JP3807641B2 - Wet clutch brake device for mechanical press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wet clutch brake device for a mechanical press with improved cooling efficiency.
[0002]
[Prior art]
Conventionally, as this type of clutch brake device, for example, the one described in JP-A-7-51898 is known.
[0003]
The clutch brake device disclosed in the former publication has a fly hole rotatably supported on an outer peripheral portion of a support member that supports a rotating shaft, and a hub that is fixed to the end of the rotating shaft and a clutch housing attached to the fly hole. A clutch disk and plate are provided between the brake housing and the hub fixed to the end of the support member, and a brake disk and plate are provided between the hub and the clutch disk and plate. It is connected via a clutch push plate by an actuated piston and a compression spring is connected between the brake disc and plate by the biasing force, and the distance from the fluid pressure supply port to the cylinder is shortened. As the responsiveness improves, the distance in the axial direction can be shortened, so the overall size can be reduced. There is a result.
[0004]
However, in the above conventional wet clutch brake device, as the case rotates together with the flywheel, the lubricating oil contained in the case sticks to the inner surface of the case by centrifugal force, and between the clutch and brake discs and plates. Since it does not circulate sufficiently, the heat generated by the clutch and brake cannot be cooled sufficiently, resulting in poor cooling efficiency.
[0005]
In order to remedy this problem, the amount of lubricating oil contained in the case should be increased. However, increasing the amount of oil increases the amount of oil that flows when the clutch or brake rotates. The loss increases, the power loss increases, and the oil in the case is agitated to raise the oil temperature, thereby reducing the cooling effect.
[0006]
The present invention has been made in order to improve such a conventional problem. A wet clutch brake device for a mechanical press that improves cooling efficiency by circulating lubricating oil using the rotational motion of a clutch and a brake. It is intended to provide.
[0007]
[Means for solving the problems and effects]
In order to achieve the above object, the invention according to claim 1 is a flywheel connected to the main motor side;
A clutch connected by air supplied into the cylinder between the rotating shafts connected to the main gear side and shut off by a return spring;
A brake released by air and braked by a return spring,
In a wet clutch brake device of a mechanical press that is housed in a rotor that rotates integrally with the flywheel, and lubricating oil is housed in the rotor ,
The brake housing of the brake faces the inner surface of the rotor and is fixed so as not to rotate.
A plurality of oil recovery passages formed radially on the outer periphery of the brake housing and through which the lubricating oil on the inner surface of the rotor flows in the axial direction ;
A standing surface formed by cutting the outer peripheral surface of the brake housing in a tangential direction at the outer peripheral surface side opening of the oil recovery path and formed on the front side with respect to the rotation direction of the rotor.
It is the wet clutch brake apparatus of the mechanical press characterized by having.
[0008]
With the above configuration, as the rotor rotates, a part of the lubricating oil contained in the rotor collides with the rising surface and circulates from the oil recovery path toward the center of the brake, so the brake disk, plate, lining, etc. It can be cooled efficiently.
As a result, the brake can be cooled sufficiently without increasing the amount of lubricating oil contained in the rotor, so power loss due to oil stagnation and agitation can be reduced and oil temperature rise is also prevented. Therefore, the brake lining and the life of the lubricating oil can be greatly improved.
[0009]
In addition, since the lubricating oil is circulated by utilizing the rotation of the rotor that rotates integrally with the flywheel, power and means for circulating the lubricating oil are not required, which simplifies the structure of the device, and improves the cooling efficiency. A good wet clutch brake device can be provided at low cost.
[0010]
In order to achieve the above object, the invention according to claim 2 is a flywheel connected to the main motor side,
A clutch connected by air supplied into the cylinder between the rotating shafts connected to the main gear side and shut off by a return spring;
A brake released by air and braked by a return spring,
In a wet clutch brake device of a mechanical press that is housed in a rotor that rotates integrally with the flywheel, and lubricating oil is housed in the rotor ,
The clutch housing of the clutch faces the inner surface of the rotor and rotates integrally with the roller.
The brake housing of the brake faces the inner surface of the rotor and is fixed so as not to rotate.
A plurality of first oil recovery holes which are opened in an outer peripheral portion of the clutch housing of the clutch and introduce lubricating oil on the inner surface of the rotor into the clutch housing ;
A plurality of second oil recovery holes which are opened in the outer peripheral portion of the brake housing of the brake and introduce lubricating oil on the inner surface of the rotor into the brake housing ;
Provided in each of the outer peripheral opening of the first oil recovery hole and the second oil recovery holes, and comprises an inclined surface formed on an opening edge portion comprising the rear side with respect to the rotational direction of the rotor did
This is a wet clutch brake device for a mechanical press.
[0011]
With the above configuration, as the rotor rotates, the lubricating oil stored in the rotor flows into the second oil recovery hole along the inclined surface, and the clutch is brought into contact with the start of the pressing operation, and the lubrication in the rotor is performed. Since the lubricating oil flows into the first oil recovery hole from the inclined surface due to the speed difference between the oil and the clutch housing , the lubricating oil in the rotor can be efficiently circulated toward the center of the clutch and brake .
As a result, clutches, brake disks, plates, linings, etc. can be cooled efficiently, so that the clutches and brakes can be sufficiently cooled without increasing the amount of lubricating oil contained in the rotor. Further, power loss due to oil stagnation and stirring can be reduced, and an increase in oil temperature can be prevented, so that the lining of the clutch and brake and the life of the lubricating oil can be greatly improved.
[0012]
In addition, since the lubricating oil is circulated by utilizing the rotation of the rotor that rotates integrally with the flywheel, power and means for circulating the lubricating oil are not required, which simplifies the structure of the device, and improves the cooling efficiency. A good wet clutch brake device can be provided at low cost.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings.
1 is a cross-sectional view of a clutch brake provided in a mechanical press, and FIG. 2 is a cross-sectional view taken along line AA of FIG.
In these drawings, 1 is a press body, 2 is a support member fixed to the side surface of the press body 1, and a rotating shaft 4 is rotatably supported through a bearing 3 at the center.
[0017]
One end side of the rotating shaft 4 protrudes into the press main body 1, and a pinion 4 a that meshes with a main gear (not shown) is provided at the end, and the other end side of the rotating shaft 4 is the tip of the support member 2. The cylindrical hub 6 is spline-engaged at the protruding end portion.
Reference numeral 7 denotes a flywheel rotatably supported on the outer peripheral portion of the support member 2 via a bearing 5, which is connected to a main motor (both not shown) via an endless belt and is rotated by the main motor. It is like that.
A clutch 8 and a brake 9 are provided between the flywheel 7 and the hub 6.
[0018]
One end of a cylindrically formed rotor 10 is fixed to one side surface of the flywheel 7 by a fixing tool 11, and the clutch 8 and the brake 9 are accommodated in the rotor 10.
An end plate 12 is attached to the opening on the other end side of the rotor 10 so as to be freely opened and closed by a fixing tool 11 ′. The rotor 10 is hermetically sealed by the end plate 12. In addition, about half of the lubricating oil that cools and lubricates the brake 9 is contained.
[0019]
A cylinder 12a is formed inside the end plate 12, and a plate-like piston 12b is accommodated in the cylinder 12a.
The piston 12b is locked by a knock pin 13 implanted in the end plate 12, and rotates integrally with the end plate 12. A pressing plate 8d is provided on the clutch 12 side of the piston 12b. Yes.
[0020]
The pressing plate 8d has a plate shape, and is supported by a shaft portion 12c protruding from the center of the piston 12b via a thrust bearing 15. The piston 12b operates with air supplied into the cylinder 12a. Thus, the clutch 8 is pressed in the direction of the disk 8a via the thrust bearing 15.
The clutch 8 has a plurality of disks 8a and a plurality of plates 8b provided between the disks 8a, and linings 8c are provided on both surfaces of the plate 8b to increase the frictional force.
The inner peripheral portion of the disk 8a is spline-engaged with the outer peripheral surface of the hub 6 and rotates integrally with the hub 6 and the rotating shaft 4, and the outer peripheral portion of the plate 8b is projected from the inner surface of the rotor 10. The inner surface of the clutch housing 8e fixed to the partition wall 10a is spline-engaged to rotate integrally with the rotor 10.
[0021]
A plurality of oil recovery holes 8f are opened at equal intervals in the circumferential direction on the outer periphery of the clutch housing 8e.
These oil recovery holes 8f are used to cool the disk 8a and the plate 8b of the clutch 8 by taking the lubricating oil stuck to the inner surface of the rotor 10 during rotation into the clutch housing 8e. In the opening on the outer peripheral side of the clutch housing 8e, an inclined surface 8g is formed by chamfering a corner at an opening edge on the rear side with respect to the rotation direction of the rotor 10, and the inclined surface 8g will be described later. As a result, the lubricating oil stuck to the inner surface of the rotor 10 can be introduced into the oil recovery hole 8f.
[0022]
On the other hand, the brake 9 also has a plurality of discs 9a and a plurality of plates 9b provided between the discs 9a, and linings 9c are provided on both surfaces of the plates 9b to increase the frictional force. .
The inner peripheral portion of the disk 9a is spline-engaged with the outer peripheral surface of the hub 6 and rotates integrally with the hub 6 and the rotating shaft 4, and the outer peripheral portion of the plate 9b is at the tip of the support member 2. It is engaged with the inner peripheral surface of the fixed brake housing 9e so as not to rotate.
[0023]
A plurality of oil recovery holes 9g are opened at equal intervals in the circumferential direction on the outer periphery of the brake housing 9e.
These oil recovery holes 9g are used to cool the disk 9a and the plate 9b of the brake 9 by taking the lubricating oil stuck to the inner surface of the rotor 10 during rotation into the brake housing 9e. In the opening on the outer peripheral side of the brake housing 9e, an inclined surface 9h is formed by chamfering a corner at an opening edge on the rear side with respect to the rotation direction of the rotor 10, and the inclined surface 9h will be described later. As a result, the lubricating oil stuck to the inner surface of the rotor 10 can be introduced into the oil recovery hole 9g.
[0024]
In the disc portion of the brake housing 9e, a plurality of oil recovery passages 9i are formed at equal intervals in the circumferential direction in the radial direction.
These oil recovery passages 9i are used to lubricate the bearings 5 and cool the brakes 9 by causing the lubricating oil stuck to the inner surface of the rotor 10 to rotate in the axial direction and rotate the brakes. A standing surface 9j is formed in the opening on the outer peripheral surface side of the housing 9e as shown in FIG.
The standing surface 9j is located on the front side with respect to the rotational direction of the rotor 10, and is formed by cutting the outer peripheral surface of the brake housing 9e in the tangential direction. The lubricating oil stuck to the inner surface 10 is introduced into the oil recovery path 9i.
[0025]
A dish-like pressing plate 9d is provided between the brake housing 9e and the assembly of the disk 9a and the plate 9b. The pressing plate 9d and the brake housing 9e are oiled in a direction parallel to the axis. A plurality of introduction holes 9k, 9m are opened.
These oil introduction holes 9k and 9m are for introducing the oil in the rotor 10 between the disk 9a and the plate 9b of the brake 9 and cooling them.
[0026]
The pressing plate 9d is connected to the pressing plate 8d on the clutch 8 side by a connecting rod 16 provided so as to penetrate the inside of the hub 6 in the axial direction, and operates integrally with the pressing plate 8d on the clutch 8 side. The disk 9a and the plate 9b are clamped between the receiving plate 9f and the pressing plate 9d fixed to the outer peripheral surface of the hub 6 so that the rotation of the rotating shaft 4 can be braked. A return spring 17 that urges the pressing plate 8d on the clutch 8 side in the direction of the piston 12b is accommodated in the hub 6.
[0027]
On the other hand, a rotary joint 21 is provided at the center of the end plate 12 in which the cylinder 12a is formed.
An air source 24 is connected to the rotary joint 21 via an electromagnetic valve 22 and an air tank 23 so that air can be supplied from the air source 24 into the cylinder 12 a via the air tank 23 when the electromagnetic valve 22 is opened and closed. It has become.
A pressure detection means 25 such as a pressure sensor is attached to the rotary joint 21 to detect the pressure in the cylinder 12a, and the pressure signal detected by the pressure detection means 25 is an operation signal of the electromagnetic valve 22. At the same time, it is input to the control means 26 comprising a microcomputer. The control means 26 is provided with a storage means 27 for storing the time from the operation signal of the electromagnetic valve 22 until the pressure in the cylinder 12a reaches the specified pressure.
[0028]
Reference numeral 28 denotes a wear warning means for warning by sound or light when the linings 8c and 9c of the clutch 8 and the brake 9 reach the allowable wear limit.
Next, the operation of the wet clutch brake device configured as described above will be described.
During the press operation, the flywheel 7 is always rotated by a main motor (not shown). At this time, the electromagnetic valve 22 is off and no air is supplied into the cylinder 12a. The pressing plate 8d on the clutch 8 side is in the position shown in FIG. 1 and the clutch 8 is in the “disconnected” state, and the discs 9a and 9b on the brake 9 side are between the pressing plate 9d of the brake 9 and the receiving plate 9f. , The rotating shaft 4 is in a braking state by the brake 9.
[0029]
As the flywheel 7 rotates, the plate 8b of the clutch 8 rotates together with the clutch housing 8e. At this time, the lubricating oil accommodated in the rotor 10 is stuck to the inner peripheral surface of the rotor 10 by centrifugal force. It is in.
[0030]
Next, when the solenoid valve 22 is turned on from this state to perform a pressing operation, the air in the air tank 23 is supplied into the cylinder 12a through the rotary joint 21, so that the pressure plate 8d on the clutch 8 side is driven by the piston 12b. And the pressure plate 9d on the brake 9 side is moved to the left, the disk 8a and the plate 8b on the clutch 8 side are crimped, and the rotation of the flywheel 7 is transmitted to the rotary shaft 4 via the clutch 8, Since the brake 9 is released, the pinion 4a provided on the rotary shaft 4 rotates a main gear (not shown) and starts the press work.
[0031]
As the press work starts, the energy accumulated in the flywheel 7 is consumed and the flywheel decelerates. As a result, the rotor 10 and the clutch housing 8e also decelerate, but are stuck in the rotor 10 by centrifugal force. Since the lubricating oil is not immediately decelerated due to inertia, a speed difference is generated between the lubricating oil and the clutch housing 8e, and the lubricating oil flows along the inclined surface 8g formed in the oil recovery hole 8f of the clutch housing 8e. It flows into the recovery hole 8f.
The lubricating oil reaches the disk 8a and the plate 8b of the clutch 8, and the disk 8a, the plate 8b, and the lining 8c are cooled.
[0032]
On the other hand, since the brake housing 9e is fixed to the support member 2 and does not rotate, there is always a speed difference with the lubricating oil that sticks to the inner surface of the rotor 10 and rotates. 9e flows into the oil recovery hole 9g along the inclined surface 9h formed in the oil recovery hole 9g, and collides with the standing surface 9j formed in the outer peripheral surface of the brake housing 9e and flows into the oil recovery path 9i. At the same time, the bearing 5 and the like are lubricated and the brake housing 9e itself is cooled.
[0033]
Further, the lubricating oil in the rotor 10 reaches the disk 9a and the plate 9b of the brake 9 through the introduction holes 9k and 9m opened in the brake housing 9e and the pressing plate 9d, and cools the disk 9a, the plate 9b, and the lining 9c. The brake can be cooled efficiently.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a wet clutch brake device of a mechanical press according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Press body 2 ... Supporting member 3 ... Bearing 4 ... Rotating shaft 4a ... Pinion 5 ... Bearing 6 ... Hub 7 ... Flywheel 8 ... Clutch 8a ... Disc 8b ... Plate 8c ... Lining 8d ... Pressing plate 8e ... Clutch housing 8f ... Oil recovery hole 8g ... inclined surface 9 ... brake 9a ... disk 9b ... plate 9c ... lining 9d ... pressure plate 9e ... brake housing 9f ... receiving plate 9g ... oil recovery hole 9h ... inclined surface 9i ... oil recovery path 9j ... standing surface 9k , 9m ... introduction hole 10 ... rotor 10a ... partition wall 11 ... fixing plate 12 ... end plate 12a ... cylinder 12b ... piston 12c ... shaft 13 ... knock pin 15 ... thrust bearing 16 ... connecting rod 17 ... return spring 21 ... rotary joint 22 ... Solenoid valve 23 ... Air tank 24 ... Air source 25 ... Pressure detection means 26 ... Control means 27 ... Storage means 28 ... Wear warning means

Claims (2)

A flywheel 7 connected to the main motor side;
A clutch 8 connected by air supplied into the cylinder 12a between the rotary shafts 4 connected to the main gear side and shut off by a return spring 17;
A brake 9 released by air and braked by a return spring 17;
In a wet clutch brake device of a mechanical press that is housed in a rotor 10 that rotates integrally with the flywheel 7, and lubricating oil is housed in the rotor 10 ,
The brake housing 9e of the brake 9 faces the inner surface of the rotor 10 and is fixed so as not to rotate.
A plurality of oil recovery passages 9i formed in a radial direction on the outer periphery of the brake housing 9e and through which the lubricating oil on the inner surface of the rotor 10 flows in the axial direction ;
A standing surface 9j formed by cutting the outer peripheral surface of the brake housing 9e in a tangential direction at the opening on the outer peripheral surface side of the oil recovery passage 9i and formed on the front side with respect to the rotation direction of the rotor 10. A wet clutch brake device for a mechanical press. A flywheel 7 connected to the main motor side;
A clutch 8 connected by air supplied into the cylinder 12a between the rotary shafts 4 connected to the main gear side and shut off by a return spring 17;
A brake 9 released by air and braked by a return spring 17;
In a wet clutch brake device of a mechanical press that is housed in a rotor 10 that rotates integrally with the flywheel 7, and lubricating oil is housed in the rotor 10 ,
The clutch housing 8e of the clutch 8 faces the inner surface of the rotor 10 and rotates integrally with the roller 10,
The brake housing 9e of the brake 9 faces the inner surface of the rotor 10 and is fixed so as not to rotate.
A plurality of first oil recovery holes 8f that are opened in the outer periphery of the clutch housing 8e of the clutch 8 and that introduce the lubricating oil on the inner surface of the rotor 10 into the clutch housing 8e ;
A plurality of second oil recovery holes 9g that are opened in the outer peripheral portion of the brake housing 9e of the brake 9 and that introduce lubricating oil on the inner surface of the rotor 10 into the brake housing 9e ;
Inclined surfaces provided at the outer peripheral opening portions of the first oil recovery hole 8f and the second oil recovery hole 9g and formed at the opening edge portion on the rear side with respect to the rotation direction of the rotor 10. A wet clutch brake device for a mechanical press characterized by comprising 8g and 9h.

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