KR200479508Y1 - Lifting unit for stud welder - Google Patents

Abstract

The present invention relates to a lifting unit for a stud welding machine,
housing;
A clutch module movably disposed inside the housing; And
And a drive module for causing the clutch module to move forward and backward,
The clutch module
A barrel having first and second air injection portions formed through the front and rear portions of the outer circumferential surface, respectively;
A front cover coupled to a front end of the barrel and having an annular first slide portion protruding from a rear center;
A rear cover having an annular second sliding part coupled to a rear end of the barrel and protruding from the center of the front side and an insertion part tapered rearward inside the second sliding part;
The front and rear portions of the inner circumferential surface are in contact with the first and second sliding portions so as to be able to advance and retreat, respectively, and the outer circumferential surface is in contact with the inner circumferential surface of the barrel so as to be able to advance and retreat, A piston reciprocally operated by the compressed air supplied into the barrel through the valve;
A connecting bar inserted through the front cover and the rear cover and having a front end coupled to the gun body of the stud welder; And
And a collet that is fixed to the piston and presses and fixes the outer circumferential surface of the connecting bar as the piston enters the insertion portion of the rear cover when the piston is retracted.
In the lifting unit for a stud welding machine according to the present invention, the collet of the clutch module retracts together with the piston, thereby fixing the connecting bar coupled to the key body, thereby more securely fixing the key body, And the durability is improved by having a more rigid structure.

Description

Lifting unit for a stud welder {LIFTING UNIT FOR STUD WELDER}

The present invention relates to a lifting unit for a stud welding machine, and more particularly, to a stud lifting unit for contacting a stud held by a welding machine during a welding of a stud to a base material, separating the stud from the base material to generate an arc required for welding, To a lifting unit for a stud welder.

A technique related to a lifting unit for a stud welding machine is disclosed in Korean Patent Registration No. 10-0729082 (hereinafter referred to as "Prior Art", "Lifting Module of Stud Welding Gun").

The prior art

A case having a hollow cylindrical shape and having an inward flange formed in the hollow,

A first cap having a through hole formed in the axial direction and fixed to one end of the case,

A second cap having a through hole formed in the axial direction and fixed to the other end of the case,

A clutch ring arranged in a ring shape and communicating with a through hole of the second cap, the clutch ring being fixed to an outer surface of the second cap and having a plurality of holes in a radial direction;

A clutch pin slidably inserted through the clutch ring, the second cap and the first cap, the end inserted into the clutch ring being tapered,

A plurality of clutch balls respectively inserted in a plurality of holes of the clutch ring and radially moved by tapers of the clutch pins,

A flange fixed to the clutch pin and disposed between the inward flange of the case and the second cap,

A fixing cap coupled to the outside of the first cap and blocking a through hole of the first cap,

An elastic member elastically supporting the end of the fixed stopper and the clutch pin so as to be spaced apart from each other,

And a solenoid disposed between the stationary cap and the inward flange of the case "

When the stud is brought into contact with the base material in a state where the pushing rod of the gun body can not reach the bottom dead center, a space is provided in which the gun body can be slid by the driving force of the pushing rod, The gun body can be fixed at a time point when the slide of the gun body is completed.

The prior art allows the stud body to be welded to a base material having bending or protrusion by allowing the gun body of the welding gun to be fixed at an arbitrary position,

There is a problem in that the contact portions between the clutch balls and the respective clutch balls are easily worn or damaged and the durability is deteriorated when the gun body is fixed by a plurality of clutch balls.

In addition, the prior art has a disadvantage in that stability is poor when the key body is fixed as each clutch ball is arranged on one circumference. That is, there is a problem that the gun body is not firmly fixed and tilts easily.

The present invention has been made to solve the above problems,

And it is an object of the present invention to provide a lifting unit for a stud welder which can fix a gun body of a stud welder more stably and has improved durability.

According to an aspect of the present invention, there is provided a lifting unit for a stud welding machine,

housing;

A clutch module movably disposed inside the housing; And

And a drive module for causing the clutch module to move forward and backward,

The clutch module

A barrel having first and second air injection portions formed through the front and rear portions of the outer circumferential surface, respectively;

A front cover coupled to a front end of the barrel and having an annular first slide portion protruding from a rear center;

A rear cover having an annular second sliding part coupled to a rear end of the barrel and protruding from the center of the front side and an insertion part tapered rearward inside the second sliding part;

The front and rear portions of the inner circumferential surface are in contact with the first and second sliding portions so as to be able to advance and retreat, respectively, and the outer circumferential surface is in contact with the inner circumferential surface of the barrel so as to be able to advance and retreat, A piston reciprocally operated by the compressed air supplied into the barrel through the valve;

A connecting bar inserted through the front cover and the rear cover and having a front end coupled to the gun body of the stud welder; And

And a collet that is fixed to the piston and presses and fixes the outer circumferential surface of the connecting bar as the piston enters the insertion portion of the rear cover when the piston is retracted.

In the lifting unit for a stud welding machine according to the present invention,

The collet of the clutch module retracts together with the piston, thereby fixing the connecting bar coupled to the key body, whereby the key body can be more stably fixed, and furthermore, the structure is more robust against wear and impact, .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a use state of a lifting unit for a stud welding machine according to an embodiment of the present invention; FIG.
Fig. 2 is a sectional structural view of a lifting unit for a stud welding machine according to an embodiment of the present invention; Fig.
3 is an exploded perspective view of the clutch module shown in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which the left and right sides are designated as the front and the rear, respectively.

As shown in FIGS. 1 to 3, the lifting unit 11 for a stud welding machine according to an embodiment of the present invention includes a housing 100, a clutch module 200, and a drive module 300.

1, the lifting unit 11 of the present invention includes a gun base 12, a casing 13 fixed by the gun base 12, a gun body 13 installed inside the casing 13, An adapter 15 provided at the front end of the gun body 14 to grip the stud 20 and a stud feeder 16 for feeding the stud 20 to the adapter 15 Is installed in the stud welder (10).

The lifting unit 11 is provided at the rear of the gun body 14 to advance the gun body 14 so that the stud 20 held by the adapter 15 contacts the base material. The stud 20 is spaced apart from the base material so that an arc is generated between the base material and the stud 20 during welding.

Hereinafter, with respect to each configuration of the lifting unit 11,

The housing 100 includes a front housing 110 surrounding the clutch module 200 and a rear housing 120 surrounding the solenoid 310 of the driving module 300, .

The front housing 110 and the rear housing 120 are respectively formed in a cylindrical shape and are coupled to each other in a line. The front housing part 110 and the rear housing part 120 have annular shapes, which protrude inwardly to limit the forward / backward movement range of the clutch module 200, (111, 121) are formed.

The clutch module 200 is installed in the housing 100 so as to be movable forward and backward,

As shown in FIG. 2 and FIG. 3,

A barrel 210 having first and second air injection portions 211 and 212 formed through the front and rear portions of the outer circumferential surface, respectively;

A front cover 220 coupled to a front end of the barrel 210 and having an annular first slide 221 protruding from the rear center;

An annular second sliding portion 231 coupled to the rear end of the barrel 210 and protruding from the center of the front portion of the barrel 210 and an insertion portion tapered to be narrowed rearwardly inside the second sliding portion 231 232;

The front and rear portions of the inner circumferential surface are in contact with the first and second sliding portions 221 and 231 so that the outer circumferential surface is in contact with the inner circumferential surface of the barrel 210 so as to be able to advance and retreat, A piston 240 that is operated to move back and forth by the compressed air supplied into the barrel 210 through the first and second air injection units 211 and 212;

A connecting bar 250 inserted through the front cover 220 and the rear cover 230 and having a front end coupled to the gun body 14 of the stud welder; And

A collet 260 fixed to the piston 240 and adapted to press and fix the outer circumferential surface of the connecting bar 250 as the piston 240 enters the insertion portion 232 of the rear cover 230 when the piston 240 retracts; .

The barrel 210 has a cylindrical shape and is inserted into an inner peripheral surface of the front housing 110.

A pneumatic fitting 280 is attached to each of the first and second air injection units 211 and 212 and a hose connected to a separate air compressor is attached to each fitting 280, Compressed air is supplied to the inside.

The front cover 220 and the rear cover 230 are respectively screwed to the front end and the rear end of the barrel 210 and have a central opening so that the connecting bar 250 can pass therethrough.

An annular protrusion 233 is formed on the rear surface of the rear cover 230 so as to enter the solenoid 310 of the driving module 300 through the rear housing 120. An inner side of the protrusion 233 A bushing 290 to which the connecting bar 250 is to be wrapped is inserted.

The piston 240 has a cylindrical shape and is inserted between the outer circumferential surface of the first and second sliding portions 221 and 231 and the inner circumferential surface of the cylinder 210. The front end of the piston 240 and the front cover 220, 212 between the rear end of the piston 240 and the rear cover 230 so that compressed air for advancing and retreating the piston 240 can be filled in the space between the first and second air injection units 211, The space S is formed.

A packing 243 for securing the airtightness between the first and second sliding portions 221 and 231 and the inner circumferential surface of the barrel 210 is fitted to the front end portion and the rear end portion and the outer circumferential surface of the inner circumferential surface of the piston 240 .

The connecting bar 250 has an elongated bar shape and a flange 251 is formed at the front end of the connecting bar 250 for engaging with the gun body 14 of the stud welder.

The collet 260 is fitted on the outer side of the connecting bar 250 and has an outer peripheral surface of a generally frusto-conical shape and a rear portion is inserted into the insertion portion 232 of the rear cover 230.

The collet 260 has a plurality of slits 262 formed along the outer circumferential surface thereof so as to be opened or narrowed inward.

And so that the collet 260 can be fixed to the piston 240,

The collet 260 is formed with an insertion groove 261 which is recessed along the periphery,

The insertion groove 261 is fitted with the fixing ring 270 so that the outer edge thereof protrudes along the outer circumferential surface of the collet 260,

The piston 240 includes a body 241 and a cap 242 which are coupled to each other with a fixed ring 270 interposed therebetween.

Here, the fixing ring 270 is preferably divided into two or more powder pieces as shown in FIG. 3 so that the fixing ring 270 can be easily inserted into the insertion groove 261.

The body 241 of the piston 240 has its outer circumferential surface in contact with the inner circumferential surface of the barrel 210 and the inner circumferential surface front end of the body 240 in contact with the first sliding portion 221 of the front cover 220. The body 241 is formed with a locking portion 241a protruding along the inner circumferential surface so that the front face of the locking ring 270 protruding outside the collet 260 is hooked and fixed.

The cap 242 is coupled to the rear end of the body 241 so as to press and fix the rear surface of the fixing ring 270 protruding from the collet 260.

The piston 240 is retracted by the compressed air supplied into the barrel 210 through the first air injection unit 211 so that the collet 260 is inserted into the insertion portion 232 of the rear cover 230 So that the connecting bar 250 is pressed and fixed.

That is, the clutch module 200 intermittently interrupts the connection between the gun body 14 and the lifting unit 11 by the collet 260 catching or releasing the connecting bar 250 by the operation of the piston 240 do.

According to the clutch module 200 of the present invention configured as described above, the collet 260 retreats together with the piston 240 to fix the connecting bar 250 coupled to the key body 14 The lifting unit 11 can more firmly fix the gun body 140 and has a more rigid structure against wear and impact, thereby improving the durability of the lifting unit 11. [

The driving module 300 moves the clutch module 200 forward and backward,

As shown in FIG. 2,

A solenoid 310 disposed behind the clutch module 200; And

And a compression spring 320 fitted in the connecting bar 250 to be interposed between the housing 100 and the flange 251 of the connecting bar 250.

The solenoid 310 is inserted into the rear housing 120. When the power is supplied, the solenoid 310 forms a magnetic field to move the clutch module 200 backward.

When the supply of power to the solenoid 310 is interrupted, the compression spring 320 causes the retracted clutch module 200 to move forward again.

The compression spring 320 is also configured to move the connecting bar 250 and the gun body 14 forward by the collet 260 in a state in which the connecting bar 250 is not pressed, (20) to contact the base material.

While the present invention has been described with reference to the accompanying drawings, it should be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims. And should be construed as falling within the scope of protection of the present invention.

100; housing
110; Front housing
111; Jaw
120; Rear housing
121; Jaw
200; Clutch module
210; Barrel
211; The first air-
212; The second air-
220; Front cover
221; The first sliding portion
230; Rear cover
231; The second sliding portion
232; The insertion portion
233; projection part
240; piston
241; body
242; cap
243; packing
250; Connecting bar
251; flange
260; Collet
261; Insert groove
262; Slit
270; Fixed ring
280; fitting
290; bushing
300; Drive module
310; Solenoid
320; Compression spring

Claims (3)

A housing (100);
A clutch module (200) installed on the inside of the housing (100) so as to be movable forward and backward; And
And a drive module (300) for moving the clutch module (200) forward and backward,
The clutch module (200)
A barrel 210 having first and second air injection portions 211 and 212 formed through the front and rear portions of the outer circumferential surface, respectively;
A front cover 220 coupled to a front end of the barrel 210 and having a first annular first slide 221 protruding from the rear center;
An annular second sliding portion 231 coupled to the rear end of the barrel 210 and protruding from the center of the front portion of the barrel 210 and an insertion portion 232 formed to be tapered rearward inwardly of the second sliding portion 231 A rear cover 230 having a front cover 230;
The front and rear portions of the inner circumferential surface of the barrel 210 are in contact with the first and second sliding portions 221 and 231 so that the outer circumferential surface of the barrel 210 can advance and retract A piston 240 which is in contact with the barrel 210 and moves back and forth by compressed air supplied into the barrel 210 through the first and second air injection units 211 and 212;
A connecting bar 250 inserted through the front cover 220 and the rear cover 230 and having a front end coupled to the gun body of the stud welder; And
The collet 260 is fixed to the piston 240 and presses and fixes the outer circumferential surface of the connecting bar 250 as the piston 240 enters the insertion portion 232 of the rear cover 230 when the piston 240 retracts. And a plurality of stud-welded lifting units.
The method according to claim 1,
The collet 260 is formed with an insertion groove 261 formed along the periphery thereof,
The insertion groove 261 is fitted with the fixing ring 270 so that the outer edge thereof protrudes along the outer circumferential surface of the collet 260,
The piston (240)
The inner circumferential surface of the barrel 210 and the first sliding portion 221 of the front cover 220 are brought into contact with each other so that the front surface of the fixing ring 270 protruding outside the collet 260 is hooked and fixed. A body 241 having a latching portion 241a protruding along the periphery; And
And a cap (242) coupled to a rear end of the body (241) for pressing and fixing the rear surface of the fixing ring (270) protruding out of the collet (260) unit.
3. The method according to claim 1 or 2,
A flange 251 is formed at the front end of the connecting bar 250,
The drive module (300)
A solenoid 310 installed at the rear of the clutch module 200; And
And a compression spring (320) fitted in the connecting bar (250) to be interposed between the housing (100) and the flange (251).

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