminal 32, the electrode 56a and the winding 26 are connected without welding. Therefore, it is possible to easily manufacture the electromagnetic brake 10.

[0055] In addition, in the present embodiment, the terminal housing portion 34 has an electrode guide portion 40a on the surface 34c opposite to the connector insertion hole 52a, and the electrode guide portion 40a guides the electrode 56a of the connector 56 to the second contact 48 in a state where the terminal 32 is housed in the terminal housing portion 34. Thus, when the connector 56 is inserted into the connector insertion hole 52a, the electrode 56a is guided to the electrode guide portion 40a and connected to the second contact 48. Thus, the connection between the electrode 56a of the connector 56 and the second contact 48 of the terminal 32 is performed without welding. Therefore, it is possible to easily manufacture the electromagnetic brake 10.

[0056] In addition, in the present embodiment, the electrode guide portion 40a has a tapered portion 40a1 formed in a tapered shape at the opening portion of the electrode guide portion 40a on the side opposite to the connector insertion hole 52a. Thus, the electrode 56a of the connector 56 is inserted into the electrode guide portion 40a along the tapered portion 40a1 and is guided to the second contact 48 of the terminal 32. Therefore, when the connector 56 is inserted into the connector insertion hole 52a, the electrode 56a and the terminal 32 are connected, so that the electromagnetic brake 10 can be easily manufactured.

[0057] In addition, in the present embodiment, the coil frame storage portion 54 of the brake core 14 has a notch portion 54b on the surface 54a opposite to the coil frame 24, and the coil frame 24 has a protrusion 24b on the inner peripheral surface 24a opposite to the notch portion 54b of the coil frame storage portion 54. When the coil frame 24 is stored in the coil frame storage portion 54, the protrusion 24b is engaged with the notch portion 54b. Thus, since the terminal storage portion 34 can be positioned at a position opposite to the connector insertion hole 52a of the connector mounting portion 52, the electrode 56a of the connector 56 becomes easy to insert into the terminal storage portion 34, and the electromagnetic brake 10 can be easily manufactured.

[0058] In addition, in the present embodiment, the coil bobbin 24 has a rib 24c on the inner peripheral surface 24a opposite to the coil bobbin storage portion 54. The rib 24c fills the gap between the inner peripheral surface 24a of the coil bobbin 24 and the surface 54a of the coil bobbin storage portion 54. Thus, since the shaking of the coil bobbin 24 in the coil bobbin storage portion 54 can be suppressed, the conduction quality can be improved in the state where the electrode 56a of the connector 56 is inserted into the terminal storage portion 34.

[0059] [Second embodiment]

[0060] The electromagnetic brake 10 of the second embodiment is different from the electromagnetic brake 10 of the first embodiment in the shape of the terminal housing portion 34 of the coil frame 24, the shape of the terminal 32, and the shape of the electrode 56a of the connector 56. The electromagnetic brake 10 of the second embodiment is described below, but the description of the same structure as the electromagnetic brake 10 of the first embodiment will be omitted.

[0061] Fig.14 It is a perspective view of the coil 12 . Fig.15 The terminal housing portion 34 is viewed from the negative side in the Y-axis direction. The bobbin 24 has flanges 28 formed on the positive and negative sides in the Z-axis direction. The winding 26 is wound between the two flanges 28 of the bobbin 24 to form the coil 12 .

[0062] like Fig.14As shown, an extension portion 30 extending toward the negative side in the Y-axis direction is formed on the flange 28 on the positive side in the Z-axis direction of the coil frame 24. Two terminal receiving portions 34 for receiving the terminals 32 are provided in the extension portion 30. The two terminal receiving portions 34 are arranged adjacent to each other in the X-axis direction.

[0063] The terminal receiving portion 34 is formed in a square tube shape extending along the Y-axis direction on the extension portion 30. Fig.14 As shown in FIG. 1 , an opening 58 for inserting the terminal 32 is provided on the negative side in the Y-axis direction. Fig.14 and Fig.15 As shown, the terminal receiving portion 34 has surfaces 34f and 34g facing each other in the Z-axis direction provided with the locking portions 38c and 38d, which are formed into slit shapes extending from the opening 58 side to the negative side in the Y-axis direction.

[0064] The end 26a of one side of the winding 26 wound on the coil frame 24 is bent toward the positive side in the Z-axis direction and is hung on the hanging portion 38c and the hanging portion 38d of the terminal storage portion 34 on the negative side in the X-axis direction. The end 26a of the other side of the winding 26 wound on the coil frame 24 is bent toward the positive side in the Z-axis direction and is hung on the hanging portion 38c and the hanging portion 38d of the terminal storage portion 34 on the positive side in the X-axis direction. In the first embodiment, the end 26a of the winding 26 is bent twice and hung on the hanging portion 38a and the hanging portion 38b of the terminal storage portion 34, but in the present embodiment, the end 26a of the winding 26 is bent only once and hung on the hanging portion 38c and the hanging portion 38d of the terminal storage portion 34.

[0065] like Fig.14 As shown, the terminal 32 is inserted into the terminal receiving portion 34 from the negative side in the Y-axis direction. Fig.16 It is a perspective view of the terminal 32 . Fig.17A This is a diagram of the terminal 32 as viewed from the positive side in the Z-axis direction. Fig. 17B This is a diagram of the terminal 32 as viewed from the negative side in the Y-axis direction. Fig. 17C This is a diagram of the terminal 32 as viewed from the positive side in the X-axis direction. Fig.18 It is a figure which shows the terminal accommodation part 34 in the state which accommodated the terminal 32.

[0066] like Fig.17A As shown, when the terminal 32 is viewed from the positive side in the Z-axis direction, a slit-shaped winding insertion portion 60 is formed on the terminal 32, and the slit-shaped winding insertion portion 60 extends from the end of the terminal 32 on the positive side in the Y-axis direction toward the negative side in the Y-axis direction. The positive side in the Y-axis direction of the winding insertion portion 60 is formed so that the width in the X-axis direction becomes narrower toward the negative side in the Y-axis direction. The end of the winding insertion portion 60 on the negative side in the Y-axis direction constitutes a first contact 62. Fig.18As shown, in the state where the terminal 32 is accommodated in the terminal receiving portion 34, the winding 26 disposed between the hanging portion 38c and the hanging portion 38d is inserted into the winding insertion portion 60, and the winding 26 and the terminal 32 are in contact at the first contact point 62. The end 26a of the winding 26 is clamped between the hanging portion 38c and the hanging portion 38d and the winding insertion portion 60 and is fixed in the terminal receiving portion 34.

[0067] like Fig. 17C As shown in FIG. 1 , when the terminal 32 is viewed from the positive side in the X-axis direction, a slit-shaped electrode insertion portion 64 is formed in the terminal 32, and the slit-shaped electrode insertion portion 64 extends from the end portion on the negative side in the Y-axis direction of the terminal 32 toward the positive side in the Y-axis direction. The inside of the electrode insertion portion 64 is formed into a shape that is curved in the Z-axis direction, and the narrowest portion of the electrode insertion portion 64 in the Z-axis direction constitutes the second contact point 66.

[0068] Fig.19 : is a perspective view of the connector 56. The connector 56 has two plate-shaped electrodes 56a protruding in the Y-axis direction. The two electrodes 56a are arranged to be separated in the X-axis direction. The electrode 56a is provided so that its width direction is the X-axis direction and its thickness direction is the Z-axis direction.

[0069] Fig. 20A This is a diagram showing a state before the connector 56 is attached to the brake core 14 . Fig. 20B 1 is a diagram showing a state where the connector 56 is mounted on the brake core 14. The connector 56 is inserted into the connector insertion hole 52a of the connector mounting portion 52 from the negative side in the Y-axis direction toward the positive side in the Y-axis direction. When the connector 56 is inserted into the connector insertion hole 52a of the connector mounting portion 52, the electrode 56a is inserted into the electrode insertion portion 64 of the terminal 32, and the electrode 56a is connected to the terminal 32 at the second contact 66. Since the electrode 56a is inserted into the electrode insertion portion 64, the movement of the terminal 32 to the negative side in the Y-axis direction is restricted, thereby preventing the terminal 32 from falling off from the terminal storage portion 34.

[0070] [Effects]

[0071] In the present embodiment, the coil frame 24 provided in the electromagnetic brake 10 has a terminal storage portion 34 for storing the terminal 32, and the terminal storage portion 34 is formed with a stop portion 38c and a stop portion 38d for stopping the winding 26. The terminal 32 has a first contact 62, and when the terminal 32 is inserted into the terminal storage portion 34, the first contact 62 is connected to the winding 26 stopped by the stop portion 38c and the stop portion 38d. Further, the terminal 32 has a second contact 66, and when the terminal 32 is inserted into the terminal storage portion 34, the second contact 66 contacts the electrode 56a of the connector 56 inserted into the connector insertion hole 52a of the brake core 14.

[0072] In the electromagnetic brake 10 of the present embodiment, when the terminal 32 is inserted into the terminal housing portion 34, the first contact 62 of the terminal 32 and the winding 26 of the coil 12 are connected without welding. In addition, when the connector 56 is inserted into the connector insertion hole 52a of the brake core 14 while the terminal 32 is inserted into the terminal housing portion 34, the electrode 56a and the second contact 66 of the terminal 32 are connected without welding. That is, since the electrode 56a of the connector 56 and the winding 26 of the coil 12 are connected via the terminal 32, the electrode 56a and the winding 26 are connected without welding. Therefore, the electromagnetic brake 10 can be easily manufactured.

[0073] [Other implementation methods]

[0074] The shape of the terminal 32 may not be limited to the shape of the terminal 32 described in the first embodiment and the second embodiment. The terminal 32 may be any shape as long as the end 26a of the winding 26 hooked to the hooking portions 38a, 38b, 38c, 38d of the terminal housing portion 34 is connected to the first contact 44, 62 of the terminal 32 when the terminal 32 is inserted into the terminal housing portion 34. In addition, the terminal 32 may be any shape as long as the electrode 56a of the connector 56 inserted into the connector insertion hole 52a is connected to the second contact 48, 66 of the terminal 32 when the terminal 32 is inserted into the terminal housing portion 34.

[0075] The shape of the electrode 56a of the connector 56 may not be limited to the shape of the electrode 56a described in the first embodiment and the second embodiment. The shape of the electrode 56a may also be cylindrical. In addition, the electrode 56a may also be a wire. In addition, the number of electrodes 56a may not be two, but three or more.

[0076] [Technical ideas obtained from implementation methods]

[0077] The technical ideas that can be grasped from the above-mentioned embodiments will be described below.

[0078] An electromagnetic brake (10) for an electric motor comprises: a coil frame (24) on which a winding (26) is wound; a connector (56) inserted from the outside and having a plurality of electrodes (56a); and a brake core (14) having a coil frame storage portion (54) and a connector insertion hole (52a), wherein the coil frame storage portion stores the coil frame and the connector insertion hole is used for inserting the connector. In the electromagnetic brake (10) for an electric motor, the coil frame has a plurality of terminal storage portions (34) and a stopper portion (38a, 38b), the plurality of terminal receiving portions receive terminals (32) inside, the locking portions are provided on any surface of the terminal receiving portions, and lock the winding, the terminal has a first contact (44) and a second contact (48), when the terminal is inserted into the terminal receiving portion, the first contact is connected to the winding locked to the locking portion, and when the terminal is received in the terminal receiving portion, the second contact contacts the electrode of the connector inserted into the connector insertion hole. Thus, the electromagnetic brake can be easily manufactured.

[0079] In the electromagnetic brake of the motor, each of the terminal receiving parts has an electrode guide part (40a), the electrode guide part (40a) is opposite to the connector insertion hole side, and when the terminal is received in the terminal receiving part, the electrode guide part (40a) guides the electrode of the connector to the second contact point, and when the connector is inserted into the connector insertion hole, each of the electrodes is inserted into the electrode guide part of each of the terminal receiving parts and contacts the second contact point inside the terminal receiving part. Thus, the electromagnetic brake can be easily manufactured.

[0080] In the electromagnetic brake of the motor, the electrode guide portion has a tapered portion (40a1) formed in a tapered shape at the opening outside the terminal receiving portion, thereby making it possible to easily manufacture the electromagnetic brake.

[0081] An electromagnetic brake for the above-mentioned motor, wherein the coil frame storage portion has a notch portion (54b) on the surface (54a) opposite to the coil frame, and the coil frame has a protrusion (24b) on the inner peripheral surface (24a) opposite to the notch portion of the coil frame storage portion, and when the coil frame is stored in the coil frame storage portion, the protrusion engages with the notch portion. As a result, since the terminal storage portion can be positioned at a position opposite to the connector insertion hole, the electrode of the connector becomes easy to insert into the terminal storage portion, and the electromagnetic brake can be easily manufactured.

[0082] In the electromagnetic brake of the motor, the coil frame has a rib (24c) on the surface opposite to the coil frame receiving portion, thereby suppressing the shaking of the coil frame in the coil frame receiving portion, thereby improving the conduction quality when the electrode of the connector is inserted into the terminal receiving portion.

Claims

1. An electromagnetic brake for a motor, comprising: a coil former on which a winding is wound; A connector inserted from the outside, which has a plurality of electrodes; and The brake core has a coil frame storage portion and a connector insertion hole, wherein the coil frame storage portion stores the coil frame, and the connector insertion hole is used for inserting the connector. The electromagnetic brake of the motor is characterized in that the coil frame has a plurality of terminal receiving portions and a locking portion. The plurality of terminal receiving portions receive terminals therein, the locking portions are provided on any surface of the terminal receiving portions, and lock the windings therein. The terminal has a first contact and a second contact, When the terminal is inserted into the terminal receiving portion, the first contact is connected to the winding hooked to the hook portion. When the terminal is received in the terminal receiving portion, the second contact contacts the electrode of the connector inserted into the connector insertion hole. The first contact is formed in a slit-shaped winding insertion portion that is continuously formed from a first side surface of the terminal to a second side surface opposite to the first side surface. The second contact is formed in a slit-shaped electrode insertion portion that is continuously formed from a third side surface of the terminal to a fourth side surface opposite to the third side surface. The width of the electrode insertion portion gradually narrows from the third side surface toward the second contact point, and also gradually narrows from the fourth side surface toward the second contact point.

2. The electromagnetic brake of the motor according to claim 1, characterized in that: Each of the terminal receiving portions has an electrode guiding portion, the electrode guiding portion is opposite to the connector insertion hole side, and when the terminal is received in the terminal receiving portion, the electrode guiding portion guides the electrode of the connector to the second contact point. When the connector is inserted into the connector insertion hole, each of the electrodes is inserted into the electrode guide portion of each of the terminal receiving portions and contacts the second contact point inside the terminal receiving portion.

3. The electromagnetic brake of the motor according to claim 2, characterized in that: The electrode guide portion has a tapered portion formed in a tapered shape at an opening portion outside the terminal receiving portion.

4. The electromagnetic brake of a motor according to any one of claims 1 to 3, characterized in that: The coil frame storage portion has a notch portion on a surface opposite to the coil frame. The coil frame has a protrusion on a surface facing the notch of the coil frame storage portion. When the coil bobbin is accommodated in the coil bobbin accommodating portion, the protruding portion is engaged with the notch portion.

5. The electromagnetic brake of a motor according to any one of claims 1 to 3, characterized in that: The coil bobbin has a rib on a surface facing the coil bobbin housing portion.

Images