JP6169437B2 - Electric tool - Google Patents

Description

  The present invention relates to an electric tool in which an electric motor is installed inside a housing.

  Conventionally, in an electric tool, an electric motor is installed inside a housing forming an exterior (see, for example, Patent Document 1). This motor functions as a drive source for the electric tool. For this reason, electric power for driving the motor is supplied to the electric power tool. Here, this electric power is supplied from a mounted rechargeable battery or supplied from a household AC power source connected by an outlet. For this reason, the electric wire for supplying electric power with respect to a motor is wired inside the housing. This electric wire is electrically connected so that electric power can be supplied. In the middle portion of the electric wire, there may be provided an electrical component such as a connector for electrical connection so as to be separable or a capacitor for stabilizing the supply voltage. Hereinafter, electrical components such as connectors and capacitors provided for such electric wires will be collectively referred to as “intermediate electric wire structure”.

JP 2012-254526 A

  By the way, in the electric power tool described above, it is desirable to enhance the function of preventing water and dust from entering (hereinafter referred to as “waterproof and dustproof function”) from the viewpoint of quality improvement. From the viewpoint of such a power tool, it is required to devise a device that enhances the waterproof and dustproof function for the arrangement portion of the electric wire intermediate electrical structure.

  The present invention has been made in view of such circumstances, and a problem to be solved by the present invention is an electric tool in which an electric motor is installed inside a housing, and an electric wire wired inside the housing. It is to improve the waterproof and dustproof function regarding the electric intermediate structure of the electric wire provided in the intermediate portion of the cable.

In solving the above-described problems, the power tool according to the present invention takes the following means.
That is, the electric tool according to the first aspect of the present invention includes a motor, a housing that houses the motor, and an electric wire intermediate electric structure provided for an electric wire wired inside the housing, An arrangement site for placing the electric wire intermediate electrical structure is set inside the housing, and the arrangement site has a direction other than the direction in which the electric wire is drawn out of the periphery of the electric wire intermediate electric structure. A partition portion that partitions the interior of the housing from the placement site is provided in five directions.
According to the electric tool according to the first aspect of the present invention, the partition section partitions the inside of the housing and the arrangement site, so that the five directions other than the direction in which the electric wire is drawn out of the periphery of the electric intermediate wire structure are blocked. Thereby, it is possible to suppress water and dust from entering the intermediate electrical structure of the intermediate portion of the electric wire. Accordingly, it is possible to enhance the waterproof and dustproof function with respect to the electric intermediate electrical structure disposed inside the housing.
Moreover, the electric tool which concerns on 2nd invention is the electric tool which concerns on the said 1st invention, The said division part is shape | molded and provided integrally with the said housing, It is characterized by the above-mentioned.
The power tool according to a third aspect of the present invention is the power tool according to the first or second aspect of the present invention, wherein the arrangement direction of the material to be processed is set to the tool front side that is the work tool mounting side, The direction in which the electric wire is drawn out is set on the lower side of the tool, which is the battery mounting side, and the partition portion is provided with a wall structure that faces the upper side of the tool, the front side of the tool, and the rear side of the tool to separate the inside of the housing. It is characterized by that.
The power tool according to a fourth aspect of the present invention is the power tool according to any one of the first to third aspects of the present invention, wherein at least a portion of the wire intermediate electrical structure around which the wire is drawn is A seal member is provided in contact with the partition portion and having the arrangement site as a closed space.

An electric power tool according to a fifth aspect of the present invention is connected to a motor, a housing that houses the motor, an electric wire intermediate electrical structure provided for an electric wire wired inside the housing, and the electric wire intermediate structure. An elastic member provided so as to cover an outer periphery of the electric wire, and the housing forms a housing structure by combining the first divided housing and the second divided housing divided into two, The elastic member is supported by the first divided housing and the second divided housing.
According to a sixth aspect of the present invention, there is provided a power tool including a motor, a housing having a housing structure for housing the motor by combining the first divided housing and the second divided housing divided into two, the first A partition portion provided in one of the one split housing and the second split housing, and a seal member provided in the other of the first split housing and the second split housing, and the seal The member is formed so as to be able to contact the partition portion.
According to a seventh aspect of the present invention, there is provided a power tool including a brushless motor, a control board on which a microcomputer for controlling the brushless motor is mounted, a first electric wire connected to the control board, and a terminal on a power supply side. A second electric wire connected to the first electric wire, and an intermediate electric structure connected to the first electric wire, and the electric wire intermediate An intrusion restricting member that restricts intrusion of foreign matter into the inside of the electric structure is provided.

It is sectional drawing which shows the right side half cross section of the impact driver of 1st Embodiment. It is sectional drawing which shows the left side half cross section of the impact driver of FIG. It is sectional drawing which shows the partition wall structure except the connector of FIG. It is sectional drawing which shows the (IV)-(IV) cross-section arrow of FIG. It is sectional drawing which shows the (V)-(V) sectional arrow of FIG. It is sectional drawing which shows the (VI)-(VI) section arrow of FIG. It is sectional drawing which shows the right side half cross section of the impact driver of 2nd Embodiment. FIG. 8 is a cross-sectional view showing a left-side half cross section of the impact driver of FIG. 7. It is sectional drawing which shows the partition wall structure except the connector of FIG. It is sectional drawing which shows the (X)-(X) cross-section arrow of FIG. It is sectional drawing which shows the (XI)-(XI) cross-section arrow of FIG. It is sectional drawing which shows the (XII)-(XII) cross-section arrow of FIG. It is sectional drawing which shows the (XIII)-(XIII) cross-section arrow of FIG.

[First Embodiment]
Hereinafter, a first embodiment for carrying out an electric tool according to the present invention will be described. The impact driver 10 shown in FIGS. 1 to 6 corresponds to an electric tool according to the present invention. FIGS. 1-6 has shown the cross section regarding the impact driver 10 of 1st Embodiment. Specifically, the cross-sectional view of FIG. 1 shows a right-hand half cross section of the impact driver 10. The cross-sectional view of FIG. 2 shows a left-hand half cross section of the impact driver 10 of FIG. 3 shows a partition wall structure excluding the connector 71 and the like in FIG. The cross-sectional view of FIG. 4 shows the (IV)-(IV) cross-sectional arrow view of FIG. The cross-sectional view of FIG. 5 shows the (V)-(V) cross-sectional arrow view of FIG. The cross-sectional view of FIG. 6 shows the (VI)-(VI) cross-sectional arrow view of FIG.
In the following description, the impact driver 10 defines the front, rear, top, bottom, left and right with respect to the impact driver 10 in view of normal usage. That is, the front / rear / up / down / left / right directions of the impact driver 10 are defined in the directions as shown in all the drawings. That is, as a normal usage mode of the impact driver 10, the impact driver 10 is in a state where it is gripped as if a pistol is gripped. For this reason, in consideration of such a grip state, the vertical and horizontal directions of the impact driver 10 are defined. Specifically, the direction in which the material to be processed (work material) is arranged is defined as the front side (tool front side) of the impact driver 10. The opposite side is defined as the rear side of the impact driver 10. Further, the direction of the battery mounting side is defined as the tool lower side, and the opposite side of the tool lower side is defined as the upper side of the impact driver 10.

As shown in FIGS. 1 to 3, the impact driver 10 is an electric tool to which a rechargeable battery 95 is attached as a power source, and the rechargeable battery 95 is attached to the lower part of the tool body 100. In addition, the code | symbol 99 shown is a string-shaped hook. The hook 99 enables the impact driver 10 to be hooked and stored. Further, when the impact driver 10 is used, the grip portion 60 can be grasped with the user's hand (arm) passed through the ring-shaped portion of the hook 99.
The tool main body 100 is configured so as to be able to perform a machining operation in the form of a pistol with the rechargeable battery 95 attached. The tool body 100 generally includes a drive output unit 30, a grip unit 60, and a battery mounting unit 90 from above.
The drive output unit 30 generally includes an electric motor unit 31 and a drive conversion mechanism 41. The electric motor portion 31 is accommodated in the motor housing portion 21 that is a part of the exterior housing 20. The exterior housing 20 having the motor housing portion 21 has a structure in which the left housing 201 and the right housing 205, which are divided in half on the left and right sides, are combined and screwed together. As shown in FIG. 2 and the like, this screw fastening is fixed by screws at four screw fastening portions 28 in the motor housing portion 21, and is also screw fixed by four screw fastening portions 29 in the grip housing portion 25. ing. The left housing 201 corresponds to a first divided housing divided into two according to the present invention, and the right housing 205 corresponds to a second divided housing divided into two according to the present invention.
A front cover 37 is attached to the front side of the motor housing portion 21. The front cover 37 is a molded member made of a resin material, and is provided so as to cover the outer periphery of the front gear case 421 of the drive conversion mechanism 41 described later. A rear cap 38 is attached to the rear side of the motor housing portion 21 with a left spiral on the left housing 201 and a right spiral with the right housing 205, respectively. The rear cap 38 is also a resin material molding member and is provided so as to cover the rear side of the electric motor 32. The rear cap 38 supports a rear bearing 362 that supports the rear end portion of the motor shaft 35. Further, although not shown, the rear cap 38 is provided with an exhaust hole that allows the outside air to be exhausted toward the electric motor unit 31.

The electric motor unit 31 includes an electric motor 32 that is driven to rotate in accordance with a user operation. The electric motor 32 is configured by a brushless motor. The electric motor 32 corresponds to the motor according to the present invention, and converts supplied electric power into a rotational driving force. That is, the electric motor 32 roughly includes a stator 33, a rotor 34, and a motor shaft 35, similar to a normal brushless motor. The stator 33 is configured as a stator of a so-called three-layer motor, and is supported by the motor housing portion 21. The magnetism of the stator 33 is switched by power control from a controller described later. The rotor 34 is supported by a motor shaft 35 that forms a rotating shaft and rotates relative to the stator 33. The rotor 34 has a permanent magnet. The motor shaft 35 is rotatably supported by the bearings 361 and 362 at the front and rear. The front bearing 361 is incorporated in the bearing box 422. For this reason, the front bearing 361 is supported by the motor housing part 21 as a part of the bearing box 422 supported by the motor housing part 21. The rear bearing 362 is supported by the rear cap 38. A cooling fan 36 is attached to the motor shaft 35. The cooling fan 36 rotates integrally with the motor shaft 35 and sucks outside air from a suction hole (not shown) arranged on the side surface of the motor housing portion 21, and then is provided on the rear cap 38 (not shown). Exhaust from the exhaust hole. In the electric motor unit 31, the rotation of the rotor 34 is controlled by the motor circuit board 39. That is, the motor circuit board 39 is provided with an output sensor (not shown) that outputs the permanent magnet of the rotor 34. The output sensor provided on the motor circuit board 39 is connected to five output lead wires (not shown). The motor circuit board 39 is connected with three power supply cords for supplying power to the stator 33 (not shown).
A drive conversion mechanism 41 is provided on the front side of the electric motor unit 31. The drive conversion mechanism 41 is configured by incorporating a speed reduction mechanism 43 and a striking mechanism 51 in a gear case 42 (a front gear case 421 and a bearing box 422). The drive conversion mechanism 41 transmits the rotational driving force from the electric motor 32 to the anvil 57 protruding forward. The speed reduction mechanism 43 is configured by a planetary gear mechanism. That is, the sun gear 44 rotates upon receiving the rotational drive from the motor shaft 35 described above, and the planetary gear train 45 meshed with the sun gear 44 on the outer periphery of the sun gear 44 also rotates. The planetary gear train 45 further meshes with an outer peripheral internal gear 46. For this reason, when the sun gear 44 rotates, the meshing planetary gear train 45 also rotates. Thereby, the rotation of the rotor 34 is decelerated and the intermediate shaft 52 rotates. In this manner, the rotational drive from the electric motor 32 is transmitted to the striking mechanism 51 described below as a reduced rotational drive.

  The striking mechanism 51 generally includes an intermediate shaft 52, a biasing spring 53, and a hammer 54. The intermediate shaft 52 rotates integrally with the internal gear 46 described above, and is rotatably supported by a bearing 59 provided in the bearing box 422. The biasing spring 53 biases the hammer 54 toward the front side. The hammer 54 strikes a striking piece 55 that is integrated with the anvil 57. Reference numeral 56 denotes a needle bearing. The anvil 57 is configured to have a chuck mechanism to which a screwdriver screw B for screwing can be attached. The driver bit B corresponds to the processing tool according to the present invention. When the hitting mechanism 51 configured as described above receives an external torque (screw tightening resistance) equal to or higher than the set torque on the anvil 57 via the driver bit B during the screw tightening rotation, the hammer 54 moves against the intermediate shaft 52. It rotates forward and backward in the axial direction. Then, the hammer 54 strikes the striking piece 55 in the rotation direction, and causes the anvil 57 integrated with the striking piece 55 to output a large screw tightening torque. The bearing box 422 incorporates the above-described front bearing 361 in addition to the bearing 59. Further, it is screwed by a screw fastening portion 28 at a vertical position of the motor shaft 35 between the electric motor 32 and the bearing box 422. An anvil 57 serving as an output shaft protrudes from the front end of the front gear case 421 toward the front side. The front gear case 421 corresponds to a front case according to the present invention and also corresponds to a hammer case according to the present invention. The anvil 57 corresponds to the output shaft according to the present invention. Further, an LED (light emitting diode) irradiation device 58 is provided below the anvil 57 described above. The LED irradiation device 58 illuminates a screw tightening place when screw tightening work is performed with a driver bit B or the like.

  A grip portion 60 is provided below the drive output portion 30 configured as described above. The grip portion 60 is formed by the grip housing portion 25 that is a part of the exterior housing 20. The grip housing portion 25 is formed integrally with the motor housing portion 21 described above, and forms the exterior housing 20. The grip housing portion 25 is also referred to as a handle housing, and is formed by imitating the grip of a pistol so that the user can easily operate the hand gripped state. Specifically, the grip housing portion 25 has a grip shape extending in a direction substantially orthogonal to the motor shaft 35. The grip housing portion 25 is formed to extend further downward from the lower portion of the motor housing portion 21 in a grip shape. A battery mounting portion 90 shaped like a grip end of a baseball bat is provided below the grip portion 60. The battery mounting portion 90 is formed so that the front / rear / left / right cross section of the grip portion 60 further expands in the front / rear / left / right direction. A rechargeable battery 95 is mounted on the battery mounting portion 90. The rechargeable battery 95 is used as a common rechargeable power source for electric tools, and is slid to be mounted or slid to be removed. For this reason, the battery mounting part 90 is comprised corresponding to attachment or detachment of a slide type. The rechargeable battery 95 is removed from the tool main body when the amount of charged electric power is less than a predetermined amount of electric power, charged with a dedicated charger, mounted again on the tool main body, and used as a power source. In other words, examples of the rechargeable battery 95 include “BL1430” products in the Makita General Catalog issued in April 2012, and examples of the electric tools to be mounted include a driver, a wrench, a drill, a reciprocating saw, a chain saw, a band saw, a jigsaw. , An appropriate power-driven electric tool such as Marunoco, grinder, and tacker.

As shown in FIG. 2 and the like, a drive switch 65 is provided below the drive output unit 30 described above. The drive switch 65 is provided in the upper part of the grip portion 60 and generally includes a switch body 66, an operation trigger 67, and a rotation direction switching button 68. The switch body 66 is installed inside the grip housing portion 25. The switch body 66 transmits an input signal to the controller 15 described later in response to operation inputs from the operation trigger 67 and the rotation direction switching button 68. The operation trigger 67 is provided so as to be able to be pushed substantially backward with respect to the grip portion 60. The rotation direction switching button 68 is provided so as to be slidable in the left-right direction with respect to the grip portion 60. When the rotation direction switching button 68 is pushed from the right side and is arranged at the left side position, the rotation direction switching button 68 performs a forward (right rotation) operation input, and is pushed from the left side and arranged at the right side position. If it is, the operation input for reverse rotation (left rotation) is performed. The operation trigger 67 is configured such that the user can perform a pulling operation with a finger while holding the grip portion 60. The controller 15 controls to supply electric power to the electric motor 32 based on an input signal from the switch body 66. The electric motor 32 is supplied with electric power from the rechargeable battery 95 mounted on the battery mounting unit 90. Two screw fastening portions 29 for holding the combined state of the left housing 201 and the right housing 205 are provided below the switch body 66 described above. The left housing 201 and the right housing 205 screwed in this way form a grip housing portion 25 that is a part of the exterior housing 20.
Thus, the grip part 60 provided with the drive switch 65 in the upper part is formed in a grip shape in which the intermediate part and the lower part can be gripped. A wiring structure 70 for connecting a controller 15 to be described next is provided at an intermediate portion and a lower portion of the grip portion 60. The wiring structure 70 will be described after the following description of the controller 15.

The controller 15 performs drive control of the electric motor 32 described above. The controller 15 is provided on the upper part of the battery mounting unit 90. The battery mounting portion 90 is provided with a mounting portion 91 to which the rechargeable battery 95 is mounted at a lower surface portion facing downward. The mounting portion 91 is configured to be mounted by sliding the rechargeable battery 95 from the front to the rear. In other words, the battery mounting unit 90 can remove the mounted rechargeable battery 95 from the battery mounting unit 90 by sliding the mounted rechargeable battery 95 forward afterwards. For this reason, although a detailed description is omitted, the mounting portion 91 is provided with a structure for sliding mounting and a structure for electrically connecting the rechargeable battery 95 when mounting.
The controller 15 is fixedly held above the mounting portion 91. The controller 15 controls the rotational drive of the electric motor 32 described above, and is configured as a control component in which an appropriate control board and the like are installed. Note that a microcomputer for controlling the electric motor 32 constituting the brushless motor is mounted on the control board. The controller 15 is configured as an integral part having a rectangular exterior. Although not shown, the controller 15 is wired so as to be electrically connected to the rechargeable battery 95 mounted on the mounting portion 91 described above. The controller 15 is electrically connected to a communication terminal 17 via a wiring structure 70 described in detail below. The communication terminal 17 is a terminal to which a plurality of signal terminals (not shown) provided in the rechargeable battery 95 are connected when the rechargeable battery 95 is slid on the mounting portion 91. Make a structure. The communication terminal 17 connected in this way transmits a signal related to battery information such as the battery temperature of the rechargeable battery 95 to the controller 15 via the second lead wire 722.

The wiring structure 70 has a structure for electrically connecting the controller 15, the electric motor 32, the drive switch 65, and the like. The wiring structure 70 is provided inside the grip housing portion 25 below the two screw fastening portions 29 described above. The reference symbol “L” is a lead wire corresponding to the electric wire according to the present invention. Note that only a part of the lead wire L is shown for easy understanding of the drawing. Moreover, the connector 71 which comprises this wiring structure 70 is corresponded to the electric wire intermediate electrical structure which concerns on this invention. The wiring structure 70 is provided for the lead wire L disposed inside the grip housing portion 25. That is, the wiring structure 70 includes the lead wire L that is electrically connected as described above, and the electrical structure provided for the lead wire L. In this embodiment, the electrical structure is provided with a connector 71 for connecting the ends of the lead wires L separated into two. The electrical structure is not limited to such a connector 71, and appropriate electrical components such as a control component such as a controller and an operation component such as a drive switch may be provided.
The connector 71 is configured so that the end of the lead wire L can be electrically connected. The connector 71 has a resin female connector 73 and a male connector 74 as usual, like a connector. The female connector 73 is provided with respect to the end portion of the first lead wire 721 connected to the controller 15. The male connector 74 is provided for the second lead wire 722 connected to the communication terminal 17. Specifically, the female connector 73 includes a female hook portion 732 that hooks a hook while having a female fitting portion 731 into which the male connector 74 can be fitted. The male connector 74 has a male hook portion 742 that hooks a hook while having a male fitting portion 741 that can be fitted into the female fitting portion 731. The first lead wire 721 corresponds to the first electric wire according to the present invention, and is connected to the controller 15 including a control board. The second lead wire 722 corresponds to the second electric wire according to the present invention, and is connected to the communication terminal 17 on the power supply side. As described above, the connector 71 is configured as an intermediate electrical structure for connecting the first lead wire 721 and the second lead wire 722. That is, the connector 71 is separably connected when transmitting a signal from the communication terminal 17 to the controller 15. The connector 71 is intended to be separated from the controller 15 and replace the communication terminal 17 at a low cost when only the communication terminal 17 is damaged. For this reason, when the communication terminal 17 is replaced, the controller 15 remains in the tool main body 100, the male connector 74 is separated from the female connector 73 and is damaged, and only the communication terminal 17 is replaced with the tool main body 100. Remove from. Next, the new male connector 74 is connected to the connected female connector 73 while the new communication terminal 17 is built in the tool body 100. If the connection is made via the connector 71 in this way, only the communication terminal 17 can be exchanged at low cost without any changes to the controller 15 including the first lead wire 721. That is, the connector 71 is an intermediate connection location of the lead wire L that transmits a signal. In addition, since this signal is weak as an electric current, it is desirable to further improve the signal short-circuit prevention from the viewpoint of preventing malfunction.

Thus, the partition part 75 is provided in the arrangement | positioning site | part 710 for arrange | positioning the connector 71. FIG. The partition portion 75 is provided inside the grip housing portion 25. The partition portion 75 corresponds to an intrusion restricting member according to the present invention, and is provided on the outer side of the connector 71 described above. That is, the partition portion 75 partitions a placement portion 710 for placing the connector 71 and a portion inside the other grip housing portion 25. That is, the partition part 75 is configured to surround the periphery of the connector 71 so as to restrict entry of foreign matter into the inner side of the connector 71. The partition part 75 generally includes a partition wall part 76 and a separating member 85. The partition wall portion 76 is formed integrally with the grip housing portion 25.
Hereinafter, the partition wall 76 and the separating member 85 will be described in detail. A covering grip 26 is provided on the outer peripheral surface of the grip housing portion 25 described above. The covering grip 26 is formed using an elastomer as a material. The covering grip 26 is formed to have an appropriate stepped outer peripheral surface, and the grip performance when gripping is secured.
The partition wall part 76 has comprised the wall structure protruded inside the grip housing part 25, as shown in FIGS. The partition wall portion 76 has an action of separating the inside of the grip housing portion 25. Specifically, the partition wall section 76 partitions the inside of the grip housing section 25 and the arrangement site 710 where the connector 71 is disposed. The grip housing portion 25 including the partition wall portion 76 acts so as to separate the inside of the grip housing portion 25 in five directions of front, rear, upper, left, and right, excluding the lower side, among the six directions of front, rear, up, down, left, and right around the connector 71. To do. That is, both of the lead wires L of the connector arranged in the arrangement portion 710 divided by the dividing portion 75 are set so as to be drawn out downward. That is, the partition wall portion 76 is formed so that the lower side is opened so that the lead wire L can be pulled out.

  Specifically, the partition wall portion 76 is provided to the right housing 205 of the grip housing portion 25. The partition wall 76 is formed by an upper side wall 77, a front side wall 78, and a rear side wall 79. The upper side wall portion 77 is formed on the upper side relative to the arrangement site 710 so as to partition the upper portion of the arrangement site 710. The upper side wall portion 77 shown in FIG. 3 has a wall shape in which the arrangement direction is bent so as to form a substantially letter shape in a side view. The upper side wall 77 having the arrangement shape bent in this way is advantageous for securing a space for wiring the lead wire L and also for arranging other electrical components. On the other hand, the front side wall portion 78 and the rear side wall portion 79 have a flush wall shape that is arranged in parallel to each other. The front side wall portion 78 is formed on the front side relative to the arrangement site 710 so as to partition the front portion of the arrangement site 710. The rear side wall 79 is formed on the rear side relative to the arrangement site 710 so as to partition the rear portion of the arrangement site 710. Since the front side wall part 78 and the rear side wall part 79 are formed so as to be parallel to each other, a space capable of accommodating the connector 71 is ensured but is not excessively bulky. The upper side wall portion 77, the front side wall portion 78, and the rear side wall portion 79 are connected so as to cover a portion other than the lower side of the arrangement portion 710. Further, the right side range of the placement site 710 is configured to partition the placement site 710 by the right housing 205 itself functioning like a partition. Further, the left side range of the placement site 710 is configured to partition the placement site 710 by a separating member 85 described in detail later.

As shown in FIG. 3, the front side wall part 78 and the rear side wall part 79 are provided with ribs 80 protruding in directions facing each other. The ribs 80 are provided as a connector support rib 81, an upper holding rib 82, and a lower holding rib 83 in order from the top. The connector support rib 81 protrudes from the front side wall part 78 and the rear side wall part 79 so as to sandwich the connector 71. The connector support rib 81 protrudes until it can contact the connector 71 so as to support the connector 71. Further, the upper holding rib 82 and the lower holding rib 83 protrude so as to support a separating member 85 described below. The connector support rib 81, the upper holding rib 82, and the lower holding rib 83 also increase the rigidity of the partition wall portion 76. The upper holding rib 82 and the lower holding rib 83 can be protruded inside so as to reduce the opening area of the partition wall portion 76, and the arrangement state of the separating member 85 can be held. In other words, the separating member 85 is disposed and held inside the grip housing portion 25 by being sandwiched between the upper holding rib 82 and the lower holding rib 83 in the vertical direction.
The isolation member 85 is formed as a member that is disposed around the partition wall portion 76 that is the periphery of the connector 71. The isolation member 85 is formed of an elastic material. For this reason, the separating member 85 has such a soft property that it can be elastically deformed. Further, the isolation member 85 has a function as a seal member that can be brought into close contact by elastic deformation. That is, the isolation member 85 corresponds to the seal member according to the present invention and also corresponds to the elastic member according to the present invention, and is mainly provided at a location where the lead wire L is drawn out as described in detail below. This isolation member 85 is in contact with the partition wall 76 and makes the arrangement site 710 a closed space.
The isolation member 85 is generally arranged so as to mainly close the interposition member 86 arranged so as to fill a gap formed between the partition wall portion 76 and the left housing 201 and an opening for drawing out the lead wire L. It is comprised by two types with the obstruction | occlusion member 87. FIG. As will be described in detail below, the intervening member 86 of this embodiment closes the opening for drawing out the lead wire L in addition to the function of filling the gap formed between the partition wall portion 76 and the left housing 201. It also has a function.

  As shown in FIG. 4, the interposition member 86 has a substantially L shape when viewed along the front-rear direction. That is, the interposition member 86 includes an interposition portion 861 extending substantially in the vertical direction, and a closing portion 865 that is connected to the lower portion of the interposition portion 861 and extends in the substantially left-right direction. The interposition part 861 and the closing part 865 are integrally formed of a soft elastic resin material and are formed as an integral part. An outer peripheral portion 862 set on the left side of the intervening portion 861 is formed so as to be in close contact with the inner peripheral surface 202 of the left housing 201. On the other hand, the inner peripheral part 863 set on the right side of the intervening part 861 in the figure is formed so that the left end 771, 781, 791 of the partition wall part 76 abuts. Each of these left side ends 771, 781, 791 is a left side end in the above-mentioned upper side wall part 77, front side wall part 78, and rear side wall part 79. As shown in FIGS. 4 to 6, the left ends 771, 781, and 791 abut against the interposition part 861 of the interposition member 86 so as to decrease. For this reason, the interposition member 86 is pressed toward the inner peripheral surface 202 of the left housing 201 by the contact with which the partition wall portion 76 is reduced. The outer peripheral portion 862 of the interposed member 86 pressed in this way comes into close contact with the inner peripheral surface 202 of the left housing 201 and is supported from the left housing 201. In this way, the partition wall portion 76 closes the range of the upper front side rear side of the arrangement site 710 of the connector 71 by the contact of the interposed member 86 with the interposed portion 861. Note that the lower range of the placement site 710 is not partitioned by the partition wall 76, and is set as a location where the lead wire L drawn from the connector 71 is placed. The interposition member 86 corresponding to the seal member according to the present invention is supported by sandwiching the left housing 201 and the right housing 205. However, the support of the interposed member 86 may be supported by a rib provided as appropriate with respect to the left housing 201 or may be attached to and supported by the left housing 201.

Further, a closing portion 865 formed so as to protrude to the right side is provided at the lower portion of the above-described interposing member 86. When the interposition member 86 is arranged along the arrangement site 710, the occlusion portion 865 contacts the occlusion member 87 arranged adjacent to the right side. That is, the contact surface 866 that contacts the closing member 87 is set on the right end surface of the closing portion 865. In addition, this obstruction | occlusion part 865 has an extended shape so that it may protrude on the right side. A pressure receiving portion 867 is set on the outer peripheral portion 862 opposite to the contact surface 866 of the closing portion 865. The pressure receiving portion 867 is supported by being in contact with the inner peripheral surface 202 of the left housing 201 when the closing member 87 is in contact with the contact surface 866. A pressing portion 203 that presses the pressure receiving portion 867 is provided on the inner peripheral surface 202 of the left housing 201. Specifically, the pressing portion 203 is formed so as to rise upward from the inner peripheral surface 202 of the left housing 201, and the blocking portion 865 is more positively directed toward the right housing 205 than the interposition portion 861. Acts like pressing. As a result, the closing portion 865 well closes the lower range of the arrangement site 710 that is not partitioned by the partition wall portion 76 together with the closing member 87.
The closing portion 865 is provided with a through hole 868 for drawing out the four lead wires L drawn from the connector 71 from the arrangement site 710 of the connector 71. Four through holes 868 are provided corresponding to the four lead wires L. The through hole 868 has an inner diameter smaller than the outer diameter of the lead wire L, and the lead wire L is inserted into the through hole 868 without any gap.

  The closing member 87 is arranged so as to close the opening portion for drawing out the lead wire L together with the closing portion 865 of the interposed member 86 described above. That is, the closing member 87 acts to fill the remaining opened portion when the closing portion 865 of the interposed member 86 is closed. That is, the closing member 87 is formed in a substantially rectangular shape, has an abutting surface 871 that abuts on the closing portion 865 disposed adjacent to the left side, and an outer peripheral portion on the side opposite to the abutting surface 871. In 872, a pressure receiving portion 873 is set. The pressure receiving portion 873 is also supported by being in contact with the inner peripheral surface 206 of the right housing 205 in the same manner as the pressure receiving portion 873 of the closing portion 865 described above. A pressing portion 207 that presses the pressure receiving portion 873 is also provided on the inner peripheral surface 206 of the right housing 205. Specifically, the pressing portion 207 is also formed so as to rise from the inner peripheral surface 206 of the right housing 205 and acts to positively press the closing member 87 toward the left housing 201. To do. As a result, the closing member 87 well closes the lower range of the arrangement site 710 that is not partitioned by the partition wall portion 76 together with the closing portion 865 described above. As shown in FIG. 2 and the like, the closing member 87 is supported so as to be sandwiched between the upper holding rib 82 and the lower holding rib 83. That is, the closing member 87 is supported by the left housing 201 and the right housing 205. The closing member 87 covers the outer periphery of the lead wire L drawn from the connector 71 as shown in FIG. In addition, the arrangement portion 710 of the connector 71 forms a closed space by the partition portion 75 formed by the partition wall portion 76 and the isolation member 85 described above.

  According to the partition part 75 configured in this way, the inside of the grip housing part 25 and the arrangement site 710 of the connector 71 can be partitioned. That is, in the periphery of the connector 71, the five directions of the upper front rear rear right side left side other than the lower side from which the lead wire L is drawn out are closed by the grip housing part 25 including the partition wall part 76 and the interposition member 86. can do. The lower side from which the lead wire L is drawn out can be closed by a closing member 87 supported by the grip housing portion 25. As a result, water and dust can be prevented from entering the connector 71 provided in the intermediate portion of the lead wire L. Accordingly, the waterproof and dustproof function for the connector 71 disposed inside the grip housing portion 25 can be enhanced. Note that the lead-out direction of the lead wire L drawn from the connector 71 arranged at the arrangement site 710 is set to the lower side, and the five directions of the upper front side rear right side left side are surrounded by the partition wall portion 76. Accordingly, when the impact driver 10 is normally used or normally placed, it is possible to easily prevent water flowing in the direction of gravity. Further, the partition section 75 described above has a structure formed by assembling the left housing 201 and the right housing 205 forming the grip housing section 25. Thus, when the connector 71 is taken out, it can be taken out automatically by removing the left housing 201 and the right housing 205 from each other. Therefore, the work of taking out the connector 71 can be simplified. Further, since the partition portion 75 configured in this way is set inside the grip housing portion 25 that is likely to become a dead space, the connector that forms a closed space while suppressing bulkiness of the tool body 100. 71 arrangement parts 710 can be secured.

[Second Embodiment]
Next, a second embodiment different from the first embodiment described above will be described with reference to FIGS. Note that the second embodiment is also configured by an impact driver 10A similar to the first embodiment described above. However, in the impact driver 10A of the second embodiment, only the configuration of the wiring structure 70 is different from the impact driver 10 of the first embodiment described above. For this reason, in this 2nd Embodiment, the code | symbol same as the above-mentioned code | symbol is attached | subjected about the location comprised same as above-mentioned 1st Embodiment, and the description shall be abbreviate | omitted.
The impact driver 10A shown in FIGS. 7 to 13 corresponds to the electric tool according to the present invention. 7 to 13 show cross sections of the impact driver 10A according to the second embodiment. Specifically, the cross-sectional view of FIG. 7 shows a right-hand half cross section of the impact driver 10A. The cross-sectional view of FIG. 8 shows a left-hand half cross section of the impact driver 10A of FIG. 9 shows a partition wall structure excluding the connector 71A shown in FIG. The cross-sectional view of FIG. 10 shows the (X)-(X) cross-sectional arrow view of FIG. The cross-sectional view of FIG. 11 shows the (XI)-(XI) cross-sectional arrow view of FIG. The cross-sectional view of FIG. 12 shows the (XII)-(XII) cross-sectional arrow view of FIG. The cross-sectional view of FIG. 13 shows the (XIII)-(XIII) cross-sectional arrow view of FIG.

The wiring structure 70A according to the second embodiment is an example in which the lead lines L are not drawn in one direction compared to the wiring structure 70 according to the first embodiment described above. That is, in the wiring structure 70 of the first embodiment, both the first lead wire 721 and the second lead wire 722 that form the lead wire L in the six directions of front, rear, up, down, left and right around the connector 71 are: It was set to be pulled out downward. On the other hand, in the wiring structure 70A of the second embodiment, each of the first lead wire 721A and the second lead wire 722A forming the lead wire L in the six directions of front, rear, up, down, left and right around the connector 71A. Are set so as to be drawn out in directions opposite to each other. Specifically, the first lead wire 721A connected to the controller 15 is drawn out downward, and the second lead wire 722A connected to the drive switch 65 is drawn out upward. It is supposed to be. That is, each of the first lead wire 721A and the second lead wire 722A is set so as to be drawn out in the direction in which the lead wire L is connected. The connector 71A is configured substantially the same as the connector 71 in the above-described first embodiment, and includes a resin female connector 73A and a male connector 74A.
By the way, since the lead wire L of the connector 71A of the second embodiment is divided into an upper side and a lower side, the partition portion 75A of the second embodiment is connected to the lead wire L. The structure corresponding to the drawer is adopted. That is, the partition wall portion 76A constituting the partition portion 75A is provided with an opening shape so that the lead wire L can be drawn out not only on the lower side but also on the upper side. Specifically, the grip housing portion 25A including the partition wall portion 76A has an inner portion of the grip housing portion 25A in the four directions of front, rear, left and right except for the lower side and the upper side among the six directions of front, rear, upper, lower, left and right around the connector 71A. It works to separate.
The connector 71A of the second embodiment is configured to connect the controller 15 and the drive switch 65, but is configured to connect the controller 15 and the motor circuit board 39 described above. There may be. Specifically, the connector 71A is connected to the controller 15 and the motor circuit board 39 via five output lead wires (not shown) connected to the motor circuit board 39 or three power supply cords (not shown). May be configured to connect.

The partition portion 75A is formed to have a substantially symmetrical structure that forms a vertical mirror structure with the position where the connector 71A is disposed as an intermediate position. Specifically, the partition wall portion 76A is provided with respect to the right housing 205 in the grip housing portion 25A. The partition wall portion 76A is formed by a front side wall portion 78A and a rear side wall portion 79A. The front side wall portion 78A and the rear side wall portion 79A are configured in substantially the same manner as in the first embodiment described above, and have a substantially symmetrical structure that forms a vertical mirror structure with the position where the connector 71A is disposed as an intermediate position. Is formed. As shown in FIG. 11 and the like, the front side wall portion 78A and the rear side wall portion 79A are also provided with ribs 80A that protrude in directions facing each other. The ribs 80A are provided as an upper holding rib 832, a lower holding rib 822, a connector support rib 81, an upper holding rib 821, and a lower holding rib 831 in order from the top. These ribs 80A function in the same manner as in the first embodiment described above, and act to maintain the arrangement state of the next isolation member 85A.
Even in the isolation member 85A, the isolation member 85A is formed to have a substantially symmetric structure such that the position where the connector 71A is disposed is an intermediate position and has a vertical mirror structure, like the isolation member 85 of the above-described first embodiment. To work. That is, the separating member 85A is generally disposed so as to block the interposition member 86A that is mainly disposed so as to fill a gap formed between the partition wall portion 76A and the left housing 201, and an opening portion for drawing out the lead wire L. The first closing member 87A and the second closing member 88A are composed of three members. The intervening member 86A of this embodiment also has a function of filling the gap formed between the partition wall portion 76A and the left housing 201 and a function of closing an opening for drawing out the lead wire L. ing.

As shown in FIG. 10, the interposed member 86 </ b> A has an inverted U shape when viewed in the front-rear direction. That is, the interposing member 86A is provided with a closing portion 865 ′ on the upper side of the interposing member 86 of the first embodiment described above. That is, the interposition member 86A of the second embodiment includes an interposition portion 861A that extends substantially in the vertical direction, and blocking portions 865A and 865 ′ that are connected at the lower and upper portions of the interposition portion 861A and extend substantially in the left-right direction. . The interposition part 861A and the blocking parts 865A and 865 ′ are integrally formed of a soft elastic resin material, and are formed as an integral part. The interposition part 861A and the lower closing part 865A are formed in substantially the same manner as the interposition part 861 and the closing part 865 in the first embodiment described above. Even in the upper closing portion 865 ′, the lower closing portion 865A is formed so as to be symmetrical. For this reason, even if it exists in this lower side obstruction | occlusion part 865A and upper side obstruction | occlusion part 865 ', it functions substantially the same as the obstruction | occlusion part 865 of above-mentioned 1st Embodiment. In the intervening member 86A and the blocking members 87A and 88A, portions that function in substantially the same manner as in the first embodiment described above are denoted by “A” at the end of the reference numerals described in the first embodiment. The reference numerals to which are added are attached to the drawings, and the description thereof is omitted.
Note that the closing portion 865 ′ and the upper closing member 88A of the interposing member 86A in the second embodiment are not provided with a structure that acts like the pressing portions 203 and 207 to be pressed. Further, only two of the first lead wires 721 from the connector 71A are passed through the lower closing portion 865A. Similarly, only two of the first lead wires 722 from the connector 71A are also inserted into the upper closing portion 865 ′. Not penetrated.

  According to the partition portion 75A of the second embodiment configured as described above, it is possible to achieve substantially the same operational effects as the partition portion 75 of the first embodiment described above. That is, according to the partition part 75A, the inside of the grip housing part 25A and the arrangement part 710A of the connector 71A can be partitioned, and the four directions on the left side on the front rear side right side other than the lower side upper side from which the lead wire L is drawn out can be divided. The grip housing portion 25A including the partition wall portion 76A and the interposed member 86A can be closed. Further, the lower upper side from which the lead wire L is drawn can be closed by a closing member 87A supported by the grip housing portion 25A. As a result, water and dust can be prevented from entering the connector 71A provided in the intermediate portion of the lead wire L. Accordingly, the waterproof and dustproof function for the connector 71A disposed inside the grip housing portion 25A can be enhanced. Since the lead wire L drawn out from the connector 71A arranged at the arrangement portion 710A matches the arrangement direction of the connected controller 15 and the electric motor 32, the length of the lead wire L to be wired is long. The length can be shortened. Thereby, the wiring inside the tool main body 100 can be simplified.

In addition, in the electric tool and electric tool which concern on this invention, it is not limited to the structure of the impact driver 10 of above-described embodiment, It is an appropriate electric tool comprised using an electric motor as a drive source. Can be applied. For example, the power tool according to the present invention may be configured by a driver drill, an angle drill, a shear, a reciprocating saw, or the like. Further, the electric wire intermediate electric structure according to the present invention is not limited to the connector 71 of the above-described embodiment, and may be constituted by an appropriate electric member or electric structure. Further, the drawing direction of the electric wire according to the present invention is not limited to the drawing direction of the lead wire L described above, and may be any direction of up, down, front, back, left and right. However, since the grip housing portion 25 is structured to be assembled in the left-right direction, the direction intersecting with the assembled direction is easier in wiring. Moreover, as a division part which concerns on this invention, it does not necessarily need to be provided integrally with the housing which makes the exterior of a tool, and may be provided separately from this housing. Moreover, as a division | segmentation aspect of a housing, it may be comprised by the suitable crack aspect, without being limited to the above-mentioned half-split structure. Further, the partition wall portion according to the present invention is not limited to the configuration in which the partition wall portion is provided only on one side of the housing as in the above-described embodiment, and the configuration in which the partition wall portions are provided on both sides of the housing. It may be. In addition, the configuration of the partition wall portion is not limited to the above-described embodiment, and it is only necessary to have a configuration that slightly surrounds the arrangement site according to the present invention. It is not limited.
Moreover, even if it exists in the sealing member which concerns on this invention, it may be comprised by the separate component shape | molded suitably, without being limited to above-described embodiment. For example, the sealing member according to the present invention may be a member having a slight adhesiveness. Specifically, it may be replaced with a resin such as an adhesive having appropriate tackiness such as a bond. Moreover, even if it exists in the elastic member which concerns on this invention, it may be comprised by the separate component shape | molded suitably, without being limited to above-described embodiment. For example, the elastic member according to the present invention may be a member having even a slight elasticity, and can be replaced with a foam molding resin having elasticity such as an appropriate sponge or natural rubber having appropriate elasticity. It may be. In addition, such a sealing member or elastic member may be provided so as to cover the outer periphery of the electric wire, and may be by simple winding or the like. Moreover, when improving this waterproof and dustproof function, you may serve as the function which has the buffer function as a normal coating | coated member. In addition, the above-described electric intermediate electrical structure may be an appropriate electrical structure such as a capacitor, a fuse, a diode, a choke coil, a signal line from a sensor, or a power line as appropriate.

10 Impact driver (electric tool)
100 Tool body 15 Controller 17 Communication terminal 20 Exterior housing 201 Left housing (first divided housing)
202 Inner peripheral surface 203 Pressing portion 205 Right housing (second divided housing)
206 Inner peripheral surface 207 Pressing portion 21 Motor housing portion 25 Grip housing portion 26 Covering grips 28 and 29 Screw fastening portion 30 Drive output portion 31 Electric motor portion 32 Electric motor (motor)
33 Stator 34 Rotor 35 Motor shaft 36 Cooling fan 361 Front bearing 362 Rear bearing 37 Front cover 38 Rear cap 39 Motor circuit board 41 Drive conversion mechanism 42 Gear case 421 Front gear case 422 Bearing box 43 Reduction mechanism 44 Sun gear 45 Planet Gear train 46 Internal gear 51 Stroke mechanism 52 Intermediate shaft 53 Biasing spring 54 Hammer 55 Strike piece 56 Needle bearing 57 Anvil 58 Irradiation device 59 Bearing 60 Grip portion 65 Drive switch 66 Switch body 67 Operation trigger 68 Rotation direction switch button 70 Wiring Structure 71 Connector (intermediate electric cable structure)
710 Connector location (location)
721 First lead wire (first electric wire)
722 Second lead wire (second wire)
73 Female Connector 731 Female Fitting Portion 732 Female Hook Portion 74 Male Connector 741 Male Fitting Portion 742 Male Hook Portion 75 Partition (Intrusion Restricting Member)
76 Partition wall portion 77 Upper side wall portion 78 Front side wall portion 79 Rear side wall portions 771, 781, 791 Left end 80 Rib 81 Connector support rib 82 Upper holding rib 83 Lower holding rib 85 Isolation member (seal member, elastic member)
86 Interposing member 861 Interposing portion 862 Outer peripheral portion 863 Inner peripheral portion 865 Closure portion 866 Contact surface 867 Pressure receiving portion 868 Through hole 87 Closure member 871 Contact surface 872 Outer peripheral portion 873 Pressure receiving portion 90 Battery attachment portion 91 Rechargeable battery 99 Hook tool B Driver bit (processing tool)
L Lead wire (electric wire)

Claims (1)

A motor housing portion that houses the motor and has an intake hole and an exhaust hole ;
A grip housing portion disposed below the motor housing portion;
A switch body disposed in the grip housing portion;
An electrical intermediate structure provided below the switch body and provided between the first electric wire and the second electric wire;
An arrangement portion provided inside the grip housing portion, for arranging the electric wire intermediate electrical structure;
A partition portion that partitions the placement portion and the inside of the grip housing portion other than the placement portion;
The partition has upper, lower, front, rear, right, left walls,
The first electric wire and the second electric wire are drawn from below the partition part, and the second electric wire is electrically connected to a controller .

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