A forging lifting clamp

Abstract

The utility model relates to the technical field of forging equipment, and in particular to a forging hanging tongs. It comprises a right tongs body and a left tongs body, and the middle parts of the two tongs bodies are hinged by a first pin shaft, the ends of the two tongs bodies are respectively hinged to one end of two connecting plates, and the other ends of the two connecting plates are simultaneously hinged to the lower end of the hanging plate, a seat block is arranged at one end of the first pin shaft, the top of the seat block is rotatably connected to a pull rod which is always located on the symmetry plane of the hanging tongs, one end of the crossbeam is rotatably connected to a tongs body, a slider is simultaneously slidably connected to the crossbeam and the pull rod, a plurality of channels are symmetrically arranged on the circumference of the guide hole on the slider about its axis, a blocking block and a push block group are arranged on the pull rod, and a push assembly is arranged on the bottom surface of the slider. After the workpiece is put down, the utility model does not require human intervention to avoid the two grabbing sections from re-clamping the workpiece, which is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of forging equipment, in particular to a forging hanging tong. Background Art

[0002] Large cylindrical forgings need to be lifted with a lifting clamp for transportation after forging. The patent with application number 202022053532.5 discloses a grabbing pliers for a forging workshop, including a pin shaft, on which are arranged more than two groups of grabbing pliers assemblies, the grabbing pliers assembly including two connecting rods and two pliers, on which are arranged hinge points, the pliers are divided into two sections with the hinge point as the dividing point, one section being a connecting section and one end being a grabbing section, one end of the two connecting rods is hinged on the pin shaft, and the other end is hinged to the end portions of the connecting sections of the two pliers respectively, the two pliers are hinged at the hinge point, the two connecting rods and the connecting sections of the two pliers form a rhombus, after the two pliers are hinged, the two grabbing sections form a "C"-shaped structure, an inverted U-shaped hook is provided on the pin shaft, which can ensure the safety during the lifting process, reduce the labor intensity of the operator, and save the time for frequent replacement of lifting tools, but although it can lift the workpiece, after the workpiece is put down, human intervention is required so that the two grabbing sections will not re-clamp the workpiece when the inverted U-shaped hook is lifted, thereby causing the lifting pliers to separate from the workpiece. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a forging hanging tongs in view of the above-mentioned technical deficiencies.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a forging tongs, including a right tongs body and a left tongs body, and the middle parts of the two tongs are hinged by a first pin shaft, the ends of the two tongs bodies are respectively hinged to one end of two connecting plates, and the other end of the two connecting plates is simultaneously hinged to the lower end of the hanging plate, one end of the first pin shaft is provided with a seat block, the top of the seat block is rotatably connected with a pull rod which is always located on the symmetry plane of the tongs, the two tongs bodies are respectively rotatably connected to the crossbeam and the guide block, the crossbeam is slidably connected to the guide block, the slider is simultaneously slidably connected to the crossbeam and the pull rod, the circumference of the guide hole on the slider is symmetrically provided with a plurality of through channels about its axis, the pull rod is respectively provided with a blocking block and a pushing block group at the positions above and below the slider, and the bottom surface of the slider is provided with a pushing component which can interact with the pushing block group to rotate the pull rod so that the blocking block can and cannot pass through the channel when the workpiece is lifted and after the workpiece is put down.

[0005] To further optimize the technical solution, the pushing block group includes an upper pushing block group and a lower pushing block group, and the two are arranged at intervals up and down, the upper pushing block group includes a plurality of upper pushing blocks symmetrically arranged about the axis of the pull rod, and the lower pushing block group includes a plurality of lower pushing blocks symmetrically arranged about the axis of the pull rod, the upper pushing blocks and the lower pushing blocks are alternately arranged in the circumferential direction of the pull rod, the length of the lower pushing block is greater than the length of the upper pushing block, the front and rear side surfaces of the upper pushing block are respectively a vertical surface and a first inclined surface, the first inclined surface is inclined downward in the direction from front to back, the front and rear side surfaces of the lower pushing block are respectively a vertical surface and a second inclined surface, and the second inclined surface is inclined upward in the direction from front to back.

[0006] To further optimize the present technical solution, the pushing assembly includes a first column and a second column, the length of the second column is greater than that of the first column, the lower end of the first column is provided with a first push rod which can act with the first inclined surface when the slider descends to thereby rotate the pull rod to a set angle, and the lower end of the second column is provided with a second push rod which can act with the second inclined surface when the slider rises to thereby push the pull rod to rotate to a set angle.

[0007] To further optimize the technical solution, a support plate is provided on the pull rod below the lower push block group.

[0008] Compared with the prior art, the utility model has the following advantages: a seat block is provided at one end of the first pin shaft, and the seat block is rotatably connected to a pull rod, one end of the crossbeam is rotatably connected to a clamp body, the slider is slidably connected to the crossbeam and the pull rod at the same time, a plurality of channels are provided on the circumference of the guide hole, a blocking block and a pushing block group are provided on the pull rod, the pushing assembly on the slider can interact with the pushing block group to rotate the pull rod and thereby enable and prevent the blocking block from passing through the channel respectively when the workpiece is lifted and after the workpiece is lowered, so that after the workpiece is lowered, no human intervention is required to avoid the two grabbing sections from re-clamping the workpiece, which is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The figure is a schematic diagram of the structure of a forging tong.

[0010] Figure 2 for Figure 1 Magnified view of point I in the middle.

[0011] Figure 3 This is a schematic diagram of the structure of the slider.

[0012] In the figure: 1, right clamp body; 2, left clamp body; 3, connecting plate; 4, hanging plate; 5, first pin shaft; 6, second pin shaft; 7, third pin shaft; 8, fourth pin shaft; 9, cross beam; 10, guide block; 11, seat block; 12, slider; 121, guide hole; 122, channel; 123, first column; 124, first push rod; 125, second push rod; 126, second column; 13, pull rod; 131, blocking block; 132, upper push block group; 133, lower push block group; 134, support plate. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0014] Specific implementation method: Combination Figure 1-3 As shown, a forging tongs comprises a right tongs body 1 and a left tongs body 2, and the middle parts of the two tongs are hinged by a first pin 5, one end of the right tongs body 1 is hinged to the end of a connecting plate 3 by a fourth pin 8, one end of the left tongs body 2 is hinged to the end of another connecting plate 3 by a second pin 6, and the other ends of the two connecting plates 3 are hinged to the lower end of the hanging plate 4 by a third pin 7 at the same time. A seat block 11 is provided at one end of the first pin shaft 5. Although the first pin shaft 5 can rotate, in order to make the seat block 11 easier to rotate, it is preferred that the seat block 11 is rotatably connected to the first pin shaft 5. The top of the seat block 11 is rotatably connected to a pull rod 13. One end of the crossbeam 9 is rotatably connected to one of the right clamp body 1 and the left clamp body 2. In fact, the crossbeam 9 can be fixedly connected or rotatably connected to the second pin shaft 6. Of course, the crossbeam 9 can also be rotatably connected to other parts of the clamp body located above the first pin shaft 5. The other one of the right clamp body 1 and the left clamp body 2 is rotatably connected to a guide block 10 slidably connected to the crossbeam 9. The crossbeam 9 is slidably connected to a slider 12, and the slider 12 is provided with a guide hole perpendicular to the extension direction of the crossbeam 9. 121, the pull rod 13 is slidably connected with the guide hole 121, the guide block 10 and one end of the cross beam 9 are symmetrical about the pull rod 13, so that the pull rod 13 is always located on the symmetry plane of the tongs, and the pull rod 13 and the cross beam 9 are always perpendicular to each other. The circumference of the guide hole 121 is symmetrically provided with a plurality of channels 122 penetrating the upper and lower surfaces of the slider 12 about its axis, and the pull rod 13 is provided with a blocking block 131 and a pushing block group at the upper and lower positions of the slider 12, respectively. The bottom surface of the slider 12 is provided with a pushing component that can interact with the pushing block group to rotate the pull rod 13 so that the blocking block 131 can pass through the channel 122 when the workpiece is lifted, and cannot pass through the channel 122 after the workpiece is lowered. Combined with Figure 1 As shown, since the blocking block 131 can pass through the channel 122, the grasping sections on the two clamp bodies can approach each other when the hanging plate 4 is lifted to clamp the workpiece; when the workpiece is lowered, the blocking block 131 cannot pass through the channel 122, so that when the hanging plate 4 is lifted, the grasping sections will not approach each other, and the lifting clamp can be lifted to separate from the workpiece.

[0015] Furthermore, the pushing block group includes an upper pushing block group 132 and a lower pushing block group 133, and the two are arranged at an interval up and down. The upper pushing block group 132 includes a plurality of upper pushing blocks symmetrically arranged about the axis of the pull rod 13, and the number of the upper pushing blocks is twice the number of the channels 122. The lower pushing block group 133 includes a plurality of lower pushing blocks symmetrically arranged about the axis of the pull rod 13, and the number of the lower pushing blocks is also twice the number of the channels 122. The upper pushing blocks and the lower pushing blocks are alternately arranged in the circumferential direction of the pull rod 13, that is, in the circumferential direction of the pull rod 13, the lower pushing block is located between two adjacent upper pushing blocks, the length of the lower pushing block is greater than the length of the upper pushing block, and the front and rear side surfaces of the upper pushing block (in the rotation direction of the pull rod 13) are a vertical plane and a first inclined plane, respectively, and the first inclined plane is inclined downward in the direction from front to back. The front and rear side surfaces of the lower pushing block are a vertical plane and a second inclined plane, respectively, and the second inclined plane is inclined upward in the direction from front to back.

[0016] Furthermore, the pushing assembly includes a first column 123 and a second column 126, the length of the second column 126 is greater than the length of the first column 123, the lower end of the first column 123 is provided with a first push rod 124 that can act with the first inclined surface when the slider 12 descends to rotate the pull rod 13 to a set angle, and the set angle is one-fourth of the angle between two adjacent channels, and the lower end of the second column 126 is provided with a second push rod 125 that can act with the second inclined surface when the slider 12 ascends to push the pull rod 13 to rotate to a set angle, and the set angle is one-fourth of the angle between two adjacent channels. Taking the number of channels as four as an example, combined with Figure 2As shown, when the workpiece is lowered, before the workpiece contacts the ground, each blocking block 131 is aligned with a channel 122 respectively, and after the workpiece contacts the ground, the hanging plate 4 continues to descend, and the two pliers continue to open to the maximum after releasing the workpiece, so that the first push rod 124 contacts the first inclined surface downward, and when the first push rod 124 is located below the upper push block group 132 (and located above the lower push block group 133, it can be designed that when the two pliers can no longer open, the first push rod 124 is just located at this position), the pull rod 13 rotates counterclockwise by 22.5︒, and then the hanging plate 4 is lifted so that the second push rod 125 contacts the second inclined surface upward and pushes the pull rod 13 to continue to rotate 22.5︒, at this time the blocking block 131 is located in the middle of the two adjacent channels 122, and as the hanging plate 4 continues to be lifted, the slider 12 continues to move upward and contacts the blocking block 131, and at this time the two grabbing sections cannot continue to approach, and the hanging pliers can be lifted while the workpiece remains on the ground. When lifting the next workpiece, the hanging plate 4 descends so that the opened tongs fall on the workpiece, and the first push rod 124 pushes the pull rod 13 to rotate 22.5° counterclockwise. When the hanging plate 4 rises, the second push rod 125 pushes the pull rod 13 to rotate 22.5° counterclockwise, so that the blocking block 131 is aligned with the channel 122, so that the grabbing section can clamp the workpiece when the hanging plate 4 continues to rise.

[0017] Furthermore, the pull rod 13 is provided with a support plate 134 below the lower push block group 133. When the second column 126 contacts the support plate 134, the two clamp bodies cannot continue to open, so that the first column 123 will not collide with the lower push block group 133. The existence of the support plate 134 can make it more flexible and easy to design the positions of the two push block groups.

[0018] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A forging tongs, comprising a right tongs body (1) and a left tongs body (2), the middle parts of which are hingedly connected via a first pin (5), the ends of the two tongs bodies are respectively hingedly connected to one end of two connecting plates (3), and the other ends of the two connecting plates (3) are simultaneously hingedly connected to the lower end of a hanging plate (4), characterized in that: A seat block (11) is provided at one end of the first pin shaft (5), and a pull rod (13) located on a symmetrical plane of the lifting clamp is rotatably connected to the top of the seat block (11), and the two clamp bodies are rotatably connected to the cross beam (9) and the guide block (10), respectively. The cross beam (9) is slidably connected to the guide block (10), and the slider (12) is slidably connected to the cross beam (9) and the pull rod (13) at the same time. A plurality of channels (122) are symmetrically provided on the circumference of the guide hole (121) on the slider (12) about its axis, and the pull rod (13) is provided with a blocking block (131) and a pushing block group at positions above and below the slider (12), respectively. The bottom surface of the slider (12) is provided with a pushing component that can interact with the pushing block group to rotate the pull rod (13), thereby enabling the blocking block (131) to pass through the channel (122) when the workpiece is lifted and after the workpiece is lowered.

2. A forging tongs according to claim 1, characterized in that: The pushing block group comprises an upper pushing block group (132) and a lower pushing block group (133), and the two are arranged at an interval in the upper and lower directions. The upper pushing block group (132) comprises a plurality of upper pushing blocks symmetrically arranged about the axis of the pull rod (13), and the lower pushing block group (133) comprises a plurality of lower pushing blocks symmetrically arranged about the axis of the pull rod (13). The upper pushing blocks and the lower pushing blocks are alternately arranged in the circumferential direction of the pull rod (13). The length of the lower pushing block is greater than that of the upper pushing block. The front and rear side surfaces of the upper pushing block are respectively a vertical surface and a first inclined surface, and the first inclined surface is inclined downward in a direction from front to back. The front and rear side surfaces of the lower pushing block are respectively a vertical surface and a second inclined surface, and the second inclined surface is inclined upward in a direction from front to back.

3. A forging tongs according to claim 2, characterized in that: The pushing assembly comprises a first column (123) and a second column (126), wherein the length of the second column (126) is greater than that of the first column (123), and the lower end of the first column (123) is provided with a first push rod (124) which can act with the first inclined surface when the slider (12) descends, thereby rotating the pull rod (13) to a set angle, and the lower end of the second column (126) is provided with a second push rod (125) which can act with the second inclined surface when the slider (12) ascends, thereby pushing the pull rod (13) to rotate to a set angle.

4. A forging tongs according to any one of claims 2 to 3, characterized in that: The pull rod (13) is provided with a support plate (134) at a position below the lower push block group (133).

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