Steel grabbing clamp and grabbing device

Abstract

The utility model relates to the technical field of steel grabbing, in particular to a steel grabbing clamp and a grabbing device. The steel grabbing clamp comprises a fixing plate, an electromagnet and a connecting piece, the electromagnet is installed on the fixing plate, one end of the connecting piece is connected with the fixing plate, and the other end of the connecting piece is detachably connected with a mechanical arm; the electromagnet comprises a magnet body and at least two magnet claw groups, the magnet body is provided with a mounting surface, and the two magnet claw groups are mounted on the mounting surface of the electromagnet; each magnet claw group comprises two magnet claws, a first contact surface and a second contact surface which are connected with each other are formed at one end, far away from the magnet body, of each magnet claw, and the first contact surfaces are parallel to the mounting surface. According to the steel grabbing clamp, flat steel and round bars can be effectively grabbed, the adaptive capacity is higher, and the flexibility is high.

Description

Technical Field

[0001] The utility model relates to the technical field of steel material grasping, and particularly relates to a steel material grasping clamp and a grasping device. Background Art

[0002] In the process of steel material processing, steel material clamps are often required. According to different shapes of steel materials, there are various types of clamps, such as flat steel clamps for grasping flat steel and round bar clamps for grasping round bars.

[0003] Currently, there is a lack of a clamp on the market that can adapt to both flat steel and round bars simultaneously. Summary of the Utility Model

[0004] (1) The problem to be solved by the utility model is: how to design a clamp that can adapt to both flat steel and round bars simultaneously.

[0005] (2) Technical Solution

[0006] A steel material grasping clamp includes a fixing plate, an electromagnet, and a connecting member. The electromagnet is installed on the fixing plate. One end of the connecting member is connected to the fixing plate, and the other end is detachably connected to a robotic arm.

[0007] The electromagnet includes a magnet body and at least two groups of magnet claw groups. The magnet body has an installation surface, and the two groups of magnet claw groups are installed on the installation surface of the electromagnet.

[0008] Each group of magnet claw groups includes two magnet claws. One end of each magnet claw away from the magnet body forms a connected first contact surface and a second contact surface. The first contact surface is parallel to the installation surface. The second contact surface of each magnet claw faces the other magnet claw, and the distance between the second contact surface of this magnet claw and the installation surface gradually decreases along the direction of this magnet claw pointing to the other magnet claw. A first included angle is formed between the second contact surface and the first contact surface of each magnet claw, and the first included angle is an obtuse angle.

[0009] The second contact surfaces of the two magnet claws in each group of magnet claw groups cooperate to form a V-shaped area for accommodating a round bar.

[0010] When the magnet claws adsorb flat steel, the surface of the flat steel contacts the first contact surface of the magnet claws and is adsorbed by the first contact surface. When the magnet claws adsorb a round bar, the round bar enters the V-shaped area and is adsorbed by the two second contact surfaces.

[0011] According to an embodiment of the present utility model, a notch is provided at one end of the magnet claw away from the magnet body. The notch has a connected notch side surface and a notch bottom surface, the notch side surface and the notch bottom surface are perpendicular to each other, the notch bottom surface is connected to the first contact surface and is perpendicular to the first contact surface;

[0012] A second included angle is formed between the second contact surface and the notch side surface, and the second included angle is an obtuse angle;

[0013] A third included angle is formed between the second contact surface and the notch bottom surface, and the third included angle is an acute angle.

[0014] According to an embodiment of the present utility model, both the first contact surface and the notch side surface are rectangular surfaces, the second contact surface is an L-shaped surface, and the notch bottom surface is a right trapezoidal surface.

[0015] According to an embodiment of the present utility model, the magnet claw is in the shape of a rectangular block, and the magnet claw has opposite top surface, bottom surface, first side surface and second side surface;

[0016] A fourth included angle is formed between the second contact surface and the first side surface, and the fourth included angle is an obtuse angle;

[0017] The notch side surface is respectively connected to the top surface and the second side surface, and the notch side surface, the second side surface and the top surface are perpendicular to each other; the first contact surface is respectively connected to the bottom surface and the second side surface, and the first contact surface, the bottom surface and the second side surface are perpendicular to each other.

[0018] According to an embodiment of the present utility model, at least one connecting rod is fixedly installed on one side of the magnet body away from the magnet claw, and the end of the connecting rod away from the magnet body is detachably connected to the fixing plate.

[0019] According to an embodiment of the present utility model, the end of the connecting rod away from the magnet body is provided with an external thread, and a fixing seat corresponding to the connecting rod is fixedly installed on the fixing plate through a bolt. The fixing seat includes a connected plate body and a pipe body. The plate body is fixed on one side of the fixing plate close to the magnet body, and the pipe body passes through the fixing plate;

[0020] The end of the connecting rod away from the magnet body sequentially passes through the plate body and the pipe body, and at least one nut is screwed on the end of the connecting rod away from the magnet body.

[0021] According to an embodiment of the present utility model, a spring is sleeved on each connecting rod, and the spring is located between the plate body and the magnet body.

[0022] According to an embodiment of the present utility model, the connecting member includes a fixing rod and a flange plate. One end of the fixing rod is fixed to the side of the fixing plate away from the magnet body, and the other end thereof is fixed to the flange plate. The flange plate is used for connecting with the robotic arm.

[0023] A steel material grasping device includes the above-mentioned steel material grasping fixture, a robotic arm, and a base. The robotic arm is installed on the base, and the steel material grasping fixture is detachably connected to the robotic arm.

[0024] The beneficial effects of the present utility model:

[0025] A steel material grasping fixture provided by the present utility model includes a fixing plate, an electromagnet, and a connecting member. The electromagnet is installed on the fixing plate. One end of the connecting member is connected to the fixing plate, and the other end thereof is detachably connected to the robotic arm. The electromagnet includes a magnet body and at least two groups of magnet claw groups. The magnet body has an installation surface, and the two groups of magnet claw groups are installed on the installation surface of the electromagnet. Each group of magnet claw groups includes two magnet claws. One end of the magnet claw away from the magnet body forms a connected first contact surface and a second contact surface. The first contact surface is parallel to the installation surface. The second contact surface provided on each magnet claw faces the other magnet claw, and the distance between the second contact surface provided on this magnet claw and the installation surface gradually decreases along the direction of this magnet claw pointing to the other magnet claw. A first included angle is formed between the second contact surface and the first contact surface of each magnet claw, and the first included angle is an obtuse angle. The second contact surfaces of the two magnet claws in each group of magnet claw groups cooperate to form a V-shaped area for accommodating a round bar. When the magnet claw adsorbs a flat steel, the surface of the flat steel contacts the first contact surface of the magnet claw and is adsorbed by the first contact surface. When the magnet claw adsorbs a round bar, the round bar enters the V-shaped area and is adsorbed by the two second contact surfaces.

[0026] When using this steel material grasping fixture, first connect one end of the connecting member to the robotic arm, and grasp the steel material by operating the robotic arm. When grasping a flat steel, drive the fixture close to the flat steel by operating the robotic arm, and make the first contact surface of the magnet claw fit to the top surface of the flat steel. Then, the electromagnet is energized to generate magnetic force to adsorb the flat steel on the first contact surface. When grasping a round bar, move the fixture to make the round bar enter the V-shaped area, and make the second contact surfaces of the two magnet claws fit to the surface of the round bar, that is, the round bar is located between the two magnet claws. Then, the electromagnet is energized to generate magnetic force to adsorb the flat steel on the second contact surface of the magnet claw.

[0027] It can be seen that this steel material grasping fixture can effectively grasp both flat steel and round bar, with stronger adaptability and higher flexibility. Description of the Drawings

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 The structural diagram provided for the second embodiment of the present invention;

[0030] Figure 2 The structural diagram of the steel grabbing fixture provided for the first embodiment of the present invention;

[0031] Figure 3 The front view of the magnet body and the first type of magnet claw provided for the first embodiment of the present invention;

[0032] Figure 4 The three-dimensional view of the magnet body and the first type of magnet claw provided for the first embodiment of the present invention;

[0033] Figure 5 The structural diagram of the second type of magnet claw in the steel grabbing fixture provided for the first embodiment of the present invention.

[0034] Icon: 1, base; 2, robotic arm; 3, fixture; 4, electromagnet; 401, terminal; 402, magnet claw; 403, first contact surface; 404, second contact surface; 405, notch side; 406, notch bottom surface; 5, fixing plate; 501, fixing rod; 502, flange; 6, connecting rod; 7, pipe body; 8, nut; 9, plate body; 10, flat steel. Specific embodiments

[0035] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] As Figures 2 - 5As shown in the figure, an embodiment of the present utility model provides a steel grabbing fixture, which includes a fixing plate 5, an electromagnet 4 and a connecting member. The electromagnet 4 is installed on the fixing plate 5. One end of the connecting member is connected to the fixing plate 5, and the other end is detachably connected to the robotic arm 2. The electromagnet 4 includes a magnet body and at least two groups of magnet claw groups. The magnet body has an installation surface, and the two groups of magnet claw groups are installed on the installation surface of the electromagnet 4. Each group of magnet claw groups includes two magnet claws 402. One end of the magnet claw 402 away from the magnet body forms a connected first contact surface 403 and second contact surface 404. The first contact surface 403 is parallel to the installation surface. The second contact surface 404 provided on each magnet claw 402 faces the other magnet claw 402, and the distance between the second contact surface 404 provided on this magnet claw 402 and the installation surface gradually decreases along the direction of this magnet claw 402 pointing to the other magnet claw 402. A first included angle is formed between the second contact surface 404 and the first contact surface 403 of each magnet claw 402, and the first included angle is an obtuse angle. The second contact surfaces 404 of the two magnet claws 402 in each group of magnet claw groups cooperate to form a V-shaped area for accommodating a round bar. When the magnet claw 402 adsorbs the flat steel 10, the surface of the flat steel 10 contacts the first contact surface 403 of the magnet claw 402 and is adsorbed by the first contact surface 403. When the magnet claw 402 adsorbs a round bar, the round bar enters the V-shaped area and is adsorbed by the two second contact surfaces 404.

[0038] In this embodiment, when using this steel grabbing fixture, first connect one end of the connecting member to the robotic arm 2, and grab the steel by operating the robotic arm 2. Further, as Figure 3 and Figure 4 shown, when grabbing the flat steel 10, drive the fixture 3 close to the flat steel 10 by operating the robotic arm 2, and make the first contact surface 403 of the magnet claw 402 fit to the top surface of the flat steel 10. Then, the electromagnet 4 is energized to generate magnetic force to adsorb the flat steel 10 on the first contact surface 403.

[0039] When grabbing a round bar, move the fixture 3 so that the round bar enters the V-shaped area, and make the second contact surfaces 404 of the two magnet claws 402 fit to the surface of the round bar, that is, the round bar is located between the two magnet claws 402. Then, the electromagnet 4 is energized to generate magnetic force to adsorb the flat steel 10 on the second contact surface 404 of the magnet claw 402.

[0040] It can be seen that the fixture 3 in this embodiment can effectively grab both the flat steel 10 and the round bar, with stronger adaptability and higher flexibility.

[0041] In this embodiment, the magnet body is in the shape of a rectangular block, its front surface is the installation surface, the magnet claws 402 are arranged on the front surface of the magnet body, and a wiring terminal 401 is installed on the top of the magnet body for connecting wires.

[0042] Further, in the magnet claw group, the second contact surface 404 provided on the first magnet claw 402 faces the second magnet claw 402, and the distance between the second contact surface 404 provided on the first magnet claw 402 and the mounting surface gradually decreases along the direction from the first magnet claw 402 to the second magnet claw 402. That is Figure 5 in, from the right side to the left side of the magnet claw 402, the distance between the second contact surface 404 of the magnet claw 402 and the mounting surface gradually decreases.

[0043] As a preferred embodiment, in this embodiment, the magnet claw 402 is in the shape of a rectangular block, but one corner of the magnet claw 402 is cut off to form a structure as Figure 5 shown. At this time, the magnet claw 402 has six faces, namely the top surface, the bottom surface, the back surface, the left side surface, the right side surface, the first contact surface 403 and the second contact surface 404. Among them, the left side surface, the second contact surface 404, the first contact surface 403 and the right side surface are connected in sequence. The first contact surface 403 is parallel to the back surface of the magnet claw 402. A first included angle is formed between the second contact surface 404 and the first contact surface 403, and the first included angle is an obtuse angle. An included angle is formed between the second contact surface 404 and the left side surface, and this included angle is also an obtuse angle.

[0044] In this way, when clamping the flat steel 10, the first contact surface 403 is a plane, so that the first contact surface 403 of the magnet claw 402 can perfectly fit onto the surface of the flat steel 10, thereby firmly adsorbing the flat steel 10. When clamping a round bar, the second contact surfaces 404 of two relatively arranged magnet claws 402 simultaneously fit onto the round bar, so that the round bar is located between the second contact surfaces 404 of the two magnet claws 402, thereby also being able to adsorb the round bar. It can be seen that the fixture 3 in this embodiment can effectively grasp the flat steel 10 and can also effectively grasp the round bar.

[0045] Further, in order to further improve the grasping stability, four magnet claws 402 are provided, and the four magnet claws 402 are respectively close to the four corners of the mounting surface of the magnet body.

[0046] During the use of the above-mentioned magnet claw 402, due to the large area of the first contact surface 403, when the flat steels 10 are adjacent in sequence, mis-grasping is likely to occur. For the convenience of understanding, an example is given here. When a plurality of flat steels 10 arranged side by side are conveyed to the vicinity of the robotic arm 2 by the conveyor, the robotic arm 2 moves the fixture 3 to grasp. However, since there are also flat steels 10 on the side of the flat steel 10 to be grasped, and the area of the first contact surface 403 is large, when grasping the flat steel 10 to be grasped, it is easy to adsorb to the adjacent flat steel 10.

[0047] To solve the above problem, further improvements are made on the basis of the magnet claw 402 in the above embodiment. Specifically, as Figure 3 and Figure 4As shown in, Figure 5 a notch is cut on the basis of the magnet claw 402 shown in Figure 5 . Specifically, a notch is vertically cut downward from the top surface at the front end of the magnet claw 402 to form Figure 4 the magnet claw 402 in Figure 4 .

[0048] At this time, the magnet claw 402 has a total of nine surfaces, namely the top surface, the bottom surface, the back surface, the left side surface, the second contact surface 404, the first contact surface 403, the notch bottom surface 406, the notch side surface 405, and the right side surface. Among them, the second contact surface 404 is an L-shaped surface, and the first contact surface 403 is a rectangular surface. The notch side surface 405 is a vertical surface. The notch side surface 405 is connected to the top surface and is perpendicular to the top surface. The notch side surface 405 is connected to the right side surface and is perpendicular to the right side surface. The notch side surface 405 is connected to the second contact surface 404, and the included angle formed between the notch side surface 405 and the second contact surface 404 is an obtuse angle.

[0049] The notch bottom surface 406 is adjacent to the notch side surface 405 and is perpendicular to the notch side surface 405. The notch bottom surface 406 is connected to the first contact surface 403 and is perpendicular to the first contact surface 403. One side of the notch bottom surface 406 is adjacent to the second contact surface 404, and the included angle formed between the notch bottom surface 406 and the second contact surface 404 is an acute angle. Further, the included angle formed between the first contact surface 403 and the second contact surface 404 is an obtuse angle.

[0050] In addition, the notch bottom surface 406 is a right trapezoidal surface, its hypotenuse is connected to the second contact surface 404, and its two right sides are respectively connected to the notch side surface 405 and the right side surface.

[0051] In this way, the areas of the first contact surface 403 and the second contact surface 404 are reduced, so that when clamping the flat steel 10 or the round bar, the probability of mis-suction can be reduced and the adsorption accuracy can be improved.

[0052] As a preferred embodiment, as Figure 4 shown, four magnet claws 402 are provided. In order to facilitate the description of the positional relationship of the four magnet claws 402, the four magnet claws 402 are respectively named the first magnet claw, the second magnet claw, the third magnet claw, and the fourth magnet claw. Among them, the first magnet claw and the second magnet claw are installed at positions close to the top on the front surface of the magnet body, and the first magnet claw and the second magnet claw are symmetrically arranged. The first magnet claw is displaced to the upper left corner of the front surface of the magnet body, and the second magnet claw is located at the upper right corner of the front surface of the magnet body. The third magnet claw and the fourth magnet claw are installed at positions close to the bottom on the front surface of the magnet body. The third magnet claw and the fourth magnet claw are symmetrically arranged. The third magnet claw is located at the lower right corner of the front surface of the magnet body, and the fourth magnet claw is located at the lower left corner of the front surface of the magnet body. Moreover, the first magnet claw and the fourth magnet claw are symmetrically arranged, and the second magnet claw and the third magnet claw are symmetrically arranged.

[0053] The purpose of such a setting is to make the first contact surfaces 403 in the four magnet claws gather together as much as possible, and also make the wider parts in the second contact surfaces 404 in the four magnet claws gather together as much as possible, so as to reduce the probability of misabsorption and improve the accuracy of adsorption.

[0054] Preferably, as Figure 2 shown, four connecting rods 6 are fixedly installed on the side of the magnet body away from the magnet claws 402. The ends of the connecting rods 6 away from the magnet body are provided with external threads. The four connecting rods 6 are respectively installed at the four corners on the back of the magnet body. The ends of the connecting rods 6 away from the magnet body are detachably connected to the fixing plate 5.

[0055] Furthermore, four mounting holes are respectively formed at the four corners of the fixing plate 5. A fixing seat is installed at each mounting hole. There are four fixing seats, which correspond to the connecting rods 6 one by one. The fixing seat includes a connected pipe body 7 and a plate body 9. A circular hole is formed in the plate body 9, and the circular hole is coaxially arranged with the pipe body 7. A screw hole is formed in the plate body 9. When installing the fixing seat, insert the pipe body 7 into the mounting hole on the fixing plate 5 and pass through the mounting hole so that the plate body 9 fits against the side of the fixing plate 5, and then use screws to fix the plate body 9 on the fixing plate 5.

[0056] When installing the electromagnet 4, first put a spring on each connecting rod 6 respectively, then align the connecting rod 6 with the fixing seat, and then insert the connecting rod 6 into the fixing seat. The connecting rod 6 sequentially passes through the plate body 9 and the pipe body 7. At this time, the spring is limited between the plate body 9 and the magnet body. Finally, install the nut 8 on the threaded end of the connecting rod 6.

[0057] The advantage of such a setting is that the fixing plate 5 and the electromagnet 4 are fixedly connected. When the force applied by the robotic arm 2 to drive the electromagnet 4 towards the steel is too large, the electromagnet 4 will drive the connecting rod 6 to move towards the direction close to the robotic arm 2, causing the spring to be compressed. The spring provides a buffering force, so as to play a better buffering role and avoid the force applied by the electromagnet 4 to the steel being too large and scratching the steel.

[0058] It should be noted that from Figure 2 the perspective, under normal circumstances, since the fixing plate 5 is connected to the robotic arm 2 and is fixed, the spring will give the electromagnet 4 an elastic force towards the right, causing the electromagnet 4 to move slightly towards the right, so that the nut 8 abuts against the end face of the pipe body 7. Since the nut 8 suspends the connecting rod 6 and the electromagnet 4, the electromagnet 4 will not be separated from the fixing plate 5 either. When the electromagnet 4 makes hard contact with the steel, the electromagnet 4 will drive the connecting rod 6 to move slightly towards the left, and the spring is compressed.

[0059] Preferably, as Figure 1 and Figure 2As shown in the figure, the connecting member includes a fixing rod 501 and a flange 502. One end of the fixing rod 501 is fixed to the side of the fixing plate 5 away from the magnet body, and the other end is fixed to the flange 502. A flange member is installed at the end of the robotic arm 2, and the flange 502 is connected to the flange member on the robotic arm 2 by bolts for easy disassembly.

[0060] Embodiment 2:

[0061] As Figure 1 shown in the figure, Embodiment 2 of the present utility model provides a steel material grasping device, which includes the steel material grasping fixture in Embodiment 1, a robotic arm 2, and a base 1. Among them, the robotic arm 2 is installed on the base 1, and the flange 502 in the steel material grasping fixture in Embodiment 1 is connected to the flange member at the end of the robotic arm 2.

[0062] Since this steel material grasping device uses the steel material grasping fixture in Embodiment 1, this steel material grasping device can grasp both round bars and flat steel 10.

[0063] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0064] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the connection inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, in the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0065] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A steel grabbing fixture, characterized in that: It comprises a fixing plate (5), an electromagnet (4) and a connecting piece, wherein the electromagnet (4) is mounted on the fixing plate (5), one end of the connecting piece is connected to the fixing plate (5), and the other end thereof is detachably connected to the mechanical arm (2); The electromagnet (4) comprises a magnet body and at least two groups of magnet claw groups, the magnet body has a mounting surface, and the two groups of magnet claw groups are mounted on the mounting surface of the electromagnet (4); Each group of the magnet claws comprises two magnet claws (402), and a first contact surface (403) and a second contact surface (404) connected to each other are formed at one end of the magnet claws (402) away from the magnet body, the first contact surface (403) is parallel to the mounting surface, the second contact surface (404) provided on each magnet claw (402) faces the other magnet claw (402), and the distance between the second contact surface (404) provided on the magnet claw (402) and the mounting surface gradually decreases along the direction from the magnet claw (402) to the other magnet claw (402); a first angle is formed between the second contact surface (404) and the first contact surface (403) of each magnet claw (402), and the first angle is an obtuse angle; The second contact surfaces (404) of the two magnet claws (402) in each group of magnet claws cooperate to form a V-shaped area, and the V-shaped area is used to accommodate a round rod; When the magnet claw (402) adsorbs the flat steel, the surface of the flat steel contacts the first contact surface (403) of the magnet claw (402) and is adsorbed by the first contact surface (403); when the magnet claw (402) adsorbs the round rod, the round rod enters the V-shaped area and is adsorbed by the two second contact surfaces (404).

2. A steel material grabbing fixture according to claim 1, characterized in that: A notch is provided at one end of the magnet claw (402) away from the magnet body, the notch having a notch side surface (405) and a notch bottom surface (406) connected to each other, the notch side surface (405) and the notch bottom surface (406) being perpendicular to each other, and the notch bottom surface (406) being connected to the first contact surface (403) and perpendicular to the first contact surface (403); A second angle is formed between the second contact surface (404) and the notch side surface (405), and the second angle is an obtuse angle; A third angle is formed between the second contact surface (404) and the notch bottom surface (406), and the third angle is an acute angle.

3. A steel material grabbing fixture according to claim 2, characterized in that: The first contact surface (403) and the notch side surface (405) are both rectangular surfaces, the second contact surface (404) is an L-shaped surface, and the notch bottom surface (406) is a right-angled trapezoidal surface.

4. A steel material grabbing fixture according to claim 3, characterized in that: The magnet claw (402) is in a rectangular block shape, and has a top surface, a bottom surface, a first side surface and a second side surface that are opposite to each other; A fourth angle is formed between the second contact surface (404) and the first side surface, and the fourth angle is an obtuse angle; The notch side surface (405) is connected to the top surface and the second side surface respectively, and the notch side surface (405), the second side surface and the top surface are perpendicular to each other; the first contact surface (403) is connected to the bottom surface and the second side surface respectively, and the first contact surface (403), the bottom surface and the second side surface are perpendicular to each other.

5. The steel material grabbing fixture according to claim 1, characterized in that: At least one connecting rod (6) is fixedly mounted on a side of the magnet body away from the magnet claw (402), and an end of the connecting rod (6) away from the magnet body is detachably connected to the fixing plate (5).

6. A steel material grabbing fixture according to claim 5, characterized in that: An end of the connecting rod (6) away from the magnet body is provided with an external thread, and a fixing seat corresponding to the connecting rod (6) is fixedly mounted on the fixing plate (5) by means of bolts, and the fixing seat comprises a plate body (9) and a tube body (7) connected to each other, the plate body (9) is fixed to a side of the fixing plate (5) close to the magnet body, and the tube body (7) passes through the fixing plate (5); One end of the connecting rod (6) away from the magnet body passes through the plate body (9) and the tube body (7) in sequence, and one end of the connecting rod (6) away from the magnet body is threadedly connected with at least one nut (8).

7. A steel material grabbing fixture according to claim 6, characterized in that: Each of the connecting rods (6) is sleeved with a spring, and the spring is located between the plate body (9) and the magnet body.

8. The steel material grabbing fixture according to claim 1, characterized in that: The connecting member comprises a fixing rod (501) and a flange (502), one end of the fixing rod (501) is fixed to a side of the fixing plate (5) away from the magnet body, and the other end of the fixing rod (501) is fixed to the flange (502), and the flange (502) is used to connect to the mechanical arm (2).

9. A steel material grabbing device, characterized in that: It comprises a steel material grabbing fixture as described in any one of claims 1 to 8, a mechanical arm (2) and a base (1), wherein the mechanical arm (2) is mounted on the base (1), and the steel material grabbing fixture is detachably connected to the mechanical arm (2).

Images