Accurate positioning and clamping device for crane sling

Abstract

The utility model discloses an accurate positioning and clamping device for a crane sling in the technical field of crane slings, which comprises a limiting plate, moving grooves are symmetrically formed in the left side and the right side of the bottom of the limiting plate, and moving blocks are slidably arranged on the front sides and the rear sides of the inner walls of the two moving grooves. Clamping strips are fixedly arranged at the bottoms of the four moving blocks, every two moving blocks form a group, round rods are rotatably arranged on the front sides of the inner walls of the two moving grooves, and the two middle-shaped blocks on the heavier side move downwards, so that the vertical strips of the middle-shaped blocks move downwards till contact with the racks is removed, limiting between the T-shaped blocks and the middle-shaped grooves is removed, and therefore the two middle-shaped blocks on the heavier side move downwards; the two T-shaped blocks slide towards the side, away from the middle of the limiting plate, of the middle-shaped groove, so that after the limiting plate is fixed by a lifting rope of a crane lifting appliance, the limiting plate clamping materials to be lifted can be kept in a horizontal state, and inclination of the lifted materials during transportation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of crane lifting tools, in particular to a precise positioning and clamping device for a crane lifting tool. Background Art

[0002] A crane refers to a multi-action lifting machine that vertically lifts and horizontally transports heavy objects within a certain range. It is also known as a gantry crane, overhead crane, or hoist. The development and use of cranes in the market are becoming more and more extensive. Among them, a crane lifting tool is a tool for handling materials.

[0003] The existing patent (Publication No.: CN214652996U) discloses a crane lifting tool that can achieve precise positioning, including a support chassis, a slide bar, a slide groove, a receiving cavity, a slider, a hook, a positioning hole, a push rod, a cylinder, a connecting rod, a fixed disk, a lifting ring, and an infrared emitter. By designing the lifting tool into a structure with three grasping hooks, the included angle between adjacent spaced hooks is 120°, making the entire lifting tool have good balance. However, this technical solution still has deficiencies, as follows:

[0004] The above device clamps and lifts the material to be lifted by equidistantly arranging three grasping hooks. However, for some materials to be lifted, the weights on both sides are different, which causes the material to be lifted to be prone to tilting. Therefore, we propose a precise positioning and clamping device for a crane lifting tool to solve the above-mentioned problems. Summary of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the name of the utility model of the specification, to avoid obscuring the purpose of this part, the abstract, and the name of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0006] Therefore, the purpose of the utility model is to provide a precise positioning and clamping device for a crane lifting tool, which can solve the problem that when the material to be lifted is clamped and lifted by equidistantly arranging three grasping hooks, the weights on both sides of some materials to be lifted are different, resulting in the material to be lifted being prone to tilting after being lifted.

[0007] To solve the above technical problems, the present utility model provides a precise positioning and clamping device for a crane sling, adopting the following technical solutions: including a limit plate, on the left and right sides of the bottom of the limit plate, moving grooves are symmetrically opened. On the front and rear sides of the inner walls of the two moving grooves, moving blocks are slidably arranged. The bottoms of every two of the four moving blocks are fixedly provided with clamping bars. On the front sides of the inner walls of the two moving grooves, round rods are rotatably arranged. The rear ends of the round rods penetrate through the rear sides of the moving blocks and are rotatably connected to the rear sides inside the moving grooves;

[0008] On the left and right sides of the top of the limit plate, two C-shaped plates are symmetrically and fixedly provided. On the bottoms of the two horizontal plates of the two C-shaped plates, two middle-character-shaped grooves are opened. Inside the middle-character-shaped grooves, moving parts are slidably arranged. On the upper side inside the vertical bars of the middle-character-shaped grooves, clamping bars are fixedly provided.

[0009] By adopting the above technical solutions, this solution is convenient for reducing the inclination that occurs during the transportation of the hoisted materials, and can stably clamp the materials to be hoisted through the limit plate.

[0010] Optionally, the number of the round rods is two. The front end of the left round rod penetrates to the front side of the limit plate. On the front side of the limit plate, a motor is fixedly provided. The output end of the motor is fixedly connected to the front end of the left round rod. On the front and rear sides of the side of the left round rod, thread grooves are opened, and the spiral directions of the two thread grooves are opposite.

[0011] By adopting the above technical solutions, this solution drives the left round rod to rotate through the motor, and can make the round rod drive the thread grooves with opposite thread spirals to make the two clamping bars in a group move inward simultaneously, so as to clamp the materials to be hoisted.

[0012] Optionally, the clamping bar includes two Z-shaped plates. The upper two vertical plates of the two Z-shaped plates are respectively fixedly connected to the bottoms of the two moving blocks in a group. On the opposite sides of the lower two vertical plates of the Z-shaped plate, support plates are fixedly provided. The cross-section of the support plate is a right-angled trapezoid.

[0013] By adopting the above technical solutions, when the support plate with a right-angled trapezoid cross-section moves towards the middle, it is more convenient for its inclined surface to clamp the materials to be hoisted.

[0014] Optionally, the moving part includes four T-shaped blocks. The four T-shaped blocks are respectively slidably arranged inside the four middle-character-shaped grooves. Inside the T-shaped block, a sliding groove is slidably arranged. Inside the sliding groove, a clamping part is slidably arranged.

[0015] By adopting the above technical solutions, this solution enables the T-shaped blocks to slide vertically and stably inside the middle-character-shaped grooves.

[0016] Optionally, the card member includes a Chinese character-shaped block which is slidably disposed inside the sliding groove. Two first compression springs are fixedly connected to the top of the horizontal block of the Chinese character-shaped block, and the top ends of the first compression springs are fixedly connected to the upper side of the inner wall of the sliding groove. The upper side of the vertical block of the Chinese character-shaped block extends to the upper side of the T-shaped block and contacts the side surface of the card strip.

[0017] By adopting the above technical solution, in this solution, when the Chinese character-shaped block moves downward to squeeze the first compression spring, the fixed state of the Chinese character-shaped block on the T-shaped block can be released, and then the rectangular frame can be driven by the T-shaped block to move to an appropriate length.

[0018] Optionally, the card strip is composed of four rack teeth, and the upper sides of the four rack teeth are fixedly connected to the upper sides of the inner walls of the vertical grooves of the four Chinese character-shaped grooves.

[0019] By adopting the above technical solution, in this solution, by moving the upper side of the vertical block of the Chinese character-shaped block into different rack teeth, the position of the T-shaped block can be quickly adjusted, and then the inclination of the limiting plate can be adjusted according to the different weights of the materials on the upper side of the limiting plate, so as to ensure that the limiting plate is in a horizontal state.

[0020] Optionally, a rectangular frame is fixedly connected to the lower side of the vertical block of the T-shaped block, and the side surface of the rectangular frame is fixedly connected to the side surface of the C-shaped plate.

[0021] By adopting the above technical solution, in this solution, the connecting rope of the crane hook can be conveniently fixed through the rectangular frame.

[0022] Optionally, an I-shaped plate is movably inserted into the upper side of the limiting plate. Two second compression springs are fixedly arranged on the top of the lower horizontal plate of the I-shaped plate, and the top ends of the second compression springs are fixedly connected to the bottom of the limiting plate.

[0023] By adopting the above technical solution, in this solution, the lower horizontal plate of the I-shaped plate can clamp the material to be hoisted, increasing the stability of clamping the material.

[0024] In summary, the present utility model has at least the following beneficial effects:

[0025] By moving down the two Chinese character-shaped blocks on the heavier side, the vertical bars of the Chinese character-shaped blocks are moved down to release the contact with the rack teeth, and the limit between the T-shaped block and the Chinese character-shaped groove is released. By sliding the two T-shaped blocks to the side of the Chinese character-shaped groove away from the middle of the limiting plate, after the lifting rope of the crane lifting appliance fixes the limiting plate, the limiting plate clamping the material to be hoisted remains in a horizontal state, reducing the inclination during the transportation of the hoisted material.

[0026] Attach the bottom of the limit plate to the upper side of the material to be lifted. Drive the left circular rod to rotate through the rotating shaft of the motor, so that the left circular rod drives the two moving blocks in a group to close inward simultaneously through two threaded grooves with opposite thread spirals, making the two Z-shaped plates and the two support plates close inward simultaneously, clamp the material to be lifted and move it to the upper side of the support plate, and fix the material to be lifted through the lower horizontal plate of the I-shaped plate, so that the limit plate can stably clamp the material to be lifted. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Schematic three-dimensional structure diagram of the present invention;

[0029] Figure 2 Side view of the present invention;

[0030] Figure 3 Partial three-dimensional structure sectional view of the limit plate of the present invention;

[0031] Figure 4 Partial three-dimensional structure diagram of the limit plate of the present invention;

[0032] Figure 5 Partial three-dimensional structure sectional view of the C-shaped plate of the present invention.

[0033] Explanation of the reference numerals: 1. Limit plate; 101. Motor; 102. I-shaped plate; 103. Second compression spring; 2. Moving groove; 3. Moving block; 4. Clamping strip; 401. Z-shaped plate; 402. Support plate; 5. Circular rod; 501. Threaded groove; 6. C-shaped plate; 7. Middle-shaped groove; 8. Moving part; 801. T-shaped block; 802. Sliding groove; 803. Locking part; 804. Middle-shaped block; 805. First compression spring; 806. Rectangular frame; 9. Locking bar; 901. Rack. Detailed Description of the Embodiments

[0034] The following will further elaborate on the present invention Figures 1-5 with reference to the attached drawings.

[0035] Embodiment 1, refer to Figures 1-5, in this embodiment, in order to solve the problem that in the existing technology, three grabbing hooks are arranged at equal distances to clamp and lift the material to be lifted, but the weights on both sides of some materials to be lifted are different, which causes the material to be lifted to be prone to tilt after being lifted. The utility model discloses a precise positioning and clamping device for a crane sling.

[0036] On the left and right sides of the top of the limiting plate 1, two C-shaped plates 6 are symmetrically and fixedly arranged. On the bottom of the two cross plates of the two C-shaped plates 6, two middle-character-shaped grooves 7 are opened. A moving member 8 is slidably arranged inside the middle-character-shaped groove 7, and a clamping bar 9 is fixedly arranged on the upper side inside the vertical bar of the middle-character-shaped groove 7.

[0037] The moving member 8 includes four T-shaped blocks 801. The four T-shaped blocks 801 are respectively slidably arranged inside the four middle-character-shaped grooves 7. A sliding groove 802 is slidably arranged inside the T-shaped block 801, and a clamping member 803 is slidably arranged inside the sliding groove 802. The T-shaped block 801 can stably slide vertically inside the middle-character-shaped groove 7.

[0038] The clamping member 803 includes a middle-character-shaped block 804. The middle-character-shaped block 804 is slidably arranged inside the sliding groove 802. On the top of the cross block of the middle-character-shaped block 804, two first compression springs 805 are fixedly connected. The top ends of the first compression springs 805 are fixedly connected to the upper side of the inner wall of the sliding groove 802. The upper side of the vertical block of the middle-character-shaped block 804 extends to the upper side of the T-shaped block 801 and contacts the side surface of the clamping bar 9. By moving the middle-character-shaped block 804 downward to squeeze the first compression springs 805, the fixed state of the middle-character-shaped block 804 on the T-shaped block 801 can be released, and then the rectangular frame 806 can be driven by the T-shaped block 801 to move to a suitable length.

[0039] The clamping bar 9 is composed of four rack teeth 901, and the upper sides of the four rack teeth 901 are fixedly connected to the upper sides of the inner walls of the vertical grooves of the four middle-character-shaped grooves 7. By moving the upper side of the vertical block of the middle-character-shaped block 804 into different rack teeth 901, the position of the T-shaped block 801 can be quickly adjusted, and then the inclination of the limiting plate 1 can be adjusted according to the different weights of the materials on the upper side of the limiting plate 1, so as to ensure that the limiting plate 1 is in a horizontal state.

[0040] The lower side of the vertical block of the T-shaped block 801 is fixedly connected to a rectangular frame 806. The side surface of the rectangular frame 806 is fixedly connected to the side surface of the C-shaped plate 6. The connecting rope of the crane hook can be conveniently fixed through the rectangular frame 806.

[0041] The specific working principle is as follows: When it is known through intuitive or detection means that the weights on the upper sides of the materials to be lifted are different, the two middle-shaped blocks 804 on the heavier side are moved downward, so that the vertical bars of the middle-shaped blocks 804 move downward to release the contact with the rack 901, and further release the limiting state between the T-shaped blocks 801 and the middle-shaped groove 7. By sliding the two T-shaped blocks 801 toward the side of the middle-shaped groove 7 away from the middle of the limiting plate 1, after the lifting rope of the crane spreader fixes the limiting plate 1, the limiting plate 1 clamping the material to be lifted remains in a horizontal state, thereby reducing the inclination that occurs during the transportation of the lifted material.

[0042] Embodiment 2. Refer to Figures 1-5 , in this embodiment, in order to solve the problem of poor stability of the existing clamping of the lifted material, based on the same concept as in Embodiment 1 above, the precise positioning and clamping device for a crane spreader further includes:

[0043] A limiting plate 1. Moving grooves 2 are symmetrically opened on the left and right sides of the bottom of the limiting plate 1. Moving blocks 3 are slidably arranged on the front and rear sides of the inner walls of the two moving grooves 2. The bottoms of the four moving blocks 3 in two groups are fixedly provided with clamping bars 4. Round rods 5 are rotatably arranged on the front sides of the inner walls of the two moving grooves 2. The rear ends of the round rods 5 penetrate through the rear sides of the moving blocks 3 and are rotatably connected to the rear sides inside the moving grooves 2.

[0044] The clamping bar 4 includes two Z-shaped plates 401. The upper two vertical plates of the two Z-shaped plates 401 are fixedly connected to the bottoms of the two moving blocks 3 in a group respectively. Support plates 402 are fixedly arranged on the opposite sides of the lower two vertical plates of the Z-shaped plate 401. The cross-section of the support plate 402 is a right trapezoid. When the support plate 402 with a right trapezoid cross-section moves toward the middle, it is more convenient to clamp the material to be lifted with its inclined surface.

[0045] The number of the round rods 5 is two. The front end of the left round rod 5 penetrates to the front side of the limiting plate 1. A motor 101 is fixedly arranged on the front side of the limiting plate 1. The output end of the motor 101 is fixedly connected to the front end of the left round rod 5. Thread grooves 501 are opened on the front and rear sides of the side surface of the left round rod 5, and the two thread grooves 501 are spiraled in opposite directions. By driving the left round rod 5 to rotate through the motor 101, the round rod 5 can drive the thread grooves 501 with opposite thread spirals to make the two clamping bars 4 in a group move inward simultaneously to clamp the material to be lifted.

[0046] An I-shaped plate 102 is movably inserted on the upper side of the limiting plate 1. Two second compression springs 103 are fixedly arranged on the top of the lower horizontal plate of the I-shaped plate 102. The top ends of the second compression springs 103 are fixedly connected to the bottom of the limiting plate 1. The lower horizontal plate of the I-shaped plate 102 can clamp the material to be lifted, increasing the stability of the clamping of the material.

[0047] The specific working principle is as follows: By using a transportation device, the material to be lifted is moved to the lower side of the hoist, and the four sides of the bottom of the material to be lifted are in a suspended state. By fitting the bottom of the limit plate 1 to the upper side of the material to be lifted, then the left circular rod 5 is rotated by the rotating shaft of the motor 101, and the left circular rod 5 drives two groups of moving blocks 3 to close inward simultaneously through two screw grooves 501 with opposite helical threads opened on its side surface, so that the two Z-shaped plates 401 and the two support plates 402 close inward simultaneously, clamp the material to be lifted and move it to the upper side of the support plate 402, and fix the material to be lifted through the lower horizontal plate of the I-shaped plate 102, enabling the limit plate 1 to stably clamp the material to be lifted.

[0048] Example three, referring to Figures 1-5 , in this embodiment, in order to solve the problem that it is relatively inconvenient to lift and transport materials of different sizes in the prior art, based on the same concept as in the above-mentioned Example one, this precise positioning and clamping device for a crane sling further includes:

[0049] Moving grooves 2 are symmetrically opened on the left and right sides of the bottom of the limit plate 1. On the front and rear sides of the inner walls of the two moving grooves 2, moving blocks 3 are slidably arranged. The bottoms of the four moving blocks 3, two in a group, are fixedly provided with clamping strips 4.

[0050] The clamping strip 4 includes two Z-shaped plates 401. The upper two vertical plates of the two Z-shaped plates 401 are respectively fixedly connected to the bottoms of the two groups of moving blocks 3. On the opposite sides of the lower two vertical plates of the Z-shaped plate 401, support plates 402 are fixedly provided. The cross-section of the support plate 402 is a right trapezoid. When the support plate 402 with a right trapezoidal cross-section moves towards the middle, it is more convenient to clamp the material to be lifted with its inclined surface.

[0051] The specific working principle is as follows: The left circular rod 5 is rotated by the drive of the motor 101, and the front and rear sides of the left circular rod 5 are provided with screw grooves 501 with opposite helical threads. When the left circular rod 5 rotates, it drives the two left moving blocks 3 to close inward or open outward simultaneously, so that the two left moving blocks 3 drive the two starting Z-shaped plates 401 and the support plates 402 to move simultaneously, adjusting the opening size between the two Z-shaped plates 401 and the two support plates 402, and thus the materials of different sizes to be lifted can be quickly clamped.

[0052] The above are all the preferred embodiments of the present invention. The protection scope of the present invention is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A precise positioning clamping device for a crane spreader, comprising a limit plate (1), characterized in that: The bottom of the limit plate (1) is symmetrically provided with movable grooves (2) on both left and right sides, and movable blocks (3) are slidably provided on both front and rear sides of the inner walls of the two movable grooves (2). The bottoms of the four movable blocks (3) are fixedly provided with clamping strips (4) in groups of two, and the front sides of the inner walls of the two movable grooves (2) are rotatably provided with round rods (5), and the rear ends of the round rods (5) penetrate the rear sides of the movable blocks (3) and are rotatably connected to the rear sides of the movable grooves (2); Two C-shaped plates (6) are symmetrically fixedly arranged on the left and right sides of the top of the limiting plate (1), and two center-shaped grooves (7) are provided at the bottoms of the two horizontal plates of the two C-shaped plates (6). A moving part (8) is slidably arranged inside the center-shaped groove (7), and a clamping strip (9) is fixedly arranged on the upper side of the vertical strip inside the center-shaped groove (7).

2. The precise positioning and clamping device for a crane spreader according to claim 1, characterized in that: There are two round rods (5), the front end of the left round rod (5) penetrates to the front side of the limit plate (1), a motor (101) is fixedly arranged on the front side of the limit plate (1), the output end of the motor (101) is fixedly connected to the front end of the left round rod (5), and the front and rear sides of the side surface of the left round rod (5) are both provided with thread grooves (501), and the directions of the thread spirals of the two thread grooves (501) are opposite.

3. The precise positioning clamping device for a crane spreader according to claim 1, characterized in that: The clamping strip (4) comprises two Z-shaped plates (401), the two upper vertical plates of the two Z-shaped plates (401) are respectively fixedly connected to the bottom of a group of two moving blocks (3), and the two lower vertical plates of the Z-shaped plates (401) are fixedly provided with support plates (402) on opposite sides, and the cross section of the support plates (402) is a right-angled trapezoid.

4. The precise positioning clamping device for a crane spreader according to claim 1, characterized in that: The moving member (8) comprises four T-shaped blocks (801), the four T-shaped blocks (801) are respectively slidably arranged inside four Chinese-shaped grooves (7), a sliding groove (802) is slidably arranged inside the T-shaped blocks (801), and a clamping member (803) is slidably arranged inside the sliding groove (802).

5. The precise positioning clamping device for a crane spreader according to claim 4, characterized in that: The clamping member (803) comprises a center-shaped block (804), wherein the center-shaped block (804) is slidably arranged inside the sliding groove (802), and the top of the horizontal block of the center-shaped block (804) is fixedly connected to two first compression springs (805), and the top of the first compression spring (805) is fixedly connected to the upper side of the inner wall of the sliding groove (802), and the upper side of the vertical block of the center-shaped block (804) extends to the upper side of the T-shaped block (801) and contacts the side of the clamping strip (9).

6. The precise positioning clamping device for a crane spreader according to claim 5, characterized in that: The clamping strip (9) is composed of four racks (901), and the upper sides of the four racks (901) are fixedly connected to the upper sides of the inner walls of the vertical grooves of the four middle-shaped grooves (7).

7. The precise positioning clamping device for a crane spreader according to claim 4, characterized in that: A rectangular frame (806) is fixedly connected to the lower side of the vertical block of the T-shaped block (801), and the side of the rectangular frame (806) is fixedly connected to the side of the C-shaped plate (6).

8. The precise positioning and clamping device for a crane spreader according to claim 1, characterized in that: An I-shaped plate (102) is movably inserted on the upper side of the limiting plate (1), and two second compression springs (103) are fixedly arranged on the top of the lower horizontal plate of the I-shaped plate (102), and the top end of the second compression spring (103) is fixedly connected to the bottom of the limiting plate (1).

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