Worm gear and worm low-loss clothes airing machine lifting transmission device

Abstract

The invention relates to the technical field of clothes airing machine transmission structures, in particular to a worm and gear low-loss clothes airing machine lifting transmission device which comprises a base, a mounting frame is fixedly connected to the base, and a lifting transmission mechanism is arranged on the mounting frame; a self-lubricating mechanism is arranged at the top end of the mounting frame, the self-lubricating mechanism comprises a top cover, symmetrically arranged rubber sleeves are fixedly connected to the bottom end of the top cover, and a plurality of oil leakage holes are formed in the bottom ends of the rubber sleeves. According to the mechanism, dynamic trigger type oil supply is matched with rotation of the worm gear to extrude the rubber sleeve, traditional one-time pre-coating lubricating grease is replaced, loss and drying of the lubricating grease are avoided, long-acting lubrication of the meshing face of the worm gear and the worm is achieved, and the mechanism is simple in component, free of extra power, compact and practical in structure and capable of achieving self-adaptive adjustment; the lubricating requirement is met, and oil waste and part pollution are avoided.

Description

Technical Field

[0001] This invention relates to the field of clothes drying machine transmission structure technology, specifically to a low-loss lifting transmission device for clothes drying machines using a worm gear and worm wheel. Background Technology

[0002] In the field of clothes drying racks, the lifting transmission device is the core component for realizing the lifting function of clothes. Its transmission efficiency and stability directly affect the user experience of the equipment. The worm gear transmission structure is widely used in the lifting system of clothes drying racks due to its smooth meshing, precise transmission ratio and self-locking characteristics. It is suitable for light-load and low-speed working scenarios. The existing worm gear lifting transmission device of clothes drying racks is usually composed of a worm wheel, a worm, a transmission shaft and a gearbox. The worm is connected to the output shaft of the drive motor. Power is transmitted to the lifting mechanism through the meshing transmission of the worm wheel and worm, so as to realize the smooth lifting of the clothes rack. In order to reduce friction loss during the transmission process, these devices often apply grease to the meshing area of ​​the worm wheel and worm. Some structures will install bearings or bushings at the joint between the transmission shaft and the gearbox to reduce friction caused by relative movement.

[0003] However, existing transmission devices mostly use a one-time pre-coating lubrication method, lacking a continuous oil replenishment mechanism. After long-term use, the grease is prone to loss and drying, leading to increased friction on the meshing surface of the worm gear. At the same time, the support structure design of the transmission shaft is relatively simple, making it difficult to fully compensate for minor deviations during installation and operation, resulting in additional losses during transmission and affecting the long-term stable operation of the transmission device. There is an urgent need to further optimize the transmission structure and lubrication system to meet the low-loss characteristics of worm gear transmission. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides a low-loss lifting transmission device for clothes drying racks using a worm gear and worm wheel.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a low-loss clothes drying machine lifting transmission device of worm gear and worm, including a base, an installation frame fixedly connected to the base, and a lifting transmission mechanism provided on the installation frame; The mounting frame is equipped with a self-lubricating mechanism at its top. The self-lubricating mechanism includes a top cover, with symmetrically arranged rubber sleeves fixedly connected to the bottom of the top cover. Multiple oil leakage holes are opened at the bottom of the rubber sleeves. An oil tank is fixedly connected to the top of the top cover. A cap is threadedly connected to the top of the oil tank. A spring is fixedly connected to the bottom of the cap. A pressure plate is fixedly connected to the bottom of the spring. A sponge is movably placed inside the oil tank. Symmetrically arranged connecting grooves are opened on the sponge. Fiber ropes are slidably connected inside each connecting groove. A positioning block is fixedly connected to the top of each fiber rope. Symmetrically arranged passage grooves are opened on both the bottom wall of the oil tank and the top cover. A sealing ring is fixedly connected inside each passage groove at the top.

[0006] Specifically, the lifting transmission mechanism includes a gathering rod, a transmission rod, and a motor. Two gathering rollers are fixedly connected to the gathering rod. A worm gear is fixedly connected to the gathering rod at a position corresponding to the inside of the mounting frame. A worm is fixedly connected to the transmission rod at a position corresponding to the worm gear.

[0007] Specifically, the retracting rod is rotatably connected to the middle position of the mounting frame, the transmission rod is rotatably connected to the inside of the mounting frame near the bottom, the motor is fixedly installed on the back wall of the mounting frame, the output end of the motor is fixedly connected to one end of the transmission rod, and the worm gear is meshed with the worm.

[0008] Specifically, the top cover is fixedly connected to the top of the mounting frame by bolts, and the top cover is square in shape.

[0009] Specifically, the rubber sleeve is made of nitrile rubber, and a feed port is fixedly connected to the outer wall of the oil tank. One end of the feed port penetrates through the outer wall of the oil tank and communicates with the oil tank. The spring is in a compressed state, and the bottom end of the pressure plate abuts against the top end of the sponge, and the sponge is in a compressed state.

[0010] Specifically, the bottom end of each positioning block abuts against the top end of the sponge, and the bottom end of the fiber rope passes through the top passage groove and the bottom passage groove, which are located inside the rubber sleeve.

[0011] The beneficial effects of this invention are: The self-lubricating mechanism uses a sponge to continuously absorb lubricating oil from the oil tank, which is then transmitted to the oil supply end via a fiber rope. Combined with the dynamic triggering oil supply design where the worm gear rotates and squeezes the rubber sleeve, it successfully replaces the traditional one-time pre-applied grease method. This effectively avoids the problems of grease loss and drying, achieving long-term continuous lubrication of the worm gear meshing surface. At the same time, the self-lubricating mechanism has a simple component composition, requires no additional power source, has a compact structure, and is highly practical. Furthermore, the dynamic oil supply characteristic of the self-lubricating mechanism can avoid oil waste. Lubricating oil is only released when the worm gear rotates and squeezes the rubber sleeve. When stationary, the oil leakage hole has a very small diameter, which prevents the oil from flowing out actively. This achieves adaptive adjustment of oil supply during operation and supply cutoff when stationary, ensuring lubrication needs while avoiding oil waste and component contamination. To improve transmission stability, the spring and pressure plate continuously compress the sponge, ensuring that the sponge adheres to the bottom of the oil tank for a long time and fully absorbs oil. The positioning block fixes the position of the fiber rope, avoiding uneven oil supply caused by the displacement of the fiber rope during the oil supply process. This indirectly compensates for minor deviations in installation and operation and reduces transmission fluctuations. Extending the service life of components and devices, stable lubrication can reduce wear on the meshing surface of worm gear and reduce hard friction damage. The nitrile rubber bushing has both wear resistance and oil resistance. The oil film formed by the lubricating oil can reduce the friction between the rubber bushing and the worm gear, further extending the service life of the rubber bushing and the entire transmission device. The rubber sleeve itself is elastic, and when it comes into contact with the worm gear, it can buffer the slight impact during the meshing process. Combined with the lubrication of the oil film, it can effectively reduce friction noise during the transmission process and improve the quietness of the clothes drying rack. Attached Figure Description

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

[0013] Figure 1 The front view provided for this invention; Figure 2 A cross-sectional view of the mounting frame provided by the present invention; Figure 3 The structural diagram provided by the present invention shows the top cover separated from the fuel tank and the fuel tank section removed. Figure 4 This is a structural diagram of the bottom end of the fuel tank provided by the present invention; Figure 5 This invention provides a structural diagram of the separation of fiber rope and sponge. Figure 6 This is a cross-sectional view of the top cover and fuel tank provided by the present invention.

[0014] In the diagram: 1. Base; 2. Mounting frame; 3. Lifting transmission mechanism; 31. Gathering rod; 32. Transmission rod; 33. Motor; 34. Gathering roller; 35. Worm gear; 36. Worm; 4. Self-lubricating mechanism; 41. Top cover; 42. Rubber sleeve; 43. Oil leakage hole; 44. Oil tank; 45. Cover; 46. Spring; 47. Pressure plate; 48. Sponge; 49. Connecting groove; 50. Fiber rope; 51. Positioning block; 52. Passage groove; 53. Sealing ring. 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: Example 1: A low-loss clothes drying rack lifting transmission device with worm gear and worm wheel includes a base 1, a mounting frame 2 fixedly connected to the base 1, a lifting transmission mechanism 3 on the mounting frame 2, the lifting transmission mechanism 3 including a gathering rod 31, a transmission rod 32 and a motor 33, two gathering rollers 34 fixedly connected to the gathering rod 31, a worm wheel 35 fixedly connected to the gathering rod 31 at a position corresponding to the inside of the mounting frame 2, a worm 36 fixedly connected to the transmission rod 32 at a position corresponding to the worm wheel 35, the gathering rod 31 is rotatably connected to the middle position on the mounting frame 2, the transmission rod 32 is rotatably connected to the inside of the mounting frame 2 near the bottom, the motor 33 is fixedly installed on the back wall of the mounting frame 2, the output end of the motor 33 is fixedly connected to one end of the transmission rod 32, and the worm wheel 35 and the worm 36 are meshed together. In use, the connecting steel cable on the retractable bracket at the bottom of the clothes drying rack is wound onto the winding roller 34. The base 1 and the lifting transmission mechanism 3 are installed inside the clothes drying rack. When the motor 33 is started, the motor 33 will drive the transmission rod 32 and the worm gear 36 to rotate. The rotation of the worm gear 36 will drive the worm wheel 35 and the winding rod 31 to rotate. The rotation of the winding rod 31 will drive the two winding rollers 34 to rotate. The rotation of the winding rollers 34 will continuously release the wound connecting steel cable, thereby causing the connecting steel cable to drive the telescopic bracket on the clothes drying rack to move down. When the output end of the motor 33 reverses, it will drive the telescopic bracket on the clothes drying rack to retract and move up through the lifting transmission mechanism 3.

[0017] Example 2: The technical solution of this example, which differs from that of Example 1, includes: a self-lubricating mechanism 4 at the top of the mounting frame 2, the self-lubricating mechanism 4 including a top cover 41, a symmetrically arranged rubber sleeve 42 fixedly connected to the bottom of the top cover 41, a plurality of oil leakage holes 43 at the bottom of the rubber sleeve 42, an oil tank 44 fixedly connected to the top of the top cover 41, a cover 45 threadedly connected to the top of the oil tank 44, a spring 46 fixedly connected to the bottom of the cover 45, a pressure plate 47 fixedly connected to the bottom of the spring 46, a sponge 48 movably placed inside the oil tank 44, a symmetrically arranged connecting groove 49 on the sponge 48, a fiber rope 50 slidably connected inside the connecting groove 49, a positioning block 51 fixedly connected to the top of each fiber rope 50, and symmetrically arranged passage grooves 52 on the bottom wall of the oil tank 44 and the top cover 41, a sealing ring 53 fixedly connected inside each passage groove 52. The top cover 41 is fixedly connected to the top of the mounting frame 2 by bolts. The top cover 41 is square in shape. The rubber sleeve 42 is made of nitrile rubber. The feed port is fixedly connected to the outer wall of the oil tank 44. One end of the feed port passes through the outer wall of the oil tank 44 and is connected to the oil tank 44. The spring 46 is in a compressed state. The bottom end of the pressure plate 47 abuts against the top end of the sponge 48. The sponge 48 is in a compressed state. The bottom ends of the positioning blocks 51 all abut against the top end of the sponge 48. The bottom end of the fiber rope 50 passes through the top passage groove 52 and the bottom passage groove 52 is located inside the rubber sleeve 42. In use, the pressure plate 47 at the bottom of the cover 45 presses tightly against the top of the sponge 48. The sponge 48 undergoes compression deformation under pressure. Simultaneously, the force exerted by the pressure plate 47 on the sponge 48 acts in the opposite direction on the spring 46, causing the spring 46 to contract. This, in turn, creates continuous compression of the sponge 48 through the spring 46 and the pressure plate 47, ensuring that the sponge 48 remains in close contact with the bottom of the oil tank 44 for an extended period. The sponge 48 fully absorbs the lubricating oil in the oil tank 44, and the absorbed lubricating oil gradually soaks into the fiber rope 50 in the connecting groove 49, causing the fiber rope 50 to slowly become saturated with lubricating oil. The bottom end is located inside the rubber sleeve 42. Because the oil leakage hole 43 at the bottom of the rubber sleeve 42 has an extremely small diameter, the absorbed lubricating oil will not be released through the oil leakage hole 43 when the rubber sleeve 42 and the fiber rope 50 are not deformed. The sealing ring 53 in the passage groove 52 on the oil tank 44 can prevent oil leakage at the connection between the fiber rope 50 and the oil tank 44. The passage groove 52 on the top cover 41 is sealed by the rubber sleeve 42. In addition, the two positioning blocks 51 at the top of the sponge 48 can ensure the stability of the fiber rope 50. When the worm 36 drives the worm wheel 35 to rotate, the worm... The teeth on the worm gear 35 press against the rubber sleeve 42, causing the rubber sleeve 42 to deform under pressure. The deformed rubber sleeve 42 further presses against the bottom of the fiber rope 50. At this time, the lubricating oil absorbed by the fiber rope 50 is discharged through the oil drain hole 43. A small amount of discharged lubricating oil drips onto the worm gear 35. Simultaneously, an oil film is coated onto the outer wall of the rubber sleeve 42 due to the rotation of the worm gear 35. This oil film effectively reduces the friction between the rubber sleeve 42 and the worm gear 35. Combined with the wear-resistant properties of the rubber sleeve 42, this further extends its service life. Additionally, the worm gear 35... During rotation, lubricating oil is conducted to the worm 36, thereby ensuring that the friction between the worm wheel 35 and the worm 36 is kept at a low level for a long time, maintaining a low-loss operating state and extending the service life of both. When the worm wheel 35 and the worm 36 are in a stationary state, the extremely small oil leakage hole 43 can prevent lubricating oil from actively flowing to the worm wheel 35, ensuring that the self-lubricating mechanism 4 can be used for a long time and is compatible with the usage frequency of the clothes drying machine. When the lubricating oil in the oil tank 44 is exhausted, lubricating oil can be replenished into the oil tank 44 through the feed port or by removing the cover 45.

[0018] 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. A low-loss clothes drying machine lifting transmission device with worm gear and worm, including a base (1), a mounting frame (2) fixedly connected to the base (1), and a lifting transmission mechanism (3) provided on the mounting frame (2). Its features are: The mounting frame (2) is provided with a self-lubricating mechanism (4) at its top. The self-lubricating mechanism (4) includes a top cover (41). The bottom end of the top cover (41) is fixedly connected to symmetrically arranged rubber sleeves (42). The bottom end of the rubber sleeves (42) is provided with multiple oil leakage holes (43). The top end of the top cover (41) is fixedly connected to an oil tank (44). The top end of the oil tank (44) is threadedly connected to a cover (45). The bottom end of the cover (45) is fixedly connected to a spring (46). The bottom end of the spring (46) is... A pressure plate (47) is fixedly connected. A sponge (48) is movably placed inside the oil tank (44). A symmetrically arranged connecting groove (49) is opened on the sponge (48). A fiber rope (50) is slidably connected inside the connecting groove (49). A positioning block (51) is fixedly connected to the top of the fiber rope (50). A symmetrically arranged passage groove (52) is opened on the bottom wall and the top cover (41) of the oil tank (44). A sealing ring (53) is fixedly connected inside the passage groove (52) at the top.

2. The low-loss clothes drying rack lifting transmission device with worm gear as described in claim 1, characterized in that: The lifting transmission mechanism (3) includes a gathering rod (31), a transmission rod (32) and a motor (33). Two gathering rollers (34) are fixedly connected to the gathering rod (31). A worm gear (35) is fixedly connected to the gathering rod (31) at the position corresponding to the inside of the mounting frame (2). A worm (36) is fixedly connected to the transmission rod (32) at the position corresponding to the worm gear (35).

3. The low-loss clothes drying rack lifting transmission device with worm gear as described in claim 2, characterized in that: The retractor (31) is rotatably connected to the middle position of the mounting frame (2), the transmission rod (32) is rotatably connected to the inside of the mounting frame (2) near the bottom, the motor (33) is fixedly installed on the back wall of the mounting frame (2), the output end of the motor (33) is fixedly connected to one end of the transmission rod (32), and the worm gear (35) is meshed with the worm (36).

4. The low-loss clothes drying rack lifting transmission device with worm gear as described in claim 1, characterized in that: The top cover (41) is fixedly connected to the top of the mounting frame (2) by bolts, and the top cover (41) is square in shape.

5. The low-loss clothes drying rack lifting transmission device with worm gear as described in claim 1, characterized in that: The rubber sleeve (42) is made of nitrile rubber. The oil tank (44) has a feed port fixedly connected to its outer wall. One end of the feed port passes through the outer wall of the oil tank (44) and communicates with the oil tank (44). The spring (46) is in a compressed state. The bottom end of the pressure plate (47) abuts against the top end of the sponge (48). The sponge (48) is in a compressed state.

6. The low-loss clothes drying rack lifting transmission device with worm gear as described in claim 1, characterized in that: The bottom ends of the positioning blocks (51) are in contact with the top end of the sponge (48), and the bottom end of the fiber rope (50) passes through the top passage groove (52) and the bottom passage groove (52) is located inside the rubber sleeve (42).

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