Automatically grab and release the spreader

Abstract

The present invention provides a sling with automatic grabbing and releasing, and relates to the technical field of slings. The box of the sling with automatic grabbing and releasing can be slidably installed on a column on a flat bottom weight plate, a double-sided toothed groove is provided on the side wall of the box, a pin shaft on the side wall of a cylindrical plug can be slidably connected in the double-sided toothed groove, an anchor hook is connected to the bottom of the cylindrical plug, a hanging beam plate is installed on the column and is located below the box, and a strip slot hole for the anchor hook to pass through is provided, one end of the clamp is hinged on the outside of the box, and the middle part of the clamp is hinged on the outside of the flat bottom weight plate, a hanger on the box is used to be lifted or lowered by a crane to drive the clamp to open or tighten, and the pin shaft slides in the double-sided toothed groove to drive the anchor hook to clamp below the hanging beam plate or pass through the strip slot hole. The sling can automatically grab and release the workpiece, and has a simple structure and low maintenance cost, and can adapt to operations in various environments.

Description

Technical Field

[0001] The present invention relates to the technical field of slings, and in particular to an automatic grabbing and releasing sling. Background Art

[0002] At present, manufacturing companies mostly use special lifting devices such as clamps or suction cups when lifting and transporting workpieces. Special lifting devices generally require external power devices (such as motors, electromagnetic devices, pneumatic cylinders, hydraulic cylinders and other auxiliary equipment) to be used in conjunction with the lifting devices to complete the manual operation process. They have high requirements on the on-site environment and large operating space. At the same time, the assembly structure is complex and the maintenance cost is also high. During use, the purpose of fully automatic lifting cannot be achieved. Therefore, the work efficiency cannot be significantly improved during use, and the labor cost is increased.

[0003] How to design a workpiece lifting device with low cost, high efficiency and wide application range has always been the goal of technical personnel in this field. Summary of the invention

[0004] The purpose of the present invention includes providing an automatic grabbing and releasing sling, which can automatically grab and release a workpiece, has a simple structure, low maintenance cost, and can be adapted to work in various environments.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides an automatic grabbing and releasing sling, the automatic grabbing and releasing sling comprising a flat bottom weight plate, a column, a box, a hanger, a cylindrical plug, a hook connecting rod, an anchor hook, a hanging beam plate and a clamping claw;

[0007] The column is installed on the flat bottom weight plate, the box body can be slidably installed on the column, the hanger is connected to the top of the box body, the side wall of the box body is provided with a double-sided toothed groove, the side wall of the cylindrical plug is provided with a pin shaft, the pin shaft can be slidably connected in the double-sided toothed groove, the anchor hook is connected to the bottom of the cylindrical plug through the hook connecting rod, the hanging beam plate is installed on the column and is located below the box body, the hanging beam plate is provided with a strip slot hole for the anchor hook to pass through, one end of the clamping claw is hinged on the outer side of the box body, the middle part of the clamping claw is hinged on the outer side of the flat bottom weight plate, and the other end of the clamping claw is located below the flat bottom weight plate for grabbing or releasing the workpiece;

[0008] Among them, the hanger is used to be lifted or lowered by the crane to drive the box to move up and down along the column, and drive the clamping claws to open or tighten, and the pin shaft to slide in the double-sided toothed groove to drive the anchor hook to be clamped under the hanging beam plate or pass through the strip slot.

[0009] In an optional embodiment, the box body includes an upper toothed guide sleeve and a lower toothed guide sleeve, the upper toothed guide sleeve is provided with an upper tooth shape on one side close to the lower toothed guide sleeve, and the lower tooth shape is provided with a lower tooth shape on one side close to the upper toothed guide sleeve, and the upper tooth shape cooperates with the lower tooth shape to form a double-sided toothed groove.

[0010] In an optional embodiment, the tooth tops and tooth bottoms of the upper tooth profile are offset from the tooth tops and tooth bottoms of the lower tooth profile.

[0011] In an optional embodiment, there are two pins, the two pins are centrally symmetrical about the center line of the cylindrical piston, the upper teeth are centrally symmetrical about the center line of the box body, and the lower teeth are centrally symmetrical about the center line of the box body.

[0012] In an optional embodiment, the tooth profile line between adjacent tooth tops and tooth bottoms on the upper tooth profile or the lower tooth profile is used to drive the pin shaft to rotate 45°.

[0013] In an optional embodiment, the upper tooth profile and the lower tooth profile each include four tooth bottoms and four tooth tops. In the process of the hanger driving the box to move up and down, the upper tooth profile and the lower tooth profile alternately push the pin shaft to rotate. In the process of the pin shaft rotating one circle, the upper tooth profile and the lower tooth profile respectively push the pin shaft four times.

[0014] In an optional embodiment, the lower tooth profile includes a tooth bottom a1, a tooth top b1, a tooth bottom c1, a tooth top d1, a tooth bottom e1, a tooth top f1, a tooth bottom g1 and a tooth top h1 which are connected end to end in sequence by a tooth profile line, and the upper tooth profile includes a tooth bottom a2, a tooth top b2, a tooth bottom c2, a tooth top d2, a tooth bottom e2, a tooth top f2, a tooth bottom g2 and a tooth top h2 which are connected end to end in sequence by a tooth profile line, and along the extension direction of the double-sided tooth profile groove, the arrangement order of each tooth top and tooth bottom is: tooth bottom a1, tooth top b1, tooth bottom a2, tooth top b2, tooth bottom c1, tooth top d1, tooth bottom c2, tooth top d2, tooth bottom e1, tooth top f1, tooth bottom e2, tooth top f2, tooth bottom g1, tooth top h1, tooth bottom g2 and tooth top h2.

[0015] In an optional embodiment, when the pin is located at the tooth bottom a1, the anchor hook is located below the hanging beam plate and is perpendicular to the strip slot hole. When the pin is located at the tooth bottom a2, the anchor hook is located below the hanging beam plate and the angle between it and the strip slot hole is 45°. When the pin is located at the tooth bottom c1, the anchor hook is parallel to the strip slot hole and can pass through the strip slot hole. When the pin is located at the tooth bottom c2, the anchor hook is located below the hanging beam plate and the angle between it and the strip slot hole is 45°. It is 45°. When the pin shaft is located at the tooth bottom e1, the anchor hook is located below the hanging beam plate and is perpendicular to the strip slot. When the pin shaft is located at the tooth bottom e2, the anchor hook is located below the hanging beam plate and the angle between it and the strip slot is 45°. When the pin shaft is located at the tooth bottom g1, the anchor hook is parallel to the strip slot and can pass through the strip slot. When the pin shaft is located at the tooth bottom g2, the anchor hook is located below the hanging beam plate and the angle between it and the strip slot is 45°.

[0016] In an optional embodiment, the tooth profiles of the upper tooth shape and the lower tooth shape both adopt smooth transition curves.

[0017] In an optional embodiment, a T-shaped stopper is provided on the top of the column, and the T-shaped stopper is used to prevent the box from moving upward and separating from the column.

[0018] The beneficial effects of the automatic grabbing and releasing sling provided by the embodiment of the present invention include:

[0019] 1. When the anchor hook slides up or down on the column through the box, it can rotate up and down relative to the hanging beam plate, forming a form of hooking and unhooking with the hanging beam plate; when the anchor hook is hooked with the hanging beam plate, the clamp automatically grabs the workpiece; when the anchor hook is unhooked from the hanging beam plate, the clamp automatically releases the workpiece. The rotation of the anchor hook is achieved by the double-sided toothed groove on the box body pushing the pin shaft, and the design is simple and ingenious;

[0020] 2. No manual labor or external power device is required, and the workpiece can be automatically grasped and released by its own gravity. It is particularly suitable for harsh environments such as high temperature that operators cannot reach, as well as places with narrow lifting space. At the same time, the designed lifting device has simple structure, easy operation, convenient maintenance, high work efficiency and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1A schematic diagram of the structure of a lifting device for automatic grabbing and releasing provided by an embodiment of the present invention;

[0023] Figure 2 for Figure 1 The structural diagram of some parts in the figure;

[0024] Figure 3 for Figure 2 Top view of the part;

[0025] Figure 4 for Figure 1 The structural diagram of some parts in the figure;

[0026] Figure 5 It is a structural diagram of the box and the hanger;

[0027] Figure 6 for Figure 5 Top view of the part in the figure;

[0028] Figure 7 It is a schematic diagram of the structure of the automatically grasped and released spreader in the released state;

[0029] Figure 8 It is a structural schematic diagram of the automatic grabbing and releasing spreader in the grabbing state;

[0030] Fig. 9 It is a schematic diagram of the development of the double-sided tooth groove.

[0031] Icons: 100-automatic grabbing and releasing sling; 1-flat bottom weight plate; 2-column; 3-T-shaped block; 4-upper plate; 5-lower plate; 6-straight round hole; 7-rib plate; 8-upper toothed guide sleeve; 9-lower toothed guide sleeve; 10-double-sided toothed groove; 11-hanger; 12-cylindrical plug; 13-pin shaft; 14-hook connecting rod; 15-anchor hook; 16-nut; 17-beam plate; 18-strip slot; 19-connecting rod; 20-claw; 21-articulated seat; 22-concave slide. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0037] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0038] Please refer to Figures 1 to 3 The present embodiment provides an automatic grabbing and releasing sling 100, which includes a flat bottom weight plate 1, a column 2, a T-shaped block 3, a box body, a hanger 11, a cylindrical plug 12, a hook connecting rod 14, an anchor hook 15, a nut 16, a hanging beam plate 17 and a clamp.

[0039] The column 2 is H-shaped and is mounted on the flat bottom plate 1. The box body is mounted on the column 2 so as to slide up and down. The sides of the box body are respectively provided with concave slide grooves 22 that slide in accordance with the column 2. A T-shaped stopper 3 is arranged on the top of the column 2 to prevent the box body from moving upward and away from the column 2.

[0040] The box body includes an upper plate 4, a lower plate 5, a rib plate 7 and an intermediate sleeve, wherein the intermediate sleeve includes an upper toothed guide sleeve 8 and a lower toothed guide sleeve 9, and both the upper toothed guide sleeve 8 and the lower toothed guide sleeve 9 are cylindrical structures. The rib plate 7 is connected between the upper plate 4 and the lower plate 5 to strengthen the connection strength, the upper toothed guide sleeve 8 is connected to the bottom surface of the upper plate 4, and the lower toothed guide sleeve 9 is connected to the top surface of the lower plate 5. The upper toothed guide sleeve 8 is provided with an upper toothed shape on one side close to the lower toothed guide sleeve 9, and the lower toothed guide sleeve 9 is provided with a lower toothed shape on one side close to the upper toothed guide sleeve 8. The upper toothed shape and the lower toothed shape are spaced and matched to form a double-sided toothed groove 10, and the tooth profiles of the upper toothed shape and the lower toothed shape are both smooth transition curves. The upper toothed shape is centrally symmetrical about the center line of the box body, and the lower toothed shape is centrally symmetrical about the center line of the box body. The tooth top and tooth bottom of the upper toothed shape are staggered with the tooth top and tooth bottom of the lower toothed shape.

[0041] The upper plate 4 and the lower plate 5 are also provided with a straight through circular hole 6 for the intermediate sleeve to pass through (see Figure 5 and Figure 6 ).

[0042] See also Figure 1 and Figure 4 A pin shaft 13 is arranged on the side wall of the cylindrical plug 12. There are two pin shafts 13. The two pin shafts 13 are centrally symmetrical about the center line of the cylindrical plug 12. The anchor hook 15 is connected to the bottom of the cylindrical plug 12 through the hook connecting rod 14. The nut 16 is connected to one end of the hook connecting rod 14 passing through the cylindrical plug 12 to ensure that the cylindrical plug 12 is firmly connected to the hook connecting rod 14.

[0043] The hanging beam plate 17 is installed on the column 2 and is located below the box body. The hanging beam plate 17 is provided with a strip slot 18 for the anchor hook 15 to pass through.

[0044] See also Figure 1 The clamp includes a connecting rod 19 and a clamp claw 20 that are connected to each other. One end of the connecting rod 19 is hinged to the rib plate 7, and the other end of the connecting rod 19 is hinged to one end of the clamp claw 20. The middle part of the clamp claw 20 is hinged to the outside of the flat bottom weight plate 1 through a hinge seat 21. The other end of the clamp claw 20 is located below the flat bottom weight plate 1 for grabbing or releasing the workpiece.

[0045] The hanger 11 is used to be lifted or lowered by the crane to drive the box to move up and down along the column 2 and drive the clamping claw to open (see Figure 7 ) or tighten (see Figure 8 ), and the pin shaft 13 slides in the double-sided toothed groove 10 to drive the anchor hook 15 to be clamped under the hanging beam plate 17 or pass through the strip slot 18.

[0046] See also Fig. 9The upper tooth profile and the lower tooth profile each include four tooth bottoms and four tooth tops. When the hanger 11 drives the box to move up and down, the upper tooth profile and the lower tooth profile alternately push the pin 13 to rotate. When the pin 13 rotates one circle, the tooth profile line between the adjacent tooth tops and tooth bottoms on the upper tooth profile or the lower tooth profile is used to push the pin 13 to rotate 45°. The upper tooth profile and the lower tooth profile push the pin 13 four times respectively.

[0047] Specifically, the lower tooth profile includes a tooth bottom a1, a tooth top b1, a tooth bottom c1, a tooth top d1, a tooth bottom e1, a tooth top f1, a tooth bottom g1 and a tooth top h1 connected end to end in sequence by a tooth profile line, and the upper tooth profile includes a tooth bottom a2, a tooth top b2, a tooth bottom c2, a tooth top d2, a tooth bottom e2, a tooth top f2, a tooth bottom g2 and a tooth top h2 connected end to end in sequence by a tooth profile line, and along the extension direction of the double-sided tooth groove 10, the arrangement order of each tooth top and tooth bottom is: tooth bottom a1, tooth top b1, tooth bottom a2, tooth top b2, tooth bottom c1, tooth top d1, tooth bottom c2, tooth top d2, tooth bottom e1, tooth top f1, tooth bottom e2, tooth top f2, tooth bottom g1, tooth top h1, tooth bottom g2 and tooth top h2.

[0048] There is a one-to-one correspondence between the position of the pin 13 in the double-sided toothed groove 10 and the angle between the anchor hook 15 and the strip slot 18, as shown in the following table:

[0049]

[0050] Among them, it can be understood that the anchor hook 15 rotates in a single direction relative to the strip slot 18, starting from the position of the tooth bottom a1, the anchor hook 15 and the strip slot 18 change from being perpendicular to each other to overlapping with each other (the position of the tooth bottom c1), and the anchor hook 15 continues to rotate in the original rotation direction, and the angle with the strip slot 18 gradually increases until the position of the tooth bottom e1, the anchor hook 15 and the strip slot 18 are perpendicular to each other, and then the angle between the two is reduced. After the anchor hook 15 passes the tooth bottom g2, it circulates to the position of the tooth bottom a1, and repeats this process.

[0051] Specifically, the entire working process of the automatic grabbing and releasing spreader 100 is as follows:

[0052] When the crane lifts the hanger 11 and moves the automatically grasped and released hanger 100 toward the workpiece, the pin 13 is located at the tooth bottom a1, and the anchor hook 15 is located below the hanging beam plate 17 and perpendicular to the strip slot 18, so that the anchor hook 15 is hooked with the hanging beam plate 17, and the clamp is in a released state;

[0053] After the crane puts the automatically released lifting device 100 onto the workpiece, the crane releases the lifting force on the hanger 11, and the box moves downward as a whole under the action of its own gravity, and the double-sided toothed groove 10 also moves downward as a whole. The tooth profile h2a2 of the upper tooth shape pushes the pin shaft 13 to rotate. When the pin shaft 13 is located at the tooth bottom a2, the anchor hook 15 is located below the hanging beam plate 17, and the angle between it and the strip slot hole 18 is 45° (such as Figure 7 As shown), the hook and the beam plate 17 are still hooked;

[0054] After the crane lifts the automatically released lifting device 100 again, the double-sided toothed groove 10 moves upward as a whole, and the tooth profile b1c1 of the lower tooth shape pushes the pin 13 to rotate. When the pin 13 is located at the tooth bottom c1, the anchor hook 15 is parallel to the strip slot 18 and can pass through the strip slot 18 (such as Figure 8 As shown), the anchor hook 15 is unhooked from the hanging beam plate 17, so that the clamp automatically grabs the workpiece;

[0055] After the crane transfers the automatically captured and released sling 100 and the workpiece to the designated position, the crane releases the lifting force on the hanger 11, and the box moves downward as a whole under the action of its own gravity, and the double-sided toothed groove 10 also moves downward as a whole, and the tooth profile b2c2 of the upper tooth shape pushes the pin 13 to rotate. When the pin 13 is located at the tooth bottom c2, the anchor hook 15 is located below the hanging beam plate 17, and the angle between the anchor hook 15 and the strip slot 18 is 45°, so that the anchor hook 15 is hooked with the hanging beam plate 17, and the clamp releases the workpiece;

[0056] After the automatically grasped and released lifting device 100 releases the workpiece, the crane lifts the automatically grasped and released lifting device 100 again, and the double-sided toothed groove 10 moves upward as a whole, and the tooth profile line d1e1 of the lower tooth shape pushes the pin shaft 13 to rotate. When the pin shaft 13 is located at the tooth bottom e1, the anchor hook 15 is located below the hanging beam plate 17 and is perpendicular to the strip slot 18, so that the anchor hook 15 is hooked with the hanging beam plate 17, and the clamp remains in the released state;

[0057] The box body moves downward as a whole under the action of its own gravity, and the double-sided toothed groove 10 also moves downward as a whole. The tooth profile d2e2 of the upper tooth shape pushes the pin shaft 13 to rotate. When the pin shaft 13 is located at the tooth bottom e2, the anchor hook 15 is located below the hanging beam plate 17, and the angle between the anchor hook 15 and the strip slot hole 18 is 45°.

[0058] The crane lifts the automatically released lifting device 100 again, and the double-sided toothed groove 10 moves upward as a whole. The tooth profile e1g1 of the lower tooth pushes the pin 13 to rotate. When the pin 13 is located at the tooth bottom g1, the anchor hook 15 is parallel to the strip slot 18 and can pass through the strip slot 18.

[0059] The box moves downward as a whole under the action of its own gravity, and the double-sided toothed groove 10 also moves downward as a whole. The tooth profile e2g2 of the upper tooth pushes the pin 13 to rotate. When the pin 13 is located at the tooth bottom g2, the anchor hook 15 is located below the hanging beam plate 17, and the angle between it and the strip slot 18 is 45°.

[0060] It can be seen that the working principle of the automatic grabbing and releasing hanger 100 provided in this embodiment is: using the box to make an ascending or descending sliding motion on the column 2, and then each sliding of the box causes the pin shaft 13 to slide in the double-sided toothed groove 10, so that the cylindrical piston 12 rotates, and at the same time the anchor hook 15 will also extend, rotate and retract relative to the hanging beam plate 17, that is, the automatic grabbing and releasing hanger 100 is converted between the self-hanging, clamping and self-detaching states, thereby controlling the automatic grabbing and releasing hanger 100 to grasp or release the workpiece.

[0061] That is to say, when the automatic grabbing and releasing sling 100 provided in this embodiment grabs the workpiece, the crane is first used to hang the hanger 11 on the box, the flat-bottomed heavy plate 1 is first dropped on the workpiece, and the anchor hook 15 is hooked with the hanging beam plate 17, and then the box continues to be lowered. During the downward descending process, the anchor hook 15 is subjected to the gravity of the box so that the pin 13 on the cylindrical piston 12 is compressed and rotated by an angle; when the pin 13 hits the bottom of the upper tooth shape, the crane will be immediately lifted to pull up the box. During the rising process of the box, due to the deadweight of the anchor hook 15, when the pin 13 hits the lower tooth shape and slides down to a tooth bottom along the lower tooth shape, the anchor hook 15 is parallel to the strip slot 18. At this time, the crane continues to rise and pull up the box, and the anchor hook 15 passes through the strip slot 18. At the same time, as the box rises, the clamp is tightened inward to clamp the workpiece. When the workpiece is transferred to the designated placement position, the crane is operated in the same manner as above to control the box body up and down, rotate the anchor hook 15, and insert the anchor hook 15 into the bottom of the hanging beam plate 17 to form a vertical intersection with the strip slot 18.

[0062] The beneficial effects of the automatic grabbing and releasing sling 100 provided by the embodiment of the present invention include:

[0063] 1. When the anchor hook 15 slides upward or downward on the column 2 through the box, it can rotate up and down relative to the hanging beam plate 17, forming a form of hooking and unhooking with the hanging beam plate 17; when the anchor hook 15 is hooked with the hanging beam plate 17, the clamp automatically grabs the workpiece; when the anchor hook 15 is unhooked from the hanging beam plate 17, the clamp automatically releases the workpiece. The rotation of the anchor hook 15 is achieved by the double-sided toothed groove 10 on the box pushing the pin 13, and the design is simple and ingenious;

[0064] 2. No manual labor or external power device is required, and the workpiece can be automatically grasped and released by its own gravity. It is particularly suitable for harsh environments such as high temperature that operators cannot reach, as well as places with narrow lifting space. At the same time, the designed lifting device has simple structure, easy operation, convenient maintenance, high work efficiency and long service life.

[0065] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An automatic grab and release spreader, characterized in that: The automatic grabbing and releasing lifting device comprises a flat bottom weight plate (1), a column (2), a box body, a hanging frame (11), a cylindrical plug (12), a hook connecting rod (14), an anchor hook (15), a hanging beam plate (17) and a clamping claw; The column (2) is mounted on the flat bottom plate (1); the box body is mounted on the column (2) in a manner that it can slide up and down; the hanger (11) is connected to the top of the box body; a double-sided toothed groove (10) is provided on the side wall of the box body; a pin (13) is provided on the side wall of the cylindrical plug (12); the pin (13) is slidably connected to the double-sided toothed groove (10); the anchor hook (15) is connected to the hook connecting rod (14) The bottom of the cylindrical plug (12) is connected to the bottom of the cylindrical plug (12), the hanging beam plate (17) is installed on the column (2) and is located below the box body, and a strip slot (18) is provided on the hanging beam plate (17) for the anchor hook (15) to pass through. One end of the clamping claw is hinged on the outer side of the box body, and the middle part of the clamping claw is hinged on the outer side of the flat bottom weight plate (1). The other end of the clamping claw is located below the flat bottom weight plate (1) and is used to grab or release the workpiece; The hanger (11) is used to be lifted or lowered by a crane to drive the box to move up and down along the column (2) and drive the clamping claw to open or tighten, and the pin shaft (13) slides in the double-sided toothed groove (10) to drive the anchor hook (15) to be clamped under the hanging beam plate (17) or pass through the strip slot (18); The box body comprises an upper plate (4), a lower plate (5), a rib plate (7) and an intermediate sleeve, wherein the intermediate sleeve comprises an upper toothed guide sleeve (8) and a lower toothed guide sleeve (9), the upper toothed guide sleeve (8) is provided with an upper tooth profile on a side close to the lower toothed guide sleeve (9), the lower toothed guide sleeve (9) is provided with a lower tooth profile on a side close to the upper toothed guide sleeve (8), and the upper tooth profile cooperates with the lower tooth profile to form the double-sided toothed groove (10); The upper toothed guide sleeve (8) and the lower toothed guide sleeve (9) are both cylindrical structures; the rib plate (7) is connected between the upper plate (4) and the lower plate (5) to enhance the connection strength; the upper toothed guide sleeve (8) is connected to the bottom surface of the upper plate (4) and the lower toothed guide sleeve (9) is connected to the top surface of the lower plate (5); The lower tooth profile comprises a tooth bottom a1, a tooth top b1, a tooth bottom c1, a tooth top d1, a tooth bottom e1, a tooth top f1, a tooth bottom g1 and a tooth top h1 which are sequentially connected end to end by a tooth profile line, and the upper tooth profile comprises a tooth bottom a2, a tooth top b2, a tooth bottom c2, a tooth top d2, a tooth bottom e2, a tooth top f2, a tooth bottom g2 and a tooth top h2 which are sequentially connected end to end by a tooth profile line, and along the extension direction of the double-sided tooth profile groove (10), the arrangement order of the tooth tops and tooth bottoms is: tooth bottom a1, tooth top b1, tooth bottom a2, tooth top b2, tooth bottom c1, tooth top d1, tooth bottom c2, tooth top d2, tooth bottom e1, tooth top f1, tooth bottom e2, tooth top f2, tooth bottom g1, tooth top h1, tooth bottom g2 and tooth top h2; When the pin shaft (13) is located at the tooth bottom a1, the anchor hook (15) is located below the hanging beam plate (17) and is perpendicular to the strip slot (18); when the pin shaft (13) is located at the tooth bottom a2, the anchor hook (15) is located below the hanging beam plate (17) and the angle between the anchor hook (15) and the strip slot (18) is 45°; when the pin shaft (13) is located at the tooth bottom c1, the anchor hook (15) is parallel to the strip slot (18) and can pass through the strip slot (18); when the pin shaft (13) is located at the tooth bottom c2, the anchor hook (15) is located below the hanging beam plate (17) and the angle between the anchor hook (15) and the strip slot (18) is 45°. When the pin shaft (13) is located at the tooth bottom e1, the anchor hook (15) is located below the hanging beam plate (17) and is perpendicular to the strip slot (18); when the pin shaft (13) is located at the tooth bottom e2, the anchor hook (15) is located below the hanging beam plate (17) and the angle between the anchor hook (15) and the strip slot (18) is 45°; when the pin shaft (13) is located at the tooth bottom g1, the anchor hook (15) is parallel to the strip slot (18) and can pass through the strip slot (18); when the pin shaft (13) is located at the tooth bottom g2, the anchor hook (15) is located below the hanging beam plate (17) and the angle between the anchor hook (15) and the strip slot (18) is 45°; The upright post (2) is H-shaped, the upright post (2) is mounted on the flat bottom plate (1), the box body is mounted on the upright post (2) in a manner that allows the box body to slide up and down, and the sides of the box body are respectively provided with concave sliding grooves (22) that slide in cooperation with the upright post (2); The clamping jaw comprises a connecting rod (19) and a clamping jaw (20) which are connected to each other. One end of the connecting rod (19) is hinged on the rib plate (7), and the other end of the connecting rod (19) is hinged to one end of the clamping jaw (20). The middle part of the clamping jaw (20) is hinged to the outside of the flat bottom weight plate (1) through a hinge seat (21). The other end of the clamping jaw (20) is located below the flat bottom weight plate (1) and is used to grasp or release a workpiece.

2. The automatic grab and release spreader according to claim 1, characterized in that: The tooth top and tooth bottom of the upper tooth shape are staggered with the tooth top and tooth bottom of the lower tooth shape.

3. The automatic grab and release spreader according to claim 1, characterized in that: The number of the pin shafts (13) is two, the two pin shafts (13) are centrally symmetrical about the center line of the cylindrical piston (12), the upper tooth shape is centrally symmetrical about the center line of the box body, and the lower tooth shape is centrally symmetrical about the center line of the box body.

4. The automatic grab and release spreader according to claim 1, characterized in that: The tooth profiles of the upper tooth shape and the lower tooth shape both adopt smooth transition curves.

5. The automatic grab and release spreader according to claim 1, characterized in that: A T-shaped stopper (3) is provided on the top of the column (2), and the T-shaped stopper (3) is used to prevent the box from moving upward and detaching from the column (2).

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