Novel rotatable lifting hook

Abstract

The utility model discloses a novel rotatable lifting hook which is provided with a rotary assembly and a driving assembly, an inner cylinder body of the rotary assembly is connected with a lifting rope through an upper connecting assembly, an outer gear ring is connected with a hook body through a lower connecting assembly, and the driving assembly drives the outer gear ring, the lower connecting assembly and the hook body to rotate. On the basis that an existing lifting hook moves in the vertical direction, the hook body rotates, materials can be driven to rotate synchronously, the working condition that the materials need to be lifted to rotate together is met, the driving assembly comprises a motor, the motor is connected with an electric control system of the lifting machine, and starting, stopping and the rotating speed of the motor are controlled by manually operating the electric control system; therefore, the rotation and the rotating speed of the hook body are controlled, and the lifting hook can conveniently hook materials and drive the materials to rotate.

Description

TECHNICAL FIELD

[0001] The utility model relates to hoisting equipment technical field especially relates to a novel rotatable lifting hook. BACKGROUND

[0002] The crane is the multi -action hoist machinery of vertical hoist and horizontal transport heavy object in a certain range, also called the overhead crane, the navigation crane or the crane, wherein the lifting of the crane mainly relies on the lifting hook, the existing lifting hook mainly includes the hook body, the connecting beam, the movable pulley group, the top drive arrangement of crane moves up through the rope traction movable pulley and drives the hook body to move up, the lifting hook is provided with the rotating assembly, the rotating assembly includes the inner cylinder, the outer gear ring that is sleeved on the inner cylinder and the plurality of rolling bodies that are evenly arranged between the inner cylinder and the outer gear ring, the bottom of the outer gear ring is connected with the hook body through the lower connecting assembly, the top of the inner cylinder is connected with the lifting rope through the upper connecting assembly, the axis extension direction of the inner cylinder and the outer gear ring is vertical direction, the rotating assembly is provided with the switch assembly, the switch assembly includes the cross limit switch that is connected with the upper connecting assembly, the rotating assembly is provided with the plurality of limiting assemblies, the plurality of limiting assemblies are evenly arranged around the top of the hook body, the limiting assembly includes the stop rod that is connected with the lower connecting assembly, the stop rod can push the cross rod body of the cross limit switch, the rotating assembly is provided with the drive assembly, the drive assembly includes the motor that is arranged at one side of the rotating assembly, the motor is used for driving the outer gear ring to rotate, the input end of the motor is electrically connected with the output end of the crane electric control system, the input end of the crane electric control system is electrically connected with the output end of the cross limit switch.

[0003] But the lifting hook of the existing crane can only complete the movement of the up and down direction, the rotation of the horizontal direction can only be adjusted manually, not only inconvenient to adjust, and cannot satisfy the working condition that needs to rotate with the lifting material. UTILITY MODEL CONTENT

[0004] In view of the above-mentioned defects or insufficient in the prior art, it is expected to provide a novel rotatable lifting hook.

[0005] The utility model provides a novel rotatable lifting hook, which comprises:

[0006] The hook body;

[0007] The rotating assembly comprises an inner cylinder, an outer gear ring sleeved on the inner cylinder, and a plurality of rolling bodies evenly arranged between the inner cylinder and the outer gear ring. The bottom end of the outer gear ring is connected with the hook body through a lower connecting assembly. The top end of the inner cylinder is connected with the lifting rope through an upper connecting assembly. The axis extension directions of the inner cylinder and the outer gear ring are both vertical directions.

[0008] The switch assembly comprises a cross limit switch connected with the upper connecting assembly.

[0009] The plurality of limiting assemblies are evenly arranged around the top of the hook body and comprise a stop rod connected with the lower connecting assembly. The stop rod can push the cross rod body of the cross limit switch.

[0010] The drive assembly comprises a motor arranged at one side of the rotating assembly. The motor is used for driving the outer gear ring to rotate. The input end of the motor is electrically connected with the output end of the crane electric control system. The input end of the crane electric control system is electrically connected with the output end of the cross limit switch.

[0011] According to the technical scheme provided by the embodiment of the present application, the upper connecting assembly comprises an upper connecting plate arranged at the top end of the inner cylinder. A self-rotating movable pulley is swing-connected to the top end of the upper connecting plate. The swing axis extension direction of the movable pulley and the axis extension direction of the movable pulley are both first directions. The movable pulley is connected with the lifting rope.

[0012] According to the technical scheme provided in the embodiment of the present application, the upper connecting plate top end is arranged with two limiting groups along the first direction, each of the limiting groups comprises two limiting installation plates arranged along the first direction, a first shaft body is installed through the top of the two limiting installation plates, a second installation plate is rotatably sleeved on each of the first shaft bodies, a second shaft body is arranged through between the two second installation plates, the second shaft body is sleeved with the movable pulley in the middle part, and the axis line extension directions of the first shaft body and the second shaft body are both the first direction.

[0013] According to the technical scheme provided in the embodiment of the present application, a plurality of reinforcing plates are arranged along the second direction between the limiting installation plates close to each other in the two limiting groups, and the bottom end of each of the reinforcing plates is connected with the top surface of the upper connecting plate.

[0014] According to the technical scheme provided in the embodiment of the present application, the upper connecting plate is extended to form an extension plate at both ends along the first direction, the driving assembly comprises a speed reducer arranged on the extension plate, the input shaft of the speed reducer is key-connected with the output shaft of the motor, the bottom end of the output shaft of the speed reducer is provided with a driving shaft, the driving shaft is externally sleeved with a driving gear, and the driving gear is in meshing transmission connection with the outer gear ring.

[0015] According to the technical scheme provided in the embodiment of the present application, the bottom end of the extension plate is provided with a N-shaped combination plate, the top of the driving shaft is sleeved with a first bearing, the bottom of the driving shaft is sleeved with a second bearing, the first bearing is embeddedly installed at the bottom of the N-shaped combination plate, and the second bearing is embeddedly installed at the middle part of the extension plate.

[0016] According to the technical scheme provided in the embodiment of the present application, the lower connecting assembly comprises a lower connecting ring connected with the bottom end of the outer gear ring, the lower connecting ring is internally provided with a mounting sleeve, the hook body is connected with the mounting sleeve, the muscle plate is arranged around between the bottom surface of the lower connecting ring and the outer wall of the mounting sleeve, and a plurality of limiting assemblies are respectively installed on the corresponding muscle plates.

[0017] According to the technical scheme provided in the embodiment of the present application, the limiting assembly comprises an installation block connected with the blocking rod, the top end of the installation block is provided with a first clamping groove, one side wall of the first clamping groove is provided with an anti-skid line, the other side wall is threadedly connected with a clamping bolt, and the muscle plate corresponding to the limiting assembly is located between the end part of the clamping bolt and the anti-skid line.

[0018] According to the technical scheme provided in the embodiment of the present application, the side wall away from the anti-skid line of the first clamping groove is provided with a second clamping groove, a hexagon nut is clamped in the second clamping groove, and the clamping bolt is threadedly connected with the hexagon nut.

[0019] According to the technical scheme provided by the embodiment of the application, the limiting assembly further comprises a cross rod connected with the stop rod, a through slot is arranged on the mounting block, the cross rod is slidably arranged in the through slot, a locking screw hole in communication with the through slot is arranged on one side wall of the mounting block, and a locking bolt is threadedly connected in the locking screw hole.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] The utility model discloses a rotary assembly and drive assembly are provided, and the inner cylinder of rotary assembly is connected with the hoisting rope through upper connecting component, and the outer tooth ring is connected through lower connecting component and hook body, and drive assembly drives the rotation of outer tooth ring, lower connecting component and hook body, and then on the basis that existing hook moves in the up-down direction, realizes the rotation of hook body, can take the synchronous rotation of material, satisfies the working condition that the material is hoisted and rotates together, and drive assembly includes motor, and the motor is connected with the electric control system of hoisting machine, and manual operation controls the start and stop and rotational speed of motor through electric control system, and then realizes the control of hook body rotation and rotational speed etc.

[0022] In addition, the application also has a stop rod connected with the lower connecting ring, and a cross limiting switch connected with the upper connecting plate, when the hook body, the lower connecting assembly and the outer tooth ring rotate, the stop rod will be driven to rotate, when the stop rod pushes the cross rod body of the cross limiting switch, triggers the contact of the cross limiting switch to make the motor stop running, plays the function of limiting, realizes the purpose of controlling stroke, further, the stop rod can be detachably installed on the mounting block, the mounting block is clamped on the rib plate through clamping bolts, finally realizes the quick installation of the stop rod, and the rib plate surrounds the outer wall of the mounting sleeve, and then the position of the stop rod can be quickly adjusted according to the required stroke, which is convenient for more accurately limiting the rotation stroke of the hook body.

[0023] It should be understood that the content described in the utility model content part is not intended to limit the key or important features of the embodiments of the utility model, nor is it intended to limit the scope of the utility model. Other features of the utility model will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0024] Other features, objects and advantages of the utility model will become more apparent through reading the detailed description of the non-limiting embodiments made by referring to the following drawings:

[0025] Figure 1 A structural schematic view of a novel rotatable lifting hook provided by the embodiment of the application is provided.

[0026] Figure 2 A partial sectional view of a novel rotatable lifting hook provided by the embodiment of the application is provided.

[0027] Figure 3A mounting structure diagram of a new type of rotatable hook middle movable pulley provided by the embodiment of the application is shown in the figure.

[0028] Figure 4 A mounting structure diagram of a new type of rotatable hook middle lower connecting ring and mounting sleeve provided by the embodiment of the application is shown in the figure.

[0029] Figure 5 A structure diagram of a new type of rotatable hook middle limiting component provided by the embodiment of the application is shown in the figure.

[0030] Figure 6 A cross-sectional structure diagram of a new type of rotatable hook middle mounting block provided by the embodiment of the application is shown in the figure.

[0031] Figure mark:

[0032] 1, hook body;

[0033] 2, rotating assembly; 21, outer tooth ring; 22, inner cylinder; 23, rolling body;

[0034] 3, lower connecting assembly; 31, lower connecting ring; 32, mounting sleeve; 33, rib plate; 34, cross beam;

[0035] 4, upper connecting assembly; 41, upper connecting plate; 42, extension plate; 43, limiting mounting plate; 44, first shaft body; 45, reinforcing plate; 46, second mounting plate; 47, second shaft body; 48, movable pulley;

[0036] 5, driving assembly; 51, motor; 52, speed reducer; 53, driving shaft; 54, driving gear; 55, V-shaped combined plate;

[0037] 6, switch assembly; 61, first mounting plate; 62, L-shaped sheet metal part; 63, cross limiting switch;

[0038] 7, limiting assembly; 71, stop rod; 72, mounting block; 73, first clamping groove; 74, anti-skid pattern; 75, second clamping groove; 76, hexagonal nut; 77, clamping bolt; 78, through groove; 79, locking screw hole; 710, locking bolt; 711, cross rod. DETAILED DESCRIPTION

[0039] The utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and are not limited to the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for convenience of description.

[0040] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0041] Please refer to Figures 1-6 The embodiment of the utility model provides a novel rotatable hook hook body 1.

[0042] Hook body 1;

[0043] Rotary assembly 2, including inner cylinder 22, and the outer tooth ring 21 of being sleeved to inner cylinder 22, and several even be arranged between the rolling body 23 of inner cylinder 22 and outer tooth ring 21, the bottom end of outer tooth ring 21 is connected with hook body 1 through lower connecting assembly 3, and the top end of inner cylinder 22 is connected with hoisting rope through upper connecting assembly 4, and the axis extension direction of inner cylinder 22 and outer tooth ring 21 is vertical direction;

[0044] Switch assembly 6, including the cross limiting switch 63 of being connected with upper connecting assembly 4;

[0045] Several limiting assemblies 7, are evenly arranged around the top of hook body 1, including the stop lever 71 of being connected with lower connecting assembly 3, and the cross lever body of stop lever 71 can push cross limiting switch 63;

[0046] Drive assembly 5, including motor 51 being arranged in rotary assembly 2 one side, and motor 51 is used for driving outer tooth ring 21 rotation, and the input end of motor 51 is electrically connected with the output end of crane electric control system, and the input end of crane electric control system is electrically connected with the output end of cross limiting switch 63;

[0047] As Figure 1 And Figure 2As shown, the utility model discloses a rotary assembly 2 and drive assembly 5 are provided, the inner cylinder 22 of rotary assembly 2 is connected with the lifting rope through upper connecting assembly 4, and the outer tooth ring 21 is connected through lower connecting assembly 3 and hook body 1, drive assembly 5 drives the rotation of outer tooth ring 21, lower connecting assembly 3 and hook body 1, and then on the basis of the up-down direction movement of the existing hook, the rotation of hook body 1 is realized, the synchronous rotation of the material can be brought, the working condition that the material is hoisted together is satisfied, and drive assembly 5 includes motor 51, motor 51 can be connected by the electric control system of the crane, manually controls the start-stop and rotating speed of motor 51 by operating the electric control system, and then the rotation and rotating speed of hook body 1 are realized, and it is more convenient for the hook to hoist the material and rotate with the material, further, when hook body 1, lower connecting assembly 3 and outer tooth ring 21 rotate, the rotation of the stop lever 71 is driven, when the cross rod body of cross limiting switch 63 is pushed by stop lever 71, the contact of cross limiting switch 63 is triggered, the electric signal generated after the contact action is transmitted to the crane electric control system, the start-stop of motor 51 is controlled by the crane electric control system, and then the stop of motor 51 is realized, the function of limiting is played, the purpose of controlling stroke is realized, in addition, the user can directly control the start-stop and rotating speed of motor 51 through the crane electric control system.

[0048] In some embodiments, the upper connecting assembly 4 includes an upper connecting plate 41 arranged at the top end of the inner cylinder 22, and a self-rotatable movable pulley 48 is swing-connected to the top end of the upper connecting plate 41. The swing axis of the movable pulley 48 and the axis of the movable pulley 48 both extend in a first direction. The movable pulley 48 is connected to the lifting rope.

[0049] As shown in Figure 2 and Figure 3 , the first direction is the left-right direction in Figure 1 , and the movable pulley 48 needs to rotate during the contraction and expansion of the lifting rope. The movable pulley 48 is rotatably installed on the upper connecting plate 41 to play a buffering role, avoiding the shaking of the upper connecting plate 41 with the movable pulley 48 and the lifting rope. Under the gravity of the hook body 1, the upper connecting assembly 4, the rotary assembly 2 and the lower connecting assembly 3, the upper connecting plate 41 always maintains a vertical state, avoiding the instability of the hook body 1 caused by the shaking of the movable pulley 48 with the lifting rope.

[0050] In some embodiments, two limiting groups are arranged at the top end of the upper connecting plate 41 in the first direction. Each limiting group includes two limiting mounting plates 43 arranged in the first direction. A first shaft 44 is arranged through the top portions of the two limiting mounting plates 43. A second mounting plate 46 is rotatably sleeved on each first shaft 44. A second shaft 47 is arranged through the two second mounting plates 46. A self-rotatable movable pulley 48 is sleeved in the middle portion of the second shaft 47. The axes of the first shaft 44 and the second shaft 47 both extend in the first direction.

[0051] As shown inFigure 2 And Figure 3 As shown in

[0052] In some embodiments, several reinforcing plates 45 are arranged between the limiting installation plates 43 close to each other in the second direction, and the bottom end of each reinforcing plate 45 is connected to the top surface of the upper connecting plate 41.

[0053] As shown in Figure 2 And Figure 3 The second direction is the front-back direction in Figure 1 , the reinforcing plates 45 improve the strength of the limiting installation plates 43, reducing the bending of the limiting installation plates 43 to the left or right side, and optionally, two reinforcing plates 45 are arranged at the front end and the rear end between the limiting installation plates 43, facilitating the welding connection of the reinforcing plates 45 with other surfaces.

[0054] In some embodiments, the upper connecting plate 41 extends to form an extension plate 42 at both ends in the first direction, the drive assembly 5 includes a speed reducer 52 arranged on the extension plate 42, the input shaft of the speed reducer 52 is keyed connected with the output shaft of the motor 51, the output shaft of the speed reducer 52 is provided with a drive shaft 53, the drive shaft 53 is externally sleeved with a driving gear 54, and the driving gear 54 is in meshing transmission connection with the outer gear ring 21.

[0055] As shown in Figure 2 And Figure 4 The speed of the motor 51 is reduced through the speed reducer 52, driving the drive shaft 53 to rotate, and finally driving the outer gear ring 21 to rotate through the meshing transmission connection between the driving gear 54 and the outer gear ring 21.

[0056] In some embodiments, the bottom end of the extension plate 42 is provided with a U-shaped combination plate 55, the drive shaft 53 is externally sleeved with a first bearing at the top and a second bearing at the bottom, the first bearing is embedded and installed at the bottom of the U-shaped combination plate 55, and the second bearing is embedded and installed at the middle of the extension plate 42.

[0057] As shown in Figure 2 And Figure 4 The first bearing and the second bearing are used to fix the drive shaft 53, improving the stability of the drive shaft 53 during rotation and ensuring stable driving, and further, the U-shaped combination plate 55 includes two vertical plates and a horizontal plate connecting the bottom ends of the two vertical plates, the top ends of the two vertical plates are connected with the bottom pad of the extension plate 42, and the first bearing is embedded and installed in the middle of the horizontal plate.

[0058] In some embodiments, the V-shaped combination plate 55 is provided with a first mounting plate 61 on one side, and the first mounting plate 61 is provided with an L-shaped metal piece 62 on one side, and a cross-limiting switch 63 is mounted at the bottom end of the L-shaped metal piece 62. Figure 4 As shown in the figure, the installation of the cross-limiting switch 63 is realized, and by adjusting the length of the vertical part and the length of the horizontal part of the L-shaped metal piece 62, it is convenient to ensure that the stop rod 71 can stably and accurately contact the cross rod body of the cross-limiting switch 63.

[0059] In some embodiments, the lower connecting assembly 3 includes a lower connecting ring 31 connected to the bottom end of the outer tooth ring 21, and the inside of the lower connecting ring 31 is provided with a mounting sleeve 32, the hook body 1 is connected with the mounting sleeve 32, and the bottom surface of the lower connecting ring 31 and the outer wall of the mounting sleeve 32 are circumferentially provided with a rib plate 33, and a plurality of limiting assemblies 7 are respectively mounted on the corresponding rib plates 33.

[0060] As shown in the figure, Figure 2 and Figure 4 The top end of the hook body 1 is provided with a cross beam 34, and the two ends of the cross beam 34 are connected with the top end of the mounting sleeve 32, realizing the installation of the hook body 1. Compared with directly connecting the cross beam 34 with the lower connecting ring 31, after adding the mounting sleeve 32 and the rib plate 33, the structure is more stable, reducing the situation that the hook body 1 falls off, and further, the number of limiting assemblies 7 is set to two, and the limiting stroke is 180°, that is, when the hook body 1, the lower connecting assembly 3 and the outer tooth ring 21 rotate, the stop rod 71 of the limiting assembly 7 will rotate, and when the rotation exceeds 180°, the stop rod 71 will push the cross rod body of the cross-limiting switch 63, so that the motor 51 stops running, realizing the purpose of stroke control.

[0061] In some embodiments, the limiting assembly 7 includes a mounting block 72 connected with the stop rod 71, the top end of the mounting block 72 is provided with a first clamping groove 73, one side wall of the first clamping groove 73 is provided with an anti-skid pattern 74, and the other side wall is threadedly connected with a clamping bolt 77, and the rib plate 33 corresponding to the limiting assembly 7 is located between the end of the clamping bolt 77 and the anti-skid pattern 74.

[0062] As shown in the figure, Figure 4 and Figure 5 The clamping bolt 77 is rotated, and under the action of the thread, the clamping bolt 77 clamps one side of the rib plate 33, and the anti-skid pattern 74 abuts against the other side of the rib plate 33, finally realizing the purpose of installation. This kind of installation method is simple and convenient, and it is convenient to adjust the position of the stop rod 71 at any time, and it is flexible to adjust the limiting stroke.

[0063] In some embodiments, the side wall of the first clamping groove 73 away from the anti-skid pattern 74 is provided with a second clamping groove 75, a hexagon nut 76 is clamped in the second clamping groove 75, and the clamping bolt 77 is threadedly connected with the hexagon nut 76.

[0064] As Figure 5 and Figure 6 The threaded connection of the clamping bolt 77 is realized by the hex nut 76, without the need to open a screw hole on the mounting block 72, reducing the processing complexity, and the second clamping groove 75 can limit the rotation of the hex nut 76, ensuring the stable rotation and clamping of the clamping bolt 77. Optionally, the second clamping groove 75 is provided with an opening on one side, facilitating the removal of the hex nut 76, and the assembly is more convenient.

[0065] In some embodiments, the limiting component 7 further comprises a cross rod 711 connected with the stop rod 71, the mounting block 72 is provided with a through groove 78, the cross rod 711 is slidingly arranged in the through groove 78, and a side wall of the mounting block 72 is provided with a locking screw hole 79 in communication with the through groove 78, and a locking bolt 710 is threadedly connected in the locking screw hole 79;

[0066] As Figure 5 and Figure 6 shown, the cross rod 711 is inserted into the through groove 78, and the cross rod 711 is abutted by the locking bolt 710, realizing the quick installation and fixation of the cross rod 711 and the stop rod 71.

[0067] In the description of the present specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] In the description of the present specification, the terms "one embodiment", "some embodiments" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A novel rotatable hook, characterized in that, include: Hook body (1); The rotating assembly (2) includes an inner cylinder (22), an outer toothed ring (21) fitted onto the inner cylinder (22), and several rolling elements (23) evenly distributed between the inner cylinder (22) and the outer toothed ring (21). The bottom end of the outer toothed ring (21) is connected to the hook body (1) through a lower connecting assembly (3), and the top end of the inner cylinder (22) is connected to the lifting rope through an upper connecting assembly (4). The axial extension directions of the inner cylinder (22) and the outer toothed ring (21) are both vertical. The switch assembly (6) includes a cross limit switch (63) connected to the upper connection assembly (4); Several limiting components (7) are evenly arranged around the top of the hook body (1), including a stop bar (71) connected to the lower connecting component (3), the stop bar (71) can push the cross bar of the cross limit switch (63); The drive assembly (5) includes a motor (51) located on one side of the rotary assembly (2). The motor (51) is used to drive the external gear ring (21) to rotate. The input end of the motor (51) is electrically connected to the output end of the crane electrical control system. The input end of the crane electrical control system is electrically connected to the output end of the cross limit switch (63).

2. The novel rotatable hook according to claim 1, characterized in that, The upper connecting assembly (4) includes an upper connecting plate (41) located at the top of the inner cylinder (22). The top of the upper connecting plate (41) is sway-connected to a self-rotating movable pulley (48). The extension direction of the swing axis of the movable pulley (48) and the extension direction of the axis of the movable pulley (48) are both in the first direction. The movable pulley (48) is connected to the lifting rope.

3. The novel rotatable hook according to claim 2, characterized in that, The top of the upper connecting plate (41) has two limiting groups arranged along the first direction. Each limiting group includes two limiting mounting plates (43) arranged along the first direction. A first shaft (44) is installed through the top of the two limiting mounting plates (43). A second mounting plate (46) is rotatably connected to each first shaft (44). A second shaft (47) is provided through the two second mounting plates (46). A self-rotating movable pulley (48) is installed in the middle of the second shaft (47). The axis extension direction of the first shaft (44) and the second shaft (47) is the first direction.

4. The novel rotatable hook according to claim 3, characterized in that, A plurality of reinforcing plates (45) are arranged along the second direction between the adjacent limiting mounting plates (43) in the two limiting groups, and the bottom end of each reinforcing plate (45) is connected to the top surface of the upper connecting plate (41).

5. The novel rotatable hook according to claim 2, characterized in that, The upper connecting plate (41) extends to both ends along the first direction to form extension plates (42). The drive assembly (5) includes a reducer (52) disposed on the extension plate (42). The input shaft of the reducer (52) is keyed to the output shaft of the motor (51). The bottom end of the output shaft of the reducer (52) is provided with a drive shaft (53). The drive shaft (53) is fitted with a drive gear (54) on the outside. The drive gear (54) meshes with the external gear ring (21) for transmission.

6. The novel rotatable hook according to claim 5, characterized in that, The extension plate (42) has a U-shaped combination plate (55) at its bottom end. The drive shaft (53) is fitted with a first bearing at its top and a second bearing at its bottom. The first bearing is embedded in the bottom of the U-shaped combination plate (55) and the second bearing is embedded in the middle of the extension plate (42).

7. The novel rotatable hook according to claim 1, characterized in that, The lower connecting assembly (3) includes a lower connecting ring (31) connected to the bottom end of the outer toothed ring (21). The lower connecting ring (31) is provided with an installation sleeve (32). The hook body (1) is connected to the installation sleeve (32). Ribs (33) are arranged around the bottom surface of the lower connecting ring (31) and the outer wall of the installation sleeve (32). Several limiting components (7) are respectively installed on the corresponding ribs (33).

8. The novel rotatable hook according to claim 7, characterized in that, The limiting component (7) includes a mounting block (72) connected to the stop bar (71). The top of the mounting block (72) is provided with a first locking groove (73). One side wall of the first locking groove (73) is provided with anti-slip texture (74), and the other side wall is threaded with a clamping bolt (77). The rib plate (33) corresponding to the limiting component (7) is located between the end of the clamping bolt (77) and the anti-slip texture (74).

9. The novel rotatable hook according to claim 8, characterized in that, The first clamping groove (73) has a second clamping groove (75) on the side wall away from the anti-slip texture (74). A hexagonal nut (76) is clamped in the second clamping groove (75), and the clamping bolt (77) is threadedly connected to the hexagonal nut (76).

10. The novel rotatable hook according to claim 9, characterized in that, The limiting component (7) also includes a crossbar (711) connected to the stop bar (71). The mounting block (72) is provided with a through groove (78). The crossbar (711) is slidably disposed in the through groove (78). One side wall of the mounting block (72) is provided with a locking screw hole (79) communicating with the through groove (78). A locking bolt (710) is threaded into the locking screw hole (79).

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