JPH11230219A - Clutch-brake device for pressing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent heating up and generating smoke without degrading braking performance by reducing sliding load of a brake disk relative to a brake pin. SOLUTION: A brake disk 15 has at its upper and lower ends guide portions through which brake pins passes. The upper guide portion 16A has a hole formed in the brake disk 15 and an upper bushing 17A mounted in the hole. An upper face at a distal end portion of an upper circular pin 14A has a flat portion 14a worked into a plane surface. The upper bushing 17a is formed with a flat portion 17a so as to oppose to the flat portion 14a of the upper brake pin 14A. Flat type needle rollers 18 are arranged in such a way that they are inserted between the flat portion 14a of the upper brake pin 14A and the flat portion 17a of the upper bushing 17A, and thereby the brake disk 15 slidingly moves on the brake pin 14A through the flat type needle rollers 18.

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 an improvement in a brake section.

[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 31 shown in FIG. 6 is an example of a conventional combination type. A flywheel 33 is rotatably disposed at one end of a crankshaft 32, and a flywheel 33 is provided at a side portion of the flywheel 33. A clutch rotating plate 34 fixed to the crankshaft 32 is attached. At the end of the crankshaft 32, a brake rotary plate 35 is supported by the crankshaft 32. A friction surface is formed on the clutch rotating plate 34 and the brake rotating plate 35 so as to oppose each other, and a clutch disk 36 having a lining stuck to the friction surface of the clutch rotating plate 35 so as to be able to be pressed is arranged. And
A brake disc 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 is rotated together with the flywheel 33. The brake disc 37 is slidably supported by the machine frame 38 via the brake pin 42, and the clutch disc 36 and the brake disc 37 are alternately arranged. An operating cylinder 39 for pressing and moving to each rotating plate is arranged 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 disc 37 is pressed against the brake rotating plate 35 by the plurality of springs 40 to stop the rotation of the crankshaft 32.

[0005] A guide portion 43 is provided on the brake disc 37 so that the brake pin 42 is inserted into the upper end and the lower end so that the brake disc 37 slides in the axial direction with respect to the brake pin 42. . A cylindrical brake pin 42 is inserted into the guide part 43 at the upper end, and a brake pin 42 having a rectangular tip is inserted into the guide part 43 at the lower end. The brake disk 37 was slid along.

[0006]

However, in the conventional clutch / brake device 31, the brake disc 37
The heavier the weight, the larger the size, the worse the sliding movement of the brake disk. Also, the brake pin 42
When the brake disc 37 is mounted, the brake pin 42 is tilted depending on the mounting state of the brake disc 37 and the machine frame 38, so that the brake disc 37 may be mounted with a tilt. If the brake disc 37 is attached at an angle, not only the braking performance will be reduced, but also heat and smoke will be generated, or the current value will be greatly consumed and the press machine will be stopped suddenly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an object to provide a clutch / brake device for a press machine, which can reduce the movement of a brake disk so as not to reduce braking performance and eliminate heat and smoke. The purpose is to provide.

[0008]

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 a machine frame and disposed to penetrate the flywheel, and a crankshaft supported by the flywheel and rotating with the rotation of the flywheel A clutch / brake device in a press machine, comprising: a possible clutch disc; and a brake disc supported on the machine frame via a brake pin,
The brake disc has a guide portion for inserting the brake pin at an upper end portion and a lower end portion, and is arranged so as to be slidable with respect to the brake pin, and a low friction member is provided at at least one guide portion. And the brake disk is arranged to slide on the brake pin via the low friction member.

Preferably, the guide portion has a bearing portion through which the brake pin is inserted, and a flat portion is formed on each of the opposing surfaces of the brake pin and the bearing portion, and between the respective flat portions. What is necessary is just to be the thing provided with the low friction member.

It is more preferable that the low friction member is a flat type needle roller bearing.

[0011]

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 FIG. 1, a flywheel 7 is rotatably supported via a bearing 6 at one end of a crankshaft 5 rotatably supported by the machine frame 3. A mounting surface 7a and a concave portion 7b are formed on the right end surface of the flywheel 7,
A clutch ring 8 having inner teeth formed on the inner peripheral surface is attached to the mounting surface 7a over substantially the entire circumference, and the clutch disc 9 is fitted inside the clutch ring 8 so that the outer teeth mesh with the inner teeth of the clutch ring 8. They are slidably arranged in the width direction of the teeth. The entire circumference of the clutch ring 8 is divided into two parts, large and small, and assembled so that the clearance between the clutch ring 9 and the external teeth of the clutch disk 9 can be adjusted. A lining 10 is adhered to the front and back surfaces of the clutch disk 9, and is pressed against the friction surface 12 a of the clutch rotating plate 12 fixed to the crankshaft 5. The clutch rotating plate 12 has the above-described friction surface 12a formed at the right end of the large-diameter portion accommodated in the recess 7b of the flywheel and a body 12b which is coupled to the crankshaft 5 by a key.
have.

On the other hand, two brake pins 14 extend horizontally (rightward in FIG. 1) on the machine frame 3 so as to be located above and below the flywheel 7. The upper end and the lower end of the brake disk 15 are slidably supported at the ends of the two brake pins 14 with the guide portions 16. As shown in FIG. 2, the brake disk 15 is formed with a disk-shaped ring having upper and lower protrusions, and has a central opening. An upper guide 16A is provided on the upper protrusion, and the upper guide 16
A is formed by mounting the upper bush 17A in a hole 15a formed in the brake disc 15, and the upper brake pin 1 formed in a circular shape in the upper bush 17A.
4A is inserted. As shown in FIGS. 3 and 4, a flat portion 14a is formed on the upper surface of the tip of the upper brake pin 14A, and a flat portion 17a is formed on the upper bush 17A so as to face the flat portion 14a. Then, between the flat portion 14a of the upper brake pin 14A and the flat portion 17a of the upper bush 17A, a flat needle roller (flat needle roller bearing) as one mode of the low friction member shown in FIG.
18 is inserted. The upper bush 17A is fixed to the brake disk 15 by screwing from the flange formed at the right end in FIG. 3 toward the brake disk 15, and when the brake disk 15 is mounted, a load is applied downward by its weight. Receive. However, since the friction is extremely small with respect to the movement of the brake disk 15 in the axial direction, a light movement is performed.

A lower guide 16B is provided on the lower projection.
Is provided, and the lower guide portion 16B is
5 is formed by mounting the lower bush 17B in the hole 15a formed therein, and the lower brake pin 14B having a rectangular tip is inserted into the lower bush 17B. The inner surface of the lower bush 17B is the lower brake pin 14.
3 and a flange 17b is formed at the right end in FIG. 3, and is screwed to the brake disk 15 from the flange 17b. It is fixed.

The lower guide portion 16B also has a flat needle roller 18 similar to the upper guide portion 16A.
May be formed to form the lower brake pin 14B and the lower bush 17B.

As shown in FIG. 2, a lining 19 is provided on both sides of the ring portion of the brake disc 15 over the entire circumference.
The working cylinder 20 is attached to the clutch disc side (inside) so that the
Are slidably supported by the body 12b of the clutch rotary plate 12, and the brake rotary plate 22 is supported by the crankshaft 5 on the side (outside) away from the clutch disk. The working 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 15. Furthermore, the rotating plate 22 for the brake
In the vicinity of the outer peripheral edge of the left end face, a friction surface 22a is provided so as to be able to be pressed against the lining 19 of the brake disc 15, and a rotor seal 24 for allowing air to flow into the central portion.
Is attached via an end plate 25. Also,
A plurality of return springs 26 for urging the working cylinder 20 to press the working cylinder 20 against the brake disk 15 are arranged in the working cylinder 20.

The clutch / brake device 1 formed as described above operates a start button of an operation box (not shown) to rotate the flywheel 7 (idle operation) by a motor (not shown), and activates the operation button to operate the air. , The clutch is engaged and the crankshaft 5 is rotated.

When the power is turned on (actuation of the start button), no air is supplied into the clutch / brake device 1, and the operating cylinder 20 returns the brake disc 15 by the spring 26 to the brake rotating plate 22. It has been pressed. The clutch disk 9 is separated from the clutch rotating plate 12 and rotates together with the flywheel 7 (the crankshaft 5 is not rotated).

Next, when air is supplied, the working cylinder 2
0 moves toward the clutch disc 9 by overcoming the biasing force of the return spring 26, and thereby the lining 10 of the clutch disc 9 is moved to the friction surface 12a of the clutch rotating plate 12.
At the same time, the upper and lower guide portions 16 of the brake disk 15 slide along the brake pins 14, and the lining 19 of the brake disk 15
The rotation of the flywheel 7 is transmitted to the crankshaft 5 by moving away from the friction surface 22a, and the crankshaft 5 rotates. At this time, the brake disc 15
The upper bush 17A mounted on the upper guide 16A is connected to the flat type needle roller 18 on the upper brake pin 14.
Since it rolls on the upper side, the load due to friction is small and the movement is extremely light.

The movement of the brake disk 15 is performed even when the rotating crankshaft is stopped, and as described above, the movement is extremely light.

As described above, since the low-friction member is mounted on the guide portion 16 of the brake disk 15, no load is applied to the movement thereof, so that various problems during the operation of the brake do not occur.

The low friction member is not limited to the flat needle roller described above, but may be another member. For example, a linear motion type cylindrical bearing may be used. In this case, the tip of the upper brake pin may be left circular, and a bearing having an inner diameter substantially the same as the outer diameter of the upper brake pin may be fixed to the hole of the brake disc instead of the bush 17A. Further, instead of the flat needle roller, a member formed in a mirror surface may be used.

The low friction member may be mounted on the lower guide of the brake disc, or may be mounted on both the upper and lower guides.

[0024]

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 the machine frame and disposed to penetrate the flywheel, and a rotation of the flywheel supported by the flywheel. A clutch disc rotatable with the machine frame, and a brake disc supported on the machine frame via a brake pin, wherein the brake disc includes:
An upper end portion and a lower end portion have a guide portion through which the brake pin is inserted, and are disposed so as to be slidable with respect to the brake pin, and a low friction member is disposed in at least one of the guide portions, A brake disc is configured to slide on the brake pin via the low friction member. In the sliding operation of the brake disk due to the on / off of the clutch, the frictional force generated between the guide portion of the brake disk and the brake pin is extremely small due to the low friction member. Therefore, it does not lower the braking performance and does not generate heat or smoke. Further, since the current value is not sharply increased, the press machine is not suddenly stopped.

Further, the elastic member is a flat type needle roller, and can be manufactured compactly and at low cost.

[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 front view showing the brake disc in FIG. 1;

FIG. 3 is an enlarged sectional view showing details of an upper guide section in FIG. 2;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a perspective view of a flat needle roller in FIG. 2;

FIG. 6 is a sectional view of a conventional clutch / brake device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Clutch and brake device 3 ... Machine frame 5 ... Crankshaft 7 ... Flywheel 9 ... Clutch disk 12 ... Clutch rotating plate 14 ... Brake pin 14A ... Upper brake pin 14B ... Lower brake pin 14a ... Flat part 15 ... Brake disk DESCRIPTION OF SYMBOLS 16 ... Guide part 16A ... Upper guide part 16B ... Lower guide part 17 ... Bush 17A ... Upper bush 17B ... Lower bush 17a ... Flat part 18 ... Flat needle roller (low friction member) 20 ... Working cylinder 22 ... Brake rotary plate

Claims (3)

[Claims] A flywheel rotated by a drive source, a crankshaft rotatably supported by a machine frame and disposed to penetrate the flywheel, and a flywheel supported by the flywheel. A clutch / brake device for a press machine comprising: a clutch disc rotatable with rotation; and a brake disc supported on the machine frame via a brake pin, wherein the brake disc has an upper end portion. And a lower end portion having a guide portion for inserting the brake pin, slidably disposed with respect to the brake pin, a low-friction member provided at at least one guide portion, and the brake disk Is configured to slide on the brake pin via the low friction member. Chi brake system. 2. The guide section has a bearing section through which the brake pin is inserted, and a flat section is formed on each of the opposing faces of the brake pin and the bearing section, and low friction is provided between the respective flat sections. The clutch / brake device for a press according to claim 1, wherein a member is provided. 3. The clutch / brake device according to claim 1, wherein the low friction member is a flat needle roller bearing.