A reel device for use in a wall-mounted cleaning apparatus

Abstract

The application provides a take-up and pay-off device arranged in a wall-mounted cleaning device, comprising a winding wheel disc assembly, a driving mechanism and a limiting mechanism. The winding wheel disc assembly is rotatably sleeved on a fixed shaft, and the limiting mechanism extends into the winding wheel disc through a mounting base and comprises two sets of transmission wheels and an elastic top pressure clutch structure. When winding, the torsion is lower than a critical value, the transmission wheels are synchronously rotated to realize electric winding, and when paying off or winding to a position, the resistance exceeds the critical value, the transmission wheels slip to cut off the power path. The application can effectively reduce the motor reverse resistance when manually paying off, realize adjustable tension and winding overload protection, has compact and adaptive wall-mounted structure, and improves the use convenience and reliability of the cleaning device.

Description

Technical Field

[0001] This invention relates to the field of winding reel technology, and more specifically to a winding and unwinding device placed inside a wall-mounted cleaning device. Background Technology

[0002] Cleaning equipment is widely used in both civilian and commercial settings. Traditional cleaning equipment is mostly mobile and its power cord or cleaning cable (hereinafter referred to as cable) configuration presents a dilemma: if the cable is too short, it will limit the equipment's operating radius; if the cable is too long, it will easily drag on the ground, become tangled, or get knotted during use, affecting the convenience of operation, increasing cable wear, and increasing the risk of people tripping. After use, manually tying up longer cables is cumbersome, and they are also prone to becoming loose and messy after storage.

[0003] In addition, mobile ground cleaning equipment occupies ground space when not in use, which is not conducive to storage in places with limited space.

[0004] To address these issues, wall-mounted cleaning equipment is gradually becoming the future trend. By wall-mounting the main unit, floor space is freed up, and the problem of cables dragging on the floor is alleviated. However, the cable winding and unwinding structures in existing wall-mounted cleaning equipment still have shortcomings. Some existing cable winding and unwinding devices use a structure where the motor and cable reel are directly connected for transmission. While the motor can control the winding, manually pulling the cable causes the reel to rotate synchronously in the opposite direction. The motor's own damping torque and the frictional resistance of the transmission system translate into significant pulling resistance, making manual cable unwinding difficult, and sometimes even resulting in the cable being impossible to pull out smoothly. Simultaneously, this significant pulling resistance also exerts a continuous pulling force on the wall-mounted equipment, easily causing displacement, loosening of the installation, and affecting operational stability and safety.

[0005] Therefore, the existing cord winding and unwinding structures of cleaning equipment cannot simultaneously meet the requirements of stable electric cord winding and low resistance manual cord unwinding. In particular, the lack of mature, reliable, and tension-controllable cord winding and unwinding solutions in wall-mounted cleaning equipment has hindered the promotion and application of wall-mounted cleaning equipment. Summary of the Invention

[0006] The present invention was made to solve the above-mentioned problems, and its purpose is to provide a cord retraction and extension device that can be placed in a wall-mounted cleaning device.

[0007] This invention provides a cable winding and unwinding device placed inside a wall-mounted cleaning device. The device is located within a closed cavity of the cleaning device and includes a winding reel assembly, a drive mechanism, and a limiting mechanism. It is characterized by the following features: A fixed shaft is fixedly installed inside the enclosed cavity, and the winding wheel assembly is rotatably mounted on the fixed shaft for winding and unwinding cables; The limiting mechanism is fixed to the stationary base of the cleaning equipment by a mounting base and extends entirely into the internal cavity of the winding wheel assembly. A support shaft is provided on the mounting base. The limiting mechanism includes a first driven drive wheel, a second driven drive wheel, an elastic pressing component, and a limiting fitting component. Both the first and second driven drive wheels are rotatably mounted on the support shaft. The first driven drive wheel is connected to the drive mechanism, and the second driven drive wheel is engaged with the inner ring of the winding wheel assembly. At least one set of elastic pressing components is arranged circumferentially on the end face of the first driven drive wheel facing the second driven drive wheel. The elastic pressing component includes an elastic element and a pressing element. The elastic element is arranged axially, with one end abutting against the first driven drive wheel and the other end abutting against the pressing element. A limiting fitting component is fixedly provided on the end face of the second driven drive wheel facing the first driven drive wheel. The limiting fitting component has a limiting groove adapted to the pressing element on the end face of the first driven drive wheel. In the take-up state, the torque output by the drive mechanism is less than the critical transmission force of the elastic pressing component. The pressing component is fitted into the limiting groove. The first driven transmission wheel drives the second driven transmission wheel to rotate synchronously through the elastic pressing component and the limiting component, thereby driving the winding wheel assembly to perform take-up. In the unwinding or take-up state, the resistance experienced by the second driven transmission wheel is greater than the critical transmission force. The pressing component compresses the elastic component and disengages from the limiting groove. The first driven transmission wheel and the second driven transmission wheel slip relative to each other, cutting off the power transmission path.

[0008] Furthermore, the drive mechanism includes a drive motor, a drive pulley, and a synchronous belt. The drive motor is housed within a protective housing, with its output end extending outside the protective housing. The drive pulley is fixed to the exposed section of the output end, and the synchronous belt is sleeved between the drive pulley and the first driven transmission pulley.

[0009] Furthermore, the drive motor is a wirelessly remote-controlled drive motor.

[0010] Furthermore, the winding wheel assembly includes a winding wheel body and an internal gear ring fixed to the inner wall of the winding wheel body. The internal gear ring meshes with the external teeth of the second driven transmission wheel, and the cable is wound around the outer periphery of the winding wheel body.

[0011] Furthermore, multiple sets of elastic pressing components are provided, and the multiple sets of elastic pressing components are evenly distributed along the circumference of the first driven transmission wheel.

[0012] Furthermore, the first driven transmission wheel has an axially penetrating mounting hole, and a lower cover plate is fixedly connected to the side of the first driven transmission wheel away from the second driven transmission wheel. The lower cover plate has a blind hole corresponding to the mounting hole. One end of the elastic member is accommodated in the blind hole, and the other end passes through the mounting hole and abuts against the top pressing member.

[0013] Furthermore, the cleaning equipment includes at least two mounting plates arranged opposite each other, and multiple enclosure plates that can cooperate with the two mounting plates to form a closed receiving cavity. The inner walls of the two mounting plates are provided with corresponding protruding mounting seats, and the opposite end faces of the two protruding mounting seats are provided with shaft mounting grooves. The two ends of the fixed shaft are respectively fixedly installed in the shaft mounting grooves on the corresponding sides, and the mounting base is fixed to the mounting plate.

[0014] Furthermore, a top cover plate is provided on the side of the second driven transmission wheel away from the first driven transmission wheel, and a fixing plate is provided between the top cover plate and the mounting base. The fixing plate is fixedly connected to the mounting base and is used to axially limit the transmission components of the limiting mechanism.

[0015] Furthermore, a first bearing is provided between the first driven transmission wheel and the support shaft, a second bearing is provided between the second driven transmission wheel and the support shaft, and a connecting bushing is provided between the first bearing and the second bearing.

[0016] Furthermore, the top pressure component is a steel ball, and the elastic component is a compression spring. By adjusting the pre-compression amount of the compression spring, the critical transmission force can be adjusted, thereby adjusting the magnitude of the tension during the wire feeding operation.

[0017] The role and effect of invention According to the present invention, a cable reeling and unwinding device installed in a wall-mounted cleaning device, by setting a limiting mechanism with torque clutch function inside the winding reel assembly, and relying on the interlocking and slipping structure of the elastic pressing component and the limiting fitting, synchronous transmission can be maintained when the cable reeling torque is below a critical value, ensuring stable operation of the electric cable reeling. When the resistance increases during manual cable reeling or when the cable reeling reaches its final position, the power transmission path is automatically cut off, preventing the motor from reversing with the winding reel, fundamentally reducing the tension during cable reeling, and simultaneously achieving overload protection during cable reeling, extending the service life of the motor. The device can flexibly adjust the critical transmission force by adjusting the pre-compression amount of the elastic component to adapt to different tensile force requirements. The overall structure is built into the winding reel, with a compact layout, suitable for the narrow installation space of wall-mounted cleaning devices, effectively improving the stability and ease of use of the equipment. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the present invention from a first perspective; Figure 2 This is a structural schematic diagram of the invention from a second perspective; Figure 3 This is a first-view structural schematic diagram of some of the driving mechanisms and limiting mechanisms in this invention; Figure 4 This is a schematic diagram of the structure of some of the driving mechanisms and limiting mechanisms in this invention from a second perspective; Figure 5 This is a schematic diagram of the limiting mechanism in this invention; Figure 6 This is an exploded view of the limiting mechanism in this invention from a first-person perspective; Figure 7 This is an exploded view of the limiting mechanism in this invention from a second perspective.

[0019] Explanation of reference numerals in the attached figures: 10. Winding wheel assembly; 11. Winding wheel body; 12. Internal gear ring; 20. Drive mechanism; 21. Drive motor; 22. Drive pulley; 23. Synchronous belt; 30. Limiting mechanism; 31. First driven transmission wheel; 311. Mounting through hole; 32. Second driven transmission wheel; 33. Elastic pressing assembly; 331. Elastic element; 332. Pressing element; 34. Limiting mating element; 341. Limiting groove; 35. Lower cover plate; 36. Upper cover plate; 37. Fixing plate; 40. Protective housing; 50. Mounting base; 51. Support shaft; 60. First bearing; 70. Second bearing; 80. Connecting bushing; 90. Limiting element. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easy to understand, the invention will be described in detail below with reference to the accompanying drawings.

[0021] like Figures 1 to 7 As shown in the figure, the cord winding and unwinding device provided in this embodiment is built into the body of the wall-mounted cleaning equipment and is integrated with the power input structure of the equipment. It is used to realize the automatic winding and manual unwinding of the power cord and maintain the stable conduction of the power supply path throughout the winding and unwinding process.

[0022] The wall-mounted cleaning device includes two mounting plates arranged opposite each other, and multiple enclosure plates that can cooperate with the two mounting plates to form a closed receiving cavity. The inner walls of the two mounting plates are provided with corresponding protruding mounting seats, and the opposite end faces of the two protruding mounting seats are provided with shaft mounting grooves. A fixed shaft is provided in the closed receiving cavity, and the two ends of the fixed shaft are respectively fixedly installed in the shaft mounting grooves on the corresponding sides, providing a stable rotation support base for the winding wheel assembly 10.

[0023] The winding reel assembly 10 is rotatably mounted on a fixed shaft, including a winding reel body 11 and an internal gear ring 12 fixed to the inner wall of the winding reel body 11. A cable is wound around the outer circumference of the winding reel body 11. In this embodiment, the cable is a power supply cable. A limiting member 90 is provided at the extended end of the cable. The outer diameter of the limiting member 90 is larger than the inner diameter of the cable outlet on the cleaning equipment housing, which is used to prevent the cable from completely retracting into the equipment during the winding process, ensuring that subsequent cable unwinding operations can be carried out normally. A conductive slip ring is coaxially mounted on the fixed shaft. The conductive slip ring is a conventional rotary electrical connection device in the field of cable reels. The inner end of the cable is electrically connected to the rotating side of the conductive slip ring, and the fixed side of the conductive slip ring is electrically connected to the power input terminal of the cleaning equipment. This ensures that the cable maintains stable conductivity with the external power supply circuit throughout the entire process of winding and unwinding with the rotation of the winding reel, forming a complete power connection path.

[0024] The drive mechanism 20 is independently housed within a closed cavity and includes a protective housing 40, a drive motor 21, a drive pulley 22, and a synchronous belt 23. The drive motor 21 is housed within the protective housing 40, with its output end extending outside the housing 40. The drive pulley 22 is fixed to the exposed section of the output end. The synchronous belt 23 is fitted between the drive pulley 22 and the first driven transmission wheel 31 of the limiting mechanism 30, smoothly transmitting motor power to the limiting mechanism 30. In this embodiment, the drive motor 21 is a wirelessly remote-controlled drive motor, which can be controlled to start, stop, and rotate forward and backward via an external remote control signal, eliminating the need for close-range operation and improving ease of use.

[0025] The limiting mechanism 30 is fixed to the mounting plate by the mounting base 50 and extends entirely into the internal cavity of the winding wheel assembly 10. A support shaft 51 is provided on the side of the mounting base 50 facing the winding wheel assembly 10. The first driven transmission wheel 31 and the second driven transmission wheel 32 are rotatably mounted on the support shaft 51. The first driven transmission wheel 31 is located close to the mounting base 50, and the second driven transmission wheel 32 is located facing the inner end face of the winding wheel. The external teeth of the second driven transmission wheel 32 mesh with the internal gear ring 12 on the inner wall of the winding wheel body 11 to form a deceleration transmission path.

[0026] The first driven transmission wheel 31 has multiple axially penetrating mounting holes 311 circumferentially formed on its end face facing the second driven transmission wheel 32. A lower cover plate 35 is fixedly connected to the side of the first driven transmission wheel 31 away from the second driven transmission wheel 32. The lower cover plate 35 has blind holes corresponding to the positions of each mounting hole 311. Each set of elastic pressing components 33 is provided with one mounting hole 311 and one blind hole, including an elastic element 331 and a pressing element 332. In this embodiment, the elastic element 331 is preferably a compression spring, and the pressing element 332 is preferably a steel ball. One end of the compression spring is housed in the blind hole, and the other end passes through the mounting hole 311 and abuts against the steel ball. Multiple sets of elastic pressing components 33 are evenly distributed circumferentially along the first driven transmission wheel 31 to ensure balanced force during transmission and avoid uneven load jamming.

[0027] A limiting fitting 34 is fixedly provided on the end face of the second driven transmission wheel 32 facing the first driven transmission wheel 31. The limiting fitting 34 has a limiting groove 341 on the end face of the first driven transmission wheel 31 that is adapted to the steel ball. In the natural state, the elastic force of the compression spring pushes the steel ball to partially engage in the limiting groove 341, forming a transmission fit that can transmit torque. A top cover plate 36 is provided on the side of the second driven transmission wheel 32 away from the first driven transmission wheel 31. A fixing plate 37 is provided between the top cover plate 36 and the mounting base 50. The fixing plate 37 is fixedly connected to the mounting base 50 and is used to axially limit the transmission components of the limiting mechanism 30 to prevent the transmission wheel from moving axially along the support shaft 51 and to ensure transmission accuracy.

[0028] A first bearing 60 is provided between the center hole of the first driven transmission wheel 31 and the support shaft 51, and a second bearing 70 is provided between the center hole of the second driven transmission wheel 32 and the support shaft 51. A connecting bushing 80 is provided between the first bearing 60 and the second bearing 70 to separate the two bearings and ensure the stability of the rotation support, reduce the frictional resistance when the transmission wheel rotates, and improve the smoothness of transmission.

[0029] The working process of this device is as follows: In the winding state, the drive motor 21 receives a signal and starts, driving the first driven transmission wheel 31 to rotate through the active pulley 22 and the synchronous belt 23. At this time, the torque output by the motor is less than the critical transmission force of the elastic pressing component 33, and the steel ball is stably embedded in the limiting groove 341. The first driven transmission wheel 31 drives the second driven transmission wheel 32 to rotate synchronously through the steel ball and the limiting fitting 34. The second driven transmission wheel 32 drives the winding wheel body 11 to rotate around the fixed axis through the meshing of the gear ring, and orderly winds the power supply line onto the winding wheel body 11. During the winding process, the conductive slip ring continuously maintains the electrical conduction between the rotating side and the fixed side, without interrupting the power supply connection. In manual cable feeding mode, external force pulls the cable, causing the winding wheel 11 to rotate in the opposite direction. This, in turn, drives the second driven transmission wheel 32 to rotate in the opposite direction via the internal gear ring 12. At this time, the resistance generated by pulling the cable is greater than the critical transmission force of the elastic pressing component 33. The steel ball compresses the spring and disengages from the limiting groove 341. Relative slippage occurs between the first driven transmission wheel 31 and the second driven transmission wheel 32, cutting off the transmission path on the motor side. The winding wheel does not need to drive the motor to rotate in the opposite direction, significantly reducing the resistance to pulling the cable and achieving easy cable feeding. During the cable feeding process, the conductive slip ring also maintains the stable conduction of the power supply path. In the cable retraction state, the limiting component 90 at the end of the cable abuts against the cable outlet of the equipment, and the winding wheel cannot continue to rotate. The second driven transmission wheel 32 locks synchronously. At this time, the resistance exceeds the critical transmission force, and slippage occurs between the steel ball and the limiting groove 341. The first driven transmission wheel 31 spins freely, preventing the motor from continuously outputting torque and causing equipment damage, thus achieving overload protection.

[0030] By adjusting the pre-compression of the compression spring or the depth of the limiting groove 341, the tightness of the fit between the steel ball and the limiting groove 341 can be changed, thereby adjusting the magnitude of the critical transmission force and realizing flexible adjustment of the tension during the wire feeding operation to adapt to different application scenarios.

[0031] The role and effect of the embodiments The cord rewinding and unwinding device incorporated in the wall-mounted cleaning equipment according to the present invention employs an axial torque clutch structure with steel balls and compression springs. This ensures smooth transmission and a stable slippage threshold, significantly reducing the operational resistance of manual cord unwinding while maintaining the reliability of electric cord rewinding. It also features overload protection during rewinding, effectively extending the motor's lifespan. The wireless remote-controlled drive motor enhances operational convenience, and the compact layout of the limit mechanism integrated within the winding reel adapts to the internal space of the wall-mounted cleaning equipment, improving the overall integration and operational stability of the device.

[0032] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A cord winding and unwinding device placed inside a wall-mounted cleaning device, the cord winding and unwinding device being disposed within a closed receiving cavity of the cleaning device, comprising a winding reel assembly, a drive mechanism, and a limiting mechanism, characterized in that: A fixed shaft is fixedly installed inside the enclosed cavity, and the winding wheel assembly is rotatably mounted on the fixed shaft for winding and unwinding cables; The limiting mechanism is fixed to the stationary base of the cleaning equipment by a mounting base and extends entirely into the internal cavity of the winding wheel assembly. A support shaft is provided on the mounting base. The limiting mechanism includes a first driven drive wheel, a second driven drive wheel, an elastic pressing component, and a limiting fitting component. Both the first and second driven drive wheels are rotatably mounted on the support shaft. The first driven drive wheel is connected to the drive mechanism. The second driven drive wheel is engaged with the inner ring of the winding wheel assembly. At least one set of elastic pressing components is arranged circumferentially on the end face of the first driven drive wheel facing the second driven drive wheel. The elastic pressing component includes an elastic element and a pressing element. The elastic element is arranged axially, with one end abutting against the first driven drive wheel and the other end abutting against the pressing element. A limiting fitting component is fixedly provided on the end face of the second driven drive wheel facing the first driven drive wheel. The limiting fitting component has a limiting groove adapted to the pressing element on the end face of the first driven drive wheel. In the take-up state, the torque output by the drive mechanism is less than the critical transmission force of the elastic pressing component. The pressing component is fitted into the limiting groove. The first driven transmission wheel drives the second driven transmission wheel to rotate synchronously through the elastic pressing component and the limiting fitting component, thereby driving the winding wheel assembly to perform take-up. In the unwinding or take-up state, the resistance experienced by the second driven transmission wheel is greater than the critical transmission force. The pressing component compresses the elastic component and disengages from the limiting groove. The first driven transmission wheel and the second driven transmission wheel slip relative to each other, cutting off the power transmission path.

2. The cord retraction and extension device placed inside the wall-mounted cleaning equipment according to claim 1, characterized in that, The drive mechanism includes a drive motor, a drive pulley, and a timing belt. The drive motor is housed within a protective housing, with its output end extending outside the protective housing. The drive pulley is fixed to the exposed section of the output end, and the timing belt is sleeved between the drive pulley and the first driven transmission wheel.

3. The cord retraction and unwinding device placed inside the wall-mounted cleaning equipment according to claim 2, characterized in that, The drive motor is a wirelessly remote-controlled drive motor.

4. The cord retraction and unwinding device placed inside the wall-mounted cleaning equipment according to claim 1, characterized in that, The winding wheel assembly includes a winding wheel body and an internal gear ring fixed to the inner wall of the winding wheel body. The internal gear ring meshes with the external teeth of the second driven drive wheel, and the cable is wound around the outer periphery of the winding wheel body.

5. The cord retraction and unwinding device placed inside the wall-mounted cleaning equipment according to claim 1, characterized in that, Multiple sets of elastic pressing components are provided, and the multiple sets of elastic pressing components are evenly distributed along the circumference of the first driven transmission wheel.

6. The cord retraction and extension device placed inside a wall-mounted cleaning device according to claim 1 or 5, characterized in that, The first driven drive wheel has an axial through hole. A lower cover plate is fixedly connected to the side of the first driven drive wheel away from the second driven drive wheel. A blind hole is provided on the lower cover plate corresponding to the position of the through hole. One end of the elastic member is accommodated in the blind hole, and the other end passes through the through hole and abuts against the top pressure member.

7. The cord retraction and unwinding device placed inside the wall-mounted cleaning equipment according to claim 1, characterized in that, The cleaning equipment includes at least two mounting plates arranged opposite each other, and multiple surrounding plates that can cooperate with the two mounting plates to form the closed receiving cavity. The inner walls of the two mounting plates are provided with corresponding protruding mounting seats, and the opposite end faces of the two protruding mounting seats are provided with shaft mounting grooves. The two ends of the fixed shaft are respectively fixedly installed in the shaft mounting grooves on the corresponding sides, and the mounting base is fixed to the mounting plate.

8. The cord retraction and unwinding device placed inside the wall-mounted cleaning equipment according to claim 1, characterized in that, A top cover plate is provided on the side of the second driven transmission wheel away from the first driven transmission wheel. A fixing plate is provided between the top cover plate and the mounting base. The fixing plate is fixedly connected to the mounting base and is used to axially limit the transmission component of the limiting mechanism.

9. The cord retraction and unwinding device placed inside the wall-mounted cleaning equipment according to claim 1, characterized in that, A first bearing is provided between the first driven transmission wheel and the support shaft, a second bearing is provided between the second driven transmission wheel and the support shaft, and a connecting sleeve is provided between the first bearing and the second bearing.

10. The cord retraction and extension device placed inside the wall-mounted cleaning equipment according to claim 1, characterized in that, The top pressure component is a steel ball, and the elastic component is a compression spring. The critical transmission force can be adjusted by adjusting the pre-compression amount of the compression spring, thereby adjusting the magnitude of the tension during the wire feeding operation.

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