Lifting device of electric hanging cabinet and electric hanging cabinet

Abstract

This utility model discloses a lifting device for an electric hanging cabinet, including a motor, a traction rope, a rope winding wheel, a pulley, a limiting mechanism, and a control unit. One end of the traction rope is connected to the rope winding wheel, and the other end passes over the pulley and connects to the inner cabinet. The motor drives the rope winding wheel to rotate to wind and unwind the traction rope. The limiting mechanism includes an upper limit switch and a lower limit switch, and also includes a trigger gear. The trigger gear has a triggering part, which has a first position that triggers the upper limit switch to stop the inner cabinet at its highest point and a second position that triggers the lower limit switch to stop the inner cabinet at its lowest point. The rope winding wheel intermittently drives the trigger gear to rotate at a certain angle, and the triggering part switches between the first and second positions after the trigger gear rotates multiple times. This utility model's lifting device can effectively reduce the number of parts in the lifting device, thereby effectively reducing the size of the lifting device and also reducing the manufacturing cost of the product. In addition, an electric hanging cabinet using the above-mentioned lifting device is also disclosed.

Description

Technical Field

[0001] This utility model relates to the field of smart home, and in particular to a lifting device for electric wall cabinets and an electric wall cabinet. Background Technology

[0002] Existing electric hanging cabinets include an outer cabinet, an inner cabinet for storage, and a lifting device for driving the inner cabinet to rise and fall. The lifting device includes a motor, a traction rope, a rope winding wheel, a pulley, a limiting mechanism, and a control unit. One end of the traction rope is connected to the rope winding wheel, and the other end passes over the pulley and connects to the inner cabinet. The control unit controls the motor to rotate, which in turn drives the rope winding wheel to rotate and retract the traction rope, thereby driving the inner cabinet to rise and fall. To control the lifting stroke of the inner cabinet, the existing lifting device also includes a limiting mechanism, which includes an upper limit switch and a lower limit switch. When the inner cabinet rises to its highest point, the upper limit switch is triggered, at which point the inner cabinet is retracted and hidden inside the outer cabinet. When the inner cabinet falls to its lowest point, the lower limit switch is triggered, exposing the inner cabinet for easy access to items. The control unit is used to stop the motor from rotating after either the upper or lower limit switch is triggered.

[0003] To achieve the activation of the upper limit switch when the inner cabinet is at its highest point and the lower limit switch when the inner cabinet is at its lowest point, CN115872307A discloses a lifting mechanism and lifting system. The lifting control mechanism includes a motor, a transmission assembly, a wire rope, a first limit switch, and a second limit switch. The motor retracts or releases the wire rope through the transmission assembly. The transmission assembly includes a paddle gear set and a wire rope transmission assembly. The wire rope transmission assembly is connected to the output shaft of the motor and is driven to rotate by the motor. The paddle gear set includes a first paddle, a second paddle, a driving gear, a driven gear, and a paddle carrier. The driving gear is connected to the rotating shaft of the wire rope transmission assembly, the driven gear meshes with the driving gear, and the paddle carrier is coaxially connected to the driven gear. The first paddle and the second paddle are respectively connected to different positions distributed along the circumferential direction on the side of the paddle carrier. The motor rotates forward, driving the wire rope transmission assembly to rotate and retract the wire rope, thereby raising the lifting equipment. The motor rotates in reverse, driving the wire rope transmission assembly to rotate and release the wire rope, thereby lowering the lifting equipment. The first lever is configured to activate the first limit switch when the motor rotates forward to the first target stroke (i.e., when it rises to the highest point), causing the first limit switch to switch from a closed state to an open state. The second lever is configured to activate the second limit switch when the motor rotates in reverse to the second target stroke (i.e., when it descends to the lowest point), causing the second limit switch to switch from a closed state to an open state.

[0004] The aforementioned structure achieves a large transmission ratio between the wire rope drive assembly and the shifter plate by incorporating a driving gear, several driven gears, and a shifter plate. This results in output deceleration of the shifter plate. Consequently, the shifter plate only rotates a certain angle for every revolution of the wire rope drive assembly. After the wire rope drive assembly has rotated N revolutions to bring the lifting device to its limit position, either the first or second shifter plate can rotate a set angle (less than 360°) to trigger the corresponding limit switch. Therefore, the existing technology requires a large number of gears for deceleration, resulting in a large number of components and a bulky overall size for the lifting control mechanism, thus increasing manufacturing costs. Utility Model Content

[0005] To address the technical problems of existing technologies that involve multiple gear reductions resulting in numerous components, large size, and high cost, this utility model provides a lifting device and an electric hanging cabinet, which can effectively reduce the number of components in the lifting device, thereby reducing its size and manufacturing costs.

[0006] To achieve the above technical objectives, the electric hanging cabinet lifting device provided by this utility model includes a motor, a traction rope, a rope winding wheel, a pulley, a limiting mechanism, and a control unit. One end of the traction rope is connected to the rope winding wheel, and the other end passes around the pulley and connects to the inner cabinet. The motor drives the rope winding wheel to rotate to wind and unwind the traction rope. The limiting mechanism includes an upper limit switch and a lower limit switch, and also includes a trigger gear. The trigger gear has a triggering part, which has a first position that triggers the upper limit switch to stop the inner cabinet at the highest point and a second position that triggers the lower limit switch to stop the inner cabinet at the lowest point. The rope winding wheel intermittently drives the trigger gear to rotate at a certain angle, and the triggering part switches between the first position and the second position after the trigger gear rotates multiple times.

[0007] Preferably, the rope-winding wheel is connected to a synchronously rotating transmission rod, and when the rope-winding wheel rotates one revolution, the transmission rod drives the trigger gear to rotate by one tooth pitch angle.

[0008] Preferably, the rope winding wheel is connected to a synchronously rotating transmission gear, the transmission rod is fixedly mounted on the transmission gear, and the motor drives the rope winding wheel to rotate by driving the transmission gear.

[0009] Preferably, the lifting device further includes a double gear, which includes a large gear and a small gear arranged coaxially and rotating synchronously. The output end of the motor meshes with the large gear, and the small gear meshes with the transmission gear. The number of teeth of the transmission gear is greater than the number of teeth of the small gear.

[0010] Preferably, the transmission gear is mounted on top of the rope winding wheel, the transmission rod is located on the lower end face of the transmission gear, and part of the trigger gear is located below the transmission gear.

[0011] Preferably, the lifting device further includes a housing for housing the motor, the winding wheel, the limiting mechanism and the control unit. The trigger gear has a wave-like surface extending circumferentially around the rotation axis of the trigger gear. The housing has a mating surface that matches the wave-like surface. Under the action of the elastic element, the trigger gear keeps the wave-like surface in contact with the mating surface.

[0012] Preferably, a fixed shaft is installed inside the housing, the trigger gear is rotatably sleeved on the outside of the fixed shaft, and the elastic element is sleeved on the outside of the fixed shaft and press-fitted between the housing and the trigger gear.

[0013] Preferably, the control unit includes a main control board, the upper limit switch and the lower limit switch are disposed on the main control board, and the upper limit switch and the lower limit switch are spaced apart on the rotation path of the trigger part.

[0014] Preferably, the motor is a dual-head motor, and the two output ends of the dual-head motor drive two rope winding wheels to rotate respectively. The two rope winding wheels are located on the same radial side of the motor and are spaced apart along the axial direction of the motor. The control unit is located between the two rope winding wheels.

[0015] This utility model also discloses an electric hanging cabinet, including an outer cabinet, an inner cabinet, and a lifting device for driving the inner cabinet to rise and fall. The lifting device is the lifting device described in any of the above technical solutions, and the lifting device is fixed to the top wall of the outer cabinet.

[0016] By adopting the above technical solution, this utility model has the following advantages:

[0017] 1. The limiting mechanism of this utility model also includes a trigger gear. The trigger gear has a triggering part, which has a first position that triggers the upper limit switch to stop the inner cabinet at the highest point and a second position that triggers the lower limit switch to stop the inner cabinet at the lowest point. The rope wheel intermittently drives the trigger gear to rotate a certain angle. After the trigger gear rotates multiple times, the triggering part switches between the first position and the second position. By intermittently driving the trigger gear to rotate a certain angle, the rotational speed of the rope wheel can be made greater than the rotational speed of the trigger gear, so that the rope wheel and the trigger gear cooperate to form a reduction structure. The more teeth the trigger gear has, the greater the reduction ratio of the reduction structure. When the inner cabinet switches between the lowest and highest points, the rope wheel needs to rotate multiple times to release or retract. Since the rotation angle required for the trigger to switch between the first and second positions is less than 360°, by reasonably setting the number of teeth on the trigger gear, the trigger can switch from the first position to the second position or vice versa after the rope wheel rotates multiple times. Therefore, compared to the existing technology that uses multiple gears to achieve deceleration, this invention uses a scheme where the rope wheel intermittently drives the trigger gear to rotate at a certain angle to achieve deceleration. This achieves a larger deceleration ratio while requiring fewer parts, effectively reducing the size of the lifting device and lowering manufacturing costs. Furthermore, this invention only requires one trigger on the trigger gear, compared to the existing technology which uses two levers, resulting in a simpler structure and easier assembly.

[0018] 2. The rope wheel is connected to a synchronously rotating transmission rod. Each rotation of the rope wheel drives the trigger gear to rotate by one tooth pitch angle via the transmission rod. Assuming the inner cabinet achieves its extreme position switching between the highest and lowest points after N rotations of the rope wheel, since the trigger gear only rotates by one tooth pitch angle (one tooth) per rotation of the rope wheel, the central angle between the upper and lower limit switches can be precisely set to the sum of N tooth pitch angles. This allows designers to accurately fix the positions of the upper and lower limit switches, ensuring the inner cabinet always stops at the same preset extreme position without deviation.

[0019] 3. The rope winding wheel is connected to a synchronously rotating transmission gear, and the transmission rod is fixed on the transmission gear. The motor drives the rope winding wheel to rotate by driving the transmission gear. In the prior art, a reduction gear set is set between the rope winding wheel and the motor. One of the reduction gears constitutes a transmission gear that rotates synchronously with the rope winding wheel. While the transmission gear plays the role of power transmission and deceleration, it also provides a mounting position for the transmission rod, achieving a dual-purpose effect. Compared with the requirement to raise the rope winding wheel to avoid interfering with the winding of the traction rope, this technical solution does not require replacing the rope winding wheel and can fix the transmission rod using the existing transmission gear.

[0020] 4. The lifting device also includes a double gear, consisting of a large gear and a small gear arranged coaxially and rotating synchronously. The motor's output end meshes with the large gear, and the small gear meshes with the transmission gear. The transmission gear has more teeth than the small gear. This design allows for a larger overall reduction ratio, greatly increasing the output torque and thus obtaining greater traction, enabling the lifting device to lift heavier loads (such as fully loaded cabinets). It also allows for the use of smaller, cheaper standard motors, reducing motor costs.

[0021] 5. The transmission gear is mounted on top of the rope winding wheel, the transmission rod is located on the lower end face of the transmission gear, and part of the trigger gear is located below the transmission gear. This design utilizes the space below the transmission gear to accommodate part of the trigger gear, making the distribution of the transmission gear and trigger gear more compact, thereby reducing the space occupied by both after assembly and further reducing the size of the lifting device.

[0022] 6. The lifting device also includes a housing for housing the motor, the winding wheel, the limiting mechanism and the control unit. The trigger gear has a wave-like surface that extends circumferentially around the axis of rotation of the trigger gear. The housing has a mating surface that matches the wave-like surface. Under the action of the elastic element, the trigger gear keeps the wave-like surface and the mating surface in contact. Because the winding wheel intermittently drives the trigger gear to rotate at a certain angle, during the period when the winding wheel does not drive the trigger gear to rotate, the wave surface, under the action of the elastic element, keeps in contact with the mating surface, thereby circumferentially limiting the trigger gear. This prevents the trigger gear from rotating unexpectedly due to vibration. When the winding wheel drives the trigger gear to rotate, the trigger gear can overcome the pressure of the elastic element under the push of the winding wheel, causing the crest of the wave surface to slide over the mating surface and fall into the next trough of the mating surface. The circumferential self-locking of the trigger gear is achieved through the engagement of the crest of the wave surface and the trough of the mating surface, preventing the trigger gear from rotating circumferentially. In this way, after the inner cabinet reaches the limit position and triggers the corresponding limit switch, even if the motor is powered off, this structure can firmly lock the trigger gear, preventing it from loosening or retracting. This ensures that the limit signal will not disappear unexpectedly, and the control unit will stably keep the motor in a stopped state, greatly enhancing safety and preventing the "runaway" phenomenon.

[0023] 7. A fixed shaft is installed inside the housing. The trigger gear is rotated and sleeved on the outside of the fixed shaft. The elastic element is sleeved on the outside of the fixed shaft and press-fitted between the housing and the trigger gear. With this design, the fixed shaft can guide the elastic element to extend and retract along the axial direction of the fixed shaft, so as to avoid the problem of uneven pressing of the trigger gear due to the extension and retraction of the elastic element, resulting in incomplete contact between the wavy surface and the mating surface.

[0024] 8. The control unit includes a main control board, on which the upper and lower limit switches are mounted. The upper and lower limit switches are circumferentially spaced along the rotation path of the trigger unit. This design eliminates the need to reserve installation positions and wiring space for the upper and lower limit switches and their connected wires. By concentrating the upper and lower limit switches on a single main control board, the entire control unit has a very compact and orderly structure, allowing for a smaller housing and freeing up more space for other components. Furthermore, the mounting holes for the two limit switches can be precisely machined using the main control board manufacturing process, ensuring the accuracy of their positions.

[0025] 9. The motor is a dual-head motor, with its two outputs driving two rope-winding pulleys respectively. The two pulleys are located on the same radial side of the motor and spaced apart along its axial direction. The control unit is located between the two pulleys. This design, using a dual-head motor to drive the two pulleys, allows the lifting device to lift heavier loads, enabling the inner cabinet to hold more items. Furthermore, utilizing the space between the two pulleys to house the control unit makes the structure more compact, further reducing the size of the lifting device. Finally, the space between the two pulleys also facilitates heat dissipation from the motor, improving its cooling performance. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the inner cabinet of the electric hanging cabinet in Embodiment 1 of this utility model when it reaches its highest point;

[0027] Figure 2 This is a schematic diagram of the lifting device in Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the internal structure of the shell after the top cover is removed in Embodiment 1 of this utility model;

[0029] Figure 4 This is an exploded schematic diagram of the lifting device (when the rope wheel retracts the traction rope) in Embodiment 1 of this utility model;

[0030] Figure 5 This is an exploded view of part of the structure in Embodiment 1 of this utility model;

[0031] Figure 6 This is a schematic diagram of the trigger gear in Embodiment 1 of this utility model;

[0032] Figure 7 This is a cross-sectional view of part of the structure of the lifting device when lifting the inner cabinet in Embodiment 1 of this utility model;

[0033] Figure 8 for Figure 7 A magnified view of part A in the diagram;

[0034] Figure 9 This is a schematic diagram of the upper limit switch triggered by the triggering part in Embodiment 1 of this utility model;

[0035] Figure 10 for Figure 9 A magnified view of part B in the diagram;

[0036] Figure 11 This is a schematic diagram of the inner cabinet of the electric hanging cabinet in Embodiment 1 of this utility model when it stops at the lowest point;

[0037] Figure 12 This is a schematic diagram of the lifting device (when the rope wheel releases the traction rope) in Embodiment 1 of this utility model;

[0038] Figure 13 This is a cross-sectional view of part of the structure of the lifting device when lowering the inner cabinet in Embodiment 1 of this utility model;

[0039] Figure 14 for Figure 13 A magnified view of part of C;

[0040] Figure 15 This is a schematic diagram of the structure of the triggering part triggering the lower limit switch in Embodiment 1 of this utility model;

[0041] Figure 16 for Figure 15 A magnified view of part of D;

[0042] In the diagram, 100 is the motor; 200 is the traction rope; 300 is the rope winding wheel; 400 is the pulley; 500 is the limit mechanism; 510 is the upper limit switch; 520 is the lower limit switch; 530 is the trigger gear; 531 is the trigger part; 532 is the gear part; 533 is the support part; 534 is the wave surface; 540 is the elastic element; 600 is the control unit; 700 is the transmission rod; 800 is the transmission gear; 900 is the double gear; 910 is the large gear; 920 is the small gear; 1000 is the housing; 1100 is the top cover; 1200 is the bottom shell; 1210 is the annular boss; 1300 is the fixed shaft; and 1400 is the mating surface.

[0043] 01. Inner cabinet; 02. Outer cabinet. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," and "bottom," etc., which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0045] Example 1

[0046] Combination Figures 1 to 16 This embodiment provides a lifting device for an electric hanging cabinet, including a motor 100, a traction rope 200, a rope winding wheel 300, a pulley 400, a limiting mechanism 500, and a control unit 600. The traction rope 200 is usually a steel wire rope. One end of the traction rope 200 is connected to the rope winding wheel 300, and the other end extends downward after passing over the pulley 400 and is connected to the inner cabinet 01. In this embodiment, there are two traction ropes 200, two rope winding wheels 300, and two pulleys 400. One end of each of the two traction ropes 200 is connected to one of the two rope winding wheels 300, and the other end of each of the two traction ropes 200 extends downward after passing over the pulley 400 and is connected to both sides of the inner cabinet 01. The motor 100 drives the rope reel 300 to rotate to retract or release the traction rope 200. The limiting mechanism 500 includes an upper limit switch 510 and a lower limit switch 520. The control unit 600 can control the working state of the motor 100 according to the signals sent by the upper limit switch 510 and the lower limit switch 520. That is, when the control unit 600 receives a signal that the upper limit switch 510 or the lower limit switch 520 is triggered, it controls the motor 100 to stop rotating. Alternatively, the upper limit switch 510 and the lower limit switch 520 are respectively connected to the control circuit of the motor 100 and are normally in a closed state. When the upper limit switch 510 and the lower limit switch 520 are triggered, they switch to an open state to interrupt the current of the control circuit and stop the motor 100 from rotating.

[0047] Furthermore, the limiting mechanism 500 in this embodiment also includes a trigger gear 530. The trigger gear 530 is provided with a trigger part 531. The trigger part 531 has a first position that triggers the upper limit switch 510 to stop the inner cabinet 01 at the highest point and a second position that triggers the lower limit switch 520 to stop the inner cabinet 01 at the lowest point. That is, when the trigger part 531 is in the first position, the trigger part 531 triggers the upper limit switch 510 to stop the inner cabinet 01 at the highest point; when the trigger part 531 is in the second position, the trigger part 531 triggers the lower limit switch 520 to stop the inner cabinet 01 at the lowest point. The rope wheel 300 intermittently drives the trigger gear 530 to rotate a certain angle, and the trigger part 531 switches between the first position and the second position after the trigger gear 530 rotates multiple times. By intermittently driving the trigger gear 530 to rotate at a certain angle, the rotational speed of the winding wheel 300 can be made greater than the rotational speed of the trigger gear 530. This allows the winding wheel 300 and the trigger gear 530 to cooperate to form a reduction structure. Furthermore, the more teeth the trigger gear 530 has, the greater the reduction ratio of the reduction structure. Since the inner cabinet 01 is at its lowest point (e.g., ... Figure 11 ) and the highest point (e.g.) Figure 1 When switching between the first and second positions, the rope wheel 300 needs to rotate multiple times to release or retract the device. The rotation angle required for the trigger part 531 to switch between the first and second positions is less than 360°. Therefore, by reasonably setting the number of teeth of the trigger gear 530, the trigger part 531 can switch from the first position to the second position or from the second position to the first position only after the rope wheel 300 has rotated multiple times. Therefore, compared with the existing technology that uses multiple gears to achieve deceleration, this embodiment uses the rope wheel 300 to intermittently drive the trigger gear 530 to rotate a certain angle to achieve deceleration. This achieves a larger deceleration ratio while requiring fewer parts, thereby effectively reducing the size of the lifting device and reducing the manufacturing cost of the product. In addition, only one trigger part 531 needs to be set on the trigger gear 530 in this embodiment, which is simpler in structure and easier to assemble than the two levers in the existing technology.

[0048] In order to ensure that the traction rope 200 can be wound in an orderly manner on the winding wheel 300, the outer periphery of the winding wheel 300 in this embodiment is provided with a winding groove that extends along the axis of the winding wheel 300 and is spiral in shape. When the traction rope 200 is retracted, it is wound in the winding groove.

[0049] To enable the winding wheel 300 to intermittently drive the trigger gear 530 to rotate at a certain angle, in this embodiment, the winding wheel 300 is connected to a synchronously rotating transmission rod 700. When the winding wheel 300 rotates once, it drives the trigger gear 530 to rotate by one tooth pitch angle through the transmission rod 700. Assuming that the inner cabinet 01 achieves the switch between the highest and lowest extreme positions after the winding wheel 300 rotates N times, since the trigger gear 530 is driven to rotate by one tooth pitch angle only after the winding wheel 300 rotates once (i.e., one tooth), the central angle between the upper limit switch 510 and the lower limit switch 520 can be precisely set as the sum of N tooth pitch angles. This allows designers to accurately fix the positions of the upper limit switch 510 and the lower limit switch 520, ensuring that the inner cabinet 01 stops at the same preset extreme position each time without deviation.

[0050] Taking the example that the winding wheel 300 can wind 10 turns of the traction rope 200 in this embodiment, the motor 100 drives the winding wheel 300 to rotate 8 times clockwise, which can lower the inner cabinet 01 from the highest point to the lowest point. The motor 100 drives the winding wheel 300 to rotate 8 times counterclockwise, which can raise the inner cabinet 01 from the lowest point to the highest point. Thus, during the switching between the highest and lowest points of the inner cabinet 01, the trigger gear 530 will rotate 8 times, for a total of 8 tooth pitch angles, that is, rotate 8 teeth. Thus, the central angle between the upper limit switch 510 and the lower limit switch 520 can be accurately set to the sum of 8 tooth pitch angles, so as to ensure that the trigger part 531 triggers the upper limit switch 510 in the first position and triggers the lower limit switch 520 in the second position. It should be noted that, in order to avoid interference during the installation of the upper limit switch 510 and the lower limit switch 520, the trigger gear 530 has more than 8 teeth, such as 10 teeth or 11 teeth, to provide sufficient reserved space for the installation of the upper limit switch 510 and the lower limit switch 520 in the circumferential direction.

[0051] In this embodiment, the winding wheel 300 is connected to a synchronously rotating transmission gear 800. The transmission gear 800 is fixed to one end of the winding wheel 300 by screws, thus limiting the transmission gear 800 relative to the winding wheel 300 in both the circumferential and axial directions. The transmission rod 700 is fixedly mounted on the transmission gear 800. The motor 100 drives the winding wheel 300 to rotate by driving the transmission gear 800. Currently, in order to convert the high speed and low torque of the motor 100 into the low speed and high torque required by the load, typically in the motor 100... A reduction gear set is set between the 00 and the rope winding wheel 300. One of the reduction gears constitutes a transmission gear 800 that rotates synchronously with the rope winding wheel 300. The transmission gear 800 not only transmits power and reduces speed, but also provides a mounting position for the transmission rod 700, achieving a dual-purpose effect. Compared with the transmission rod being set on the rope winding wheel, which requires raising the rope winding wheel to avoid interfering with the winding of the traction rope, this technical solution does not require replacing the rope winding wheel 300. The transmission rod 700 can be fixed using the existing transmission gear 800.

[0052] Furthermore, the lifting device in this embodiment also includes a double gear 900, which comprises a large gear 910 and a small gear 920 coaxially arranged and rotating synchronously. The output end of the motor 100 meshes with the large gear 910, and the small gear 920 meshes with the transmission gear 800. The number of teeth on the transmission gear 800 is greater than the number of teeth on the small gear 920. That is, the double gear 900 and the transmission gear 800 cooperate to form a reduction gear set. This design can achieve a larger overall reduction ratio, greatly improve the output torque, and thus obtain greater traction force, enabling the lifting device to lift heavier loads (such as an inner cabinet 01 filled with items). At the same time, it also allows the use of smaller and cheaper standard motors to reduce motor costs.

[0053] In addition, such as Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, in this embodiment, the transmission gear 800 is mounted on the top of the rope winding wheel 300 by screws. The outer diameter of the transmission gear 800 is larger than that of the rope winding wheel 300. The transmission rod 700 is located on the lower end face of the transmission gear 800, extending beyond the rope winding wheel 300 and vertically downward. Partial trigger gear 530 is located below the transmission gear 800. This design utilizes the space below the transmission gear 800 to accommodate partial trigger gear 530, allowing for a more compact distribution of the transmission gear 800 and trigger gear 530, reducing the space occupied after assembly, and further reducing the size of the lifting device.

[0054] Furthermore, the lifting device in this embodiment also includes a housing 1000, which includes an upper cover 1100 and a bottom shell 1200 connected by screws. The top and bottom of the rope wheel 300 are integrally formed with an upper rotating shaft and a lower rotating shaft, respectively. The upper rotating shaft and the lower rotating shaft are coaxially arranged. The upper rotating shaft is rotatably engaged with the upper cover 1100, and the lower rotating shaft is rotatably engaged with the bottom shell 1200. The rope wheel 300 is axially fixed between the upper cover 1100 and the bottom shell 1200. The transmission gear 800 is sleeved on the outside of the upper rotating shaft and fixedly connected to the top of the rope wheel 300 by screws. The motor 100, the limiting mechanism 500, the control unit 600, and the double gear 900 are all installed inside the housing 1000. The other end of the traction rope 200 passes through the housing 1000 and passes around the pulley 400. The double gear 900 is rotatably installed inside the housing 1000.

[0055] like Figure 6 As shown, the trigger gear 530 in this embodiment includes a synchronously rotating gear part 532 and a support part 533. The gear part 532 is integrally formed on the top of the support part 533. The outer diameter of the gear part 532 is larger than the outer diameter of the support part 533. The lower end face of the gear part 532 is provided with a trigger part 531 outside the support part 533. The trigger part 531 has a frustum-shaped structure. Multiple teeth are evenly spaced on the outer periphery of the gear part 532. A tooth groove is formed between two adjacent teeth. The transmission rod 700 can drive the trigger gear 530 to rotate a certain angle by cooperating with one of the tooth grooves.

[0056] like Figures 4 to 8 As shown, in this embodiment, the housing 1000 has a fixed shaft 1300, the upper cover 1100 has an upper positioning groove, and the bottom shell 1200 has a lower positioning groove. The two ends of the fixed shaft 1300 are respectively inserted and fixed into the upper and lower positioning grooves. The trigger gear 530 is rotatably sleeved on the outside of the fixed shaft 1300 and can slide axially relative to the fixed shaft 1300. The trigger gear 530 has a wave surface 534 extending circumferentially around the axis of rotation of the trigger gear 530. The number of wave crests on the wave surface 534 is the same as the number of teeth on the gear part 532. Specifically, the support part 533 is an annular support sleeve coaxially arranged with the gear part 532, and the wave surface 534 is located on the bottom surface of the support part 533 (e.g., ...). Figure 6 As shown), the housing 1000 is provided with a mating surface 1400 that matches the wave surface 534, that is, the inner side of the bottom shell 1200 is provided with an annular boss 1210, and the top surface of the annular boss 1210 forms a circumferentially extending and wave-shaped mating surface 1400 (as shown). Figure 4As shown, the trigger gear 530, under the action of the elastic element 540, keeps the wave surface 534 in contact with the mating surface 1400. Since the rope wheel 300 intermittently drives the trigger gear 530 to rotate by one tooth pitch angle, during the period when the rope wheel 300 is not driving the trigger gear 530 to rotate, the wave surface 534, under the action of the elastic element 540, keeps in contact with the mating surface 1400, thus circumferentially limiting the trigger gear 530. This prevents the trigger gear 530 from rotating unexpectedly due to vibration. When the rope wheel 300 drives the trigger gear 530 to rotate, the trigger gear 530 can overcome the pressure of the elastic element 540 and slide upwards under the push of the rope wheel 300, allowing the crest of the wave surface 534 to slide over the mating surface 1400. The peak of the wave falls into the next trough of the mating surface 1400. The circumferential self-locking of the trigger gear 530 is achieved through the interaction of the peak of the wave surface 534 and the trough of the mating surface 1400, preventing the trigger gear 530 from rotating circumferentially due to vibration. In this way, after the inner cabinet 01 reaches the limit position and triggers the corresponding limit switch, even if the motor 100 is de-energized, this structure can firmly lock the trigger gear 530 to prevent it from loosening or retracting. This ensures that the limit signal will not disappear unexpectedly, and the control unit 600 will stably keep the motor 100 in a stopped state, which greatly enhances safety and prevents the "rolling" phenomenon.

[0057] In this embodiment, the elastic element 540 is a spring. The elastic element 540 is sleeved on the outside of the fixed shaft 1300 and press-fitted between the top cover 1100 and the top of the trigger gear 530 to apply downward pressure to the trigger gear 530, keeping the wavy surface 534 in contact with the mating surface 1400. This design allows the fixed shaft 1300 to guide the elastic element 540 to extend and retract along the axial direction of the fixed shaft 1300, preventing imbalance in the pressure applied to the trigger gear 530 due to the elastic element 540's extension or retraction, thus avoiding incomplete contact between the wavy surface 534 and the mating surface 1400.

[0058] It is understood that in other embodiments of this utility model, the bottom surface of the support and the top surface of the annular boss can both be annular planes. The two annular planes are kept in contact under the action of the elastic element. The friction between the two annular planes can also effectively prevent the trigger gear from rotating circumferentially, so that the trigger gear can achieve circumferential self-locking when it is not driven by the rope wheel.

[0059] The control unit 600 in this embodiment includes a main control board, an upper limit switch 510 and a lower limit switch 520 disposed on the main control board, and a support part 533 supported on the bottom shell 1200 so that the gear part 532 is higher than the main control board. The upper limit switch 510 and the lower limit switch 520 are disposed between the main control board and the gear part 532, and the upper limit switch 510 and the lower limit switch 520 are circumferentially spaced on the rotation path of the trigger part 531. In this embodiment, the upper limit switch 510 and the lower limit switch 520 are both mechanical trigger switches, and the trigger points of the upper limit switch 510 and the lower limit switch 520 are circumferentially spaced on the rotation path of the trigger part 531. This design eliminates the need to reserve installation positions and wiring space for the upper limit switch 510 and the lower limit switch 520, as well as the wires connected to them. By concentrating the upper limit switch 510 and the lower limit switch 520 on a single main control board, the entire control unit 600 has a very compact and orderly structure, which helps to make the housing 1000 smaller and frees up more space for other components. In addition, the mounting holes for the two limit switches can be precisely machined through the main control board process, thus ensuring the accuracy of the positions of the two limit switches.

[0060] Finally, in this embodiment, the motor 100 is a dual-head motor. The two output ends of the dual-head motor drive two rope-winding wheels 300 to rotate respectively. The two rope-winding wheels 300 are located on the same radial side of the motor 100 and are spaced apart along the axial direction of the motor 100. The control unit 600 is located between the two rope-winding wheels 300. This design, using a dual-head motor to drive the two rope-winding wheels 300 to rotate respectively, allows the lifting device to lift heavier loads, so that the inner cabinet 01 can accommodate more items. In addition, utilizing the space between the two rope-winding wheels 300 to accommodate the control unit 600 makes the structure more compact, further reducing the size of the lifting device. Finally, the space between the two rope-winding wheels 300 also facilitates the dissipation of heat from the motor 100, improving the heat dissipation effect of the motor 100.

[0061] It is understood that in other embodiments of this utility model, the transmission gear may also be located at the bottom of the winding wheel, in which case the large gear with double teeth is located above the small gear, and the transmission rod is located on the top surface of the transmission gear and extends vertically upward.

[0062] The working principle of the lifting device in this embodiment is explained below:

[0063] Figure 1 When the inner cabinet 01 reaches its highest point, the traction rope 200 is in the retraction state and fully wound around the rope reel 300 (e.g. Figure 5 As shown), and as Figure 8 and Figure 10 As shown, the trigger unit 531 is in the first position and triggers the upper limit switch 510.

[0064] When a user needs to lower the inner cabinet 01 to retrieve or place items, the control unit 600 can control the motor 100 to rotate forward, driving the rope wheel 300 to rotate forward and release the traction rope 200, causing the inner cabinet 01 to descend. During the descent of the inner cabinet 01, for every one revolution of the rope wheel 300, the trigger gear 530 is driven to rotate forward by one tooth pitch angle. After the rope wheel 300 has rotated forward 8 times, the inner cabinet 01 has descended to its lowest point (e.g., ...). Figure 11 As shown), at this time, the trigger gear 530 rotates 8 times, which also causes the trigger part 531 to rotate 8 tooth pitch angles, thereby causing the trigger part 531 to switch from the first position to the second position and trigger the lower limit switch 520 (as shown). Figure 14 and Figure 16 (As shown).

[0065] When the user needs the inner cabinet 01 to rise to its retracted position, the control unit 600 controls the motor 100 to reverse, which in turn drives the rope reel 300 to reverse and retract the traction rope 200, causing the inner cabinet 01 to rise. During the rising process of the inner cabinet 01, for each rotation of the rope reel 300, the trigger gear 530 is driven to reverse by one tooth pitch angle. After the rope reel 300 has rotated 8 times, the inner cabinet 01 rises to its highest point (e.g., ...). Figure 1 As shown), at this time, the trigger gear 530 reverses 8 times, causing the trigger part 531 to rotate 8 tooth pitch angles, thereby switching the trigger part 531 from the second position to the first position and triggering the upper limit switch 510 (as shown). Figure 8 and Figure 10 (As shown).

[0066] It is understood that in other embodiments of this utility model, the transmission gear may also be provided with two transmission rods, which are symmetrically arranged about the rotation axis of the transmission gear. In this way, every time the rope wheel rotates once, the trigger gear will be driven to rotate by two tooth pitch angles through the two transmission rods. By increasing the number of teeth of the trigger gear, the deceleration from the rope wheel to the trigger gear can also be achieved.

[0067] Example 2

[0068] Combination Figure 1 As shown, this embodiment also provides an electric hanging cabinet, including an outer cabinet 02, an inner cabinet 01, and a lifting device for driving the inner cabinet to rise and fall. The lifting device adopts the lifting device described in Embodiment 1. The housing 1000 of the lifting device is fixed to the inner side of the top wall of the outer cabinet 02 by screws, while the pulley 400 is installed on the top of the outer cabinet 02 by a pulley bracket.

[0069] The other structures of Embodiment 2 are the same as those of Embodiment 1, and will not be described in detail here.

[0070] In addition to the preferred embodiments described above, there are other embodiments of this utility model. Those skilled in the art can make various changes and modifications based on this utility model. As long as they do not depart from the spirit of this utility model, they should all fall within the scope defined in the claims of this utility model.

Claims

1. The lifting device of electric hanging cabinet, comprising motor, traction rope, winding rope wheel, pulley, limiting mechanism and control unit, one end of the traction rope is connected with the winding rope wheel, the other end of the traction rope is connected with the inner cabinet through the pulley, the motor drives the winding rope wheel to rotate to wind or unwind the traction rope, the limiting mechanism comprises upper limit switch and lower limit switch, characterized in that, The limiting mechanism also includes a trigger gear, which has a triggering part. The triggering part has a first position that triggers the upper limit switch to stop the inner cabinet at the highest point and a second position that triggers the lower limit switch to stop the inner cabinet at the lowest point. The rope wheel intermittently drives the trigger gear to rotate at a certain angle. The triggering part achieves the switching between the first position and the second position after the trigger gear rotates multiple times.

2. The lifting device for the electric overhead cabinet as described in claim 1, characterized in that, The rope-winding wheel is connected to a synchronously rotating transmission rod. When the rope-winding wheel rotates one revolution, the transmission rod drives the trigger gear to rotate by one tooth pitch angle.

3. The lifting device for the electric overhead cabinet as described in claim 2, characterized in that, The rope-winding wheel is connected to a synchronously rotating transmission gear, the transmission rod is fixedly mounted on the transmission gear, and the motor drives the rope-winding wheel to rotate by driving the transmission gear.

4. The lifting device for the electric overhead cabinet as described in claim 3, characterized in that, The lifting device also includes a double gear, which consists of a large gear and a small gear arranged coaxially and rotating synchronously. The output end of the motor meshes with the large gear, and the small gear meshes with the transmission gear. The number of teeth of the transmission gear is greater than the number of teeth of the small gear.

5. The lifting device for the electric overhead cabinet as described in claim 3, characterized in that, The transmission gear is mounted on top of the rope winding wheel, the transmission rod is located on the lower end face of the transmission gear, and part of the trigger gear is located below the transmission gear.

6. The lifting device for the electric overhead cabinet as described in claim 1, characterized in that, The lifting device also includes a housing for housing the motor, the winding wheel, the limiting mechanism and the control unit. The trigger gear has a wave-like surface that extends circumferentially around the axis of rotation of the trigger gear. The housing has a mating surface that matches the wave-like surface. Under the action of the elastic element, the trigger gear keeps the wave-like surface and the mating surface in contact.

7. The lifting device for the electric overhead cabinet as described in claim 6, characterized in that, A fixed shaft is installed inside the housing. The trigger gear is rotatably sleeved on the outside of the fixed shaft. The elastic element is sleeved on the outside of the fixed shaft and press-fitted between the housing and the trigger gear.

8. The lifting device for the electric overhead cabinet as described in claim 1, characterized in that, The control unit includes a main control board, and the upper limit switch and the lower limit switch are disposed on the main control board. The upper limit switch and the lower limit switch are circumferentially spaced on the rotation path of the trigger part.

9. The lifting device for the electric overhead cabinet as described in claim 1, characterized in that, The motor is a dual-head motor. The two output ends of the dual-head motor drive two rope winding wheels to rotate respectively. The two rope winding wheels are located on the same radial side of the motor and are spaced apart along the axial direction of the motor. The control unit is located between the two rope winding wheels.

10. An electric overhead cabinet, comprising an outer cabinet, an inner cabinet, and a lifting device for driving the inner cabinet to rise and fall, characterized in that, The lifting device is the lifting device according to any one of claims 1 to 9, and the lifting device is fixed to the top wall of the outer cabinet.

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