Lifting appliance self-locking mechanism

Abstract

The invention provides a lifting appliance self-locking mechanism, and relates to the technical field of lifting appliances, the lifting appliance self-locking mechanism comprises a clamping mechanism, the clamping mechanism is connected with a seat plate and an L-shaped plate, the L-shaped plate extends and penetrates through the seat plate, the lower end of the L-shaped plate is rotatably connected with a supporting plate mechanism, the supporting plate mechanism is connected with a rotating shaft through a belt pulley mechanism, the rotating shaft is fixedly connected with the L-shaped plate, and the rotating shaft is connected with a gear through a bevel gear mechanism. The gear is meshed with a supporting frame mechanism, the supporting frame mechanism movably extends to penetrate through the base plate, a weight block is connected to the upper end face of the supporting frame mechanism, an L-shaped supporting frame is fixedly connected to the side end face of the supporting frame mechanism, a supporting plate mechanism is arranged to support the bottom of a clamped piece, and supporting force of the supporting plate mechanism to the clamped piece is provided through the downward gravity of the weight block. And falling of the clamped part when the hydraulic cylinder fails is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting tools, and particularly to a self-locking mechanism for a lifting tool. Background Art

[0002] In the fields of equipment manufacturing or logistics transportation, it is often necessary to hoist objects. Inevitably, lifting tools are required during the hoisting process. Depending on the objects to be hoisted, there are various types, such as common hooks, lifting claws, electromagnetic lifting devices, etc. When using a lifting claw, the clamping mechanism is used to grasp the object. Usually, the clamping of the object is powered by a hydraulic cylinder. When the hydraulic cylinder fails, the object grasped in the air is likely to fall, posing a risk. In view of the above problems, we propose a self-locking mechanism for a lifting tool. Summary of the Invention

[0003] In view of the above problems, the present invention provides a self-locking mechanism for a lifting tool, which is provided with a support plate mechanism to support the bottom of the clamping member, and the downward gravity of the heavy object block is used to provide the supporting force of the support plate mechanism for the clamping member, so as to prevent the clamped member from falling when the hydraulic cylinder fails.

[0004] A self-locking mechanism for a lifting tool provided by the present invention includes a clamping mechanism. A seat plate and an L-shaped plate are connected to the clamping mechanism. The L-shaped plate extends through the seat plate. A support plate mechanism is rotatably connected to the lower end of the L-shaped plate. The support plate mechanism is connected to a rotating shaft through a pulley mechanism. The rotating shaft is fixedly connected to the L-shaped plate. The rotating shaft is connected to a gear through a bevel gear mechanism. A support frame mechanism is engaged with the gear. The support frame mechanism extends through the seat plate movably. A heavy object block is connected to the upper end surface of the support frame mechanism, and an L-shaped support is fixedly connected to the side end surface.

[0005] A further improvement scheme of the present invention is that the support plate mechanism includes an elastic telescopic rod and a rotating wheel. One end of the elastic telescopic rod is rotatably connected to the lower end surface of the L-shaped plate, and the rotating wheel is rotatably connected to the end of the elastic telescopic rod away from the L-shaped plate.

[0006] A further improvement scheme of the present invention is that the bevel gear mechanism includes bevel gear one, bevel gear two, bevel gear three, and a collar. Bevel gear one is coaxially and fixedly sleeved on the rotating shaft. Bevel gear two is engaged with bevel gear one. A bracket connected to the L-shaped plate is rotatably connected to bevel gear two. Bevel gear three is engaged with bevel gear two. A shaft rod is concentrically and fixedly penetrated through bevel gear three. The shaft rod is rotatably connected to the collar. The collar is fixedly connected with a shaft rod that concentrically penetrates through bevel gear two.

[0007] A further improvement scheme of the present invention is that the support frame mechanism includes a U-shaped frame, an L-shaped support plate, and a rack. The U-shaped frame slides through the seat plate. The L-shaped support plate slides through the seat plate. A placement groove is provided on the L-shaped support plate. The rack is arranged in the placement groove and fixedly connected to the L-shaped support plate. The rack is engaged with the gear.

[0008] According to a further improved solution of the present invention, the weight block is fixedly connected to the upper end of the U-shaped frame, and L-shaped legs are fixedly connected to both side ends of the U-shaped frame.

[0009] According to a further improvement of the present invention, the lower end of the L-shaped support leg is arranged at the lower end of the lowest point of the elastic telescopic rod, and the lowest point of the elastic telescopic rod is located below the lowest point of the clamping mechanism.

[0010] Beneficial effects of the present invention: The present invention provides a self-locking mechanism for a sling: 1. The external pulling mechanism pulls the seat plate upward, driving the grasped object to move upward, and the L-shaped plate moves upward, causing relative displacement with the L-shaped support leg. The two elastic telescopic rods rotate and close together to press against the bottom side of the grasped object. At this time, the supporting force is given by the weight block, and the gravity of the weight block is greater than the gravity of the grasped object. When the hydraulic telescopic rod fails, there is the supporting force of the elastic telescopic rod, and the grasped object will not fall at this time, ensuring safety; 2. When the whole device rises after placement, the hydraulic telescopic rod is in the starting and extended state, and the clamping claws will not grab the grasped object and move it up. When the whole device moves up, the rotating wheel presses against the side end of the grasped object. Due to the rotating characteristics of the rotating wheel, it can be relatively displaced with the grasped object well, and will not clamp the grasped object. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of a self-locking mechanism of a sling of the present invention; Figure 2 A self-locking mechanism for a sling according to the present invention Figure 1 The enlarged view of point A in the middle; Figure 3 A self-locking mechanism for a sling according to the present invention Figure 1 The enlarged view of point B in the middle; Figure 4 It is a structural diagram of a support frame mechanism and a clamping mechanism of a sling self-locking mechanism of the present invention; Figure 5 A self-locking mechanism for a sling according to the present invention Figure 4 Enlarged view of point C in the middle.

[0012] In the attached drawings: 1. clamping mechanism; 2. seat plate; 3. L-shaped plate; 4. support plate mechanism; 5. pulley mechanism; 6. bevel gear mechanism; 7. gear; 8. support frame mechanism; 9. weight block; 10. L-shaped support frame; 11. elastic telescopic rod; 12. rotating wheel; 13. bevel gear one; 14. bevel gear two; 15. bevel gear three; 16. collar; 17. bracket; 18. U-shaped frame; 19. L-shaped support plate; 20. rack; 21. L-shaped support foot; 22. hydraulic telescopic rod; 23. support plate; 24. vertical plate; 25. clamp; 26. connecting plate one; 27. connecting plate two; 28. vertical pull plate; 29. pulley; 30. connecting belt. DETAILED DESCRIPTION

[0013] For the convenience of understanding the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein; similarly, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0014] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs; the terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0016] According to Figures 1 - 5 A self-locking mechanism for a lifting tool shown in the figure includes a clamping mechanism 1. A seat plate 2 and an L-shaped plate 3 are connected to the clamping mechanism 1. The L-shaped plate 3 extends through the seat plate. A support plate mechanism 4 is rotatably connected to the lower end of the L-shaped plate 3. The support plate mechanism 4 is connected to a rotating shaft through a pulley mechanism 5. The rotating shaft is fixedly connected to the L-shaped plate 3. The rotating shaft is connected to a gear 7 through a bevel gear mechanism 6. A support frame mechanism 8 is engaged with the gear 7. The support frame mechanism 8 extends through the seat plate 2 movably. A heavy object block 9 is connected to the upper end surface of the support frame mechanism 8, and an L-shaped support 10 is fixedly connected to the side end surface.

[0017] The clamping mechanism 1 includes a hydraulic telescopic rod 22, a support plate 23, a connecting block, a vertical plate 24, a clamp 25, a first connecting plate 26, a second connecting plate 27, and a vertical pulling plate 28. The hydraulic telescopic rod 22 movably passes through the seat plate 2. The support plate 23 is fixedly sleeved on the fixed end surface of the hydraulic telescopic rod 22 and is located between the support frame mechanism 8 and the seat plate 2. The vertical plate 24 movably passes through the seat plate 2. The clamp 25 is rotatably arranged at the lower end of the vertical plate 24 through the first connecting plate 26. The vertical pulling plate 28 movably passes through the seat plate 2. The connecting block is rotatably connected to the clamp 25 through the second connecting plate 27. The L-shaped plate 3 is fixedly connected to the support plate 23. The connecting block is fixedly connected to the moving end of the hydraulic telescopic rod 22.

[0018] The support plate mechanism 4 of the present invention includes an elastic telescopic rod 11 and a rotating wheel 12. One end of the elastic telescopic rod 11 is rotatably connected to the lower end surface of the L-shaped plate 3, and the rotating wheel 12 is rotatably connected to the end of the elastic telescopic rod 11 away from the L-shaped plate 3.

[0019] The bevel gear mechanism 6 of the present invention includes a first bevel gear 13, a second bevel gear 14, a third bevel gear 15, and a collar 16. The first bevel gear 13 is coaxially and fixedly sleeved on a rotating shaft. The second bevel gear 14 meshes with the first bevel gear 13. A bracket 17 connected to the L-shaped plate 3 is rotatably connected to the second bevel gear 14. The third bevel gear 15 meshes with the second bevel gear 14. A shaft rod is concentrically and fixedly penetrated through the third bevel gear 15. The shaft rod is rotatably connected to the collar 16. A shaft rod that concentrically penetrates through the second bevel gear 14 is fixedly connected to the collar 16.

[0020] The pulley mechanism includes pulleys 29 and a connecting belt 30. There are two pulleys 29, which are respectively coaxially and fixedly connected to the elastic telescopic rod 11 and the rotating shaft. The connecting belt 30 connects the two pulleys 29.

[0021] The support frame mechanism 8 of the present invention includes a U-shaped frame 18, an L-shaped support plate 19, and a rack 20. The U-shaped frame 18 slidably passes through the seat plate 2. The L-shaped support plate 19 slidably passes through the seat plate 2. A placement groove is provided on the L-shaped support plate 19. The rack 20 is arranged in the placement groove and fixedly connected to the L-shaped support plate 19. The rack 20 meshes with the gear 7.

[0022] The support plate is arranged inside the U-shaped frame.

[0023] In the present invention, a heavy object block 9 is fixedly connected to the upper end of the U-shaped frame 18. L-shaped support feet 21 are respectively fixedly connected to both side ends of the U-shaped frame 18.

[0024] In the present invention, the lower end of the L-shaped support foot 21 is arranged below the lowest point of the elastic telescopic rod 11. The lowest point of the elastic telescopic rod 11 is located below the lowest point of the clamping mechanism 1.

[0025] The elastic telescopic rod 11 includes a fixed end, a protruding end, and a spring. The protruding end is slidably connected to the fixed end. The spring is arranged inside the fixed end and contacts the fixed end and the protruding end at both ends respectively. The spring provides power for the relative displacement of the protruding end moving relative to the fixed end. The fixed end is rotatably connected to the L-shaped plate 3. The protruding end is rotatably connected to the rotating wheel 12.

[0026] Principle: The external pulling mechanism is connected to the seat plate 2. When clamping, the hydraulic telescopic rod 22 starts to extend, driving the connecting block to move downward, driving the second connecting plate 27 to rotate and move, driving the two clamping hands 25 to rotate outward, and the whole device moves downward. The L-shaped support feet 21 first contact the ground. After the L-shaped support feet 21 contact the ground, the seat plate 2 and the L-shaped plate 3 move downward, generating a relative displacement with the L-shaped support feet 21. When the L-shaped plate 3 moves downward, it drives the gear 7 to move downward, generating a relative displacement between the gear 7 and the rack 20. The gear 7 rotates, driving the third bevel gear 15 to rotate, driving the second bevel gear 14 to rotate, and then driving the first bevel gear 13 to rotate. The elastic telescopic rod is driven to rotate through the pulley mechanism 5, and the two elastic telescopic rods 11 rotate and expand. The hydraulic telescopic rod 22 starts to retract, driving the two clamping hands 25 to clamp the item; The external pulling mechanism pulls the seat plate 2 upward, driving the grabbed item upward. The L-shaped plate 3 moves upward, generating a relative displacement with the L-shaped support leg 21. The two elastic telescopic rods 11 rotate and close together, pressing against the bottom side end of the grabbed item. At this time, the supporting force is provided by the heavy object block 9, and the gravity of the heavy object block 9 is greater than the gravity of the grabbed item. When the hydraulic telescopic rod 22 fails, there is the supporting force of the elastic telescopic rod 11, and the grabbed item will not fall at this time, ensuring safety. When the whole device rises after being placed, the hydraulic telescopic rod 22 is in the starting and extending state and will not grab the grabbed item and move it upward through the clamping hand 25. When the whole device moves upward, the rotating wheel 12 presses against the side end of the grabbed item. Due to the rotating characteristic of the rotating wheel 12, it can well generate a relative displacement with the grabbed item and will not clamp the grabbed item.

[0027] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various modifications and decorations without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims

1. A sling self-locking mechanism, including a clamping mechanism (1), characterized in that: A clamping mechanism (1) is connected with a seat plate (2) and an L-shaped plate (3). The L-shaped plate (3) extends through the seat plate. A support plate mechanism (4) is rotatably connected to the lower end of the L-shaped plate (3). The support plate mechanism (4) is connected to a rotating shaft through a pulley mechanism (5). The rotating shaft is fixedly connected to the L-shaped plate (3). The rotating shaft is connected to a gear (7) through a bevel gear mechanism (6). A support frame mechanism (8) is meshed with the gear (7). The support frame mechanism (8) extends through the seat plate (2) movably. A heavy object block (9) is connected to the upper end surface of the support frame mechanism (8), and an L-shaped support (10) is fixedly connected to the side end surface.

2. The self-locking mechanism of a lifting tool according to claim 1, characterized in that: The support plate mechanism (4) includes an elastic telescopic rod (11) and a rotating wheel (12). One end of the elastic telescopic rod (11) is rotatably connected to the lower end surface of the L-shaped plate (3), and the rotating wheel (12) is rotatably connected to the end of the elastic telescopic rod (11) far from the L-shaped plate (3).

3. The self-locking mechanism of a lifting tool according to claim 1, characterized in that: The bevel gear mechanism (6) includes a first bevel gear (13), a second bevel gear (14), a third bevel gear (15), and a collar (16). The first bevel gear (13) is coaxially and fixedly sleeved on the rotating shaft. The second bevel gear (14) is meshed with the first bevel gear (13). A bracket (17) connected to the L-shaped plate (3) is rotatably connected to the second bevel gear (14). The third bevel gear (15) is meshed with the second bevel gear (14). A shaft rod is concentrically and fixedly penetrated through the third bevel gear (15). The shaft rod is rotatably connected to the collar (16). A shaft rod concentrically passing through the second bevel gear (14) is fixedly connected to the collar (16).

4. A sling self-locking mechanism according to claim 1, characterized in that: The support frame mechanism (8) includes a U-shaped frame (18), an L-shaped support plate (19), and a rack (20). The U-shaped frame (18) slides through the seat plate (2), and the L-shaped support plate (19) slides through the seat plate (2). A placement groove is provided on the L-shaped support plate (19), and the rack (20) is arranged in the placement groove and fixedly connected to the L-shaped support plate (19). The rack (20) is meshed with the gear (7).

5. The self-locking mechanism of a lifting tool according to claim 1, wherein: The heavy object block (9) is fixedly connected to the upper end of the U-shaped frame (18), and L-shaped support feet (21) are respectively fixedly connected to both side ends of the U-shaped frame (18).

6. The self-locking mechanism of a lifting tool according to claim 1, wherein: The lower end of the L-shaped support foot (21) is arranged below the lowest point of the elastic telescopic rod (11), and the lowest point of the elastic telescopic rod (11) is located below the lowest point of the clamping mechanism (1).

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