JPH09217771A - Combination clutch brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combination clutch brake having low noise by eliminating noise to be caused by backlash of a clutch part to be connected to a driving shaft from a flywheel. SOLUTION: In a combination-type clutch brake provided with a piston disc 7 arranged between a clutch disc 4 and a brake disc 5, and for pressing a clutch friction plate 32 connected to a driving the flywheel 3 by releasing pressing of the brake friction plate 11 by supplying compressed air to a hollow chamber 8 between the brake disk 5 and the piston disc 7, the clutch friction plate 32 is fixed to a spring body 31, the spring body 31 is fixed to the driving flywheel 3, and backlash is eliminated from a connecting mechanism of the clutch friction plate 32 to the driving the flywheel 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination type clutch / brake which applies a driving force or a braking force to a drive shaft by a piston disc driven by receiving compressed air and a spring load.

[0002]

2. Description of the Related Art As a combination type clutch / brake used in a press or the like, there is one having a structure as shown in FIG. 4, for example. FIG. 4 shows a schematic cross section thereof. In the figure, 1 is a housing of a press machine, 2 is a drive shaft (crankshaft) of the press machine, and 3 is a flywheel which is rotationally driven by a prime mover such as a motor (not shown). . The crankshaft 2 has a clutch disc 4
Further, the brake disc 5 is fixed, and the flywheel 3 is rotatably attached via a bearing 6.

The hub 4 is attached to the hub 41 of the clutch disc 4.
1. A piston disc 7 is slidably movable in the axial direction.
Are engaged with each other, and one surface of the clutch disk 4 is opposed to the other surface of the brake disk 5. A space is formed between the brake disc 5 and the piston disc 7 to form a hollow chamber 8. The hollow chamber 8 is a compressed air passage or pipe 2 formed inside the crankshaft 2.
It is connected to 1.

A spring 9 is arranged between the clutch disc 4 and the piston disc 7, and the piston disc 7 is pressed against the brake disc 5 side by the spring 9. Compressed air passage 2 inside crankshaft 2
Reference numeral 1 is connected to a pneumatic pressure supply / exhaust device (not shown) via a rotary joint 10, and compressed air supplied by the pneumatic pressure supply / exhaust device is sent to the hollow chamber 8 through the rotary joint 10 and the compressed air passage 21, The disk 7 is slid toward the clutch disk 4 side against the action of the spring 9.

A clutch friction plate 15 connected to the flywheel 3 is arranged between an end peripheral surface of the clutch disk 4 and a peripheral surface of the piston disk 7 facing the peripheral surface, and the piston disk 7 is a spring. When slidingly moving toward the clutch disc 4 side against the action of 9, the clutch friction plate 15 is pressed against the clutch disc 4 and the piston disc 7 to transmit the rotation of the flywheel 3 to the crankshaft 2 and The shaft 2 is driven to rotate.

As shown in a partial plan view of FIG. 3, the clutch friction plate 15 is formed in a ring shape with external teeth 18, and is fixed to the flywheel 3 with bolts 16 or the like (FIG. 4). (Refer to FIG. 1) It is connected to the flywheel 3 by meshing with a gear 14 having internal teeth 17. In this case, the outer teeth 18 and the inner teeth 1 are arranged so that the clutch friction plate 15 can be moved.
A backlash 19 is provided at the meshing portion with 7.

When the compressed air in the hollow chamber 8 passes through the compressed air passage 21 rotary joint 10 and is discharged by the pneumatic supply / discharge device, the piston disc 7 slides toward the brake disc 5 by the action of the spring 9. Moving. A brake pin 1 fixed to the housing 1 is provided between the end peripheral surface of the brake disc 5 and the end peripheral surface of the piston disc 7.
2, a ring-shaped brake friction plate 11 fitted so as to be slidably movable in the axial direction is arranged, and the piston disc 7 is separated from the clutch friction plate 15 by the action of the spring 9 and slidably moved to the brake disc 5 side. When this is done, the brake friction plate 11 is attached to the brake disc 5 and the piston disc 7.
And are pressed to stop the rotation of the crankshaft 2.

[0008]

By the way, in the clutch / brake constructed as described above, the clutch portion connected from the flywheel to the drive shaft such as the crankshaft is provided with a gear or a torque pin as described above. The backlash is provided so that the clutch plate can be moved. This backlash is a factor that raises the noise particularly during no-load operation of a press machine or the like, and the development of clutches and brakes that reduce this noise is desired.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to eliminate a noise caused by backlash of a clutch portion connected from a flywheel to a drive shaft and to provide a low noise combination type clutch / brake. To aim.

[0010]

This object is provided with a clutch disc, a brake disc, and a piston disc disposed between the clutch disc and the brake disc. The brake friction plates are pressed against each other by a spring force, and the piston disc is operated toward the clutch disc side by the compressed air supplied between the brake disc and the piston disc, and is driven by the piston disc and the clutch disc. In a combination type clutch / brake in which a clutch friction plate connected to a flywheel is pressed, the clutch friction plate is formed on a spring body fixed to the drive flywheel. .

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The combination type clutch / brake according to the present invention is the same as the conventional combination type clutch / brake described with reference to FIG. 4, except for the coupling mechanism between the clutch friction plate and the drive flywheel. The structure is similar to that of a brake, and it is mounted on a crankshaft, which is a drive shaft of a press or the like, similarly to the combination type clutch / brake described with reference to FIG.

The coupling mechanism between the clutch friction plate and the drive flywheel is formed by a leaf spring, and the clutch friction plate is fixed to this leaf spring, and one end of this leaf spring is fixed to the drive flywheel. The clutch friction plate is connected to the drive flywheel.

As described above, since the coupling mechanism between the clutch friction plate and the drive flywheel is composed of the spring body, the clutch friction plate and the drive flywheel do not need to be backlashed at the coupling portion and the clutch friction can be achieved. The plates can be moved, and a combination type clutch / brake that reduces noise is obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same parts as those in FIG. 4 are designated by the same reference numerals, and detailed description of the overlapping parts will be omitted. FIG.
FIG. 2 is a cross-sectional view showing the configuration of the combination type clutch / brake of the embodiment of the present invention, and FIG. 2 is a partial plan view showing the coupling mechanism between the clutch friction plate and the drive flywheel of the embodiment shown in FIG.

In FIG. 1, 1 is a housing of a press machine, 2 is a drive shaft (crankshaft) of the press machine, 3 is a drive flywheel, 4 is a clutch disc, 5 is a brake disc, 6 is a bearing, and 7 is a piston disc. , 8 is a hollow chamber, 9 is a spring, 10 is a rotary joint, 11 is a brake friction plate, 12 is a brake pin, 16 is a bolt,
Reference numeral 21 is a compressed air passage, 41 is a hub of the clutch disc 4, which are configured and operate in the same manner as described with reference to FIG. 4, and therefore detailed description thereof will be omitted.

Numeral 32 is arranged between the peripheral surface of the end portion of the clutch disk 4 and the peripheral surface of the piston disk 7 opposed to the peripheral surface, and the piston disk 7 moves toward the clutch disk 4 side against the action of the spring 9. When frictionally slid, the clutch disc 4 and the piston disc 7 press-contact the clutch friction plate for transmitting the rotation of the flywheel 3 to the crankshaft 2. The end edge 31 of the friction plate 31 is fixed to the flywheel 3, A spring body that connects the friction plate 31 to the flywheel 3.

The spring body 31 has an outer diameter substantially equal to the outer diameter of the flywheel 3 and is formed in a ring shape with a predetermined width.
The leaf spring is formed with a notch 33 as shown in FIG. The clutch friction plates 32 are fixed to both side surfaces of the end of the leaf spring piece between the notches 33.

Although the leaf spring 31 is formed in a ring shape in this embodiment, it is needless to say that the leaf spring 31 may be appropriately divided and formed.

[0019]

As described above, according to the present invention, since the coupling mechanism between the clutch friction plate and the drive flywheel is composed of the spring body, the mechanism has a small number of parts, is extremely simple, and is easy to assemble. The cost can be reduced.
Further, the clutch friction plate can be moved without the need for backlash at the connecting portion between the clutch friction plate and the drive flywheel, and a combination type clutch / brake in which noise is reduced can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a combination type clutch / brake according to an embodiment of the present invention.

FIG. 2 is a plan view showing a part of a coupling mechanism of a clutch unit of the embodiment shown in FIG.

FIG. 3 is a plan view showing a part of a conventional clutch portion coupling mechanism.

FIG. 4 is a sectional view showing a configuration of a conventional combination type clutch / brake.

[Explanation of symbols]

 1 Housing of press machine 2 Drive shaft (crank shaft) 3 Drive flywheel 4 Clutch disc 5 Brake disc 6 Bearing 7 Piston disc 8 Hollow chamber 9 Spring 10 Rotary joint 11 Brake friction plate 12 Brake pin 21 Compressed air passage 31 Spring body ( Leaf spring) 32 clutch friction plate

Claims (1)

[Claims] 1. A clutch disc, a brake disc, and a piston disc disposed between the clutch disc and the brake disc, wherein the brake disc and the piston disc press a brake friction plate by a spring force. In addition, the piston disc is operated toward the clutch disc side by the compressed air supplied between the brake disc and the piston disc, and the clutch is connected to the drive flywheel by the piston disc and the clutch disc. A combination type clutch / brake in which a friction plate is pressure-contacted, wherein the clutch friction plate is formed on a spring body fixed to the drive flywheel.