Brake motor and method for manufacturing brake motor

Patent metadata

Field	Value
Publication number	US-2019238027-A1
Application number	US-201716317962-A
Country	US
Kind code	A1
Filing date	Jul 13, 2017
Priority date	Jul 15, 2016
Publication date	Aug 1, 2019
Grant date	—

Abstract

A brake motor is provided with a braking mechanism comprising: a motor cover that is provided with an outer wall which is provided such that the inner diameter of an inner peripheral portion thereof increases with proximity to one side in the axial direction from the other side; a drum member that is provided with an outer peripheral portion which is located radially inward of the inner peripheral portion of the outer wall and which faces the inner peripheral portion; and a brake shoe that is mounted on the outer peripheral portion. The inner peripheral portion is provided with a blast-treated portion which is blast-treated upon impact by media which contains large amounts of sharp edges among media which contains large amounts of sharp edges and media which contains large amounts of non-sharp edges.

First claim

1 . A brake motor comprising a brake mechanism that supplies a braking force to rotations of a motor shaft, wherein
the brake motor includes: a motor cover including an outer wall portion that is provided so as to increase the inner diameter of an inner peripheral portion thereof with proximity to one side in the axial direction from the other side; a drum member including an outer peripheral portion that is located radially inward relative to the inner peripheral portion of the outer wall portion and faces the inner peripheral portion; a brake shoe that is attached on the outer peripheral portion, and wherein
the brake shoe and the motor cover are structured so that, in an assemble initial state where the drum member provided with the brake shoe and the motor cover are assembled, the brake shoe is brought into an outer contact state of coming into contact with the inner peripheral portion on one side in the axial direction with a large inner diameter rather than on the other side in the axial direction with a small inner diameter, and
a blast-treated portion blast-treated is provided on the inner peripheral portion of the motor cover.

2 . (canceled)

3 . The brake motor according to claim 1 , wherein
projecting portions that project relative to the other portion of the blast-treated portion and pointed ends each having a pointed shape on the tip side of the projecting portions are provided in the blast-treated portion.

4 . The brake motor according to claim 1 , wherein
the blast-treated portion is formed so as to make the degree of the blast treatment smaller on the other side in the axial direction with a small inner diameter than on one side in the axial direction with a large inner diameter, the one side causing the outer contact state.

5 . The brake motor according to claim 1 , wherein
a spiral-shaped spiral groove that is recessed relative to the other portion of the inner peripheral portion and travels in the axial direction along the inner peripheral portion is provided in the inner peripheral portion.

6 . A method for manufacturing a brake motor including a brake mechanism that supplies a braking force to rotations of a motor shaft, the method comprising:
a motor cover forming step that forms a motor cover including an outer wall portion that is provided so as to increase the inner diameter of an inner peripheral portion thereof with proximity to one side in the axial direction from the other side and configuring the brake mechanism; a blast treatment step that blast-treats the inner peripheral portion upon impact by media that contain large amounts of sharp edges among media; a drum member forming step that forms a drum member including an outer peripheral portion that is located radially inward relative to the inner peripheral portion of the outer wall portion and faces the inner peripheral portion and configuring the brake mechanism; a brake shoe attaching step that attaches a brake shoe configuring the brake mechanism on the outer peripheral portion; and an assembling step that assembles the motor cover and the drum member in a state where the brake shoe faces the inner peripheral portion, in an assemble initial state, the brake shoe is brought into an outer contact state of coming into contact with the inner peripheral portion on one side in the axial direction with a large inner diameter rather than on the other side in the axial direction with a small inner diameter.

7 . The brake motor according to claim 2 , wherein
projecting portions that project relative to the other portion of the blast-treated portion and pointed ends each having a pointed shape on the tip side of the projecting portions are provided in the blast-treated portion.

8 . The brake motor according to claim 2 , wherein
a spiral-shaped spiral groove that is recessed relative to the other portion of the inner peripheral portion and travels in the axial direction along the inner peripheral portion is provided in the inner peripheral portion.

9 . The brake motor according to claim 3 , wherein
a spiral-shaped spiral groove that is recessed relative to the other portion of the inner peripheral portion and travels in the axial direction along the inner peripheral portion is provided in the inner peripheral portion.

10 . The brake motor according to claim 4 , wherein
a spiral-shaped spiral groove that is recessed relative to the other portion of the inner peripheral portion and travels in the axial direction along the inner peripheral portion is provided in the inner peripheral portion.

Assignees

• Kito Kk

Inventors

• MUKAWA Nobuyoshi
• Hirota Teruaki

Classifications

• F16D2055/0075

  Constructional features of axially engaged brakes · CPC title

• F16D69/02

  Composition of linings {; Methods of manufacturing} · CPC title

• H02K7/125

  magnetically influenced · CPC title

• F16D55/04

  by moving discs or pads away from one another against radial walls of drums or cylinders · CPC title

• H02K7/1028 Primary

  axially attracting the brake armature in the frontal area of the magnetic core · CPC title