CN116332007A

CN116332007A - Safe type automatic lifting appliance

Info

Publication number: CN116332007A
Application number: CN202310293411.3A
Authority: CN
Inventors: 赵小琴
Original assignee: Liyang Yongheng Heattreatment Co ltd
Current assignee: Liyang Yongheng Heattreatment Co ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-06-27
Anticipated expiration: 2043-03-24
Also published as: CN116332007B

Abstract

The invention discloses a safe automatic lifting appliance, which comprises a centering shaft and an outer lifting hook arranged on the centering shaft. The safe automatic lifting appliance utilizes the steel chain to support and limit the outer lifting hook, and is matched with the arrangement of the outer cone, the unhooking disc and the inner clamping hook, when the inner clamping hook is matched with the outer cone, the steel chain is in a loose state, the bottoms of the three outer lifting hooks are folded inwards, when the lifting appliance descends to an inner hole or a cavity of a heavy object to be lifted, the bracket is supported and stopped by a workpiece, under the matching of the inner clamping hook, the outer cone and the unhooking disc, the centering shaft continues to move upwards to tighten the steel chain and tighten the outer lifting hook, so that the outer lifting hook radially outwards expands to clamp the heavy object and realize lifting, power driving is not needed to be arranged on the lifting appliance, and the safe, fast and stable automatic lifting of the workpiece is realized when the influence of high temperature is avoided when the high-temperature workpiece is lifted, and labor and time and labor are saved.

Description

Safe type automatic lifting appliance

Technical Field

The invention relates to the technical field of lifting appliances, and is used for lifting annular workpieces in a high-temperature environment, in particular to a safe automatic lifting appliance.

Background

The heat treatment is a metal heat processing technology for obtaining expected tissues and performances by heating, heat preservation and cooling means of materials in a solid state, when a workpiece with an annular inner cavity or an inner hole is taken out of a heating furnace, a travelling crane is often required to replace a lifting tool to lift the workpiece heated to the set temperature to a next processing station, when the lifting tool is conventionally used for lifting the workpiece in the heating furnace, a hydraulic cylinder and other power driving components are often required to be arranged on the lifting tool to lift the workpiece in the heating furnace, the lifting tool is used for clamping and lifting due to higher temperature of the heating furnace, the risk of power damage exists, and once the workpiece falls in the travelling crane moving process, safety accidents are easily caused.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a safe automatic lifting appliance, which solves the problems that the lifting appliance used by a conventional heating furnace is often required to use a power driving assembly and safety accidents are easy to occur.

In order to achieve the above purpose, the present invention provides the following technical solutions: the safe automatic lifting appliance comprises a centering shaft and three outer lifting hooks arranged on the centering shaft, wherein the outer circumference of the centering shaft is sleeved with an inner lining ring in a clamping manner, first groove rings are respectively arranged on the upper side and the lower side of the inner lining ring at the outer circumference of the centering shaft, gaskets are respectively sleeved on the upper side and the lower side of the inner lining ring at the outer circumference of the centering shaft, fastening bolts are connected onto the gaskets in a threaded manner, after penetrating through the gaskets, the fastening bolts extend into the first groove rings to limit the positions of the inner lining rings, three groups of brackets matched with the outer lifting hooks are fixedly welded on the outer circumference of the inner lining ring, hollow sliding sleeves, outer cone bodies and unhooking discs are sequentially sleeved on the outer circumference of the centering shaft from top to bottom, the outer cone bodies are fixedly connected with the centering shaft through the fastening bolts, second groove rings are arranged on the outer shaft of the centering shaft, stepped threaded holes are formed on the surface of the outer cone bodies, the bolt passes the ladder screw hole and extends to in the second recess ring, realizes the fixed to outer cone position, sliding connection between unhook dish and the centering shaft, the top fixedly connected with lug of hollow sliding sleeve, the periphery of hollow sliding sleeve is from last three first otic placode of fixedly connected with in proper order down and three second otic placode, and is three first otic placode evenly distributed and welded fastening is at hollow sliding sleeve periphery, fixed mounting has the steel chain between first otic placode and the outer lifting hook, and is three second otic placode evenly distributed and welded fastening is at hollow sliding sleeve periphery, the rotation is provided with interior pothook on the second otic placode, interior pothook cooperatees with outer cone and unhook dish and uses, and the concave notch with interior pothook looks adaptation is seted up to the bottom of outer cone, and the internal surface of concave notch looks adaptation with the surface of unhook dish.

Through adopting above-mentioned technical scheme, utilize the steel chain to support spacing to outer lifting hook, cooperation outer cone, unhook dish and interior pothook's setting, when interior pothook and outer cone cooperation, the steel chain is in the relaxation state, outer lifting hook is under the effect of eccentric gravity, three outer lifting hook bottoms draw in inwards, when the hoist descends to waiting to rings shape heavy object hole or intracavity contact, the support is static by the work piece support, the fixed plate drives the centering shaft and upwards moves, interior pothook moves down to unhook dish below, use driving control hoist to rise, interior pothook is under the effect of skew focus, drive unhook dish upwards move and laminating with outer cone, because outer cone and support and centering shaft are in the state of rest, the kinetic energy is produced with interior pothook and outer cone to the collision, interior pothook swings outside the centering shaft and separates, centering shaft continues to upwards move thereby taut the steel chain and taut outer lifting hook, realize outwards opening the clamp heavy object along the radial direction and realize getting, need not set up the drive on the hoist, high temperature work piece's automatic influence has also been avoided in the hoist, safety and stability, and time saving the work piece of taking is fast and stable.

The invention is further provided with: the support comprises two fixing plates, the outer lifting hooks are rotatably arranged between the two fixing plates through pin shafts, the two fixing plates are provided with horizontal sliding grooves on the front faces, the top and the bottom of each horizontal sliding groove are provided with arc grooves, the number of the arc grooves is provided with a plurality of arc grooves, the upper arc grooves and the lower arc grooves are vertically and correspondingly arranged, each pin shaft comprises an annular end and a pin end, the annular ends and the pin ends are integrally formed, notches matched with the horizontal sliding grooves are formed in the top and the bottom of each pin end, pin holes are formed in the notches far away from one side of the annular ends, the pins penetrate through the pins to limit the pins, and the notches matched with the horizontal sliding grooves are formed in the top and the bottom of each pin end.

The invention is further provided with: one side fixedly connected with card frame of another fixed plate is kept away from to a set of fixed plate in the support, slidable mounting has the locking piece between card frame and the fixed plate, a plurality of regulation mouth has been seted up at the top of card frame, and the vertical corresponding setting of regulation mouth and circular arc groove, the top fixedly connected with of locking piece one side and the regulating block of regulation mouth looks adaptation, the bottom fixedly connected with stopper of locking piece one side, the top and the bottom of annular end all set up to plane portion, and the U type draw-in groove with annular end looks adaptation has been seted up to the bottom of locking piece, the through-hole has been seted up in proper order from last to lower on the surface of outer lifting hook.

Through adopting above-mentioned technical scheme, utilize the setting of round pin axle, horizontal spout and circular arc groove, utilize the locking piece to carry out axial and circumferential dual definition to the round pin axle, when avoiding axial float and the circumferential direction of round pin axle, guarantee the stability that round pin axle and outer lifting hook are connected, simultaneously under the cooperation setting of regulating block and regulation mouth, make the locking piece can conveniently break away from the annular end, and then can carry out position control after making the annular end rotate, later with the locking piece cover on the annular end after, accomplish the position definition to the annular end promptly, when convenience safe in utilization, make the interval between three outer lifting hook adjustable, and a structure is simple, can adapt to the work piece of multiple bore and hang and get.

The invention is further provided with: the bottom outside the inner clamping hook is fixedly connected with a balancing weight through a bolt.

Through adopting above-mentioned technical scheme, utilize the focus and the gravity of balancing weight and interior pothook and the relative axial motion of outer cone and unhook dish, the collision is strikeed and is realized fast separation and reunion, and then for the hoist provides safe and stable support to the hoist of work piece.

The invention is further provided with: the support fixing piece comprises a left half plate, a right half plate and a fastening plate, wherein the left half plate and the right half plate are fixedly connected through the fastening plate, an upper block, a middle block and a lower block are sequentially and fixedly connected to one side, opposite to the left half plate and the right half plate, of the left half plate from top to bottom, the upper block is arranged at the top of the fixing plate, the lower block is arranged at the bottom of the fixing plate, the middle block is matched with the horizontal sliding groove for use, and one end of the middle block is fixedly connected with an anti-slip clamping head matched with the circular arc groove.

Through adopting above-mentioned technical scheme, under the cooperation of left half board, right half board and fastening plate, make the support mounting can be convenient assemble between two fixed plates, while simple to operate, utilize the cooperation of upper position piece, middle position piece and lower position piece, strengthen spacing to the position of fixed plate, under the cooperation of anti-slip chuck, when guaranteeing that horizontal spout is overloaded when lifting by force behind the round pin axle position fixing, the non-deformable opens and causes the round pin axle displacement, produces the accident of work piece slippage.

In order to naturally generate the rotation torque of the folding hook by utilizing the offset and the gravity of the gravity center of the outer hanging hook and the shaft pin, so that the bottoms of the three outer hanging hooks are effectively closed, the invention is further provided with: the outer lifting hook is crooked form, and specifically, the through hole of outer lifting hook crank lower extreme and round pin end looks adaptation to adjust the different high size needs of outer lifting hook, the through hole that outer lifting hook crank upper end set up is used for supplying the steel chain assembly, supplies the steel chain to adjust different angles and adjusts different work piece tension needs.

In order to ensure the stability of the support structure, the invention is further provided with: reinforcing ribs are fixedly connected between two adjacent brackets.

The invention provides a safe automatic lifting appliance. The beneficial effects are as follows:

(1) According to the invention, the steel chain is used for supporting and limiting the outer lifting hook, the outer cone, the unhooking disc and the inner clamping hook are matched, when the inner clamping hook is matched with the outer cone, the steel chain is in a loose state, the outer lifting hook is separated from the outer cone under the action of eccentric gravity, the bottoms of the three outer lifting hooks are folded inwards, when the lifting tool descends to the inner hole or the cavity of a heavy object to be lifted, the support is supported and static by a workpiece, the fixed plate drives the centering shaft to move upwards, the inner clamping hook moves downwards to the lower part of the unhooking disc, the lifting tool is controlled to ascend by using a crane, the inner clamping hook drives the unhooking disc to move upwards and be jointed with the outer cone under the action of the offset gravity center, and the outer cone, the moving unhooking disc collides with the inner clamping hook and the outer cone to obtain kinetic energy due to the fact that the outer cone is in a static state, and the inner clamping hook swings outwards around the centering shaft to be separated from the lower end face of the outer cone, and the centering shaft continues to move upwards, so that the steel chain is tensioned and the outer lifting hook is stretched outwards in a radial direction to clamp the heavy object and realize the lifting, the lifting tool is not required to be driven by power, and the lifting tool is also realized when the lifting tool is lifted, the high-temperature workpiece is influenced, and the lifting tool is safe, and the lifting tool is realized, and the labor is saved, and is fast and stable.

(2) The invention utilizes the arrangement of the pin shaft, the horizontal sliding chute and the circular arc groove to limit the position of the pin shaft by utilizing the locking piece, ensures the stability of the connection of the pin shaft and the outer lifting hook while avoiding the rotation of the pin shaft, simultaneously ensures that the locking piece can be conveniently separated from the annular end under the matching arrangement of the adjusting block and the adjusting port, further ensures that the pin shaft can be axially moved to the other side and the annular end can be rotated for position adjustment, and then the pin shaft can be axially moved to the working position in the opposite direction and reversely rotated to be sleeved on the annular end, thereby completing the position limitation of the annular end.

(3) According to the invention, the supporting fixing piece can be conveniently assembled between the two fixing plates under the coordination of the left half plate, the right half plate and the fastening plate, the fixing plates are reinforced and limited by the coordination of the upper block, the middle block and the lower block, under the coordination of the anti-slip clamping head, when the supporting fixing piece slides on the horizontal sliding chute, the fixing plates can randomly slide in the sliding chute, when in operation, the spacing between the two fixing plates can be effectively limited, and accidents caused by the sliding of the shaft pin due to the expansion of the two fixing plates caused by deformation under the action of strong load are prevented, so that the safety is realized in the operation process.

Drawings

FIG. 1 is a top view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a top view of the mounting plate, cartridge and inner collar structure of the present invention;

FIG. 4 is a schematic view of the centering shaft and gasket of the present invention;

FIG. 5 is a left side view of the hollow runner structure of the present invention;

FIG. 6 is a schematic view of the structure of the outer hook of the present invention;

FIG. 7 is a schematic view of a pin according to the present invention;

FIG. 8 is a schematic connection diagram of the structure of the locking piece, the adjusting block, the limiting block and the U-shaped clamping groove of the invention;

FIG. 9 is a schematic view of the structure of the support fixture of the present invention;

in the figure, 1, centering shaft; 2. an outer hook; 3. a liner ring; 4. a bracket; 5. a hollow sliding sleeve; 6. an outer cone; 7. unhooking the dish; 8. lifting lugs; 9. a first ear plate; 10. a second ear plate; 11. a steel chain; 12. an inner hook; 13. reinforcing ribs; 14. a fixing plate; 15. a pin shaft; 16. a horizontal chute; 17. an arc groove; 18. a ring end; 19. a pin end; 20. anti-slip clamping heads; 21. a notch; 22. a clamping frame; 23. a locking piece; 24. an adjustment port; 25. an adjusting block; 26. a limiting block; 27. a U-shaped clamping groove; 28. a through hole; 29. balancing weight; 30. a support fixture; 31. a left half plate; 32. a right half plate; 33. a fastening plate; 34. an upper block; 35. a medium block; 36. lower block.

Description of the embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-9, the embodiment of the present invention provides a technical solution: the utility model provides an automatic hoist of safe type, from last to including hollow sliding sleeve 5 in proper order down, centering shaft 1 and interior lining 3, wherein the periphery of interior lining 3 is connected with outer lifting hook 2 through support 4 rotation, the periphery of hollow sliding sleeve 5 is from last three first otic placode 9 of fixedly connected in proper order down and three second otic placode 10, three first otic placode 9 evenly distributed and welded fastening are at hollow sliding sleeve 5 periphery, fixed mounting has steel chain 11 between first otic placode 9 and the outer lifting hook 2, utilize steel chain 11 to bear the part as hoist main effort, outer lifting hook 2 is crooked form, a plurality of through-hole 28 has been seted up in proper order from last to the surface of outer lifting hook 2.

As a detailed description, three groups of brackets 4 are welded and fixed on the periphery of the inner lining ring 3 at uniform intervals, and the same is true that the number of the outer hooks 2 is three, and the bottoms of the three outer hooks 2 are mutually close under the eccentric gravity effect, wherein in order to ensure the structural stability of the three groups of brackets 4, reinforcing ribs 13 are fixedly connected between two adjacent brackets 4.

As a preferred scheme, in order to cooperate the lift of driving, realize automatic hanging, three second otic placode 10 evenly distributed and welded fastening are in hollow sliding sleeve 5 periphery, rotate on the second otic placode 10 and are provided with interior pothook 12, and interior pothook 12 cooperatees with outer cone 6 and unhook dish 7 and use, wherein in order to guarantee effective contact between interior pothook 12 and outer cone 6 and unhook dish 7, the bottom outside interior pothook 12 is through bolt fixedly connected with balancing weight 29.

As a preferred scheme, in order to realize effective connection between outer lifting hook 2 and support 4, a set of support 4 includes two fixed plates 14, and outer lifting hook 2 rotates through round pin axle 15 and installs between two fixed plates 14, and horizontal spout 16 has all been seted up in the front of two fixed plates 14, and circular arc groove 17 has all been seted up to horizontal spout 16's top and bottom, and the quantity of circular arc groove 17 is provided with a plurality of, and two upper and lower circular arc groove 17 vertical corresponding settings.

In order to facilitate the adjustment of the position of the external lifting hook 2 and adapt to workpieces with different calibers, as shown in fig. 7, the pin shaft 15 comprises an annular end 18 and a pin end 19, the annular end 18 and the pin end 19 are integrally formed, notches 21 matched with the horizontal sliding groove 16 are formed at the top and the bottom of the pin end 19, and a pin hole is formed in the notch 21 at one side far away from the annular end 18.

As a preferred scheme, in order to guarantee the stability of outer lifting hook 2 in the use, carry out spacing to pin 15, specifically, one fixed plate 14 is kept away from the one side fixedly connected with clamping frame 22 of another fixed plate 14 in a set of support 4, slidable mounting has locking piece 23 between clamping frame 22 and the fixed plate 14, a plurality of adjustment mouth 24 has been seted up at the top of clamping frame 22, and the vertical corresponding setting of adjustment mouth 24 and circular arc groove 17, the top fixedly connected with of locking piece 23 one side is with the regulating block 25 of adjustment mouth 24 looks adaptation, the bottom fixedly connected with stopper 26 of locking piece 23 one side, the top and the bottom of annular end 18 all set up to plane portion, and the U type draw-in groove 27 with annular end 18 looks adaptation has been seted up to the bottom of locking piece 23.

To describe in detail, the locking piece 23 limits the rotation of the annular end 18, and when the plane portion of the annular end 18 is adjusted to be in a vertical state, the locking piece 23 effectively limits the rotation of the annular end 18, and when the plane portion of the annular end 18 is adjusted to be in a horizontal state, the annular end can slide in the horizontal chute 16, and the state adjustment thereof can be performed by adopting a rotation mode.

As a preferred scheme, in order to guarantee the stability of fixed plate 14 structure, and conveniently inject the inclination of outer lifting hook 2, be provided with the support mounting 30 between two fixed plates 14 in a set of support 4, the support mounting 30 includes left half plate 31, right half plate 32 and fastening plate 33, pass through fastening plate 33 fixed connection between left half plate 31 and the right half plate 32, the one side that left half plate 31 and right half plate 32 are on the back is fixed connection in proper order from top to bottom with upper block 34, median block 35 and lower block 36, upper block 34 sets up at the top of fixed plate 14, lower block 36 sets up in the bottom of fixed plate 14, median block 35 cooperatees with horizontal chute 16 and uses, and the one end fixedly connected with of median block 35 with the anti-slip chuck 20 of circular arc groove 17 looks adaptation.

To describe in detail, the support fixture 30 is designed in a king shape as a whole, and is convenient to install, and can slide not only on the upper surface and the lower surface of the fixing plate 14, but also in the horizontal chute 16 in cooperation with the median block 35 and the anti-slip chuck 20, and at the same time, the space between the two fixing plates 14 can be limited when the anti-slip chuck 20 is not located in the circular arc groove 17.

During use, caliber is adjusted, the locking piece 23 is slid upwards, the adjusting block 25 is separated from the adjusting opening 24, the annular end 18 is rotated after the plane part of the adjusting block is in a horizontal state, the outer lifting hook 2 and the pin shaft 15 are pushed to move along the horizontal sliding groove 16, the notch 21 of the pin end 19 slides in the horizontal sliding groove 16, the pin shaft 15 is rotated after the notch 21 moves into the corresponding circular arc groove 17, the plane part is in a vertical state, the locking piece 23 is moved to the upper part of the annular end 18, the locking piece 23 is pressed downwards, the U-shaped clamping groove 27 is clamped at two sides of the plane part in the vertical state, the adjusting block 25 enters the adjusting opening 24, the adjustment of one outer lifting hook 2 is completed, the operation is repeated, and the adjustment of the other two outer lifting hooks 2 is completed;

after the adjustment is completed, the lifting lug 8 is hung on the lifting hook of the travelling crane, after the workpiece is subjected to heat treatment and is processed into a furnace, the travelling crane controls the lifting hook to move downwards, the lifting tool moves downwards, the bottom ends of the three outer lifting hooks 2 extend into the workpiece, along with the descending of the lifting tool, the fixed plate 14 contacts with the top of the workpiece, the hollow sliding sleeve 5 continuously descends on the centering shaft 1 to drive the inner clamping hook 12 to move downwards, the inner clamping hook 12 is separated from the outer cone 6 and moves onto the unhooking disc 7, along with the continuous downward movement of the inner clamping hook 12, the inner clamping hook 12 moves outwards along the upper surface of the unhooking disc 7 until the inner clamping hook 12 moves to the lower part of the unhooking disc 7, the travelling crane controls the lifting hook to ascend, the hollow sliding sleeve 5 starts to drive the inner clamping hook 12 to move upwards, at the moment, the inner clamping hook 12 drives the unhooking disc 7 to move upwards together until the unhooking disc 7 contacts with the concave notch in the outer cone 6, the inner clamping hook 12 gradually breaks away from the lower end surface of the unhooking disc 7 and continuously ascends, the inner clamping hook 12 swings outwards, the unhooking disc 7 is reset, along with the ascending of the hollow sliding sleeve 5, the steel chain 11 pulls the lifting hook 11, the steel chain 11 to rotate the lifting hook 2, and the workpiece is completed.

Claims

1. The utility model provides an automatic hoist of safe type, includes centering shaft (1) and sets up outer lifting hook (2) on centering shaft (1), its characterized in that: the utility model discloses a steel cable lifting device, including hollow sliding sleeve (5), outer cone (6), outer hook (7), fixed connection through fastening bolt between outer cone (6) and fixed shaft (1), sliding connection between fixed shaft (1) and outer hook (7), the top fixedly connected with lug (8) of hollow sliding sleeve (5), the periphery of hollow sliding sleeve (5) is from last three first otic placode (9) and three second otic placode (10) of fixedly connected with in proper order down, three first otic placode (9) evenly distributed and welded fastening are in hollow sliding sleeve (5) periphery from last to the lower, through fastening bolt fixed connection between outer cone (6) and fixed shaft (1), sliding connection between fixed shaft (7) and fixed shaft (1), the top fixedly connected with lug (8) of hollow sliding sleeve (5), hollow sliding sleeve (5) is followed to the periphery of three first otic placode (9) evenly distributed and welded fastening are in hollow sliding sleeve (5) periphery, three first otic placode (2) are installed between fixed connection between first otic placode (9) and fixed connection (2) and second, and second through-section (12) are fixed on hollow sliding sleeve (12).

2. A safety-type automatic spreader according to claim 1, characterized in that: the support (4) comprises two fixing plates (14), the outer lifting hooks (2) are rotatably arranged between the two fixing plates (14) through pin shafts (15), the two fixing plates (14) are provided with horizontal sliding grooves (16) on the front faces, the tops and the bottoms of the horizontal sliding grooves (16) are provided with arc grooves (17), the number of the arc grooves (17) is provided with a plurality of, and the upper arc groove (17) and the lower arc groove (17) are vertically and correspondingly arranged.

3. A safety-type automatic spreader according to claim 2, characterized in that: the pin shaft (15) comprises an annular end (18) and a pin end (19), the annular end (18) and the pin end (19) are integrally formed, notches (21) matched with the horizontal sliding groove (16) are formed in the top and the bottom of the pin end (19), and pin holes are formed in the notches (21) far away from one side of the annular end (18).

4. A safety-type automatic spreader according to claim 3, characterized in that: one side fixedly connected with card frame (22) of another fixed plate (14) is kept away from to one set of fixed plate (14) in support (4), slidable mounting has locking piece (23) between card frame (22) and fixed plate (14), a plurality of regulation mouth (24) have been seted up at the top of card frame (22), and regulation mouth (24) are vertical to correspond the setting with circular arc groove (17), the top fixedly connected with of locking piece (23) one side and regulating block (25) of regulation mouth (24) looks adaptation, the bottom fixedly connected with stopper (26) of locking piece (23) one side, the top and the bottom of annular end (18) all set up to plane portion, and U type draw-in groove (27) with annular end (18) looks adaptation have been seted up to the bottom of locking piece (23), a plurality of through-hole (28) have been seted up in proper order from last to the surface of outer lifting hook (2).

5. A safety-type automatic spreader according to claim 1, characterized in that: the bottom of the outer side of the inner clamping hook (12) is fixedly connected with a balancing weight (29) through a bolt.

6. A safety-type automatic spreader according to claim 2, characterized in that: a supporting fixing piece (30) is arranged between two fixing plates (14) in a group of supports (4), the supporting fixing piece (30) comprises a left half plate (31), a right half plate (32) and a fastening plate (33), the left half plate (31) and the right half plate (32) are fixedly connected through the fastening plate (33), an upper block (34), a middle block (35) and a lower block (36) are sequentially and fixedly connected to one sides of the left half plate (31) and the right half plate (32) which are opposite from top to bottom, the upper block (34) is arranged at the top of the fixing plate (14), the lower block (36) is arranged at the bottom of the fixing plate (14), the middle block (35) is matched with the horizontal sliding groove (16), and one end of the middle block (35) is fixedly connected with an anti-slip chuck (20) which is matched with the circular arc groove (17).

7. The safety-type automatic lifting appliance according to claim 4, wherein: the outer lifting hook (2) is of a curved design.

8. A safety-type automatic spreader according to claim 1, characterized in that: reinforcing ribs (13) are fixedly connected between two adjacent brackets (4).