KR100266469B1 - Wire supply apparatus - Google Patents

Abstract

PURPOSE: A wire feeding device is provided to increase rotational force by rotating each slave gear with two output shafts of a decelerator, to stably feed a wire by accurately transmitting rotational force to the salve gears and to reduce the cost of the decelerator with the reduced number of components. CONSTITUTION: A decelerator is combined with a drive motor through a rotating shaft and a wire feeding device rotates plural wire feeding rollers and pressurizing rollers with power from the decelerator through third planetary gears, driving gears and slave gears. The wire feeding device comprises a sun gear in a rotating shaft of a driving motor in a decelerator case; a first planetary gear engaged with the sun gear with larger diameter than that of the sun gear; a second planetary gear on the first planetary gear with smaller diameter than that of the first planetary gear; and shafts supporting third planetary gears engaged with the first planetary gears between disc frame and the decelerator case. Wire feeding rollers and the driving gears are placed in each shaft end of the third planetary gears.

Description

Wire feeder

The present invention relates to a wire feeding device, and in particular, by reducing the rotational force of one drive motor and outputting it to the two output shafts to rotate at the same time dedicated to the two feed rollers for feeding the wire to improve the feeding efficiency of the wire feeding device The present invention relates to a wire feeding device capable of reducing parts and thus reducing product cost.

In general, when performing carbon dioxide gas welding, the wire serving as the arc consumption electrode is fed at a constant speed from the spool to the torch through a wire feeding device.

This conventional wire feeding device has been disclosed in Korean Utility Model Publication No. 96-36510.

As shown in FIGS. 1A and 1B, a reducer 12 is provided on the front of the drive motor 10 to reduce the rotational speed of the drive motor, and the output shaft 13 is drawn out from the reducer. The drive gear 14 is provided in the. Subsequently, driven gears 15a and 15b are engaged on both sides of the drive gear, and wire feed rollers 16a and 16b are respectively provided on the driven gear coaxial. In addition, pressurizing rollers 17a and 17b for pressing the wires W are closely attached to each feeding roller, and the pressurizing rollers are provided with driven gears 18a and 18b coaxially with feeding rollers 16a and 16b. ) Is engaged with driven gears 15a and 15b for rotating.

This structure reduces the rotational force of the drive motor 10 at a speed suitable for the reducer 12 to feed the wire W, and drives it to the output shaft 13 through the drive gear 14 through the driven gears 15a and 15b. By rotating the feed rollers (16a) and 16b and the pressure rollers (17a) and (17b) by rotating the wire (W) located between the conveying to the torch 19. When conveyed, the wire W is reliably pressed against the feed rollers 16a and 16b by the pressure rollers 17a and 17b so that the wires W are not slipped and are fed at a stable speed.

However, such a conventional wire feeder is configured to rotate two driven gears through a drive gear because the output shaft of the speed reducer that reduces the rotational force of the drive motor is configured as one shaft. This structure requires a lot of load because one output shaft rotates two driven gears. This will have a bad effect on the stable wire feed, such as a slow wire feed time, there is a closed end to increase the deceleration efficiency of the reducer or improve the performance of the drive motor. In particular, such a reducer is an increase in the parts of the reducer, expensive and mostly depend on imports, there is a closure that puts enormous burden on the manufacturer of the wire feeder.

The present invention is an invention for improving the conventional wire feeding device introduced in the Korean Utility Model Publication No. 96-36510, which consists of two output shafts of the reduction gear for decelerating and outputting the rotational force of the drive motor, and is dedicated to each driven gear. It is possible to increase the rotational force as well as to reliably transmit the rotational force to the driven gear so that wire supply can be supplied at a more stable speed, and reduce the burden on the manufacturer or consumer by reducing the price of the reducer due to the reduced parts. The purpose is to provide a wire feeding device that allows.

1a, b is a structural diagram showing the structure of a conventional wire feeding device,

2 is a cross-sectional view showing a power transmission structure of the wire feeding device according to the present invention;

3 is an exploded perspective view of a motor reducer according to the present invention;

4 is a structural diagram of a wire supply unit according to the present invention.

* Explanation of symbols for main parts of the drawings

20: drive motor 21: rotating shaft

30: reducer 31: disc frame

32: sun gear 33: first planetary gear

34: 2nd planetary gear 35: shaft

36a, 36b: 3rd planetary gear 37a, 37b: shaft

38: cases 39a, 39b, 39c: bush

40: wire feed part 41a, 41b: drive gear

42a, 42b: Feed roller 43a, 43b: Driven gear

44a, 44b: Pressure roller 45a, 45b: Bracket

46: fixed lever

The present invention for achieving the above object is connected to the rotary shaft to the front of the drive motor is coupled to the reduction gear to reduce the rotational speed, the drive gear and the driven gear meshed with the drive gear received from the output shaft of the reducer to the front of the reducer In the wire feeder for feeding a wire by rotating a plurality of wire feed rollers and the pressure roller in close contact with the wire feeder, a small diameter sun gear provided at the end of the rotation shaft of the motor in the case of the reducer, and the lower portion of the sun gear A first planetary gear which is installed at and meshes with the sun gear and has a diameter larger than that of the sun gear, a second planetary gear smaller than the first planetary gear on the coaxial axis of the first planetary gear, and both sides of the first planetary gear, respectively. Third planetary gears which are provided to be engaged with the first planetary gears, and extend the shaft ends of the third planetary gears to the outside while supporting the gears. Up to that in the case for rotatably supporting each shaft end of the third planetary gear the driving gear and the wire feeding roller installed respectively characterized.

Hereinafter, the structure of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view showing a power transmission structure of the wire feeding device according to the present invention, Figure 3 is an exploded perspective view of the motor reducer according to the present invention, as shown in the reduction gear 30 in front of the drive motor 20 The wire feeder 40 is provided in front of the speed reducer 30. A disc frame 31 is placed between the drive motor 20 and the reducer 30 so as to separate the drive motor 20 and the reducer 30 to fix the reducer 30 to the drive motor 20. The rotating shaft 21 of the drive motor 20 passes through the center of the disc frame 31 and extends into the reducer 30. The rotating shaft 21 is freely rotated through a bush 39a interposed in the penetrating portion of the disc frame 31. The front of the disc frame 31 is covered with a reducer case 38, the gear reducer is provided therein.

The reduction gear train is configured as follows. The sun gear 32 is integrally formed at the end of the rotation shaft 21 extending in the reducer 30. In the lower part of the sun gear 32, the shaft 35 is freely installed on the disc frame 31 and the reducer case 38 through the bush 39b, and the first planetary body is engaged with the sun gear 32 on the shaft. Gear 33 is installed. At this time, the first planetary gear 33 has a diameter larger than that of the sun gear 32 and thus the first reduction is performed. A second planetary gear 34 having a small diameter is formed on the coaxial 35 of the first planetary gear 33.

In addition, third planetary gears 36a and 36b that are engaged with the second planetary gears 34 are provided on both sides of the second planetary gear 34, respectively. The third planetary gears 36a and 36b have a diameter larger than that of the second planetary gears 34 to achieve secondary deceleration.

The rear ends of the shafts 37a and 37b of the third planetary gears 36a and 36b are supported by the bush 39c on the disc frame 31 so as to be freely rotated, and the tip penetrates the reducer case 38. Extends to the wire feeder 40. At this time, the bush 39d is interposed in the penetrating portion so that the rotation of the shafts 37a and 37b is freely supported.

Feeding rollers 42a and 42b for feeding the drive gears 41a and 41b and the wire W are provided at the ends of each of the extended shafts 37a and 37b. The upper side of each drive gear 41a, 41b is provided with the bracket 45a, 45b which one side is pivotally rotatably rotated, and the drive gear 41a, 41b is attached to this bracket 45a, 45b. Drive gears 43a and 43b which are engaged with each other and transmit power are installed, and pressurized to rotate while pressing the wire W in close contact with the feed rollers 42a and 42b coaxially with the driven gears 43a and 43b. Rollers 44a and 44b are provided. And between the bracket (45a) and the bracket (45b) is provided with a fixing lever 46 for fixing these brackets. By the operation of the fixed lever 46, the driven gears 43a and 43b are engaged with or dropped from the drive gears 41a and 41b.

Looking at the operation of the present invention by this structure as follows.

First, when the driving motor 20 rotates, the sun gear 32 installed at the end of the rotation shaft 21 of the driving motor 20 rotates the first planetary gear 33 and coaxial with the first planetary gear 33. The second planetary gear 34 on the top simultaneously rotates the third planetary gears 36a and 36b on both sides in the same direction. In this power transmission process, the deceleration is performed in multiple stages, and the final deceleration force rotates the drive gears 41a and 41b and the wire feed rollers 42a and 42b through the respective third planetary gears 36a and 36b. The driven gears 43a and 43b meshed with the drive gears 41a and 41b and the pressure rollers 44a and 44b coaxially installed therewith are rotated. By this operation, the wire W is fed to the torch 19.

As described above, the main point of the present invention is to rotate the third planetary gears 36a and 36b formed on both sides by driving gears 41a and 41b integrally formed on the rotation shaft 21 of the driving motor 20. Each of the third planetary gears 36a and 36b is extended to the wire feeder 40 to drive the drive gears 41a and 41b and the wire feed rollers 42a and 42b respectively configured on both sides. As a result, a more stable rotational force can be obtained than a structure in which two driven gears 43a, 43b and feed rollers 42a, 42b are rotated with one drive gear 41a, 41b. There is an advantage to supply.

Then, as in the prior art, the drive gears 41a and 41b are provided on the shaft output from the reduction gear 30, and the driven gears 43a and 43b on both sides are engaged with the drive gears 41a and 41b. The power transmission process is simplified by directly rotating the drive gears 41a and 41b on both sides by constructing a plurality of shafts 37a and 37b outputted from the reducer 30 without complicatedly composing the power transmission process. Therefore, there is an effect that can reduce the unit cost of the product due to the reduction of parts and manufacturing process.

Claims (1)

A reducer 30 coupled to the rotary shaft 21 on the front of the drive motor 20 to reduce the rotational speed is coupled, and the front side of the reducer 30 transmits power from the output shaft of the reducer 30 to the third voice gear ( The plurality of wire feed rollers 42a and 42b and the pressure roller 44a in close contact with each other through the driving gears 41a and 41b and the driven gears 43a and 43b which are received through the 36a and 36b. In the wire feeding device for rotating the wire (44b) to feed the wire (W), the small diameter sun gear 32 provided at the end of the rotation shaft 21 of the drive motor 20 in the reduction gear case 38 And a first planetary gear 33 installed at a lower portion of the sun gear 32 and engaged with the sun gear 32 and having a larger diameter than the sun gear 32, and a coaxial shape of the first planetary gear 33. The second planetary gear 34 smaller than the first planetary gear 33 and the third planetary gear 36a which are provided on both sides of the first planetary gear 33 to engage the first planetary gear 33, respectively. ( The wire feed roller is formed at each end of each of the third planetary gears 36a and 36b by forming the shafts 37a and 37b supporting the discs 36b between the disc frame 31 and the case 38. (42a) (42b) and drive gears (41a) (41b) are provided, respectively.