Brake device and cushion member

Abstract

The present disclosure provides a brake device (8) and a buffer member (100), in which a buffer portion (110) can be easily replaced and generation of contact sound when a field member (10) is in contact with an armature (20) can be suppressed. A brake device (8) is provided with a field member (10), an electromagnetic coil (80), an armature (20), a biasing part (70), and a buffer member (100). The field member (10) has a first surface (11) and a second surface (12), and has formed therein a hole (16) penetrating from the first surface (11) to the second surface (12). The buffer member (100) is formed so as to be insertable into the hole (16) from the second surface (12) toward the first surface (11), has a buffer section (110) disposed at one end, and is disposed in the hole (16) such that the armature (20) comes into contact with the buffer section (110) when the armature (20) approaches the first surface (11).

Description

Technical Field

[0001] The present disclosure relates to a braking device and a buffer component. Background Art

[0002] In the conventional brake device, a buffer, a collar, and a pressing rod are stored in a storage chamber formed in the field component. In the process of the armature moving from the braking position to the allowing position, the pressing rod moves integrally with the armature and indirectly abuts against the buffer via the collar. The buffer suppresses the generation of sound when the field component abuts against the armature. In addition, by removing the cover for opening and closing the opening of the storage chamber, the buffer can be replaced without disassembling the brake device (for example, refer to patent document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-100450 Summary of the invention

[0006] Problems to be solved by the invention

[0007] In the above-mentioned conventional brake device, the buffer portion can be easily replaced, but since the buffer portion does not directly contact the armature, there is a problem that it is difficult to suppress the generation of contact noise when the field member and the armature contact.

[0008] The present disclosure has been made to solve the above-mentioned problems, and an object thereof is to provide a brake device and a buffer member that can easily replace a buffer portion and can suppress the generation of contact noise when a field member and an armature come into contact.

[0009] Means for solving problems

[0010] The braking device disclosed in the present invention comprises: a field component, which has a first surface and a second surface and is formed with a hole penetrating from the first surface to the second surface; an electromagnetic coil, which is arranged on the field component; an armature, which is arranged in a manner opposite to the first surface and approaches the first surface when the electromagnetic coil is energized; a force-applying portion, which is arranged between the armature and the field component and applies force to the armature in a direction away from the first surface; and a buffer component, which is formed so as to be able to be inserted into the hole from the second surface toward the first surface and has a buffer portion arranged at one end, and the buffer component is arranged in the hole in a manner such that the armature contacts the buffer portion when the armature approaches the first surface.

[0011] The buffer component disclosed in the present invention is used for a braking device, which includes: a field component, which has a first surface and a second surface, and is formed with a hole that passes from the first surface to the second surface; an electromagnetic coil, which is arranged on the field component; an armature, which is arranged in a manner opposite to the first surface and approaches the first surface when the electromagnetic coil is energized; and a force-applying portion, which is arranged between the armature and the field component and applies force to the armature in a direction away from the first surface, wherein the buffer component is formed to be able to be inserted into the hole from the second surface toward the first surface, and a buffer portion is arranged at one end, and the buffer component is arranged in the hole in a manner that the armature contacts the buffer portion when the armature moves in a direction approaching the first surface.

[0012] Effects of the Invention

[0013] The brake device and the buffer member of the present disclosure can easily replace the buffer portion and can suppress the generation of contact noise when the field member and the armature come into contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the elevator hoisting machine according to the first embodiment.

[0015] Figure 2 It is a side view of the elevator hoisting machine according to Embodiment 1.

[0016] Figure 3 It is a cross-sectional view of the brake device according to the first embodiment.

[0017] Figure 4 This is a perspective view of the cushioning member according to the first embodiment.

[0018] Figure 5 It is a cross-sectional view of the brake device according to the first embodiment.

[0019] Figure 6 It is a cross-sectional view of the brake device according to the first embodiment.

[0020] Figure 7 It is a cross-sectional view of the brake device according to the first embodiment.

[0021] Figure 8 It is a cross-sectional view of the brake device according to the first embodiment.

[0022] Fig. 9 It is a perspective view showing a cushioning member according to a modified example of the first embodiment.

[0023] Fig.10 It is a perspective view showing a cushioning member according to a modified example of the first embodiment.

[0024] Fig.11 It is a cross-sectional view showing a brake device according to a modified example of the first embodiment.

[0025] Description of symbols

[0026] 1: elevator traction machine, 2: machine base, 3: rope pulley, 4: brake disc, 5: rotating shaft, 6: motor, 7: bearing seat, 7a: mounting portion, 8: brake device, 10: field component, 11: first surface, 12: second surface, 13: spring storage hole, 14: coil storage groove, 15: guide portion storage hole, 16: hole, 16a: small hole, 16b: large hole, 20: armature, 21: third surface, 22: fourth surface, 23: guide portion storage hole, 31: brake block, 32: brake block, 40: brake shaft, 50: connecting component, 51: extension portion, 60: spring, 70: spring, 80: electromagnetic coil, 90: guide portion, 100: buffer component, 110: buffer portion, 120: support portion, 121: protrusion, 130: flange portion. DETAILED DESCRIPTION

[0027] Implementation method 1.

[0028] Hereinafter, the brake device 8 according to the first embodiment will be described in detail. In addition, the same reference numerals in the respective drawings represent the same or corresponding structures.

[0029] like Figure 1 , Figure 2 As shown, the brake device 8 is provided, for example, on the elevator hoisting machine 1. The elevator hoisting machine 1 is fixed to the upper part of the machine base 2 and supported by the machine base 2.

[0030] The elevator hoisting machine 1 includes a sheave 3 , a brake disc 4 , a rotating shaft 5 , a motor 6 , a bearing seat 7 , and a brake device 8 .

[0031] A main rope (not shown) is wound around the outer peripheral surface of the sheave 3. The sheave 3 is fixed to the rotating shaft 5 so as to rotate integrally with the rotating shaft 5.

[0032] The brake disc 4 is formed in a disk shape. The brake disc 4 is fixed to the sheave 3 and rotates integrally with the sheave 3. When the brake disc 4 is braked by the brake device 8, the sheave 3 is braked.

[0033] One end of the rotating shaft 5 is rotatably supported by the motor 6, and the other end of the rotating shaft 5 is rotatably supported by the bearing seat 7. The motor 6 rotates the sheave 3 and the brake disc 4 via the rotating shaft 5.

[0034] The brake device 8 brakes the rotation of the rope pulley 3 by braking the rotation of the brake disc 4. For example, two brake devices 8 are provided. The two brake devices 8 are respectively installed on the bearing seat 7 at Figure 1 The mounting portion 7a extends in the left-right direction on the paper.

[0035] Figure 3 express Figure 1sectional view of the brake device 8 in the AA' section of the elevator traction machine 1. The brake device 8 includes a field component 10, an armature 20, brake shoes 31, 32, a brake shaft 40, a connecting component 50, a spring 60, a spring 70 as a biasing part, an electromagnetic coil 80, a guide part 90 and a buffer component 100.

[0036] The field component 10 is formed of a magnetic body and is arranged opposite to the armature 20. The field component 10 is formed of, for example, steel among magnetic bodies. The field component 10 has a first surface 11 and a second surface 12. The first surface 11 is a surface opposite to the armature 20. The second surface 12 is a surface located on the side opposite to the armature 20 in a direction parallel to the direction from the armature 20 toward the field component 10. In the following description, the direction parallel to the direction from the armature 20 toward the field component 10 is also referred to as the left and right direction. In addition, the direction from the armature 20 toward the field component 10 is also referred to as the right direction, and the direction from the field component 10 toward the armature 20 is also referred to as the left direction.

[0037] The field member 10 is mounted on the mounting portion 7 a of the bearing housing 7 so as to be movable in the left-right direction.

[0038] The first surface 11 is formed with a spring housing hole 13 for housing the spring 70 , a coil housing groove 14 for housing the electromagnetic coil 80 , and a guide portion housing hole 15 for housing the guide portion 90 .

[0039] The spring receiving hole 13 is a recessed portion recessed to the right. Two spring receiving holes 13 are provided. One end of the spring 70 is received in the spring receiving hole 13.

[0040] The coil housing groove 14 is a groove formed in an annular shape along the first surface 11. The electromagnetic coil 80 is housed in the coil housing groove 14.

[0041] The guide portion receiving hole 15 is a recessed portion recessed in the right direction. Two guide portion receiving holes 15 are provided. One end of the guide portion 90 is received in the guide portion receiving hole 15.

[0042] The presence component 10 is formed with a hole 16 penetrating from the first surface 11 to the second surface 12. The hole 16 is formed Figure 3 The cross section in the depth direction of the paper surface is circular. The hole 16 has a small hole 16a and a large hole 16b. The small hole 16a is connected to the large hole 16b. The inner diameter of the small hole 16a is smaller than the inner diameter of the large hole 16b. The small hole 16a is formed at a position closer to the armature 20 than the large hole 16b.

[0043] The armature 20 is formed of a magnetic body. The armature 20 is formed of, for example, steel among magnetic bodies. The armature 20 has a third surface 21 and a fourth surface 22. The third surface 21 is a surface facing the first surface 11 of the field component 10. The fourth surface 22 is a surface located on the side opposite to the field component 10 in the left-right direction.

[0044] The third surface 21 is formed with a guide portion receiving hole 23 for receiving the guide portion 90. The guide portion receiving hole 23 is a recessed portion recessed in the left direction. Two guide portion receiving holes 23 are provided. The other end of the guide portion 90 is received in the guide portion receiving hole 23.

[0045] The brake pads 31 and 32 are respectively arranged to face the brake disc 4 in a manner of sandwiching the brake disc 4 from the left and right directions. The brake pad 31 is arranged at a position closer to the armature 20 side than the brake pad 32 in the left and right directions. The brake pad 31 is connected to the armature 20 via the brake shaft 40. The brake pad 32 is connected to the field component 10 via the connecting member 50.

[0046] One end of the brake shaft 40 is connected to the brake shoe 31, and the other end of the brake shaft 40 is connected to the armature 20. The brake shoe 31 and the brake shaft 40 move integrally with the armature 20.

[0047] The connection member 50 connects the brake shoe 32 and the field member 10. The brake shoe 32 and the connection member 50 move integrally with the field member 10. The connection member 50 has an extending portion 51 extending in a direction perpendicular to the left-right direction.

[0048] The spring 60 is arranged between the extension portion 51 and the bearing seat 7 in the left-right direction. One end of the spring 60 is fixed to the extension portion 51, and the other end of the spring 60 is fixed to the bearing seat 7. The spring 60 is, for example, a compression coil spring. In addition, the spring 60 may also be a leaf spring. In addition, rubber or foamed polyurethane may also be used instead of the spring 60.

[0049] Two springs 70 are provided, and are arranged between the armature 20 and the field component 10 in the left-right direction. One end of the spring 70 is received in the spring receiving hole 13. One end of the spring 70 contacts the bottom surface of the spring receiving hole 13, and the other end of the spring 70 contacts the third surface 21 of the armature 20. The spring 70 applies force to the armature 20 so that the brake pad 31 contacts the brake disc 4. The spring 70 is, for example, a compression coil spring. The spring 70 may also be a leaf spring. In addition, rubber or foamed polyurethane may also be used as the force applying portion.

[0050] The electromagnetic coil 80 is provided in the field member 10 . Specifically, the electromagnetic coil 80 is accommodated in the coil accommodation groove 14 of the field member 10 .

[0051] The guide 90 is a member for guiding the movement of the armature 20 in the left-right direction. Two guides 90 are provided, and are arranged between the field member 10 and the armature 20 in the left-right direction. One end of the guide 90 is received in the guide receiving hole 15, and the other end of the guide 90 is received in the guide receiving hole 23.

[0052] The buffer member 100 is formed to be insertable into the hole 16 from the second surface 12 toward the first surface 11. The buffer member 100 is disposed in the hole 16 and fixed to the field member 10 by screws (not shown). The buffer member 100 is formed in a rod shape, for example.

[0053] like Figure 4 As shown, the cushioning member 100 includes a cushioning portion 110 , a supporting portion 120 , and a flange portion 130 .

[0054] The buffer portion 110 is disposed at one end of the buffer component 100. Figure 5 As shown, when the buffer component 100 is arranged in the hole 16, the buffer portion 110 protrudes from the first surface 11 of the field component 10 by 0.5 mm, for example. The buffer portion 110 suppresses the impact when the field component 10 contacts the armature 20 and the generation of contact sound. The buffer portion 110 is, for example, rubber and is formed in an annular shape. In addition, the buffer portion 110 only needs to suppress any one of the impact when the field component 10 contacts the armature 20 and the generation of contact sound. In addition, the length of the buffer portion 110 protruding from the first surface 11 is not limited to 0.5 mm. It is sufficient to arrange the buffer component 100 in the hole 16 in such a way that the armature 20 contacts the buffer portion 110 when the armature 20 approaches the first surface 11.

[0055] The support part 120 is formed of a magnetic body and is formed in a cylindrical shape. The support part 120 is preferably formed of the same material as the field component 10 among magnetic bodies. Figure 4 The buffer portion 110 is supported by the support portion 120 by being fitted with the protrusion 121 of the support portion 120.

[0056] The flange 130 is arranged at the other end of the buffer component 100. The flange 130 is annular and protrudes from the support portion 120 toward the radial direction of the support portion 120. The flange 130 is formed by a magnetic body. The flange 130 is more preferably formed by the same material as the field component 10 in the magnetic body. The flange 130 can also be integrally formed with the support portion 120. The outer diameter of the flange 130 is larger than the inner diameter of the small hole 16a. Therefore, when the buffer component 100 is inserted into the hole 16 from the second surface 12 toward the first surface 11 and arranged in the hole 16, the flange 130 cannot enter the small hole 16a. That is, the flange 130 limits the movement of the buffer component 100 in the direction close to the armature 20 by contacting with the field component 10. In addition, the outer diameter of the flange 130 is smaller than the inner diameter of the large hole 16b. Therefore, when the buffer component 100 is arranged in the hole 16, the flange 130 is arranged in the large hole 16b.

[0057] Next, the operation of the braking device 8 will be described.

[0058] First, use Figure 5 , Figure 6 , Figure 7 The operation of the brake device 8 when changing from a state of braking the rotation of the brake disc 4 to a state of not braking the rotation of the brake disc 4 is described. In the following description, the state in which the brake device 8 brakes the rotation of the brake disc 4 is also referred to as the braking state, and the state in which the brake device 8 does not brake the rotation of the brake disc 4 is also referred to as the non-braking state.

[0059] like Figure 5 As shown, when the electromagnetic coil 80 is not energized, the brake device 8 is in a braking state. At this time, the brake pad 31 is urged by the spring 70 via the armature 20 and contacts the brake disc 4. In addition, the brake pad 32 contacts the brake disc 4.

[0060] When the electromagnetic coil 80 is energized, the field element 10 is magnetized. Figure 6 As shown, the field component 10 moves in the left direction, that is, in the direction close to the armature 20. In other words, when the electromagnetic coil 80 is energized, the third surface 21 of the armature 20 is relatively close to the first surface 11 of the field component 10. And the armature 20 contacts the buffer 110. After that, the field component 10 further moves in the left direction, and the first surface 11 contacts the third surface 21 of the armature 20. At this time, the buffer 110 suppresses the impact and contact sound when the field component 10 contacts the armature 20.

[0061] When the field component 10 moves to the left, the brake pad 32 and the connecting member 50 also move to the left, and the brake pad 32 is separated from the brake disc 4. At this time, the spring 60 is stretched, and a force acts in the direction in which the spring 60 contracts.

[0062] like Figure 7 As shown, by the contraction of spring 60, connecting member 50 moves to the right direction. In conjunction with this movement, brake pad 32 and field member 10 move to the right direction. In addition, at this time, since field member 10 is magnetized, field member 10 attracts armature 20. Therefore, when field member 10 moves to the right direction, armature 20 also moves to the right direction. Moreover, brake pad 31 and brake shaft 40 also move to the right direction in conjunction with the movement of armature 20. When brake pad 31 moves to the right direction, brake pad 31 leaves brake disc 4, and brake device 8 becomes non-braking state.

[0063] Next, use Figure 5 , Figure 8 The operation of the braking device 8 when it changes from the non-braking state to the braking state will be described.

[0064] When the electromagnetic coil 80 is de-energized when the brake device 8 is in the non-braking state, the magnetic force of the field component 10 disappears. Figure 8As shown, the armature 20 is urged by the spring 70, and the armature 20 moves to the left. In conjunction with this movement, the brake shaft 40 and the brake pad 31 move to the left. Then, the brake pad 31 contacts the brake disc 4. At this time, the third surface 21 of the armature 20 leaves the first surface 11 of the field component 10.

[0065] The field component 10 is urged by the extension of the spring 70, and the field component 10 moves to the right. In conjunction with this movement, the connecting component 50 and the brake block 32 move to the right. Figure 5 As shown, the brake pad 32 is in contact with the brake disc 4, and the brake device 8 is in a braking state.

[0066] When the brake device 8 repeatedly switches between the braking state and the non-braking state, the buffer portion 110 is worn due to contact with the armature 20. Figure 5 , the operation of replacing the buffer portion 110 by the operator when the buffer portion 110 is worn will be described. In addition, the buffer portion 110 may be replaced regardless of whether the buffer portion 110 is worn.

[0067] First, the worker loosens the screws (not shown) fixing the buffer member 100 to the field member 10 and pulls the buffer member 100 out from the hole 16 in the right direction. That is, the buffer member 100 is pulled out in the direction from the first surface 11 to the second surface 12.

[0068] Next, the worker removes the worn buffer portion 110 from the protrusion 121 and fits a new buffer portion 110 into the protrusion 121 .

[0069] Finally, the worker inserts the buffer member 100 toward the left into the hole 16. That is, the buffer member 100 is inserted into the hole 16 from the second surface 12 toward the first surface 11. After placing the buffer member 100 in the hole 16, the worker fixes the buffer member 100 to the field member 10 with a screw.

[0070] In the brake device 8 of such embodiment 1, there is provided: a field component 10 having a hole 16 extending from the first surface 11 to the second surface 12; and a buffer component 100 formed so as to be insertable into the hole 16 from the second surface 12 toward the first surface 11, and having a buffer portion 110 disposed at one end, the buffer component 100 being disposed in the hole 16 in such a manner that the armature 20 contacts the buffer portion 110 when the armature 20 approaches the first surface 11 of the field component 10. With such a structure, the buffer component 100 can be pulled out of the hole 16 without disassembling the brake device 8, and the buffer component 100 can be inserted into the hole 16. Therefore, the buffer portion 110 disposed at one end of the buffer component 100 can be easily replaced. In addition, the disassembly of the brake device 8 includes removing the field component 10 from the mounting portion 7a of the bearing seat 7, etc. Furthermore, since the buffer member 100 is disposed in the hole 16 so that the buffer portion 110 is in direct contact with the armature 20 , it is possible to suppress the occurrence of impact and contact noise when the field member 10 and the armature 20 come into contact.

[0071] The buffer member 100 of the first embodiment is formed to be insertable into the hole 16 from the second surface 12 toward the first surface 11, and a buffer portion 110 is arranged at one end, and is arranged in the hole 16 in such a manner that the armature 20 contacts the buffer portion 110 when the armature 20 approaches the first surface 11 of the field member 10. As described above, the buffer portion 110 arranged at one end of the buffer member 10 can be easily replaced. In addition, the impact and contact sound generated when the field member 10 contacts the armature 20 can be suppressed.

[0072] Moreover, in the brake device 8 of the first embodiment, the buffer component 100 has a support portion 120 supporting the buffer portion 110, and the support portion 120 is formed of a magnetic body. Generally, the magnetic permeability of a magnetic body is greater than that of a non-magnetic body. Therefore, compared with the case where the support portion 120 formed of a non-magnetic body is arranged in the hole 16, the support portion 120 formed of a magnetic body is arranged in the hole 16, which can increase the magnetic force generated by the field component 10.

[0073] Furthermore, in the brake device 8 of the first embodiment, the buffer member 100 has a flange portion 130. The flange portion 130 contacts the field member 10 when the buffer member 100 is arranged in the hole 16, thereby restricting the buffer member 100 from moving in a direction close to the armature 20. Therefore, whenever the operator inserts the buffer member 100 from the second surface 12 toward the first surface 11, the buffer member 100 can be stopped at the same position. For example, if the position is set to a position where the buffer portion 110 protrudes 0.5 mm from the first surface 11 of the field member 10, the position of the buffer member 100 can be easily adjusted.

[0074] Furthermore, in the brake device 8 of the first embodiment, the buffer portion 110 is fitted with the protrusion 121, whereby the buffer portion 110 is supported by the support portion 120. It is also possible to support the buffer portion 110 by using an adhesive instead of fitting the buffer portion 110 and the support portion 120. However, if an adhesive is applied between the buffer portion 110 and the support portion 120, the buffer portion 110 may be tilted relative to the axial direction of the support portion 120 due to uneven thickness of the adhesive. On the other hand, by fitting the buffer portion 110 and the support portion 120, the buffer portion 110 can be supported by the support portion 120 without using an adhesive. Therefore, the axial tilt of the buffer portion 110 relative to the support portion 120 can be suppressed.

[0075] Furthermore, although the example in which two brake devices 8 are provided has been described, one, or three or more brake devices may be provided.

[0076] In addition, if Fig. 9 As shown, the buffer portion 110 may be provided with a convex portion 111, and the support portion 120 may be provided with a concave portion 122. The buffer portion 110 may be supported by the support portion 120 by fitting the convex portion 111 of the buffer portion 110 with the concave portion 122 of the support portion 120.

[0077] In addition, if Fig.10 As shown, the buffer portion 110 may be formed in a cylindrical shape, and the support portion 120 may not have the protrusion 121. The buffer portion 110 may be supported by the support portion 120 by applying an adhesive therebetween.

[0078] In addition, the support portion 120 and the flange portion 130 may be formed of a non-magnetic body. In addition, the buffer portion 110, the support portion 120, and the flange portion 130 may be integrally formed of a material having a buffering property such as rubber.

[0079] It is also possible to form an external thread as a first thread on the outer peripheral surface of the support portion 120, and form an internal thread as a second thread that meshes with the external thread of the support portion 120 on the inner peripheral surface of the field component 10. In the case of such a structure, the buffer member 100 is moved in the left-right direction by rotating the support portion 120, and the distance between the buffer portion 110 and the armature 20 is adjusted. Therefore, the position of the buffer member 100 can be stably changed by the rotation amount of the support portion 120. In addition, the position of the buffer member 100 can be finely adjusted.

[0080] In addition, the hole 16 may not have the large hole 16 b. In this case, when the buffer member 100 is arranged in the hole 16 , the flange portion 130 is in contact with the second surface 12 of the field member 10 .

[0081] In addition, if Fig.11As shown, the second surface 12 may be a surface adjacent to the first surface 11. In this case, the hole 16 extends in a direction inclined with respect to the left-right direction.

[0082] The brake device 8 may be a disc brake or a drum brake.

[0083] In the description of the operation of the brake device 8, an example is described in which the armature 20 is relatively close to the first surface 11 of the field component 10 by the movement of the field component 10. Depending on the type or mechanism of the brake device 8, the armature 20 may be close to the first surface 11 of the field component 10 by the movement of the armature 20. In addition, the armature 20 may be close to the first surface 11 of the field component 10 by the movement of the field component 10 and the armature 20. That is, bringing the armature 20 close to the first surface 11 includes moving at least one of the field component 10 and the armature 20 to bring the armature 20 close to the first surface 11.

[0084] Hereinafter, each aspect of the present disclosure will be collectively described as a supplementary note.

[0085] (Note 1)

[0086] A braking device comprising:

[0087] A field component having a first surface and a second surface, and having a hole penetrating from the first surface to the second surface;

[0088] an electromagnetic coil disposed on the field member;

[0089] an armature disposed opposite to the first surface and close to the first surface when the electromagnetic coil is energized;

[0090] a force applying portion, disposed between the armature and the field component, and applying force to the armature in a direction away from the first surface; and

[0091] The buffer member is formed to be insertable into the hole from the second surface toward the first surface and has a buffer portion arranged at one end. The buffer member is arranged in the hole so that the armature contacts the buffer portion when the armature approaches the first surface.

[0092] (Note 2)

[0093] The braking device according to claim 1, wherein:

[0094] The buffer member includes a supporting portion that supports the buffer portion.

[0095] The support portion is formed of a magnetic body.

[0096] (Note 3)

[0097] The braking device according to claim 2, wherein:

[0098] The support portion is formed from the same material as the field component.

[0099] (Note 4)

[0100] The braking device according to any one of claims 1 to 3, wherein:

[0101] The buffer member includes a supporting portion that supports the buffer portion.

[0102] A first thread is formed on the outer peripheral surface of the support portion,

[0103] A second thread meshing with the first thread is formed on the inner circumferential surface of the hole.

[0104] (Note 5)

[0105] The braking device according to any one of claims 1 to 4, wherein:

[0106] The buffer member includes a flange portion that contacts the field member when the buffer member is disposed in the hole, thereby restricting movement of the buffer member in a direction approaching the armature.

[0107] (Note 6)

[0108] The braking device according to any one of claims 2 to 5, wherein:

[0109] The buffer portion is supported by the support portion by being fitted into the support portion.

[0110] (Note 7)

[0111] A buffer component is used for a brake device, the brake device comprising: a field component having a first surface and a second surface, and having a hole extending from the first surface to the second surface; an electromagnetic coil disposed on the field component; an armature disposed opposite to the first surface and approaching the first surface when the electromagnetic coil is energized; and a force applying portion disposed between the armature and the field component and applying force to the armature in a direction away from the first surface, wherein:

[0112] The buffer member is formed to be insertable into the hole from the second surface toward the first surface and has a buffer portion disposed at one end. The buffer member is disposed in the hole so that the armature contacts the buffer portion when the armature moves in a direction approaching the first surface.

Claims

1. A braking device comprising: A field component having a first surface and a second surface, and having a hole penetrating from the first surface to the second surface; an electromagnetic coil disposed on the field member; an armature disposed opposite to the first surface and close to the first surface when the electromagnetic coil is energized; a force applying portion, disposed between the armature and the field component, and applying force to the armature in a direction away from the first surface; as well as The buffer member is formed to be insertable into the hole from the second surface toward the first surface and has a buffer portion arranged at one end. The buffer member is arranged in the hole so that the armature contacts the buffer portion when the armature approaches the first surface.

2. The braking device according to claim 1, wherein: The buffer member includes a supporting portion that supports the buffer portion. The support portion is formed of a magnetic body.

3. The braking device according to claim 2, wherein: The support portion is formed from the same material as the field component.

4. The braking device according to any one of claims 1 to 3, wherein: The buffer member includes a supporting portion that supports the buffer portion. A first thread is formed on the outer peripheral surface of the support portion, A second thread meshing with the first thread is formed on the inner circumferential surface of the hole.

5. The braking device according to any one of claims 1 to 4, wherein: The buffer member includes a flange portion that contacts the field member when the buffer member is disposed in the hole, thereby restricting movement of the buffer member in a direction approaching the armature.

6. The braking device according to any one of claims 2 to 4, wherein: The buffer portion is supported by the support portion by being fitted into the support portion.

7. A buffer component for a brake device, the brake device comprising: a field component having a first surface and a second surface, and having a hole extending from the first surface to the second surface; an electromagnetic coil disposed on the field component; an armature disposed opposite to the first surface and approaching the first surface when the electromagnetic coil is energized; and a force applying portion disposed between the armature and the field component and applying force to the armature in a direction away from the first surface, wherein: The buffer member is formed to be insertable into the hole from the second surface toward the first surface and has a buffer portion disposed at one end. The buffer member is disposed in the hole so that the armature contacts the buffer portion when the armature moves in a direction approaching the first surface.

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