Foldable diaphragm wall slot wall brush

Abstract

This invention discloses a foldable wall brush for diaphragm wall construction, relating to the field of diaphragm wall construction. The technical solution includes a grab bucket assembly and brushers mounted on the grab bucket assembly. Each grab bucket has a set of brushers, each brusher comprising two swing arms rotatably mounted on the grab bucket. A rotating shaft is rotatably mounted at the movable end of each swing arm, with a traveling wheel coaxially fixed at each end of the shaft. A roller brush is sleeved in the middle. A control arm is fixedly mounted at the end of each push rod near the grab bucket. A buffer is rotatably mounted at the movable end of each control arm, and the buffer is rotatably connected to the swing arm. When the grab bucket opens and closes, the push rod drives the control arm to move, which in turn drives the swing arm to swing around its hinge point with the grab bucket via the buffer, thereby unfolding or folding the brusher. The beneficial effects of this invention are: the brusher and the grab bucket's opening and closing actions are mechanically linked, automatically unfolding for cleaning when the grab bucket opens and folding synchronously when it closes, eliminating the need for separately lowering the cleaning equipment and improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of diaphragm wall construction, and in particular to a foldable diaphragm wall groove brush. Background Technology

[0002] Diaphragm walls, as an important deep foundation pit support and seepage prevention structure, are widely used in subway, bridge, high-rise building, and water conservancy projects. After trenching is completed, the trench walls (especially the concrete joint surfaces between adjacent trench sections) are often covered with mud, sediment, weak interlayers, and other debris. If not removed, this will seriously affect the bond strength between the old and new concrete, leading to quality problems such as wall leakage and insufficient load-bearing capacity. Therefore, efficient and thorough cleaning of the trench walls is a key process to ensure the construction quality of diaphragm walls.

[0003] Currently, the cleaning of underground continuous wall trenches on-site typically employs a specialized single-sided wall brush, which has a simple structure and generally weighs 1 to 2 tons. During construction, a crane is used to hold the wall brush close to the concrete joint of the adjacent trench section, and manual operation is required to repeatedly lift and scrape until no more dirt is carried out on the wire brush, at which point the cleaning is considered complete.

[0004] However, this method has obvious limitations: on the one hand, due to the small weight of the equipment, the wall brush has insufficient adhesion to the tank wall, making it difficult to effectively remove firmly attached mud or weak layers, resulting in low cleaning efficiency and unstable results; on the other hand, simply increasing the weight of the wall brush to improve the cleaning force will lead to problems such as increased manufacturing costs, difficulties in transportation and hoisting, and reduced on-site operational flexibility, and still cannot solve the fundamental defects such as cleaning blind spots and low degree of automation. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a foldable wall-mounted brush.

[0006] The technical solution includes a grab bucket assembly and a wall brusher mounted on the grab bucket assembly. The grab bucket assembly includes a frame, a hydraulic cylinder, a slider, a push rod, and a double-lobed grab bucket. The slider slides on the frame. One end of the hydraulic cylinder is connected to the slider and the other end is connected to the frame, thereby controlling the up and down movement of the slider through the hydraulic cylinder. The double-lobed grab includes two grabs arranged opposite each other. The inner sides of the two grabs are respectively hinged to the lower end of the frame. There are four push rods. The upper ends of two push rods are hinged to one side of the slider, and the lower ends are respectively hinged to the rear of the corresponding grab. The other two push rods are symmetrically arranged on the other side of the slider and hinged to the other grab. Each of the grab buckets is provided with a set of wall brushers. Each wall brusher includes two swing arms rotatably mounted on the grab bucket. The movable end of each swing arm is rotatably mounted with a rotating shaft. A traveling wheel is coaxially fixed at both ends of the rotating shaft. A roller brush is sleeved in the middle. A transmission unit is provided between the rotating shaft and the roller brush to transmit the rotational motion of the traveling wheel to the roller brush to drive it to rotate. Each push rod is fixedly equipped with a control arm at one end near the grab bucket. The movable end of the control arm is rotatably equipped with a buffer. The buffer is rotatably connected to the middle of an adjacent swing arm. When the grab bucket is opened or closed, the push rod drives the control arm to move, and the buffer drives the swing arm to swing around its hinge point with the grab bucket, thereby realizing the unfolding or folding of the wall brush.

[0007] Preferably, the transmission unit is provided in two sets, and the two sets of transmission units are arranged symmetrically on both sides of the roller brush; Each transmission unit includes a gear ring fixedly mounted on the end of the roller brush, a drive gear fixedly mounted on the end of the rotating shaft, and a gear frame fixedly mounted on the movable end of the swing arm. A plurality of intermediate gears are rotatably mounted on the gear carrier, and the intermediate gears mesh with the gear ring and the driving gear respectively.

[0008] Preferably, the buffer includes an inner tie rod and an outer tie rod; One end of the inner pull rod is rotatably connected to the middle of the swing arm, and one end of the outer pull rod is rotatably connected to the control arm; The other end of the inner tie rod and the other end of the outer tie rod are respectively fixedly provided with collars, and the inner tie rod and the outer tie rod are sleeved together by corresponding collars and slide along the axial direction; A buffer spring is fitted around the outer side of the inner and outer pull rods, and the two ends of the buffer spring are respectively fixedly connected to the two collars.

[0009] Preferably, two side brush arms are rotatably mounted on the rotating shaft, with the two side brush arms located on both sides of the roller brush respectively. Each side brush arm has a side brush plate rotatably connected to its free end, which is used to compensate for cleaning the groove wall area that cannot be cleaned at both ends of the roller brush due to the obstruction of the traveling wheel. A driving bevel gear is coaxially fixed on the rotating shaft. The driving bevel gear meshes with a driven bevel gear. The driven bevel gear is rotatably connected to the side brush arm on the corresponding side. A transmission rod is fixedly connected to the driven bevel gear, and the transmission rod is connected to the corresponding side brush plate through a coupling.

[0010] Preferably, an elastic support rod is rotatably connected to the swing arm, and the free end of the elastic support rod is rotatably connected to the middle of the adjacent side brush arm. The elastic support rod includes an inner sleeve rod rotatably disposed on the swing arm and an outer sleeve rod slidably disposed on the outside of the inner sleeve rod, the free end of the outer sleeve rod being rotatably connected to the side brush arm; A support spring is fitted around the outer periphery of the inner sleeve rod and the outer sleeve rod. One end of the support spring is fixedly connected to the end of the inner sleeve rod, and the other end is fixedly connected to the end of the outer sleeve rod.

[0011] Preferably, the side brush plate includes a mounting plate and multiple sets of steel wire bristles distributed circumferentially along the mounting plate; The mounting plate is coaxially connected to the transmission rod via the coupling, so that the side brush plate rotates synchronously with the transmission rod, thereby achieving compensated cleaning of the areas covered by the traveling wheels at both ends of the roller brush.

[0012] Preferably, the roller brush includes a spindle and multiple rows of bristle assemblies distributed along the axial direction of the spindle, wherein each row of bristle assemblies consists of multiple steel wire bristles spirally wound and fixed on the spindle.

[0013] The beneficial effects of the technical solution provided by the embodiments of the present invention are: 1. Realize the integrated operation of mud grabbing and cleaning: The wall brusher is mechanically linked with the opening and closing action of the grab bucket through the push rod, control arm and buffer. When the grab bucket is opened, it automatically unfolds for cleaning and folds and retracts synchronously when it is closed. There is no need to lower the cleaning equipment separately, which significantly shortens the construction cycle and improves the work efficiency. 2. Self-driven roller brush, no external power source required: The roller brush utilizes the rotational motion generated by the contact between the traveling wheels and the trough wall to transmit power to the roller brush through the transmission unit, achieving a purely mechanical self-driven cleaning system. The system is simple and reliable, and is suitable for complex working conditions such as underwater and deep troughs.

[0014] 3. Comprehensive cleaning coverage, eliminating blind spots at the ends: Side brush plates driven by bevel gears are added to both sides of the roller brush to compensate for the cleaning of areas blocked by the traveling wheels. This effectively solves the problem of cleaning dead corners at the joints in traditional single roller brush structures, ensuring the overall cleaning quality of the tank wall. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the grab bucket opening according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the grab bucket closing according to an embodiment of the present invention.

[0018] Figure 4This is a schematic diagram of a wall brush device according to an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the swing arm and roller brush structures according to an embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the push rod and buffer structure according to an embodiment of the present invention.

[0021] Figure 7 This is a schematic diagram of the transmission unit according to an embodiment of the present invention.

[0022] Figure 8 This is a schematic diagram of the side brush arm and its accessories according to an embodiment of the present invention.

[0023] The attached figures are labeled as follows: 1. Grab bucket assembly; 2. Brush; 3. Frame; 4. Slider; 5. Push rod; 6. Grab bucket; 7. Swing arm; 8. Rotary shaft; 9. Traveling wheel; 10. Roller brush; 11. Transmission unit; 12. Control arm; 13. Buffer; 14. Gear ring; 15. Drive gear; 16. Gear frame; 17. Intermediate gear; 18. Inner tie rod; 19. Outer tie rod; 20. Collar; 21. Buffer spring; 22. Side brush arm; 23. Side brush plate; 24. Drive bevel gear; 25. Driven bevel gear; 26. Transmission rod; 27. Coupling; 28. Elastic support rod. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Example 1 See Figures 1 to 8 The present invention provides a foldable wall-mounted groove brush, including a grab bucket assembly 1 and a brush 2 disposed on the grab bucket assembly 1. The grab bucket assembly 1 includes a frame 3, a hydraulic cylinder, a slider 4, a push rod 5 and a double-lobed grab bucket 6. The slider 4 slides on the frame 3. One end of the hydraulic cylinder is connected to the slider 4 and the other end is connected to the frame 3, thereby controlling the up and down sliding of the slider 4 through the hydraulic cylinder. The double-lobed grab bucket 6 includes two grab buckets 6 arranged opposite each other. The inner sides of the two grab buckets 6 are respectively hinged to the lower end of the frame 3. There are four push rods 5. The upper ends of two push rods 5 are hinged to one side of the slider 4, and the lower ends are respectively hinged to the rear of the corresponding grab bucket 6. The other two push rods 5 are symmetrically arranged on the other side of the slider 4 and hinged to the other grab bucket 6. Each grab bucket 6 is equipped with a set of wall brushers 2. The wall brusher 2 includes two swing arms 7 rotatably mounted on the grab bucket 6. The movable end of the swing arm 7 is rotatably mounted with a rotating shaft 8. A walking wheel 9 is coaxially fixed at both ends of the rotating shaft 8. A roller brush 10 is sleeved in the middle. A transmission unit 11 is provided between the rotating shaft 8 and the roller brush 10 to transmit the rotational motion of the walking wheel 9 to the roller brush 10 to drive it to rotate. Each push rod 5 is fixedly equipped with a control arm 12 near one end of the grab bucket 6. The movable end of the control arm 12 is rotatably equipped with a buffer 13. The buffer 13 is rotatably connected to the middle of an adjacent swing arm 7. When the grab bucket 6 is opened or closed, the push rod 5 drives the control arm 12 to move, and through the buffer 13, drives the swing arm 7 to swing around its hinge point with the grab bucket 6, thereby realizing the unfolding or folding of the wall brush 2.

[0029] When this device performs mud grabbing operation, the grab bucket 6 is in the open state and moves down against the tank wall. At this time, the wall brush 2 unfolds synchronously and the roller brush 10 is in close contact with the tank wall. As the equipment moves in the tank, the traveling wheel 9 rolls and rotates due to contact with the tank wall, and drives the roller brush 10 to rotate through the transmission unit 11, so as to complete the cleaning operation of the attached material on the tank wall synchronously during the lowering of the grab bucket 6. When the grab bucket 6 descends to the bottom of the tank, the grab bucket 6 closes to grab the sediment or mud at the bottom of the tank; at the same time, the push rod 5 drives the control arm 12 fixed at its end to move inward synchronously, and pulls the swing arm 7 to swing inward around the hinge point between it and the grab bucket 6 via the buffer 13, so that the wall brush 2 automatically folds and retracts, and the roller brush 10 disengages from the tank wall to avoid damage caused by squeezing or friction during the mud grabbing and closing process. After the mud grabbing is completed, during the equipment lifting process, the grab bucket 6 remains closed and the wall brush 2 remains folded, minimizing the overall machine outline. After lifting to the next cleaning depth or returning to the ground, the grab bucket 6 can be opened again to repeat the above cleaning and mud grabbing cycle.

[0030] The transmission unit 11 is provided in two sets, and the two sets of transmission units 11 are arranged symmetrically on both sides of the roller brush 10. Each transmission unit 11 includes a gear ring 14 fixedly mounted at the end of the roller brush 10, a drive gear 15 fixedly mounted at the end of the rotating shaft 8, and a gear frame 16 fixedly mounted at the movable end of the swing arm 7. Several intermediate gears 17 are rotatably mounted on the gear carrier 16, and the intermediate gears 17 mesh with the gear ring 14 and the driving gear 15 respectively.

[0031] During the cleaning process, the traveling wheel 9 rolls along the groove wall as the equipment moves, driving the rotating shaft 8 and the drive gear 15 to rotate synchronously. The drive gear 15 transmits the motion to the gear ring 14 at the end of the roller brush 10 through the intermediate gear 17. Since the drive gear 15 and the intermediate gear 17 are externally meshed and the intermediate gear 17 and the gear ring 14 are internally meshed, after two stages of meshing, the rotation direction of the roller brush 10 is opposite to that of the traveling wheel 9, forming a reverse scraping action, which effectively improves the cleaning efficiency. The rotational speed of the roller brush 10 is determined by the rotational speed of the traveling wheel 9 through the gear pair, and is automatically adjusted according to the moving speed of the equipment: the faster the movement, the higher the rotational speed of the roller brush 10 and the greater the cleaning force; at the same time, because the two sets of transmission units 11 are symmetrically arranged on both sides of the roller brush 10, the two ends of the roller brush 10 obtain synchronous and balanced driving force, ensuring smooth rotation and no off-center load.

[0032] The buffer 13 includes an inner tie rod 18 and an outer tie rod 19; One end of the inner tie rod 18 is rotatably connected to the middle of the swing arm 7, and one end of the outer tie rod 19 is rotatably connected to the control arm 12; The other end of the inner tie rod 18 and the other end of the outer tie rod 19 are respectively fixedly provided with collars 20, and the inner tie rod 18 and the outer tie rod 19 are sleeved together by the corresponding collars 20 and slide along the axial direction. A buffer spring 21 is sleeved on the outer side of the inner tie rod 18 and the outer tie rod 19, and the two ends of the buffer spring 21 are fixedly connected to two collars 20 respectively.

[0033] When the grab bucket 6 opens, the push rod 5 drives the control arm 12 to move outward, and the control arm 12 pulls the buffer 13 through the outer pull rod 19 connected to it. The outer tie rod 19 is sleeved with the inner tie rod 18 at the end of the outer tie rod 18 through the collar 20 at its end and slides along the axial direction to transmit the tension to the inner tie rod 18; The other end of the inner pull rod 18 is rotatably connected to the middle of the swing arm 7, thereby driving the swing arm 7 to swing outward around its hinge point with the grab bucket 6, so that the wall brush 2 unfolds and the roller brush 10 is attached to the tank wall. During this process, if there are local protrusions, rebar ends or uneven areas on the tank wall, the roller brush 10 will be subjected to additional impact or resistance, and will push the inner tie rod 18 in the opposite direction through the swing arm 7, causing it to generate axial compression displacement relative to the outer tie rod 19. At this time, the buffer spring 21 sleeved on the outer side of the inner and outer tie rods 19 is compressed to absorb the impact energy and provide flexible support through elastic deformation; When the grab bucket 6 closes, the control arm 12 moves in the opposite direction, the outer pull rod 19 pushes the inner pull rod 18 to retract, the swing arm 7 swings inward, and the wall brush 2 folds and retracts simultaneously to avoid the mechanism from jamming or being damaged due to rigid collision.

[0034] Two side brush arms 22 are rotatably mounted on the rotating shaft 8. The two side brush arms 22 are located on both sides of the roller brush 10. The free end of each side brush arm 22 is rotatably connected to a side brush plate 23, which is used to compensate for cleaning the groove wall area at both ends of the roller brush 10 that cannot be cleaned due to the obstruction of the traveling wheel 9. A drive bevel gear 24 is coaxially fixed on the rotating shaft 8. The drive bevel gear 24 meshes with a driven bevel gear 25. The driven bevel gear 25 is rotatably connected to the side brush arm 22 on the corresponding side. A transmission rod 26 is fixedly connected to the driven bevel gear 25, and the transmission rod 26 is connected to the corresponding side brush plate 23 through a coupling 27.

[0035] When the grab bucket 6 opens and the wall brush 2 unfolds, the roller brush 10 is pressed against the main area of ​​the tank wall. At the same time, the two side brush arms 22 located on both sides of the roller brush 10 also unfold, so that the side brush plates 23 at their free ends are pressed against the cleaning blind area formed by the roller brush 10 end being blocked by the walking wheel 9 on the tank wall. When the equipment moves downward along the groove, the rotating shaft 8 rotates synchronously with the traveling wheel 9, which drives the active bevel gear 24, which is fixed on the same axis as it, to rotate together. The active bevel gear 24 transmits the rotational motion to the driven bevel gear 25 through meshing. Since the driven bevel gear 25 is rotatably connected to the corresponding side brush arm 22, and a transmission rod 26 is fixedly connected to it, the transmission rod 26 transmits torque to the side brush plate 23 through the coupling 27, thereby driving the side brush plate 23 to rotate around its own axis. During rotation, the side brush plate 23 continuously cleans the groove wall areas that the roller brush 10 cannot cover, achieving effective compensation cleaning of the joint area or the dead corner of the groove wall edge.

[0036] When the grab bucket 6 is closed, the side brush arm 22 folds inward along with the wall brusher 2, and the side brush plate 23 detaches from the tank wall to avoid interference during the lifting process.

[0037] An elastic support rod 28 is also rotatably connected to the swing arm 7, and the free end of the elastic support rod 28 is rotatably connected to the middle of the adjacent side brush arm 22. The elastic support rod 28 includes an inner sleeve rod rotatably disposed in the swing arm 7 and an outer sleeve rod slidably disposed on the outside of the inner sleeve rod, the free end of the outer sleeve rod being rotatably connected to the side brush arm 22; Support springs are fitted around the outer circumference of the inner sleeve rod and the outer sleeve rod. One end of the support spring is fixedly connected to the end of the inner sleeve rod, and the other end is fixedly connected to the end of the outer sleeve rod.

[0038] During the cleaning process, if there are uneven areas, protruding steel bars, or thick deposits on the tank wall, the side brush plate 23 will be subjected to additional reaction force, which will be transmitted to the elastic support rod 28 through the side brush arm 22. At this time, the outer sleeve rod slides and compresses axially relative to the inner sleeve rod, and the support spring sleeved on the outer periphery of both is compressed accordingly, absorbing the impact load and generating elastic restoring force. This elastic force ensures that the side brush plate 23 always adheres to the groove wall with appropriate pressure, which not only guarantees the cleaning effect but also avoids damage to the mechanism caused by rigid collisions.

[0039] The side brush plate 23 includes a mounting plate and multiple sets of steel wire bristles distributed circumferentially along the mounting plate; The mounting plate is coaxially connected to the transmission rod 26 via the coupling 27, so that the side brush plate 23 rotates synchronously with the transmission rod 26, thereby achieving compensatory cleaning of the areas blocked by the traveling wheels 9 at both ends of the roller brush 10.

[0040] The side brush plate 23 uses multiple sets of circumferentially distributed steel wire bristles, which form a continuous and dense brushing surface during rotation, significantly improving the coverage density and cleaning efficiency of the blind area at the end of the roller brush 10. The wire brush bristles have a certain degree of flexibility and rigidity, and can conform to the slight undulations of the groove wall or the gaps between the reinforcing bars during rotation, effectively removing stubborn deposits at the joints.

[0041] The roller brush 10 includes a spindle and multiple rows of bristle assemblies distributed along the spindle axis. Each row of bristle assemblies consists of multiple steel wire bristles spirally wound and fixed on the spindle.

[0042] The steel wire bristles are fixed to the mandrel in a spiral winding manner, forming a continuous spiral cleaning path when the roller brush 10 rotates, avoiding strip-shaped missed areas that may be generated by straight bristles, and improving cleaning uniformity. The spirally arranged bristles have a certain self-draining ability during rotation, reducing the accumulation of mud between the bristles and maintaining cleaning efficiency.

[0043] When this invention is used, the grab bucket 6 is in an open state and moves down against the tank wall when the device is performing mud grabbing operation. At this time, the wall brush 2 is deployed simultaneously and the roller brush 10 is in close contact with the tank wall. As the device moves in the tank, the traveling wheel 9 rolls and rotates due to contact with the tank wall, and drives the roller brush 10 to rotate through the transmission unit 11, thereby completing the cleaning operation of the attached material on the tank wall simultaneously during the lowering of the grab bucket 6. When the grab bucket 6 descends to the bottom of the tank, the grab bucket 6 closes to grab the sediment or mud at the bottom of the tank; at the same time, the push rod 5 drives the control arm 12 fixed at its end to move inward synchronously, and pulls the swing arm 7 to swing inward around the hinge point between it and the grab bucket 6 via the buffer 13, so that the wall brush 2 automatically folds and retracts, and the roller brush 10 disengages from the tank wall to avoid damage caused by squeezing or friction during the mud grabbing and closing process. After the mud grabbing is completed, during the equipment lifting process, the grab bucket 6 remains closed and the wall brush 2 remains folded, minimizing the overall machine outline. After lifting to the next cleaning depth or returning to the ground, the grab bucket 6 can be opened again to repeat the above cleaning and mud grabbing cycle.

[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A foldable wall-mounted brush, characterized in that, The system includes a grab bucket assembly (1) and a wall brush (2) mounted on the grab bucket assembly (1). The grab bucket assembly (1) includes a frame (3), a hydraulic cylinder, a slider (4), a push rod (5), and a double-lobed grab bucket (6). The slider (4) slides on the frame (3). One end of the hydraulic cylinder is connected to the slider (4), and the other end is connected to the frame (3), thereby controlling the up and down movement of the slider (4) through the hydraulic cylinder. The double-lobed grab (6) includes two grabs (6) arranged opposite to each other. The inner sides of the two grabs (6) are respectively hinged to the lower end of the frame (3). There are four push rods (5). The upper ends of two push rods (5) are hinged to one side of the slider (4), and the lower ends are respectively hinged to the rear of the corresponding grab (6). The other two push rods (5) are symmetrically arranged on the other side of the slider (4) and hinged to the other grab (6). Each of the grab buckets (6) is provided with a set of wall brushes (2). Each wall brush (2) includes two swing arms (7) rotatably mounted on the grab bucket (6). The movable end of each swing arm (7) is rotatably mounted with a rotating shaft (8). A walking wheel (9) is coaxially fixed at both ends of the rotating shaft (8). A roller brush (10) is sleeved in the middle. A transmission unit (11) is provided between the rotating shaft (8) and the roller brush (10) to transmit the rotational motion of the walking wheel (9) to the roller brush (10) to drive it to rotate. Each push rod (5) is fixedly provided with a control arm (12) at one end near the grab bucket (6). The movable end of the control arm (12) is rotatably provided with a buffer (13). The buffer (13) is rotatably connected to the middle of an adjacent swing arm (7). When the grab bucket (6) is opened or closed, the push rod (5) drives the control arm (12) to move. The buffer (13) drives the swing arm (7) to swing around its hinge point with the grab bucket (6), thereby realizing the unfolding or folding of the wall brush (2).

2. The foldable wall-mounted brush according to claim 1, characterized in that, The transmission unit (11) is provided in two sets, and the two sets of transmission units (11) are symmetrically arranged on both sides of the roller brush (10); Each transmission unit (11) includes a gear ring (14) fixedly disposed at the end of the roller brush (10), a drive gear (15) fixedly disposed at the end of the rotating shaft (8), and a gear frame (16) fixedly disposed at the movable end of the swing arm (7). A plurality of intermediate gears (17) are rotatably mounted on the gear carrier (16), and the intermediate gears (17) mesh with the gear ring (14) and the driving gear (15) respectively.

3. The foldable wall-mounted brush according to claim 2, characterized in that, The buffer (13) includes an inner tie rod (18) and an outer tie rod (19). One end of the inner pull rod (18) is rotatably connected to the middle of the swing arm (7), and one end of the outer pull rod (19) is rotatably connected to the control arm (12); The other end of the inner tie rod (18) and the other end of the outer tie rod (19) are respectively fixedly provided with collars (20), and the inner tie rod (18) and the outer tie rod (19) are sleeved together by the corresponding collars (20) and slide along the axial direction; A buffer spring (21) is sleeved on the outer side of the inner pull rod (18) and the outer pull rod (19), and the two ends of the buffer spring (21) are respectively fixedly connected to the two collars (20).

4. The foldable wall-mounted brush according to claim 1, characterized in that, Two side brush arms (22) are rotatably mounted on the rotating shaft (8). The two side brush arms (22) are located on both sides of the roller brush (10). Each side brush arm (22) has a side brush plate (23) rotatably connected to its free end, which is used to compensate for cleaning the groove wall area that cannot be cleaned at both ends of the roller brush (10) due to the obstruction of the walking wheel (9). The rotating shaft (8) is coaxially fixed with an active bevel gear (24), which meshes with a driven bevel gear (25). The driven bevel gear (25) is rotatably connected to the side brush arm (22) on the corresponding side. A transmission rod (26) is fixedly connected to the driven bevel gear (25), and the transmission rod (26) is connected to the corresponding side brush plate (23) through a coupling (27).

5. The foldable wall-mounted brush according to claim 4, characterized in that, An elastic support rod (28) is rotatably connected to the swing arm (7), and the free end of the elastic support rod (28) is rotatably connected to the middle of the adjacent side brush arm (22). The elastic support rod (28) includes an inner sleeve rod rotatably disposed on the swing arm (7) and an outer sleeve rod slidably disposed on the outside of the inner sleeve rod. The free end of the outer sleeve rod is rotatably connected to the side brush arm (22). A support spring is fitted around the outer periphery of the inner sleeve rod and the outer sleeve rod. One end of the support spring is fixedly connected to the end of the inner sleeve rod, and the other end is fixedly connected to the end of the outer sleeve rod.

6. The foldable wall-mounted brush according to claim 4, characterized in that, The side brush plate (23) includes a mounting plate and multiple sets of steel wire bristles distributed circumferentially along the mounting plate; The mounting plate is coaxially connected to the transmission rod (26) via the coupling (27), so that the side brush plate (23) rotates synchronously with the transmission rod (26) to achieve compensation cleaning of the area covered by the traveling wheels (9) at both ends of the roller brush (10).

7. The foldable wall-mounted brush according to claim 1, characterized in that, The roller brush (10) includes a spindle and multiple rows of brush bristle assemblies distributed along the axial direction of the spindle. Each row of brush bristle assemblies consists of multiple steel wire bristles spirally wound and fixed on the spindle.

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