JPH04112713U - chuck for tools - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a chuck for a tool that allows a worker to directly rotate a rotary nut by hand without using a handle, in line with the recent increase in speed of work. [Structure] A tool chuck in which a chuck body is provided with a plurality of jaws, and the jaws are capable of expanding and contracting inclination sliding by mutual screwing action by rotation of a rotary nut, wherein the chuck body and the rotary nut are connected to each other. A tool chuck characterized in that a bearing is provided between the parts to receive the tool clamping reaction force.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a chuck for tools such as drills.

0002

[Conventional technology]

Conventional chucks for this type of tools include Japanese Patent Publication No. 55-25002 and Japanese Utility Model Publication No. 6 0-36105 and the like are known.

0003 This conventional structure has a plurality of jaws on the chuck body, and the jaws are connected to a rotating nut. It is constructed so that it can be expanded and contracted and slid at an incline by the rotation of the two and screwed into each other.

0004

[Problem that the idea aims to solve]

However, in the case of the above conventional structure, the rotation of the rotation nut can be attached to and removed from the chuck body. This is done using a handle with a bevel gear structure. There is a need for a device in which the turning nut can be turned directly by the operator's hand without using the turning nut.

[0005]

[Means to solve the problem]

The gist of the present invention will be explained with reference to the accompanying drawings.

[0006] A plurality of jaws 2 are provided on the chuck body 1, and the jaws 2 are rotated by a rotating nut 3. The above-mentioned tool chuck is capable of expanding and contracting inclination sliding by mutual screwing action. A bearing 11 that receives a tool pressing reaction force between the chuck body 1 and the rotating nut 2 The present invention relates to a tool chuck characterized in that it is configured by providing the following.

[0007]

[Effect]

By rotating the rotary nut 3, the jaw 2 is tilted and reduced, and the tool is moved by the jaw 2. When clamping, the bearing 11 receives a tool clamping reaction force.

[0008]

【Example】

1 to 6 show embodiments of the present invention, FIGS. 1 to 3 are the first embodiment, and FIG. 4 is the first embodiment. Embodiment 2, FIG. 5 shows the third embodiment, and FIG. 6 shows the fourth embodiment.

[0009] In the first embodiment shown in FIGS. 1 to 3, reference numeral 1 denotes a chuck body; Three jaws 2 are provided on the chuck body 1 in a radial manner so that they can expand and contract incline. Similar to the conventional structure described above, the body 1 is rotated by dividing into two parts at the V-shaped part 3a for assembly after manufacturing. The nut 3 is rotatably provided, and a shape retaining ring 4 for retaining the shape of the rotary nut 3 is attached to the rotary nut 3. Fit onto the outer circumferential surface, and screw the female thread 5 of the rotation nut 3 into the male thread 6 on the outer circumference of the jaw 2. At the same time, the rotary nut 3 is press-fitted into the resin operation tube 7, and the outer peripheral surface of the operation tube 7 is fixed. A plurality of recesses 8 are provided in the chuck body 1, and a grip ring 9 is fixed to the rear part of the chuck body 1 so as not to rotate. A recess 10 is formed in the outer peripheral surface of the grip ring 9.

0010 Reference numeral 11 denotes a bearing, which has a semicircular arc-shaped inner concave ring on the front outer peripheral surface of the chuck body 1. A groove 12 is provided around the circumference, and a semicircular arc-shaped outer concave ring groove 13 is also formed on the inner peripheral surface of the front part of the rotary nut 3. , and an insertion hole 14 penetrating into the outer concave annular groove 13 is formed on the outer peripheral surface of the rotation nut 3, and a steel ball A plurality of shaped bearings 11 are sequentially inserted through the insertion holes 14 to connect the outer concave ring groove 13 and the inner A detachment prevention piece 15 is press-fitted into the insertion hole 14, and is placed between the concave annular groove 12 and the insertion hole 14.

[0011] Since this first embodiment has the above-mentioned configuration, when the grip ring 9 is gripped and the operation barrel 7 is rotated, Rotating nut 3 rotates, and jaw 2 contracts due to the screwing action between rotating nut 3 and jaw 2. The tool C can be slid forward and inclined, and the tool C can be clamped by the jaws 2.

0012 Also, if you grip the grip ring 9 and rotate the rotating nut 3 in the opposite direction, the rotating nut 3 and jaw 2 will be separated. Due to the screwing action of the jaw 2, the jaw 2 expands and slides backward and forward, allowing the tool C to be removed.

[0013] In this case, the bearing 11 is installed between the chuck body 1 and the rotating nut 3. This makes it possible to smoothly rotate the rotary nut 3, and in particular, to clamp the tool C using the jaw 2. When the bearing 11 receives the reaction force of the tool clamping, the tool clamping rotation can be made smoother. Therefore, the rotary nut 3 can be easily rotated by a working vehicle, and work efficiency can be improved.

[0014] In addition, in this case, the bearing 11 is connected to the inner concave annular groove 12 on the outer peripheral surface of the chuck body 1 and the rotation nut. Since it is provided between the outer concave annular groove 13 on the inner peripheral surface of the cutter 3, the tool pressure is When the rotation nut 3 is pressed in the direction of the arrow through the jaw 2 due to the tightening reaction force, two positions are pressed. The angular bearing receives force in both the axial and circumferential directions at the contact point P. It can be worn like a ring.

[0015] The second embodiment shown in FIG. A detachment prevention portion 16 is formed, and the shape retaining ring 4 of the first embodiment is formed to extend rearward, and the shape retaining ring 4 is formed to extend backwardly. The cylindrical portion 17 of 4 can be supported on the outer peripheral surface of the chuck body 1 in the middle. Ru.

[0016] The third embodiment shown in FIG. A shaped portion 18 is formed.

[0017] The second and third embodiments also obtain the same effects as the first embodiment.

[0018] The fourth embodiment shown in FIG. 6 shows another example of the arrangement position of the bearing 11, in which The seat plate 20 is located on the rotation nut 3 side of the flange portion 19 of the jack body 1, and rotates with the seat plate 20. A bearing 11 is interposed between the nut 3 and the nut 3.

[0019] This fourth embodiment also provides the same effects as the first embodiment.

[0020] Also, instead of the shape-retaining ring in the fourth embodiment, a shape-retaining portion 18 is formed as in the third embodiment. It's okay.

[0021]

[Effect of the idea]

As mentioned above, in this invention, the bearing is installed between the chuck body and the rotating nut. This allows for smooth rotation of the rotating nut, especially when tightening the tool using the jaws. When the tool is pressed, the bearing receives the reaction force, allowing for smooth rotation of the tool. , the rotary nut can be easily rotated by the operator, improving work efficiency.

[0022] As described above, the intended purpose can be fully achieved. ¨

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a first embodiment.

FIG. 2 is a cross-sectional view of the first embodiment.

FIG. 3 is a partial cross-sectional view of the first embodiment.

FIG. 4 is a partial cross-sectional view of the second embodiment.

FIG. 5 is a partial cross-sectional view of the third embodiment.

FIG. 6 is a partial cross-sectional view of the fourth embodiment.

[Explanation of symbols]

1 Chuck body 2 Joe 3 Rotating nut 4 Bearing

Claims (1)

[Scope of utility model registration request] [Claim 1] A chuck body is provided with a plurality of jaws,
In a tool chuck in which the jaws are capable of expanding and contracting and sliding in an inclined manner by mutual screwing action by rotation of a rotary nut, a bearing is provided between the chuck body and the rotary nut to receive a tool pressing reaction force. A tool chuck characterized by being configured with a