Hoisting clamping arm capable of being opened and closed synchronously for overhead and portal crane

Abstract

The utility model provides a hoisting clamping arm capable of being opened and closed synchronously for a portal crane, which relates to the technical field of clamping arms for portal cranes and comprises an outer box, a mounting plate, a through hole, a first lead screw component, a second lead screw component, a first inner box, a second inner box, a clamping arm and a measuring range expansion component, according to the device, the roller is clamped in a staggered mode so as to carry out follow-up hoisting and transferring operation, so that the clamping area can be further expanded on the basis of stable clamping, the torque transmission path is better, the distribution range of clamping points is wider, meanwhile, the force arm is prolonged and the rigidity is improved through the hoisting clamping arms which are distributed in a staggered mode, and the hoisting efficiency is improved. And the effect of the lifting process of the roller is better.

Description

Technical Field

[0001] This utility model relates to the field of clamping arm technology for bridge and gantry cranes, and more specifically, to a lifting clamping arm for bridge and gantry cranes that can be opened and closed synchronously. Background Technology

[0002] Bridge cranes include both bridge cranes and gantry cranes, both of which belong to the category of bridge-type cranes. A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. It is also known as an overhead crane, gantry crane, or hoist.

[0003] Currently, cranes are needed to lift, move, and transfer large rollers. Existing lifting clamps are generally driven by positive and negative screws. That is, two sets of lifting clamps are symmetrically installed on the screw nuts on both sides of the positive and negative screws. Then, a stepper motor drives the screw nuts on both sides to operate simultaneously, so that the lifting clamps on both sides move towards or away from each other in sync, thereby changing the distance between the lifting clamps on both sides to adapt to rollers of different sizes and complete the clamping. However, this design results in a limited clamping area for long rollers and poor torque transmission path, so the distribution range of clamping points needs to be improved. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art, and then to propose a lifting clamp arm that can be opened and closed synchronously for a bridge gantry crane.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A lifting clamp for a bridge crane that can be opened and closed synchronously includes an outer housing, a mounting plate, a through hole, a first lead screw assembly, a second lead screw assembly, a first inner housing, a second inner housing, the clamp, and a range extension assembly.

[0007] The mounting plates are symmetrically welded onto the open outer casing on both sides;

[0008] Two through holes are offset and installed on two mounting plates;

[0009] The first and second lead screw assemblies are misaligned and fixed on two mounting plates and located inside the outer casing;

[0010] The first inner housing is connected to the second lead screw assembly, and the first inner housing slides inside the outer housing.

[0011] The second inner box is connected to the first lead screw assembly, and the second inner box slides inside the outer box;

[0012] The first inner box and the second inner box move along the through holes that are staggered on both sides;

[0013] The two clamping arms are respectively welded to the bottom of the outer end of the first inner box and the bottom of the outer end of the second inner box;

[0014] The range extension components are installed on the outer casing, the first inner casing, and the second inner casing to enable this lifting device to effectively clamp and lift small-diameter rollers.

[0015] Furthermore, the range extension component includes an elongated hole and a connecting rod. The bottom surface of the outer casing is symmetrically provided with elongated holes that are below and through the through hole. The first inner casing and the second inner casing move horizontally along the through holes that are staggered on both sides. The bottom of the outer ends of the first inner casing and the second inner casing are respectively welded with connecting rods that move along the elongated holes. The connecting rods are welded to the clamping arms.

[0016] Furthermore, the first inner box and the second inner box are respectively provided with sliders, and the outer box is respectively provided with slide rails that slide in cooperation with the sliders on the first inner box and the second inner box.

[0017] Furthermore, the first lead screw assembly and the second lead screw assembly operate synchronously.

[0018] Furthermore, the outer casing, the first inner casing, and the second inner casing are all made of high-strength alloy steel.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] Compared to existing technologies, this device clamps the rollers in a staggered manner for subsequent lifting and transfer operations. This allows for a larger clamping area while maintaining stable clamping, resulting in a better torque transmission path and a wider distribution of clamping points. At the same time, the staggered distribution of the lifting arms extends the lever arm and improves rigidity, leading to better lifting and hoisting results for the rollers. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the outer box;

[0023] Figure 3 This is a schematic diagram of a through hole;

[0024] Figure 4 This is a schematic diagram showing the connection between the first inner box and the second lead screw assembly;

[0025] Figure 5 A schematic diagram showing the positional layout of the first and second lead screw assemblies within the outer casing;

[0026] Figure 6 This is a schematic diagram of a long, narrow hole.

[0027] Figure label:

[0028] 1. Outer casing; 101. Mounting plate; 102. Through hole; 2. First lead screw assembly; 3. Second lead screw assembly; 4. First inner casing; 5. Second inner casing; 6. Clamping arm; 7. Long strip hole; 8. Connecting rod. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0030] like Figures 1 to 5 As shown, a lifting arm for a bridge crane that can be opened and closed synchronously includes an outer housing 1, a mounting plate 101, a through hole 102, a first lead screw assembly 2, a second lead screw assembly 3, a first inner housing 4, a second inner housing 5, a lifting arm 6, and a range extension assembly.

[0031] Mounting plates 101 are symmetrically welded onto the open outer casing 1 on both sides;

[0032] Two through holes 102 are offset on two mounting plates 101;

[0033] The first lead screw assembly 2 and the second lead screw assembly 3 are misaligned and fixed on the two mounting plates 101 and are located inside the outer casing 1;

[0034] The first inner box 4 is connected to the second lead screw assembly 3, and the first inner box 4 slides inside the outer box 1.

[0035] The second inner box 5 is connected to the first lead screw assembly 2, and the second inner box 5 slides inside the outer box 1;

[0036] The first inner box 4 and the second inner box 5 move along the through holes 102 that are staggered on both sides.

[0037] The two clamping arms 6 are respectively welded to the bottom of the outer side of the first inner box 4 and the bottom of the outer side of the second inner box 5;

[0038] The range extension components are installed on the outer box 1, the first inner box 4, and the second inner box 5 to enable this lifting device to effectively clamp and lift small-diameter rollers.

[0039] In a further refinement of the embodiment of this utility model, sliders are respectively provided on the first inner box 4 and the second inner box 5, and slide rails are respectively provided inside the outer box 1 to slide and cooperate with the sliders on the first inner box 4 and the second inner box 5. The slide rails and sliders are not shown in the figure.

[0040] In order to extend the service life of the outer casing 1 and the inner casing and improve their load-bearing capacity, the outer casing 1, the first inner casing 4 and the second inner casing 5 are all made of high-strength alloy steel.

[0041] The working process of this utility model is as follows:

[0042] First, the device is moved above the drum by the overhead crane, and then the lifting device is lowered. When the two lifting clamping arms 6, together with the arc-shaped clamping plates (not labeled in the figure) connected to the lifting clamping arms 6, are respectively on both sides of the drum, the controller controls the two sets of staggered lead screw assemblies to operate sequentially, thereby expanding the clamping area of ​​the drum (i.e., the first lead screw assembly 2 drives the second inner box 5 to move to the right, and the second lead screw assembly 3 drives the first inner box 4 to move to the left, as shown in the instruction manual). Figure 1 As shown in the diagram, the arc-shaped clamping plate will then come into contact with and clamp different areas of the roller;

[0043] This allows for a larger clamping area while maintaining stable clamping, resulting in a better torque transmission path and a wider distribution of clamping points. At the same time, the staggered distribution of the lifting arms 6 extends the lever arm and improves rigidity, making the lifting process of the rollers more effective.

[0044] To ensure that this device can effectively perform staggered clamping and lifting operations on small-diameter rollers, the scheme needs further refinement, such as... Figure 6 As shown, the range extension component includes an elongated hole 7 and a connecting rod 8. The outer casing 1 has symmetrical elongated holes 7 that are below and through the through hole 102 on its bottom surface. The first inner casing 4 and the second inner casing 5 move horizontally along the through holes 102 that are staggered on both sides. The bottom of the outer ends of the first inner casing 4 and the second inner casing 5 are respectively welded with connecting rods 8 that move along the elongated holes 7. The connecting rods 8 are welded to the clamping arms 6. This embodiment further expands the range of sizes that can be clamped on the rollers, while not affecting the clamping of small-diameter rollers, thus making the adaptability of the lifting device better.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hoisting and clamping arm for a bridge portal crane, which can be opened and closed synchronously, characterized in that, The utility model relates to a kind of range expansion assemblies of hoist, including outer box (1), mounting plate (101), through-hole (102), first screw rod assembly (2), second screw rod assembly (3), first inner box (4), second inner box (5), clamping arm (6) and range expansion assembly, The mounting plate (101) is symmetrically welded on the outer box (1) with both sides open; Two through-holes (102) are staggered and arranged on the two mounting plates (101); The first screw rod assembly (2) and the second screw rod assembly (3) are fixedly arranged on the two mounting plates (101) and inside the outer box (1) in a staggered manner; The first inner box (4) is connected with the second screw rod assembly (3), and the first inner box (4) is in sliding fit with the inside of the outer box (1), The second inner box (5) is connected with the first screw rod assembly (2), and the second inner box (5) is in sliding fit with the inside of the outer box (1); The first inner box (4) and the second inner box (5) move along the through-holes (102) staggered and arranged on both sides, respectively; Two clamping arms (6) are respectively welded on the bottom of the outer side end of the first inner box (4) and the second inner box (5); The range expansion assembly is arranged on the outer box (1), the first inner box (4) and the second inner box (5) to enable the hoist to effectively clamp and lift a small-diameter roller.

2. The hoisting and clamping arm of the bridge-gantry crane according to claim 1, characterized in that, The range expansion assembly includes a long slot (7) and a connecting rod (8), and the long slot (7) is symmetrically arranged on the bottom surface of the outer box (1) below the through-hole (102) and penetrates through, the first inner box (4) and the second inner box (5) move horizontally along the through-holes (102) staggered and arranged on both sides, and the bottom of the outer side end of the first inner box (4) and the second inner box (5) is respectively welded with the connecting rod (8) moving along the long slot (7), and the connecting rod (8) is welded with the clamping arm (6).

3. The hoisting and clamping arm of the bridge-gantry crane according to claim 1, characterized in that, The first inner box (4) and the second inner box (5) are respectively provided with a sliding block, and the outer box (1) is respectively provided with a sliding rail in sliding fit with the sliding block on the first inner box (4) and the second inner box (5).

4. The hoisting and clamping arm of the bridge-gantry crane according to claim 1, characterized in that, The outer box (1), the first inner box (4) and the second inner box (5) are all made of high-strength alloy steel.

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