JP2502289Y2 - Press drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) This invention relates to a press drive device for rotationally driving a crankshaft in a press machine.

(Prior Art) Conventionally, a press drive device is composed of a flywheel, a clutch / brake device, a gear connecting portion, and a crankshaft, and the gear connecting portion increases the reduction ratio,
It is common to form a two-stage or three-stage gear train that forms a parallel axis.

(Problems to be Solved by the Invention) By the way, the above-mentioned conventional drive device for a press machine is
Since two or three stages of gear trains are formed in order to increase the reduction ratio, the distance from the crankshaft to the bottom face of the casing of the gear train becomes large, which requires a large space in the vertical direction for the press drive device. That is, there is a problem in that the work space in the vertical direction becomes small and the workability of maintenance of the mold and the like deteriorates.

(Means for Solving the Problem) In order to solve the above-mentioned conventional problems, in the present invention, in a press shaft drive device for rotationally driving a crank shaft of a press machine, a casing can be attached to and detached from a frame of the press machine. , A cylindrical input shaft integrally provided with a flywheel is rotatably provided in the casing, and a first output shaft coaxial with the input shaft is rotatably provided in the input shaft. 1 release the output shaft from the fixed state and connect the 1st output shaft to the input shaft synchronously, or release the connection state from the 1st output shaft to the input shaft and synchronously fix the 1st output shaft to the casing A clutch / brake device for tightening is provided in the casing, a second output shaft coaxial with the first output shaft is rotatably provided in the frame, and one end of the second output shaft is provided with the clutch. In order to interlockly connect the first output shaft and the other end of the second output shaft, the drive gear is provided coaxially with the first output shaft at one end of the first output shaft. A driven gear capable of meshing with the drive gear is provided at the other end of the second output shaft in an eccentric manner with respect to the axis of the second output shaft.

(Operation) In the above configuration, the clutch / brake device is actuated to release the fixed state of the first output shaft from the casing and synchronously connect the first output shaft to the input shaft.
Then, by rotating the flywheel to rotate the input shaft, the first output shaft is rotated integrally with the input shaft, and by the action of the driving gear and the driven gear, the second gear is rotated.
The output shaft is rotated in association with the rotation of the first output shaft. As a result, the crankshaft can be driven to rotate and the slide in the press machine can be moved up and down.

When the slide cannot be moved up and down, the clutch / brake device is actuated to release the connection between the first output shaft and the input shaft, and synchronously fix the first output shaft to the casing. As a result, even if the flywheel is rotated, the first output shaft and the second output shaft do not rotate.

A drive gear is provided coaxially with the first output shaft at one end of the first output shaft, and a driven gear meshable with the drive gear is provided at the other end of the second output shaft. Since the first output shaft and the second output shaft are coaxial with each other, the one end portion of the first output shaft and the other end portion of the second output shaft can be interlocked and coupled even if the first output shaft and the second output shaft are coaxial. . In other words, the first
Even if the one end of the output shaft and the other end of the second output shaft are interlocked and coupled, the first output shaft and the second output shaft can be coaxial. Here, since the first output shaft and the input shaft are coaxial, the input shaft, the first output shaft, and the second output shaft are all coaxial.

Further, when maintenance of the clutch / brake device, the input shaft, and the first output shaft is performed, the one end portion of the first output shaft and the other end portion of the second output shaft are released by releasing the meshed state of the drive gear and the driven gear. The casing is detached from the frame while releasing the connected state. As a result, the casing including the clutch / brake device, the input shaft, and the first output shaft can be easily positioned at a low position away from the frame, and maintenance of the clutch / brake device, the input shaft, and the first output shaft can be performed. To do.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 4, a slide 5 that moves up and down is provided on the upper portion of the frame 3 of the press machine 1. The slide 5 has a crankshaft 11 rotated by a press drive unit 7 via a gear reduction unit 9. The slide 5 is connected via the connecting rod 13 engaged with the crankshaft 11 and is vertically movable. An upper sub-plate 15 having an upper die (not shown) is detachably attached to the lower portion of the slide 5.

Further, a bed 17 is integrally attached to the lower portion of the frame 3, and a lower sub-plate 19 having a lower die (not shown) is detachably attached to the bed 17.
The press machine 1 is configured by mounting 21.

Next, the press drive device 7, which is the main part of this embodiment, will be described in more detail.

Referring to FIG. 1, a range A shown in the figure shows a clutch / brake device 23, and a range B shows a speed reducer 25. The clutch / brake device 23 has a well-known configuration, and only the main parts will be described and the details will be omitted.

A casing 27 is detachably provided on the frame 3 (partly not shown) via a bolt and a support block 63 (63 on the left side in the drawing of the two 63 shown in the drawing). That is, the frame 3 is provided with a cylindrical support block 63, and the support block 63 has a ring member 63 that constitutes a part of the casing 27 (of the two 63 shown in the drawing, the 63 on the right side in the drawing). ) Is detachably provided via a bolt. A cylindrical input shaft 31 is rotatably supported in the casing 27 via a bearing 29, and a flywheel 33 is locked to the tip (right side in FIG. 1) of the input shaft 31.

Further, a pin 35 is mounted on the side opposite to the flywheel of the input shaft 31, and a clutch friction plate 37a composed of a plurality of plates and movable in the axial direction is engaged with the pin 35. The other clutch friction plate 37b that can be locked and separated from the clutch friction plate 37a is engaged with the clutch hub 39 so as to be movable in the axial direction, and the clutch hub 39 is locked with the first output shaft 41.

The first output shaft 41 is rotatably supported in the input shaft 31 via a bearing 45, and rotatably supported in the casing 27 via a bearing 43.

Further, a brake hub 47 is provided on the first output shaft 41 adjacent to the clutch hub 39, and a brake friction plate 49 composed of a plurality of brake hubs 47 is movable in the axial direction.
The other side of the brake friction plate 49a, which is engaged with the brake friction plate 49b and can be locked and separated from the brake friction plate 49b, is engaged with the pin 51 provided on the bearing block 27.

The clutch friction plates 37a, 37b and the brake friction plates 49a, 49b
A cylinder device 53 equipped with a piston 55 is mounted in between,
By the cylinder device 53, the brake friction plates 49a and 49b are constantly pressed and locked. An oil passage 57 for operating the piston 55 is bored in the shaft core of the first output shaft 41, and a sun gear 59 is provided at the other end (left side in FIG. 1) of the first output shaft 41. ing.

That is, the clutch / brake device A includes the cylinder device 53.
Is released, the first output shaft 41 relative to the casing 27 is released from the fixed state and the first output shaft 41 is synchronized with the input shaft 31.
Or the connection state of the first output shaft 41 and the input shaft 31 is released and the first output shaft 41 is fixed to the casing 27 synchronously.

On the other hand, the second output shaft 61 is rotatably supported by a support block 63 provided on the frame 3 via a bearing 65, and a planetary gear 69 is rotatably supported by a shaft 67 locked to the second output shaft 61.
Is installed. The planet gear 69 is the first output shaft.
It meshes with the sun gear 59 provided in 41 and also meshes with the internal gear 71 engraved in the ring member 63. Furthermore, the second
A pinion 73 is provided at the tip of the output shaft 61 (left side in FIG. 1).
Is fixed, and the gear 75 meshing with the pinion 73 is fixed to the crankshaft 11 (not shown).

With the above configuration, the flywheel 33 is rotated by an electric motor (not shown). On the other hand, due to the operation of the cylinder device 53, the clutch friction plates 37a and 37b are pressed and locked to each other, the rotational power is transmitted from the flywheel 33 to the clutch hub 39 via the clutch friction plates 37a and 37b, and the first output shaft 41 is Rotate. At this time, the brake friction plates 49a and 49b become free, and the braking force is released.

As the first output shaft 41 rotates, the planetary gear 69
The second output shaft 61 decelerates and rotates via the. By the rotation of the second output shaft 61, the gear 75 is rotated by the pinion 73, the crankshaft 11 of the press machine 1 is rotated, and the slide 5 is moved up and down to perform the press work.

 The operation of this embodiment is summarized as follows.

That is, the operation of the clutch / brake device A releases the fixed state of the first output shaft 57 with respect to the casing 27 and connects the first output shaft 57 to the input shaft 31 synchronously. Then, the flywheel 033 is rotated to rotate the input shaft 31, thereby rotating the first output shaft 57 integrally with the input shaft 31, and the action of the sun gear 59 and the planetary gear 69 causes the second output shaft 57 to rotate. 61 is rotated in conjunction with the rotation of the first output shaft 57. As a result, the crankshaft 11 can be driven to rotate and the slide 5 in the press machine can be moved up and down.

When the slide 5 cannot be moved up and down, the clutch / brake device A is actuated to release the connection state between the first output shaft 41 and the input shaft 31 and synchronously fix the first output shaft 41 to the casing 27. This makes the flywheel 33
Even if is rotated, the first output shaft 41 and the second output shaft 61 do not rotate.

A sun gear 59 is provided coaxially with the first output shaft 41 at one end of the first output shaft 41, and a planetary gear 69 capable of meshing with the sun gear 59 is provided at the other end of the second output shaft 61. 2 output shaft 61
Since it is provided eccentrically with respect to the shaft center of
Even when 41 and the second output shaft 61 are coaxial with each other, one end of the first output shaft 41 and the other end of the second output shaft 61 can be interlockingly connected. In other words, one end of the first output shaft 41 and the second output shaft
The first output shaft 41 and the second output shaft 61 can be coaxial with each other even if the other end of 61 is interlocked and connected. Where the first output shaft
Since 41 and the input shaft 31 are coaxial, the input shaft 31, the first output shaft 41, and the second output shaft 61 are all coaxial.

Further, when performing maintenance on the clutch / brake device A, the input shaft 31, and the first output shaft 41, the one end portion of the first output shaft 41 and the second output shaft 41 are released by releasing the meshed state of the sun gear 59 and the planetary gear 69. The casing is detached from the frame 3 while releasing the connection state of the other end of the shaft 61. by this,
The casing 27 including the clutch / brake device A, the input shaft 31, and the first output shaft 41 can be easily positioned at a low position apart from the frame 3, and the clutch / brake device A, the input shaft 31, and the first output Perform maintenance on the shaft 41.

2 and 3 show another embodiment in which no reduction ratio is required, that is, the clutch
The output of the first output shaft 41 of the brake device 23 is supplied to the second output shaft 7
In the case where the output is from the pinion 73 provided on the 7, 81, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the drive device 7 shown in FIG. 2, the sun gear 59 provided on the first output shaft 41 is meshed with the internal gear 79 provided on the second output shaft 77 to be integrated, and the rotation is directly transmitted to the second output shaft 77. It is a structure to transmit.

Further, in the drive device 7 shown in FIG. 3, the sun gear 59 provided on the first output shaft 41 is meshed with the internal gear 79 provided on the plate 83 integrally fixed to the second output shaft 81 to rotate the sun gear 59. The second directly
The configuration is such that it is transmitted to the output shaft 81.

With the above configuration, when the reduction ratio is not required, the first
The second output shaft 77, 81 can be directly connected to the output shaft 41,
The effect is similar to that of the first embodiment.

(Effects of the Invention) As can be understood from the above description of the embodiment,
According to the present invention, a driving gear is provided at one end of the first output shaft.
One end of the first output shaft is provided by providing a driven gear that is coaxial with the output shaft and eccentrically with respect to the shaft center of the second output shaft at the other end of the second output shaft. Even if the section and the other end of the second output shaft are interlocked and coupled, the first output shaft and the second output shaft can be made coaxial, and thus the input shaft,
Both the first output shaft and the second output shaft can be coaxial. Therefore, the vertical space of the press drive device can be reduced, the vertical work space can be prevented from being reduced, and the workability of maintenance of the mold and the like in the press machine can be improved.

Further, a casing having a clutch / brake device, an input shaft, and a first output shaft is detachably provided on the frame, and one end of the first output shaft and the second output shaft are released by releasing the meshing state of the drive gear and the driven gear. Since the connection state at the other end can be released, the clutch / brake device, input shaft, and first output shaft can be maintained at a low position apart from the frame without removing the crankshaft from the frame. , Further improves the workability of maintenance.

[Brief description of drawings]

FIG. 1 shows the main part of the present invention, and an enlarged sectional view of the I arrow part in FIG. 4, FIGS. 2 and 3 show another embodiment of the present invention, and FIGS. Both are enlarged sectional views of the same portion as FIG. 1, and FIG. 4 is a side view of a press machine of one embodiment for carrying out the present invention. 1 …… Press machine, 7 …… Drive device 23 …… Clutch / brake device 25 …… Reduction device, 31 …… Input shaft 33 …… Flywheel, 41 …… First output shaft 61 …… Second output shaft, 69 …… Planetary gear 77 …… Second output shaft, 81 …… Second output shaft

Claims (1)

(57) [Scope of utility model registration request] 1. A press shaft drive device for rotationally driving a crank shaft in a press machine, wherein a casing is detachably provided on a frame of the press machine, and a cylindrical input shaft integrally provided with a flywheel is provided in the casing. A rotatably provided first output shaft coaxially with the input shaft is rotatably provided in the input shaft to release the fixed state of the first output shaft from the casing and to synchronize the first output shaft with the input shaft. A clutch / brake device for connecting or disconnecting the connection between the first output shaft and the input shaft and fixing the first output shaft to the casing synchronously is provided in the casing, and the first output shaft is provided on the frame. A coaxial second output shaft is rotatably provided, one end of the second output shaft is interlockingly connected to the crankshaft, and one end of the first output shaft and the other end of the second output shaft are interlockingly connected. Therefore, a drive gear is provided coaxially with the first output shaft at one end of the first output shaft, and a driven gear that can mesh with the drive gear is provided at the other end of the second output shaft. A press drive device characterized by being provided eccentrically with respect to.