JP2016101634A - Electric tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric tool which inhibits a substrate from being deflected by vibration transmitted thereto.SOLUTION: An impact wrench 1 includes: a circuit board 6; a motor 3 connected with the circuit board 6; a motor housing part 2 housing the motor 3; and an output part 5 driven by the motor 3. Anti-vibration rubbers 36, 136 are disposed on a vibration transmission path P ranging from the output part 5 to the circuit board 6.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an electric tool using a motor as a drive source.

  Small electric tools such as an impact driver and an impact wrench using a brushless motor as a drive source are known. In this type of electric tool, a hammer that is rotationally driven by a brushless motor strikes the anvil, and rotates the tip tool mounted on the anvil. Thereby, work, such as fastening of a fastener, becomes possible. Electric tools that use brushless motors can reduce the size of the tool body, and the brushless motor is electronically controlled by connecting the stator coil to the motor drive board by soldering. There was an advantage that power was obtained and power consumption was small. On the other hand, the vibration generated when the hammer strikes the anvil is transmitted to the motor and the substrate through the housing, which causes problems such as peeling of the mounting element and disconnection of the coil due to bending of the substrate.

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

  The stator 633 constituting the motor 603 has a substantially cylindrical shape, and an insulator 637 is disposed at the end of the stator 633 in the axial direction. The insulator 637 has a substantially cylindrical base portion 637 a and insulates the stator 633 from the coil 635. In addition, 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 637a of the insulator 637 is provided with a plurality of connector support portions 637h protruding in the axial direction of the stator 633, and the connector 639 is engaged with and supported by the connector support portion 637h.

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

  The substrate 606 is disposed so as to cover the insulator 637 and the connector 639, and is positioned by the positioning portion 637f of the insulator 637. The substrate 606 is formed with a plurality of holes (not shown), and the protrusions 639b of the connector 639 are fitted into the holes. A fitting portion between the protruding portion 639b of the connector 639 and the hole portion of the substrate 606 is fixed by soldering.

  Thus, in the conventional electric tool, the coil is connected to the substrate via the connector fixed to the substrate by soldering.

Japanese Patent Laid-Open No. 02-079760

  By the way, in recent years, there is a demand for an electric tool that is small and has a large output. However, in a power tool with a large output, the generated vibration also increases, so even when the coil and the board are connected via the connector, there are problems such as bending of the board, disconnection of the coil, and the soldered connector falling off. It has occurred.

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

  In order to solve the above problems, an electric tool according to the present invention includes a substrate, a motor connected to the substrate, a motor accommodating portion that accommodates the motor, and an output portion driven by the motor, and an output portion. An elastic body is disposed on a vibration transmission path from the substrate to the substrate.

  According to such a configuration, transmission of vibration generated in the output unit to the substrate can be suppressed due to the vibration isolation effect of the elastic body. Therefore, it is possible to suppress the occurrence of bending of the substrate without increasing the size of the tool body.

  In the above-described electric tool, the vibration transmission path is formed so as to reach the substrate from the output unit via the motor. In this case, the elastic body is preferably arranged between the motor and the substrate.

  According to such a configuration, it is possible to suppress the vibration generated at the output unit and transmitted to the motor from being transmitted to the substrate by the elastic body, so that it is possible to suppress the occurrence of substrate bending, coil breakage, and the like.

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

  According to such a configuration, transmission of vibration from the stator to the insulator can be suppressed, so that occurrence of disconnection of the coil in the vicinity of the insulator can be suppressed. Moreover, since the transmission of vibration to the substrate is suppressed, the occurrence of bending of the substrate can be suppressed.

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

  According to such a configuration, it is possible to suppress the transmission of vibration from the substrate support portion to the substrate, and thus it is possible to suppress the occurrence of bending of the substrate.

  It is preferable that the substrate support portion includes an insulator that is connected to the stator and insulates the stator and the coil, and the elastic body is disposed between the insulator and the substrate.

  According to such a configuration, it is possible to suppress the transmission of vibration from the insulator to the substrate, and thus it is possible to suppress the occurrence of bending of the substrate.

  The substrate support unit includes an insulator connected to the stator and insulating 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 the elastic body includes the connector and It is preferable to arrange | position between board | substrates.

  According to such a configuration, it is possible to suppress the transmission of vibration from the connector to the substrate, and thus it is possible to suppress the occurrence of bending of the substrate. Further, it is possible to suppress the connector from falling off the board.

  The substrate support portion includes an insulator connected to the stator and insulating 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 the elastic body includes the insulator It is preferable to arrange | position between connectors.

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

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

  According to such a configuration, since it is possible to transmit a signal to the substrate while suppressing transmission of vibration from the connector to the substrate, it is possible to suppress the occurrence of bending of the substrate without impairing the workability of the tool.

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

  According to such a configuration, it is possible to suppress the vibration generated in the output unit and transmitted to the motor housing unit from being transmitted to the motor by the elastic body, and thus it is possible to suppress the occurrence of disconnection of the motor coil. Moreover, since the transmission of vibration to the substrate is suppressed, the occurrence of bending of the substrate can be suppressed.

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

  According to such a configuration, transmission of vibration from the motor housing portion to the stator can be suppressed, so that occurrence of disconnection of the coil wound around the stator can be suppressed and prevented. Moreover, since the transmission of vibration to the substrate is suppressed, the occurrence of bending of the substrate can be suppressed.

  In the above-described electric tool, the vibration transmission path is formed so as to reach the substrate from the output unit via the motor. In this case, the elastic body is preferably arranged in the motor.

  According to such a configuration, the elastic body can suppress the vibration generated in the output unit from being transmitted in the motor, so that it is possible to suppress the occurrence of breakage of the motor coil. Moreover, since the transmission of vibration to the substrate is suppressed, the occurrence of bending of the substrate can be suppressed.

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

  According to such a configuration, transmission of vibration from the stator to the substrate support portion can be suppressed, so that occurrence of disconnection of the coil in the vicinity of the substrate support portion can be suppressed. Moreover, since the transmission of vibration to the substrate is suppressed, the occurrence of bending of the substrate can be suppressed.

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

  According to such a configuration, it is possible to suppress the transmission of the vibration generated in the output unit within the substrate support unit, and thus it is possible to suppress the occurrence of disconnection of the coil in the vicinity of the substrate support unit. Moreover, since the transmission of vibration to the substrate is suppressed, the occurrence of bending of the substrate can be suppressed.

  The substrate support portion includes an insulator connected to the stator and insulating 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 the elastic body includes the insulator It is preferable to arrange | position between connectors.

  According to such a 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 dropping of the connector from the substrate can be suppressed. Moreover, since the transmission of vibration to the substrate is suppressed, the occurrence of bending of the substrate can be suppressed.

  The substrate support unit is connected to the stator to insulate the stator and the coil, the insulator connected to the stator to insulate the stator and the coil, and disposed between the insulator and the substrate and connected to the coil and supports the substrate. The elastic body is preferably a connector.

  According to such a configuration, vibration is absorbed in the connector and transmission of vibration from the connector to the board can be suppressed, so that occurrence of bending of the board, disconnection of the coil, dropping of the connector from the board, and the like can be suppressed. .

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

  According to such a configuration, vibration is absorbed in the portion of the connector that supports the substrate, and therefore transmission of vibration to the substrate can be suppressed. Therefore, it is possible to suppress the occurrence of bending of the board and the disconnection of the connector from the board.

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

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

  In the above-described electric power tool, the motor includes a stator around which the coil is wound, an insulator connected to the stator and insulating the stator and the coil, a connector disposed between the insulator and the substrate and connected to the coil and supporting the substrate. The vibration transmission path is preferably formed so as to reach from the output portion to the substrate via the motor housing portion, the stator, the insulator, and the connector.

  According to this configuration, it is possible to suppress vibration from being transmitted from the output unit to the board along the vibration transmission path, and thus it is possible to suppress the occurrence of bending of the board, disconnection of the coil, dropping of the connector from the board, and the like. It becomes.

  An electric tool according to another aspect of the present invention includes a substrate, a motor connected to the substrate, a motor accommodating portion that accommodates the motor, and an output portion that is driven by the motor, from the output portion via the motor. And a vibration transmission path to the substrate is formed, and an elastic body is arranged on the vibration transmission path of the components constituting the motor.

  According to such a configuration, the vibration generated in the output unit can be prevented from being transmitted to the substrate via the motor due to the vibration-proofing effect of the elastic body. Therefore, it is possible to suppress the occurrence of bending of the substrate without increasing the size of the tool body.

  In the electric tool described above, the motor includes a stator around which the coil is wound, an insulator that is connected to the stator and insulates the stator and the coil, and a connector that is disposed between the insulator and the substrate and is connected to the coil and supports the substrate. It is preferable to have.

  According to such a configuration, it is possible to suppress the occurrence of coil disconnection or the like in the motor, and to suppress the transmission of vibration to the substrate, thereby suppressing the occurrence of bending of the substrate.

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

  According to such a configuration, transmission of vibrations from the motor housing portion to the stator can be suppressed, so that occurrence of disconnection of the coil wound around the stator can be suppressed. Further, since it is possible to suppress the transmission of vibration to the substrate, it is possible to suppress the occurrence of bending of the substrate.

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

  According to such a configuration, since transmission of vibration from the stator to the insulator can be suppressed, occurrence of coil disconnection in the vicinity of the insulator and the connector can be suppressed. Further, since it is possible to suppress the transmission of vibration to the substrate, it is possible to suppress the occurrence of bending of the substrate.

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

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

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

  According to such a configuration, it is possible to suppress the transmission of vibration from the insulator to the substrate, and thus it is possible to suppress the occurrence of bending of the substrate.

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

  According to such a configuration, transmission of vibration from the connector to the board can be suppressed, so that occurrence of bending of the board, dropping of the connector from the board, and the like can be suppressed. In addition, since transmission of signals is possible while suppressing transmission of vibration from the connector to the board, it is possible to suppress the occurrence of bending of the board without impairing the workability of the tool.

  The elastic body is preferably a connector.

  According to such a 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, and the like can be suppressed.

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

  According to such a configuration, vibration is absorbed in the portion of the connector that supports the substrate, and therefore transmission of vibration to the substrate can be suppressed. Therefore, it is possible to suppress the occurrence of bending of the substrate.

  An electric power tool according to still another aspect of the present invention includes a substrate, a motor connected to the substrate and having a stator, a motor accommodating portion that accommodates the motor, and an output portion driven by the motor, and the stator. An elastic body is disposed between the substrate and the substrate.

  According to such a configuration, transmission of vibration generated in the output unit to the substrate can be suppressed due to the vibration isolation effect of the elastic body. Therefore, it is possible to suppress the occurrence of bending of the substrate without increasing the size of the tool body.

  According to the electric tool of the present invention, it is possible to suppress the vibration from being transmitted to the substrate and suppress the occurrence of the bending of the substrate.

It is sectional drawing which shows the structure of the impact wrench which concerns on this 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 engaging part of a connector and an insulator. (A) is a perspective view of a motor, (b) is an enlarged view of a portion indicated by B in (a). It is the side view and partial enlarged view which show the partial structure of the motor in the impact wrench which concerns on 1st 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 in (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 engaging part of a connector and an insulator. (A) is a perspective view of a motor, (b) is an enlarged view of a portion indicated by E in (a). It is the side view and partial enlarged view which show the partial structure of the motor in the impact wrench which concerns on 2nd 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 and connector in the impact wrench which concerns on 3rd Embodiment. (A) is a figure which shows the structure of a conductive rubber, (b) is a figure which shows the engaging part of a 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 engaging 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 in (a). It is a figure which shows the structure of the connector in the impact wrench which concerns on 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 engaging 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 accompanying drawings. Here, the case where the present invention is applied to an impact wrench will be described as an example.

  FIG. 1 is a cross-sectional view showing a configuration of an impact wrench 1 according to the present invention. As shown in FIG. 1, the impact wrench 1 includes a housing 2, a motor 3, a gear mechanism 4, an output unit 5, a circuit board 6, a control unit 7, and a power cord 8.

  The outer shell of the impact wrench 1 includes a resin housing 2 and a resin cover 21 that covers the output unit 5. A metal hammer case 22 is accommodated in the cover 21. The housing 2 corresponds to the motor housing portion of the present invention, and includes a body portion 2a, a handle portion 2b, and a substrate housing portion 2c. The body portion 2a has a substantially cylindrical shape, and accommodates the motor 3, the gear mechanism 4, and the output portion 5 in this order in cooperation with the cover 21 and the hammer case 22. 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 opposite is defined as the upper side.

  An air inlet (not shown) for sucking outside air is formed on the rear end surface of the body part 2a of the housing 2, and the body part 2a located outside the cooling fan 34 described later is provided in the body part 2a. An exhaust port (not shown) for discharging the sucked outside air is formed. 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 handle portion 2b, and a power cord 8 that can be connected to a commercial AC power source extends at a tip position in the extending direction. In the handle portion 2b, a trigger 24 serving as an operation location of the operator is provided at the front side position from the trunk portion 2a. The trigger 24 is connected to the switch mechanism 23, and is used to switch between supplying and interrupting driving power to the motor 3 and switching the rotation direction of the motor 3. The trigger 24 of the present embodiment is a tumbler switch.

  The substrate housing portion 2c protrudes from the lower end position of the handle portion 2b toward the front side, and is configured integrally with the handle portion 2b. The controller 7 is accommodated inside the substrate accommodating portion 2c. 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 portion 2a so that the axial direction coincides with the front-rear direction, protrudes forward and backward of the rotor 32, and is rotatably supported by the body portion 2a by a bearing at the protruding portion. . In the output shaft 31, a cooling fan 34 that rotates coaxially with the output shaft 31 is provided at a portion protruding forward. 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 disposed so as to surround the rotor 32. A detailed configuration of the motor 3 will be described later.

  The gear mechanism 4 is a reduction mechanism configured by a planetary gear mechanism including a plurality of gears, and reduces 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 arranged. At the front end of the anvil 52, an attachment portion 53 for attaching a tip tool is provided.

  The hammer 51 has a collision part 51a at the front end, and the anvil 52 has a collision part 52a at the rear end. Further, the hammer 51 is urged forward by a spring 54 so that the collision part 51a collides with the collided part 52a in the rotation direction when it rotates. With such a configuration, when the hammer 51 rotates, the anvil 52 is hit.

  The hammer 51 is configured to be movable backward against the urging force of the spring 54. Usually, since the collision part 51a of the hammer 51 and the collision part 52a of the anvil 52 are engaged, the rotation of the motor 3 is transmitted to the anvil 52 via the gear mechanism 4 and the hammer 51, and the hammer 51 and the anvil are transmitted. When the end tool (not shown) attached to the attachment portion 53 is rotated integrally with the attachment 52, the fastener is fastened. On the other hand, since the load becomes large at the end of fastening of the fastener, the hammer 51 is in a locked state, and the hammer 51 and the anvil 52 cannot rotate integrally. Then, the hammer 51 moves backward while rotating against the urging force of the spring 54. When the collision part 51a gets over the collision part 52a, the elastic energy stored in the spring 54 is released, the hammer 51 moves forward, and the collision part 51a and the collision part 52a collide. . By repeating this, the anvil 52 rotates little by little, and the tightening operation can be performed even when 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 Field Effect 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 that is housed in the board housing part 2 c and controls the entire impact wrench 1. The control circuit board 71 switches the rotation direction of the motor 3 when the trigger 24 is operated (pressed) on the upper side or the lower side with the central portion in the vertical direction as a fulcrum. It should be noted that the rotational speed of the motor 3 can be controlled by adjusting the amount of power supplied to the motor 3 in accordance with the operation amount of the trigger 24. The operator can set the operating speed and the like of the impact wrench 1 by operating the operation panel 25.

  The power cord 8 supplies power to each unit by being connected to a commercial AC power source.

  Next, a 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 supporting 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. FIG. 2 shows only the left half of the cross-sectional view. 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. As shown in FIG. 2, the stator 33 has six protrusions (tooth portions) 33a arranged in the circumferential direction so as to protrude radially inward. Is provided. In addition, on the outer peripheral portion of the stator 33, four convex portions 33b that protrude outward in the radial direction are provided. A plurality of ribs 28 project from the body portion 2 a of the housing 2, and the convex portions 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. 3A is a perspective view showing a partial configuration of the motor 3 in the impact wrench 1 according to the first embodiment, and FIG. 3B is an enlarged view of a portion indicated by B in FIG. FIG. 5 is a partially enlarged view showing an engagement portion between the connector 39 and the insulator 37. 4 is 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. FIG. 4 (a) shows a side view of the motor 3, and FIG. (B) is CC sectional drawing of Fig.4 (a).

  On the rear surface in the axial direction of the stator 33, as shown in FIGS. 3 and 4A, a vibration-proof rubber 36 and an insulator 37 are disposed. An insulator 38 is also arranged on the front surface of the stator 33 in the axial direction. 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 so as to cover the entire rear surface of the stator 33 including the protruding portion 33a. That is, the anti-vibration rubber 36 has a substantially cylindrical base 36a and six protrusions 36b arranged in the circumferential direction so as to protrude radially inward from the base 36a. The base portion 36 a is a portion that covers the rear surface of the substantially cylindrical portion of the stator 33, and the protruding portion 36 b is a portion that covers the rear surface of the protruding portion 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 rear surface in the axial direction 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 includes a substantially cylindrical base portion 37a, six coil winding portions 37b arranged in a circumferential direction so as to protrude radially inward from the base portion 37a, and an axial direction at an end portion of each coil winding portion 37b. And a coil support portion 37c protruding rearward. A coil 35 for generating magnetic flux is wound around the coil winding portion 37b. The coil support part 37c supports the coil 35 wound around the coil winding part 37b.

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

  The insulator 37 includes four substrate positioning portions 37f that protrude rearward in the axial direction and are arranged in the circumferential direction on the rear surface in the axial direction of the base portion 37a, and four substrates that protrude rearward in the axial direction and radially outward and are arranged in the circumferential direction. Positioning part 37g. The board positioning portion 37f contacts the front surface of the circuit board 6 in the axial direction, and positions the circuit board 6 in the axial direction. The board positioning portion 37g protrudes axially rearward and radially outward from the board positioning portion 37f, contacts the outer peripheral surface of the circuit board 6, and performs positioning of the circuit board 6 in the radial direction.

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

  The connector 39 is made of a conductive material such as resin. As shown in FIGS. 3B and 4B, the connector 39 engages with the connector support portion 37h of the insulator 37, and the rear in the axial direction. A projecting portion 39b projecting in the radial direction, and an inclined portion 39c inclined in the radial direction. As shown in FIG. 4A, the protruding portion 39b is a portion connected to the circuit board 6 and protrudes rearward in the axial direction. The inclined portion 39c 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 board support portion of the present invention.

  FIG. 5 is a diagram 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 diagram showing the configuration of the circuit board 6 in the impact wrench 1 according to the first embodiment. 6A is a plan view showing the entire circuit board 6, and FIG. 6B is an enlarged view of a portion indicated by D in FIG. 6A.

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

  In addition, as shown in FIG. 6A, the circuit board 6 has six holes 6b arranged in the circumferential direction. The hole 6b has a substantially rectangular shape, and the protrusion 39b of the connector 39 is fitted in each hole 6b. The fitting portion of the hole 6b and the protruding portion 39b 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 with each other in the output unit 5 when performing the fastening operation of the fastener. At the time of this collision, vibration is generated using the output unit 5 as a vibration source and transmitted to each part. A vibration transmission path through which vibration generated in the output unit 5 is transmitted is indicated by an arrow P in FIG. The vibration transmission path P reaches the circuit board 6 from the output portion 5 through the body portion 2a 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. Since the anti-vibration rubber 36 has a vibration absorbing function, it absorbs vibration transmitted from the output unit 5 through the housing 2 and the stator 33, and reduces the amount of vibration transmitted to the insulator 37, the connector 39 and the circuit board 6. To reduce. As a result, the amount of vibration generated in the output unit 5 transmitted 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 dropped from the circuit board 6. This can be suppressed. Further, since the amount of vibration transmitted 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 disconnected.

  As described above, in the present embodiment, the vibration isolating rubber 36 is disposed between the stator 33 and the insulator 37 on the vibration transmission path P that uses the output unit 5 as a vibration source and reaches the circuit board 6. It is possible to suppress the transmission of vibrations to each part located on the downstream side of the stator 33 on the path P. Therefore, it is possible to suppress the occurrence of bending of the circuit board 6 and disconnection of the coil 35 due to vibration transmission without increasing the size of the tool body.

  Next, an impact wrench according to the 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 that the vibration isolating 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 denoted by the same reference numerals, and description thereof is omitted.

  FIG. 7A is a perspective view showing a partial configuration of the motor 103 in the impact wrench according to the second embodiment, and FIG. 7B is an enlarged view of a portion indicated by E in FIG. FIG. 5 is a partial enlarged view showing an engagement portion between the connector 39 and the insulator 37. FIG. 8 is 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. FIG. 8A shows a side view of the motor 103, and FIG. FIG. 8B is a sectional view taken along line FF in FIG.

  In the motor 103, an anti-vibration rubber 136 is disposed between the insulator 37 and the connector 39, as shown in FIGS. 7B and 8B. The anti-vibration rubber 136 is formed in a U shape having a bottom surface, and is disposed so as to cover the entire portion of the connector support portion 37 h of the insulator 37 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 vibration isolating rubber 36 disposed between the stator 33 and the insulator 37 on the vibration transmission path P (FIG. 1), An anti-vibration rubber 136 is also disposed between the insulator 37 and the connector 39. Therefore, the vibration generated by the output unit 5 as a vibration source and transmitted to the housing 2 and the stator 33 is absorbed by the vibration isolating rubber 36, and the amount of vibration transmitted to the insulator 37 is reduced. Absorbed by the rubber 136, the amount of vibration transmitted from the insulator 37 to the connector 39 is reduced. This further reduces the amount of vibration generated in the output unit 5 to the circuit board 6, thereby further preventing the circuit board 6 from being bent, the switching element 61 from being peeled off, and the connector 39 from being dropped off. Be improved. Further, the effect of suppressing 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. It is not limited to. It is also possible to dispose the vibration isolating rubber 36 only between the insulator 37 and the connector 39 without disposing the vibration isolating rubber 36 between the stator 33 and the insulator 37. Also in this case, since the amount of vibration transmitted from the insulator 37 to the circuit board 6 via the connector 39 is reduced, it is possible to suppress the occurrence of bending of the circuit board 6 and disconnection of the coil 35 due to vibration transmission. It becomes.

  It is also possible to arrange a vibration isolating rubber between the board 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 passing through 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 is different from the impact wrench 1 according to the first embodiment in that 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 denoted by the same reference numerals, and description thereof is omitted.

  FIG. 9 is a diagram 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 diagram showing a configuration of the conductive rubber 236, and FIG. 9B is a diagram showing an engagement portion between the conductive rubber 236 and the connector 39. FIG. 9C is a diagram showing a connection portion between the conductive rubber 236, the connector 39 and the circuit board 6, and FIG. 9D is a diagram showing an engagement portion between the connector 39 and the insulator 37. . FIG. 10 is a schematic diagram showing the configuration of the circuit board 6 in the impact wrench according to the third embodiment. 10A is a plan view showing the entire circuit board 6, and FIG. 10B is an enlarged view of a portion indicated by G in FIG. 10A.

  As shown in FIG. 9A, the conductive rubber 236 includes a cylindrical portion 236c in which a substantially rectangular hole is formed inside a substantially elliptic cylinder, and a pair provided at both ends in the axial direction. Conductive rubbers 236a and 236b. The conductive rubber 236 is an example of the elastic body of the present invention, and has a conductivity and a function of absorbing vibration. The conductive rubber 236 is externally fitted to the protruding portion 39b of the connector 39, as shown in FIGS. 9B and 9D.

  The configuration of the circuit board 6 is the same as that of the first embodiment. As shown in FIG. 10A, a circular hole 6a into which the output shaft 31 is loosely fitted is formed at the center. Six substantially rectangular holes 6b into which the connector 39 is fitted are formed at substantially equal intervals in the circumferential direction. The protruding portion 39b of the connector 39 is fitted into the hole 6b. At this time, as shown in FIG. 9C, in the protruding portion 39b fitted with the conductive rubber 236, 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 236a and the conductive rubber 236b are in contact with the rear 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 vibration isolating rubber 36 disposed between the stator 33 and the insulator 37 on the vibration transmission path P (FIG. 1), A conductive rubber 236 is also disposed between the connector 39 and the circuit board 6. Therefore, the vibration generated by using the output unit 5 as a vibration source and transmitted to the housing 2 and the stator 33 is absorbed by the vibration isolating rubber 36, the amount of vibration transmitted to the insulator 37 is reduced, and further, the conductive rubber. The amount of vibration transmitted from the connector 39 to the circuit board 6 is reduced. As a result, the amount of vibration generated in the output unit 5 transmitted to the circuit board 6 is further reduced, so that bending of the circuit board 6 and peeling of the switching element 61 are suppressed, and conductivity with the circuit board 6 is reduced. The effect of suppressing the dropout of the connecting portion of the connector 39 can be obtained without loss. Further, the effect of suppressing the disconnection of the coil 35 is also improved.

  In the present embodiment, the conductive rubber 236 is disposed between the connector 39 and the circuit board 6 in addition to the vibration isolating rubber 36 disposed between the stator 33 and the insulator 37. It is not limited to. The anti-vibration rubber 36 is not disposed between the stator 33 and the insulator 37, and the conductive rubber 236 is disposed only between the connector 39 and the circuit board 6, or the impact wrench according to the second embodiment is provided. As described above, the anti-vibration rubber 136 can also be disposed between the insulator 37 and the connector 39. 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 and disconnection of the coil 35 due to the transmission of vibration.

  In the present embodiment, the connector 39 is a conductive terminal, but the present invention is not limited to this. For example, it is 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 is different from the impact wrench 1 according to the first embodiment in that the protrusion 339b of the connector 339 is formed of an elastic body. In the following description, the same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

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

  The connector 339 is made of a conductive material such as resin. As shown in FIG. 11A, the connector 339 engages with a connector support portion 37h of the insulator 37, and a protrusion 339b protrudes rearward in the axial direction. And an inclined portion 339c inclined in the radial direction. The protrusion 339b has a spiral shape as shown in FIGS. 11A and 11B and is connected to the circuit board 6 at the end thereof. In the present embodiment, the protruding portion 339b has its end fitted into the hole 6b of the circuit board 6, and is fixed by soldering. The protruding portion 339b is an example of the elastic body of the present invention, has elasticity by a spiral shape, and absorbs vibration by the elasticity. That is, the connector 339 itself has a shape that is easily 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 vibration isolating 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 using the output unit 5 as a vibration source and transmitted to the housing 2 and the stator 33 is absorbed by the anti-vibration rubber 36, the amount of vibration transmitted to the insulator 37 is reduced, and the connector 339 is further reduced. The amount of vibration transmitted from the connector 339 to the circuit board 6 is reduced. As a result, the amount of vibration generated in the output unit 5 transmitted to the circuit board 6 is further reduced, so that bending of the circuit board 6 and peeling of the switching element 61 are suppressed, and conductivity with the circuit board 6 is reduced. The effect of suppressing the dropout of the connecting portion of the connector 39 can be obtained without loss. Further, the effect of suppressing the disconnection of the coil 35 is also improved.

  In the present embodiment, the elastic connector 339 is disposed between the insulator 38 and the circuit board 6 in addition to the vibration isolating rubber 36 disposed between the stator 33 and the insulator 37. Is not limited to this. The anti-vibration rubber 36 is not disposed between the stator 33 and the insulator 37, and only the connector 339, which is an elastic body, is disposed, or the insulator 37 and the connector are disposed like the impact wrench according to the second embodiment. An anti-vibration rubber 136 can also be disposed 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 and disconnection of the coil 35 due to the transmission of vibration.

  Next, an impact wrench according to a fifth 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 that a 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 denoted by the same reference numerals, and description thereof is omitted.

  FIG. 12 is a view showing a connecting 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 AA 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 that protrude from the body portion 2 a of the housing 2. In the present embodiment, as shown in FIG. 12, an 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 isolating 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 vibration isolating rubber 36 disposed between the stator 33 and the insulator 37 on the vibration transmission path P (FIG. 1), An anti-vibration rubber 436 is also disposed between the housing 2 and the stator 33. Therefore, the vibration generated by using the output unit 5 as a vibration source and transmitted to the housing 2 is absorbed by the vibration isolating rubber 436, and the amount of vibration transmitted to the stator 33 is reduced and absorbed by the vibration isolating rubber 36. The amount of vibration transmitted from the stator 33 to the insulator 37 is reduced. As a result, the amount of vibration generated in the output unit 5 transmitted to the circuit board 6 is further reduced, so that the effect of suppressing bending of the circuit board 6, peeling of the switching element 61, and dropout of the connection portion of the connector 39 is further achieved. Be improved. In addition, since the amount of vibration transmitted 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 reduced, the effect of suppressing the occurrence of disconnection in the coil 35 is also improved. Is 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. It is not limited to. The anti-vibration rubber 36 is not disposed between the stator 33 and the insulator 37, but only the anti-vibration rubber 436 between the housing 2 and the stator 33 is disposed, or the impact wrench according to the second embodiment is provided. As described above, the anti-vibration rubber 136 is also disposed between the insulator 37 and the connector 339, and the conductive rubber 236 is also disposed between the connector 39 and the circuit board 6 as in the impact wrench according to the third embodiment. Various combinations are possible, such as disposing the connector and providing the connector 339 with a vibration absorbing function like 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, it is possible to suppress the occurrence of bending of the circuit board 6 and disconnection of the coil 35 due to vibration transmission. It becomes.

  Next, an impact wrench 501 according to a 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 denoted by the same reference numerals, and description thereof is omitted.

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

  As shown in FIG. 13, the impact wrench 501 includes a housing 502, a motor 3, a gear mechanism 4, an output unit 5, a circuit board 506, a control unit 7, and a power cord 8.

  The outer shell of the impact wrench 501 includes a resin housing 521, an aluminum housing 522, and a resin cover 21 that covers the output unit 5. The housing 521 corresponds to the motor housing portion 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. Note that the switching element 561 is disposed on the circuit board 506 on the opposite side to the motor 3. The circuit board 506 is supported by a rib 529 that protrudes inside the housing 521. In the present embodiment, as shown in FIG. 14, an anti-vibration rubber 536 is disposed between the circuit board 506 and the rib 529. That is, the circuit board 506 is fixed to the housing 521 via the vibration isolating 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, vibration generated using the output unit 5 as a vibration source is transmitted to the motor 3 via the housing 521 and also via 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) that directly reaches the circuit board 506 from the output unit 5 via the housing 521 is formed. The anti-vibration rubber 536 is disposed between the housing 521 and the circuit board 506 on the vibration transmission path. Therefore, the vibration generated in the output unit 5 and transmitted to the housing 521 is absorbed by the anti-vibration rubber 536 and the amount of vibration transmitted to the circuit board 506 is reduced. It is possible to suppress peeling of elements to be mounted. In addition, it is possible to suppress disconnection of the coil that is pulled out of the motor 3 and connected to the circuit board 506.

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, although an impact wrench has been described as an example of an electric tool, the present invention is not limited to this. For example, the present invention can be applied to an arbitrary electric tool using a motor as a drive source, such as an impact driver, a hammer drill, a blower, or a circular saw.

  Further, the circuit board on which a switching element such as an FET is mounted has been described as an example, but the present invention is not limited to this. For example, it is possible to employ a substrate on which a sensor or the like is mounted.

  In this embodiment, a power tool having a large output is assumed to be 1000 W or more, but it may be applied to a power tool of less than 1000 W, and in that case, a further effect of suppressing coil disconnection or the like can be obtained. Can do. 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 Anti-vibration rubber 37, 38 Insulator 39, 339 Connector 236 Conductive rubber

Claims (29)

A substrate,
A motor connected to the substrate;
A motor housing for housing the motor;
An output unit driven by the motor,
An electric tool characterized by disposing an elastic body on a vibration transmission path from the output section to the substrate. The vibration transmission path is formed so as to reach the substrate from the output unit via the motor,
The electric tool according to claim 1, wherein the elastic body is disposed between the motor and the substrate. The motor includes a stator around which a coil is wound, and an insulator that is connected to the stator and insulates the stator from the coil.
The electric tool according to claim 2, wherein the elastic body is disposed between the stator and the insulator. The motor includes a stator around which a coil is wound, and a substrate support portion that supports the substrate,
The electric tool according to claim 2, wherein the elastic body is disposed between the substrate support portion and the substrate. The substrate support portion includes an insulator connected to the stator and insulating the stator and the coil;
The electric tool according to claim 4, wherein the elastic body is disposed between the insulator and the substrate. The substrate support portion includes an insulator connected to the stator and insulating 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
The electric tool according to claim 4, wherein the elastic body is disposed between the connector and the substrate. The substrate support portion includes an insulator connected to the stator and insulating 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
The electric tool according to claim 4, wherein the elastic body is disposed between the insulator and the connector.   The power tool according to claim 6 or 7, wherein the connector is a signal terminal. The vibration transmission path is a path from the output unit to the substrate via the motor housing unit and the motor,
The electric tool according to claim 1, wherein the elastic body is disposed between the motor housing portion and the motor. The motor includes a stator around which a coil is wound, and a substrate support portion that supports the substrate,
The electric tool according to claim 9, wherein the elastic body is disposed between the motor housing portion and the stator. The vibration transmission path is formed so as to reach the substrate from the output unit via the motor,
The electric tool according to claim 1, wherein the elastic body is disposed in the motor. The motor includes a stator around which a coil is wound, and a substrate support portion that supports the substrate,
The electric tool according to claim 11, wherein the elastic body is disposed between the stator and the substrate support portion. The motor includes a stator around which a coil is wound, and a substrate support portion that supports the substrate,
The electric tool according to claim 11, wherein the elastic body is disposed in the substrate support portion. The substrate support portion includes an insulator connected to the stator and insulating 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
The electric tool according to claim 13, wherein the elastic body is disposed between the insulator and the connector. The substrate support portion includes an insulator connected to the stator and insulating 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
The electric tool according to claim 13, wherein the elastic body is the connector.   16. The electric tool according to claim 15, wherein one end of the connector is connected to the insulator, and the other end of the connector is the elastic body that supports the substrate. The vibration transmission path is formed so as to reach the substrate from the output unit through the motor housing unit,
The electric tool according to claim 1, wherein the elastic body is disposed between the motor housing portion and the substrate. The motor includes a stator on which a coil is wound, an insulator that is connected to the stator and insulates the stator and the coil, and is disposed between the insulator and the substrate, and is connected to the coil and supports the substrate. A connector, and
The power tool according to claim 1, wherein the vibration transmission path is formed so as to reach the substrate from the output portion through the motor housing portion, the stator, the insulator, and the connector. A substrate,
A motor connected to the substrate;
A motor housing for housing the motor;
An output unit driven by the motor,
A vibration transmission path from the output unit to the substrate via the motor is formed,
An electric tool characterized in that an elastic body is disposed on the vibration transmission path of a part constituting the motor.   The motor includes a stator on which a coil is wound, an insulator that is connected to the stator and insulates the stator and the coil, and is disposed between the insulator and the substrate, and is connected to the coil and supports the substrate. The power tool according to claim 19, further comprising a connector.   The electric tool according to claim 20, wherein the elastic body is disposed between the motor housing portion and the stator.   The electric tool according to claim 20, wherein the elastic body is disposed between the stator and the insulator.   The electric tool according to claim 20, wherein the elastic body is disposed between the insulator and the connector.   The electric tool according to claim 20, wherein the elastic body is disposed between the insulator and the substrate.   The electric tool according to claim 20, wherein the elastic body is disposed between the connector and the substrate.   26. The electric tool according to claim 25, wherein the connector is a signal terminal.   The electric tool according to claim 20, wherein the elastic body is the connector.   28. The electric tool according to claim 27, wherein one end of the connector is connected to the insulator, and the other end of the connector is the elastic body that supports the substrate. A substrate,
A motor connected to the substrate and having a stator;
A motor housing for housing the motor;
An output unit driven by the motor,
An electric tool characterized by disposing an elastic body between the stator and the substrate.

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