JPS6113177Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oscillating device for a welding torch, and more particularly to an oscillating device configured to start weaving by a planetary gear mechanism. In this specification, the term "oscillate" is used when referring to the device, and the term "weaving" is used when referring to the movement itself.

Various means and devices have been proposed and put into practical use as welding electrode oscillation devices, but those that utilize a planetary gear mechanism as a weaving trajectory generating mechanism are relatively compact and lightweight; Moreover, it has the advantage of fewer failures. Furthermore, since such an oscillating device can easily select the amplitude of weaving over a wide range, it is used not only for welding butt portions but also for other welding portions, and is applied to all welding positions.

By the way, in a trajectory generating mechanism using a planetary gear mechanism, an internal gear is inscribed and externally connected to an external gear, and the pinion rotates on its own axis as if being swung around, and weaving is performed by an arm rod attached to the rotating shaft of the pinion. A trajectory is created. The stroke width is determined by the rotation set position of the internal gear and external gear, and this setting can be changed at any time by operating the rotation knob, or it can be fixed at a specific position. In the latter case, a separate amplitude change adjustment device is often installed. Fig. 1 is a partially cutaway side view showing an example of an oscillation device using a planetary gear mechanism, in which a small gear inscribed in an internal gear is a planetary gear, and the internal gear rotates to a free position. Indicates something that can be adjusted dynamically. That is, the oscillating device is comprised of a housing 1 and a drive motor 2 attached to the top side of the housing, and the housing 1 is fixed to a suitable part of the welding device by any attachment means. The device for starting the weaving is housed inside the housing 1, and the mounting member 6 that supports the torch 7 is partially inserted through the window hole 3b of the cover plate 3 attached to the front side (right side in the figure) of the housing 1. stands out. Note that 3a is a rear cover plate. torch 7
is clamped to the mounting member 6 by a mounting member 6a, and its mounting position and direction can be freely adjusted by loosening the mounting member 6a. Further, although the torch 7 is shown as having its tip side curved downward, the shape of the torch may be arbitrary. Incidentally, the torch supporting arm member may be held between the mounting member 6 if necessary.

On the other hand, the mounting member 6 is formed integrally with the moving member 5, or is formed separately and fixed to the moving member 5. The moving member 5 is slidably provided on slide shafts 4, 4a fixedly provided within the housing 1. Although the figure shows the attachment member 6 fixedly attached to the movable member 5, it is recommended that the attachment member 6 be made pivotable so that it can be rotated at an appropriate pivoting position. Further, although a pair of slide shafts 4, 4a is shown, the design can be changed as appropriate, such as by arranging a block with a slide groove formed inside the housing instead of these slide shafts 4, 4a. A slide groove perpendicular to the slide shaft is formed on the back side of the movable member 5 configured in this manner.

On the other hand, the reciprocating movement of the movable member 5 is performed by the positional variation of the movable ball 9 loosely mounted in the slide groove, and the amount of positional variation in the direction perpendicular to the slide groove 8 (in the drawing, the penetrating direction) The moving member 5 reciprocates in response to this.

On the other hand, the position of the moving ball 9 is changed as follows.

That is, a shaft 12 is loosely supported on the rear side of the approximately center of the housing 1, and the shaft 12 is supported by walls 1a, 1a provided inside the housing 1, respectively, and miter gears 11, 11a attached to the output shaft of the motor 2. driven by. A rotating body 13 is placed on the front side of the shaft 12.
Attach. The rotating body 13 has a disk portion formed at the tip of a cylinder shaft 13a, and the cylinder shaft 1
3a is fixed to the shaft 12. On the other hand, a boss portion of an internal gear 14 is freely supported on the outer periphery of the cylindrical shaft 13a via a bearing. A step part is formed in the boss part and a worm wheel 16 is fitted and fixed therein, and a worm (not shown) is engaged with the worm wheel 16, and the worm passes through the housing 1 in the vertical direction and is loose. It is fixed to the provided knob shaft 18. Therefore, the rotation of the internal gear 14 is regulated by the worm, and the rotation of the internal gear 14 can be freely adjusted by rotating the knob shaft 18. On the other hand, the rotating body 13
The disk portion is formed to fit in the cavity of the internal gear 14, and a support portion is integrally formed on the front side of the disk portion. The shaft 15a is freely supported. A small gear 15 is fixed to the shaft 15a, and the small gear 15 is engaged with the tooth row of the internal gear 14 to form a planetary gear. The amount of eccentricity between the shaft 12 and the shaft 15a is set to 1/4 of the pitch circle diameter of the internal gear 14, and the pitch circle diameter of the small gear is set to 1/2 that of the internal gear. Further, one end of the shaft 15a protrudes from the support portion, and one end of the arm rod 10 is fixed to the protrusion. A support shaft is attached to the other end of the arm rod 10, and the movable ball 9 is rotatably mounted on the support shaft. Therefore, the small gear 15 rotates while being swung around by the rotation of the rotating body 13, and displaces the movable ball 9. In the case of the above-mentioned dimensional relationship, the movable ball 9 can be moved up and down along the slide groove 8, and the weaving width can be changed from zero to the pitch circle diameter of the internal gear.

Further, FIG. 2 shows an embodiment in which the internal gear 14 is fixedly provided, and the internal gear 14a is as follows:
Although it is shown that it is attached to the partition wall 1b provided in the housing 1, it may be fixedly attached to another mounting step. The internal gear 14a is constructed of a support member 20 and a ring gear 19 attached by forming a step inside the support member, and the ring gear 19 is fixed concentrically with the support member 20. . When installing the support member 20, as shown in FIG. 3 (installation sectional view), legs 20a are formed on the mounting surface side of the support member 20, and legs 20a are formed on the mounting surface of the mounting wall 1b. It is recommended that they be made concentric by fitting into the annular groove 1c. On the other hand, a rotating body 13 configured and rotated in the same manner as in the case of FIG. are interlocked. In such a fixed internal gear 14, since the displacement amount of the movable ball 9 is constant, the reciprocating movement of the movable member 5 is introduced into the changing device 17 to change the speed or change the stroke to change the position of the mounting member 6b. It is recommended that the information be communicated to

By the way, in such a planetary gear mechanism, pinion 1
The shaft 15a supporting the rotating body 1 (planetary gear) 5 (planetary gear)
3, and since the rotating body 13 is supported on a cantilever, the revolution shaft 12, the support shaft 15a, and these are connected to each other by the reaction force of the rotational force acting on the pinion. The disk portion that is in contact with the disk undergoes elastic deformation. Furthermore, since these bearings are worn out, they tend to become rattled, and as a result, the pinion 15 is lifted up from the internal gear, which disturbs the weaving trajectory, or uneven wear occurs between the gears, making the weaving speed uneven. There are drawbacks such as. Therefore, measures have been taken to strengthen these parts, such as increasing the rigidity of these parts, increasing the diameters of the support shaft 15a and shaft 12, and increasing the thickness of the rotating body 13. This led to a reversal and other countermeasures became necessary.

The present invention has been made with attention to these points, and it is an object to provide an oscillation device equipped with a planetary gear mechanism that does not have the above-mentioned drawbacks.
However, the present invention like this is to form an abutment surface concentric with the tooth peripheral surface on the engaging gear of the internal gear or the external gear, and to form a contact surface concentric with the tooth peripheral surface, and also to form a part of the revolving disk that supports the planetary gear. A pulley is provided, and the pulley is configured to rotate while in contact with the contact surface.

The present invention will be explained in detail below based on the drawings. The drawings show, as a representative example, the present invention applied to the planetary gear mechanism illustrated in FIG. The same applies to other oscillation devices. Further, the configuration is not limited to the illustrated example, and the configuration can be similarly implemented by changing the shape of the component parts or changing a part of the design according to the purpose of the front and back.

FIG. 5 is a sectional view showing the present invention corresponding to FIG. 3, and FIG. 6 is a right side view thereof. In these figures, 21 indicates a contact surface, which is formed concentrically with the periodontal circle (pitch circle) of the internal gear and parallel to the tooth row surface. The internal gear in the figure is the ring gear 19.
and the supporting member 20, the corresponding contact surface 21 is provided so as to be concentric with the periodontal circle and the inner circumferential surface of the mounting step portion of the ring gear 19, and to be orthogonal to the tooth row surface of the ring gear 19. Further, the corresponding contact surface 21 is smoothly raised to form a lubricating oil groove as required. On the other hand, the rotating body 13 can be the same as the conventional one, but it is recommended that the disk portion 13a be made thick as shown in the figure, and a pulley 22 is provided on the side opposite to the side on which the small gear 15 is attached. When installing the pulley 22, it is recommended that the disk portion 13b of the rotating body 13 be formed and the pivot shaft of the pulley 22 implanted therein. Further, the axis includes a ring gear 19 and a small gear 1.
5 and the center of rotation of the rotating body 13 (center of the shaft 12), and the pulley 22
Provided at a position such that the outer surface of the contact surface 21 contacts the contact surface 21. When installing the pivot, it should be configured so that it can be moved along the diameter line, and the pulley can be replaced and the contact can be adjusted, and it is recommended that the pulley 22 be made of synthetic resin with excellent mechanical strength. .

7 and 8 are explanatory diagrams showing other configuration examples of the present invention, in which the contact surface 21 is formed concentrically with the internal gear 14, and FIG. 7 shows the rotating body 13. It shows what is configured as a single character-shaped member 13c,
The relationship between the contact surface and the pulley 22 is the same as described above.

Figure 8 shows an example where two pulleys are installed, pulley 22
a and 22b are respectively pivoted as described above, but when arranging them, the contact point between the small gear 15 and the internal gear 14 and the pivot position of each pulley are divided by 120 degrees from the center of rotation of the rotating body 13. Positional relationship. Further, it is recommended that the rotating body be a triangular disk 13d, and the structure for attaching the pulley is the same as in the previous example.

In all of these embodiments, the small gear 15 (planetary wheel) is installed inside the internal gear 14, but the present invention can also be applied to a circumscribed planetary gear device. 9 and 10 are a plan view and a side view showing an example of the circumscribed type, in which a contact surface 24 is formed on the lower surface side of the external gear 23, and the contact surface 24 is
3. The circumferential surface is concentric with the rotating body 13. The external gear 23 is fixed to a shaft 23a, but the shaft 23a is provided so that it can be fixedly arranged or rotated as appropriate. On the other hand, as the rotating body 13, a single-letter-shaped disk 13c is shown, and a small gear 15 that engages with the external gear 23 is attached to the disk 13c.
(planetary wheel) will be installed. An arm rod (not shown) is attached to the rotating shaft of the small gear 15 to create weaving, and a pulley 22 is loosely supported on the opposite side of the disk 13c to connect the small gear 15 and the pulley 2.
2 are arranged so as to sandwich the contact surface 24. Further, the disk 13c has its boss portion connected to the shaft 23a.
It is mounted freely on the shaft and rotated by another suitable drive hand. In addition, when using a plurality of pulleys 22 (for example, three), the peripheral surface of the corresponding contact surface 24 is divided into 120-degree sections at other parts other than the attachment portion of the small gear 15, and the divided pulleys 22 are arranged on the disk 13c. In this case, it is preferable that the disk 13c be a circular disk.

Further, when there are two pulleys 22, one of the pulleys may be freely supported on the boss shaft of the small gear 15 and brought into contact with the contact surface.

In the present invention, since the oscillating device equipped with a planetary gear mechanism is configured as described above, the rotating body 13
However, since the small gear and pulley rotate extremely stably and smoothly, the small gear does not float and become disengaged as in the conventional case.

Uneven wear on internal and external gears and small gears is eliminated, allowing the small gears to rotate smoothly.

Effects such as these can be obtained, and the weaving trajectory will not be disturbed or movement speed unevenness will not occur.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing an example of an oscillation device equipped with a planetary gear mechanism, FIG. 2 is a partially cutaway side view showing an example of an oscillation device equipped with a planetary gear mechanism having another configuration, and FIG. The figure is a partially cutaway side view enlarging the main part of Figure 2, Figure 4 is a cross-sectional view taken along the cutting line - in Figure 3 in the direction of the arrow, and Figure 5 shows the present invention applied to the one in Figure 3. A sectional view, FIG. 6 is a sectional view taken along the cutting line - in FIG. 5, in the direction of the arrow;
7 and 8 are explanatory views showing another embodiment, and FIGS. 9 and 10 are a plan view and a side view showing another embodiment of the present invention. 1... Housing, 4... Slide shaft, 5... Moving member, 7... Torch, 8... Slide groove, 13...
Rotating body, 14... Internal gear, 15... Small gear, 1
6...Worm wheel, 18...Knob shaft, 19
...Ring gear, 20... Supporting member, 21... Contact surface, 22... Pulley, 23... External gear.

Claims (1)

[Scope of utility model registration request] In an oscillating device in which a planetary gear is rotated while revolving along the teeth of an engagement gear that meshes with the planetary gear, and a weaving is taken out from the rotating shaft of the planetary gear, the engagement gear is provided with a weaving gear that is concentric with the periodontal circle. An oscillating device characterized in that a pulley is provided on a part of a revolving disk that forms the surface and supports the planetary gear, and the pulley is brought into contact with the contact surface and rotated.