JPH0228735B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brake device that applies a brake at appropriate times to a motor that rotationally drives a dehydration tank or the like of a washing machine.

In this type of device, a brake lever equipped with a shoe is disposed opposite to a brake wheel fixed to a motor rotating shaft, and the shoe and lever are biased by a spring in the direction of pressing against the wheel.
Connect the operating wire to the lever and pull it away from the wheel against the spring. When the lid of the dehydration tank is opened, the operating wire is loosened, and the spring presses the shoe against the wheel to apply the brakes. Here, the shoe comes into contact with the rotating wheel when the brake is applied, and even when the motor is rotating without applying the brake, it inevitably vibrates due to the eccentric load, so it must be firmly attached to the lever. Conventionally, such methods as adhesive, strong fitting, and screw fixing were used for attachment. In addition, the actuation wire was fixed to the lever by crimping it, hooking it and gluing it, or hooking it to a separately attached elastic part to suppress the contact noise with the lever that occurs when it vibrates. .

The object of the present invention is to firmly attach the shoe to the lever with a simple structure, suppress contact noise, and omit caulking work, gluing work, and separate elastic parts when attaching the actuating wire. This will be explained below based on the drawings. Reference numeral 1 denotes a brake stand disposed below a dehydration tank (not shown) of a washing machine, with a motor rotating shaft 2 rotatably protruding from the center of the top surface and connected to the dehydration tank, with a pivot support on one side of the top surface. A hole 3 is bored, and an elongated mounting base 4 made of sheet metal is fixed to the other side of the upper surface with one end protruding from the brake base 1. Reference numeral 5 denotes an actuation wire introduced onto the mounting base 4 from its tip end along the mounting base, and fixes the jacket 6 at the tip end of the mounting base 4. The starting end of the operating wire 5 is connected to an opening/closing lid (not shown) of the dehydration tank, so that it is loosened when the lid is opened and pulled when the lid is closed.

Reference numeral 7 designates a dish-shaped brake wheel disposed on the center of the brake stand 1, which is fixed to the rotating shaft 2 and whose outer peripheral side surface forms a braking surface 8.

Reference numeral 9 denotes a bow-shaped brake lever disposed so as to surround the outer periphery of the brake wheel 5, and an engaging pawl 10 formed at the base end thereof is rotatably engaged with the pivot hole 3 via a soundproof body. The bow-shaped main body 11 crosses the mounting base 4, and the drive end 12 is located outside of the mounting base 4. Reference numeral 13 denotes a standing wall formed on the edge of the bow-shaped main body 11 near the braking surface 8;
Two vertical grooves 14, 14 are formed at intervals. 15 is a standing wall 13 of the bow-shaped main body 11
This is a kerf formed on the edge where there is no .

Reference numeral 16 denotes a brake shoe integrally molded from an elastic brake material, which is connected to the vertical wall 13.
It is mounted against the braking surface 8 and has an arcuate shape that matches the vertical wall 13 and the braking surface 8 . Here, the shoe 16 is connected to the lever 9.
The first, second and third protrusions 17, 17, 18 are integrally provided to protrude and fit into the longitudinal grooves 14, 14 and the cut grooves 15, and the first, second protrusions 17, 17 is extended on the bow-shaped main body 11 to form extension parts 19, 19, and the extension parts 19, 19 are connected to each other by the bridge piece 2.
0, a claw portion 21 is integrally provided on this bridge piece 20 in a direction opposite to the extending direction, and this claw portion 21 is locked to the back surface of the vertical wall 13. Note that the bridge piece 20 can be easily bent vertically with fingers. or,
The shoe 16 is integrally provided with a fastening part 22 near the drive end 12.
includes an engaging recess 23 for hooking the operating end of the operating wire 5, which has been made large in diameter in advance, an extending portion 24 extending in the longitudinal direction of the mounting base on the bow-shaped main body 11, and the extending portion 24 and A guide groove 25 for the actuating wire 5 is formed continuously in the recess 23.

Further, the shoe 16 includes ribs 26, 26 that contact the upper end of the standing wall 13 from above, a rib 27 that contacts or faces the lower surface of the bow-shaped main body 11 from below,
Ribs 28 and 29 are provided around the third protrusion 18 and around the recess 23 to abut or face the lower surface of the bow-shaped main body 11 from below.

Therefore, when attaching the shoe 16 to the brake lever 9, the shoe 16 is pressed against the vertical wall 13, and the ribs 26, 27, 28, 29 and the extended portions 19, 19, 24 are used to apply the brake. The lever 9 is clamped and stopped from above and below, and the first, second and third protrusions 17, 17, 18 are inserted into the vertical groove 1 which is a blocking part.
4, 14 and the cut groove 15 to form a contact relationship in the rotational direction, and in this state, bend the bridge piece 20 with your fingers to lock the claw part 21 to the back surface of the vertical wall 13, which is the locking part. It is then stopped in the radial direction.

Further, a spring 30 is suspended between the drive end 12 and the base end of the mounting base 4 to always elastically bias the brake lever 9 and shoe 16 toward the braking surface 8.

Next, to explain the operation of the present invention, when the opening/closing lid is in the open state, the operating wire 5 is slack as shown in FIG. The shoe 16 is in pressure contact with the braking surface 8. If this occurs immediately after the lid is opened, a braking force is applied to the braking surface 8 rotating in the right direction. On the other hand, the shoe 16 receives rotational force from the braking surface 8, but the first, second and third projections 17, 17, 18
Since it is fitted into and abutted on each of the grooves 14, 14, 15, which are blocking parts, it is integrated with the brake lever 9 and does not fall off, and continues to apply braking force to the braking surface 8.

When the lid changes from the open state to the closed state, the actuating wire 5 is pulled and rotates the brake lever 9 against the spring 30, causing the shoe 16 to move against the braking surface 8.
pull away from The brake wheel 7 rotates in conjunction with the rotation of the motor. At this time, the shoe 16 is directly and continuously subjected to a pulling force from the actuating wire 5 at the fastening portion 22, and is constantly pressed against the brake lever 9 by this force. Therefore, during rotation of the motor, severe vibrations occur due to eccentric loads, etc., and the locking state between the claw portion 21 and the vertical wall 13, which is the locking portion, and the locking state between the protrusions 17, 17, 18 and the blocking portions, etc. Even if the fitting condition with the grooves 14, 14, 15 becomes loose, the shoe 16 is held by the pulling force of the brake lever 9 and will not fall off.

As described above, the brake device according to the present invention has an elastic shoe attached to the brake lever that presses against the brake wheel, and the shoe is provided with a locking portion such as a standing wall and a blocking portion such as a groove. A pawl, a protrusion, and a fastening part are integrally provided, and the brake lever is placed on the facing surface of the brake wheel, such as a vertical wall, and is stopped by locking the pawl to the locking part, and the protrusion is fixed. The blocking part is brought into contact with the brake wheel rotation direction, and the actuating wire, which is disposed in the direction of pulling the shoe away from the brake wheel against the spring, is fastened to the above-mentioned fastening part, so that the actuating wire is When it is pulled, the shoe can be crimped onto the lever and firmly attached, so even if severe vibration occurs when the motor rotates, there is no accident of the shoe falling off despite the simple structure. Further, since the fastening portion is integrally provided with the shoe, separate parts and their installation work can be omitted. Furthermore, since the shoe has elasticity, the actuating wire does not generate contact noise at the fastening portion, and crimping and gluing operations can be omitted.

[Brief explanation of drawings]

Fig. 1 is a plan view of the device of the present invention, Fig. 2 is a perspective view of the brake lever, Fig. 3 is a perspective view of the shoe, Fig. 4 is a sectional view taken along line A-A in Fig. 1, and Fig. 5 is a It is a BB sectional view of the figure. 2... Motor rotating shaft, 5... Operating wire, 7
... Brake wheel, 9 ... Brake lever,
13... Standing wall which is a locking part, 14, 15... Groove which is a blocking part, 16... Shu, 17, 18... Projection, 21... Claw part, 22... Fastening part.

Claims (1)

[Claims] 1. In the case where a brake is applied in a timely manner to a motor that rotationally drives a driven body such as a dehydration tank, a brake wheel is fixed to the rotating shaft of the motor, and an elastic shoe is attached to this brake wheel with a spring. A brake lever that is brought into pressure contact with the brake wheel is provided, and the above-mentioned shoe is arranged on the surface of the brake lever facing the brake wheel, and the shoe has a claw portion that is engaged with the engagement portion of the brake lever, and a brake lever that is engaged with the engagement portion of the brake lever. A protrusion that comes into contact with the blocking part of the lever in the direction of rotation of the brake wheel, and a fastening part that fastens the actuating wire disposed in the direction of pulling the shoe away from the brake wheel against the spring are integrated. A brake device characterized by being provided with.