Worm Gear Screw Jack

Abstract

This invention discloses a worm gear screw jack in the field of screw jack technology, including a protective sleeve with connecting slides evenly distributed inside. An auxiliary ring is rotatably connected to the outer ring of the bottom end of the screw, and a slide rod is fixedly connected to the outer ring of the auxiliary ring. Multiple mounting slots are evenly distributed around the circumference of the auxiliary ring, and a double-headed cam is rotatably connected to each mounting slot via a torsion spring shaft. Wedge blocks are slidably connected to the upper and lower sides of the mounting slot. Multiple safety blocks are evenly slidably connected to the outer ring of the auxiliary ring. A limiting rod is fixedly connected to the outer side of the double-headed cam. A semi-circular arc groove is formed in the inner sidewall of the mounting slot. A release gear is fixedly connected to the outer wall of the torsion spring shaft. A damping gear ring is installed at the bottom of the screw. Positioning pins are elastically connected to both ends of the double-headed cam. Accommodation holes are formed on both sides of the mounting slot. An electromagnet is used to attract the wedge blocks closer together, and an attraction electromagnet is used to attract and pull out the positioning pins. This invention avoids situations such as free fall, making it safer and improving reliability.

Description

Technical Field

[0001] This invention relates to the field of screw jack technology, specifically to worm gear screw jacks. Background Technology

[0002] As a highly efficient lifting device, lifting platforms are widely used in coal mines, bridges, vehicles, and aviation. Currently, the main structural types of small lifting platforms widely used in the market include scissor lifts, telescopic cylinder lifts, mast lifts, and screw jacks. All of these lifting mechanisms have telescopic characteristics, which can effectively reduce the size of the equipment and enable lifting operations in confined spaces.

[0003] Screw jacks use a sliding helical pair consisting of a screw and a nut to restrict the nut's rotational freedom. The screw's rotation drives the nut to achieve axial lifting and lowering. In current industrial production processes, heavy objects are frequently lifted. Although screw jacks have a simple structure and fast lifting speed, they often use a single screw. Current technologies mostly control the screw height through a valve body or a self-locking mechanism between the jack and the screw. However, due to the frequent lifting of heavy objects or reaching precise heights in production environments, the repeated and frequent starts and stops accelerate the wear of the screw or the valve body and jack, leading to malfunctions or failures of the device or parts. This can result in accidents such as the screw falling down unexpectedly. Currently, most screw jacks lack anti-falling components, significantly reducing equipment reliability and safety, which is detrimental to normal production.

[0004] Based on this, the present invention designs a worm gear screw jack to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a worm gear screw jack to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A worm gear screw jack includes a turbine, a screw, and a casing. The screw is located inside the casing, which is connected to the bottom of the turbine. Connecting slideways are evenly spaced inside the casing. An auxiliary ring is rotatably connected to the outer ring of the bottom end of the screw. A sliding rod is fixedly connected to the outer ring of the auxiliary ring, and the sliding rod is located within the connecting slideways, allowing for sliding contact. Multiple mounting slots are evenly spaced around the auxiliary ring. A double-headed cam is rotatably connected to each mounting slot via a torsion spring shaft. Wedge blocks are slidably connected to the upper and lower sides of each mounting slot. Multiple safety blocks are evenly slidably connected to the outer ring of the auxiliary ring, each safety block corresponding to a mounting slot and located outside the slot. The double-headed cams are located on the upper and lower sides of the mounting slot. In the middle of the wedge-shaped block, a limiting rod is fixedly connected to the outer side of the double-headed cam. A semi-circular arc groove is opened on the inner side wall of the mounting groove. The limiting rod is located in the semi-circular arc groove and the two slide in cooperation. A release gear is fixedly connected to the outer wall of the torsion spring shaft. A damping gear ring is installed at the bottom of the lead screw. The release gear is located above the damping gear ring and meshes with the damping gear ring. Positioning pins are elastically connected inside both ends of the double-headed cam. Accommodation holes are opened on both sides of the mounting groove. An auxiliary ring is located around the periphery of the mounting groove and is respectively equipped with a contacting electromagnet and an adsorption electromagnet. The contacting electromagnet is used to attract the wedge-shaped blocks on the upper and lower sides of the mounting groove to move closer to each other. The adsorption electromagnet is used to pull out the positioning pin.

[0008] Preferably, guide posts are fixedly connected to both the upper and lower sides of the mounting groove, and guide holes are opened inside the wedge blocks. The guide posts are located in the guide holes and the two slide in cooperation. A safety hole is opened on one side of the mounting groove, and a connecting post is fixedly connected to the inner side of the safety block. The connecting post is located in the safety hole and the two slide in cooperation.

[0009] Preferably, a spherical slide is provided in the middle of the outer edge of the double-headed cam, and a ball head shaft is fixedly connected to the inner side of the wedge-shaped blocks on both the upper and lower sides of the mounting groove. The ball head shaft is located in the spherical slide and the two slide in cooperation.

[0010] Preferably, the damping gear ring includes a base ring fixedly connected to the bottom of the lead screw, a damping ring slidably connected to the top of the base ring, a top gear ring rotatably connected to the base ring, the top gear ring being located above the damping ring, and mating round teeth fixedly connected to the bottom of the top gear ring and the top of the damping ring, with the mating round teeth of the two meshing together. A meshing spring is installed between the base ring and the damping ring.

[0011] Preferably, a lubricating ring is installed on the outer ring of the protective sleeve, and a compression ring is slidably connected inside the lubricating ring. A folded sealing sheet is connected between the top of the slide rod and the connecting slide. An air inlet communicating with the lower part of the compression ring of the lubricating ring is opened at the top of the connecting slide. An oil passage communicating with the inside of the protective sleeve is opened on the side wall of the lubricating ring above the compression ring. A wiping ring is connected inside the protective sleeve. The wiping ring is in contact with the outlet of the oil passage and is located on the outer ring of the lead screw.

[0012] Preferably, the lubricating ring has a one-way conical hole at its bottom, a sealing ball is installed in the one-way conical hole, and an adjustment hole communicating with the outside is also provided in the middle of the connecting slide. The adjustment hole is located below the air inlet. A C-shaped ring is connected to the inner ring of the protective sleeve, and the wiping ring is installed in the C-shaped ring. The wiping ring is a sponge ring.

[0013] Preferably, a cleaning ring is rotatably connected to the top of the turbine housing, the cleaning ring is sleeved outside the lead screw, a cleaning rod is slidably connected to the top of the turbine housing, the cleaning rod is located inside the cleaning ring, a gradually convex plate is fixedly connected to the inner ring of the cleaning ring, and a friction wheel is rotatably connected to the top of the turbine housing, the friction wheel is located between the cleaning ring and the lead screw and is in contact with the outer walls of both, the rotation of the lead screw drives the friction wheel to rotate, thereby driving the cleaning ring to rotate.

[0014] Preferably, a mounting bracket is fixedly connected to the top of the turbine housing, a brush is fixedly connected to the end of the cleaning rod and a window is provided in the middle, the mounting bracket passes through the window and the two are slidably engaged, a cleaning spring is fixedly connected between the mounting bracket and the window, and the friction wheel is rotatably connected to the top of the turbine housing via a one-way shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In use, this invention uses a turbine to drive a lead screw to rise or fall, thereby lifting or lowering the connected object. Initially, or when the turbine is stopped and the height remains constant, multiple safety blocks at the lower end of the lead screw are tightly pressed against the inner wall of the protective sleeve. The pressure and friction between the safety blocks and the protective sleeve reinforce the lead screw's positioning while it remains relatively stationary relative to the turbine. This prevents the lead screw from sliding freely if the turbine fails to keep it stationary, thus avoiding situations where objects already at a certain height fall freely. This increases safety during use, prevents risks, and improves reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall front-side top-down structure of the present invention;

[0019] Figure 2 This is a side-view diagram of the internal structure of the present invention;

[0020] Figure 3 This is an enlarged structural diagram of part A of the present invention;

[0021] Figure 4 This is a half-section schematic diagram of the internal structure of the present invention from a side view.

[0022] Figure 5 This is an enlarged structural diagram of part B of the present invention;

[0023] Figure 6 This is a schematic diagram of the enlarged half-section structure of the auxiliary ring of the present invention;

[0024] Figure 7 This is an enlarged structural diagram of part C of the present invention;

[0025] Figure 8 This is a schematic diagram of the internal half-section structure from the overall perspective of the present invention;

[0026] Figure 9 This is an enlarged structural diagram of part D of the present invention;

[0027] Figure 10 This is a half-section diagram of the overall structure of the present invention from an oblique side view;

[0028] Figure 11 This is a top-view half-section diagram of the overall structure of the present invention;

[0029] Figure 12 This is a schematic diagram of the internal structure of the present invention from an upward angle.

[0030] Figure 13 This is an enlarged structural diagram of part E of the present invention;

[0031] Figure 14 This is a schematic diagram of the turbine casing top structure from a top-down perspective.

[0032] Figure 15 This is a schematic diagram of the overall side view half-section structure of the present invention;

[0033] Figure 16This is an enlarged structural diagram of part F of the present invention.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Turbine; 2. Lead screw; 3. Casing; 4. Connecting slide; 5. Auxiliary ring; 6. Slide rod; 7. Mounting slot; 8. Torsion spring shaft; 9. Double-ended cam; 10. Wedge block; 11. Safety block; 12. Limiting rod; 13. Semi-circular groove; 14. Release gear; 15. Damping gear ring; 16. Positioning post; 17. Receiving hole; 18. Fitting electromagnet; 19. Attraction electromagnet; 20. Guide post; 21. Guide hole; 22. Safety hole; 23. Connecting post; 24. Spherical slide; 25. 26. Ball head shaft; 27. Base ring; 28. Damping ring; 29. ​​Top gear ring; 30. Mating round tooth; 31. Engaging spring; 32. Lubricating ring; 33. Compression ring; 34. Folded sealing plate; 35. Air inlet; 36. Oil outlet; 37. Wiping ring; 38. One-way conical hole; 39. Sealing ball; 40. Adjustment hole; 41. C-ring; 42. Cleaning ring; 43. Cleaning rod; 44. Gradual convex plate; 45. Friction wheel; 46. Mounting bracket; 47. Brush; 48. Through window; 49. Cleaning spring. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figure 1-16 The present invention provides a technical solution:

[0038] The worm gear screw jack includes a turbine 1, a screw 2, and a casing 3. The screw 2 is located inside the casing 3, which is connected to the bottom of the turbine 1. Connecting slides 4 are evenly distributed inside the casing 3. An auxiliary ring 5 is rotatably connected to the outer ring of the bottom end of the screw 2. A sliding rod 6 is fixedly connected to the outer ring of the auxiliary ring 5, and the sliding rod 6 is located within the connecting slides 4. Multiple mounting slots 7 are evenly distributed around the auxiliary ring 5. A double-headed cam 9 is rotatably connected to each mounting slot 7 via a torsion spring shaft 8. Wedge blocks 10 are slidably connected to the upper and lower sides of each mounting slot 7. Multiple safety blocks 11 are evenly slidably connected to the outer ring of the auxiliary ring 5. Each safety block 11 corresponds to one of the mounting slots 7 and is located outside the mounting slot 7. The double-headed cam 9 is located within the wedge blocks 10 on the upper and lower sides of the mounting slot 7. Between, a limiting rod 12 is fixedly connected to the outer side of the double-headed cam 9, and a semi-circular groove 13 is opened on the inner side wall of the mounting groove 7. The limiting rod 12 is located in the semi-circular groove 13 and the two slide in cooperation. A release gear 14 is fixedly connected to the outer wall of the torsion spring shaft 8. A damping gear ring 15 is installed at the bottom of the lead screw 2. The release gear 14 is located above the damping gear ring 15 and meshes with the damping gear ring 15. Positioning pins 16 are elastically connected inside both ends of the double-headed cam 9. Accommodation holes 17 are opened on both sides of the mounting groove 7. An auxiliary ring 5 is located around the periphery of the mounting groove 7 and is equipped with a contacting electromagnet 18 and an adsorption electromagnet 19 respectively. The contacting electromagnet 18 is used to attract the wedge blocks 10 on the upper and lower sides of the mounting groove 7 to move closer to each other. The adsorption electromagnet 19 is used to pull out the positioning pins 16.

[0039] Please see Figure 1-8 15-16. In use, the present invention uses a turbine 1 to drive a lead screw 2 to rise or fall, thereby lifting or lowering the connected object. Initially, or when the turbine 1 is stopped and the height remains constant, multiple safety blocks 11 at the lower end of the lead screw 2 are tightly pressed against the inner wall of the protective sleeve 3. Through the pressing and friction of the safety blocks 11 and the protective sleeve 3, the lead screw 2 is positioned and reinforced while remaining relatively stationary relative to the turbine 1. This prevents the turbine 1 from failing to keep the lead screw 2 stationary in case of an accident. The cooperation of the safety blocks 11 and the protective sleeve 3 limits and protects the lead screw 2, preventing it from sliding freely. This avoids situations where objects already at a certain height fall freely, increasing safety during use and preventing risks. The specific principle is as follows:

[0040] Please see Figure 3 , 57, 9. When the height needs to be changed, disconnect the contact electromagnet 18 and the attraction electromagnet 19. The turbine 1 drives the lead screw 2 to rotate, achieving lifting and lowering. When the lead screw 2 rotates, it drives the damping gear ring 15 below to rotate as well. The damping gear ring 15 drives all the release gears 14 meshing with it above to rotate, overcoming the elastic force of the torsion spring shaft 8 and driving the torsion spring shaft 8 to rotate. This causes the double-headed cam 9 to rotate from a horizontal state to a vertical state. During this process, the wedge blocks 10 on its upper and lower sides are pushed open. The wedge blocks 10 move away from the safety block 11, allowing the safety block 11 to retract and leave the protective cylinder 3, thereby releasing the safety limit and allowing the lead screw 2 to move up and down smoothly. Furthermore, because the damping gear ring 15 drives the multiple small-diameter release gears 14 to rotate, the response speed of the release gears 14 is improved. The screw 2 can be released from its safety limit as soon as the safety block 11 moves away slightly. When the screw 2 continues to rotate, the limiting rod 12 of the double-headed cam 9 is located in the semi-circular groove 13. Therefore, when the double-headed cam 9 rotates to the vertical position, the limiting rod 12 also reaches the end of the semi-circular groove 13, preventing the double-headed cam 9 from continuing to rotate. At this time, the release gear 14 also cannot rotate. The damping gear ring 15 will be relatively stationary with the release gear 14 and rotate relative to the screw 2. This allows the screw 2 to continue to rotate while ensuring that the double-headed cam 9 remains in the vertical position. This keeps the wedge blocks 10 on both sides away from each other, and the safety block 11 does not rub against the protective sleeve 3, thus not affecting the continuous rotation of the screw 2. As a result, the screw 2 can smoothly rise and fall.

[0041] When the lead screw 2 stops at the required height, the contact electromagnet 18 and the attraction electromagnet 19 are energized to generate magnetic force. Through the attraction force of the contact electromagnet 18 on the upper and lower wedge blocks 10 and the elastic restoring force of the torsion spring shaft 8, the torsion spring shaft 8 rotates and the wedge blocks 10 move closer to the contact point on their own. During this process, the safety block 11 is gradually pushed outward and pushed to fit against the protective sleeve 3. When the torsion spring shaft 8 rotates back to its original position, the double-headed cam 9 rotates to a straight state with its two tips facing the two side walls of the mounting groove 7. Under the action of the attraction electromagnet 19, the positioning post 16 inside the double-headed cam 9 is pulled out and enters the receiving hole 17, thereby restricting the double-headed cam 9 from rotating on its own and keeping it in a straight state. This keeps the safety block 11 in contact with the protective sleeve 3 and extended, thus achieving a safety limit. The safety limit is activated immediately when the lead screw 2 stops, which is timely and does not require manual operation, avoiding forgetfulness and greatly improving safety.

[0042] The opening and closing of the bonding electromagnet 18 and the attraction electromagnet 19 can be started by the sensor following the state of the lead screw 2. When the lead screw 2 is stationary, the bonding electromagnet 18 and the attraction electromagnet 19 are activated. When the lead screw 2 needs to rotate, the bonding electromagnet 18 and the attraction electromagnet 19 can be disconnected first. The power supply of the sensor and the bonding electromagnet 18 and the attraction electromagnet 19 can be powered by a separate UPS power supply to ensure that the safety limit can still be effectively activated in case of power failure or other emergencies.

[0043] Please see Figure 15 , 16 The mounting groove 7 is fixedly connected to guide posts 20 on both the upper and lower sides. The wedge block 10 is provided with guide holes 21. The guide posts 20 are located in the guide holes 21 and the two slide together. The mounting groove 7 is provided with a safety hole 22 on one side. The safety block 11 is fixedly connected to a connecting post 23. The connecting post 23 is located in the safety hole 22 and the two slide together.

[0044] Please see Figure 4 , 5 Among them, a spherical slide 24 is provided in the middle of the outer edge of the double-headed cam 9, and a ball head shaft 25 is fixedly connected to the inner side of the wedge-shaped blocks 10 on both the upper and lower sides of the mounting groove 7. The ball head shaft 25 is located in the spherical slide 24 and the two slide together.

[0045] When the double-headed cam 9 rotates, the ball joint shaft 25 and the spherical slide 24 cooperate to force the wedge block 10 to move up and down. The up and down movement of the wedge block 10 can also force the double-headed cam 9 to rotate, reliably bringing the wedge block 10 back and squeezing the safety block 11 outward. When starting with magnetic attraction, the force of the damping gear ring 15 can be overcome by the dual action of magnetic attraction and torsion spring, so that the release gear 14 can rotate in the opposite direction, while the damping gear ring 15 is pressed down to ensure stable operation.

[0046] Please see Figure 4 , 5 12, 13, wherein the damping gear ring 15 includes a base ring 26 fixedly connected to the bottom of the lead screw 2, a damping ring 27 slidably connected to the top of the base ring 26, a top gear ring 28 rotatably connected to the base ring 26, the top gear ring 28 being located above the damping ring 27, and mating round teeth 29 fixedly connected to the bottom of the top gear ring 28 and the top of the damping ring 27, and the mating round teeth 29 of the two are engaged, and a meshing spring 30 is installed between the base ring 26 and the damping ring 27.

[0047] When the double-headed cam 9 is in a vertical position, the limiting rod 12 is located at the end of the semi-circular groove 13, and the lead screw 2 continues to rotate, the torsion spring shaft 8 and the release gear 14 can no longer be rotated. The continued rotation of the lead screw 2 will continue to drive the base ring 26 to rotate. At this time, the base ring 26 rotates, while the top gear ring 28 does not rotate. Under the continuous rotation of the lead screw 2, the damping ring 27 and the top gear ring 28 will overcome the friction between the mating round teeth 29 and rotate relative to each other, and the damping ring 27 will be pressed down, so that the top gear ring 28 does not rotate while the base ring 26 can still rotate, adapting to the state where the lead screw 2 needs to continue to rotate while the torsion spring shaft 8 does not need to rotate.

[0048] When the lead screw 2 stops and the double-headed cam 9 needs to return from the vertical state to the horizontal state, the torsion spring shaft 8 and the release gear 14 need to rotate. At this time, the lead screw 2 does not rotate. Under the action of the elastic force of the torsion spring shaft 8 and the magnetic force of the electromagnet 18, the friction between the damping ring 27 and the top gear ring 28 and the mating round teeth 29 is overcome, causing the top gear ring 28 to rotate, while the base ring 26 does not rotate, adapting to the rotation of the torsion spring shaft 8 to return.

[0049] Because a magnetic attraction force is added during the recovery, and the combination of the magnetic attraction force and the elastic force of the torsion spring shaft 8 is greater than the damping of the damping gear ring 15, while the elastic force of the torsion spring shaft 8 is less than the damping of the damping gear ring 15, it is possible to achieve the above-mentioned rotation of the lead screw 2 while the double-headed cam 9 can remain in a vertical state, and the double-headed cam 9 can return to its original state when the lead screw 2 is stationary.

[0050] Please see Figure 8-11 The outer ring of the sleeve 3 is equipped with a lubrication ring 31, and a compression ring 32 is slidably connected inside the lubrication ring 31. A folded sealing sheet 33 is connected between the upper part of the slide rod 6 and the connecting slide 4. An air inlet 34 is opened at the top of the connecting slide 4, which communicates with the lower part of the compression ring 32 of the lubrication ring 31. An oil passage hole 35 is opened on the side wall of the lubrication ring 31 above the compression ring 32, which communicates with the inside of the sleeve 3. A wiping ring 36 is connected inside the sleeve 3, and the wiping ring 36 is attached to the outlet of the oil passage hole 35. The wiping ring 36 is located on the outer ring of the lead screw 2.

[0051] The lubrication ring 31 has a one-way conical hole 37 at its bottom, and a sealing ball 38 is installed inside the one-way conical hole 37. The connecting slide 4 also has an adjustment hole 39 that communicates with the outside. The adjustment hole 39 is located below the air inlet 34. The inner ring of the protective sleeve 3 is connected to a C-shaped ring 40, and a wiping ring 36 is installed inside the C-shaped ring 40. The wiping ring 36 is a sponge ring.

[0052] To facilitate routine maintenance, the auxiliary ring 5 rises along with the lead screw 2 during its ascent, while the slide rod 6 slides upward along the connecting slide rail 4. During this upward movement, the air in the sealed space between the slide rod 6, the connecting slide rail 4, and the folded sealing plate 33 is continuously squeezed through the air inlet 34 into the space below the compression ring 32 of the lubrication ring 31. This causes the compression ring 32 to move slightly upward, thereby squeezing out the pre-filled lubricating oil above the compression ring 32 from the oil outlet 35. This oil is then absorbed by the wiping ring 36 and wiped onto the lead screw 2, thus automatically performing routine lubrication and maintenance during use, which is beneficial for the stable and long-term operation of the equipment.

[0053] As the lead screw 2 descends, the slide rod 6 moves down along the connecting slide 4, and the sealing space between the slide rod 6, the connecting slide 4, and the folded sealing sheet 33 continuously increases. At this time, the sealing ball 38 in the one-way conical hole 37 floats upward and connects with the outside. Outside air enters the space above the slide rod 6 and the connecting slide 4, allowing the slide rod 6 to move freely downward while the compression ring 32 remains unaffected.

[0054] The sponge ring can store and absorb lubricating oil. The lubricating oil squeezed out when the lead screw 2 rises will keep the sponge ring moist, thus ensuring the maintenance effect. The position of the adjustment hole 39 can be opened at a suitable height according to maintenance needs and usage scenarios. The slide bar 6 only starts to squeeze lubricating oil when it reaches a height above the adjustment hole 39. That is, oil is only released when the lead screw 2 rises to a certain height. The appropriate oil release frequency can be selected according to the height frequency of the lead screw 2.

[0055] Please see Figure 1 , 14 The turbine 1 has a cleaning ring 41 rotatably connected to the top of its housing. The cleaning ring 41 is sleeved on the outside of the lead screw 2. The turbine 1 has a cleaning rod 42 slidably connected to the top of its housing. The cleaning rod 42 is located inside the cleaning ring 41. The inner ring of the cleaning ring 41 is fixedly connected to a tapered plate 43. The top of the turbine 1's housing is rotatably connected to a friction wheel 44. The friction wheel 44 is located between the cleaning ring 41 and the lead screw 2 and is in contact with the outer walls of both. The rotation of the lead screw 2 drives the friction wheel 44 to rotate, thereby driving the cleaning ring 41 to rotate.

[0056] The turbine 1 has a mounting bracket 45 fixedly connected to the top of its casing. The cleaning rod 42 has a brush 46 fixedly connected to its end and a window 47 in the middle. The mounting bracket 45 passes through the window 47 and the two slide together. A cleaning spring 48 is fixedly connected between the mounting bracket 45 and the window 47. The friction wheel 44 is rotatably connected to the top of the turbine 1's casing via a one-way shaft.

[0057] When the lead screw 2 rises, the exposed part of the rod is more likely to be covered with dust and debris. When the lead screw 2 is lowered and retracted, it will also carry some dust and debris. This will affect the cooperation between the turbine 1 and the lead screw 2. When the lead screw 2 rotates and descends for retraction, the friction wheel 44 will rotate through friction, which will in turn drive the cleaning ring 41 to rotate. The rotation of the cleaning ring 41 will cause the gradually protruding plate 43 to gradually enter behind the cleaning rod 42 and squeeze it towards the lead screw 2. When the gradually protruding plate 43 rotates until the cleaning rod 42 is fully extended, the brush 46 will contact the lead screw 2 and clean the outer spiral. During the rotation, the impurities on the surface will be swept away. During the retraction, the sticky impurities will be collected at the upper end of the lead screw 2, which has a smaller impact and is easier to clean later.

[0058] When the lead screw 2 is not rotating, the cleaning spring 48 pushes the cleaning rod 42 back, thereby causing the cleaning ring 41 to reverse and return to its original position, facilitating the next cleaning. When the lead screw 2 rises, its rotation direction is opposite to that when the lead screw 2 descends. When the lead screw 2 rises, since the friction wheel 44 rotates in one direction, it can only be driven by the rotation of the lead screw 2 when it descends. Therefore, the friction wheel 44 slips between itself and the lead screw 2 at this time, and the friction wheel 44 will not rotate. As a result, the brush 46 will not approach the lead screw 2 and will not clean when the lead screw 2 rises, but only when the lead screw 2 descends, thereby controlling the direction of impurity accumulation and preventing it from accumulating downwards.

[0059] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A worm gear screw jack, comprising a turbine (1), a screw (2), and a casing (3), wherein the screw (2) is located inside the casing (3), and the casing (3) is connected to the bottom of the turbine (1), characterized in that: The casing (3) has a connecting slide (4) evenly distributed inside. The bottom outer ring of the lead screw (2) is rotatably connected to an auxiliary ring (5). The outer ring of the auxiliary ring (5) is fixedly connected to a slide rod (6). The slide rod (6) is located in the connecting slide (4) and the two slide together. The auxiliary ring (5) has multiple mounting grooves (7) evenly distributed around its circumference. Each mounting groove (7) is rotatably connected to a double-headed cam (9) through a torsion spring shaft (8). The upper and lower sides of the mounting groove (7) are slidably connected to wedge blocks (10). The outer ring of the auxiliary ring (5) is evenly connected to multiple... Safety block (11), the safety block (11) corresponds one-to-one with the mounting groove (7) and is located on the outside of the mounting groove (7), the double-headed cam (9) is located in the middle of the wedge blocks (10) on the upper and lower sides of the mounting groove (7), the outer side of the double-headed cam (9) is fixedly connected to the limiting rod (12), the inner side wall of the mounting groove (7) is provided with a semi-circular arc groove (13), the limiting rod (12) is located in the semi-circular arc groove (13) and the two slide in cooperation, the outer wall of the torsion spring shaft (8) is fixedly connected to the release gear (14), the bottom of the lead screw (2) is equipped with a damping gear ring (14). 5), the release gear (14) is located above the damping gear ring (15) and meshes with the damping gear ring (15). The double-headed cam (9) has a positioning pin (16) elastically connected inside both ends. The mounting groove (7) has a receiving hole (17) on both sides. The auxiliary ring (5) is located around the mounting groove (7) and is equipped with a contacting electromagnet (18) and an adsorption electromagnet (19) respectively. The contacting electromagnet (18) is used to attract the wedge blocks (10) on the upper and lower sides of the mounting groove (7) to move closer to each other. The adsorption electromagnet (19) is used to move the positioning pin (16) to the positioning pin (17). 6) Adsorption and pull-out; The damping gear ring (15) includes a base ring (26) fixedly connected to the bottom of the lead screw (2), a damping ring (27) slidably connected to the top of the base ring (26), a top gear ring (28) rotatably connected to the base ring (26), the top gear ring (28) is located above the damping ring (27), the bottom of the top gear ring (28) and the top of the damping ring (27) are both fixedly connected with mating round teeth (29) and the mating round teeth (29) of the two are engaged, and a meshing spring (30) is installed between the base ring (26) and the damping ring (27).

2. The worm gear screw jack according to claim 1, characterized in that: The mounting groove (7) is fixedly connected to guide posts (20) on both the upper and lower sides. The wedge block (10) is provided with guide holes (21) inside. The guide posts (20) are located in the guide holes (21) and the two slide together. The mounting groove (7) is provided with a safety hole (22) on one side. The safety block (11) is fixedly connected to a connecting post (23) inside. The connecting post (23) is located in the safety hole (22) and the two slide together.

3. The worm gear screw jack according to claim 1, characterized in that: The double-headed cam (9) has a spherical slide (24) in the middle of its outer edge. The wedge-shaped blocks (10) on both sides of the mounting groove (7) are fixedly connected to the inner side of the ball head shaft (25). The ball head shaft (25) is located in the spherical slide (24) and the two slide together.

4. The worm gear screw jack according to claim 1, characterized in that: The outer ring of the sleeve (3) is equipped with a lubricating ring (31), and a compression ring (32) is slidably connected inside the lubricating ring (31). A folded sealing sheet (33) is connected between the upper part of the slide rod (6) and the connecting slide (4). An air inlet (34) is opened at the top of the connecting slide (4) and communicates with the lower part of the compression ring (32) of the lubricating ring (31). An oil passage hole (35) communicating with the inside of the sleeve (3) is opened on the side wall of the lubricating ring (31) above the compression ring (32). A wiping ring (36) is connected inside the sleeve (3). The wiping ring (36) is attached to the outlet of the oil passage hole (35). The wiping ring (36) is located on the outer ring of the lead screw (2).

5. The worm gear screw jack according to claim 4, characterized in that: The lubrication ring (31) has a one-way conical hole (37) at the bottom, and a sealing ball (38) is installed in the one-way conical hole (37). The connecting slide (4) also has an adjustment hole (39) that communicates with the outside. The adjustment hole (39) is located below the air inlet (34). The inner ring of the protective sleeve (3) is connected to a C-shaped ring (40). The wiping ring (36) is installed in the C-shaped ring (40). The wiping ring (36) is a sponge ring.

6. The worm gear screw jack according to claim 1, characterized in that: A cleaning ring (41) is rotatably connected to the top of the turbine (1) housing. The cleaning ring (41) is sleeved on the outside of the lead screw (2). A cleaning rod (42) is slidably connected to the top of the turbine (1) housing. The cleaning rod (42) is located inside the cleaning ring (41). A tapered plate (43) is fixedly connected to the inner ring of the cleaning ring (41). A friction wheel (44) is rotatably connected to the top of the turbine (1) housing. The friction wheel (44) is located between the cleaning ring (41) and the lead screw (2) and is in contact with the outer walls of both. The rotation of the lead screw (2) drives the friction wheel (44) to rotate, thereby driving the cleaning ring (41) to rotate.

7. The worm gear screw jack according to claim 6, characterized in that: A mounting bracket (45) is fixedly connected to the top of the turbine (1) housing. A brush (46) is fixedly connected to the end of the cleaning rod (42) and a window (47) is provided in the middle. The mounting bracket (45) passes through the window (47) and the two slide together. A cleaning spring (48) is fixedly connected between the mounting bracket (45) and the window (47). The friction wheel (44) is rotatably connected to the top of the turbine (1) housing via a one-way shaft.

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