A lifting device with dynamic gravity compensation

Abstract

This utility model relates to a lifting device with dynamic gravity compensation, including a support frame, a transmission lifting device, a sliding frame sliding on the support frame, a fixed pulley group set on the top of the support frame, a tension spring for relieving pressure on the lifting device, a movable pulley group set on the tension spring, and a steel rope for pulling the sliding frame. The lifting device is set inside the support frame; the working end of the lifting device is connected to the sliding frame; a connecting piece is set on the side wall of the support frame; one end of the tension spring is set on the connecting piece; the other end of the tension spring is set on the movable pulley group; the fixed pulley group includes several sets of first pulley bodies; the movable pulley group includes several sets of second pulley bodies; the steel rope is wound around the first pulley bodies and the second pulley bodies in sequence. This invention solves the problem that the transmission structure of traditional lifting devices is relatively simple, often using a single steel wire rope or chain to directly connect the motor and the lifting platform, which cannot effectively amplify the stroke of the steel wire rope.

Description

Technical Field

[0001] This utility model relates to the field of material handling, and in particular to a lifting device with dynamic gravity compensation. Background Technology

[0002] In existing technologies, lifting devices are important equipment for material handling and personnel transportation in fields such as industrial production, warehousing and logistics, and construction. Their operating efficiency, energy consumption, and motor load capacity directly affect the practicality and economy of the equipment. Currently, in traditional lifting devices, the entire weight of the load is borne by the drive motor during operation. When the lifting device moves heavy goods or carries people, the motor needs to output a large torque to drive the load up and down. This not only places extremely high demands on the motor's power and torque parameters, leading to an increase in motor size and cost, but also consumes a lot of energy during operation, which is inconsistent with the development trend of energy conservation and environmental protection. Meanwhile, prolonged operation of the motor under high torque conditions accelerates the wear of internal components, shortens its lifespan, and increases equipment maintenance frequency and costs. Furthermore, sudden load changes or the start-up and braking of the lifting device can cause drastic fluctuations in the torque exerted on the motor, potentially leading to equipment vibration, increased noise, and other problems, thus affecting the stability and safety of the lifting device's operation. In addition, the transmission structure of traditional lifting devices is relatively simple, often using a single wire rope or chain to directly connect the motor and the lifting platform. This structure cannot effectively amplify the stroke of the wire rope. In scenarios with a large lifting height, the motor needs to rotate more times to complete the lifting action, which further increases the workload and energy consumption of the motor. Utility Model Content

[0003] This application provides a lifting device with dynamic gravity compensation, which solves the problem that the transmission structure of traditional lifting devices in the prior art is relatively simple, and they mostly use a single wire rope or chain to directly connect the motor and the lifting platform. This structure cannot effectively amplify the stroke of the wire rope.

[0004] The technical solutions adopted in the embodiments of this application are as follows.

[0005] A lifting device with dynamic gravity compensation includes a support frame, a transmission lifting device, a sliding frame sliding on the support frame, a fixed pulley group disposed on the top of the support frame, a tension spring for relieving pressure on the lifting device, a movable pulley group disposed on the tension spring, and a steel cable for pulling the sliding frame; the lifting device is disposed inside the support frame; the working end of the lifting device is connected to the sliding frame; a connecting member is disposed on the side wall of the support frame; one end of the tension spring is disposed on the connecting member; the other end of the tension spring is disposed on the movable pulley group; the fixed pulley group includes several sets of first pulley bodies; the movable pulley group includes several sets of second pulley bodies; the steel cable is sequentially wound around the first pulley bodies and the second pulley bodies.

[0006] As a further improvement to the above technical solution: The lifting device includes a first lifting wheel, a driving member that drives the first lifting wheel to rotate, a second lifting wheel disposed on the top of the support, and a transmission belt; the first lifting wheel rotates at the bottom of the support; the driving member is disposed at the bottom of the support and its working end is connected to the first lifting wheel; the transmission belt is wound around the first lifting wheel and the second lifting wheel and one end of the transmission belt is connected to the sliding frame; the driving member drives the transmission belt to unwind or rewind, thereby causing the sliding frame to move up and down.

[0007] The first pulley and the second pulley are each provided with three sets; one end of the steel rope is fixed on the movable pulley group; the steel rope is sequentially wound around the three sets of the first pulley and the three sets of the second pulley; a third pulley is provided on the fixed pulley group; the other end of the steel rope is wound around the third pulley and then fixed on the sliding frame.

[0008] When the lifting device is in operation, the tension spring provides an upward pulling force to the sliding frame to balance the gravity; the movable pulley block and the fixed pulley block can double the stroke of the steel rope.

[0009] The travel multiple is 7 times.

[0010] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. The tension spring provides upward tension to the sliding frame through a movable pulley system, which can balance the load weight in real time and significantly reduce the torque required by the drive components (motor). For example, when the sliding frame is carrying a heavy load, the tension spring directly offsets part of the gravity, reducing the motor's output torque. This not only reduces the requirements for motor power and torque parameters (reducing motor size and cost) but also reduces energy consumption, aligning with energy conservation and environmental protection trends. Simultaneously, the motor is freed from long-term high-torque operation, reducing wear on internal components, extending service life, and significantly lowering maintenance frequency and costs.

[0011] 2. The fixed pulley system (three sets of first pulleys + a third pulley) works in conjunction with the movable pulley system (three sets of second pulleys) to achieve a 7-fold amplification of the steel cable travel. This means that for every unit length the motor-driven conveyor belt or steel cable moves, the sliding frame can complete a 7-unit lifting / lowering movement. This design solves the problem of insufficient travel amplification in traditional devices. In high-lift scenarios, the motor does not need to frequently rotate at high speeds to meet the requirements, reducing the motor's workload and improving lifting efficiency. It is particularly suitable for industrial plants, warehouse racking, and other scenarios requiring a large lifting range.

[0012] 3. The elastic properties of the tension spring can buffer the impact force when the load changes suddenly (such as loading and unloading, starting and braking). Combined with the flexible transmission of the pulley block, it effectively mitigates the drastic fluctuations in motor torque, reducing equipment vibration and noise. Compared with traditional rigid transmission structures, this design makes the lifting process smoother, reduces the risk of component loosening and damage caused by vibration, and improves the safety and reliability of equipment operation.

[0013] 4. The conveyor belt drive, pulley system, and tension spring of the lifting device form a synergistic mechanism: the conveyor belt is responsible for stable power transmission, the pulley system amplifies the stroke, and the tension spring compensates for gravity; the three work together to achieve a more balanced force distribution. This integrated design not only simplifies the traditional complex transmission chain but also enhances the equipment's adaptability to different loads (light and heavy goods, personnel), making it widely applicable in industrial production, warehousing and logistics, construction, and other fields, thus improving the equipment's versatility and practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the lifting device with dynamic gravity compensation in this utility model.

[0015] Figure 2 This is a magnified view of part A in the figure.

[0016] Figure 3 This is a magnified view of part B in the figure.

[0017] Figure 4 This is a magnified view of part C in the figure.

[0018] In the diagram: 1. Support frame; 2. Lifting device; 3. Sliding frame; 4. Fixed pulley block; 5. Tension spring; 6. Movable pulley block; 7. Steel rope; 8. Connecting component; 21. First lifting wheel; 22. Driving component; 23. Second lifting wheel; 24. Conveyor belt; 41. First wheel body; 42. Third wheel body; 61. Second wheel body. Detailed Implementation

[0019] This application provides a lifting device with dynamic gravity compensation, which solves the problem that the transmission structure of traditional lifting devices in the prior art is relatively simple, and they mostly use a single wire rope or chain to directly connect the motor and the lifting platform. This structure cannot effectively amplify the stroke of the wire rope.

[0020] The technical solution in this application embodiment is to solve the above problems, and the overall idea is as follows: To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0021] A lifting device with dynamic gravity compensation includes a support 1, a transmission lifting device 2, a sliding frame 3 sliding on the support 1, a fixed pulley group 4 set on the top of the support 1, a tension spring 5 to relieve pressure on the lifting device 2, a movable pulley group 6 set on the tension spring 5, and a steel rope 7 to pull the sliding frame 3; the lifting device 2 is set inside the support 1; the working end of the lifting device 2 is connected to the sliding frame 3; a connecting member 8 is set on the side wall of the support 1; one end of the tension spring 5 is set on the connecting member 8; the other end of the tension spring 5 is set on the movable pulley group 6; the fixed pulley group 4 includes several sets of first pulley bodies 41; the movable pulley group 6 includes several sets of second pulley bodies 61; the steel rope 7 is wound around the first pulley bodies 41 and the second pulley bodies 61 in sequence.

[0022] The lifting device 2 includes a first lifting wheel 21, a driving member 22 that drives the first lifting wheel 21 to rotate, a second lifting wheel 23 disposed on the top of the support 1, and a transmission belt 24 for transmission; the first lifting wheel 21 rotates at the bottom of the support 1; the driving member 22 is disposed at the bottom of the support 1 and the working end of the driving member 22 is connected to the first lifting wheel 21; the transmission belt 24 is wound around the first lifting wheel 21 and the second lifting wheel 23 and one end of the transmission belt 24 is connected to the sliding frame 3; the driving member 22 drives the transmission belt 24 to unwind or rewind, thereby causing the sliding frame 3 to move up and down.

[0023] The first pulley body 41 and the second pulley body 61 are each provided with three sets; one end of the steel rope 7 is fixed on the movable pulley group 6; the steel rope 7 is wound around the three sets of first pulley bodies 41 and the three sets of second pulley bodies 61 in sequence; a third pulley body 42 is provided on the fixed pulley group 4; the other end of the steel rope 7 is wound around the third pulley body 42 and then fixed on the sliding frame 3.

[0024] When the lifting device 2 is running, the tension spring 5 provides an upward pulling force to the sliding frame 3 to balance the gravity; the movable pulley block 6 and the fixed pulley block 4 can double the stroke of the steel rope 7.

[0025] The travel multiplier is 7.

[0026] The tension spring 5 provides upward tension to the sliding frame 3 through the movable pulley block 6, which can balance the load weight in real time and significantly reduce the torque required by the drive component 22 (motor). For example, when the sliding frame 3 is carrying a heavy object, the tension of the tension spring 5 directly offsets part of the gravity, reducing the output torque of the motor. This not only reduces the parameter requirements for motor power and torque (reducing motor size and cost) but also reduces energy consumption, which is in line with the trend of energy conservation and environmental protection. At the same time, the motor is freed from long-term high-torque operation, the wear of internal components is reduced, the service life is extended, and the maintenance frequency and cost are significantly reduced. The fixed pulley block 4 (three sets of first wheel bodies 41 + third wheel body 42) cooperates with the movable pulley block 6 (three sets of second wheel bodies 61) to realize a 7-fold amplification of the stroke of the steel rope 7. That is, when the motor drives the conveyor belt 24 or the steel rope 7 to move 1 unit length, the sliding frame 3 can complete a 7 unit length of lifting and lowering. This design solves the problem of insufficient stroke amplification in traditional devices. In high-lift scenarios, the motor does not need to frequently rotate at high speeds to meet the requirements, reducing the motor's workload and improving lifting efficiency. It is especially suitable for scenarios requiring a large lifting range, such as industrial plants and warehouse racks. The elasticity of the tension spring 5 can buffer the impact force when the load changes suddenly (such as loading and unloading goods, starting and braking). Combined with the flexible transmission of the pulley block, it effectively alleviates the drastic fluctuations in motor torque, reducing equipment vibration and noise. Compared with the traditional rigid transmission structure, this design makes the lifting process smoother, reduces the risk of component loosening and damage caused by vibration, and improves the safety and reliability of equipment operation. The transmission belt 24 of the lifting device 2 forms a synergistic mechanism with the pulley block and tension spring 5: the transmission belt 24 is responsible for stable power transmission, the pulley block amplifies the stroke, and the tension spring 5 compensates for gravity. The three work together to make the force distribution more balanced. This integrated design not only simplifies the traditional complex transmission link, but also enhances the adaptability of the equipment to different loads (light and heavy goods, personnel). It can be widely used in many fields such as industrial production, warehousing and logistics, and construction, improving the versatility and practicality of the equipment.

[0027] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0028] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A lifting device with dynamic gravity compensation, characterized in that, The system includes a support (1), a lifting device (2) for transmission, a sliding frame (3) that slides on the support (1), a fixed pulley group (4) set on the top of the support (1), a tension spring (5) to relieve the pressure of the lifting device (2), a movable pulley group (6) set on the tension spring (5), and a steel rope (7) that pulls the sliding frame (3). The lifting device (2) is set inside the support (1). The working end of the lifting device (2) is connected to the sliding frame (3). A connecting piece (8) is set on the side wall of the support (1). One end of the tension spring (5) is set on the connecting piece (8). The other end of the tension spring (5) is set on the movable pulley group (6). The fixed pulley group (4) includes several sets of first wheel bodies (41). The movable pulley group (6) includes several sets of second wheel bodies (61). The steel rope (7) is wound around the first wheel body (41) and the second wheel body (61) in sequence.

2. The lifting device with dynamic gravity compensation as described in claim 1, characterized in that, The lifting device (2) includes a first lifting wheel (21), a drive member (22) that drives the first lifting wheel (21) to rotate, a second lifting wheel (23) disposed on the top of the support (1), and a transmission belt (24); the first lifting wheel (21) rotates at the bottom of the support (1); the drive member (22) is disposed at the bottom of the support (1) and the working end of the drive member (22) is connected to the first lifting wheel (21); the transmission belt (24) is wound around the first lifting wheel (21) and the second lifting wheel (23) and one end of the transmission belt (24) is connected to the sliding frame (3); the drive member (22) drives the transmission belt (24) to unwind or rewind, thereby causing the sliding frame (3) to move up and down.

3. The lifting device with dynamic gravity compensation as described in claim 2, characterized in that, The first pulley (41) and the second pulley (61) are each provided with three sets; one end of the steel rope (7) is fixed on the movable pulley group (6); the steel rope (7) is wound around the three sets of the first pulley (41) and the three sets of the second pulley (61) in sequence; a third pulley (42) is provided on the fixed pulley group (4); the other end of the steel rope (7) is wound around the third pulley (42) and then fixed on the sliding frame (3).

4. The lifting device with dynamic gravity compensation as described in claim 1, characterized in that, When the lifting device (2) is running, the tension spring (5) provides an upward pulling force to the sliding frame (3) to balance the gravity; the movable pulley group (6) and the fixed pulley group (4) can double the stroke of the steel rope (7).

5. The lifting device with dynamic gravity compensation as described in claim 4, characterized in that, The travel distance is doubled by a factor of 7.

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