JP6525394B2 - Electric tool - Google Patents

Description

  The present invention relates to a power tool that uses a motor as a drive source.

  There are known small power tools such as impact drivers and impact wrenches that use a brushless motor as a drive source. In this type of power tool, a hammer rotationally driven by a brushless motor strikes an anvil to rotate a tip tool attached to the anvil. This makes it possible to perform operations such as fastening fasteners. An electric power tool using a brushless motor can miniaturize the tool main body, and by soldering the stator coil to a substrate for driving the motor, the brushless motor is electronically controlled, so that good work can be performed. It has the advantages of high quality and low power consumption. On the other hand, since the vibration generated when the hammer strikes the anvil is transmitted to the motor and the substrate through the housing, there has been a problem that peeling of the mounted element due to bending of the substrate, disconnection of the coil and the like occur.

  In order to solve the above-mentioned problem, conventionally, a power tool in which a coil and a substrate are connected via a connector is used (see, for example, Patent Document 1 below). Here, the connection state of the motor and the substrate in the conventional electric power tool will be described based on FIG. 15 and FIG. FIG. 15 is a perspective view showing a partial configuration of a motor in the conventional power tool, and FIG. 16 is a side view showing a partial configuration of the motor in the conventional power tool.

  A stator 633 constituting the motor 603 has a substantially cylindrical shape, and an insulator 637 is disposed at an axial end of the stator 633. The insulator 637 has a substantially cylindrical base 637 a and insulates the stator 633 from the coil 635. Further, a plurality of substrate positioning portions 637 f for positioning the substrate 606 are provided on the base portion 637 a of the insulator 637 so as to protrude in the axial direction of the stator 633. Further, the base portion 637a of the insulator 637 is provided with a plurality of connector support portions 637h projecting in the axial direction of the stator 633, and the connector 639 engages with and is supported by the connector support portion 637h.

  The connector 639 has an engaging portion 639a engaged with the connector support portion 637h of the insulator 637, a protruding portion 639b protruding in the axial direction of the stator 633, and an inclined portion 639c inclined in the radial direction of the stator 633. The projecting portion 639 b is a portion connected to the substrate 606, and the inclined portion 639 c is a portion to which the coil 635 is wound and connected.

  The substrate 606 is disposed to cover the insulator 637 and the connector 639, and is positioned by the positioning portion 637f of the insulator 637. Further, a plurality of holes (not shown) are formed in the substrate 606, and the protrusions 639b of the connector 639 fit into the holes. The fitting portion between the protrusion 639 b of the connector 639 and the hole of the substrate 606 is fixed by soldering.

  As described above, in the conventional power tool, the coil is connected to the substrate through the connector fixed by soldering to the substrate.

JP 02-079760 A

  By the way, in recent years, a small-sized power tool with a large output is required. However, in the case of a power tool with a large output, the generated vibration is also large, and therefore, even when the coil and the substrate are connected through the connector, there are problems such as bending of the substrate, disconnection of the coil, and detachment of the soldered connector. It was happening.

  In view of such problems, the present invention has an object to provide an electric power tool capable of suppressing the occurrence of bending of a substrate due to the transmission of vibration without increasing the size of the tool body even in the case of an electric power tool having a large output. .

In order to solve the above problems, an electric power tool according to the present invention includes a substrate, a motor connected to the substrate, a motor storage unit for storing the motor, and an output unit driven by the motor. And a substrate support portion for supporting the substrate, the substrate support portion being disposed between the insulator and the substrate, the insulator being connected to the stator to insulate the stator and the coil from each other. A connector connected to the coil and supporting the substrate, wherein the first elastic body is disposed between the connector and the substrate on a vibration transmission path from the output portion to the substrate via the motor It features.
Further, the electric power tool according to the present invention includes a substrate, a motor connected to the substrate, a motor storage unit for storing the motor, and an output unit driven by the motor, and the motor is a stator on which a coil is wound. And a substrate support portion for supporting the substrate, wherein the substrate support portion is connected to the stator to insulate the stator from the coil, and is disposed between the insulator and the substrate to connect to the coil and the substrate A first elastic body disposed on the vibration transmission path from the output portion to the substrate via the motor, between the insulator and the connector.
Furthermore, the electric power tool according to the present invention includes a substrate, a motor connected to the substrate, a motor storage unit for storing the motor, and an output unit driven by the motor, and the substrate is stored in the motor storage unit. The elastic member is supported on a vibration transmission path from the output portion to the substrate via the motor housing portion, between the motor housing portion and the substrate. Is placed.
Further, in order to solve the above problems, the electric power tool according to the present invention includes a substrate, a motor connected to the substrate, a motor storage unit for storing the motor, and an output unit driven by the motor. An elastic body is disposed on a vibration transmission path from the output portion to the substrate.

  According to this configuration, the vibration isolation effect of the elastic body makes it possible to suppress the transmission of the vibration generated at the output section to the substrate. Therefore, the occurrence of the bending of the substrate can be suppressed without increasing the size of the tool body.

  In the power tool described above, the vibration transmission path is formed to reach the substrate from the output unit via the motor. In this case, the elastic body is preferably disposed between the motor and the substrate.

  According to this configuration, the elastic body can suppress transmission of the vibration generated in the output section and transmitted to the motor to the substrate, so that the occurrence of bending of the substrate, disconnection of the coil, or the like can be suppressed.

  The motor preferably includes a stator around which the coil is wound, and an insulator connected to the stator to insulate the stator from the coil, and the elastic body is preferably disposed between the stator and the insulator.

  According to this configuration, the transmission of the vibration from the stator to the insulator can be suppressed, so that the occurrence of the disconnection of the coil in the vicinity of the insulator can be suppressed. In addition, since transmission of vibration to the substrate is suppressed, it is possible to suppress the occurrence of bending of the substrate.

  The motor preferably includes a stator on which the coil is wound, and a substrate support that supports the substrate, and the elastic body is preferably disposed between the substrate support and the substrate.

  According to this configuration, the transmission of the vibration from the substrate support portion to the substrate can be suppressed, so that the occurrence of the bending of the substrate can be suppressed.

  The substrate support portion preferably includes an insulator connected to the stator to insulate the stator and the coil, and the elastic body is preferably disposed between the insulator and the substrate.

  According to this configuration, the transmission of the vibration from the insulator to the substrate can be suppressed, so that the generation of the bending of the substrate can be suppressed.

  The substrate support includes an insulator connected to the stator to insulate the stator from the coil, and a connector disposed between the insulator and the substrate to connect to the coil and support the substrate, and the elastic body is a connector Preferably, it is disposed between the substrate.

  According to this configuration, the transmission of the vibration from the connector to the substrate can be suppressed, so that the occurrence of the bending of the substrate can be suppressed. Moreover, it becomes possible to suppress the detachment of the connector from the substrate.

  The substrate support includes an insulator connected to the stator to insulate the stator from the coil, and a connector disposed between the insulator and the substrate to connect to the coil and support the substrate, and the elastic body is the insulator Preferably, it is disposed between the connector and the connector.

  According to this configuration, since transmission of vibration from the insulator to the connector can be suppressed, occurrence of disconnection of the coil in the vicinity of the connector and detachment of the connector from the substrate can be suppressed. In addition, since transmission of vibration to the substrate is suppressed, it is possible to suppress the occurrence of bending of the substrate.

  In the power tool described above, the connector is preferably a signal terminal.

  According to this configuration, since transmission of signals to the substrate can be performed while suppressing transmission of vibration from the connector to the substrate, generation of bending of the substrate can be suppressed without impairing the workability of the tool.

  In the above-described electric power tool, the vibration transmission system is a path from the output portion to the substrate via the motor housing portion and the motor. In this case, the elastic body is preferably disposed between the motor housing and the motor.

  According to this configuration, the elastic body can suppress transmission of the vibration generated at the output portion and transmitted to the motor housing portion to the motor, so that occurrence of disconnection of the motor coil can be suppressed. In addition, since transmission of vibration to the substrate is suppressed, it is possible to suppress the occurrence of bending of the substrate.

  The motor preferably includes a stator on which the coil is wound, and a substrate support that supports the substrate, and the elastic body is preferably disposed between the motor housing and the stator.

  According to this configuration, since transmission of vibration from the motor housing portion to the stator can be suppressed, generation of disconnection of the coil wound around the stator can be suppressed and prevented. In addition, since transmission of vibration to the substrate is suppressed, it is possible to suppress the occurrence of bending of the substrate.

  In the power tool described above, the vibration transmission path is formed to reach the substrate from the output unit via the motor. In this case, the elastic body is preferably disposed in the motor.

  According to this configuration, the elastic body can suppress the transmission of the vibration generated in the output unit in the motor, and therefore, the occurrence of the disconnection of the motor coil can be suppressed. In addition, since transmission of vibration to the substrate is suppressed, it is possible to suppress the occurrence of bending of the substrate.

  The motor preferably includes a stator on which the coil is wound and a substrate support that supports the substrate, and the elastic body is preferably disposed between the stator and the substrate support.

  According to this configuration, the transmission of the vibration from the stator to the substrate support can be suppressed, so that the occurrence of wire breakage in the vicinity of the substrate support can be suppressed. In addition, since transmission of vibration to the substrate is suppressed, it is possible to suppress the occurrence of bending of the substrate.

  The motor preferably includes a stator on which the coil is wound and a substrate support that supports the substrate, and the elastic body is preferably disposed in the substrate support.

  According to this configuration, the transmission of the vibration generated in the output unit can be suppressed in the substrate support unit, so that the occurrence of the disconnection of the coil in the vicinity of the substrate support unit can be suppressed. In addition, since transmission of vibration to the substrate is suppressed, it is possible to suppress the occurrence of bending of the substrate.

  The substrate support includes an insulator connected to the stator to insulate the stator from the coil, and a connector disposed between the insulator and the substrate to connect to the coil and support the substrate, and the elastic body is the insulator Preferably, it is disposed between the connector and the connector.

  According to this configuration, since transmission of vibration from the insulator to the connector can be suppressed, generation of wire breakage in the vicinity of the connector and detachment of the connector from the substrate can be suppressed. In addition, since transmission of vibration to the substrate is suppressed, it is possible to suppress the occurrence of bending of the substrate.

  The substrate support portion is disposed between an insulator connected to the stator to insulate the stator from the coil, an insulator connected to the stator to insulate the stator from the coil, disposed between the insulator and the substrate to connect the coil and supporting the substrate And the elastic body is preferably a connector.

  According to this configuration, vibration is absorbed in the connector, and transmission of vibration from the connector to the substrate can be suppressed, so that occurrence of bending of the substrate, disconnection of the coil, detachment of the connector from the substrate, or the like can be suppressed. .

  Preferably, one end of the connector is connected to the insulator, and the other end of the connector is an elastic body that supports the substrate.

  According to this configuration, the vibration is absorbed in the portion of the connector that supports the substrate, so transmission of the vibration to the substrate can be suppressed. Therefore, it becomes possible to suppress the occurrence of bending of the substrate and the detachment of the connector from the substrate.

  In the above-described electric power tool, the vibration transmission path is formed so as to reach the substrate from the output portion through the motor housing portion. In this case, the elastic body is preferably disposed between the motor housing and the substrate.

  According to this configuration, the transmission of the vibration from the motor housing to the substrate can be suppressed, so that the occurrence of the bending of the substrate can be suppressed.

  In the power tool described above, the motor includes a stator on which a coil is wound, an insulator connected to the stator to insulate the stator and the coil, a connector disposed between the insulator and the substrate for connecting the coil and supporting the substrate , And the vibration transmission path is preferably formed to reach the substrate from the output portion through the motor housing portion, the stator, the insulator, and the connector.

  According to this configuration, transmission of vibration from the output section to the substrate along the vibration transmission path can be suppressed, so that occurrence of bending of the substrate, disconnection of the coil, detachment of the connector from the substrate, etc. can be suppressed. It becomes.

  An electric power tool according to another aspect of the present invention includes a substrate, a motor connected to the substrate, a motor storage unit for storing the motor, and an output unit driven by the motor, and the output unit through the motor A vibration transmission path leading to the substrate is formed, and the elastic body is disposed on the vibration transmission path of the component constituting the motor.

  According to such a configuration, it is possible to suppress that the vibration generated at the output section is transmitted to the substrate through the motor by the vibration isolation effect of the elastic body. Therefore, the occurrence of the bending of the substrate can be suppressed without increasing the size of the tool body.

  In the power tool described above, the motor includes a stator on which a coil is wound, an insulator connected to the stator to insulate the stator and the coil, a connector disposed between the insulator and the substrate and connected to the coil and supporting the substrate It is preferable to have.

  According to this configuration, it is possible to suppress the occurrence of coil breakage or the like in the motor, and to suppress the transmission of vibration to the substrate, so it is possible to suppress the occurrence of bending of the substrate.

  The elastic body is preferably disposed between the motor housing and the stator.

  According to this configuration, the transmission of the vibration from the motor housing portion to the stator can be suppressed, so that the occurrence of the disconnection of the coil wound on the stator can be suppressed. Further, since transmission of vibration to the substrate can be suppressed, generation of bending of the substrate can be suppressed.

  The elastic body is preferably disposed between the stator and the insulator.

  According to this configuration, the transmission of the vibration from the stator to the insulator can be suppressed, so that the occurrence of the disconnection of the coil in the vicinity of the insulator and the connector can be suppressed. Further, since transmission of vibration to the substrate can be suppressed, generation of bending of the substrate can be suppressed.

  The elastic body is preferably disposed between the insulator and the connector.

  According to this configuration, the transmission of the vibration from the insulator to the connector can be suppressed, so that the occurrence of the disconnection of the coil connected to the connector can be suppressed. In addition, since transmission of vibration to the substrate can be suppressed, it is possible to suppress the occurrence of bending of the substrate, detachment of the connector from the substrate, and the like.

  The elastic body is preferably disposed between the insulator and the substrate.

  According to this configuration, the transmission of the vibration from the insulator to the substrate can be suppressed, so that the generation of the bending of the substrate can be suppressed.

  The elastic body is preferably disposed between the connector and the substrate. In this case, the connector is preferably a signal terminal.

  According to this configuration, the transmission of vibration from the connector to the substrate can be suppressed, so that the occurrence of bending of the substrate, detachment of the connector from the substrate, or the like can be suppressed. Moreover, since transmission of a signal is possible, suppressing transmission of vibration from a connector to a board | substrate, it becomes possible to suppress generation | occurrence | production of bending of a board | substrate, without impairing the workability of a tool.

  The elastic body is preferably a connector.

  According to this configuration, the vibration is absorbed in the connector, and the transmission of the vibration from the connector to the substrate can be suppressed, so that the occurrence of bending of the substrate, disconnection of the coil, or the like can be suppressed.

  Preferably, one end of the connector is connected to the insulator, and the other end of the connector is an elastic body that supports the substrate.

  According to this configuration, the vibration is absorbed in the portion of the connector that supports the substrate, so transmission of the vibration to the substrate can be suppressed. Therefore, the occurrence of the bending of the substrate can be suppressed.

  A power tool according to still another aspect of the present invention includes a substrate, a motor connected to the substrate, a motor having a stator, a motor housing unit for housing the motor, and an output unit driven by the motor. An elastic body is disposed between the substrate and the substrate.

  According to this configuration, the vibration isolation effect of the elastic body makes it possible to suppress the transmission of the vibration generated at the output section to the substrate. Therefore, the occurrence of the bending of the substrate can be suppressed without increasing the size of the tool body.

  ADVANTAGE OF THE INVENTION According to the electric tool which concerns on this invention, transmission of the vibration to a board | substrate can be suppressed and generation | occurrence | production of bending of a board | substrate can be suppressed.

It is a sectional view showing the composition of the impact wrench concerning the present invention. It is a figure which shows the support part of the motor in the impact wrench which concerns on 1st Embodiment, and is AA sectional drawing of FIG. It is the perspective view which shows the partial structure of the motor in the impact wrench which concerns on 1st Embodiment, and the elements on larger scale which show the engagement part of a connector and an insulator. (A) is a perspective view of a motor, (b) is an enlarged view of a part shown by B in (a). FIG. 2A is a side view and a partial enlarged view showing a partial configuration of a motor in the impact wrench according to the first embodiment. (A) is a side view of a motor, (b) is CC sectional drawing of (a). It is a figure which shows the connection part of the connector and circuit board in the impact wrench which concerns on 1st Embodiment. It is the schematic which shows the structure of the circuit board in the impact wrench which concerns on 1st Embodiment. (A) is a top view which shows the whole circuit board, (b) is an enlarged view of the part shown by D to (a). It is the perspective view which shows the partial structure of the motor in the impact wrench which concerns on 2nd Embodiment, and the elements on larger scale which show the engagement part of a connector and an insulator. (A) is a perspective view of a motor, (b) is an enlarged view of a part shown by E in (a). It is a side view and a partial enlarged view showing a partial configuration of a motor in an impact wrench according to a second embodiment. (A) is a side view of a motor, (b) is FF sectional drawing of (a). It is a figure which shows the structure of the electrically conductive rubber in the impact wrench which concerns on 3rd Embodiment, and a connector. (A) is a figure which shows the structure of electrically conductive rubber, (b) is a figure which shows the engagement part of electrically conductive rubber and a connector. (C) is a figure which shows the connection part of a conductive rubber, a connector, and a circuit board, (d) is a figure which shows the engagement part of a connector and an insulator. It is the schematic which shows the structure of the circuit board in the impact wrench which concerns on 3rd Embodiment. (A) is a top view which shows the whole circuit board, (b) is an enlarged view of the part shown by G by (a). It is a figure showing composition of a connector in an impact wrench concerning a 4th embodiment. (A) is a figure which shows the connection part of a connector and a circuit board, (b) is a figure which shows the engagement part of a connector and an insulator. It is a figure which shows the connection part of the housing and motor in the impact wrench which concerns on 5th Embodiment, and is AA sectional drawing of FIG. It is sectional drawing which shows the structure of the impact wrench which concerns on 6th Embodiment. It is a figure which shows the support part of the circuit board in the impact wrench which concerns on 6th Embodiment, and is an enlarged view of the part shown by H in FIG. It is a perspective view which shows the partial structure of the motor in the conventional electric tool. It is a side view which shows the partial structure of the motor in the conventional electric tool.

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. Here, the case where the present invention is applied to an impact wrench is described as an example.

  FIG. 1 is a cross-sectional view showing the structure of an impact wrench 1 according to the present invention. The impact wrench 1 is comprised including the housing 2, the motor 3, the gear mechanism 4, the output part 5, the circuit board 6, the control part 7, and the power supply cord 8, as FIG. 1 shows.

  The outer shell of the impact wrench 1 is composed of a housing 2 made of resin and a cover 21 made of resin that covers the output section 5. A metal hammer case 22 is housed in the cover 21. The housing 2 corresponds to a motor accommodating portion of the present invention, and is constituted of a body portion 2a, a handle portion 2b and a substrate accommodating portion 2c. The body portion 2a has a substantially cylindrical shape, and cooperates with the cover 21 and the hammer case 22 to accommodate the motor 3, the gear mechanism 4 and the output portion 5 in that order. In the following description, the output unit 5 is defined as the front side, and the motor 3 side is defined as the rear side. Further, the direction in which the handle portion 2b extends with respect to the body portion 2a is defined as the lower side, and the reverse is defined as the upper side.

  The rear end face of the body 2a of the housing 2 is formed with an unshown intake port for sucking outside air, and the body 2a located outside the cooling fan 34 described later is provided in the body 2a. An exhaust port (not shown) is formed to discharge the sucked outside air. The motor 3 and the circuit board 6 are cooled by the outside air.

  The handle portion 2b extends downward from a substantially central position in the front-rear direction of the body portion 2a, and is configured integrally with the body portion 2a. A switch mechanism 23 is built in the inside of the handle portion 2b, and a power supply cord 8 connectable to a commercial AC power supply extends at the end position in the extension direction. In the handle portion 2b, a trigger 24 serving as an operation place of the operator is provided at the root portion from the body portion 2a and at the front position. The trigger 24 is connected to the switch mechanism 23 and is used to switch between supply and disconnection of drive power to the motor 3 and to switch the rotation direction of the motor 3. The trigger 24 of the present embodiment is a tumbler switch.

  The substrate accommodation portion 2c protrudes forward from the lower end position of the handle portion 2b, and is configured integrally with the handle portion 2b. The control unit 7 is accommodated inside the substrate accommodation unit 2c. Further, an operation panel 25 is provided on the upper surface of the substrate housing portion 2c.

  The motor 3 is a brushless motor, and includes an output shaft 31, a rotor 32, and a stator 33, as shown in FIG. The output shaft 31 is disposed in the body 2a so that the axial direction coincides with the longitudinal direction, and protrudes in the front and rear of the rotor 32 and is rotatably supported by the body 2a by a bearing at the protruding point. . In the output shaft 31, a cooling fan 34 that rotates coaxially and integrally with the output shaft 31 is provided at a portion that protrudes to the front side. The rotor 32 is fixed to the output shaft 31 and has a plurality of permanent magnets (not shown). The stator 33 includes a plurality of coils 35 and is arranged to surround the rotor 32. The detailed configuration of the motor 3 will be described later.

  The gear mechanism 4 is a reduction gear mechanism configured by a planetary gear mechanism including a plurality of gears, and decelerates the rotation of the output shaft 31 and transmits it to the output unit 5.

  The output unit 5 includes a hammer 51 and an anvil 52 disposed in front of the hammer 51. The hammer 51 and the anvil 52 are each rotatably disposed. At the front end of the anvil 52, a mounting portion 53 for mounting a tip tool is provided.

  The hammer 51 has a collision part 51a at its front end, and the anvil 52 has a collision target part 52a at its rear end. Further, the hammer 51 is urged forward by the spring 54 so that the colliding portion 51a collides with the colliding portion 52a in the rotational direction when it is rotated. With such a configuration, when the hammer 51 rotates, the anvil 52 is struck.

  The hammer 51 is configured to be movable rearward against the biasing force of the spring 54. Normally, since the collision part 51a of the hammer 51 and the collided part 52a of the anvil 52 are engaged, the rotation of the motor 3 is transmitted to the anvil 52 through the gear mechanism 4 and the hammer 51, and the hammer 51 and anvil By rotating integrally with 52 and rotating a tip tool (not shown) attached to the attachment portion 53, the fastening work of the fastener is performed. On the other hand, since the load increases at the end of tightening of the fastener, the hammer 51 is locked, and the hammer 51 and the anvil 52 can not integrally rotate. Then, the hammer 51 retreats while rotating against the biasing force of the spring 54. Then, when the colliding portion 51a passes over the colliding portion 52a, the elastic energy stored in the spring 54 is released, and the hammer 51 moves forward, and the colliding portion 51a and the colliding portion 52a collide. . By this repetition, the tightening operation can be performed even when the anvil 52 rotates little by little and the load is large.

  In the present embodiment, the circuit board 6 is a board on which a switching element 61 such as a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) or an IGBT (Insulated Gate Bipolar Transistor) is mounted. The circuit board 6 corresponds to the board of the present invention.

  The control unit 7 includes a control circuit board 71 which is accommodated in the substrate accommodation unit 2 c and controls the entire impact wrench 1. The control circuit board 71 switches the rotation direction of the motor 3 by operating (pressing) the upper side or the lower side of the trigger 24 with the vertically middle portion as a fulcrum. The rotational speed of the motor 3 can also be controlled by adjusting the amount of power supplied to the motor 3 in accordance with the amount of operation of the trigger 24. The operator can set the operation speed and the like of the impact wrench 1 by operating the operation panel 25.

  The power supply cord 8 supplies power to each part by being connected to a commercial AC power supply.

  Subsequently, the detailed configuration of the motor 3 in the impact wrench 1 according to the first embodiment will be described. FIG. 2 is a view showing a support portion of the motor 3 in the impact wrench 1 according to the present invention, and is a cross-sectional view taken along the line AA of FIG. Only the left half of the cross-sectional view is shown in FIG. In the following description, the axial direction refers to the axial direction of the stator 33, and the radial direction refers to the radial direction of the stator 33.

  The stator 33 has a substantially cylindrical shape, and as shown in FIG. 2, six protrusions (teeth portions) 33 a are arranged in the circumferential direction so as to protrude radially inward on the inner peripheral portion thereof. It is provided. Further, on the outer peripheral portion of the stator 33, four convex portions 33b protruding outward in the radial direction are provided. In the body portion 2 a of the housing 2, a plurality of ribs 28 are provided in a protruding manner, and the respective projections 33 b of the stator 33 are supported by the plurality of ribs 28, whereby the stator 33 is fixed in the housing 2.

  Fig.3 (a) is a perspective view which shows the partial structure of the motor 3 in the impact wrench 1 which concerns on 1st Embodiment, FIG.3 (b) is the expansion of the part shown by B in FIG. 3 (a). It is a figure and it is the elements on larger scale which show the engagement part of the connector 39 and the insulator 37. FIG. 4A and 4B are a side view and a partial enlarged view showing a partial configuration of the motor 3 in the impact wrench 1 according to the first embodiment, and FIG. 4A shows a side view of the motor 3. (B) is CC sectional drawing of Fig.4 (a).

  On the axial rear surface of the stator 33, as shown in FIG. 3 and FIG. 4A, the anti-vibration rubber 36 and the insulator 37 are disposed. In addition, the insulator 38 is also disposed on the front surface in the axial direction of the stator 33. The insulator 37 disposed on the rear surface corresponds to the substrate support portion of the present invention.

  The anti-vibration rubber 36 is disposed to cover the entire rear surface of the stator 33 including the projecting portion 33 a. That is, the anti-vibration rubber 36 has a substantially cylindrical base 36 a and six protrusions 36 b arranged in the circumferential direction so as to protrude radially inward from the base 36 a. The base portion 36 a is a portion covering the rear surface of the substantially cylindrical portion of the stator 33, and the projection 36 b is a portion covering the rear surface of the projection 33 a of the stator 33. The anti-vibration rubber 36 is an example of the elastic body of the present invention, and has a function of absorbing vibration.

  The insulator 37 is made of a nonconductive material such as resin, and insulates the coil 35 and the stator 33. The insulator 37 is disposed so as to cover the entire axial rear surface of the stator 33 covered with the anti-vibration rubber 36. That is, the anti-vibration rubber 36 is disposed between the stator 33 and the insulator 37. The insulator 37 has an approximately cylindrical base portion 37a, six coil winding portions 37b arranged in the circumferential direction so as to protrude radially inward from the base portion 37a, and an axial direction at an end of each coil winding portion 37b. And a coil support portion 37c protruding rearward. A coil 35 for generating a magnetic flux is wound around the coil winding portion 37b. The coil support portion 37c supports the coil 35 wound around the coil winding portion 37b.

  The insulator 37 further includes a plurality of coil positioning portions 37 d and a plurality of insulator positioning portions 37 e protruding radially outward on the outer peripheral surface of the base 37 a. As shown in FIG. 4A, the coil 35 drawn from the inside of the stator 33 is wound around the outer peripheral surface of the insulator 37. The coil positioning portion 37 d positions the coil 35 wound around the outer peripheral surface of the insulator 37. The insulator positioning portion 37 e contacts the convex portion 33 b provided on the outer peripheral portion of the stator 33 to position the insulator 37 so that the insulator 37 does not shift in the circumferential direction with respect to the stator 33.

  Further, the insulator 37 is provided on the rear surface in the axial direction of the base portion 37a with four substrate positioning portions 37f projecting rearward in the axial direction and aligned circumferentially, and four substrates projecting backward in the axial direction and radially outward and aligned in the circumferential direction And a positioning portion 37g. The substrate positioning portion 37 f abuts against the front surface of the circuit board 6 in the axial direction, and positions the circuit board 6 in the axial direction. Further, the substrate positioning portion 37g protrudes axially rearward and radially outward from the substrate positioning portion 37f, and abuts on the outer peripheral surface of the circuit board 6 to position the circuit board 6 in the radial direction.

  Furthermore, the insulator 37 has six connector support portions 37 h that project axially rearward and are arranged at substantially equal intervals in the circumferential direction on the axial rear surface of the base 37 a. The connector 39 engages with the connector support 37h.

  The connector 39 is made of a conductive material such as resin, and as shown in FIGS. 3B and 4B, an engaging portion 39a engaged with the connector support portion 37h of the insulator 37, and an axial rear And an inclined portion 39c which is inclined in the radial direction. As shown in FIG. 4A, the protrusion 39b is a portion connected to the circuit board 6 and protrudes rearward in the axial direction. The inclined portion 39 c is a portion where the coil 35 is wound and the connector 39 and the coil 35 are electrically connected. The connector 39 corresponds to the substrate support of the present invention.

  FIG. 5 is a view showing a connection portion between the connector 39 and the circuit board 6 in the impact wrench 1 according to the first embodiment. FIG. 6 is a schematic view showing the configuration of the circuit board 6 in the impact wrench 1 according to the first embodiment. 6 (a) is a plan view showing the entire circuit board 6, and FIG. 6 (b) is an enlarged view of a portion indicated by D in FIG. 6 (a).

  The circuit board 6 has a substantially annular shape with a circular hole 6 a formed at the center, and is disposed on the rear side in the axial direction of the stator 33 covered with the vibration-proof rubber 36 and the insulator 37. The output shaft 31 of the motor 3 is loosely fitted rotatably in the hole 6a.

  Further, as shown in FIG. 6A, the circuit board 6 is formed with six holes 6b aligned in the circumferential direction. The holes 6b have a substantially rectangular shape, and the protrusions 39b of the connector 39 are fitted in the holes 6b. The fitting portion of the hole 6 b and the protrusion 39 b is soldered by the solder 62. In this state, the circuit board 6 and the connector 39 are connected.

  In the impact wrench 1 configured as described above, the hammer 51 and the anvil 52 repeatedly collide in the output portion 5 when the fastening work of the fastener is performed. At the time of the collision, vibration is generated with the output unit 5 as a vibration source and is transmitted to each unit. A vibration transmission path through which the vibration generated at the output unit 5 is transmitted is indicated by an arrow P in FIG. The vibration transmission path P extends from the output unit 5 to the circuit board 6 via the body 2 a of the housing 2, the stator 33, the insulator 37 and the connector 39. That is, the vibration generated in the output unit 5 is transmitted to the circuit board 6 via the housing 2, the stator 33, the insulator 37 and the connector 39.

  Here, in the impact wrench 1 of the present embodiment, as shown in FIG. 3A and FIG. 4A, the anti-vibration rubber 36 is disposed between the stator 33 and the insulator 37. The anti-vibration rubber 36 absorbs the vibration transmitted from the output unit 5 through the housing 2 and the stator 33 because it has a vibration absorbing function, and the amount of the vibration transmitted to the insulator 37, the connector 39 and the circuit board 6 is Reduce. As a result, the amount of transmission of the vibration generated in the output unit 5 to the circuit board 6 is reduced, so that the circuit board 6 is bent and the switching element 61 is peeled off, or the connector 39 is detached from the circuit board 6 Can be suppressed. Further, since the amount of transmission of vibration to the coil 35 wound around the outer peripheral surface of the insulator 37 and the inclined portion 39c of the connector 39 is also reduced, it is possible to prevent the coil 35 from being broken.

  As described above, in the present embodiment, the vibration-proof rubber 36 is disposed between the stator 33 and the insulator 37 on the vibration transmission path P leading to the circuit board 6 with the output unit 5 as the vibration source. Transmission of vibration to each part located downstream of the stator 33 on the path P can be suppressed. Therefore, without increasing the size of the tool body, it is possible to suppress the occurrence of bending of the circuit board 6 or disconnection of the coil 35 due to the transmission of vibration.

  Next, an impact wrench according to a second embodiment will be described. The impact wrench according to the present embodiment is different from the impact wrench 1 according to the first embodiment in the configuration in which the anti-vibration rubber 136 is disposed between the insulator 37 and the connector 39 in the motor 103. In the following description, the same members as those in the first embodiment are assigned the same reference numerals and descriptions thereof will be omitted.

  Fig.7 (a) is a perspective view which shows the partial structure of the motor 103 in the impact wrench which concerns on 2nd Embodiment, FIG.7 (b) is an enlarged view of the part shown by E in FIG. 7 (a). FIG. 16 is a partially enlarged view showing the engagement portion between the connector 39 and the insulator 37. 8A and 8B are a side view and a partial enlarged view showing a partial configuration of the motor 103 in the impact wrench according to the second embodiment, and FIG. 8A shows a side view of the motor 103. b) is a cross-sectional view taken along the line F-F in FIG.

  In the motor 103, as shown in FIGS. 7B and 8B, anti-vibration rubber 136 is disposed between the insulator 37 and the connector 39. The anti-vibration rubber 136 is formed in a U-shape having a bottom surface, and is disposed in the connector support portion 37 h of the insulator 37 so as to cover the entire portion where the engaging portion 39 a of the connector 39 abuts. That is, the anti-vibration rubber 136 is disposed between the insulator 37 and the connector 39. The anti-vibration rubber 136 is an example of the elastic body of the present invention, and has a function of absorbing vibration.

  In the impact wrench according to the second embodiment configured as described above, in addition to the anti-vibration rubber 36 disposed between the stator 33 and the insulator 37 on the vibration transmission path P (FIG. 1), Anti-vibration rubber 136 is also disposed between insulator 37 and connector 39. Therefore, the vibration generated by the output unit 5 as the vibration source and the vibration transmitted to the housing 2 and the stator 33 is absorbed by the anti-vibration rubber 36, and the amount of transmission of the vibration to the insulator 37 is reduced. The amount of transmission of vibration absorbed by the rubber 136 from the insulator 37 to the connector 39 is reduced. Thereby, the amount of transmission of the vibration generated in the output unit 5 to the circuit board 6 is further reduced, so that the effect of preventing the bending of the circuit board 6, the peeling of the switching element 61, and the falling of the connection portion of the connector 39 Be improved. Further, the effect of suppressing the disconnection of the coil 35 wound around the inclined portion 39c of the connector 39 is further improved.

  In the present embodiment, in addition to the anti-vibration rubber 36 disposed between the stator 33 and the insulator 37, the anti-vibration rubber 136 is disposed between the insulator 37 and the connector 39, but the present invention It is not limited to. It is also possible to dispose the anti-vibration rubber 36 only between the insulator 37 and the connector 39 without arranging the anti-vibration rubber 36 between the stator 33 and the insulator 37. Also in this case, the amount of vibration transmitted from the insulator 37 to the circuit board 6 through the connector 39 is reduced, so that occurrence of bending of the circuit board 6 or disconnection of the coil 35 due to transmission of vibration can be suppressed. It becomes.

  Further, it is possible to dispose anti-vibration rubber between the substrate positioning portions 37 f and 37 g of the insulator 37 and the circuit board 6. In this case, the amount of vibration directly transmitted from the insulator 37 to the circuit board 6 without the connector 39 is reduced. Therefore, the effect of suppressing and preventing the bending of the circuit board 6 can be further improved.

  Next, an impact wrench according to a third embodiment will be described. The impact wrench according to the present embodiment differs from the impact wrench 1 according to the first embodiment in the configuration in which the conductive rubber 236 is disposed between the connector 39 and the circuit board 6. In the following description, the same members as those in the first embodiment are assigned the same reference numerals and descriptions thereof will be omitted.

  FIG. 9 is a view showing the configuration of the conductive rubber 236 and the connector 39 in the impact wrench according to the third embodiment. FIG. 9A is a view showing the configuration of the conductive rubber 236, and FIG. 9B is a view showing an engagement portion between the conductive rubber 236 and the connector 39. As shown in FIG. 9 (c) is a view showing a connection portion of the conductive rubber 236, the connector 39 and the circuit board 6, and FIG. 9 (d) is a view showing an engagement portion between the connector 39 and the insulator 37. . Moreover, FIG. 10 is schematic which shows the structure of the circuit board 6 in the impact wrench which concerns on 3rd Embodiment. FIG. 10A is a plan view showing the whole of the circuit board 6, and FIG. 10B is an enlarged view of a portion shown by G in FIG.

  The conductive rubber 236 is, as shown in FIG. 9A, a cylindrical portion 236c in which a substantially rectangular hole is formed in a substantially elliptic cylindrical shape, and a pair provided at both axial ends thereof. The conductive rubbers 236a and 236b. The conductive rubber 236 is an example of the elastic body of the present invention, has conductivity and has a function of absorbing vibration. The conductive rubber 236 is externally fitted to the projection 39 b of the connector 39 as shown in FIGS. 9 (b) and 9 (d).

  The configuration of the circuit board 6 is the same as that of the first embodiment, and as shown in FIG. 10A, a circular hole 6a in which the output shaft 31 is loosely fitted is formed at the center, and Six substantially rectangular holes 6b in which the connector 39 is fitted are formed at substantially equal intervals in the circumferential direction. The protrusion 39b of the connector 39 is fitted in the hole 6b. At this time, as shown in FIG. 9C, in the projecting portion 39b to which the conductive rubber 236 is externally fitted, the cylindrical portion 236c which is a portion located between the conductive rubber 236a and the conductive rubber 236b is a hole. The conductive rubber 236 a and the conductive rubber 236 b are in contact with the back surface and the front surface of the circuit board 6, respectively. In this state, the circuit board 6 and the connector 39 are connected via the conductive rubber 236.

  In the impact wrench according to the third embodiment configured as described above, in addition to the anti-vibration rubber 36 disposed between the stator 33 and the insulator 37 on the vibration transmission path P (FIG. 1), The conductive rubber 236 is also disposed between the connector 39 and the circuit board 6. Therefore, vibration generated by output unit 5 as a vibration source and transmitted to housing 2 and stator 33 is absorbed by anti-vibration rubber 36, and the amount of transmission of vibration to insulator 37 is reduced. Furthermore, conductive rubber The amount of vibration transmitted from the connector 39 to the circuit board 6 is reduced. As a result, the amount of transmission of the vibration generated in the output portion 5 to the circuit board 6 is further reduced, so bending of the circuit board 6 and peeling of the switching element 61 are suppressed, and conductivity with the circuit board 6 is improved. The effect of suppressing the drop of the connection portion of the connector 39 can be obtained without any damage. Further, the effect of suppressing the disconnection of the coil 35 is also improved.

  In the present embodiment, in addition to the vibration-proof rubber 36 disposed between the stator 33 and the insulator 37, the conductive rubber 236 is disposed between the connector 39 and the circuit board 6, but the present invention is not limited thereto. It is not limited to. In the impact wrench according to the second embodiment, the conductive rubber 236 is arranged only between the connector 39 and the circuit board 6 without arranging the vibration-proof rubber 36 between the stator 33 and the insulator 37. Thus, it is also possible to dispose the anti-vibration rubber 136 between the insulator 37 and the connector 39 as well. In any case, since the amount of vibration transmitted from the connector 39 to the circuit board 6 is reduced, it is possible to suppress the occurrence of bending of the circuit board 6 or disconnection of the coil 35 due to the transmission of the vibration.

  Further, in the present embodiment, the connector 39 is a conductive terminal, but the present invention is not limited to this. For example, it is also possible to dispose conductive rubber between a connector which is a signal terminal and a circuit board.

  Next, an impact wrench according to a fourth embodiment will be described. The impact wrench according to the present embodiment differs from the impact wrench 1 according to the first embodiment in that the projecting portion 339 b of the connector 339 is formed of an elastic body. In the following description, the same members as those in the first embodiment will be assigned the same reference numerals and descriptions thereof will be omitted.

  FIG. 11 is a view showing the configuration of the connector 339 in the impact wrench according to the fourth embodiment. FIG. 11A is a view showing a connection portion between the connector 339 and the circuit board 6, and FIG. 11B is a view showing an engagement portion between the connector 339 and the insulator 37.

  The connector 339 is made of a conductive material such as resin, and as shown in FIG. 11A, an engagement portion 339a engaged with the connector support portion 37h of the insulator 37, and a protrusion 339b protruding rearward in the axial direction And an inclined portion 339c which is inclined in the radial direction. The protrusion 339 b has a spiral shape as shown in FIGS. 11A and 11B, and is connected to the circuit board 6 at its end. In the present embodiment, the protrusion 339 b has its end fitted in the hole 6 b of the circuit board 6 and fixed by soldering. The protrusion 339 b is an example of the elastic body of the present invention, and has elasticity due to a helical shape, and absorbs vibration by its elasticity. That is, the connector 339 itself is shaped so as to be elastically deformed so as to function as an elastic body.

  In the impact wrench according to the fourth embodiment configured as described above, in addition to the anti-vibration rubber 36 disposed between the stator 33 and the insulator 37 on the vibration transmission path P (FIG. 1), An elastic connector 339 is disposed between the insulator 37 and the circuit board 6. Therefore, the vibration generated by the output unit 5 as the vibration source and transmitted to the housing 2 and the stator 33 is absorbed by the anti-vibration rubber 36, and the amount of transmission of the vibration to the insulator 37 is reduced. The amount of transmission of vibration from the connector 339 to the circuit board 6 is reduced. As a result, the amount of transmission of the vibration generated in the output portion 5 to the circuit board 6 is further reduced, so bending of the circuit board 6 and peeling of the switching element 61 are suppressed, and conductivity with the circuit board 6 is improved. The effect of suppressing the drop of the connection portion of the connector 39 can be obtained without any damage. Further, the effect of suppressing the disconnection of the coil 35 is also improved.

  In the present embodiment, in addition to the vibration-proof rubber 36 disposed between the stator 33 and the insulator 37, the connector 339 of an elastic body is disposed between the insulator 38 and the circuit board 6, but the present invention Is not limited to this. As in the impact wrench according to the second embodiment, the insulator 37 and the connector are not disposed between the stator 33 and the insulator 37 and only the connector 339 which is an elastic body is disposed. It is also possible to dispose the anti-vibration rubber 136 also between 339 and 339. In any case, since the amount of vibration transmitted from the connector 339 to the circuit board 6 is reduced, it is possible to suppress the occurrence of bending of the circuit board 6 or disconnection of the coil 35 due to the transmission of the vibration.

  Next, an impact wrench according to a fifth embodiment will be described. The impact wrench according to the present embodiment differs from the impact wrench 1 according to the first embodiment in the configuration in which the vibration-proof rubber 436 is disposed between the housing 2 and the stator 33. In the following description, the same members as those in the first embodiment are assigned the same reference numerals and descriptions thereof will be omitted.

  FIG. 12 is a view showing a connection portion of the housing 2 and the motor 3 in the impact wrench according to the fifth embodiment, and is a cross-sectional view taken along the line A-A of FIG. FIG. 12 shows only the left half of the cross-sectional view.

  The four convex portions 33 b provided on the outer peripheral portion of the stator 33 are supported by a plurality of ribs 28 provided to project in the body portion 2 a of the housing 2. In the present embodiment, as shown in FIG. 12, the anti-vibration rubber 436 is disposed between the convex portion 33 b and the rib 28. That is, the stator 33 is fixed to the housing 2 via the vibration-proof rubber 436. The anti-vibration rubber 436 is an example of the elastic body of the present invention, and has a function of absorbing vibration.

  In the impact wrench according to the fifth embodiment configured as described above, in addition to the anti-vibration rubber 36 disposed between the stator 33 and the insulator 37 on the vibration transmission path P (FIG. 1), Anti-vibration rubber 436 is also disposed between housing 2 and stator 33. Therefore, the output unit 5 is generated as a vibration source, and the vibration transmitted to the housing 2 is absorbed by the vibration-proof rubber 436, the amount of vibration transmission to the stator 33 is reduced, and the vibration-proof rubber 36 is absorbed. The amount of vibration transmission from the stator 33 to the insulator 37 is reduced. As a result, the amount of transmission of the vibration generated in the output unit 5 to the circuit board 6 is further reduced, so that the effect of suppressing the bending of the circuit board 6, the peeling of the switching element 61, and the falling of the connection portion of the connector 39 Be improved. Further, the amount of transmission of vibration to the coil 35 located in the stator 33, the outer peripheral surface of the insulator 37, the inclined portion 39c of the connector 39, etc. is also reduced, so the effect of suppressing generation of breakage in the coil 35 is also improved Be done.

  In the present embodiment, in addition to the anti-vibration rubber 36 disposed between the stator 33 and the insulator 37, the anti-vibration rubber 436 is disposed between the housing 2 and the stator 33, but the present invention It is not limited to. In the impact wrench according to the second embodiment, the vibration-proof rubber 36 is not arranged between the stator 33 and the insulator 37, and only the vibration-proof rubber 436 between the housing 2 and the stator 33 is arranged. As in the case of the impact wrench according to the third embodiment, the conductive rubber 236 is also disposed between the connector 39 and the circuit board 6 as in the case where the anti-vibration rubber 136 is disposed also between the insulator 37 and the connector 339. As in the impact wrench according to the fourth embodiment, various combinations are possible such as providing the connector 339 with a vibration absorbing function as in the case of the impact wrench according to the fourth embodiment. In any case, since the amount of vibration transmitted to the circuit board 6 via the vibration transmission path P is reduced, generation of bending of the circuit board 6 or disconnection of the coil 35 due to transmission of vibration can be suppressed. It becomes.

  Next, an impact wrench 501 according to the sixth embodiment will be described. The impact wrench 501 according to the present embodiment has a double insulation structure of a resin housing and an aluminum housing. In the following description, the same members as those in the first embodiment are assigned the same reference numerals and descriptions thereof will be omitted.

  FIG. 13 is a cross-sectional view showing the configuration of an impact wrench 501 according to the sixth embodiment. 14 is a view showing a supporting portion of the circuit board 506 in the impact wrench 501 according to the sixth embodiment, and is an enlarged view of a portion shown by H in FIG.

  The impact wrench 501 is comprised including the housing 502, the motor 3, the gear mechanism 4, the output part 5, the circuit board 506, the control part 7, and the power supply cord 8, as FIG. 13 shows.

  The outer shell of the impact wrench 501 is composed of a housing 521 made of resin, a housing 522 made of aluminum, and a cover 21 made of resin that covers the output section 5. The housing 521 corresponds to the motor housing of the present invention.

  The circuit board 506 is disposed below the motor 3 and connected to the motor 3 by a coil (not shown) drawn from the stator 33. The switching element 561 is disposed on the circuit board 506 opposite to the motor 3. In addition, the circuit board 506 is supported by a rib 529 which is provided to protrude inside the housing 521. In the present embodiment, as shown in FIG. 14, anti-vibration rubber 536 is disposed between circuit board 506 and rib 529. That is, the circuit board 506 is fixed to the housing 521 via the vibration proof rubber 536. The anti-vibration rubber 536 is an example of the elastic body of the present invention, and has a function of absorbing vibration.

  In the impact wrench 501 according to the sixth embodiment configured as described above, the vibration generated with the output unit 5 as the vibration source is transmitted to the motor 3 through the housing 521 and through the housing 521. It is also transmitted to the circuit board 506. That is, in the impact wrench 501 according to the present embodiment, a vibration transmission path (not shown) directly extending from the output unit 5 to the circuit board 506 via the housing 521 is formed. The vibration proof rubber 536 is disposed between the housing 521 and the circuit board 506 on this vibration transmission path. Therefore, the vibration generated in the output unit 5 and transmitted to the housing 521 is absorbed by the vibration-proof rubber 536 and the amount of transmission of the vibration to the circuit board 506 is reduced. Peeling or the like of an element to be mounted can be suppressed. In addition, it is possible to suppress the occurrence of disconnection in the coil which is pulled out of the motor 3 and connected to the circuit board 506.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to the above-mentioned each embodiment, A various change is possible in the range which does not deviate from the meaning. For example, although an impact wrench has been described as an example of a power tool, the present invention is not limited to this. For example, the invention can be applied to any power tool that uses a motor as a drive source, such as an impact driver, a hammer drill, a blower, and a circular saw.

  Moreover, although the circuit board by which switching elements, such as FET, are mounted as a board | substrate was demonstrated to the example, this invention is not limited to this. For example, it is also possible to adopt a substrate on which a sensor or the like is mounted.

  In the present embodiment, a power tool with a large output of 1000 W or more is assumed, but the present invention may be applied to a power tool with less than 1000 W, and in that case, the effect of suppressing coil breakage etc. is further obtained. Can. Further, the motor is not limited to a brushless motor, and may be an induction motor.

DESCRIPTION OF SYMBOLS 1, 501 Impact wrench 2, 521 Housing 3, 103 Motor 5 Output part 6, 506 Circuit board 33 Stator 35 Coil 36, 136, 436, 536 Vibration proof rubber 37, 38 Insulator 39, 339 Connector 236 Conductive rubber

Claims (14)

A substrate,
A motor connected to the substrate;
A motor accommodating portion for accommodating the motor;
An output unit driven by the motor;
The motor has a stator on which a coil is wound, and a substrate support that supports the substrate.
The substrate support portion has an insulator connected to the stator to insulate the stator and the coil, and a connector disposed between the insulator and the substrate and connected to the coil and supporting the substrate. And
A power tool, wherein a first elastic body is disposed between the connector and the substrate on a vibration transmission path from the output unit to the substrate via the motor.   The power tool according to claim 1, wherein a second elastic body is disposed in the substrate support portion.   The power tool according to claim 2, wherein the second elastic body is disposed between the insulator and the connector.   The power tool according to claim 2, wherein the second elastic body is the connector.   The power tool according to claim 4, wherein one end of the connector is connected to the insulator, and the other end of the connector is the second elastic body supporting the substrate. A substrate,
A motor connected to the substrate;
A motor accommodating portion for accommodating the motor;
An output unit driven by the motor;
The motor has a stator on which a coil is wound, and a substrate support that supports the substrate.
The substrate support portion has an insulator connected to the stator to insulate the stator and the coil, and a connector disposed between the insulator and the substrate and connected to the coil and supporting the substrate. And
A power tool, wherein a first elastic body is disposed between the insulator and the connector on a vibration transmission path from the output portion to the substrate via the motor.   The power tool according to claim 1, wherein a second elastic body is disposed between the stator and the insulator.   The power tool according to claim 1, wherein a second elastic body is disposed between the insulator and the substrate. The vibration transmission path is a path from the output portion to the substrate via the motor housing portion and the motor,
The electric power tool according to claim 1 or 6, wherein a second elastic body is disposed between the motor housing portion and the motor.   The power tool according to claim 9, wherein the second elastic body is disposed between the motor housing portion and the stator.   The power tool according to claim 1, wherein a second elastic body is disposed between the stator and the substrate support. The vibration transmission path is formed to reach the substrate from the output unit through the motor storage unit and the motor.
The power tool according to claim 1, wherein a second elastic body is disposed between the motor housing portion and the substrate.   7. The electric motor according to claim 1, wherein the vibration transmission path is formed to reach the substrate from the output portion through the motor housing portion, the stator, the insulator, and the connector. tool.   The power tool according to any one of claims 1 to 13, wherein the connector is a signal terminal.

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