JP2007290071A - Power tool device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve assembling efficiency in a power tool device having a built-in motor in a part for holding a housing. <P>SOLUTION: The power tool device 10 is reduced in size by providing the built-in motor 12 in the part for holding the housing. The housing 30 is partitioned into three areas composed of: a motor storing area storing the motor 12 and a coutershaft 40; an output mechanism storing area storing an output mechanism part 20; and an electric system storing area storing an electric system part 50. The output mechanism storing area is set in the housing body part 31, and the motor storing area and the electric system storing area are set in a housing holding part 32. These three areas are partitioned by a partition wall formed in the housing. Preferably the output mechanism part 20 is covered with a case 24, the whole outer hull of which is constructed by combining at least three members. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a power tool device, and more particularly to an improvement of a power tool device that is made compact by incorporating a motor in a portion that receives a grip of a housing.

  2. Description of the Related Art Conventionally, an electric tool device is known as a device that transmits a driving force from a motor as a driving source to a tool to perform a desired operation. This type of electric tool device includes a motor and an output mechanism that transmits a driving force from the motor to the tool. The arrangement relationship between the motor and the output mechanism is arranged in series in the housing. (For example, refer to Patent Document 1 below).

  However, in the case of a conventional general power tool device as disclosed in the following Patent Document 1, since the motor and the output mechanism unit are arranged in series on the upper part of the device, the center of gravity is located above the device, There was a problem that the balance of the entire apparatus was very bad. If the center of gravity is positioned above the apparatus in this way, the work efficiency is also affected, and the work efficiency of the apparatus itself is also reduced.

  Therefore, as an apparatus for solving the above-described problems, for example, in Patent Document 2 below, the output mechanism unit is housed and arranged on the upper side (top) of the housing, and the gripping portion side that becomes the handle portion of the housing An electric tool device is disclosed in which a motor is housed and disposed in the (handle portion). And according to this electric tool apparatus, it is said that it is comparatively good and can provide an apparatus comfortable for a user to grip by hand.

JP 2000-42936 A Japanese Patent Laid-Open No. 2002-264042

  However, in the conventional electric power tool devices represented by Patent Documents 1 and 2, since the motor, the motor output shaft, and the output mechanism are all connected to the housing, the assembly is poor. Existed.

  In addition, it is necessary to store electrical wiring used for power supply to the motor and switch box in the housing. However, in the conventional electric power tool device, the electrical wiring is Since it is necessary to carry out a handling process, the existence of such a process has also caused a deterioration in assemblability. In particular, in the case of the conventional electric power tool device described in Patent Document 2, since the motor is housed and disposed on the grip portion side (handle portion) of the housing, the handling process of the electric wiring is further complicated. Therefore, the assembly work is expected to be complicated. Incidentally, the above-mentioned Patent Document 2 does not describe any means for improving the problems associated with changes in the device configuration, such as measures for facilitating the handling of electrical wiring.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to improve assemblability in an electric tool device that is made compact by incorporating a motor in a portion that receives the grip of the housing. Is to plan.

  The present invention will be described below. In addition, in order to make an understanding of this invention easy, the reference number of an accompanying drawing is attached in parenthesis writing, However, This invention is not limited to the form of illustration by it.

  The electric tool device (10) according to the present invention includes a motor (12) serving as a drive source, an output mechanism (20) that transmits a driving force from the motor (12) to the tool, and the motor (12). The motor output shaft (13) provided and the power transmission shaft (21) provided in the output mechanism section (20) are engaged, and the rotational driving force from the motor output shaft (13) is applied to the power transmission shaft (21). An intermediate shaft (40) capable of transmission, an electric system part (50) for supplying electric power from a power supply source to the motor (12) and controlling the motor (12), and an outline of the apparatus A power tool device (10) comprising a housing (30), wherein the power transmission shaft (21) is disposed at an angle with respect to the motor output shaft (13), the housing (30) Are the motor (12) and the intermediate Motor storage area (β) for storing (40), output mechanism storage area (α) for storing the output mechanism section (20), and electric system storage area (γ) for storing the electric system section (50). And is divided into three regions.

  In the electric tool device (10) according to the present invention, the housing (30) includes a tool body (31) in the front and a housing main body (31) that houses the output mechanism (20) therein, A housing grip that extends downward from the housing body (31), receives the grip from an operator, and houses the motor (12), the intermediate shaft (40), and the electrical system portion (50) inside. The housing main body (31) is provided with the output mechanism storage region (α), and the housing gripping portion (32) is provided with the motor storage region (β). ) And the electrical system storage area (γ), and the three areas are partitioned by a partition wall (30a) formed in the housing (30). It is possible to be.

  In the electric tool device (10) according to the present invention, the output mechanism (20) may be entirely covered with a case (24) configured by combining at least three members. it can.

  Furthermore, in the electric tool device (10) according to the present invention, the case (24) includes at least one of constituent members made of a metal material, and a bearing that can be installed in the case (24) ( 47), the intermediate shaft (40) can be pivotally supported.

  The summary of the present invention does not list all necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  In the present invention, in a power tool device that is made compact by incorporating a motor in a portion that receives the grip of the housing, a motor as a driving source, an output mechanism unit that transmits the driving force from the motor to the tool, An intermediate shaft that engages with a motor output shaft included in the motor and a power transmission shaft included in the output mechanism unit, and that can transmit a rotational driving force from the motor output shaft to the power transmission shaft, and a power supply source The electric system part for supplying the electric power to the motor and controlling the motor is unitized, and the storage area is divided in the housing so that these can be easily stored in the housing. Therefore, according to the present invention, it is possible to realize an electric power tool device having higher assemblability than the prior art.

  In the present invention, the partitioning of the housing is performed by the partition wall, so that the partition wall exhibits an electrical insulation function, and the movement of foreign matter within the housing is restricted, particularly in protecting the electrical wirings. A very suitable power tool device can be provided.

  Furthermore, in the present invention, the rigidity of the power tool device itself is improved by providing the housing with the partition wall and covering the output mechanism portion with the case.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. . Furthermore, although the electric tool device according to the present embodiment will be described by exemplifying a case where it is configured as an impact driver, the electric tool device according to the present invention is not limited to such a form, It can be applied to all power tool devices such as drills, screwdrivers, wrenches, saws, hammer drills, grinders, mixers, and trimmers.

  FIG. 1 is a longitudinal sectional side view showing the overall configuration of the electric power tool device according to the present embodiment. The power tool device 10 according to this embodiment shown in FIG. 1 is a type of device configured as a portable impact driver to which a power cord 51 is connected. And the electric tool apparatus 10 which concerns on this embodiment is the motor 12 used as a drive source as a main structural member, the output mechanism part 20 for transmitting the driving force from this motor 12 to a tool, the motor 12, An intermediate shaft 40 that is connected to the output mechanism unit 20 so as to be able to transmit a driving force, and an electric system unit 50 that supplies power from a power supply source to the motor 12 via the power cord 51 and controls the motor 12. And a housing 30 that forms the outer shell of the apparatus.

  The housing 30 is provided with a bit holder 25 as a tool mounting means on the front side, a housing main body 31 that houses the output mechanism unit 20 therein, and extends downward from the housing main body 31 for gripping by an operator. A housing holding portion 32 that receives the motor 12, the intermediate shaft 40, and the electric system portion 50 is provided. Thus, by arranging the motor 12 below the housing gripping portion 32 and considering the weight balance of the entire apparatus, the center of gravity is positioned at the approximate center of the apparatus. Is realized.

  As described above, the motor 12 serving as the drive source is housed and installed below the housing gripping portion 32, which is below the portion serving as the handle of the electric tool device 10. The motor 12 is installed such that a motor output shaft 13 for transmitting a motor driving force to the outside faces upward. Further, a brush 54 is disposed below, so that power from an external power supply source (not shown) can be received via the power cord 51 and the power can be converted into rotational motion. A cooling fan 15 is installed below the motor 12, and the cooling air generated by the fan 15 passes through the housing 30, so that an appropriate temperature state in the housing 30 is maintained. Yes.

  The output mechanism unit 20 installed in the housing body 31 includes a power transmission shaft 21 that is rotationally driven by the driving force of the motor 12 and an impact mechanism unit 22 that is coupled to the power transmission shaft 21. . The impact mechanism section 22 has an anvil 22a and a hammer 22b. In a screw tightening operation, an external torque (screw tightening resistance) exceeding a certain level is applied to the anvil 22a through a tool (not shown) attached to the bit holder 25. Is added, the hammer 22b strikes the anvil 22a in the rotational direction, thereby making it possible to perform strong screw tightening.

  The power transmission shaft 21 is provided with an output mechanism side bevel gear 23 for receiving the rotational driving force of the motor 12 on the side opposite to the impact mechanism portion 22 (that is, the rear side of the apparatus). The output mechanism side bevel gear 23 has a mounting hole in which a spline groove 23a is formed at the center of rotation. A spline groove 21 a is also formed on the outer peripheral surface of the power transmission shaft 21 where the output mechanism side bevel gear 23 is installed. The power transmission shaft 21 and the output mechanism unit side bevel gear 23 are connected to each other by fitting the spline grooves 21a and 23a. The reason for this configuration is to prevent the output mechanism side bevel gear 23 receiving the driving force from the motor 12 from directly receiving the axial striking force. By configuring the power transmission shaft 21 so as to be slidable in the axial direction, an axial striking force applied to the power transmission shaft 21 is released, and a direct impact force on the output mechanism side bevel gear 23 is released. Propagation is prevented.

  The intermediate shaft 40 is a shaft-like member for connecting the motor output shaft 13 included in the motor 12 and the output mechanism unit side bevel gear 23 included in the power transmission shaft 21. The intermediate shaft 40 is disposed so as to be parallel to the motor output shaft 13 included in the motor 12 in the axial direction, and is disposed at an angle with respect to the power transmission shaft 21. That is, in the electric power tool device 10 according to the present embodiment, the motor output shaft 13 disposed in parallel to the intermediate shaft 40 and the power transmission shaft 21 provided in the output mechanism unit 20 are disposed at an angle. . The intermediate shaft 40 operates the output mechanism unit 20 by transmitting the motor driving force from the motor output shaft 13 to the output mechanism unit side bevel gear 23, and this operation realizes a screw tightening operation with a tool (not shown). Has been.

  By arranging the motor output shaft 13 and the power transmission shaft 21 at an angle as described above, the outer shape of the housing 30 becomes a very ideal shape. Specifically, in the electric power tool device 10 according to the present embodiment, the motor 12 can be removed from the housing main body 31 in which both the motor 12 and the output mechanism unit 20 are accommodated and installed in the conventional electric power tool device. Therefore, the housing main body 31 has a very compact shape. By reducing the size of the housing main body 31, the operability of the apparatus in a narrow place is dramatically improved.

  In the intermediate shaft 40 according to the present embodiment, a first intermediate shaft 41 installed on the motor output shaft 13 side and a second intermediate shaft 42 installed on the power transmission shaft 21 side are connected in series. Further, it is configured as a two-divided axis.

  The first intermediate shaft 41 is provided with a gear 41 a that meshes with the gear portion of the motor output shaft 13 and receives the rotational driving force of the motor output shaft 13. The gear 41a reduces the rotational driving force of the motor 12, which is about 22,000 rpm, by one step.

  Further, a connecting member 43 is press-fitted into an upper end portion of the first intermediate shaft 41, and a key 44 is installed in a key groove formed in the upper end portion. On the other hand, a key groove is also formed at the lower end portion of the second intermediate shaft 42, and this key groove can be fitted into a key 44 installed on the first intermediate shaft 41. Then, the first intermediate shaft 41 and the second intermediate shaft 42 are connected by fitting the lower end portion of the second intermediate shaft 42 into the connection member 43, and further, the first intermediate shaft 41 and The connected state of both shafts is realized by the action of the key 44 fitted to both of the second intermediate shafts 42.

  Furthermore, an intermediate shaft side bevel gear 42a that meshes with the output mechanism side bevel gear 23 is installed at the upper end of the second intermediate shaft 42, where the second stage of deceleration is performed. Yes. With the above configuration, suitable transmission of the motor driving force by the intermediate shaft 40 is realized.

  As described above, in this embodiment, the intermediate shaft 40 that connects the motor output shaft 13 and the power transmission shaft 21 is not a single shaft, but is formed as a two-divided shaft. Since the assembly error can be absorbed, the meshing state of the gears is greatly improved, and the noise reduction effect can be exhibited.

  Further, the intermediate shaft 40 according to the present embodiment employs a configuration in which the first intermediate shaft 41 installed on the motor output shaft 13 side is shorter than the second intermediate shaft 42. By configuring the first intermediate shaft 41, which is subject to high-speed rotation, to be as short as possible, the rotational motion of the shaft is stabilized and the meshing state between the gears is improved, so that not only noise reduction is achieved. Also, the life of the apparatus can be improved with the stable driving of the apparatus.

  Further, for the first intermediate shaft 41 that decelerates the high-speed rotation of the motor output shaft 13 by one step, it is preferable to adopt a configuration in which both ends thereof are securely supported by bearings 45 and 46. As described above, the first intermediate shaft 41 close to the motor output shaft 13 is made as short as possible, and the bearings 45 and 46 are installed at both ends, so that the installation state of the first intermediate shaft 41 is further stable. In addition, effects such as noise reduction, improved gear meshing, stable driving, and longer life are further improved.

  On the other hand, the second intermediate shaft 42 can be configured longer than the first intermediate shaft 41 close to the motor output shaft 13, and the installation structure thereof is similar to that of the first intermediate shaft 41. There is no need to install it firmly and securely. Therefore, for the second intermediate shaft 42, the bearing 47 is installed only at one location close to the intermediate shaft side bevel gear 42a.

  The electrical system section 50 is mainly housed on the front side of the housing gripping section 32, and as shown in FIG. 1, a power cord 51 for supplying power from a power supply source (not shown) to the motor 12 The control circuit board 53 is connected to a switch panel 52 provided on the front side of the housing gripping portion 32 and transmits a control signal in accordance with the operation of the switch panel 52, and a commutator installed on the rotor of the motor 12. The brush 54 supplies electric power to the motor 12, the switch 58 that controls the motor 12 according to the amount of pressing, and a wiring cord (not shown) that electrically connects these electric devices.

  As mentioned above, although the main structural member of the electric tool apparatus 10 which concerns on this embodiment was demonstrated, the structure of the housing 30 can be mentioned as a significant structure which this embodiment has. The housing 30 having a configuration unique to this embodiment will be described with reference to FIG. Here, FIG. 2 is a longitudinal sectional side view for explaining the structure of the housing according to the present embodiment.

  As shown in FIG. 2, the housing 30 according to the present embodiment includes an output mechanism storage region α that stores the output mechanism unit 20, a motor storage region β that stores the motor 12 and the intermediate shaft 40, and the electrical system unit 50. It is characterized by being divided into three regions consisting of an electrical system storage region γ for storing the battery. And about 3 area | region which concerns on this embodiment, the structure that the output mechanism storage area | region (alpha) is provided in the housing main-body part 31, and the motor storage area | region (beta) and the electrical system storage area | region (gamma) are provided in the housing holding part 32 is employ | adopted. ing. By adopting such a configuration, the constituent members of the unitized power tool device 10 can be easily assembled, and the power tool device 10 with improved assemblability can be realized.

  In addition, it is suitable to employ | adopt the partition wall 30a provided in the housing 30 for the structure which partitions the housing 30 into three area | regions. By providing the partition wall 30a, the three regions are clearly divided, and when the output mechanism unit 20, the motor 12, the intermediate shaft 40, and the electric system unit 50, which are constituent members of the electric power tool device 10, are incorporated, The storage stability of these members in the housing 30 is improved. Moreover, since the partition wall 30a itself exhibits an electrical insulation function, it is particularly suitable from the viewpoint of protecting the electrical system unit 50. Furthermore, the partition wall 30a can also exert an effect of suppressing the spread of grease or dust that may be scattered from mechanical parts such as gears used in the housing 30, and thus particularly protects the electric system section 50. As a result, the durability can be improved and the life of the device itself can be extended. Furthermore, the presence of the partition wall 30a erected in the housing 30 improves the rigidity of the housing 30, thereby realizing the electric tool device 10 having a long life and high impact resistance.

  The preferred configuration of the housing 30 has been described above, but the power tool device 10 according to the present embodiment has more significant features. Such a feature is that a case 24 is provided so as to cover the output mechanism unit 20. The configuration and operation / effect of the case 24 will be described with reference to FIGS. Here, FIG. 3 is a longitudinal sectional side view of a main part for explaining the peripheral configuration of the case according to the present embodiment, and FIG. 4 is a longitudinal sectional side view for explaining the configuration of the case according to the present embodiment. FIG.

  As shown in FIGS. 1, 3, and 4, the output mechanism unit 20 according to this embodiment includes the housing main body 31 in a state where the entire outer shell is covered with a case 24 configured by combining at least three members. It is stored inside. Thus, the case where the output mechanism unit 20 is covered by the case 24 built in the housing main body unit 31 protects the output mechanism unit 20 that repeatedly receives a striking force and provides a stable and reliable driving force. This is to realize the transmission of

  The case 24 according to the present embodiment includes an impact mechanism housing case 24a that houses the output mechanism portion 20 on the front side of the housing body 31, a gear case 24b that supports the output mechanism portion side bevel gear 23 via a bearing 27, The rear end portion of the power transmission shaft 21 is supported by a bearing 26, and the output mechanism side bevel gear 23 is also supported by a bearing 27 via a bearing 27. Since the impact mechanism storage case 24a, the gear case 24b, and the bearing holder 24c are made of a metal material such as aluminum or an aluminum alloy, the impact mechanism storage case 24a, the gear case 24b, and the bearing holder 24c have rigidity that can withstand repeated hitting force.

  The assembly procedure of the case 24 is as follows. First, the bearing 26 is installed in the bearing holder 24c, and the bearing 27 in which the output mechanism side bevel gear 23 is assembled between the bearing holder 24c and the gear case 24b is sandwiched. The holder 24c and the gear case 24b are securely fixed. As this fixing means, a joining means such as screwing using a screw may be employed. Next, the output mechanism unit 20 including the power transmission shaft 21 is installed in this state. Then, by installing the impact mechanism storage case 24a with respect to the gear case 24b, the assembly of the output mechanism unit 20 stored in the case 24 is completed. In the present embodiment, the installation of the impact mechanism storage case 24a with respect to the gear case 24b is realized by screwing the screw grooves formed on the respective joint surfaces. Any joining means such as can be employed. However, it is preferable to adopt a method in which the bearing holder 24c and the gear case 24b, and the gear case 24b and the impact mechanism storage case 24a are joined easily and repeatedly in view of maintenance.

  Further, in the case 24 according to the present embodiment, a configuration is adopted in which the gear case 24b is provided with the opening 24b1 at the lower center portion so that the bearing 47 that supports the second intermediate shaft 42 can be installed. And since the gear case 24b is comprised with metal materials, such as aluminum or aluminum alloy, the case 24 which concerns on this embodiment can support the stable rotational motion of the 2nd intermediate shaft 42 now.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the embodiment.

  For example, in the power tool device 10 according to the present embodiment described above, the motor output shaft 13 is arranged at a position where the housing gripping portion 32 is to be gripped by the operator. The motor output shaft 13 receives the rotational driving force of about 22,000 rpm generated by the motor 12 as it is without being decelerated, and thus becomes the hottest part in the housing 30. Therefore, the power tool device 10 according to the present embodiment employs a configuration for temperature countermeasures as shown in FIGS. 5 and 6. Here, FIG. 5 is an external side view for explaining various improved examples of the electric tool device according to the present embodiment, and FIG. 6 explains various improved examples of the electric tool device according to the present embodiment. It is a longitudinal cross-sectional side view for doing.

  In the electric tool device 10 shown in FIGS. 5 and 6, a heat insulating member 62 is installed around a bearing 61 that receives the motor output shaft 13 serving as a high temperature portion (see FIG. 6). This heat insulating member 62 is a member formed of rubber or elastomer with high heat insulating performance, thermoplastic elastomer, plastic, resin, etc., and is installed directly on the bearing 61 that rotates at a high speed and becomes a high temperature part. It plays a role of suppressing the transmission of temperature to the housing gripping portion 32.

  Further, in the electric power tool device 10 shown in FIGS. 5 and 6, a heat insulating member 60 is also installed on a portion of the outer peripheral surface of the housing 30 that is to be gripped by the operator (shaded portion in FIG. 5). reference). The heat insulating member 60 is also preferably formed of rubber, elastomer, thermoplastic elastomer, plastic, resin or the like having high heat insulating performance. In addition, about this heat insulation member 60, it is possible to shape | mold simultaneously with the housing 30 which consists of plastics etc. by employ | adopting manufacturing methods, such as two-color molding.

  Further, in the electric power tool device 10 shown in FIGS. 5 and 6, the wind window 63 is provided around the position of the housing 30 corresponding to the installation position of the bearing 61 that receives the motor output shaft 13 that is the high temperature portion (see FIG. 5). 5). As the cooling fan 15 installed below the motor 12 rotates, cooling air is sucked from the wind window 63. Accordingly, the heat in the vicinity of the bearing 61 is cooled by the cooling air introduced from the wind window 63.

  By adding the improvement described with reference to FIGS. 5 and 6, a more preferable power tool device 10 is realized. In addition, it is clear from description of a claim that the form which added the above changes or improvement can also be included in the technical scope of this invention.

It is a longitudinal cross-sectional side view which shows the whole structure of the electric tool apparatus which concerns on this embodiment. It is a longitudinal cross-sectional side view for demonstrating the structure of the housing which concerns on this embodiment. It is a principal part longitudinal cross-section side view for demonstrating the periphery structure of the case which concerns on this embodiment. It is a longitudinal cross-sectional side view for demonstrating the structure of the case which concerns on this embodiment. It is an external appearance side view for demonstrating the various improvement examples of the electric tool apparatus which concerns on this embodiment. It is a longitudinal cross-sectional side view for demonstrating the various improvement examples of the electric tool apparatus which concerns on this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Electric tool apparatus, 12 Motor, 13 Motor output shaft, 15 Fan, 20 Output mechanism part, 21 Power transmission shaft, 21a Spline groove, 22 Impact mechanism part, 22a Anvil, 22b Hammer, 23 Output mechanism part side bevel gear, 23a Spline groove, 24 case, 24a impact mechanism storage case, 24b gear case, 24b1 opening, 24c bearing holder, 25 bit holder, 26 bearing, 27 bearing, 30 housing, 30a partition wall, 31 housing body, 32 housing gripping part, 40 intermediate shaft, 41 first intermediate shaft, 41a gear, 42 second intermediate shaft, 42a intermediate shaft side bevel gear, 43 connecting member, 44 key, 45, 46, 47 bearing, 50 electrical system section, 51 power cord , 52 Switch panel, 53 Control circuit board, 4 brushes, 58 switches, 60 heat insulating member, 61 a bearing, 62 a heat insulating member, 63 air windows, alpha output mechanism housing area, beta motor housing area, gamma electrical system housing area.

Claims (4)

A motor as a drive source;
An output mechanism for transmitting the driving force from the motor to the tool;
An intermediate shaft that engages with a motor output shaft provided in the motor and a power transmission shaft provided in the output mechanism unit, and is capable of transmitting a rotational driving force from the motor output shaft to the power transmission shaft;
An electric system section for supplying electric power from an electric power supply source to the motor and controlling the motor;
A housing constituting the outer shell of the device;
An electric tool device in which the power transmission shaft is arranged at an angle with respect to the motor output shaft,
The housing is
A motor storage area for storing the motor and the intermediate shaft;
An output mechanism storage area for storing the output mechanism unit;
An electrical system storage area for storing the electrical system part;
An electric power tool device that is partitioned into three regions. In the electric tool device according to claim 1,
The housing is
A housing main body provided with a tool mounting means on the front and housing the output mechanism inside;
A housing holding part that extends downward from the housing main body part, receives a grip from an operator, and houses the motor, the intermediate shaft, and the electric system part therein;
Consists of
The housing main body is provided with the output mechanism storage area,
The housing holding portion is provided with the motor storage area and the electrical system storage area,
The electric tool device according to claim 3, wherein the three regions are partitioned by a partition wall formed in the housing. In the electric tool device according to claim 1 or 2,
The power mechanism according to claim 1, wherein the output mechanism is covered with a case formed by combining at least three members. In the electric tool device according to claim 3,
The power tool device according to claim 1, wherein at least one of the constituent members of the case is made of a metal material, and the intermediate shaft can be supported via a bearing that can be installed in the case.

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