JPH06207644A - Linear differential gear and feeder of transfer press using the same - Google Patents

Abstract

PURPOSE:To make possible traverse and vertical movement of a trolley with a simple mechanism without using a large-scaled complicated cam, large-scaled feed arm and a plurality of links. CONSTITUTION:A liner differential gear comprises a carrier 11 rotatably driven about the axis X, a plurality of planet bevel gears 13 supported by the carrier and freely rotatable about the axis Y radially orthogonal to the axis X, two pinion gears 15, 16 provided on both sides of the carrier to be rotated about their own axes and having on the sides bevel gears 14 meshing with a plurality of the planet bevel gears 13 and two rack teeth 18, 19 respectively meshing with the pinion gears, and guided to move straight in the diametrically opposite direction and parallel to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer press feeder, and more particularly, to a linearly operating gear device and a transfer press feeder using the same.

[0002]

2. Description of the Related Art A transfer press is an apparatus for sequentially pressing a work by a plurality of linearly arranged presses, and has been widely used for press work of a work such as an automobile door. In such a transfer press, for example, as shown in FIG. 6, the lower mold 1 of the press is arranged at a predetermined interval, and a plurality of trolleys 3 provided with a handling tool 2 such as a vacuum cup are sequentially lifted, traversed,
The work 4 is lowered and sent to the adjacent press. The feeding device of such a transfer press is
For example, the feed arm 6 is swung by the cam drive 5, and the trolley 3 is traversed and lifted by the feed arm and various link mechanisms.

[0003]

The above-mentioned conventional transfer press feeding device drives the trolley through a large and complicated cam arm, a large feeding arm, a large number of links and pins, a sector gear, and the like. However, there is a problem that the mechanism is complicated and the device becomes large. Further, there is a problem that it is difficult to perform highly accurate positioning due to the bending of the arm and the accumulation of backlash of each part of the complicated mechanism.

The present invention was created to solve such problems. That is, an object of the present invention is to allow a trolley to traverse and ascend and descend with a simple mechanism without using a large and complicated cam arm, a large feed arm, and a large number of links, and high position accuracy.
An object is to provide a small-sized transfer press feeding device.

[0005]

According to the present invention, there is provided a disc-shaped carrier which can be rotationally driven about an axis,
A plurality of planet bevel gears supported by the carrier and freely rotatable about a radial axis orthogonal to the axis of the carrier; and planetary bevel gears provided on both side surfaces of the carrier and rotated about the axis of the carrier. 2 has bevel gears which are possible and mesh with the plurality of planet bevel gears
A pair of pinion gears, and two rack members having rack teeth meshing with each of the pinion gears and guided so as to be linearly movable parallel to each other on diametrically opposite sides. A linear differential gear device is provided. Furthermore, according to the present invention, a disk-shaped carrier that can be driven to rotate about an axis, and a disk-shaped carrier that is supported by the carrier and that freely rotates about a radial axis that is orthogonal to the axis of the carrier. A plurality of possible planet bevel gears, and two pinion gears provided on both side surfaces of the carrier, rotatable about an axis of the carrier, and having bevel gears on the side faces that mesh with the plurality of planet bevel gears; Two rack members having rack teeth meshing with each of the pinion gears and guided so as to be linearly movable parallel to each other on diametrically opposite sides,
An equalizer pinion that meshes with both of the rack members and can freely rotate about an axis, and is supported so as to be movable in the horizontal direction, supports the equalizer pinion, and connects the two rack members in the horizontal direction. And a feed drive pinion meshing with the feed rack teeth, and a feed drive pinion that meshes with the feed rack teeth. It According to a preferred embodiment of the present invention, a horizontal lifting drive rod connected to the rack member,
A vertical trolley rod provided on the feed beam so as to be movable up and down and provided with a handling tool at the lower end, a pulley provided on the feed beam so as to be rotatable about an axis, and the lifting drive via the pulley. A trolley unit including a flexible rod and a flexible member connecting the trolley rod.

[0006]

According to the structure of the present invention, when the feed drive pinion is rotated, the feed beam meshing with the pinion is horizontally moved, and the trolley connected to the feed beam can be traversed. At this time, the equalizer pinion fixed to the feed beam does not rotate, and both of the two rack members meshed with the equalizer pinion move horizontally along with the feed beam, so that each of the two rack members is The two pinion gears meshed with each other rotate in opposite directions, but these two pinion gears mesh with a plurality of planet bevel gears, and the plurality of planet bevel gears idle (spin) around their axes. It has no effect on the rotation of the carrier. On the other hand, when the carrier is rotated, the plurality of planet bevel gears revolves without rotating, and the two pinion gears meshing with the planet bevel gears rotate in the same direction to horizontally move the two rack members in opposite directions. Let By the relative movement of at least one of the rack members, the trolley connected to the feed beam can be moved up and down. At this time, since the equalizer pinion fixed to the feed beam idles around its axis, there is no influence on the movement of the feed beam and the rotation of the feed drive pinion. Therefore, the trolley can be traversed by the rotation of the feed drive pinion, and the trolley can be lifted and lowered by the rotation of the carrier, and can be driven and controlled completely independently of each other without interfering with each other.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a linear differential gear device according to the present invention. In this figure, a linear differential gear device 10 according to the present invention is a disk-shaped carrier 11 that can be driven to rotate about an axis X, and a radial carrier that is supported by the carrier 11 and that is orthogonal to the axis X of the carrier 11. A plurality of planet bevel gears 13 that can freely rotate about an axis Y, and a plurality of planet bevel gears 13 that are provided on both side surfaces of the carrier 11 and that can rotate about an axis X of the carrier 11 and that can rotate.
Two pinion gears 15 and 16 each having a bevel gear 14 that meshes with each other, and rack teeth that mesh with each of the pinion gears 15 and 16, and are linearly movable parallel to each other on diametrically opposite sides. The upper and lower rack members 18 and 19 are guided. Carrier 1
Reference numeral 1 has a drive shaft 11a, and a gear 21 adapted to be rotationally driven by a lift drive pinion 20 is fixed to one end of the drive shaft 11a. The pinion gears 15 and 16 are the carrier 1
One drive shaft 11a is supported by a bearing 16a so as to be freely rotatable.

2 and 3 are sectional views taken along the line AA of FIG. 1, and FIG. 2 is a lift drive pinion 20 (FIG. 1).
Shows the case where the drive shaft 11a and the carrier 11 are rotated, and FIG. 3 shows the case where both of the two rack members 18 and 19 are moved in the same direction. In FIG. 2, when the shaft 11 a and the carrier 11 are rotated, the plurality of planet bevel gears 13 revolve without rotating, and the two pinion gears 1 meshing with the planet bevel gears 13 are rotated.
5 and 16 rotate in the same direction to rotate the two rack members 18,
It is possible to horizontally move 19 in opposite directions.
On the other hand, in FIG. 3, even if both of the two rack members 18 and 19 are moved in the same direction, the two pinion gears 15 and 16 meshed with the two rack members 18 and 19 are Although rotating in mutually opposite directions, the two pinion gears 15 and 16 are provided as a plurality of planetary bevel gears 13.
Since the plurality of planet bevel gears 13 idles (spins) around the axis thereof, the rotation of the carrier 11 is not affected at all.

FIG. 4 is a side view showing a transfer device of a transfer press using the linear differential gear device 10 described above. In this figure, the linear differential gear device 10 constitutes the right gear of the three pinion gears shown in the figure, and two rack members 18 and 19 extend in the horizontal direction. The transfer device of the transfer press according to the present invention further includes an equalizer pinion 22 that meshes with both of the rack members 18 and 19 and is freely rotatable about an axis, and the two rack members 18 and 19 in the horizontal direction. Feed beam 24 movably guided and having horizontal feed rack teeth 23
And a feed drive pinion 26 that meshes with the feed rack teeth 23. The feed beam 24 is supported by a guide (not shown) so as to be movable in the horizontal direction. The central axis of the equalizer pinion 22 is fixed to this feed beam 24. With this configuration, the feed drive pinion 2
When 6 is rotated, the feed beam 24 meshing therewith is moved horizontally, so that the trolley connected to the feed beam 24 can be traversed. At this time, the equalizer pinion 22 fixed to the feed beam 24 does not rotate, and the two rack members 18, which mesh with the equalizer pinion 24,
Both 19 move horizontally with the feed beam 24, which causes the two pinion gears 15, 16 meshing with each of the two rack members 18, 19 to rotate in opposite directions. The pinion gears 15 and 16 mesh with the plurality of planet bevel gears 13, and the plurality of planet bevel gears 13 idle (spin) around their axes, so that they do not affect the rotation of the carrier.

FIG. 5 shows a trolley unit 30 for traversing and elevating a vertical trolley rod 34 having a handling tool (not shown) at its lower end. In this figure, the trolley unit 30 is the rack member 1
A vertical trolley rod 32 which is connected to at least one of 8 and 19 and which is vertically movable, and which is provided on the feed beam 24 'so as to be vertically movable and has a handling tool (not shown) at its lower end. 34, a pulley 36 rotatably provided on the feed beam 24 about a horizontal axis,
It comprises a flexible member 38 that connects the lifting drive rod 32 and the trolley rod 34 via the pulley 36.
The feed beam 24 in the trolley unit 30 does not have the feed rack teeth 23 described above, and may be any member that extends horizontally. Therefore, the feed beam 24 shown in FIG. 4 and the feed beam 24 'shown in FIG. 5 are not necessarily integrated and may be connected by a bolt or the like. Flexible member 38
Is, for example, a thin metal strip plate, wire, or the like, and it is preferable that it is difficult to stretch even when subjected to a tension, and can bend freely. Both ends of the flexible member 38 are fixed to the lifting drive rod 32 and the trolley rod 34, respectively, by suitable fasteners. With such a configuration, the trolley rod 34 can be traversed by the horizontal movement of the feed beam 24 '.
Moreover, the relative horizontal movement of the rack member 18 (or 19) allows the trolley rod 34 to be moved up and down via the flexible member 38. In this configuration, since racks and pinions are not used to convert horizontal motion to vertical motion, there is no backlash and power can be converted accurately without oiling. In addition, the trolley unit has a simple structure and is inexpensive and lightweight.

As described above, according to the present invention, when the feed drive pinion 26 is rotated, the feed beam 24 meshing with the pinion 26 is horizontally moved, and the trolley connected to the feed beam 24 can be traversed. it can. At this time, the equalizer pinion 22 fixed to the feed beam 24 does not rotate, and both of the two rack members 18, 19 meshing with the equalizer pinion 22 move horizontally with the feed beam 24, thereby The two pinion gears 15 and 16 meshing with the respective rack members 18 and 19 rotate in mutually opposite directions, but the two pinion gears 1
Reference numerals 5 and 16 mesh with a plurality of planet bevel gears 13, and the plurality of planet bevel gears 13 idle (spin) around the axis Y thereof, so that the rotation of the carrier 11 is not affected at all. On the other hand, when the lift driving pinion 20 is rotated to rotate the carrier 11, the plurality of planet bevel gears 13 revolve without rotating, and the two pinion gears 15 and 16 meshing with the planet bevel gears 13 move in the same direction. It rotates to horizontally move the two rack members 18 and 19 in opposite directions. By the relative movement of at least one of the rack members 18 and 19, the trolley connected to the feed beam 24 can be moved up and down by the trolley unit 30 described above. At this time, since the equalizer pinion 22 fixed to the feed beam 24 idles around its axis, the feed beam 24 moves and the feed drive pinion 26 moves.
Has no effect on the rotation of. Therefore, the trolley can be traversed by the rotation of the feed drive pinion 26, and the trolley can be moved up and down by the rotation of the carrier 11, and can be driven and controlled completely independently of each other without interfering with each other. it can. The elevation drive pinion 20 and the feed drive pinion 26 may be rotationally driven individually by using servomotors, or may be individually or interlocked and driven by cams. Also,
Traverse and elevating of the trolley have no effect on each other, so traverse and elevating may be performed simultaneously. Further, if a handling tool is attached to the rotary shaft of the pulley 36 of the trolley unit, the workpiece can be traversed and rotated.

[0012]

INDUSTRIAL APPLICABILITY The above-described linear differential gear device and the transfer press feed device using the same do not use a large and complicated cam arm, a large feed arm, or a link at all. In addition, the structure is simple and there is little bending or play. Therefore, according to the present invention, it is possible to traverse and ascend and descend the trolley with a simple mechanism without using a large and complicated cam arm, a large feed arm, and a large number of links, and high position accuracy. It is possible to provide a small-sized transfer press feeding device. Further, by the combination of the linear differential gear device of the present invention,
Since a plurality of trolleys of the terminal are provided with a feed direction and a direction orthogonal thereto or a rotary motion, it can be widely applied as a logistics robot or a handling device.

[Brief description of drawings]

FIG. 1 is a perspective view showing a linear differential gear device according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 showing a case where the carrier 11 is rotated by rotating the lifting drive pinion 20.

FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1 showing a case where both of the two rack members 18 and 19 are moved in the same direction.

FIG. 4 is a side view showing a transfer device of a transfer press using the linear differential gear device 10.

FIG. 5 is a view showing a trolley unit that raises and lowers a trolley rod.

FIG. 6 is a schematic view of a transfer device of a conventional transfer press.

[Explanation of symbols]

 1 Lower type of press 2 Vacuum cup (handling tool) 3 Trolley 4 Work 5a Cam drive 5b Cam arm 6 Feed arm 10 Linear differential gear unit 11 Carrier 11a Drive shaft 13 Planetary bevel gear 14 Bevel gear 15 and 16 Pinion gear 16a Bearings 18 and 19 Rack member 20 Elevating drive pinion 22 Equalizer pinion 23 Feed rack tooth 24 Feed beam 26 Feed drive pinion 30 Trolley unit 32 Elevating drive rod 34 Trolley rod 36 Pulley 38 Flexible member X Carrier axis Y Planet Bevel gear axis

Claims (3)

[Claims] 1. A disk-shaped carrier that can be driven to rotate about an axis, and a plurality of disc-shaped carriers that are supported by the carrier and can freely rotate about a radial axis that is orthogonal to the axis of the carrier. A planetary bevel gear, two pinion gears provided on both side surfaces of the carrier, rotatable on an axis of the carrier, and having bevel gears on the side surfaces that mesh with the plurality of planetary bevel gears, and the pinion. A linear differential gear device comprising: two rack members having rack teeth that mesh with respective gears and guided so as to be linearly movable parallel to each other on diametrically opposite sides. 2. A disk-shaped carrier that can be rotationally driven about an axis, and a plurality of disc-shaped carriers that are supported by the carrier and can freely rotate about a radial axis that is orthogonal to the axis of the carrier. A planetary bevel gear, two pinion gears provided on both side faces of the carrier, rotatable about an axis of the carrier, and having bevel gears on the side faces that mesh with the plurality of planetary bevel gears, and the pinion. Two rack members having rack teeth that mesh with each of the gears and guided so as to be linearly movable in parallel to each other on diametrically opposite sides, and centered on an axial center that meshes with both of the rack members. Freely rotatable equalizer pinion and horizontally movably supported to support the equalizer pinion and to move the two rack members horizontally. Guided to, and a feed beam having a horizontal feeding rack teeth, a feed drive pinion to the rack teeth meshing for the feed,
The transfer press feeder is characterized by comprising. 3. A horizontal ascending / descending drive rod connected to the rack member, a vertical trolley rod provided at the lower end of the feed beam so as to be movable up and down, and a shaft center of the feed beam. 7. A trolley unit comprising: a pulley that is rotatably provided around the shaft; and a flexible member that connects the lifting drive rod and the trolley rod via the pulley. The transfer press feeding device described in 2.