A weight-controlled lifting device

Abstract

This application discloses a weight-controlled lifting device, belonging to the field of lifting equipment machinery. It involves adding multiple sets of winches to the top of the lifting arm, each set corresponding to a main rope. The bottom ends of these main ropes are connected to a pressure detector mounted on the hook via an upper load-bearing cable. The pressure detector measures the weight of the load lifted by the hook and compares it with the maximum lifting capacity of the winches. This allows for the selection of whether to use a single main rope or multiple main ropes in combination to drive the load, achieving reasonable lifting without overloading. The added winding roller, winding belt, and magnetic collar work together to wind up the connected main ropes. This prevents unwinded main ropes from tangling at the bottom when only a single winch or a few winches are used for winding, which could affect normal lifting. This reduces the number of times the drive equipment needs to be used and improves safety.

Description

Technical Field

[0001] This application relates to the field of lifting equipment machinery, and more specifically, to a weight control lifting device. Background Technology

[0002] Lifting equipment begins its vertical or combined vertical and horizontal working stroke immediately after picking up materials. Upon reaching the destination, it unloads the material and then travels empty back to the picking location, completing one work cycle. This process is repeated for the next lifting or transport. Lifting equipment generally consists of a lifting drive structure (crane) and lifting devices, which commonly include specialized rigging such as hooks, wire ropes, and chains.

[0003] Crane hooks and wire ropes, as key components of lifting equipment, are widely used in various loading, unloading, and handling operations. During cargo lifting, workers often cannot accurately ascertain the cargo's weight, leading to the lifting of loads exceeding the winch's maximum lifting capacity. Prolonged overload lifting operations can easily result in safety accidents.

[0004] Therefore, we propose a weight-controlled lifting device to effectively solve the practical problems existing in the prior art. Summary of the Invention

[0005] The purpose of this application is to solve the problem that existing lifting devices cannot clearly determine the weight of the goods, which easily leads to overloading during lifting. Compared with the prior art, this application provides a weight control lifting device, including a lifting boom. A pair of drive boxes are fixedly installed at the top of the lifting boom. Each drive box is equipped with a winch. A main rope is wound on each winch. The lower ends of the two main ropes are connected to an upper load-bearing cable. The lower end of the upper load-bearing cable is connected to an upper stabilizing seat. The lower end of the upper stabilizing seat is connected to a pressure detector. The force measuring end of the pressure detector is connected to a hook. A guide plate is connected to the bottom of the pair of drive boxes. A lifting device is installed on the guide plate. It is equipped with a pair of guide discs, and the guide discs have holes for the main rope to pass through. The upper end of the main rope passes through the holes and the guide discs in sequence and is wound around the winch. Inside one of the drive boxes, there is also a take-up roller located below the side of the winch. The take-up roller is wound with a take-up belt. The lower end of the take-up belt passes through the outside of the drive box and is connected to a magnetic collar that is movably sleeved on the main rope. The bottom end of the magnetic collar is attached to the upper surface of the guide disc, and an electromagnetic plate is embedded inside the guide disc. The drive box is also equipped with an air pump that is connected to the inside of the take-up roller, and one end of the take-up belt is connected to the inside of the take-up roller.

[0006] Furthermore, a lower stabilizing seat is fixedly connected to the top of the hook, and multiple steel cables are distributed on the lower stabilizing seat. The tops of the multiple steel cables are fixedly connected to the force measuring end of the pressure detector through the lifting ring. Through the cooperation of the upper and lower stabilizing seats, the overall lifting stability at the hook is improved. A pressure detector is added between the upper and lower stabilizing seats to detect the weight of the lifted object, so as to clearly know the weight of the goods and select whether to use one main rope alone or two main ropes in combination for driving according to actual needs.

[0007] Furthermore, each of the opposite end walls of the pair of drive boxes has a hollow cavity that communicates with the winch, and a guide roller for guiding the main rope is rotatably installed in the hollow cavity.

[0008] Furthermore, a movable gap is reserved between the bottom of the hollow cavity of the drive box, which houses the take-up roller, and the bottom end face of the guide roller, so as to guide the take-up belt toward the take-up roller.

[0009] Furthermore, the take-up roller has air holes that communicate with its interior. The air pump's air inlet is connected to the air holes via a rotary joint. When only one winch is needed for lifting, the other winch is closed. At this time, the electromagnetic plate on the guide plate is closed, and the magnetic collar is non-positioned with the guide plate. Then, the air pump is used to inflate the magnetic collar through the take-up belt. After the magnetic collar expands, it comes into close contact with the main rope. Finally, the take-up roller is driven to take up the rope. During the rotation of the take-up roller, the main rope at the lower end and the main rope that is pre-wound on the winch are wound up.

[0010] Furthermore, the magnetic collar has a hollow ring structure with an expansion cavity inside, a deformation-resistant flexible layer on the outer end wall, and an elastic layer on the inner end wall.

[0011] Furthermore, the inner ring of the magnetic collar, which is close to the main rope, has compression protrusions. After the magnetic collar is filled with gas, it compresses the elastic layer, and the inner end of the magnetic collar is in close contact with the main rope. The addition of compression protrusions helps to improve the connection stability between the magnetic collar and the main rope. Thus, when the winding tape is wound up, the main rope can be driven upward and wound up together through the magnetic collar.

[0012] Optionally, the pressure detector has an internal movable cavity, with an electromagnetic base at the top of the movable cavity connected to its force measuring end, and a magnetic guide post inside the movable cavity that is magnetically attracted to the electromagnetic base.

[0013] Optionally, a steel pipe is provided at the top of the lifting ring, which extends into the movable cavity and is fixedly connected to the bottom of the magnetic guide post. The outer end wall of the magnetic guide post is distributed with irregular strips, and the inner wall of the movable cavity is provided with an irregular cavity that matches the irregular strips.

[0014] Optionally, a lower load-bearing cable is fixedly connected to one side of the bottom of the upper stabilizing base. The other end of the lower load-bearing cable movably passes through the lifting ring and is symmetrically fixedly connected to the other side of the lower end of the upper stabilizing base. The inner diameter of the lifting ring is larger than the outer diameter of the lower load-bearing cable. During use, the magnetic guide column and the electromagnetic base are magnetically attracted and positioned. After the pressure detector measures the weight of the load lifted by the hook, the weight of the load is compared with the maximum lifting capacity of a pair of winches to achieve reasonable lifting without load. After the pressure detector is used, the electromagnetic base is turned off, and the magnetic guide column and the lifting ring fall under the action of the load, achieving close contact between the lower load-bearing cable and the lifting ring. There is no load connected to the force measuring end of the pressure detector. The lower load-bearing cable is used in conjunction with the hook for lifting, which protects the pressure detector.

[0015] Compared to existing technologies, the advantages of this application are:

[0016] (1) This solution adds multiple sets of winches to the top of the lifting arm. Each set of winches corresponds to a set of main ropes. The bottom of each set of main ropes is connected to a pressure detector located on the top of the hook via an upper load-bearing cable. The pressure detector is used to detect the weight of the load lifted by the hook, clearly indicating the weight of the goods. The weight of the load is compared with the maximum lifting capacity of the winch, so that a single main rope can be used alone or multiple main ropes can be used in combination to drive the load-bearing according to actual needs. This achieves reasonable lifting without overloading. The added winding roller, winding belt and magnetic collar structure prevents the unwound main rope from getting tangled at the bottom when only a single winch or a few winches are used for winding, which would affect normal lifting. This reduces the number of times the drive equipment is used and improves safety.

[0017] (2) The take-up roller has an air hole that communicates with its interior. The air pump's air outlet is connected to the air hole through a rotary joint. When only one winch is needed for driving and lifting, the other winch is closed. At this time, the electromagnetic plate on the guide plate is closed, and the magnetic collar is non-positioned with the guide plate. Then, the air pump is used to inflate the magnetic collar through the take-up belt. After the magnetic collar expands, it comes into close contact with the main rope. Finally, the take-up roller is driven to take up the main rope. During the rotation of the take-up roller, the main rope at the lower end and the main rope that is reserved and wound on the winch are wound up.

[0018] (3) The magnetic collar has a hollow ring structure with an expansion cavity inside. The outer end wall of the magnetic collar has a flexible layer to prevent deformation, and the inner end wall of the magnetic collar has an elastic layer. The inner ring of the magnetic collar that is close to the main rope has compression protrusions. After the magnetic collar is filled with gas, it compresses the elastic layer. The inner end of the magnetic collar is in close contact with the main rope. The addition of compression protrusions helps to improve the connection stability between the magnetic collar and the main rope. Thus, when the winding belt is wound up, the main rope can be driven upward and wound up together through the magnetic collar.

[0019] (4) By adding an air pump, a lower load-bearing cable and an electromagnetic base, the magnetic guide column and the electromagnetic base are magnetically positioned during use. After the pressure detector measures the weight of the load lifted by the hook, the weight of the load is compared with the maximum lifting capacity of a pair of winches, so that reasonable lifting can be carried out without load. After the pressure detector is used, the electromagnetic base is turned off, and the magnetic guide column and the lifting ring fall under the action of the load, so that the lower load-bearing cable and the lifting ring are in close contact. There is no load connected to the force measuring end of the pressure detector. The lower load-bearing cable is used in conjunction with the hook for lifting, which protects the pressure detector. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this application;

[0021] Figure 2 This is a schematic diagram of the structure at the junction of a pair of drive boxes and the main rope in this application;

[0022] Figure 3 This is a partial cross-sectional view of the junction of a pair of drive boxes and the main rope in this application;

[0023] Figure 4 This is a schematic diagram of the structure at the junction of the main rope and the take-up roller in this application;

[0024] Figure 5 This is a schematic diagram of the structure at the junction of the magnetic collar and the guide plate in this application;

[0025] Figure 6 This is a schematic diagram illustrating the state of the main rope being wound up using a take-up roller in this application.

[0026] Figure 7 This is a schematic diagram illustrating the change in the main rope winding method of this application, where winding is changed from being done by a winch to being done by a winding roller.

[0027] Figure 8 This is a partial cross-sectional view of the pressure detector in Embodiment 2 of this application during operation;

[0028] Figure 9 This is a schematic diagram of the external structure of the pressure detector in Embodiment 2 of this application when it is not in operation.

[0029] Explanation of the labels in the diagram:

[0030] 1. Lifting boom, 2. Drive box, 3. Main rope, 4. Upper load-bearing cable, 5. Upper stabilizer, 6. Lower stabilizer, 7. Hook, 8. Pressure detector, 9. Lifting ring, 10. Winch, 11. Guide plate, 12. Guide disc, 121. Electromagnetic plate, 13. Rewinding roller, 131. Air hole, 14. Rewinding belt, 15. Magnetic collar, 151. Magnetic plate, 16. Guide roller, 17. Air pump, 18. Lower load-bearing cable, 19. Electromagnetic seat, 20. Magnetic guide column. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] Example 1:

[0033] This application discloses a weight-controlled lifting device; please refer to [link / reference]. Figure 1 The system includes a lifting boom 1, with a pair of drive boxes 2 fixedly installed at the top of the boom 1. Each drive box 2 is equipped with a winch 10, and each winch 10 is wound with a main rope 3. The lower ends of the main ropes 3 are connected to an upper load-bearing cable 4, and the lower end of the upper load-bearing cable 4 is connected to an upper stabilizing seat 5. The lower end of the upper stabilizing seat 5 is connected to a pressure detector 8, and the force measuring end of the pressure detector 8 is connected to a hook 7. The top of the hook 7 is fixedly connected to a lower stabilizing seat 6, and multiple steel cables are distributed on the lower stabilizing seat 6. The top ends of the multiple steel cables are fixedly connected to the force measuring end of the pressure detector 8 through a lifting ring 9. The cooperation between the upper stabilizing seat 5 and the lower stabilizing seat 6 improves the overall lifting stability at the hook 7. The pressure detector 8 is added between the upper stabilizing seat 5 and the lower stabilizing seat 6 to detect the weight of the lifted object, so as to clearly know the weight of the goods and select whether to use a single main rope 3 or multiple main ropes 3 in combination for load bearing according to actual needs.

[0034] Please see Figure 1-2 A pair of drive boxes 2 are connected to guide plates 11 at their bottom ends. A pair of guide discs 12 are installed on the guide plates 11, and the guide plates 11 have through holes for the main rope 3 to pass through. The upper end of the main rope 3 passes through the through holes and the guide discs 12 in sequence and is wound around the winch 10. The opposite end walls of the pair of drive boxes 2 are provided with hollow cavities that are connected to the winch 10. Guide rollers 16 for guiding the main rope 3 are rotatably installed in the hollow cavities. Those skilled in the art can add two or more winches 10 at the top of the lifting arm 1. The multiple winches 10 can be distributed close to each other in a ring. The multiple winches 10 correspond to multiple main ropes 3, and the bottom ends of the multiple main ropes 3 are connected to the load-bearing cable 4. The bottom ends of the multiple main ropes 3 are close to each other to improve the stability of the lifting. The guide plates 11 have through holes for the main rope 3 to pass through, which improves the smoothness of the main rope 3's up and down movement.

[0035] Please see Figure 2-7Inside one of the drive boxes 2, there is also a take-up roller 13 located below the side of the winch 10. A take-up belt 14 is wound on the take-up roller 13. The lower end of the take-up belt 14 passes through the outside of the drive box 2 and is connected to a magnetic collar 15 that is movably sleeved on the main rope 3. The bottom end of the magnetic collar 15 is attached to the upper surface of the guide plate 12, and an electromagnetic plate 121 is embedded inside the guide plate 12. An air pump 17 connected to the inside of the take-up roller 13 is also installed on the drive box 2, and one end of the take-up belt 14 is connected to the inside of the take-up roller 13.

[0036] The bottom of the hollow cavity of the drive box 2, which houses the take-up roller 13, has a pre-reserved clearance with the bottom surface of the guide roller 16 to facilitate the guidance of the take-up belt 14 to the take-up roller 13. The take-up roller 13 has an air hole 131 communicating with its interior. The air pump 17's air inlet is connected to the air hole 131 via a rotary joint. When only one winch 10 is needed for lifting, the other winch 10 is closed. At this time, the electromagnetic plate 121 on the guide disc 12 is closed, and the magnetic collar 15 is non-positionally connected to the guide disc 12. The air pump 17 then inflates the magnetic collar 15 through the take-up belt 14. After the magnetic collar 15 expands, it comes into close contact with the main rope 3, finally driving the take-up roller 13 to wind up the belt. The take-up roller 13 rotates. During the process, the main rope 3 at the lower end and the main rope 3 pre-wound on the winch 10 are wound up. The winding roller 13 can be a low-power winding device. It does not bear weight during winding. First, another winch 10 can be used to wind up a small section of the main rope 3, and then the winding roller 13 can be used to wind up the main rope 3 connected to it. The addition of a non-load-bearing winding structure is to prevent the unwound main rope 3 from hanging at the bottom and easily getting tangled when only a single winch 10 or a few winches 10 are used for winding, which would affect the normal lifting. When multiple winches 10 and main rope 3 are provided in a one-to-one manner, the corresponding number of winding rollers 13 also need to be configured according to actual needs so that the winding rollers 13 can wind up the non-load-bearing main rope 3.

[0037] In this embodiment, the magnetic collar 15 has a hollow annular structure with an expansion cavity inside. The outer end wall of the magnetic collar 15 has a flexible layer to prevent deformation, and the inner end wall of the magnetic collar 15 has an elastic layer. The inner ring of the magnetic collar 15, which is close to the main rope 3, has compression protrusions. After the magnetic collar 15 is filled with gas, it compresses the elastic layer, and the inner end of the magnetic collar 15 is in close contact with the main rope 3. The addition of compression protrusions helps to improve the connection stability between the magnetic collar 15 and the main rope 3. Thus, when the winding belt 14 is wound up, the main rope 3 can be driven upward and wound up together through the magnetic collar 15.

[0038] Example 2;

[0039] The difference between this embodiment and embodiment 1 is that this embodiment adds an air pump 17, a lower supporting cable 18, and an electromagnetic base 19 to the structure of embodiment 1. The rest of the structure is the same as that of embodiment 1, as detailed below:

[0040] Please see Figure 8-9 The pressure detector 8 has an internal movable cavity. The top of the movable cavity is equipped with an electromagnetic base 19 connected to its force measuring end. The movable cavity is movably connected with a magnetic guide post 20 that is magnetically attracted to the electromagnetic base 19. The top of the lifting ring 9 is equipped with a steel pipe that extends into the movable cavity and is fixedly connected to the bottom of the magnetic guide post 20. The outer end wall of the magnetic guide post 20 is distributed with irregular strips. The inner wall of the movable cavity is provided with an irregular cavity that matches the irregular strips, thereby improving the stability of the connection between the magnetic guide post 20 and the movable cavity.

[0041] A lower load-bearing cable 18 is fixedly connected to one side of the bottom of the upper stable base 5. The other end of the lower load-bearing cable 18 passes through the lifting ring 9 and is symmetrically fixed to the other side of the lower end of the upper stable base 5. The inner diameter of the lifting ring 9 is larger than the outer diameter of the lower load-bearing cable 18. During use, the magnetic guide post 20 and the electromagnetic base 19 are magnetically attracted and positioned. After the pressure detector 8 measures the weight of the load lifted by the hook 7, the weight of the load is compared with the maximum lifting capacity of a pair of winches 10 to achieve reasonable lifting without load. After the pressure detector 8 is used, the electromagnetic base 19 is closed. The magnetic guide post 20 and the lifting ring 9 fall under the action of the load, achieving close contact between the lower load-bearing cable 18 and the lifting ring 9. There is no load connected to the force measuring end of the pressure detector 8. The lower load-bearing cable 18 is used in conjunction with the hook 7 for lifting, which protects the pressure detector 8.

[0042] The above description is merely a preferred embodiment of this application; however, the scope of protection of this application is not limited thereto; any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and its improved concept, should be covered within the scope of protection of this application.

Claims

1. A weight-controlled lifting device, comprising a lifting boom (1), characterized in that: A pair of drive boxes (2) are fixedly installed at the top of the lifting arm (1). A winch (10) is embedded in each of the drive boxes (2). A main rope (3) is wound around each of the winches (10). The lower ends of the main ropes (3) are connected to an upper load-bearing cable (4). The lower end of the upper load-bearing cable (4) is connected to an upper stabilizing seat (5). The lower end of the upper stabilizing seat (5) is connected to a pressure detector (8). The force measuring end of the pressure detector (8) is connected to a hook (7). A guide plate (11) is connected to the bottom of the drive boxes (2). A pair of guide discs (12) are installed on the guide plate (11). A through hole for the main rope (3) to pass through is opened on the guide plate (11). The upper end of the main rope (3) passes through the through hole and the guide disc (12) in sequence and is wound around the winch (10). Inside one of the drive boxes (2) is a take-up roller (13) located below the winch (10). A take-up belt (14) is wound on the take-up roller (13). The lower end of the take-up belt (14) passes through the outside of the drive box (2) and is connected to a magnetic collar (15) that is movably sleeved on the main rope (3). The bottom end of the magnetic collar (15) is attached to the upper surface of the guide plate (12), and an electromagnetic plate (121) is embedded inside the guide plate (12). An air pump (17) is also installed and connected to the inside of the take-up roller (13), and one end of the take-up belt (14) is connected to the inside of the take-up roller (13). The magnetic collar (15) has a hollow annular structure. An expansion cavity is provided inside the magnetic collar (15). A flexible layer to prevent deformation is provided on the outer end wall of the magnetic collar (15). An elastic layer is provided on the inner end wall of the magnetic collar (15). The air pump (17) is used to inflate the magnetic collar (15) through the take-up belt (14).

2. The weight-controlled lifting device according to claim 1, characterized in that: The top of the hook (7) is fixedly connected to a lower stabilizing base (6), and multiple steel cables are distributed on the lower stabilizing base (6). The tops of the multiple steel cables are fixedly connected to the force measuring end of the pressure detector (8) through a lifting ring (9).

3. The weight-controlled lifting device according to claim 1, characterized in that: Each pair of drive boxes (2) has a hollow cavity on its opposite end wall that is connected to the winch (10), and a guide roller (16) for guiding the main rope (3) is rotatably installed in the hollow cavity.

4. The weight-controlled lifting device according to claim 3, characterized in that: There is a clearance between the bottom of the hollow cavity of the drive box (2) on which the take-up roller (13) is installed and the bottom end face of the guide roller (16).

5. The weight-controlled lifting device according to claim 1, characterized in that: The take-up roller (13) has an air hole (131) that communicates with its interior, and the air outlet of the air pump (17) is connected to the air hole (131) through a rotary joint.

6. The weight-controlled lifting device according to claim 1, characterized in that: The magnetic collar (15) has compression protrusions distributed on the inner ring that is close to the main rope (3).

7. The weight-controlled lifting device according to claim 1, characterized in that: The pressure detector (8) has an internal movable cavity. The top of the movable cavity is provided with an electromagnetic base (19) connected to its force measuring end. The movable cavity is movably connected with a magnetic guide post (20) that is magnetically attracted to the electromagnetic base (19).

8. The weight-controlled lifting device according to claim 2, characterized in that: The top of the lifting ring (9) is provided with a steel pipe, which extends into the movable cavity and is fixedly connected to the bottom of the magnetic guide post (20). The outer end wall of the magnetic guide post (20) is distributed with irregular strips, and the inner wall of the movable cavity is provided with an irregular cavity that matches the irregular strips.

9. A weight-controlled lifting device according to claim 8, characterized in that: The lower support cable (18) is fixedly connected to one side of the bottom end of the upper stable base (5). The other end of the lower support cable (18) passes through the lifting ring (9) and is symmetrically fixedly connected to the other side of the lower end of the upper stable base (5). The inner diameter of the lifting ring (9) is larger than the outer diameter of the lower support cable (18).

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