JP3964032B2 - Clutch and brake device in press machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a press machine having a combination type clutch / brake, and more particularly to a clutch / brake apparatus for a press machine configured to eliminate noise.
[0002]
[Prior art]
In general, the clutch / brake device in a mechanical press machine is mainly classified into a combination type in which a clutch disc and a brake disc are set as a set, and a separate type in which the clutch device and the brake device are separately provided. The combination type clutch / brake device can mechanically take the timing of the press machine, can advantageously generate heat from the brakes, and can be manufactured at a low cost because the operating cylinder and the solenoid valve are shared. In addition, the separate clutch / brake device can improve the stopping performance because the weight of the rotating part is small and the inertia can be reduced.
[0003]
A clutch / brake device 31 shown in FIGS. 4 to 5 is an example of a conventional combination type. A flywheel 33 is rotatably disposed at one end of a crankshaft 32, and a crank is disposed at a side of the flywheel 33. A clutch rotating plate 34 supported by the shaft 32 is attached. A brake rotating plate 35 is supported on the crankshaft 32 at the end of the crankshaft 32. The clutch rotating plate 34 and the brake rotating plate 35 are each provided with a friction surface so as to face each other, and a clutch disk 36 having a lining adhered to the friction surface of the clutch rotating plate is disposed. A brake disc 37 having a lining adhered to the friction surface of the brake rotating plate 35 is disposed. The clutch disc 36 is supported by the flywheel 33 and rotated together with the flywheel 33, the brake disc 37 is supported by the machine frame 38, and the clutch disc 36 and the brake disc 37 are alternately pressed and moved to the respective rotary plates. A cylinder 39 is disposed between the clutch disc 36 and the brake disc 37 so as to be supported by the crankshaft 32.
[0004]
The operating cylinder 39 includes a plurality of cylinders arranged on the brake rotating plate 35 side when the clutch means 36 is pressed against the clutch rotating plate 34 by the inflow of 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 spring means 40 to stop the rotation of the crankshaft 32.
[0005]
[Problems to be solved by the invention]
However, in the conventional clutch / brake device 31, when the clutch disk 36 rotates together with the flywheel 33, the clutch disk 36 is attached to the flywheel 33 via gears or pins, and the clutch disk 36 is attached to the flywheel 33. On the other hand, it is configured to be able to advance and retract. As shown in FIG. 5, the gear system is attached to a ring member 41 that is attached to the flywheel 33 and has inner teeth 41a formed on the inner peripheral edge thereof, and a clutch disk 36 that has outer teeth 36a formed on the entire outer peripheral edge. The pin-type attachment is configured so that one end of the pin passing through the clutch disk is fixed to the flywheel. In either case, the clutch disk 36 moves forward and backward with respect to the flywheel 33. Therefore, in the case of the gear system, the inner teeth 41a of the ring member 41 and the outer teeth 36a of the clutch disk 36, or in the case of the pin system. Has a backlash between the pin hole of the clutch disk and the pin. Therefore, in a state where the clutch disk 36 is not pressed against the clutch rotating plate 34, when the clutch disk 36 rotates together with the flywheel 33, the inner teeth 41a of the ring member 41 and the outer teeth 36a of the clutch disk 36, or the clutch The disk pin hole and the pin interfered, generating noise. Since this noise increases as the backlash increases, the operator who operates the press feels bothersome, and there has been a demand for reducing or eliminating the noise.
[0006]
The present invention solves the above-described problems, and provides a clutch / brake device for a press machine that is configured so as to eliminate backlash and generate no noise when a clutch disk is attached to a flywheel. Objective.
[0007]
[Means for Solving the Problems]
The clutch / brake device for a press according to the present invention is configured as follows in order to solve the above problems. That is,
A flywheel that is rotated by a drive source, a crankshaft that is rotatably supported by a machine frame and disposed so as to pass through the flywheel, and that is supported by the flywheel and is rotatable with the rotation of the flywheel. A cylinder member that is movable between the clutch disk and the brake disk is disposed between the clutch disk and the brake disk; A clutch in a press machine configured to transmit rotation of the flywheel to the crankshaft by a member pressing the clutch disc and pressing the clutch disc to a rotating plate fixed to the crankshaft. A brake device,
A guide pin that is inserted through the clutch disc and fixed to the flywheel is disposed, and a head portion of the guide pin is formed with a flange portion that can contact the clutch disc,
Between the clutch disc and the flywheel, an elastic member that urges the clutch disc toward the flange of the guide pin is disposed ,
The clutch disk is divided into a plurality of parts and supported by the flywheel, and side plates are arranged on both sides in the circumferential direction of the divided clutch disks so that the side plates and the clutch disks can come into contact with each other. And an inclined surface is formed on each contact surface so that the clutch disk can be adjusted and moved in the radial direction of the flywheel .
[0009]
More preferably, the elastic member may be a spring member formed in a dish shape.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0011]
As shown in FIGS. 1 and 2, a clutch / brake device (hereinafter referred to as a clutch / brake device) 1 in a press machine according to this embodiment includes a bearing 6 at one end of a crankshaft 5 that is rotatably supported by a machine frame 3. The flywheel 7 is rotatably supported via the. On the attachment surface 7a of the right end surface (see FIG. 1) of the flywheel 7, there are divided into four roughly disc-shaped clutch discs 9 and side plates 11 attached between the respective clutch discs 9 along the circumferential direction. (See FIG. 2) is arranged, and a clutch rotating plate 12 key-coupled to the crankshaft 5 is formed on the right end surface of the large diameter portion in the recess 7b formed in the center of the right end surface in FIG. The friction surface 12a is disposed.
[0012]
As shown in FIG. 2, each clutch disc 9 is formed with an outer edge portion 9a located on the attachment surface 7a side of the flywheel 7 and a lining attachment portion 9b located on the concave portion 7b side of the flywheel 7, A pressing surface 9c that can be pressed against the contact surface 11a formed on both sides of the side plate 11 is formed on both sides of the outer edge portion 9a, and a lining 10 is adhered to the front surface and the back surface of the lining mounting portion 9b. Yes. And the lining 10 stuck on the back surface of the lining attachment part 9b is arrange | positioned so that pressing on the friction surface 12a of the rotating plate 12 for clutches is possible. The pressing surface 9c of the clutch disk 9 is inclined toward the center point side with respect to a center line formed from the center point of the four clutch disks 9 arranged toward the center part of the outer edge portion 9a of the clutch disk 9. It has an inclined surface. The contact surface 11 a of the side plate 11 is formed along the inclined surface of the pressing surface 9 c of the clutch disk 9. Accordingly, the clutch disk 9 can be moved and adjusted along the radial direction of the flywheel 7 with respect to the side plate 11 fixed to the flywheel 7, and the backlash with the side plate 11 becomes less as it moves outward. Become.
[0013]
Further, as shown in FIG. 3, two through holes 9d are formed in the outer edge portion 9a of each clutch disk 9, and a guide pin 13 having a flange portion 13a at the head is inserted into the through hole 9d and guided. The pin 13 is fixed to the mounting surface 7 a of the flywheel 7. Further, the disc spring 14 is inserted between the guide pin 13 and is arranged between the clutch disc 9 and the flywheel 7 so as to urge the clutch disc 9 toward the flange 13 a side of the guide pin 13.
[0014]
On the other hand, two brake pins 16 are fixed to the machine frame 3 so as to extend in the horizontal direction outward (to the right in FIG. 1) so as to be positioned above and below the flywheel 7. The upper end portion and the lower end portion of the brake disk 18 are slidably supported on the end portions of the individual brake pins 16. A lining 19 is attached to both surfaces of the brake disk 18, and the operation cylinder 20 is slidably supported on the body 12 b of the clutch rotating plate 12 on the clutch disk side (inner side) so as to sandwich the lining 19. A brake rotating plate 22 is supported on the crankshaft 5 on the side opposite to the clutch disk (outside). The operating cylinder 20 is fitted to the brake rotating plate 22 at the center thereof and is formed to be slidable with respect to the brake rotating plate 22, and the left end surface in FIG. 1 can be pressed against the lining 10 of the clutch disk 9. The vicinity of the outer peripheral edge of the right end surface is formed so that it can be pressed onto the lining 19 of the brake disc 18. Further, the vicinity of the outer peripheral edge portion of the left end surface of the brake rotating plate 22 has a friction surface 22a and is disposed so as to be able to be pressed against the lining 19 of the brake disc 18, and a rotor seal 24 for inflowing air into the central portion is an end. It is attached via the plate 25. A plurality of return springs 26 are arranged in the working cylinder 20 to urge the working cylinder 20 against the brake disc 18 side.
[0015]
The clutch / brake device 1 formed as described above operates a start button of an operation box (not shown), rotates the flywheel 7 (idle operation) with a motor (not shown), and operates the operation button to flow in air. And the clutch enters to rotate the crankshaft 5. The clutch disk 9 is assembled and adjusted with respect to the side plate 11 so as to have a very slight gap for moving the clutch disk 9 between the pressing surfaces 9c and 11a. 9d has at least a gap corresponding to the amount of adjustment movement of the clutch disk 9.
[0016]
In the idling state, that is, the operating cylinder 20 is moved by the return spring 26 so as to press the brake disc 18 against the brake rotating plate 22, and the clutch disc 9 is moved from the clutch rotating plate 12 by the biasing force of the disc spring 14. In a state where the disc spring 14 is separated and rotated with the flywheel 7 (the crankshaft 5 is not rotated), the disc spring 14 simultaneously presses the clutch disc 9 against the flange portion 13a of the guide pin 13, so that the clutch disc 9 is guided. The pin 13 is in a state where movement in the circumferential direction and the axial direction is restricted by the frictional force. Further, although the clutch disk 9 has a slight gap from the side plate 11 due to the movement by the operating cylinder 20, the pressing surface 9c on the rotating side is pressed against the contact surface 11a of the side plate 11 by centrifugal force, so that the clearance is eliminated. It will rotate with the flywheel 7 in the absence of noise, so that the noise from the clutch disk disappears.
[0017]
Next, when the clutch is engaged, that is, when the air flows in, the operating cylinder 20 overcomes the urging force of the return spring 26 and moves to the clutch disk 9 side, whereby the lining 10 of the clutch disk 9 is moved to the clutch rotating plate. The clutch disc 9 is clamped between the operating cylinder 20 and the clutch rotary plate 12 with pressure when the brake disc 18 is pressed against the friction surface 12a of the brake 12 and the brake disc 18 is separated from the brake rotary plate 22. Therefore, the clutch disk 9 has no room for play. Therefore, there can be no noise generated from the clutch disk 9.
[0018]
Moreover, when the disc disk 14 is moved by the operating 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 disc 9. Therefore, the lining 10 of the clutch disc 9 and the clutch rotating plate The rapid force with which the 12 friction surfaces 12a are pressed can be slightly reduced. This can also reduce noise generated when the clutch is “ON”.
[0019]
As described above, the clutch disk is divided into a plurality of parts, and the movement restriction by the disc spring and the contact state with the side plate by the centrifugal force of the clutch disk are maintained, so that no noise is generated during idling.
[0020]
The number of divisions of the clutch disk is not limited to the above, and may be 2 to 3, or 5 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 another elastic member. However, if a disc spring is used, the space can be made compact and the cost can be reduced. Furthermore, the inclination angle at the contact surface between the side plate and the clutch disk can be determined as appropriate during design.
[0021]
Further, the guide pin 13 is not integrated, and may be constituted by two bodies by inserting a bolt through a bush with a hook.
[0022]
【The invention's effect】
According to the present invention, a clutch / brake device for a press machine includes a flywheel that is rotated by a drive source, a crankshaft that is rotatably supported by a machine frame and disposed so as to penetrate the flywheel, A clutch disk supported by a flywheel and rotatable with the rotation of the flywheel; and a brake disk supported by the machine frame; between the clutch disk and the brake disk, the clutch disk and the brake A cylinder member movable between the disks is disposed, and the cylinder member presses the clutch disk and presses the clutch disk against a rotating plate fixed to the crankshaft, thereby rotating the flywheel. Is configured to transmit to the crankshaft,
A guide pin that is inserted through the clutch disk and is fixed to the flywheel is disposed, and a hook portion that can contact the clutch disk is formed on a head of the guide pin. An elastic member that urges the clutch disk toward the flange portion of the guide pin is disposed between the wheels. When the clutch is not engaged, the clutch disk rotates with the flywheel while being restricted by the elastic member, so that noise generated from the clutch disk can be eliminated.
[0023]
The clutch disk is divided into a plurality of parts and supported by the flywheel, and side plates are arranged on both sides in the circumferential direction of the divided clutch disks so that the side plates and the clutch disks are in contact with each other. If the inclined surface is formed so that the clutch disk can be adjusted and moved in the radial direction of the flywheel on each abutment surface, the clutch disk of the clutch disk is not engaged. Since it is pressed against the contact surface of the side plate by centrifugal force, the clutch disk rotates together with the flywheel without clearance. Therefore, the noise generated by the clutch disk can be eliminated.
[0024]
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 and brake device according to an embodiment of the present invention. FIG. 2 is a view showing a state where a clutch of FIG. 1 is attached to a flywheel. FIG. 3 is a partially enlarged view of FIG. FIG. 5 is a partially enlarged view showing an embodiment of a clutch disk in FIG. 4;
DESCRIPTION OF SYMBOLS 1 ... Clutch brake device 3 ... Machine frame 5 ... Crankshaft 7 ... Flywheel 9 ... Clutch disc 9c ... Pressing surface 11 ... Side plate 11a ... Contact surface 12 ... Clutch rotating plate 13 ... Guide pin 13a ... Ridge part 14 ... Belleville spring 18 ... brake disc 20 ... acting cylinder 22 ... brake rotating plate

Claims (2)

A flywheel that is rotated by a drive source, a crankshaft that is rotatably supported by a machine frame and disposed so as to pass through the flywheel, and that is supported by the flywheel and is rotatable with the rotation of the flywheel. A cylinder member that is movable between the clutch disk and the brake disk is disposed between the clutch disk and the brake disk; A clutch in a press machine configured to transmit rotation of the flywheel to the crankshaft by a member pressing the clutch disc and pressing the clutch disc to a rotating plate fixed to the crankshaft. A brake device,
A guide pin that is inserted through the clutch disc and fixed to the flywheel is disposed, and a head portion of the guide pin is formed with a flange portion that can contact the clutch disc,
Between the clutch disc and the flywheel, an elastic member that urges the clutch disc toward the flange of the guide pin is disposed ,
The clutch disk is divided into a plurality of parts and supported by the flywheel, and side plates are arranged on both sides in the circumferential direction of the divided clutch disks so that the side plates and the clutch disks can come into contact with each other. A clutch / brake device in a press machine , wherein the contact surface is formed with an inclined surface so that the clutch disk can be adjusted and moved in the radial direction of the flywheel . 2. The clutch / brake device in a press machine according to claim 1, wherein the elastic member is a spring member formed in a dish shape .

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