Lifting clamp

Abstract

The utility model discloses a hoisting clamp which comprises a hoisting mechanism, a hoisting tool is connected below the hoisting mechanism, the hoisting tool comprises two hoisting arms and two clamping arms, and the two hoisting arms are movably arranged on the hoisting mechanism and face downwards to form an inverted V-shaped structure; the two clamping arms are hinged in a crossed mode to form a scissor-shaped structure, and the upper ends of the two clamping arms are hinged to the lower ends of the two suspension arms respectively. Clamping heads are arranged at the lower ends of the two clamping arms, and the clamping heads form a structure bent downwards relative to the main body parts of the clamping arms. In the lifting process, on one hand, the aluminum guide rod can be prevented from falling off, on the other hand, an operator does not need to hang a sling in series in the process of hanging and separating the aluminum guide rod, the clamping part of a workpiece is very convenient to adjust, and the situation that the aluminum guide rod falls off in the working process of hanging, separating, lifting and the like can be effectively avoided. And meanwhile, the potential safety hazard caused by the fact that the workpieces are placed on the stations is avoided. The whole hoisting clamp is simple in structure, easier and more convenient to operate and safer in the using process.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting tools, in particular to a lifting fixture which can be used for lifting workpieces such as anodized aluminum guide rods. Background Art

[0002] Many industries require lifting to move heavy or dangerous workpieces. For example, in the aluminum electrolysis industry, in the past, the anode workshop generally used simple slings to tie aluminum guide rods for lifting. During maintenance operations, it is necessary to manually contact the aluminum guide rods at close range and string slings to tie them to specific positions on the aluminum guide rods. Operators need to repeatedly tie and untie each set of aluminum guide rods to be repaired. After bundling, operators need to manually assist in maintaining balance on one end before lifting. If the center of gravity of the binding is not good, the grip force of the operator to assist in maintaining balance will increase. In severe cases during the lifting process, the operator will be pulled to move, which may cause mechanical injuries and lifting injuries to personnel. Furthermore, every time an operator repairs a set of aluminum guide rods, they face the risk of frequent contact with the hanging parts, and improper stacking may cause the workpiece to slip and injure personnel. To this end, people have invented some lifting devices for lifting workpieces such as anode guide rods, such as the self-locking lifting device for lifting electrolytic aluminum anode guide rods disclosed in patent CN202121435474.0, which can lift the workpiece more steadily, prevent it from slipping, and improve safety. However, the lifting device has problems such as complex structure, difficulty in loading and unloading workpieces, etc. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a lifting fixture which is simple, practical, easy to operate and can load and unload workpieces easily and quickly, in view of the defects in the prior art.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a lifting clamp, including a hanging mechanism, a lifting clamp is connected below the hanging mechanism, and is characterized in that: the lifting clamp includes two hanging arms and two clamping arms, the two hanging arms are movably installed on the hanging mechanism to form an inverted V-shaped structure downward; the two clamping arms are cross-hinged to form a scissors-like structure, and the upper ends of the two clamping arms are respectively hinged to the lower ends of the two hanging arms; the lower ends of the two clamping arms are provided with clamping heads, and the clamping heads form a downwardly bent structure relative to the main body of the clamping arms.

[0005] Furthermore, the upper ends of the two clamping arms are respectively provided with connecting heads that are bent outward and extended downward, and the two connecting heads are movably connected to the lower ends of the two suspension arms through second pivots.

[0006] Furthermore, the hanging mechanism includes a hanging ring and a hanging bracket, the hanging ring is provided with a hanging hole, and the hanging bracket is connected to the bottom of the hanging ring.

[0007] Furthermore, the top ends of the two suspension arms are movably connected to the suspension frame through a first pivot.

[0008] Furthermore, the middle positions of the two clamping arms are movably connected through a third pivot to form a scissor-like structure, and the two clamping heads are located below the third pivot.

[0009] Furthermore, anti-skid patterns are respectively arranged on the inner side walls of the two clamps, and the anti-skid patterns are a plurality of strip-shaped teeth with triangular or rectangular cross-sections.

[0010] Preferably, a set of slings is installed under the hanging mechanism, so as to form a single sling, which is more suitable for lifting workpieces with regular shapes and uniform weight distribution, such as straight rods. The single sling also includes a limit rod in a V shape with a hook at the head end, a fixed sleeve is provided on the side of the hanger, and the limit sleeve is fixed at the outer end of the third pivot; the limit rod is movably inserted into the fixed sleeve, and the limit sleeve at the outer end of the third pivot is hooked by the hook at the head end of the limit rod to form a limiting structure for the opening of the two clamp arms.

[0011] Alternatively, two sets of slings are installed under the hanging mechanism, the two sets of slings are opposite to each other and spaced apart, the lifting arms and clamping arms of the two sets of slings are connected in series by the same second pivot, and the clamping arms of the two sets of slings are connected in series by the same third pivot. This double sling is more suitable for lifting workpieces with irregular shapes and uneven weight distribution, such as a guide rod with one end light and the other end heavy.

[0012] For the double sling, it also includes a limit handle, which is a T-shaped structure. Its upper end is hinged to a fixed sleeve arranged at the bottom of the hanger of the hanging mechanism, and a hook is arranged at the lower end. The hook at the lower end of the limit handle hooks the third pivot to form a limiting structure for the opening of the clamp arms on both sides.

[0013] The utility model can be used for the maintenance and lifting of workpieces such as aluminum guide rods. During the lifting process, on the one hand, it can prevent the aluminum guide rod from falling off. On the other hand, in the process of hanging and detaching the aluminum guide rod, the operator does not need to string the sling, and it is very convenient to adjust the clamping part of the workpiece, which can effectively avoid the safety hazards caused by the accidental loss of balance of the workpiece during the hanging, detaching and lifting operations, and at the same time solve the safety hazards of placing the workpiece at the workstation. The entire lifting fixture has a simple structure, is easier and more convenient to operate, and is safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a plan view of a first embodiment of the utility model;

[0015] Figure 2 It is a plan view of a second embodiment of the utility model;

[0016] Figure 3 It is a side schematic diagram of a second embodiment of the utility model.

[0017] In the figure, 11 is a lifting ring, 12 is a hanger, 13 is a fixing sleeve, 2 is a lifting arm, 3 is a clamping arm, 31 is a clamping head, 32 is a connecting head, 33 is an anti-slip pattern, 4 is a limiting rod, 51 is a first pivot, 52 is a second pivot, 53 is a third pivot, 6 is a limiting handle, A is a first sling, and B is a second sling. DETAILED DESCRIPTION

[0018] Example 1, reference Figure 1 The lifting fixture includes a hanging mechanism, and a hanging fixture is connected below the hanging mechanism; the hanging fixture includes two hanging arms 2 and two clamping arms 3, and the two hanging arms 2 are movably installed on the hanging mechanism to form an inverted V-shaped structure downward; the two clamping arms 3 are cross-hinged to form a scissor-like structure, and the upper ends of the two clamping arms 3 are respectively hinged to the lower ends of the two hanging arms 2; the lower ends of the two clamping arms 3 are provided with clamping heads 31, and the clamping heads 31 form a downwardly bent structure relative to the main body of the clamping arms 3, so as to stably clamp the two side surfaces of the anode guide rod.

[0019] The upper ends of the two clamping arms 3 are respectively provided with connecting heads 32 bent outward and downward, and the two connecting heads 32 are respectively movably connected to the lower ends of the two suspension arms 2 through the second pivots 52. This can provide a greater torque, and after the anode guide rod is lifted up, the suspension arm 2 can be pulled down by its own gravity, so that the suspension arm 2 shrinks inward, pulling the clamping arms 3 to shrink inward, and finally clamping the anode guide rod more firmly.

[0020] The hanging mechanism comprises a hanging ring 11 and a hanging bracket 12 . The hanging ring 11 is provided with a hanging hole for hanging on an overhead travelling crane; the hanging bracket 12 is connected to the bottom of the hanging ring 11 .

[0021] The top ends of the two suspension arms 2 are movably connected to the suspension bracket 11 through a first pivot 51 and can rotate inwards and outwards to change the opening angle.

[0022] The middle parts of the two clamping arms 3 are movably connected via a third pivot 53 to form a scissor-like structure, and the two clamping heads 31 are located below the third pivot 53 .

[0023] Anti-skid patterns 33 are respectively arranged on the inner side walls of the two clamps 31. The anti-skid patterns 33 are a plurality of strip-shaped teeth with triangular or rectangular cross-sections. The anti-skid patterns 33 can increase the friction force with the surface of the anode guide rod, thereby improving the stability of clamping.

[0024] A set of slings is installed under the hanger 12, so that a single sling is formed, which is more suitable for lifting workpieces with regular shapes and uniform weight distribution, such as straight rods. The single sling also includes a limit rod 4 in a V shape with a hook at the head end, a fixed sleeve 13 is provided on the side of the hanger 12, and a limit sleeve 34 is fixed at the outer end of the third pivot 53; the limit rod 4 is movably inserted into the fixed sleeve 13, and when the anode guide rod needs to be lowered, after the anode guide rod touches the ground, the hook at the head end of the limit rod 4 is hooked to the limit sleeve 34 at the outer end of the third pivot 53, so that the opening of the suspension arm 2 and the clamp arm 3 can no longer change, thereby maintaining the opening angle.

[0025] Example 2, reference Figure 2 and Figure 3 , the difference is that two sets of slings are installed under the hanging mechanism, namely the first sling A and the second sling B, the two sets of slings are opposite to each other and separated by a distance, the first sling A and the second sling B's suspension arms 2 and clamping arms 3 are connected in series by the same second pivot 52, and the first sling A and the second sling B's clamping arms 3 are connected in series by the same third pivot 53. The double slings formed in this way as an integral structure are more suitable for lifting workpieces with irregular shapes and uneven weight distribution, such as a guide rod with one end light and the other end heavy. By clamping different parts of the guide rod by the first sling A and the second sling B respectively, the balance during lifting can be improved and the time for adjusting the clamping position of the sling to achieve balance can be reduced.

[0026] The double sling further includes a limit handle 6, which is a T-shaped structure, the upper end of which is hinged to a fixing sleeve 13 arranged in the middle of the bottom of the hanger 12, and the lower end is provided with a hook, and the hook at the lower end of the limit handle 6 hooks the third pivot 53 to form a limit structure for the opening of the clamp arms 3 on both sides. The function and principle are similar to the limit rod of the single sling.

[0027] Material and specifications: The lifting ring 11 is δ = 10mm steel plate, the hanger 12 is δ = 10mm steel plate, the arm 2 is δ = 12 / 30mm steel plate, the arm 3 is δ = 20 / 30mm steel plate, and the limit rod 4 is Round steel. All parts are cut by plasma cutting technology. The lifting ring 11 and the hanger 12 are connected by welding technology (full welding). The lifting ring 11 is welded to the middle position of the length direction of the hanger 12. The square steel of the hanger 12 is δ=10mm steel plate and connected by welding technology (full welding). The hanger 12 and the boom 2 are connected by M18*100 high-strength bolts. The boom 2 and the clamping arm 3 and the two clamping arms 3 are connected by M18*100 high-strength bolts. The clamping surface of the clamping arm 3 is treated with teeth to ensure that the clamping surface has sufficient friction. The maximum opening size of the clamping arm 3 is less than 240mm.

[0028] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A lifting fixture, comprising a hanging mechanism, a hanging device connected below the hanging mechanism, characterized in that: The sling includes two lifting arms and two clamping arms. The two lifting arms are movably installed on the hanging mechanism to form an inverted V-shaped structure downward; the two clamping arms are cross-hinged to form a scissor-like structure, and the upper ends of the two clamping arms are respectively hinged to the lower ends of the two lifting arms; the lower ends of the two clamping arms are provided with clamping heads, which form a downwardly bent structure relative to the main body of the clamping arms.

2. The lifting fixture according to claim 1, characterized in that: The upper ends of the two clamping arms are respectively provided with connecting heads which are bent outward and extended downward, and the two connecting heads are respectively movably connected with the lower ends of the two suspension arms through second pivots.

3. The lifting fixture according to claim 1, characterized in that: The hanging mechanism comprises a hanging ring and a hanging bracket, the hanging ring is provided with a hanging hole, and the hanging bracket is connected to the bottom of the hanging ring.

4. The lifting fixture according to claim 3, characterized in that: The top ends of the two suspension arms are movably connected to the suspension frame through a first pivot.

5. The lifting fixture according to claim 3, characterized in that: The middle parts of the two clamping arms are movably connected through a third pivot to form a scissor-like structure, and the two clamping heads are located below the third pivot.

6. The lifting fixture according to claim 1, characterized in that: Anti-skid patterns are respectively arranged on the inner side walls of the two clamps, and the anti-skid patterns are a plurality of strip-shaped teeth with triangular or rectangular cross sections.

7. The lifting fixture according to claim 3, characterized in that: It also includes a limiting rod in a V shape with a hook at the head end, a fixing sleeve is arranged on the side of the hanger, and the limiting sleeve is fixed at the outer end of the third pivot; the limiting rod is movably inserted into the fixing sleeve, and the limiting sleeve at the outer end of the third pivot is hooked by the hook at the head end of the limiting rod to form a limiting structure for the opening of the two clamping arms.

8. The lifting fixture according to any one of claims 1 to 7, characterized in that: A set of slings is installed under the hanging mechanism.

9. The lifting fixture according to any one of claims 1 to 6, characterized in that: Two sets of slings are installed under the hanging mechanism. The two sets of slings are opposite to each other and spaced a distance apart. The lifting arms and clamping arms of the two sets of slings are connected in series by the same second pivot, and the clamping arms of the two sets of slings are connected in series by the same third pivot.

10. The lifting fixture according to claim 9, characterized in that: It also includes a limit handle, which has a T-shaped structure. Its upper end is hinged to a fixed sleeve arranged at the bottom of the hanger of the hanging mechanism, and a hook is arranged at the lower end. The hook at the lower end of the limit handle hooks the third pivot to form a limiting structure for the opening of the clamp arms on both sides.

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