Scrubbing

Abstract

A scrubber comprises a drive assembly including a motor rotating about a motor axis extending in an up-down direction, a tool facing a cleaning target and rotated by the motor, a guard area including at least a part arranged around the tool, and an attachment / removal mechanism including a hook component that attaches and detaches the drive assembly and guard area.

Description

TECHNICAL AREA

[0001] The techniques disclosed in the present invention relate to a scrub brush. STATE OF THE ART

[0002] A soil cultivation machine, as disclosed in US 5 432 970 B2, is known in the technical field with respect to a scrubber.

[0003] When a scrubber cleans a target, cleaning fluid is sprayed onto it. A protective shield is attached to the scrubber to prevent splashing. Maintenance of this shield requires its removal from the scrubber. Furthermore, some targets are preferably cleaned with the shield removed. Therefore, a technique for easily attaching and removing the shield is needed.

[0004] One non-restrictive task of the present teachings is the attachment and removal of a protective area of ​​a scrub brush. BRIEF SUMMARY

[0005] The above-mentioned problem is solved by a scrubber according to claim 1.

[0006] In one aspect of the present teachings, a scrubber comprises a drive assembly comprising a motor rotating about a motor axis extending in an up-down direction, a tool facing (directed / oriented towards) a cleaning target and rotated by the motor, a protective area (shielding area, shielding part, protective part, protective shield) having at least a part arranged around the tool, and an attachment / removal mechanism comprising a hook component that attaches and removes the drive assembly and the protective area.

[0007] According to the techniques revealed in the present teachings, a protective area of ​​a scrubber can be attached and removed. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a scrubber according to a first embodiment, viewed from the top right front; Fig. 2 shows the scrubber as seen from above according to the first embodiment; Fig. 3 shows the scrubber as seen from below according to the first embodiment; Fig. 4 shows the scrubber as seen from the right according to the first embodiment; Fig. 5 shows the scrubber as seen from the left according to the first embodiment; Fig. 6 shows the scrubber as seen from the front according to the first embodiment; Fig. 7 shows the scrubber according to the first embodiment as seen from the back; Fig. Figure 8 is a cross-sectional view showing the scrubber according to the first embodiment; Fig. 9 represents a main body assembly according to the first embodiment, viewed from above; Fig. 10 represents the main body assembly as seen from the right in the first embodiment; Fig. 11 represents the actuation of a battery cover according to the first embodiment; Fig. 12 represents a battery pack detached from a battery mounting area according to the first embodiment; Fig. 13 presents an example of a method for temporarily storing the scrubber according to the first embodiment; Fig. Figure 14 presents an example of the method for temporarily storing the scrubber according to the first embodiment; Fig. 15 presents an example of the method for temporarily storing the scrubber according to the first embodiment; Fig. 16 represents the front area of ​​the scrubber according to the first embodiment, viewed from the top right front; Fig. Figure 17 is a cross-sectional view showing the front area of ​​the scrubber according to the first embodiment; Fig. Figure 18 is a cross-sectional view showing the front area of ​​the scrubber according to the first embodiment; Fig. Figure 19 is an exploded view showing the front area of ​​the scrubber as seen from the top right front according to the first embodiment; Fig. 20 represents a drive assembly according to the first embodiment, viewed from the top right front; Fig. 21 shows the drive assembly according to the first embodiment as seen from the top left rear; Fig. 22 shows the drive assembly according to the first embodiment as seen from the bottom right front; Fig. 23 is an exploded view showing the drive assembly as seen from the top right front according to the first embodiment; Fig. 24 represents an adapter and a cover according to the first embodiment, viewed from the right; Fig. Figure 25 is a cross-sectional view showing the adapter and cover according to the first embodiment; Fig. 26 represents a tool according to the first embodiment, viewed from the top right front; Fig. 27 is an exploded view showing the tool as seen from the top right front according to the first embodiment; Fig. Figure 28 is a cross-sectional view showing the tool according to the first embodiment; Fig. 29 shows the tool connected to the drive assembly according to the first embodiment, as seen from the top right front; Fig. 30 represents the tool connected to the drive assembly according to the first embodiment, as seen from below; Fig. 31 shows the drive assembly and the protective area as seen from the top right front according to the first embodiment; Fig. 32 represents the protected area as seen from the top right front according to the first embodiment; Fig. 33 represents the protected area as seen from the right according to the first embodiment; Fig. 34 represents the protected area as seen from the front according to the first embodiment; Fig. Figure 35 is a cross-sectional view showing the protected area according to the first embodiment; Fig. 36 is an exploded view showing the protected area as seen from the top right front according to the first embodiment; Fig. Figure 37 represents an attachment / removal mechanism according to the first embodiment, viewed from the top left front; Fig. Figure 38 shows the attachment / removal mechanism according to the first embodiment, viewed from the top right rear; Fig. Figure 39 shows the attachment / removal mechanism according to the first embodiment as seen from above; Fig. Figure 40 is a cross-sectional view showing the attachment / removal mechanism according to the first embodiment; Fig. Figure 41 is an exploded view showing the attachment / removal mechanism according to the first embodiment as seen from the top left front; Fig. Figure 42 is an exploded view showing the attachment / removal mechanism according to the first embodiment as seen from the top right rear; Fig. 43 represents a second hook component according to the first embodiment, viewed from above; Fig. Figure 44 shows the attachment / removal mechanism according to the first embodiment, viewed from the top left front; Fig. Figure 45 shows the attachment / removal mechanism according to the first embodiment, viewed from the top right rear; Fig. Figure 46 shows the attachment / removal mechanism according to the first embodiment as seen from above; Fig. Figure 47 is a cross-sectional view showing the attachment / removal mechanism according to the first embodiment; Fig. 48 is an exploded view showing an adjustment mechanism according to the first embodiment as seen from the top right front; Fig. 49 represents the front area of ​​the scrubber according to the first embodiment, viewed from the top right front; Fig. 50 represents the protective area, which has its heights adjusted by the adjustment mechanism, according to the first embodiment; Fig. Figure 51 represents an attachment / removal mechanism according to a second embodiment, viewed from the top left front; Fig. Figure 52 shows the attachment / removal mechanism according to the second embodiment, viewed from the top right rear; Fig. Figure 53 shows the attachment / removal mechanism according to the second embodiment as seen from above; Fig. Figure 54 shows the attachment / removal mechanism in an engaged state and a released state according to the second embodiment, viewed from above; Fig. Figure 55 shows the attachment / removal mechanism in the engaged state and in the released state according to the second embodiment, viewed from the right; Fig. Figure 56 shows an attachment / removal mechanism according to a third embodiment, viewed from the top left front; Fig. Figure 57 shows the attachment / removal mechanism according to the third embodiment, viewed from the top right rear; Fig. Figure 58 shows the attachment / removal mechanism according to the third embodiment as seen from above; Fig. Figure 59 shows the attachment / removal mechanism in an engaged state and a released state according to the third embodiment, viewed from above; Fig. Figure 60 shows the attachment / removal mechanism in the engaged state and in the released state according to the third embodiment, viewed from the right; Fig. 61 represents an adjustment mechanism according to a fourth embodiment, viewed from the top right front; Fig. 62 is an exploded view showing the adjustment mechanism according to the fourth embodiment as seen from the top right front; Fig. 63 is an exploded view showing the adjustment mechanism according to the fourth embodiment as seen from the top right front; Fig. 64 shows the adjustment mechanism according to the fourth embodiment, viewed from the top right front; Fig. 65 represents a protective area which has a height set by the adjustment mechanism, according to the fourth embodiment; Fig. 66 represents an adjustment mechanism according to a fifth embodiment, viewed from the top right front; Fig. 67 is an exploded view showing the adjustment mechanism according to the fifth embodiment as seen from the top right front; Fig. 68 is an exploded view showing the adjustment mechanism according to the fifth embodiment as seen from the top right front; and Fig. 69 represents a protective area having a height that is set by the adjustment mechanism, according to the fifth embodiment. DETAILED DESCRIPTION OF PREFERRED EXECUTION FORMS

[0008] In one or more embodiments, a scrubber may have a drive assembly comprising a motor rotating about a motor axis extending in the top-bottom direction, a tool directed towards a cleaning target and rotated by the motor, a protective area (shield, screen part) arranged at least partially around the tool, and an attachment / removal mechanism comprising a hook component configured to attach and detach (remove) the drive assembly and the protective area from each other.

[0009] In the configuration described above, the scrubber's protective area can be smoothly attached and removed by the attachment / removal mechanism which features the hook component.

[0010] In one or more embodiments, the attachment / removal mechanism can be provided on one or both of the drive assembly and the protective area.

[0011] In the configuration described above, the attachment / removal mechanism is provided on one or both of the drive assembly and the protective area, thus preventing an increase in the size of the scrubber.

[0012] In one or more embodiments, the hook component can be movably mounted by the drive assembly.

[0013] In the configuration described above, the scrubber's protective area can be smoothly attached and removed by the hook component, which is movably mounted by the drive assembly.

[0014] In one or more embodiments, the hook component can have a first hook component and a second hook component, which is connected to at least a part of the first hook component and which moves synchronously with the first hook component.

[0015] In the configuration described above, when the first hook component is activated, the second hook component moves synchronously with the first hook component, so that the scrubber's protective area can be attached and removed with good ease of use.

[0016] In one or more embodiments, the first hook component can have a main body area arranged around a rotating shaft connecting the motor to the tool, and a first hook area located below the front area of ​​the main body area and hooked onto the guard area.

[0017] In the configuration described above, the main body area is arranged around the rotating shaft, thus preventing any increase in size during the attachment / removal mechanism. The scrubber's protective area can be smoothly attached and removed using the first hook component.

[0018] In one or more embodiments, the first hook component may have an actuating button area which is provided on the front area of ​​the main body area and which projects forward from a head housing of the drive assembly.

[0019] In the configuration described above, the scrubber's protective area can be easily attached and removed by simply operating the operating button area.

[0020] In one or more embodiments, the first hook component can have a connecting hole which is provided at the rear area of ​​the main body area, and into which at least a part of the second hook component is inserted.

[0021] In the configuration described above, the first hook component and the second hook component are connected via the connecting holes.

[0022] In one or more embodiments, the second hook component can have the insertion area that is inserted into the connecting hole and the second hook area that is arranged below the insertion area and is hooked onto the protective area.

[0023] In the configuration described above, the first and second hook components are connected via the connecting hole and the insertion section that is inserted into the connecting hole. The scrubber's protective cover can be smoothly attached and removed using the second hook component.

[0024] In one or more embodiments, the second hook component can have a pivoting area that is arranged between the insertion area and the second hook area in the top-bottom direction.

[0025] In the configuration described above, when the first hook component moves in the front-back direction, the second hook component pivots so that the second hook area can be moved.

[0026] In one or more embodiments, when viewed from above, an extension line of the pivot axis of the pivot area can pass the upper surface of the second hook area.

[0027] In the configuration described above, the force used to release the protective area from the drive assembly prevents the second hook component from rotating.

[0028] In one or more embodiments, the drive assembly can include the hook cover, which is inserted into an opening provided in the protective area. The hook cover can support the first hook component and the second hook component.

[0029] In the configuration described above, the hook cover, which is inserted into the opening of the protective area, holds the first hook component and the second hook component, allowing the scrubber's protective area to be attached and removed smoothly.

[0030] In one or more embodiments, the hook cover can have a cylindrical area that is inserted into the opening and a sliding area that is provided on the outer surface of the cylindrical area and is guided through the guide area that is provided on the protective area.

[0031] In the configuration described above, the hook cover is guided through the guide area, allowing the hook cover to be inserted smoothly into the opening.

[0032] In one or more embodiments, the cylindrical area can have a first hook hole in which a first hook section of the first hook component is movably arranged in the first hook hole and second hook holes in which a second hook section of the second hook component is movably arranged.

[0033] In the configuration described above, the first hook section can move between an engagement position and a release position in a state where it is held in place by the hook cover. The second hook section can also move between the engagement position and the release position in a state where it is held in place by the hook cover.

[0034] In one or more embodiments, the attachment / removal mechanism may include a pre-tensioning component that pre-tensions the hook component in such a way that the hook component approaches the protected area.

[0035] In the configuration described above, the hook component and the protective area are stably engaged with each other.

[0036] In one or more embodiments, the hook component can comprise a first hook component and a second hook component, the latter being connected to at least a portion of the first hook component and moving synchronously with the first hook component. The pretensioning component can be arranged between the first hook component and at least a portion of the hook cover, which supports the first hook component in such a way that it is movable. The pretensioning component can pretension the first hook component such that the first hook component approaches the protected area. The pretensioning component can pretension the second hook component via the first hook component such that the second hook component approaches the protected area.

[0037] In the configuration described above, the hook component and the protective area are securely engaged with each other. Furthermore, the second hook component moves synchronously with the first when the first hook component is actuated, allowing the scrubber's protective area to be attached and removed with ease.

[0038] In one or more embodiments, the drive assembly includes the hook cover, which is inserted into the opening provided in the protective area. The hook cover can support the hook component in such a way that it is movable. When the pretensioning component pretensions the first hook component and the second hook component with the hook cover inserted into the opening, an engagement state is created in which the first hook sections of the first hook component and the second hook sections of the second hook component are hooked into the protective area. When the actuating button section provided on the first hook component is actuated against the pretensioning force of the pretensioning component, a release state is created in which the first hook section and the second hook section are separated from the protective area.

[0039] With the configuration described above, the scrubber user can attach and remove the protective area with a single movement.

[0040] Although embodiments according to the present disclosure are described below with reference to the drawings, the present disclosure is not limited to these embodiments. Components of the embodiments described below can be suitably combined. Furthermore, some components are not used in some cases.

[0041] In the embodiments, the positional relationship between areas is described using the terms "left", "right", "front", "back", "top", and "bottom". These terms indicate the relative position or direction with respect to the center of a scrubber 1. First embodiment

[0042] A first embodiment is described. Scrubber overview

[0043] Fig. Figure 1 shows the scrubber 1 as seen from the top right front according to the first embodiment. Fig. Figure 2 shows the scrubber 1 as seen from above, according to the first embodiment. Fig. Figure 3 shows the scrubber 1 as seen from below according to the first embodiment. Fig. Figure 4 shows the scrubber 1 as seen from the right according to the first embodiment. Fig. Figure 5 shows the scrubber 1 as seen from the left according to the first embodiment. Fig. Figure 6 shows the scrubber 1 as seen from the front according to the first embodiment. Fig. Figure 7 shows the scrubber 1 as seen from behind, according to the first embodiment. Fig. Figure 8 is a cross-sectional view showing the scrubber 1 according to the first embodiment.

[0044] The scrubber 1 is used to clean a cleaning target. Examples of cleaning targets include floors. The scrubber 1 is an example of a floor cleaning machine. The scrubber 1 is a so-called floor polisher (polishing machine).

[0045] The scrubber 1 has a drive assembly 2, a tool 3, a protective area (shield, shielding part) 4, a main body assembly 5, a rod 6, a rod receiving area 7, a front handle 8, lights 9, a swivel area 10, an attachment / removal mechanism 11 and an adjustment mechanism 12.

[0046] The drive assembly 2 comprises a head housing 13, a motor 14, and a power transmission mechanism 15. The motor 14 is an internal rotor brushless DC motor. The motor 14 rotates about (has) a motor axis of rotation AX, which extends in the up-down direction. The power transmission mechanism 15 transmits a torque generated by the motor 14 to the tool 3.

[0047] Tool 3 is a rotating cleaning element that cleans the cleaning target. Tool 3 is positioned opposite (directed towards) the cleaning target and is rotated by motor 14. Tool 3 rotates while in contact with the cleaning target, thus scrubbing or polishing it. In this embodiment, tool 3 has a brush 48 (e.g., see figure). Fig. 26). It is noted that tool 3 may have a polishing pad.

[0048] The protective zone 4 is attached to the drive assembly 2. The protective zone 4 can be attached to or removed from the drive assembly 2. At least part of the protective zone 4 is arranged around the tool 3. When the scrubber 1 cleans the cleaning target, a cleaning fluid can be sprayed onto the cleaning target. When the cleaning fluid is sprayed onto the cleaning target, the protective zone 4 is arranged around the tool 3 to prevent splashing of the cleaning fluid.

[0049] The rod 6 is elongated in the front-back direction. The rod 6 connects the rod receiving area 7 with the pivoting area 10. The rod receiving area 7 is fixed to the front area of ​​the main body housing 16. The rod receiving area 7 has a cylindrical shape. As shown in Fig. As shown in Figure 1, a sleeve 90 is arranged around the rod 6. The rear portion of the sleeve 90 is located inside the rod receiving area 7. The front portion of the sleeve 90 is located on the front side of the rod receiving area 7. The sleeve 90 is fixed to the rod receiving area 7. At least a portion of the rod 6 is located inside the rod receiving area 7 and inside the sleeve 90. The rod 6 and the rod receiving area 7 have a telescopic structure. The rod 6 can move in the front-back direction with respect to the rod receiving area 7 and the sleeve 90. A fastening mechanism for securing the rod 6 is provided on the front portion of the sleeve 90. A locking lever 23 is located on the front portion of the sleeve 90. When the locking lever 23 is actuated, the fastening mechanism of the sleeve 90 is actuated, the rod 6 is fastened, and the position of the rod 6 is fixed in relation to the rod receiving area 7.When the locking lever 23 is released, the rod 6 can move relative to the rod receiving area 7. As the rod 6 moves, its position relative to the rod receiving area 7 is adjusted. Once the position of the rod 6 is adjusted relative to the rod receiving area 7, the length of the rod 6 between the rod receiving area 7 and the pivot area 10 is adjusted. When the rod 6 moves inside the rod receiving area 7 so that a spring pin (not shown) provided in the rod 6 comes into contact with the rear end of the sleeve 90, the rod 6 is adjusted to have its longest length between the rod receiving area 7 and the pivot area 10.When the rod 6 moves in such a way that the front end of the sleeve 90 comes into contact with the rear end of the swivel range 10, the rod 6 is adjusted so that it has the shortest length between the rod receiving area 7 and the swivel range 10.

[0050] A user of the scrubber 1 grasps the front handle 8. The front handle 8 is fixed to the rod holder 7. The front handle 8 is essentially ring-shaped. The front handle 8 projects upwards from the rod holder 7.

[0051] The front handle 8 has a locking mechanism 24. The locking mechanism 24 secures the front handle 8 to the rod receptacle 7. The locking mechanism 24 has a fastening mechanism arranged around the rod receptacle 7. When a rotary knob 24A of the locking mechanism 24 is turned in one direction, the fastening mechanism is activated to secure the rod receptacle 7. When the fastening mechanism secures the rod receptacle 7, the front handle 8 is fixed to the rod receptacle 7. When the rotary knob 24A is turned in the other direction, the fastening mechanism releases the rod receptacle 7, and the locking mechanism 24 is released from the rod receptacle 7.When the fixing mechanism 24 is released, the front handle 8 can rotate around the rod receiving area 7, can move in the front-back direction with respect to the rod receiving area 7 and can tilt in the front-back direction.

[0052] The swivel mount 10 supports the drive assembly 2 such that it is pivotable. The swivel mount 10 has a base 10A and a pair of bearing areas 10B. The base 10A is attached to the rod 6. The pair of bearing areas 10B are arranged on the left and right sides of the drive assembly 2, respectively. The swivel mount 10 supports the drive assembly 2 such that it is pivotable about a first assembly swivel axis NX, which extends in the front-back direction. The swivel mount 10 also supports the drive assembly 2 such that it is pivotable about a second assembly swivel axis BX, which extends in the left-right direction. The swivel mount 10 can pivot about the second assembly swivel axis BX between a first swivel position and a second swivel position. In the first swivel position, a longitudinal axis (not shown) of the rod 6 is perpendicular to the motor rotation axis AX.The swivel range 10 pivots forward by 90 degrees from the first swivel position to reach the second swivel position. The swivel range 10 can pivot about the first assembly swivel axis NX between a third swivel position and a fourth swivel position. The swivel range 10 pivots 30 degrees to the left from the position where the second assembly swivel axis BX is perpendicular to the motor rotation axis AX to reach the third swivel position, and pivots 30 degrees to the right to reach the fourth swivel position. A locking mechanism 25, which restricts the swiveling of the drive assembly 2, is provided between the drive assembly 2 and the swivel range 10. A lever 25A of the locking mechanism 25 is actuated to switch the drive assembly between swiveling about the first assembly swivel axis NX and locking it in place.A lever 25B of the fixing mechanism 25 is actuated to switch the drive assembly 2 between pivoting about the second assembly pivot axis BX and fixing.

[0053] The lights 9 illuminate the cleaning target. Two lights 9 are provided on the swivel area 10. One light 9 is located on the left storage area 10B. The other light 9 is located on the right storage area 10B. The lights 9 emit illumination towards the front of the scrubber 1.

[0054] The mounting / removal mechanism 11 attaches the drive assembly 2 and the guard area 4 to each other and detaches (removes) them from each other. The adjustment mechanism 12 adjusts the height of the guard area 4 relative to the drive assembly 2. The mounting / removal mechanism 11 and the adjustment mechanism 12 are described later. Main body assembly

[0055] Fig. Figure 9 shows the main body assembly 5 as seen from above according to the first embodiment. Fig. 10 represents the main body assembly 5 as seen from the right according to the first embodiment. Fig. 10 shows a virtual line indicating battery cover 22.

[0056] The main body assembly 5 comprises the main body housing 16, a push-button lever 17, an interface panel 18, a control unit 19, and a battery mounting area 20. A battery 21 is mounted on the battery mounting area 20. The battery cover 22 is attached to the lower part of the main body housing 16.

[0057] The main body housing 16 accommodates at least the control unit 19. The main body housing 16 has a body section 16A, a handle section 16B, a control unit receptacle 16C, a battery holder 16D, and a rubber section 16E. The body section 16A is cylindrical and elongated in the front-to-back direction. The handle section 16B extends rearward from the rear section of the body section 16A. The handle section 16B is essentially ring-shaped. The user of the scrubber 1 grasps the handle section 16B. The control unit receptacle 16C accommodates the control unit 19. The control unit receptacle 16C is connected to the lower section of the rear section of the body section 16A. The control unit receptacle 16C is connected to the front section of the lower section of the handle section 16B. The battery holder 16D holds the battery pack 21 above the battery mounting area 20.The battery mounting area 20 is located on the battery holder 16D. The battery holder 16D is located on the lower part of the body area 16A. The rubber area 16E is located on the lower part of the rear part of the handle area 16B.

[0058] The trigger lever 17 is located on the handle area 16B. The user operates the trigger lever 17 to activate the motor 14. The controller 19 controls the motor 14 based on an actuation signal generated by actuating the trigger lever 17. The controller 19 drives or stops the motor 14 based on the actuation signal from the trigger lever 17. The trigger lever 17 is actuated to switch the motor between driving and stopping. The trigger lever 17 is positioned so that it faces the interior of the annular handle area 16B. The trigger lever 17 projects downwards from the upper part of the handle area 16B.

[0059] The user operates the interface panel 18. The interface panel 18 is located on the upper surface of body area 16A. The interface panel 18 is operated to change the settings of the motor 14. The interface panel 18 is operated to change the speed of the motor 14. The interface panel 18 is operated to change the direction of rotation of the motor 14. The controller 19 changes the settings of the motor 14 based on an actuation signal generated by actuating the interface panel 18.

[0060] As in Fig. As shown in Figure 9, the interface panel 18 has a speed change knob 18A and a reverse knob 18B. When the speed change knob 18A is pressed and held while the main power source of the scrubber 1 is off, the main power source of the scrubber 1 is switched to an on state. When the speed change knob 18A is pressed and held while the main power source of the scrubber 1 is on, the main power source of the scrubber 1 is switched to an off state. Each time the speed change knob 18A is pressed briefly, the speed of the motor 14 is changed. A single short press of the speed change knob 18A sets the speed of the motor 14 to a first speed. A second short press of the speed change knob 18A sets the speed of the motor 14 to a second speed, which is higher than the first speed.If the speed change knob 18A is pressed briefly again, the speed of motor 14 is set to a third speed, which is higher than the second speed. If the speed change knob 18A is pressed briefly once more, the speed of motor 14 is set to the first speed. If the trigger lever 17 is actuated when the speed of motor 14 is set by actuating the speed change knob 18A, the motor 14 rotates at the set speed. If the speed change knob 18A is pressed briefly when the trigger lever 17 is actuated, the speed of motor 14 is changed while the motor 14 is being driven.

[0061] When the speed change knob 18A is pressed and the push-button lever 17 is then actuated, the motor 14 rotates forward. When the reverse knob 18B is pressed and the push-button lever 17 is then actuated, the motor 14 rotates only for a specific time and then stops. This specific time is, for example, 0.1 seconds or greater and 1 second or less.

[0062] The controller 19 controls at least the motor 14. The controller 19 comprises a circuit board and a number of electronic components mounted on the circuit board. Examples of the electronic components include a microcomputer and a switching element. The controller 19 is located in the control unit mounting area 16C.

[0063] The battery mounting area 20 is located on the lower part of the battery holder 16D. The battery mounting area 20 is located in front of the handle area 16B and behind the front handle 8. The battery mounting area 20 is located in front of the push-button lever 17.

[0064] The battery mounting area 20 is connected to the battery pack 21. The battery pack 21 is mounted on the battery mounting area 20. The battery pack 21 can be attached to and removed from the battery mounting area 20. In this embodiment, a battery mounting area 20 is provided. A battery pack 21 is mounted on the battery mounting area 20.

[0065] Battery pack 21 supplies power to motor 14. Battery pack 21 is a general-purpose battery that can be used as a power source for various electrical devices. Battery pack 21 can be used as a power source for a power tool. Battery pack 21 can be used as a power source for an electrical device other than the power tool. Battery pack 21 contains a lithium-ion battery. Battery pack 21 is a rechargeable battery. Battery pack 21 can be a battery pack for a power tool.

[0066] The nominal voltage of battery pack 21 is not specifically limited. The nominal voltage of battery pack 21 can be 18 V, 36 V, or 72 V. The nominal voltage of battery pack 21 can be less than 18 V, e.g., 10.8 V or 18.4 V.

[0067] The battery cover 22 covers the battery pack 21, which is mounted on the battery mounting area 20. The battery cover 22 protects the battery pack 21, which is mounted on the battery mounting area 20. When a cleaning fluid is sprayed onto the cleaning target, the battery cover 22 prevents the cleaning fluid from adhering to the battery pack 21. The battery cover 22 is made of a material that is resistant to the cleaning fluid and has a low specific gravity. In this embodiment, the battery cover 22 is, for example, made of a polypropylene resin.

[0068] When the battery pack 21 is mounted on the battery mounting area 20, a bottom surface 21A of the battery pack 21 is substantially parallel to a bottom surface 22A of the battery cover 22, and a rear surface 21B of the battery pack 21 is substantially parallel to a rear surface 22B of the battery cover 22.

[0069] Each of the bottom surface 22A and the rear surface 22B is essentially flat. The bottom surface 22A is essentially perpendicular to the rear surface 22B.

[0070] Fig. 11 represents the operation of the battery cover 22. Fig. 12 represents the battery pack 21, which is removed (detached) from the battery mounting area 20 according to the first embodiment.

[0071] The front section of the battery cover 22 is pivotally mounted to the lower section of the main body housing 16 via a hinge mechanism 22c. The rear section of the battery cover 22 is removable (detachable) and attached to the lower section of the main body housing 16 via a locking mechanism 22D.

[0072] As in Fig. As shown in Figure 11, when a locking lever 22E is actuated, the battery cover 22 is released from its fixation to the main body housing 16 by the locking mechanism 22D. With the battery cover 22 released, it can pivot around the hinge mechanism 22C. As the battery cover 22 pivots, the battery pack 21 is revealed. As shown in Figure 11, the battery cover 22 is then removed. Fig. As shown in Figure 12, the battery pack 21 is detached from the battery mounting area 20 when it is moved away from the battery mounting area 20 towards the lower rear side. The battery pack 21 is attached to the battery mounting area 20 by inserting it into the battery mounting area 20 from the lower rear side of the battery mounting area 20.

[0073] When mounted on battery mounting area 20, the battery pack 21 can supply power to the motor 14. The power from the battery pack 21 is supplied to the motor 14 via a cable. As shown in Fig. As shown in Figure 1, a tube 26, which houses a cable, is arranged between the swivel area 10 and the drive assembly 2. The tube 26 is flexible. The tube 26 protects the cable. The motor 14 is driven based on the power supplied by the battery pack 21. Method for temporarily storing the scrub brush

[0074] Fig. Figure 13 presents an example of a method for temporarily storing the scrubber according to the first embodiment. The battery cover 22 is connected to the battery holder 16D in the lower part of the body section 16A. Here, the battery cover 22 is located in front of the handle section 16B and behind the front handle 8. The battery cover 22 is located in front of the trigger lever 17. Each of the bottom surface 22A and the rear surface 22B is substantially flat. The bottom surface 22A is substantially perpendicular to the rear surface 22B. As shown in Fig. As shown in Figure 13, the user of the scrubber 1 can use the battery cover 22 to place (put down) the scrubber 1 on the upper surface of a structure (e.g., the upper surface of a table).

[0075] Fig. Figure 14 presents an example of a method for temporarily storing the scrubber 1 according to the first embodiment. As in Fig. As shown in Figure 14, the rubber section 16E is located at the rear of the handle section 16B. The rubber section 16E has a rubber plate attached to the rear of the handle section 16B. The user can lean the scrubber 1 against the wall of a structure so that the rubber section 16E is in contact with the wall of the structure. The rubber section 16E prevents damage to the structure.

[0076] Fig. Figure 15 illustrates the method for temporarily parking the scrubber 1 according to the first embodiment. While a cleaning target is being cleaned using the scrubber 1, the user can move around with a building maintenance cart 27. As shown in Fig. As shown in Figure 15, the user can hook the front handle 8 onto a building maintenance cart 27. The front handle 8 projects from the pole receptacle 7. The user can adjust the angle formed by the front handle 8 and the pole receptacle 7 when the locking mechanism 24 is released. Therefore, the front handle 8 is easily hooked onto at least part of the building maintenance cart 27. drive assembly

[0077] Fig. Figure 16 represents the front area of ​​the scrubber 1 according to the first embodiment, viewed from the top right front. Fig. 17 and Fig. Figure 18 are cross-sectional views showing the front area of ​​the scrubber 1 according to the first embodiment. Fig. Figure 17 is a cross-sectional view along line AA in Fig. 16. Fig. Figure 18 is a cross-sectional view along line BB in Fig. 16. Fig. Figure 19 is an exploded view showing the front area of ​​the scrubber 1 according to the first embodiment, as seen from the top right front. Fig. Figure 20 shows the drive assembly 2 as seen from the top right front according to the first embodiment. Fig. Figure 21 shows the drive assembly 2 as seen from the top left rear according to the first embodiment. Fig. Figure 22 shows the drive assembly 2 as seen from the bottom right front according to the first embodiment. Fig. Figure 23 is an exploded view showing the drive assembly 2 as seen from the top right front according to the first embodiment.

[0078] The drive assembly 2 comprises the motor 14, the power transmission mechanism 15, a motor housing 28 that accommodates the motor 14, a gearbox housing 29 that accommodates the power transmission mechanism 15, the head housing 13 that accommodates the motor housing 28 and the gearbox housing 29, a hook component 30, a hook cover 33 and an adapter 34.

[0079] The head housing 13 has a so-called semi-split structure. The head housing 13 comprises a pair of housing halves. The head housing 13 has a left housing 13L and a right housing 13R, which is located on the right side of the left housing. The left housing 13L and the right housing 13R form the pair of housing halves. A plurality of screws 35 fix the left housing 13L and the right housing 13R together.

[0080] Motor 14 is an internal rotor brushless DC motor. Motor 14 has a stator 36, a rotor 37, and a rotor shaft 38. The stator 36 is arranged around the rotor 37. The rotor 37 is arranged around the rotor shaft 38. The rotor shaft 38 is fixed to the rotor 37. The rotor 37 and the rotor shaft 38 rotate about the motor's axis of rotation AX. As shown in Fig. As shown in Figure 17, the stator 36 has a stator core 36A, an insulating piece 36B and coils 36C. The rotor 37 has a rotor core 37A and a magnet 37B.

[0081] The stator core 36A is located on the outside of the rotor 37 in the radial direction of the motor's axis of rotation AX. The stator core 36A comprises a plurality of laminated steel plates. The steel plates are made of an iron-based metal. The stator core 36A has a ring shape. The stator core 36A has a plurality of teeth, each of which supports the coils 36C. The stator core 36A is held against the inner surface of the motor housing 28.

[0082] The insulating piece 36B is fixed to the stator core 36A. The insulating piece 36B is inserted between the stator core 36A and the coils 36C. The insulating piece 36B is an electrically insulating component made of a synthetic resin.

[0083] The coils 36C are mounted to the stator core 36A via the insulating piece 36B. The coils 36C are each arranged around the teeth of the stator core 36A via the insulating piece 36B. The stator core 36A and the coils 36C are electrically isolated from each other by the insulating piece 36B.

[0084] The rotor core 37A is made of steel. The rotor core 37A has a substantially cylindrical shape. The magnet 37B is arranged inside the rotor core 37A. The rotor 37 is a rotor of the type of internal permanent magnet (IPM).

[0085] The rotor shaft 38 is elongated in the top-bottom direction. The rotor shaft 38 is located inside the rotor core 37A. The rotor core 37A and the rotor shaft 38 are fixed to each other. The rotor 37 and the rotor shaft 38 rotate about the motor axis of rotation AX, which extends in the top-bottom direction.

[0086] The upper end of the rotor shaft 38 is rotatably mounted by a bearing 38A. The lower end of the rotor shaft 38 is rotatably mounted by a bearing 38B. The bearing 38A and the bearing 38B are held by the motor housing 28.

[0087] A sensor substrate 39 is arranged on the upper part of the stator 36. The sensor substrate 39 detects the rotation of the rotor 37. The sensor substrate 39 is fixed to the insulating piece 36B. The sensor substrate 39 has an annular circuit board and a magnetic sensor mounted on the circuit board. The magnetic sensor detects the position of the rotor 37 in the direction of rotation by detecting the magnetic field of the magnet 37B of the rotor 37. Detection data from the sensor substrate 39 is transmitted to the controller 19. The controller 19 controls the motor 14 based on the detection data from the sensor substrate 39.

[0088] A fan wheel 40 is fixed to the lower part of the rotor shaft 38. In the up-down direction, the fan wheel 40 is positioned between the stator 36 and the bearing 38B. When the fan wheel 40 rotates, air flows into the head housing 13 from an air intake opening 13A, which is provided on the upper part of the left housing 13L. The air flowing in from the air intake opening 13A enters the interior of the motor housing 28 through an inlet opening provided in the motor housing 28 and flows around the motor 14. The air flows around the motor 14 to cool the motor 14. The air that has flowed around the motor 14 flows out to the outside of an outlet opening provided in the motor housing 28. The air that has flowed out of the motor housing 28 flows to the outside of the head housing 13 via a discharge opening 13B, which is provided in the upper area of ​​the left housing 13L.

[0089] The power transmission mechanism 15 comprises a planetary gear mechanism. The power transmission mechanism 15 includes a first-stage planetary gear mechanism 151 and a second-stage planetary gear mechanism 152. The gearbox housing 29 accommodates the power transmission mechanism 15. As shown in Fig. As shown in Figure 18, a drive gear 15A is provided at the lower end of the rotor shaft 38. The drive gear 15A meshes with planet gears 15B of the first-stage planetary gear mechanism 151. An internal gear 15C of the first-stage planetary gear mechanism 151 is arranged around the planet gears 15B. The internal gear 15C is fixed to the inner surface of the gear housing 29. A carrier 15D of the first-stage planetary gear mechanism 151 is connected to the planet gears 15B. The carrier 15D meshes with planet gears 15E of the second-stage planetary gear mechanism 152. An internal gear 15F of the second-stage planetary gear mechanism 152 is arranged around the planet gears 15E. The internal gear 15F is fixed to the inner surface of the gear housing 29. A carrier 15G of the two-stage planetary gear mechanism 152 is connected to the internal gear 15F.

[0090] The power transmission mechanism 15 has a rotary shaft 41 which is fixed to the support 15G. The rotary shaft 41 is rotatably mounted by a bearing 42. The bearing 42 is held by a gearbox housing 2. The lower end of the rotary shaft 41 is fixed to the adapter 34 via an intermediate component 44 by a screw 43. A cover 45 is fixed to the lower surface of the adapter 34. The cover 45 is positioned such that it covers the screw 43 from below. The cover 45 is fixed to the adapter 34 by three screws 46.

[0091] The hook cover 33 is fixed to the gearbox housing 29. The hook cover 33 is fixed to the gearbox housing 29 by four screws 47. Screw bosses 29A are provided on an outer circumferential surface of the gearbox housing 29. At least a portion of the gearbox housing 29, which has the screw bosses 29A, is located inside the hook cover 33. Screw openings 33D (e.g., see figure) Fig. 41), into which the screws 47 are inserted, are provided on the bottom area of ​​the hook cover 33. The screws 47 are inserted into the screw openings 33D from below the lower surface of the hook cover 33 and then inserted into the screw holes of the screw bosses 29A.

[0092] Fig. Figure 24 shows the adapter 34 and the cover 45 as seen from the right according to the first embodiment. Fig. Figure 25 is a cross-sectional view showing the adapter 34 and the cover 45 according to the first embodiment. The adapter 34 is connected to the tool 3. The tool 3 is connected to the drive assembly 2 via the adapter 34.

[0093] The adapter 34 has a main body region 34A, a projection 34D, claw regions 34B, and connecting regions 34C. The projection 34D extends downwards from the central region of the main body region 34A. The claw regions 34B are located below the main body region 34A. The connecting regions 34C connect the ends of the claw regions 34B to the lower surface of the main body region 34A in the circumferential direction. The claw regions 34B are arranged around the projection 34D. Three claw regions 34B are provided at equal intervals around the projection 34D. At least a portion of the tool 3 is inserted into a space 34E between the lower surface of the main body region 34A and the upper surfaces of the claw regions 34B. As shown in Fig. As shown in Figure 25, the upper surfaces 34F of the claw areas 34B are inclined upwards towards the outside in the radial direction of the motor axis of rotation AX. Tool

[0094] Fig. Figure 26 shows the tool 3 as seen from the top right front according to the first embodiment. Fig. Figure 27 is an exploded view showing the tool 3 as seen from the top right front according to the first embodiment. Fig. Figure 28 is a cross-sectional view showing the tool 3 according to the first embodiment. The tool 3 comprises the brush 48, a base plate 49, an adapter 50, and screws 51.

[0095] The base plate 49 has an annular base area 49A, an annular connection area 49B, and a plurality of screw holes 49C. The connection area 49B projects radially inward from the base area 49A. The plurality of screw holes 49C are provided in the connection area 49B. The brush 48 is attached to the lower surface of the base area 49A.

[0096] Adapter 50 is connected to adapter 34. Adapter 50 has an annular body section 50A, a circumferential wall section 50B, claw sections 50C, and a plurality of screw openings 50D. The circumferential wall section 50B projects upwards from the central section of body section 50A. The claw sections 50C project radially inwards from circumferential wall section 50B. The screw openings 50D are located on the circumferential edge of body section 50A.

[0097] Three screw holes 49C are provided at equal intervals around the circumference of the connection area 49B. Three screw openings 50D are provided at equal intervals around the circumference of the body area 50A. The adapter 50 and the base plate 49 are fixed by three screws 51. The screws 51 are inserted into the screw openings 50D from above the adapter 50 and then into the screw holes 49C of the base plate 49.

[0098] The claw sections 50C are hooked onto (with) the claw sections 34B. When the claw sections 50C are hooked onto the claw sections 34B, the tool 3 is fixed to the drive assembly 2. Connection between drive assembly and tool

[0099] Fig. Figure 29 shows the tool 3, which is connected to the drive assembly 2 according to the first embodiment, as seen from the top right front. Fig. Figure 30 shows the tool 3, which is connected to the drive assembly 2 according to the first embodiment, viewed from below. As in Fig. As shown in Figure 22, three claw areas 34B with equal circumferential spacing are provided in the lower part of the adapter 34. As shown in Fig. As shown in Figure 26, three claw areas 50C are provided at equal circumferential intervals in the upper region of the adapter 50. When the claw areas 50C are hooked onto the claw areas 34B, the claw areas 50C are positioned between respective pairs of adjacent claw areas 34B. After the claw areas 50C are positioned between respective pairs of adjacent claw areas 34B, the drive assembly 2 and the tool 3 are rotated relative to each other in a first direction so that the claw areas 50C are inserted into the space 34E between the lower surface of the main body region 34A of the adapter 34 and the upper surface of the claw area 34B. The drive assembly 2 and the tool 3 are then rotated relative to each other so that the claw area 50C is inserted into the space of the adapter 34.The claw sections 50C are sandwiched between the main body section 34A of the adapter 34 and the claw sections 34B, thus fixing the tool 3 to the drive assembly 2. As described above, the upper surfaces 34F of the claw sections 34B are inclined upwards towards the outside in the radial direction of the motor's axis of rotation AX. Therefore, the claw sections 50C are sandwiched between the main body section 34A and the radially outer ends of the upper surfaces 34F of the claw sections 34B. The front areas of the upper surfaces 34F of the claw sections 34B do not come into contact with the claw sections 50C, and only the radially outer ends of the upper surfaces 34F of the claw sections 34B come into contact with the claw sections 50C. The adapter 34 can thus fix the claw sections 50C with a suitable clamping force.The drive assembly 2 and the tool 3 are rotated relatively in a second direction opposite to the first direction, so that the claw areas 50C are removed from space 34E, and the tool 3 is removed from the drive assembly 2. Protection area

[0100] Fig. Figure 31 shows the drive assembly 2 and the protective area 4 as seen from the top right front, according to the first embodiment. Fig. Figure 31 shows a virtual line representing part of the protected area 4. Fig. Figure 32 represents the protection area 4 according to the first embodiment, viewed from the top right front. Fig. Figure 33 represents the protection area 4 as seen from the right according to the first embodiment. Fig. Figure 34 represents the protection area 4 as seen from the front according to the first embodiment. Fig. Figure 35 is a cross-sectional view showing the protection area 4 according to the first embodiment. Fig. Figure 36 is an exploded view showing the protection area 4 according to the first embodiment as seen from the top right front.

[0101] The protective zone 4 can be attached to and removed from the drive assembly 2. The protective zone 4 is at least partially arranged around the tool 3. The protective zone 4 comprises a brush 52, a brush bearing 53, a bearing component 54, and a cover 55.

[0102] The brush bearing 53 has a ring shape. The brush bearing 53 is arranged around the tool 3. The brush 52 is attached to the lower surface of the brush bearing 53.

[0103] The bearing component 54 has a ring shape. At least part of the bearing component 54 is arranged inside the brush bearing 53. At least part of the bearing component 54 is arranged upwards from the brush bearing 53. The bearing component 54 supports the cover 55 from below.

[0104] The cover 55 has a disc shape. The cover 55 is fixed to the bearing component 54. An opening 59 is provided in the central area of ​​the cover 55.

[0105] The brush bearing 53 and the brush 52 are connected to the cover 55 via a floating mechanism (compensating mechanism) 57. The brush bearing 53 is an example of a moving component that is movably connected to the cover 55. The floating mechanism 57 has coil springs 58 arranged between the cover 55 and the brush bearing 53. The coil springs 58 bias the brush bearing 53 and the brush 52 downwards.

[0106] The bearing component 54 and the cover 55 are fixed by screws 56. Six screws 56 are provided. The six screws 56 are arranged at equal intervals around the circumference of the bearing component 54. The screws 56 are inserted from below into screw holes 54A provided in the bearing component 54. The screw heads of the screws 56 are inserted into the screw holes provided in the cover 55. The screws 56 are coupled to the screw holes of the cover 55 by the screws 56 inserted into the screw holes 54A of the bearing component 54, so that the bearing component 54 and the cover 55 are fixed to each other by the screws 56.

[0107] The coil springs 58 are arranged between the cover 55 and the brush bearing 53. Six coil springs 58 are provided. The six coil springs 58 are arranged at equal intervals around the circumference of the brush bearing 53. The coil springs 58 are arranged between pairs of adjacent screws 56 around the circumference. The lower ends of the coil springs 58 are connected to the brush bearing 53. The upper ends of the coil springs 58 are connected to the cover 55.

[0108] The brush bearing 53 and the brush 52 are mounted by the cover 55 via the floating mechanism 57, which includes the coil springs 58. The brush bearing 53 and the brush 52 are movable relative to the cover 55 in the up-down direction parallel to the motor axis of rotation AX. The brush bearing 53 and the brush 52 are movable relative to the cover 55 in the direction of rotation about a front-back axis perpendicular to the motor axis AX. The brush bearing 53 and the brush 52 are movable relative to the cover 55 in the direction of rotation about a left-right axis perpendicular to the motor axis of rotation AX. The front-back axis refers to an axis that passes through the motor axis of rotation AX and extends in the front-back direction. The left-right axis refers to an axis that passes through the motor axis of rotation AX and extends in the left-right direction.This means that the brush bearing 53 and the brush 52 are movable in the up-down direction, rotate or tilt in the direction of rotation about the front-back axis and pivot or tilt in the direction of rotation about the left-right axis.

[0109] As in Fig. As shown in Figure 35, the brush bearing 53 has a bearing area 53A and an engagement area 53B. The brush 52 is attached to the bearing area 53A. The engagement area 53B projects radially from the upper end of the bearing area 53A to the inside of the brush bearing 53. The bearing component 54 has a lower stop area 54S located below the engagement area 53B. The cover 55 has an upper stop area 55S located above the engagement area 53B. The engagement area 53B is movable between the lower stop area 54S and the upper stop area 55S in the up-down direction. The movable areas of the brush bearing 53 and the brush 52 in the up-down direction are defined by the lower stop area 54S and the upper stop area 55S. The brush bearing 53 and the brush 52 are movable between a lower end position and an upper end position.In the lower end position, the lower surface of the engagement area 53B is in contact with the upper surface of the lower stop area 54S. In the upper end position, the upper surface of the engagement area 53B is in contact with the lower surface of the upper stop area 55S. The movable areas of the brush bearing 53 and the brush 52 in the up-down direction are defined between the lower end position and the upper end position. In this embodiment, the movable area (movable distance) of the brush bearing 53 and the brush 52 in the up-down direction is, for example, 7 mm.

[0110] At least part of the drive assembly 2 is inserted into the opening 59 of the cover 55. The drive assembly 2 is fixed to the cover 55. In this embodiment, the hook cover 33 is inserted into the opening 59. The hook cover 33 and the cover 55 are fixed to each other.

[0111] The cover 55 has a projecting area 60 arranged around the opening 59. The projecting area 60 has an annular shape in a plane perpendicular to the motor's axis of rotation AX. The upper surface of the projecting area 60 has first bearing surfaces 61 and second bearing surfaces 62, which are at different heights than the first bearing surfaces 61. The second bearing surfaces 62 are located at positions lower than those of the first bearing surfaces 61. In the circumferential direction of the motor's axis of rotation AX, the first bearing surfaces 61 are located at positions different from those of the second bearing surfaces 62. In the plane perpendicular to the motor's axis of rotation AX, the first bearing surfaces 61 and the second bearing surfaces 62 have arc-shaped forms. Two first bearing surfaces 61 are provided spaced apart around the opening 59.Two second bearing surfaces 62 are provided at intervals around the opening 59. The second bearing surfaces 62 are located between two adjacent first bearing surfaces 61. That is, the first bearing surfaces 61 and the second bearing surfaces 62 are arranged alternately in the circumferential direction. The pair of first bearing surfaces 61 is arranged such that they face each other transversely across the motor axis of rotation AX. The external shapes and areas of the pair of first bearing surfaces 61 are identical to each other. The pair of second bearing surfaces 62 is arranged such that they face each other transversely across the motor axis of rotation AX. The external shapes and areas of the pair of second bearing surfaces 62 are identical to each other.

[0112] Guide areas 63 are provided such that they are connected to the first bearing surfaces 61. The guide areas 63 are provided on the inner surface of the cover 55, which is connected to the opening 59. Each of the guide areas 63 has a pair of vertical ribs 63A, which are provided on the inner surface of the cover 55. The vertical ribs 63A extend in the top-bottom direction.

[0113] Guide areas 64 are provided such that they are connected to the second bearing surfaces 62. The guide area 64 is provided on the inner surface of the cover 55, which is connected to the opening 59. The guide area 64 has a pair of vertical ribs 64A, which are provided on the inner surface of the cover 55. The vertical ribs 64A extend in the top-bottom direction. Attachment / removal mechanism

[0114] Fig. Figure 37 shows the attachment / removal mechanism 11 according to the first embodiment, viewed from the top left front. Fig. Figure 38 shows the attachment / removal mechanism 11 according to the first embodiment, viewed from the top right rear. Fig. Figure 39 shows the attachment / removal mechanism 11 as seen from above according to the first embodiment. Fig. Figure 40 is a cross-sectional view showing the attachment / removal mechanism 11 according to the first embodiment. Fig. Figure 41 is an exploded view showing the attachment / removal mechanism 11 according to the first embodiment as seen from the top left front. Fig. Figure 42 is an exploded view showing the attachment / removal mechanism 11 as seen from the top right rear according to the first embodiment.

[0115] The attachment / removal mechanism 11 fastens the drive assembly 2 and the protective area 4 to one another and removes (releases) them from each other. The attachment / removal mechanism 11 is provided on one or both of the drive assembly 2 and the protective area 4. In this embodiment, at least part of the attachment / removal mechanism 11 is provided on the drive assembly 2. The attachment / removal mechanism 11 includes the hook component 30, which is provided on the drive assembly 2. The hook component 30 is removably mounted on the drive assembly 2.

[0116] In this embodiment, the attachment / removal mechanism 11 comprises a hook component 30, a hook cover 33, and a preload component 68. The hook component 30 is movably mounted by the hook cover 33. The hook cover 33 is inserted into the opening 59 provided in the cover 55 of the protective area 4. The hook cover 33 is inserted into the opening 59, and the hook component 30 engages with a locking area (recess) provided on the inner surface of the cover 55, thus fixing the drive assembly 2 and the protective area 4 to one another. The hook component 30 is released from the cover 55, thereby releasing the drive assembly 2 and the protective area 4 from one another. When the hook component 30 is in an engagement state in which the hook component 30 is hooked onto the cover 55, the drive assembly 2 and the protective area 4 are fixed to each other.When the hook component 30 is in a released state in which the hook component 30 is detached from the cover 55, the fixation of the drive assembly 2 and the protective area 4 to each other is released.

[0117] Fig. Figures 37 to 42 represent the attachment / removal mechanism 11 in the intervention state.

[0118] In this embodiment, the hook component 30 comprises a first hook component 31 and a second hook component 32. The first hook component 31 and the second hook component 32 are movably mounted by the hook cover 33. The second hook component 32 is connected to at least a part of the first hook component 31. When the first hook component 31 moves, the second hook component 32 moves synchronously with the first hook component 31.

[0119] The first hook component 31 has a main body area 31A, first hook areas 31B, an actuating button area 31C, connecting holes 31D, release holes 31E and a base area 31G.

[0120] The main body area 31A has a ring shape. The main body area 31A is arranged around the rotating shaft 41, which connects the motor 14 to the tool 3. As shown in Fig. 17 and Fig. As shown in Figure 18, parts of the rotary shaft 41 and the gearbox housing 29 are inserted into the main body area 31A.

[0121] Projections 31F are provided on the left and right sides of the main body section 31A. A projection 31F on the left side of the main body section 31A projects to the left of the left end of the main body section 31A. A projection 31F on the right side of the main body section 31A projects to the right of the right end of the main body section 31A. The projections 31F increase the width of the main body section 31A in the left-right direction. The projections 31F improve the strength of the main body section 31A.

[0122] The first hook areas 31B are arranged below the main body area 31A. The first hook areas 31B are hooked onto the first interlocking areas of the cover 55 of the protective area 4. The first interlocking areas each have a recess provided on the inner surface of the cover 55. The base area 31G projects downwards from the front area of ​​the lower surface of the main body area 31A. The first hook areas 31B project forwards from the base area 31G. The first hook areas 31B are spaced apart in the left-right direction.

[0123] The actuating button area 31C is located on the front part of the main body area 31A. The actuating button area 31C projects forward from the front part of the main body area 31A. As shown in Fig. As shown in Figure 18, the actuating button area 31C projects forward from the head housing 13 of the drive assembly 2. The actuating button area 31C projects forward from the hook cover 33 of the drive assembly 2.

[0124] The connecting holes 31D are each provided on the rear portion of the main body section 31A. The connecting holes 31D penetrate the upper and lower surfaces of the main body section 31A. Two connecting holes 31D are provided on the rear portion of the main body section 31A, spaced apart in the left-right direction. At least part of the second hook component 32 is inserted into the connecting holes 31D.

[0125] The release holes 31E are located in front of the connecting holes 31D on the rear portion of the main body section 31A. The release holes 31E penetrate the upper and lower surfaces of the main body section 31A. Two release holes 31E are located on the rear portion of the main body section 31A with a gap between them in the left-right direction. At least part of the second hook component 32 is inserted into the release holes 31E.

[0126] Fig. Figure 43 shows the second hook component 32 according to the first embodiment, viewed from above. The second hook component 32 has a base area 32A, second hook areas 32B, a pivot area 32C, insertion areas 32D and projections 32E.

[0127] The base area 32A has a plate shape. The second hook areas 32B are hooked (engaged) onto the second interlocking areas of the cover 55 of the protective area 4. Each of the second interlocking areas has a recess provided on the inner surface of the cover 55. The second hook areas 32B project rearward from the base area 32A. Two second hook areas 32B are positioned with a gap between them in the left-right direction.

[0128] The pivoting section 32C has a rod shape that is elongated in the left-right direction. In the top-bottom direction, the pivoting section 32C is arranged between the insertion sections 32D and the second hook sections 32B. The second hook sections 32B are arranged downwards from the insertion sections 32D. As shown in Fig. As shown in Figure 43, a pivot axis CX of the pivoting area 32C extends in the left-right direction. The pivoting area 32C is pivotally mounted by the hook cover 33.

[0129] Fig. 43 represents the second hook component 32 in the engaged state. As in Fig. Figure 43 shows that, when viewed from above, the extension line of the pivot axis CX of the pivot area 32C passes the upper surface of the second hook areas 32B. In the engaged state, the line of the pivot axis CX of the pivot area 32C crosses the upper surface of the second hook areas 32B when viewed from above.

[0130] The insertion areas 32D project upwards from the upper surface of the base area 32A. Two insertion areas 32D are provided with a gap between them in the left-right direction. The insertion areas 32D are inserted into the connecting holes 31D of the first hook component 31. The insertion areas 32D are inserted into the connecting holes 31D such that the first hook component 31 and the second hook component 32 are connected to each other.

[0131] The projections 32E extend forward from the front surface of the base area 32A. Two projections 32E are provided with a gap between them in the left-right direction. A left projection 32E extends forward from an upper left area on the front surface of the base area 32A. A right projection 32E extends forward from an upper right area on the front surface of the base area 32A. The projections 32E can be inserted into the release holes 31E.

[0132] The hook cover 33 has a cup shape. The hook cover 33 has a cylindrical area 33A, a bottom area 33B, a flange area 33C, screw openings 33D, first hook holes 33E, second hook holes 33F, bearing ribs 33G, bearing ribs 33H, a bearing rib 33J and sliding areas 67.

[0133] The cylindrical area 33A is arranged around the motor's axis of rotation AX. As shown in Fig. 17 and Fig. As shown in Figure 18, parts of the rotary shaft 41 and the gearbox housing 29 are inserted into the cylindrical section 33A. The cylindrical section 33A is inserted into the opening 59 of the protective area 4.

[0134] The base area 33B has a plate shape and is arranged inside the cylindrical area 33A. The base area 33B is connected to the inner surface of the cylindrical area 33A in such a way that it covers the lower area of ​​the cylindrical area 33A.

[0135] The flange section 33C is located at the upper end of the cylindrical section 33A. The flange section 33C projects outwards in the radial direction of the motor's axis of rotation AX from the upper end of the cylindrical section 33A.

[0136] The lower surface of the flange region 33C has first supported surfaces 65 and second supported surfaces 66, which are at different heights than the first supported surfaces 65. The second supported surfaces 66 are located at positions higher than those of the first supported surfaces 65. In the circumferential direction of the motor axis of rotation AX, the first supported surfaces 65 are located at positions different from those of the second supported surfaces 66. In the plane perpendicular to the motor axis of rotation AX, the first supported surfaces 65 and the second supported surfaces 66 have arc-shaped profiles. Two first supported surfaces 65 are spaced apart around the cylindrical region 33A. Two second supported surfaces 66 are spaced apart around the cylindrical region 33A. The second supported surfaces 66 are located between adjacent first supported surfaces 65.This means that the first supported surfaces 65 and the second supported surfaces 66 are arranged alternately in the circumferential direction. The pair of first supported surfaces 65 is arranged such that they are opposite each other transversely across the motor axis of rotation AX. The outer shapes and areas of the pair of first supported surfaces 65 are identical to each other. A pair of second supported surfaces 66 is arranged such that they are opposite each other transversely across the motor axis of rotation AX. The outer shapes and areas of the pair of second supported surfaces 66 are identical to each other.

[0137] The screw openings 33D penetrate the upper and lower surfaces of the base region 33B. Four screw openings 33D are provided in the base region 33B. The screws 47 are inserted into the screw openings 33D. The screws 47 secure the hook cover 33 and the gearbox housing 29 to each other. The hook cover 33 is fixed to the gearbox housing 29 by four screws 47. The screw bosses 29A are provided on the outer circumferential surface of the gearbox housing 29. At least a portion of the gearbox housing 29, which has the screw bosses 29A, is located inside the hook cover 33. The screws 47 are inserted into the screw openings 33D from below the lower surface of the hook cover 33 and then inserted into the screw holes of the screw bosses 29A.

[0138] The first hook holes 33E are provided on the front portion of the cylindrical portion 33A. The first hook holes 33E penetrate the inner and outer surfaces of the cylindrical portion 33A. The first hook sections 31B of the first hook component 31 are movably arranged in the first hook holes 33E. Two first hook holes 33E are spaced apart in the left-right direction according to the first hook sections 31B. The base section 31G of the first hook component 31 is located on the inside of the cylindrical portion 33A. The first hook sections 31B, which project forward from the base section 31G, are inserted into the first hook holes 33E from the inner surface of the cylindrical portion 33A. The first hook sections 31B are movable between engagement positions and release positions. The engagement positions are located on the outside of the cylindrical portion 33A.The release positions are located on the inside of the outer surface of the cylindrical area 33A. The first hook areas 31B are arranged in the engagement positions such that they are brought into an engagement state in which they are hooked onto the first interlocking areas of the cover 55. When the first hook areas 31B are in the release positions, they are in a release state in which they are detached from the first interlocking areas of the cover 55.

[0139] The second hook holes 33F are provided on the rear portion of the cylindrical portion 33A. The second hook holes 33F penetrate the inner and outer surfaces of the cylindrical portion 33A. The second hook sections 32B of the second hook component 32 are movably arranged within the second hook holes 33F. Two second hook holes 33F are spaced apart in the left-right direction corresponding to the second hook sections 32B. The base section 32A of the second hook component 32 is located inside the cylindrical portion 33A. The second hook sections 32B, which project rearward from the base section 32A, are inserted into the second hook holes 33F from the inner surface of the cylindrical portion 33A. The second hook sections 32B are movable between engagement and release positions. The engagement positions are located outside the outer surface of the cylindrical area 33A.The release positions are located on the inside of the outer surface of the cylindrical area 33A. The second hook areas 32B are positioned in the engagement positions such that they are engaged and hooked onto the second interlocking areas of the cover 55. The second hook areas 32B are positioned in the release positions such that they are released from the second interlocking areas of the cover 55.

[0140] The bearing ribs 33G project upwards from the upper surface of the base area 33B. Four bearing ribs 33G are provided at intervals. The first hook component 31 is supported on the upper surfaces of the bearing ribs 33G. The bearing ribs 33G support the first hook component 31 in such a way that it is movable. The first hook component 31 is movable in the front-back direction in a state in which it is supported by the bearing ribs 33G. Two bearing ribs 33G are arranged on the left side of the center of the cylindrical area 33A in the left-right direction. Two bearing ribs 33G are arranged on the right side of the center of the cylindrical area 33A in the left-right direction. The two left-hand bearing ribs 33G are arranged at intervals in the front-back direction. The two right bearing ribs 33G are arranged with gaps in the front-back direction.The left bearing ribs 33G support the left area of ​​the lower surface of the main body area 31A. The right bearing ribs 33G support the right area of ​​the lower surface of the main body area 31A.

[0141] The bearing ribs 33H project upwards from the upper surface of the base area 33B. Two bearing ribs 33H are provided at left-right intervals on the rear area of ​​the base area 33B. Recesses 33I, provided on the upper areas of the bearing ribs 33H, support the pivot area 32C of the second hook component 32. The bearing ribs 33H support the second hook component 32 in such a way that it is pivotable. The second hook component 32 is pivotable about the pivot axis CX in a state in which it is supported by the bearing ribs 33H.

[0142] The bearing rib 33J projects upwards from the upper surface of the base area 33B. The bearing rib 33J is located in a position opposite the base area 31G of the first hook component 31.

[0143] The sliding areas 67 are provided on the outer surface of the cylindrical area 33A. The sliding areas 67 are arranged below the first supported surfaces 65. The sliding areas 67 are arranged between respective pairs of first hook holes 33E. The sliding areas 67 each have a pair of vertical ribs 67A provided on the outer surface of the cylindrical area 33A. The vertical ribs 67A are designed to extend in the top-bottom direction. When the hook cover 33 is inserted into the opening 59 of the guard area 4, the guide area 63 or the guide area 64 provided on the guard area 4 guides the sliding areas 67.

[0144] The pretensioning component 68 pretensions the hook component 30 such that the hook component 30 approaches the protection zone 4. The pretensioning component 68 applies a pretension such that the first hook sections 31B of the first hook component 31 approach the first interlocking areas of the cover 55 of the protection zone 4, and the second hook sections 32B of the second hook components approach the second interlocking areas of the cover 55 of the protection zone 4. That is, the pretensioning component 68 applies a pretension such that the first hook sections 31B and the second hook sections 32B move to the engagement positions.

[0145] The preloading element 68 is arranged between the first hook component 31 and at least a part of the hook cover 33, which supports the first hook component 31 in such a way that it is movable. In this embodiment, the preloading element 68 is arranged between the front surface of the bearing rib 33J of the hook cover 33 and the rear surface of the base region 31G of the first hook component 31. The preloading element 68 is a coil spring. The front end of the preloading element 68 is connected to the base region 31G of the first hook component 31. The rear end of the preloading element 68 is connected to the bearing rib 33J of the hook cover 33. A projection 31H is provided on the rear surface of the base region 31G. The projection 31H is inserted into the front end of the preloading element 68. The projection 31H positions the front end of the prestressing component 68.

[0146] The pretensioning element 68 pretensions the first hook element 31 such that the first hook element 31 approaches the protection zone 4. The first hook element 31 and the second hook element 32 are connected via the entry areas 32D. The pretensioning element 68 pretensions the second hook element 32 via the first hook element 31 such that the second hook element 32 approaches the protection zone 4.

[0147] In a state in which the hook cover 33 is inserted into the opening 59 of the protective area 4, when the first hook component 31 and the second hook component 32 are pretensioned by the pretensioning component 68, an engagement state is created in which the first hook areas 31B of the first hook component 31 and the second hook areas 32B of the second hook component 32 are hooked onto the protective area 4.

[0148] In a state in which the hook cover 33 is inserted into the opening 59 of the protective area 4, when the actuating button area 31C, which is provided on the first hook component 31, is actuated against a preload force of the preload component 68, a release state is created in which the first hook areas 31B and the second hook areas 32B are separated (removed, separated) from the protective area 4.

[0149] Fig. Figure 44 shows the attachment / removal mechanism 11 according to the first embodiment, viewed from the top left front. Fig. Figure 45 shows the attachment / removal mechanism 11 according to the first embodiment, viewed from the top right rear. Fig. Figure 46 shows the attachment / removal mechanism 11 as seen from above according to the first embodiment. Fig. Figure 47 is a cross-sectional view showing the attachment / removal mechanism 11 according to the first embodiment.

[0150] Fig. Figures 44 to 47 represent the attachment / removal mechanism 11 in the detached state.

[0151] To move the attachment / removal mechanism 11 from the engaged state to the released state, the user pushes the actuating button area 31C backward. When the actuating button area 31C is pushed backward, the first hook component 31 moves backward against the preload force of the preload component 68. As the first hook component 31 moves backward, the first hook sections 31B also move backward. That is, the first hook sections 31B move from the engaged positions to the released positions. The first hook sections 31B, having moved to the released positions, are released (removed) from the first locking areas provided on the cover 55 of the guard area 4.

[0152] When the first hook component 31 moves backward, the connecting holes 31D, into which the insertion sections 32D are inserted, also move backward. The insertion sections 32D are pushed backward through the inner surfaces of the connecting holes 31D. As the insertion sections 32D move backward, the second hook component 32 rotates about the pivot area 32C. The insertion sections 32D are located above the pivot area 32C. The second hook sections 32B are located below the pivot area 32C. As the insertion sections 32D move backward and the second hook component 32 pivots about the pivot area 32C, the second hook sections 32B move forward. That is, the second hook sections 32B move from the engagement positions to the release positions.The second hook areas 32B, which have moved to the release positions, are released from the second interlocking areas provided on the cover 55 of the protection area 4.

[0153] As described above, to move the attachment / removal mechanism 11 from the engaged state to the released state, only the actuating button area 31C is pushed backward to separate the first hook areas 31B and the second hook areas 32B from the protective area 4. The attachment / removal mechanism 11 transitions from the engaged state to the released state.

[0154] To attach the guard 4 to the drive assembly 2 in a state where the drive assembly 2 is separated from the guard 4, the user inserts the drive assembly 2 into the opening of the guard 4. When the hook cover 33 is inserted into the opening 59, the first hook sections 31B and the second hook sections 32B are pressed against the inner surface of the cover 55. That is, when pressed against the inner surface of the cover 55, the first hook sections 31B and the second hook sections 32B move from the engagement positions to the release positions against the preload force of the preloading component 68.When the hook cover 33 is sufficiently inserted into the opening 59 and reaches a certain position, the first hook areas 31B and the second hook areas 32B are opposite the interlocking areas (first interlocking areas and second interlocking areas) provided on the inner surface of the cover 55. When the first hook areas 31B and the second hook areas 32B are opposite the interlocking areas, the preload force of the preloading component 68 moves the first hook areas 31B and the second hook areas 32B from the release positions to the engagement positions. When the first hook areas 31B and the second hook areas 32B are interlocked with the interlocking areas, the drive assembly 2 and the guard area 4 are fixed to each other.

[0155] It is noted that, for example, if the first hook component 31 and the second hook component 32 are not correctly connected to each other, or if the hook cover 33 does not correctly support at least one of the first hook component 31 and the second hook component 32, the projections 32E of the second hook component 32 will not be inserted into the release holes 31E of the first hook component 31, and the projections 32E will lift the first hook component 31. Therefore, for example, it is prevented that the hook cover 33 is fixed to the gearbox housing 29 in a state in which the first hook component 31 and the second hook component 32 are not correctly connected to each other, or in a state in which the hook cover 33 does not correctly support at least one of the first hook component 31 and the second hook component 32. Adjustment mechanism

[0156] Fig. Figure 48 is an exploded view showing the adjustment mechanism 12 as seen from the top right front according to the first embodiment. Fig. Figure 49 shows the front area of ​​the scrubber 1 according to the first embodiment, viewed from the top right front.

[0157] The adjustment mechanism 12 adjusts (sets) the height of the protective area 4 relative to the drive assembly 2 according to the mounting position of the drive assembly 2 relative to the protective area 4. The adjustment mechanism 12 adjusts the height of the protective area 4 to a first height and a second height.

[0158] In this embodiment, the mounting position of the drive assembly 2 with respect to the protective area 4 is located in the circumferential direction of the motor's axis of rotation AX. When the drive assembly 2 is mounted in a first circumferential mounting position of the protective area 4, the protective area 4 is adjusted (set) to the first height. When the drive assembly 2 is mounted in a second circumferential mounting position of the protective area 4, the protective area 4 is adjusted to the second height.

[0159] Fig. 16 represents a state in which the protection area 4 is adjusted to the first height. Fig. 49 represents a state in which the protection area 4 is adjusted to the second height.

[0160] The adjustment mechanism 12 is provided on one or both of the protective area 4 and the drive assembly 2. In this embodiment, the adjustment mechanism 12 has a first adjustment area 121, which is provided on the protective area 4, and a second adjustment area 122, which is provided on the drive assembly 2. The first adjustment area 121 has the upper surface of the projecting area 60. The second adjustment area 122 has the lower surface of the flange area 33C.

[0161] The first adjustment area 121 has the first bearing surfaces 61 and the second bearing surfaces 62. The first bearing surfaces 61 support the second adjustment area 122. The second bearing surfaces 62 are arranged at positions different from those of the first bearing surfaces 61 in the circumferential direction and have heights that differ from those of the first bearing surfaces 61. The second bearing surfaces 62 are arranged at positions lower than those of the first bearing surfaces 61. The first bearing surfaces 61 and the second bearing surfaces 62 are arranged around the opening 59 of the protective area 4. The first bearing surfaces 61 and the second bearing surfaces 62 are provided on the upper surface of the projecting area 60 that is arranged around the opening 59.

[0162] The second adjustment area 122 has the first supported surfaces 65 and the second supported surfaces 66. The first adjustment area 121 supports the first supported surfaces 65. The second supported surfaces 66 are located at positions different from those of the first supported surfaces 65 in the circumferential direction and have heights different from those of the first supported surfaces 65. The second supported surfaces 66 are located at positions higher than those of the first supported surfaces 65. The first supported surfaces 65 and the second supported surfaces 66 are located at the upper end of the hook cover 33. The first supported surfaces 65 and the second supported surfaces 66 are located on the lower surface of the flange area 33C, which is located at the upper end of the hook cover 33.

[0163] As in Fig. As shown in Figure 16, in a case where the protective area 4 is set to the first height, the mounting position of the drive assembly 2 in the circumferential direction with respect to the protective area 4 is determined such that the second supported surfaces 66 are opposite the second support surfaces 62, with the first supported surfaces 65 being supported by the first support surfaces 61. In a case where the drive assembly 2 is inserted into the opening 59 such that the protective area 4 is at the first height, the guide area 63 guides the sliding areas 67. The guide area 63 is designed to be connected to the first support surfaces 61.

[0164] As in Fig. As shown in Figure 48, in a case where the protective area 4 is transferred from the first height to the second height, the user detaches the protective area 4 from the drive assembly 2, rotates the protective area 4 by 90 degrees and then inserts the drive assembly 2 into the opening 59 of the protective area 4.

[0165] As in Fig. As shown in Figure 49, in a case where the protective area 4 is adjusted to the second height, the mounting position of the drive assembly 2 in the circumferential direction with respect to the protective area 4 is determined such that the second supported surfaces 66 are opposite the first supported surfaces 61, with the first supported surfaces 65 being supported by the second supported surfaces 62. In a case where the drive assembly 2 is inserted into the opening 59 such that the protective area 4 is positioned at the second height, the guide area 64 guides the sliding areas 67. The guide area 64 is designed to be connected to the second supported surfaces 62.

[0166] Fig. 50 represents the protection area 4, which has heights adjusted by the adjustment mechanism 12 according to the first embodiment. Fig. In step 50, the protective zone 4 of the left scrubber 1 is adjusted to a first height H1, and the protective zone 4 of the right scrubber 1 is adjusted to a second height H2. Fig. Figure 50 indicates the heights (first height H1 and second height H2) of the protection zone 4, representing the vertical distances between the lower end of the head housing 13 and the upper surface of the protection zone 4. It should be noted that the heights of the protection zone 4 can also be vertical distances between the surface of the cleaning target and the lower end of the protection zone 4.

[0167] As described above, the brush bearing 53 and the brush 52 are connected to the cover 55 via the floating mechanism 57. The brush bearing 53 and the brush 52 are movable in the up-down direction relative to the cover 55. A difference ΔH between the first height H1 and the second height H2 is defined as a movable distance between the brush bearing 53 and the brush 52 in the up-down direction. As described above, the movable distance between the brush bearing 53 and the brush 52 in the up-down direction is, for example, 7 mm. The difference ΔH between the first height H1 and the second height H2 is, for example, 7 mm. Operation

[0168] The operation of the scrubber 1 is described below. The user grips the front handle 8 with one hand and the grip area 16B with the other. When the user operates the trigger lever 17, with the drive assembly 2 attached to the guard area 4, the motor 14 is driven, and the tool 3 rotates. As the tool 3 rotates with the brush 48 in contact with the cleaning target, the target is cleaned. If the tool 3 is rotating while a cleaning fluid is sprayed onto the cleaning target, the cleaning fluid may splash around the tool 3. The guard area 4 is positioned around the tool 3 and prevents the cleaning fluid from splashing.

[0169] The drive assembly 2 and the rod 6 are connected to each other via the swivel range 10. The rod 6 and the main body assembly 5 can be adjusted to any angle when the tool 3 and the guard area 4 are in contact with the cleaning target, allowing the user to perform cleaning work with good feasibility.

[0170] When the tool 3 comes into partial contact with the cleaning target while rotating, the scrubber 1 can be vibrated (wobbed, shaken, moved). The cover 55, to which the drive assembly 2 is attached, and the brush bearing 53 are connected via the floating mechanism 57. Even when the scrubber 1 is vibrated (shaked, moved), the brush 52, which is attached to the brush bearing 53, can maintain contact with the cleaning target, thus preventing the scrubber 1 from being vibrated.

[0171] Wear and deformation of the brush 48 can change the height of its lower end, which comes into contact with the cleaning target. To prevent the scrubber 1 from wobbling (shaking), i.e., to ensure that the brush 52 of the guard area 4 is always in contact with the cleaning target, the lower end of the brush 52 of the guard area 4 is preferably positioned lower than the lower end of the brush 48 of the tool 3. In this embodiment, an adjustment mechanism 12 is provided for setting the height of the guard area 4. If the height of the lower end of the brush 48 changes due to wear and deformation of the brush 48, the user can adjust the height of the guard area 4 according to the height of the lower end of the brush 48, so that the brush 52 of the guard area 4 is always in contact with the cleaning target.

[0172] The difference ΔH between the first height H1 and the second height H2 is defined as a movable distance of the brush bearing 53 in the top-bottom direction. This allows the brush 52 of the protective area 4 to come into contact with the cleaning target even if the height of the lower end of the brush 48 changes.

[0173] To change the height of guard zone 4 or to perform maintenance on guard zone 4, guard zone 4 must be detached (removed) from drive assembly 2. The user can easily detach guard zone 4 from drive assembly 2 simply by pressing the actuating button area 31C. The user can remove guard zone 4 from drive assembly 2 with a single movement. Furthermore, when attaching guard zone 4 to drive assembly 2, the user can easily attach guard zone 4 to drive assembly 2 simply by inserting the drive assembly 2 into the opening 59 of guard zone 4. The user can attach guard zone 4 to drive assembly 2 with a single movement. Effects

[0174] As described above, in the embodiment of the scrubber 1, the drive assembly 2, which includes the motor 14 rotating about the motor axis AX extending in the top-bottom direction, the tool 3 which is opposite (facing) the cleaning target and is rotated by the motor 14, the protective area 4 which is arranged at least partially around the tool 3, and the attachment / removal mechanism 11 which includes the hook component 30 and is configured to attach and detach the drive assembly 2 and the protective area 4.

[0175] In the configuration described above, the protective area 4 of the scrubber 1 can be smoothly attached and removed by the attachment / removal mechanism 11, which has the hook component 30.

[0176] In this embodiment, the attachment / removal mechanism 11 is provided on one or both of the drive assembly 2 and the protective area 4.

[0177] In the configuration described above, the attachment / removal mechanism 11 is provided on one or both of the drive assembly 2 and the protective area 4, thus preventing an increase in the size of the scrubber 1.

[0178] In this embodiment, the hook component 30 is movably mounted by the drive assembly 2.

[0179] In the configuration described above, the protective area 4 of the scrubber 1 can be smoothly attached and removed by the hook component 30, which is movably mounted by the drive assembly 2.

[0180] In this embodiment, the hook component 30 comprises the first hook component 31 and the second hook component 32, which is connected to at least a part of the first hook component 31 and which moves synchronously with the first hook component 31.

[0181] In the configuration described above, by actuating the first hook component 31, the second hook component 32 moves synchronously with the first hook component 31, so that the protective area 4 of the scrubber 1 can be attached and removed with good operability.

[0182] In this embodiment, the first hook component 31 has the main body area 31A, which is arranged around the rotating shaft 41 that connects the motor 14 to the tool 3, and the first hook areas 31B, which are arranged below the front area of ​​the main body area 31A and are hooked onto the guard area 4.

[0183] In the configuration described above, the main body area 31A is arranged around the rotating shaft 41, thus preventing an increase in size for the attachment / removal mechanism 11. The protective area 4 of the scrubber 1 can be attached and removed by the first hook component 31.

[0184] In this embodiment, the first hook component 31 has the actuating button area 31C, which is provided on the front area of ​​the main body area 31A and projects forward from the head housing 13 of the drive assembly 2.

[0185] In the configuration described above, the protective area 4 of the scrubber 1 can be easily attached and removed by simply actuating the operating button area 31C.

[0186] In this embodiment, the first hook component 31 has the connecting holes 31D, which are provided on the rear area of ​​the main body area 31A and into which at least a part of the second hook component 32 is inserted.

[0187] In the configuration described above, the first hook component 31 and the second hook component 32 are connected via the connecting holes 31D.

[0188] In this embodiment, the second hook component 32 has the insertion areas 32D, which are inserted into the connecting holes 31D, and the second hook areas 32B, which are arranged below the insertion areas 32D and which are hooked (engaged) on the protective area 4.

[0189] In the configuration described above, the first hook component 31 and the second hook component 32 are connected via the connecting holes 31D and the insertion areas 32D, which are inserted into the connecting holes 31D. The protective area 4 of the scrubber 1 can be smoothly attached and removed by the second hook component 32.

[0190] In this embodiment, the second hook component 32 has the pivot area 32C, which is arranged between the insertion areas 32D and the second hook areas 32B in the top-bottom direction.

[0191] In the configuration described above, when the first hook component 31 moves in the front-back direction, the second hook component 32 pivots so that the second hook areas can be moved.

[0192] In this embodiment, when viewed from above, the extension line of the pivot axis CX of the pivot area 32C crosses the upper surface of the second hook areas 32B.

[0193] In the configuration described above, the force with which the protective area 4 is to be released from the drive assembly 2 prevents the second hook component 32 from pivoting.

[0194] In this embodiment, the drive assembly 2 has the hook cover 33, which is inserted into the opening 59 provided in the protective area 4. The hook cover 33 supports the first hook component 31 and the second hook component 32.

[0195] In the configuration described above, the hook cover 33, which is inserted into the opening 59 of the protective area 4, supports the first hook component 31 and the second hook component 32, so that the protective area 4 of the scrubber 1 can be smoothly attached and removed.

[0196] In this embodiment, the hook cover 33 has the cylindrical area 33A, which is inserted into the opening 59, and the sliding areas 67, which are provided on the outer surface of the cylindrical area 33A and by the guide area 63 or the guide area 64, which are provided on the protective area 4.

[0197] In the configuration described above, the hook cover 33 is guided through the guide area 63 or the guide area 64, so that the hook cover 33 can be smoothly inserted into the opening 59.

[0198] In the embodiment, the cylindrical area 33A has the first hook holes 33E, in which the first hook areas 31B of the first hook component are movably arranged, and the second hook holes 33F, in which the second hook areas 32B of the second hook component 32 are movably arranged.

[0199] In the configuration described above, the first hook areas 31B can move between the engagement and release positions in a state in which they are held by the hook cover 33. The second hook areas 32B can also move between the engagement and release positions in a state in which they are held by the hook cover 33.

[0200] In this embodiment, the attachment / removal mechanism 11 has the pretensioning component 68, which pretensions the hook component 30 such that the hook component 30 approaches the protective area 4.

[0201] In the configuration described above, the hook component 30 and the protective area 4 are stably engaged with each other.

[0202] In this embodiment, the hook component 30 comprises the first hook component 31 and the second hook component 32, which is connected to at least a portion of the first hook component 31 and moves synchronously with the first hook component 31. The pretensioning component 68 is arranged between the first hook component 31 and at least a portion of the hook cover 33, which supports the first hook component 31 in such a way that it is movable. The pretensioning component 68 pretensions the first hook component 31 such that the first hook component 31 approaches the protective zone 4. The pretensioning component 68 pretensions the second hook component 32 via the first hook component 31, so that the second hook component 32 approaches the protective zone 4.

[0203] In the configuration described above, the hook component 30 and the protective area 4 are stably engaged with each other. Furthermore, the second hook component 32 moves synchronously with the first hook component 31 when the first hook component 31 is actuated, so that the protective area 4 of the scrubber 1 can be attached and removed with ease of use.

[0204] In this embodiment, the drive assembly 2 includes the hook cover 33, which is inserted into the opening 59 provided in the protective area 4. The hook cover 33 can support the hook component 30 in such a way that it is movable. When the pretensioning component 68 pretensions the first hook component 31 and the second hook component 32 when the hook cover 33 is inserted into the opening 59, an engagement state is created in which the first hook sections 31B of the first hook component 31 and the second hook sections 32B of the second hook component 32 are hooked onto the protective area 4. When the actuating button section 31C, which is provided on the first hook component 31, is actuated against the pretensioning force of the pretensioning component 68, a release state is created in which the first hook sections 31B and the second hook sections 32B are separated from the protective area 4.

[0205] In the configuration described above, the user of the scrubber 1 can attach and remove the protective area 4 with a single movement. Second embodiment

[0206] A second embodiment is described. In the following description, the same or equivalent components as those of the embodiment described above are designated with the same reference numerals, and the description of the components is simplified or omitted.

[0207] Fig. Figure 51 represents an attachment / removal mechanism 111 according to the second embodiment, viewed from the top left front. Fig. Figure 52 shows the attachment / removal mechanism 111 according to the second embodiment, viewed from the top right rear. Fig. Figure 53 shows the attachment / removal mechanism 111 according to the second embodiment, viewed from above. Fig. Figure 54 shows the attachment / removal mechanism 111 in an engaged state and a released state according to the second embodiment, viewed from above. Fig. Figure 55 shows the attachment / removal mechanism 111 in the engaged state and the released state according to the second embodiment, viewed from the right.

[0208] In the first embodiment described above, an example was described in which the actuating button area 31C of the first hook component 31 is actuated and the second hook component 32 is linked to the first hook component 31. In the second embodiment, an example is described in which a first hook component 131 and a second hook component 132 move independently.

[0209] A hook cover 133 movably supports the first hook component 131 and the second hook component 132 in the front-back direction. The second hook component 132 is arranged behind the first hook component 131. The first hook component 131 has two first hook areas 131B. The second hook component 132 has two second hook areas 132B. The shape and size of the first hook component 131 are essentially the same as the shape and size of the second hook component 132.

[0210] First hook holes 133E are provided on the front portion of a cylindrical section of the hook cover 133. The first hook sections 131B are removable and located at the first hook holes 133E. Second hook holes 133F are provided on the rear portion of the cylindrical section of the hook cover 133. The second hook sections 132B are movable and located at the second hook holes 133F.

[0211] The hook cover 133 has a pair of bearing ribs 133J. A first pretensioning element 168 is arranged between the first hook element 131 and one of the bearing ribs 133J. A second pretensioning element 168 is arranged between the second hook element 132 and the other of the bearing ribs 133J. The first pretensioning element 168 pretensions the first hook element 131 such that the first hook element 131 approaches the protection zone 4. The second pretensioning element 168 pretensions the second hook element 132 such that the second hook element 132 approaches the protection zone 4.

[0212] In the engaged state of the attachment / removal mechanism 111, the first hook component 131 and the second hook component 132 are positioned in engagement by a preload force of the preload components 168. When the attachment / removal mechanism 111 transitions from the engaged state to the disengaged state, the user moves the first hook component 131 and the second hook component 132 so that they approach each other in the front-back direction. The user can initiate the transition of the attachment / removal mechanism 111 from the engaged state to the disengaged state by causing the first hook component 131 and the second hook component 132 to approach each other against the preload force of the preload components 168. Third embodiment

[0213] A third embodiment is described. In the following description, the same or equivalent components as those of the embodiment described above are designated with the same reference numerals, and the description of the components is simplified or omitted.

[0214] Fig. Figure 56 represents an attachment / removal mechanism 211 according to the third embodiment, viewed from the top left front. Fig. Figure 57 shows the attachment / removal mechanism 211 according to the third embodiment, viewed from the top right rear. Fig. Figure 58 shows the attachment / removal mechanism 211 according to the third embodiment, viewed from above. Fig. Figure 59 shows the attachment / removal mechanism 211 in an engaged state and a released state according to the third embodiment, viewed from above. Fig. Figure 60 shows the attachment / removal mechanism 211 in the engaged state and the released state according to the third embodiment, viewed from the right.

[0215] In the first embodiment described above, the first hook component 31 and the second hook component 32 move in the front-back direction. The third embodiment describes an example in which a first hook component 231 and a second hook component 232 move in the left-right direction.

[0216] The attachment / removal mechanism 211 comprises an actuating component 230, a first hook component 231, and a second hook component 232. A hook cover 233 movably supports the actuating component 230 in the forward-backward direction. The hook cover 233 movably supports the first hook component 231 and the second hook component 232 in the left-right direction. The second hook component 232 is located on the right side of the first hook component 231.

[0217] A guide hole 230A is provided on the left side of the actuating component 230. A guide hole 230B is provided on the right side of the actuating component 230. Guide hole 230A is inclined to the left, towards the rear. Guide hole 230B is inclined to the right, towards the rear.

[0218] The first hook component 231 has two first hook areas 231B. The second hook component 232 has two second hook areas 232B. The shape and size of the first hook component 231 are essentially the same as the shape and size of the second hook component 232.

[0219] The first hook component 231 has a sliding area 231G, which is arranged in the guide hole 230A. The second hook component 232 has a sliding area 232G, which is arranged in the guide hole 230B.

[0220] First hook holes 233E are provided on the left side of a cylindrical section of the hook cover 233. The first hook sections 231B are movably arranged in the first hook holes 233E. Second hook holes 233F are arranged on the rear side of the cylindrical section of the hook cover 233. The second hook sections 232B are movably arranged in the second hook holes 233F.

[0221] The hook cover 233 has a pair of bearing ribs 233J. A first pretensioning element 268 is arranged between the first hook element 231 and one of the bearing ribs 233J. A second pretensioning element 268 is arranged between the second hook element 232 and the other of the bearing ribs 233J. The first pretensioning element 268 pretensions the first hook element 231 such that the first hook element 231 approaches the protection zone 4. The second pretensioning element 268 pretensions the second hook element 232 such that the second hook element 232 approaches the protection zone 4.

[0222] In the engaged state of the attachment / removal mechanism 211, the first hook component 231 and the second hook component 232 are positioned at engagement points by a preload force of the preload components 268. To move the attachment / removal mechanism 211 from the engaged state to the released state, the user moves the actuating component 230 backward. When the actuating component 230 is moved backward, the sliding area 231G of the first hook component 231, which is located in the guide hole 230A, is pressed by the inner surface of the guide hole 230A to move it to the right, and the sliding area 232G of the second hook component 232, which is located in the guide hole 230B, is pressed by the inner surface of the guide hole 230B to move it to the left.When the sliding area 231G of the first hook component 231, which is located in the guide hole 230A, moves to the right, the first hook component 231 moves from an engaged position to a released position. When the sliding area 232G of the second hook component 232, which is located in the guide hole 230B, moves to the left, the second hook component 232 moves from an engaged position to a released position. This causes the attachment / removal mechanism 211 to transition from the engaged state to the released state. Fourth embodiment

[0223] A fourth embodiment is described. In the following description, the same or equivalent components as those of the embodiment described above are designated with the same reference numerals, and the description of the components is simplified or omitted.

[0224] Fig. Figure 61 represents an adjustment mechanism 112 according to the fourth embodiment, viewed from the top right front. Fig. Figure 62 is an exploded view showing the adjustment mechanism 112 according to the fourth embodiment as seen from the top right front. Fig. Figure 63 is an exploded view showing the adjustment mechanism 112 according to the fourth embodiment as seen from the top right front. Fig. Figure 64 shows the adjustment mechanism 112 according to the fourth embodiment, viewed from the top right front. Fig. 65 represents a protective area 104 which has a height that is set by the adjustment mechanism 112, according to the fourth embodiment.

[0225] A sleeve 70 is arranged around the lower part of the drive assembly 2. A screw (threaded) 71 is provided around the opening of the protective area 104. When the sleeve 70 is coupled (screwed) to the screw 71, the protective area 104 is attached to the drive assembly 2.

[0226] A supported surface 165 is provided on the drive assembly 2. A first supported surface 161 and second supported surfaces 162 are provided around the opening of the protective area 104. The second supported surfaces 162 are arranged at positions lower than those of the first supported surface 161.

[0227] As in Fig. Figure 61 shows that when the sleeve 70 is coupled to the screw 71, while the supported surface 165 is supported by the first supported surface 161, the protected area 104 is arranged at a first height H1.

[0228] When the protection area 104 is changed from the first height H1 to the second height H2, the coupling between the sleeve 70 and the screw 71 is released, as shown in Fig. 62 is shown, and then the protection area 104 is rotated by 90 degrees, as in Fig. Figure 63 shows that after inserting the drive assembly 2 into the opening of the protective area 104, so that the second bearing surfaces 162 support the supported surface 165, the sleeve 70 is coupled with the screw 71, thereby arranging the protective area 104 at the second height H2, as shown in Figure 63. Fig. 64 shown. Fifth embodiment

[0229] A fifth embodiment is described. In the following description, the same or equivalent components as those of the embodiment described above are designated with the same reference numerals, and the description of the components is simplified or omitted.

[0230] Fig. Figure 66 shows an adjustment mechanism 212 according to the fifth embodiment, viewed from the top right front. Fig. Figure 67 is an exploded view showing the adjustment mechanism 212 according to the fifth embodiment as seen from the top right front. Fig. Figure 68 is an exploded view showing the adjustment mechanism 212 according to the fifth embodiment as seen from the top right front. Fig. 69 represents the guide area 204, which has a height that is set by the adjustment mechanism 212 according to the fifth embodiment.

[0231] In the first embodiment described above, an example was described in which the adjustment mechanism 212 changes the height of the protective area 4 by changing the mounting position of the drive assembly 2 in the circumferential direction with respect to the protective area 4. In the fifth embodiment, an example is described in which the height of the protective area 204 is changed by changing the mounting position of the drive assembly 2 in the top-bottom direction with respect to the protective area 204.

[0232] In this embodiment, the protective area 204 is divided into a left protective area 204L and a right protective area 204R. The rear portion of the left protective area 204L and the rear portion of the right protective area 204R are coupled via a hinge mechanism 80. A fixing device 81 fixes the front portion of the left protective area 204L and the front portion of the right protective area 204R to each other.

[0233] A first groove 265 and a second groove 266 are provided on the outer circumferential surface of the lower region of the drive assembly 2. The first groove 265 has a first bearing surface. The second groove 266 has a second bearing surface. The first groove 265 and the second groove 266 are designed to surround the motor axis of rotation AX. The second groove 266 is located at a position higher than that of the first groove 265. A projecting area is provided on the inner circumferential surface of the opening of the protective area 204. The projecting area is inserted into a groove formed by the first groove 265 and the second groove 266.

[0234] As in Fig. Figure 66 shows that when the fixing device 81 fixes the front area of ​​the left protective area 204L and the front area of ​​the right protective area 204R to each other, with the protruding area of ​​the protective area 204 inserted into the first groove 265, the protective area 204 is arranged at the first height H1.

[0235] If the protection zone 204 is changed from the first height H1 and the second height H2, as in Fig. As shown in Figure 67, after the fixing provided by the fixing device 81 is released to separate the left protective area 204L and the right protective area 204R from each other, the fixing device 81 holds the front area of ​​the left protective area 204L and the front area of ​​the right protective area 204R together, so that the projecting area of ​​the protective area 204 is inserted into the second groove 266. This causes the protective area 204 to be positioned at the second height H2, which is shown in Fig. 68 is shown.

[0236] Although the invention has been described with regard to a complete and unambiguous disclosure in respect of certain embodiments, the attached claims are not to be regarded as limiting, but are to be interpreted as encompassing all modifications and alternative constructions that a person skilled in the art might consider and which appropriately fall within the basic teaching set forth herein.

[0237] It is explicitly emphasized that all features disclosed in the description and / or the claims are to be considered separate and independent of one another for the purposes of the original disclosure as well as for the purpose of limiting the claimed invention, irrespective of the combinations of features in the embodiments and / or the claims. It is explicitly stated that all range specifications or specifications of groups of units disclose every possible intermediate value or subgroup of units for the purposes of the original disclosure as well as for the purpose of limiting the claimed invention, in particular also as a boundary of a range specification. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 5 432 970 B2

[0002]

Claims

[1] Scrub brush, with a drive assembly comprising a motor that rotates about a motor axis extending in an up-down direction, a tool that faces a cleaning target and is rotated by the motor, a protective area that is at least partially arranged around the tool, and an attachment / removal mechanism that includes a hook component and is configured to attach and detach the drive assembly and the protective area from each other. [2] Scrubber according to claim 1, wherein the attachment / removal mechanism is provided on one or both of the drive assembly and the protective area. [3] Scrubber according to claim 2, wherein the hook component is movably mounted by the drive assembly. [4] Scrubber according to claim 3, wherein the hook component comprises a first hook component and a second hook component which is connected to at least a part of the first hook component and moves synchronously with the first hook component. [5] Scrubber according to claim 4, where the first hook component a main body area arranged around a rotating shaft that connects the motor to the tool, and has a first hook area that is located below a front area of ​​the main body area and is hooked onto the protective area. [6] Scrubber according to claim 5, wherein the first hook component has an actuating button area which is provided on the front area of ​​the main body area and which projects forward from a head housing of the drive assembly. [7] Scrubber according to claim 5, wherein the first hook component has a connecting hole which is provided in a rear area of ​​the main body area and into which at least a part of the second hook component is inserted. [8] Scrubber according to claim 7, wherein the second hook component has an insertion area which is inserted into the connecting hole and a second hook area which is arranged below the insertion area and which is hooked onto the protective area. [9] Scrubber according to claim 8, wherein the second hook component has a pivoting area which is arranged between the insertion area and the second hook area in the top-bottom direction. [10] Scrubber according to claim 9, wherein, when viewed from above, an extent line of a pivot axis of the pivot area crosses an upper surface of the second hook area. [11] Scrubber according to claim 4, in which the drive assembly has a hook cover that is inserted into an opening provided in the protective area, and The hook cover stores the first hook component and the second hook component. [12] Scrubber according to claim 11, wherein the hook cover has a cylindrical area that is inserted into the opening and a sliding area that is provided on an outer surface of the cylindrical area and is guided by a guide area that is provided on the protective area. [13] Scrubber according to claim 12, wherein the cylindrical area has a first hook hole in which a first hook area of ​​the first hook component is movably arranged, and a second hook hole in which a second hook area of ​​the second hook component is movably arranged. [14] Scrubber according to claim 3, wherein the attachment / removal mechanism has a pre-tensioning component which pre-tensions the hook component such that the hook component approaches the protected area. [15] Scrubber according to claim 14, in which the hook component comprises a first hook component and a second hook component, which is connected to at least a part of the first hook component and which moves synchronously with the first hook component, the prestressing component is arranged between the first hook component and at least one part of a hook cover, which supports the first hook component in such a way that it is movable, The prestressing component prestresses the first hook component in such a way that the first hook component approaches the protected area, and The prestressing component prestresses the second hook component over the first hook component, so that the second hook component approaches the protected area. [16] Scrubber according to claim 15, where the drive assembly has a hook cover that is inserted into an opening provided on the protective area, The hook cover stores the hook component in such a way that it is movable, When the prestressing component prestresses the first hook component and the second hook component with the hook cover when inserted into the opening, an engagement state is created in which a first hook area of ​​the first hook component and a second hook area of ​​the second hook component are hooked onto the protective area, and When an actuating button area provided on the first hook component is actuated against a preload force of the preload component, a release state is created in which the first hook area and the second hook area are separated from the protective area.

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