Self-cleaning step ladder

Abstract

The present invention relates to the technical field of step ladders, and specifically discloses a self-cleaning step ladder. The self-cleaning step ladder comprises a frame, on which a roller chain, a step and a driving member are installed, and a first groove and a second groove are provided on the frame, the driving member drives the roller chain to slide along the first groove, the step is rotatably connected with the roller chain through a first mounting shaft, and a second mounting shaft is installed on the step, a second roller is installed on the second mounting shaft, the second roller slides along the second groove, and an opening for cutting off the second groove is also provided on the frame; the self-cleaning step ladder is provided with an opening on the bracket, and racks are provided at the upper and lower parts of the opening, and the step is flipped by the restriction of the rack on the gear, so that the arc surface of the step corresponds to the cleaning component, so that the cleaning component can fully clean the tread surface and the arc surface of the step; by providing a pre-cleaning roller, a cleaning mechanism and a water wiping mechanism, the step can be wiped after cleaning.

Description

Technical Field

[0001] The invention belongs to the technical field of step ladders, and in particular relates to a self-cleaning step ladder. Background Art

[0002] Elevators are divided into step elevators and elevators according to different usage environments. In rainy and snowy weather, elevators are easily contaminated by mud or rainwater stuck on the soles of users, affecting the cleanliness of the room and increasing the difficulty of cleaning for cleaning staff. Due to its strip structure, when the step ladder is stuck with mud or rainwater, the mud will fall into the grooves on the steps. Manual cleaning is inefficient and will affect pedestrians' walking. Therefore, a self-cleaning step ladder is proposed. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a self-cleaning step ladder.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0005] A self-cleaning step ladder comprises a frame, a roller chain, a step and a driving member are installed on the frame, and a first groove and a second groove are provided on the frame, the driving member drives the roller chain to slide along the first groove, the step is rotatably connected with the roller chain through a first mounting shaft, and a second mounting shaft is installed on the step, a second roller is installed on the second mounting shaft, the second roller slides along the second groove, an opening that cuts off the second groove is also provided on the frame, a flip assembly and a reset assembly are installed at a position corresponding to the opening of the first groove, two sets of cleaning assemblies are installed at the lower part of the frame, the step comprises a tread surface, an arc surface and an inclined surface, and the cleaning assembly comprises a tread surface along the roller The cleaning liquid nozzle, pre-cleaning roller, clean water nozzle, cleaning mechanism and water wiping mechanism are arranged in sequence in the moving direction of the wheel chain. One group of cleaning components is installed in the area with the tread surface facing downward, and the other group of cleaning components is installed in the opening setting position. When the roller chain drives the step to move to the lower end of the opening, the flipping component drives the arc surface of the step to flip to face the cleaning component. When the roller chain drives the step to move to the upper end of the opening, the reset component drives the step to flip to face the tread surface and the cleaning component. Two groups of shells corresponding to the cleaning components are installed at the lower part of the frame, and water tanks are installed on the inner sides of the shells. The cleaning components are installed on the upper part of the water tanks.

[0006] As a further optimization scheme of the present invention, the roller chain includes a plurality of first rollers, which are connected in sequence by connecting rods, the first mounting shafts are installed on the roller chain at equal intervals, and the first mounting shafts are rotatably connected to the corresponding first rollers, the length of the first mounting shaft is greater than the length of the second mounting shaft, and the depth of the first groove is greater than the depth of the second groove.

[0007] As a further optimization scheme of the present invention, the cleaning mechanism includes a supporting mechanism and two groups of washing brush rollers. When the supporting mechanism drives the washing brush rollers to flip one hundred and eighty degrees, the supporting mechanism squeezes the washing brush rollers away from the steps. The wiping mechanism includes a supporting mechanism and a wiping roller. When the supporting mechanism drives the wiping rollers to flip one hundred and eighty degrees, the supporting mechanism squeezes the wiping rollers away from the steps.

[0008] As a further optimization scheme of the present invention, the supporting mechanism includes two groups of brackets, both groups of brackets are fixedly connected to the inner wall of the water tank, and the inner shaft is rotatably installed on the bracket, the outer shaft is sleeved on the outside of the inner shaft, the outer shaft slides along the length direction of the inner shaft, and supporting elastic rods are installed on the outer wall of the outer shaft near both ends, the supporting elastic rods are symmetrically arranged about the central axis of the outer shaft, and the ends of the supporting elastic rods are fixedly connected to mounting seats, the washing roller includes a first connecting shaft, the two ends of the first connecting shaft are rotatably connected to the corresponding mounting seats, a driving component for driving the first connecting shaft to rotate is provided on the outer shaft, a first motor is installed on the side wall of a bracket, and the output shaft of the first motor is fixedly connected to the inner shaft.

[0009] As a further optimization scheme of the present invention, the driving assembly includes a bearing seat installed on the end of the outer shaft, a second motor is installed on the bearing seat, a belt pulley is installed on the output end of the second motor, the belt pulley is connected to the two groups of first connecting shafts through a transmission belt, and a tensioning elastic rod is also installed on the bearing seat, and the end of the tensioning elastic rod is rotatably connected to a tensioning wheel that supports the transmission belt.

[0010] As a further optimization scheme of the present invention, the washing roller also includes a plurality of bearing blocks sleeved on the first connecting shaft, the bearing blocks slide along the length of the first connecting shaft, a long groove for limiting the bearing blocks is opened on the first connecting shaft, the outer walls of the bearing blocks are connected with cleaning brushes, the areas between the bearing blocks on the first connecting shaft are sleeved with springs, a bearing block in the middle position of the first connecting shaft is fixedly connected to the outer wall of the first connecting shaft, pressure blocks are sleeved at both ends of the first connecting shaft, and limit strips are installed on the brackets, the lower part of the limit strips are inclined toward the middle part of the first connecting shaft, and when the outer shaft drives the supporting elastic rod to rotate one hundred and eighty degrees, the pressure block squeezes the cleaning brush toward the middle part of the first connecting shaft under the restriction of the limit strip.

[0011] As a further optimization scheme of the present invention, the water-wiping roller includes a second connecting shaft, which is rotatably connected to a mounting seat installed on another bracket, and both ends of the second connecting shaft are sleeved with pressure blocks, and a limit strip is also obliquely installed on the other bracket. When the water-wiping roller contacts the step, the pressure block contacts the side of the limit strip that is opened outward.

[0012] As a further optimization scheme of the present invention, the opening is opened at an angle, the flipping component is a first rack, the first rack is arranged at a position corresponding to the lower end of the opening of the first groove, the reset component is a second rack, the second rack is arranged at a position corresponding to the upper end of the opening of the first groove, and a gear is connected to the end of the first mounting shaft. When the roller chain drives the first mounting shaft to move to the position of the first rack, the first rack drives the gear to rotate until the arc surface of the step is opposite to the cleaning component. When the roller chain drives the first mounting shaft to move to the position of the second rack, the second rack drives the gear to drive the step to continue to rotate until the second roller on the step moves into the second groove.

[0013] As a further optimization scheme of the present invention, a third groove is opened on the inner wall of the water tank corresponding to the middle of the opening. When the first rack driving gear rotates to face the arc surface and the cleaning component, the second roller on the step moves into the third groove.

[0014] As a further optimization scheme of the present invention, the bearing block includes an outer ring and an inner ring, the thickness of the outer ring is equal to the width of the cleaning brush, the thickness of the inner ring is smaller than the thickness of the outer ring, and both ends of the spring are fixedly connected to the corresponding inner ring.

[0015] The beneficial effects of the present invention are as follows: an opening is arranged on the bracket, and racks are arranged at the upper and lower parts of the opening. The step is flipped by limiting the gears by the racks, so that the arc surface of the step corresponds to the cleaning component, which is convenient for the cleaning component to fully clean the tread surface and the arc surface of the step; by arranging a pre-cleaning roller, a cleaning mechanism and a water wiping mechanism, the tread surface and the arc surface of the step are fully cleaned multiple times, and the step can be wiped after cleaning is completed to ensure that the step can remain dry when it is rotated along the first groove to the use position; by controlling the rotation direction of the first motor, when the cleaning brush contacts the sharp part of the tread surface of the step, the rotation direction can be kept consistent with the moving direction of the step to prevent the cleaning brush from being damaged by the sharp part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 The present invention Figure 1 Schematic diagram of the internal structure;

[0018] Figure 3 The present invention Figure 2 Schematic diagram of the internal structure of the middle water storage tank;

[0019] Figure 4 This is a front view of the cleaning mechanism of the present invention in the cleaning state;

[0020] Figure 5 This is a side view of the cleaning mechanism of the present invention in the cleaning state;

[0021] Figure 6 is a front view of the water wiping mechanism of the present invention;

[0022] Figure 7 is a top view of the cleaning mechanism of the present invention;

[0023] Figure 8 The present invention Figure 7 A partial enlarged schematic diagram of

[0024] Fig. 9 The present invention Figure 8 A cross-sectional view of

[0025] Fig.10 is an enlarged schematic diagram of the step of the present invention;

[0026] Fig.11 is a positional relationship diagram of the openings of the first slot and the second slot of the present invention;

[0027] Fig.12 The present invention Figure 2 Enlarged view of point A in the middle;

[0028] Fig.13 The present invention Figure 3 Enlarged view of point B in the middle;

[0029] Fig.14 is a schematic diagram of the connection between the first installation shaft and the first roller of the present invention;

[0030] Fig.15 It is an enlarged schematic diagram of the limiting strip of the present invention.

[0031] In the figure: 1, frame; 11, shell; 12, water tank; 13, first slot; 14, second slot; 15, opening; 16, third slot; 17, first rack; 18, second rack; 2, roller chain; 21, connecting rod; 22, first roller; 3, step; 31, first mounting shaft; 32, gear; 33, second mounting shaft; 34, second roller; 4, supporting mechanism; 41, bracket; 42, inner shaft; 43, outer shaft; 44, first motor; 45, limit strip; 46, supporting elastic rod; 461, mounting seat; 47, bearing seat; 471, second motor; 472, transmission belt; 48, tensioning elastic rod; 49, pressing block; 5, cleaning mechanism; 6, wiping mechanism; 7, washing brush roller; 71, first connecting shaft; 72, bearing block; 73, spring; 74, cleaning brush; 8, wiping roller; 81, second connecting shaft. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0033] like Figures 1 to 15 As shown, in this embodiment, a self-cleaning step ladder is proposed, including a frame 1, a roller chain 2, a step 3 and a driving member are installed on the frame 1, and a first groove 13 and a second groove 14 are opened on the frame 1, the driving member drives the roller chain 2 to slide along the first groove 13, the step 3 is rotatably connected with the roller chain 2 through a first installation shaft 31, and a second installation shaft 33 is installed on the step 3, and a second roller 34 is installed on the second installation shaft 33, and the second roller 34 slides along the second groove 14, and an opening 15 that cuts off the second groove 14 is also opened on the frame 1, and a flip assembly and a reset assembly are installed at the position of the first groove 13 corresponding to the opening 15, and two sets of cleaning assemblies are installed at the lower part of the frame 1, and the step 3 includes a tread surface, an arc surface and inclined surface, the cleaning component includes a cleaning liquid nozzle, a pre-cleaning roller, a clean water nozzle, a cleaning mechanism 5 and a water wiping mechanism 6 which are arranged in sequence along the moving direction of the roller chain 2, one group of cleaning components is installed in the area with the tread surface facing downward, and the other group of cleaning components is installed at the setting position of the opening 15. When the roller chain 2 drives the step 3 to move to the lower end of the opening 15, the flipping component drives the arc surface of the step 3 to flip to face the cleaning component. When the roller chain 2 drives the step 3 to move to the upper end of the opening 15, the reset component drives the step 3 to flip to face the tread surface and face the cleaning component. Two groups of shells 11 corresponding to the cleaning components are installed at the lower part of the frame 1, and water tanks 12 are installed on the inner sides of the shells 11, and the cleaning components are installed on the upper part of the water tank 12.

[0034] It should be noted that the driving member includes a driving motor, a reducer and a sprocket. The driving motor is installed on the frame 1, and the output shaft of the driving motor is connected to the input shaft of the reducer. The output shaft of the reducer is connected to the sprocket, and the sprocket cooperates with the roller chain 2. The driving motor, the reducer and the sprocket all adopt the existing technology. In the specific implementation, a suitable model is adopted according to the actual situation.

[0035] A partition plate, a filter device and a delivery pump are provided in the water tank 12. The partition plate divides the water tank 12 into two parts. Two groups of the filter device and the delivery pump are provided and respectively installed in two separated areas of the water tank 12. The cleaning liquid nozzle is connected to the delivery pump provided in the cleaning liquid through a pipeline, and the clean water nozzle is connected to the delivery pump provided in the clean water through a pipeline. In the specific implementation, the water spraying direction of the clean water nozzle is directed toward the contact position between the washing roller 7 and the step 3 in the washing mechanism 5, and the washing is carried out while spraying water. The provided filter device can filter the contaminated cleaning liquid and clean water to facilitate the reuse of water resources;

[0036] The pre-cleaning roller includes a cleaning roller, which is rotatably connected to the inner wall of the water tank 12 through an elastic rod and a supporting seat 47. Another driving motor is arranged on the inner wall of the water tank 12, so that the output shaft of the other driving motor is transmission-connected to the cleaning roller. When cleaning the tread surface and the arc surface of the step 3, when the cleaning liquid is sprayed to the cleaning side, the cleaning roller cooperates with the cleaning liquid to perform the initial cleaning of the tread surface or the arc surface on the step 3.

[0037] Specifically, the roller chain 2 includes a plurality of first rollers 22, which are connected in sequence through a connecting rod 21, and first mounting shafts 31 are installed on the roller chain 2 at equal intervals, and the first mounting shafts 31 are rotatably connected to the corresponding first rollers 22, the length of the first mounting shaft 31 is greater than the length of the second mounting shaft 33, and the depth of the first groove 13 is greater than the depth of the second groove 14.

[0038] It should be noted that the first groove 13, the second groove 14 and the opening 15 are provided on the front and rear sides of the frame 1. During the operation of the step ladder, the two ends of the step 3 are restricted to maintain the stable operation of the step ladder. The roller chain 2 is connected at the head and tail and is arranged throughout the entire first groove 13, so that the sprocket can rotate to drive the roller chain 2 to slide along the first groove 13.

[0039] Specifically, the cleaning mechanism 5 includes a supporting mechanism 4 and two groups of washing brush rollers 7. When the supporting mechanism 4 drives the washing brush rollers 7 to flip one hundred and eighty degrees, the supporting mechanism 4 squeezes the washing brush rollers 7 away from the step 3. The wiping mechanism 6 includes a supporting mechanism 4 and a wiping roller 8. When the supporting mechanism 4 drives the wiping roller 8 to flip one hundred and eighty degrees, the supporting mechanism 4 squeezes the wiping roller 8 away from the step 3.

[0040] Specifically, the supporting mechanism 4 includes two groups of brackets 41, both groups of brackets 41 are fixedly connected to the inner wall of the water tank 12, and an inner shaft 42 is rotatably installed on the bracket 41, an outer shaft 43 is sleeved on the outside of the inner shaft 42, the outer shaft 43 slides along the length direction of the inner shaft 42, and supporting elastic rods 46 are installed on the outer wall of the outer shaft 43 near both ends, the supporting elastic rods 46 are symmetrically arranged about the central axis of the outer shaft 43, and the ends of the supporting elastic rods 46 are fixedly connected to mounting seats 461, the scrubbing roller 7 includes a first connecting shaft 71, both ends of the first connecting shaft 71 are rotatably connected to the corresponding mounting seats 461, a driving component for driving the first connecting shaft 71 to rotate is provided on the outer shaft 43, a first motor 44 is installed on the side wall of a bracket 41, and the output shaft of the first motor 44 is fixedly connected to the inner shaft 42.

[0041] It should be noted that the supporting elastic rod 46 can shrink when subjected to force, so that the scrubbing roller 7 can adapt to the curvature change of the arc surface of the step 3, and will not be damaged by the step 3, while keeping close contact with the arc surface of the step 3 to maintain the scrubbing effect. The supporting elastic rod 46 adopts the existing elastic rod, and there is no specific requirement for the model. The appropriate size can be selected according to the use environment.

[0042] Specifically, the driving assembly includes a bearing seat 47 installed on the end of the outer shaft 43, a second motor 471 is installed on the bearing seat 47, a belt pulley is installed on the output end of the second motor 471, and the belt pulley is connected to the two sets of first connecting shafts 71 through a transmission belt 472. A tensioning elastic rod 48 is also installed on the bearing seat 47, and the end of the tensioning elastic rod 48 is rotatably connected to a tensioning wheel that supports the transmission belt 472.

[0043] In order to enable the transmission belt 472 to stably drive the first connecting shaft 71 to rotate, in a specific implementation, the transmission belt 472 can be set as a toothed belt, and a toothed pulley can be installed in the area where the end of the first connecting shaft 71 cooperates with the toothed belt, and the belt pulley can be set as a toothed pulley, so that power can be stably transmitted to the first connecting shaft 71.

[0044] Specifically, the washing roller 7 also includes a plurality of bearing blocks 72 sleeved on the first connecting shaft 71, the bearing blocks 72 slide along the length of the first connecting shaft 71, a long groove for limiting the bearing blocks 72 is opened on the first connecting shaft 71, the outer walls of the bearing blocks 72 are connected with cleaning brushes 74, the areas between the bearing blocks 72 on the first connecting shaft 71 are sleeved with springs 73, a bearing block 72 in the middle position of the first connecting shaft 71 is fixedly connected to the outer wall of the first connecting shaft 71, pressure blocks 49 are sleeved at both ends of the first connecting shaft 71, and limit strips 45 are installed on the bracket 41, and the lower part of the limit strips 45 are inclined toward the middle part of the first connecting shaft 71. When the outer shaft 43 drives the supporting elastic rod 46 to rotate one hundred and eighty degrees, the pressure block 49 squeezes the cleaning brush 74 toward the middle part of the first connecting shaft 71 under the restriction of the limit strip 45.

[0045] It should be noted that, since the tread surface and the arc surface of the step 3 are evenly spaced with notches, in specific implementation, the cleaning brush 74 can be set corresponding to the notches, and the cleaning brush 74 can brush the bottom of the notches on the step 3, so that the step 3 is fully cleaned.

[0046] Specifically, the water-wiping roller 8 includes a second connecting shaft 81, which is rotatably connected to a mounting seat 461 installed on another bracket 41, and both ends of the second connecting shaft 81 are sleeved with a pressure block 49, and a limit strip 45 is also obliquely installed on the other bracket 41. When the water-wiping roller 8 contacts the step 3, the pressure block 49 contacts the side of the limit strip 45 that is opened outward.

[0047] Specifically, the opening 15 is opened at an angle, the flip component is a first rack 17, the first rack 17 is arranged at a position of the first groove 13 corresponding to the lower end of the opening 15, the reset component is a second rack 18, the second rack 18 is arranged at a position of the first groove 13 corresponding to the upper end of the opening 15, the end of the first mounting shaft 31 is connected to a gear 32, when the roller chain 2 drives the first mounting shaft 31 to move to the position of the first rack 17, the first rack 17 drives the gear 32 to rotate until the arc surface of the step 3 is opposite to the cleaning component, when the roller chain 2 drives the first mounting shaft 31 to move to the position of the second rack 18, the second rack 18 drives the gear 32 to drive the step 3 to continue to rotate until the second roller 34 on the step 3 moves to the second groove 14.

[0048] It should be noted that the opening 15 prevents the frame 1 and the second groove 14 from blocking the step 3 from rotating, and facilitates the adjustment of the angle between the tread surface and the arc surface through the first rack 17 and the second rack 18 .

[0049] Specifically, a third groove 16 is formed on the inner wall of the water tank 12 at a position corresponding to the middle of the opening 15 . When the first rack 17 drives the gear 32 to rotate to face the arc surface and the cleaning assembly, the second roller 34 on the step 3 moves into the third groove 16 .

[0050] Specifically, the bearing block 72 includes an outer ring and an inner ring. The thickness of the outer ring is equal to the width of the cleaning brush 74, and the thickness of the inner ring is less than the thickness of the outer ring. Both ends of the spring 73 are fixedly connected to the corresponding inner ring.

[0051] It should be noted that, in specific implementation, a PLC controller may be provided to uniformly control the electrical components of the two cleaning components, and programs may be set so that the two cleaning components can automatically clean the step ladder.

[0052] Working principle: When the step ladder is in use, the driving motor drives the sprocket to rotate through the reducer, and drives the roller chain 2 to move along the first groove 13 through the sprocket. The roller chain 2 drives the step 3 to move through the first mounting shaft 31, and cooperates with the restriction of the second groove 14 on the second roller 34, so that the step 3 can move along the first groove 13;

[0053] While the step ladder is running, the second motor 471 is started and rotated, and the second motor 471 drives two sets of symmetrically arranged first connecting shafts 71 to rotate through the transmission belt 472, and the first connecting shafts 71 drive the bearing block 72 to rotate, and the bearing block 72 drives the cleaning brush 74 to rotate;

[0054] When the roller chain 2 drives the step 3 to move to the first group of cleaning components, the cleaning liquid nozzle sprays cleaning liquid to the tread surface of the step 3. As the step 3 moves, the part of the step 3 with the cleaning liquid moves to the setting position of the first group of pre-cleaning rollers, and the driving motor drives the pre-cleaning rollers to rotate to pre-clean the tread surface of the step 3.

[0055] Then, the water nozzle sprays water to the pre-cleaned area on the step 3. Because the step 3 has a spike on one end of the tread surface close to the arc surface, the bristles of the cleaning brush 74 are protected to prevent the cleaning brush 74 from being damaged by the spike. The cleaning brush 74 rotates forwardly under the drive of the second motor 471, and the forward rotation direction of the cleaning brush 74 is consistent with the moving direction of the step 3 along the first groove 13.

[0056] After the cleaning brush 74 passes over the tread surface of the step 3, the second motor 471 drives the first connecting shaft 71 to rotate in the opposite direction through the transmission belt 472. During this process, the cleaning brush 74 cleans the notch of the tread surface until the next step 3 moves to a position close to the setting position of the cleaning mechanism 5. At this time, the second motor 471 drives the first connecting shaft 71 to rotate in the opposite direction again through the transmission belt 472 to avoid the spikes on the tread surface of the next step 3.

[0057] As the step 3 continues to move along the first groove 13 until it contacts the water-wiping roller 8, the second motor 471 corresponding to the water-wiping roller 8 drives the corresponding first connecting shaft 71 to rotate in the opposite direction through the transmission belt 472, and the first connecting shaft 71 drives the water-wiping roller 8 to rotate in the opposite direction to wipe off the water remaining on the tread surface of the step 3;

[0058] When the roller chain 2 drives the step 3 to move to the lower part of the opening 15, the gear 32 connected to the end of the first installation shaft 31 is restricted by the first rack 17 and rotates, and the gear 32 drives the step 3 to rotate through the first installation shaft 31. After the gear 32 is disengaged from the first rack 17, the step 3 flips to an arc surface corresponding to another set of cleaning components. At this time, the second roller 34 on the second installation shaft 33 rotates to the third groove 16;

[0059] As the roller chain 2 drives the step 3 to continue to move, the step 3 moves along the first groove 13 in the flipped state. During this process, the cleaning liquid nozzle in another cleaning assembly sprays cleaning liquid onto the arc surface of the step 3, and the pre-cleaning roller pre-cleans the arc surface of the step 3. After the pre-cleaning is completed, another clean water nozzle sprays clean water onto the arc surface of the step 3.

[0060] When the arc surface of the step 3 moves to face the cleaning mechanism 5 in another cleaning assembly, the second motor 471 in the other cleaning mechanism 5 drives the first connecting shaft 71 corresponding to the brush roller 7 to rotate forward, and the first connecting shaft 71 drives the cleaning brush 74 to rotate forward, while cleaning the arc surface of the step 3, avoiding the protruding parts of the edge of the arc surface of the step 3 to prevent the bristles of the cleaning brush 74 from being pulled and damaged;

[0061] After avoiding the protruding part of the edge of the arc surface of the step 3, the second motor 471 drives the first connecting shaft 71 to rotate in the opposite direction, and the first connecting shaft 71 drives the cleaning brush 74 to rotate in the opposite direction, so that the cleaning brush 74 and the step 3 move in opposite directions, thereby improving the cleaning effect of the step 3;

[0062] As the step 3 continues to move to the water wiping mechanism 6 in another cleaning assembly, the second motor 471 corresponding to the water wiping mechanism 6 drives the water wiping mechanism 6 to rotate in the opposite direction to wipe off the water on the arc surface of the step 3;

[0063] When the step 3 moves until the gear 32 contacts the second rack 18, the second rack 18 limits the gear 32 so that the gear 32 continues to rotate, and the gear 32 drives the step 3 to continue to rotate through the first mounting shaft 31. When the step 3 moves until the gear 32 disengages from the second rack 18, the step 3 drives the second mounting shaft 33 to rotate until the second roller 34 falls into the second groove 14. The step 3 moves along the first groove 13 driven by the roller chain 2, and the second groove 14 limits the position of the second roller 34 to keep the state of the step 3 unchanged.

[0064] When there is too much water on the scrubbing roller 7 or the wiping roller 8, the first motor 44 drives the inner shaft 42 to rotate, the inner shaft 42 drives the outer shaft 43 to rotate, and drives the supporting elastic rod 46 and the bearing seat 47 to rotate through the outer shaft 43, the supporting elastic rod 46 drives the first connecting shaft 71 to rotate through the mounting seat 461, and the second motor 471 arranged on the mounting seat 461 rotates synchronously with the mounting seat 461, and maintains a transmission connection with the first connecting shaft 71;

[0065] When the first connecting shaft 71 and the inner shaft 42 rotate, the pressing block 49 is restricted by the limiting strip 45 and moves along the first connecting shaft 71 toward the middle of the first connecting shaft 71;

[0066] The pressing block 49 squeezes the cleaning brush 74 or the water wiping roller 8. When the pressing block 49 squeezes the cleaning brush 74, the cleaning brush 74 drives the bearing block 72 to slide toward the middle of the first connecting shaft 71 along the direction in which the long groove is opened, and the bearing block 72 squeezes the spring 73 to deform. In this process, the pressing block 49 squeezes the cleaning brush 74 and squeezes out the water in the cleaning brush 74.

[0067] After the inner shaft 42 rotates 180 degrees, the pressing block 49 slides along the limiting strip 45 to the position where the limiting strip 45 is farthest from the step 3, and the pressing block 49 squeezes the cleaning brush 74 to a state of being closely attached to each other;

[0068] When the pressing block 49 squeezes the water-wiping roller 8, the water in the water-wiping roller 8 is squeezed out;

[0069] The first motor 44 drives the inner shaft 42 to continue rotating 180 degrees. As the pressing block 49 slides along the limit bar 45 to a position where the limit bar 45 is close to the step 3, during this process, the spring 73 pushes the bearing block 72 to slide along the first connecting shaft 71 toward both ends of the first connecting shaft 71, and each bearing block 72 slides on the first connecting shaft 71 to an initial position.

[0070] In specific implementation, a program can be set in the controller to enable the first motor 44 to regularly drive the inner shaft 42 to rotate 180 degrees, thereby reducing energy loss while ensuring the cleaning effect of the cleaning brush 74 and the wiping roller 8 on the tread surface or arc surface of the step 3.

[0071] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A self-cleaning step ladder, characterized in that: The invention comprises a frame (1), a roller chain (2), a step (3) and a driving member are installed on the frame (1), and a first groove (13) and a second groove (14) are provided on the frame (1), the driving member drives the roller chain (2) to slide along the first groove (13), the step (3) is rotatably connected with the roller chain (2) through a first installation shaft (31), and a second installation shaft (33) is installed on the step (3), a second roller (34) is installed on the second installation shaft (33), and the second roller (34) slides along the second groove (14), the frame (1) is also provided with an opening (15) for cutting off the second groove (14), a flip assembly and a reset assembly are installed at a position of the first groove (13) corresponding to the opening (15), two groups of cleaning assemblies are installed at the lower part of the frame (1), and the step (3) comprises a tread surface, an arc surface and an inclined surface. The cleaning component comprises a cleaning liquid nozzle, a pre-cleaning roller, a clean water nozzle, a cleaning mechanism (5) and a water wiping mechanism (6) which are sequentially arranged along the moving direction of the roller chain (2); one group of cleaning components is installed in the area with the treading surface facing downward, and the other group of cleaning components is installed at the position where the opening (15) is set; when the roller chain (2) drives the step (3) to move to the lower end of the opening (15), the flipping component drives the arc surface of the step (3) to flip to face the cleaning component; when the roller chain (2) drives the step (3) to move to the upper end of the opening (15), the reset component drives the step (3) to flip to face the treading surface and face the cleaning component; two groups of shells (11) corresponding to the cleaning components are installed at the lower part of the frame (1); water storage tanks (12) are installed inside the shells (11); and the cleaning components are installed on the upper part of the water storage tanks (12).

2. A self-cleaning step ladder according to claim 1, characterized in that: The roller chain (2) comprises a plurality of first rollers (22), the first rollers (22) being connected in sequence via a connecting rod (21), the first installation shafts (31) being installed on the roller chain (2) at equal intervals, and the first installation shafts (31) being rotationally connected to the corresponding first rollers (22), the length of the first installation shafts (31) being greater than the length of the second installation shafts (33), and the depth of the first grooves (13) being greater than the depth of the second grooves (14).

3. A self-cleaning step ladder according to claim 2, characterized in that: The cleaning mechanism (5) comprises a supporting mechanism (4) and two groups of washing rollers (7); when the supporting mechanism (4) drives the washing rollers (7) to turn 180 degrees, the supporting mechanism (4) presses the washing rollers (7) away from the step (3); and the wiping mechanism (6) comprises a supporting mechanism (4) and a wiping roller (8); when the supporting mechanism (4) drives the wiping rollers (8) to turn 180 degrees, the supporting mechanism (4) presses the wiping rollers (8) away from the step (3).

4. A self-cleaning step ladder according to claim 3, characterized in that: The support mechanism (4) comprises two groups of brackets (41), both groups of brackets (41) are fixedly connected to the inner wall of the water storage tank (12), and an inner shaft (42) is rotatably mounted on the bracket (41), an outer shaft (43) is sleeved on the outer side of the inner shaft (42), the outer shaft (43) slides along the length direction of the inner shaft (42), and support elastic rods (46) are mounted on the outer wall of the outer shaft (43) near both ends, the support elastic rods (46) are symmetrically arranged about the central axis of the outer shaft (43), and the ends of the support elastic rods (46) are fixedly connected to mounting seats (461), the scrubbing roller (7) comprises a first connecting shaft (71), both ends of the first connecting shaft (71) are rotatably connected to the corresponding mounting seats (461), a driving assembly for driving the first connecting shaft (71) to rotate is arranged on the outer shaft (43), a first motor (44) is mounted on the side wall of one bracket (41), and the output shaft of the first motor (44) is fixedly connected to the inner shaft (42).

5. A self-cleaning step ladder according to claim 4, characterized in that: The driving assembly comprises a bearing seat (47) mounted on the end of the outer shaft (43); a second motor (471) is mounted on the bearing seat (47); a belt pulley is mounted on the output end of the second motor (471); the belt pulley is connected to the two sets of first connecting shafts (71) through a transmission belt (472); a tensioning elastic rod (48) is also mounted on the bearing seat (47); the end of the tensioning elastic rod (48) is rotatably connected to a tensioning wheel that supports the transmission belt (472).

6. A self-cleaning step ladder according to claim 5, characterized in that: The scrubbing roller (7) further comprises a plurality of bearing blocks (72) sleeved on the first connecting shaft (71), the bearing blocks (72) sliding along the length of the first connecting shaft (71), a long groove for limiting the bearing blocks (72) being provided on the first connecting shaft (71), the outer walls of the bearing blocks (72) being connected to a scrubbing brush (74), the areas between the bearing blocks (72) on the first connecting shaft (71) being sleeved with springs (73), and a spring (73) being provided in the middle of the first connecting shaft (71) A bearing block (72) is fixedly connected to the outer wall of the first connecting shaft (71), and pressure blocks (49) are sleeved on both ends of the first connecting shaft (71). Limiting bars (45) are installed on the bracket (41), and the lower part of the limiting bar (45) is inclined toward the middle part of the first connecting shaft (71). When the outer shaft (43) drives the supporting elastic rod (46) to rotate 180 degrees, the pressure block (49) squeezes the cleaning brush (74) toward the middle part of the first connecting shaft (71) under the restriction of the limiting bar (45).

7. A self-cleaning step ladder according to claim 6, characterized in that: The water-wiping roller (8) comprises a second connecting shaft (81), the second connecting shaft (81) is rotatably connected to a mounting seat (461) mounted on another bracket (41), and pressure blocks (49) are sleeved on both ends of the second connecting shaft (81). A limit strip (45) is also obliquely mounted on the other bracket (41), and when the water-wiping roller (8) contacts the step (3), the pressure block (49) contacts the outwardly opened side of the limit strip (45).

8. The self-cleaning step ladder according to claim 7, characterized in that: The opening (15) is opened at an angle, the flip assembly is a first rack (17), the first rack (17) is arranged at a position of the first groove (13) corresponding to the lower end of the opening (15), the reset assembly is a second rack (18), the second rack (18) is arranged at a position of the first groove (13) corresponding to the upper end of the opening (15), the end of the first installation shaft (31) is connected with a gear (32), when the roller chain (2) drives the first installation shaft (31) to move to the position of the first rack (17), the first rack (17) drives the gear (32) to rotate until the arc surface of the step (3) is directly opposite to the cleaning assembly, when the roller chain (2) drives the first installation shaft (31) to move to the position of the second rack (18), the second rack (18) drives the gear (32) to drive the step (3) to continue to rotate until the second roller (34) on the step (3) moves into the second groove (14).

9. A self-cleaning step ladder according to claim 8, characterized in that: A third groove (16) is provided on the inner wall of the water storage tank (12) at a position corresponding to the middle of the opening (15). When the first rack (17) drives the gear (32) to rotate to face the arc surface and the cleaning component, the second roller (34) on the step (3) moves into the third groove (16).

10. The self-cleaning step ladder according to claim 9, characterized in that: The bearing block (72) comprises an outer ring and an inner ring. The thickness of the outer ring is equal to the width of the cleaning brush (74), and the thickness of the inner ring is smaller than that of the outer ring. Both ends of the spring (73) are fixedly connected to the corresponding inner ring.

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