JP4458596B2 - Motor with manual operation function for welding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a motor with a manual operation function for a welding apparatus in which a rotation output of a motor is converted into a reciprocating motion of a pressure shaft and a gun arm or a welding jig is operated by the pressure shaft. Is.
[0002]
[Prior art]
Conventionally, a drive source (motor) for a position adjustment actuator that converts the rotation output of the motor into a reciprocating motion of a rod (pressure shaft) and adjusts the position of the base by the pressure shaft. In Japanese Patent Laid-Open No. 9-144834, a manual gear device that meshes with a gear provided on the output shaft of the motor is provided in parallel with the motor.
[0003]
[Problems to be solved by the invention]
However, in the case of the above-described conventional device, the manual gear device is provided in parallel on the motor output shaft side separately from the motor, so that the overall scale increases and welding is performed. It is not suitable for application to a device.
[0004]
The present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is to provide a manually operated drive unit at the rear of the motor body and a rotation center axis of the motor. It is intended to provide a motor with a manual operation function for a welding apparatus that is positioned in an eccentric part from the part and is easy to install and fits in a compact manner.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a motor with a manual operation function for a welding apparatus according to the present invention is for transmitting torque to the rotation center shaft portion of the motor at the rear side of the motor body and in front of the position detector. A driven part consisting of a small manually operated gear for applying rotational torque to the driven part is located at a position eccentric from the rotational central shaft part of the motor. The manual operation portion of the drive portion is formed in the housing of the position detector .
[0006]
Moreover, the driven parts constituted by the gear, the gear of the driving part which is continued said gear and straight Sesse' form a manual rotation operable machining holes or machining projections, the manual operating section of the drive unit it is characterized in that it has a manual operation hole formed in the housing of the position detector.
[0007]
Further, the driven unit is configured with a gear, the driving unit meshing with the gear is configured with a gear, and a retracting device made of an elastic body that displaces the position of the gear of the driving unit is disposed in the manual operation unit, The retracting device is configured to retract the gear of the driving unit during motor operation.
[0008]
Further, the driven part is constituted by a gear, the driving part meshing with the gear is constituted by a gear, a guide shaft is integrally provided on the gear of the driving part, and the guide shaft is pulled out from the manual operation part. It is characterized in that the gear of the drive unit can be removed outside the motor during motor operation.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a cross-sectional view of an essential part of a motor with a manual operation function for a welding apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a servo motor main body. A stator winding 3 fixed to the shell 2, a rotor magnetic pole 4 disposed on the inner periphery thereof, and a rotor 5 to which the rotor magnetic pole 4 is fixed, the rotor 5 is constituted by a hollow shaft. The bearings 6 and 6 are pivotally supported on the outer shell 2 of the motor body 1. Further, a ball screw shaft 7 positioned at the shaft core portion of the motor body 1 is fixed to the rotor 5 by a power lock means 8.
[0010]
Reference numeral 9 denotes a pressurizing shaft, and a ball nut 11 provided with a screw that meshes with the screw of the ball screw shaft 7 indirectly via the ball 10 inside the rear end side of the pressurizing shaft 9. Is fixed by screwing. The front portion of the pressure shaft 9 can be extended from a case 12 connected to the motor body 1, and a work is pressure welded to the front end portion of a C-type gun. An electrode (not shown) is a connecting member (not shown) for connecting to a gun arm in the case of an X-type gun, and a work mounting table (not shown) or the like is used in a welding jig, for example. Connected. The pressurizing shaft 9 can be reciprocated by the anti-rotation member 13 with respect to the case 12 and cannot be rotated.
[0011]
A ball screw shaft 7 positioned at the shaft core portion of the motor main body 1 fixed to the rotor 5 by the power lock means 8 extends further rearward from the motor main body 1 and is a position detector. 14.
[0012]
A relatively large-diameter gear 15 forming a driven part for torque transmission is attached to the ball screw shaft 7 at the rear of the motor body 1 and in front of the position detector 14. A relatively small-diameter gear 16 that forms a manually operated drive portion that applies rotational torque to the gear 15 of the driven portion is positioned at a position eccentric from the rotation center shaft portion of the motor. The gear 16 is directly meshed. Note that the gear 15 and the gear 16 may be connected to each other via a toothed belt (not shown).
[0013]
The gear 16 of the driving unit is formed with a machining hole 17 that can be manually rotated, and the gear 16 is operated by a handle or the like through a manual operation hole 18. Note that a machining protrusion (not shown) may be formed in the gear 16 instead of the machining hole.
[0014]
In the driving apparatus for a welding apparatus as described above, the pressing shaft 9 is in a state of approaching the motor body 1 in the state shown in the figure. In this state, the tip end of the pressure shaft 9 slightly protrudes from the case 12. In order to move the pressure shaft 9 away from the motor body 1, that is, to make the tip of the pressure shaft 9 protrude more from the case 12, the stator winding of the motor body 1 is moved. For example, when a three-phase current is supplied to the rotor 3, the rotor magnetic pole 4 is excited, the rotor 5 rotates, and the ball screw shaft 7 fixed to the rotor 5 rotates. As the ball screw shaft 7 rotates, the ball nut 11 moves along the ball screw shaft 7, so that the pressure shaft 9 incorporating the ball nut 11 is located away from the motor body 1. The tip of the pressure shaft 9 protrudes more from the case 12 to operate the welding gun and the welding jig. If the current supply is reversed, the pressure shaft 9 approaches the motor body 1 and the amount of protrusion from the case 12 at the tip of the pressure shaft 9 decreases.
[0015]
When the ball nut 11 is fixed to the rotor 5, the ball screw shaft 7 is meshed with the ball nut 11, and the ball screw shaft 7 is reciprocated to apply to the pressure shaft 9. (Not shown), the rotor 5 itself may be extended rearward, and a large-diameter gear 15 that forms the driven part for torque transmission may be attached to the extended part.
[0016]
By the way, when a failure occurs in the operation system of the motor or the welding apparatus, and the reciprocating motion of the pressure shaft 9 becomes impossible, the machining hole 17 or the machining projection formed in the gear 16 of the drive unit. By attaching a manual handle (not shown) to the ball and rotating the ball screw shaft 7 or the rotor 5 via the gears 16 and 15 by rotating the handle, the pressure shaft 9 reciprocates. By this operation, the pressure shaft 9 can be moved to a desired standby position.
[0017]
In general, the position detector 14 positioned on the axial center line of the motor body 1 is provided with electronic components or the like over the entire back surface, so that it is difficult to pass the shaft through the position detector 14. However, in the present invention, the position detector 14 does not penetrate the shaft, and is driven to transmit torque to the rotation center shaft portion of the motor at the rear side of the motor body 1 and behind the position detector 14. Since the manually operated drive unit 16 that forms the portion 15 and applies rotational torque to the driven portion 15 is positioned at a position eccentric from the rotation center shaft portion of the motor, the rotational torque is applied to the driven portion 15. It is easy to install the drive unit 16 for manual operation to provide the above, and the whole fits compactly.
[0018]
In the embodiment shown in FIG. 2, the gear 16 of the driving unit for driving the gear 15 forming the driven unit for torque transmission is retracted during motor operation. That is, the guide shaft 21 that holds and guides the gear 16 is urged by a return spring 22 made of an elastic body to constitute a retracting device. The guide shaft 21 is positioned in a hole 24 formed in the housing 23 of the position detector 14 and is pivotally supported by a bearing 26 of a bearing holding member 25 screwed into the inlet of the hole 24. Reference numeral 27 is a manual knob, and 28 is a dust seal.
[0019]
In this embodiment, in the normal state, the gear 16 is retracted upward in the drawing by the return spring 22 which is a retracting device and does not mesh with the gear 15, and therefore the gear 16 does not rotate during the motor operation.
[0020]
As described above, when the reciprocating movement of the pressurizing shaft 9 becomes impossible, first, the manual knob 27 is pushed against the urging force of the return spring 22 so that the gear 16 and the gear 15 are moved. It becomes a meshing state. Here, when the manual knob 27 is rotated to rotate the gear 16 of the drive unit, the ball screw shaft 7 or the rotor 5 is rotated via the gears 16 and 15 and the pressure shaft 9 is reciprocated. Therefore, the pressure shaft 9 can be moved to a desired standby position by this operation.
[0021]
Thus, since the gear 16 does not rotate during normal motor operation, wasteful energy consumption is reduced.
[0022]
In the embodiment shown in FIGS. 3 and 4, the gear 16 of the driving unit for driving the gear 15 forming the driven unit for torque transmission is moved from the housing 23 of the position detector 14 during motor operation. It was designed to be pulled out. That is, the guide shaft 21 is made slightly larger in diameter than the small-diameter gear 16 so that the guide shaft 21 can pass through the diameter of the hole 24 together with the gear 16. Further, a cut-in rubber cover 31 is arranged at the entrance of the hole 24. When the gear 16 is removed from the motor, the cut-in rubber cover 31 substantially closes the entrance of the hole 24 and enters the dust. Try to prevent.
[0023]
Then, the approximate positional relationship between the motor body 1 and the gears 15 and 16, the guide shaft 21 and the like, and the approximate positions of the motor body 1 and the ball screw shaft 7, the ball nut 11, the pressure shaft 9 and the like. The relationship is as shown in FIG.
[0024]
In this embodiment, normally, the gear 16 is removed from the motor by the manual knob 27 and the gear 16 and the gear 15 are not engaged with each other. Therefore, the gear 15 idles during motor operation. Only.
[0025]
As described above, when the reciprocating motion of the pressure shaft 9 becomes impossible, the gear 16 is first inserted into the hole 24 using the manual knob 27 and the gear 16 is engaged with the gear 15. To. Here, when the manual knob 27 is rotated to rotate the gear 16 of the drive unit, the ball screw shaft 7 or the rotor 5 is rotated via the gears 16 and 15 and the pressure shaft 9 is reciprocated. Therefore, the pressure shaft 9 can be moved to a desired standby position by this operation.
[0026]
In this embodiment as well, since the gear 15 is only idling during normal motor operation, wasteful energy consumption is reduced.
[0027]
In the above embodiment, the description has been given of the case where a servo motor is used as a motor. However, as a motor, for example, a stepping motor, an inverter motor, a reluctance motor, or the like is appropriately used. This motor may be used.
[0028]
【The invention's effect】
In the present invention, a driven part for torque transmission is formed at the rotation center shaft part of the motor at the rear side of the motor body and in front of the position detector, and rotational torque is applied to the driven part. Since the manually operated drive unit is located at a position eccentric from the rotation center shaft of the motor, the manually operated drive unit can be easily installed and the motor with a manually operated function for a compact welding apparatus as a whole. It becomes.
[0029]
When the driven portion is configured with a gear, and the processing hole or processing projection that can be manually rotated is formed in the gear of the driving unit that is connected to the gear directly or via a toothed belt, the configuration is It becomes a motor with a manual operation function for a welding apparatus that is simplified and easy to operate manually.
[0030]
Further, the driven portion is constituted by a gear, the driving portion meshing with the gear is constituted by a gear, and a retracting device made of an elastic body that displaces the position of the gear of the driving portion is provided. When the gear of the driving unit is retracted during the operation, or the driven unit is configured with a gear, the driving unit meshing with the gear is configured with a gear, and the guide shaft is integrated with the gear of the driving unit. If the gear of the drive unit can be removed from the motor during motor operation by the guide shaft, a motor with a manual operation function for a welding apparatus that consumes less wasted energy can be used. Become.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a drive device using a motor with a manual operation function for a welding apparatus according to the present invention.
FIG. 2 is a cross-sectional view of an essential part of another embodiment of a motor with a manual operation function for a welding apparatus according to the present invention.
FIG. 3 is a sectional view of an essential part of still another embodiment of a motor with a manual operation function for a welding apparatus according to the present invention.
4 is a partial longitudinal sectional view of a drive unit using the motor with a manual operation function for the welding apparatus according to the present invention shown in FIG. 3;
[Explanation of symbols]
1 Motor body 9 Pressure shaft 14 Position detector 15 Gear (driven part)
16 gear (drive unit)
17 Processing hole 21 Guide shaft 22 Spring (Retraction device)

Claims (4)

In a motor for a welding apparatus in which the rotation output of the motor is converted into a reciprocating motion of the pressure shaft and a gun arm or a welding jig is operated by the pressure shaft, A manually operated small-diameter gear that forms a driven portion made of a large-diameter gear for torque transmission on the rotation center shaft portion of the motor, in front of the position detector, and applies rotational torque to the driven portion. It said drive unit comprising a motor - is located at a site eccentric from the rotation center shaft of the motor, the welding device for manual operation of the manual operating section of the drive unit, characterized in that formed in the housing of the position detector Motor with function. Wherein the driven unit is constituted by the gear, the gear of the driving part which is a straight Sesse' continue the gears to form a manual rotation operable machining holes or machining projections, said position the manual operation portion of the drive unit 2. The motor with a manual operation function for a welding apparatus according to claim 1, wherein the motor is a hole for manual operation formed in a housing of the detector . The driven unit is configured with a gear, the driving unit meshing with the gear is configured with a gear, and a retracting device made of an elastic body that displaces the position of the gear of the driving unit is disposed in the manual operation unit, 2. The motor with a manual operation function for a welding apparatus according to claim 1, wherein the gear of the drive unit is retracted during motor operation by the apparatus. The driven part is constituted by a gear, the driving part meshing with the gear is constituted by a gear, and a guide shaft is integrally provided in the gear of the driving part, and the guide shaft is pulled out from the manual operation part. 2. The motor with a manual operation function for a welding apparatus according to claim 1, wherein the gear of the drive unit can be detached from the motor during the motor operation.

Images