A kind of sling tensioning mechanism capable of increasing force

Abstract

The present invention discloses a sling tensioning mechanism capable of increasing force, comprising a fixed pulley part, a movable pulley part and a sling; wherein a hook, a hook shaft, two upper brackets, a first pulley shaft and a first pulley, a third pulley shaft and a third pulley and a first locking mechanism constitute the fixed pulley part; a second pulley shaft and a second pulley, two lower brackets and a second locking mechanism constitute the movable pulley part; the movable pulley part can move toward the fixed pulley part; the sling passes through the movable pulley part and is wound around the fixed pulley part. The present invention can realize a certain multiple of force increase; and the operation is simple, and the length of the sling can be adjusted and tightened by only one tightening action.

Description

[Technical field]

[0001] The invention relates to a sling tensioning mechanism capable of increasing force, in particular to a sling tensioning mechanism for fixing goods, and belongs to the technical field of mechanical engineering. [Background technology]

[0002] Large cargoes on cars, ships and airplanes are mostly fixed with slings. The slings need to be tightened. The mechanism is mostly a manual ratchet mechanism, which can increase force, has a simple structure and low cost. However, the tightening process is cumbersome and is generally divided into a belt length adjustment process and a tightening process. Moreover, the tightening process requires a cyclic manual process to tighten the sling. [Summary of the invention]

[0003] In order to solve the shortcomings of the existing sling tensioning mechanism, the present invention provides a sling tensioning mechanism capable of increasing force, which can increase force, work reliably, be easy to operate, and tighten quickly.

[0004] The present invention is a sling tensioning mechanism capable of increasing force, and its specific technical scheme is as follows:

[0005] The sling tensioning mechanism includes three parts, a fixed pulley part, a movable pulley part and a sling. Among them, the hook, the hook shaft, two upper brackets, the first pulley shaft and the first pulley, the third pulley shaft and the third pulley and the first locking mechanism constitute the fixed pulley part. The two upper brackets connect the hook shaft, the first pulley shaft and the third pulley shaft into one body, and the arrangement of the hook shaft, the first pulley shaft and the third pulley shaft is convenient for the sling to pass through; the locking mechanism is fixed on the upper bracket and located near the third pulley, and its position is convenient for the sling to pass through and to apply tension; the function of the fixed pulley part is to connect with the fixed part on the cargo or the vehicle through the hook, and to limit the position of the movable pulley. The first locking mechanism is composed of a locker body, an eccentric wheel, a spring and a pin shaft. The eccentric wheel can rotate around the pin shaft. The spring presses the eccentric wheel on the sling passing through the first locking mechanism, and presses the sling on the locker body.

[0006] The second pulley shaft and the second pulley, two lower brackets and the second locking mechanism constitute the movable pulley part. The two lower brackets connect the second pulley shaft and the pin shaft into one; the second locking mechanism has the same structure as the first locking mechanism and is located below the second pulley; the movable pulley part can move toward the fixed pulley part.

[0007] The sling passes through the second locking mechanism of the movable pulley part, is wound around the first pulley of the fixed pulley part, passes around the second pulley of the movable pulley part through the first pulley, then passes around the third pulley of the fixed pulley part, and passes through the first locking mechanism.

[0008] The function of the locking mechanism is to allow the sling to be pulled in one direction. When the sling is pulled in this direction, the eccentric wheel of the locking mechanism acted by the spring is loosened. When the sling moves in the opposite direction, the eccentric wheel of the locking mechanism presses the sling to prevent it from moving in the opposite direction.

[0009] A sling tensioning mechanism capable of increasing force, when working, the fixed pulley part is fixed by a hook, one end of the sling is connected to the connecting part of the corresponding fixed object or cargo, and then the end of the sling passing through the first locking mechanism (hereinafter referred to as the movable end of the sling) is pulled, and the sling passes through the second locking mechanism of the movable pulley part, bypasses the pulley block, and passes through the first locking mechanism until the sling between the fixed end of the sling (the end connected to the fixed object or cargo) and the second locking mechanism is straightened, at this time, continue to pull the movable end of the sling, the movable pulley part will approach the movable pulley part, at this time, the second locking mechanism locks the sling, and then the tension of the second locking mechanism on the sling is the tension of the movable end of the sling multiplied by the amplification factor of the pulley block. For example, the force amplification factor of the pulley block in Example 1 of the present invention is 3.

[0010] The present invention can obtain different magnifications by designing different numbers of pulley blocks.

[0011] Advantages and effects of the force-enhancing sling tensioning mechanism of the present invention:

[0012] 1. It can realize the force increase of a certain multiple.

[0013] 2. The operation is simple, and the length of the sling can be adjusted and tightened by just one action.

Brief Description of the Drawings

[0014] Figure 1a , b are structural principle diagrams of the sling tensioning mechanism according to embodiment 1 of the present invention.

[0015] Figure 2 for Figure 1b Middle AA section view.

[0016] Figure 3 for Figure 2 Middle BB cross-section.

[0017] Figure 4 for Figure 2 Middle CC section.

[0018] Figure 5 for Figure 1a Middle DD section view.

[0019] Figure 6a , b are structural principle diagrams of the sling tensioning mechanism of embodiment 2 of the present invention.

[0020] Figure 7 for Figure 6bMiddle AA section view.

[0021] Figure 8 for Figure 7 Middle BB cross-section.

[0022] Fig. 9 for Figure 7 Middle CC section.

[0023] Fig.10 for Figure 7 Middle DD section view.

[0024] The symbols in the figure are explained as follows:

[0025] 1-Hook 2-Hook shaft 3-Upper bracket 4-First pulley shaft 5-First pulley 6-Suspenders 7-First locking mechanism 8-Second pulley 9-Second pulley shaft 10-Lower bracket 11- Second locking mechanism 12-Third pulley 13-Third pulley shaft 14-Lock housing 15-Pin 16-Spring 17-Eccentric wheel 18-Screw 19-Fourth pulley 20-Fourth pulley shaft 21-Fifth pulley 22-Fifth pulley shaft [Specific implementation method]

[0026] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] Example 1

[0028] As shown in Figure 1- Figure 5 As shown, one embodiment of the present invention is a force-enhancing sling tensioning mechanism, which is divided into three parts: a fixed pulley part, a movable pulley part and a sling.

[0029] like Figure 2 The fixed pulley part includes a hook 1, a hook shaft 2, two upper brackets 3, a first pulley shaft 4 and a first pulley 5, a third pulley shaft 13 and a third pulley 12, and a first locking mechanism 7. Two identical upper brackets 3 connect the hook shaft 2, the first pulley shaft 4 and the third pulley shaft 13 into one body, and the arrangement of the hook shaft, the first pulley shaft and the third pulley shaft is convenient for the sling to pass through. The first locking mechanism 7 is fixed between the two upper brackets 3 and located below the third pulley 12 by a pin shaft 15 and a screw 18, which is convenient for the sling to pass through and for applying tension;

[0030] like Figure 3 The first locking mechanism 7 is composed of a locking body 14, an eccentric wheel 17, a spring 16 and a pin 15. The first locking mechanism 7 is fastened to the upper bracket 3 by screws. The eccentric wheel 17 can rotate around the pin 15. The spring 16 presses the eccentric wheel 17 on the sling 6 passing through the first locking mechanism, and presses the sling 6 on the locking body 14. When the sling 6 moves along the direction of the first locking mechanism 7 that causes the eccentric wheel 17 to lift, it can pass through the first locking mechanism 7 smoothly. When the sling 6 has a tendency to move along the direction of the first locking mechanism 7 that causes the eccentric wheel 17 to be pressed, the first locking mechanism 7 locks the sling 6.

[0031] like Figure 4The movable pulley part includes a second pulley shaft 9, a second pulley 8, two lower brackets 10 with the same structure, and a second locking mechanism 11. The second locking mechanism 11 has the same structure as the first locking mechanism 7. The second locking mechanism 11 is fastened between the two lower brackets 10 by screws 18 (such as Figure 5 ).

[0032] The sling 6 passes through the second locking mechanism 11, and then passes around the first pulley 5, the second pulley 8 and the third pulley 12 in sequence. After passing through the first locking mechanism 7, the initial distance between the fixed pulleys and the movable pulleys can be set according to the specific situation.

[0033] When in use, the hook 1 of the fixed pulley part is fixed, the fixed end of the sling 6 (the lower end shown in the figure) is also fixed, and the movable end of the sling 6, that is, the end passing through the first locking mechanism 7, is pulled until the sling 6 is tightened, and the movable end of the sling 6 is continued to be pulled, and the second locking mechanism 11 locks the sling 6, and then the second locking mechanism 11 will give the sling passing therethrough a tension that is 3 times the tension of the movable end of the sling. The force is set as needed, and then the movable end of the sling is loosened, and the first locking mechanism 7 locks the sling passing therethrough, and the sling tensioning mechanism maintains a tension that is 3 times the tension of the movable end of the sling.

[0034] Example 2

[0035] Figure 6- Fig.10 As shown, one embodiment of the present invention is a force-enhancing sling tensioning mechanism, which is divided into three parts: a fixed pulley part, a movable pulley part and a sling.

[0036] like Figure 7 , Fig. 9 The fixed pulley part includes a hook 1, a hook shaft 2, two upper brackets 3, a first pulley shaft 4 and a first pulley 5, a third pulley shaft 13 and a third pulley 12, a fifth pulley shaft 22 and a fifth pulley 21, and a first locking mechanism 7. The two identical upper brackets 3 are connected into one body through the hook shaft 2 and the first pulley shaft 4, the third pulley shaft 13 and the fifth pulley shaft 22, and the first pulley shaft, the third pulley shaft and the fifth pulley shaft are arranged as the three vertices of an isosceles triangle; the first locking mechanism 7 is fixed between the two upper brackets 3 and is located below the fifth pulley 21 through a pin shaft 15 and a screw 18;

[0037] like Figure 8The first locking mechanism 7 is composed of a locking device housing 14, a pin 15, a spring 16 and an eccentric wheel 17. The first locking mechanism 7 is fastened to the upper bracket 3 by screws. The eccentric wheel 17 can rotate around the pin 15. The spring 16 presses the eccentric wheel 17 on the sling 6 passing through the first locking mechanism, and presses the sling 6 on the locking device body 14. When the sling 6 moves in the direction in which the first locking mechanism 7 can lift the eccentric wheel 17, it can smoothly pass through the first locking mechanism 7. When the sling 6 has a tendency to move in the direction in which the first locking mechanism 7 can press the eccentric wheel 17, the first locking mechanism 7 locks the sling.

[0038] The movable pulley part includes a second pulley shaft 9 and a second pulley 8 , a fourth pulley shaft 20 and a fourth pulley 19 , two lower brackets 10 with the same structure, and a second locking mechanism 11 .

[0039] The second locking mechanism 11 has the same structure as the first locking mechanism 7. The second locking mechanism 11 is fastened between the two lower brackets 10 by screws 18 (such as Fig.10 ).

[0040] The sling 6 passes through the second locking mechanism 11, then passes around the first pulley 5, the second pulley 8, the third pulley 12, the fourth pulley 19 and the fifth pulley 21 in sequence, and then passes out of the first locking mechanism 7. The initial distances between the fixed pulleys and the movable pulleys can be set according to the specific situation.

[0041] When in use, the hook 1 of the fixed pulley part is fixed, the fixed end of the sling 6 (the lower end shown in the figure) is also fixed, and the movable end of the sling 6, that is, the end passing through the first locking mechanism 7, is pulled until the sling 6 is tightened, and the movable end of the sling 6 is continued to be pulled, and the second locking mechanism 11 locks the sling 6, and then the second locking mechanism 11 will give the sling passing therethrough a tension that is 5 times the tension of the movable end of the sling. The tension of the movable end of the sling is set as needed. Then the movable end of the sling is loosened, and the first locking mechanism 7 locks the sling passing therethrough, and the sling tensioning mechanism maintains a tension that is 5 times the tension of the movable end of the sling.

Claims

1. A sling tensioning mechanism capable of increasing force, characterized in that: The sling tensioning mechanism comprises three parts, a fixed pulley part, a movable pulley part and a sling; wherein, the hook, the hook shaft, the two upper brackets, the first pulley shaft and the first pulley, the third pulley shaft and the third pulley and the first locking mechanism constitute the fixed pulley part, the two upper brackets connect the hook shaft, the first pulley shaft and the third pulley shaft into one body, and the arrangement of the hook shaft, the first pulley shaft and the third pulley shaft is convenient for the sling to pass through; the locking mechanism is fixed on the upper bracket and is located near the third pulley, and its position is convenient for the sling to pass through and to apply tension; the fixed pulley part is connected to the fixed part on the cargo or the vehicle or ship through the hook, and defines the position of the movable pulley; the first locking mechanism is composed of a locker body, an eccentric wheel, a spring and a pin shaft, the eccentric wheel can rotate around the pin shaft, and the spring presses the eccentric wheel on the sling passing through the first locking mechanism, and presses the sling on the locker body; The second pulley shaft, the second pulley, the two lower brackets and the second locking mechanism constitute the movable pulley part; the two lower brackets connect the second pulley shaft and the pin shaft into one; the second locking mechanism has the same structure as the first locking mechanism and is located below the second pulley; the movable pulley part can move toward the fixed pulley part; The sling passes through the second locking mechanism of the movable pulley part, is wound around the first pulley of the fixed pulley part, passes through the second pulley of the movable pulley part through the first pulley, then passes through the third pulley of the fixed pulley part, and passes through the first locking mechanism, which is located at the movable end of the sling.

2. A method for increasing force of a tensioning mechanism according to claim 1, characterized in that: A force-enhancing sling tensioning mechanism comprises three parts, a fixed pulley part, a movable pulley part and a sling, wherein the fixed pulley part is fixed by a hook, one end of the sling is connected to the connecting part of the corresponding fixed object or cargo, and then one end of the sling passing through the first locking mechanism, i.e., the movable end of the sling, is pulled, and the sling passes through the second locking mechanism of the movable pulley part, bypasses the pulley block, and passes through the first locking mechanism until the sling between the fixed end of the sling, i.e., the end connected to the fixed object or cargo and the second locking mechanism is straightened; at this time, the movable end of the sling continues to be pulled, and the movable pulley part will approach the movable pulley part; at this time, the second locking mechanism locks the sling; then, the pulling force of the second locking mechanism on the sling is the pulling force of the movable end of the sling multiplied by the magnification of the pulley block.

3. A force amplification method according to claim 2, characterized in that: By adjusting the number of pulley sets, different magnifications can be obtained.

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