JPH05123862A - Device for traveling automatic cutter - Google Patents

Abstract

PURPOSE:To improve working accuracy by building in adjusting mechanism for number of revolutions in a case rotated with driving force of a traveling device arranged at the front of a automatic cutter. CONSTITUTION:In the traveling device in the self-traveling type automatic cutter 10 for executing the cutting work with a working device fitted to the side part, the traveling device 11 having travel driving power of the cutter 10, the adjusting mechanism 15 for number of the revolutions built in the front part of the cutter and wheels 14 for supporting as freely traveling a worm gear and the cutter 10 connected with each other inbetween both, are provided. By this method, the automatic cutter 10 can smoothly be advanced along a curve having the prescribed radius of curvature and a torch nozzle can be shifted at the time of advancing along the curve in the same velocity as a velocity at the time of advancing straight and the working accuracy is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling device for an automatic cutting machine, which is capable of self-propelling and cutting a member with a processing device attached to a side portion.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a semi-automatic cutting machine 1 utilizing gas fusing has a traveling part 2 provided at a tip end thereof and capable of traveling through the entire device.
The torch 3 for cutting the material in the vicinity of is supported so as to project to the side. The traveling unit 2 has wheels 5 at both ends of an axle 4 that is rotatably provided in the width direction.
It is configured by attaching. And semi-automatic cutting machine 1
Is self-propelled when the axle 4 is rotatably driven by a drive motor connected to the center of the vehicle while the operator is supporting the rear part of the device by hand.

[0003]

However, in the case of the above automatic cutting machine, the following problems have occurred. That is, when the material is cut into an arc shape with a constant radius of curvature, the semi-automatic cutting machine 1 has a moving distance that is longer on the outer side than on the inner side of the curve during bending, so that the wheel positioned on the outer side is longer. The number of revolutions of wheel 5 should be higher than that of the wheel 5 located on the inner side, but the wheels 5, 5 are connected to each other by the axles 4 and always rotate at the same number of revolutions. The operator must manually slide the wheel 5 forward in the traveling direction with respect to the traveling direction of the wheel 5. Therefore, the semi-automatic cutting machine 1 ignores the original rotational speed when advancing the outer wheels 5 by the supporting force of the operator, making it difficult to proceed on a desired curve and lowering the machining accuracy. There is a problem of doing.

Further, in view of the above problems, if the wheels 5 and 5 are attached to single-acting axles, the wheels 5 rotate at a substantially desired number of revolutions when the vehicle moves forward, but a semi-automatic cutting machine. Since the traveling direction of No. 1 depends on manual guidance by the operator, it is difficult to rotate each wheel 5 at the ratio of the rotational speeds corresponding to the traveling distances of each of the wheels 5 during the curving, which leads to the processing accuracy. There is also the problem of dissatisfaction.

The present invention has been made in view of the above-mentioned problems, and the ratio of the rotational speeds of the wheels 5 and 5 located on the left and right of the semi-automatic cutting machine 1 is set to a traveling distance at a desired radius of curvature when curving. It is an object of the present invention to provide an automatic cutting machine in which the semi-automatic cutting machine 1 accurately advances along a desired curve and the processing accuracy is improved.

[0006]

In the automatic cutting machine of the present invention, a traveling device for generating a driving force for traveling the automatic cutting machine, a rotation speed adjusting mechanism built in a front portion of the automatic cutting machine, A worm gear that is interposed between the rotation speed adjustment mechanism and the traveling device to connect them, and a pair of wheels that are arranged on the left and right sides of the rotation speed adjustment mechanism with their rotation axes on the same axis to support the automatic cutting machine in a freely movable manner. A case in which one side end is fixed to the wheel of the worm gear and is rotatably attached about the axis of the rotating shaft, and the rotation speed adjusting device is fixed to the base end of each rotating shaft. And the first and second drive gears built in the case, a revolution shaft rotatably attached to the radial end of the rotation of the case in parallel with the axis of the rotation shaft, and the revolution shaft. The first and second drive gears fixed to the shaft A first drive gear and a second planetary gear, a second drive gear and a first planetary gear, which are the same and mesh with each other. Forming the set as a gear ratio equal to the square root of the ratio of the distances of the wheels from the torch crater was the means for solving the above problems.

[0007]

According to the traveling device for an automatic cutting machine of the present invention, each drive gear and planetary gear set is constructed with a gear ratio equal to the parallel root of the ratio of the distance from the torch crater to each wheel. Wheels rotate at a rotational speed of a ratio equal to the distance ratio. Further, since each planetary gear is attached to the case through a rotatable revolution shaft, the rotational force is transmitted at a rotation speed of a ratio equal to the distance ratio regardless of the rotation of the case by the driving force of the traveling device. To do.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 10 in the figure is an automatic cutting machine of the present embodiment.

As shown in FIGS. 1 and 2, the automatic cutting machine 1
Reference numeral 0 denotes a traveling device 11 that generates a driving force for the automatic cutting machine 10 to travel, a gear box 12 that is built in the front part of the automatic cutting machine 10, a traveling device 11 that is built in the gear box 12 and Connected to the worm gear 13 and rotated, a pair of wheels 14 disposed on the left and right of the worm gear 13 with the rotation shaft 14a on the same axis line to support the automatic cutting machine 10 in a freely movable manner, and a gear box 12. It is configured with a rotation speed adjusting mechanism 15 which is built in the inside and is rotatably attached around the axes of the axles 14, 14.

The worm gear 13 is a first transmission gear 11b fixed to the tip of the drive shaft 11a of the traveling device 11.
Then, the driving force of the traveling device 11 is transmitted to the rotation speed adjusting mechanism 15 by being connected to the traveling device 11 via the second transmission gear 11c meshed with the first transmission gear 11b. The driving force transmitted to the second transmission gear 11c is transmitted to the worm gear 13 by rotating the worm 13a, and the worm wheel 13b connected from the worm 13a to the worm 13a.
Is transmitted to drive this.

The rotation speed adjusting mechanism 15 has one side end fixed to the wheel of the worm gear 13 and a case 16 mounted rotatably around the axis, and fixed to the base end of each rotary shaft 14a. The first and second drive gears 17 and 18 that are installed inside the case 16 and the end of the case 16 in the radial direction of rotation that is parallel to the above-mentioned axis and is parallel to the case 16
A revolving shaft 19 rotatably attached to the revolving shaft 19, and the first and second drive gears 17 and 18 fixed to the revolving shaft 19.
First and second planetary gears 20, 21 meshing with
It consists of and.

The first drive gear 17 and the second planetary gear 2
The first and second drive gears 18 and the first planetary gears 20 are formed to have the same size. First drive gear 1
The gear ratio of 7 and the second planetary gear 21 to the second drive gear 18 and the first planetary gear 20 is the left side part in the traveling direction (upper side in the figure) via the mounting bracket in the front part of the automatic cutting machine 10. From the torch crater 10a protruding to each wheel 14
Is equal to the square root of the ratio of the distances.

That is, the outer peripheral lengths of the first drive gear 17 and the second drive gear 18 are X1, X2, and the first planetary gear 2
0 and the outer circumference lengths of the second planetary gears 21 are Y1 and Y2, the ratio of the distances from the torch crater 10a to the wheels 14 is a:
The relationship of the outer peripheral lengths of these gears at the time of b is shown as the following formula 1 since the rotation speeds of the first planetary gear 20 and the second planetary gear 21 are both equal to the revolution axis 19. You can

[0014]

[Equation 1]

Here, since the first drive gear 17 and the second planetary gear 21, and the second drive gear 18 and the revolution shaft 19 have the same outer peripheral length, the respective values are set to m and l. For example, it can be expressed as the following Expression 2, and the above-mentioned relationship is clear.

[0016]

[Equation 2]

Referring to FIG. 2, for example, the distance between the torch crater 10a and the axle 14 attached to the left side of the automatic cutting machine 10 in the traveling direction, and the torch crater 10
When the ratio of the distance between a and the axle 14 mounted on the right side in the traveling direction of the automatic cutting machine 10 is 4: 9, the first and second drive gears 17 and 18 and the first and second planetary gears are used. 20,
21 is formed so that the ratio is 2: 3.

The operation of this embodiment will be described below. The automatic cutting machine 10 operates the traveling device 11 in a state where the operator holds the rear part of the automatic cutting machine 10 by hand, and in this state, the automatic cutting machine 10 is self-propelled by the driving force and supported by the operator. With guidance, it is designed to move forward in the desired direction.

In the self-propelled automatic cutting machine 10, the case 16 is rotated by rotating the worm wheel 13b by the driving force of the traveling device 11 according to the above-described structure, and the revolution shaft 1 is rotated.
First and second planetary gears 2 inside the case 16 via
The rotational force is transmitted to 0 and 21. The first and second planetary gears 20, 21 are respectively the first and second drive gears 17,
Revolves around 18 while revolving around, but both are revolving axis 1
9 and fixed resistance to the first and second drive gears 17 and 18 of the first and second planetary gears 20 and 21 is different from each other. 1
Both 4 and 14 transmit the same rotational force. As a result of the above, a constant rotational force is always transmitted to the revolving shaft 19 to rotate at a constant speed regardless of the operator's guiding direction.

The operator is guided by turning the rear part of the automatic cutting machine 10 to the left and right around the center of the front part so that the automatic cutting machine 10 which continues to run is centered around its own side. It is possible to move forward by drawing an arc. The automatic cutting machine 10 of the present embodiment is configured such that the center of bending is on the side of the torch crater 10a, and the rotation speed adjusting mechanism 15 is provided for self-propelled movement and manual guidance by the operator in the advancing direction. By this action, the number of revolutions of the axle 14 on the side opposite to the torch crater 10a is appropriately adjusted so that the axle 14 bends at a desired radius of curvature, and the axle 14 smoothly bends to the left in the traveling direction.

The operation of the rotation speed adjusting mechanism 15 will be described in detail below. The rotation speed adjusting mechanism 15 uses the automatic cutting machine 1 at the center of the curving.
The automatic cutting machine 10 is designed so that the left side of the vehicle is curved, and the number of rotations of the right side axle 14 is larger than that of the left side axle 14 during the bending movement.
To a desired radius of curvature. That is, at the time of curving, the worker turns the rear part of the automatic cutting machine 10 counterclockwise while the revolution shaft 19 is rotated at a constant rotation speed by the driving force of the traveling device 11, so that the automatic cutting machine 10 is rotated. The axle 14 located on the left side of the shaft has a larger rotation resistance than the axle 14 on the opposite side.
It is transmitted to the rotation speed adjustment mechanism 15 via 4a. On the contrary, the axle 14 on the right side of the automatic cutting machine 10 is subjected to a force for increasing the rotation speed by the turning, and the rotation force is transmitted to the rotation speed adjusting mechanism 15 via the rotation shaft 14a. .. Among the respective forces transmitted from the rotating shaft 14a, the reaction force transmitted from the wheel 14 located on the left side surface is
The first drive gear 17 and the first planetary gear 20 meshed with the first drive gear 17 are transmitted to the revolution shaft 19 so that the revolution shaft 19 moves in the opposite direction to the traveling direction of the automatic cutting machine 10. Acts as a force to rotate. At this time, revolution axis 1
The force to rotate 9 together with the rotation of the case 16 acts from the revolution shaft 19 to cause the second planetary gear 2 to rotate from the revolution shaft 19.
It is transmitted to the rotary shaft 14 a of the right axle 14 via the first and second drive gears 18. Then, the force transmitted through each gear is transmitted between the gears so as to increase the number of rotations each time it is transmitted. Also, regarding the rotational force transmitted from the other axle 14, the number of rotations is reduced so that the axle 1
Communicate to 4.

Specifically, for example, in the case of the automatic cutting machine 10 in which the ratio of the distance between the torch crater 10a and each axle 14 is set to 4 to 9 as described above, the first drive gear 17 is used.
On the other hand, the first planetary gear 20 rotates at 1.5 times the rotational speed, and the second planetary gear 20 rotates at the same rotational speed as the first planetary gear 20.
Since the second drive gear 18 rotates at 1.5 times the number of revolutions of the planetary gear 21, the left and right wheels 14, 14 are adjusted in their rotations with the ratio of the respective numbers of rotations being 4: 9.

Therefore, according to the automatic cutting machine of the present embodiment, the number of rotations of the left and right axles 14, 14 of the apparatus can be set as the ratio of the distance from the center of curving, so that the automatic cutting machine 10 can be operated. It is possible to smoothly advance with a desired radius of curvature, and the processing accuracy is improved. Also, the automatic cutting machine 10
Is an orbital shaft 19 rotatably attached to the case 16.
Via the axle 1 regardless of the rotation of the case 16
Since it is possible to adjust the rotational speeds of 4 and 14, it is possible to make a continuous cut without changing the cutting condition at the torch crater 10a at the time of the transition from straight to curved without changing the speed. Therefore, the processing accuracy can be further improved.

[0024]

As described above, according to the traveling device for the automatic cutting machine of the present invention, the traveling device for generating a driving force for traveling the automatic cutting machine and the built-in front part of the automatic cutting machine are provided. The rotation speed adjustment mechanism, the worm gear that is interposed between the rotation speed adjustment mechanism and the traveling device to connect them, and the rotary shafts are arranged on the left and right sides of the rotation speed adjustment mechanism on the same axis line to run the automatic cutting machine. A pair of wheels that are freely supported, a rotation speed adjusting device, a case in which one side end is fixed to the wheel of the worm gear and is rotatably attached about the axis of the rotation shaft, and each rotation First and second drive gears fixed to the base end of the shaft and housed inside the case;
A revolution shaft mounted rotatably at the radial end of the case in parallel with the axis of the rotation shaft, and fixed to the revolution shaft and meshed with the first and second drive gears. The first and second planetary gears are composed of a first drive gear, a second planetary gear, a second drive gear, and a first planetary gear that are equal to each other and mesh with each other. It is characterized in that it is formed as a gear ratio equal to the square root of the ratio of the distances of the wheels from each other. It can be smoothly curved with a radius of curvature, and processing accuracy is improved. In addition, since the automatic cutting machine can automatically adjust the rotation speed of the axle regardless of the rotation of the case via the revolution shaft rotatably attached to the case, it is possible to move straight without changing the traveling speed. It is possible to perform continuous cutting without changing the cutting conditions at the torch crater at the time of shifting to bending, and further improving the processing accuracy.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a schematic plan view showing the rotation speed adjusting mechanism.

FIG. 3 is a side view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Automatic cutting machine 10a Torch crater 11 Traveling device 13 Worm gear 14 Wheels 14a Rotating shaft 15 Rotation speed adjusting mechanism 16 Case 17 1st drive gear 18 2nd drive gear 19 Revolution shaft 20 1st planetary gear 21 2nd planet gear

Claims (1)

[Claims] 1. A traveling device of an automatic cutting machine, which is self-propelled and cuts and processes a member by a processing device attached to a side portion, the traveling device generating a driving force for the automatic cutting machine to travel. A rotation speed adjustment mechanism built in the front part of the automatic cutting machine,
A worm gear that is interposed between the rotation speed adjustment mechanism and the traveling device to connect them, and a pair of wheels that are arranged on the left and right sides of the rotation speed adjustment mechanism with their rotation axes on the same axis to support the automatic cutting machine in a freely movable manner. The rotation speed adjusting device includes a case whose one end is fixed to the wheel of the worm gear and is rotatably attached around the axis of the rotating shaft, and fixed to the base end of each rotating shaft. And the first and second drive gears built in the case, a revolution shaft rotatably attached to the radial end of the rotation of the case in parallel with the axis of the rotation shaft, and the revolution shaft. It is composed of first and second planetary gears fixed to a shaft and meshed with the first and second drive gears, and a first drive gear, a second planetary gear, and a second drive gear. The first planetary gears are equal to each other and bit Cormorants traveling device for an automatic cutter set of gears is characterized in that it is formed as a ratio equal gear ratio to the square root of the distance of each wheel from the torch crater.