Adjustable lifting hook safety clamp

Abstract

The utility model relates to the technical field of hoisting equipment, in particular to an adjustable lifting hook safety clamp, which aims to solve the problems of inconvenience in mounting and poorer use flexibility and stability of a lifting hook safety clamp in the prior art, and specifically comprises a left first side plate and a right first side plate, and one ends of the two first side plates are fixedly connected through a first vertical plate to form a first shell; mounting holes are symmetrically formed in the upper parts of the two first side plates, and mounting screw rods for penetrating through a lifting hook hinged support are arranged in the mounting holes; according to the utility model, a reinforcing structure consisting of the limiting sleeve and the clamping nut is arranged, so that clamping force is provided from two sides to prevent the safety clamp from moving left and right, various lifting hook hinged supports with different specifications can be reinforced, and the use stability and flexibility are improved; when the safety clamp is installed, the safety clamp can smoothly enter a lifting hook opening only by folding the second shell and is matched with a reinforcing structure, and installation convenience and use stability are achieved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting equipment, in particular to an adjustable hook safety card. Background Art

[0002] The hook is the most commonly used and important tool in a crane, used to cooperate with the lifting equipment to hang heavy objects to transport them to the desired location. In order to meet the lifting of various types and weights of objects, the hook has a variety of different shapes and designs, and its installation method and load-bearing capacity are also different.

[0003] At present, when using a hook, in order to prevent the hanging rope from falling off the hook when it is loose, a safety card is provided at the opening of the existing hook. One end of the safety card is rotatably connected to the upper hinge seat of the hook, and the other end is supported by a torsion spring at the lower edge of the hook opening. When there is no human intervention, the opening of the hook is naturally closed, thereby preventing the hanging rope from falling off when it is loose.

[0004] However, since the existing insurance card has a fixed length, in order to be able to smoothly insert it into the opening of the hook for installation, a certain installation clearance needs to be set, which will make the insurance card easy to move left and right during use, and it is impossible to achieve both installation convenience and use stability; and since the shapes and designs of the hooks are different, the overall width of the hinge seat cannot be unified. The insurance card in the prior art only prevents the insurance card from moving left and right through the restraining force provided by the contact surface between the rotating shaft and the hinge seat. When facing a smaller-sized hinge seat, it is too loose and has poor use stability. At the same time, the fixed-length insurance card cannot adapt to hooks of various shapes and designs, and its use flexibility is poor. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide an adjustable hook safety card with good stability and better use flexibility in view of the deficiencies of the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An adjustable hook safety card has the following characteristics:

[0008] It comprises two left and right first side plates, one end of the two first side plates are fixedly connected by a first vertical plate to form a first shell, mounting holes are symmetrically arranged on the upper parts of the two first side plates, mounting screws for passing through the hook hinge seat are arranged in the mounting holes, both ends of the mounting screws pass through the corresponding mounting holes and extend out, and fixing nuts for preventing the mounting screws from axially displacing relative to the first shell are arranged on the two extended ends;

[0009] The hinge seat is arranged in the middle of the mounting screw, and the mounting screws on both sides of the hinge seat are symmetrically provided with limit sleeves, and each limit sleeve is provided with a clamping nut on the side away from the hinge seat, and a first torsion spring is provided between the clamping nut and the first side plate on the corresponding side thereof, which is used to make the first housing rotate around the mounting screw as the axis and close to the lower edge of the hook opening;

[0010] A vertical slide groove is provided at the lower part of the first shell, and a second shell slidably matched with the vertical slide groove is provided below the first shell, and the second shell is fixed to the first shell by adjusting the locking mechanism;

[0011] The adjustment locking mechanism includes a limit rod rotatably arranged between the two first side plates, the limit rod is parallel to the mounting screw, a locking fastener is installed at the middle part, a hook plate is provided at one end of the locking fastener facing the second shell, a strip rack corresponding to the hook plate is vertically provided on the second shell, and a second torsion spring is installed on the limit rod between the second shell and the locking fastener to make the hook plate rotate around the limit rod as the axis and close to the strip rack.

[0012] The technical problem to be solved by the utility model can be further achieved through the following steps: the second shell includes two left and right second side panels, one end of the two second side panels are fixedly connected as a whole through a second vertical panel tightly attached to the inner side of the first vertical panel, the strip-shaped rack is arranged on the inner side of the second vertical panel, the vertical slide groove is arranged on the side opposite to the two first side panels, and a slider corresponding to the vertical slide groove is provided on the second side panel.

[0013] The technical problem to be solved by the utility model can be further achieved through the following steps: vertical limiting long grooves cooperating with the limiting rods are symmetrically provided on the two second side plates to stop the second shell from moving downward and separating from the first shell.

[0014] The technical problem to be solved by the utility model can be further achieved through the following steps: the limiting long groove is a straight waist groove, the groove width is equal to the diameter of the limiting rod, and the length is equal to the length of the belt-shaped rack.

[0015] The technical problem to be solved by the utility model can be further achieved through the following steps: the locking fastener includes a rotating plate, a connecting ear extending from the middle of the rotating plate to both sides, a connecting hole for the limiting rod to pass through is provided on the connecting ear, and the hook plate is arranged at the lower end of the rotating plate and is fixedly connected to the rotating plate as a whole.

[0016] The technical problem to be solved by the utility model can be further achieved through the following steps: the second torsion spring includes an upper torsion arm, two spring bodies and two lower torsion arms connected in sequence, the spring body is sleeved on the limit rod and distributed between the strip-shaped rack and the corresponding side connecting ear, the upper torsion arm abuts inwardly against the outer side of the upper part of the rotating plate, and the lower torsion arm abuts outwardly against the inner side of the second vertical plate and does not contact the strip-shaped rack.

[0017] The technical problem to be solved by the utility model can be further achieved through the following steps: one end of the limit rod passes through a corresponding through hole on the side plate and extends out, and a rotating knob is installed on the extended end.

[0018] The technical problem to be solved by the utility model can be further achieved through the following steps: the lower end of the second shell is provided with an arc-shaped groove corresponding to the arc surface of the lower edge of the hook opening.

[0019] The technical problem to be solved by the utility model can be further achieved through the following steps: a wear-resistant coating is provided on the side of the limiting sleeve facing the hinge seat.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows: by providing a reinforcement structure composed of a limit sleeve and a clamping nut, clamping force is provided from both sides to prevent the safety card from moving left and right, and various specifications of hook hinge seats can be reinforced, thereby improving the stability and flexibility of use; by providing a retractable second shell under the first shell, the length of the second shell can be adjusted to meet the needs of various hook sizes, further improving the flexibility of use. At the same time, when installing the safety card, only the second shell needs to be folded up to smoothly enter the hook opening. Combined with the reinforcement structure, both installation convenience and stability of use are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the installation position of the utility model;

[0022] Figure 2 It is a top plan view of the upper part of the utility model;

[0023] Figure 3 It is the overall front view of the utility model;

[0024] Figure 4 It is a lower left view of the utility model;

[0025] Figure 5 for Figure 4 A-section view.

[0026] In the figure: 1-hook; 2-hook safety card; 3-hinge seat; 4-first torsion spring; 5-mounting screw; 6-fixing nut; 7-limiting sleeve; 8-clamping nut; 9-first shell; 91-first side plate; 92-first vertical plate; 10-second shell, 101-second side plate; 102-second vertical plate; 11-locking fastener; 12-second torsion spring; 121-upper torsion arm; 122-spring body; 123-lower torsion arm; 13-belt rack; 14-limiting rod; 15-long waist groove; 16-turning knob; 17-hook plate; 18-turning plate; 19-connecting ear; 20-arc-shaped groove. DETAILED DESCRIPTION

[0027] The specific technical solutions of the present invention are further described below so that those skilled in the art can further understand the present invention, but it does not constitute a limitation on the rights thereof.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0029] Reference Figure 1-5 , an adjustable hook insurance card, comprising two left and right first side plates 91, one end of the two first side plates 91 is fixedly connected through a first vertical plate 92 to form a first housing 9, mounting holes are symmetrically arranged on the upper part of the two first side plates 91, and mounting screws 5 for passing through the hinge seat 3 of the hook 1 are arranged in the mounting holes, and both ends of the mounting screws 5 pass through the corresponding mounting holes and extend out, and fixing nuts 6 for preventing the mounting screws 5 from axial displacement relative to the first housing 9 are arranged on the two extended ends;

[0030] The hinge seat 3 is arranged in the middle of the mounting screw 5, and the mounting screws 5 on both sides of the hinge seat 3 are symmetrically provided with limit sleeves 7. A clamping nut 8 is provided on the side of each limit sleeve 7 away from the hinge seat 3. The clamping nut 8 cooperates with the thread on the mounting screw 5 to clamp the limit sleeve 7 on the hinge seat 3 from both sides, so that the installation and use process of the insurance card is more stable and prevents it from moving left and right relative to the hinge seat 3. The limit sleeve 7 can be made of metal or rubber material, and the use of rubber material can accumulate elastic potential energy through compression to achieve a better limiting effect, but it may affect the rotation effect of the insurance card. When taking and placing the lifting rope, the clamping force of the clamping nut 8 needs to be adjusted to a certain extent. A first torsion spring 4 is provided between the clamping nut 8 and the first side plate 91 on the corresponding side thereof, which is used to make the first shell 9 rotate around the mounting screw 5 as the axis and close to the lower edge of the opening of the hook 1;

[0031] A vertical slide groove (not shown in the figure) is provided at the lower part of the first shell 9, and a second shell 10 slidably matched with the vertical slide groove is provided below the first shell 9. The second shell 10 and the first shell 9 are kept fixed by adjusting the locking mechanism; the second shell 10 can be partially retracted into the first shell 9 to match the hooks 1 of different sizes. There is linear adjustment between it and the first shell 9. When in use, it is pulled out of the first shell 9 to a suitable length and then fixed by adjusting the locking mechanism.

[0032] The adjusting locking mechanism includes a limit rod 14 rotatably arranged between the two first side plates 91, the limit rod 14 is parallel to the mounting screw 5, a locking fastener 11 is installed in the middle thereof, one end of the locking fastener 11 is provided with a hook plate 17 facing the second housing 10, a belt-shaped rack 13 corresponding to the hook plate 17 is vertically provided on the second housing 10, and a second torsion spring 12 is installed on the limit rod 14 between the second housing 10 and the locking fastener 11 to make the hook plate 17 rotate around the limit rod 14 as the axis and close to the belt-shaped rack 13. When the insurance card is in the locked state, the hook plate 17 is pressed against the belt-shaped rack 13 by the pre-tightening force of the second torsion spring 12. When the lock needs to be released, the limit rod 14 is rotated clockwise to drive the locking fastener 11 to flip up and release the hook plate 17 from the belt-shaped rack 13, and at this time, the second housing 10 can be freely raised and lowered along the vertical slide groove.

[0033] In order to make the second shell 10 obtain higher structural rigidity and ensure that it has good torsion and shear resistance, the second shell 10 includes two left and right second side plates 101, one end of the two second side plates 101 is fixedly connected as a whole through the second vertical plate 102 close to the inner side of the first vertical plate 92, the strip-shaped rack 13 is arranged on the inner side of the second vertical plate 102, the vertical slide groove is arranged on the opposite side of the two first side plates 91, and a slider (not shown in the figure) corresponding to the vertical slide groove is arranged on the second side plate 101. Compared with only setting the second vertical plate 102, the above structure enhances the stability of the second shell 10 as a whole, can better prevent excessive deflection when impacted and cause self-deformation, and improve the insurance effect.

[0034] In order to prevent the second shell 10 from moving downward and losing the sliding fit with the first shell 9, the ideal effect cannot be achieved by simply setting a stopper at the bottom end of the slide, and vertical limit grooves cooperating with the limit rod 14 are symmetrically provided on the two second side plates 101. The two ends of the limit rod 14 pass through the limit grooves respectively and are rotatably connected to the first shell 9. Since the limit rod 14 cannot be radially displaced, when the second shell 10 moves downward to the maximum distance, the limit rod 14 can abut against the upper edge of the limit groove, thereby stopping the second shell 10 from moving downward and losing contact with the first shell 9.

[0035] In order to improve the limiting effect of the limiting long groove, the limiting long groove is a straight long waist groove 15, the groove width of which is equal to the diameter of the limiting rod 14, and the length of which is equal to the length of the belt-shaped rack 13. A section of the limiting rod 14 is completely inserted into the long waist groove 15, so that it can not only limit the vertical displacement distance of the second housing 10, but also assist the vertical slideway to maintain its lateral stability.

[0036] In order to achieve a better locking effect for the locking fastener 11, the locking fastener 11 includes a rotating plate 18, and connecting ears 19 extend from the middle of the rotating plate 18 to both sides. The connecting ears 19 are provided with connecting holes for the limiting rod 14 to pass through. The hook plate 17 is arranged at the lower end of the rotating plate 18 and is fixedly connected to the rotating plate 18 as a whole. The second torsion spring 12 applies an upward thrust to the side of the rotating plate 18 away from the hook plate 17, thereby firmly pressing the hook plate 17 downward onto the belt-shaped rack 13, which has stable locking and a light structure, and can save materials.

[0037] In the above structure, the second torsion spring 12 includes an upper torsion arm 121, two spring bodies 122 and two lower torsion arms 123 connected in sequence, the spring body 122 is sleeved on the limiting rod 14 and distributed between the strip-shaped rack 13 and the corresponding side connecting ear 19, the upper torsion arm 121 abuts inwardly against the outer side of the upper part of the rotating plate 18, and the lower torsion arm 123 abuts outwardly against the inner side of the second vertical plate 102 and does not contact the strip-shaped rack 13.

[0038] In order to facilitate manual operation of the limit rod 14 to rotate to release the limit, one end of the limit rod 14 passes through the corresponding through hole opened on the side plate and extends out, and a rotation knob 16 is installed on the extended end. The diameter of the rotation knob 16 is about 15mm, which is convenient for manual rotation.

[0039] In order to increase the effective area of ​​the second shell 10 for stopping the lifting rope and enhance its performance, an arc-shaped groove 20 corresponding to the arc surface of the lower edge of the opening of the hook 1 is provided at the lower end of the second shell 10. When in use, it can be further lowered to fit the hook surface in a high degree, thereby better playing the stopping and insurance effect.

[0040] In order to increase the service life of the limiting sleeve 7 , a wear-resistant coating is provided on the side of the limiting sleeve 7 facing the hinge seat 3 .

[0041] Working principle: The utility model is an adjustable hook safety card. In the initial state, for easy installation, the second housing 10 is retracted into the first housing 9 as much as possible to reduce the overall length of the safety card. When in use, the safety card is connected to the hook 1 by installing the screw 5 through the hinge seat 3 on the hook 1, and then the fixing nut 6 is tightened from both sides to complete the initial fixation, and then the clamping force of the clamping nut 8 is adjusted to make the limit sleeve 7 close to the hinge seat 3 to complete the installation. Then, according to the specifications of the opening of the hook 1, the rotating knob 16 is turned clockwise to release the matching between the hook plate 17 and the belt-shaped rack 13, and the second housing 10 is lowered until the arc-shaped groove 20 at its lower end abuts against the lower edge of the opening of the hook 1, and then the rotating knob 16 is loosened, and the rotating plate 18 rotates around the limit rod 14 under the action of the second torsion spring 12, and the hook plate 17 is pressed against the belt-shaped rack 13 again to complete the natural locking.

[0042] The utility model provides a reinforcement structure consisting of a limit sleeve 7 and a clamping nut 8 to provide clamping force from both sides to prevent the insurance card from moving left and right, and can reinforce the hinge seat 3 of a plurality of different specifications of the hook 1, thereby improving the stability and flexibility of use; by arranging a retractable second shell 10 under the first shell 9, the length of the second shell 10 can be adjusted to meet the needs of a plurality of different sizes of hooks 1, thereby further improving the flexibility of use. At the same time, when installing the insurance card, it only needs to fold up the second shell 10 to smoothly enter the opening of the hook 1. With the reinforcement structure, both installation convenience and stability in use are achieved, the structure is simple, the cost is low, and it has a good prospect of use.

Claims

1. An adjustable hook safety card, characterized in that: It comprises two left and right first side plates, one end of the two first side plates are fixedly connected by a first vertical plate to form a first shell, mounting holes are symmetrically arranged on the upper parts of the two first side plates, mounting screws for passing through the hook hinge seat are arranged in the mounting holes, both ends of the mounting screws pass through the corresponding mounting holes and extend out, and fixing nuts for preventing the mounting screws from axially displacing relative to the first shell are arranged on the two extended ends; The hinge seat is arranged in the middle of the mounting screw, and the mounting screws on both sides of the hinge seat are symmetrically provided with limit sleeves, and each limit sleeve is provided with a clamping nut on the side away from the hinge seat, and a first torsion spring is provided between the clamping nut and the first side plate on the corresponding side thereof, which is used to make the first housing rotate around the mounting screw as the axis and close to the lower edge of the hook opening; A vertical slide groove is provided at the lower part of the first shell, and a second shell slidably matched with the vertical slide groove is provided below the first shell, and the second shell is fixed to the first shell by adjusting the locking mechanism; The adjustment locking mechanism includes a limit rod rotatably arranged between the two first side plates, the limit rod is parallel to the mounting screw, a locking fastener is installed at the middle part, a hook plate is provided at one end of the locking fastener facing the second shell, a strip rack corresponding to the hook plate is vertically provided on the second shell, and a second torsion spring is installed on the limit rod between the second shell and the locking fastener to make the hook plate rotate around the limit rod as the axis and close to the strip rack.

2. The adjustable hook safety card according to claim 1, characterized in that: The second shell includes two left and right second side plates, one end of the two second side plates are fixedly connected as a whole by a second vertical plate tightly attached to the inner side of the first vertical plate, the strip-shaped rack is arranged on the inner side of the second vertical plate, the vertical slide groove is arranged on the side opposite to the two first side plates, and a slider corresponding to the vertical slide groove is provided on the second side plate.

3. The adjustable hook safety card according to claim 2, characterized in that: Vertical limiting long grooves cooperating with the limiting rods are symmetrically arranged on the two second side plates to prevent the second shell from moving downward and separating from the first shell.

4. The adjustable hook safety card according to claim 3, characterized in that: The limiting long groove is a straight-line long waist groove, the groove width of which is equal to the diameter of the limiting rod, and the length of which is equal to the length of the belt-shaped rack.

5. The adjustable hook safety card according to claim 2, characterized in that: The locking fastener includes a rotating plate, a connecting ear extending from the middle of the rotating plate to both sides, a connecting hole for the limiting rod to pass through is provided on the connecting ear, and the hook plate is arranged at the lower end of the rotating plate and fixedly connected to the rotating plate as a whole.

6. The adjustable hook safety card according to claim 5, characterized in that: The second torsion spring includes an upper torsion arm, two spring bodies and two lower torsion arms connected in sequence, the spring body is sleeved on the limiting rod and distributed between the strip-shaped rack and the corresponding side connecting ears, the upper torsion arm abuts inwardly against the outer side of the upper part of the rotating plate, and the lower torsion arm abuts outwardly against the inner side of the second vertical plate and does not contact the strip-shaped rack.

7. The adjustable hook safety card according to claim 1, characterized in that: One end of the limit rod passes through a corresponding through hole on the side plate and extends out, and a rotating knob is installed on the extended end.

8. The adjustable hook safety card according to claim 1, characterized in that: The lower end of the second shell is provided with an arc-shaped groove corresponding to the arc surface of the lower edge of the hook opening.

9. The adjustable hook safety card according to claim 1, characterized in that: A wear-resistant coating is provided on the side of the limiting sleeve facing the hinge seat.

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