A floor crack repair device

Abstract

This invention provides a floor crack repair device, comprising: a frame; wheels mounted at the bottom of the frame; a material storage container mounted on the frame; a grouting component connected to the material storage container, and a switch component between the material storage container and the grouting component; and two staggered linkage control components, both connected to the wheels and the switch components. This invention, by setting a linkage control mechanism connected to the wheels and coordinating it with the switch components, directly correlates the rotation state of the wheels with the opening and closing of the switch components. In particular, through the two staggered linkage control components, fully automatic synchronous operation is achieved: "automatic grout supply when moving, and grout discharge when stopping." Operators only need to push or pull the frame along the crack to complete the repair, without any manual operation of the switches or squeezing actions, significantly reducing labor intensity and improving repair efficiency and quality.

Description

Technical Field

[0001] This invention relates to the field of floor construction and maintenance technology, and more specifically, to a floor crack repair device. Background Technology

[0002] Flooring refers to the treatment of existing ground using specific materials and processes to achieve certain decorative and functional properties. Examples include epoxy self-leveling flooring, emery abrasion-resistant flooring, epoxy terrazzo flooring, cement-based terrazzo flooring, epoxy colored sand flooring, epoxy anti-static flooring, epoxy anti-slip flooring, polyurea anti-corrosion flooring, polyurethane flooring, silicone PU flooring, and concrete sealing and curing agent flooring.

[0003] During or after floor construction, cracks often appear due to temperature changes, drying shrinkage, or uneven settlement of the concrete base. To ensure the overall strength, aesthetics, and durability of the floor, timely repair of these cracks is necessary. During repair work, operators typically need to use a handheld repair device to walk along the crack and inject grout into it.

[0004] However, existing small handheld or cart-type floor crack repair devices typically rely on manually operated valves or switches for slurry control. Operators must simultaneously monitor the walking route, aim the spray gun at the crack, and manually control the slurry dispensing, making the process cumbersome and tiring. More importantly, manual control makes it difficult to precisely synchronize slurry dispensing with the device's movement: failure to promptly shut off the slurry when stopping leads to slurry accumulation and waste; failure to promptly restart the slurry when starting will interrupt the repair process. This results in inconsistent repair quality and requires a high level of operator skill. Summary of the Invention

[0005] In view of this, the present invention proposes a floor crack repair device, which aims to solve the problems of unstable repair quality and inconvenient operation caused by the difficulty in achieving synchronous control of walking and slurry discharge in existing floor crack repair devices.

[0006] This invention proposes a floor crack repair device, comprising: a frame; wheels mounted on the bottom of the frame for moving the frame on the ground; a storage container mounted on the frame for storing grout; an injection assembly connected to the storage container, wherein a switch assembly is provided between the storage container and the injection assembly to control the connection between them, so that the grout is output to the floor crack via the injection assembly; and two staggered linkage control assemblies, both of which are kinetically connected to the wheels and the switch assembly. When the wheels rotate, one of the linkage control assemblies drives the switch assembly to open, connecting the storage container to the injection assembly, while the other linkage control assembly squeezes the grout in the injection assembly to output the grout, thus repairing the crack. The device alternately replenishes and squeezes the grout in the injection assembly. When the wheels stop rotating, the linkage control assemblies drive the switch assembly to close, stopping the squeezing of the grout in the injection assembly and stopping the output of grout.

[0007] Furthermore, in the aforementioned floor crack repair device, the storage container includes two independently arranged storage cylinders; there are two switch components, each corresponding to one of the two storage cylinders and one of the two linkage control components; the switch component is located inside its corresponding storage cylinder, and the switch component is connected to the walking wheel via its corresponding linkage control component.

[0008] Furthermore, in the aforementioned floor crack repair device, the switching assembly includes: a piston plate, movably disposed inside the storage cylinder along its axial direction, and the piston plate is connected to the power output end of the linkage control assembly. The linkage control assembly converts the rotation of the traveling wheel into reciprocating linear motion of the piston plate along the axial direction of the storage cylinder, thereby squeezing the slurry below the piston plate for feeding; wherein the storage cylinder stores slurry above the piston plate, and the bottom of the storage cylinder communicates with the injection assembly; a rotary switch cover is rotatably disposed on the rotating assembly. The stopper plate is used to close when the piston plate moves downward, cutting off the connection between the space above the piston plate and the bottom of the storage cylinder, thereby cutting off the connection between the upper space of the storage cylinder and the injection assembly. It also works with the piston plate to squeeze the slurry below the piston plate downward, causing it to spray out from the injection assembly, so as to repair the crack by squeezing out the slurry. When the piston plate moves upward, the space below the piston plate increases, and the rotary switch cover rotates to the open position, so that the slurry above the piston plate enters the bottom of the storage cylinder from the rotary switch cover, thereby realizing bottom opening feeding.

[0009] Furthermore, in the aforementioned floor crack repair device, the linkage control component includes: an axis conversion component, the power input end of which is connected to the axle of the traveling wheel, for synchronous rotation with the axle of the traveling wheel; and a motion conversion component, the power input end of which is connected to the power output end of the axis conversion component, and the power output end of which is connected to the piston plate, for converting the output rotation of the axis conversion component into reciprocating linear motion of the piston plate along the axial direction of the storage cylinder.

[0010] Furthermore, in the above-mentioned floor crack repair device, the two axis conversion components of the two linkage control components are arranged to move synchronously in the same direction, and the two motion conversion components are arranged to move in opposite directions. This is so that when the power output end of one motion conversion component moves upward, the power output end of the other motion conversion component moves downward, so that the two storage cylinders can respectively open at the bottom for feeding and squeeze out slurry for discharging when the walking wheel moves.

[0011] Furthermore, in the aforementioned floor crack repair device, both of the motion conversion components are crank-connecting rod mechanisms, and their motion phases differ by 180 degrees, so that the motion directions of their power output ends are opposite.

[0012] Furthermore, in the aforementioned floor crack repair device, both of the axis conversion components are synchronous pulley structures. The two driving wheels of the two axis conversion components are coaxially arranged and both are mounted on the axle of the traveling wheel. The two driven wheels of the two axis conversion components are coaxially arranged for synchronous rotation. Both of the motion conversion components are connecting rod structures. The first end of each of the two motion conversion components is hinged to the two driven wheels, and the second end is hinged to the two piston plates, so that the motion conversion components, together with the driven wheels of the axis conversion components, form a crank-connecting rod mechanism. The first ends of the two motion conversion components are arranged 180° opposite each other in the same radial direction of the driven wheels, and the radial distances from the two first ends to the axis of the driven wheels are equal.

[0013] Furthermore, in the aforementioned floor crack repair device, the rotary switch cover is located below the piston plate, and an elastic reset member is provided between the rotary switch cover and the piston plate to apply a reset force to the rotary switch cover, so that when the piston plate moves downward, the rotary switch cover can rotate to the closed position under the action of the reset force to prevent the slurry below from flowing back.

[0014] Furthermore, in the aforementioned floor crack repair device, there are two traveling wheels, which are coaxially arranged and longitudinally positioned on both sides of the bottom of the frame; an auxiliary wheel is provided on one side of each of the two traveling wheels, with its longitudinal position between the two traveling wheels; the grouting assembly has a grout outlet, which is located at the same longitudinal position as the auxiliary wheel on the frame, so that the grout outlet discharges grout along the traveling trajectory of the auxiliary wheel.

[0015] Furthermore, in the aforementioned floor crack repair device, both the traveling wheel and the auxiliary wheel are omnidirectional wheels.

[0016] The floor crack repair device provided by this invention, by setting up a linkage control mechanism connected to the drive of the walking wheel, and by cooperating with the drive of the linkage control mechanism and the switch assembly, realizes a direct correlation between the rotation state of the walking wheel and the opening and closing of the switch assembly; in particular, by using two staggered linkage control components, it realizes a fully automatic synchronous operation of "automatic grout supply when walking and grout discharge when stopping". The operator only needs to push or pull the frame along the crack to complete the repair, without any manual operation of the switch or squeezing action, which significantly reduces labor intensity, improves repair efficiency and quality, and solves the problem that existing floor crack repair devices are difficult to achieve synchronous control of walking and grout discharge, resulting in unstable repair quality and inconvenient operation.

[0017] Furthermore, by setting the switch assembly as a linkage structure between the piston plate and the rotary switch cover, the up-and-down movement of the piston plate drives the opening and closing of the rotary switch cover, and coordinates with the squeezing action of the piston plate to complete the feeding and discharging of pulp. By setting two linkage control mechanisms arranged 180° apart and two independent storage cylinders, the piston plates in the two storage cylinders alternately perform upward feeding and downward squeezing to discharge pulp. The combined effect of the above structures enables the device to automatically turn on the switch and squeeze to discharge pulp when moving, and automatically turn off the switch and stop discharging pulp when stopping, realizing fully automatic synchronous operation of "discharging pulp as soon as it moves, and stopping pulp as soon as it stops". Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the structure of the floor crack repair device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the bottom section of the floor crack repair device provided in an embodiment of the present invention; Figure 3A schematic diagram of the structure of a single storage cylinder and its corresponding switch assembly and linkage control assembly provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the switching assembly provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of two switching components and two linkage control components provided in an embodiment of the present invention; 1-Frame, 11-Connecting rod, 12-Bearing seat, 2-Walking wheel, 21-Axle, 3-Storage container, 31-Storage cylinder, 3101-First storage cylinder, 3102-Second storage cylinder, 311-Telescopic cavity, 4-Injection assembly, 5-Switch assembly, 501-First switch assembly, 502-Second switch assembly, 51-Piston plate, 511-Inlet hole, 512-Vertical lifting rod, 52-Rotary switch cover, 6-Linkage control assembly, 601-First linkage control assembly, 602-Second linkage control assembly, 61-Axis conversion component, 6101-First axis conversion component, 6102-Second axis conversion component, 611-Drive wheel, 612-Driven wheel, 62-Motion conversion component, 6201-First motion conversion component, 6202-Second motion conversion component, 7-Auxiliary wheel. Detailed Implementation

[0019] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] See Figures 1 to 5 The figure illustrates a preferred structure of the floor crack repair device provided in an embodiment of the present invention. As shown, the device includes: a frame 1, wheels 2, a storage container 3, an injection assembly 4, a switch assembly 5, and a linkage control assembly 6; wherein, The walking wheels 2 are located at the bottom of the frame 1 and are used to drive the frame 1 to move on the ground.

[0021] Specifically, the frame 1 serves as the supporting skeleton for the entire device and can be constructed by welding or assembling metal profiles or plates. In this embodiment, one side of the frame 1, particularly the side facing away from the driving wheel 2 (e.g., Figure 1(As shown on the right side) A connecting rod 11 may be provided, located on the front side of the vehicle body, which can control the forward and backward movement and steering of the frame 1, and can be pulled to move the device along the crack. The frame 1 may also be provided with a bearing seat 12 for circumferential support of the traveling wheels 2. The number of traveling wheels 2 can be one or two pairs, with two traveling wheels 2 in each pair arranged coaxially and along the longitudinal direction of the frame 1 (e.g., ...). Figure 1 As shown in the AA direction, they are arranged on both sides of the bottom of the frame 1 (e.g., Figure 1 (As shown on the inner and outer sides), to drive the frame 1 to move smoothly on the ground. Bearings can be installed on the axle 21 of the traveling wheels 2, and are rotatably mounted on the bearing seat 12 via the bearings to reduce traveling resistance. The axle 21 is laterally (as shown on the inner and outer sides), to drive the frame 1 to move smoothly on the ground. Figure 1 The axle 21 (as shown in the BB direction) is rotatably connected to the frame 1, and the two ends of the axle 21 are fixedly connected to the running wheels 2. In this embodiment, one side of the two running wheels 2 (as shown in the BB direction) is connected to the frame 1. Figure 1 An auxiliary wheel 7 (shown on the right side) is provided, its longitudinal position being between the two traveling wheels 2. Preferably, along the AA direction, the auxiliary wheel 7 is positioned at the midpoint between the two traveling wheels 2. More preferably, the injection assembly 4 has a slurry outlet, which is positioned at the same longitudinal position as the auxiliary wheel 7 on the frame 1. That is, the horizontal connection line between the slurry outlet and the auxiliary wheel 7 is parallel to the longitudinal direction of the frame 1 (e.g., ...). Figure 1 The AA-direction arrangement shown is designed so that the grout outlet follows the travel path of the auxiliary wheel 7 for grouting. By setting the auxiliary wheel 7 and aligning it with the longitudinal position of the grout outlet, it is ensured that when the grouting assembly 4 follows the frame 1, the auxiliary wheel 7 can be embedded in the crack to provide guidance, and the grout outlet is always aligned with the crack area traversed by the auxiliary wheel 7, thereby improving the accuracy and stability of grouting. Both the traveling wheel 2 and the auxiliary wheel 7 are omnidirectional wheels, meaning they have an omnidirectional structure, thus ensuring that they can turn within a certain angle.

[0022] A storage container 3 is mounted on the frame 1 and is used to store the grout. Specifically, the storage container 3 is fixedly installed on the upper part of the frame 1, and its interior has a receiving cavity for storing the grout. The grout can be epoxy resin, polyurethane, cement-based grout, or other floor repair materials. The top of the storage container 3 may be equipped with a filling port and a sealing cap to prevent grout from splashing or evaporating. The bottom or lower side of the storage container 3 is equipped with a discharge port to connect to the injection assembly 4 via a pipeline for grout delivery.

[0023] The injection assembly 4 is connected to the storage container 3, and a switch assembly 5 is provided between the storage container 3 and the injection assembly 4 to control the on / off connection between them, so as to output slurry to the ground crack through the injection assembly 4. The injection assembly 4 may include a conveying hose and a slurry outlet pipe. The front end of the slurry outlet pipe is provided with a slurry outlet for outputting slurry to the ground crack. The switch assembly 5 is set in the connecting pipeline between the storage container 3 and the injection assembly 4. Specifically, it can be installed at the outlet of the storage container 3, the inlet of the injection assembly 4, or in the middle of the pipeline. Of course, the switch assembly 5 can also be set in other locations. In this embodiment, the switch assembly 5 is set inside the injection assembly 4, dividing the storage container 3 into a top storage area and a bottom discharge area. The bottom discharge area is connected to the injection assembly 4. By controlling the on / off connection between the top storage area and the bottom discharge area, the on / off connection between the storage container 3 and the injection assembly 4 is controlled. In this embodiment, the switch assembly 5 can adopt a normally closed valve structure, such as a spring-reset stop valve or a rotary valve, which remains closed when there is no external force or only the gravity of the slurry in the top storage area.

[0024] To achieve automatic and synchronous completion of grout discharge and injection during the movement process, this embodiment employs two staggered, interconnected control components 6: a first control component 601 and a second control component 602. Both control components 6 are connected to the traveling wheel 2 and the switch component 5. When the traveling wheel 2 rotates, one control component 6 drives the switch component 5 to open, connecting the storage container 3 to the injection component 4. The other control component 6 then squeezes the grout within the injection component 4 to output grout, thus repairing the cracks. This alternating process of replenishing and discharging grout into the injection component is repeated. When the traveling wheel 2 stops rotating, the control component 6 drives the switch component 5 to close, stopping the squeezing of grout into the injection component 4 and halting grout output. In this embodiment, the first control component 601 and the second control component 602 are positioned directly below the two storage cylinders 31.

[0025] Specifically, both linkage control components 6 are connected to the axle 21 of the walking wheel 2 or to a transmission component that rotates synchronously with the walking wheel 2, and both linkage control components 6 are also connected to the switch component 5.

[0026] When the operator pushes or pulls the frame 1, causing the wheels 2 to rotate on the ground, the first linkage control component 601 and the second linkage control component 602 move alternately. For example, the first linkage control mechanism is driven by the wheels 2, applying an opening force to the switch component 5. When the switch component 5 is opened, the flow channel between the storage container 3 and the injection component 4 is connected, and the slurry is injected into the cavity of the injection component 4 under pressure. At the same time, the second linkage control mechanism is also driven by the wheels 2, but because the two linkage control mechanisms are staggered, for example, they are offset at a certain angle in spatial position or have a sequence of actions, the staggered movement of the second linkage control mechanism can apply a squeezing force to the injection component 4, thereby squeezing the slurry placed in the injection component 4 from the slurry outlet and injecting it into the ground cracks. That is, the cracks are repaired by squeezing out the slurry. Of course, when the first linkage control mechanism is driven by the walking wheel 2 and applies pressure to the injection component 4, the slurry placed in the injection component 4 is squeezed out from the slurry outlet and injected into the ground crack. That is, when the crack is repaired by squeezing out the slurry, the second linkage control mechanism applies an opening force to the switch component 5, drives the switch component 5 to open, so that the flow channel between the storage container 3 and the injection component 4 is connected, and the slurry is replenished into the cavity of the injection component 4 under pressure.

[0027] When the walking wheel 2 stops rotating, both the first linkage control mechanism and the second linkage control mechanism stop moving, which can stop the driving force on the switch assembly 5 and stop the squeezing of the slurry in the injection assembly 4. This not only cuts off the connection between the storage container 3 and the injection assembly 4 and stops the feeding of the storage container 3, but also stops the slurry outlet from outputting slurry.

[0028] In this embodiment, "offset linkage" refers to the transmission connection points of the two linkage control mechanisms and the traveling wheel 2 being offset by a predetermined angle or distance in the circumferential direction or travel distance. This results in a phase difference between the start time and duration of the actions of the first and second linkage control mechanisms during one rotation of the traveling wheel 2. The power output ends of the first and second linkage control mechanisms can move in opposite directions. In particular, the two linkage control mechanisms are arranged in an offset linkage configuration, with symmetrical functions and a half-cycle difference in their action phases. During the first half-cycle of the traveling wheel 2's rotation, the power output end of the first linkage control mechanism moves in the forward direction, driving the switch assembly 5 to open, allowing the slurry in the storage container 3 to enter the filling assembly 4, thus replenishing the filling assembly 4. Simultaneously, the power output end of the second linkage control mechanism moves in the reverse direction, squeezing the slurry in the filling assembly 4 to complete the slurry discharge. In the latter half of the rotation of the traveling wheel 2, the power output end of the first linkage control mechanism moves in the reverse direction, squeezing the slurry in the injection component 4 to complete the slurry discharge. At the same time, the power output end of the second linkage control mechanism moves in the forward direction, driving the switch component 5 to open, allowing the slurry in the storage container 3 to re-enter the injection component 4, thus achieving material replenishment. In other words, in the above process, the first linkage control mechanism is responsible for material replenishment and the second linkage control mechanism is responsible for squeezing out the slurry in the first half of the rotation; in the second half of the rotation, the first linkage control mechanism is responsible for squeezing out the slurry and the second linkage control mechanism is responsible for material replenishment. The two squeezing actions are closely connected without interruption. The two linkage control mechanisms alternately execute the material replenishment and squeezing actions, cooperating with each other and operating continuously in a staggered manner. This ensures that the outlet of the injection component 4 can continuously output slurry while the traveling wheel 2 is continuously rotating, effectively preventing gaps in the filling of cracks due to untimely material replenishment or squeezing intervals, and achieving uniform and continuous crack repair.

[0029] Therefore, it can be seen that by using two staggered linkage control components 6, fully automatic synchronous operation of "automatic grout supply when walking and grout discharge when stopping" is achieved. Operators only need to push or pull the frame 1 along the crack to complete the repair without any manual operation of switches or squeezing action. This significantly reduces labor intensity, improves repair efficiency and quality, and solves the problem that existing floor crack repair devices are difficult to achieve synchronous control of walking and grout discharge, resulting in unstable repair quality and inconvenient operation.

[0030] See also Figure 1 and Figure 2 The storage container 3 includes two independently arranged storage cylinders 31; there are two switch components 5, which correspond one-to-one with the two storage cylinders 31 and the two linkage control components 6; the switch components 5 are set in their corresponding storage cylinders 31, and the switch components 5 are connected to the walking wheel 2 through their corresponding linkage control components 6.

[0031] Specifically, the storage container 3 adopts a dual-cylinder independent structure, namely a first storage cylinder 3101 and a second storage cylinder 3102. The two storage cylinders 31 are arranged side by side or one behind the other, and are not connected to each other, each storing slurry independently. Each storage cylinder 31 has a discharge port at its bottom or lower side for connecting to the filling assembly 4. Each storage cylinder 31 is equipped with an independent switch assembly 5, of which there are two: a first switch assembly 501 and a second switch assembly 502. The two switch assemblies 5 correspond one-to-one with the two storage cylinders 31 and the two linkage control mechanisms, and the two switch assemblies 5 are driven independently by their respective linkage control mechanisms. That is, the first switch assembly 501 is located in the first storage cylinder 3101 and is connected to the axle 21 of the traveling wheel 2 through the first linkage control mechanism; the second switch assembly 502 is located in the second storage cylinder 3102 and is connected to the axle 21 of the traveling wheel 2 through the second linkage control mechanism. The switch assembly 5 controls the connection between its corresponding storage cylinder 31 and the injection assembly 4. Simultaneously, when closed, it can squeeze the slurry inside the storage cylinder 31 to achieve slurry discharge and gap filling. In this embodiment, the switch assembly 5 can adopt a normally closed valve structure, which remains closed when not subjected to external force. The injection assembly 4 includes two independent feed channels and a common discharge port, or includes a manifold. The two independent feed channels are respectively connected to the first storage cylinder 3101 and the second storage cylinder 3102, merging the slurry input from the two storage cylinders 31 before outputting it.

[0032] See also Figures 3 to 4 The switch assembly 5 adopts a linkage structure between the piston plate 51 and the rotary switch cover 52. The switch assembly 5 includes: a piston plate 51 and a rotary switch cover 52; wherein, Piston plate 51 along the axial direction of storage cylinder 31 (e.g.) Figure 3 The piston plate 51 (shown in the vertical direction) is movably disposed inside the storage cylinder 31, and the piston plate 51 is connected to the power output end of the linkage control component 6. The linkage control component 6 is used to convert the rotation of the traveling wheel 2 into the reciprocating linear motion of the piston plate 51 along the axial direction of the storage cylinder 31, so as to squeeze the slurry below the piston plate 51 for feeding; wherein, the storage cylinder 31 stores slurry above the piston plate 51, and the bottom of the storage cylinder 31 is connected to the injection component 4.

[0033] Specifically, the piston plate 51 is slidably connected to the inner wall of the storage cylinder 31. Furthermore, the piston plate 51 and the inner wall of the storage cylinder 31 are in a sealed sliding connection; for example, a sealing ring can be installed on the outer periphery of the piston plate 51, or the piston plate 51 itself can be made of an elastic sealing material to prevent slurry leakage from the gap between the piston plate 51 and the cylinder wall of the storage cylinder 31. The piston plate 51 is connected to the power output end of the linkage control assembly 6. When the traveling wheel 2 rotates, the linkage control mechanism converts the rotational motion of the wheel axle 21 into the up-and-down reciprocating motion of the piston plate 51. Because the piston plate 51 is in a sealed sliding connection to the inner wall of the storage cylinder 31, when the piston plate 51 moves downward, the space below it is sealed and compressed, effectively squeezing the existing slurry in the bottom area and forcing the slurry to flow towards the injection assembly 4; when the piston plate 51 moves upward, the space below it is sealed and expanded, forming a stable negative pressure, which facilitates the downward replenishment of slurry from above while preventing air from being sucked in. Through this sealed reciprocating motion, the piston plate 51 serves as both a driving element for slurry conveying and a power source for subsequent switching actions, ensuring the reliability of extrusion and suction.

[0034] The rotary switch cover 52 is rotatably mounted on the piston plate 51. When the piston plate 51 moves downward, it is in the closed position, cutting off the communication between the space above the piston plate 51 and the bottom of the storage cylinder 31, thereby cutting off the communication between the upper space of the storage cylinder 31 and the injection assembly 4. It also works with the piston plate 51 to squeeze the slurry below the piston plate 51 downward, causing it to spray out from the injection assembly 4, so as to repair the crack by squeezing out the slurry. When the piston plate 51 moves upward, the space below the piston plate 51 becomes larger, and the rotary switch cover 52 rotates to the open position, so that the slurry above the piston plate 51 enters the bottom of the storage cylinder 31 from the rotary switch cover 52, thereby realizing bottom opening feeding.

[0035] Specifically, the piston plate 51 may be provided with multiple slurry inlet holes 511. In particular, the piston plate 51 is uniformly provided with several slurry inlet holes 511 around its circumference for controlling the slurry flow rate. The rotary switch cover 52 is mounted at the slurry inlet hole 511 via a hinge shaft and can rotate freely within a certain angle. In this embodiment, the rotary switch cover 52 is located below the piston plate 51, and the piston plate 51 can limit the closed position of the rotary switch cover 52. In this embodiment, the opening and closing of the rotary switch cover 52 is driven by the change in slurry pressure caused by the movement of the piston plate 51. In this embodiment, the rotary switch cover 52 is located below the piston plate 51, and an elastic reset member (not shown in the figure) is provided between the rotary switch cover 52 and the piston plate 51 to apply a reset force to the rotary switch cover 52 so that when the piston plate 51 moves downward, the rotary switch cover 52 can rotate to the closed position under the action of the reset force, preventing the slurry below from flowing back. Among them, the elastic reset component can be a torsion spring. The elasticity of the torsion spring should not be too large. It needs to ensure that the slurry can be pushed open and pass smoothly through the slurry inlet hole 511, and that the piston plate 51 can return to a position close to the slurry inlet hole 511 when it moves in the opposite direction, so as to effectively block the slurry inlet hole 511.

[0036] When the piston plate 51 moves upward, it squeezes the slurry above it, and the slurry exerts a downward force on the upper surface of the rotary switch cover 52, thereby driving the rotary switch cover 52 to rotate downward to the open position against its own weight or the force of the reset member. At this time, the slurry inlet hole 511 on the piston plate 51 is opened, and the slurry above the piston plate 51 quickly enters the bottom of the storage cylinder 31 from the rotary switch cover 52 under the combined action of gravity and the upward squeezing of the piston plate 51, realizing bottom opening feeding and replenishing slurry for the next extrusion.

[0037] When the piston plate 51 moves downward or stops moving, the slurry pressure on the rotary switch cover 52 disappears or decreases. The reset force applied by the elastic reset member drives the rotary switch cover 52 to automatically reset and rotate to the closed position. At this time, the rotary switch cover 52 completely covers the slurry inlet hole 511 on the piston plate 51, cutting off the connection between the space above the piston plate 51 and the bottom of the storage cylinder 31, thereby cutting off the connection between the upper space of the storage cylinder 31 and the injection assembly 4. The piston plate 51 continues to move downward, squeezing the slurry below it, forcing the slurry to be ejected from the injection assembly 4, thus completing the crack repair by squeezing out the slurry. More importantly, when the rotary switch cover 52 is in the closed position, it can effectively prevent the slurry below the piston plate 51 from flowing back upward to the space above the piston plate 51 when it is squeezed downward, thereby ensuring that the downward squeezing pressure is all applied to the bottom slurry, allowing it to be smoothly ejected from the injection assembly 4, thus completing the crack repair by squeezing out the slurry.

[0038] When the piston plate 51 stops moving, the elastic reset member also keeps the rotary switch cover 52 in the closed position to prevent slurry backflow or accidental leakage.

[0039] The rotary switch cover 52, driven by slurry pressure, achieves a reliable linkage of "automatic opening during upward feeding and automatic closing during downward extrusion," eliminating the need for additional transmission components. This results in a simple structure and reliable operation. Furthermore, the closed state features a check valve, effectively preventing backflow and ensuring continuous and stable slurry output. Additionally, the piston plate 51 seals against the cylinder wall, preventing slurry leakage or air ingress during extrusion and suction, thus ensuring continuous slurry output and repair quality.

[0040] See also Figures 3 to 4 The linkage control component 6 includes: an axis conversion component 61 and a motion conversion component 62; wherein, The power input end of the axis conversion component 61 is connected to the axle 21 of the walking wheel 2, and is used to rotate synchronously with the axle 21 of the walking wheel 2.

[0041] Specifically, to make the overall structure of the linkage control component 6 compact, the axis conversion component 61 is used to transmit the rotation of the axle 21 of the traveling wheel 2 to the motion conversion component 62 while keeping the rotation axes parallel. For example, the axis conversion component 61 can use a set of parallel transmission shafts to transmit the rotational motion of the axle 21 of the traveling wheel 2 to a position near the storage cylinder 31 through a gear pair, synchronous belt pulley, or chain sprocket, thereby reducing the lateral distance of the power transmission path and making the device structure more compact. The power output end of the first axis conversion component 6101 is connected to the input end of the second motion conversion component 6202, and their rotation axes are parallel to each other. In addition, by selecting different transmissions, such as large and small gear meshing, the output speed can be adjusted, thereby controlling the reciprocating frequency of the piston plate 51. In this embodiment, the two axis conversion components 61 in the two linkage control components 6 are arranged in a synchronous and unidirectional motion linkage. That is, the first axis conversion component 6101 of the first linkage control component 601 and the second axis conversion component 6102 of the second linkage control component 602 are arranged in a synchronous and unidirectional motion linkage. In other words, the first axis conversion component 6101 of the first linkage control component 601 and the second axis conversion component 6102 of the second linkage control component 602 move synchronously and in the same direction. The power input ends of both are connected to the wheel axle 21. The two have the same structure and are arranged side by side. Since they are connected to the same power input, their power output ends move synchronously.

[0042] The power input end of the motion conversion component 62 is connected to the power output end of the axis conversion component 61, and the power output end is connected to the piston plate 51. It is used to convert the output rotation of the axis conversion component 61 into the reciprocating linear motion of the piston plate 51 along the axial direction of the storage cylinder 31.

[0043] Specifically, the motion conversion component 62 can be a crank-connecting rod mechanism, a cam mechanism, an eccentric wheel mechanism, or a lead screw and nut mechanism, etc. Taking the crank-connecting rod mechanism as an example: the output end of the axis conversion component 61 drives a crank to rotate, and the crank is hinged to the piston plate 51 through a connecting rod. The continuous rotation of the crank is converted into the reciprocating linear motion of the piston plate 51 along the axial direction of the storage cylinder 31. Taking the cam mechanism as an example: the output end of the first axis conversion component 6101 drives a cam to rotate, and the cam profile pushes the follower, i.e., the push rod, to move up and down. The follower is fixedly connected to the piston plate 51. By designing the profile shape of the cam, the speed, stroke, and dwell time of the piston plate 51 moving upward (feeding) and downward (squeezing out) can be precisely controlled, thereby matching the action sequence of another linkage control mechanism. Regardless of the form used, the function of the second motion conversion component 6202 is to convert the continuous rotational motion into the periodic reciprocating linear motion of the piston plate 51, driving the piston plate 51 to alternately complete the actions of upward feeding and downward squeezing out.

[0044] In this embodiment, the two motion conversion components 62 are arranged in opposite directions and linked together, so that when the power output end of one motion conversion component 62 moves upward, the power output end of the other motion conversion component 62 moves downward, so that the two storage cylinders 31 can respectively open the bottom for feeding and squeeze out the slurry when the walking wheel 2 moves.

[0045] Specifically, the two motion converters 62, namely the first motion converter 6201 of the first linkage control component 601 and the second motion converter 6202 of the second linkage control component 602, achieve opposite-phase movements through a common drive source, namely the axle 21 of the walking wheel 2, in conjunction with the transmission relationship between the first axis converter 6101 of the first linkage control component 601 and the second axis converter 6102 of the second linkage control component 602. For example, when the walking wheel 2 rotates, the first axis converter 6101 transmits power to the first motion converter 6201, while the second axis converter 6102 transmits power to the second motion converter 6202. By setting an initial phase difference between the two motion converters 62, for example through misaligned gears or misaligned cam profiles, the direction of motion of the power output end of the first motion converter 6201 is always opposite to the direction of motion of the power output end of the second motion converter 6202. When the first motion conversion component 6201 drives the piston plate 51 inside the first storage cylinder 3101 to move upward, the first storage cylinder 3101 opens at the bottom to feed material, i.e., replenishes material. When the second motion conversion component 6202 drives the piston plate 51 inside the second storage cylinder 3102 to move downward, the second storage cylinder 3102 squeezes out slurry and discharges material, i.e., discharges slurry. Conversely, when the first motion conversion component 6201 drives the piston plate 51 to move downward, the first storage cylinder 3101 squeezes out slurry, and the second motion conversion component 6202 drives the piston plate 51 inside the second storage cylinder 3102 to move upward, the second storage cylinder 3102 replenishes material. Thus, during the continuous rotation of the traveling wheel 2, the two storage cylinders 31 alternately complete the feeding and extrusion of slurry, and the feeding and extrusion actions are closely linked in sequence. That is, when the first storage cylinder 3101 is fed, the second storage cylinder 3102 is extruded; when the first storage cylinder 3101 is extruded, the second storage cylinder 3102 is fed. This reverse motion linkage arrangement ensures that slurry is always being extruded from the outlet, realizing truly continuous and uninterrupted crack repair, and effectively avoiding the problem of slurry interruption caused by the need for feeding a single storage cylinder 31.

[0046] Through the cooperation of the aforementioned axis conversion component 61 and motion conversion component 62, the linkage control mechanism can reliably convert the rotation of the traveling wheel 2 into the reciprocating linear motion of the piston plate 51, providing a stable power foundation for the staggered alternating operation of the two linkage control mechanisms.

[0047] In this embodiment, both motion conversion components 62 are crank-connecting rod mechanisms, and their motion phases differ by 180 degrees, so that the motion directions of their power output ends are opposite.

[0048] Specifically, the motion conversion component 62 is a crank-connecting rod mechanism, which includes a crank and a connecting rod. The rotation center of the crank is fixedly connected to the output end of the axis conversion component 61, i.e., the driven shaft where the driven wheel 612 is located. The first end of the connecting rod is hinged to the connecting end of the crank, and the other end is hinged to the piston plate 51 inside the storage cylinder 31.

[0049] Since the driven wheels 612 of the two axis conversion components 61 are coaxially arranged, sharing a single driven shaft, both crank components are mounted on the same driven shaft. By offsetting the mounting angles of the two crank components by 180 degrees, i.e., their initial phase angles differ by 180 degrees, when the driven shaft rotates, the two crank components always maintain opposite motion phases. Figure 5 As shown, the first crank component (such as...) Figure 5 When the left crank component (as shown) is at its lowest point, the second crank component (such as...) Figure 5 The right crank (shown in the diagram) is at its lowest point; both cranks rotate in the same direction, but forward and backward respectively. Therefore, the piston plate 51 driven by the first connecting rod and the other piston plate 51 driven by the second connecting rod always move in opposite directions. That is, when the piston plate 51 in the first storage cylinder 3101 moves upward (replenishing material), the piston plate 51 in the second storage cylinder 3102 moves downward (extruding slurry); and vice versa. This crank-connecting rod mechanism with a 180-degree phase difference has a simple structure and reliable transmission, enabling precise and continuous operation of alternating feeding and slurry discharge from the two storage cylinders 31. This ensures that slurry is extruded from the outlet every half revolution of the traveling wheel 2, achieving uninterrupted crack repair.

[0050] In this embodiment, both motion conversion components 62, namely the first motion conversion component 6201 and the second motion conversion component 6202, are linkage structures. The first ends of the two motion conversion components 62 are respectively hinged to the two driven wheels 612, and the second ends of the two motion conversion components 62 are respectively hinged to the two piston plates 51 (i.e., the piston plate 51 in the first storage cylinder 3101 and the piston plate 51 in the second storage cylinder 3102), so that the motion conversion components 62, together with the driven wheels 612 of the axis conversion component 61, form a crank-connecting rod mechanism. The first ends of the two motion conversion components 62, i.e. the hinge points of the two connecting rod structures and the driven wheel 612, are arranged 180° opposite each other on the same radial direction of the driven wheel 612. The radial distances from the two first ends to the driven wheel shaft 21 are equal, that is, the two driven wheels 612 are coaxially arranged and rotate synchronously. The first ends of the two motion conversion components 62 are respectively arranged on the two driven wheels 612. The first ends of the two motion conversion components 62 are located on the same radial direction projected in the same plane perpendicular to the axis and point in opposite directions. The distances from the first ends of the two motion conversion components 62 to the axis are equal.

[0051] Specifically, two driven wheels 612 are coaxially fixedly connected, forming a crank disc. The central axis of this crank disc is parallel to the rotation axis of the traveling wheel 2, and a fixed transmission ratio is maintained by a synchronous belt drive. The first ends of the two connecting rod structures, namely the second motion conversion components 6202, are respectively mounted on the crank disc via hinge shafts. The two hinge points are located on the same radial line of the crank disc and are located on opposite sides of the center, i.e., 180° out of phase. The two cranks are visible. Figure 5 At the location indicated by the red line, the radial distances from the two hinge points to the crankshaft axis are equal; this distance is the crank radius. The second ends of the two connecting rod structures are respectively hinged to the piston plates 51 inside the two storage cylinders 31. In this embodiment, a vertical lifting rod 512 is provided below the piston plate 51, with its top end fixedly connected to the piston plate 51, especially at the center of the piston plate 51, and its bottom end can be hinged to the second end of the connecting rod mechanism. In this embodiment, the bottom of the storage cylinder 31 is provided with a concave telescopic cavity 311; to reduce the residual amount at the bottom of the storage cylinder 31, the telescopic cavity 311 can be extended to be consistent with the bottom space of the storage cylinder 31; or the telescopic cavity 311 can be at least 0 meters high, that is, the driven pulley is set downwards as a whole, thereby leaving enough space for rotation control of lifting and lowering, while ensuring that the residual amount of slurry is as small as possible.

[0052] When the crank disc rotates synchronously with the driven wheel 612, the first ends of the two connecting rod structures, namely the crank pins, move in a circular motion with the same radius but opposite phases. Since the two hinge points are in opposite phases, when one crank pin is at its highest point, the other must be at its lowest point. Therefore, the two connecting rod structures drive the two piston plates 51 to reciprocate linear motion, and the directions of motion are always opposite: when one piston plate 51 moves upward, the other piston plate 51 moves downward. The piston plate 51 moving upward opens the rotary switch cover 52 due to the pressure of the slurry on its upper side, allowing slurry to be fed through the slurry inlet hole 511. The piston plate 51 moving downward closes the rotary switch cover 52 to expel slurry. As the crank disc rotates continuously, the two piston plates 51 alternately complete the feeding and expelling of slurry, and the slurry expulsion action is always present during the rotation process, thereby ensuring a continuous and uniform output of slurry from the slurry outlet.

[0053] This structure, which uses two connecting rods to share a single crankshaft and has their hinge points arranged at 180° relative to each other, greatly simplifies the transmission system. It can precisely achieve the reverse motion linkage of the two piston plates 51 without the need for additional gears or cam mechanisms. The structure is compact, low-cost, and highly reliable.

[0054] See also Figure 3 Both axis conversion components 61 are synchronous belt pulley structures. The two driving wheels 611 of the two axis conversion components 61 are arranged coaxially and are both set on the wheel axle 21 of the traveling wheel 2. The two driven wheels 612 of the two axis conversion components 61 are arranged coaxially for synchronous rotation.

[0055] Specifically, the first axis conversion component 6101 includes a first driving wheel 611 and a first driven wheel 612. The first driving wheel 611 is fixedly mounted on the axle 21 of the traveling wheel 2. The first driven wheel 612 is connected to the first driving wheel 611 via a synchronous belt (not shown in the figure) and is mounted on a first driven shaft. The second axis conversion component 6102 includes a second driving wheel 611 and a second driven wheel 612. The second driving wheel 611 is also fixedly mounted on the axle 21 of the traveling wheel 2 and is arranged coaxially with the first driving wheel 611. The second driven wheel 612 is connected to the second driving wheel 611 via a synchronous belt and is arranged coaxially with the first driven wheel 612, i.e., mounted on the same driven shaft. Since the two driving wheels 611 share the same rotating shaft, namely the shaft of the traveling wheel 2, and the two driven wheels 612 share the same driven shaft, when the traveling wheel 2 rotates, the two driving wheels 611 rotate synchronously, which in turn drives the two driven wheels 612 to rotate synchronously via a synchronous belt. This coaxial synchronous arrangement ensures that the rotational motion output by the two axis conversion components 61 has a definite identical relationship in terms of speed and phase, providing a stable power foundation for the subsequent motion conversion components 62. At the same time, the synchronous belt pulley structure has advantages such as smooth transmission, no slippage, compact structure, and convenient maintenance, making it particularly suitable for applications where the transmission distance between the shaft of the traveling wheel 2 and the storage cylinder 31 needs to be reduced.

[0056] In this embodiment, the specific implementation of the linkage control mechanism is not limited to crank connecting rod, but can also be a mechanical cam, eccentric wheel or gear rack and other transmission structures. As long as the rotational motion of the traveling wheel 2 can be converted into the opening / closing action of the switch component 5 and the squeezing / releasing action of the injection component 4, and the two actions are out of sequence, they all fall within the protection scope of this application.

[0057] The switching assembly 5 is not limited to the normally closed valve mentioned above. It can also be a solenoid valve in conjunction with the electrical trigger. However, mechanical linkage has the advantages of simple structure, high reliability and no need for external power supply, which is the preferred solution of the present invention.

[0058] In summary, the floor crack repair device provided in this embodiment, by setting up a linkage control mechanism that is connected to the drive wheel 2 and cooperating with the switch assembly 5, achieves a direct correlation between the rotation state of the drive wheel 2 and the opening and closing of the switch assembly 5. In particular, through two staggered linkage control assemblies 6, fully automatic synchronous operation of "automatic grout supply when walking and stopping grout discharge when stopping" is achieved. The operator only needs to push or pull the frame 1 along the crack to complete the repair, without any manual operation of the switch or squeezing action, which significantly reduces labor intensity, improves repair efficiency and quality, and solves the problem of unstable repair quality and inconvenient operation caused by the difficulty in achieving synchronous control of walking and grout discharge in existing floor crack repair devices.

[0059] Furthermore, by setting the switch assembly 5 as a linkage structure between the piston plate 51 and the rotary switch cover 52, the up-and-down movement of the piston plate 51 drives the opening and closing of the rotary switch cover 52, and coordinates with the squeezing action of the piston plate 51 to complete the feeding and discharging of pulp. By setting two linkage control mechanisms arranged 180° apart and two independent storage cylinders 31, the piston plates 51 in the two storage cylinders 31 alternately perform upward feeding and downward squeezing to discharge pulp. The combined effect of the above structures enables the device to automatically turn on the switch and squeeze to discharge pulp when moving, and automatically turn off the switch and stop discharging pulp when stopping, realizing fully automatic synchronous operation of "discharging pulp as soon as it moves, and stopping pulp as soon as it stops".

[0060] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0061] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 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 can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A floor crack repair device, characterized in that, include: Frame; The vehicle has wheels located at the bottom of the frame to propel it on the ground. A storage container, mounted on the frame, is used to store slurry; The injection assembly is connected to the storage container, and a switch assembly is provided between the storage container and the injection assembly to control the connection and disconnection between the storage container and the injection assembly, so as to output the slurry to the ground crack through the injection assembly; Two staggered, interconnected control components are provided. Both control components are connected to the traveling wheel and the switch assembly. When the traveling wheel rotates, one control component drives the switch assembly to open, connecting the storage container to the injection assembly. The other control component squeezes the slurry in the injection assembly to output slurry, thus repairing the crack. The injection assembly is alternately replenished and squeezed out. When the traveling wheel stops rotating, the control component drives the switch assembly to close, stopping the squeezing of the slurry in the injection assembly and stopping the slurry output.

2. The floor crack repair device according to claim 1, characterized in that, The storage container includes two independently arranged storage cylinders; there are two switch assemblies, each corresponding to one of the two storage cylinders and one of the two linkage control assemblies; the switch assembly is located in its corresponding storage cylinder, and the switch assembly is connected to the walking wheel via its corresponding linkage control assembly.

3. The floor crack repair device according to claim 2, characterized in that, The switching assembly includes: A piston plate is movably disposed inside the storage cylinder along its axial direction. The piston plate is connected to the power output end of the linkage control component, which converts the rotation of the traveling wheel into reciprocating linear motion of the piston plate along the axial direction of the storage cylinder to extrude the slurry below the piston plate. The storage cylinder stores slurry above the piston plate, and the bottom of the storage cylinder is connected to the injection component. A rotary switch cover is rotatably mounted on the piston plate. When the piston plate moves downward, it is in a closed position, cutting off the communication between the space above the piston plate and the bottom of the storage cylinder, thus cutting off the communication between the upper space of the storage cylinder and the injection assembly. It also works in conjunction with the piston plate to squeeze the slurry below the piston plate downward, causing it to spray out from the injection assembly, thereby repairing cracks by squeezing out the slurry. When the piston plate moves upward, the space below the piston plate expands, and the rotary switch cover rotates to an open position, allowing the slurry above the piston plate to enter the bottom of the storage cylinder through the rotary switch cover, thus achieving bottom-opening feeding.

4. The floor crack repair device according to claim 3, characterized in that, The linkage control component includes: An axis conversion component, with its power input end connected to the axle of the traveling wheel, is used to rotate synchronously with the axle of the traveling wheel; The motion conversion component has its power input end connected to the power output end of the axis conversion component, and its power output end connected to the piston plate. It is used to convert the output rotation of the axis conversion component into the reciprocating linear motion of the piston plate along the axial direction of the storage cylinder.

5. The floor crack repair device according to claim 4, characterized in that, The two axis conversion components in the two linkage control components are arranged to move synchronously in the same direction, and the two motion conversion components are arranged to move in opposite directions. When the power output end of one motion conversion component moves upward, the power output end of the other motion conversion component moves downward, so that the two storage cylinders can respectively open at the bottom for feeding and squeeze out slurry for discharging when the walking wheel moves.

6. The floor crack repair device according to claim 5, characterized in that, Both of the aforementioned motion conversion components are crank-connecting rod mechanisms, and their motion phases differ by 180 degrees, so that the motion directions of their power output ends are opposite.

7. The floor crack repair device according to claim 6, characterized in that, Both of the aforementioned axis conversion components are synchronous belt pulley structures. The two driving pulleys of the two aforementioned axis conversion components are arranged coaxially and are both mounted on the axle of the traveling wheel. The two driven pulleys of the two aforementioned axis conversion components are arranged coaxially for synchronous rotation. Both of the motion conversion components are linkage structures. The first ends of the two motion conversion components are respectively hinged to the two driven wheels, and the second ends are respectively hinged to the two piston plates, so that the motion conversion components and the driven wheels of the axis conversion component form a crank-connecting rod mechanism. The first ends of the two motion conversion elements are arranged 180° opposite each other in the same radial direction of the driven wheel, and the radial distances from the two first ends to the axis of the driven wheel are equal.

8. The floor crack repair device according to claim 3, characterized in that, The rotary switch cover is located below the piston plate, and an elastic reset member is provided between the rotary switch cover and the piston plate to apply a reset force to the rotary switch cover so that when the piston plate moves downward, the rotary switch cover can rotate to the closed position under the action of the reset force to prevent the slurry below from flowing back.

9. The floor crack repair device according to any one of claims 1 to 8, characterized in that, The vehicle has two wheels, which are arranged coaxially and longitudinally along the bottom sides of the frame. An auxiliary wheel is provided on one side of each of the two traveling wheels, and its longitudinal position is between the two traveling wheels; The grouting assembly has a grout outlet, which is positioned at the same longitudinal position as the auxiliary wheel on the vehicle frame, so that the grout outlet discharges grout along the travel trajectory of the auxiliary wheel.

10. The floor crack repair device according to claim 9, characterized in that, Both the traveling wheels and the auxiliary wheels are swivel wheels.

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