Pneumatic balance crane based on movable pulley

Abstract

The invention relates to the technical field of balance cranes, and discloses a pneumatic balance crane based on a movable pulley, the pneumatic balance crane comprises a balance crane body, the balance crane body comprises a first shell and a second shell, the adjacent ends of the first shell and the second shell are fixedly connected, a first cavity is formed in the first shell, and a second cavity is formed in the second shell. A first cavity is formed in the first shell, a second cavity is formed in the second shell, the first cavity communicates with the second cavity, a second end cover is fixedly installed at the end, away from the second shell, of the first shell, a first end cover is fixedly installed at the end, away from the first shell, of the second shell, and a piston rod is movably installed in the second cavity. According to the pneumatic balance crane, the piston rod in the shell of the pneumatic balance crane moves to push the piston rod to achieve movement of the pulley, then the lifting steel cable is lifted and lowered to achieve lifting and lowering of an object, the control valve is manually operated to adjust pressure applied to the piston rod, and then the effect of a lifting machine is achieved during working.

Description

Technical Field

[0001] The invention relates to the technical field of balancing cranes, in particular to a pneumatic balancing crane based on a movable pulley. Background Art

[0002] With the advancement of industrial technology and the improvement of human living standards, the demand for ergonomic handling systems in the industrial production field is growing. Such systems can effectively reduce the burden of manual handling, improve work efficiency, and reduce labor intensity. They are an indispensable part of modern production lines. Pneumatic balance cranes, as the core of ergonomic handling systems, are responsible for improving power and control functions. Their performance directly affects the efficiency and safety of the entire system.

[0003] Although pneumatic balance cranes play an important role in industrial production, their high manufacturing costs and technical complexity limit their widespread application in small and medium-sized enterprises. This is especially critical for small workshops and R&D studios that want to improve production efficiency and reduce costs. Summary of the invention

[0004] The object of the present invention is to provide a pneumatic balance crane based on a movable pulley to solve the problems raised in the above background technology.

[0005] Technical Solution

[0006] The present invention provides the following technical solution: a pneumatic balance crane based on a movable pulley, comprising a balance crane body, the balance crane body comprising a first shell and a second shell, the adjacent ends of the first shell and the second shell are fixedly connected, a first cavity is provided inside the first shell, a second cavity is provided inside the second shell, the first cavity and the second cavity are communicated with each other, a second end cover is fixedly installed at one end of the first shell away from the second shell, a first end cover is fixedly installed at one end of the second shell away from the first shell, a piston rod is movably installed in the second cavity, and the first cavity and the second cavity are connected to each other. A connecting cover is provided between the cavities, the piston rod passes through the connecting cover and extends into the first cavity, a sealing ring is provided inside the connecting cover, a first chain link connector is fixedly installed on the outer side of the connecting cover, and a second chain link connector is fixedly installed on the outer side of the second end cover, a first pulley and a second pulley are movably installed in the first cavity, the first pulley and the second pulley are respectively located at the two ends of the first cavity, a steel cable is movably connected to the outer sides of the first pulley and the second pulley, one end of the steel cable passes through the first shell and extends outward, and a hook is fixedly installed on the protruding end of the steel cable.

[0007] Preferably, an air intake connecting valve is provided in the connecting cover, a first connecting valve is provided on the first end cover, a second connecting valve is provided on the second end cover, the air intake connecting valve and the first connecting valve are both connected to the second cavity, and the second connecting valve is connected to the first cavity.

[0008] Preferably, a first guide ring and a piston sealing ring are respectively provided on the outer wall of the piston rod located in the second cavity, and the first guide ring and the piston sealing ring are both slidably connected to the inner wall of the second cavity. A second guide ring is provided on the outer wall of the piston rod located in the first cavity, and the second guide ring is slidably connected to the inner wall of the first cavity.

[0009] Preferably, the piston rod is located at one end of the first cavity and fixedly connected to the first pulley, and a steel cable end is provided at the end of the steel cable, and the steel cable end is fixedly connected to the inner wall of the second end cover facing the first cavity.

[0010] Preferably, the first pulley, the second pulley and the steel cable form a pulley block.

[0011] Preferably, the air inlet connecting valve is connected to an air pressure source.

[0012] Beneficial Effects

[0013] Compared with the prior art, the present invention provides a pneumatic balance crane based on a movable pulley, which has the following beneficial effects:

[0014] 1. The pneumatic balance crane based on the movable pulley moves the piston rod in the pneumatic balance crane shell, pushes the piston rod to realize the movement of the pulley, and then raises and lowers the lifting steel cable to realize the lifting and lowering of the object. The manual control valve is used to adjust the pressure applied to the piston rod, thereby achieving the effect of a hoist during operation.

[0015] 2. The pneumatic balance crane based on movable pulley will have a much lower production cost than other pneumatic balance cranes with current technologies, while retaining safety and ease of operation. One part of it is composed of a pneumatic piston and a piston rod. The movable pulley in its movable module moves toward or away from the fixed pulley to raise and lower the steel cable carrying the load. The distance that the overall hoist can move depends on the ratio of the movable distance of the mobile module and the number of strands of the wire rope.

[0016] 3. The pneumatic balance crane based on the movable pulley is a light-duty lifting crane powered by compressed air, with a lifting action having a balanced floating function. The pulley block and cylinder of the crane are combined into the same unit, which greatly reduces the manufacturing and maintenance costs of the crane without affecting its functional operation and use, and enhances the safety of use in explosion-proof occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0018] Figure 1 It is a front cross-sectional view of the overall structure of the present invention;

[0019] Figure 2 This is the appearance diagram of the overall structure of the present invention;

[0020] Figure 3 It is a front view of the overall structure of the present invention;

[0021] Figure 4 It is a side view of the overall structure of the present invention.

[0022] In the figure: 1. Balance crane body; 2. First shell; 3. Second shell; 4. First cavity; 5. Second cavity; 6. Connecting cover; 7. First end cover; 8. Second end cover; 9. Piston rod; 10. First guide ring; 11. Piston sealing ring; 12. First connecting valve; 13. Inlet connecting valve; 14. First chain link connector; 15. Second guide ring; 16. First pulley; 17. Steel cable; 18. Hook; 19. Second pulley; 20. End of steel cable; 21. Second chain link connector; 22. Second connecting valve; 23. Sealing ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example:

[0025] See also Figure 1-Figure 4The present invention provides a technical solution: a pneumatic balance crane based on a movable pulley, comprising a balance crane body 1, the balance crane body 1 includes a first shell 2 and a second shell 3, the adjacent ends of the first shell 2 and the second shell 3 are fixedly connected, a first cavity 4 is provided inside the first shell 2, a second cavity 5 is provided inside the second shell 3, the first cavity 4 and the second cavity 5 are communicated with each other, a second end cover 8 is fixedly installed at one end of the first shell 2 away from the second shell 3, a first end cover 7 is fixedly installed at one end of the second shell 3 away from the first shell 2, a piston rod 9 is movably installed in the second cavity 5, a connecting cover 6 is provided between the first cavity 4 and the second cavity 5, the piston rod 9 passes through the connecting cover 6 and extends to the first cavity In the body 4, a sealing ring 23 is provided inside the connecting cover 6, a first chain link connector 14 is fixedly installed on the outer side of the connecting cover 6, and a second chain link connector 21 is fixedly installed on the outer side of the second end cover 8. The first chain link connector 14 and the second chain link connector 21 are suitable for being installed on a guide rail or a hanging point to support the balancing hanging equipment in the workplace. A first pulley 16 and a second pulley 19 are movably installed in the first cavity 4, respectively. The first pulley 16 and the second pulley 19 are respectively located at the two ends of the first cavity 4, and a steel cable 17 is movably connected to the outer sides of the first pulley 16 and the second pulley 19. One end of the steel cable 17 passes through the first shell 2 and extends outward, and a hook 18 is fixedly installed on the protruding end of the steel cable 17.

[0026] The two ends of the balance crane body are closed by a first end cover 7 and a second end cover 8.

[0027] In this embodiment, an air intake connecting valve 13 is provided in the connecting cover 6, a first connecting valve 12 is provided on the first end cover 7, and a second connecting valve 22 is provided on the second end cover 8. The air intake connecting valve 13 and the first connecting valve 12 are both connected to the second cavity 5, and the second connecting valve 22 is connected to the first cavity 4.

[0028] In this embodiment, a first guide ring 10 and a piston sealing ring 11 are respectively provided on the outer wall of the piston rod 9 in the second cavity 5, and the first guide ring 10 and the piston sealing ring 11 are both slidably connected to the inner wall of the second cavity 5. A second guide ring 15 is provided on the outer wall of the piston rod 9 in the first cavity 4, and the second guide ring 15 is slidably connected to the inner wall of the first cavity 4.

[0029] In this embodiment, the piston rod 9 is located at one end of the first cavity 4 and fixedly connected to the first pulley 16. A steel cable end 20 is provided at the end of the steel cable 17. The steel cable end 20 is fixedly connected to the inner wall of the second end cover 8 facing the first cavity 4.

[0030] In this embodiment, the first pulley 16, the second pulley 19 and the steel cable 17 form a pulley block, and the steel cable 17 is wound around the first pulley 16 and the second pulley 19 and rotates about an axis that is substantially aligned.

[0031] In this embodiment, the air intake connecting valve 13 is connected to an air pressure source.

[0032] When the piston rod 9 moves along the central axis in the second cavity 5 , toward or away from the first end cover 7 , the steel cable 17 extends out of or retracts from the first cavity 4 .

[0033] The structure of the first pulley 16 and the second pulley 19 allows the pulley-carrying steel cable 17 to be wound and extended from the balance crane. The length of the first cavity 4 is determined by the number of turns of the steel cable 17 wound around the first pulley 16 and the second pulley 19.

[0034] An air intake connecting valve 13 is provided in the connecting cover 6, and the air intake valve is connected to a compressed air source. The compressed air enters or is discharged, thereby pushing the piston rod 9 in the second cavity 5 to move toward one end or the other end.

[0035] The first connecting valve 12 on the first end cover 7 and the second connecting valve 22 on the second end cover 8 provide gas exchange between the second cavity 5 and the first cavity 4 and the outside, and reduce noise.

[0036] The first cavity 4 is connected to the atmosphere, while the second cavity 5 is a closed cavity formed by a sealing ring 23 and a first end cover 7 .

[0037] The piston rod 9 is installed in the second cavity 5 and is sealed in the cavity. The connection is provided with a spaced sealing ring 23 to seal the chamber and prevent the gas from communicating with the left and right sides of the second cavity 5 through the piston rod 9. The piston rod 9 is connected to the first pulley 16 in the first cavity 4 so that the first pulley 16 can move synchronously with the movement of the piston rod 9.

[0038] The air inlet connecting valve 13 can be replaced with a servo control valve to achieve full-stroke floating balance of a single weight; by adding an UP / DN control valve, a large stroke can be achieved by pressing a button, and floating balance within a certain range can be achieved at any position.

[0039] The working principle of this embodiment is as follows: by controlling the air inlet connecting valve 13, the compressed gas of the air source is injected into the second cavity 5 of the balancing crane, and the piston rod 9 can move axially in the second cavity 5 to extend and retract the steel cable 17, and to lift, lower or maintain the load (not shown) on the hook 18 connected to the head end of the steel cable 17 at the desired position. Adjusting the pressure on both sides of the piston rod 9 can play the role of lifting and lowering the load.

[0040] In addition, due to the compressibility of the gas in the second cavity 5 and the relationship between the movable pulley group and the force amplification factor, by applying a very small downward or upward operating force on the weight by hand, the workpiece can be moved downward or upward. After letting go, the weight can return to its original position, thereby achieving a balanced floating effect of the workpiece. This "balanced floating" operating effect will bring very significant benefits in labor-saving transportation, especially in high-precision positioning work scenarios.

Claims

1. A pneumatic balance crane based on a movable pulley, comprising a balance crane body (1), wherein the balance crane body (1) comprises a first shell (2) and a second shell (3), wherein adjacent ends of the first shell (2) and the second shell (3) are fixedly connected, characterized in that: A first cavity (4) is provided inside the first shell (2), and a second cavity (5) is provided inside the second shell (3). The first cavity (4) and the second cavity (5) are communicated with each other. A second end cover (8) is fixedly installed on the end of the first shell (2) away from the second shell (3), and a first end cover (7) is fixedly installed on the end of the second shell (3) away from the first shell (2). A piston rod (9) is movably installed in the second cavity (5). A connecting cover (6) is provided between the first cavity (4) and the second cavity (5). The piston rod (9) passes through the connecting cover (6) and extends into the first cavity (4). The connecting cover (6) is A sealing ring (23) is arranged inside, a first chain link connector (14) is fixedly installed on the outer side of the connecting cover (6), a second chain link connector (21) is fixedly installed on the outer side of the second end cover (8), a first pulley (16) and a second pulley (19) are movably installed in the first cavity (4), the first pulley (16) and the second pulley (19) are respectively located at the two ends of the first cavity (4), a steel cable (17) is movably connected to the outer side of the first pulley (16) and the second pulley (19), one end of the steel cable (17) passes through the first shell (2) and extends outward, and a hook (18) is fixedly installed on the protruding end of the steel cable (17).

2. The pneumatic balance crane based on a movable pulley according to claim 1, characterized in that: An air intake connecting valve (13) is arranged in the connecting cover (6), a first connecting valve (12) is arranged on the first end cover (7), and a second connecting valve (22) is arranged on the second end cover (8); the air intake connecting valve (13) and the first connecting valve (12) are both connected to the second cavity (5), and the second connecting valve (22) is connected to the first cavity (4).

3. The pneumatic balance crane based on movable pulley according to claim 1, characterized in that: The outer wall of the piston rod (9) in the second cavity (5) is respectively provided with a first guide ring (10) and a piston sealing ring (11), and the first guide ring (10) and the piston sealing ring (11) are both slidably connected to the inner wall of the second cavity (5). The outer wall of the piston rod (9) in the first cavity (4) is provided with a second guide ring (15), and the second guide ring (15) is slidably connected to the inner wall of the first cavity (4).

4. The pneumatic balance crane based on movable pulley according to claim 1, characterized in that: The piston rod (9) is located at one end of the first cavity (4) and is fixedly connected to the first pulley (16); the end of the steel cable (17) is provided with a steel cable end (20), and the steel cable end (20) is fixedly connected to the inner wall of the second end cover (8) facing the first cavity (4).

5. The pneumatic balance crane based on movable pulley according to claim 1, characterized in that: The first pulley (16), the second pulley (19) and the steel cable (17) form a pulley block.

6. The pneumatic balance crane based on movable pulley according to claim 1, characterized in that: The air intake connecting valve (13) is connected to an air pressure source.

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