Explosion-proof chain hoist with adjustable speed

Abstract

The utility model relates to the field of hoisting equipment, and discloses a speed-adjustable explosion-proof chain hoist which comprises a first explosion-proof main body, a second explosion-proof main body and a chain wheel box, an explosion-proof motor is fixedly mounted on the outer side of the first explosion-proof main body, a mounting groove is formed in the inner side of the second explosion-proof main body, a hydraulic cylinder is fixedly mounted in the mounting groove, and the hydraulic cylinder is fixedly connected with the chain wheel box. The tail end of a telescopic rod of the hydraulic cylinder is fixedly connected with the inner side of the first anti-explosion body, and a second bearing hole and a first bearing hole are formed in the center of the inner side of the first anti-explosion body and the center of the inner side of the second anti-explosion body correspondingly. By converting the size of the chain wheel and combining the power adjustment of the motor, the effect of changing the chain contraction and extension speed is achieved, meanwhile, the smaller chain wheel is converted, the motor load can be effectively reduced, on one hand, the rotating speed of the motor is guaranteed, and on the other hand, the motor can be prevented from being shortened in service life and even damaged due to large load. The chain wheel can be converted into a larger chain wheel so as to achieve higher speed and efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifting equipment, and in particular relates to an explosion-proof chain hoist with adjustable speed. Background Art

[0002] In many industrial environments, such as chemical, petroleum, and coal mining, where flammable and explosive gases or dust are present, explosion-proof lifting equipment is required to lift heavy objects. Chain hoists are widely used due to their compact structure and wide lifting capacity range. However, existing explosion-proof chain hoists have shortcomings in speed regulation. In some operating scenarios, the hoist's lifting speed needs to be flexibly adjusted according to the load, lifting accuracy requirements, and work urgency.

[0003] However, traditional explosion-proof chain hoists with a single speed or a fixed speed adjustment range cannot accurately control the lifting process when precise operation is required, and cannot meet diverse work needs. In addition, the traditional speed regulation method is to increase or decrease the motor power to achieve the speed regulation effect. When lifting heavier objects, it may cause the motor to be overloaded and slow down, affecting the motor life or even causing the motor to burn out. In some special cases, it may even cause safety hazards due to inappropriate speed.

[0004] For this reason, the inventor has introduced a novel explosion-proof chain hoist with adjustable speed to solve the above-mentioned problems and defects. Utility Model Content

[0005] In order to solve the technical problem that the traditional speed regulation method mentioned above increases or decreases the motor power to achieve the speed regulation effect, which may cause the motor to be overloaded and slow down when lifting heavy objects, affecting the motor life or even causing the motor to burn out, and even causing safety hazards due to inappropriate speed in some special cases, the basic concept of the technical solution adopted by the utility model is:

[0006] A speed-adjustable explosion-proof chain hoist comprises a first explosion-proof body, a second explosion-proof body and a sprocket box, an explosion-proof motor being fixedly mounted on the outside of the first explosion-proof body, an installation groove being provided on the inside of the second explosion-proof body, a hydraulic cylinder being fixedly mounted inside the installation groove, the end of the telescopic rod of the hydraulic cylinder being fixedly connected to the inside of the first explosion-proof body, and a second bearing hole and a first bearing hole being provided at the inner center position of both the first explosion-proof body and the second explosion-proof body, a first bearing being fixedly mounted inside the first bearing hole, and a shaft being fixedly sleeved on the inner ring of the first bearing.

[0007] As a preferred embodiment of the present invention, the middle position of the shaft is fixedly sleeved with the first sprocket, the second sprocket and the third sprocket in sequence, and the end of the shaft close to the first sprocket is provided with a first side push wheel, and the end of the shaft close to the third sprocket is provided with a second side push wheel.

[0008] As a preferred embodiment of the present invention, sprocket grooves are provided on opposite sides of the first side push wheel and the second side push wheel, and the inner diameters of the sprocket grooves inside the first side push wheel and the second side push wheel correspond to the outer diameters of the second sprocket and the third sprocket respectively, and are movably connected to the two.

[0009] As a preferred embodiment of the present invention, an axial hole is opened at the center position of the first side push wheel and the second side push wheel, the axial hole corresponds to the shaft rod and is movably connected thereto, and a rotating turntable is installed at the outer center position of the first side push wheel and the second side push wheel.

[0010] As a preferred embodiment of the present invention, a spring and a second bearing are sleeved and installed on the rod body of the shaft rod, the spring is installed between the second side push wheel and the second bearing, the second bearing corresponds to the second bearing hole and is fixedly sleeved therewith.

[0011] As a preferred embodiment of the present invention, a hook is movably installed at the lower end of the sprocket box, and a chain is installed inside the sprocket box. The upper end of the chain corresponds to the first sprocket, the second sprocket and the third sprocket and engages with them.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The utility model changes the distance between the force arm and the shaft by changing the size of the sprocket, and combines the power adjustment of the motor to change the speed of chain contraction and extension. The adjustment range of the combination of the two can be increased several times. At the same time, when the motor load is large, it is converted to a smaller sprocket, which can effectively reduce the motor load. On the one hand, it ensures the speed of the motor, and on the other hand, it can prevent the life of the motor from being shortened or even damaged due to the large load. When lifting lighter objects and speeding up at the same time, it can be converted to a larger sprocket in exchange for faster speed and efficiency.

[0014] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In the attached figure:

[0016] Figure 1 It is a three-dimensional overall main view schematic diagram of an explosion-proof chain hoist with adjustable speed;

[0017] Figure 2This is a schematic diagram of the explosion of the speed-changing mechanism of an explosion-proof chain hoist with adjustable speed;

[0018] Figure 3 This is a schematic front view of the working state of the speed change mechanism of an explosion-proof chain hoist with adjustable speed;

[0019] Figure 4 A schematic side view of the working state of the speed change mechanism of an explosion-proof chain hoist with adjustable speed;

[0020] Figure 5 The present invention is a schematic front view of a side push wheel of an explosion-proof chain hoist with adjustable speed.

[0021] In the figure: 1. first explosion-proof body; 2. explosion-proof motor; 3. hydraulic cylinder; 4. chain; 5. sprocket box; 6. hook; 7. first bearing hole; 8. mounting slot; 9. first bearing; 10. first side push wheel; 11. shaft; 12. first sprocket; 13. second sprocket; 14. third sprocket; 15. second side push wheel; 16. second explosion-proof body; 17. spring; 18. second bearing; 19. second bearing hole; 20. sprocket slot; 21. shaft hole; 22. rotating turntable. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0023] like Figures 1 to 5 As shown, an explosion-proof chain hoist with adjustable speed includes a first explosion-proof body 1, a second explosion-proof body 16 and a sprocket box 5. An explosion-proof motor 2 is fixedly installed on the outside of the first explosion-proof body 1, and a mounting groove 8 is opened on the inside of the second explosion-proof body 16. A hydraulic cylinder 3 is fixedly installed inside the mounting groove 8. The end of the telescopic rod of the hydraulic cylinder 3 is fixedly connected to the inner side of the first explosion-proof body 1, and a second bearing hole 19 and a first bearing hole 7 are opened at the inner center position of the first explosion-proof body 1 and the second explosion-proof body 16. A first bearing 9 is fixedly installed inside the first bearing hole 7, and the inner ring of the first bearing 9 is fixedly sleeved with a shaft 11.

[0024] In this setting, the utility model changes the distance between the force arm and the shaft 11 by changing the size of the sprocket, and combines the power adjustment of the motor to change the speed of contraction and extension of the chain 4. The combination of the two will increase the speed adjustment range by several times. At the same time, when the motor load is large, it can be converted to a smaller sprocket, which can effectively reduce the motor load. On the one hand, it ensures the motor speed, and on the other hand, it can prevent the motor from being shortened or even damaged due to the large load. When lifting lighter objects and speeding up at the same time, it can be converted to a larger sprocket in exchange for faster speed and efficiency.

[0025] like Figures 1 to 5 As shown, in a specific embodiment, the middle position of the shaft 11 is fixedly sleeved with the first sprocket 12, the second sprocket 13 and the third sprocket 14 in sequence, and the end of the shaft 11 close to the first sprocket 12 is provided with a first side thrust wheel 10, and the end of the shaft 11 close to the third sprocket 14 is provided with a second side thrust wheel 15; sprocket grooves 20 are provided on the opposite sides of the first side thrust wheel 10 and the second side thrust wheel 15, and the inner diameters of the sprocket grooves 20 inside the first side thrust wheel 10 and the second side thrust wheel 15 correspond to the outer diameters of the second sprocket 13 and the third sprocket 14 respectively, and are movably sleeved with the two.

[0026] In this setting, when the equipment is working, the hydraulic cylinder 3 causes the distance between the first explosion-proof body 1 and the second explosion-proof body 16 to shrink, which generates pressure on the first side push wheel 10, and the first side push wheel 10 pushes the chain 4 to move to the larger sprocket, the load decreases and the speed of the chain 4 increases, wherein the side push wheel is designed in the shape of a helical gear, which can prevent the chain 4 from slipping when it detaches from the original sprocket.

[0027] like Figures 1 to 5 As shown, in a specific embodiment, an axial hole 21 is opened at the center position of the first side thrust wheel 10 and the second side thrust wheel 15, the axial hole 21 corresponds to the shaft rod 11 and is movably connected thereto, and a rotating turntable 22 is installed at the outer center position of the first side thrust wheel 10 and the second side thrust wheel 15.

[0028] In this arrangement, when the hydraulic cylinder extends, the first side push wheel 10 retracts, and the second side push wheel 15 is subjected to the rebound force of the spring 17 to push the chain 4 to move to the smaller sprocket, thereby achieving the effect of switching the sprockets.

[0029] like Figures 1 to 5As shown, in a specific embodiment, a spring 17 and a second bearing 18 are sleeved and installed on the rod body of the shaft 11, and the spring 17 is installed between the second side push wheel 15 and the second bearing 18. The second bearing 18 corresponds to the second bearing hole 19 and is fixedly sleeved therewith; a hook 6 is movably installed at the lower end of the sprocket box 5, and a chain 4 is installed inside the sprocket box 5, and the upper end of the chain 4 corresponds to the first sprocket 12, the second sprocket 13 and the third sprocket 14 and is engaged with them.

[0030] In this setting, combined with the power and speed regulation of the motor, the adjustment range of the motor power and speed is increased several times compared to the single adjustment of the motor power and speed, and it can also prevent the beneficial effect of a large motor load.

[0031] The implementation principle of the speed-adjustable explosion-proof chain hoist of this embodiment is as follows:

[0032] The utility model changes the distance between the force arm and the shaft 11 by changing the size of the sprocket, and combines the power adjustment of the motor to change the speed of contraction and extension of the chain 4. The combination of the two increases the speed adjustment range by several times. At the same time, when the motor load is large, the sprocket is converted to a smaller one, which can effectively reduce the motor load. On the one hand, it ensures the speed of the motor, and on the other hand, it can prevent the life of the motor from being shortened or even damaged due to the large load. When lifting lighter objects and speeding up at the same time, the sprocket can be converted to a larger one in exchange for faster speed and efficiency.

[0033] When the device is working, the hydraulic cylinder 3 causes the distance between the first explosion-proof body 1 and the second explosion-proof body 16 to shrink, generating pressure on the first side push wheel 10, and the first side push wheel 10 pushes the chain 4 to move to the larger sprocket, the load becomes smaller and the speed of the chain 4 increases, wherein the side push wheel is designed in the shape of a helical gear, which can prevent the chain 4 from slipping when it detaches from the original sprocket; when the hydraulic cylinder extends, the first side push wheel 10 retracts, and the second side push wheel 15 is pushed by the rebound force of the spring 17 to move the chain 4 to the smaller sprocket, thereby achieving the effect of converting the sprocket. Combined with the power and speed adjustment of the motor, the adjustment range is increased several times compared to a single adjustment of the motor power and speed, and it can also prevent the beneficial effect of a large motor load.

Claims

1. An explosion-proof chain hoist with adjustable speed, comprising a first explosion-proof body (1), a second explosion-proof body (16) and a sprocket box (5), characterized in that: An explosion-proof motor (2) is fixedly installed on the outer side of the first explosion-proof body (1), a mounting groove (8) is provided on the inner side of the second explosion-proof body (16), a hydraulic cylinder (3) is fixedly installed inside the mounting groove (8), the end of the telescopic rod of the hydraulic cylinder (3) is fixedly connected to the inner side of the first explosion-proof body (1), and a second bearing hole (19) and a first bearing hole (7) are provided at the inner center position of the first explosion-proof body (1) and the second explosion-proof body (16), a first bearing (9) is fixedly installed inside the first bearing hole (7), and the inner ring of the first bearing (9) is fixedly sleeved with a shaft (11).

2. The explosion-proof chain hoist with adjustable speed according to claim 1, characterized in that: The middle position of the shaft (11) is fixedly sleeved with a first sprocket (12), a second sprocket (13) and a third sprocket (14) in sequence, and a first side push wheel (10) is provided at one end of the shaft (11) close to the first sprocket (12), and a second side push wheel (15) is provided at one end of the shaft (11) close to the third sprocket (14).

3. The explosion-proof chain hoist with adjustable speed according to claim 2, characterized in that: A sprocket groove (20) is provided on the opposite side of the first side push wheel (10) and the second side push wheel (15), and the inner diameters of the sprocket grooves (20) inside the first side push wheel (10) and the second side push wheel (15) respectively correspond to the outer diameters of the second sprocket (13) and the third sprocket (14), and are movably connected to the two.

4. The explosion-proof chain hoist with adjustable speed according to claim 3, characterized in that: The center positions of the first side push wheel (10) and the second side push wheel (15) are both provided with an axial hole (21), the axial hole (21) corresponds to the shaft rod (11) and is movably connected thereto, and a rotating turntable (22) is installed at the outer center positions of the first side push wheel (10) and the second side push wheel (15).

5. The explosion-proof chain hoist with adjustable speed according to claim 4, characterized in that: A spring (17) and a second bearing (18) are sleeved and mounted on the rod body of the shaft rod (11); the spring (17) is mounted between the second side push wheel (15) and the second bearing (18); the second bearing (18) corresponds to the second bearing hole (19) and is fixedly sleeved therewith.

6. The explosion-proof chain hoist with adjustable speed according to claim 1, characterized in that: A hook (6) is movably mounted on the lower end of the sprocket box (5), and a chain (4) is mounted inside the sprocket box (5). The upper end of the chain (4) corresponds to and engages with the first sprocket (12), the second sprocket (13) and the third sprocket (14).

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