Electric floor scrubber

Abstract

The present invention relates to a floor cleaning device, specifically an electric floor scrubber, wherein a main bracket is mounted on a fixed plate assembly, roller assemblies are arranged on both sides of the main bracket, and a motor is installed in the main bracket; the roller assembly comprises an inner roller, an outer roller, a main shaft, a support assembly and a transmission member, the support assembly is arranged on the fixed plate assembly, one end of the main shaft is rotatably mounted on the support assembly, and the other end is connected with a transmission member, the motor is connected with the main shafts in the roller assemblies on both sides through a transmission mechanism installed inside the fixed plate assembly, and drives the main shafts on both sides to rotate synchronously in the opposite direction; the inner roller is rotatably mounted on the support assembly, the outer roller is mounted outside the inner roller, the transmission member is linked with the main shaft, and is transmitted through the inner roller and the outer roller, or directly connected with the outer roller, and the outer roller is wrapped with a mop for wiping the floor. The present invention does not generate a gap in the middle, so that the coverage width of the floor scrubber is close to the width of the machine itself when wiping the floor, and the front and rear counter-rotating arrangement is more efficient and cleaner.

Description

Technical Field

[0001] The invention relates to a floor cleaning device, in particular to an electric floor scrubbing machine. Background Art

[0002] A mopping robot navigated by a navigation box has a drag plate with a water storage box installed at the front, and a cleaning cloth installed under the drag plate. When starting to work, the water in the water storage box continuously seeps into the cleaning cloth to humidify it. Since the water in the water storage box is limited, it will be used up quickly; at the same time, the cleaning cloth will also get dirty quickly, resulting in a very limited cleaning area at one time. To continue cleaning, it is necessary to manually add water to the water storage box and replace the cleaning cloth; if the cleaning area is large, the above operations need to be repeated many times, and more navigation boxes need to be arranged, resulting in it being still cumbersome during use.

[0003] The utility model patent "front and rear motion type floor mop" announced on September 18, 2013, with the authorization announcement number CN203195624U, uses a cam mechanism to realize the high-frequency reciprocating motion of the front and rear wiping plates to realize the mopping function. However, the "front and rear motion type floor mop" still needs to be manually replaced and cleaned. The non-constant torque during the operation of the cam mechanism causes the machine to produce large vibration noise, and affects reliability and durability. In addition, there are also some electric floor mopping machines with left and right double-wheel counter-rotation on the market. The left and right wheels rotate to drive the mop under the wheels to realize the mopping function, but there will inevitably be a gap between the wheels, so the wiping effect in the gap is poor, and it cannot really cover the width equivalent to the machine body. If it is to be covered, the operating handle needs to be dragged multiple times; and it also needs to be manually replaced and cleaned multiple times. The above two electric floor mopping machines can only play a limited role in reducing labor intensity and have poor control performance. Summary of the invention

[0004] In order to solve the above problems, the object of the present invention is to provide an electric floor scrubbing machine.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] The present invention comprises a roller assembly, a fixed plate assembly, a main bracket, a motor and a transmission mechanism, wherein the main bracket is mounted on the fixed plate assembly, roller assemblies are arranged on both sides of the main bracket, and a motor is installed in the main bracket; the roller assembly comprises an inner roller, an outer roller, a main shaft, a support assembly and a transmission member, wherein the support assembly is arranged on the fixed plate assembly, one end of the main shaft is rotatably mounted on the support assembly, and the other end is connected with a transmission member, the motor is connected with the main shafts in the roller assemblies on both sides through a transmission mechanism installed inside the fixed plate assembly, and drives the main shafts on both sides to rotate synchronously in the opposite direction; the inner roller is rotatably sleeved on the support assembly, the outer roller is sleeved outside the inner roller, the transmission member is linked with the main shaft, and the transmission is transmitted through the inner roller and the outer roller, or the transmission member is directly connected with the outer roller, thereby driving the outer rollers on both sides of the main bracket to rotate in the opposite direction, and the outer rollers are wrapped with mops for wiping the floor;

[0007] Wherein: the support assembly is a bearing seat, which is mounted on the fixed plate assembly, and the main shaft is rotatably mounted inside the bearing seat; the inner roller is sleeved outside the bearing seat and rotatably connected to the bearing seat;

[0008] The support assembly includes a bearing seat and a support member, the bearing seat is mounted on the fixed plate assembly, the main shaft is passed through the bearing seat and is rotatably connected with the bearing seat; the support member is mounted on the main shaft and is linked with the main shaft; the inner roller is sleeved outside the support member, supported by the support member, and rotates synchronously with the support member;

[0009] The main shaft is rotatably connected to the bearing seat through a bearing, a locking piece is sleeved on the main shaft, and the locking piece is threadedly connected to an end of the bearing seat away from the fixed plate assembly to limit the axial position of the bearing;

[0010] The support assembly is a fixed plate and a support member, the fixed plate is the fixed plate assembly, the fixed plate is a hollow structure, one end of the main shaft is rotatably mounted in the fixed plate; the support member is mounted on the main shaft and linked to the main shaft; the inner roller is sleeved outside the support member, supported by the support member, and rotates synchronously with the support member;

[0011] The inner roller has meshing teeth evenly distributed along the circumferential direction at one end away from the fixed plate assembly, and tooth grooves evenly distributed along the circumferential direction on the inner surface of the inner roller near the end; the transmission member is located inside one end of the inner roller, and the outer surface has external teeth evenly distributed along the circumferential direction that mesh with the tooth grooves for transmission; an engaging cylinder is installed inside one end of the outer roller away from the fixed plate assembly, and the engaging teeth are evenly distributed on the engaging cylinder along the circumferential direction, and the engaging teeth on the engaging cylinder mesh with the engaging teeth on the inner roller for transmission;

[0012] When the transmission member is directly connected to the outer drum for transmission, it is located outside the inner drum and inside the outer drum. The end of the transmission member away from the fixed plate assembly is uniformly provided with meshing teeth along the circumferential direction. An meshing cylinder is installed inside the end of the outer drum away from the fixed plate assembly. The meshing cylinder is uniformly provided with meshing teeth along the circumferential direction. The meshing teeth on the meshing cylinder mesh with the meshing teeth on the transmission member for transmission.

[0013] The fixed plate assembly includes a fixed plate and an outer cover, the outer cover is a hollow structure, and a fixed plate is arranged inside, the main bracket and the support assembly are both mounted on the fixed plate, and the transmission mechanism is accommodated in the outer cover;

[0014] The end of the other end of the main shaft is connected to the limit cap of the limit transmission member, and the limit cap is provided with a stop; a locking assembly is installed at the end of the outer drum away from the fixed plate assembly, and the locking assembly includes a button, a mounting disk, a spring and a hook-shaped member, the mounting disk is fixed to the bite cylinder, and a button movable in the axial direction is provided on the mounting disk, and hook-shaped members are symmetrically provided on both sides of the button, and the hook-shaped members are located in the outer drum, and the hook-shaped members on each side are hinged to the mounting disk, one end abuts against the button, and the other end is hook-shaped, and the hook-shaped members on both sides are connected by the spring;

[0015] The transmission mechanism is a gear set, which includes an even number of gears greater than two. A gear is connected to the output shaft of the motor, and the number of gears on one side of the gear is one more than the number of gears on the other side, thereby achieving synchronous reverse rotation of the main shafts on both sides of the main bracket.

[0016] The advantages and positive effects of the present invention are:

[0017] The present invention symmetrically arranges roller assemblies on the front and rear sides of the main bracket. The rollers in the two roller assemblies rotate in opposite directions. Compared with a left-right counter-rotating floor scrubber, no gap is generated in the middle, so that the coverage width of the floor scrubber when scrubbing the floor is close to the width of the machine itself. The front-back counter-rotating arrangement has higher scrubbing efficiency and is cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention after the roller assembly is removed;

[0020] Figure 3 for Figure 2 Exploded diagram of

[0021] Figure 4 It is a structural cross-sectional view of Embodiment 1 of the present invention;

[0022] Figure 5 It is a structural cross-sectional view of the second embodiment of the present invention;

[0023] Figure 6 for Figure 5 The structural cross-sectional view of the middle drum assembly after removing the outer drum;

[0024] Figure 7 It is a structural cross-sectional view of the third embodiment of the present invention;

[0025] Figure 8 for Figure 7 The structural cross-sectional view of the middle drum assembly after removing the outer drum;

[0026] Fig. 9 It is a structural cross-sectional view of the fourth embodiment of the present invention;

[0027] Fig.10 This is a structural front view of the inner drum of the present invention;

[0028] Fig.11 It is a schematic diagram of the three-dimensional structure of the inner drum of the present invention;

[0029] Fig.12 It is a three-dimensional structural schematic diagram of the bite tube of the present invention;

[0030] Fig.13 A schematic diagram of the structure of the transmission member of the present invention;

[0031] Fig.14 It is a structural cross-sectional view of the locking assembly of the present invention;

[0032] Fig.15 Another structural schematic diagram of the transmission member of the present invention;

[0033] Wherein: 1 is a roller assembly, 101 is an inner roller, 102 is an outer roller, 103 is an engaging cylinder, 104 is a main shaft, 105 is a bearing seat, 106 is a bearing A, 107 is a bearing B, 108 is a bearing C, 109 is a locking member, 110 is a transmission member, 111 is a limit cap, 112 is a support member, 113 is an engaging tooth, 114 is a tooth groove, and 115 is an external tooth;

[0034] 2 is a fixing plate assembly, 201 is an outer cover plate, 202 is an inner cover plate, 203 is a hole, and 204 is a fixing plate;

[0035] 3 is the main bracket, 4 is the motor, 5 is the gear set, and 6 is the connecting piece;

[0036] 7 is a locking assembly, 701 is a button, 702 is a mounting plate, 703 is a rotating shaft, 704 is a hook-shaped member, and 705 is a spring. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] The present invention includes a roller assembly 1, a fixed plate assembly 2, a main bracket 3, a motor 4 and a transmission mechanism, wherein the main bracket 3 is installed on the fixed plate assembly 2, and roller assemblies 1 are provided on both sides of the main bracket 3, and a motor 4 is installed in the main bracket 3; the roller assembly 1 includes an inner roller 101, an outer roller 102, a main shaft 104, a support assembly and a transmission member 110, and the support assembly is arranged on the fixed plate assembly 2, one end of the main shaft 104 is rotatably installed on the support assembly, and the other end is connected to the transmission member 110, and the motor 4 is connected to the main shaft 104 in the roller assemblies 1 on both sides through a transmission mechanism installed inside the fixed plate assembly 2, and drives the main shafts 104 on both sides to rotate synchronously in the opposite direction. The inner drum 101 is rotatably mounted on the supporting assembly, the outer drum 102 is mounted outside the inner drum 101 and supported by the inner drum 101, the transmission member 110 is linked to the main shaft 104, and the transmission is transmitted through the inner drum 101 and the outer drum 102, or the transmission member 110 and the outer drum 102 are directly connected to drive, thereby driving the outer drums 102 on both sides of the main bracket 3 to rotate in the opposite direction, and the outer drum 102 is wrapped with a mop for wiping the floor.

[0039] Embodiment 1

[0040] like Figures 1 to 4 and Figures 10 to 14 As shown, the fixed plate assembly 2 of this embodiment includes a fixed plate 204 and an outer cover, which is divided into an outer cover plate 201 and an inner cover plate 202. The inner and outer cover plates 202 and 201 are connected to form an outer cover with a hollow structure, and the fixed plate 204 is fixed in the outer cover; three holes 203 are opened on the inner cover plate 202, and the main bracket 3 passes through the middle hole 203, and the other two holes 203 are used for the support components on both sides to pass through. The main bracket 3 and the support components on both sides are installed on the fixed plate 204, and the transmission mechanism is placed in the outer cover. A connecting member 6 is installed on the main bracket 3, and the operating handle of the floor scrubber is connected to the connecting member 6 through a universal joint.

[0041] The transmission mechanism of this embodiment is a gear set 5, which includes an even number of gears greater than two. A gear is connected to the output shaft of the motor 4, and the number of gears on one side of the gear is one more than the number of gears on the other side, thereby realizing synchronous reverse rotation of the main shafts 104 on both sides of the main bracket 3.

[0042] The supporting assembly of the present embodiment is a bearing seat 105, one end of which passes through the hole 203 on the inner cover plate 202 and is fixedly connected to the fixed plate assembly 2. The main shaft 104 is rotatably mounted inside the bearing seat 105 through bearings A106 and bearings B107. The bearings A106 and B107 are respectively located near the two ends of the bearing seat 105 to support and limit the main shaft 104. One end of the main shaft 104 is connected to the motor 4 through the gear set 5 and is driven to rotate by the motor 4. The other end of the main shaft 104 passes through the bearing seat 105 and is connected to a limit cap 111 at the end for axially limiting the transmission member 110, and a stop is provided on the limit cap 111. The other end of the bearing seat 105 is threadedly connected with a locking piece 109, which is located in the inner drum 101 and has a through hole in the middle for the spindle 104 to pass through. The locking piece 109 is provided with a stopper on the side facing the bearing seat 105, which is used to axially limit the outer ring of the bearing B107, and the inner ring of the bearing B107 is axially limited by the shoulder on the spindle 104. The outer ring of the bearing A106 is axially limited by the stopper on the inner surface of the bearing seat 105, and the inner ring is axially limited by the shoulder on the spindle 104. The inner drum 101 is sleeved outside the bearing seat 105 and is rotatably connected to the bearing seat 105 through the bearing C108. The inner ring of the bearing C108 is axially limited by the stopper on the outer surface of the bearing seat 105, and the outer ring is axially limited by the stopper on the inner surface of the inner drum 101.

[0043] The transmission member 110 of this embodiment is transmitted through the inner drum 101 and the outer drum 102. The transmission member 110 is located between the locking member 109 and the limit cap 111, and is located inside the inner drum 101 at one end away from the fixed plate assembly 2. The transmission member 110 of this embodiment is disc-shaped, key-connected to the main shaft 104, and a plurality of external teeth 115 are evenly distributed on the outer surface along the circumferential direction.

[0044] The inner drum 101 and the outer drum 102 of this embodiment are both hollow cylinders with openings at both ends. The inner drum 101 has meshing teeth 113 evenly distributed along the circumferential direction at one end away from the fixed plate assembly 2, and the inner surface of the inner drum 101 near the end has tooth grooves 114 evenly distributed along the circumferential direction with the same number as the external teeth 115, and the external teeth 115 on the transmission member 110 mesh with the tooth grooves 114 for transmission. The outer drum 102 has a meshing cylinder 103 installed inside at one end away from the fixed plate assembly 2, and the meshing teeth 113 evenly distributed on the meshing cylinder 103 along the circumferential direction, and the meshing teeth 113 on the meshing cylinder 103 mesh with the meshing teeth 113 on the inner drum 101 for transmission.

[0045] A locking assembly 7 is installed at one end of the outer drum 102 away from the fixed plate assembly 2. The locking assembly 7 includes a button 701, a mounting disk 702, a spring 705 and a hook-shaped member 704. The mounting disk 702 is fixed on the engaging cylinder 103. An axially movable button 701 is provided in the middle of the mounting disk 702. Hook-shaped members 704 are symmetrically provided on both sides of the button 701. The hook-shaped members 704 are located in the outer drum 102. The hook-shaped members 704 on each side are hinged to the mounting disk 702 through a rotating shaft 703, one end abuts against the button 701, and the other end is hook-shaped. The hook-shaped members 704 on both sides are connected by a spring 705. The outer roller 102 is inserted into and pushed to the root of the inner roller 101 from the end away from the fixed plate assembly 2. The engaging teeth 113 on the inner roller 101 are meshed with the engaging teeth 113 on the engaging tube 103. The two hook-shaped parts 704 in the locking assembly 7 are hooked at the stop on the limit cap 111. In this way, the inner roller 101 can be driven to rotate when the main shaft 104 rotates, and the inner roller 101 then drives the outer roller 102 to rotate.

[0046] Embodiment 2

[0047] like Figures 1 to 3 , Figures 5-6 , Fig.12 and Figures 14-15 As shown, the difference between this embodiment and the first embodiment is that the transmission member 110 of this embodiment is directly connected to the outer drum 102 for transmission, one end of the inner drum 101 of this embodiment is conical and the other end is cylindrical, the inside of the cylindrical part is rotatably connected to the bearing seat 105 through the bearing C108, and the conical part facilitates the insertion of the outer drum 102. The difference between the locking member 109 of this embodiment and the first embodiment is that the locking member 109 is located outside the inner drum 101. The transmission member 110 of this embodiment is located outside the inner drum 101 and inside the outer drum 102, and the end of the transmission member 110 away from the fixed plate assembly 2 is uniformly distributed with meshing teeth 113 along the circumferential direction. An engaging cylinder 103 is installed inside one end of the outer drum 102 away from the fixed plate assembly 2. An engaging cylinder 103 is installed inside one end of the outer drum 102 away from the fixed plate assembly 2. Engaging teeth 113 are evenly distributed on the engaging cylinder 103 along the circumferential direction. The engaging teeth 113 on the engaging cylinder 103 mesh with the engaging teeth 113 on the transmission member 110 for transmission. The rest is the same as that of the first embodiment.

[0048] Embodiment 3

[0049] like Figures 1 to 3 , Figures 7-8 and Figures 10 to 14As shown, the difference between this embodiment and the first embodiment is that the support assembly of this embodiment includes a bearing seat 105 and a support member 112. The other end of the bearing seat 105 and the locking member 109 threadedly connected to the end are located inside the inner drum 101 near the end of the fixed plate assembly 2; the support member 112 is sleeved on the main shaft 104 and key-connected with the main shaft 104. The support member 112 is located on the side of the locking member 109 away from the fixed plate assembly 2. The inner drum 101 is sleeved outside the support member 112 and supported by the support member 112. The transmission member 110, the inner drum 101, the outer drum 102, the transmission between the transmission member 110 and the inner drum 101, and the transmission between the inner drum 101 and the outer drum 102 of this embodiment are the same as those of the first embodiment. The main shaft 104 drives the transmission member 110 to rotate, and the transmission member 110 drives the inner drum 101 to rotate. At the same time, the main shaft 104 also drives the support member 112 to rotate, so that the inner drum 101 and the support member 112 can rotate synchronously. In this embodiment, the transmission member 110 can be eliminated, and the support member 112 can be connected with the inner drum 101 through a key to achieve synchronous rotation. The rest is the same as the first embodiment.

[0050] Embodiment 4

[0051] like Figures 1 to 3 and Figures 9 to 14 As shown, the difference between this embodiment 1 and the embodiment 1 is that the support assembly of this embodiment is a fixed plate 204 and a support member 112, and the fixed plate 204 is the fixed plate assembly 2, which is equivalent to combining the bearing seat 105, the outer cover and the fixed plate 204 in the embodiment 1 into one. The fixed plate 204 of this embodiment is a hollow structure, and one end of the main shaft 104 is rotatably mounted in the fixed plate 204 through the bearing A106 and the bearing B107. The outer rings of the bearings A106 and B107 are limited by the stoppers in the fixed plate 204, and the inner rings are limited by the shaft shoulders on the main shaft 104. The support member 112 is sleeved on the main shaft 104 and is keyed to the main shaft 104. The support member 112 is located inside one end of the inner drum 101 close to the fixed plate assembly 2. The transmission member 110, the inner drum 101, the outer drum 102, the transmission between the transmission member 110 and the inner drum 101, and the transmission between the inner drum 101 and the outer drum 102 of this embodiment are the same as those of the first embodiment. The main shaft 104 drives the transmission member 110 to rotate, and the transmission member 110 drives the inner drum 101 to rotate. At the same time, the main shaft 104 also drives the support member 112 to rotate, so that the inner drum 101 and the support member 112 can rotate synchronously. The transmission member 110 can also be eliminated in this embodiment, and the support member 112 can be connected to the inner drum 101 through a key to achieve synchronous rotation. The rest is the same as the first embodiment.

[0052] The working principle of the present invention is:

[0053] During installation, the outer drum 102 is inserted from the end of the inner drum 101 away from the fixing plate assembly 2 and pushed to the root, and the force exerted by the limiting cap 111 on the other ends of the two hook-shaped members 704 causes the two hook-shaped members 704 to rotate outwards and open around their respective rotation shafts 703 until the limiting cap 111 enters between the two hook-shaped members 704, and the two hook-shaped members 704 are reset under the action of the spring 705 and locked at the stop on the limiting cap 111. Then wrap the outer drum 102 with a cylindrical mop.

[0054] When mopping the floor, the hand-operated handle can make the mopping machine realize universal operation, and the operation is extremely flexible. When the motor 4 works, the gear set 5 drives the main shafts 104 on both sides to rotate in reverse, and the main shafts 104 then drive the inner drum 101 and the outer drum 102 to rotate synchronously, and the outer drum 102 drives the mop to rotate and mop the floor. Compared with the left and right counter-rotating mopping machine, there is no gap in the middle, so that the coverage width of the mopping machine when mopping the floor is close to the width of the machine itself. The front and rear counter-rotating arrangement has higher mopping efficiency and is cleaner.

[0055] When removing, the button 701 in the locking assembly 7 is pressed by hand, so that the hook-shaped members 704 on both sides overcome the elastic force of the spring 705 and open, and the outer drum 102 can be pulled out.

Claims

1. An electric floor scrubber, characterized in that: The invention comprises a roller assembly (1), a fixed plate assembly (2), a main bracket (3), a motor (4) and a transmission mechanism, wherein the main bracket (3) is mounted on the fixed plate assembly (2), roller assemblies (1) are provided on both sides of the main bracket (3), and a motor (4) is installed in the main bracket (3); the roller assembly (1) comprises an inner roller (101), an outer roller (102), a main shaft (104), a support assembly and a transmission member (110), the support assembly is arranged on the fixed plate assembly (2), one end of the main shaft (104) is rotatably mounted on the support assembly, and the other end is connected to the transmission member (110), and the motor (4) is installed The transmission mechanism installed inside the fixed plate assembly (2) is connected to the main shafts (104) in the roller assemblies (1) on both sides, and drives the main shafts (104) on both sides to rotate synchronously in the opposite direction; the inner roller (101) is rotatably mounted on the support assembly, and the outer roller (102) is mounted outside the inner roller (101); the transmission member (110) is linked to the main shaft (104), and is driven by the inner roller (101) and the outer roller (102), or the transmission member (110) and the outer roller (102) are directly connected to drive, thereby driving the outer rollers (102) on both sides of the main bracket (3) to rotate in the opposite direction, and the outer rollers (102) are wrapped with mops for wiping the floor; The fixed plate assembly (2), the main bracket (3) and the roller assemblies (1) on both sides of the main bracket (3) form a "mountain" configuration, and the end of the main bracket (3) away from the fixed plate assembly (2) is in a suspended state; An engaging cylinder (103) is installed inside one end of the outer cylinder (102) away from the fixing plate assembly (2); The other end of the main shaft (104) is connected to a limit cap (111) of a limit transmission member (110), and a stopper is provided on the limit cap (111); a locking assembly (7) is installed at the end of the outer drum (102) away from the fixed plate assembly (2), and the locking assembly (7) comprises a button (701), a mounting plate (702), a spring (705) and a hook-shaped member (704); the mounting plate (702) is fixed to the engaging cylinder ( 103), a button (701) movable in the axial direction is provided on the mounting plate (702), hook-shaped members (704) are symmetrically provided on both sides of the button (701), and the hook-shaped members (704) are located in the outer drum (102), and the hook-shaped members (704) on each side are hinged to the mounting plate (702), one end of the hook-shaped members (704) is in contact with the button (701), and the other end is hook-shaped, and the hook-shaped members (704) on both sides are connected by the spring (705).

2. The electric floor scrubber according to claim 1, characterized in that: The support assembly is a bearing seat (105), the bearing seat (105) is mounted on the fixed plate assembly (2), the main shaft (104) is rotatably mounted inside the bearing seat (105), and the inner roller (101) is sleeved outside the bearing seat (105) and is rotatably connected to the bearing seat (105).

3. The electric floor scrubber according to claim 1, characterized in that: The support assembly comprises a bearing seat (105) and a support member (112); the bearing seat (105) is mounted on the fixed plate assembly (2); the main shaft (104) is passed through the interior of the bearing seat (105) and is rotatably connected to the bearing seat (105); the support member (112) is mounted on the main shaft (104) and is linked to the main shaft (104); the inner roller (101) is sleeved outside the support member (112), is supported by the support member (112), and rotates synchronously with the support member (112).

4. The electric floor scrubber according to claim 2 or 3, characterized in that: The main shaft (104) is rotatably connected to the bearing seat (105) via a bearing. A locking piece (109) is sleeved on the main shaft (104). The locking piece (109) is threadedly connected to an end of the bearing seat (105) away from the fixed plate assembly (2) to axially limit the bearing.

5. The electric floor scrubber according to claim 1, characterized in that: The support assembly comprises a fixed plate (204) and a support member (112); the fixed plate (204) is the fixed plate assembly (2); the fixed plate (204) is a hollow structure; one end of the main shaft (104) is rotatably mounted in the fixed plate (204); the support member (112) is mounted on the main shaft (104) and is linked to the main shaft (104); the inner roller (101) is sleeved outside the support member (112), supported by the support member (112), and rotates synchronously with the support member (112).

6. The electric floor scrubber according to claim 1, characterized in that: The inner roller (101) has meshing teeth (113) evenly distributed along the circumferential direction at one end away from the fixed plate assembly (2), and has tooth grooves (114) evenly distributed along the circumferential direction on the inner surface of the end close to the end; the transmission member (110) is located inside one end of the inner roller (101), and has outer teeth (115) evenly distributed along the circumferential direction on the outer surface for meshing with the tooth grooves (114) for transmission; the meshing cylinder (103) has meshing teeth (113) evenly distributed along the circumferential direction, and the meshing teeth (113) on the meshing cylinder (103) mesh with the meshing teeth (113) on the inner roller (101) for transmission.

7. The electric floor scrubber according to claim 1, characterized in that: When the transmission member (110) is directly connected to the outer drum (102) for transmission, it is located outside the inner drum (101) and inside the outer drum (102); one end of the transmission member (110) away from the fixed plate assembly (2) is evenly distributed with meshing teeth (113) along the circumferential direction; the meshing cylinder (103) is evenly distributed with meshing teeth (113) along the circumferential direction; the meshing teeth (113) on the meshing cylinder (103) mesh with the meshing teeth (113) on the transmission member (110) for transmission.

8. The electric floor scrubber according to claim 1, characterized in that: The fixed plate assembly (2) comprises a fixed plate (204) and an outer cover, the outer cover being a hollow structure with the fixed plate (204) arranged inside, the main bracket (3) and the supporting assembly being mounted on the fixed plate (204), and the transmission mechanism being accommodated in the outer cover.

9. The electric floor scrubber according to claim 1, characterized in that: The transmission mechanism is a gear set (5), the gear set (5) comprising an even number of gears greater than two, a gear being connected to the output shaft of the motor (4), the number of gears on one side of the gear being one more than the number of gears on the other side, thereby achieving synchronous reverse rotation of the main shafts (104) on both sides of the main bracket (3).

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