Stacked material hoisting clamp

Abstract

The hoisting clamp for the stacked materials comprises a connecting cross beam, clamp arms are hinged to the two ends of the connecting cross beam, L-shaped clamp feet are arranged at the bottommost portions of the clamp arms, and connecting rods are hinged to the inner sides of the clamp arms. The top end of the guide rod penetrates into an inner hole of a guide sleeve, the top end of the guide sleeve is hinged to a hanging ring, lug plates are fixedly arranged on the two sides of the bottom of the guide sleeve, and a pair of arc-shaped opening and closing hooks are hinged to the lug plates. And a fixed cone and a movable cone are sleeved on the guide rod between the guide sleeve and the connecting cross beam. The guide rod linearly moves in the guide sleeve to drive the connecting rod to move, the connecting rod drives the clamp arms to move, and opening and closing of the clamp arms are achieved. The connecting rod drives the clamp arm to move and form linkage with the sliding supporting leg, when the lifting appliance is in contact with the ground, the sliding supporting leg firstly falls to the ground to form buffering with the bottom surface, direct contact between the lifting appliance clamp arm and the ground is avoided, opening and closing resistance of the lifting appliance clamp arm is reduced, and therefore opening and closing actions can be stably achieved.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting fixtures, in particular to a hoisting fixture for stacked materials. Background Art

[0002] With the rapid development of the sling industry, there are more and more types of clamps. Among them, the stacked material lifting clamp is an indispensable type of clamp. The stacked material lifting clamp clamps the material by pulling the clamp arm with a wire rope and supports the bottom of the material. However, due to the high clamp legs, it is easy to cause unstable lifting. In addition, it is also easy to be affected by the friction between the bottom of the clamp leg of the clamp arm and the ground and the short opening and closing force arm, which affects the overall opening and closing state of the clamp. Summary of the invention

[0003] In order to solve the technical problems mentioned in the background technology, the present invention provides a hoisting fixture for stacked materials.

[0004] The present invention adopts the following technical solution: a stacked material hoisting fixture, comprising a connecting beam;

[0005] Clamp arms are hinged at both ends of the connecting beam, an L-shaped clamp foot is arranged at the bottom of the clamp arm, and a connecting rod is hinged at the inner side of the clamp arm;

[0006] A guide rod is inserted into the middle hole of the connecting beam;

[0007] A connecting ear is fixedly arranged at the bottom of the guide rod, and two ends of the connecting ear are hingedly connected to the other end of the connecting rod;

[0008] The top end of the guide rod penetrates into the inner hole of the guide sleeve and can slide axially in the guide sleeve;

[0009] The top of the guide sleeve is hinged with a lifting ring, and ear plates are fixed on both sides of the bottom of the guide sleeve;

[0010] A pair of arc-shaped opening and closing hooks are hinged on the ear plate;

[0011] The guide rod is located between the guide sleeve and the connecting crossbeam and is provided with a set vertebral body and a moving vertebral body;

[0012] The bottom surface of the fixed vertebral body is provided with a first contact surface for hooking with a pair of arc-shaped opening and closing hooks;

[0013] The bottom surface of the moving vertebral body is provided with a second contact surface for hooking with a pair of arc-shaped opening and closing hooks;

[0014] The first contact surface and the second contact surface have equal widths;

[0015] The fixed vertebral body is fixedly connected to the guide rod;

[0016] The movable vertebra is slidably connected to the guide rod, and a sliding distance is left between the movable vertebra and the fixed vertebra;

[0017] When the guide rod slides to the upper limit contact point in the guide sleeve, the bottom hook bodies of a pair of arc-shaped opening and closing hooks just hook the second contact surface of the moving vertebral body;

[0018] When the guide rod slides to the limit contact point at the bottom of the guide sleeve, a pair of arc-shaped opening and closing hooks completely move upward to the top of the fixed vertebral body;

[0019] An upper limit pin and a lower limit pin are provided below the clamp arm;

[0020] The upper limit pin and the lower limit pin are movably connected to the sliding legs.

[0021] Furthermore, the sliding leg is provided with a vertical sliding groove and an L-shaped sliding groove for connecting with the upper limit pin and the lower limit pin; the bottom edge of the sliding leg is located below the L-shaped clamp foot, and its bottom is an arc-shaped sliding contact surface.

[0022] Compared with the prior art, the advantages of the present invention are as follows: the stacked material lifting fixture designed by the present invention drives the connecting rod to move through the linear movement of the guide rod in the guide sleeve, and the connecting rod drives the clamp arm to move to realize the opening and closing of the clamp arm. The clamp arm is used to clamp the side of the stacked material. When the guide rod moves upward, the end of the connecting rod hinged to the connecting ear moves upward, and the connecting rod pulls the clamp arm inward to close the two clamp arms, which is convenient for clamping the material and makes the lifting process more stable. The connecting rod drives the clamp arm to move and forms a linkage with the sliding leg. When contacting the ground, the sliding leg first falls to the ground and forms a buffer with the bottom surface, avoiding direct contact between the clamp arm of the hoist and the ground, reducing the opening and closing resistance of the clamp arm of the hoist, and thus being able to smoothly realize the opening and closing action. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The state diagram of the material stacking fixture of the present invention is shown in FIG. Figure 1 ;

[0024] Figure 2 The state diagram of the material stacking fixture of the present invention is shown in FIG. Figure 2 ;

[0025] Figure 3 The state diagram of the material stacking fixture of the present invention is shown in FIG. Figure 3 .

[0026] in:

[0027] 1-connecting crossbeam, 2-clamp arm, 3-L-shaped clamp foot, 4-connecting rod, 5-guide rod, 6-connecting ear, 7-guide sleeve, 8-lifting ring, 9-ear plate, 10-arc-shaped opening and closing hook, 11-fixed vertebra, 12-moving vertebra, 13-first contact surface, 14-second contact surface, 15-upper limit pin, 16-lower limit pin, 17-sliding leg, 18-vertical slide groove, 19-L-shaped slide groove, 20-arc-shaped sliding contact surface. DETAILED DESCRIPTION

[0028] In order to facilitate those skilled in the art to understand the technical solution of the present invention, further description will be given below with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0029] In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may be implemented without these specific details. In addition, in the following description, descriptions of known structures and techniques are omitted to avoid unnecessary confusion of concepts of the present invention.

[0030] like Figure 1-3 As shown, the stacked material lifting fixture involved in this embodiment includes a connecting crossbeam 1, and clamp arms 2 are hinged at both ends of the connecting crossbeam 1. L-shaped clamp feet 3 are set at the bottom of the clamp arms 2, and the L-shaped clamp feet 3 are used to clamp the two sides of the material. A connecting rod 4 is hinged on the inner side of the clamp arm 2, and a guide rod 5 is inserted into the middle hole of the connecting crossbeam 1. A connecting ear 6 is fixed at the bottom of the guide rod 5. The two ends of the connecting ear 6 are hinged to the other end of the connecting rod 4. The top of the guide rod 5 penetrates the inner hole of the guide sleeve 7 and can slide axially in the guide sleeve 7. The top of the guide sleeve 7 is hinged to a lifting ring 8, and ear plates 9 are fixed on both sides of the bottom of the guide sleeve 7. A pair of arc-shaped opening and closing hooks 10 are hinged on the ear plates 9.

[0031] In this embodiment, the guide rod 5 is provided with a set vertebra 11 and a movable vertebra 12 between the guide sleeve 7 and the connecting crossbeam 1, and the bottom surface of the fixed vertebra 11 is provided with a first contact surface 13 for hanging with a pair of arc-shaped opening and closing hooks 10. The bottom surface of the movable vertebra 12 is provided with a second contact surface 14 for hanging with a pair of arc-shaped opening and closing hooks 10, and the width of the first contact surface 13 and the second contact surface 14 are equal. The fixed vertebra 11 is fixedly connected to the guide rod 5. The movable vertebra 12 is slidably connected with the guide rod 5, and a sliding distance is left between the fixed vertebra 11. When the guide rod 5 slides to the upper limit contact point in the guide sleeve 7, the bottom end hooks of the pair of arc-shaped opening and closing hooks 10 just hang on the second contact surface 14 of the movable vertebra 12. When the guide rod 5 slides to the bottom limit contact point in the guide sleeve 7, the pair of arc-shaped opening and closing hooks 10 completely move up to the top of the fixed vertebra 11, and an upper limit pin 15 and a lower limit pin 16 are provided below the clamp arm 2. The upper limit pin 15 and the lower limit pin 16 are movably connected to the sliding legs 17 .

[0032] In this embodiment, the sliding leg 17 is provided with a vertical slide groove 18 and an L-shaped slide groove 19 for connecting with the upper limit pin 15 and the lower limit pin 16. The bottom edge of the sliding leg 17 is located below the L-shaped clamp foot 3, and its bottom is an arc-shaped sliding contact surface 20.

[0033] The entire operation process of this embodiment is as follows:

[0034] like Figure 1 As shown, in the initial state, a pair of arc-shaped opening and closing hooks 10 respectively hang on the first contact surfaces 13 on both sides of the fixed cone 11. At this time, the pair of clamp arms 2 are in a natural drooping state, and the upper limit pin 15 and the lower limit pin 16 are respectively at the top of the vertical slide groove 18 and the L-shaped slide groove 19 of the sliding leg 17. The pair of sliding legs 17 are in a vertical hanging state, and the overall sling is in an unloaded opening state.

[0035] like Figure 2 As shown, prepare for lifting, and lift the lifting ring 8 as the lifting point. When the lifting device descends to the ground, a pair of sliding legs 17 first contact the ground. Under the action of the lifting device's own weight, the upper limit pin 15 and the lower limit pin 16 slide to the bottom of the vertical slide groove 18 and the L-shaped slide groove 19 of the sliding leg 17 respectively. As the lifting device continues to descend, the lifting ring 8 and the guide sleeve 7 drive the arc-shaped opening and closing hook 10 to slide vertically downward along the guide rod 5 until the hook head of the arc-shaped opening and closing hook 10 is on the second contact surface 14 below the moving cone 12. At this time, the lifting device is ready for lifting.

[0036] like Figure 3 As shown, the lifting ring 8 is lifted vertically upward again, and a pair of arc-shaped opening and closing hooks 10 are respectively hooked on the second contact surfaces 14 on both sides of the moving cone 12. The moving cone 12 will slide upward along the axis of the guide rod 5 along the lifting ring 8, the guide sleeve 7 and the pair of arc-shaped opening and closing hooks 10 until the upper surface of the moving cone 12 contacts the lower surface of the fixed cone 11. The arc-shaped opening and closing hooks 10 continue to rise due to the lifting force and separate from the moving cone 12, and the moving cone 1 falls back to its original position due to its own gravity. Since the widths of the first contact surface 13 and the second contact surface 14 are equal, the arc-shaped opening and closing hooks 10 will not hook on the first contact surface 13 of the fixed cone 11, but will continue to move upward. At this time, the lifting ring 8 and the guide sleeve 7 drive the guide rod 5 and the fixed cone 11 to move upward together, and the pair of connecting rods 4 are tightened inwardly by the upward traction force, forming an angle with the connecting beam 1, and the pair of clamp arms 2 are tightened inwardly at the bottom by the pulling force of the pair of connecting rods 4 to clamp the material, and a pair of sliding legs 17 are affected by their own gravity and ground friction, with the bottom arc-shaped sliding contact surface as the fulcrum, and the L-shaped slide groove 19 is the trajectory and swings inwardly with the tightening action of the clamp arm 2, thereby assisting the sling to support the bottom surface of the hoisted object and lift the material as a whole.

[0037] When the material is hoisted to the placement point, the guide rod 5 drives the pair of arc-shaped opening and closing hooks 10 to move downward, and is hooked on the first contact surface 13 of the fixed vertebral body 11 again to return to the initial state.

[0038] In summary, the stacked material lifting fixture designed by the present invention drives the connecting rod 4 to move through the linear motion of the guide rod 5 in the guide sleeve 7, and the connecting rod 4 drives the clamp arm 2 to move to realize the opening and closing of the clamp arm 2. The clamp arm 2 is used to clamp the side of the stacked material. When the guide rod 5 moves upward, the end of the connecting rod 4 hinged with the connecting ear 6 moves upward, and the connecting rod 4 pulls the clamp arm 2 inward to close the two clamp arms 2, which is convenient for clamping the material and makes the lifting process more stable. The connecting rod 4 drives the clamp arm 2 to move and forms a linkage with the sliding leg 17. When contacting the ground, the sliding leg 17 first falls to the ground and forms a buffer with the bottom surface, avoiding direct contact between the hanger clamp arm 2 and the ground, reducing the opening and closing resistance of the hanger clamp arm 2, so that the opening and closing action can be smoothly realized.

[0039] The above embodiments are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A stacked material lifting fixture, characterized in that: It comprises a connecting beam (1); Clamp arms (2) are hingedly connected at both ends of the connecting crossbeam (1), an L-shaped clamp foot (3) is arranged at the bottom of the clamp arm (2), and a connecting rod (4) is hingedly connected inside the clamp arm (2); A guide rod (5) is inserted into the middle hole of the connecting crossbeam (1); A connecting ear (6) is fixedly provided at the bottom of the guide rod (5), and two ends of the connecting ear (6) are hingedly connected to the other end of the connecting rod (4); The top end of the guide rod (5) penetrates into the inner hole of the guide sleeve (7) and can slide axially in the guide sleeve (7); The top of the guide sleeve (7) is hingedly connected to a lifting ring (8), and ear plates (9) are fixedly arranged on both sides of the bottom of the guide sleeve (7); A pair of arc-shaped opening and closing hooks (10) are hingedly connected to the ear plate (9); A set vertebra (11) and a movable vertebra (12) are sleeved on the guide rod (5) and located between the guide sleeve (7) and the connecting crossbeam (1); The bottom surface of the fixed vertebral body (11) is provided with a first contact surface (13) for being hooked with a pair of arc-shaped opening and closing hooks (10); The bottom surface of the moving vertebral body (12) is provided with a second contact surface (14) for hooking with a pair of arc-shaped opening and closing hooks (10); The first contact surface (13) and the second contact surface (14) have equal widths; The fixed vertebral body (11) is fixedly connected to the guide rod (5); The movable vertebra (12) is slidably connected to the guide rod (5) and has a sliding distance between it and the fixed vertebra (11); When the guide rod (5) slides to the upper limit contact point in the guide sleeve (7), the bottom hook bodies of the pair of arc-shaped opening and closing hooks (10) just hook the second contact surface (14) of the moving vertebral body (12); When the guide rod (5) slides to the bottom limit contact point inside the guide sleeve (7), the pair of arc-shaped opening and closing hooks (10) completely move upward to the top of the fixed vertebral body (11); An upper limit pin (15) and a lower limit pin (16) are arranged below the clamp arm (2); The upper limit pin (15) and the lower limit pin (16) are movably connected to the sliding support leg (17).

2. The stacked material lifting fixture according to claim 1, characterized in that: The sliding leg (17) is provided with a vertical sliding groove (18) and an L-shaped sliding groove (19) for connecting with the upper limit pin (15) and the lower limit pin (16); the bottom edge of the sliding leg (17) is located below the L-shaped clamp foot (3), and its bottom is an arc-shaped sliding contact surface (20).

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