JP2007075829A - Bearing structure for turnably supporting portable gun - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing structure for turnably supporting a portable gun, which structure can be easily assembled, and does not require a large effort of an operator in turning it, and can be used for a long period by using a precise ball bearing having a small rotational resistance and by easily assembling it in the bearing structure for turnably supporting the portable gun. <P>SOLUTION: The bearing structure for turnably supporting the portable gun is configured as follows. The gun body 2 of the portable gun is supported by a bell support hung on a hanging fitting. The inner race 31 of a ball bearing 3 of the bell support is turnably supported on the outer periphery of the gun body, and the outer race 32 of the ball bearing is brought into close contact with the peripheral surface 42 of the concave hole 41 formed in a gun body-supporting ring 4. Thus, the gun body and the gun body-supporting ring are integrated via the ball bearing so as to relatively turn. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotary support bearing structure for a portable gun in a portable gun in which a gun body is supported by a bell support suspended from a suspension fitting.

  Conventionally, as a rotary support bearing structure for a portable gun in a portable gun supported by a bell support in which the gun body is suspended from a suspension bracket, a ball receiving groove and a gun body support ring shaped on the gun body side are used. A large number of balls are inserted and arranged between the ball receiving groove shaped on the side, and the gun body and the gun body support ring are integrated so as to be rotatable with respect to each other via the balls. (For example, refer to Patent Document 1).

Japanese Examined Patent Publication No. 7-63850

  By the way, in the rotary support bearing structure of the portable gun, it is necessary to reduce the rotational resistance of the bearing as much as possible in order to minimize the burden on the rotation operation of the operator. In addition, it is difficult to shape a high-accuracy receiving groove on the side of the gun body support ring, it is difficult to process, the material hardness of the ball receiving side is also difficult, and many balls are inserted. There is a problem that the work is not easy and the use of the retainer is almost impossible, and as a result, the raceway surface of the ball is easily damaged, the rotation resistance of the ball is large, and it is difficult to withstand long-term use.

  The present invention has been made in view of such problems of the prior art, and the object of the present invention is to use a precision ball bearing with a low rotational resistance of the bearing and to support the rotation of the portable gun. It is an object of the present invention to provide a portable gun rotary support bearing structure that can be easily incorporated into a bearing structure, can be easily assembled, and can withstand long-term use with little burden on the operator during rotation.

  In order to achieve the above object, the rotary support bearing structure for a portable gun according to the present invention has an inner ring of a bell support ball bearing supported on the outer periphery of the gun body, and the outer ring of the ball bearing is attached to the gun body support ring. The gun main body and the gun main body support ring are integrated so as to be rotatable with respect to each other through the ball bearings.

  Further, the outer surface of the inner ring of the ball bearing is locked to the gun body by a plurality of locking members, the outer surface of the ball bearing is covered with a ring-shaped cover plate, and a plurality of portions of the cover plate are covered with the gun body support ring. It is a thing characterized by having stopped to.

  In the rotary support bearing structure for a portable gun according to the present invention, the inner ring of the ball support ball bearing is pivotally supported by the gun body, the outer ring of the ball bearing is brought into close contact with the gun body support ring, and the ball bearing is interposed therebetween. Since the gun body and the gun body support ring are integrated so as to be able to rotate relative to each other, a commercially available ball bearing with high accuracy can be easily and easily assembled into the bearing, making it easy to assemble and burdening the operator during rotation operations. A portable rotary support bearing structure that can withstand long-term use.

  Further, the outer surface of the inner ring of the ball bearing is locked to the gun body by a plurality of locking members, the outer surface of the ball bearing is covered with a ring-shaped cover plate, and a plurality of portions of the cover plate are covered with the gun body support ring. The ball bearing is securely held between the gun body and the gun body support ring so that the bearing accuracy does not go wrong, and the cover plate does not leak grease and can withstand long-term use. It becomes a rotary support bearing structure of a table gun.

  FIGS. 1 to 3 show a rotary support bearing structure for a portable gun suitable for carrying out the present invention. This rotary support bearing structure 1 has a bell support ball bearing on an outer periphery 21 of a gun body 2. 3, and the outer ring 32 of the ball bearing 3 is brought into close contact with the peripheral surface 42 of the recessed hole 41 formed in the gun body support ring 4, and the gun body 2 and the gun body support are supported via the ball bearing 3. The ring 4 and the ring 4 are integrated so as to be rotatable relative to each other.

  In FIG. 1, the X-type portable gun includes a main shaft 7 that pivotally supports a fixed arm 5 and a movable arm 6, and the gun body 2 on the fixed arm 5 side includes both the arms. A transformer 8 for passing a welding current to 5 and 6 and a driving device 9 for swinging the movable arm 6 are attached.

  The posture of the portable gun can be arbitrarily changed by the rotary support bearing structure 1 in which the gun body 2 is suspended by a hanging metal fitting (not shown).

  Referring also to FIGS. 2 and 3, in the rotary support bearing structure 1, the inner ring 31 of the ball support 3 of the bell support is pivotally supported on the reduced diameter cut-off portion 22 of the outer periphery 21 of the gun body 2. The transformer 8 and the drive device 9 are attached to the rear end side of the gun body 2, and the fixed arm 5 is attached to the front end side. The movable arm 6 is pivotally supported with the main shaft 7 provided on the gun body 2 as a fulcrum.

  The gun body support ring 4 has an L-shaped cross section and is formed into a ring, and a connection tool 43 connected to the suspension fitting side is formed on the outer side of the ring. A concave hole 41 is formed in the ring, and the outer ring 32 of the ball bearing 3 is attached to the peripheral surface 42 of the concave hole 41 so as to be in close contact therewith.

  In this way, the inner ring 31 of the ball bearing 3 is pivotally supported by the gun body 2, the outer ring 32 of the ball bearing 3 is brought into close contact with the gun body support ring 4, and the gun body 2 and the gun body support are supported via the ball bearing 3. Since the ring 4 is integrated with each other so as to be able to rotate with each other, a commercially available ball bearing 3 with high accuracy can be easily and easily incorporated into the bearing, and it is easy to assemble. The rotary support bearing structure of a portable gun that can withstand

  In the portable gun rotation support bearing structure described in the first embodiment, the gun body 2 is provided with a locking member 23 for locking the outer surface of the inner ring 31 of the ball bearing 3 to the gun body 2. A plurality of mounting screw holes 24 are formed.

  A ring-shaped cover plate 33 is disposed on the outer surface of the ball bearing 3, and the cover plate 33 is fixed to the gun body support ring 4 at a plurality of locations. For this purpose, the gun body support ring 4 is formed with a plurality of mounting screw holes 44 for fastening the cover plate 33.

  As described above, the outer surface of the inner ring 31 of the ball bearing 3 is locked to the gun body 2 by the plurality of locking members 23, and the outer surface of the ball bearing 3 is covered with the ring-shaped cover plate 33 and the cover plate 33 is covered. When a plurality of locations are fixed to the gun body support ring 4, the ball bearing 3 is securely held between the gun body 2 and the gun body support ring 4, and the accuracy of the bearing 3 is not distorted. The rotary support bearing structure 1 of a portable gun that can withstand long-term use with little grease leakage.

FIG. 1 is a schematic configuration explanatory view of an X-type portable gun provided with a rotary support bearing structure according to the present invention. FIG. 2 is a front view of the rotary support bearing structure according to the present invention. FIG. 3 includes a partially enlarged view of the AA cross section of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotation support bearing structure 2 Gun body 3 Ball bearing 4 Gun body support ring 21 Outer periphery of gun body 23 Locking member 24 Screw hole 31 Inner ring of ball bearing 32 Outer ring of ball bearing 33 Cover plate 41 Recessed hole 42 Recessed hole peripheral surface 44 Screw hole

Claims (2)

  In a portable gun supported by a bell support in which the gun body is suspended by a suspension bracket, the inner ring of the ball support ball bearing is pivotally supported on the outer periphery of the gun body, and the outer ring of the ball bearing is supported by the gun body support ring. A rotary support bearing structure for a portable gun, wherein the gun body and the gun body support ring are integrated so as to be rotatable with each other through the ball bearing. The outer surface of the inner ring of the ball bearing is locked to the gun body by a plurality of locking members, the outer surface of the ball bearing is covered with a ring-shaped cover plate, and a plurality of portions of the cover plate are fixed to the gun body support ring. 2. The rotary support bearing structure for a portable gun according to claim 1, wherein the rotary support bearing structure is worn.

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