A lightweight lifting combined speed reducer

Abstract

This invention discloses a lightweight lifting combined reducer, including a frame and a motor. A fixed frame is provided on the side of the frame, and a reduction mechanism is provided inside the frame. The motor is connected to the side of the fixed frame, and a high-temperature protection mechanism is provided at the connection between the motor and the reduction mechanism. A fixed roller is provided on the side of the frame, and an overload protection mechanism is provided inside the fixed roller. When the device is overloaded, the resistance on the support column and the fixed roller will increase. When the resistance on the fixed roller and the support column is too large, the connection between the output shaft and the support column, and between the support column and the fixed roller will be disconnected, thereby preventing the device from overloading. An induction coil is provided on the outside of the fixed roller, and the rotational speed of the fixed roller can be detected through the second magnetic pole. By measuring the rotational speed of the fixed roller and the input shaft, the operating status of the device can be monitored.

Description

Technical Field

[0001] This invention relates to the field of speed reducer technology, specifically a lightweight lifting combined speed reducer. Background Technology

[0002] A speed reducer is an independent component consisting of gear drives, worm drives, or gear-worm drives enclosed in a rigid housing. It is commonly used as a speed reduction transmission device between a prime mover and a working machine, matching speeds and transmitting torque between the prime mover and the working machine or actuator. It is widely used in modern machinery. Speed ​​reducers can increase the torque of a device, thereby enabling the lifting of materials. However, general speed reducers also have some drawbacks in use, such as:

[0003] Ordinary speed reducers often experience high temperatures during prolonged use or overload operation. Since they typically don't monitor temperature, they cannot be stopped promptly when overheating occurs, leading to dangerous situations. Furthermore, during overload transport, the reducer may initially have sufficient power, but as the material rises, it may become insufficient, causing the material to stop mid-air. Because ordinary speed reducers cannot monitor overload transport, this not only damages the reducer but also increases the risk of material falling rapidly from mid-air, causing a safety accident. Summary of the Invention

[0004] The purpose of this invention is to provide a lightweight combined speed reducer for lifting, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a lightweight lifting combined reducer, including a frame and a motor, a fixed frame is provided on the side of the frame, a reduction mechanism is provided inside the frame, the motor is connected to the side of the fixed frame, a high-temperature protection mechanism is provided at the connection between the motor and the reduction mechanism, a fixed roller is provided on the side of the frame, an overload protection mechanism is provided inside the fixed roller, a steel wire rope is wound on the side of the fixed roller, a guide hole is opened inside the lower end of the frame, the interior of the guide hole is inclined, and the guide hole is pierced by the steel wire rope. When lifting materials, the device is in working condition, and When the material is fixed to the device, the device is in a non-operational state. When the device is in use, the fixing frame and the motor are connected with bolts, and then a high-temperature protection mechanism is used to connect the motor and the reduction mechanism. Thus, during continuous use of the device, the high-temperature protection mechanism can play a connecting role. When the device is in a high-temperature state due to continuous use or overload, the high-temperature protection mechanism will lock with the reduction mechanism during the operation of the device, thereby preventing the connection from being broken during the movement of the material. After the heavy object has been moved, when the high-temperature protection mechanism is in a high-temperature state, the motor and the reduction mechanism will no longer be connected, thereby preventing the device from overheating and reducing its lifespan.

[0006] When the device is transported under overload, the mass of the heavy object is significantly greater than the weight limit of the device. The overload protection mechanism connects the device through friction. Therefore, when the device is overloaded, the overload protection mechanism will disconnect, thus preventing the device from being transported under overload.

[0007] During operation, the device simultaneously monitors the rotational speeds of the input shaft and the overload protection mechanism. Since the input shaft only experiences high temperature-induced shutdown and normal rotation, its rotational speed can be compared with that of the overload protection mechanism. If the overload protection mechanism's rotational speed does not match the input shaft's speed, it indicates that the overload protection mechanism is loose or that there is excessive internal wear, causing a significant deviation in the device's rotational speed. In such cases, the device needs to be inspected to prevent accidents during use.

[0008] Furthermore, the reduction mechanism includes an input shaft, a sun gear, planetary gears, a planetary carrier, a limiting sleeve, and an output shaft. The input shaft is rotatably mounted on the side of the frame. The sun gear is mounted on the side of the frame, and planetary gears are meshed at equal angles on the side of the sun gear. A planetary carrier is rotatably mounted at the center of the planetary gear, and an output shaft is mounted at the center of the planetary carrier. The output shaft passes through the side of the frame, and a limiting sleeve is mounted on the side of the planetary gear. When the device is in use, the input shaft rotates, which drives the sun gear to rotate. The rotation of the sun gear drives the planetary gears to rotate. Since the diameter of the sun gear is much larger than the diameter of the planetary gears, the planetary gears reduce the rotational speed of the device and increase the torque of the device, thereby increasing the lifting force of the device and facilitating its use.

[0009] Furthermore, the diameter of the sun gear is larger than that of the planetary gear. The planetary gear and the limiting sleeve are meshed together, and the limiting sleeve and the frame are rotatably connected. When the planetary gear rotates, the limiting sleeve limits the planetary gear, thereby ensuring the stability of the planetary gear during rotation. When the planetary gear revolves around the sun gear, it drives the planetary carrier and the output shaft to rotate, thereby transmitting the power of the device to the outside through the output shaft. Compared with the sun gear, the output shaft has a lower rotational speed and a higher torque, thereby improving the lifting force of the device.

[0010] Furthermore, the high-temperature protection mechanism includes a power shaft, a fixing hole, a fixing cap, a fixing spring, a piston rod, and a piston ring. The power shaft is located on the side of the motor, and an input shaft is sleeved on the outer side of the power shaft. The input shaft has fixing holes opened at equal angles inside, and a piston ring is installed at the opening of the fixing hole. The piston ring is penetrated by the piston rod, which is slidably connected to the fixing hole. The piston rod is embedded inside the power shaft. A fixing spring is connected inside the fixing cap, and the other end of the fixing spring is connected to the piston rod. When the device is in use, the motor drives the power shaft to rotate. When the power shaft rotates, it drives the input shaft to rotate through the piston rod, thereby driving the reduction mechanism to operate. When the power shaft rotates, because the piston rod is tilted, the piston rod and the power shaft will lock together, thus preventing the piston rod and the power shaft from disconnecting during rotation.

[0011] Furthermore, the diameter of the end of the fixing hole furthest from the power shaft is larger than the diameter of the other end. A fixing cap is threaded on the outer side of the fixing hole, with a hole-like center. When the device is in use, the temperature of the motor rises, causing the temperature of the power shaft to rise as well. This temperature is then transferred to the fixing hole inside the input shaft via the piston rod. Because the inner and outer sides of the fixing hole are sealed by piston rings and the piston rod respectively, the inside of the fixing hole is sealed. Therefore, when the temperature inside the fixing hole, sealed by the piston rings and piston rod, rises, the piston rod moves outward, causing the piston rod to disconnect from the power shaft.

[0012] When the device is operating, one end of the piston rod rotates forward with the power shaft, while the other end of the piston rod drives the input shaft to rotate. When the input shaft moves, it is subject to resistance from the material, and this resistance is transmitted to the piston rod through the input shaft. As a result, the piston rod deflects under the action of resistance and rotates on its fixed axis. At this time, the piston rod will deflect, which increases the pressure between the piston rod and the power shaft and input shaft. This pressure is converted into frictional force on the piston rod, thereby preventing the piston rod from slipping during device operation.

[0013] When the device stops moving, its position is adjusted by rotating the fixing cap. When the position of the fixing cap changes, the compression degree of the fixing spring changes accordingly, thereby adjusting the pressure of the fixing spring on the piston rod. When the device is not running, it is only subject to the thrust of the gas in the fixing hole and the pressure of the fixing spring. When the temperature in the fixing hole rises, the thrust of the gas on the piston rod will increase. When the thrust of the fixing spring on the piston rod is less than the thrust of the gas on the piston rod, the piston rod will move outward, causing the piston rod and the power shaft to disconnect, thereby preventing the device from operating under high temperature conditions.

[0014] Furthermore, a first magnetic pole is provided on the outer side of the input shaft, and a second magnetic pole is provided on the outer side of the overload protection mechanism. The first and second magnetic poles are respectively located on the left and right sides of the frame. The first magnetic pole is located on the outer side of the input shaft, and an induction coil is provided on the outer side of the input shaft. Therefore, when the input shaft rotates, an induced current is generated. The faster the input shaft rotates, the larger the induced current is. Thus, the rotational speed of the input shaft is detected by the induced current. The second magnetic pole is located on the outer side of the overload protection mechanism, and the rotational speed of the overload protection mechanism can be detected in the same way. Since the input shaft is connected to the power shaft by the high-temperature protection mechanism, there are only two phenomena when the input shaft is running normally: normal operation and no operation. Thus, the device can be detected for high temperature phenomena by detecting the rotational speed of the input shaft.

[0015] When the weight of the transported goods is too great, a mismatch may occur between the rotational speed of the overload protection mechanism and the rotational speed of the input shaft. In this case, it is necessary to inspect both the device and the transported goods to prevent accidents from happening during transportation.

[0016] Furthermore, the overload protection mechanism includes a support column, a first bevel gear, a second bevel gear, a lead screw, a locking rod, a fixed roller, a limit cap, and a friction layer. The support column is rotatably disposed on the outside of the output shaft. The first bevel gear is disposed on the outside of the output shaft and is rotatably connected to the support column. The second bevel gear is meshed with the outside of the first bevel gear. The lead screw is disposed on the side of the second bevel gear and is rotatably disposed inside the support column. The locking rod is threadedly connected to the outside of the lead screw and is slidably disposed inside the support column. The locking rod is embedded inside the fixed roller, and the connection between the locking rod and the fixed roller is arc-shaped. The fixed roller is rotatably disposed on the outside of the output shaft.

[0017] When the output shaft rotates, it limits the support column, preventing it from rotating with the output shaft. The first bevel gear rotates with the output shaft, while the support column remains stationary. When the first bevel gear rotates, it drives the second bevel gear to rotate, and the lead screw rotates with the second bevel gear. Since the lead screw and the locking rod are threaded together, when the lead screw rotates, it drives the locking rod to move, thus embedding the locking rod inside the fixed rod to fix the fixed rod and the support column.

[0018] When the device is operating normally, the output shaft rotates, causing the support column and fixed roller to rotate as well. The clamping rod is arc-shaped, so when the device is running, the weight provides resistance to the rotation of the fixed roller. This resistance causes the clamping rod to tend to move inward, thus detecting the weight. When the weight is too large, the output shaft, support column, and fixed roller will rotate simultaneously. The thrust from the fixed roller on the clamping rod will be excessive, causing the fixed roller to push the clamping rod inward. During this inward movement, the output shaft rotates, while the support column does not. The second bevel gear and the support column rotate relative to each other, causing the clamping rod to move inward. This prevents the clamping rod from engaging with the fixed roller, and the fixed roller will no longer rotate with the support column. When the fixed roller does not rotate, it cannot move the material, thus preventing the phenomenon of moving an excessively heavy material.

[0019] Furthermore, the output shaft is embedded inside the limiting cap at one end outside the support column. The limiting cap and the support column are threaded together. The inside of the limiting cap is made of rubber material. By rotating the limiting cap, the distance between the friction layer and the output shaft is reduced, increasing the friction between them. The fixed rod and the support column are connected by a locking rod. Therefore, when the fixed rod experiences running resistance, the resistance is borne by the locking rod, and the resistance also prevents the output shaft and the support column from rotating coaxially. Since the fixed rod and the support column are connected by a lead screw, the lead screw can weaken the resistance of the device, thus reducing the resistance encountered when the support column rotates. The support column and the output shaft are fixed by the friction of the friction layer, so the friction of the friction layer can be used to lock the output shaft and the support column, thereby ensuring the stability of the device during operation. At the same time, when the device is overloaded, the connection between the output shaft and the support column, and between the support column and the fixed rod, will be disconnected, thereby avoiding overload operation and increasing the service life of the device.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: When the present invention is used, the heat of the motor is transferred to the fixed hole through the power shaft. When the motor runs for too long or is overloaded, the air pressure in the fixed hole will increase. When the power shaft stops rotating, since the power shaft no longer applies resistance to the piston rod, the movement of the piston rod mainly relies on the gas pressure and the elastic force of the fixed spring. Therefore, by adjusting the initial contraction degree of the fixed spring, the initial force of the piston rod can be adjusted, thereby controlling the temperature at which the motor stops running at high temperature and avoiding the phenomenon of the motor overheating. When the device is overloaded, the resistance of the support column and the fixed rod will increase. When the resistance of the fixed rod and the support column is too large, the connection between the output shaft and the support column, and between the support column and the fixed rod will be disconnected, thereby avoiding the phenomenon of device overload. An induction coil is set on the outside of the fixed rod, and the rotation speed of the fixed rod can be detected through the second magnetic pole. By measuring the rotation speed of the fixed rod and the input shaft, the operating status of the device can be monitored. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall front sectional structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the connection structure between the power shaft and the input shaft of the present invention;

[0024] Figure 3This is a schematic diagram of the connection structure between the input shaft and the first magnetic pole of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the frame of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the fixing rod of the present invention;

[0027] Figure 6 This is a schematic diagram of the installation structure of the support column and the limiting cap of the present invention;

[0028] Figure 7 This is a force diagram showing the force on the power shaft and input shaft when they are subjected to resistance.

[0029] Figure 8 This is a schematic diagram of the forces acting on the power shaft and input shaft when they are not subject to external resistance.

[0030] In the diagram: 1. Frame; 2. Fixing frame; 3. Motor; 4. Power shaft; 5. Input shaft; 6. Fixing hole; 7. Fixing cap; 8. Fixing spring; 9. Piston rod; 10. Piston ring; 11. First magnetic pole; 12. Sun gear; 13. Planetary gear; 14. Planetary carrier; 15. Limiting sleeve; 16. Output shaft; 17. Support column; 18. First bevel gear; 19. Second bevel gear; 20. Lead screw; 21. Clamping rod; 22. Fixing roller; 23. Limiting cap; 24. Friction layer; 25. Second magnetic pole; 26. Steel wire rope; 27. Guide hole. Detailed Implementation

[0031] 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.

[0032] like Figure 1As shown, the present invention provides a technical solution: a lightweight lifting combined reducer, including a frame 1 and a motor 3. A fixing frame 2 is provided on the side of the frame 1, and a reduction mechanism is provided inside the frame 1. The motor 3 is connected to the side of the fixing frame 2. A high-temperature protection mechanism is provided at the connection between the motor 3 and the reduction mechanism. A fixing roller 22 is provided on the side of the frame 1, and an overload protection mechanism is provided inside the fixing roller 22. A steel wire rope 26 is wound around the side of the fixing roller 22. A guide hole 27 is opened inside the lower end of the frame 1. The interior of the guide hole 27 is inclined, and the steel wire rope 26 passes through the guide hole 27. When lifting materials, the device is in working state, and when lifting materials... When the device is fixed, it is in a non-working state. When the device is in use, the fixing frame 2 and the motor 3 are connected with bolts. Then, the high temperature protection mechanism is used to connect the motor 3 and the reduction mechanism. During continuous use of the device, the high temperature protection mechanism can play a connecting role. When the device is in a high temperature state due to continuous use or overload, the high temperature protection mechanism will lock with the reduction mechanism during the operation of the device, thereby preventing the connection from being broken during the movement of materials. After the heavy object is moved, when the high temperature protection mechanism is in a high temperature state, the motor 3 and the reduction mechanism will no longer be connected, thereby preventing the device from overheating and reducing the life of the device.

[0033] When the device is transported under overload, the mass of the heavy object is significantly greater than the weight limit of the device. The overload protection mechanism connects the device through friction. Therefore, when the device is overloaded, the overload protection mechanism will disconnect, thus preventing the device from being transported under overload.

[0034] When the device is in use, it will simultaneously detect the rotational speed of the input shaft 5 and the overload protection mechanism. Since the input shaft 5 will only stop rotating due to high temperature and rotate normally, the rotational speed of the input shaft 5 can be compared with the rotational speed of the overload protection mechanism. When the rotational speed of the overload protection mechanism does not match the speed of the input shaft 5, it indicates that the overload protection mechanism is loose or that the internal wear of the device is too great, causing a large deviation in the rotational speed of the device. The device needs to be inspected to avoid accidents during use.

[0035] like Figure 4As shown, the reduction mechanism includes an input shaft 5, a sun gear 12, a planetary gear 13, a planetary carrier 14, a limiting sleeve 15, and an output shaft 16. The input shaft 5 is rotatably mounted on the side of the frame 1. The sun gear 12 is mounted on the side of the frame 1, and the planetary gear 13 is meshed with the side of the sun gear 12 at equal angles. The planetary carrier 14 is rotatably mounted at the center of the planetary gear 13, and the output shaft 16 is mounted at the center of the planetary carrier 14. The output shaft 16 passes through the side of the frame 1, and the limiting sleeve 15 is mounted on the side of the planetary gear 13. When the device is in use, the input shaft 5 rotates, which drives the sun gear 12 to rotate. The rotation of the sun gear 12 drives the planetary gear 13 to rotate. Since the diameter of the sun gear 12 is much larger than the diameter of the planetary gear 13, the planetary gear 13 reduces the rotational speed of the device and increases the torque of the device, thereby increasing the lifting force of the device and facilitating its use.

[0036] The diameter of the sun gear 12 is larger than that of the planetary gear 13. The planetary gear 13 and the limiting sleeve 15 are meshed together, and the limiting sleeve 15 and the frame 1 are rotatably connected. When the planetary gear 13 rotates, the limiting sleeve 15 limits the planetary gear 13, thereby ensuring the stability of the planetary gear 13 during rotation. When the planetary gear 13 revolves around the sun gear 12, it drives the planetary carrier 14 and the output shaft 16 to rotate, thereby transmitting the power of the device to the outside through the output shaft 16. Compared with the sun gear 12, the output shaft 16 has a lower rotational speed and a higher torque, thereby improving the lifting force of the device.

[0037] like Figure 2 , Figure 7 and Figure 8 As shown, the high-temperature protection mechanism includes a power shaft 4, a fixing hole 6, a fixing cap 7, a fixing spring 8, a piston rod 9, and a piston ring 10. The power shaft 4 is located on the side of the motor 3, and an input shaft 5 is sleeved on the outside of the power shaft 4. The fixing hole 6 is opened at equal angles inside the input shaft 5, and a piston ring 10 is installed at the opening inside the fixing hole 6. The piston ring 10 is penetrated by the piston rod 9, and the piston rod 9 is slidably connected to the fixing hole 6. The piston rod 9 is embedded inside the power shaft 4. The fixing cap 7 is connected to the fixing spring 8, and the other end of the fixing spring 8 is connected to the piston rod 9. When the device is in use, the motor 3 drives the power shaft 4 to rotate. When the power shaft 4 rotates, it drives the input shaft 5 to rotate through the piston rod 9, thereby driving the reduction mechanism to operate. When the power shaft 4 rotates, because the piston rod 9 is tilted, the piston rod 9 and the power shaft 4 will be locked together, thus preventing the piston rod 9 and the power shaft 4 from disconnecting during rotation.

[0038] The diameter of the end of the fixing hole 6 furthest from the power shaft 4 is larger than the diameter of the other end of the fixing hole 6. A fixing cap 7 is threaded inside the outer side of the fixing hole 6, and the center of the fixing cap 7 is hole-shaped. When the device is in use, the temperature of the motor 3 will rise, which will cause the temperature of the power shaft 4 to rise. The temperature of the power shaft 4 will be transferred to the fixing hole 6 inside the input shaft 5 through the piston rod 9. Since the inner and outer sides of the fixing hole 6 are blocked by the piston ring 10 and the piston rod 9 respectively, the inside of the fixing hole 6 is in a sealed state. Therefore, when the temperature inside the fixing hole 6 sealed by the piston ring 10 and the piston rod 9 rises, the piston rod 9 will move outward, which will cause the piston rod 9 to be disconnected from the power shaft 4.

[0039] When the device is in operation, one end of the piston rod 9 rotates with the power shaft 4, while the other end of the piston rod 9 drives the input shaft 5 to rotate. When the input shaft 5 moves, it will be subject to resistance from the material, and the resistance of the material will also be transmitted to the piston rod 9 through the input shaft 5. Since the piston rod 9 is subjected to opposite axial forces from the power shaft 4 and the input shaft 5, the piston rod 9 will rotate around the center point of the contact end between the piston rod 9 and the power shaft 4 and the input shaft 5, which increases the pressure between the piston rod 9 and the power shaft 4 and the input shaft 5. As the pressure increases, the friction force on the piston rod 9 will also increase, thereby preventing the piston rod 9 from slipping during device operation.

[0040] When the device stops moving, its position is adjusted by rotating the fixing cap 7. When the position of the fixing cap 7 changes, the compression degree of the fixing spring 8 changes accordingly, thereby adjusting the pressure of the fixing spring 8 on the piston rod 9. When the device is not running, it is only subjected to the thrust of the gas in the fixing hole 6 and the pressure of the fixing spring 8. When the temperature in the fixing hole 6 rises, the thrust of the gas on the piston rod 9 will increase. When the thrust of the fixing spring 8 on the piston rod 9 is less than the thrust of the gas on the piston rod 9, the piston rod 9 will move outward, causing the piston rod 9 and the power shaft 4 to disconnect, thereby preventing the device from working under high temperature conditions.

[0041] like Figure 3As shown, a first magnetic pole 11 is provided on the outer side of the input shaft 5, and a second magnetic pole 25 is provided on the outer side of the overload protection mechanism. The first magnetic pole 11 and the second magnetic pole 25 are respectively provided on the left and right sides of the frame 1. The first magnetic pole 11 is located on the outer side of the input shaft 5, and an induction coil is provided on the outer side of the input shaft 5. Therefore, when the input shaft 5 rotates, an induced current will be generated. The faster the rotation speed of the input shaft 5, the larger the induced current. Thus, the rotation speed of the input shaft 5 can be detected by the induced current. The second magnetic pole 25 is located on the outer side of the overload protection mechanism. Similarly, the rotation speed of the overload protection mechanism can be detected. Since the input shaft 5 is connected to the power shaft 4 by the high temperature protection mechanism, there will only be two phenomena when the input shaft 5 is running normally: normal operation and no operation. Thus, the device can be detected for high temperature by detecting the rotation speed of the input shaft 5.

[0042] When the weight of the transported goods is too great, a mismatch may occur between the rotational speed of the overload protection mechanism and the rotational speed of the input shaft 5. In this case, it is necessary to inspect both the device and the transported goods to prevent accidents from happening during transportation.

[0043] like Figure 4 As shown, the overload protection mechanism includes a support column 17, a first bevel gear 18, a second bevel gear 19, a lead screw 20, a locking rod 21, a fixed rod 22, a limit cap 23, and a friction layer 24. The support column 17 is rotatably disposed on the outside of the output shaft 16. The first bevel gear 18 is disposed on the outside of the output shaft 16 and is rotatably connected to the support column 17. The second bevel gear 19 is meshed on the outside of the first bevel gear 18. The lead screw 20 is disposed on the side of the second bevel gear 19 and is rotatably disposed inside the support column 17. The locking rod 21 is threadedly connected to the outside of the lead screw 20 and is slidably disposed inside the support column 17. The locking rod 21 is embedded in the fixed rod 22 and the connection between the locking rod 21 and the fixed rod 22 is arc-shaped. The fixed rod 22 is rotatably disposed on the outside of the output shaft 16.

[0044] When the output shaft 16 rotates, it limits the support column 17, so the support column 17 will not rotate with the output shaft 16. The first bevel gear 18 will rotate with the output shaft 16, while the support column 17 will not rotate. When the first bevel gear 18 rotates, it will drive the second bevel gear 19 to rotate, and the lead screw 20 will rotate with the second bevel gear 19. Since the lead screw 20 and the locking rod 21 are threadedly connected, when the lead screw 20 rotates, it will drive the locking rod 21 to move, so that the locking rod 21 is embedded in the fixed rod 22 to fix the fixed rod 22 and the support column 17.

[0045] When the device is operating normally, the output shaft 16 rotates, causing the support column 17 and the fixed rod 22 to rotate as well. Since the clamping rod 21 is arc-shaped, the weight provides resistance to the rotation of the fixed rod 22 during operation. This resistance causes the clamping rod 21 to tend to move inward, thus detecting the weight's mass. When the weight is too large, the output shaft 16, support column 17, and fixed rod 22 will rotate simultaneously, resulting in excessive thrust on the clamping rod 21 from the fixed rod 22. 2 will push the clamping rod 21 to move inward. During the inward movement of the clamping rod 21, the output shaft 16 will rotate, while the support column 17 will not rotate with the output shaft 16. The second bevel gear 19 and the support column 17 will rotate relative to each other, causing the clamping rod 21 to move inward. As a result, the clamping rod 21 will no longer engage with the fixed roller 22, and the fixed roller 22 will no longer rotate with the support column 17. When the fixed roller 22 does not rotate, it will not be able to move the material, thus avoiding the phenomenon of moving the material even when it is too heavy.

[0046] like Figure 5 As shown, one end of the output shaft 16, located outside the support column 17, is embedded inside the limit cap 23. The limit cap 23 and the support column 17 are threaded together. The inside of the limit cap 23 is made of rubber material. By rotating the limit cap 23, the distance between the friction layer 24 and the output shaft 16 is reduced, increasing the friction between them. The fixed rod 22 and the support column 17 are connected by a locking rod 21. Therefore, when the fixed rod 22 is subjected to running resistance, the resistance is borne by the locking rod 21. The resistance also prevents the output shaft 16 and the support column 17 from rotating coaxially. Because the fixed rod 22 and the support column 17 are connected by a locking rod 21... The connection is made via a lead screw, which reduces the resistance of the device, thus reducing the resistance encountered when the support column 17 rotates. The support column 17 and the output shaft 16 are fixed by the friction of the friction layer 24, which can lock the output shaft 16 and the support column 17, thereby ensuring the stability of the device during operation. At the same time, when the device is overloaded, the connection between the output shaft 16 and the support column 17, and between the support column 17 and the fixed roller 22, will be disconnected, thereby avoiding overload operation and increasing the service life of the device.

[0047] The working principle of this invention is as follows: When the device is operating normally, the power shaft 4 drives the input shaft 5 to rotate, which in turn drives one end of the piston rod 9 to rotate in the forward direction. At the same time, the input shaft 5 is subjected to resistance from the material during operation. This resistance is transmitted to the other end of the piston rod 9 through the input shaft 5, resulting in opposite forces on both ends of the piston rod 9 during operation. This increases the resistance between the piston rod 9 and the power shaft 4 and input shaft 5, preventing slippage between the piston rod 9 and the power shaft 4. When the device reaches the material loading stage, it stops moving and is not subjected to resistance. Therefore, the piston rod 9 is only pushed by air pressure and the elastic force of the fixing spring 8. When the air pressure pushing force on the piston rod 9 is too large, the connection between the power shaft 4 and the piston ring 10 will be broken, thus preventing the device from overheating.

[0048] The fixed roller 22 and the support column 17 are connected by a screw structure. When the device is transporting a large object, the resistance of the clamping rod 21 is too great and it will contract, thus disconnecting the connection between the fixed roller 22 and the support column 17. The output shaft 16 and the support column 17 are connected by the resistance between the output shaft 16 and the friction layer 24. When the resistance is too great, the connection between the output shaft 16 and the support column 17 will also be disconnected. Therefore, the device can avoid overload operation. Furthermore, by adjusting the initial position of the limit cap 23 and the position of the clamping rod 21 embedded in the fixed roller 22, the force of overload operation of the device can be adjusted, thereby adjusting the device according to the actual situation.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lightweight lifting combined reducer, comprising a frame (1) and a motor (3), characterized in that: A fixing frame (2) is provided on the side of the frame (1), and a deceleration mechanism is provided inside the frame (1). A motor (3) is connected to the side of the fixing frame (2). A high-temperature protection mechanism is provided at the connection between the motor (3) and the deceleration mechanism. A fixing rod (22) is provided on the side of the frame (1). An overload protection mechanism is provided inside the fixing rod (22). A steel wire rope (26) is wound around the side of the fixing rod (22). A guide hole (27) is opened inside the lower end of the frame (1). The inside of the guide hole (27) is inclined. The guide hole (27) is pierced by the steel wire rope (26). The high-temperature protection mechanism includes a power shaft (4), a fixing hole (6), a fixing cap (7), a fixing spring (8), a piston rod (9), and a piston ring (10). The power shaft (4) is located on the side of the motor (3). An input shaft (5) is sleeved on the outside of the power shaft (4). The input shaft (5) has a fixing hole (6) at equal angles inside. A piston ring (10) is provided at the opening inside the fixing hole (6). The piston ring (10) is penetrated by the piston rod (9). The piston rod (9) is slidably connected to the fixing hole (6). The piston rod (9) is embedded inside the power shaft (4). A fixing spring (8) is connected inside the fixing cap (7). The other end of the fixing spring (8) is connected to the piston rod (9). The diameter of the end of the fixing hole (6) away from the power shaft (4) is larger than the diameter of the other end of the fixing hole (6). A fixing cap (7) is provided with an internal thread on the outer side of the fixing hole (6). The center of the fixing cap (7) is hole-shaped. The input shaft (5) is provided with a first magnetic pole (11) on its outer side, and the overload protection mechanism is provided with a second magnetic pole (25) on its outer side. The first magnetic pole (11) and the second magnetic pole (25) are respectively provided on the left and right sides of the frame (1).

2. The lightweight lifting combined speed reducer according to claim 1, characterized in that: The reduction mechanism includes an input shaft (5), a sun gear (12), a planetary gear (13), a planet carrier (14), a limiting sleeve (15), and an output shaft (16). The input shaft (5) is rotatably disposed on the side of the frame (1). The side of the frame (1) is provided with a sun gear (12). The side of the sun gear (12) is connected to the planetary gear (13) at equal angles. The planetary carrier (14) is rotatably disposed at the center of the planetary gear (13). The center of the planetary carrier (14) is provided with an output shaft (16). The output shaft (16) passes through the side of the frame (1). The side of the planetary gear (13) is provided with a limiting sleeve (15).

3. A lightweight lifting combined speed reducer according to claim 2, characterized in that: The diameter of the sun gear (12) is larger than the diameter of the planetary gear (13). The planetary gear (13) and the limiting sleeve (15) are meshed together, and the limiting sleeve (15) and the frame (1) are rotatably connected.

4. A lightweight lifting combined speed reducer according to claim 1, characterized in that: The overload protection mechanism includes a support column (17), a first bevel gear (18), a second bevel gear (19), a lead screw (20), a locking rod (21), a fixing rod (22), a limit cap (23), and a friction layer (24). The support column (17) is rotatably disposed on the outside of the output shaft (16). The first bevel gear (18) is disposed on the outside of the output shaft (16). The first bevel gear (18) is rotatably connected to the support column (17). The second bevel gear is meshed with the outside of the first bevel gear (18). (19) A lead screw (20) is provided on the side of the second bevel gear (19). The lead screw (20) is rotatably disposed inside the support column (17). A locking rod (21) is threadedly connected to the outside of the lead screw (20). The locking rod (21) is slidably disposed inside the support column (17). The locking rod (21) is embedded in the fixed rod (22). The connection between the locking rod (21) and the fixed rod (22) is arc-shaped. The fixed rod (22) is rotatably disposed outside the output shaft (16).

5. A lightweight lifting combined speed reducer according to claim 4, characterized in that: The output shaft (16) is embedded in the inside of the limiting cap (23) at one end outside the support column (17). The limiting cap (23) and the support column (17) are connected by threads. The inside of the limiting cap (23) is made of rubber material.

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