JPS591025A - Driving device - Google Patents

Abstract

PURPOSE:To set a bending angle of a pipe easily and accurately, by providing respective supporting axes to respective eccentric positions of two mutually separated gears, and one end of a driving link is connected to the axis of one side freely rotatably, and the middle part of the link is connected to the axis of the other side in the same manner. CONSTITUTION:A rotating quantity of a driving prime mover 21 for bending is determined by rotating a motor 26, used for controlling the bending quantity, by a quantity corresponding to a desired bending quantity of a pipe 16, and the prime mover 21 is rotated simultaneously. Thus, a pinion gear 23 turns in the direction of the arrow to rotate gears 29 and 30 in the same direction and by the same angle theta each. Accordingly, bending-supporting axes 35, 36 are turned by the same angle theta each to move a driving link 18 along a circular arc having a radius corresponding to the distance between the supporting axes 35, 36 and the gear axes 33, 34. Therefore, a driving pin 19 also moves along a circular arc having the same radius around a bending ring, a rotating center, to turn a bending arm 12 in the direction of the arrow by a set angle theta. Then the pipe 16 is bent by a radius of curvature R.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device that provides driving force to various mechanical devices such as bending devices.

The object of the present invention is to provide a drive device that applies a driving force to a driven member of a mechanical device to cause it to move in an arc.

The drawings showing the embodiments of the present application will be described below.

l is bending equipment (also called pipe bender)
A chuck moving rail 2 is formed on the upper part of the frame. Reference numeral 3 denotes a chuck, and 4 a chuck moving table, which are movably mounted on the chuck moving rail 2 via rollers 5. The chuck moving table 4 is automatically fed when necessary by a feeding mechanism (not shown). Further, the chuck moving table 4 has a built-in chuck rotation mechanism. Reference numeral 6 denotes a head frame fixed to the tip of the frame l, and a pivot support 68 is formed on one side of the front part. Furthermore, a sliding guide portion 6b is formed on the front surface of the head frame 6 in a direction perpendicular to the chuck moving rail 2. Reference numeral 7 denotes a bending shaft rotatably attached to the shaft support 6a of the head frame 6 via a bearing (not shown). Reference numeral 8 denotes a pressure-type slide base that is slidably fitted into a dovetail groove on the sliding guide portion 6b of the head frame 6. This pressure-type slide base 8 and a hydraulic cylinder (v!J) built in the head frame 6 (not shown) so that it can be slid an appropriate amount. 9 is a pressure shaft fixed to the pressure type slide table 8, and 10 is a pressure type rotatably attached to the pressure shaft 9. This pressure @ 10 is detachably attached to the pressure shaft 9 so that it can be replaced with another pressure type having a different outer diameter, etc., if necessary.

U is a bending die with a radius of curvature attached to the bending shaft 7 so as to rotate together with it. This bending die U is detachably attached to the bending shaft 7 so that it can be replaced with another bending die having a different radius of curvature, etc., if necessary. Reference numeral 12 denotes a bending arm in which a shaft support 12a is attached to the shaft 7 so as to rotate together with the bending arm, and a sliding guide portion 12b is formed in the front portion in a substantially radial direction of rotation. The cram is a clamping type slide table that is slidably fitted into a dovetail groove on the sliding guide part 12b, and the clamping type slide table l and a hydraulic cylinder (not shown) built in the bending arm are used to generate an appropriate amount of pressure. It is designed to be slid. 14 is attached to the tightening type slide assembly) 1
A clamping die attached to the bending die 5 is disposed between the bending die 11 and the outer periphery of the bending die 11 so as to be able to fasten a pipe 16 as a member to be bent. ν is a locking portion formed at the opening of the clamping mold slide, and is designed to receive the reaction force of the clamping mold 14.

Next, in the drive device, there is a drive link, the tip of which is rotatably connected to the bending arm ν via a drive pin 19. Reference numeral 20 denotes a drive unit which, as shown below, moves the drive link so that its axes always remain parallel at any movement position, and in a state where the parallel state is maintained, connects the drive link to the connecting position (drive pin 19) to the bending arm ν. It is configured to move in a circular arc with the distance between it and the bending axis 7 as a radius. In the drive mechanism, 4 is a bending drive prime mover, n is a drive shaft of the bending drive prime mover 4, and phantom is a pinion gear fixed to the drive shaft η. In addition, Jun is a control shaft for controlling the amount of rotation of the drive motor 4, 5 is a belt pulley fixed to the control shaft, and a transmission bell is connected between this belt pulley 2 and the belt pulley 7 of the bending control motor I. ) 2B is hanging. Incidentally, it is preferable to use computer-controlled pulse motors as the bending control motors because highly accurate control can be performed. Numerals 4 and 30 are gears of the same size that are meshed with the pinion gears, and are fixed to gear shafts O and 34, which are rotatably supported by gear bearing boxes M and 32, respectively. Ah, 36 is a support shaft that is attached to the gear 29.3), and the position of the drive pin 19 with respect to the bending shaft 7 is the same '-phase angle position, that is, the gear shaft field, and the line connecting it with 34 is the bending shaft 7. At a position parallel to the line connecting the drive pin 19 and the gear shaft (
, 34 is the same as the distance between the drive pin 19 and the bending shaft 7. To these bending shafts 36 are rotatably connected for drive links.

In the case of the above structure, when bending the pipe 16 with the radius of curvature R, first slide the pressure type slide table 8 and the clamp type slide table toward the front in FIG. is positioned between the bending mold 11 and the clamping mold 14, and one end of the pipe 16 is gripped by the chuck 3. After that, the chuck moving table 4 is manually or automatically moved by a desired amount to determine the bending position of the pipe 16, and then the pressure mold slide table 8 and the clamping mold slide table opening are slid in the opposite direction to the above, As shown in FIG. 1, a pressure mold 10 and a clamping mold are pressed against the pipe 16, and the pipe tube is bent and clamped between the outer periphery of the mold U and the clamping mold 14. In this case, the pressure mold 10 is adjusted to the diameter of the bending mold U so that the portion of the pipe 16 clamped by the bending mold U and the clamping mold 14 and the portion gripped by the chuck 3 are straight. The size of the diameter is determined.

Also, bending mold 11. The sizes of the contact grooves of the pressure mold 1o and the clamping mold 14 are also determined to be suitable for the thickness of the pipe 16. Thereafter, the bending control motor 4 is rotated by an amount corresponding to the desired bending amount of the pipe to determine the amount of rotation of the bending drive prime movers, and at the same time, the bending drive prime mover 4 is rotationally driven. As a result, the drive shaft n of the bending drive motor 4 rotates by a set amount, and the pinion gear rotates in the direction of the arrow, and the two gears S and a meshing with this pinion gear.
Rotate O in the same direction by the same angle amount 0 (0=?θ degree in the drawing) as shown by the arrow.

Therefore, the bending support shaft 35 also rotates in the same direction by the same angular amount 0 while maintaining the same angular phase. In this way, the bending shafts 35, 36 rotate synchronously whenever the angle phase changes, so the drive links rotatably connected to these bending shafts 35, 35 have their axes aligned. It always remains parallel at any moving position, and each part has a bending support shaft 35.
．． 36 and the gear shaft field, an arc movement is performed with the radius being the distance between 34. Therefore, the drive pin 19 also moves in an arc of the same radius about the bending axis 7, and the bending arm ν is rotated by a set angle θ in the direction of the arrow as shown in FIG. As a result, the positive beam is bent with a radius of curvature R as shown in FIG. As mentioned above, since the rotational force in the drive machine horizontal cylinder is transmitted to the bending arm ν in the same direction and by the same angle, the bending angle can be set extremely easily and accurately, and the power loss can be reduced. In addition, since the bending arm ν is rotated by the drive link as described above, the bulk of the head portion can be reduced, and the bending interval can be increased as shown in Figures 1 and 2. Even if the pipe is small, it can be easily bent by inserting the pipe part under the bending arm ν of the head part. After that, the pressure type slide table 8 and the clamp type slide table part are slid toward the front side to release the fastening of the pipe clamp, and the subsequent drive mechanism is operated to return to the position shown in Fig. 1. return to position.

Next, if you want to bend the pipe 16 with a different radius of curvature r, remove the bending die U from the bending shaft 7, and
A bending fille with a radius of curvature r prepared in advance as shown in the figure
exchange with. In addition, the pressure IJ110 is also
Replace the pressure mold 10e with a pressure mold 10e having an outer diameter size suitable for the above.

The outer diameter of the pressure mold 1015 is determined to be such that the pressure mold 10el comes into contact with the pipe 16 when the pressure mold slide table 8 is slid as shown in FIG. after that,
By performing the bending process in the same manner as described above, the Shivive irises can be bent with a radius of curvature r. As described above, by preparing several bending molds and pressure molds with different diameters and attaching appropriate ones, it is possible to bend the shivive sheet with various radii of curvature. In addition, in the drive mechanism of the above embodiment, two gears are used to move the drive link in parallel, but instead of these gears, a parallel link that rotates around the position of the gear axis is used. Good <,
The synchronous rotation of the IT gear shaft may be performed using a rack.

As described above, the present invention has the advantage that driving force can be generated in the drive link by rotating the two gears.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 7 is a perspective view, FIG. 2 is a perspective view showing an operating state, and FIG. 3 is a perspective view showing a replacement bending die and pressure die. 6...Head frame, 7...Bent axis, ■...Bending mold, ν...Bending arm, 14...Tightening mold, 16.
...Pipe, sliding...drive link, processing...drive mechanism.

Claims (1)

[Claims] Each of the two gears spaced apart from each other is provided with a spindle at an eccentric position, and one end of the drive link is rotatably attached to one of the spindles, and an intermediate portion of the drive link is rotatably attached to the other. A drive device characterized by being connected to.