JPS62810Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool driver such as a drill driver or tap driver that grips and rotates a rotary cutting tool such as a drill or tap.

As shown in Figure 1, the conventional drill driver has a cylindrical shank insertion hole 1 into which the straight shank of the drill is inserted at one end, and a straight shank attached to the back of the shank insertion hole 1 following the shank insertion hole. A tang hole 2 into which the tang fits is provided, and this tang hole 2 passes through the driver in a direction perpendicular to its axis, and when a drill 3 is inserted as shown in FIG. A wall surface 6 was provided, which was fitted into the socket hole 2 and received torque, and against which the end surface 5 of the tongue came into contact and received a thrust load. In this way, in order to receive both the thrust load and torque of the drill, the drill hole 2 has a rectangular elongated hole shape with a wall surface 6 perpendicular to the axis. However, in order to form a slotted hole in the shape of a rectangular elongated hole, it must be manufactured using a slotter or the like, which is difficult to process, takes a long time, and requires a large amount of processing cost.

This invention solves these conventional problems.The kotsuta hole is made into a round oblong hole instead of a square one, so that the kotsuta hole only receives torque, and the pin is driven deep into the shank insertion hole. This invention relates to a tool driver in which the end surface of the pin projects into the socket hole and comes into contact with the tongue to receive a thrust load.

Next, an embodiment of this invention will be described with reference to the drawings. A cylindrical tool shank insertion hole 11 into which a straight shank of a tool is inserted is bored in the end face of the tool driver 10.
1, an elongated round hole 12 is bored through the tool driver 10 in a direction perpendicular to the axis. Further, a pin 13 is driven into the tool driver on an extension of the tool shank insertion hole 11, and an end surface 14 of the pin 13 projects into the screw hole 12. 15 is a cut. The end surface 14 of this pin 13 protrudes to a position where it comes into contact with the end surface 18 of the tip of the tongue 17 when the tool shank 16 is inserted into the tool shank insertion hole 11.

As described above, in the present invention, the slotted hole 12 is in the shape of a round oblong hole, and is designed to fit into both flat surfaces 19 of the tongue 17 and receive only the torque, so that the thrust load from the tongue 17 is received by the pin 13. Therefore, the function as a tool driver is the same as the conventional one. However, since the slotted hole 14 has a round elongated hole shape, it can be formed by end milling, so slotting is not required as in the conventional method, and the processing is easy, the processing time is short, and the manufacturing cost is low. Also, unlike slotting, there is no need to make special tools, so there is an advantage that tool costs can be reduced.

In addition, although the drill driver was explained in the embodiment, the description is omitted since the same applies to the tap driver.

[Brief explanation of the drawing]

Fig. 1 shows a conventional drill driver, A is a front view, B is a plan view, Fig. 2 is a partially cutaway front view showing a state in which a drill is attached to a conventional drill driver, and Fig. 3 is a main body. The drill driver of the present invention is shown in which A is a front view, B is a plan view, and FIG. 4 is a partially cutaway front view showing a state in which a drill is attached to the drill driver of the present invention. 10... Tool driver, 11... Tool shank insertion hole, 12... Kotsuta hole, 13... Pin, 14
...End face of pin, 16...Shank, 17...Tang, 18...Tang end face.

Claims (1)

[Scope of utility model registration request] A tool driver with a cylindrical tool shank insertion hole into which the straight shank of a rotary cutting tool is inserted and a kotsuta hole into which the tool shank tongue fits continuously at the back of the tool shank insertion hole. It has a round elongated hole shape that penetrates in the right angle direction,
A tool driver in which the end face of a pin driven deep into the tool shank insertion hole protrudes into the socket hole so that it can come into contact with the tang end face.