JPH0214305Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a brake device for a dehydration motor that rotates a dehydration tank.

(B) Prior art The Japanese Utility Model Application Publication No. 1980-80987 is presented as a conventional device, and this will be explained based on Fig. 1 (disassembled perspective view). This is a dewatering motor that rotates a dehydrating tank at high speed and performs centrifugal dehydration by connecting a rotating shaft 3 to the rotary shaft 3.
4 is a brake drum fixed to the dehydration tank 2, 5 is a bracket for the motor 1, 6 is a key-shaped spindle hole made of a circular hole and a square hole drilled in the upper surface of this bracket 5, and 7 is this spindle. This is a seat pushing part that reinforces the periphery of the hole 6.

Reference numeral 8 denotes a brake lever formed in a curved manner so as to face the periphery of the drum 4, and a lining 9 that presses against the drum 4 to apply the brake is attached to the curved portion, and a downward supporting shaft 10 is formed at the base end. It is inserted into the support shaft hole 6, and a brake wire (not shown) and a brake spring (not shown) are fixed to the tip. The brake spring biases the lining 9 so that it is always in pressure contact with the drum 4, and the brake wire resists the spring biasing force and pulls the lining 9 away from the drum 4 when the dewatering top lid is closed, and when the lid is opened. The slack allows the lining 9 to come into pressure contact with the drum 4.

Here, the support shaft 10 is formed by punching and bending, and at the same time, a pair of bent pieces 11, 11 and punched holes 12, 12 are formed in the lower part thereof, respectively, extending outward. And the support shaft 10 and the bent pieces 11, 11
is inserted into the key-shaped support shaft hole 6 from above, shifted slightly toward the circular hole side, and then rotated slightly. Then, the support shaft 10 is located approximately at the center of the circular hole, the bent pieces 11, 11 are located on the inner surface of the support shaft hole 6, and the lever 8 is rotatable so as to sandwich the hole edge of the support shaft hole 6 from above and below. Supported by

The bending dimension of the support shaft 10 may vary during processing, resulting in looseness or heavy lever rotation. Therefore, conventionally the brake lever 8
An adjustment washer 13 is inserted between the upper surface of the hole edge of the support shaft hole 6 and the upper surface of the hole edge of the support shaft hole 6. However, this washi 13
However, it was not possible to sufficiently adjust the occurrence of rattling and increase in sliding resistance. On the contrary, it was necessary to increase the accuracy of bending the support shaft 10.

(c) Purpose of the invention The present invention is designed to maintain the sliding resistance of the lever almost constant even if the bending accuracy of the spindle does not increase, or even if it decreases.

(d) Structure of the device The device of the present invention involves inserting both ends of a leaf spring into a pair of punched holes formed to form a support shaft and a pair of bent pieces in a brake lever, and elastically abutting the outer surface of a bracket. This is a brake device in which a stopper piece is formed on the leaf spring to be engaged with the edge of a pair of punched holes. That is, the leaf spring elastically biases the brake lever so as to always lift it, and the pair of bent pieces abuts against the edge of the support shaft hole of the bracket from the inner side with a substantially constant elasticity, so that when the lever rotates, The sliding resistance is kept almost constant. Therefore, even if the dimensions of the support shaft are a little rough, no rattling or the like will occur.

(E) Example The present invention uses a leaf spring 1 instead of the conventional washer 13.
4, and will be explained below based on FIGS. 2 and 3.

The leaf spring 14 has an elongated shape, and has downward dowels 15, 15 formed near both ends, and upwardly cut and raised stopper pieces 16, 16 at positions sandwiching the center. As shown by the arrow in the figure, one end of the leaf spring 14 is inserted into one punched hole 12 of the brake lever 8 from below, and then inserted into another punched hole 12 from above. As a result, the leaf spring 14 rides on the upper end of the support shaft 10 and is stopped in a chevron-shaped bent state relative to the brake lever 8. Stopper pieces 16, 16
is engaged with the hole edge of each punched hole 12, 12, and prevents the leaf spring 14 from moving in the direction in which it comes off (left and right direction).

After stopping the leaf spring 14, the brake lever 8 is constructed by inserting the support shaft 10 and bent pieces 11, 11 from above into the key-shaped support shaft hole 6, and slightly shifting them toward the circular hole side of the support shaft hole 6, as in the conventional case. , and rotated a little further. Then,
The support shaft 10 is located approximately at the center of the circular hole, and the bent piece 1
1 and 11 are located on the inner surface of the hole edge of the spindle hole 6. Furthermore, since the dowels 15 and 15 of the leaf spring 14 are in elastic contact with the upper surface of the bracket 5, the lever 8
Forces the entire body upward. As a result, bent piece 1
1 and 11 elastically abut against the inner surface of the hole edge of the spindle hole 6. This contact force becomes the sliding resistance of the lever 8,
This force is kept substantially constant by the elasticity of the leaf spring 14. Further, when the dimension of the support shaft 10 is large, the leaf spring 14 changes the amount of deflection to absorb the error.

(f) Effects of the invention This invention does not reduce assembly performance even if the machining accuracy is made rougher, and also allows the brake lever to operate relatively stably, providing a brake device with uniform performance. be.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of a conventional brake device.
FIG. 2 is an exploded perspective view of the main parts of the device of the present invention, and FIG. 3 is a sectional view of the main parts. 1...Motor, 4...Brake drum, 5...
Bracket, 6... Support shaft hole, 8... Brake lever, 10... Support shaft, 11... Bending piece, 12... Punching hole, 14... Leaf spring, 16... Stopper piece.

Claims (1)

[Scope of utility model registration request] A brake drum is fixed to the rotating shaft of a dehydration motor that rotates the dehydration tank, a brake lever is pivotally supported in the shaft hole of the bracket of the dehydration motor, and a frictional force is applied to the brake drum by the brake lever as appropriate. In a device that applies a brake, the brake lever has a support shaft that is bent and located in the support shaft hole, and a pair of bent pieces that are bent at the bottom of the support shaft and located on the inner surface of the bracket. , a pair of punched holes for forming a support shaft and a bent piece are provided, and both ends of a leaf spring are inserted through the pair of punched holes and elastically abut against the outer surface of the bracket. A brake device for a dewatering motor, characterized in that a stopper piece is formed to be locked on the edge of a punched hole.