An automatically leveling lifting bracket

Abstract

The present invention discloses a lifting bracket with automatic leveling, belonging to the field of lifting equipment. When it is inclined during placement, the weight of the leveling ball pulls the abutting block, causing the abutting block to separate from the abutting teeth of the leveling leg. At this time, under the influence of gravity, the support leg slides along the leveling leg, causing the support plate to rotate. As the support plate gradually rotates to a horizontal state, the leveling ball slowly centers under the influence of gravity, causing the component force on the pulling rope to start decreasing, prompting the spring to push the abutting block to move. When the abutting block contacts the leveling leg, the abutting teeth on the leveling leg abut against the abutting block, causing part of the force of the spring to be shared by the abutting teeth and the spring to be compressed again. At this time, when the leveler on the support leg reaches the horizontal position, the leveler clamps the pulling rope, causing the pulling rope not to pull the abutting block, and at the same time, the spring is also in a balanced state under the component force of the abutting teeth. At this time, the load-bearing plate will just be in a horizontal state, achieving the effect that the bracket can be automatically leveled after the worker places it.

Description

Technical Field

[0001] The present invention discloses a lifting bracket with automatic leveling, belonging to the field of lifting equipment. Background Art

[0002] A lifting bracket is a bracket used for hoisting heavy objects or serving as the bottom support of a jack at a construction site.

[0003] When the existing lifting bracket is in use, it needs to be leveled manually. If it is not leveled, when lifting heavy objects, it is easy to occur that the force is uneven and the bracket topples over, or the force is concentrated and the lifting bracket is broken. When the lifting bracket is hoisting heavy objects, the toppling or breaking of the heavy object together with the bracket will cause damage to the object at least and safety accidents at worst.

[0004] A new solution is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a lifting bracket with automatic leveling to solve the above problems.

[0006] The present invention realizes the above purpose through the following technical solutions. A lifting bracket with automatic leveling includes a load-bearing plate and three support legs rotatably connected to the load-bearing plate. A leveling leg is slidably arranged inside the support leg. An abutting tooth is arranged on the leveling leg. An abutting block for abutting against the abutting tooth is slidably arranged on the support leg. A spring is sleeved in the middle of the abutting block. One ends of the abutting blocks on three different support legs away from the leveling leg are fixed with a leveling ball through a pull rope. A leveler for clamping the pull rope is arranged on the support leg. When the gravity received by the leveling ball and the gravity received by the load-bearing plate are on the same vertical line, the external force received by the abutting block causes it to maintain a relatively static state. The leveler includes a liquid storage cylinder, a sliding cylinder communicated with the liquid storage cylinder, and a floating locking block slidably arranged in the sliding cylinder. The floating locking block can abut against the pull rope.

[0007] Preferably, an air release hole is formed on the support leg, and a slow-release valve for restricting the air flow rate is installed on the air release hole. A sealing gasket for closing the internal space of the support leg is sleeved on the surface of the leveling leg.

[0008] Preferably, a protrusion for sealing the internal space of the support leg is arranged on the abutting block, and the sliding distance between the protrusion and the support leg in a fitting manner is less than the maximum stroke of the abutting block.

[0009] Preferably, a receiving groove for receiving the leveling ball is formed in the middle of the load-bearing plate. A pushing block for pushing the leveling ball into the receiving groove is arranged on the support leg. The pushing block can extend into the receiving groove when the support leg is in a retracted state.

[0010] Preferably, a rubber constriction is provided at the opening of the receiving groove, and the elastic force of the rubber constriction is greater than or equal to the gravity of the leveling ball.

[0011] Preferably, a lock is threadedly connected to the leveler. One end of the lock can move to abut against the abutting block, and the other end passes through the leveler to form a rotating piece.

[0012] Preferably, the load-bearing plate is detachably connected to a hoisting plate, and the hoisting plate can be connected to the load-bearing plate through a chain.

[0013] Preferably, a chuck groove is provided on the load-bearing plate, and a centering chuck is slidably arranged in the chuck groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: When it is inclined during placement, the weight of the leveling ball is used to pull the abutting block, causing the abutting block to separate from the abutting teeth of the leveling leg. At this time, under the influence of gravity, the support leg slides along the leveling leg, causing the support plate to rotate. As the support plate gradually rotates to a horizontal state, the leveling ball slowly centers under the influence of gravity, causing the component force on the pulling rope to start to decrease, prompting the spring to push the abutting block to move. When the abutting block contacts the leveling leg, the abutting teeth on the leveling leg abut against the abutting block, causing a part of the force of the spring to be shared by the abutting teeth, and the spring is compressed again. At this time, when the leveler on the support leg reaches the horizontal position, the leveler clamps the pulling rope, causing the pulling rope not to pull the abutting block, and at the same time, the spring is also in a balanced state under the component force of the abutting teeth. At this time, the load-bearing plate will just be in a horizontal state, achieving the effect that the worker can automatically level the bracket after placing it. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic cross-sectional structure diagram of the support leg;

[0016] Figure 2 is a schematic structure diagram of the support leg;

[0017] Figure 3 is a schematic structure diagram of the present invention;

[0018] Figure 4 is a schematic structure diagram of the present invention in a hoisting state;

[0019] Figure 5 is Figure 1 a partial enlarged view.

[0020] Reference numerals: 1, load-bearing plate; 2, support leg; 201, slow-release valve; 3, leveling leg; 4, abutting block; 401, protrusion; 5, floating locking block; 6, liquid storage cylinder; 7, pulling rope; 8, rotating piece; 9, pushing block; 10, hoisting plate; 11, centering chuck; 12, leveling ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0022] As Figure 1 , Figure 2 , Figure 3 , Figure 4 shown, an automatically leveling lifting bracket includes a load-bearing plate 1 and three support legs 2 rotatably connected to the load-bearing plate 1. A leveling leg 3 is slidably arranged in the support leg 2. An abutting tooth is arranged on the leveling leg 3. An abutting block 4 for abutting against the abutting tooth is slidably arranged on the support leg 2. A spring is sleeved in the middle of the abutting block 4. One end of the abutting blocks 4 on three different support legs 2 away from the leveling leg 3 is fixed with a leveling ball 12 through a pulling rope 7. A leveler for clamping the pulling rope 7 is arranged on the support leg 2. When the gravity received by the leveling ball 12 and the gravity received by the load-bearing plate 1 are on the same vertical line, the external force received by the abutting block 4 causes it to maintain a relatively static state. The leveler includes a liquid storage cylinder 6, a sliding cylinder communicated with the liquid storage cylinder 6, and a floating locking block 5 slidably arranged in the sliding cylinder. The floating locking block 5 can abut against the pulling rope 7.

[0023] When using this product, first pull out the leveling leg 3, and pull one of the leveling legs 3 to the specified length. Then pull the other two leveling legs 3 to a length exceeding the specified length, and then place it at the object to be lifted or supported. Since it is impossible to determine whether the ground is flat, after the bracket is placed, the two support legs 2 with the longer overall length of the support legs 2 and the leveling legs 3 extended will cause the load-bearing plate 1 to tilt, and at the same time cause the gravity to approach the support leg 2 at the shorter end, resulting in a decrease in the force of the pulling rope 7 on the shorter support leg 2 pulling the leveling ball 12, prompting an increase in the pulling force received by the pulling ropes 7 on the longer two support legs 2, and then pulling out the abutting block 4, causing the abutting block 4 to separate from the abutting teeth. After the abutting teeth are separated, at this time, affected by gravity, the support leg 2 will slide along the leveling leg 3. As the height of the support leg 2 decreases, when the leveling device connection surfaces on the three support legs 2 slowly approach the horizontal plane, the liquid in the liquid storage cylinder 6 flows into the sliding cylinder under the influence of gravity, causing the liquid in the sliding cylinder to increase, thereby realizing the rise of the liquid level. As the liquid level rises, the floating locking block 5 is pushed by the liquid to slide until the locking block clamps the pulling rope 7 when the leveling devices on the three support legs 2 are in the same straight line position, so that the gravity of the leveling ball 12 is offset by the clamping force of the locking block. During the process of the leveling device connection surfaces on the three support legs 2 slowly approaching the horizontal plane, the gravity direction of the leveling ball 12 continuously approaches the gravity direction received by the load-bearing plate 1. At this time, due to the movement of the leveling ball 12, the pulling forces received by the three pulling ropes 7 respectively connected to the abutting blocks 4 on different support legs 2 tend to be equal. When the component force is equal to the sum of the elastic force of the spring and the abutting force of the leveling leg 3 on the abutting block 4, at this time, since the abutting block 4 abuts against the abutting teeth, the support leg 2 receives a supporting force, and at this time, the load-bearing plate 1 is in a horizontal position, completing the self-leveling effect of this product. After the product is leveled, if hoisting operations need to be carried out, it can be done by installing the hoisting plate 10 and then hanging a hoist on the hoisting plate 10. When jacking operations are required, only need to place the jack on the load-bearing plate 1 and fix it, and then it can be carried out. Since the force of this product is centered after automatic leveling, there will be no situation of tipping caused by eccentric force.

[0024] The support leg 2 is provided with an air release hole, and a slow-release valve 201 for restricting the air flow rate is installed on the air release hole. The surface of the leveling leg 3 is sleeved with a sealing gasket for closing the internal space of the support leg 2. The sealing gasket can separate the internal air from the outside world, and the slow-release valve 201 can slowly discharge the air, thereby avoiding the untimely reaction of the abutting block 4 caused by falling too fast during leveling.

[0025] The abutment block 4 is provided with a protrusion 401 for sealing the internal space of the supporting leg 2. The sliding distance between the protrusion 401 and the supporting leg 2 is less than the maximum stroke of the abutment block 4. The abutment block 4 is pulled to slide until the protrusion 401 is separated from the supporting leg 2, thereby connecting the outside world with the internal space of the supporting leg 2, so that air can be directly exchanged, making it more convenient to extend and retract the leveling leg 3.

[0026] A receiving groove for receiving the leveling ball 12 is formed in the middle of the load-bearing plate 1, and a pushing block 9 is provided on the supporting leg 2 for pushing the leveling ball 12 into the receiving groove. The pushing block 9 can extend into the receiving groove when the supporting leg 2 is in the storage state. During operation, the pushing block 9 is used to push the leveling ball 12 so that the leveling ball 12 is pushed into the receiving groove. When the leveling ball 12 is pushed in, the leveling ball 12 pulls the pull rope 7, so that the pull rope 7 pulls the protrusion 401 of the abutment block 4 to slide out of the supporting leg 2. At this time, the leveling leg 3 can be pulled out of the supporting leg 2. At this time, since the protrusion 401 is not in contact with the supporting leg 2, air can be quickly replenished into the supporting leg 2, and then the supporting leg 2 is separated. When separating, the protrusion 401 on the supporting leg 2 moves to the outside of the receiving groove. At the same time, since the protrusion 401 pushes the leveling ball 12, the leveling ball 12 will Under the elastic force of the spring and the gravity, when the gravity ball falls, the abutment block 4 is pushed into the supporting leg 2 by the thrust of the spring, thereby separating the supporting leg 2 from the outside world. At this time, you only need to place the leveling leg 3 on the ground for use; and when storing, you only need to manually pick up the leveling ball 12 and then put it into the receiving groove, and then merge the supporting leg 2. At this time, the pushing block 9 on the supporting leg 2 will push the leveling ball 12, so that the leveling ball 12 is pushed into the receiving groove. After the leveling ball 12 is pushed in, the leveling ball 12 pulls the pull rope 7, so that the pull rope 7 pulls the abutment block 4, thereby causing the protrusion 401 on the abutment block 4 to separate from the supporting leg 2. At this time, the supporting leg 2 can slide quickly without being affected by the air pressure. At this time, the supporting leg 2 falls under the influence of gravity until the leveling leg 3 is completely retracted. At this time, the product can be stored, and the operation is simple and convenient.

[0027] A rubber shrinkage is provided at the opening of the accommodating groove, and the elastic force of the rubber shrinkage is greater than or equal to the gravity of the leveling ball 12. The rubber shrinkage can prevent the leveling ball 12 from falling suddenly when the supporting leg 2 is opened and the pushing block 9 is separated from the leveling ball 12. The worker only needs to pull the leveling ball 12 out. Similarly, when storing, it also avoids the inconvenience of having to support the leveling ball 12 with hands when rotating the supporting leg 2.

[0028] A locking device is threadedly connected to the leveler, one end of which can be moved to abut against the abutment block 4, and the other end passes through the leveler to form a rotating piece 8. The locking device can be better rotated through the rotating piece 8. Since the locking device is threadedly connected to the leveler, when the rotating piece 8 rotates, it will cause the locking device to move closer to or away from the abutment block 4, thereby forming a locking or loosening effect.

[0029] A chuck groove is provided on the load-bearing plate 1, and a centering chuck 11 is slidably arranged in the chuck groove. The jack is fixed by using the centering chuck 11 to prevent the jack from tilting during the jacking operation and ensure the safety of the jacking operation.

[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0031] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic leveling lifting bracket, comprising a load-bearing plate and three supporting legs rotatably connected to the load-bearing plate, characterized in that: A leveling leg is slidably provided in the support leg, an abutment tooth is provided on the leveling leg, an abutment block for abutting the abutment tooth is slidably provided on the support leg, a spring is sleeved in the middle of the abutment block, and a leveling ball is fixed to one end of the abutment block on the three different support legs away from the leveling leg through a pull rope, and a leveling device for clamping the pull rope is provided on the support leg, and when the gravity exerted on the leveling ball and the gravity exerted on the load-bearing plate are on the same vertical line, the external force exerted on the abutment block causes it to maintain a relatively static state, and the leveling device includes a liquid storage cylinder, a sliding cylinder connected to the liquid storage cylinder, and a floating lock sliding in the sliding cylinder Block, the floating locking block can abut against the pull rope, the supporting leg is provided with an air vent hole, the air vent hole is equipped with a slow-release valve for limiting the air flow rate, the surface of the leveling leg is sleeved with a sealing gasket for closing the internal space of the supporting leg, the abutment block is provided with a protrusion for sealing the internal space of the supporting leg, the distance between the protrusion and the supporting leg for sliding in contact is less than the maximum stroke of the abutment block, a receiving groove for accommodating a leveling ball is formed in the middle of the load-bearing plate, the supporting leg is provided with a push block for pushing the leveling ball into the receiving groove, and the push block can extend into the receiving groove when the supporting leg is in the storage state.

2. The self-leveling lifting bracket according to claim 1, characterized in that: A rubber shrinkage opening is arranged at the opening of the accommodating groove, and the elastic force of the rubber shrinkage opening is greater than or equal to the gravity of the leveling ball.

3. The self-leveling lifting bracket according to claim 2, characterized in that: A locking device is threadedly connected to the leveler. One end of the locking device can be moved to abut against the abutment block, and the other end passes through the leveler to form a rotating piece.

4. The self-leveling lifting bracket according to claim 1, characterized in that: The load-bearing plate is detachably connected to a hanging plate, and the hanging plate can be connected to the load-bearing plate through a chain.

5. The self-leveling lifting bracket according to claim 1, characterized in that: The load-bearing plate is provided with a chuck groove, in which a centering claw is slidably arranged.

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