Double-rod lifting appliance

Abstract

The utility model discloses a double-rod lifting appliance, which belongs to the technical field of lifting appliances and comprises a transverse frame, a gear set and a driving source of the gear set are arranged in the middle of the transverse frame, and two supporting rods are coaxially connected to one side of a driving gear and one side of a first driven gear respectively. Lifting mechanisms used for lifting the supporting rods are arranged on the two sides of the gear set correspondingly. The distance between the two hooks can be adjusted by arranging the two rotatable supporting rods, and the distance between the two hooks can be adjusted by connecting the lifting ropes into the hooks, so that on one hand, objects of different specifications can be conveniently lifted, and on the other hand, the distance between the hooks can be adjusted; and the situation that the lifting hook droops too long and shakes when a heavy object is lifted is avoided, and the lifting stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifting slings, in particular to a double-rod lifting sling. Background Art

[0002] A lifting sling is a tool or device for lifting heavy objects. It is mainly used to connect heavy objects to lifting equipment such as cranes and hoists for lifting operations. The Chinese patent publication number CN205802765U discloses a crane balance beam sling, which includes a balance beam. The left and right parts of the upper side of the balance beam are respectively provided with an upper lifting lug A and a lower lifting lug B, the upper end of the upper lifting lug A is connected to a load-bearing chain A, the upper end of the upper lifting lug B is connected to a load-bearing chain B, and the upper ends of the load-bearing chains A and B are both connected to a lifting ring. The left and right parts of the lower side of the balance beam are both connected to three lower lifting lugs, the lower ends of the lower lifting lugs are connected to a balancing device, and the lower end of the balancing device is connected to a sling. A glass protective cover is provided in the middle of the front of the balance beam, a balancing instrument is provided inside the glass protective cover, and a horizontal pointer is provided in the middle of the balancing instrument. The utility model has the advantages of high accuracy, convenient adjustment, convenient and quick use, and comprehensive functions.

[0003] The problems existing in the prior art are: the lengths and positions of the two load-bearing chains in the above-mentioned slings are fixed, the distance between the lifting ring and the balance beam cannot be adjusted, the shaking of the balance beam cannot be adjusted during the lifting of heavy objects, and the stability needs to be further improved. Summary of the invention

[0004] In view of the problems existing in the prior art, the utility model provides a double-rod lifting sling, which has the advantages of stable lifting and easy adjustment. It solves the problems that the lengths of the two load-bearing chains in the existing slings are fixed as well as the positions of the settings, the distance between the lifting ring and the balance beam cannot be adjusted, and the shaking of the balance beam cannot be adjusted during the lifting of heavy objects.

[0005] The utility model is implemented as follows: a double-rod lifting sling comprises a cross frame, a gear group and a driving source of the gear group are arranged in the middle of the cross frame, the gear group comprises a driving gear and a first driven gear, the driving gear is meshed and connected with the first driven gear, two support rods are coaxially connected to one side of the driving gear and the first driven gear, lifting mechanisms for lifting the support rods are arranged on both sides of the gear group, hooks are arranged at the lower ends of the two support rods, two lifting ropes are fixedly installed in the middle of the cross frame through a mounting seat, and the bottoms of the two lifting ropes are fixedly connected with hooks.

[0006] As a preferred embodiment of the utility model, the driving source is a motor, the motor is fixedly installed on one side of the cross frame, the driving source is coaxially connected to the driving gear, and the driving gear and the first driven gear are both rotatably installed in the cross frame.

[0007] As a preferred embodiment of the present invention, the lifting mechanism includes a first fixed seat and a second fixed seat, the first fixed seat and the second fixed seat are fixedly installed on the upper surface of the horizontal frame, the first fixed seat is rotatably connected to the first pulley, and the second fixed seat is rotatably connected to the second pulley and the second driven gear.

[0008] As a preferred embodiment of the utility model, the two second driven gears are respectively meshed and connected with the driving gear and the first driven gear, and a pull rope is fixedly connected inside the second pulley. The other end of the pull rope passes around the first pulley in turn, passes through the cross frame, and is fixedly connected to the support rod.

[0009] As a preferred embodiment of the present invention, one end of the two support rods away from the gear set is fixedly connected to a mounting block, and the two hooks are respectively fixedly connected to the two mounting blocks.

[0010] As a preferred embodiment of the utility model, a clamping slot and a movable slot are respectively provided at both ends of the hook, the upper end of the movable slot is rotatably connected to a limiting rod, the lower end is fixedly connected to a spring, the upper end of the spring is fixedly connected to the limiting rod, and the end of the limiting rod away from the spring is clamped into the clamping slot.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] The utility model can adjust the distance between the two hooks by arranging two rotatable support rods, and can adjust the spacing between the two hooks by connecting the lifting rope to the hooks. On the one hand, it is convenient to lift objects of different specifications, and on the other hand, it can adjust the distance between the hooks to avoid the hooks from sagging too long, which causes shaking when lifting heavy objects, thereby improving the stability of lifting.

[0013] The utility model can adjust the angles of two support rods at the same time by arranging a motor and a gear set, thereby improving the adjustment efficiency.

[0014] The utility model is provided with a lifting mechanism, and can correspondingly reel in or loosen the pull rope while adjusting the angle of the support rod, thereby improving the strength of the end of the support rod away from the gear set and avoiding the danger caused by the breakage of the support rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 For the utility model Figure 1A magnified view of the structure at center;

[0017] Figure 3 It is a partial cross-sectional three-dimensional structural schematic diagram of the utility model;

[0018] Figure 4 For the utility model Figure 1 Enlarged view of the structure at point B in the middle.

[0019] In the figure: 1, horizontal frame; 2, motor; 3, gear set; 4, support rod; 401, mounting block; 5, hook; 6, lifting mechanism; 7, lifting rope; 8, hook; 9, mounting seat; 301, driving gear; 302, first driven gear; 601, first fixed seat; 602, second fixed seat; 603, first pulley; 604, second pulley; 605, second driven gear; 606, pull rope; 501, movable slot; 502, spring; 503, limit rod. DETAILED DESCRIPTION

[0020] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0021] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0022] like Figures 1 to 4 As shown, a double-rod lifting sling provided by an embodiment of the utility model includes a cross frame 1, a gear group 3 and a driving source of the gear group 3 are arranged in the middle of the cross frame 1, the gear group 3 includes a driving gear 301 and a first driven gear 302, the driving gear 301 is meshed and connected with the first driven gear 302, and two support rods 4 are coaxially connected to one side of the driving gear 301 and the first driven gear 302, and lifting mechanisms 6 for lifting the support rods 4 are respectively arranged on both sides of the gear group 3, and hooks 5 are arranged at the lower ends of the two support rods 4. Two lifting ropes 7 are fixedly installed in the middle of the cross frame 1 through a mounting seat 9, and the bottoms of the two lifting ropes 7 are fixedly connected with hooks 8.

[0023] The driving source is a motor 2 , which is fixedly mounted on one side of the horizontal frame 1 . The driving source is coaxially connected to a driving gear 301 , and both the driving gear 301 and the first driven gear 302 are rotatably mounted in the horizontal frame 1 .

[0024] In the present application, when the motor 2 is started, the driving gear 301 is driven to rotate, and the driving gear 301 drives the first driven gear 302 to rotate, so that the two support rods 4 rotate in opposite directions with the driving gear 301 axis and the driven gear axis as the center, presenting a gradually opening or closing shape.

[0025] Furthermore, the lifting mechanism 6 includes a first fixed seat 601 and a second fixed seat 602, and the first fixed seat 601 and the second fixed seat 602 are fixedly installed on the upper surface of the horizontal frame 1. The first fixed seat 601 is rotatably connected with a first pulley 603, and the second fixed seat 602 is rotatably connected with a second pulley 604 and a second driven gear 605. The two second driven gears 605 are respectively meshed and connected with the driving gear 301 and the first driven gear 302. A pull rope 606 is fixedly connected inside the second pulley 604. The other end of the pull rope 606 passes around the first pulley 603 in turn, passes through the horizontal frame 1, and is fixedly connected to the support rod 4. The ends of the two support rods 4 away from the gear group 3 are fixedly connected with the mounting block 401, and the two hooks 5 are respectively fixedly connected to the two mounting blocks 401.

[0026] In the present application, the two second driven gears 605 rotate synchronously with the driving gear 301 and the first driven gear 302, thereby driving the second pulley 604 to rotate. During the opening of the two struts 4, the second pulley 604 reels the pull rope 606 to keep the pull rope 606 taut. During the closing of the two struts 4, the second pulley 604 releases the pull rope 606 and stretches the lower end to move downward with the strut 4. Through this arrangement, the strength of the end of the strut 4 away from the gear group 3 can be improved, thereby avoiding the danger of the strut 4 breaking.

[0027] Furthermore, a card slot and a movable slot 501 are respectively provided at both ends of the hook 5. The upper end of the movable slot 501 is rotatably connected to a limiting rod 503, and the lower end is fixedly connected to a spring 502. The upper end of the spring 502 is fixedly connected to the limiting rod 503, and the end of the limiting rod 503 away from the spring 502 is carded into the card slot.

[0028] In the present application, by pressing one end of the limit rod 503 downward, the spring 502 contracts, and the limit rod 503 rotates downward away from one end of the spring 502, and then breaks away from the connection with the slot, so that an opening is formed at this end to facilitate the insertion of the sling 7. The limit rod 503 is then released, so that it is reset under the elastic force of the spring 502 and abuts against the inner wall of the top of the slot, thereby preventing the sling 7 from falling out.

[0029] By setting the hook 5 so that the lifting rope 7 is connected to the lower end of the support rod 4, the distance between the two hooks 8 can be adjusted. On the one hand, it is convenient to lift objects of different specifications. On the other hand, the distance between the hook 8 and the hook 5 can be adjusted to prevent the hook 8 from drooping too long and causing shaking when lifting heavy objects, thereby improving the stability of lifting.

[0030] The working principle of this utility model:

[0031] Connect the two lifting ropes 7 to the two hooks 5 respectively, and then connect the two hooks 8 to the object to be lifted, start the motor 2 to drive the driving gear 301 to rotate, and the driving gear 301 drives the first driven gear 302 to rotate, so that the two support rods 4 rotate in opposite directions with the driving gear 301 axis and the driven gear axis as the center, presenting a gradually opening shape, and the second pulley 604 reels the pull rope 606 to keep the pull rope 606 taut, and makes the hook 8 gradually approach the hook 5, so as to ensure the stability of the object during the lifting process.

[0032] To sum up: this double-pole lifting sling, by setting two rotatable struts 4, can adjust the distance between the two hooks 5, and by connecting the lifting rope 7 to the hook 5, can adjust the spacing between the two hooks 8. On the one hand, it is convenient to lift objects of different specifications, and on the other hand, it can adjust the distance between the hook 8 and the hook 5 to avoid the hook 8 drooping too long, which causes shaking when lifting heavy objects, thereby improving the lifting stability. By setting the motor 2 and the gear set 3, the angles of the two struts 4 can be adjusted at the same time to improve the adjustment efficiency. By setting the lifting mechanism 6, the pull rope 606 can be wound or loosened correspondingly while the angle of the strut 4 is adjusted, thereby improving the strength of the end of the strut 4 away from the gear set 3 and avoiding the danger caused by the breakage of the strut 4.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-rod lifting sling, comprising a cross frame (1), characterized in that: A gear set (3) and a driving source of the gear set (3) are arranged in the middle of the cross frame (1); the gear set (3) comprises a driving gear (301) and a first driven gear (302); the driving gear (301) is meshingly connected with the first driven gear (302); two support rods (4) are coaxially connected to one side of the driving gear (301) and the first driven gear (302); lifting mechanisms (6) for lifting the support rods (4) are arranged on both sides of the gear set (3); hooks (5) are arranged at the lower ends of the two support rods (4); two lifting ropes (7) are fixedly installed in the middle of the cross frame (1) through a mounting seat (9); the bottoms of the two lifting ropes (7) are fixedly connected with lifting hooks (8).

2. A double-rod lifting sling as claimed in claim 1, characterized in that: The driving source is a motor (2), the motor (2) is fixedly mounted on one side of the cross frame (1), the driving source is coaxially connected to the driving gear (301), and the driving gear (301) and the first driven gear (302) are both rotatably mounted in the cross frame (1).

3. A double-rod lifting sling according to claim 1, characterized in that: The lifting mechanism (6) comprises a first fixed seat (601) and a second fixed seat (602); the first fixed seat (601) and the second fixed seat (602) are fixedly mounted on the upper surface of the horizontal frame (1); a first pulley (603) is rotatably connected inside the first fixed seat (601); and a second pulley (604) and a second driven gear (605) are rotatably connected inside the second fixed seat (602).

4. A double-rod lifting sling as claimed in claim 3, characterized in that: The two second driven gears (605) are respectively meshed and connected with the driving gear (301) and the first driven gear (302); a pull rope (606) is fixedly connected inside the second pulley (604); the other end of the pull rope (606) passes through the first pulley (603) in sequence, passes through the cross frame (1), and is fixedly connected to the support rod (4).

5. A double-rod lifting sling as claimed in claim 1, characterized in that: One end of the two support rods (4) away from the gear set (3) is fixedly connected to a mounting block (401), and the two hooks (5) are respectively fixedly connected to the two mounting blocks (401).

6. A double-rod lifting sling as claimed in claim 1, characterized in that: The hook (5) has a clamping slot and a movable slot (501) at both ends, respectively; the upper end of the movable slot (501) is rotatably connected to a limiting rod (503) and the lower end is fixedly connected to a spring (502); the upper end of the spring (502) is fixedly connected to the limiting rod (503), and one end of the limiting rod (503) away from the spring (502) is clamped into the clamping slot.

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