Electromagnetic brake

Details Electromagnetic brake Electromagnetic brake

1998-12-28

2002-01-29

Oberleitner, Robert J. (Department: 3613)

Brakes

Operators

Electric

C188S073390

Reexamination Certificate

active

06341676

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an electromagnetic brake mainly used for a hoist gear.
2. Description of the Related Art
As a conventional electromagnetic brake has been used for a hoist gear, etc., a brake having a construction as shown in FIG.
9
and
FIG. 10
is known.
That is to say, as shown in FIG.
9
and
FIG. 10
, in a conventional electromagnetic brake, a U-shaped caliper
61
and an electromagnet portion
62
form a unit
63
, and this unit
63
is attached to a fixation member
65
(for attachment) through a floating pin
64
.
A brake shoe
66
is attached to an end of the U-shaped caliper
61
through an adjusting screw
67
, etc., and another brake shoe
68
is attached to an end of a push rod
69
. This push rod
69
is fixed to a movable iron core
70
of the electromagnet portion
62
, and the other end of the caliper
61
is fixed and connected to a fixed iron core
72
of the electromagnet portion
62
through an attachment bolt
71
.
When the electromagnet portion
62
is switched on, a braked body
73
such as a disk, shown with a two-dot broken line, pressed by the above-mentioned pair of brake shoes
66
and
68
, performs brake-working. In this case, pressing force G of the brake shoe
66
, pressing force H of the brake shoe
68
, and tangent force (working in a direction at right angles with surface of
FIG. 9
or
FIG. 10
) are transmitted through the adjusting screw
67
, the caliper
61
, the push rod
69
, and the movable iron core
70
.
However, in a conventional electromagnetic brake as described above, a U-shaped large-volume caliper of block, having sufficient strength and rigidity, is required. And, there is a problem that construction of the brake becomes complicated, and width dimension of the brake in FIG.
9
and
FIG. 10
becomes enlarged.
It is therefore an object of the present invention to provide an electromagnetic brake with which the large-volume caliper of block is not necessary, light-weight apparatus in total and simplification of the construction can be obtained.


REFERENCES:
patent: 3719257 (1973-03-01), Maurice
patent: 4219106 (1980-08-01), Lupertz et al.
patent: 4220224 (1980-09-01), Karasudani
patent: 4222465 (1980-09-01), Haraikawa et al.
patent: 4321984 (1982-03-01), Burgdorf et al.
patent: 4341289 (1982-07-01), Smith
patent: 4553456 (1985-11-01), Mery
patent: 4573554 (1986-03-01), Ritsema
patent: 4611693 (1986-09-01), Wang
patent: 4775034 (1988-10-01), Pachner et al.
patent: 4823920 (1989-04-01), Evans
patent: 5022500 (1991-06-01), Wang
patent: 5167400 (1992-12-01), Gazel-Anthoine
patent: 5259484 (1993-11-01), Idesawa et al.
patent: 5582277 (1996-12-01), Heidenreich et al.
patent: 5944150 (1999-08-01), Hikari
patent: 9-255289 (1997-09-01), None

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