Electric lifting drying rod pull-out type switching mechanism and electric lifting drying rod

Abstract

The utility model discloses electric lift drying rod pull-out type switching mechanism and electric lift drying rod, electric lift drying rod pull-out type switching mechanism includes a drive motor and pull-out type switching device, pull-out type switching device includes transmission shaft, transmission gear, first winding subassembly and second winding subassembly, transmission shaft penetrates the rotation axis of first winding subassembly, transmission gear and second winding subassembly in proper order, drive motor rotates transmission gear through drive gear, transmission shaft can move axially to switch between first position and second position, under first position, transmission shaft is circumferential limit cooperation with transmission gear and first winding subassembly simultaneously, controls the lift of first drying rod, under second position, transmission shaft is circumferential limit cooperation with transmission gear and second winding subassembly simultaneously, controls the lift of second drying rod, its advantage lies in, realizes a drive motor to lift drying rod and carries out the lift control of electric individually, in the mode of pulling out, the operation is convenient, and one step reaches.

Description

Technical Field

[0001] This utility model relates to a lifting drying rack, and more particularly to an electric lifting drying rack pull-out switching mechanism that can electrically control the lifting and lowering of the drying rack. Background Technology

[0002] Besides choosing to use electric clothes drying racks, some families prefer the traditional and simple method of drying clothes indoors, opting to install retractable clotheslines on the balcony ceiling or suspended ceiling. Traditional retractable clotheslines typically have two parallel rods, with a crank installed on the wall. The crank and the rods are connected by a steel cable, and the hand crank controls the raising and lowering of both rods simultaneously. Each time the rods are raised or lowered, both rods and the clothes hanging on them need to be raised and lowered together, which is quite inconvenient.

[0003] For example, the utility model patent with authorization announcement number CN210795601U discloses a switchable clothes rack hand crank. Inside the hand crank housing, two rotating shafts connect two winding wheels that rotate side-by-side. One end of each shaft is connected to a large gear and a small gear in sequence. By setting a lever, the transmission wheel on the lever simultaneously meshes with the drive wheel and any one of the small gears, enabling rapid switching of the lifting control of the two clothes racks. It is evident that a manual crank can now switch between controlled clothes racks, allowing for individual control of the lifting of a single rack, making operation more autonomous and flexible.

[0004] However, as consumers increasingly demand greater automation in home appliances, the development of retractable clotheslines is inevitably shifting from manual to electric control. The problems that electric retractable clotheslines need to solve differ from those of manual ones. Because they require the use of a motor, cost reduction and lightweight design are essential. The key challenge for electric retractable clotheslines is achieving independent control of the retractable clothesline using only a single motor, with the simplest possible mechanism and the most convenient and reliable switching method. Utility Model Content

[0005] Existing lifting clotheslines either cannot achieve independent lifting and lowering of each rod in a switchable manner, or require manual control of lifting and lowering. The technical problem to be solved by this utility model is to provide an electric lifting clothesline pull-out switching mechanism and an electric lifting clothesline, which achieves electric and switchable independent control of lifting and lowering of the clotheslines with a more streamlined mechanism and a convenient and reliable switching method.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: an electric lifting drying rack pull-out switching mechanism, including a drive motor and a pull-out switching device; The pull-out switching device includes a drive shaft, a drive gear, a first winding assembly, and a second winding assembly; the first winding assembly and the second winding assembly are coaxially arranged on both sides of the drive gear, and the drive shaft passes through the rotation axis of the first winding assembly, the drive gear, and the second winding assembly in sequence; The drive shaft has a circumferential limiting structure with respect to the drive gear, the first winding assembly, and the second winding assembly; The output shaft of the drive motor is provided with a drive gear, which meshes with the transmission gear; the drive motor drives the transmission gear to rotate through the drive gear. The drive shaft is axially movable to switch between a first position and a second position; In the first position, the drive shaft is simultaneously engaged with the drive gear and the first winding assembly in a circumferential limiting manner. The drive gear drives the first winding assembly to rotate through the drive shaft, thereby controlling the raising and lowering of the first drying rod. In the second position, the drive shaft simultaneously engages with the drive gear and the second winding assembly in a circumferential limiting manner. The drive gear drives the second winding assembly to rotate via the drive shaft, thereby controlling the raising and lowering of the second drying rod.

[0007] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the rotation centers of the transmission gear, the first winding assembly, and the second winding assembly are all provided with central shaft holes; the transmission shaft passes through the central shaft holes of the first winding assembly, the transmission gear, and the second winding assembly in sequence; The circumferential limiting structure includes a limiting rod portion on the transmission shaft, and a limiting hole portion provided in the central shaft hole of the transmission gear, the first winding assembly, and the second winding assembly; In the first position, the limiting rod portion of the drive shaft is simultaneously located within the limiting hole portion of the drive gear and the first winding assembly, forming a circumferential limiting fit. In the second position, the limiting rod portion of the drive shaft is simultaneously located within the limiting holes of the drive gear and the second winding assembly, forming a circumferential limiting fit.

[0008] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is: the cross-section of the limiting rod on the transmission shaft is a regular hexagon; The cross-sections of the limiting holes of the transmission gear, the first winding assembly, and the second winding assembly are regular hexagonal.

[0009] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a first bearing is provided between the transmission gear and the first winding assembly; a second bearing is provided between the transmission gear and the second winding assembly.

[0010] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the first winding assembly includes a first winding wheel on which the first steel wire rope is wound and a first self-locking assembly sleeved inside the first winding wheel; The second winding assembly includes a second winding wheel on which a second steel wire rope is wound and a second self-locking assembly sleeved inside the second winding wheel; The limiting hole of the first winding assembly is disposed in the central shaft hole of the first self-locking assembly, and the limiting hole of the second winding assembly is disposed in the central shaft hole of the second self-locking assembly; In the first position, the first self-locking component is circumferentially locked to the first winding wheel, and the drive shaft drives the first self-locking component to rotate, thereby driving the first winding wheel to rotate and wind up and unwind the first wire rope; the second self-locking component is circumferentially unlocked to the second winding wheel. In the second position, the second self-locking component and the second winding wheel are circumferentially locked, and the drive shaft drives the second self-locking component to rotate, thereby driving the second winding wheel to rotate and wind up and unwind the second wire rope; the first self-locking component and the first winding wheel are circumferentially unlocked.

[0011] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the first self-locking component includes a first transmission component, a first spring base and a first locking spring disposed on the first spring base; the first transmission component is provided with a first locking block, and the first winding wheel is provided with a first locking ring with a notch; the limiting hole is disposed in the central shaft hole of the first transmission component; The second self-locking assembly includes a second transmission component, a second spring base, and a second locking spring disposed on the second spring base; the second transmission component is provided with a second locking block, and the second winding wheel is provided with a second locking ring with a notch; the limiting hole is disposed in the central shaft hole of the second transmission component; In the first position, the first locking block enters the notch of the first locking ring, so that the first transmission member and the first winding wheel form a circumferential limiting engagement; the second locking spring pushes the second locking block away from the notch of the second locking ring, so that the second transmission member and the second winding wheel are circumferentially unlocked; In the second position, the second locking block enters the notch of the second locking ring, so that the second transmission member and the second winding wheel form a circumferential limiting engagement; the first locking spring pushes the first locking block away from the notch of the first locking ring, so that the first transmission member and the first winding wheel are circumferentially unlocked.

[0012] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a third bearing is provided between the first transmission component and the first spring base; a fourth bearing is provided between the second transmission component and the second spring base.

[0013] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a handle is fixed at the end of the transmission shaft to control the axial movement of the transmission shaft and switch between the first position and the second position.

[0014] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is: it further includes a first limiter and a second limiter; The first winding assembly is provided with a first master gear, and the first limiter is provided with a first slave gear, and the first master gear meshes with the first slave gear; The second winding assembly is provided with a second main gear, and the second limiter is provided with a second driven gear, the second main gear meshing with the second driven gear; The first limiter and the second limiter respectively limit the number of rotations of the first winding assembly and the second winding assembly, and are used to limit the upper and lower limits of the lifting and lowering of the first and second drying rods.

[0015] Another technical solution adopted by this utility model to solve the above-mentioned technical problems is: an electric lifting drying rod, including a first drying rod, a second drying rod, a first steel wire rope, a second steel wire rope, a control box, and an electric lifting drying rod pull-out switching mechanism installed in the control box; The first drying rod is connected to the first winding assembly via the first steel wire rope; the second drying rod is connected to the second winding assembly via the second steel wire rope. The control box is equipped with buttons to control the forward and reverse rotation of the drive motor.

[0016] Compared with the prior art, the advantages of this utility model are: by using a pull-out switching device, the lifting and lowering control of the drying rack can be achieved by using only one drive motor; by using a transmission shaft that can move axially between the first and second positions, the operation can be switched to the drying rack that needs to be controlled for lifting and lowering by pulling it out, which is very convenient and can be done in one step; by using the transmission shaft to establish circumferential limits with the transmission gear and the first winding assembly at the same time, or to establish circumferential limits with the transmission gear and the second winding assembly at the same time, the drive structure and components can be greatly simplified, the cost can be reduced, and the mechanism can be made lightweight. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 A schematic diagram of the structure of an electric lifting drying rack; Figure 2 for Figure 1 A magnified view of a portion at point A; Figure 3 Schematic diagram of the electric lifting and pulling switching mechanism for the drying rack Figure 1 ; Figure 4 Schematic diagram of the electric lifting and pulling switching mechanism for the drying rack Figure 2 Figure 5 Disassembly of the pull-out switching mechanism for electric lifting drying racks Figure 1 ; Figure 6 Disassembly of the pull-out switching mechanism for electric lifting drying racks Figure 2 ; Figure 7 Disassembly of the pull-out switching mechanism for electric lifting drying racks Figure 3 ; Figure 8 Disassembly of the pull-out switching mechanism for electric lifting drying racks Figure 4 ; Figure 9 Cross-sectional view of the pull-out switching mechanism for the electric lifting drying rack Figure 1 ; Figure 10 Cross-sectional view of the pull-out switching mechanism for the electric lifting drying rack Figure 2 ; Explanation of reference numerals in the attached figures: Electric lifting drying rack 200, first drying rack 211, second drying rack 212, first wire rope 221, second wire rope 222, control box 230, first button 231, second button 232, electric lifting drying rack pull-out switching mechanism 100, drive motor 110, output shaft 111, drive gear 112, pull-out switching device 120, first winding assembly 10, first winding wheel 11, first self-locking assembly 12, first transmission component 13, first locking block 13a, first spring base 14, first locking spring 15, first locking ring 16 (first locking... (Ring) Notch 16a, third bearing 17, first main gear 18, second winding assembly 20, second winding wheel 21, second self-locking assembly 22, second transmission component 23, second locking block 23a, second spring base 24, second locking spring 25, fourth bearing 27, second main gear 28, transmission shaft 30, limit rod 31, handle 32, transmission gear 40, first bearing 41, second bearing 42, central shaft hole k, limit hole k1, pull-out switching channel r, first limiter 50, first driven gear 51, second limiter 60, second driven gear 61. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1 The electric lifting drying rack 200 provided in this embodiment includes a first drying rack 211, a second drying rack 212, a first steel wire rope 221, a second steel wire rope 222, a control box 230, and an electric lifting drying rack pull-out switching mechanism 100 disposed in the control box 230.

[0021] The first drying rod 211 and the second drying rod 212 are respectively connected to the electric lifting drying rod pull-out switching mechanism 100 inside the control box 230 via the first wire rope 221 and the second wire rope 222. The control box 230 has two buttons 231 and 232 on its operation panel, which control the raising and lowering of the drying rods, respectively. Pressing the first button 231 raises the drying rod, pressing the second button 232 lowers it, and releasing buttons 231 and 232 stops the drying rods.

[0022] like Figure 2 , Figure 3 , Figure 9 and Figure 10As shown, the electric lifting drying rack pull-out switching mechanism 100 includes a drive motor 110 and a pull-out switching device 120.

[0023] like Figures 5 to 10 As shown, the pull-out switching device 120 includes a drive shaft 30, a drive gear 40, a first winding assembly 10, and a second winding assembly 20. The first winding assembly 10 and the second winding assembly 20 are coaxially arranged on both sides of the drive gear 40, and the drive shaft 30 passes through the rotation axis of the first winding assembly 10, the drive gear 40, and the second winding assembly 20 in sequence. Here, the rotation axis is not a physical structure, but a virtual rotation center axis when the components rotate circumferentially.

[0024] The drive shaft 30 has a circumferential limiting structure with the drive gear 40, the first winding assembly 10 and the second winding assembly 20. That is, when the circumferential limiting structures between the drive shaft 30 and the drive gear 40, the drive shaft 30 and the first winding assembly 10, and the drive shaft 30 and the second winding assembly 20 cooperate with each other, the two are circumferentially limited, so that the two can rotate together circumferentially.

[0025] like Figure 4 , Figure 9 and Figure 10 As shown, a drive gear 112 is provided on the output shaft 111 of the drive motor 110. The drive gear 112 meshes with the transmission gear 40. When the drive motor 110 starts, the output shaft 111 drives the drive gear 112 to rotate, thereby the drive motor 110 drives the transmission gear 40 to rotate through the drive gear 112.

[0026] The first drying rod 211 is connected to the first winding assembly 10 via a first steel wire rope 221, and the second drying rod 212 is connected to the second winding assembly 20 via a second steel wire rope 222. When the first winding assembly 10 rotates clockwise or counterclockwise, the first steel wire rope 221 winds up or unwinds and releases, thereby raising or lowering the first drying rod 211. Similarly, when the second winding assembly 20 rotates clockwise or counterclockwise, the second steel wire rope 222 winds up or unwinds and releases, thereby raising or lowering the second drying rod 212.

[0027] like Figure 9 and Figure 10 As shown, the drive shaft 30 can move axially to, for example, Figure 9 The first position shown and as Figure 10 Switching between the second position shown. In the first position, the drive shaft 30 is simultaneously engaged with the drive gear 40 and the first winding assembly 10 in a circumferential limiting manner. When the drive motor 110 drives the drive gear 40 to rotate through the drive gear 112, the drive gear 40 drives the first winding assembly 10 to rotate through the drive shaft 30, which is used to control the raising and lowering of the first drying rod 211.

[0028] Similarly, in the second position, the drive shaft 30 simultaneously engages with the drive gear 40 and the second winding assembly 20 in a circumferential limiting manner. When the drive motor 110 drives the drive gear 40 to rotate via the drive gear 112, the drive gear 40 drives the second winding assembly 20 to rotate via the drive shaft 30, thereby controlling the raising and lowering of the second drying rod 212. The user can switch between the first and second positions by pulling the drive shaft 30, thus switching to the drying rod that requires individual control of its raising and lowering.

[0029] The two buttons 231 and 232 on the control box 230 control the raising and lowering of the drying rack by controlling the drive motor 110. Pressing the first button 231 causes the drive motor 110 to rotate forward, pressing the second button 232 causes the drive motor 110 to rotate in reverse, and releasing the buttons 231 and 232 causes the drive motor 110 to stop.

[0030] Therefore, the electric lifting drying rack pull-out switching mechanism provided by this utility model enables the independent, electric lifting and lowering control of the drying rack using only one drive motor through a pull-out switching device. The transmission shaft, which can move axially between a first position and a second position, allows for easy switching to the drying rack requiring individual lifting and lowering control via a pull-out mechanism, making operation very convenient and seamless. Furthermore, by simultaneously establishing circumferential limits with the transmission shaft, transmission gear, and first winding assembly, or simultaneously establishing circumferential limits with the transmission gear and second winding assembly, the drive switching mechanism can be significantly simplified, reducing costs and achieving lightweight design.

[0031] like Figures 5 to 10 As shown, the rotation centers of the transmission gear 40, the first winding assembly 10, and the second winding assembly 20 are all provided with central shaft holes k, and the transmission shaft 30 passes through the central shaft holes k of the first winding assembly 10, the transmission gear 40, and the second winding assembly 20 in sequence. The circumferential limiting structure includes a limiting rod portion 31 on the transmission shaft 30, and a limiting hole portion k1 provided in the central shaft holes k of the transmission gear 40, the first winding assembly 10, and the second winding assembly 20.

[0032] In the first position, the limiting rod portion 31 of the drive shaft 30 is simultaneously located within the limiting hole portion k1 of the drive gear 40 and the first winding assembly 10, forming a circumferential limiting fit. In the second position, the limiting rod portion 31 of the drive shaft 30 is simultaneously located within the limiting hole portion k1 of the drive gear 40 and the second winding assembly 20, forming a circumferential limiting fit.

[0033] Preferably, such as Figure 5 , Figure 6 and Figure 8As shown, the cross-section of the limiting rod portion 31 on the drive shaft 30 is a regular hexagon, and the cross-section of the limiting hole portion k1 of the drive gear 40, the first winding assembly 10, and the second winding assembly 20 is a regular hexagon. In other embodiments, the cross-sections of the limiting rod portion 31 and the limiting hole portion k1 can also be other regular polygons such as equilateral triangles, squares, and regular octagons. Regular hexagons are commonly used and are easy to manufacture.

[0034] like Figure 9 and Figure 10 As shown, in this embodiment, the entire central shaft hole k of the transmission gear 40 is configured as a regular hexagonal limiting hole portion k1, and the limiting rod portion 31 of the transmission shaft 30 is always circumferentially limited and engaged with it. The section of the central shaft hole k of the first winding assembly 10 and the second winding assembly 20 near the transmission gear 40 is configured as a regular hexagonal limiting hole portion k1. The three limiting hole portions k1 pass through to form a pull-out switching channel r. When the transmission shaft 30 moves axially, its limiting rod portion 31 moves axially within the pull-out switching channel r. The two ends of the pull-out switching channel r form axial limits to restrict the amplitude of the axial movement of the transmission shaft 30.

[0035] like Figure 5 and Figure 9 As shown, a first bearing 41 is provided between the transmission gear 40 and the first winding assembly 10, and a second bearing 42 is provided between the transmission gear 40 and the second winding assembly 20. When the transmission gear 40 rotates relative to the first winding assembly 10 or the second winding assembly 20 (for example, when the limiting rod 31 of the transmission shaft 30 is simultaneously located in the limiting hole k1 of the transmission gear 40 and the first winding assembly 10 and forms a circumferential limiting fit, the transmission gear 40 and the second winding assembly 20 may rotate relative to each other), the first bearing 41 and the second bearing 42 of the transmission gear 40 and the first winding assembly 10 can reduce the friction.

[0036] like Figure 5 and Figure 6 As shown, the first winding assembly 10 includes a first winding wheel 11 on which a first steel wire rope 221 is wound, and a first self-locking assembly 12 sleeved within the first winding wheel 11. The second winding assembly 20 includes a second winding wheel 21 on which a second steel wire rope 222 is wound, and a second self-locking assembly 22 sleeved within the second winding wheel 21. The limiting hole k1 of the first winding assembly 10 is disposed within the central shaft hole k of the first self-locking assembly 12, and the limiting hole k1 of the second winding assembly 20 is disposed within the central shaft hole k of the second self-locking assembly 22.

[0037] In the first position, the first self-locking assembly 12 is circumferentially locked to the first winding wheel 11. The drive shaft 30 drives the first self-locking assembly 12 to rotate, thereby causing the first winding wheel 11 to rotate and wind up and unwind the first wire rope 221. At this time, the second self-locking assembly 22 is circumferentially unlocked to the second winding wheel 21.

[0038] In the second position, the second self-locking component 22 is circumferentially locked to the second winding wheel 21. The transmission shaft 30 drives the second self-locking component 22 to rotate, thereby driving the second winding wheel 21 to rotate and wind up and unwind the second wire rope 222. At this time, the first self-locking component 12 is circumferentially unlocked to the first winding wheel 11.

[0039] Furthermore, such as Figure 7 and Figure 8 As shown, the first self-locking assembly 12 includes a first transmission member 13, a first spring base 14, and a first locking spring 15 disposed on the first spring base 14. The first transmission member 13 is provided with a first locking block 13a, and the first winding wheel 11 is provided with a first locking ring 16 with a notch 16a. A limiting hole k1 is disposed within the central shaft hole k of the first transmission member 13.

[0040] Similarly, the second self-locking assembly 22 includes a second transmission member 23, a second spring base 24, and a second locking spring 25 disposed on the second spring base 24. The second transmission member 23 is provided with a second locking block 23a, and the second winding wheel 21 is provided with a second locking ring (not shown in the figure) with a notch (not shown in the figure). A limiting hole k1 is disposed within the central shaft hole k of the second transmission member 23.

[0041] In the first position, the first locking block 13a enters the notch 16a of the first locking ring 16, so that the first transmission member 13 and the first winding wheel 11 form a circumferential limiting engagement. The second locking spring 25 pushes the second locking block 23a away from the notch of the second locking ring, so that the second transmission member 23 and the second winding wheel 21 are circumferentially unlocked.

[0042] In the second position, the second locking block 23a enters the notch of the second locking ring, so that the second transmission member 23 and the second winding wheel 21 form a circumferential limiting engagement. The first locking spring 15 pushes the first locking block 13a away from the notch 16a of the first locking ring 16, so that the first transmission member 13 and the first winding wheel 11 are circumferentially unlocked.

[0043] like Figure 7 , Figure 8 and Figure 10 As shown, a third bearing 17 is provided between the first transmission component 13 and the first spring base 14, and a fourth bearing 27 is provided between the second transmission component 23 and the second spring base 24. The arrangement of the third bearing 17 and the fourth bearing 27 can reduce the frictional force when the transmission component and the spring base rotate relative to each other in the circumferential direction.

[0044] like Figures 2 to 6 , Figure 9 and Figure 10 As shown, a handle 32 is fixed to the end of the drive shaft 30 to control the axial movement of the drive shaft 30 and switch between a first position and a second position. The handle 32 is exposed on the operation panel of the control box 230 for easy pulling operation by the user.

[0045] like Figure 2 As shown, the electric lifting drying rack pull-out switching mechanism 100 also includes a first limiter 50 and a second limiter 60. A first main gear 18 is provided on the first winding assembly 10, and a first driven gear 51 is provided on the first limiter 50; the first main gear 18 meshes with the first driven gear 51. The first main gear 18 is located on the outer periphery of the first winding reel 11. Similarly, a second main gear 28 is provided on the second winding assembly 20, and a second driven gear 61 is provided on the second limiter 60; the second main gear 28 meshes with the second driven gear 61. The second main gear 28 is located on the outer periphery of the second winding reel 21.

[0046] The first limiter 50 and the second limiter 60 respectively limit the number of rotations of the first winding assembly 10 and the second winding assembly 20, and are used to limit the upper and lower limits of the lifting and lowering of the first drying rod 211 and the second drying rod 212.

[0047] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0048] The above describes the electric lifting drying rack pull-out switching mechanism and the electric lifting drying rack provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An electric lifting and pulling-out switching mechanism for a drying rack, characterized in that: Includes a drive motor and a pull-out switching device; The pull-out switching device includes a drive shaft, a drive gear, a first winding assembly, and a second winding assembly; the first winding assembly and the second winding assembly are coaxially arranged on both sides of the drive gear, and the drive shaft passes through the rotation axis of the first winding assembly, the drive gear, and the second winding assembly in sequence; The drive shaft has a circumferential limiting structure with respect to the drive gear, the first winding assembly, and the second winding assembly; The output shaft of the drive motor is provided with a drive gear, which meshes with the transmission gear. The drive motor drives the transmission gear to rotate via the drive gear; The drive shaft is axially movable to switch between a first position and a second position; In the first position, the drive shaft is simultaneously engaged with the drive gear and the first winding assembly in a circumferential limiting manner. The drive gear drives the first winding assembly to rotate through the drive shaft, thereby controlling the raising and lowering of the first drying rod. In the second position, the drive shaft simultaneously engages with the drive gear and the second winding assembly in a circumferential limiting manner. The drive gear drives the second winding assembly to rotate via the drive shaft, thereby controlling the raising and lowering of the second drying rod.

2. The electric lifting drying rack pull-out switching mechanism according to claim 1, characterized in that: The rotation centers of the transmission gear, the first winding assembly, and the second winding assembly are all provided with central shaft holes; the transmission shaft passes through the central shaft holes of the first winding assembly, the transmission gear, and the second winding assembly in sequence. The circumferential limiting structure includes a limiting rod portion on the transmission shaft, and a limiting hole portion provided in the central shaft hole of the transmission gear, the first winding assembly, and the second winding assembly; In the first position, the limiting rod portion of the drive shaft is simultaneously located within the limiting hole portion of the drive gear and the first winding assembly, forming a circumferential limiting fit. In the second position, the limiting rod portion of the drive shaft is simultaneously located within the limiting holes of the drive gear and the second winding assembly, forming a circumferential limiting fit.

3. The electric lifting drying rack pull-out switching mechanism according to claim 2, characterized in that: The cross-section of the limiting rod on the drive shaft is a regular hexagon; The cross-sections of the limiting holes of the transmission gear, the first winding assembly, and the second winding assembly are regular hexagonal.

4. The electric lifting drying rack pull-out switching mechanism according to claim 1, characterized in that: A first bearing is provided between the transmission gear and the first winding assembly; a second bearing is provided between the transmission gear and the second winding assembly.

5. The electric lifting drying rack pull-out switching mechanism according to claim 2, characterized in that: The first winding assembly includes a first winding wheel on which a first steel wire rope is wound and a first self-locking assembly sleeved inside the first winding wheel; The second winding assembly includes a second winding wheel on which a second steel wire rope is wound and a second self-locking assembly sleeved inside the second winding wheel; The limiting hole of the first winding assembly is disposed in the central shaft hole of the first self-locking assembly, and the limiting hole of the second winding assembly is disposed in the central shaft hole of the second self-locking assembly; In the first position, the first self-locking component is circumferentially locked to the first winding wheel, and the transmission shaft drives the first self-locking component to rotate, thereby driving the first winding wheel to rotate and winding and unwinding the first wire rope. The second self-locking component is circumferentially unlocked from the second winding wheel; In the second position, the second self-locking component and the second winding wheel are circumferentially locked, and the drive shaft drives the second self-locking component to rotate, thereby driving the second winding wheel to rotate and wind up and unwind the second wire rope; the first self-locking component and the first winding wheel are circumferentially unlocked.

6. The electric lifting drying rack pull-out switching mechanism according to claim 5, characterized in that: The first self-locking assembly includes a first transmission member, a first spring base, and a first locking spring disposed on the first spring base; the first transmission member is provided with a first locking block, and the first winding wheel is provided with a first locking ring with a notch; the limiting hole is disposed in the central shaft hole of the first transmission member; The second self-locking assembly includes a second transmission member, a second spring base, and a second locking spring disposed on the second spring base; the second transmission member is provided with a second locking block, and the second winding wheel is provided with a second locking ring with a notch; the limiting hole is disposed in the central shaft hole of the second transmission member; In the first position, the first locking block enters the notch of the first locking ring, so that the first transmission member and the first winding wheel form a circumferential limiting engagement; the second locking spring pushes the second locking block away from the notch of the second locking ring, so that the second transmission member and the second winding wheel are circumferentially unlocked; In the second position, the second locking block enters the notch of the second locking ring, so that the second transmission member and the second winding wheel form a circumferential limiting engagement; the first locking spring pushes the first locking block away from the notch of the first locking ring, so that the first transmission member and the first winding wheel are circumferentially unlocked.

7. The electric lifting drying rack pull-out switching mechanism according to claim 6, characterized in that: A third bearing is provided between the first transmission component and the first spring base; a fourth bearing is provided between the second transmission component and the second spring base.

8. The electric lifting drying rack pull-out switching mechanism according to claim 1, characterized in that: A handle is fixed to the end of the drive shaft to control the axial movement of the drive shaft and switch between a first position and a second position.

9. The electric lifting drying rack pull-out switching mechanism according to claim 1, characterized in that: It also includes a first limiter and a second limiter; The first winding assembly is provided with a first master gear, and the first limiter is provided with a first slave gear, and the first master gear meshes with the first slave gear; The second winding assembly is provided with a second main gear, and the second limiter is provided with a second driven gear, the second main gear meshing with the second driven gear; The first limiter and the second limiter respectively limit the number of rotations of the first winding assembly and the second winding assembly, and are used to limit the upper and lower limits of the lifting and lowering of the first drying rod and the second drying rod.

10. An electric lifting drying rack, characterized in that: It includes a first drying rod, a second drying rod, a first steel wire rope, a second steel wire rope, a control box, and an electric lifting drying rod pull-out switching mechanism as described in any one of claims 1-9, which is installed in the control box; The first drying rod is connected to the first winding assembly via the first steel wire rope; the second drying rod is connected to the second winding assembly via the second steel wire rope. The control box is equipped with buttons to control the forward and reverse rotation of the drive motor.

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