Automatic unhooking device for crab cage

Abstract

The invention discloses an automatic unhooking device for a crab cage, characterized in that: the device hook is equipped with an unhooking frame with the hook, the hook comprises an upper shell, a through hole is provided on the bottom end surface of the upper shell, a lower shell is movably connected in the through hole, a limiting ring is provided at the outer wall of the upper part of the lower shell, the limiting ring is located above the through hole and the outer diameter of the limiting ring is greater than the diameter of the through hole, a supporting shaft is provided at the top of the lower shell, a left swinging member and a right swinging member are rotatably connected on the supporting shaft at the same time, the left swinging member and the right swinging member have the same structure and are symmetrically distributed, an inclined portion located in the lower shell is provided at the bottom end of the left swinging member, a slideway is provided on the inclined portion, a semicircular portion located above the upper shell is provided on the top of the left swinging member, the left swinging member and the right swinging member together form an inverted Y-shaped structure, and the two semicircular portions at the top of the left swinging member and the right swinging member can together form a complete connecting ring.

Description

Technical Field

[0001] The invention relates to a connecting mechanism, in particular to an automatic decoupling device for a crab cage. Background Art

[0002] In order to improve work efficiency when harvesting and transporting crabs, automated conveying equipment is often used to transport crab cages from location A to location B using conveyor belts to facilitate operations such as packing and placing. Generally, crab cages are hung on conveyor belts or chains by hooks, and after arriving at the designated location, the crab cages need to be manually disassembled from the hooks, which is time-consuming and labor-intensive, requires more human resources, and also limits the conveying speed, seriously affecting work efficiency. Therefore, a method or device that can solve the above problems is now needed. Summary of the invention

[0003] The present invention aims to solve the above-mentioned deficiencies in the prior art and proposes a device with simple structure, ingenious design, reasonable layout and capable of realizing automatic unhooking operation without manual intervention.

[0004] The technical solution of the present invention is: an automatic dehooking device for a crab cage, characterized in that the device comprises a hook 1, and a dehooking frame 2 is matched with the hook 1.

[0005] The hook 1 includes an upper shell 3, a through hole is provided on the bottom end surface of the upper shell 3, a lower shell 4 is movably connected in the through hole, a limiting ring 5 is provided at the outer wall of the upper part of the lower shell 4, the limiting ring 5 is located above the through hole and the outer diameter of the limiting ring 5 is larger than the diameter of the through hole, a supporting shaft 6 is provided on the top of the lower shell 4, a left swinging member 7 and a right swinging member 8 are simultaneously rotatably connected to the supporting shaft 6, the left swinging member 7 and the right swinging member 8 have the same structure and are symmetrically distributed, an inclined portion 9 located in the lower shell 4 is provided at the bottom end of the left swinging member 7, a slideway 10 is provided on the inclined portion 9, a semicircular portion 11 located above the upper shell 3 is provided on the top of the left swinging member 7, the left swinging member 7 and the right swinging member 8 together form an inverted Y-shaped structure, and the two semicircular portions 11 at the top of the left swinging member 7 and the right swinging member 8 can together form a complete connecting ring.

[0006] The upper shell 3 consists of an upper cover 12 and a main body 13 which are threadedly connected to each other. Four positioning pins 14 are evenly distributed in the circumferential direction at the outer circumference of the upper shell. The top of the positioning pin 14 is connected to the upper cover 12, and the bottom of the positioning pin 14 is movably connected to the positioning hole provided on the limiting ring 5. In addition, a first spring 15 is also sleeved on the positioning pin 14 between the limiting ring 5 and the upper cover 12.

[0007] Four pins evenly distributed in the circumferential direction are arranged at the center of the upper cover 12, two of which are driving pins 16, and the other two are connecting pins 17, and the driving pin 16 and the connecting pin 17 are not adjacent to each other in the circumferential direction, and the bottom ends of the driving pin 16 and the connecting pin 17 both pass through the through holes opened on the top of the lower shell 4, and a limiting nut is arranged at the bottom end of the connecting pin 17, and a connecting head 18 is arranged at the bottom of the driving pin 16, and a slider is rotatably connected to the connecting head 18, and the slider is embedded in the slide 10 and can slide back and forth in the slide 10, and a second spring 19 is sleeved on the driving pin 16 between the lower shell 4 and the upper cover 12, and on the connecting pin 17 between the lower shell 4 and the upper cover 12.

[0008] A connecting piece 20 is disposed on the bottom end surface of the lower shell 4 .

[0009] The unhooking frame 2 includes two parallel frames, which form an angle of 10-20° with the horizontal plane, and the end of the frame close to the incoming material direction is relatively high. A plurality of equally distributed rollers 21 are arranged on the bottom end surface of the frame, and the rollers 21 on different frames are distributed in pairs, and the distance between the same pair of rollers 21 is less than the diameter of the upper shell 3.

[0010] A small semicircular portion 22 is further provided on the top of the semicircular portion 11 . The radius of the small semicircular portion 22 is smaller than the radius of the semicircular portion 11 . The direction of the small semicircular portion 22 is opposite to that of the semicircular portion 11 , and there is a smooth transition between the two.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The automatic unhooking device of the crab cage of this structural form has a simple structure, ingenious design and reasonable layout. It is designed to solve the problems existing in the traditional crab cage handling and sorting process. It uses an inclined unhooking frame to apply a certain pressure to the hook, and converts the displacement caused by the above pressure into the swinging action of two swinging parts through various transmission mechanisms. Since the tops of the two swinging parts jointly form a connecting ring directly connected to the conveyor belt or conveyor chain, when the connecting ring is separated (forming two semicircles), the hook automatically detaches from the conveyor chain and falls. The emergence of this automatic unhooking device can save a lot of manpower and improve work efficiency. In addition, its manufacturing process is simple and the manufacturing cost is low. Therefore, it can be said that it has many advantages and is particularly suitable for promotion and application in this field. Its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0014] Figure 2It is a cross-sectional view of the hook portion in the embodiment of the present invention.

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the hook part in the embodiment of the present invention.

[0016] Figure 4 Schematic diagram of the structure of the swing member in the embodiment of the present invention. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention will be described below with reference to the accompanying drawings. Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown: a crab cage automatic unhooking device, comprising a hook 1, and a unhooking frame 2 is provided with the hook 1.

[0018] The hook 1 includes an upper shell 3, a through hole is provided on the bottom end surface of the upper shell 3, a lower shell 4 is movably connected in the through hole, a limiting ring 5 is provided at the outer wall of the upper part of the lower shell 4, the limiting ring 5 is located above the through hole and the outer diameter of the limiting ring 5 is larger than the diameter of the through hole, a supporting shaft 6 is provided on the top of the lower shell 4, a left swinging member 7 and a right swinging member 8 are simultaneously rotatably connected to the supporting shaft 6, the left swinging member 7 and the right swinging member 8 have the same structure and are symmetrically distributed, an inclined portion 9 located in the lower shell 4 is provided at the bottom end of the left swinging member 7, a slideway 10 is provided on the inclined portion 9, a semicircular portion 11 located above the upper shell 3 is provided on the top of the left swinging member 7, the left swinging member 7 and the right swinging member 8 together form an inverted Y-shaped structure, and the two semicircular portions 11 at the top of the left swinging member 7 and the right swinging member 8 can together form a complete connecting ring.

[0019] The upper shell 3 consists of an upper cover 12 and a main body 13 which are threadedly connected to each other. Four positioning pins 14 are evenly distributed in the circumferential direction at the outer circumference of the upper shell. The top of the positioning pin 14 is connected to the upper cover 12, and the bottom of the positioning pin 14 is movably connected to the positioning hole provided on the limiting ring 5. In addition, a first spring 15 is also sleeved on the positioning pin 14 between the limiting ring 5 and the upper cover 12.

[0020] Four pins evenly distributed in the circumferential direction are arranged at the center of the upper cover 12, two of which are driving pins 16, and the other two are connecting pins 17, and the driving pin 16 and the connecting pin 17 are not adjacent to each other in the circumferential direction, and the bottom ends of the driving pin 16 and the connecting pin 17 both pass through the through holes opened on the top of the lower shell 4, and a limiting nut is arranged at the bottom end of the connecting pin 17, and a connecting head 18 is arranged at the bottom of the driving pin 16, and a slider is rotatably connected to the connecting head 18, and the slider is embedded in the slide 10 and can slide back and forth in the slide 10, and a second spring 19 is sleeved on the driving pin 16 between the lower shell 4 and the upper cover 12, and on the connecting pin 17 between the lower shell 4 and the upper cover 12.

[0021] A connecting piece 20 is disposed on the bottom end surface of the lower shell 4 .

[0022] The unhooking frame 2 includes two parallel frames, which form an angle of 10-20° with the horizontal plane, and the end of the frame close to the incoming material direction is relatively high. A plurality of equally distributed rollers 21 are arranged on the bottom end surface of the frame, and the rollers 21 on different frames are distributed in pairs, and the distance between the same pair of rollers 21 is less than the diameter of the upper shell 3.

[0023] A small semicircular portion 22 is further provided on the top of the semicircular portion 11 . The radius of the small semicircular portion 22 is smaller than the radius of the semicircular portion 11 . The direction of the small semicircular portion 22 is opposite to that of the semicircular portion 11 , and there is a smooth transition between the two.

[0024] The working process of the automatic unhooking device for a crab cage of the embodiment of the present invention is as follows: in the initial state, under the joint action of the first spring 15 and the second spring 19, the upper shell 3 and the lower shell 4 are in an extended state, the operator holds the lower shell 4 and presses down the upper shell 3, so that the semicircular parts 11 at the top of the left swing member 7 and the right swing member 8 are opened, the connecting rope ring on the conveying chain is placed between the two semicircular parts 11, and the pressure on the upper shell 3 is removed, and the two semicircular parts 11 are closed again to form a complete connecting ring, so that the hook 1 is connected to the conveying chain; in this way, the crab cage pre-connected with the hook 1 through the connecting member 20 can be transported under the action of the conveying chain;

[0025] When the hook 1 moves to the unhooking frame 2, since the connecting rope enters between the two parallel frames, the frames are tilted as a whole, and the overall length of the connecting rope does not change much (non-elastic rope), the further the hook moves, the greater the pressure exerted on the hook by the rollers 21 on the two frames. Since the connecting rope is directly connected to the two swinging members, and the two swinging members are rotatably supported on the lower shell 4 through the support shaft 6, the overall height of the lower shell 4 does not change during the above process, and the upper shell 3 moves downward relative to the lower shell 4.

[0026] When the upper shell 3 moves downward relative to the lower shell 4, all the positioning pins 14 will slide in the positioning holes on the limit ring 5, and all the first springs 15 will be compressed. This structure is mainly to prevent the upper shell 3 and the lower shell 4 from rotating relative to each other during the operation.

[0027] When the upper shell 3 moves downward relative to the lower shell 4, the driving pin 16 and the connecting pin 17 will also move downward, and all the second springs 19 will be compressed. The slider at the bottom of the driving pin 16 will slide in the slideway 10 and push the inclined part 9 to move, thereby driving the left swing member 7 and the right swing member 8 to swing around the support shaft 6, so that the two semicircular parts 11 that were originally closed into a complete and closed connecting ring are separated from each other, so that the hook 1 will be separated from the connecting rope, realizing automatic unhooking.

[0028] Since a small semicircular portion 22 is provided on the top of the semicircular portion 11, the direction of the small semicircular portion 22 is opposite to that of the semicircular portion 11, and there is a smooth transition between the two, so that the connecting rope can be more conveniently removed from the inside of the semicircular portion 11, ensuring that the unhooking action can be carried out smoothly.

[0029] When the hook 1 falls and loses the external pressure, the upper shell 3 moves upward relative to the upper shell 4 again under the joint action of the first spring 15 and the second spring 19, and the two semicircular parts are closed again to form a complete connection ring. In the next operation, the upper shell 3 and the lower shell 4 are pressed down manually to move relative to each other, so that the two semicircular parts 11 at the top of the left swing member 7 and the right swing member 8 are opened again, and the hook 1 and the crab pot are hung on the connecting rope for fishing.

Claims

1. A crab cage automatic unhooking device, characterized in that: The device comprises a hook (1), and a hook-off frame (2) is provided with the hook (1). The hook (1) comprises an upper shell (3), a through hole is formed on the bottom end surface of the upper shell (3), a lower shell (4) is movably connected to the through hole, a limit ring (5) is provided on the outer wall of the upper part of the lower shell (4), the limit ring (5) is located above the through hole and the outer diameter of the limit ring (5) is larger than the diameter of the through hole, a support shaft (6) is provided on the top of the lower shell (4), a left swinging member (7) and a right swinging member (8) are rotatably connected to the support shaft (6), and the left swinging member (7) and the right swinging member (8) are rotatably connected to the support shaft (6), and the left swinging member (7) and the right swinging member (8) are rotatably connected to the support shaft (6). The swing members (8) have the same structure and are symmetrically distributed. An inclined portion (9) located in the lower shell (4) is provided at the bottom end of the left swing member (7). A slideway (10) is provided on the inclined portion (9). A semicircular portion (11) located above the upper shell (3) is provided on the top of the left swing member (7). The left swing member (7) and the right swing member (8) together form an inverted Y-shaped structure. The two semicircular portions (11) at the top of the left swing member (7) and the right swing member (8) can together form a complete connecting ring. The upper shell (3) is composed of an upper cover (12) and a body (13) which are threadedly connected to each other. Four positioning pins (14) are evenly distributed in the circumferential direction at the outer circumference of the upper shell. The top ends of the positioning pins (14) are connected to the upper cover (12), and the bottom ends of the positioning pins (14) are movably connected to positioning holes provided on the limiting ring (5). A first spring (15) is also sleeved on the positioning pins (14) between the limiting ring (5) and the upper cover (12). Four pins are arranged at the center of the upper cover (12) and are evenly distributed in the circumferential direction, two of which are driving pins (16) and the other two are connecting pins (17), and the driving pin (16) and the connecting pin (17) are not adjacent in the circumferential direction. The bottom ends of the driving pin (16) and the connecting pin (17) pass through a through hole opened at the top of the lower shell (4), a limit nut is arranged at the bottom end of the connecting pin (17), and a connecting head (18) is arranged at the bottom of the driving pin (16). A slider is rotatably connected in the connecting head (18), and the slider is embedded in the slideway (10) and can slide back and forth in the slideway (10). A second spring (19) is sleeved on the driving pin (16) between the lower shell (4) and the upper cover (12) and on the connecting pin (17) between the lower shell (4) and the upper cover (12). The bottom end surface of the lower shell (4) is provided with a connecting piece (20). The unhooking frame (2) comprises two parallel frames, the frames form an angle of 10-20° with the horizontal plane, and one end of the frame close to the incoming material direction is relatively high. A plurality of rollers (21) distributed at equal intervals are arranged on the bottom end surface of the frame, the rollers (21) on different frames are distributed in pairs, and the distance between the same pair of rollers (21) is less than the diameter of the upper shell (3).

2. The automatic unhooking device for crab cage according to claim 1, characterized in that: A small semicircular portion (22) is also provided at the top of the semicircular portion (11); the radius of the small semicircular portion (22) is smaller than the radius of the semicircular portion (11); the orientation of the small semicircular portion (22) is opposite to that of the semicircular portion (11), and there is a smooth transition between the two.

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