JPS6227358Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-stage piston type clutch used in press machines and the like.

Conventionally, clutches used in press machines, etc., alternately have a plurality of inner friction plates provided on the shaft side and a plurality of outer friction plates provided on the flywheel side, and these clutches are used as a clutch that moves along the shaft. Power was transmitted by pressing with a piston. The power transmitted is determined by the number of friction plates, their average rotating diameter, and the pushing force of the piston, but usually the friction plates have sufficient capacity, so if you want to increase the clutch torque, you increase the area of the piston. Or increase the pressure of the air supplied to it.

However, if the piston diameter is increased to increase the area, the moment of inertia will increase, the ability to stop the shaft will decrease, and the shape will become larger, which will affect the overall structure of the machine and increase the air pressure. It had various drawbacks, such as not being able to use a normal factory airline and requiring a separate compressor.

The purpose of the present invention is to eliminate these drawbacks, to create a clutch that can use a normal factory airline, and that can increase the output of the clutch with a small piston.
The object of the present invention is to provide a stepped piston type clutch.
Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a flywheel 9 driven from a power source is rotatably supported by a shaft 1 rotatably supported by a machine body. A first hub 8 is fixed to the shaft 1, and a plurality of external teeth 8a are provided on the outer periphery of the first hub 8.
, and a plurality of clutch inner friction plates 12 having internal teeth that mesh therewith.
A cylindrical housing 9a is fixed to the flywheel 9, the inner periphery of which faces the outer periphery of the first hub 8, a plurality of internal teeth 9b are provided on the inner periphery, and a plurality of external teeth that mesh with the internal teeth 9b are provided on the inner periphery. Two clutch outer friction plates 11 are provided. The outer clutch friction plates 11 and the inner clutch friction plates 12 are fitted alternately adjacent to each other to form a clutch. Adjacent to the first hub 8, the second hub 2 is connected to the shaft 1.
The inner diameter of one side of the outer cylindrical portion of the first piston 3 is fixed to the shaft end of the first piston 3, and the inner diameter of one side of the outer cylindrical portion of the first piston 3 is slidably fitted to the first hub 8 side of the outer periphery. Further, the hole diameter of the first piston 3 is slidably fitted to the outer periphery of the portion of the second hub 8 attached to the shaft 1, so that the first piston 3 is slidable in the axial direction of the shaft 1. First piston 3 and second hub 2
This creates an airtight first air chamber 2a.
The other side of the outer cylindrical portion of the first piston 3 is adjacent to the side of the clutch inner friction plate 12,
When compressed air is supplied to the first air chamber 2a, the clutch inner and outer friction plates 11 and 12 are brought into pressure contact with the side surface of the flywheel 9. A second piston 4 is located on the opposite side of the second hub 2 from the first hub 8.
is slidably fitted in the axial direction, and a cylinder cover 5 fixed to the shaft end of the shaft 1 covers that end surface of the second hub 2, and the second piston 4 and the cylinder cover 5
An airtight second air chamber 2b is formed between the two. A plurality of pins 6 are provided between the first piston 3 and the second piston 4 so as to pass through the second hub 2, fit therein, and be slidable in the axial direction. Therefore, when compressed air is supplied to the second air chamber 2b, the pin 6 slides together with the second piston 4,
The pushing force of the second piston 4 is directly applied to the first piston 3. Air supply holes 7 provided in the body 13 communicate with ventilation holes 7a and 7b to the first and second air chambers 2a and 2b. These air passages are designed to remain airtight even when the cylinder cover 5 rotates together with the shaft 1. second hub 2
The outer periphery on the side opposite to the first hub 8 faces the inner periphery of the brake housing 14 fixed to the body 13, and external teeth 2c and internal teeth 14a are provided there respectively. Friction plate 1
6. When the brake outer friction plates 15 are engaged and fitted alternately and adjacently, and when they are sandwiched between the first piston 3 and the cylinder cover 5, the brake is applied between the shaft 1 and the body 13. It's starting to hang. Since the first piston 3 is always urged in the direction of the cylinder cover 5 by a spring 10 housed in holes 8b provided at multiple locations in the first hub 8, the compressed air in the air supply port 7 can be exhausted. The brakes are always applied.

Next, we will discuss the effect. In a state where compressed air is not yet supplied to the air supply port 7, the shaft 1 is braked and stopped. The flywheel 9 is driven by a power source and rotates around the shaft 1. When compressed air is supplied to the air supply port 7, the air passes through the ventilation holes 7a and 7b, enters the first and second air chambers 2a and 2b, and enters the first and second pistons 3,
Apply pushing force to 4. The pushing force of the second piston 4 is transmitted to the first piston 3 via the pin 6, and the first piston 3 uses the total force of both pushing forces to move the clutch inner and outer friction plates 11, 12 to the flywheel. Press it against the side of 9. Due to the frictional force of the clutch, the rotational torque of the flywheel 9 is transferred to the first hub 8.
is transmitted to the shaft 1 through the shaft 1, and the shaft 1 rotates. The shaft 1 drives a press machine and the like. When the compressed air in the air supply port 7 is exhausted, the first and second pistons 3 and 4 return to their original positions due to the biasing force of the spring 10, and at the same time, the clutch is disengaged and the rotational torque of the flywheel 9 is transmitted to the shaft 1. then spring 10
The first piston 3 pushes the brake inner and outer friction plates 15 and 16 against the cylinder cover 5 due to
to press against. A brake is applied between the shaft 1 and the body 13, and the shaft 1 stops.

As is clear from the above description, according to the present invention, since the piston has a small shape, the overall structure is miniaturized, and the combined force of the two pistons produces a large pushing force, and therefore the transmitted rotational torque of the clutch is reduced. The practical effects and advantages are extremely large, such as the large pressure of compressed air that can be supplied with sufficient effect using a normal factory airline and no special air source required.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main part. 1 is the shaft, 2 is the second hub, 2a is the first air chamber, 2b is the second air chamber, 2c is the external tooth, 3 is the first
, 4 is the second piston, 5 is the cylinder cover, 6 is the pin, 7 is the air supply port, 7a, 7b are the ventilation holes, 8 is the first hub, 8a is the external tooth, 8b is the hole, 9 is the Flywheel, 9a is housing, 1
0 is the spring, 11 is the outer friction plate for the clutch, 12 is the inner friction plate for the clutch, 13 is the fuselage, 14 is the brake housing, 14a is the internal tooth, 15 is the outer friction plate for the brake, 16 is the inner friction plate for the brake. It is.

Claims (1)

[Scope of utility model registration request] A rotatable flywheel is provided around a rotatably provided shaft in the body of a press machine, etc., and the inner periphery of a cylindrical housing fixed to the flywheel and the outer periphery of a first hub fixed to the shaft are provided. The clutch has a plurality of outer friction plates facing each other and having external teeth that mesh with a plurality of internal teeth provided on the inner periphery of the housing, and internal teeth that mesh with a plurality of external teeth provided on the outer periphery of the first hub. A plurality of clutch inner friction plates are provided alternately and adjacently to each other, and a second hub is provided adjacent to the opposite side of the flywheel from the first hub and fixed to the shaft, and the second hub is fixed to the shaft. a first piston that forms an air chamber between them and presses the clutch friction plate; a cylinder cover that covers a portion of the second hub housing the second piston; an air chamber is provided between the cylinder cover and the second piston; , a plurality of pins are provided therein to slide into contact with the first piston and the second piston, and an airtight vent hole is provided that communicates with the two air chambers from an air supply port for supplying compressed air. 2 characterized by
Staged piston type clutch.