A self-locking device for a crane hook and a self-locking operation method

Abstract

The present invention belongs to the technical field of cranes, and discloses a self-locking device for a crane hook and a self-locking operation method, comprising a hook body, wherein a self-locking mechanism is arranged inside the hook body, the self-locking mechanism comprises a first arc-shaped sliding block, and a blocking and limiting action is implemented on a notch of the hook body through the self-locking mechanism, so as to prevent a rope sleeved in the hook body from falling off, symmetrically distributed rope limiting mechanisms are arranged on both sides of the hook body, the rope limiting mechanism comprises a fixed block, and the rope limiting mechanism is located on both sides of the self-locking mechanism, and a clamping and limiting action is implemented on the rope sleeved in the hook body through the rope limiting mechanism, and the present invention realizes automatic blocking and limiting of the notch of the hook body through the self-locking mechanism, so as to effectively prevent the rope from falling off from the hook body during hoisting, and through automatic blocking, not only the labor of manual climbing and locking is reduced, but also the effect of avoiding the safety hazard of climbing is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of cranes, and in particular relates to a self-locking device for a crane hook and a self-locking operation method. Background Art

[0002] A crane refers to a multi-action lifting machinery that vertically lifts and horizontally transports heavy objects within a certain range. It is generally divided into four categories: light and small lifting equipment, bridge-type lifting machinery, jib-type cranes and cable cranes. Cranes play an important role in modern industry. When using a crane, it is generally equipped with a hook. The hook on the crane is often suspended on the wire rope of the lifting mechanism with the help of components such as a pulley block. When in use, the goods are generally tied and fixed with a rope, and then one end of the rope is hung on the hook, and the object is fixed with the hook. Then the crane is started to lift and transport the object. When the hook of an existing crane is in use, in order to prevent the rope from falling off, a limit rod that can automatically rebound is installed at the opening of the hook using a spring. After the rope is hung on the hook, the limit rod is used to seal the hook.

[0003] The existing crane hooks are usually movable and rotatable, which is convenient for steering when the rope is inserted. However, when the movable hook is used to lift and move the suspended object through the rope, inertia will be generated during the movement, causing the suspended object to shake and swing due to inertia, and the movement of the hook will cause the suspended object to rotate during the shaking. The shaking and rotation of the suspended object will cause reciprocating friction between the rope and the hook, which not only has poor stability but also easily reduces the service life of the rope. Although the current hook seals the hook with a rebound limit rod to prevent the rope from falling off the hook, it is still necessary to manually climb above the suspended object to insert and remove the rope from the hook before and after lifting, which is not only labor-intensive but also prone to safety hazards. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a self-locking device and a self-locking operation method for a crane hook, which has the function of automatically blocking and limiting the notch of the hook body, so as to effectively prevent the rope from falling off the hook body during lifting, and through automatic blocking, not only the labor of manual climbing and locking is reduced, but also the safety hazard of climbing is avoided.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: A self-locking device for a crane hook, comprising a hook body, wherein a self-locking mechanism is arranged inside the hook body, wherein the self-locking mechanism comprises a first arc-shaped sliding block, and the self-locking mechanism is used to implement a blocking and limiting action on the notch of the hook body, thereby preventing the rope sleeved in the hook body from falling off;

[0007] The two sides of the hook body are provided with symmetrically distributed rope limiting mechanisms, the rope limiting mechanisms include fixed blocks, and the rope limiting mechanisms are located on both sides of the self-locking mechanism, and the rope inserted into the hook body is clamped and limited by the rope limiting mechanisms, thereby reducing the inertial swing of the hanging object;

[0008] A lifting and positioning mechanism is arranged on the upper surface of the hook body, the lifting and positioning mechanism comprises a mounting block, and the lifting and positioning mechanism is located above the self-locking mechanism, and the lifting and positioning mechanism is used to lock and position the rotation of the hook body when the hook body lifts the suspended object for transportation.

[0009] Preferably, an arc-shaped cavity is provided inside the hook body, the outer surface of the first arc-shaped sliding block is slidably engaged with the inner wall of the arc-shaped cavity, a travel groove is provided on the inner surface of the hook body, a travel block is fixedly connected to the inner surface of the first arc-shaped sliding block, the outer surface of the travel block is slidably engaged with the inner wall of the travel groove, and the travel groove serves to limit and guide the movement of the travel block.

[0010] Preferably, one end of the travel block is fixedly connected to an arc-shaped bearing block, the lower end of the first arc-shaped sliding block is fixedly connected to a first arc-shaped locking rod, one end of the first arc-shaped locking rod passes through and extends to one end surface of the hook body, one end of the first arc-shaped locking rod is provided with an arc-shaped socket, the upper end of the first arc-shaped sliding block is fixedly connected to a first arc-shaped rack, and the inner wall of the arc-shaped cavity is slidably sleeved with a second arc-shaped sliding block, and the arc-shaped bearing block drives the travel block to move through the gravity of the rope and the suspended object.

[0011] Preferably, the lower end of the second arc-shaped sliding block is fixedly connected to a second arc-shaped rack, the upper end of the second arc-shaped sliding block is fixedly connected to a second arc-shaped locking rod, one end of the second arc-shaped locking rod passes through the other end surface of the hook body, and rotating rods are installed on the inner walls of both sides of the arc-shaped cavity through bearings, and a transmission gear is fixedly sleeved on the outer surface of the rotating rod, and the tooth surface of the transmission gear is respectively meshed with the tooth surface of the first arc-shaped rack and the tooth surface of the second arc-shaped rack, so that the first arc-shaped rack and the second arc-shaped rack can move synchronously in opposite directions through the transmission gear.

[0012] Preferably, the outer surface of the rotating rod is fixedly sleeved with a symmetrically distributed reset wheel, one side surface of the reset wheel is fixedly connected to a torsion spring, one end of the torsion spring is fixedly connected to an inner wall of one side of the arc-shaped cavity, one side surface of the fixed block is fixedly connected to a side surface of the hook body, the inner wall of the fixed block is movably sleeved with symmetrically distributed reset rods, one end of the two reset rods are fixedly connected with a baffle, the outer surface of the reset rod is movably sleeved with a contraction spring, and the torsion force of the torsion spring drives the rotating rod to reset and rotate through the reset wheel.

[0013] Preferably, one end of the two contraction springs is fixedly connected to the front side of the baffle, the other end of the two contraction springs is fixedly connected to the back side of the fixed block, the other end of the two reset rods is fixedly connected to the first arc-shaped clamping block, and the two side surfaces of the hook body are provided with symmetrically distributed arc-shaped movable grooves, one end of the arc-shaped movable groove is connected to the inner wall of one side of the arc-shaped cavity, and the inner wall of the arc-shaped movable groove is slidably connected to the second arc-shaped clamping block, and the inner surfaces of the second arc-shaped clamping block and the first arc-shaped clamping block are provided with soft anti-slip pads, so as to stably clamp and protect the rope.

[0014] Preferably, the opposing surfaces of the two second arc-shaped clamping blocks are respectively fixedly connected to the two side surfaces of the first arc-shaped sliding block, the inner bottom wall of the mounting block is fixedly connected to a ring-shaped adjustment tube, the upper end of the ring-shaped adjustment tube is fixedly connected to arc-shaped positioning blocks distributed in a ring array, the inner wall of the ring-shaped adjustment tube is provided with symmetrically distributed guide grooves, the inner wall of the guide groove is slidably connected to a guide slider, the opposing surfaces of the two guide sliders are fixedly connected to an adjustment ring, the outer surface of the adjustment ring is in contact with the inner wall of the ring-shaped adjustment tube, the guide groove and the guide slider are used in combination to cooperate with the adjustment ring for stable lifting and lowering movement.

[0015] Preferably, a connecting rod is installed on the inner wall of the adjusting ring through a damping bearing, and the lower end of the connecting rod is fixedly connected to a connecting seat, and the lower surface of the connecting seat is fixedly connected to the upper end of the hook body, and the upper end of the connecting rod is fixedly connected to a limit plate, and the lower surface of the limit plate is provided with arc-shaped positioning grooves distributed in a ring array, and the inner bottom wall of the mounting block is fixedly connected to support sleeves distributed in a ring array. When the hook body lifts the suspended object, its gravity drives the limit plate to move downward through the connecting seat and the connecting rod, thereby limiting the rotation of the hook body through the cooperation of the arc-shaped positioning groove.

[0016] Preferably, the inner bottom wall of the support sleeve is fixedly connected with a support spring, one end of the support spring is fixedly connected with a support rod, the outer surface of the support rod is movably sleeved with the inner wall of the support sleeve, one end of the multiple support rods is fixedly connected with an annular support block, the upper surface of the annular support block is provided with an annular slide groove, the inner wall of the annular slide groove is slidably sleeved with an arc-shaped limit slider distributed in a ring array, the upper surfaces of the multiple arc-shaped limit sliders are fixedly connected with the lower surface of the limit plate, the elastic force of the support spring plays a role in driving the annular support block to rise and reset through the support rod, and the support rod is guided to move through the support sleeve.

[0017] The present invention also provides a self-locking operation method of a self-locking device for a crane hook, and the specific drilling method is as follows: step 1, rotating the hook body and adjusting it to a suitable angle, when the hook body rotates, the connecting seat drives the connecting rod to rotate, the rotation of the connecting rod drives the limit plate to rotate, the rotation of the limit plate is stably rotated and adjusted by the cooperation of the annular slide groove and the arc-shaped limit slider, after the adjustment is completed, the hook body is preliminarily positioned by the sliding friction between the annular slide groove and the arc-shaped limit slider and the resistance of the damping bearing;

[0018] Step 2: Move the hook body to the rope hook of the hanging object, insert the rope through the notch of the hook body, and after the rope is located inside the arc-shaped bearing block, the hook body can be driven to rise and lift through the mounting block. The rising movement of the mounting block will cause the connecting rod to drive the two guide sliders to slide downward through the adjusting ring due to the gravity of the hanging object on the hook body, so that the connecting rod drives the limit plate to move downward, and the downward movement of the limit plate is limited by the arc-shaped positioning grooves and the arc-shaped positioning blocks, so that the rotation of the connecting rod is limited and locked, thereby limiting the rotation of the hook body;

[0019] Step three, after the locking is completed, the continuous rising of the mounting block drives the hook body to move upward. The rising movement of the hook body drives the arc-shaped bearing block to move due to the factors of the hanging objects under the rope. The movement of the arc-shaped bearing block drives the first arc-shaped sliding block to slide in the arc-shaped cavity through the cooperation of the travel block and the travel groove. The sliding of the first arc-shaped sliding block drives the first arc-shaped locking rod to extend outward, and also drives the first arc-shaped rack to move. The movement of the first arc-shaped rack drives the second arc-shaped rack to move through the meshing transmission gear. The rotation of the transmission gear drives the torsion spring to rotate and store energy through the cooperation of the rotating rod and the reset wheel. The movement of the second arc-shaped rack drives the second arc-shaped sliding block to move. The movement of the second arc-shaped sliding block drives the second arc-shaped locking rod to extend outward synchronously, and insert it into the arc-shaped insertion hole of the first arc-shaped locking rod, and the notch of the hook body is blocked and limited by the cooperation of the first arc-shaped locking rod and the second arc-shaped locking rod.

[0020] Step 4: When the gravity of the rope drives the arc-shaped bearing block to move to the specified position, the outer surface of the rope contacts the inner side of the first arc-shaped clamping block, and the first arc-shaped sliding block drives the second arc-shaped clamping block to squeeze and contact the outer surface of the rope through the cooperation of the arc-shaped sliding groove, and cooperates with the first arc-shaped clamping block to clamp and limit the rope, and the elastic force of the contraction spring cooperates with the reset rod to drive the first arc-shaped clamping block to move, thereby avoiding damage to the rope caused by hard clamping, and further restricting the movement of the suspended object by clamping the rope, which not only reduces the friction between the rope and the hook body, but also reduces the swing amplitude of the suspended object during hoisting and movement;

[0021] Step 5: After the suspended object is hoisted to the designated position, the hook body is lowered to disengage the rope from the arc-shaped bearing block. At this time, the rope pressure on the arc-shaped bearing block disappears, and the reset torque of the torsion spring drives the rotating rod to reset and rotate through the reset wheel. The rotation of the rotating rod drives the transmission gear to reset and rotate, thereby driving the meshed first arc-shaped rack and the second arc-shaped rack to reset and move. The first arc-shaped rack and the second arc-shaped rack drive the first arc-shaped locking rod and the second arc-shaped locking rod to reset through the first arc-shaped sliding block and the second arc-shaped sliding block, respectively. The reset movement of the first arc-shaped sliding block drives the second arc-shaped clamping block to disengage from clamping the rope;

[0022] Step six, at this time, the notch of the hook body is opened, and the hook body is moved to make the rope detach from the hook to complete the lifting operation. At the same time, when the gravity of the suspended object on the hook body disappears, the elastic force of the support spring drives the support rod to move upward, and the upward movement of the support rod drives the annular support block to rise and reset. The upward movement of the annular support block drives the limit plate to move upward through the cooperation of the annular slide groove and the arc-shaped limit slider, so that the arc-shaped positioning groove on the limit plate is detached from the arc-shaped positioning block. At this time, the hook body is free from the rotation restriction.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention realizes automatic blocking and limiting of the notch of the hook body through the self-locking mechanism, thereby effectively preventing the rope from falling off the hook body during hoisting, and through automatic blocking, not only the labor of manual climbing and locking is reduced, but also the safety hazard of climbing is avoided.

[0025] 2. The present invention uses a rope limiting mechanism to clamp and limit the rope inserted into the hook body. By clamping and limiting the rope, the swing amplitude of the suspended object is reduced during hoisting, and the sliding friction between the rope and the hook body when the suspended object swings is reduced, thereby improving the stability of the suspended object.

[0026] 3. The present invention realizes automatic limit locking when lifting the suspended object through the lifting positioning mechanism, thereby avoiding the rotation of the hook body, reducing the shaking of the suspended object by locking the hook body, and automatically canceling the lock after the lifting operation is completed, thereby facilitating the subsequent lifting angle adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 It is a three-dimensional diagram of the installation block structure of the present invention;

[0029] Figure 3 This is an exploded view of the limit plate structure of the present invention;

[0030] Figure 4 This is an exploded view of the support sleeve structure of the present invention;

[0031] Figure 5 This is a three-dimensional diagram of the first arc-shaped sliding block structure of the present invention;

[0032] Figure 6 This is a three-dimensional diagram of the hook body structure of the present invention;

[0033] Figure 7 This is a three-dimensional diagram of the first arc-shaped locking rod structure of the present invention;

[0034] Figure 8 It is a three-dimensional diagram of the transmission gear structure of the present invention;

[0035] Fig. 9 It is a three-dimensional diagram of the fixing block structure of the present invention.

[0036] In the figure: 1, hook body; 2, first arc-shaped sliding block; 21, arc-shaped cavity; 22, travel groove; 23, travel block; 24, arc-shaped bearing block; 25, first arc-shaped locking rod; 26, arc-shaped jack; 27, first arc-shaped rack; 28, second arc-shaped sliding block; 29, second arc-shaped rack; 210, second arc-shaped locking rod; 211, rotating rod; 212, transmission gear; 213, reset wheel; 214, torsion spring; 3, fixed block; 31, reset rod; 32, baffle; 33, retracting Compression spring; 34, first arc-shaped clamping block; 35, arc-shaped movable groove; 36, second arc-shaped clamping block; 4, mounting block; 41, annular adjustment tube; 42, arc-shaped positioning block; 43, guide slide groove; 44, guide slider; 45, adjustment ring; 46, connecting rod; 47, connecting seat; 48, limit plate; 49, arc-shaped positioning groove; 410, support sleeve; 411, support spring; 412, support rod; 413, annular support block; 414, annular slide groove; 415, arc-shaped limit slider. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0038] like Figures 1 to 9 As shown, the present invention provides a self-locking device for a crane hook, comprising a hook body 1, a self-locking mechanism is arranged inside the hook body 1, and the self-locking mechanism comprises a first arc-shaped sliding block 2, and the self-locking mechanism is used to implement a blocking and limiting action on the notch of the hook body 1, thereby preventing the rope sleeved in the hook body 1 from falling off;

[0039] The two sides of the hook body 1 are provided with symmetrically distributed rope limiting mechanisms, which include fixed blocks 3 and are located on both sides of the self-locking mechanism. The ropes inserted into the hook body 1 are clamped and limited by the rope limiting mechanisms, thereby reducing the inertial swing of the suspended object.

[0040] A lifting and positioning mechanism is provided on the upper surface of the hook body 1, the lifting and positioning mechanism includes a mounting block 4, and the lifting and positioning mechanism is located above the self-locking mechanism. The lifting and positioning mechanism is used to lock and position the rotation of the hook body 1 when the hook body 1 lifts the suspended object for transportation.

[0041] The above scheme is adopted: through the coordinated use of the self-locking mechanism, the telescopic limiting mechanism and the lifting positioning mechanism, the hook body 1 is locked during hoisting to reduce the shaking of the suspended object, the swing amplitude of the suspended object is reduced by clamping and limiting the rope, and the stability of the hoisting of the suspended object is improved. In addition, the notch of the hook body 1 is automatically blocked and limited, so that the rope can be effectively prevented from falling off the hook body 1 during hoisting, which not only reduces the labor of manual climbing and locking, but also avoids the safety hazards of climbing.

[0042] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, an arc-shaped cavity 21 is provided inside the hook body 1, the outer surface of the first arc-shaped sliding block 2 is slidably sleeved with the inner wall of the arc-shaped cavity 21, a travel groove 22 is provided on the inner side surface of the hook body 1, a travel block 23 is fixedly connected to the inner side surface of the first arc-shaped sliding block 2, the outer surface of the travel block 23 is slidably inserted with the inner wall of the travel groove 22, one end of the travel block 23 is fixedly connected to an arc-shaped bearing block 24, the lower end of the first arc-shaped sliding block 2 is fixedly connected to a first arc-shaped locking rod 25, one end of the first arc-shaped locking rod 25 passes through and extends to one end surface of the hook body 1, one end of the first arc-shaped locking rod 25 is provided with an arc-shaped plug hole 26, the upper end of the first arc-shaped sliding block 2 is fixedly connected to a first arc-shaped rack 27, and the inner wall of the arc-shaped cavity 21 is slidably sleeved with the first arc-shaped rack 27. Two arc-shaped sliding blocks 28, the lower end of the second arc-shaped sliding block 28 is fixedly connected with the second arc-shaped rack 29, the upper end of the second arc-shaped sliding block 28 is fixedly connected with the second arc-shaped locking rod 210, one end of the second arc-shaped locking rod 210 passes through the other end surface of the hook body 1, and the inner walls on both sides of the arc-shaped cavity 21 are installed with rotating rods 211 through bearings, and the outer surface of the rotating rod 211 is fixedly sleeved with a transmission gear 212, and the tooth surfaces of the transmission gear 212 are respectively meshed with the tooth surfaces of the first arc-shaped rack 27 and the tooth surfaces of the second arc-shaped rack 29, and the outer surface of the rotating rod 211 is fixedly sleeved with a symmetrically distributed reset wheel 213, and a torsion spring 214 is fixedly connected to the surface of one side of the reset wheel 213, and one end of the torsion spring 214 is fixedly connected to the inner wall of one side of the arc-shaped cavity 21.

[0043] The above scheme is adopted: the upward movement of the hook body 1 drives the arc-shaped bearing block 24 to move due to the factors in the hanging object below the rope, and the movement of the arc-shaped bearing block 24 drives the first arc-shaped sliding block 2 to slide in the arc-shaped cavity 21 through the cooperation of the travel block 23 and the travel groove 22. The sliding of the first arc-shaped sliding block 2 drives the first arc-shaped locking rod 25 to extend outward, and also drives the first arc-shaped rack 27 to move. The movement of the first arc-shaped rack 27 drives the second arc-shaped rack 29 to move through the meshing transmission gear 212. The rotation of the transmission gear 212 drives the torsion spring 214 to rotate and store energy through the cooperation of the transmission rod and the reset wheel 213. The movement of the second arc-shaped rack 29 drives the second arc-shaped sliding block 28 to move. The movement of the second arc-shaped sliding block 28 drives the second arc-shaped locking rod 210 to extend outward synchronously and insert it into the arc-shaped insertion hole 2 of the first arc-shaped locking rod 25. 6, the notch of the hook body 1 is blocked and limited by the cooperation of the first arc-shaped locking rod 25 and the second arc-shaped locking rod 210. When the suspended object is hoisted to the specified position, the rope is separated from the arc-shaped bearing block 24 by the downward movement of the hook body 1. At this time, the rope pressure on the arc-shaped bearing block 24 disappears, and the reset torque of the torsion spring 214 drives the rotating rod 211 to reset and rotate through the reset wheel 213. The rotation of the transmission rod drives the transmission gear 212 to reset and rotate, thereby driving the meshing first arc-shaped rack 27 and the second arc-shaped rack 29 to reset and move. The first arc-shaped rack 27 and the second arc-shaped rack 29 respectively drive the first arc-shaped locking rod 25 and the second arc-shaped locking rod 210 to reset through the first arc-shaped sliding block 2 and the second arc-shaped sliding block. At this time, the notch of the hook body 1 is opened, and the rope is separated from the hook by moving the hook body 1 to complete the hoisting operation.

[0044] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Fig. 9 As shown, one side surface of the fixed block 3 is fixedly connected to one side surface of the hook body 1, the inner wall of the fixed block 3 is movably sleeved with a symmetrically distributed reset rod 31, one end of the two reset rods 31 is fixedly connected to a baffle 32, the outer surface of the reset rod 31 is movably sleeved with a contraction spring 33, one end of the two contraction springs 33 is fixedly connected to the front side of the baffle 32, the other end of the two contraction springs 33 is fixedly connected to the back side of the fixed block 3, the other end of the two reset rods 31 is fixedly connected to a first arc-shaped clamping block 34, and symmetrically distributed arc-shaped movable grooves 35 are provided on both side surfaces of the hook body 1, one end of the arc-shaped movable groove 35 is connected to an inner wall of one side of the arc-shaped cavity 21, and the inner wall of the arc-shaped movable groove 35 is slidably connected with a second arc-shaped clamping block 36, and the opposite surfaces of the two second arc-shaped clamping blocks 36 are respectively fixedly connected to the two side surfaces of the first arc-shaped sliding block 2.

[0045] The above scheme is adopted: when the gravity of the rope drives the arc-shaped bearing block 24 to move to the specified position, the outer surface of the rope contacts the inner side of the first arc-shaped clamping block 34, and the first arc-shaped sliding block 2 drives the second arc-shaped clamping block 36 to squeeze and contact the outer surface of the rope through the cooperation of the arc-shaped sliding groove, and cooperates with the first arc-shaped clamping block 34 to clamp and limit the rope. The elastic force of the contraction spring 33 cooperates with the reset rod 31 to drive the first arc-shaped clamping block 34 to move, thereby avoiding damage to the rope caused by hard clamping. By clamping the rope, the movement of the suspended object is further restricted, which not only reduces the friction between the rope and the hook body 1, but also reduces the swing amplitude of the suspended object during hoisting and movement.

[0046] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the inner bottom wall of the mounting block 4 is fixedly connected with an annular adjustment tube 41, the upper end of the annular adjustment tube 41 is fixedly connected with an arc-shaped positioning block 42 distributed in an annular array, the inner wall of the annular adjustment tube 41 is provided with a symmetrically distributed guide slot 43, the inner wall of the guide slot 43 is slidably connected with a guide slider 44, the opposite surfaces of the two guide sliders 44 are fixedly connected with an adjustment ring 45, the outer surface of the adjustment ring 45 contacts the inner wall of the annular adjustment tube 41, the inner wall of the adjustment ring 45 is installed with a connecting rod 46 through a damping bearing, the lower end of the connecting rod 46 is fixedly connected with a connecting seat 47, the lower surface of the connecting seat 47 is fixedly connected to the upper end of the hook body 1, the upper end of the connecting rod 46 is fixedly connected with a limit plate 48, the limit plate The lower surface of 48 is provided with arc-shaped positioning grooves 49 distributed in a circular array, the inner bottom wall of the mounting block 4 is fixedly connected with support sleeves 410 distributed in a circular array, the inner bottom wall of the support sleeve 410 is fixedly connected with a support spring 411, one end of the support spring 411 is fixedly connected with a support rod 412, the outer surface of the support rod 412 is movably sleeved with the inner wall of the support sleeve 410, one end of multiple support rods 412 is fixedly connected with an annular support block 413, the upper surface of the annular support block 413 is provided with an annular slide groove 414, the inner wall of the annular slide groove 414 is slidably sleeved with arc-shaped limit sliders 415 distributed in a circular array, and the upper surfaces of multiple arc-shaped limit sliders 415 are all fixedly connected to the lower surface of the limit plate 48.

[0047] The above scheme is adopted: the hook body 1 is rotated and adjusted to a suitable angle. When the hook body 1 rotates, the connecting rod 46 is driven to rotate through the connecting seat 47, and the rotation of the connecting rod 46 drives the limit plate 48 to rotate. The rotation of the limit plate 48 is stably rotated and adjusted through the cooperation of the annular slide groove 414 and the arc-shaped limit slider 415. After the adjustment is completed, the hook body 1 is initially positioned through the sliding friction between the annular slide groove 414 and the arc-shaped limit slider 415 and the resistance of the damping bearing. During hoisting, the upward movement of the mounting block 4 will cause the connecting rod 46 to drive the two guide sliders 44 to slide downward through the adjusting ring 45 due to the gravity of the hanging object on the hook body 1, so that the connecting rod 46 drives the limit The plate 48 moves downward, and the downward movement of the limit plate 48 is limited by the multiple arc-shaped positioning grooves 49 and the arc-shaped positioning block 42, so that the rotation of the connecting rod 46 is limited and locked, thereby limiting the rotation of the hook body 1. When the gravity of the suspended object on the hook body 1 disappears, the support rod 412 is driven to move upward by the elastic force of the support spring 411, and the upward movement of the support rod 412 drives the annular support block 413 to rise and reset. The upward movement of the annular support block 413 drives the limit plate 48 to move upward through the cooperation of the annular slide groove 414 and the arc-shaped limiting slider 415, so that the arc-shaped positioning groove 49 on the limit plate 48 is separated from the arc-shaped positioning block 42, and at this time the hook body 1 is free from the rotation restriction. Embodiment 2

[0048] like Figures 1 to 9 As shown, a self-locking operation method of a self-locking device for a crane hook, step 1, rotate the hook body 1 and adjust it to a suitable angle. When the hook body 1 rotates, the connecting seat 47 drives the connecting rod 46 to rotate, and the rotation of the connecting rod 46 drives the limit plate 48 to rotate. The rotation of the limit plate 48 is stably rotated and adjusted by the cooperation of the annular slide groove 414 and the arc-shaped limit slider 415. After the adjustment is completed, the hook body 1 is preliminarily positioned by the sliding friction between the annular slide groove 414 and the arc-shaped limit slider 415 and the resistance of the damping bearing;

[0049] Step 2, move the hook body 1 to the rope hook of the hanging object, insert the rope through the notch of the hook body 1, and after the rope is located inside the arc-shaped bearing block 24, the hook body 1 can be driven to rise and lift through the mounting block 4. The rising movement of the mounting block 4 will cause the connecting rod 46 to drive the two guide sliders 44 to slide downward through the adjusting ring 45 due to the gravity of the hanging object on the hook body 1, so that the connecting rod 46 drives the limit plate 48 to move downward, and the downward movement of the limit plate 48 is limited by the arc-shaped positioning grooves 49 and the arc-shaped positioning block 42, so that the rotation of the connecting rod 46 is limited and locked, thereby limiting the rotation of the hook body 1;

[0050] Step 3, after locking is completed, the continuous rise of the mounting block 4 drives the hook body 1 to move upward. The rising movement of the hook body 1 drives the arc-shaped bearing block 24 to move due to the hanging object under the rope. The movement of the arc-shaped bearing block 24 drives the first arc-shaped sliding block 2 to slide in the arc-shaped cavity 21 through the cooperation of the travel block 23 and the travel groove 22. The sliding of the first arc-shaped sliding block 2 drives the first arc-shaped locking rod 25 to extend outward, and also drives the first arc-shaped rack 27 to move. The movement of the first arc-shaped rack 27 is driven by the meshing transmission gear 212 drives the second arc-shaped rack 29 to move, and the rotation of the transmission gear 212 drives the torsion spring 214 to rotate and store energy through the cooperation of the rotating rod 211 and the reset wheel 213. The movement of the second arc-shaped rack 29 drives the second arc-shaped sliding block 28 to move, and the movement of the second arc-shaped sliding block 28 drives the second arc-shaped locking rod 210 to extend outward synchronously and insert it into the arc-shaped insertion hole 26 of the first arc-shaped locking rod 25. The notch of the hook body 1 is blocked and limited by the cooperation of the first arc-shaped locking rod 25 and the second arc-shaped locking rod 210;

[0051] Step 4: When the gravity of the rope drives the arc-shaped bearing block 24 to move to the specified position, the outer surface of the rope contacts the inner side of the first arc-shaped clamping block 34, and the first arc-shaped sliding block 2 drives the second arc-shaped clamping block 36 to squeeze and contact the outer surface of the rope through the cooperation of the arc-shaped sliding groove, and cooperates with the first arc-shaped clamping block 34 to clamp and limit the rope. The elastic force of the contraction spring 33 cooperates with the reset rod 31 to drive the first arc-shaped clamping block 34 to move, thereby avoiding damage to the rope caused by hard clamping. The clamping of the rope further limits the movement of the suspended object, which not only reduces the friction between the rope and the hook body 1, but also reduces the swing amplitude of the suspended object during hoisting and movement.

[0052] Step 5, when the suspended object is hoisted to the designated position, the hook body 1 is moved downward to make the rope detach from the arc-shaped bearing block 24. At this time, the rope pressure on the arc-shaped bearing block 24 disappears, and the reset torque of the torsion spring 214 drives the rotating rod 211 to reset and rotate through the reset wheel 213. The rotation of the rotating rod 211 drives the transmission gear 212 to reset and rotate, thereby driving the meshing first arc-shaped rack 27 and the second arc-shaped rack 29 to reset and move. The first arc-shaped rack 27 and the second arc-shaped rack 29 drive the first arc-shaped locking rod 25 and the second arc-shaped locking rod 210 to reset through the first arc-shaped sliding block 2 and the second arc-shaped sliding block, respectively. The reset movement of the first arc-shaped sliding block 2 drives the second arc-shaped clamping block 36 to disengage from clamping the rope;

[0053] Step six, at this time, the gap of the hook body 1 is opened, and the hook body 1 is moved to make the rope detach from the hook to complete the lifting operation. At the same time, when the gravity of the suspended object on the hook body 1 disappears, the support rod 412 is driven to move upward through the elastic force of the support spring 411, and the upward movement of the support rod 412 drives the annular support block 413 to rise and reset, and the upward movement of the annular support block 413 drives the limit plate 48 to move upward through the cooperation of the annular slide groove 414 and the arc-shaped limit slider 415, so that the arc-shaped positioning groove 49 on the limit plate 48 is detached from the arc-shaped positioning block 42, and the hook body 1 is now free from the rotation restriction.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking device for a crane hook, characterized in that: The hook body (1) comprises a self-locking mechanism disposed inside the hook body (1), the self-locking mechanism comprising a first arc-shaped sliding block (2), and the self-locking mechanism is used to implement a blocking and limiting action on the notch of the hook body (1), thereby preventing the rope sleeved inside the hook body (1) from falling off; The two sides of the hook body (1) are provided with symmetrically distributed rope limiting mechanisms, the rope limiting mechanisms comprising fixed blocks (3), and the rope limiting mechanisms are located on both sides of the self-locking mechanism, and the rope inserted into the hook body (1) is clamped and limited by the rope limiting mechanisms, thereby reducing the inertial swing of the suspended object; The upper surface of the hook body (1) is provided with a lifting and positioning mechanism, the lifting and positioning mechanism comprising a mounting block (4), and the lifting and positioning mechanism is located above the self-locking mechanism, and the lifting and positioning mechanism is used to lock and position the rotation of the hook body (1) when the hook body (1) is lifting a suspended object for transportation; The hook body (1) has an arc-shaped cavity (21) formed inside, the outer surface of the first arc-shaped sliding block (2) is slidably sleeved with the inner wall of the arc-shaped cavity (21), the inner surface of the hook body (1) has a travel groove (22), the inner surface of the first arc-shaped sliding block (2) is fixedly connected with a travel block (23), and the outer surface of the travel block (23) is slidably sleeved with the inner wall of the travel groove (22); One end of the travel block (23) is fixedly connected to an arc-shaped bearing block (24), the lower end of the first arc-shaped sliding block (2) is fixedly connected to a first arc-shaped locking rod (25), one end of the first arc-shaped locking rod (25) penetrates and extends to an end surface of the hook body (1), one end of the first arc-shaped locking rod (25) is provided with an arc-shaped insertion hole (26), the upper end of the first arc-shaped sliding block (2) is fixedly connected to a first arc-shaped rack (27), and the inner wall of the arc-shaped cavity (21) is slidably sleeved with a second arc-shaped sliding block (28); The lower end of the second arc-shaped sliding block (28) is fixedly connected to a second arc-shaped rack (29), the upper end of the second arc-shaped sliding block (28) is fixedly connected to a second arc-shaped locking rod (210), one end of the second arc-shaped locking rod (210) passes through the other end surface of the hook body (1), and the inner walls on both sides of the arc-shaped cavity (21) are both installed with rotating rods (211) through bearings, and the outer surface of the rotating rod (211) is fixedly sleeved with a transmission gear (212), and the tooth surface of the transmission gear (212) is respectively meshed with the tooth surface of the first arc-shaped rack (27) and the tooth surface of the second arc-shaped rack (29); The outer surface of the rotating rod (211) is fixedly sleeved with symmetrically distributed reset wheels (213), one side surface of the reset wheel (213) is fixedly connected with a torsion spring (214), one end of the torsion spring (214) is fixedly connected to one side inner wall of the arc-shaped cavity (21), one side surface of the fixed block (3) is fixedly connected to one side surface of the hook body (1), the inner wall of the fixed block (3) is movably sleeved with symmetrically distributed reset rods (31), one end of each of the two reset rods (31) is fixedly connected with a baffle (32), and the outer surface of the reset rod (31) is movably sleeved with a contraction spring (33); One end of the two contraction springs (33) is fixedly connected to the front side of the baffle (32), the other end of the two contraction springs (33) is fixedly connected to the back side of the fixed block (3), the other end of the two reset rods (31) is fixedly connected to the first arc-shaped clamping block (34), and the two side surfaces of the hook body (1) are provided with symmetrically distributed arc-shaped movable grooves (35), one end of the arc-shaped movable groove (35) is connected to the inner wall of one side of the arc-shaped cavity (21), and the inner wall of the arc-shaped movable groove (35) is slidably connected to the second arc-shaped clamping block (36); The opposing surfaces of the two second arc-shaped clamping blocks (36) are respectively fixedly connected to the two side surfaces of the first arc-shaped sliding block (2); the inner bottom wall of the mounting block (4) is fixedly connected to an annular adjustment tube (41); the upper end of the annular adjustment tube (41) is fixedly connected to arc-shaped positioning blocks (42) distributed in an annular array; the inner wall of the annular adjustment tube (41) is provided with symmetrically distributed guide grooves (43); the inner wall of the guide groove (43) is slidably connected to a guide slider (44); the opposing surfaces of the two guide sliders (44) are fixedly connected to an adjustment ring (45); the outer surface of the adjustment ring (45) contacts the inner wall of the annular adjustment tube (41); The inner wall of the adjusting ring (45) is provided with a connecting rod (46) via a damping bearing, the lower end of the connecting rod (46) is fixedly connected to a connecting seat (47), the lower surface of the connecting seat (47) is fixedly connected to the upper end of the hook body (1), the upper end of the connecting rod (46) is fixedly connected to a limiting plate (48), the lower surface of the limiting plate (48) is provided with arc-shaped positioning grooves (49) distributed in a circular array, and the inner bottom wall of the mounting block (4) is fixedly connected to supporting sleeves (410) distributed in a circular array; The inner bottom wall of the support sleeve (410) is fixedly connected to a support spring (411), one end of the support spring (411) is fixedly connected to a support rod (412), the outer surface of the support rod (412) is movably sleeved with the inner wall of the support sleeve (410), one end of a plurality of the support rods (412) is fixedly connected to an annular support block (413), an annular groove (414) is provided on the upper surface of the annular support block (413), the inner wall of the annular groove (414) is slidably sleeved with arc-shaped limiting sliders (415) distributed in an annular array, and the upper surfaces of the plurality of arc-shaped limiting sliders (415) are all fixedly connected to the lower surface of the limiting plate (48).

2. A self-locking operation method for a crane hook, using the self-locking device according to claim 1, characterized in that: include: Step 1, rotating the hook body (1) and adjusting it to a suitable angle. When the hook body (1) rotates, the connecting seat (47) drives the connecting rod (46) to rotate. The rotation of the connecting rod (46) drives the limit plate (48) to rotate. The rotation of the limit plate (48) is adjusted to a stable rotation through the cooperation of the annular slide groove (414) and the arc-shaped limit slider (415). After the adjustment is completed, the hook body (1) is initially positioned through the sliding friction between the annular slide groove (414) and the arc-shaped limit slider (415) and the resistance of the damping bearing; Step 2, move the hook body (1) to the rope hook of the hanging object, insert the rope through the notch of the hook body (1), and after the rope is located inside the arc-shaped bearing block (24), the hook body (1) can be driven to rise and lift through the mounting block (4). The upward movement of the mounting block (4) will cause the connecting rod (46) to drive the two guide sliders (44) to slide downward through the adjusting ring (45) due to the gravity of the hanging object on the hook body (1), so that the connecting rod (46) drives the limit plate (48) to move downward. The downward movement of the limit plate (48) is limited by the multiple arc-shaped positioning grooves (49) and the arc-shaped positioning block (42), so that the rotation of the connecting rod (46) is limited and locked, thereby limiting the rotation of the hook body (1); Step 3, after the locking is completed, the continuous rise of the mounting block (4) drives the hook body (1) to move upward. The rising movement of the hook body (1) drives the arc-shaped bearing block (24) to move due to the factors of the hanging objects under the rope. The movement of the arc-shaped bearing block (24) drives the first arc-shaped sliding block (2) to slide in the arc-shaped cavity (21) through the cooperation of the travel block (23) and the travel groove (22). The sliding of the first arc-shaped sliding block (2) drives the first arc-shaped locking rod (25) to extend outward, and also drives the first arc-shaped rack (27) to move. The movement of the first arc-shaped rack (27) is driven by the meshing transmission gear (2 12) drives the second arc-shaped rack (29) to move, the rotation of the transmission gear (212) drives the torsion spring (214) to rotate and store energy through the cooperation of the rotating rod (211) and the reset wheel (213), the movement of the second arc-shaped rack (29) drives the second arc-shaped sliding block (28) to move, the movement of the second arc-shaped sliding block (28) drives the second arc-shaped locking rod (210) to extend outward synchronously and insert it into the arc-shaped insertion hole (26) of the first arc-shaped locking rod (25), and the notch of the hook body (1) is blocked and limited through the cooperation of the first arc-shaped locking rod (25) and the second arc-shaped locking rod (210); Step 4: When the gravity of the rope drives the arc-shaped bearing block (24) to move to the specified position, the outer surface of the rope contacts the inner side of the first arc-shaped clamping block (34), and the first arc-shaped sliding block (2) drives the second arc-shaped clamping block (36) to squeeze and contact the outer surface of the rope through the cooperation of the arc-shaped sliding groove, and cooperates with the first arc-shaped clamping block (34) to clamp and limit the rope. The elastic force of the contraction spring (33) cooperates with the reset rod (31) to drive the first arc-shaped clamping block (34) to move, thereby avoiding damage to the rope caused by hard clamping. By clamping the rope, the movement of the suspended object is further restricted, which not only reduces the friction between the rope and the hook body (1), but also reduces the swing amplitude of the suspended object during hoisting and movement; Step 5, when the suspended object is hoisted to the designated position, the hook body (1) is moved downward to release the rope from the arc-shaped bearing block (24). At this time, the rope pressure on the arc-shaped bearing block (24) disappears, and the reset torque of the torsion spring (214) drives the rotating rod (211) to reset and rotate through the reset wheel (213). The rotation of the rotating rod (211) drives the transmission gear (212) to reset and rotate, thereby driving the meshing first arc-shaped rack (27) and the second arc-shaped rack (29) to reset and move. The first arc-shaped rack (27) and the second arc-shaped rack (29) respectively drive the first arc-shaped locking rod (25) and the second arc-shaped locking rod (210) to reset through the first arc-shaped sliding block (2) and the second arc-shaped sliding block. The reset movement of the first arc-shaped sliding block (2) drives the second arc-shaped clamping block (36) to release the clamping of the rope; Step 6: At this time, the notch of the hook body (1) is opened, and the hook body (1) is moved to make the rope detach from the hook, completing the lifting operation. At the same time, when the gravity of the suspended object on the hook body (1) disappears, the elastic force of the support spring (411) drives the support rod (412) to move upward, and the upward movement of the support rod (412) drives the annular support block (413) to rise and reset. The upward movement of the annular support block (413) drives the limit plate (48) to move upward through the cooperation of the annular slide groove (414) and the arc-shaped limit slider (415), so that the arc-shaped positioning groove (49) on the limit plate (48) is detached from the arc-shaped positioning block (42). At this time, the hook body (1) is free from the rotation restriction.

Images