JP3135547U - Power tool for both driver and drill - Google Patents

Abstract

A power tool structure that can be used as a driver or a drill is provided.
A power tool main body, a chuck base, a clutch portion, and a chuck are formed. When performing the drilling operation, the chuck base, the clutch part and the chuck 60 are connected to the front end of the electric power tool main body 70, and one end of the rotating shaft 45 of the chuck base on which the drill bit 61 is set is placed in the hexagonal hole at the front end of the power output shaft 71 Then, the power output shaft 71 is driven by a motor to rotate the rotating shaft 45, and the chuck 60 connected to the front end of the rotating shaft 45 is rotated. When used as a driver, one end of the driver having a hexagonal cross section that fits in the hexagon hole at the front end of the power output shaft 71 is set.
[Selection] Figure 6

Description

The present invention relates to a structure of an electric power tool, and more particularly to a structure of an electric power tool that can be used as an electric screwdriver or an electric drill by a structure in which a chuck portion of the electric power tool can be attached and detached.

The division of specialized processing is subdivided, and the tools used are changed according to the processing. FIG. 1 is a three-dimensional exploded view showing a conventional electric driver. FIG. 2 is a side view showing a conventional electric driver. As shown in the figure, the electric driver main body 10 and the chuck portion 20 are configured, and a motor and necessary members are provided in the electric driver main body 10, and the electric driver main body 10 further includes power for transmitting the power of the motor. A fitting sleeve 12 installed at the front end of the output shaft 11 and the electric driver main body 10 is provided. A hexagonal hole is provided at the front end of the power output shaft 11, and a driver bit 13 adapted to the inner diameter is installed in the hexagonal hole. An annular concave edge 14 is provided on the surface of the fitting sleeve 12. The chuck unit 20 includes a first chuck 21, a second chuck 22, and a third chuck 23, and the first chuck 21, the second chuck 22, and the third chuck 23 are joined in order.
A considerable number of balls 24 are provided on the inner edge of the third chuck 23, and when the chuck portion 20 is fitted into the fitting sleeve 12 at the front end of the electric driver main body 10, an appropriate number of balls on the inner edge of the third chuck 23 is provided. 24 is fitted to the concave edge 14 of the fitting sleeve 12 to complete the assembly. With the above-described structure, when the motor rotates the power output shaft 11, the driver bit 13 fitted to the front end of the power output shaft 11 rotates and the bolts and screws are tightened.

In addition to the electric driver described above, there is an electric driver shown in FIG. The structure is such that a motor and necessary members are provided in the electric driver main body 30, and the electric driver main body 30 is further provided with a power output shaft 31 for transmitting the power of the motor and a screw installed at the front end of the electric driver main body 30. A mating sleeve 32 and a chuck 33 are provided. A hexagonal hole is provided at the front end of the power output shaft 31, and a driver bit 34 matching the inner diameter is inserted into the hexagonal hole. The screwing sleeve 32 can be screwed and fixed to the screwing portion 35 at the front end of the electric driver main body 30, and an annular concave edge 36 is provided on the surface of the screwing sleeve 32, and the chuck 33 is fitted to the concave edge 36. be able to. With the above-described structure, when the motor rotates the power output shaft 31, the driver bit 34 fitted to the front end of the power output shaft 31 rotates and the bolts and screws are tightened.

Dedicated driver bits 13 and 34 are connected to the above-described two types of conventional electric drivers and used for tightening bolts and screws, so that extremely excellent working effects can be achieved. However, only the dedicated driver bits 13 and 34 can be connected to the electric driver described above, and this is not applicable when the user wants to perform a drilling operation. Therefore, it is necessary to prepare an electric drill to perform the drilling operation.

FIG. 4 shows the structure of an electric drill according to the prior art, which is mainly composed of an electric drill main body 37 and a chuck portion 38, and a motor and necessary members are provided inside the electric drill main body 37. Furthermore, a power output shaft 39 for transmitting the power of the motor is provided. A hexagonal hole is provided at the front end of the power output shaft 39, and a drill bit 391 adapted to the inner diameter is inserted into the hexagonal hole. The chuck portion 38 can be connected to the front end of the electric drill main body 37. With the above-described structure, when the motor rotates the power output shaft 39, the drill bit 391 fitted to the front end of the power output shaft 39 rotates to perform a drilling operation.

As can be seen from the use of the electric driver and electric drill described above, specialized processing is subdivided, so there are various specialized tools, and the user needs to prepare various electric tools suitable for the work. This is inconvenient, and costs such as purchase, repair and maintenance are a heavy burden on the user. Further, the driver bit 13 and the drill bit 391 used in the above-described electric driver and electric drill are dedicated special standard products and are different from general driver bits and drill bits. When worn or damaged, the user cannot use the power tool without purchasing the driver bit 13 or the drill bit 391 of the same standard. Therefore, these dedicated power tools are extremely inconvenient in view of the selectivity and usability of the consumables.
Japanese Patent No. 3856040

The first object of the present invention is to solve the disadvantage that there is only one application in a power tool according to the prior art, and a power tool that can be used as a driver or a drill by a structure in which a chuck portion can be attached and detached. To provide a structure.
The second object of the present invention is that when the electric tool is used as a drill, the drill bit can be a cylindrical standard product found in a general drill bit, thereby increasing the selectivity of consumables. It is to provide a tool structure.

In order to solve the above-described object, an electric tool according to the present invention includes an electric tool main body, a chuck base, a clutch unit, and a chuck. A driver bit is connected to the power tool body, and bolts or screws can be tightened or loosened. The chuck base, the clutch unit, and the chuck are connected to the front end of the electric tool body, and one end of the rotating shaft of the chuck base is inserted into the power output shaft of the electric tool body, and the chuck is rotated when the power output shaft rotates. The chuck can hold drill bits of various diameters, and drilling can be performed with the drill bit. As described above, the electric tool according to the present invention can be used as an electric driver or an electric drill.

When a driver bit is combined with the power tool body, bolts and screws can be tightened or loosened. When members such as the chuck base, clutch unit, and chuck are connected to the front end of the power tool body, one end of the chuck base's rotating shaft is inserted into the hexagonal hole at the front end of the power output shaft, and the power output shaft rotates when the motor is driven. Rotate and move the chuck at the front end of the rotating shaft at the same time. The chuck can pinch drill bits of various diameters according to the prior art and can perform drilling operations with the drill bit. Therefore, the electric tool can be used not only as an electric driver but also as an electric drill. In addition, the drill bit of the electric drill can use not only a special hexagonal column standard but also a general cylindrical standard, so the degree of freedom in selecting consumable members can be increased, and the rotation axis of the chuck base is the power output shaft. When receiving the rotational force, one end is connected to the power output shaft and the other end is supported by the bearing, so when the drill bit is connected, not only the rotation is smooth, but also the center is displaced There is no.

Embodiments showing the objects, features, and effects of the present invention will be described in detail with reference to the drawings.

FIG. 5 is a three-dimensional exploded view showing the present invention. FIG. 6 is a partial sectional view showing the present invention. As shown in the figure, the present invention mainly includes members of an electric power tool main body 70, a chuck base 40, a clutch portion 50, and a chuck 60.

The electric tool body 70 is provided with a motor and necessary members. The electric tool body 70 further includes a power output shaft 71 for transmitting the power of the motor and a fitting sleeve 72 installed at the front end of the electric tool body 70. Provided. A hexagonal hole is provided at the front end of the power output shaft 71, and a rod body matching the inner diameter is inserted into the hexagonal hole. An annular concave edge 73 is provided on the surface of the fitting sleeve 72.

An inner cover 41 having a concentric circular section is integrally extended in the chuck base 40, and a hollow portion 42 and a spring accommodating portion 43 surrounding the hollow portion 42 are formed in the chuck base 40. A bearing 44 is fixed inside the hollow portion 42. A rotary shaft 45 is inserted and fixed to the bearing 44 from the front, and one end of the rotary shaft 45 is exposed to the outside of the chuck base 40 to form a pivot connection 46. The other end of the rotating shaft 45 has a hexagonal cross section. A compression spring 47 is installed in the spring accommodating portion 43. An annular convex wall 48 is provided at the rear end of the inner wall surface of the chuck base 40. A considerable number of balls 49 are annularly arranged along the outer periphery of the rear end of the inner wall surface of the inner cover 41.

The clutch part 50 has a hollow cross-sectional convex shape, a convex edge 51 is provided on the outer peripheral edge of the front end, and an annular concave part 52 is formed on the rear end of the inner wall to constitute a housing part for the ball 49. With the above-described structure, the front end of the clutch portion 50 is fitted and inserted into the spring accommodating portion 43 of the chuck base 40, and the convex edge 48 of the clutch portion and the convex wall 48 of the chuck base 40 are opposed to each other in the spring accommodating portion 43. The compression spring 47 is disposed, and the clutch portion 50 is pressed by the compression spring 47 and exerts an elastic force outward.

The chuck 60 is installed at the front end of the electric drill, and can hold the drill bit 61 and can hold the drill bit 61 having a different diameter by rotating the handle portion having a bevel gear shape (the drill bit 61 is held). (Means are based on the prior art and will not be described). The chuck 60 is connected to the pivot connecting portion 46 at one end of the rotating shaft 45 of the chuck base 40 and rotates in response to the rotation of the rotating shaft 45.

When used as a driver, the electric power tool main body 70 according to the present invention is connected to a screwdriver bit (the screwdriver bit is a hexagonal column and inserted into a hexagonal hole provided at the front end of the power output shaft 71). Can be tightened.

When the user performs a drilling operation, members such as the chuck base 40, the clutch unit 50, and the chuck 60 are connected to the front end of the electric power tool main body 70. As shown in FIG. 7, when the front end of the clutch portion 50 is inserted into the spring accommodating portion 43 of the chuck base 40 and the convex edge 51 and the convex wall 48 of the chuck base 40 are engaged with each other, the clutch portion 50 is removed from the spring accommodating portion 43. It can be prevented from falling off. Since the compression spring 47 is provided in the spring accommodating portion 43, the clutch portion 50 is pressed to enter the spring accommodating portion 43, and the annular recessed portion 52 corresponds to a considerable number of balls 49 of the inner cover 41 of the chuck base 40. By doing so, these balls 49 can be expanded outward by the recessed space, and the diameter that can be passed can be increased. Therefore, the fitting sleeve 72 of the electric power tool main body 70 can pass through the ball 49 portion, and when the pressing of the clutch portion 50 is stopped and returned, these balls 49 are pressed against the inner wall of the clutch portion 50. It returns to the state of forming the original small diameter. At this time, these balls 49 are fitted into the annular concave edge 73 of the fitting sleeve 72. Accordingly, by pulling the clutch portion 50, the balls 49 are moved into the recessed portion space and expanded outward, whereby the chuck portion can be attached and detached.

When the chuck portion of the present invention is connected to the fitting sleeve 72 of the electric tool main body 70, one end of the hexagonal shape of the rotating shaft 45 of the chuck base 40 is inserted into the hexagonal hole at the front end of the power output shaft 71, and the power output shaft 71 Rotates the rotating shaft 45 by the driving force of the motor, and rotationally drives the chuck 60 connected to the front end of the rotating shaft 45. The chuck 60 can hold the drill bits 61 of various diameters according to the prior art, and can perform a drilling operation with these various drill bits 61. Therefore, the electric power tool main body 70 of the present invention can be used as an electric drill, and the drill bit can be of a general cylindrical shape, so that the consumable material selectivity is improved.

FIG. 8 is a perspective view showing a screwing sleeve of the present invention. FIG. 9 is a partial cross-sectional view showing a state in which the screwing sleeve of the present invention is used. As shown in the figure, in the present invention, a screwing sleeve 80 can be added. An internal thread 81 is provided inside one end of the screwing sleeve 80 and can be screwed into the screwing part 91 at the front end of the electric power tool 90. An annular concave edge 82 is provided on the surface of the screw sleeve 80, and a considerable number of balls 49 on the inner wall surface of the inner cover 41 are fitted into the annular concave edge 82, and the chuck portion is attached and detached. Therefore, by adding the screwing sleeve 80, the chuck portion of the present invention can be used as an electric tool including the screwing portion 91.

As can be understood from the above description and drawings, the technical means and structure used in the present invention surely achieve the object of the present invention, and the structure of the power tool of the present invention allows the power tool to be used only as an electric driver. It can also be used as an electric drill. The drill bit of the electric drill can use not only a special hexagonal column standard but also a general cylindrical standard, which increases the selectivity of consumables. When the rotating shaft 45 of the chuck base 40 receives the rotational force of the power output shaft 71, one end thereof is connected to the power output shaft 71 and the other end is supported by the bearing 44, so that the drill bit 61 is connected. Sometimes, the rotation is not only smooth, but its center is not displaced. The present invention has high practicality, and the provided mechanism is novel.

It is a three-dimensional exploded view showing an electric driver according to the prior art. It is a side view which shows the electric driver by a prior art. It is a side view which shows another electric driver by a prior art. It is a side view which shows the electric drill by a prior art. It is a three-dimensional exploded view showing the present invention. It is a partial sectional view showing the present invention. It is a partial cross section figure which shows the state which removes the chuck | zipper part of this invention from an electric tool main body. It is a perspective view which shows the screwing sleeve of this invention. It is a partial cross section figure which shows the state which uses the screwing sleeve of this invention.

Explanation of symbols

40 Chuck base 41 Internal cover 42 Hollow portion 43 Spring accommodating portion 44 Bearing 45 Rotating shaft 46 Pivoting connection portion 47 Compression spring 48 Convex wall 49 Ball 50 Clutch portion 51 Annular convex edge 52 Annular recessed portion 60 Chuck 61 Drill bit 70 Electric tool Main body 71 Power output shaft 72 Fitting sleeve 73 Annular concave edge 80 Threaded sleeve 81 Internal thread 82 Annular concave edge 90 Electric tool 91 Threaded part

Claims (2)

It consists of a power tool body, a chuck base, a clutch part and a chuck.
A motor is provided in the electric tool body, and the electric tool body is further provided with a power output shaft for transmitting the power of the motor and a fitting sleeve installed at the front end of the electric tool body, and the power output. A hexagonal hole is provided at the front end of the shaft and an annular concave edge is provided on the outer peripheral surface of the fitting sleeve.
An inner cover having a concentric circular cross section is integrally extended in the chuck table, and a hollow portion in the inner cover and a spring accommodating portion between the inner cover and the outer peripheral wall of the chuck table are formed in the chuck table. A bearing is fixedly disposed inside the hollow portion, and a rotary shaft is inserted and supported from the front of the bearing, and a front end of the rotary shaft is exposed to the front side of the chuck base to form a pivot connection portion. The rear end is formed in a hexagonal shape that fits the hexagonal hole in the front end of the power output shaft, a compression spring is installed in the spring accommodating portion, and an annular convex wall is provided in the inner wall rear end edge of the chuck base. A considerable number of balls are annularly arranged on the inner wall lower edge of the inner cover,
The clutch portion has a hollow cross-sectional convex shape, an annular convex edge is provided on the outer peripheral edge of the front end, and an annular concave portion is formed on the rear end of the inner wall. With these structures, the front end of the clutch portion is the chuck base. When inserted into the spring accommodating portion, the annular convex edge and the annular convex wall of the chuck base are engaged, and at the same time, the clutch portion is pressed by the compression spring and receives a resilient force in the backward direction,
The chuck is rotationally driven by the rotation of the rotating shaft connected to the pivot connecting portion at the front end of the rotating shaft that is exposed to the front side of the chuck table by sandwiching the drill bit,
With the above structure, the power tool main body is used as an electric driver by being combined with a driver bit having a rear end portion formed in a hexagonal shape that fits a hexagonal hole in the front end of the power output shaft, and the chuck base An electric tool for both a driver and a drill, which can be used as an electric drill by combining a member made of the chuck, in which the clutch portion and the drill bit are set, with a front end of the electric tool body.   The electric power tool body is screwed with a screwing sleeve having an internal thread on one inner side, an annular concave edge is provided on the surface of the screwing sleeve, and a substantial number of inner wall surfaces on the inner cover are formed on the annular concave edge. 2. The electric tool for both driver and drill according to claim 1, wherein the ball is fitted and the chuck portion is attached.

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