JPH0182338U

JPH0182338U -

Info

Publication number: JPH0182338U
Application number: JP1987177417U
Authority: JP
Priority date: 1987-11-20
Filing date: 1987-11-20
Publication date: 1989-06-01

Description

[Brief explanation of the drawing]

第１図ないし第４図は本考案に係る電磁ドラム
ブレーキの実施例を示し、第１図はその一部破断
正面図、第２図は第１図のＡＡ断面図、第３図は
第１図の矢印Ｂ方向から見たフイールドコアの平
面図、第４図は制動解放装置の拡大縦断面図であ
る。１……ブレーキカバー、１ｂ……円筒部、１ｄ
……内周面、２……モータ軸、５……ブレーキド
ラム、６……電磁ドラムブレーキ、７……フイー
ルドコア、７ａ……磁気吸着面、７ｂ……背面、
８……電磁コイル、１１……ブレーキシユー、１
２……アーマチユア、１５……制動ばね、１８…
…ボルト孔、１９……ボルト、１９ａ……頭部、
１９ｂ……ねじ部、２０……ねじ孔、２１……解
放ばね、２２……工具挿入孔、Ｇ……アーマチユ
アの平面と磁気吸着面との間隙。 1 to 4 show an embodiment of the electromagnetic drum brake according to the present invention, FIG. 1 is a partially cutaway front view thereof, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. FIG. 4 is a plan view of the field core viewed from the direction of arrow B in the figure, and an enlarged longitudinal sectional view of the brake release device. 1...Brake cover, 1b...Cylindrical part, 1d
... Inner peripheral surface, 2 ... Motor shaft, 5 ... Brake drum, 6 ... Electromagnetic drum brake, 7 ... Field core, 7a ... Magnetic adsorption surface, 7b ... Back side,
8... Electromagnetic coil, 11... Brake shoe, 1
2... Armature, 15... Braking spring, 18...
...Bolt hole, 19...Bolt, 19a...Head,
19b...Threaded portion, 20...Threaded hole, 21...Release spring, 22...Tool insertion hole, G...Gap between the plane of the armature and the magnetic attraction surface.

Claims

[Scope of utility model registration request]

A field core with an electromagnetic coil inscribed therein and supported by the inner peripheral surface of the brake cover on the motor side and whose front face is a magnetic attraction surface, and a field core located between this field core and the brake drum on the motor shaft side in the radial direction of the brake drum. an armature equipped with a brake shoe that is movably supported and attached to the circumferential surface of a brake drum, and the armature is biased toward the brake drum to create a predetermined gap between the plane thereof and the magnetic attraction surface. In the electromagnetic drum brake equipped with a braking spring that is formed, when the field core is not fixed to the brake cover, the reaction force of the elastic force of the braking spring that presses the brake shoe against the circumferential surface of the brake drum The back surface of the field core on the side opposite to the armature is pressed against the inner circumferential surface of the brake cover, and a bolt that can be rotated from the outside of the brake cover is inserted into a bolt hole provided in the field core. An electromagnetic drum brake characterized in that a spring member is provided, the threaded end of which is inserted into and removed from a threaded hole provided in the armature, and which biases the bolt in the direction of removal, restricting the bolt from coming off from the bolt hole.