Dual mode backup lift transmission structure with emergency hand crank

Abstract

This invention relates to the field of clothes drying rack transmission structure technology, specifically an emergency hand-cranked dual-mode backup lifting transmission structure, including a transmission box. The transmission box contains a main transmission mechanism; the outer wall of the transmission box contains a secondary transmission mechanism, which includes a mounting box, a control lever, and a driven bevel gear. A rotating ring is rotatably connected to the bottom wall of the mounting box. Multiple interconnected rods arranged in an array are fixedly connected inside the rotating ring. A driving bevel gear is fixedly connected to the top of the rotating ring. A mounting block is fixedly connected to the outer wall of the rotating ring. Symmetrically arranged guide rods are fixedly connected to the mounting block. Positioning rods are slidably connected to each guide rod, and springs are fixedly connected to each positioning rod at the corresponding position of the guide rod. The advantages of this invention are: avoiding the problem of aging connecting wires, ensuring emergency reliability, eliminating the risk of dust contamination, and saving installation space.

Description

Technical Field

[0001] This invention relates to the field of clothes drying rack transmission structure technology, specifically to an emergency hand-cranked dual-mode backup lifting transmission structure. Background Technology

[0002] In the clothes drying rack industry, to cope with emergencies such as power outages and motor failures, a dual-mode backup lifting transmission structure (primarily electric, supplemented by emergency hand crank) has become a key design direction. Connector-type transmission is the mainstream choice for emergency hand crank mode due to its low cost and strong adaptability. In existing technologies, the connecting line (mostly steel wire rope or cable) is the core carrier for transmitting power in emergency hand crank mode. Its transmission logic revolves around a closed loop of "hand crank, connecting line, and lifting components": the storage structure (winding shaft) houses the main unit; one end of the connecting line connects to the drying rod, and the other end is wound around the winding shaft. In electric mode, the motor drives the winding shaft to wind and unwind the connecting line; in the event of a power outage, the hand crank rotates, causing the winding shaft to rotate and pulling the connecting line to achieve emergency lifting and lowering of the drying rod. Some solutions also design dual connecting lines (first sub-line and second sub-line) as backup to avoid functional failure due to a single line breakage.

[0003] The connecting cable backup lifting transmission mechanism requires connecting cables to be laid along the ceiling and walls during installation. With technological advancements, scenarios requiring emergency manual cranking, such as motor failures or power outages, are rarely encountered. This leaves the connecting cable idle for extended periods. The exposed cable not only gradually becomes brittle and ages due to changes in temperature and humidity and air corrosion, affecting its reliability in emergency use, but also easily accumulates dust. Even when the manual cranking function is not used, dust adhering to the cable surface will be shaken off and onto the clothes drying below when clothes are being lifted or when there is airflow disturbance, causing contamination. This structure is both space-consuming and prone to dust pollution and component aging, making it impractical. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides an emergency hand-cranked dual-mode backup lifting transmission structure.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an emergency hand-cranked dual-mode backup lifting transmission structure, including a transmission box, wherein the transmission box is provided with a main transmission mechanism; A secondary transmission mechanism is provided on the outer wall of the transmission box. The secondary transmission mechanism includes a mounting box, a control lever, and a driven bevel gear. A rotating ring is rotatably connected to the bottom wall of the mounting box. Multiple interconnected rods arranged in an array are fixedly connected inside the rotating ring. A driving bevel gear is fixedly connected to the top of the rotating ring. A mounting block is fixedly connected to the outer wall of the rotating ring. A symmetrically arranged guide rod is fixedly connected to the mounting block. A positioning rod is slidably connected to each guide rod. A spring is fixedly connected to each positioning rod at the position corresponding to the guide rod. An interconnected groove is opened on the control lever at the position corresponding to the connecting rod. A positioning groove is opened on the control lever at the position corresponding to the positioning rod. A symmetrically arranged push seat is slidably connected inside the positioning groove. A lifting rod is slidably connected inside the control lever at the bottom position corresponding to the positioning groove. A symmetrically arranged hinge seat is fixedly connected to the top of the lifting rod. A connecting rod is hinged to each hinge seat. A push handle is slidably connected to the control lever near the bottom position.

[0006] Specifically, the main transmission mechanism includes a motor, a retracting rod, and a transmission rod. A worm gear is fixedly connected to the transmission rod, and a worm wheel is fixedly connected to the retracting rod at the position corresponding to the worm gear.

[0007] Specifically, the motor is fixedly installed at the bottom of the transmission box, the retracting rod is rotatably connected to the middle position inside the transmission box, the transmission rod is rotatably connected to the position corresponding to the motor output end inside the transmission box, one end of the transmission rod is fixedly connected to the motor output end, and the worm gear is meshed with the worm.

[0008] Specifically, the mounting box is fixedly connected to the front wall of the transmission box near the side end, the top of the control lever is slidably inserted into the rotating ring, the driven bevel gear is located inside the mounting box, and the driven bevel gear is fixedly connected to the other end of the transmission rod.

[0009] Specifically, the connecting rods are all slidably connected inside the corresponding connecting grooves, one end of each spring is fixedly connected to the mounting block, the driving bevel gear and the driven bevel gear are meshed, the positioning rods are all L-shaped, and the bottom end of the positioning rod is inclined.

[0010] Specifically, the bottom end of each positioning rod is slidably inserted into the corresponding positioning groove, one end of each push seat abuts against the corresponding positioning rod, each push seat is hinged to the corresponding linkage rod, the bottom end of the control lever is fixedly connected to a rotating handle, and the push handle is fixedly connected to the lifting rod.

[0011] The beneficial effects of this invention are: To avoid the problem of aging connecting wires and ensure emergency reliability, this technology abandons the long-term exposed and idle connecting wire transmission structure in existing technologies. Instead, it adopts a detachable control lever as the emergency power transmission carrier, which does not need to be exposed to the air for a long time. This avoids the brittle aging of components caused by changes in environmental temperature and humidity and air corrosion, ensuring the stable operation of the transmission structure in emergency scenarios. In addition, the rotating ring of the secondary transmission mechanism is in an idling state in electric mode and is not rigidly bound to the main transmission mechanism. This will not increase the load on the motor and will also avoid the impact of connecting wire entanglement and jamming on the operation of the main transmission in the traditional backup structure, thus improving the overall transmission stability of the clothes drying rack. Eliminating the risk of dust contamination, the emergency control lever can be folded away and stored separately when not in use, unlike traditional connecting cables that accumulate dust on their surface. This completely solves the problem of dust falling and contaminating clothes when clothes are raised or lowered or when airflow is disturbed, keeping the drying environment clean. It saves installation space by eliminating the connecting lines and supporting storage structures laid along the ceiling and walls. Emergency functions are achieved only through the compact secondary transmission mechanism on the outer wall of the transmission box, which greatly reduces the installation space occupied by the device and adapts to the usage needs of balconies of different apartment types. It is easy to operate and highly adaptable. In an emergency, simply align the control lever with the rotating ring and insert it to complete the connection. The drying rack can be raised or lowered by rotating the handle. To disassemble, simply push the handle upwards to separate the control lever. No complicated tools are required throughout the process, making it suitable for the operating habits of ordinary users. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a front view provided for the present invention; Figure 2 This is a cross-sectional view of the transmission box provided by the present invention; Figure 3 This is a structural diagram of the connection between the rotating ring and the control lever provided by the present invention; Figure 4 A structural diagram showing the separation of the control lever and the rotating ring, with a portion of the rotating ring cut off, provided by the present invention; Figure 5 A top sectional view of the joystick provided by the present invention; Figure 6 A cross-sectional view of the bottom of the joystick provided for this invention.

[0014] In the diagram: 1. Transmission box; 2. Main transmission mechanism; 21. Motor; 22. Retracting rod; 23. Transmission rod; 24. Worm gear; 25. Worm wheel; 3. Secondary transmission mechanism; 31. Mounting box; 32. Control lever; 33. Driven bevel gear; 34. Rotating ring; 35. Connecting rod; 36. Driving bevel gear; 37. Mounting block; 38. Guide rod; 39. Positioning rod; 40. Spring; 41. Connecting groove; 42. Positioning groove; 43. Push seat; 44. Lifting rod; 45. Hinge seat; 46. Linkage rod; 47. Push handle. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0016] Please see Figures 1 to 6 The present invention provides the following technical solutions: The emergency hand-cranked dual-mode backup lifting transmission structure includes a transmission box 1, and the transmission box 1 is equipped with a main transmission mechanism 2. A secondary transmission mechanism 3 is provided on the outer wall of the transmission box 1. The secondary transmission mechanism 3 includes a mounting box 31, a control lever 32, and a driven bevel gear 33. A rotating ring 34 is rotatably connected to the bottom wall of the mounting box 31. Multiple interconnected rods 35 arranged in an array are fixedly connected inside the rotating ring 34. A driving bevel gear 36 is fixedly connected to the top of the rotating ring 34. A mounting block 37 is fixedly connected to the outer wall of the rotating ring 34. A guide rod 38 is symmetrically arranged and fixedly connected to the mounting block 37. A positioning rod 39 is slidably connected to each guide rod 38, and the positioning rod 39 corresponds to the guide rod 38. Springs 40 are fixedly connected at each position. A connecting groove 41 is opened on the control lever 32 at the position corresponding to the connecting rod 35. A positioning groove 42 is opened on the control lever 32 at the position corresponding to the positioning rod 39. A push seat 43 is slidably connected inside the positioning groove 42. A lifting rod 44 is slidably connected inside the control lever 32 at the bottom position corresponding to the positioning groove 42. A hinge seat 45 is fixedly connected to the top of the lifting rod 44. A connecting rod 46 is hinged on each hinge seat 45. A push handle 47 is slidably connected to the control lever 32 near the bottom position.

[0017] The main transmission mechanism 2 includes a motor 21, a winding rod 22, and a transmission rod 23. A worm gear 24 is fixedly connected to the transmission rod 23, and a worm wheel 25 is fixedly connected to the winding rod 22 at the position corresponding to the worm gear 24. The motor 21 is fixedly installed at the bottom of the transmission box 1. The winding rod 22 is rotatably connected to the middle position inside the transmission box 1, and the transmission rod 23 is rotatably connected to the position inside the transmission box 1 corresponding to the output end of the motor 21. One end of the transmission rod 23 is fixedly connected to the output end of the motor 21, allowing the motor 21 to easily drive the transmission rod 23 to rotate. The worm wheel 25 meshes with the worm gear 24, allowing the worm gear 24 to easily drive the worm wheel 25 to rotate at low speed. When the worm gear 24 stops rotating, it can lock the worm wheel 25. The mounting box 31 is fixedly connected to the front wall of the transmission box 1 near the side end. The top end of the operating lever 32 is slidably inserted into the rotating ring 34. The driven bevel gear 33 is located inside the mounting box 31 and is fixedly connected to the other end of the transmission rod 23. The transmission rod 23 can easily pass through the driven bevel gear 24. The meshing of the moving bevel gear 33 and the driving bevel gear 36 transmits power to the rotating ring 34. The connecting rods 35 are all slidably connected inside the corresponding connecting grooves 41. One end of the springs 40 is fixedly connected to the mounting block 37. The driving bevel gear 36 and the driven bevel gear mesh 33. The positioning rods 39 are all L-shaped. The bottom end of the positioning rod 39 is inclined. The bottom end of the positioning rod 39 is slidably inserted into the corresponding positioning groove 42. The connection between the two can fix the position of the control lever 32. One end of the push seat 43 abuts against the corresponding positioning rod 39. When the push seat 43 moves, it is easy to squeeze the positioning rod 39, so that the positioning rod 39 moves out of the positioning groove 42. The push seat 43 is hinged to the corresponding linkage rod 46. When the linkage rod 46 runs, it is easy to drive the push seat 43 to move. The bottom end of the control lever 32 is fixedly connected to a rotating handle. The rotating handle is easy to directly rotate the control lever 32. The push handle 47 is fixedly connected to the lifting rod 44. The push handle 47 is easy to drive the lifting rod 44 to move upward.

[0018] When in use, when the control lever 32 is not connected to the rotating ring 34, the motor 21 will drive the transmission rod 23 to rotate when it runs. The transmission rod 23 will drive the worm 24 and the driven bevel gear 33 to rotate. The worm 24 will drive the worm wheel 25 and the gathering rod 22 to rotate. The rotation of the gathering rod 22 will perform a wire release action to release the wire harness connected to the clothes rack, thereby lowering the height of the clothes rack for the user to hang clothes. The rotation of the driven bevel gear 33 will drive the driving bevel gear 36 and the rotating ring 34 to rotate. At this time, the rotating ring 34 is not connected to the control lever 32, so the rotation of the rotating ring 34 is idle and does not affect the normal operation of the main transmission mechanism 2. When the main drive mechanism 2 fails to operate normally due to a power outage or a malfunction of the motor 21, the user can insert the top of the retracted control lever 32 into the rotating ring 34. The connecting groove 41 on the control lever 32 must align with the connecting rod 35 inside the rotating ring 34. After alignment, simply move the control lever 32 upwards until it is inserted into the rotating ring 34. During the upward movement of the control lever 32, its corners will press against the inclined position of the bottom rod of the positioning rod 39. As the control lever 32 moves upwards, the two positioning rods 39 will move away from the control lever 32. Both positioning rods 39 will move under the guidance of the guide rod 38, and the movement of the positioning rods 39 will simultaneously activate the corresponding springs. When the lever 32 is fully inserted into the rotating ring 34, the connecting rods 35 are connected to the corresponding connecting grooves 41, and the positioning grooves 42 on the lever 32 move to the position of the corresponding positioning rod 39. At this time, the outer wall of the lever 32 no longer presses against the positioning rod 39, and the springs 40 will return to their original positions. The returned springs 40 will drive the positioning rod 39 to return to its original position and move. The positioning rod 39 will then be inserted into the corresponding positioning grooves 42 on the lever 32, thus fixing the position of the lever 32. At this time, the user can directly rotate the lever 32 by turning the handle. The lever 32 will drive the rotating ring 34 to rotate actively through the connection between the connecting grooves 41 and the connecting rods 35. When the rotating ring 34 rotates, it drives the active bevel gear 36 to rotate, which in turn drives the driven bevel gear 33 to rotate. The driven bevel gear 33 then drives the worm wheel 25 and the winding rod 22 to rotate via the transmission rod 23 and the worm 24, causing the winding rod 22 to perform the action of letting out or taking in the line, thus completing the movement of the clothes rack on the clothes drying rack. The rotation of the transmission rod 23 also drives the output end of the motor 21 to rotate passively. The output end of the motor 21 does not have a self-locking function, because the connection between the worm wheel 25 and the worm 24 is sufficient to achieve the self-locking of the winding rod 22. When disassembling, it is only necessary to actively move the push handle 47 upward, so that the push handle 47 drives the lifting rod 44 upward. The upward movement of the lifting rod 44 will drive the two The upward movement of the hinge seat 45 will cause the push seat 43 to move in the positioning groove 42 via the linkage rod 46. The movement of the push seat 43 will press the corresponding positioning rod 39. The positioning rod 39 will be dislodged from the positioning groove 42 under pressure. At this time, the operating lever 32 can be moved down and separated from the rotating ring 34. The operation is extremely convenient. The operating lever 32 can be stored separately, which will not take up extra space on the balcony. During storage, it will also prevent excess dust from adhering to its surface and prevent dust from being shaken onto clothes during use. Separate storage will also help extend the service life of the secondary transmission mechanism 3. It is extremely practical and convenient to operate.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An emergency hand-cranked dual-mode backup lifting transmission structure, characterized in that: Includes a transmission box (1), and the transmission box (1) is provided with a main transmission mechanism (2); The transmission box (1) is provided with a secondary transmission mechanism (3) on its outer wall. The secondary transmission mechanism (3) includes a mounting box (31), a control lever (32), and a driven bevel gear (33). A rotating ring (34) is rotatably connected to the bottom wall of the mounting box (31). Multiple interconnected rods (35) are fixedly connected in an array inside the rotating ring (34). A driving bevel gear (36) is fixedly connected to the top of the rotating ring (34). A mounting block (37) is fixedly connected to the outer wall of the rotating ring (34). A guide rod (38) is fixedly connected to the mounting block (37). A positioning rod (39) is slidably connected to each guide rod (38). The positioning rod (39) corresponds to the guide rod. (38) A spring (40) is fixedly connected at each position. A connecting groove (41) is opened on the control lever (32) at the position corresponding to the connecting rod (35). A positioning groove (42) is opened on the control lever (32) at the position corresponding to the positioning rod (39). A push seat (43) is symmetrically arranged inside the positioning groove (42). A lifting rod (44) is slidably connected inside the control lever (32) at the bottom position corresponding to the positioning groove (42). A hinge seat (45) is fixedly connected at the top of the lifting rod (44). A connecting rod (46) is hinged on each hinge seat (45). A push handle (47) is slidably connected near the bottom position of the control lever (32).

2. The emergency hand-cranked dual-mode backup lifting transmission structure according to claim 1, characterized in that: The main transmission mechanism (2) includes a motor (21), a winding rod (22) and a transmission rod (23). A worm gear (24) is fixedly connected to the transmission rod (23), and a worm wheel (25) is fixedly connected to the winding rod (22) at the position corresponding to the worm gear (24).

3. The emergency hand-cranked dual-mode backup lifting transmission structure according to claim 2, characterized in that: The motor (21) is fixedly installed at the bottom of the transmission box (1). The gathering rod (22) is rotatably connected to the middle position inside the transmission box (1). The transmission rod (23) is rotatably connected to the position corresponding to the output end of the motor (21) inside the transmission box (1). One end of the transmission rod (23) is fixedly connected to the output end of the motor (21). The worm gear (25) is meshed with the worm (24).

4. The emergency hand-cranked dual-mode backup lifting transmission structure according to claim 1, characterized in that: The mounting box (31) is fixedly connected to the front wall of the transmission box (1) near the side end. The top end of the control lever (32) is slidably inserted into the rotating ring (34). The driven bevel gear (33) is located inside the mounting box (31). The driven bevel gear (33) is fixedly connected to the other end of the transmission rod (23).

5. The emergency hand-cranked dual-mode backup lifting transmission structure according to claim 1, characterized in that: The connecting rods (35) are all slidably connected inside the corresponding connecting grooves (41), one end of each spring (40) is fixedly connected to the mounting block (37), the active bevel gear (36) meshes with the driven bevel gear (33), the positioning rods (39) are all L-shaped, and the bottom end of the positioning rod (39) is inclined.

6. The emergency hand-cranked dual-mode backup lifting transmission structure according to claim 1, characterized in that: The bottom end of each positioning rod (39) is slidably inserted into the corresponding positioning groove (42). One end of each push seat (43) abuts against the corresponding positioning rod (39). Each push seat (43) is hinged to the corresponding linkage rod (46). The bottom end of each control lever (32) is fixedly connected to a rotating handle. The push handle (47) is fixedly connected to the lifting rod (44).

Images