Lifting appliance for carrying materials

Abstract

The utility model belongs to the field of lifting appliances for transmitting lifting force to an object, and particularly relates to a lifting appliance for carrying materials. In order to save labor, the utility model provides the lifting appliance for carrying the materials. The material carrying lifting appliance comprises two hinged arms which are hinged to each other, one end of each hinged arm is connected with a clamping assembly used for clamping materials, the other end of each hinged arm is connected with a balance weight part, each hinged arm is provided with a hinged part used for being hinged to a lifting chain, and the hinged parts are located between the corresponding balance weight parts and the hinged points of the two hinged arms. At least one hinge arm is provided with a limiting piece used for being matched with the clamping assembly connected with the other hinge arm in a limiting mode when the two clamping assemblies are opened by the maximum angle. By means of the lever principle, the balance weight piece is additionally arranged at the end, away from the clamping assemblies, of the hinge arm, so that it is guaranteed that the clamping assemblies can be naturally opened in the non-hoisting state, meanwhile, the limiting piece is arranged to limit the maximum opening angle of the two clamping assemblies, and safety is guaranteed and labor is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of lifting appliance used to transfer lifting force to objects, in particular to a lifting appliance for material handling. BACKGROUND

[0002] In the process of mechanical manufacturing, it is often required to hoist pipe materials from one position to another. When hoisting, one way is to directly bind a wire rope (i.e. a lifting chain) on the material, which is low in efficiency, and another way is to use a corresponding lifting appliance to hoist the material, which is high in efficiency.

[0003] For example, a Chinese utility model patent with the publication number CN203247014U and the publication date of October 23, 2013 discloses a pipe segment hoisting tool, which comprises two mutually hinged clamping arms (equivalent to hinged arms), the upper end of each clamping arm is connected with a lifting chain, the lower end of each clamping arm is connected with a clamping plate, the mutually connected clamping plates and clamping arms form a structure similar to a "V" shape, and the clamping plate is provided with a friction plate for directly contacting the material to increase the friction between the pipe segment hoisting tool and the material and ensure safety. The single clamping plate and the corresponding friction plate constitute a clamping assembly.

[0004] In a non-hoisting state, the two clamping plates abut against each other under the action of gravity, when hoisting, the two clamping plates need to be opened first, then the clamping plates clamp the pipe segment under the action of gravity, and then the lifting chain is tightened, so that the two clamping plates clamp the side wall surface of the pipe segment to hoist the pipe segment material.

[0005] In the process of using the above pipe segment hoisting tool, the worker needs to repeatedly open the two clamping plates, which wastes labor. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims to provide a lifting appliance for material handling to solve the technical problem of wasting labor in using the existing hoisting tool.

[0007] To achieve the above-mentioned purpose, the technical scheme of the lifting appliance for material handling provided by the utility model is as follows:

[0008] A lifting appliance for material handling, comprising two mutually hinged hinged arms, one end of each hinged arm is connected with a clamping assembly for clamping a material, the other end of each hinged arm is connected with a counterweight, and each hinged arm is provided with a hinged part for being hinged with a lifting chain, the hinged part is located between the corresponding counterweight and the hinged point of the two hinged arms, and at least one hinged arm is provided with a limiting part for limiting cooperation with the clamping assembly connected with the other hinged arm when the two clamping assemblies are opened to the maximum angle.

[0009] Further, the limiting member comprises a limiting rod, at least a portion of the limiting rod is provided with a thread, the hinged arm for mounting the limiting member comprises an arm body and a mounting block connected to the arm body, the mounting block is provided with a threaded hole, the limiting rod is threadedly connected in the threaded hole, an axial length of the threaded hole is less than an axial length of the limiting rod, and an end face of the limiting rod close to one end of the corresponding clamping assembly forms a limiting face for limiting a maximum opening angle of the two clamping assemblies.

[0010] Further, the limiting member is a bolt, a shank of the bolt forms the limiting rod, and an end face of the bolt away from a head of the bolt forms the limiting face.

[0011] Further, the limiting member is arranged on only one hinged arm.

[0012] Further, the hinged points of the two hinged arms are located at one end of the corresponding hinged arm connected with the clamping assembly.

[0013] Further, a distance from the hinged part to the counterweight is less than a distance from the hinged part to the hinged point.

[0014] Further, the clamping assembly comprises a connecting arm and a locking plate, one end of the connecting arm is connected with the corresponding hinged arm, the other end of the connecting arm is connected with the locking plate, and the locking plate is an arc-shaped plate for adapting to an outer circumferential surface of the pipe.

[0015] Further, the connecting arm is hingedly connected with the locking plate, and one end of the connecting arm for connecting with the locking plate is provided with an arc-shaped surface matched with the arc-shaped plate, so as to increase a contact area of the connecting arm and the arc-shaped plate during hoisting.

[0016] Further, the locking plate is detachably connected to the connecting plate.

[0017] Further, the clamping assembly comprises a clamping plate and a friction plate, one end of the clamping plate is connected with the corresponding hinged arm, and the friction plate is arranged on a plate surface of the two clamping plates arranged opposite to each other.

[0018] The lifting device for material handling has the following beneficial effects: the lifting device for material handling is an exploratory invention.

[0019] In actual use of the material handling lifting appliance in the utility model, first, two clamping assemblies are arranged on both sides of the material; then, the lifting chain is lifted by the crane and the like, in the process of lifting the lifting chain, the two clamping assemblies gradually approach and clamp the material; then, the material is lifted to the designated position; finally, the lifting chain is lowered, after the material falls to the ground, the lifting chain is continuously lowered, at this time, since the lifting chain no longer exerts the upward force on the material handling lifting appliance (hinged arm), and the counterweight is heavy, under the action of gravity, the counterweight moves downward, thereby driving the two clamping assemblies to naturally separate, when the two clamping assemblies are opened at the maximum angle, the limiting piece stops the corresponding clamping assembly, so as to avoid the counterweight from continuously moving downward, ensure that the counterweight on any hinged arm does not collide with another hinged arm or the clamping assembly connected with another hinged arm, and ensure construction safety.

[0020] When the next material is lifted, the limiting piece can also ensure that the two hinged arms are not simultaneously turned to the vertical state, and ensure that the lifting chain can be directly lifted without manual participation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of the first specific implementation mode of the material handling lifting appliance specific embodiment 1 of the utility model;

[0022] Figure 2 It is a structure schematic view of the second specific implementation mode of the material handling lifting appliance specific embodiment 1 of the utility model.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, lifting chain; 2, lifting ring; 3, counterweight; 4, hinged arm; 41, arm body; 42, mounting block; 5, connecting arm; 6, limiting piece; 7, locking plate; 8, pipe. DETAILED DESCRIPTION

[0025] In order to solve the problems in the background art, the core inventive concept of the utility model is that a counterweight is added at the end of the hinged arm away from the clamping assembly by using the lever principle, thereby ensuring that the clamping assembly can be naturally opened in the non-lifting state, and at the same time, the limiting piece is arranged to limit the maximum angle of opening of the two clamping assemblies, so as to ensure safety.

[0026] The utility model will be further described in detail in combination with the embodiments.

[0027] The specific embodiment 1 of the material handling lifting appliance provided by the utility model:

[0028] As Figures 1-2As shown, the material handling lifting device includes two hinged arms 4 that are hinged to each other. One end of each hinged arm 4 is connected to a clamping component for clamping materials, and the other end of each hinged arm 4 is connected to a counterweight 3. Each hinged arm 4 is provided with a hinge part for hinged with the lifting chain 1. The hinge part is located between the corresponding counterweight 3 and the hinge point of the two hinged arms 4. At least one hinged arm 4 is provided with a limiting component 6 for limiting and cooperating with the clamping component connected to the other hinged arm 4 when the two clamping components are opened to the maximum angle.

[0029] Among them, Figure 1 In the specific embodiment shown (i.e., the first specific embodiment), the hinge part is a lifting ring 2 mounted on the hinge arm 4. Figure 2 In the specific embodiment shown (i.e., the second specific embodiment), the hinge part is a hinge hole provided on the hinge arm 4; the counterweight 3 is preferably a counterweight block, but it can also be a counterweight plate or other counterweight components; the counterweight 3 is fixedly installed on the hinge arm 4 by bolts, or the counterweight 3 is directly welded to the hinge arm 4, or the counterweight 3 and the hinge arm 4 are integrally formed; the two hinge arms 4 are hinged by a hinge shaft, which can be a bolt, or one of the hinge arms 4 is provided with a hinge shaft, and the other hinge arm 4 is provided with a corresponding hinge hole. After the hinge shaft passes through the corresponding hinge hole, it is provided with a pin hole, and a cotter pin is installed in the pin hole to prevent the two hinge arms 4 from separating during use.

[0030] exist Figure 1 and Figure 2 In the specific embodiment shown, the material handling lifting device is used to lift the pipe 8. The clamping assembly includes a connecting arm 5 and a locking plate 7. One end of the connecting arm 5 is connected to the corresponding hinge arm 4, and the other end is connected to the locking plate 7. The locking plate 7 is an arc-shaped plate used to adapt to the outer circumference of the pipe 8.

[0031] Referring to the Chinese utility model patent with authorization announcement number CN203247014U, the connecting arm 5 and the hinge arm 4 form a "V" shaped structure, and the included angle between the connecting arm 5 and the hinge arm 4 is generally greater than 90°, preferably 100°~160°, which will not be elaborated here.

[0032] As a preferred embodiment, such as Figure 1 As shown, the connecting arm 5 and the locking plate 7 are hinged together via a hinge shaft (e.g., a bolt). The end of the connecting arm 5 that connects to the locking plate 7 has an arc-shaped surface that matches the arc-shaped plate, increasing the contact area between the connecting arm 5 and the arc-shaped plate during hoisting and reducing the maximum pressure between them. Simultaneously, because the connecting arm 5 is hinged to the locking plate 7, the locking plate 7 can rotate adaptively to better conform to the outer surface of the pipe 8.

[0033] Of course, in other specific embodiments, the locking plate 7 can also be fixedly connected to the connecting arm 5 by bolts.

[0034] As a preferred embodiment, as shown in the drawings, the locking plate 7 is detachably connected to the connecting plate by bolts, and different locking plates 7 can be replaced when hoisting pipes 8 of different shapes. Figure 1

[0035] But in other embodiments, the locking plate 7 can also be welded to the connecting arm 5, and different material handling lifting devices need to be replaced when hoisting pipes 8 of different shapes.

[0036] When hoisting materials using the material handling lifting device in the utility model, first, the two clamping assemblies are arranged on both sides of the material; then the lifting chain 1 is lifted by using a crane or other equipment, and in the process of lifting the lifting chain 1, the two clamping assemblies gradually approach and clamp the material; then the material is hoisted to the designated position; finally, the lifting chain 1 is lowered, and after the material falls to the ground, the lifting chain 1 is continuously lowered. At this time, since the lifting chain 1 no longer exerts an upward force on the material handling lifting device (hinged arm 4), and the counterweight 3 is heavy, the counterweight 3 will move downward under the action of gravity, thereby driving the two clamping assemblies to naturally separate. When the two clamping assemblies are at the maximum opening angle, the limiting piece 6 stops the corresponding clamping assembly to prevent the counterweight 3 from continuing to move downward, ensuring that the counterweight 3 on any hinged arm 4 does not collide with the other hinged arm 4 or the clamping assembly connected to the other hinged arm 4, and ensuring construction safety.

[0037] When lifting the next material, the limiting piece 6 can also ensure that the two hinged arms 4 do not simultaneously turn to the vertical state, ensuring that the lifting chain 1 can be directly lifted without the need for manual intervention.

[0038] To facilitate adjustment of the maximum opening angle of the two clamping assemblies, as a preferred embodiment, the limiting piece 6 includes a limiting rod, at least a portion of the limiting rod is provided with a thread, the hinged arm 4 for installing the limiting piece 6 includes an arm body 41 and a mounting block 42 connected to the arm body 41, the mounting block 42 is provided with a threaded hole, the limiting rod is threadedly connected in the threaded hole, the axial length of the threaded hole is less than the axial length of the limiting rod, and the end face of the end of the limiting rod close to the corresponding clamping assembly constitutes a limiting surface for limiting the maximum opening angle of the two clamping assemblies.

[0039] Among them, the mounting block 42 can be welded to the arm body 41, or the mounting block 42 is integrally formed with the arm body 41. In actual use, by screwing the limiting piece 6, the relative position of the limiting surface and the mounting block 42 (arm body 41) can be changed, thereby adjusting the maximum opening angle of the two clamping assemblies.

[0040] ​Preferably, the limiting member 6 is a bolt, the shank of the bolt constitutes the limiting rod, and the end surface of the bolt away from the bolt head constitutes the limiting surface, which is simple in structure and convenient to screw.

[0041] In other specific embodiments, the limiting member 6 is a limiting rod, which is welded on the articulated arm 4, or the limiting rod is threadedly connected on the mounting block 42, and the end of the limiting rod away from the limiting surface is provided with a rotation-stopping surface for cooperating with a wrench to stop rotation.

[0042] In different specific embodiments, the limiting member 6 can be connected on only one articulated arm 4, or the limiting member 6 is connected on both articulated arms 4; when the limiting member 6 can adjust the maximum angle at which the two clamping assemblies are opened, preferably, the limiting member 6 is provided on only one articulated arm 4, at this time, it is not necessary to simultaneously adjust the limiting members 6 on both articulated arms 4, which is convenient to use.

[0043] As a preferred specific embodiment, as shown in Figure 1 the articulation points of the two articulated arms 4 are located at the end of the corresponding articulated arm 4 connected with the clamping assembly, at this time, the force arm of the counterweight 3 is maximum, and a relatively heavy counterweight 3 is not needed to naturally open the two clamping assemblies. At the same time, since the counterweight 3 is relatively light, the material handling lifting appliance is relatively light, and the equipment such as the crane or the tower crane can do less work and save energy when hoisting.

[0044] In the specific embodiment shown in Figure 2 the articulation points of the two articulated arms 4 are located at the middle position of the corresponding articulated arm 4, at this time, the force arm of the counterweight 3 is relatively small, and the counterweight 3 is relatively heavy, and the material handling lifting appliance is relatively heavy.

[0045] In order to further save energy, the distance from the articulation part to the counterweight 3 is less than the distance from the articulation part to the articulation point, at this time, the force arm of the lifting chain 1 connected on the articulation part is relatively large, and the equipment such as the crane or the tower crane can do less work and save energy when hoisting.

[0046] Of course, in other specific embodiments, the distance from the articulation part to the counterweight 3 can also be greater than or equal to the distance from the articulation part to the articulation point, as long as the material can be lifted, which will not be described here.

[0047] The specific embodiment 2 of the material handling lifting appliance provided by the utility model:

[0048] The purpose of the embodiment is to provide a material handling lifting appliance for hoisting a pipe segment.

[0049] The main difference between the embodiment and the specific embodiment 1 is that in the specific embodiment 1, the clamping assembly is used for clamping a pipe material 8, while in the embodiment, the clamping assembly is used for clamping a pipe segment.

[0050] On the basis of referring to Figure 2 The clamping assembly comprises clamping plates and friction plates, one end of the clamping plate is connected with the corresponding articulated arm 4, and the friction plates are arranged on the plate surfaces of the two clamping plates arranged oppositely to clamp the pipe sheet during hoisting.

[0051] Finally, it should be noted that the above is only the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing embodiments without creative labor, or make equivalent replacement for part of the technical features, or organically combine different specific embodiments, so as to combine the specific embodiments given in the drawings, of course, those skilled in the art can also combine the specific embodiments not given in the drawings of the remaining specification. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A material handling spreader, characterized by, The two articulated arms are connected with each other at their one ends with a clamping assembly for clamping materials, and at their other ends with a counterweight, and each of the two articulated arms is provided with an articulation part for being articulated with a hoisting chain, the articulation part being located between the corresponding counterweight and the articulation point of the two articulated arms, and at least one of the two articulated arms is provided with a limiting part for limiting the other clamping assembly connected with the other articulated arm when the two clamping assemblies are opened to the maximum angle.

2. The material handling sling of claim 1, wherein, The limiting part comprises a limiting rod, at least a portion of the limiting rod is provided with a thread, the articulated arm for installing the limiting part comprises an arm body and an installation block connected with the arm body, the installation block is provided with a threaded hole, the limiting rod is threadedly connected in the threaded hole, the axial length of the threaded hole is less than the axial length of the limiting rod, and the end face of the limiting rod close to the corresponding clamping assembly constitutes a limiting face for limiting the maximum angle of opening of the two clamping assemblies.

3. The material handling sling of claim 2, wherein, The limiting part is a bolt, the shank of the bolt constitutes the limiting rod, and the end face of the bolt away from the head constitutes the limiting face.

4. The material handling sling of claim 2 or 3, wherein, Only one of the two articulated arms is provided with the limiting part.

5. The material handling sling according to any one of claims 1-3, wherein, The articulation point of the two articulated arms is located at the end of the corresponding articulated arm connected with the clamping assembly.

6. The material handling sling of any of claims 1-3, wherein, The distance from the articulation part to the counterweight is less than the distance from the articulation part to the articulation point.

7. The material handling sling according to any one of claims 1-3, wherein, The clamping assembly comprises a connecting arm and a locking plate, one end of the connecting arm is connected with the corresponding articulated arm, and the other end of the connecting arm is connected with the locking plate, and the locking plate is an arc-shaped plate for adapting to the outer circumferential surface of the pipe.

8. The material handling sling of claim 7, wherein, The connecting arm is hingedly connected with the locking plate, and the end of the connecting arm for being connected with the locking plate is provided with an arc-shaped face matched with the arc-shaped plate, so as to increase the contact area of the connecting arm and the arc-shaped plate during hoisting.

9. The material handling spreader of claim 7, wherein, The locking plate is detachably connected with the connecting plate.

10. The material handling sling according to any one of claims 1-3, wherein, The clamping assembly comprises a clamping plate and a friction plate, one end of the clamping plate is connected with the corresponding articulated arm, and the friction plate is arranged on the plate face of the two clamping plates arranged opposite to each other.

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