JP5610580B2 - Swing drive mechanism - Google Patents

Description

  The present invention relates to a mechanism for swinging (oscillating or weaving) a welding torch in a direction x that intersects the welding direction y.

  The swing drive device described in Patent Document 1 supports a swing member rotatably around a middle pendulum shaft (fulcrum), supports a torch at one end of the swing member, and biases the other end. Oscillation is driven by the rotation of the lead cam. The pendulum shaft is fitted in the slide groove of the swing member, and the swing member reciprocates with respect to the pendulum shaft (fulcrum) with the elliptical motion of the other end of the swing member due to the rotation of the eccentric cam. The pendulum shaft (fulcrum) is coupled with a nut that is screwed onto the screw rod. The rotation of the screw rod causes the pendulum shaft to move in the sliding direction along the slide groove. ), The swinging width around the pendulum axis changes. That is, the swing width can be adjusted by turning the screw rod.

Japanese Utility Model Publication No. 6-66867

  However, the torch is supported by one end of the swing member, the other end is directly driven to swing by the rotation of the eccentric cam, and the swing member is slidable and supported by the pendulum shaft (fulcrum). The load of the core cam rotation and the load supported by the pendulum shaft are large, and it is difficult to smoothly perform the wide swing with a low load.

  It is an object of the present invention to smoothly perform a wide swing with a low load.

(1) A pendulum shaft (22) that is rotatable about an axis and is fixed to the machine body and extends in the welding direction y;
A first pendulum stem (23) having a cam hole (23b) through which the tip of the pendulum shaft (22) is fixed and extends in the vertical direction z and into which the swing roller (21) enters;
A swing drive shaft (19) parallel to the pendulum shaft (22), which drives the swing roller (21) in an eccentric position to drive eccentric rotation;
An amplitude adjusting screw (26) extending in the vertical direction z;
A slide block (28) which the amplitude adjusting screw (26) is screwed and is driven up and down by rotation of the amplitude adjusting screw;
A slide plate (29) supported by the slide block (28) and vertically moved by the vertical movement of the slide block (28);
A rotating arm (31) that is supported by the slide plate (29) and is rotatable about the axis of the scanning shaft (30) extending in the welding direction y;
The slidable on the slide block (28) in the vertical direction z, a long guide hole (35) in the vertical direction z, the second pendulum stem (34) of the pendulum pivoting around the axis extending in the welding direction y;
Rail (15) fixed to the body and extending in the swinging direction x;
A carriage (24) supported by the rail (15) and movable in the swing direction x;
A swing arm (5) fixed to the carriage (24) and extending in the swing direction x for supporting the welding torch (7);
A guide groove (23a) on one of the first pendulum trunk (23) and the rotating arm (31) and extending in the vertical direction z;
A plurality of copying rollers (32, 33) on the other of the first pendulum trunk (23) and the rotating arm (31) and distributed in the vertical direction z and entering the guide groove (23a);
A pendulum roller (36) that is rotatable about an axis that is in one of the slide plate (29) and the carriage (24) and extends in the welding direction y; and
A pendulum (25) fixed to the other of the slide plate (29) and the carriage (24), having a guide groove (25a) extending in the vertical direction z into which the pendulum roller (36) enters;
A swing drive mechanism comprising:

  In addition, in order to facilitate understanding, in parentheses, the correspondence of the examples shown in the drawings and described later, or the symbols or corresponding matters of corresponding elements are added for reference. The same applies to the following.

In the swing drive mechanism, the first pendulum stem (1) includes a guide groove (23a) in the first pendulum stem (23), and a plurality of copying rollers (32, 33) in the rotary arm (31). 23) a plurality of copying rollers (32, 33), a rotating arm (31) having a guide groove (23a) 1-2, a slide plate (29) with a pendulum roller (36), and a carriage (24) There are a mode 2-1 having a pendulum (25) and a mode 2-2 having a pendulum roller (36) in the carriage (24) and a pendulum (25) in the slide plate (29) .

  The first form of (1) is a combination of the above aspects 1-1 and 2-1, the second form is a combination of the above aspects 1-1 and 2-2, and the third form is the above aspects 1-2 and 2- The combination of 1 and the fourth form is a combination of the above aspects 1-2 and 2-2. The following (2) is the first form. Below, it demonstrates based on a 1st form (form (2) below).

When the oscillating drive shaft (19) is driven to rotate, the center of rotation of the oscillating roller (21) rotates on a circumference centered on the axis of the drive shaft (19). As a result, the first pendulum trunk (23) performs a pendulum motion around the pendulum shaft (22). By this pendulum movement, the whole of the plurality of copying rollers (32, 33) also performs a pendulum movement, and the rotating arm (31) supporting these copying rollers (32, 33) moves the copying shaft (30). Rotates to the center and also performs a pendulum movement. Since the scanning axis (30) is supported by the slide plate (29), the slide plate (29) and its second pendulum stem you movably guided in the vertical direction z (34) is, scanning is pendulum driven The roller (36) reciprocates or swings the pendulum (25) in the x direction, and the swing arm (5) fixed to the carriage (24) moves in the x direction perpendicular to the welding direction y and the vertical direction z. Rocks. When the amplitude adjusting screw (26) is turned in the screw loosening direction, the slide block (28) is lowered, and the copying roller (32, 33) is lowered in the guide groove (23a) of the first pendulum trunk (23). The swing (pendulum) amplitude of the first pendulum stem (23) is constant, but the swing amplitude of the pendulum roller (36) increases. That is, the swinging amplitude of the pendulum roller (36) is increased by the rotation in the loosening direction of the amplitude adjusting screw (26), and is decreased by the rotation in the tightening direction. The oscillation amplitude can be adjusted by turning the amplitude adjusting screw (26).

Swing arm which supports in addition to a pendulum roller (36) can be increased swing drive with small width swing drive of the first pendulum stem (23), the welding torch (7) (5), the rail (15) Since the load (the welding torch 7 to the swing arm 5) is supported by the rail (15) via the carriage, the swing load of the pendulum roller (36) is Light and wide swinging can be performed smoothly with low load. Further, when there is only one copying roller (32, 33), when an external force is applied to the welding torch (7 ) and a braking force or an acceleration force is applied to the slide plate (29) with the pendulum roller (36) , The slide plate (29) shifts and rotates around the copying roller, and the midpoint of the pendulum movement shifts in the swing direction x. However, by using a plurality of copying rollers (32, 33) distributed in the vertical direction z as in the present invention, even if an external force is applied to the welding torch (7), the slide plate (29) has one copying roller. It does not rotate about the center, and even if an external force is applied to the torch, the swinging motion does not shift in the swinging direction x.

It is a rear view which shows the external appearance of one Example of the 1st form of this invention. It is a longitudinal cross-sectional view of the rocking mechanism box 4 in FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. FIG. 4 is a perspective view showing the rocking mechanism elements shown in FIG. 3 with the mutual coupling between them separated.

(2) a pendulum shaft (22) that is rotatable about an axis and is fixed to the machine body and extends in the welding direction y;
A first pendulum stem (23) having a guide groove (23a) extending in the vertical direction z and a cam hole (23b) into which the swing roller (21) enters is fixed to a tip end portion of the pendulum shaft (22). );
A swing drive shaft (19) parallel to the pendulum shaft (22), which drives the swing roller (21) in an eccentric position to drive eccentric rotation;
An amplitude adjusting screw (26) extending in the vertical direction z;
A slide block (28) which the amplitude adjusting screw (26) is screwed and is driven up and down by rotation of the amplitude adjusting screw;
Can be slid in the slide block (28) in the vertical direction z, a long guide hole (35) in the vertical direction z, the second pendulum stem (34) of the pendulum pivoting around the axis extending in the welding direction y;
A slide plate (29) supported by the slide block (28) and vertically moved by the vertical movement of the slide block (28);
A pendulum roller (36) that is supported by the slide plate (29) and is rotatable about an axis extending in the welding direction y;
The entering into the guide groove (23a) equipped plurality of scanning rollers (32, 33), shaft copying extending the welding direction y of the first pendulum stem distributed vertically z (23) the axis (30) A rotating arm (31) rotatable around the center;
Rail (15) fixed to the body and extending in the swinging direction x;
A carriage (24) supported by the rail (15) and movable in the swing direction x;
A swing arm (5) for supporting the welding torch (7) fixed to the carriage (24) and extending in the swing direction x; and
A pendulum (25) fixed to the carriage (24) having a guide groove (25a) extending in the vertical direction z into which the pendulum roller (36) enters;
A swing drive mechanism comprising:

(3) The swing drive mechanism according to (1) or (2), wherein the plurality of copying rollers are two (32, 33) and are positioned symmetrically with respect to the copying shaft (30). According to this, the rotation of the rotary arm 31 around the scanning shaft (30) via the scanning rollers (32, 33) due to the pendulum movement of the first pendulum trunk (23) is stabilized, and the scanning shaft (30 ) Facilitates the pendulum drive of the slide plate (29) .

  (4) A driven bevel gear (19) fixed to the swing drive shaft (19), a drive bevel gear (17) meshing with the driven bevel gear, and a reduction mechanism having an output shaft fixed to the drive bevel gear ( 16) and the swing drive mechanism according to any one of (1) to (3), further comprising an electric motor (10) that rotationally drives the input shaft of the speed reduction mechanism. According to this, the electric motor (10) is extended in the x direction behind the swing arm (5) that supports the welding torch (7) in the forward direction and extends in the swing direction x. Can be arranged. That is, the electric motor can be arranged at a position farthest from the welding torch (7) (a position that does not interfere with the welding operation).

  Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

  FIG. 1 shows a welding apparatus equipped with the swing drive mechanism of the first embodiment of the present invention. The self-propelled carriage 1 is provided with two wheels in the front and two in the rear, a total of four wheels, a speed reduction mechanism for rotating these wheels, and an electric motor. Further, there are two copying rollers protruding in the side x direction from the main body of the cart, one in the front and one in the rear, and the self-propelled cart 1 has two on the horizontal base material (horizontal steel plate). The copying rollers self-travel in the welding direction y so that both the copying rollers come into contact with the vertical base material (vertical steel plate).

  A self-propelled carriage 1 supports a support base 3 of a swing drive mechanism via an x position adjustment mechanism 2. When the adjustment knob protruding to the right of the x position adjusting mechanism 2 is turned clockwise, the support base 3 (swinging drive mechanism) moves to the right, and when it is turned counterclockwise, it moves to the left. A swing mechanism box 4 is mounted on the support base 3. A swing arm 5 extending in the x direction protrudes from the swing mechanism box 4, and a left end portion of the swing mechanism box 4 supports a welding torch 7 via a posture and an x, y, z position adjusting mechanism 6. By manual operation with respect to the posture and the x, y, z position adjusting mechanism 6, the inclination (rotation angle about the axis parallel to the welding direction y) and each position of x, y, z of the welding torch 7 can be adjusted. 8 is a torch height adjustment knob for adjusting the position of the torch in the vertical direction z, 9 is a gripping rod extending in the y direction, which is perpendicular to the paper surface, for carrying the welding apparatus, and 10 is an electric motor which is a swing drive motor , 11 is a knob for adjusting the amplitude of the torch swing drive, 12 is a power switch of the equipment on the carriage excluding the welding power source, and 13 is a swing switch for swinging / stopping the torch.

  FIG. 2 shows a vertical section (xz section) of the swing mechanism box 4 shown in FIG. The base plate 14 of the swing mechanism box 4 and several kinds of standing plates and frames provided on the bottom plate 14 constitute a swing drive mechanism body, and the swing mechanism element is rotatably supported or fixed by the body. The amplitude adjustment knob 11 is connected to the amplitude adjustment screw 16. An input shaft of the reduction gear 16 is coupled to the rotation shaft of the electric motor 10, and a drive bevel gear 17 is fixed to the output shaft.

  FIG. 3 shows a cross section taken along line III-III in FIG. A disc 20 is fixed to the end (right end) of the swing drive shaft 19 that is the gear shaft of the driven bevel gear 18 that meshes with the drive bevel gear 17, and the swing roller is positioned at the eccentric position of the disc 20. (Bearing roller) 21 is mounted. The swing roller 21 enters a cam hole 23b (FIG. 4) in the first pendulum trunk 23. The first pendulum trunk 23 is fixed to the tip (right end) of the pendulum shaft 22 that is rotatably supported by the machine body.

  FIG. 4 shows main swing mechanism elements mainly composed of elements driven by the swinging roller 21 shown in FIG. Please refer to FIG. 3 and FIG. In this embodiment (first mode), the first pendulum trunk 23 has a guide groove 23a that is long in the vertical direction z, and two copying rollers 32 and 33 enter the guide groove 23a (FIG. 3). These copying rollers 32 and 33 are attached to the rotating arm 31. The copying rollers 32 and 33 are distributed in the vertical direction z, and have a copying shaft 30 at an intermediate point therebetween, and are fixed to a slide plate 29 that passes through the rotary arm 31 and is fixed to the slide block 28. The rotating arm 31 is rotatable with respect to the copying shaft 30 around the axis of the copying shaft 30. The slide block 28 has a female screw hole extending in the vertical direction z, and the amplitude adjusting screw 26 is threaded through the female screw hole. The amplitude adjusting screw 26 is connected to the round bar 26a by a universal joint 26b that enables tilting in two horizontal axes perpendicular to the vertical direction z. The round bar 26a cannot be moved up and down in the z direction by a bracket 27 fixed to the airframe, but is supported so as to be capable of rotating around an axis, and an amplitude adjustment is provided at an upper end protruding above the bracket 27. A knob 11 is fixed. When the amplitude adjusting knob 11 is turned clockwise, the block 28 is raised, and the rotary arm 31 and the copying rollers 32 and 33 supported thereby move upward with respect to the first pendulum trunk 23. Conversely, when the amplitude adjustment knob 11 is turned counterclockwise, the block 28 is lowered, and the rotary arm 31 and the copying rollers 32 and 33 supported thereby move downward with respect to the first pendulum trunk 23.

  In this embodiment, the bearing hole 39b, which is roughly cylindrical, is opened in the bottom of the U-shaped groove 39a of the connector 39 whose groove is cut in the middle and the outer shape is concave (U-shaped frame), The copying rollers 32 and 33 penetrating through the pendulum shaft 22 and entering the first pendulum trunk 23 and its guide groove 23b, and the rotating arm 31 and the slide plate 29 supporting these copying rollers are fitted in the U-shaped groove 39a. (Figure 3). The slide plate 29 is integrally fixed to the slide block 28, but the portion of the slide block 28 connected to the slide plate 29 is constricted, and this constricted portion penetrates the guide hole 35 of the U-shaped second pendulum trunk 34. However, it is supported and guided by a guide hole 35 so as to be movable in the vertical direction z. In other words, the upper end of the U-shaped portion of the second pendulum trunk 34 is inserted into the space of the constricted portion of the slide block 28 from below the space. As a result, the slide block 28 can slide up and down in the vertical direction z with respect to the second pendulum trunk 34. There are four screw-through holes 37 at the upper end of the second pendulum trunk 34, and are aligned with the female screw holes 38 on the distal end surface of the connector 39. The upper end portion of the second pendulum stem 34 is fixed to the connector 39 by screwing each screw (not shown) into each screw threading hole 37, and the second pendulum stem 34 is attached to the pendulum shaft 22. It can rotate (pendulum movement) around the axis.

The position of the lower end portion of the second pendulum stem 34, the pendulum roller 36 is located. The pendulum roller 36 is mounted on the lower end of the slide plate 29 with its axis aligned with the welding direction y. A rail 15 extending in the swing direction x is fixed to the bottom plate 14 of the swing mechanism box 4, and the carriage 24 to which the swing arm 5 (FIG. 3) extending in the swing direction x is fixed is moved in the swing direction. x is supported so as to be slidable back and forth. In this embodiment, a pendulum 25 is fixed to the carriage 24 and the swing arm 5. The pendulum 25 has a guide groove 25a extending in the vertical direction z. The pendulum roller 36 is fitted into the guide groove 25a and can slide up and down with respect to the guide groove 25a. When the rotary arm 31 moves through the scanning rollers 32 and 33 by the pendulum movement of the first pendulum trunk 23, the slide plate 29 that supports the scanning shaft 30 rotates (pendulum movement ), and the pendulum roller 36 moves the pendulum 25. Is reciprocated in the swing direction x (swing drive; pendulum motion drive) and moves up and down with respect to the pendulum 25. Similar to the reciprocating motion of the pendulum 25, the carriage 24 and the swing arm 5 reciprocate. This reciprocating motion of the swing arm 5 is swing, and the welding torch 7 swings in the same manner as this swing.

Next, the operation of each mechanism element by the rotation of the electric motor 10 will be described. When the swing switch 13 is switched from OFF to ON, the electric motor 10 starts rotating, the driven bevel gear 18 is rotated via the reduction gear 16 and the drive bevel gear 17, and the swing roller 21 is driven to the driven bevel gear. It rotates along a circumference centering on the axis of the swing drive shaft 19 as a shaft. That is, it rotates eccentrically. By this rotation, the first pendulum trunk 23 performs a pendulum motion in the swing direction x around the axis of the pendulum shaft 22. By this pendulum movement, the copying rollers 32 and 33, the rotating arm 31, the copying shaft 30, the slide plate 29, and the slide block 28 similarly perform the pendulum movement to drive the second pendulum trunk 34 in a pendulum manner. The pendulum roller 36 drives the pendulum 25 by the pendulum movement of the slide plate 29 , and the swing arm 5 fixed to the pendulum 25 via the carriage 24 repeats reciprocating movement in the x direction. That is, rocking (oscillation; weaving).

1: Cart 2: x position adjustment mechanism 3: swing mechanism support base 4: swing mechanism box 5: swing arm 6: posture and x, y, z position adjustment mechanism 7: welding torch 8: torch height adjustment knob 9: Grip bar 10: Electric motor 11: Amplitude adjustment knob 12: Power switch 13: Oscillating switch 14: Bottom plate 15: Rail 16: Reduction gear 17: Drive bevel gear 18: Driven bevel gear 19: Oscillation drive shaft 20 : Disc 21: swing roller 22: pendulum shaft 23: first pendulum stem 23 a: guide groove 23 b: cam hole 24: carriage 25: pendulum 25 a: guide groove 26: amplitude adjusting screw 26 a: round bar 26 b: universal joint 27 : Bracket 28: Slide block 29: Slide plate 30: Copying shaft 31: Rotating arms 32 and 33: Copying roller 34: Second pendulum stem 35: Guide hole 36: Pendulum roller 37: Screw And hole 38: female screw hole 39: consolidated 39a: co circular grooves 39 b: Bearing hole

Claims (4)

A pendulum shaft that is rotatable about an axis and is fixed to the airframe and extends in the welding direction y;
A first pendulum stem having a cam hole into which the tip of the pendulum shaft is fixed and extends in the vertical direction z and into which the swing roller enters;
An oscillating drive shaft parallel to the pendulum shaft for driving the oscillating roller in an eccentric position to drive eccentric rotation;
An amplitude adjusting screw extending in the vertical direction z;
A slide block that is engaged with the amplitude adjusting screw and is driven up and down by rotation of the amplitude adjusting screw;
A slide plate that is supported by the slide block and moves up and down as the slide block moves up and down;
Rotation arm of the rotation allowed about the axis of the copying shaft being supported by said slide plate extending in the welding direction y;
A second pendulum stem having a long guide hole in the vertical direction z that can slide in the vertical direction z and pivoting about an axis extending in the welding direction y;
Rails fixed to the body and extending in the swing direction x;
A carriage supported by the rail and movable in the swing direction x;
A swing arm for supporting the welding torch fixed to the carriage and extending in the swing direction x;
A guide groove on one of the first pendulum trunk and the rotating arm and extending in the vertical direction z;
A plurality of copying rollers on the other of the first pendulum trunk and the rotating arm and distributed in the vertical direction z and entering the guide groove;
A pendulum roller which is rotatable about an axis extending in the welding direction y on one of the slide plate and the carriage; and
A pendulum fixed to the other of the slide plate and the carriage, having a guide groove extending in the vertical direction z into which the pendulum roller enters;
A swing drive mechanism comprising: A pendulum shaft that is rotatable about an axis and is fixed to the airframe and extends in the welding direction y;
A first pendulum stem having a guide groove extending in the vertical direction z and having a guide groove extending in the direction and a cam hole into which the swing roller enters;
An oscillating drive shaft parallel to the pendulum shaft for driving the oscillating roller in an eccentric position to drive eccentric rotation;
An amplitude adjusting screw extending in the vertical direction z;
Slide blocks that amplitude adjustment screw is driven up and down by the rotation of the screwed amplitude adjustment screw;
該Su can ride block slides vertically z, has a long guide hole in the vertical direction z, the second pendulum stem of pendulum rotation about the axis extending in the welding direction y;
A slide plate that is supported by the slide block and moves up and down as the slide block moves up and down;
A pendulum roller which is supported by the slide plate and is rotatable about an axis extending in the welding direction y;
A rotating arm equipped with a plurality of scanning rollers distributed in the vertical direction z and entering the guide groove of the first pendulum trunk and rotatable about the axis of the scanning shaft extending in the welding direction y;
Rails fixed to the body and extending in the swing direction x;
A carriage supported by the rail and movable in the swing direction x;
A swing arm for supporting the welding torch fixed to the carriage and extending in the swing direction x; and
A pendulum fixed to the carriage having a guide groove extending in a vertical direction z into which the pendulum roller enters;
A swing drive mechanism comprising:

  The swing drive mechanism according to claim 1, wherein the plurality of copying rollers are two and are positioned symmetrically with respect to the scanning axis.   A driven bevel gear fixed to the swing drive shaft, a drive bevel gear meshing with the driven bevel gear, a reduction mechanism having an output shaft fixed to the drive bevel gear, and an input shaft of the reduction mechanism are driven to rotate. The swing drive mechanism according to any one of claims 1 to 3, further comprising an electric motor.

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