JPH11230218A - Clatch/brake device for pressing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a noise generated by a clutch disk when a pressing machine is in idling operation. SOLUTION: Each of clutch disks 9 is formed into a quadrant, and a side plate arranged between the neighboring clutch disks 9 is mounted on a flywheel 7 so as to be in contact with the clutch disks 9. Both side faces of the clutch disk 9 define a press surface which has a tapered surface. During idling operation, the press surface rotates while being urged against a contact surface formed on a side face of the side plate. A guide pin 13 having a collar 13a and being fixed to the flywheel 7 is inserted into the clutch disk 9. Between the clutch disk 9 and the flywheel 7, a dish-shaped spring 14 through which the guide pin 13 passes is mounted to urge the clutch disk 9 in a direction opposite to the flywheel 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press having a combination type clutch / brake, and more particularly to a press / clutch device for a press configured to eliminate noise.

[0002]

2. Description of the Related Art Generally, a clutch / brake device of a mechanical press machine is classified into a combination type in which a clutch disk and a brake disk are mainly set and a separate type in which a clutch device and a brake device are separately provided. Divided. The combination type clutch / brake device can mechanically control the timing of the press machine, can make the brake heat advantageous, and can be manufactured at low cost because the operating cylinder and the solenoid valve are shared. In addition, the separate type clutch / brake device can improve the stopping performance because the weight of the rotating portion is small and the inertia can be reduced.

A clutch / brake device 3 shown in FIGS.
1 shows an example of a conventional combination type, and a flywheel 3 is provided at one end of a crankshaft 32.
3 is rotatably disposed, and a clutch rotating plate 34 supported by a crankshaft 32 is attached to a side portion of the flywheel 33. Also, the crankshaft 3
A rotating plate for brake 35 is supported on the crankshaft 32 at the end of the second shaft 2. A friction surface is formed on the clutch rotating plate 34 and the brake rotating plate 35 so as to face each other, and a clutch disk 36 having a lining stuck to the friction surface of the clutch rotating plate so as to be pressed is disposed. A brake disk 37 having a lining adhered to the friction surface of the brake rotating plate 35 so as to be able to be pressed is arranged. The clutch disc 36 is supported by the flywheel 33 and rotates together with the flywheel 33, and the brake disc 37 is supported by the machine frame 38 and the clutch disc 3
An operating cylinder 39 for alternately pressing and moving the brake disc 6 and the brake disc 37 to the respective rotating plates is disposed between the clutch disc 36 and the brake disc 37 so as to be supported by the crankshaft 32.

The working cylinder 39 is disposed on the brake rotating plate 35 side when the clutch means is pressed against the clutch rotating plate 34 by the inflow of the air means to rotate the crankshaft 32 and the air means is shut off. The brake disk 37 is pressed against the brake rotating plate 35 by the plurality of spring means 40 to stop the rotation of the crankshaft 32.

[0005]

However, in the conventional clutch / brake device 31, the clutch disc 36
Rotates with the flywheel 33 when the clutch disc 36 is attached to the flywheel 33 via a gear or a pin.
6 is configured to be able to advance and retreat with respect to the flywheel 33. As shown in FIG.
The internal teeth 41 are attached to the inner peripheral edge of the flywheel 33.
a is formed on the ring member 41 on which the outer teeth 3
The clutch disk 36 formed with 6a is configured to be meshed, and the pin-type mounting is configured such that a pin for inserting the clutch disk is fixed at one end to the flywheel. In any case, since the clutch disc 36 moves forward and backward with respect to the flywheel 33, in the case of the gear system, the inner teeth 41 of the ring member 41 are used.
In the case of the pin type, play was formed between the pin a of the clutch disc 36 and the pin hole of the clutch disc. Therefore, the clutch disk 3
When the clutch disc 6 is not pressed against the clutch rotating plate 34, the clutch disc 36 rotates together with the flywheel 33 when the inner teeth 41a of the ring member 41 and the outer teeth 36a of the clutch disc 36 or the pin holes of the clutch disc 36 are rotated. And the pin interfered, generating noise. Since the noise becomes larger as the backlash increases, the operator who operates the press machine feels troublesome, and there has been a demand for reducing or eliminating the noise.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and provides a clutch / brake device for a press machine which is configured so as to eliminate backlash and generate no noise when a clutch disk is mounted on a flywheel. The purpose is to do.

[0007]

SUMMARY OF THE INVENTION A clutch / brake device for a press machine according to the present invention is configured as follows to solve the above-mentioned problems. That is, a flywheel rotated by a drive source, a crankshaft rotatably supported by the machine frame and disposed to penetrate the flywheel, and a crankshaft supported by the flywheel and rotating with the rotation of the flywheel A possible clutch disc and a brake disc supported by the machine frame, and a cylinder member movable between the clutch disc and the brake disc is arranged between the clutch disc and the brake disc, A press configured to transmit the rotation of the flywheel to the crankshaft by the cylinder member pressing the clutch disc and pressing the clutch disc against a rotating plate fixed to the crankshaft. The clutch / brake device according to claim 1, wherein A guide pin which is inserted into the clutch disc and is fixed to the flywheel is arranged, and a flange portion which can be brought into contact with the clutch disc is formed on a head of the guide pin, and a gap between the clutch disc and the flywheel is formed. Further, an elastic member for urging the clutch disc toward the flange portion of the guide pin is provided.

Preferably, the clutch disk is divided into a plurality of pieces and supported by the flywheel, and side plates are arranged on both sides in the circumferential direction of the plurality of divided clutch disks. A clutch disk is disposed so as to be able to abut, and an inclined surface is formed on each abutting surface so that the clutch disk can be adjusted and moved in a radial direction of the flywheel. Good.

More preferably, the elastic member may be a spring member formed in a dish shape.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

A clutch / brake device (hereinafter referred to as a clutch / brake device) 1 in a press according to the present embodiment.
As shown in FIGS. 1 and 2, a flywheel 7 is rotatably supported via a bearing 6 at one end of a crankshaft 5 rotatably supported by the machine frame 3. 4 is attached to the mounting surface 7a on the right end surface of the flywheel 7 (see FIG. 1).
A clutch disk 9 divided into individual pieces and having a substantially tapered shape, and a side plate 11 (see FIG. 2) mounted along the circumferential direction between the clutch disks 9 are arranged.
The clutch rotating plate 12 keyed to the crankshaft 5 is provided in a concave portion 7b formed at the center of the right end face of
Are arranged with a friction surface 12a formed on the right end surface of the large diameter portion.

Each clutch disc 9 has a
As shown in FIG. 3, an outer edge 9a located on the side of the mounting surface 7a of the flywheel 7 and a lining attachment 9b located on the side of the recess 7b of the flywheel 7 are formed. A pressing surface 9c which can be pressed is formed on the contact surfaces 11a formed on both sides of the lining, and the lining 10 is formed on the front surface and the back surface of the lining mounting portion 9b.
Is affixed. The lining 10 attached to the back surface of the lining attachment portion 9b is the rotating plate 1 for the clutch.
It is arranged so as to be able to be pressed on the second friction surface 12a. The pressing surface 9c of the clutch disk 9 is moved from the center point of the four arranged clutch disks 9 to the outer edge 9a of the clutch disk 9.
Has a slope inclined toward the center point with respect to a center line formed toward the center of the lens. And the side plate 11
Is formed along the inclined surface of the pressing surface 9c of the clutch disk 9. Therefore, the clutch disc 9 can be adjusted to move along the radial direction of the flywheel 7 with respect to the side plate 11 fixed to the flywheel 7, and the further outward, the less the play with the side plate 11. Become.

As shown in FIG. 3, two through holes 9d are formed in the outer edge 9a of each clutch disc 9, and a guide pin 13 having a flange 13a at the head is inserted into the through hole 9d. The guide pin 13 is fixed to the mounting surface 7a of the flywheel 7. Further, a disc spring 14 is disposed between the clutch disc 9 and the flywheel 7 so as to urge the clutch disc 9 toward the flange 13a of the guide pin 13 between the clutch disc 9 and the flywheel 7.

On the other hand, the brake pins 16 are fixed to the machine frame 3 so as to extend horizontally outward at two places (to the right in FIG. 1) so as to be located above and below the flywheel 7. The upper end and the lower end of the brake disc 18 are slidably supported by the ends of the two brake pins 16. Lining 19 is adhered to both surfaces of the brake disk 18, and an operating cylinder 20 is slidably supported on the body 12 b of the clutch rotating plate 12 on the clutch disk side (inside) so as to sandwich the lining 19. The brake rotating plate 22 is supported by the crankshaft 5 on the side (outside) opposite to the clutch disk. The operating cylinder 20 is formed so as to be fitted to the brake rotating plate 22 at the center thereof and to be slidable with respect to the brake rotating plate 22, and the left end face in FIG.
The outer peripheral edge of the right end face is formed so as to be able to be pressed on the lining 19 of the brake disk 18. Further, a portion near the outer peripheral edge of the left end surface of the brake rotating plate 22 has a friction surface
A rotor seal 24 for allowing air to flow into the central portion is attached via an end plate 25 to the lining 19. The working cylinder 20
A plurality of return springs 26 for urging the working cylinder 20 so as to press it against the brake disk 18 are disposed therein.

In the clutch / brake device 1 formed as described above, the start button of an operation box (not shown) is operated, the flywheel 7 is rotated (idle operation) by a motor (not shown), and the operation button is operated to operate the air. , The clutch is engaged and the crankshaft 5 is rotated. The clutch disc 9 is provided on the side plate 11 with the respective pressing surfaces 9 c and 1.
The guide pin 13 and the through-hole 9d of the clutch disk 9 have at least a clearance corresponding to the amount of adjustment movement of the clutch disk 9 and are adjusted so as to have an extremely small clearance for moving the clutch disk 9 between the clutch disks 9a. have.

In the state of the idle operation, that is, when the working cylinder is 20
Is moved by the return spring 26 so as to press the brake disk 18 against the brake rotary plate 22, and the clutch disk 9 is biased by the disc spring 14 to rotate the clutch rotary plate 1.
2 and rotating together with the flywheel 7 (the crankshaft 5 is not rotated), the disc spring 14 simultaneously presses the clutch disc 9 against the flange 13a of the guide pin 13, so that the clutch disc 9 Are in a state in which movement in the circumferential direction and the axial direction is restricted by the frictional force with respect to the guide pin 13. Further, although the clutch disc 9 has a slight gap with the side plate 11 for movement by the working cylinder 20, the clearance surface 9c of the rotating side is pressed against the contact surface 11a of the side plate 11 by centrifugal force. In this state, the motor rotates together with the flywheel 7 without noise, so that the noise from the clutch disc disappears.

Next, the operating cylinder 20 moves toward the clutch disc 9 by overcoming the urging force of the return spring 26 due to the in-clutch state, that is, the inflow of air, whereby the lining 10 of the clutch disc 9 is disengaged by the clutch. When the brake disk 18 is pressed against the friction surface 12 a of the rotary plate 12 for use and the brake disk 18 is separated from the rotary plate 22 for brake, the clutch disk 9
And the clutch rotating plate 12 are held with pressure, so that the clutch disc 9 has no allowance for play. Therefore, there is no noise generated from the clutch disk 9.

Further, when the clutch disk 9 is moved by the working cylinder 20, the disc spring 14 is compressed and at the same time an urging force acts in a direction opposite to the movement of the clutch disk 9, so that the lining 10 of the clutch disk 9 and the clutch The abrupt force of the friction surface 12a of the rotary plate 12 for pressing can be slightly reduced. This can also reduce the noise generated when the clutch is "ON".

As described above, since the clutch disk is divided into a plurality of parts and the movement of the clutch disk is restricted by the disc spring and the state of contact with the side plate due to the centrifugal force of the clutch disk is maintained, no noise is generated during idling.

The number of divisions of the clutch disk is not limited to the above, but may be two or three, or may be five or more.
Further, the elastic member disposed between the flywheel and the clutch disk may not be a disc spring but may be a coil spring, or may be another elastic member. However, if a disc spring is used, the space can be made compact and the cost can be reduced. Further, the angle of inclination of the contact surface between the side plate and the clutch disc can be appropriately determined at the time of design.

Further, the guide pin 13 is not one-piece, and may be constituted by two members by inserting a bolt into a flanged bush.

[0022]

According to the present invention, the clutch and the press
The brake device includes a flywheel rotated by a drive source, a crankshaft rotatably supported by a machine frame and disposed to penetrate the flywheel, and a rotation of the flywheel supported by the flywheel. A clutch member rotatable together with a brake disk supported by the machine frame, and a cylinder member movable between the clutch disk and the brake disk is disposed between the clutch disk and the brake disk. The cylinder member presses the clutch disc and presses the clutch disc against a rotating plate fixed to the crankshaft, thereby transmitting the rotation of the flywheel to the crankshaft. The clutch disk is inserted through the A guide pin fixed to the wheel is arranged, and a flange that can contact the clutch disc is formed on the head of the guide pin, and the clutch disc is disposed between the clutch disc and the flywheel. An elastic member biasing toward the flange of the guide pin is provided. When the clutch is not engaged, the clutch disk rotates together with the flywheel while its movement is restricted by the elastic member, so that noise generated from the clutch disk can be eliminated.

The clutch disk is divided into a plurality of pieces and supported by the flywheel, and side plates are disposed on both sides in the circumferential direction of the plurality of divided clutch disks. Are arranged so that they can abut, and on each abutment surface,
If the inclined surface is formed so that the clutch disk can be adjusted and moved in the radial direction of the flywheel, when the clutch is not engaged, the clutch disk is pressed against the contact surface of the side plate by the centrifugal force of the clutch disk, so that the clearance is reduced. The clutch disc rotates with the flywheel in the absence state. Therefore, noise generated by the clutch disk can be eliminated.

Further, if the elastic member is a dish-shaped spring, it can be made compact and inexpensive.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a clutch / brake device according to one embodiment of the present invention.

FIG. 2 is a diagram showing a state where a clutch of FIG. 1 is attached to a flywheel.

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is a sectional view showing a conventional clutch / brake.

FIG. 5 is a partially enlarged view showing one embodiment of the clutch disk in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Clutch / brake device 3 ... Machine frame 5 ... Crankshaft 7 ... Flywheel 9 ... Clutch disk 9c ... Pressing surface 11 ... Side plate 11a ... Contact surface 12 ... Clutch rotating plate 13 ... Guide pin 13a ... Flange 14 ... Disc spring 18 ... Brake disc 20 ... Working cylinder 22 ... Rotating plate for brake

Claims (3)

[Claims] A flywheel rotated by a drive source, a crankshaft rotatably supported by a machine frame and disposed through the flywheel, and a flywheel supported by the flywheel. A clutch member rotatable with rotation and a brake disk supported by the machine frame, and a cylinder member movable between the clutch disk and the brake disk is provided between the clutch disk and the brake disk. The cylinder member is arranged to transmit the rotation of the flywheel to the crankshaft by pressing the clutch disk and pressing the clutch disk against a rotating plate fixed to the crankshaft. Clutch and brake device in a press machine A guide pin is inserted through the clutch disc and fixed to the flywheel, and a flange portion is formed at the head of the guide pin so as to be able to contact the clutch disc. The clutch disc and the flywheel An elastic member for urging the clutch disk toward the flange of the guide pin is provided between the clutch disk and the clutch / brake device in the press. 2. The clutch disc is divided into a plurality of pieces and supported by the flywheel, and side plates are arranged on both sides in the circumferential direction of the plurality of divided clutch discs. 2. The press as claimed in claim 1, wherein said clutch discs are arranged so as to be able to abut against each other, and each of said abutment faces is formed with an inclined surface so that said clutch disc can be adjusted and moved in a radial direction of said flywheel. Clutch and brake device in the machine. 3. The clutch and brake device according to claim 1, wherein said elastic member is a spring member formed in a dish shape.