A floor scrubbing machine

Abstract

The present invention discloses a floor scrubbing machine, comprising a movable frame, on which a sewage tank and a clean water tank are mounted; a rotatable front axle is mounted at the front bottom of the frame, with front support arms fixedly connected at both ends of the front axle, and scrubbing rollers rotatably connected to the front support arms; a power roller is provided at the front top of the sewage tank, a support roller is provided below the power roller, and a cleaning roller is provided below and behind the support roller; a scrubbing belt is wrapped around the scrubbing roller, the power roller, the cleaning roller, and the support roller, and the scrubbing roller, the power roller, and the cleaning roller are in contact with the inner surface of the scrubbing belt, and the support roller is in contact with the outer surface of the scrubbing belt; a water collecting trough is provided below the cleaning roller, and a roller brush is provided above and behind the cleaning roller for cleaning the scrubbing belt; a water spray pipe connected to the clean water tank is provided above the cleaning roller, and a pressure roller is provided behind the power roller for squeezing the scrubbing belt; the floor scrubbing machine also includes a lifting and lowering drive mechanism for driving the scrubbing roller to rise and fall. The machine can clean the scrubbing belt while scrubbing the floor, achieving an excellent floor scrubbing effect.

Description

Technical Field

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

[0002] Frequent floor cleaning is necessary in high-traffic areas like shopping malls, train stations, and exhibition halls. Current cleaning methods rely on manual labor or cleaning equipment. Existing equipment primarily uses mopping, which simulates manual labor, and disc-wiping, which uses a rotating disc to drive the mop. Both methods fail to clean the floor components, such as the mop, during the cleaning process, resulting in poor cleaning results. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a floor scrubbing machine which can clean the scrubbing parts during the floor cleaning process in order to achieve the purpose of cleaning the scrubbing parts and scrubbing the floor at the same time in view of the above-mentioned defects.

[0004] In order to achieve the above-mentioned purpose of the invention, the present invention provides a floor scrubbing machine with the following structure, including a frame, a front walking wheel, a rear walking wheel and a steering handle that drives the floor scrubbing machine to turn, and the movement of the frame is achieved by driving the front walking wheel or the rear walking wheel by a walking drive device; its structural characteristics are: a sewage tank and a clean water tank are installed on the frame; a front axle with two ends extending from both sides of the frame and capable of rotation is installed at the front bottom of the frame, and the two ends of the front axle are respectively fixedly connected to a forward-extending front support arm, and a scrubbing roller is rotatably connected to the front support arm; a power roller is provided on the upper part of the sewage tank, a support roller is provided below the power roller, and a cleaning roller is provided at the rear lower part of the support roller, and the two ends of the power roller, support roller and cleaning roller are respectively rotatably connected to the two sides of the sewage tank. On the side wall; the scrubbing belt is wrapped around the scrubbing roller, power roller, cleaning roller and supporting roller, the scrubbing roller, power roller and cleaning roller are in contact with the inner surface of the scrubbing belt, and the supporting roller is in contact with the outer surface of the scrubbing belt; a water collecting tank is provided under the cleaning roller, and the cleaning roller is partially located in the water collecting tank. A roller brush capable of brushing the scrubbing belt is provided above the rear of the cleaning roller, and the rotation of the power roller and the roller brush is driven by the scrubbing power device; a water spray pipe connected to the clean water tank and capable of spraying water to the scrubbing belt is provided above the cleaning roller, and a pressure roller is provided behind the power roller, whose two ends are rotatably connected to the two side walls of the sewage tank and can cooperate with the power roller to squeeze the scrubbing belt; the floor scrubbing machine also includes a lifting drive mechanism that drives the front axle to rotate to lift or lower the scrubbing roller.

[0005] The rear bottom of the frame is equipped with a rear axle with two ends extending out from both sides of the frame and capable of rotation. The two ends of the rear axle are respectively fixedly connected to a rear supporting arm extending backward, and the rear supporting arm is connected to a mop rack. The end of the rear axle is fixedly connected to a rear connecting arm extending forward, and the end of the front axle is fixedly connected to a front connecting arm extending backward. The front connecting arm and the rear connecting arm are hinged together so as to slide relative to each other.

[0006] The lifting drive mechanism includes a lifting rope, a lowering rope and a driving arm fixedly connected to one end of the front axle; the sewage tank is rotatably connected to an upper pulley and a lower pulley located above and below the driving arm respectively on the side wall corresponding to the driving arm, and the rotation of the upper pulley is driven by the lifting power device; two upper ring grooves are provided on the outer circumference of the upper pulley, and a lower ring groove is provided on the outer circumference of the lower pulley; one end of the lifting rope is fixed to the groove wall of an upper ring groove, and the other end is connected to the driving arm through a lifting spring. One end is fixed to the groove wall of another upper ring groove, and the other end is connected to the driving arm after passing through the lower pulley; when the upper pulley rotates forward, the upper pulley is used to wrap the rising pulley to shorten the rising pulley, so as to pull the driving arm upward, so that the scrubbing roller is close to the ground, and the rising pull rope is in the process of shortening while the descending pull rope is in the process of extending; when the upper pulley is reversed, the upper pulley is used to wrap the descending pull rope to shorten the descending pull rope, so as to pull the driving arm downward, so that the scrubbing roller is away from the ground, and the descending pull rope is in the process of shortening while the rising pull rope is in the process of extending.

[0007] A tensioning device is provided below the upper pulley, which can keep the lowering pulley in a taut state when the lowering pulley is in the elongation process to prevent the lowering pulley from escaping from the annular groove of the lower pulley.

[0008] The tensioning device includes two spaced support plates fixed to the side walls of the sewage tank and a sliding rod slidably connected to the two support plates, one end of the sliding rod passes through one plate and the other end passes through the other plate, one end of the sliding rod is rotatably connected to a tensioning wheel that rests on the descending rope, the sliding rod is provided with a tensioning spring located between the two support plates, the sliding rod is provided with a spring blocker, one end of the tensioning spring rests on the spring blocker and the other end rests on the support plate away from the tensioning wheel.

[0009] The wall of the sewage tank is rotatably connected to a wheel axle, the pulley is fixed on the wheel axle, and the lifting power device is a lifting motor installed on the frame or the wall of the sewage tank, and the lifting motor is connected to the wheel axle through a sprocket chain transmission chain.

[0010] A slidable and non-rotatable pressure roller seat is provided on each side wall of the sewage tank, and both ends of the pressure roller are rotatably connected to the two pressure roller seats; the bottom of the frame is provided with a rotatable central shaft with two ends extending out of the two sides of the frame respectively, and a pulling arm is fixedly connected to the protruding end of the central shaft, and a pressure arm is hinged on each side wall of the sewage tank, and the upper end of the pressure arm is in contact with the pressure roller seat, and the lower end is connected to the pulling arm through a tension spring; a handle is fixed on one protruding end of the central shaft, and a plurality of stop pins for positioning the handle are provided on the side wall of the sewage tank. By changing the position of the handle and making the handle rest on the stop pins in different positions, the squeezing force of the pressure roller on the scrubbing belt can be adjusted.

[0011] The front end portion of the front supporting arm is provided with a scrubbing roller slide, and the scrubbing roller slide is inserted in the scrubbing roller seat which can slide along the scrubbing roller slide but cannot rotate, and the scrubbing roller seat at both ends of the scrubbing roller is rotatably connected to the scrubbing roller seat, and the front supporting arm is provided with a correcting device to prevent the scrubbing belt from running away; the correcting device comprises a nut seat fixed on the front supporting arm and a spring sleeve, and the nut seat is rotatably connected to the adjusting nut, and the scrubbing roller seat is fixedly connected to a spring support shaft extending into the spring sleeve, and the spring support shaft is sleeved with a correcting spring with a length greater than the spring support shaft, and the adjusting nut is screwed on a screw rod extending into the spring sleeve, one end of the correcting spring is fixed to the scrubbing roller seat, and the other end extends into the spring sleeve and is fixed to the inserted end of the screw rod; rotating the adjusting nut can drive the screw rod to move axially, and the axially moving screw rod can pull the scrubbing roller seat closer or farther through the correcting spring so that the scrubbing roller is arranged parallel to the power roller.

[0012] The clean water tank is a fully enclosed water tank arranged on the top of the sewage tank. The clean water tank is hinged on the frame or the wall of the sewage tank to realize the function of the tank cover of the sewage tank. The clean water tank is connected to the water spray pipe through a water supply pipeline provided with a water pump or a water pump and a valve.

[0013] The scrubbing power device is a scrubbing motor installed on a frame or a wall of a sewage tank. The scrubbing motor is connected to a power roller and a roller brush through a sprocket chain transmission chain.

[0014] There are two front traveling wheels and one rear traveling wheel, the front traveling wheel is mounted on the front bottom of the frame, the middle part of the rear of the frame is rotatably connected to the steering shaft, the rear traveling wheel is mounted on the rear traveling wheel shaft rotatably connected to the lower end of the steering shaft, the traveling drive device is a traveling motor, the traveling motor is power-connected to the rear traveling wheel shaft, and the upper end of the steering shaft is equipped with a steering gear; the steering handle includes an upper handle section and a lower handle section rotatably connected to the frame or the box wall of the sewage tank, the upper handle section and the lower handle section are connected by a universal joint, and the lower handle section is equipped with a driving gear meshing with the steering gear.

[0015] The present invention is used as follows: before use, the clean water tank is filled with clean water, and the water collection tank can also be filled with clean water at the same time. The lifting drive mechanism is activated to drive the scrubbing roller down until the scrubbing roller drives the scrubbing belt to contact the ground. The travel power unit and the scrubbing power unit are then activated. The travel power unit drives the floor scrubbing machine to move, while the scrubbing power unit drives the scrubbing belt to rotate, thereby scrubbing the ground. During the rotation of the scrubbing belt, the belt section with stains and dust is first soaked in water from the water collection tank, then scrubbed by the roller brush and rinsed with spray water (from the water spray pipe), leaving the belt section cleaner and then participating in the floor scrubbing. The water content of the scrubbing belt can be adjusted by adjusting the pressure of the pressure roller. Increasing the pressure of the pressure roller reduces the water content of the scrubbing belt, while decreasing the pressure increases the water content. The cleaning staff changes the direction of travel of the floor scrubbing machine by manipulating the steering handle. The scrubbing belt rotates in a generally counterclockwise direction. After the floor scrubbing process is complete, the scrubbing power unit is stopped, and the lifting drive mechanism is activated to drive the scrubbing roller up until the scrubbing roller drives the scrubbing belt off the ground. At the same time, the water spray pipe is stopped, and the floor scrubber is moved to the storage location. The water in the sump can now be poured into the sewage tank, and the dirty water in the sewage tank can be drained. During the scrubbing process, if the clean water tank is low on water, it can be refilled. If the sewage tank water level exceeds the set water level, it can be drained. After the refilling and / or draining are completed, the operation can be continued.

[0016] It is not difficult to see from the above description of the use of the present invention that the present invention has the advantage of cleaning the scrubbing belt while using the scrubbing belt to scrub the floor, which can bring about a good bottom surface scrubbing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0018] Figure 1 It is a schematic cross-sectional view of the present invention;

[0019] Figure 2 It is a left side view of the present invention;

[0020] Figure 3 It is a right side view of the present invention;

[0021] Figure 4 yes Figure 2 and Figure 3 The enlarged view of part A is the structural diagram of the correction device. DETAILED DESCRIPTION

[0022] Reference Figure 1 、 Figure 2 and Figure 3The floor scrubbing machine provided by the present invention includes a frame 1, on which are mounted front and rear wheels 2 and a steering handle 4 for steering the floor scrubbing machine. The frame 1 includes two front wheels 2 and one rear wheel 3. The front wheels 2 are mounted at the front bottom of the frame. A steering shaft 5 is rotatably connected to the middle portion of the rear of the frame. The lower end of the steering shaft 5 is fixedly connected to a rear wheel bracket 61. The rear wheel bracket 61 is rotatably connected to a rear wheel axle 6. The rear wheel 3 is fixedly mounted to the rear wheel axle 6. The frame travels by driving the rear wheels. The travel drive device is a travel motor (omitted in the figure) mounted on the steering shaft 5 or the rear wheel bracket 61. The travel motor is power-connected to the rear wheel axle 6 via a chain sprocket. The travel motor drives the rear wheels 3 to rotate, thereby achieving travel of the floor scrubbing machine. A steering gear 7 is installed at the upper end of the steering shaft 5; the steering handle includes an upper handle section 62 and a lower handle section 63 which are rotatably connected to the frame or the wall of the sewage tank, the upper handle section and the lower handle section are connected by a universal joint 8, and the lower handle section is equipped with a driving gear 64 which is engaged with the steering gear 7; rotating the upper handle section can rotate the steering shaft 5 through the universal joint 8, the lower handle section 63 and the engaged driving gear 64 and the steering gear 7, thereby driving the rear travel wheel 3 to change the direction of travel, thereby realizing the change of the direction of travel of the floor scrubber. Of course, the travel of the frame can also be realized by driving the front travel wheel by the travel drive device. The above provisions on the front and rear directions are as follows: with the direction of travel of the floor scrubber as the front, the steering handle 4 is located at the rear of the frame; when the operator holds the steering handle 4 and faces forward, the left side of the operator is the left side of the floor scrubber, and the right side of the operator is the right side of the floor scrubber, Figure 2 This is the left side view of the floor scrubber and Figure 3 This is the right side view of the floor scrubber, which is named according to the meanings of left and right above.

[0023] Reference Figure 1 、 Figure 2 and Figure 3A sewage tank 9 is mounted on the frame 1. A rotatable front axle 10 is mounted on the front bottom of the frame 1, with its two ends extending outward from the left and right sides of the frame. A forward-extending front support arm 11 is fixedly connected to each end of the front axle. A scrubbing roller 13 is mounted on the outer front of the frame, with its two ends rotatably connected to the front support arm. A power roller 14 is mounted on the front top of the sewage tank 9. A support roller 15 is mounted below the power roller 14. A cleaning roller 16 is mounted below the rear of the support roller 15. The power roller 14, support roller 15, and cleaning roller 16 are rotatably connected to the left and right side walls of the sewage tank 9. A scrubbing belt 17 is wrapped around the scrubbing roller 13, power roller 14, cleaning roller 16, and support roller 15. The scrubbing belt 17 can be an annular sponge belt or a sponge composited on the surface of an annular rubber belt. The scrubbing rollers 13, power roller 14, and cleaning roller 16 are in contact with the inner surface of the scrubbing belt 17, while the support roller 15 is in contact with the outer surface of the scrubbing belt 17. A water collection trough 18 is provided below the cleaning roller 16, located within the sewage tank 9. The cleaning roller 16 is partially located within the water collection trough 18, and a roller brush 19 is provided above and behind the cleaning roller 16 to scrub the scrubbing belt 17. The rotation of the power roller 14 and roller brush 19 is driven by a scrubbing power unit. The scrubbing power unit is a scrubbing motor 20 mounted on a frame or the wall of the sewage tank (the scrubbing motor 20 shown in the figure is mounted on the frame). The scrubbing motor 20 is connected to the power roller and roller brush via a scrubbing transmission chain 56 consisting of a sprocket chain. A clean water tank 21 is provided at the top of the sewage tank 9. The clean water tank is a fully enclosed water tank, hinged to the frame or the wall of the sewage tank to serve as the tank cover. A fully enclosed water tank means that the water tank has walls on all four sides, which are provided with a water inlet and a water outlet, and the water inlet is provided with an openable cover. A water spray pipe 22 is provided above the cleaning roller 16 and is connected to the clean water tank through a water supply pipeline (omitted in the figure) provided with a water pump or a water pump and a valve. The water spray pipe 22 can spray water toward the scrubbing belt, and the water collection tank 18 is used to receive the spray water flowing down from the scrubbing belt.

[0024] Reference Figure 1 、 Figure 2 and Figure 3Behind the power roller is a pressure roller 23 that can cooperate with the power roller 14 to squeeze the scrubbing belt; on the left and right side walls of the sewage tank 9, there is a slidable but non-rotatable pressure roller seat 24, that is, on the left and right side walls of the sewage tank 9, there is a pressure roller slide 65, and the pressure roller seat 24 is slidably inserted into the pressure roller slide 65, so that the pressure roller seat 24 can slide but cannot rotate; the two ends of the pressure roller 23 are rotatably connected to the two pressure roller seats 24. The bottom of the frame is equipped with a central shaft 25 with two ends extending out of the left and right sides of the frame and capable of rotation. The protruding end of the central shaft 25 is fixedly connected to a pulling arm 26. On the left and right side walls of the sewage tank, a pressure arm 27 is hingedly connected. The upper end of the pressure arm 27 contacts the pressure roller seat 24, and the lower end is connected to the pulling arm 26 through a tension spring 28. A handle 29 is fixedly connected to one protruding end of the central shaft 25. Pulling the handle 29 drives the central axis 25 to rotate, and the rotating central axis 25 pulls the lower end of the pressure arm 27 through the pulling arm 26 thereon and the tension spring 28 connected to the pulling arm 26. Since the pressure arm 27 is hinged on the side wall of the sewage tank, the upper end of the pressure arm 27 can push the pressure roller seat 24 to slide toward the power roller 14, and the pressure roller 23 on the pressure roller seat 24 can squeeze the scrubbing belt 17. The water content of the scrubbing belt 17 can be changed by changing the degree of squeezing the scrubbing belt 17. The adjustment of the squeezing force of the scrubbing belt 17 is achieved by a plurality of stop pins 30 which are arranged on the side wall of the sewage tank or on the frame and can position the handle 29. The squeezing force of the pressure roller on the scrubbing belt 17 can be adjusted by changing the position of the handle 29 and making the handle 29 rest on the stop pins 30 at different positions; three stop pins 30 are shown in the figure. When the handle rests on the upper stop pin, the squeezing force is the smallest, when it rests on the middle stop pin, the squeezing force is slightly larger, and when it rests on the lower stop pin, the squeezing force is the largest.

[0025] Reference Figure 1 、 Figure 2 and Figure 3 The rear bottom of the frame 1 is equipped with a rear axle 31 with two ends extending out of the left and right sides of the frame and capable of rotation. The two ends of the rear axle 31 are fixedly connected to rear support arms 32 extending backward. The rear support arms 32 are connected to a mop rack 33, which is used to hold a mop 55. The end of the rear axle 31 is fixedly connected to a rear connecting arm 34 extending forward. The end of the front axle 10 is fixedly connected to a front connecting arm 35 extending backward. The front connecting arm 35 and the rear connecting arm 34 are hinged together so as to slide relative to each other, that is, a pin is fixedly connected to the front connecting arm 35, and a long hole is provided on the rear connecting arm 34. The pin is installed in the long hole. The pin and the long hole cooperate to realize that the front connecting arm 35 and the rear connecting arm 34 can be hinged together so as to slide relative to each other. In order to lower the scrubbing roller to make the scrubbing belt 17 contact the ground when scrubbing the ground, and to raise the scrubbing roller to make the scrubbing belt 17 leave the ground when not scrubbing the ground, a lifting drive mechanism is provided. Reference Figure 2The lifting drive mechanism includes an ascending rope 36, a descending rope 37, and a driving arm 38 fixed to one end of the front axle. The sewage tank 9 is rotatably connected to an upper pulley 39 and a lower pulley 40 located above and below the driving arm 38, respectively, on the side wall corresponding to the driving arm. A wheel axle 41 is rotatably connected to the wall of the sewage tank 9. The upper pulley 39 is fixed to the wheel axle 41. The rotation of the upper pulley 39 is driven by a lifting power device, which is a lifting motor 42 mounted on the frame or the wall of the sewage tank. The lifting motor 42 is connected to the wheel axle 41 through a lifting transmission chain 57 composed of a sprocket chain. The upper pulley 39 has two upper annular grooves on its outer circumference, and the lower pulley has a lower annular groove on its outer circumference. One end of the raising rope 36 is fixed to the wall of one upper annular groove, and the other end is connected to the driving arm 38 via a lifting spring 43. One end of the lowering rope 37 is fixed to the wall of the other upper annular groove, and the other end is connected to the driving arm 38 after passing through the lower pulley 40. When the upper pulley 39 rotates forward, the raising rope 36 is wound around the upper pulley 39, which then pulls the driving arm 38 upward. The driving arm 38 drives the front axle 10 to rotate and the front support arm 11 to tilt downward, thereby bringing the scrubbing roller closer to the ground. At the same time, the front axle 10 drives the front connecting arm 35 upward, which drives the rear connecting arm 34 upward, which drives the rear axle 31 to rotate, and the rear axle 31 drives the rear support arm 32 downward, thereby bringing the mop rack 33 closer to the ground. As the raising rope is wound and shortened, the lowering rope is stretched. When the pulley reverses, the lowering rope 37 winds around the pulley, pulling the driving arm 38 downward. The driving arm 38 drives the front axle 10 to rotate in the opposite direction (relative to the rotation direction of the front axle 10 when the front support arm 11 is tilted downward) and drives the front support arm 11 upward, thereby lifting the scrubbing roller off the ground. Simultaneously, the front axle 10 drives the front connecting arm 35 downward, the front connecting arm 35 drives the rear connecting arm 34 downward, the connecting arm 34 drives the rear axle 31 in the opposite direction (relative to the rotation direction of the rear axle 31 when the support arm 32 is tilted downward), and the rear axle 31 drives the rear support arm 32 upward, thereby lifting the mop rack 33 off the ground. While the lowering rope 37 is winding and shortening, the raising rope is in the process of stretching. The lengths of the raising rope 36 and the lowering rope 37 are fixed. The above-mentioned stretching and shortening refer to the changes in the lengths of the raising rope 36 and the lowering rope 37 between the pulley 39 and the driving arm 38.

[0026] Reference Figure 2A tensioning device is provided below the upper pulley 39. When the lowering rope 37 is in the process of being extended, the lowering rope is kept in a taut state to prevent the lowering rope from falling out of the annular groove of the lower pulley 40. The tensioning device comprises two spaced support plates 66 fixed to the side wall of the sewage tank and a slide bar 44 slidably connected to the two support plates. One end of the slide bar 44 passes through one support plate and the other end passes through the other support plate. A tensioning wheel 45 is rotatably connected to one of the protruding ends of the slide bar, which abuts against the lowering rope 37. A tensioning spring 46 is mounted on the slide bar 44 and is located between the two support plates. A spring stopper 47 is provided on the slide bar. The spring stopper 47 can be a protrusion provided on the slide bar or a stop pin connected to the slide bar. One end of the tensioning spring 46 abuts against the spring stopper 47 and the other end abuts against the support plate 66 away from the tensioning wheel 45.

[0027] Reference Figure 2 、 Figure 3 and Figure 4The rollers connected to the wall of the sewage tank 9 are easily arranged in parallel from a processing and assembly perspective. However, the scrubbing roller 13 is connected via the front support arm 11, and the front support arm 11 must be able to flip up and down, which increases the difficulty of arranging the scrubbing roller 13 and the power roller 14 in parallel. The parallelism of the scrubbing roller 13 and the power roller 14 cannot be guaranteed, and the scrubbing belt 17 will deviate during rotation. In order to adjust the scrubbing roller 13 to be parallel to the power roller 14, the following further improvements have been made: the front end of the front support arm 11 is provided with a scrubbing roller chute 12. The scrubbing roller chute 12 contains a scrubbing roller seat 48 that can slide along the scrubbing roller chute 12 but cannot rotate. The two ends of the scrubbing roller 13 are rotatably connected to the scrubbing roller seat 48. The front support arm 11 is provided with a correction device to prevent the scrubbing belt from running off; the correction device includes a nut seat 49 and a spring sleeve 50 fixed to the front support arm, an adjusting nut 51 is rotatably connected to the nut seat 49, a spring support shaft 52 extending into the spring sleeve 50 is fixed to the scrubbing roller seat 48, a correction spring 53 is sleeved on the spring support shaft 52, a screw rod 54 extending into the spring sleeve 50 is screwed on the adjusting nut 51, and one end of the correction spring 53 is connected to the spring sleeve 50. The scrubbing roller seat 48 is fixedly connected, with its other end extending into a spring housing 50 and being fixedly connected to the protruding end of a screw rod 54. The length of the correcting spring 53 is greater than the length of the spring support shaft 52, so that the ends of the spring support shaft 52 and the ends of the screw rod 54 are spaced a certain distance apart within the spring housing 50. Rotating the adjusting nut 51 drives the screw rod 54 to move axially. The axially moving screw rod 54, via the correcting spring 53, pulls the scrubbing roller seat 48 toward or away from the power roller 14, thereby aligning the scrubbing roller 13 with the power roller 14. The advantage of arranging the ends of the spring support shaft 52 and the screw rod 54 at a certain distance is that during floor scrubbing, the correcting spring 53 can cushion the scrubbing roller 13 from external forces (such as impacts caused by uneven floors or debris), thereby preventing damage to the scrubbing belt. When the scrubbing roller 13 is tilted and driven away from the floor on the front support arm 11, the correcting spring 53 provides space for the scrubbing roller 13 to retract, thereby preventing the scrubbing roller 13 from excessively pulling on the scrubbing belt and causing damage to the scrubbing belt.

[0028] The lifting drive mechanism and the tensioning device of this embodiment are arranged on the left side of the floor scrubbing machine. Figure 2 As shown; the scrubbing power unit, handle and stop pin are located on the right side of the floor scrubber, as shown in Figure 3 As shown; the lifting drive mechanism and the tensioning device can also be arranged on the right side of the floor scrubber, and the scrubbing power device, handle and stop pin can be arranged on the left side of the floor scrubber, and the use effect is the same; as for the setting position of the above-mentioned devices and components, those skilled in the art can make equivalent changes according to design habits and user requirements under the technical inspiration of the present invention, but it does not affect the protection scope of the present invention.

[0029] The method of using the present invention is as follows: before use, fill the clean water tank with clean water, and at the same time fill the water collection tank with clean water, start the lifting drive mechanism to drive the scrubbing roller down until the scrubbing roller drives the scrubbing belt to contact the ground, and at the same time, the mop rack also descends to make the mop (not shown in the figure) on it contact the ground. Figure 2 and Figure 3 As shown; then start the travel power device and the scrubbing power device. The travel power device drives the floor scrubber to move while the scrubbing power device drives the scrubbing belt to rotate, thereby scrubbing the floor. During the rotation of the scrubbing belt, the belt section with stains and dust attached is first soaked in water in the sump, and then rinsed by the roller brush and the water sprayed from the water pipe to become a relatively clean belt section and then participate in the floor scrubbing. The water sprayed from the water pipe rinses the scrubbing belt and then flows into the sump. When the sump is full, it overflows and flows into the sewage tank. The continuous flow of the rinse water into the sump can keep the water in the sump relatively clean, and achieve a better cleaning effect. The water content of the scrubbing belt can be adjusted by adjusting the pressure of the pressure roller. Increasing the pressure of the pressure roller will reduce the water content of the scrubbing belt, and vice versa. The cleaning staff can control the direction of travel of the floor scrubber by supporting the steering handle. The rotation direction of the scrubbing belt is usually counterclockwise. After the floor scrubbing process is complete, the scrubbing power unit is stopped, and the lifting drive mechanism is activated to raise the scrubbing roller and mop rack until the scrubbing belt and the mop on the mop rack are clear of the ground. The water spray pipe is stopped, and the floor scrubber is moved to a storage location. The water in the sump can now be poured into the sewage tank, and the turbid water in the sewage tank can be drained. During the scrubbing process, if the clean water tank is low on water, it can be refilled. If the sewage tank water level exceeds the set level, it can be drained. After refilling and / or draining, the scrubbing process can continue.

Claims

1. A floor scrubber, comprising a frame, on which are mounted front and rear wheels, and a steering handle for steering the floor scrubber; characterized in that: The frame is provided with a sewage tank and a clean water tank; the front bottom of the frame is provided with a front shaft with two ends extending out of both sides of the frame and capable of rotation, and the two ends of the front shaft are respectively fixed with a forward extending front support arm, and a scrubbing roller is rotatably connected to the front support arm; a power roller is provided on the upper part of the sewage tank, a support roller is provided below the power roller, and a cleaning roller is provided below the rear of the support roller; a scrubbing belt is wrapped around the scrubbing roller, the power roller, the cleaning roller and the support roller, the scrubbing roller, the power roller and the cleaning roller are in contact with the inner surface of the scrubbing belt, and the support roller is in contact with the outer surface of the scrubbing belt; the cleaning roller The roller part is located in the water collecting tank, and a roller brush is provided on the upper rear of the cleaning roller to brush the scrubbing belt; a water spray pipe connected to the clean water tank and capable of spraying water to the scrubbing belt is provided above the cleaning roller, and a pressure roller is provided behind the power roller to cooperate with the power roller to squeeze the scrubbing belt; the floor scrubbing machine also includes a lifting drive mechanism that drives the front axle to rotate to lift or lower the scrubbing roller; a scrubbing roller slide is provided at the front end of the front support arm, and a scrubbing roller seat that can slide along the scrubbing roller slide but cannot rotate is inserted in the scrubbing roller slide, and the scrubbing roller The two ends are rotatably connected to the scrubbing roller seat respectively, and the front support arm is provided with a correcting device that can prevent the scrubbing belt from deviating; the correcting device includes a nut seat and a spring sleeve fixedly connected to the front support arm, and an adjusting nut is rotatably connected to the nut seat, and a spring support shaft extending into the spring sleeve is fixedly connected to the scrubbing roller seat, and a correcting spring with a length greater than the spring support shaft is sleeved on the spring support shaft, and a screw rod extending into the spring sleeve is screwed on the adjusting nut, and one end of the correcting spring is fixed to the scrubbing roller seat and the other end extends The cam is inserted into the spring sleeve and is fixedly connected to the extending end of the screw rod; rotating the adjusting nut can drive the screw rod to move axially, and the axially moving screw rod can pull the scrubbing roller seat closer or push it away through the correction spring so that the scrubbing roller and the power roller are arranged parallel to each other; a sliding and non-rotatable pressure roller seat is provided on each side wall of the sewage tank; a rotatable central shaft is provided at the bottom of the frame, and a pulling arm is fixed to the extending end of the central shaft, and a pressure arm is hinged on each side wall of the sewage tank, the upper end of the pressure arm is in contact with the pressure roller seat, and the lower end is connected to the pulling arm through a tension spring.

2. The floor scrubbing machine according to claim 1, characterized in that: The rear bottom of the frame is equipped with a rear axle with two ends extending out from both sides of the frame and capable of rotation. The two ends of the rear axle are respectively fixedly connected to a rear supporting arm extending backward, and the rear supporting arm is connected to a mop rack. The end of the rear axle is fixedly connected to a rear connecting arm extending forward, and the end of the front axle is fixedly connected to a front connecting arm extending backward. The front connecting arm and the rear connecting arm are hinged together so as to slide relative to each other.

3. The floor scrubbing machine according to claim 1 or 2, characterized in that: The lifting drive mechanism includes a lifting rope, a lowering rope and a driving arm fixedly connected to one end of the front axle; the sewage tank is rotatably connected to an upper pulley and a lower pulley located above and below the driving arm respectively on the side wall corresponding to the driving arm, and the rotation of the upper pulley is driven by the lifting power device; two upper ring grooves are provided on the outer circumference of the upper pulley, and a lower ring groove is provided on the outer circumference of the lower pulley; one end of the lifting rope is fixed to the groove wall of an upper ring groove, and the other end is connected to the driving arm through a lifting spring. One end is fixed to the groove wall of another upper ring groove, and the other end is connected to the driving arm after passing through the lower pulley; when the upper pulley rotates forward, the upper pulley is used to wrap the rising pulley to shorten the rising pulley, so as to pull the driving arm upward, so that the scrubbing roller is close to the ground, and the rising pull rope is in the process of shortening while the descending pull rope is in the process of extending; when the upper pulley is reversed, the upper pulley is used to wrap the descending pull rope to shorten the descending pull rope, so as to pull the driving arm downward, so that the scrubbing roller is away from the ground, and the descending pull rope is in the process of shortening while the rising pull rope is in the process of extending.

4. The floor scrubbing machine according to claim 3, characterized in that: A tensioning device is provided below the upper pulley, which can keep the lowering pulley in a taut state when the lowering pulley is in the elongation process to prevent the lowering pulley from escaping from the annular groove of the lower pulley.

5. The floor scrubbing machine according to claim 4, characterized in that: The tensioning device includes two spaced support plates fixed to the side walls of the sewage tank and a sliding rod slidably connected to the two support plates, one end of the sliding rod passes through one plate and the other end passes through the other plate, one end of the sliding rod is rotatably connected to a tensioning wheel that rests on the descending rope, the sliding rod is provided with a tensioning spring located between the two support plates, the sliding rod is provided with a spring blocker, one end of the tensioning spring rests on the spring blocker and the other end rests on the support plate away from the tensioning wheel.

6. The floor scrubbing machine according to claim 3, characterized in that: The wall of the sewage tank is rotatably connected to a wheel axle, the pulley is fixed on the wheel axle, and the lifting power device is a lifting motor installed on the frame or the wall of the sewage tank, and the lifting motor is connected to the wheel axle through a sprocket chain transmission chain.

7. The floor scrubbing machine according to claim 1, characterized in that: A handle is fixed to an extended end of the central axis, and a plurality of stop pins for positioning the handle are provided on the side wall of the sewage tank. By changing the position of the handle and making the handle rest on the stop pins at different positions, the squeezing force of the pressure roller on the scrubbing belt can be adjusted.

8. The floor scrubbing machine according to claim 1, characterized in that: The clean water tank is a fully enclosed water tank arranged on the top of the sewage tank. The clean water tank is hinged on the frame or the wall of the sewage tank to realize the function of the tank cover of the sewage tank. The clean water tank is connected to the water spray pipe through a water supply pipeline provided with a water pump or a water pump and a valve.

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