JPS63216604A - Tool chuck - Google Patents

Abstract

PURPOSE:To increase the tool holding force of jaws through the rotation of a handle by providing an inserting hole for a chuck handle shaft part on a chuck body and providing a bevel gear type part which can be meshed with the bevel gear of said chuck handle on a rotating nut. CONSTITUTION:A tool C is interposedly held by jaws 2 which are spread and contracted and made obliquely slide by the rotation of a rotating nut 3 and, further, the tool C is clamped by the rotation of a clamping nut 8. An installing hole 16 is formed on a chuck body 1 and a bevel gear type part 5 is provided on the rotating nut 3. And, a shaft part 18 which can be fitted into the installing hole 16 is formed on the end of a chuck handle 17 while a bevel gear type part 19 to be meshed with the bevel gear type part 5 of the rotating nut 3 is also provided. Accordingly, the nut 3 can be rotated by rotating the handle 17, to obtain a large holding force of the jaws 2 while also facilitating the removal of the tool.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a chuck for tools such as drills.

[Conventional technology]

Conventionally, the chuck for this type of tool was
Publication No. 7, Japanese Utility Model Publication No. 39-32120, etc. are known.

FIG. 4 shows a conventional structure, in which three jaws 52 are provided on the chuck body 51 in a radial manner and can be slid in an inclined manner for expansion and contraction. The nut 53 is rotatably provided, and a shape retaining ring M for retaining the shape of the rotary nut 53 is attached to the rotary nut 53 by a screw 55.
Fix the male screw of the rotating nut 53 with the jaw 52.
is screwed into the male screw 57 on the outer periphery of the chuck body 51.
Screw the female thread (end) of the tightening nut 59 onto the male thread of the
The retaining ring 61 of the tightening nut 59 is screwed onto the chuck body 51, and a bearing body shaft is provided between the shape retaining ring and the tightening nut 59.

When the tip of the chuck main body 51 is gripped and the shape retaining ring is rotated four times in forward and reverse directions, the jaw 52 expands and contracts by sliding in an inclined manner due to the screwing action between the rotating nut 53 and the jaw 52. Sliding forward, with the tool C being held between the tool C by ')-1-52, grip the tip of the chuck body 51 and tighten the tightening nut 5.
9, the tightening nut 59 presses the rotating nut 53 forward through the bearing body axis and shape retaining ring diagram, and the rotating nut 53 rises to the existence of the gap R between the rotating nut 53 and the chuck body 51. is pressed and slid forward, and the jaw 52 is also pressed and slid, so that the tool C is clamped by the jaw 52.

[Problem that the invention attempts to solve]

However, in the case of the above-mentioned conventional structure, when the size of the knee tool is large, etc., the above-mentioned hand-cranking structure using direct grasping alone has a disadvantage in that the holding ability of the tool is low and the tool may be difficult to pull out.

[Means for solving problems]

The purpose of the present invention is to eliminate these inconveniences.The gist of the invention is to provide a plurality of jaws on the chuck body, and to expand and contract the jaws by screwing them together by rotating a rotating nut. The chuck handle has a bevel gear-shaped portion on the chuck body, and the chuck handle is provided so that the rotary nut can be pressed and slid by the rotation of the tightening nut, and the tool can be clamped by the jaws. The chuck for a tool is characterized in that a mounting hole is formed into which the tip shaft portion can be inserted, and the rotating nut is provided with a bevel tooth-shaped portion that can mesh with the bevel gear-shaped portion.

[Effect]

The tool tightening and holding action is achieved by the rotating nut and the tightening nut, and when the shaft of the chuck handle is inserted into the mounting hole of the chuck body and the chuck handle is rotated, the bevel gear-shaped part and the bevel tooth-shaped part engage. This causes the rotating nut to rotate.

〔Example〕

1 to 3 show an embodiment of the present invention. Reference numeral 1 denotes a chuck body, and the chuck body 1 is provided with three jaws 2 in a radial manner so as to be able to expand and contract incline. Similar to the conventional structure, the rotating nut 3 is rotatably divided for assembly after manufacture, and the shape-retaining ring 4 that retains the shape of the rotating nut 3 is fitted onto the outer peripheral surface of the rotating nut 3. The movable nut 3 is provided with a bevel tooth-shaped portion 5, and the female screw 6 of the rotary nut 3 is screwed into the male screw 7 of the outer peripheral portion of the jaw 2.

Reference numeral 8 denotes a tightening nut, in which a female thread 9 of the tightening nut 8 is screwed onto a male thread 10 of the chuck body 1, and a plurality of recesses 11 are formed in the outer peripheral surface of the tightening nut 8.

The hill is a gripping ring, which is fixed to the chuck body 1 so as not to rotate, and has a recess 13 formed on its outer circumferential surface.

Reference numeral 14 denotes a bearing body, in which a hard thrust ring is brought into contact with the rotating nut 3 and the tightening nut 8, and the spherical bearing body 14 is interposed between the thrust rings 15.

A mounting hole 16 is formed on the outer periphery of the chuck body 1.

17 is a chuck handle, and chuck handle 1
A shaft part 7 that can be fitted into the mounting hole 16 is formed at the tip, and a bevel gear part 19 that can be engaged with the bevel tooth part 5 is provided in the middle part, and a handle is provided at the base part. A shaft portion is provided.

Since this embodiment has the above-mentioned configuration, when the grip ring n is rotated in the forward and reverse directions, the jaw 2 is expanded and contracted by the screwing action of the rotation nut 3 and the jaw 3-2, and the jaw 2 is slid forward. Move, Joe 2
When the user rotates the tightening nut 8 while holding the grip ring n while holding the tool C, the tightening nut 8 presses the rotating nut 3 forward via the bearing body 14, and the rotating nut 3 Due to the existence of the gap R between the chuck body 1 and the chuck body 1, the rotary nut 3 is pressed and slid forward, and the jaw 2 is also pressed and slid, so that the tool C can be clamped by the lever I-2.

Further, the tool C can be removed by rotating the tightening nut 8 in the reverse direction and rotating the rotating nut 3 in the reverse direction.

In addition, the rotating nut 3 can be rotated by fitting the shaft portion of the chuck handle 17 into the mounting hole 16, engaging the bevel gear portion 19 and the bevel tooth portion 5, and rotating the handle shaft portion. A large holding force of the jaw 2 can be obtained, and the tool C can be easily removed.

[Effect of idea]

As described above, the present invention is capable of clamping and holding a tool by rotating the rotary nut and the tightening nut, and also fits the shaft of the chuck handle into the mounting hole and engages the bevel gear-like part and the bevel tooth-like part. By rotating the handle shaft, the rotating nut can be rotated, a large jaw holding force can be obtained, and the tool can be easily removed.

As described above, the intended purpose can be fully achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall sectional view, FIG. 2 is a partial sectional view, FIG. 3 is an enlarged sectional view, and FIG. 4 is a sectional view of a conventional structure. . C...Tool, 1...Chuck body, 2...Jaw, 3...
・Rotating nut, 5... Bevel tooth-like part, 8... Tightening nut, 1
6. Mounting hole, 17. Chuck handle, 19. Bevel gear shaped part. June 25, 1986

Claims (1)

[Claims] A plurality of jaws are provided on the chuck body, and the jaws are slidably expanded and contracted by mutual screwing action by rotation of a rotating nut,
and the rotating nut is slidably pressed by the rotation of the tightening nut, and the jaw is provided to be able to clamp the tool, and the chuck handle has a bevel gear-shaped portion on the chuck body, and the tip shaft portion of the chuck handle. 1. A chuck for a tool, characterized in that a mounting hole is formed into which the rotary nut can be inserted, and a bevel tooth-like part that can mesh with the bevel gear-like part is provided on the rotary nut.