Electromagnetic brake device and electromagnetic brake release mechanism

Abstract

To provide an electromagnetic brake device and an electromagnetic brake release mechanism capable of preventing loss of a release component and appropriately releasing an electromagnetic brake when necessary in the electromagnetic brake device having the electromagnetic brake mechanism and the electromagnetic brake release mechanism.SOLUTION: The electromagnetic brake device includes the electromagnetic brake mechanism 150 that brakes the rotation of the rotation shaft 131 of the rotation body 100 at the time of non-energization and releases the braking at the time of energization, and the electromagnetic brake release mechanism 160 that releases the braking at the time of energization, in which the electromagnetic brake release mechanism 160 includes the interval adjustment part 161 having a two step thickness of the high thickness part 161a and the low thickness part 161b with respect to the common hole part 162, and the tip end part 161a does not come into contact with the armature 154 when attached to the high thickness part 164c. And a bolt 164 whose tip part 161b comes into contact with the armature 154 in the direction of separating the armature 154 from the brake rotor 151 when attached to the low thickness part 164c.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an electromagnetic brake device and an electromagnetic brake release mechanism. [Background technology]

[0002] An electromagnetic brake device called a non-excitation brake is in a non-braking state when energized and the armature and brake rotor do not come into contact, and in a non-excitation state when de-energized and the armature and brake rotor come into contact and the brake is applied. The structure of this type of electromagnetic brake device is described in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-007062 Summary of the Invention [Problem to be solved by the invention]

[0004] For inspection or adjustment of the electromagnetic brake device, the movement of the armature can be suppressed from outside the electromagnetic brake device using a release part such as a bolt, and the electromagnetic brake can be released without contact between the armature and brake rotor even in a de-energized state.

[0005] When using a bolt as a release part to release an electromagnetic brake, the bolt can be lost when removed at a time when release is not required. If the release bolt is lost, the brake may not be released properly when release is required. The lost bolt may also get into surrounding equipment, causing malfunctions in other devices. This may mean that all surrounding equipment must be stopped until the missing bolt is found.

[0006] The present invention has been made to solve the above-mentioned problems, and has an object to provide an electromagnetic brake device and an electromagnetic brake release mechanism that prevent loss of release parts and are capable of properly releasing the electromagnetic brake when necessary, in an electromagnetic brake device having an electromagnetic brake mechanism and an electromagnetic brake release mechanism. [Means for solving the problem]

[0007] The electromagnetic brake device of the present invention comprises an electromagnetic brake mechanism that brakes the rotation of the rotating shaft of a rotating body when de-energized and releases the brake when energized, and an electromagnetic brake release mechanism that releases the brake when de-energized. The electromagnetic brake mechanism comprises a brake rotor attached to the rotating shaft and rotates together with the rotating shaft, an armature that includes a magnetic material and is configured to be able to move only in a direction along the axis of the rotating shaft, a biasing portion that biases the armature toward the brake rotor, and an electromagnetic coil that, when excited, attracts the armature in the opposite direction to the brake rotor. The electromagnetic brake release mechanism comprises a spacing adjustment portion that has two thickness levels, a high-thickness portion and a low-thickness portion, relative to a common hole portion, and a bolt whose tip does not contact the armature when attached to the high-thickness portion, and whose tip presses the armature in a direction that moves the armature away from the brake rotor when attached to the low-thickness portion.

[0008] In the electromagnetic brake device according to the present invention, the electromagnetic brake release mechanism further includes a connecting portion that connects the plurality of interval adjustment portions.

[0009] In the electromagnetic brake device according to the present invention, the plurality of interval adjustment portions and the connecting portion are configured in an annular shape.

[0010] In the electromagnetic brake device according to the present invention, the hole is formed as an elongated hole including a thick portion and a thin portion provided in the gap adjustment portion.

[0011] In the electromagnetic brake device of this invention, the bolt is configured with a head and a male threaded portion, the head contacting either the thick portion or the thin portion provided in the spacing adjustment portion, and the male threaded portion being fastened to a female threaded portion provided in the case of the rotating body.

[0012] The electromagnetic brake release mechanism of the present invention is an electromagnetic brake release mechanism that is used in conjunction with an electromagnetic brake mechanism that brakes the rotation of the rotating shaft of a rotating body when de-energized and releases the brake when energized, and that releases the brake when de-energized. The electromagnetic brake mechanism comprises: a brake rotor that is attached to the rotating shaft and rotates together with the rotating shaft; an armature that includes a magnetic body and is configured to be able to move only in a direction along the axis of the rotating shaft; a biasing portion that biases the armature toward the brake rotor; and an electromagnetic coil that, when excited, attracts the armature in the opposite direction to the brake rotor. The electromagnetic brake release mechanism comprises a spacing adjustment portion that has two thickness levels, a high-thickness portion and a low-thickness portion, relative to a common hole portion, and a bolt whose tip does not contact the armature when attached to the high-thickness portion, and whose tip presses the armature in a direction that moves the armature away from the brake rotor when attached to the low-thickness portion.

[0013] The electromagnetic brake release mechanism according to the present invention further includes a connecting portion that connects the plurality of interval adjustment portions.

[0014] In the electromagnetic brake release mechanism according to the present invention, the plurality of interval adjustment portions and the connecting portion are configured in an annular shape.

[0015] In the electromagnetic brake release mechanism according to the present invention, the hole is formed as an elongated hole including a thick portion and a thin portion provided in the gap adjustment portion.

[0016] In the electromagnetic brake release mechanism of this invention, the bolt is configured with a head and a male threaded portion, the head contacting either the thick portion or the thin portion provided in the spacing adjustment portion, and the male threaded portion being fastened to a female threaded portion provided in the case of the rotating body. [Effects of the Invention]

[0017] In this invention, the electromagnetic brake mechanism includes a brake rotor that is attached to a rotating shaft and rotates together with the rotating shaft, an armature that includes a magnetic material and is configured to be movable only in a direction along the axis of the rotating shaft, a biasing portion that biases the armature toward the brake rotor, and an electromagnetic coil that, when excited, attracts the armature in the opposite direction to the brake rotor, and the electromagnetic brake release mechanism includes a spacing adjustment portion that has two thickness levels, a high-thickness portion and a low-thickness portion, relative to a common hole portion, and a bolt whose tip does not contact the armature when attached to the high-thickness portion, and whose tip presses the armature in a direction that moves the armature away from the brake rotor when attached to the low-thickness portion. Here, in the brake non-release state, which does not require brake release, the bolt is attached to the thicker portion of the gap adjustment section, and in the brake release state, which requires brake release, the bolt is attached to the thinner portion of the gap adjustment section. Therefore, in both the brake release state and the brake non-release state of the electromagnetic brake, the bolt, which is the release part, is fastened to the case of the rotating body via the gap adjustment section. Therefore, in an electromagnetic brake device having an electromagnetic brake mechanism and an electromagnetic brake release mechanism, it is possible to provide an electromagnetic brake device and an electromagnetic brake release mechanism that prevent loss of the release part and can properly release the electromagnetic brake when necessary. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a cross-sectional view showing a cross section of a rotating body including an electromagnetic brake device according to a first embodiment. [Figure 2] 1 is a perspective view showing the structure of a main part of an electromagnetic brake mechanism according to a first embodiment. [Figure 3] 1 is a cross-sectional view showing a cross section of a rotating body including an electromagnetic brake device according to a first embodiment. [Figure 4] 1 is a cross-sectional view showing a cross section of a rotating body including an electromagnetic brake device according to a first embodiment. [Figure 5] 1 is a perspective view showing the structure of a main part of an electromagnetic brake mechanism according to a first embodiment. [Figure 6]1 is a perspective view showing the structure of a main part of an electromagnetic brake mechanism according to a first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electromagnetic brake device according to an embodiment of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals denote like parts throughout the drawings.

[0020] Embodiment 1 First, the structure of an electromagnetic brake device 140 having an electromagnetic brake mechanism 150 and an electromagnetic brake release mechanism 160 according to the first embodiment will be described with reference to FIGS. Fig. 1 is a cross-sectional view showing a cross section of a rotating body 100 including an electromagnetic brake device 140 according to embodiment 1. Fig. 2 is a perspective view showing the structure of a main part of an electromagnetic brake release mechanism 160 according to embodiment 1. Figs. 3 and 4 are cross-sectional views showing a cross section of a rotating body 100 including an electromagnetic brake device 140 according to embodiment 1.

[0021] [Structure of Rotating Body 100 Including Electromagnetic Brake Device 140] Rotating body 100 mainly includes a case 110, a stator 120, a rotor 130, and an electromagnetic brake device 140. Although a motor is shown as a specific example of rotating body 100, it may also be a generator, a rotation angle measuring device, or a rotary joint.

[0022] The case 110 is composed of a first bottom 111, a second bottom 112, a middle bottom 113, and a cylindrical portion 114. The first bottom 111 is provided with a female thread portion 111h. An electromagnetic brake device 140 is provided in an area surrounded by the first bottom 111, the middle bottom 113, and the cylindrical portion 114. A stator 120 and a rotor 130 of the motor portion M are provided in an area surrounded by the second bottom 112, the middle bottom 113, and the cylindrical portion 114.

[0023] The stator 120 is provided in a region sandwiched between the second bottom portion 112 and the middle bottom portion 113, and is fixed to the inner surface of the cylindrical portion 114. The stator 120 has a coil 125 wound around a core portion (not shown). The rotor 130 is provided in a space surrounded by the stator 120 so as to be rotatable relative to the stator 120 around a rotation axis 131. The rotation axis 131 is provided at the center of the rotor 130 and protrudes to the outside from the second bottom 112. Note that the rotation axis 131 may be configured to protrude to the outside from the first bottom 111. The second bottom portion 112, the middle bottom portion 113, the cylindrical portion 114, the stator 120, the coil 125, the rotor 130, and the rotating shaft 131 constitute a motor portion M.

[0024] The electromagnetic brake device 140 mainly includes an electromagnetic brake mechanism 150 and an electromagnetic brake release mechanism 160 . The electromagnetic brake mechanism 150 is a non-excitation operating brake that, when not excited, brakes the rotation of the rotary shaft 131. The electromagnetic brake mechanism 150 includes a brake rotor 151, a yoke 152, an electromagnetic coil 153, an armature 154, and a biasing portion 155. The brake rotor 151 is attached to the rotary shaft 131 and rotates together with the rotary shaft 131. The armature 154 is configured to include a magnetic material and is configured to be movable only in a direction along the axis of the rotary shaft 131. The biasing portion 155 is configured with a coil spring or the like and biases the armature 154 toward the brake rotor 151. The electromagnetic coil 153 forms a magnetic circuit together with the yoke 152 and attracts the armature 154 in the opposite direction to the brake rotor 151 when excited.

[0025] The electromagnetic brake release mechanism 160 is a release mechanism that, when necessary, forcibly releases the braking applied by the electromagnetic brake mechanism 150. The electromagnetic brake release mechanism 160 is provided with a distance adjustment portion 161, a hole portion 162, a connecting portion 163, and a bolt 164. The gap adjusting portion 161 is provided with a thick portion 161a and a thin portion 161b having two different thicknesses. The hole portion 162 is formed as an elongated hole including the thick portion 161a and the thin portion 161b provided in the gap adjusting portion 161. The connecting portion 163 connects the plurality of interval adjustment portions 161. In the example shown in FIG. 2, the connecting portion 163 and the plurality of interval adjustment portions 161 are configured as an annular ring portion RG. The term "annular" in the ring portion RG may include not only a perfect circle but also an ellipse, a polygon, etc. The connecting portion 163 is not limited to a shape connecting three interval adjustment portions 161 shown in FIG. 2. The bolt 164 is configured to include a head portion 164a, a male thread portion 164b, and a tip portion 164c.

[0026] The bolt 164 is attached so that the head 164a is positioned in either the thick portion 161a or the thin portion 161b provided in the gap adjusting portion 161. Then, the male thread portion 164b of the bolt 164 is fastened to the female thread portion 111h. The thickness of the thick portion 161a and the thin portion 161b in the gap adjusting portion 161 and the length of the bolt 164 are determined so as to satisfy the following conditions 1 and 2. Condition 1: When the head 164 a of the bolt 164 is attached to the thick portion 161 a , the tip 164 c does not come into contact with the armature 154 . Condition 2: When the head 164 a of the bolt 164 is attached to the thin portion 161 b , the tip 164 c presses the armature 154 in a direction that moves the armature 154 away from the brake rotor 151 .

[0027] [Non-braking state] FIG. 1 shows a state in which the motor unit M is operating and the electromagnetic brake mechanism 150 is in a non-braking state. When the motor unit M is operating, the coil 125 receives an external supply of power for rotational drive. In parallel with this, the electromagnetic coil 153 of the electromagnetic brake mechanism 150 receives an external supply of excitation power for non-braking. The electromagnetic coil 153 supplied with the excitation power forms a magnetic circuit together with the yoke 152 and generates a magnetic force toward the armature 154. Although a biasing force is applied to the armature 154 by the biasing portion 155 toward the brake rotor 151, the armature 154 is attracted toward the yoke 152, which is in the opposite direction from the brake rotor 151, due to the magnetic force from the electromagnetic coil 153 and the yoke 152. As a result, the armature 154 and the brake rotor 151 are separated from each other, and the electromagnetic brake mechanism 150 is in a non-braking state.

[0028] In the electromagnetic brake release mechanism 160, the head 164a of the bolt 164 is positioned in the thick portion 161a, and the male thread portion 164b is fastened to the female thread portion 111h. As a result, the tip portion 164c of the bolt 164 is not in contact with the armature 154. Therefore, the electromagnetic brake release mechanism 160 is in a brake non-release state in which the braking of the electromagnetic brake mechanism 150 is not released. Here, since the male threaded portion 164b of the bolt 164 is fastened to the female threaded portion 111h, it is possible to prevent the bolt 164, which is the release part, from being lost in a brake non-release state in which brake release by the electromagnetic brake release mechanism 160 is not required.

[0029] [Braking state] FIG. 3 shows a state in which the motor unit M is not operating and the electromagnetic brake mechanism 150 is in a braking state. The electromagnetic coil 153 does not receive an external supply of excitation power and does not generate magnetic force. Therefore, the armature 154 is pressed against the brake rotor 151 by the biasing force from the biasing portion 155. The armature 154 moves only in a direction along the axis of the rotating shaft 131 but does not rotate. Therefore, the frictional force between the brake rotor 151 and the armature 154 puts the electromagnetic brake mechanism 150 into a braking state. As a result, the rotating shaft 131 to which the brake rotor 151 is attached remains stationary.

[0030] In the electromagnetic brake release mechanism 160, the head 164a of the bolt 164 is positioned in the thick portion 161a, and the male thread portion 164b is fastened to the female thread portion 111h. As a result, the tip portion 164c of the bolt 164 does not come into contact with the armature 154. Therefore, the electromagnetic brake release mechanism 160 is in a brake non-release state in which the braking of the electromagnetic brake mechanism 150 is not released. Here, since the male threaded portion 164b of the bolt 164 is fastened to the female threaded portion 111h, it is possible to prevent the bolt 164, which is the release part, from being lost in a brake non-release state in which brake release by the electromagnetic brake release mechanism 160 is not required.

[0031] [Brake released state] FIG. 4 shows the state of braking release in which the electromagnetic brake release mechanism 160 releases the braking of the electromagnetic brake mechanism 150. As a stage prior to reaching the brake release state in FIG. 4, the motor unit M is not in operation, the biasing unit 155 biases the armature 154 toward the brake rotor 151, and the electromagnetic brake mechanism 150 is in a braking state (see FIG. 3). To change from the braked state (see FIG. 3) to the brake-released state (see FIG. 4), in the electromagnetic brake release mechanism 160, the bolt 164 located at the thick portion 161a is loosened, and the ring portion RG is rotated so that the head 164a of the bolt 164 is positioned at the thin portion 161b, and the male thread portion 164b is fastened to the female thread portion 111h. Here, since the hole 162 provided in the gap adjustment portion 161 is formed as an elongated hole that includes the thick portion 161a and the thin portion 161b, when rotating the ring portion RG, the bolt 164 only needs to be loosened and does not need to be removed. As a result, with the head 164a attached to the low-thickness portion 161b, the bolt 164 uses the tip 164c to press the armature 154 in a direction that moves the armature 154 away from the brake rotor 151. Therefore, the electromagnetic brake release mechanism 160 enters a brake release state in which the braking of the electromagnetic brake mechanism 150 is released.

[0032] [Transition from brake release state to braked or unbraked state] When switching the electromagnetic brake release mechanism 160 from the brake release state (see FIG. 4) to the brake non-release state (non-braking state (see FIG. 1) or braking state (see FIG. 3)), the bolt 164 located in the low thickness portion 161b is loosened, and the ring portion RG is rotated so that the head 164a of the bolt 164 is located in the high thickness portion 161a, and the male thread portion 164b is fastened to the female thread portion 111h. In this case, too, the bolt 164 only needs to be loosened, and there is no need to remove it, so that the bolt 164, which is the release part, can be prevented from being lost.

[0033] [Modification of the structure of the rotating body 100 including the electromagnetic brake device 140] Modified examples of the structure of the rotating body 100 including the electromagnetic brake device 140 will be described below with reference to Figures 5 and 6. Figures 5 and 6 are perspective views showing the structure of the main parts of an electromagnetic brake release mechanism 160 according to the first embodiment. 5, the first bottom portion 111 of the rotating body 100 is provided with an inner circumferential side convex portion 111a, an intermediate annular flat portion 111b, and an outer circumferential side convex portion 111c. In such a case, the ring portion RG and the female thread portion 111h can be disposed on the intermediate annular flat portion 111b, avoiding the inner circumferential side convex portion 111a and the outer circumferential side convex portion 111c. Note that, if it is possible to avoid the inner circumferential side convex portion 111a and the outer circumferential side convex portion 111c, the connecting portion 163 that connects the multiple gap adjustment portions 161 can be configured in a shape other than a ring, for example, a polygonal shape. When the first bottom portion 111 of the rotating body 100 is configured as a flat portion, or when the first bottom portion 111 is configured as an inner circumferential recess 111d and an annular flat portion 111e as shown in Fig. 6, the connecting portion 163 connecting three interval adjustment portions 161 can be configured in a Y shape. When four interval adjustment portions 161 are connected, the connecting portion 163 can be configured in an X shape. The number and positions of the bolts 164 and the female threaded portions 111 h may be determined arbitrarily so as to reliably press the armature 154 in a direction away from the brake rotor 151 against the biasing force of the biasing portion 155 .

[0034] [Effects obtained by the first embodiment] The electromagnetic brake device 140 and the electromagnetic brake release mechanism 160 according to the first embodiment can provide the following effects. Electromagnetic brake device 140 according to the first embodiment includes electromagnetic brake mechanism 150 that brakes the rotation of rotating shaft 131 of rotating body 100 when de-energized and releases the brake when energized, and electromagnetic brake release mechanism 160 that releases the brake when de-energized. Electromagnetic brake mechanism 150 includes brake rotor 151 that is attached to rotating shaft 131 and rotates together with rotating shaft 131, armature 154 that includes a magnetic material and is configured to be movable only in a direction along the axis of rotating shaft 131, biasing portion 155 that biases armature 154 toward brake rotor 151, and electromagnetic coil 153 that attracts armature 154 in the direction away from brake rotor 151 when excited. The electromagnetic brake release mechanism 160 according to the first embodiment has a spacing adjustment portion 161 having two thickness stages, a high-thickness portion 161a and a low-thickness portion 161b, with respect to a common hole portion 162, and a bolt 164 having a tip portion 164c that does not contact the armature 154 when attached to the high-thickness portion 161a, and a tip portion 164c that contacts the armature 154 in a direction that moves the armature 154 away from the brake rotor 151 when attached to the low-thickness portion 161b. Here, in a brake non-release state where brake release is not required, bolt 164 is attached to thick portion 161a of interval adjustment portion 161, and in a brake release state where brake release is required, bolt 164 is attached to thin portion 161b of interval adjustment portion 161. Therefore, in both the brake release state and the brake non-release state of the electromagnetic brake, bolt 164, which is the release part, remains attached to case 110 of rotating body 100 via interval adjustment portion 161. Therefore, in a brake non-release state where brake release by electromagnetic brake release mechanism 160 is not required, bolt 164, which is the release part, can be prevented from being lost. Therefore, in an electromagnetic brake device 140 having an electromagnetic brake mechanism 150 and an electromagnetic brake release mechanism 160, it is possible to provide an electromagnetic brake device 140 and an electromagnetic brake release mechanism 160 that prevent the loss of release parts and can appropriately release the braking of the electromagnetic brake when necessary.

[0035] The electromagnetic brake release mechanism 160 of the first embodiment is further provided with a connecting portion 163 that connects the plurality of interval adjustment portions 161. Therefore, when switching between the non-braking state or the braking state and the brake release state, by rotating the plurality of interval adjustment portions 161 that are connected together by the connecting portion 163, the head 164a of the bolt 164 can be positioned at either the thick portion 161a or the thin portion 161b, and the male thread portion 164b can be fastened to the female thread portion 111h.

[0036] In the electromagnetic brake release mechanism 160 of the first embodiment, the plurality of interval adjustment portions 161 and the connecting portion 163 are configured as an annular ring portion RG. Therefore, when switching between the non-braking state or the braking state and the brake release state, the ring portion RG including the plurality of interval adjustment portions 161 connected by the connecting portion 163 is rotated so that the head 164a of the bolt 164 is positioned at either the thick portion 161a or the thin portion 161b, thereby enabling the male thread portion 164b to be fastened to the female thread portion 111h.

[0037] In the electromagnetic brake release mechanism 160 of the first embodiment, the hole 162 is formed as an elongated hole including a thick portion 161a and a thin portion 161b provided in the interval adjustment portion 161. Therefore, when switching between the non-braking state or the braking state and the brake release state, the bolt 164 is loosened without being removed, and the ring portion RG including the plurality of interval adjustment portions 161 connected by the connecting portion 163 is rotated, whereby the head 164a of the bolt 164 is positioned at either the thick portion 161a or the thin portion 161b, and the male thread portion 164b can be fastened to the female thread portion 111h.

[0038] In the electromagnetic brake release mechanism 160 of the first embodiment, the bolt 164 is configured to include a head 164a and an externally threaded portion 164b, the head 164a being in contact with either the thick portion 161a or the thin portion 161b provided in the interval adjustment portion 161, and the externally threaded portion 164b being fastened to an internally threaded portion 111h provided in the case 110 of the rotating body 100. Therefore, in both the brake-released state and the brake-non-released state of the electromagnetic brake, the bolt 164 serving as the release part remains attached to the case 110 of the rotating body 100 via the interval adjustment portion 161. Therefore, in the brake-non-released state in which brake release by the electromagnetic brake release mechanism 160 is not required, it is possible to prevent the bolt 164 serving as the release part from being lost. [Explanation of symbols]

[0039] 100 Rotating body, 110 Case, 111 First bottom, 111a Inner peripheral convex portion, 111b Intermediate annular flat portion, 111c Outer peripheral convex portion, 111d Inner peripheral concave portion, 111e Annular flat portion, 111h Female thread portion, 112 Second bottom, 113 Middle bottom portion, 114 Cylinder portion, 120 Stator, 125 Coil, 130 Rotor, 131 Rotating shaft, 140 Electromagnetic brake device, 150 Electromagnetic brake mechanism, 151 Brake rotor, 152 Yoke, 153 Electromagnetic coil, 154 Armature, 155 Biasing portion, 160 Electromagnetic brake release mechanism, 161 Spacing adjustment portion, 161a High thickness portion, 161b Low thickness portion, 162 Hole portion, 163 Connecting portion, 164 Bolt, 164a Head, 164b male threaded portion, 164c tip portion, RG ring portion.

Claims

1. an electromagnetic brake mechanism (150) that brakes the rotation of the rotating shaft (131) of the rotating body (100) when not energized and releases the brake when energized; an electromagnetic brake release mechanism (160) that releases the braking when de-energized; The electromagnetic brake mechanism (150) a brake rotor (151) attached to the rotary shaft (131) and rotating together with the rotary shaft (131); an armature (154) including a magnetic material and configured to be movable only in a direction along the axis of the rotating shaft (131); a biasing portion (155) that biases the armature (154) toward the brake rotor (151); an electromagnetic coil (153) that, when excited, attracts the armature (154) in a direction opposite to the brake rotor (151); The electromagnetic brake release mechanism (160) a gap adjusting portion (161) having two thicknesses, a thick portion (161a) and a thin portion (161b), with respect to a common hole portion (162); a bolt (164) having a tip end (164c) that does not come into contact with the armature (154) when attached to the thick portion (161a), and having a tip end (164c) that presses the armature (154) in a direction that moves the armature (154) away from the brake rotor (151) when attached to the thin portion (161b); Electromagnetic brake device.

2. the electromagnetic brake release mechanism (160) further includes a connecting portion (163) that connects the plurality of interval adjustment portions (161); 2. The electromagnetic brake device according to claim 1.

3. The plurality of interval adjustment portions (161) and the connecting portion (163) are configured in an annular shape.

3. The electromagnetic brake device according to claim 2.

4. The hole (162) is formed as an elongated hole including the thick portion (161a) and the thin portion (161b) provided in the gap adjustment portion (161).

2. The electromagnetic brake device according to claim 1.

5. The bolt (164) is configured to include a head (164a) and a male thread portion (164b), The head portion (164a) is in contact with either the thick portion (161a) or the thin portion (161b) of the gap adjusting portion (161), The male thread portion (164b) is fastened to a female thread portion (111h) provided on a case (110) of the rotating body (100).

2. The electromagnetic brake device according to claim 1.

6. An electromagnetic brake release mechanism (160) is used together with an electromagnetic brake mechanism (150) that brakes rotation of a rotating shaft (131) of a rotating body (100) when not energized and releases the brake when energized, and releases the brake when not energized, The electromagnetic brake mechanism (150) a brake rotor (151) attached to the rotary shaft (131) and rotating together with the rotary shaft (131); an armature (154) including a magnetic material and configured to be movable only in a direction along the axis of the rotating shaft (131); a biasing portion (155) that biases the armature (154) toward the brake rotor (151); an electromagnetic coil (153) that, when excited, attracts the armature (154) in a direction opposite to the brake rotor (151); The electromagnetic brake release mechanism (160) a gap adjusting portion (161) having two thicknesses, a thick portion (161a) and a thin portion (161b), with respect to a common hole portion (162); a bolt (164) having a tip end (164c) that does not come into contact with the armature (154) when attached to the thick portion (161a), and having a tip end (164c) that presses the armature (154) in a direction that moves the armature (154) away from the brake rotor (151) when attached to the thin portion (161b); Electromagnetic brake release mechanism.

7. the electromagnetic brake release mechanism (160) further includes a connecting portion (163) that connects the plurality of interval adjustment portions (161); 7. The electromagnetic brake release mechanism according to claim 6.

8. The plurality of interval adjustment portions (161) and the connecting portion (163) are configured in an annular shape.

8. The electromagnetic brake release mechanism according to claim 7.

9. The hole (162) is formed as an elongated hole including the thick portion (161a) and the thin portion (161b) provided in the gap adjustment portion (161).

7. The electromagnetic brake release mechanism according to claim 6.

10. The bolt (164) is configured to include a head (164a) and a male thread portion (164b), The head portion (164a) is in contact with either the thick portion (161a) or the thin portion (161b) of the gap adjusting portion (161), The male thread portion (164b) is fastened to a female thread portion (111h) provided on a case (110) of the rotating body (100).

7. The electromagnetic brake release mechanism according to claim 6.

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