Work machine

Abstract

The present invention improves workability of a work machine. A blower comprises a motor, an operation unit that can be moved from an initial position by the operation of an operator, and a control unit that controls driving of the motor in accordance with the operating state of the operation unit and that can detect the position of the operation unit. The control unit performs switching control to a plurality of action modes including a normal mode and an always-on mode. Provided is a configuration in which: in the normal mode, the control unit drives the motor when the operation unit is positioned in an on region and stops driving the motor when the operation unit is positioned in an off region; in the always-on mode, the control unit drives the motor regardless of the position of the operation unit; if a switching action is performed including positioning the operation unit in the on region multiple times in the normal mode, the control unit switches to the always-on mode; and in the always-on mode, the motor rotational speed can be set in accordance with the movement amount of the operation unit from the initial position during the switching action.

Description

Work equipment

[0001] The present invention relates to a work machine such as a blower.

[0002] One example of a work machine is a blower that has a fan that rotates using the driving force of a motor, a housing that houses the motor and the fan, and a nozzle that discharges air along the airflow generated by the rotation of the fan.

[0003] For example, Patent Document 1 discloses a blower whose rotation speed can be changed according to the amount of operation of a trigger. This blower is locked when a tactile switch provided separately from the trigger is operated.

[0004] JP 2014-36939 A

[0005] The configuration of the blower (work machine) described in the above-mentioned Patent Document 1 requires the operator to operate both a trigger and a tactile switch to lock the vehicle, so there was room for further improvement in the configuration to improve operability when locking the vehicle. Also, providing two operating parts, a trigger and a tactile switch, led to an increase in the size of the work machine, so there was room for further simplification of the configuration.

[0006] Other objects of the present invention will become apparent from the following description of the embodiments.

[0007] A work machine according to the present invention includes a motor, an operating unit that can be moved from an initial position by an operator's operation, and a control unit that controls the drive of the motor depending on the operating state of the operating unit and can detect the position of the operating unit. The control unit controls switching between multiple operating modes including a normal mode and an on-lock mode. Specifically, in the normal mode, the control unit drives the motor while the operating unit is in the on region and stops the drive of the motor while the operating unit is in the off region. In the on-lock mode, the control unit drives the motor at a fixed rotation speed regardless of the position of the operating unit. Furthermore, when a switching operation is performed in the normal mode, including multiple times when the operating unit is in the on region, the control unit switches to the on-lock mode, and in the on-lock mode, controls the operation of the motor so that the motor rotation speed is fixed depending on the amount of movement of the operating unit from the initial position during the switching operation.

[0008] According to the present invention, the workability of a work machine can be improved.

[0009] FIG. 1 is a side view showing the structure of a work machine according to a first embodiment of the present invention. FIG. 2 is a side cross-sectional view showing the internal structure of the work machine shown in FIG. 1. FIG. 3 is a side view showing the work machine shown in FIG. 1 with the main nozzle removed. FIG. 4 is a block circuit diagram showing the configuration of a control system for the work machine shown in FIG. 1. FIG. 5 is a diagram outlining operation in normal mode and on-lock mode and state transitions between these modes. FIG. 6 is a time chart for comparatively explaining the relationship between the duty ratio and motor rotation speed relative to the amount of pulling of the trigger. FIG. 7 is a flowchart illustrating the control operation of a control unit.

[0010] An embodiment of the present invention will be described in detail below with reference to the drawings. In this embodiment, a blower 1 will be described as an example of a work machine. As shown in Fig. 1, the blower 1 is a work machine that takes in air from the rear side and discharges it from a nozzle provided on the front side, thereby blowing the air onto a work area, and is also called an air duster.

[0011] The configuration of the blower 1 will be described as follows: it comprises a motor 10, a fan 10a that rotates by the driving force of the motor 10 and generates an air flow F1 in an axial direction C1 along the rotation axis of the motor 10, a housing portion 2 that houses the motor 10 and the fan 10a and has an exhaust portion 12 on the front (one) side in the axial direction C1, and a main nozzle (nozzle portion) 6 that is formed in a cylindrical shape and is detachably attached to the exhaust portion 12.

[0012] The housing portion 2 includes a motor case (first housing portion) 3 that houses the motor 10 and fan 10a and has an exhaust portion 12, a handle portion 4 that extends from the motor case 3 along a direction (up and down direction) that intersects with the axial direction C1, and a battery attachment portion (second housing portion) 5 that is connected to the handle portion 4 so as to be located on the opposite side of the motor case 3 across the handle portion 4.

[0013] In other words, the motor case 3 and the battery attachment section 5 extend along the axial direction C1 so as to be approximately parallel to each other at both ends of the handle section 4. That is, one end of the handle section 4 is connected to the motor case 3, and the other end of the handle section 4 is connected to the battery attachment section 5. The housing section 2 has two housing halves molded from a synthetic resin such as nylon or polycarbonate, and the housing section 2 is assembled by butting together these two housing halves.

[0014] In the blower 1 of this embodiment, the direction along the rotation shaft of the motor 10 is referred to as the axial direction C1 and is also referred to as the front-rear direction, and the direction that intersects with the front-rear direction and in which the handle portion 4 extends (extension direction E1) is referred to as the up-down direction. Furthermore, the direction that is perpendicular to the front-rear direction and the up-down direction is referred to as the left-right direction.

[0015] As shown in Figure 2, a motor 10 and a fan 10a are housed within the motor case 3. The motor 10 has a stator 10b, which is a coil, and a rotor 10c, which is a magnet, and is, for example, a brushless motor. The fan 10a is a centrifugal fan attached to the rotating shaft of the rotor 10c, and sends air taken in from an intake section 11 at the rear of the motor case 3 toward a main nozzle 6 attached to the front side of the motor case 3. Specifically, within the motor case 3, the motor 10 including the fan 10a is provided in a cylindrical container. The main nozzle 6 is an example of a nozzle.

[0016] The motor 10, by rotating the fan 10a, takes in air through the mesh portion 11a of the intake portion 11 and sends the taken-in air along the inner wall 10d of the cylindrical container toward the main nozzle 6. At this time, the rotation of the fan 10a generates an air flow F1 that flows along the axial direction C1, and the air sent by the air flow F1 is discharged from the tip of the main nozzle 6.

[0017] In addition, the motor 10 is fitted with a motor board 10e which is equipped with an inverter circuit for the motor 10 and a sensor for detecting the rotational position of the rotor 10c, and this motor board 10e is also housed within the motor case 3.

[0018] The handle portion 4 is provided on the motor case 3 side so as to protrude forward (to one side) in the axial direction C1, and has a trigger (operation portion) 9 that can be pressed (pulled by gripping) by an operator (not only a human but also a robot, etc.). The trigger 9 can move back and forth integrally with a trigger switch 9A, which will be described later in Fig. 4, and is configured to be able to detect the amount of operation (pulling amount) of the trigger (see trigger switch detection amount detector 87 and control portion 100 shown in Fig. 4 as appropriate).

[0019] Furthermore, a control board 8 equipped with a microcomputer is provided inside the handle portion 4. A battery pack 7 that supplies power to a motor 10 is detachably attached to the battery attachment portion 5. Therefore, when the trigger 9 is operated, the driving force of the motor 10 rotates the fan 10a, and the rotation of the fan 10a generates an airflow F1 in the axial direction C1. In this way, air taken in through the rear intake portion 11 is sent forward as the airflow F1 and discharged from the tip of the main nozzle 6.

[0020] 2, a protruding portion 15 that protrudes forward from the motor case 3 is provided directly below the exhaust portion 12 of the motor case 3. The protruding portion 15 includes an LED 17 that brightly illuminates the area where air is blown, and an adjacent upper holding portion (first holding portion) 13. In other words, by providing the LED 17 on the protruding portion 15 that protrudes forward from the motor case 3, the work area can be brightened.

[0021] Next, the structure of the main nozzle 6 provided in the blower 1 will be described with reference to Figures 1 to 3. The main nozzle 6 is formed in a cylindrical shape, with the diameter of one end portion being larger than the diameter of the other end portion.

[0022] Specifically, the base end portion (other end portion) 6b attached to the exhaust section 12 of the motor case 3 shown in Figure 2 has an intake port 6d as a nozzle, and the tip end portion (one end portion) 6a located opposite the base end portion 6b has an exhaust port 6e as a nozzle. The base end portion 6b of the main nozzle 6 is wider than the tip end portion 6a, tapering toward the tip. Therefore, the diameter D2 of the intake port 6d in the base end portion 6b is greater than the diameter D1 of the exhaust port 6e in the tip end portion 6a. A convex portion (see Figure 2) is formed on the outer periphery of the base end portion 6b.

[0023] Fig. 3 is a side view showing a state in which the main nozzle has been removed from the work machine shown in Fig. 1. As shown in Fig. 3, in the blower 1 of this embodiment, the main nozzle 6 removed from the exhaust section 12 can be fitted (in other words, housed) in the motor case 3.

[0024] When attaching the main nozzle 6 to the exhaust section 12 of the motor case 3, the protrusion on the base end portion 6b of the main nozzle 6 is fitted into a groove (not shown in detail) provided in the exhaust section 12 and the base end portion 6b is rotated, thereby attaching the main nozzle 6 to the motor case 3. The main nozzle 6 is made of, for example, hard rubber.

[0025] Fig. 4 is a block circuit diagram showing the configuration of the control system of the work machine shown in Fig. 1. As shown in Fig. 4, the blower 1 has a configuration in which the motor output unit 30, the battery pack 7, and the board unit 80 are electrically connected to each other.

[0026] Of these, the motor output unit 30 includes the motor 10 described above and a motor control unit 31 for controlling the power supplied to the motor 10 and, ultimately, the operation of the motor 10. The motor control unit 31 controls the operation (rotation mode) of the motor 10 based on a control signal output from a control signal output circuit 82, which will be described later. The motor control unit 31 also detects the rotation speed of the motor 10 and supplies the detection result to the control unit 100 via the rotation speed detection circuit 81.

[0027] The battery pack 7 is, for example, a rechargeable secondary battery (such as a lithium ion battery), and as shown in FIG. 4, has a structure in which a plurality of batteries are connected in series and housed (packed) in a predetermined container or the like.

[0028] The board unit 80 mainly includes a plurality of circuits mounted on the control board 8. Specifically, the board unit 80 includes connectors 88 and 89 connected to the trigger switch 9A of the trigger (operation unit) 9, and a rotation speed detection circuit 81 and a control signal output circuit 82 connected to the motor control unit 31 of the motor output unit 30.

[0029] As shown in FIG. 4, the board unit 80 also includes a current detection circuit 83, a power switch circuit 84, a power supply circuit 85, a trigger switch operation detection circuit 86, a trigger switch operation amount detection unit 87, and a control unit 100 that controls each of the circuits (each block) described above.

[0030] The current detection circuit 83 is connected to the battery pack 7 and the negative side of the motor control unit 31 in the motor output unit 30, and outputs the detected current value to the control unit 100. The power switch circuit 84 is connected to the battery pack 7, and outputs whether a main power switch (not shown) is on or off to the power supply circuit 85. When the power supply circuit 85 receives a signal from the power switch circuit 84 indicating that the main power switch is on, it applies a predetermined voltage to the control unit 100.

[0031] The trigger switch operation detection circuit 86 detects whether the trigger switch 9A is operated or not, and outputs the detection result to the control unit 100. The trigger switch operation amount detection unit 87 detects the operation amount of the trigger switch 9A (which roughly corresponds to the amount of pulling of the trigger 9A), and outputs the detection result to the control unit 100.

[0032] The control unit 100 is a hardware processor such as a CPU or a microcomputer. The control unit 100 outputs a control signal to the motor control unit 31 through the control signal output circuit 82 in accordance with the detection results of the trigger switch operation detection circuit 86 and the trigger switch operation amount detection unit 87.

[0033] Next, a conventional configuration relating to on-lock drive and an outline of the main parts of this embodiment will be described.

[0034] In conventional work machines, the on-lock drive is configured as follows: For example, when a trigger lock switch (the above-mentioned tactile switch) (not shown) is turned on and the trigger 9 is pulled, for example, to the maximum extent, the rotation speed of the motor 10 is controlled to be fixed regardless of the amount of operation (pulling) of the trigger 9, thereby performing the on-lock drive. The trigger lock switch may be either an electrical or mechanical configuration.

[0035] However, the conventional configuration described above is costly due to the use of a trigger lock switch. Furthermore, the conventional configuration described above is likely to leave room for improvement in terms of the ease of operation (complexity of operation) required for the operator when switching to on-lock drive. Furthermore, the conventional configuration described above is likely to limit (or hinder) the development of a multi-stage on-lock drive, in other words, a specification that fixes the rotation speed of the motor 10 in multiple stages.

[0036] Therefore, in this embodiment, the following configuration is devised and adopted for on-lock drive.

[0037] Generally, in the work machine of this embodiment, when the trigger (operating unit) 9 is operated (pulled) by the operator multiple times within a short period of time, the rotation speed of the motor 10 is fixed according to the amount of pulling during the operation, thereby performing on-lock drive.

[0038] More specifically, the work machine of this embodiment is configured so that the rotation of the motor 10 can be switched between a plurality of operating modes, in this case two modes: a normal mode and an on-lock mode, under the control of the above-mentioned control unit 100. Note that although other modes (third and subsequent modes) may be provided as "multiple operating modes," explanations of the third and subsequent modes will be omitted to avoid an increase in the number of pages and a complicated explanation.

[0039] In addition, in the work machine of this embodiment, in normal mode, the control unit 100 drives the motor 10 while the trigger (operation unit) 9 is located in the on region, and controls the motor 10 to stop driving while the trigger 9 is located in the off region.

[0040] More specifically, in the normal mode, the control unit 100 controls the rotation speed of the motor 10 in accordance with the amount of movement of the trigger switch 9A described above, which operates integrally with the trigger (operation unit) 9. This operation of the motor 10 is the same as in the conventional case, and therefore further detailed description will be omitted.

[0041] Next, with reference to FIG. 5, the operation in the normal mode and the on-lock mode and the transition between these modes will be described.

[0042] FIG. 5 is a diagram outlining the operation of the work machine of this embodiment in the normal mode and on-lock mode, and the state transition between these modes.

[0043] First, the normal mode will be described. In the following description, the "initial state" of the trigger 9 refers to a state in which the pulling amount of the trigger 9 (operating portion) is zero.

[0044] When the operator pulls the trigger 9 by an arbitrary amount from the initial state (see "Stop" in Figure 5) (see "Trigger Keep" in Figure 5 as appropriate), the control unit 100 transitions the mode of the work machine to (or maintains) the normal mode.

[0045] In this normal mode, the motor 10 is driven according to the amount of pulling of the trigger 9 under the control of the control unit 100. Generally, in the normal mode, the more the amount of pulling of the trigger 9, the more power is supplied to the motor 10, causing the motor 10 to rotate at a higher speed and increasing the airflow, and conversely, the less the amount of pulling of the trigger 9, the less power is supplied to the motor 10, causing the rotation speed of the motor 10 to decrease and decreasing the airflow.

[0046] Next, when the trigger 9 returns from this normal mode to its initial state (zero pulling amount), the control unit 100 controls the motor 10 to supply zero power, causing the motor 10 to stop. However, in reality, the motor 10 tries to continue rotating due to inertial force, so the motor 10 may not be stopped at the time of "stop" in Figure 5. For this reason, the "stop" state in Figure 5 may be referred to as "stop mode."

[0047] (Overview of On-Lock Mode) Next, the on-lock mode will be described. In this embodiment, when the operator quickly pulls (pushes) the trigger 9 twice in the stop mode (see "Stop" in FIG. 5 as appropriate), the control unit 100 controls the machine to transition from the stop mode to the on-lock mode (state transition).

[0048] Here, the on-lock mode is generally a mode in which the amount of power supplied to the motor 10 is fixed. In other words, the on-lock mode is a mode in which wind is blown out even when the trigger 9 returns to its initial state (zero pulling amount) due to, for example, the operator releasing the pressure on the trigger 9, because the amount of power supplied to the motor 10 is fixed.

[0049] In this embodiment, the on-lock mode is broadly divided into two states: (1) a "weak on-lock drive state" in which the amount of power supplied to the motor 10 is small, and (2) a "strong on-lock drive state" in which the amount of power supplied to the motor 10 is larger (than in (1)).

[0050] The on-lock mode is not limited to the above two modes, and may be configured to include, for example, (3) a "medium on-lock drive state" in which a medium amount of power is supplied to the motor 10, or the drive state may be further subdivided into multiple stages (such as (4), (5), etc.). However, since a detailed description of such a subdivided configuration would be cumbersome, we will omit the explanation to keep it as simple as possible. Below, the on-lock mode will be explained by focusing on two: (1) a weak on-lock drive state and (2) a strong on-lock drive state.

[0051] In this embodiment, when the trigger 9 is pulled (pushed) twice quickly, if the amount of pulling of the trigger 9 exceeds the threshold both times (see "forced pull" in FIG. 5 as appropriate), the system transitions to the strong on-lock drive state. In the strong on-lock drive state in the on-lock mode, the amount of power supplied to the motor 10 is greater than in (1) above, and therefore a stronger air (wind) is discharged (blown out) from the tip of the main nozzle 6.

[0052] On the other hand, when the trigger 9 is pulled (pushed) twice quickly, if the amount of pulling of the trigger 9 is equal to or less than the threshold value even once (see "weak pull" in FIG. 5 as appropriate), the system transitions to the weak on-lock drive state. In the weak on-lock drive state in the on-lock mode, the amount of power supplied to the motor 10 is less than in (2) above, and therefore a weaker wind is blown out.

[0053] As a modified example, the total value (in other words, the average value) of the two pull amounts of the trigger 9 may be used as a threshold value to switch between the weak on-lock drive state and the strong on-lock drive state.

[0054] Also, to express this operation metaphorically for ease of understanding, this operation can be said to be equivalent to double-clicking on a mouse, and therefore, hereinafter, this operation may be referred to as a "double-click" for convenience.

[0055] Next, the relationship between the pulling amount of the trigger 9 and the rotation speed of the motor 10 will be described with reference to Fig. 6. Fig. 6 is a time chart for comparatively explaining the relationship between the pulling amount of the trigger, the duty ratio, and the motor rotation speed.

[0056] 6 are timing charts showing, from top to bottom, the pull amount of the trigger 9 (hereinafter sometimes simply referred to as the pull amount), the duty ratio, and the motor rotation speed, with the horizontal axis representing time. Note that the range in which the pull amount of the trigger 9 is equal to or greater than 0 and less than the ON contact corresponds to the OFF region of the operation unit, and the range in which the pull amount of the trigger 9 is equal to or greater than the ON contact and less than the full pull amount corresponds to the ON region of the operation unit.

[0057] Referring to FIG. 6, in the initial state after the main power supply is turned on (time t0 at the left end of each graph), the pull amount, duty ratio, and motor rotation speed all indicate zero.

[0058] After this, when the trigger 9 is pulled from its initial position at time t1, the contact of the trigger switch 9A turns ON after the pulling distance (see time t2 and "contact ON" in the pulling distance graph), and at this timing the duty ratio rises to 6%. With this duty ratio of 6%, the motor rotation speed in this example rises to approximately 30,000 (rpm) (see the rotation speed graph at time t3).

[0059] After this, as the amount of pulling of the trigger 9 increases further, speed adjustment of the motor 10 begins (see the "initial speed adjustment" value in the figure), the duty ratio increases from 6%, and as this increase occurs, the rotation speed of the motor 10 increases further (see the values ​​in each graph for the period from time t3 to time t4 as appropriate). Here, as the duty ratio increases from 6% to 100%, the rotation speed of the motor 10 increases to its maximum speed (approximately 80,000 rpm in this example) (see the rotation speed graph at time t4).

[0060] In the normal mode, the duty ratio remains at 100% from the amount of pulling of the trigger 9 corresponding to the maximum speed control until it reaches the full pulling amount, and the rotation speed of the motor 10 also remains at the maximum speed (approximately 80,000 rpm).

[0061] Thereafter, when the pulling amount of the trigger 9 gradually decreases from the full pulling amount, the rotation speed of the motor 10 remains at the maximum speed (approximately 80,000 rpm) up to the pulling amount corresponding to the maximum speed control, as described above (see the values ​​of each graph at time t5 as appropriate).

[0062] Furthermore, if the pulling amount of the trigger 9 is further reduced from the pulling amount corresponding to the maximum speed regulation, the duty ratio and the rotation speed of the motor 10 also decrease as the pulling amount is reduced (see the values ​​in each graph for the period from time t5 to time t6 as appropriate).

[0063] [Transition to On-Lock Mode] Next, the states of the pulling amount, duty ratio, and motor rotation speed when transitioning to the on-lock mode will be described.

[0064] <Transition to Low Mode> As can be seen by looking at the center of each graph in Figure 6 (time t8 to time t11), when the trigger 9 is pulled (double-clicked) twice within a predetermined threshold time (200 milliseconds (ms) in this example), the duty ratio waveform also rises twice. Note that the operation of the motor 10 in response to these two rising edges of the duty ratio waveform is such that each rotation is slight, as shown in the "rotation speed" graph.

[0065] At this time, if any one of the two pulling operations of the trigger 9 does not exceed the threshold value TH shown in Figure 6 (in this example, the pulling amount is 95% of the maximum speed control), a transition process to weak mode is performed.

[0066] More specifically, when the second pulling of the trigger 9 is completed, i.e., when the contacts of the trigger switch 9A are turned OFF, the transition to the weak mode is initiated, and the motor 10 enters an on-lock state so as to be maintained at a low speed (approximately 30,000 rpm in this example) (see time t11 to time t12). In this on-lock state in the weak mode, the duty ratio is maintained at approximately 6%, as can be seen from the graph shown in the middle of Figure 6. The rotation speed of the motor 10 at low speed (approximately 30,000 rpm in this example) corresponds to the second rotation speed.

[0067] <Transition to Strong Mode> As can be seen by referring to times t12 to t15 in each graph shown in Figure 6, similar to the above, if the trigger 9 is pulled twice within a predetermined time (200 ms) and both of these pulling actions exceed the threshold value TH (pulling amount that is 95% of the maximum speed control), a transition process to strong mode is performed.

[0068] More specifically, as can be seen from the graph of "number of rotations" from time t12 to time t15, when the trigger 9 is pulled twice from the on-lock state (period B), the normal state is maintained from the first pull (time t12) to the second pull (time t15). Then, upon completion of the second pull of the trigger 9 (when the contacts of the trigger switch 9A turn OFF), the transition to the strong mode is initiated, and the motor 10 enters the on-lock state so that it is maintained at high speed (approximately 80,000 rpm in this example) (see times t15 to t16). In this on-lock state in the strong mode, the duty ratio is maintained at approximately 100%, as can be seen from the graph in the middle of FIG. 6 . The rotation speed of the motor 10 at high speed (approximately 80,000 rpm in this example) corresponds to the first rotation speed.

[0069] 6, as shown at time t16, when the trigger 9 is pulled so that the contacts of the trigger switch 9A are turned ON during the on-lock state described above, the normal mode is restored (see period E). In this example, at time t17, the trigger 9 returns to the initial state (the duty ratio and rotation speed are 6% and 30,000 rpm, respectively), and the motor 10 stops at time t18.

[0070] As described above in detail, the working machine (blower 1) of this embodiment includes a motor 10, an operating unit 9 that can be moved from an initial position by an operator's operation, and a control unit 100 that controls the driving of the motor 10 depending on the operating state of the operating unit 9 and can detect the position of the operating unit 9. The control unit 100 controls switching between multiple operating modes, including a normal mode and an on-lock mode. Specifically, in the normal mode, the control unit 100 drives the motor 10 while the operating unit 9 is located in the on area, and stops the driving of the motor 10 while the operating unit 9 is located in the off area. In addition, in the on-lock mode, the control unit 100 drives the motor 10 regardless of the position of the operating unit 9. Furthermore, when a switching operation is performed in the normal mode, including the operating unit 9 being located in the on area multiple times, the control unit 100 switches to the on-lock mode. In the on-lock mode, the control unit 100 controls the operation of the motor 10 so that the rotation speed of the motor 10 is fixed depending on the amount of movement of the operating unit 9 from the initial position during the switching operation.

[0071] According to the work machine of this embodiment having such a configuration, workability can be improved.

[0072] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention.

[0073] <Modifications> In the above-described embodiment, the case has been described where the pull amount threshold (first threshold) TH is 95% of the maximum speed control of the trigger (operating unit) 9. The value of the threshold TH is not limited to this, and can be set to any value within the range of 60% to 100% of the maximum speed control.

[0074] In the above embodiment, the time threshold is 200 ms, but the time threshold is not limited to this and can be set to any value in the range of 60 ms to 2000 ms.

[0075] 1...blower (work machine), 2...housing section, 3...motor case (first housing section), 4...handle section, 5...battery mounting section (second housing section), 6...main nozzle (nozzle section), 6a...tip side section (one end section, first housing section side end), 6b...base side section (other end section, second housing section side end), 6c...outer periphery, 6d...intake port, 6e...exhaust port, 6f...protrusion, 7...battery pack, 8...control board, 9...trigger (operation section), 9A...trigger switch, 10...motor, 10a...fan, 10b...stator, 10c...rotor, 10d...inner wall, 10e...motor board, 11...intake section, 11a...mesh section, 12...exhaust section, 12a...groove section, 13...upper holding section (first holding section holding section), 13a...second 1 groove portion, 13b...second groove portion, 14...lower holding portion (second holding portion holding portion), 14a...protrusion portion, 15...protruding portion, 16...sub-nozzle (nozzle portion), 17...LED, 18...accommodation space, 19...operation space, 30...motor output portion, 31...motor control base, 80...board unit, 81...rotation speed detection circuit, 82...control signal output circuit, 83...current detection circuit, 84...power switch circuit, 85...power supply circuit, 86...trigger switch detection circuit, 87...trigger switch operation amount detection portion, 88, 89...connector, 100...control portion, C1...axial direction, D1, D2...diameter, E1...extension direction, F1...air flow, G1, G2...diameter, L1...length of handle portion, L2...length of handle portion + trigger, L3, L4, L5...distance

Claims

1. A motor, an operating part that can be moved from an initial position by an operator's operation, and a control part that controls the driving of the motor according to the operating state of the operating part and can detect the position of the operating part. The control part can be switched to a plurality of operation modes including a normal mode and an on-lock mode. The control part drives the motor as the normal mode only while the operating part is located in the on-region. In the on-lock mode, the motor is driven regardless of the position of the operating part. When a switching operation including the operating part being located in the on-region a plurality of times is performed, the control part switches the operation mode to the on-lock mode. In the on-lock mode, the rotation speed of the motor is set according to the amount of movement of the operating part from the initial position in the switching operation. A working machine.

2. The switching operation is that a reciprocating operation in which the operating part moves from the on-region to the off-region and then passes through the on-region again and moves to the off-region again is performed. The working machine according to Claim 1.

3. In the on-lock mode, the control part controls the driving of the motor at a first rotation speed and a second rotation speed lower than the first rotation speed. When the maximum value of the amount of movement of the operating part from the initial position exceeds a first threshold value in all cases where the operating part is located in the on-region a plurality of times in the switching operation, the control part drives the motor at the first rotation speed. The working machine according to Claim 1.

4. In the on-lock mode, when the operating part moves from the off-region to the on-region, the control part controls the driving of the motor so as to switch to the normal mode. The working machine according to Claim 1.

5. The plurality of times is two times. The working machine according to Claim 1.

6. The first threshold value is set in the range of 60% to 100% of the maximum speed regulation of the operating part. The working machine according to Claim 3.

7. In the two reciprocating operations, when the time of each reciprocating operation is in the range of 60 ms to 300 ms, the control part performs a process of shifting to the on-lock mode. The working machine according to Claim 5.

8. A fan driven by the driving force of the motor, a housing that houses the motor and the fan and has an intake port that serves as an inlet for the air flow by the fan and an exhaust port that serves as an outlet. A nozzle detachably attached to the exhaust port. The working machine according to claim 1.

9. A motor, An operation unit operated by an operator, A control unit that controls the driving of the motor according to the operation state of the operation unit, The control unit, When the operation unit is operated without a switching operation being performed on the operation unit, the motor is driven only while the operation unit is in the on region. When the switching operation is performed on the operation unit, the motor is driven regardless of the position of the operation unit. The control unit sets the rotation speed of the motor after the switching operation is performed on the operation unit according to the switching operation. Working machine.