Sheet metal lifting clamp

Abstract

The utility model discloses a sheet metal lifting clamp which comprises a C-shaped hook body, a C-shaped notch is formed in the middle of the C-shaped hook body and used for containing a workpiece, the length of the upper transverse edge of the hook body is smaller than that of the lower transverse edge of the hook body, a lower pressing rod is hinged to the end of the upper transverse edge, the middle of the lower pressing rod is hinged to the upper transverse edge, and the lower pressing rod is hinged to the lower transverse edge. The end, close to the lower transverse edge, of the lower pressing rod is rotationally connected with a pressing wheel, and the end, away from the lower transverse edge, of the lower pressing rod is hinged to a retaining ring. The length of the upper transverse edge of the hook body is smaller than that of the lower transverse edge, so that when the lower pressing rod rotates, the pressing wheel on the lower pressing rod can be tightly pressed on the upper end face of a workpiece, then the workpiece is fixed, and the linear distance from the hinge point of the lower pressing rod and the upper transverse edge to the pressing wheel is smaller than the linear distance from the hinge point to the retaining ring. Through the lever principle, the downward pressure of the pressing wheel can be enhanced under the condition that the upward pulling force is not changed, and then the fixing and clamping effect of the workpiece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting equipment, in particular to a sheet metal lifting clamp. Background Art

[0002] Sheet metal is a comprehensive cold processing technology for thin metal plates (usually less than 6mm), including shearing, punching / cutting / compounding, folding, welding, riveting, splicing, forming (such as car body), etc. Sheet metal parts refer to products processed using sheet metal technology. The thickness of sheet metal parts is consistent everywhere, and they are widely used in the mechanical field.

[0003] In some cases, when welding sheet metal parts, it is necessary to hoist the sheet metal parts to a specified position. However, when hoisting certain regular smooth sheet metal parts, such as cut rectangular sheet metal parts, circular sheet metal parts, etc., since the upper and lower surfaces of the workpiece are smooth surfaces and there are no hoisting points, when hoisting the workpiece, generally a wire ring is set under both ends of the workpiece, and then the wire rings at both ends are hoisted at the same time to hoist the workpiece, or hooks are used at the four corners of the workpiece to hook the four corners of the workpiece to achieve the lifting of the workpiece. However, the above lifting method lacks a fixing component for the workpiece, which is prone to tilting and poses a great safety hazard. Utility Model Content

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a sheet metal lifting clamp, comprising a C-shaped hook body, the middle part of the C-shaped hook body is a C-shaped groove for placing the workpiece, the length of the upper horizontal side of the hook body is smaller than the length of the lower horizontal side, and a lower pressure rod is hinged at the end of the upper horizontal side, the middle part of the lower pressure rod is hinged to the upper horizontal side, one end of the lower pressure rod close to the lower horizontal side is rotatably connected to a pressure wheel, and the end of the lower pressure rod away from the lower horizontal side is hinged to a buckle.

[0005] Furthermore, the straight-line distance from the hinge point between the lower pressure rod and the upper horizontal edge to the pressure wheel is smaller than the straight-line distance to the buckle ring.

[0006] Furthermore, the straight-line distance from the hinge point between the lower pressure rod and the upper horizontal edge to the pressure wheel is smaller than the straight-line distance between the upper horizontal edge and the lower horizontal edge.

[0007] Furthermore, a plurality of hinge holes are provided at one end of the middle portion of the lower pressing rod close to the pressing wheel.

[0008] Furthermore, the outer wall of the pressing wheel is provided with a rubber layer.

[0009] Furthermore, the lower surface of the lower horizontal edge is provided with an inclined edge.

[0010] Compared with the prior art, the advantages of the utility model are:

[0011] The length of the upper horizontal side of the hook body is smaller than that of the lower horizontal side, so that when the lower pressure rod rotates, the pressure wheel thereon can be pressed tightly against the upper end surface of the workpiece, thereby fixing the workpiece.

[0012] The straight-line distance from the hinge point of the lower pressure rod and the upper horizontal edge to the pressure wheel is shorter than the straight-line distance to the buckle ring. Through the lever principle, the downward pressure of the pressure wheel can be enhanced while ensuring the upward pulling force remains unchanged, thereby improving the fixed clamping effect of the workpiece.

[0013] The straight-line distance from the hinge point of the lower pressure rod and the upper horizontal edge to the pressure wheel is smaller than the straight-line distance between the upper horizontal edge and the lower horizontal edge. This arrangement can ensure that when the pressure wheel is pressed down to the upper end surface of the workpiece, the contact force point of the upper end surface and the contact force point of the lower end surface of the workpiece are as close to the vertical line as possible, ensuring that the workpiece is evenly stressed and avoiding the torque force generated by the different contact force points of the upper and lower end surfaces, which affects the stability of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a cross-sectional view of the lower pressure rod.

[0016] In the figure: 1, hook body; 101, C-shaped notch; 102, upper horizontal edge; 103, lower horizontal edge; 2, lower pressure rod; 3, pressure wheel; 4, buckle; 5, hinge hole; 6, rubber layer; 7, inclined edge. DETAILED DESCRIPTION

[0017] The utility model will be further described below.

[0018] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] See also Figure 1-2

[0021] A sheet metal lifting fixture comprises a C-shaped hook body 1, wherein the middle part of the C-shaped hook body 1 is a C-shaped notch 101 for placing a workpiece. When hoisting, the edge of the workpiece is placed in the C-shaped notch 101, and the workpiece 10 is placed on a lower horizontal edge 103, and the lower horizontal edge 103 provides support for the workpiece; a lower pressure rod 2 is hinged at the end of an upper horizontal edge 102 of the hook body 1, wherein the middle part of the lower pressure rod 2 is hinged to the upper horizontal edge 102, and one end of the lower pressure rod 2 close to the lower horizontal edge 103 is rotated and connected It is connected to a pressure wheel 3, and a buckle 4 is hinged at one end of the lower pressure rod away from the lower horizontal edge 103. As shown in the figure, the lower pressure rod 2, the pressure wheel 3, and the buckle 4 are all hinged by bolt connection. The middle part of the bolt is a smooth surface, and the outer wall of the lower part is provided with an external thread. The bolt is fixed by threading a nut on the external thread; and the length of the upper horizontal edge 102 of the hook body 1 is smaller than the length of the lower horizontal edge 103, so that when the lower pressure rod 2 rotates, the pressure wheel 3 thereon can be pressed tightly against the upper end surface of the workpiece, thereby fixing the workpiece.

[0022] Specifically, in the present embodiment, when the pressure wheel 3 is pressed downward, it is achieved by pulling up the buckle ring 4. Therefore, the straight-line distance from the hinge point of the lower pressure rod 2 and the upper horizontal edge 102 to the pressure wheel 3 is smaller than the straight-line distance to the buckle ring 4. Through the lever principle, the downward pressure of the pressure wheel 3 can be enhanced while ensuring that the upward pulling force remains unchanged, thereby improving the fixed clamping effect of the workpiece.

[0023] Specifically, in this embodiment, the straight-line distance from the hinge point of the lower pressure rod 2 and the upper horizontal edge 102 to the pressure wheel 3 is smaller than the straight-line distance between the upper horizontal edge 102 and the lower horizontal edge 103. Such a configuration can ensure that when the pressure wheel 3 is pressed down to the upper end surface of the workpiece, the contact force point of its upper end surface and the contact force point of the lower end surface of the workpiece are as close to the vertical line as possible, thereby ensuring that the workpiece is subjected to uniform force and avoiding the generation of torque due to different contact force points of the upper and lower end surfaces, thereby affecting the stability of the workpiece.

[0024] Specifically, in this embodiment, while ensuring that the straight-line distance from the hinge point of the lower pressure rod 2 and the upper horizontal edge 102 to the pressure wheel 3 is smaller than the straight-line distance to the buckle 4, a plurality of hinge holes 5 are opened in the middle part of the lower pressure rod 2 near one end of the pressure wheel 3. The hinge holes 5 are used to hinge the lower pressure rod 2 on the upper horizontal plate 102. When the pulling force of the upper buckle 4 is constant, the downward pressure of the pressure wheel 3 can be controlled by selecting the hinge holes 5 at different positions, so as to facilitate better regulation.

[0025] Specifically, in the present embodiment, the outer wall of the pressure wheel 3 is provided with a rubber layer 6, which can provide a soft surface to avoid scratches or damage that may be caused by direct metal-to-metal contact, thereby protecting the integrity of the workpiece surface; the surface of the rubber material has a certain adhesion, which can increase the friction between it and the workpiece surface, ensuring a more secure clamping and avoiding sliding or displacement of the workpiece during the lifting process; the rubber layer 6 can reduce the pressure concentration of the clamping force on the workpiece to a certain extent, avoiding deformation or damage that may be caused by excessive local pressure.

[0026] Specifically, in this embodiment, since several workpieces are generally stacked during operation, they are all hoisted from the top workpiece, and an inclined edge 7 is provided on the lower surface of the lower horizontal edge 103. The inclined edge 7 has an inclination angle of 10°-30°. The inclined edge 7 facilitates the smooth insertion of the lower horizontal edge 103 between the two workpieces.

[0027] The working principle of this utility model:

[0028] When using the clamp, an appropriate number of the clamps are used according to the actual situation of the workpiece. For example, when the workpiece is a rectangular plate, four clamps are preferably used, and the operator manually clamps them at the four corners of the workpiece. At this time, the buckle 4 is connected to the lifting device through the hook and the wire rope, such as the conventional lifting devices such as the crane, gantry crane, electric hoist, etc. commonly used in factories, and the wire ropes connected to the buckle rings 4 on the four clamps are connected to a lifting device to ensure that the four buckle rings 4 can be pulled up synchronously. The four buckle rings 4 are pulled up synchronously, and the pressure wheel 3 generates a downward pressure through the lever principle of the lower pressure rod 2. It should be noted that in the process of the pressure wheel 3 pressing downward, since the pressure wheel 3 is rotatably connected, the pressure wheel 3 will generate a friction force on the workpiece away from the hook body 1. The pressure wheel 3 at the left end of the workpiece generates a friction force to the right, and the pressure wheel 3 at the right end generates a friction force to the left. At this time, the two opposite friction forces cancel each other out, leaving only the downward pressure on the workpiece, thereby ensuring the stability of the workpiece clamping. When the workpiece is hoisted, the lifting device stops working, and the downward pressure of the pressure wheel 3 on the workpiece disappears. At this time, the operator cooperates with the rotating pressure wheel 3 to facilitate the operator to pull the hook body 1 out from the workpiece.

[0029] Specific examples are used in this article to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. Changes and improvements to the utility model will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A sheet metal lifting fixture, characterized in that: The invention comprises a C-shaped hook body (1), wherein the middle part of the C-shaped hook body (1) is a C-shaped notch (101) for placing a workpiece, the length of the upper horizontal side (102) of the hook body (1) is less than the length of the lower horizontal side (103), and a lower pressure rod (2) is hinged at the end of the upper horizontal side (102), the middle part of the lower pressure rod (2) is hinged to the upper horizontal side (102), one end of the lower pressure rod (2) close to the lower horizontal side (103) is rotatably connected to a pressure wheel (3), and one end of the lower pressure rod away from the lower horizontal side (103) is hinged to a buckle (4).

2. The sheet metal lifting fixture according to claim 1, characterized in that: The straight-line distance from the hinge point between the lower pressure rod (2) and the upper horizontal edge (102) to the pressure wheel (3) is smaller than the straight-line distance to the buckle ring (4).

3. The sheet metal lifting fixture according to claim 2, characterized in that: The straight-line distance from the hinge point between the lower pressure rod (2) and the upper transverse edge (102) to the pressure wheel (3) is smaller than the straight-line distance between the upper transverse edge (102) and the lower transverse edge (103).

4. The sheet metal lifting fixture according to claim 3, characterized in that: A plurality of hinge holes (5) are provided at one end of the middle portion of the lower pressing rod (2) close to the pressing wheel (3).

5. The sheet metal lifting fixture according to claim 4, characterized in that: The outer wall of the pressing wheel (3) is provided with a rubber layer (6).

6. The sheet metal lifting fixture according to claim 5, characterized in that: The lower surface of the lower horizontal edge (103) is provided with an inclined edge (7).

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