Transmission device of clothes airing machine and clothes airing machine

Abstract

The transmission device is connected between a driving group and a frame body and comprises two traction rope groups, one ends of the two traction rope groups are connected with the driving group respectively, the other ends of the two traction rope groups extend outwards from the two sides of the driving group in the length direction respectively, and the transmission device further comprises two guide wheel groups, the two guide wheel sets are arranged outside the two sides of the driving set in the length direction respectively. The traction rope set comprises two traction ropes, the ends of the two traction ropes of the traction rope set extend outwards from the two sides of the driving set in the width direction and then pass through the guide wheel set, and the guide wheel set guides the two traction ropes to extend oppositely, get close to each other and then be connected with the middle of the frame body in the width direction. The safety and the reliability of the clothes airing machine are improved.

Description

Technical Field

[0001] This utility model relates to the field of clothes drying racks, and in particular to a transmission device and a clothes drying machine. Background Technology

[0002] Traditional electric clothes drying racks typically use a single-sided, single-wire rope design. This design involves a wire rope extending from a transmission module, passing through pulleys at both ends of the main unit, and finally being fixed to a clothes rack below the main unit. The motor drives the transmission module, which in turn drives a winding system to raise or lower the wire rope, thus achieving the lifting and lowering function of the clothes rack. Figure 1 As shown.

[0003] However, this design carries the risk of fatigue fracture of the wire ropes under prolonged use or heavy loads. If the wire rope breaks, the clothes rack may fall, causing property damage or even personal injury. To address this issue, a double-sided, double-wire-rope design has emerged on the market. This design uses four wire ropes, each connected to one of four locations on the frame, allowing the four wire ropes to bear the load simultaneously, thus extending their service life.

[0004] Nevertheless, the double-sided double-wire rope design still carries the risk of wire rope breakage. If one wire rope breaks, the clothes rack will experience uneven stress, potentially leading to tipping over. Therefore, while the double-sided double-wire rope design improves safety to some extent, further improvements are needed to reduce the risk of tipping over and extend its service life. Utility Model Content

[0005] The main purpose of this utility model is to overcome the defects of existing clothes drying machines that fall or tip over due to the breakage of steel wire ropes, and to propose a transmission device and clothes drying machine to improve the safety and reliability of the clothes drying machine.

[0006] The present invention adopts the following technical solution:

[0007] A transmission device for a clothes drying rack, connected between a drive unit and a frame, includes two traction rope groups, one end of each traction rope group being connected to the drive unit, and the other ends of each traction rope group extending outward from both sides of the drive unit along its length. The device is characterized by further including two guide wheel groups, each arranged on both sides of the drive unit along its length. Each traction rope group includes two traction ropes, the ends of which extend outward from both sides of the drive unit along its width and pass through the guide wheel groups. The guide wheel groups guide the two traction ropes to extend towards each other and approach each other before connecting to the middle of the frame along its width.

[0008] The guide wheel assembly includes a first guide wheel, which is located above the end of the frame along its length; the two traction ropes of the traction rope assembly pass through the corresponding first guide wheels to bring them closer together.

[0009] The guide wheel assembly also includes two second guide wheels, which are located between the drive assembly and the first guide wheel and are spaced apart along the width of the drive assembly. The two traction ropes of the traction rope assembly pass through the corresponding second guide wheels and then through the first guide wheel to extend towards each other.

[0010] The first guide wheel or the second guide wheel includes a base and two rollers; the two rollers are rotatably mounted on the base and spaced apart along the width direction of the drive group; a partition is also provided on the base to separate the two rollers, and there is a gap between the partition and the rollers to allow the traction rope to pass through.

[0011] The guide wheel assembly includes pulleys, which are located above the middle of the frame in the width direction and have two grooves. The two traction ropes of the traction rope assembly are wound around the two grooves to change their extension direction and connect to the frame.

[0012] A clothes drying rack includes a drive unit, a frame, a main unit, and a telescopic unit; the telescopic unit is connected between the main unit and the frame, and the drive unit is installed on the main unit; it also includes a transmission device for the clothes drying rack, with a guide wheel assembly installed on the main unit, which drives the traction rope assembly and the telescopic unit to move, causing the frame to rise or fall relative to the main unit.

[0013] The telescopic assembly includes two scissor lifts, which are spaced apart along the length of the frame. One end of each scissor lift is connected to the main unit. Two connecting rods are installed on the frame to connect to the other ends of the two scissor lifts respectively. The ends of the two traction ropes of the traction rope assembly are connected to the corresponding connecting rods.

[0014] It also includes a connector, which is rotatably connected to the middle of the connecting rod and has a mounting groove for the ends of the two traction ropes to be inserted. The rotation axis of the connector is perpendicular to the arrangement direction of the two traction ropes, so that when the clothes drying rack is raised and lowered, the connector rotates around the rotation axis and automatically balances the tension of the two traction ropes.

[0015] The drive unit includes a motor unit and two winding wheel sets. One end of the traction rope is wound around the corresponding winding wheel set. The motor unit is connected to drive the winding wheel set to rotate, thereby driving the traction rope set to move.

[0016] The reel assembly has two reels; the two traction ropes of the traction rope assembly are wound one-to-one around the two reels of the reel assembly.

[0017] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:

[0018] 1. In this utility model, two traction rope groups and two guide wheel groups are provided. Each traction rope group is provided with two traction ropes. The ends of the two traction ropes of the traction rope group extend outward from both sides in the width direction of the drive group and pass through the guide wheel group. The guide wheel group guides the two traction ropes to extend towards each other and then connect to the middle part in the width direction of the frame. Both traction ropes are under force and are transmitted. If one of the traction ropes breaks, the other traction rope can still play a load-bearing role, ensuring that the frame is stable and not easy to overturn, which improves the durability of the overall structure. Due to the redundant design, the maintenance frequency caused by wire rope breakage is reduced, and the maintenance cost is reduced.

[0019] 2. In this utility model, the guide wheel assembly includes a first guide wheel and a second guide wheel. By setting the first guide wheel and the second guide wheel, the direction of the traction rope's outlet is adjusted and the two are brought closer to each other in the extension direction to the upper part of the middle in the width direction of the frame, ensuring the stability and reliability of the traction rope assembly transmission, reducing vibration and noise, and improving the user experience.

[0020] 3. In this utility model, the guide wheel group is also equipped with a pulley. The pulley is located above the middle part of the width direction of the frame and is provided with two sliding grooves. The two traction ropes of the traction rope group are respectively wrapped around the two sliding grooves, realizing the synchronous guidance and support of the two traction ropes. This not only improves the stability of the clothes rack, but also ensures the synchronicity of the two ropes when under force, avoiding safety hazards caused by uneven force on a single rope.

[0021] 4. In this utility model, the frame is provided with two connecting rods to be connected to the telescopic group respectively; the ends of the two traction ropes of the traction rope group are connected to the corresponding connecting rods; the connecting rods are also provided with connectors with mounting grooves, and the ends of the traction ropes are connected by being embedded in the mounting grooves through the connecting parts, which can firmly clamp the two wire ropes and prevent them from loosening or falling off during use.

[0022] 5. In this utility model, the connector is provided with a rod and a connecting block. The rod is rotatably connected to the connecting rod, and the connecting block is connected to the rod and is provided with two symmetrical mounting grooves opposite to the rod. The connector adopts this symmetrical structure that can rotate around the axis, which can ensure that the double traction ropes are evenly stressed and are not affected by the length of the traction ropes. Moreover, this locking mechanism simplifies the connection structure, reduces the number of parts, and not only improves the compactness and aesthetics of the overall structure, but also facilitates installation and maintenance.

[0023] 6. In this utility model, two limiting members are also provided on the telescopic assembly. The two limiting members are respectively provided with limiting holes for the two traction rope assemblies to pass through, which plays a limiting role, reduces assembly steps, and reduces costs and increases efficiency. Attached Figure Description

[0024] Figure 1 Here is a structural diagram of an existing clothes drying rack;

[0025] Figure 2 The transmission device structure of this utility model Figure 1 ;

[0026] Figure 3 This is a diagram showing the routes of the two traction ropes in the traction rope assembly;

[0027] Figure 4 This is an enlarged view of the end of the traction rope;

[0028] Figure 5 This is a structural diagram of the first or second guide wheel;

[0029] Figure 6 Here is a diagram of the pulley structure;

[0030] Figure 7 Here is a structural diagram of the limiting component;

[0031] Figure 8 Here is a structural diagram of the connector;

[0032] Figure 9 for Figure 5 Exploded view;

[0033] Figure 10 Transmission device structure Figure 2 ;

[0034] Figure 11 This is a diagram of the drive group structure;

[0035] Figure 12 for Figure 11 A magnified view of a portion of the image;

[0036] Figure 13 This is a structural diagram of the transmission device of this utility model installed on a clothes drying rack;

[0037] Figure 14 This is a structural diagram of the clothes drying rack of this utility model.

[0038] in:

[0039] 10. Drive assembly; 11. Micro switch; 12. Elastic rocker; 20. Frame; 21. Connecting rod; 22. Connector; 23. Rod body; 24. Connecting block; 25. Through hole; 26. Mounting groove; 30. Traction rope assembly; 31. Traction rope; 32. Connecting part; 40. Guide wheel assembly; 41. Second guide wheel; 42. First guide wheel; 43. Pulley; 44. Base; 45. Roller; 46. Slide groove; 47. Partition; 50. Main unit; 60. Telescopic assembly; 61. Limiting component; 62. Limiting hole. Detailed Implementation

[0040] The present invention will be further described below through specific embodiments.

[0041] See Figures 13-14 This utility model discloses a clothes drying rack, comprising a drive unit 10, a frame 20, a main unit 50, and a telescopic unit 60. The frame 20 is equipped with drying rods and connecting rods 21, etc., and the drying rods have hooks for hanging clothes. The main unit 50 is located above the frame 20, and the telescopic unit 60 is connected between the connecting rods 21 of the main unit 50 and the frame 20 and is telescopic. The drive unit 10 is installed on the main unit 50 and located at the middle of the length of the main unit 50. The drive unit 10, in conjunction with a transmission device, pulls the frame 20 up or down. When the frame 20 rises or falls, it drives the telescopic unit 60 to retract or extend.

[0042] See Figures 2 to 12 This utility model also proposes a transmission device for a clothes drying rack, connected between the drive unit 10 and the frame 20, which includes two traction rope groups 30 and two guide wheel groups 40. One end of each of the two traction rope groups 30 is connected to the drive unit 10, and the other end of each traction rope group 30 extends outward from both sides of the drive unit 10 along its length. The guide wheel groups 40 are respectively arranged on both sides of the drive unit 10 along its length and are spaced apart from the drive unit 10. The traction rope group 30 includes two traction ropes 31 arranged along the width direction of the frame 20. The ends of the two traction ropes 31 extend outward from both sides of the drive unit 10 along its width direction and pass through the guide wheel groups 40. The guide wheel groups 40 guide the two traction ropes 31 to extend towards each other and then connect to the connecting rod 21 in the middle of the width direction of the frame 20. The drive unit 10 drives the traction rope groups 30 to move, causing the frame 20 to rise or fall relative to the main unit 50.

[0043] The traction rope 31 can be made of steel wire rope. The two traction ropes 31 of the traction rope group 30 are led out from different positions on one side of the drive group 10, guided by the guide wheel group 40 until they are close to each other and then connected to the frame 20. Then both traction ropes 31 are driven and synchronously stressed. If one traction rope 31 breaks, the other traction rope 31 can continue to be stressed, ensuring that the frame 20 is stable and does not tip over. The frame 10 is stressed in the middle, which extends its service life.

[0044] In this embodiment, the drive group 10 can be implemented using an existing drive structure, such as a motor group and two reel groups. One end of the traction rope 31 of the traction rope group 30 is wound around the corresponding reel group. The motor group is connected to drive the reel groups to rotate, thereby driving the traction rope group 30 to move. Specifically, the reel group can be one reel or two reels. The two traction ropes 31 of the traction rope group 30 are wound around one reel or respectively wound around two reels, so that the two traction ropes 31 of the traction rope group 30 extend outward from both sides in the width direction of the drive group 10. Two outlets are provided on both sides in the width direction of the drive group 30 for the traction ropes 31 to pass through. The motor group can be one motor or two motors. One motor can drive the two reel groups to rotate through a gear transmission structure, or two motors can drive the two reel groups to rotate through gear transmission structures, etc. The specific configuration can be set according to the actual situation and is not limited here.

[0045] The guide wheel assembly 40 is mounted on the main unit 50, and the two guide wheel assemblies 40 are symmetrically arranged relative to the drive assembly 10. The guide wheel assembly 40 is used to guide the two traction ropes 21 of the traction rope assembly 30 to approach each other before connecting to the connecting rod 22 on the frame 20. The guide wheel assembly 40 can be implemented in several ways. The first type is that the guide wheel assembly 40 only has a pulley 43, which is located above the middle of the frame 20 in the width direction and has two sliding grooves 46. The two traction ropes 31 of the traction rope assembly 30 extend to wrap around the two sliding grooves 46 to change their extension direction before connecting to the frame 20. The second type is based on the first type by adding a first guide wheel 42, which is located above the end of the frame in the length direction. The two traction ropes 31 of the traction rope assembly 30 pass through the corresponding first guide wheel 42 to approach each other. See [link to relevant documentation]. Figure 10 The third method is to add two second guide wheels 41 based on the second method. The two second guide wheels 41 are located between the drive group 10 and the first guide wheel 42 and are spaced apart along the width direction of the drive group. The two traction ropes 31 of the traction rope group 30 pass through the corresponding second guide wheels 41 and then through the first guide wheel 42 to achieve opposite extension.

[0046] Figure 2 Taking the third method as an example: two second guide wheels 41 are spaced apart along the width direction of the drive group 10, and the first guide wheel 42 and the second guide wheel 41 are spaced apart along the length direction of the drive group 10, with the first guide wheel 42 located on the side of the second guide wheel 41 away from the drive group 10; the two traction ropes 31 pass through the corresponding second guide wheel 41 and then through the first guide wheel 42 to extend towards each other. By setting the second guide wheel 41 and the first guide wheel 42, the outgoing direction of the traction rope 31 is adjusted and they are brought closer to each other in the extension direction to the upper part of the middle of the width direction of the frame 20, ensuring the stability and reliability of the transmission of the traction rope group 30.

[0047] The second guide wheel 41 and the first guide wheel 42 may have the same or different structures; taking them as examples of being the same, see [link to relevant documentation]. Figure 5 and Figure 9 Both the second guide wheel 41 and the first guide wheel 42 include a base 44 and two rollers 45. The base 44 is fixed. The two rollers 45 are rotatably mounted on the base 44 and spaced apart along the width direction of the drive assembly 10. The rollers 45 are rotatable relative to the base 44, and their axes of rotation are perpendicular to both the length and width directions of the drive assembly 10. A partition 47 is also provided on the base 44 to separate the two rollers 45, i.e., the partition 47 is located between the two rollers 45, making the base 44 resemble an I-beam. There is a gap between the partition 47 and the rollers 45. The gap between one of the rollers 45 of the second guide wheel 41 and the partition 47 allows one of the traction ropes 31 of the traction rope assembly 30 to pass through. The gaps between the two rollers 45 of the first guide wheel 42 and the partition 47 allow both traction ropes 31 of the traction rope assembly 30 to pass through, thereby shortening the distance between the two traction ropes 31 in the width direction of the drive assembly 10. In other embodiments, the second guide wheel 41 has a different structure from the first guide wheel 42. The second guide wheel 41 may only include a partition and a roller 45, or the second guide wheel may be a fixed pulley.

[0048] Pulley 43 is positioned near the first guide wheel 42. The pivot of pulley 43 extends along the width of the drive assembly 10. Pulley 43 is used to change the extension direction of the traction rope 31 of the traction rope assembly 30, changing its extension direction from along the length of the drive assembly 10 to perpendicular to the length of the drive assembly 10 and extending towards the frame 20. Specifically, pulley 43 is located above the middle of the frame 20 in the width direction and is provided with two grooves 46. The two traction ropes 31 of the traction rope assembly 30 are respectively wound around the two grooves 46, realizing synchronous guidance and support for the two traction ropes 31. This not only improves the stability of the clothes rack but also ensures the synchronicity of the two ropes under force, avoiding safety hazards caused by uneven force on a single rope.

[0049] In this embodiment, the guide wheel assembly 40 uses a second guide wheel 41, a first guide wheel 42, and a pulley 43. The base 44 of the second guide wheel 41 and the first guide wheel 42 is fixed to the main unit 50, and the pulley 43 is rotatably connected to the main unit 50. By adjusting the direction of the traction rope 31 and precisely aligning it with the groove 46 of the pulley 43, the stability and reliability of the transmission connection between the drive assembly 10 and the frame 20 are ensured, effectively reducing the vibration and noise levels during operation.

[0050] In addition, the clothes drying rack has a gentle lifting function, see [link / reference]. Figure 11 and Figure 12At the outlet of the drive unit 10, there are spaced microswitches 11 and elastic rockers 12. The elastic rockers 12 have holes for the traction rope 31 to pass through. When the microswitches 11 are touched by the elastic rockers 12, they close. When the frame 20 is gently lifted and lowered, the traction rope 31 goes from a taut state to a relaxed state and then back to a taut state. The state of the microswitches 11 goes from open to closed and then open again. When the microswitches 11 go through the process of closing and opening, they trigger the frame 20 to rise, thus achieving the function of gently lifting and raising. The two second guide wheels 41 also ensure that when the traction rope 31 is led out of the outlet of the drive unit 10, it will not affect the function of the microswitches due to accidental contact with the elastic rockers 12.

[0051] The telescopic assembly 60 can be implemented using a scissor lift structure, a telescopic rod structure, or a folding rod structure. Taking the scissor lift structure as an example, it includes two scissor lifts spaced apart along the length of the frame 20. One end of each scissor lift is connected to the main unit 50, and the other end is connected to the frame 20. Two connecting rods 21 are provided on the frame 20 to connect to the two scissor lifts respectively, and these two connecting rods 21 are located near the two ends of the frame 20 along its length. Two traction rope groups 30 are connected to the two connecting rods 21 one-to-one, with the ends of the two traction ropes 31 of each traction rope group 30 connected to the middle of the corresponding connecting rod 21 to ensure the frame 20 remains stable. When the frame 20 rises, the telescopic assembly 60 retracts; when the frame 20 descends, the telescopic assembly 60 unfolds.

[0052] In this embodiment, two limiting members 61 are also included. The two limiting members 61 are respectively disposed on opposite sides of the two scissor lifts and have limiting holes 62. The two traction rope groups 30 pass through the corresponding limiting holes 62. The limiting members 61 are located near the middle of both ends of the scissor lifts. They can be fixed to the scissor lifts by welding or threading steel wires to form the limiting holes 62. The number of limiting holes 62 on the limiting member 61 can be one or two. If there is one, the two traction ropes 31 of the traction rope group 30 pass through the same limiting hole 62; if there are two, the two traction ropes 31 of the traction rope group 30 pass through the two limiting holes 62 respectively. During the assembly of the transmission device of this utility model, the two traction ropes 31 of the traction rope group 30 passing through the limiting holes 62 serve a limiting function, reducing assembly steps and increasing efficiency.

[0053] Furthermore, to better connect the traction rope assembly 30, a connector 22 is also provided on the connecting rod 21. The connector 22 is rotatably connected to the middle of the connecting rod 21 and has a mounting groove 26 for the end of the traction rope 31 to be inserted. The rotation axis of the connector 22 is perpendicular to the arrangement direction of the two traction ropes 31, so that when the clothes drying rack is raised and lowered, the connector 22 rotates around the rotation axis and automatically balances the tension of the two traction ropes. Specifically, the mounting groove 26 is a recess, and the top of the mounting groove 26 is provided with a through hole 25 for the traction rope 31 to pass through. The end of the traction rope 31 is provided with a connecting part 32, the shape of which is adapted to the mounting groove 26. The connector 22 and the traction rope 31 are connected by the connecting part 32 being embedded in the mounting groove 26, which can firmly clamp the two wire ropes and prevent them from loosening or falling off during use. See also Figure 4 and Figure 8 .

[0054] The connector 22 is provided with an integrally formed, fixed or detachably connected rod body 23 and a connecting block 24. A through hole is provided on the connecting rod 21, through which the rod body 23 passes and connects to the connecting rod 21. The connecting block 24 is located at the end of the rod body 23 and is provided with two mounting grooves 26. The connecting block 24 can be located on the side of the connecting rod 21. The two mounting grooves 26 are respectively located on both sides of the rod body 23, that is, the two mounting grooves 26 are symmetrically arranged relative to the rod body 23. The connecting parts 32 of the two traction ropes 31 of the traction rope assembly 30 are respectively embedded in the corresponding mounting grooves 26.

[0055] The connector 22 and the connecting rod 21 can be either fixedly connected or rotatably connected. For a rotatable connection, depending on the connection method between the rod 23 and the connecting block 24, different rotatable connections can be used between the connector 22 and the connecting rod 21. For example, the rod 23 can pass through a through hole in the connecting rod 21 for rotatable connection, and the connecting block 24 can be fixed to the end of the rod 23 by integral molding or screw fastening. Alternatively, one end of the connecting block 24 can be rotatably connected to the rod 23, and the other end of the rod 23 can pass through a through hole in the connecting rod 21 and be fixed to the connecting rod 21 by screw fastening.

[0056] Furthermore, the sidewall of the mounting slot 26 relative to the connecting rod 21 is designed as an opening, facilitating the insertion of the connecting part 32 from the side. After the rod 23 is inserted into the connector 22, the open side of the mounting slot 26 is closed by the corresponding side of the frame 20. The connector 22 employs this symmetrical, rotatable structure, ensuring uniform force distribution on the double traction ropes 31, unaffected by the length of the traction ropes 31. This locking mechanism simplifies the connection structure, reduces the number of parts, and not only improves the overall compactness and aesthetics of the structure but also facilitates installation and maintenance.

[0057] When the clothes rack of this utility model is in operation, the two traction rope groups 30 are connected to the frame body 20 through two traction ropes 31 respectively, and the guide wheel group 40 precisely guides the movement direction of the traction ropes 31, so that the force is concentrated in the middle of the frame body 20, thereby ensuring the stability and reliability of the connection and allowing the frame body 20 to rise and fall smoothly. If any traction rope 31 in the traction rope group 30 breaks due to fatigue from long-term use or other factors, the other traction rope 31 in the traction rope group 30 can still independently bear the load, ensuring that the frame body 20 will not suddenly fall and avoid accidents. At the same time, this design allows the clothes rack to continue to be used for a period of time after the traction rope 31 breaks, giving users time for repair and replacement, further improving safety and practicality.

[0058] The terms "first" and "second" used in this utility model are merely for ease of description and to distinguish different components with the same name, and do not indicate a sequential or primary / secondary relationship.

[0059] In the description of this utility model, the orientation or positional relationship indicated by terms such as "up", "down", "left", "right", "front" and "back" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and is not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this utility model.

[0060] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0061] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A transmission device for a clothes drying rack, connected between a drive unit and a frame, comprising two traction rope groups, one end of each traction rope group being connected to the drive unit, and the other ends of each traction rope group extending outward from both sides of the drive unit along its length, characterized in that... It also includes two guide wheel sets, which are respectively arranged on both sides of the drive group in the length direction; the traction rope group includes two traction ropes, and the ends of the two traction ropes of the traction rope group extend outward from both sides of the drive group in the width direction and pass through the guide wheel sets. The guide wheel sets guide the two traction ropes to extend towards each other and approach each other before connecting to the middle part of the frame in the width direction.

2. The transmission device for a clothes drying rack as described in claim 1, characterized in that: The guide wheel assembly includes a first guide wheel, which is located above the end of the frame in the length direction; the two traction ropes of the traction rope assembly pass through the corresponding first guide wheels to bring them closer to each other.

3. The transmission device for a clothes drying rack as described in claim 2, characterized in that: The guide wheel assembly also includes two second guide wheels, which are located between the drive assembly and the first guide wheel and are spaced apart along the width direction of the drive assembly. The two traction ropes of the traction rope assembly pass through the corresponding second guide wheels and then through the first guide wheel to extend towards each other.

4. The transmission device for a clothes drying rack as described in claim 3, characterized in that: The first guide wheel or the second guide wheel includes a base and two rollers; the two rollers are rotatably disposed on the base and spaced apart along the width direction of the drive group; a partition is also provided on the base to separate the two rollers, and there is a gap between the partition and the rollers to allow the traction rope to pass through.

5. The transmission device for a clothes drying rack as described in claim 1, characterized in that: The guide wheel assembly includes a pulley, which is located above the middle of the frame in the width direction and has two grooves. The two traction ropes of the traction rope assembly are respectively wound around the two grooves to change their extension direction and connect to the frame.

6. A clothes drying rack, comprising a drive unit, a frame, a main unit, and a telescopic assembly; the telescopic assembly is connected between the main unit and the frame, and the drive unit is mounted on the main unit; characterized in that: It also includes a transmission device for a clothes drying rack according to any one of claims 1 to 5, wherein the guide wheel assembly is mounted on the main unit, and the drive assembly drives the traction rope assembly and the telescopic assembly to move the frame relative to the main unit to rise or fall.

7. A clothes drying rack as described in claim 6, characterized in that: The telescopic assembly includes two scissor lifts, which are spaced apart along the length of the frame. One end of each scissor lift is connected to the main unit. Two connecting rods are provided on the frame to connect to the other ends of the two scissor lifts respectively. The ends of the two traction ropes of the traction rope assembly are connected to the corresponding connecting rods.

8. A clothes drying rack as described in claim 7, characterized in that: It also includes a connector, which is rotatably connected to the middle of the connecting rod and has a mounting groove for the ends of the two traction ropes to be inserted. The rotation axis of the connector is perpendicular to the arrangement direction of the two traction ropes, so that when the clothes drying machine is raised and lowered, the connector rotates around the rotation axis and automatically balances the tension of the two traction ropes.

9. A clothes drying rack as described in claim 6, characterized in that: The drive unit includes a motor unit and two reel sets. One end of each traction rope is wound around a corresponding reel set. The motor unit drives the reel sets to rotate, thereby moving the traction rope sets.

10. A clothes drying rack as described in claim 9, characterized in that: The reel assembly has two reels; the two traction ropes of the traction rope assembly are wound one-to-one around the two reels of the reel assembly.

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