Work machine

Abstract

The present invention improves convenience. In the motor stopping mechanism (60) of the grinding machine (10), a metal wire (80) is arranged outside a shell (20), and a rod mechanism part (70) is kept in an initial state by a magnet (66). Furthermore, when the grinder (10) is in a suspended state, a backward pulling force is input to the wire (80), and when a pulling force equal to or greater than a predetermined value is transmitted to the lever mechanism part (70), the holding state of the lever mechanism part (70) by the magnet (66) is released, and the motor stop mechanism (60) is switched from an initial state to an operating state. Specifically, a lever mechanism part (70) (a first lever (72) and a second lever (74)) operates, a detection switch (62) is turned on, and driving of a motor (50) is limited. Therefore, when the grinding machine (10) is suspended, the driving of the motor (50) can be stopped. Therefore, the convenience of the grinding machine (10) can be improved.

Description

Technical Field

[0001] The present invention relates to a working machine. Background Art

[0002] In a disk grinder (working machine) described in Patent Document 1 below, a switch lever is provided on the outer peripheral portion of a housing. By operating the switch lever, a motor is driven, and thus a grinding wheel attached to the top end portion of the disk grinder rotates. Thereby, grinding processing or the like can be performed on a processing material by the disk grinder.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2019-81231 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] However, in a working machine such as a disk grinder, since the work is performed while holding the working machine, there is a possibility that the working machine may fall to the ground away from the operator's hand due to the operator's negligence or the like. Therefore, for example, a suspension member or the like is hooked on the outer peripheral portion of the disk grinder, and the disk grinder is suspended by the suspension member or the like when the disk grinder falls, thereby preventing the disk grinder from falling to the ground. And, in the suspended state of the disk grinder, by stopping (restricting) the driving of the motor, convenience can be improved. For example, a stop mechanism for stopping the driving of the motor is provided, and the stop mechanism is operated by the pulling force acting on the hooking portion in the suspended state. However, a member for holding the stop mechanism is constituted by an elastic member such as a spring. For example, when an excessive pulling force acts on the elastic member and the elastic member is deformed, there is a concern that the stop mechanism may not operate normally. In this case, the convenience of the working machine may be reduced.

[0008] And, when considering the posture of the above-described suspended state of the disk grinder, a structure in which a suspension member is hooked on the rear end portion of the disk grinder is desired. However, in the disk grinder, there is also a method of assembling a battery to the rear end portion. In the disk grinder of this method, it becomes a structure in which it is difficult to hook a suspension member on the rear end portion of the disk grinder. That is, in the suspended state of the disk grinder in which the battery is assembled, the motor cannot be stopped. In this case, the convenience of the working machine may also be reduced.

[0009] In consideration of the above facts, an object of the present invention is to provide a working machine that can improve convenience.

[0010] Means for Solving the Problems

[0011] One or more embodiments of the present invention are as follows: a working machine, comprising: a motor; a housing that houses the motor; a hooking member, at least a part of which is disposed outside the housing; a magnet disposed inside the housing; and a motor drive restricting portion held by the magnet, which operates by releasing the holding state based on the magnet using a pulling force equal to or greater than a predetermined value transmitted from the hooking member to restrict the drive of the motor.

[0012] One or more embodiments of the present invention are as follows: a working machine, wherein the motor drive restricting portion is configured to include: a moving portion movably disposed inside the housing and held in an initial state by the magnet; and a detection switch that detects the transmission of the pulling force to the moving portion. By transmitting the pulling force to the moving portion, the moving portion moves from the initial state, causing the detection switch to turn on or off, thereby switching the motor to a stopped state.

[0013] One or more embodiments of the present invention are as follows: a working machine, wherein the moving portion has: a first moving member held by the magnet, which moves to turn the detection switch off or on; and a second moving member connected to the hooking member, which moves by being transmitted the pulling force to release the holding state of the magnet on the first moving member.

[0014] One or more embodiments of the present invention are as follows: a working machine, wherein the moving portion has a pair of the second moving members.

[0015] One or more embodiments of the present invention are as follows: a working machine, wherein the hooking member is a long metal wire, and both ends in the length direction of the metal wire are connected to the second moving member.

[0016] One or more embodiments of the present invention are as follows: a working machine, wherein a support for holding the magnet is provided inside the housing, and the moving portion is supported by the support so as to be movable.

[0017] One or more embodiments of the present invention are as follows: a working machine, wherein the housing has divided housing members, and the support is assembled to the housing members in a manner of being clamped by the housing members.

[0018] One or more embodiments of the present invention are work machines as follows. The motor drive restricting section is configured to include: a motor switch that switches the motor to a driving state or a stopped state; a first sliding member that slides by being input with an operating force; a second sliding member that is linked to the first sliding member and turns on the motor switch by sliding together with the first sliding member; and a sliding link member that is held by the magnet, links the second sliding member and the first sliding member so as not to be relatively movable, and operates by the pulling force transmitted from the hooking member, allowing relative movement of the second sliding member with respect to the first sliding member.

[0019] One or more embodiments of the present invention are work machines as follows. The sliding link member is movably provided on the second sliding member, and links the second sliding member and the first sliding member so as not to be relatively movable by engaging with the first sliding member. When the sliding link member operates, the engagement state between the sliding link member and the first sliding member is released.

[0020] One or more embodiments of the present invention are work machines having: a motor having a rotating shaft; a housing that houses the motor; a battery holding section that is provided on the housing and holds a battery that supplies power to the motor; a hooking member at least a part of which is disposed outside the housing; a pulling force detection section that is provided on the battery holding section or at a position on the housing closer to the motor than the battery holding section and detects a pulling force equal to or greater than a predetermined value transmitted from the hooking member; and a control section that restricts driving of the motor based on the detection result of the pulling force detection section.

[0021] One or more embodiments of the present invention are work machines as follows. The pulling force detection section detects at least a pulling force in a direction away from the motor.

[0022] One or more embodiments of the present invention are work machines as follows. The pulling force detection section has a moving section that is movably provided inside the housing and held by a magnet. The moving section has a transmission section linked to the hooking member. When viewed from the axial direction of the motor, the transmission section protrudes from the housing in a crossing direction that crosses the assembly direction in which the battery is assembled to the battery holding section.

[0023] One or more embodiments of the present invention are work machines as follows. The transmission section protrudes from the housing to both sides in the crossing direction.

[0024] One or more embodiments of the present invention are as follows for a working machine. One end of the hooking member is connected to the transfer portion protruding toward one side in the crossing direction, and the other end is connected to the transfer portion protruding toward the other side in the crossing direction. The hooking member is configured to be able to be located at a position surrounding the battery and a position where the hooking member does not overlap with the battery when viewed in the battery assembly direction.

[0025] One or more embodiments of the present invention are as follows for a working machine. When viewed from the axial direction of the motor, the outer peripheral portion of the battery holding portion is located at a position outside the transfer portion in the crossing direction.

[0026] The effects of the invention are as follows.

[0027] According to one or more embodiments of the present invention, convenience can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a side view of a disk grinder according to the first embodiment as viewed from the left side.

[0029] Figure 2 is Figure 1 a top view of the disk grinder shown as viewed from the upper side.

[0030] Figure 3 is showing Figure 1 a side sectional view of the inside of the disk grinder shown as viewed from the left side.

[0031] Figure 4 is a perspective view of the handle portion of the disk grinder shown in a state where the left housing member is removed as viewed from the left front obliquely side. Figure 1 shown

[0032] Figure 5 is a magnified perspective view of the motor stop mechanism shown as viewed from the left rear obliquely side. Figure 4 shown

[0033] Figure 6 is showing Figure 4 a perspective view of the operating state of the motor stop mechanism shown as viewed from the left front obliquely side.

[0034] Figure 7 (A) of is a cross-sectional view of the initial state of the motor stop mechanism shown as viewed from the upper side (a cross-sectional view taken along line 7A-7A of Figure 4 shown), and (B) is a cross-sectional view showing the state where the motor stop mechanism in (A) is switched to the operating state. Figure 1 shown)

[0035] Figure 8It is a side view observed from the left side showing the interior of the rear end of the disk grinding machine of the second embodiment in a state where the tail cover is cut away.

[0036] Figure 9 It shows Figure 8 A perspective view of the interior of the rear end of the disk grinding machine observed from the left rear oblique side.

[0037] Figure 10 It shows in an enlarged manner Figure 9 A perspective view of the motor stop mechanism shown observed from the left rear oblique side.

[0038] Figure 11 (A) of shows Figure 8 A side view showing the state where the first sliding member and the second sliding member in the motor stop mechanism shown slide to the on position, and (B) is a perspective view of the motor stop mechanism in (A) observed from the left rear oblique side.

[0039] Figure 12 (A) of shows Figure 11 A side view showing the state where the motor stop lever in the motor stop mechanism shown in (A) of is pulled backward, and (B) is a perspective view of the motor stop mechanism in (A) observed from the left rear oblique side.

[0040] Figure 13 (A) of shows Figure 12 A side view showing the state where the second sliding member relatively moves backward with respect to the first sliding member in the motor stop mechanism shown in (A) of, and (B) is a perspective view of the motor stop mechanism in (A) observed from the left rear oblique side.

[0041] Figure 14 (A) of shows Figure 13 A side view showing the state in the middle of the first sliding member sliding to the off position in the motor stop mechanism shown in (A) of, and (B) is a perspective view of the motor stop mechanism in (A) observed from the left rear oblique side. Detailed Embodiment

[0042] (First Embodiment)

[0043] Hereinafter, the disk grinding machine 10 (hereinafter simply referred to as the grinding machine 10) as a working machine of the first embodiment will be described using Figures 1 to 7 . In addition, the arrows UP, FR, and LH appropriately shown in the drawings respectively show the upper side, front side, and left side of the grinding machine 10. Moreover, in the following description, when directions such as up and down, front and back, and left and right are used for description, the up and down direction, front and back direction, and left and right direction of the grinding machine 10 are shown without special description.

[0044] The grinding machine 10 is configured to apply tools such as grinding to the work material. As Figures 1 to 3 shown, the grinding machine 10 has a housing 20, a motor 50, and a motor stop mechanism 60 that restricts the driving of the motor 50. Hereinafter, each structure of the grinding machine 10 will be described.

[0045] (Regarding the housing 20)

[0046] The housing 20 forms the outer contour of the grinding machine 10. The housing 20 is integrally formed in a substantially hollow columnar shape extending in the front-rear direction. The housing 20 is configured to include a motor housing 22 that forms the middle portion in the front-rear direction of the housing 20, a handle housing 24 that forms the rear end portion of the housing 20, and a gear housing 26 that forms the front end portion of the housing 20.

[0047] (Regarding the motor housing 22)

[0048] The motor housing 22 is composed of an indivisible single component. The motor housing 22 has a motor accommodation portion 22A that forms the front portion of the motor housing 22 and a switch holding portion 22B that forms the rear portion of the motor housing 22, and the switch holding portion 22B is disposed within the handle housing 24 described below.

[0049] The motor accommodation portion 22A is formed in a substantially bottomed cylindrical shape that opens forward. At the front end portion of the motor accommodation portion 22A, a fan accommodation portion 22C that projects radially outward is formed, and the fan accommodation portion 22C is formed in a substantially rectangular shape when viewed from the front. A switch lever 14 is provided on the left side portion of the motor accommodation portion 22A. The switch lever 14 is connected to the motor accommodation portion 22A so as to be slidable in the front-rear direction. Specifically, the switch lever 14 is configured to be slidable between a disconnection position (refer to Figure 1 and Figure 2 ) and a connection position that slides forward from the disconnection position. As Figure 4 shown, the switch lever 14 is connected to the front end portion of a slide bar 16 that extends in the front-rear direction, and the slide bar 16 is disposed inside the motor accommodation portion 22A and the handle housing 24 ( Figure 4 only shows the rear portion of the slide bar 16). Moreover, when the switch lever 14 slides from the disconnection position to the connection position, a motor switch 12 described below is turned on by the slide bar 16, and thus the motor 50 is driven.

[0050] As Figure 3 shown, at a substantially central portion of the rear wall of the motor accommodation portion 22A, a bearing holding portion 22D is formed, and the bearing holding portion 22D is formed in a substantially bottomed cylindrical shape that opens forward. A plurality of hole portions are formed on the rear wall of the motor accommodation portion 22A and on the outer sides in the left-right direction of the bearing holding portion 22D, and the inside of the motor accommodation portion 22A and the inside of the handle housing 24 are communicated by these hole portions.

[0051] As Figure 3 andFigure 4 As shown, the switch holding part 22B is formed in a substantially rectangular box shape that opens to the right. The motor switch 12 is housed in the switch holding part 22B, and the switch body 12A of the motor switch 12 is held by the switch holding part 22B. The motor switch 12 has a plunger 12B that protrudes rearward from the switch body 12A, and the plunger 12B is exposed through an exposure hole 22E formed in the left wall of the switch holding part 22B so as to be visually recognizable from the left side. Further, the rear end portion of the slide rod 16 is disposed adjacent to the rear side of the plunger 12B. When the switch rod 14 and the slide rod 16 slide from the off position to the on position, the slide rod 16 presses the plunger 12B, and the motor switch 12 is switched from off to on. The motor switch 12 is electrically connected to the controller 32 described below.

[0052] (Regarding the handle housing 24)

[0053] As Figures 1 to 4 shown, the handle housing 24 is composed of housing members 24L and 24R that are divided into two parts in the left-right direction. Further, fixing bosses formed on the housing members 24L and 24R sandwich the switch holding part 22B, and the housing members 24L and 24R are fixed to the switch holding part 22B by fixing screws SC (refer to Figure 3 ) that are inserted through the switch holding part 22B. The handle housing 24 is configured to include a handle part 24A that forms the front part of the handle housing 24 and a battery mounting part (battery holding part) 24B that forms the rear part of the handle housing 24.

[0054] The handle part 24A is formed in a substantially cylindrical shape that extends in the front-rear direction and is disposed adjacent to the rear side of the motor housing part 22A. The handle housing 24 is connected to the motor housing 22 such that the outer peripheral surface of the handle part 24A is coplanar with the outer peripheral surface of the motor housing part 22A.

[0055] Both side portions of the battery mounting part 24B in the left-right direction protrude more outward in the left-right direction than the handle part 24A, and both side portions of the battery mounting part 24B in the up-down direction protrude more outward in the up-down direction than the handle part 24A. An inclined part 24C that inclines radially outward of the handle part 24A as it faces the rear side is formed at the boundary part between the handle part 24A and the battery mounting part 24B, and the handle part 24A and the battery mounting part 24B are smoothly connected by the inclined part 24C.

[0056] When viewed from the left - right direction, the battery assembly portion 24B inclines backward as it faces upward. A terminal block 30 is provided at the rear end portion of the battery assembly portion 24B, and the terminal block 30 is assembled to the battery assembly portion 24B in such a manner that it is clamped from the outer sides in the left - right direction by the housing members 24L and 24R. A controller 32 as a control portion is provided in the battery assembly portion 24B and on the front side of the terminal block 30. The controller 32 is formed in a substantially rectangular flat shape with the front - rear direction as the thickness direction, and when viewed from the side, it inclines backward as it faces upward. The controller 32 is assembled to the battery assembly portion 24B in such a manner that it is clamped from the outer sides in the left - right direction by the housing members 24L and 24R. Moreover, a storage battery 34 as a battery is assembled to the rear end portion of the battery assembly portion 24B from the upper side, and is connected to a terminal 30A provided on the terminal block 30 and electrically connected to the controller 32.

[0057] (Regarding the gear housing 26)

[0058] The gear housing 26 is formed in a concave shape that opens downward, and when viewed from the left - right direction, the upper wall of the gear housing 26 inclines upward as it faces backward. The rear end portion of the gear housing 26 protrudes more upward than the upper wall of the gear housing 26 and is formed in a substantially rectangular cylindrical shape that opens backward. Moreover, in a state where the fan housing portion 22C of the motor housing 22 and the rear end portion of the gear housing 26 are butted against each other in the front - rear direction, the gear housing 26 is fastened and fixed to the motor housing 22. A gasket protrusion 36 is provided on the lower side of the gear housing 26. The gasket protrusion 36 is formed in a stepped cylindrical shape with the up - down direction as the axial direction and is fixed to the gear housing 26.

[0059] A main shaft 38 is provided inside the gear housing 26. The main shaft 38 is formed in a substantially cylindrical shape with the up - down direction as the axial direction. The upper end portion of the main shaft 38 is supported by a bearing 40 fixed to the gear housing 26 so as to be rotatable, and the middle portion of the main shaft 38 in the up - down direction is supported by a bearing 42 fixed to the gasket protrusion 36 so as to be rotatable. A bevel gear 44 is integrally rotatably provided on the upper - end - side portion of the main shaft 38, and a grinding wheel 46 is mounted on the lower end portion of the main shaft 38. And a wheel protection member 48 is detachably fixed to the lower end portion of the gasket protrusion 36, and a part of the grinding wheel 46 is covered by the wheel protection member 48.

[0060] (Regarding the motor 50)

[0061] As Figure 3As shown, the motor 50 is configured as a brushless motor and is housed in the motor housing portion 22A of the motor housing 22. The motor 50 has a rotating shaft 50A, and the rotating shaft 50A is arranged with the front-rear direction as the axial direction. That is, the above-mentioned battery mounting portion 24B is located on one axial side (rear side) of the rotating shaft 50A with respect to the motor 50. The rear end portion of the rotating shaft 50A is supported by a first motor bearing 52 held by a bearing holding portion 22D so as to be rotatable. The front end portion of the rotating shaft 50A is arranged inside the gear housing 26, and the front side portion of the rotating shaft 50A is supported by a second motor bearing 54 held by the gear housing 26 so as to be rotatable. A pinion 56 is fixed to the front end portion of the rotating shaft 50A, and the pinion 56 meshes with the bevel gear 44. Thereby, the driving force of the motor 50 is transmitted to the main shaft 38, and the grinding wheel 46 and the main shaft 38 rotate together, thereby applying grinding processing or the like to the workpiece.

[0062] (Regarding the motor stop mechanism 60)

[0063] As Figures 1 to 7 shown, the motor stop mechanism 60 is arranged inside the rear end portion of the handle portion 24A in the handle housing 24, and is located behind the switch holding portion 22B. That is, the motor stop mechanism 60 is located on the front side of the battery mounting portion 24B and on the rear side of the motor 50. The motor stop mechanism 60 is configured to include a detection switch 62, a support 64, a magnet 66, a rod mechanism portion 70 as a moving portion, and a wire 80 as a hooking member. Moreover, the detection switch 62 and the rod mechanism portion 70 correspond to the motor drive restriction portion and the tensile force detection portion of the present application.

[0064] The detection switch 62 is configured as a switch for detecting the operation of the rod mechanism portion 70 and restricting (stopping) the drive of the motor 50. The detection switch 62 has a switch body 62A and a plunger 62B, and the plunger 62B projects rearward from the switch body 62A. The switch body 62A is arranged adjacent to the rear side of the switch holding portion 22B of the motor housing 22 and is fixed to the handle housing 24 so as to be clamped from both left and right directions by the housing members 24L, 24R. The detection switch 62 is electrically connected to the controller 32.

[0065] The support 64 is made of a resin material. The support 64 extends in the left-right direction and is formed in a substantially U-shaped block shape that is open forward when viewed from its longitudinal direction. The support 64 is arranged behind the detection switch 62 and is fixed to the handle housing 24 so as to be clamped from both left and right directions by the housing members 24L, 24R. Cutout portions 64A are respectively formed at the front end portions of the upper wall and the lower wall of the support 64 and at the central portion in the left-right direction. The cutout portions 64A are formed in a concave shape that is open forward when viewed from above. A magnet holding portion 64B for holding the following magnet 66 is provided at the lower end portion of the support 64. The magnet holding portion 64B projects downward from the central portion in the left-right direction at the rear end portion of the lower wall of the support 64.

[0066] The magnet 66 is formed in a substantially cylindrical shape with the front-rear direction as the axial direction. The magnet 66 is integrally formed with the support 64 by means such as insert molding. Specifically, the rear portion of the magnet 66 is embedded in the magnet holding portion 64B of the support 64, and the front portion of the magnet 66 protrudes forward from the magnet holding portion 64B.

[0067] The rod mechanism portion 70 has a first rod 72 as a first moving member and a pair of left and right second rods 74 as second moving members. The first rod 72 is formed in a substantially rectangular plate shape with the front-rear direction as the plate thickness direction and the up-down direction as the length direction, and is disposed between the detection switch 62 and the magnet 66. Moreover, the first rod 72 is disposed within the cutout portion 64A of the support 64 in a top view. A rod support portion 72A that curls backward and upward is formed at the lower end portion of the first rod 72. The rod support portion 72A is formed in a substantially cylindrical shape with the left-right direction as the axial direction, and a part of the rod support portion 72A is open upward. Further, a support shaft 76 with the left-right direction as the axial direction is inserted into the rod support portion 72A, and the rod support portion 72A can be rotatably supported. The support shaft 76 is fixed to the handle housing 24 at both ends in the length direction. Thus, the first rod 72 is connected to the handle housing 24 in a manner that can rotate with the left-right direction as the axial direction.

[0068] The first rod 72 is made of a magnetic material. In the initial state of the rod mechanism portion 70 (motor stop mechanism 60), the first rod 72 is attracted by the magnet 66 due to the magnetic force of the magnet 66 and is held in a state of standing upright in the up-down direction (refer to Figures 3 to 5 and Figure 7 (A)). On the other hand, in the operating state of the rod mechanism portion 70 (motor stop mechanism 60), the holding state of the first rod 72 by the magnet 66 is released, and the first rod 72 rotates forward and presses the plunger 62B of the detection switch 62 (refer to Figure 6 and Figure 7 (B)). That is, in the operating state of the rod mechanism portion 70 (motor stop mechanism 60), the detection switch 62 is turned on, and the controller 32 restricts the driving of the motor 50 based on the output signal from the detection switch 62. In other words, it is set that when the motor 50 is in the driving state, the motor 50 stops.

[0069] A pair of second rods 74 on the left and right are configured to be symmetric left and right. Therefore, hereinafter, the second rod 74 disposed on the left side will be described, and the description of the second rod 74 on the right side will be appropriately omitted. The second rod 74 is formed in a substantially rectangular columnar shape extending in the left-right direction. The right part of the second rod 74 is disposed inside the left part of the support 64, and the left part of the second rod 74 protrudes from the support 64 to the left side. Moreover, the middle part of the second rod 74 in the left-right direction is supported by a rotating shaft 78 having the up-down direction as the axis so as to be rotatable, and both the upper and lower ends of the rotating shaft 78 in the up-down direction are fixed to the upper and lower walls of the support 64. Thus, the second rod 74 is connected to the support 64 in such a manner as to be rotatable about the up-down direction as the axis.

[0070] The left end portion (outer end portion in the left-right direction) of the second rod 74 is configured as a rod transmission portion 74A serving as a transmission portion. The rod transmission portion 74A is inserted through an insertion portion 24D formed through the handle housing 24 and protrudes to the outside in the left-right direction of the handle housing 24 (see Figure 1 , Figure 2 , Figure 7 (A) and (B) of). Specifically, the insertion portion 24D is located at the middle portion in the up-down direction at the rear end portion of the handle portion 24A and is formed in a substantially rectangular parallelepiped shape having the front-rear direction as the length direction. The rod transmission portion 74A is inserted through the front end portion of the insertion portion 24D. Thus, in the grinding machine 10, a pair of left and right rod transmission portions 74A protrude from the handle portion 24A to both sides in the left-right direction. The protruding amount of the rod transmission portion 74A protruding from the handle portion 24A to the outside in the left-right direction is set to be significantly smaller than the protruding amount of the battery mounting portion 24B protruding from the handle portion 24A to the outside in the left-right direction, and the rod transmission portion 74A is located at a position closer to the inside in the left-right direction than the outer peripheral portion of the battery mounting portion 24B. A connection hole 74B is formed through the rod transmission portion 74A in the up-down direction.

[0071] In the initial state of the rod mechanism portion 70 (motor stop mechanism 60), the right end portion of the second rod 74 is disposed adjacent to the rear side of the left portion at the upper end portion of the first rod 72 (see Figure 4 , Figure 5 and Figure 7 (A) of). On the other hand, when a pulling force of a predetermined value or more to the rear side is transmitted from the following wire 80 to the rod transmission portion 74A, the rod mechanism portion 70 (motor stop mechanism 60) switches from the initial state to the operating state. Specifically, it is set that: using the rotational force generated by the second rod 74 due to the pulling force, the second rod 74 pushes the upper end portion of the first rod 72 forward, and releases the holding state of the magnet 66 on the first rod 72 (see Figure 6 and Figure 7(B) of this embodiment. In addition, the tensile force above the predetermined value in this embodiment is the tensile force transmitted to the second rod 74 when the grinder 10 is suspended by the metal wire 80 described below, and is set to release the holding state of the magnet 66 on the first rod 72 in this state.

[0072] The metal wire 80 is formed in a substantially long strip shape with flexibility. At both ends in the length direction of the metal wire 80, metal wire coupling parts 80A formed in a ring shape are formed, and the metal wire coupling parts 80A are inserted into the coupling holes 74B of the second rod 74. Thus, the metal wire 80 connects the pair of left and right second rods 74 outside the housing 20. That is, both ends in the length direction of the metal wire 80 bent in a U shape are connected to the rear end part of the handle part 24A in a manner that can rotate with the left-right direction as the axis, and the metal wire 80 functions as a hook part for suspending the grinder 10. And, in a state where the metal wire 80 extends rearward from the rod transmission part 74A of the second rod 74, the length of the metal wire 80 is set so that the battery assembly part 24B and the storage battery 34 can be arranged inside the metal wire 80.

[0073] (Function and effect)

[0074] Next, the operation and effect of the grinder 10 of this embodiment will be described.

[0075] When processing is performed using the grinder 10 configured as described above, the operator holds the motor housing part 22A of the motor housing 22 and the handle part 24A of the handle housing 24. And, by the operator sliding the switch lever 14 from the off position to the on position, the sliding lever 16 and the switch lever 14 slide together from the off position to the on position. Thus, the rear end part of the sliding lever 16 pushes the plunger 12B of the motor switch 12 forward, so that the motor switch 12 is turned on. Therefore, the motor 50 is driven by the controller 32, and the main shaft 38 and the grinding wheel 46 rotate. Thus, grinding processing can be performed by the grinder 10. In addition, at the on position of the switch lever 14, the switch lever 14 engages with the motor housing 22, and the grinder 10 is in an on-lock state. To release the on-lock state of the grinder 10, by the operator changing the posture of the switch lever 14, the engagement between the switch lever 14 and the motor housing 22 is released, so that the on-lock state of the grinder 10 is released.

[0076] Also, during the operation of the grinding machine 10, in order to prevent the grinding machine 10 from falling to the ground, for example, a suspension member (not shown) provided at one end of the belt-like member is connected (hooked) to the wire 80 of the motor stop mechanism 60, and one end of the belt-like member is fixed to a surrounding pipe or the like. Thus, assuming that the grinding machine 10 falls out of the operator's hand, the grinding machine 10 is suspended by the wire 80 connected to the suspension member. Also, both ends in the length direction of the wire 80 are connected to the rod transmission portion 74A of the second rod 74 that protrudes outward in the left and right directions from the rear end portion of the handle portion 24A of the grinding machine 10. Therefore, in the suspended state of the grinding machine 10, the grinding machine 10 is suspended with the front side thereof facing the lower side in the vertical direction. Specifically, the wire 80 is pulled backward such that both ends in the length direction of the wire 80 extend outward in the left and right directions and rearward from the rod transmission portion 74A, and a pulling force toward the rear side is applied to the wire 80.

[0077] When a pulling force is applied to the wire 80, the pulling force is transmitted to the rod transmission portion 74A of the second rod 74 of the rod mechanism portion 70. Specifically, the rod transmission portion 74A is pulled rearward by the wire 80, and a rotational force is applied to the second rod 74 such that the inner ends in the left and right directions of the second rod 74 are displaced forward. Therefore, by using this rotational force, the inner ends in the left and right directions of the second rod 74 push the upper end portion of the first rod 72 forward, releasing the holding state of the magnet 66 on the first rod 72. Thus, as shown in (B) of Figure 7 , the first rod 72 rotates forward against the magnetic force of the magnet 66 and pushes the plunger 62B of the detection switch 62. As a result, the detection switch 62 is switched from off to on, and the controller 32 stops the motor 50 in the driving state based on the output signal of the detection switch 62. Thus, in the suspended state of the grinding machine 10, the driving of the motor 50 is restricted.

[0078] As described above, in the motor stop mechanism 60 of the grinding machine 10, the wire 80 is provided outside the housing 20, and the rod mechanism portion 70 is held in the initial state by the magnet 66. Moreover, when a pulling force toward the rear side is applied to the wire 80 in the suspended state of the grinding machine 10, when a pulling force equal to or greater than a predetermined value is transmitted to the rod mechanism portion 70, the holding state of the magnet 66 on the rod mechanism portion 70 is released, and the motor stop mechanism 60 is switched from the initial state to the operating state. Specifically, as described above, the rod mechanism portion 70 (the first rod 72 and the second rod 74) operates, the detection switch 62 is turned on, and the driving of the motor 50 is restricted. Thus, in the suspended state of the grinding machine 10, the driving of the motor 50 can be stopped. Therefore, the convenience of the grinding machine 10 can be improved.

[0079] Moreover, in the motor stop mechanism 60, as described above, since the rod mechanism portion 70 in the initial state is held by the magnetic force of the magnet 66, stabilization of the motor stop mechanism 60 can be achieved. That is, assuming that the rod mechanism portion 70 is held by an elastic member such as a spring, when an excessive tensile force acts on the elastic member, the elastic member may deform. In this case, the holding state of the rod mechanism portion 70 becomes unstable, and the motor stop mechanism 60 may not operate properly. That is, the convenience of the grinding machine 10 may be reduced.

[0080] In contrast, in the present embodiment, as described above, since the rod mechanism portion 70 is held by the magnetic force of the magnet 66, even if, for example, an excessive tensile force is applied to the rod mechanism portion 70, a change in the magnetic force of the magnet 66 can be suppressed. That is, a decrease in the holding force of the magnet 66 on the rod mechanism portion 70 can be suppressed, and the rod mechanism portion 70 can be stably held. Therefore, the drive stop function of the motor stop mechanism 60 on the motor 50 can be maintained well. In summary, according to the grinding machine 10 of the present embodiment, convenience can be improved.

[0081] Moreover, since the rod mechanism portion 70 is held by the magnet 66, compared with a structure in which the rod mechanism portion 70 is held by an elastic member such as a spring, the rod mechanism portion 70 can be held with a simple structure, and miniaturization of the motor stop mechanism 60 can be facilitated.

[0082] Moreover, in the motor stop mechanism 60, there is a detection switch 62. By applying a tensile force equal to or greater than a predetermined value to the rod mechanism portion 70, the rod mechanism portion 70 held by the magnet 66 operates to turn on the detection switch 62. Thereby, the hanging state of the grinding machine 10 can be detected with a simple structure, and driving of the motor 50 can be restricted.

[0083] Moreover, in the rod mechanism portion 70, there is a first rod 72 held by the magnet 66 and a second rod 74 to which a tensile force is applied. Moreover, the second rod 74 rotates due to the tensile force, thereby releasing the holding state of the magnet 66 on the first rod 72, and the first rod 72 presses the plunger 62B of the detection switch 62. Thereby, the detection switch 62 can be turned on and off by the rod mechanism portion 70 having a simple structure.

[0084] Moreover, the rod mechanism portion 70 has a pair of left and right second rods 74. That is, a plurality of transmission portions for transmitting the tensile force generated when the grinding machine 10 is hung are provided to the rod mechanism portion 70. Therefore, by applying a pulling load to the second rod 74 at any one of the two portions, the rod mechanism portion 70 can be operated to restrict driving of the motor 50. Therefore, the operation of the motor stop mechanism 60 can be further stabilized.

[0085] In addition, rod transfer portions 74A of a pair of second rods 74 are disposed outside the housing 20, and a long and narrow metal wire 80 is connected to the rod transfer portions 74A. Thus, the metal wire 80 can be connected to the suspension member with a simple structure, and the grinder 10 can be suspended.

[0086] In addition, the magnet 66 is held by the magnet holding portion 64B of the support 64, and the second rod 74 of the rod mechanism portion 70 is supported by the support 64 so as to be rotatable. Thus, the magnet 66, the support 64, and the second rod 74 can be assembled in a unitized state to the handle housing 24. Therefore, the assemblability of the motor stop mechanism 60 assembled to the handle housing 24 can be improved.

[0087] In addition, the handle housing 24 has housing members 24L and 24R that are divided in the left-right direction, and the support 64 is clamped by the housing members 24L and 24R from both sides in the left-right direction. That is, by assembling the housing members 24L and 24R to each other, the support 64 can be assembled to the handle housing 24. Thus, the assemblability of the motor stop mechanism 60 can be further improved.

[0088] In addition, the housing 20 of the grinder 10 is formed in a long and narrow shape extending in the front-rear direction, and a transmission mechanism such as a main shaft 38 for transmitting the driving force of the motor 50 to the grinding wheel 46 (tip tool) is provided at the front end portion (gear housing 26) of the housing 20. And the rear end portion of the housing 20 is configured as a battery mounting portion 24B, and the storage battery 34 is mounted on the battery mounting portion 24B from above. Here, the detection switch 62 and the rod mechanism portion 70 in the motor stop mechanism 60 are located on the front side of the battery mounting portion 24B and on the rear side of the motor 50. Therefore, even when the rear end portion of the grinder 10 is constituted by the storage battery 34, the suspension state of the grinder 10 can be detected by the detection switch 62 and the rod mechanism portion 70, and the driving of the motor 50 can be restricted. Therefore, the convenience of the grinder 10 whose rear end portion is constituted by the storage battery 34 can be improved.

[0089] Moreover, as described above, the rod transfer portion 74A of the second rod 74 protrudes toward both sides in the left - right direction of the handle housing 24, and both end portions in the longitudinal direction of the long - strip - shaped wire 80 are connected to the rod transfer portion 74A. And, in a state where the wire 80 extends rearward from the second rod 74, the length of the wire 80 is set such that the battery 34 can be disposed inside the wire 80. That is, even when the battery 34 forms the rear end portion of the grinder 10, the wire 80 extending rearward from the rod transfer portion 74A can be disposed on both sides in the left - right direction of the battery 34, making the grinder 10 in a good hanging state. In addition, in the present embodiment, as the hooking member, a flexible wire 80 is adopted, but the hooking member is not limited thereto. For example, a steel material with relatively high rigidity can be bent into a U - shape, and its end portion can be connected to the rod transfer portion 74A. In the present invention, it is important that the hooking member can be located at a position surrounding the battery 34 (a state where the rear end of the hooking member is located rearward of the rear end of the battery 34) and can be located at a position not overlapping with the battery 34 (state) when observed in the assembly direction of the battery 34, and the material and structure of the hooking member can also be selected from various materials and structures. In this way, even in a state where the hooking member extends rearward, the loading and unloading of the battery 34 can be smoothly performed.

[0090] And, the rod transfer portion 74A of the second rod 74 protrudes from the handle portion 24A toward both sides in the left - right direction, and the battery 34 is assembled from above to the battery assembly portion 24B. That is, when observed from the front - rear direction, the rod transfer portion 74A protrudes from the handle portion 24A toward both sides in the crossing direction (left - right direction) crossing the assembly direction of the battery 34. Therefore, even when the wire 80 extends rearward from the rod transfer portion 74A, interference between the battery 34 and the wire 80 can be suppressed, and the battery 34 can be assembled to the battery assembly portion 24B. Therefore, the wire 80 can be disposed outside the housing 20 without hindering the assemblability of the battery 34.

[0091] And, the outer peripheral portion of the battery assembly portion 24B is located at a position outside the rod transfer portion 74A of the second rod 74 in the left - right direction. Therefore, it is possible to suppress the amount of protrusion of the rod transfer portion 74A protruding from the handle portion 24A from becoming too large, and the pair of rod transfer portions 74A can be connected by the wire 80.

[0092] In addition, in the above description, it has been described that the motor stop mechanism 60 is switched from the initial state to the operating state to stop the motor 50 in the driving state. However, when the motor stop mechanism 60 is switched to the operating state when the motor 50 is in the stopped state, even if the motor switch 12 is turned on, the stopped state of the motor 50 is maintained. That is, the driving of the motor 50 is restricted.

[0093] (Second Embodiment)

[0094] Next, Figures 8 to 14 the grinding machine 100, which is a working machine of the second embodiment, will be described. The grinding machine 100 is configured in the same manner as the grinding machine 10 of the first embodiment, except for the aspects shown below. In addition, Figures 8 to 14 in the following, the same reference numerals are given to the components configured in the same manner as those of the first embodiment.

[0095] That is, as Figures 8 to 10 shown, in the grinding machine 100, the rear end portion of the housing 20 is formed by the tail cover 28 instead of the handle housing 24. The tail cover 28 is formed in a substantially bottomed cylindrical shape that is open toward the front side and is fixed to the switch holding portion 22B of the motor housing 22. A power cord 102 is provided on the tail cover 28, and the power cord 102 extends rearward from the rear wall of the tail cover 28. The power cord 102 is configured to be connectable to an AC power supply and is electrically connected to the motor 50 and the motor switch 12. That is, the storage battery 34 is omitted in the grinding machine 100.

[0096] In the grinding machine 100, a motor stop mechanism 110 is provided instead of the motor stop mechanism 60 of the first embodiment. The motor stop mechanism 110 is configured to include a motor switch 12, a slide bar 16, a magnet 66, a slide connecting member 112, and a motor stop lever 114 as a hooking member. And, the slide bar 16 of the grinding machine 100 is composed of a first slide member 17 and a second slide member 18 that are divided into two parts. Moreover, the motor switch 12, the first slide member 17, the second slide member 18, and the slide connecting member 112 correspond to the motor drive restricting portion of the present application. Hereinafter, the motor stop mechanism 110 will be described.

[0097] (Regarding the slide bar 16)

[0098] In the slide bar 16, the second slide member 18 forms the rear end portion of the slide bar 16 and is connected to the rear end portion of the first slide member 17. The rear end portion of the first slide member 17 is disposed close to the left side of the motor switch 12. A engaging piece 17A having the front-rear direction as the plate thickness direction is provided at the rear end portion of the first slide member 17, and the engaging piece 17A protrudes to the left side from the first slide member 17. An inclined portion 17B is formed at the rear side corner portion of the lower end portion of the engaging piece 17A, and the inclined portion 17B inclines rearward as it goes upward when viewed from the left side. A pair of upper and lower rail portions 17C ( Figures 8 to 10 only the upper rail portion 17C is shown in the figure) are provided at the rear end portion of the first slide member 17 and on the rear side of the engaging piece 17A. The pair of upper and lower rail portions 17C are formed in a groove shape that extends in the front-rear direction and is open inward in the up-down direction, and the rear end portion of the rail portion 17C is open.

[0099] The second sliding member 18 is formed in a substantially L-shaped plate shape when viewed from above. Specifically, the second sliding member 18 is configured to include a main body portion 18A extending in the front-rear direction and a switch pressing portion 18B extending to the right from the rear end portion of the main body portion 18A. Further, the main body portion 18A is inserted into the rail portion 17C of the first sliding member 17 from the rear side, and the second sliding member 18 is connected to the first sliding member 17 so as to be slidable in the front-rear direction. Further, in the initial state of the motor stop mechanism 110, the second sliding member 18 is located at the connection position ( Figures 8 to 10 the position shown), and is connected to the first sliding member 17 by the following sliding connection member 112 so as not to be relatively movable, and a structure that prohibits the second sliding member 18 from sliding relative to the first sliding member 17 is formed. On the other hand, in the operating state of the motor stop mechanism 110, the connection between the second sliding member 18 and the first sliding member 17 based on the sliding connection member 112 is released, and a structure that allows the second sliding member 18 to slide rearward relative to the first sliding member 17 is formed.

[0100] A magnet holding portion 18C is provided between the upper and lower pair of rail portions 17C in the main body portion 18A of the second sliding member 18. The magnet holding portion 18C is formed in a substantially rectangular parallelepiped shape, protrudes to the left from the main body portion 18A, and is disposed adjacent to the rear side of the engagement piece 17A. A magnet 66 is provided in the magnet holding portion 18C. The magnet 66 is arranged with the vertical direction as the axial direction, the upper portion of the magnet 66 is buried in the magnet holding portion 18C, and the lower portion of the magnet 66 protrudes downward from the magnet holding portion 18C. A connecting shaft 18D is provided in the main body portion 18A and on the rear side of the magnet holding portion 18C. The connecting shaft 18D is formed in a substantially cylindrical shape with the left-right direction as the axial direction and protrudes to the left from the main body portion 18A.

[0101] The switch pressing portion 18B is disposed adjacent to the rear side of the plunger 12B of the motor switch 12. Further, when the switch lever 14 slides to the ON position, the plunger 12B is pressed by the switch pressing portion 18B.

[0102] (Regarding the sliding connection member 112)

[0103] The sliding connection member 112 is made of a magnetic material. The sliding connection member 112 extends in the front-rear direction and is disposed adjacent to the lower side of the magnet 66. Thus, the sliding connection member 112 is held by the magnetic force of the magnet 66. A supported portion 112A protruding upward is provided at the rear end portion of the sliding connection member 112, and the supported portion 112A is supported by the connecting shaft 18D of the second sliding member 18 so as to be rotatable. Thus, the sliding connection member 112 is connected to the second sliding member 18 so as to be rotatable about the left-right direction as an axis. An engaging hook portion 112B protruding upward is provided at the front end portion of the sliding connection member 112. The engaging hook portion 112B is disposed adjacent to the front side of the engaging piece 17A of the first sliding member 17. Thus, the engaging hook portion 112B and the engaging piece 17A are engaged in the front-rear direction, and the second sliding member 18 and the first sliding member 17 are connected so as not to relatively move in the front-rear direction. An inclined portion 112C is formed at the front side corner portion of the engaging hook portion 112B, and the inclined portion 112C is inclined rearward as it faces upward when viewed from the left side. A sliding transmission portion 112D serving as a transmission portion is provided at the rear end portion of the sliding connection member 112. The sliding transmission portion 112D extends downward from the sliding connection member 112 and bends to the left side. The sliding transmission portion 112D is located below the connecting shaft 18D of the second sliding member 18.

[0104] (Regarding the motor stop lever 114)

[0105] The motor stop lever 114 is formed in a substantially long plate shape extending in the front-rear direction with the left-right direction as the plate thickness direction. A bent portion 114A bent into a substantially crank shape is formed at the intermediate portion in the front-rear direction of the motor stop lever 114, and the front end portion of the motor stop lever 114 is disposed at a position offset to the left side with respect to the rear end portion of the motor stop lever 114. The motor stop lever 114 is housed in the tail cover 28 except for its rear end portion, and the front end portion of the motor stop lever 114 is disposed adjacent to the left side of the sliding connection member 112. The rear end portion of the motor stop lever 114 is inserted through a rod hole (not shown) formed in the rear wall of the tail cover 28 and protrudes rearward from the tail cover 28. A rectangular connecting hole 114B is formed through the rear end portion of the motor stop lever 114, and a suspension member is inserted into the connecting hole 114B to connect the motor stop lever 114 and the suspension member.

[0106] The motor stop lever 114 is slidably supported at the rear end portion of the switch holding portion 22B in the front-rear direction. A cutout portion 114C opening downward is formed at the front end portion of the motor stop lever 114. Thus, a rod hook portion 114D protruding downward is formed at the front end portion of the motor stop lever 114.

[0107] Moreover, as Figures 8 to 10As shown, at the disconnection position of the sliding rod 16 in the initial state of the motor stop mechanism 110, the sliding transmission part 112D of the sliding connection member 112 is disposed at the rear end portion of the notch part 114C. In this state, when the sliding rod 16 is slid toward the connection position, as Figure 11 shown, the sliding transmission part 112D is disposed at the front end portion of the notch part 114C. That is, maintaining the initial state of the sliding connection member 112 in the motor stop mechanism 110 unchanged, the motor switch 12 is turned on, and the motor 50 is driven.

[0108] Moreover, when the grinding machine 100 is in a suspended state and a pulling force toward the rear side is input to the rear end portion of the motor stop lever 114, the lever hook part 114D of the motor stop lever 114 engages with the sliding transmission part 112D of the sliding connection member 112, and the sliding transmission part 112D is pushed toward the rear side. Since the sliding transmission part 112D is located below the connection shaft 18D, when viewed from the left side, a rotational force in the counterclockwise direction acts on the sliding connection member 112. And at this time, a pulling force toward the rear side exceeding a predetermined value is transmitted from the motor stop lever 114 to the sliding connection member 112. Therefore, as Figure 12 shown, the holding state of the sliding connection member 112 by the magnet 66 is released, and the sliding connection member 112 rotates downward. Thereby, the engaged state between the engaging hook part 112B of the sliding connection member 112 and the engaging piece 17A of the first sliding member 17 is released, and the second sliding member 18 is allowed to slide toward the rear side relative to the first sliding member 17.

[0109] As Figure 13 shown, when the sliding of the second sliding member 18 relative to the first sliding member 17 is allowed, the restoring force toward the rear side of the plunger 12B in the motor switch 12 acts on the switch pressing part 18B of the second sliding member 18, so that the second sliding member 18 and the sliding connection member 112 slide toward the rear side together. Thereby, the motor switch 12 is turned off, and the driving motor 50 stops. At this time, due to the movement of the sliding connection member 112 toward the rear side, the sliding transmission part 112D separates from the rear side of the lever hook part 114D of the motor stop lever 114. Therefore, the sliding connection member 112 rotates in the clockwise direction by the magnetic force of the magnet 66, and the magnet 66 holds the sliding connection member 112 again.

[0110] In this state, if, in order to reset the switch lever 14 and the first sliding member 17 to the disconnection position, an operator slides the switch lever 14 toward the rear side, then as Figure 14As shown, the inclined portion 17B of the engaging piece 17A of the first sliding member 17 presses the inclined portion 112C of the engaging hook portion 112B of the sliding connection member 112, causing the sliding connection member 112 to rotate downward. That is, the holding state based on the magnet 66 is released. Then, the engaging piece 17A passes over the engaging hook portion 112B, and thus the sliding connection member 112 rotates clockwise due to the magnetic force of the magnet 66, and the magnet 66 holds the sliding connection member 112 again. That is, the motor stop mechanism 110 returns to Figures 8 to 10 its initial state.

[0111] Thus, also in the second embodiment, when the grinder 100 is in the suspended state, a pulling force is input to the motor stop lever 114 toward the rear side. When a pulling force greater than a predetermined value is transmitted to the sliding connection member 112, the holding state of the magnet 66 on the sliding connection member 112 is released, and the motor stop mechanism 110 switches from the initial state to the operating state. Specifically, as described above, in the holding state of the magnet 66 on the sliding connection member 112, the second sliding member 18 and the first sliding member 17 are connected in a non-relatively movable manner. When the holding state of the magnet 66 on the sliding connection member 112 is released, the second sliding member 18 is allowed to slide relative to the first sliding member 17 toward the rear side. Thereby, in the on state of the motor switch 12, the plunger 12B and the second sliding member 18 move together toward the rear side, and the motor switch 12 switches to the off state. Thus, in the suspended state of the grinder 10, the driving of the motor 50 can be stopped. Therefore, also in the second embodiment, the convenience of the grinder 100 can be improved, the same as in the first embodiment.

[0112] Moreover, in the motor stop mechanism 110 of the second embodiment, the detection switch 62 of the motor stop mechanism 60 of the first embodiment is not provided. Thereby, the cost reduction of the motor stop mechanism 110 can be facilitated.

[0113] In addition, in the motor stop mechanism 60 of the first embodiment, it is configured to detect the suspended state of the grinder 10 (the fall of the grinder 10) by turning on the detection switch 62 and stop the motor 50. However, the motor 50 can also be stopped by turning off the detection switch 62. In this case, the detection switch 62 can also be disposed behind the first lever 72 and configured to be reversed in the front-rear direction.

[0114] Further, in the motor stop mechanism 60 of the first embodiment, the pair of left and right second rods 74 are provided in the rod mechanism portion 70. However, in the rod mechanism portion 70, one of the pair of left and right second rods 74 may be omitted. In this case, in the handle portion 24A, one of the insertion portions 24D may also be omitted, and a hook portion of the wire coupling portion 80A for hooking the wire 80 is formed in the handle portion 24A. Further, in this case, the first rod 72 may be configured to be omitted, and the detection switch 62 may be directly pressed by the second rod 74. Further, in the structure in which the detection switch 62 is directly pressed by the second rod 74, the second rod 74 is made of a magnetic body, and the second rod 74 is held by the magnet 66 in the initial state of the motor stop mechanism 60.

[0115] Further, in the motor stop mechanism 60 of the first embodiment, the detection switch 62 and the rod mechanism portion 70 are provided in the handle portion 24A of the handle housing 24, but the detection switch 62 and the rod mechanism portion 70 may be configured to be provided in the battery mounting portion 24B. In this case, for example, the battery mounting portion 24B may be configured to extend forward, and the rod transmission portion 74A of the second rod 74 may protrude from both left and right side portions of the battery mounting portion 24B.

[0116] Reference Signs

[0117] 10—Disc grinder (working machine), 12—Motor switch (motor drive restricting portion), 17—First sliding member (motor drive restricting portion), 18—Second sliding member (motor drive restricting portion), 20—Housing, 24B—Battery mounting portion, 30A—Terminal, 34—Storage battery (battery), 50—Motor, 62—Detection switch (motor drive restricting portion, tensile force detection portion), 64—Support, 70—Rod mechanism portion (moving portion, motor drive restricting portion, tensile force detection portion), 72—First rod (first moving member), 74—Second rod (second moving member), 74A—Rod transmission portion (transmission portion), 80—Wire (hooking member), 100—Grinder (working machine), 112—Sliding connection member (motor drive restricting portion), 114—Motor stop rod (hooking member).

Claims

1. An operating machine, characterized in that, Comprising: A motor; A housing that houses the above-mentioned motor; A hooking member, at least a part of which is disposed outside the above-mentioned housing; A magnet that is provided inside the above-mentioned housing; and A motor drive restricting portion that is held by the above-mentioned magnet and operates by releasing the holding state based on the above-mentioned magnet using a pulling force equal to or greater than a predetermined value transmitted from the above-mentioned hooking member to restrict the drive of the above-mentioned motor.

2. The working machine according to claim 1, wherein The above-mentioned motor drive restricting portion is configured to include: A moving portion that is movably provided inside the above-mentioned housing and is held in an initial state by the above-mentioned magnet; and A detection switch that detects the transmission of the above-mentioned pulling force to the above-mentioned moving portion, Transmitting the above-mentioned pulling force to the above-mentioned moving portion, so that the above-mentioned moving portion moves from the initial state, causing the above-mentioned detection switch to turn on or off, thereby switching the above-mentioned motor to a stopped state.

3. The working machine according to claim 2, wherein The above-mentioned moving portion has: A first moving member that is held by the above-mentioned magnet and turns the above-mentioned detection switch on or off by moving; and A second moving member that is connected to the above-mentioned hooking member and is transmitted the above-mentioned pulling force to move, thereby releasing the holding state of the above-mentioned magnet on the above-mentioned first moving member.

4. The working machine according to claim 3, wherein The above-mentioned moving portion has a pair of the above-mentioned second moving members.

5. The working machine according to claim 4, wherein The above-mentioned hooking member is a long strip-shaped metal wire, Both end portions in the length direction of the above-mentioned metal wire are connected to the above-mentioned second moving member.

6. The working machine according to claim 2, wherein A support for holding the above-mentioned magnet is provided inside the above-mentioned housing, The above-mentioned moving portion is supported by the above-mentioned support so as to be movable.

7. The working machine according to claim 6, wherein The above-mentioned housing has a divided housing member, The above-mentioned support is clamped by the above-mentioned housing member and assembled to the above-mentioned housing member.

8. The working machine according to claim 1, wherein The above-mentioned motor drive restricting portion is configured to include: A motor switch that switches the above-mentioned motor to a driving state or a stopped state; A first sliding member that is input with an operating force to slide; A second sliding member that is connected to the above-mentioned first sliding member and slides together with the above-mentioned first sliding member to turn on the above-mentioned motor switch; and A sliding connection member that is held by the above-mentioned magnet, connects the above-mentioned second sliding member and the above-mentioned first sliding member in a non-relative movable manner, and operates using the above-mentioned pulling force transmitted from the above-mentioned hooking member to allow relative movement of the above-mentioned second sliding member with respect to the first sliding member.

9. The working machine according to claim 8, wherein The above-mentioned sliding connection member is movably provided on the above-mentioned second sliding member and engages with the above-mentioned first sliding member to connect the above-mentioned second sliding member and the first sliding member in a non-relative movable manner, When the above-mentioned sliding connection member operates, the engagement state between the above-mentioned sliding connection member and the above-mentioned first sliding member is released.

10. A working machine, characterized in that, Comprising: A motor having a rotating shaft; A housing that houses the above-mentioned motor; A battery holding part, which is provided on the above-mentioned housing and holds a battery that supplies power to the above-mentioned motor; A hooking member, at least a part of which is arranged outside the above-mentioned housing; A tensile force detection part, which is provided on the above-mentioned battery holding part or at a position on the above-mentioned housing closer to the motor side than the above-mentioned battery holding part, and detects a tensile force equal to or greater than a predetermined value transmitted from the above-mentioned hooking member; and A control part, which restricts the driving of the above-mentioned motor based on the detection result of the above-mentioned tensile force detection part.

11. The working machine according to claim 10, characterized in that The above-mentioned tensile force detection part at least detects a tensile force in a direction away from the above-mentioned motor.

12. The working machine according to claim 10, characterized in that The above-mentioned tensile force detection part has a moving part movably arranged inside the above-mentioned housing and held by a magnet, The above-mentioned moving part has a transmission part connected to the above-mentioned hooking member, When viewed from the axial direction of the above-mentioned motor, the above-mentioned transmission part protrudes from the above-mentioned housing in a crossing direction crossing the assembly direction in which the above-mentioned battery is assembled to the above-mentioned battery holding part.

13. The working machine according to claim 12, characterized in that The above-mentioned transmission part protrudes from the above-mentioned housing to both sides in the above-mentioned crossing direction.

14. The working machine according to claim 13, characterized in that One end of the above-mentioned hooking member is connected to the above-mentioned transmission part protruding to one side in the above-mentioned crossing direction, and the other end is connected to the above-mentioned transmission part protruding to the other side in the above-mentioned crossing direction, The above-mentioned hooking member is configured to be able to be located at a position surrounding the above-mentioned battery and a position where the above-mentioned hooking member does not overlap with the above-mentioned battery when viewed in the battery assembly direction.

15. The working machine according to claim 14, characterized in that When viewed from the axial direction of the above-mentioned motor, the outer peripheral part of the above-mentioned battery holding part is located at a position outside the above-mentioned transmission part in the above-mentioned crossing direction.

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