Lifting support with automatic leveling function

Abstract

The invention discloses an automatic leveling lifting support, and belongs to the field of lifting equipment. When the lifting support is inclined during placement, the weight of a leveling ball is utilized to pull an abutting block to enable the abutting block to be separated from abutting teeth of a leveling leg, at the moment, a supporting leg slides along the leveling leg under the influence of gravity, a supporting disc rotates, and the supporting disc gradually rotates to a horizontal state, so that the supporting leg can be automatically leveled; the leveling ball is slowly centered under the influence of gravity, component force borne by the pull rope begins to be reduced, the spring is promoted to push the abutting block to move, when the abutting block makes contact with the leveling leg, abutting teeth on the leveling leg abut against the abutting block, part of force of the spring is promoted to be shared by the abutting teeth, the spring is compressed again, and then the leveling leg is pressed. At the moment, when the leveling device on the supporting leg reaches the horizontal position, the leveling device clamps the pull rope, so that the pull rope does not pull the abutting block, meanwhile, the component force of the abutting teeth received by the spring is also in the balanced state, the bearing disc is just in the horizontal state, and the effect that automatic leveling can be achieved after the support is placed by a worker is achieved.

Description

Technical Field

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

[0002] A lifting bracket is a frame used on construction sites for lifting heavy objects or as the bottom support of a jack.

[0003] The existing lifting bracket needs to be leveled manually when in use. If it is not leveled, it is easy to fall over due to uneven force or break due to concentrated force when lifting heavy objects. When the lifting bracket itself is lifting heavy objects, the heavy objects and the bracket may fall over or break, which may damage the objects at the least and cause safety accidents at the worst.

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

[0005] The purpose of the present invention is to provide a self-leveling lifting bracket in order to solve the above-mentioned problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: an automatic leveling lifting bracket, comprising a load-bearing plate and three supporting legs rotatably connected to the load-bearing plate, a leveling leg is slidably arranged in the supporting leg, abutting teeth are arranged on the leveling leg, abutting blocks for abutting the abutting teeth are slidably arranged on the supporting leg, a spring is sleeved on the middle part of the abutting block, and a leveling ball is fixed to the end of the abutting blocks on the three different supporting legs away from the leveling leg through a pull rope, a leveling device for clamping the pull rope is arranged on the supporting leg, 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 abutting block causes it to maintain a relatively static state, and the leveling device comprises a liquid storage cylinder, a sliding cylinder connected to the liquid storage cylinder and a floating locking block sliding in the sliding cylinder, and the floating locking block can abut against the pull rope.

[0007] Preferably, an air leakage hole is opened on the supporting leg, and a slow-release valve for limiting the air flow rate is installed on the air leakage hole. The surface of the leveling leg is provided with a sealing pad for sealing the internal space of the supporting leg.

[0008] Preferably, the abutment block is provided with a protrusion for sealing the inner space of the supporting leg, and the distance for the protrusion to slide in contact with the supporting leg is less than the maximum stroke of the abutment block.

[0009] Preferably, a receiving groove for receiving the leveling ball is formed in the middle of the load-bearing plate, and a push block for pushing the leveling ball into the receiving groove is provided on the supporting leg, and the push block can extend into the receiving groove when the supporting leg is in the storage state.

[0010] Preferably, a rubber shrinkage opening is provided 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.

[0011] Preferably, 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.

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

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

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: when the support is tilted during placement, the weight of the leveling ball is used to pull the abutment block, causing the abutment block to separate from the abutment teeth of the leveling leg. At this time, the supporting leg slides along the leveling leg under the influence of gravity, causing the supporting plate to rotate. As the supporting plate gradually rotates to a horizontal state, the leveling ball is slowly centered under the influence of gravity, causing the component force received by the pull rope to begin to decrease, causing the spring to push the abutment block to move. When the abutment block contacts the leveling leg, the abutment teeth on the leveling leg abut against the abutment block, causing part of the force of the spring to be shared by the abutment teeth, and the spring is compressed again. At this time, when the leveler on the supporting leg reaches a horizontal position, the leveler clamps the pull rope, so that the pull rope no longer pulls the abutment block, and at the same time, the spring is also in a balanced state with the component force received by the abutment teeth. At this time, the load-bearing plate will be just in a horizontal state, achieving the effect of automatic leveling after the worker places the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the cross-sectional structure of the supporting leg; Figure 2 is a schematic diagram of the structure of the supporting legs; Figure 3 It is a structural schematic diagram of the present invention; Figure 4 It is a structural schematic diagram of the present invention in a hoisting state; Figure 5 for Figure 1 A partial enlarged view of .

[0016] Figure numerals: 1. load-bearing plate; 2. supporting leg; 201. slow-release valve; 3. leveling leg; 4. abutment block; 401. protrusion; 5. floating locking block; 6. liquid storage cylinder; 7. pull rope; 8. rotating plate; 9. push block; 10. lifting plate; 11. centering claw; 12. leveling ball. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which 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 therefore cannot be understood as a limitation on the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, an automatic leveling lifting bracket includes a load-bearing plate 1 and three supporting legs 2 rotatably connected to the load-bearing plate 1, a leveling leg 3 is slidably arranged inside the supporting leg 2, abutting teeth are arranged on the leveling leg 3, abutting blocks 4 for abutting the abutting teeth are slidably arranged on the supporting leg 2, a spring is sleeved on the middle part of the abutting block 4, a leveling ball 12 is fixed to the end of the abutting block 4 on the three different supporting legs 2 away from the leveling leg 3 through a pull rope 7, a leveler for clamping the pull rope 7 is arranged on the supporting leg 2, when the gravity exerted on the leveling ball 12 and the gravity exerted on the load-bearing plate 1 are on the same vertical line, the external force exerted on the abutting block 4 causes it to maintain a relatively static state, the leveling device includes a liquid storage cylinder 6, a sliding cylinder connected to the liquid storage cylinder 6 and a floating locking block 5 sliding in the sliding cylinder, and the floating locking block 5 can abut against the pull rope 7.

[0019] When using this product, you need to first pull out the leveling legs 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 required specified length, and then place them at the required hoisting object or support. Since it is impossible to determine whether the ground is flat, after the bracket is placed, the two longer support legs 2 with the overall length of the support legs 2 and the leveling legs 3 will cause the load-bearing plate 1 to tilt, and at the same time cause gravity to approach the shorter support leg 2, so that the pull rope 7 on the shorter support leg 2 pulls the leveling ball 1 2 is reduced, causing the tension on the draw rope 7 on the two longer support legs 2 to increase, thereby pulling out the abutment block 4, causing the abutment block 4 to separate from the abutment teeth. After the abutment teeth are separated, the support legs 2 will slide along the leveling legs 3 under the influence of gravity. As the height of the support legs 2 decreases, when the corresponding 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 gravity, causing the liquid in the sliding cylinder to increase, thereby achieving a rise in the liquid level. As the liquid level rises, the floating locking block 5 is pushed to slide by the liquid. Until the levelers on the three supporting legs 2 are in the same straight line position, the locking block clamps the pull rope 7, so that the gravity of the leveling ball 12 is offset by the clamping force of the locking block. When the corresponding leveling device connection surfaces on the three supporting legs 2 slowly approach the horizontal plane, the gravity direction of the leveling ball 12 continuously approaches the gravity direction of the load-bearing plate 1. At this time, due to the movement of the leveling ball 12, the tensions on the three pull ropes 7 connected to the abutment blocks 4 of different supporting legs 2 tend to be equal. When the component force is equal to the elastic force of the spring and the abutment force of the leveling leg 3 on the abutment block 4, the pull rope 7 is pulled to the same position. When the sum of the relay forces is reached, the supporting leg 2 is supported by the abutment block 4 and the abutment tooth. At this time, the load-bearing plate 1 is in a horizontal position, completing the self-leveling effect of the product. If hoisting operations are required after the product is leveled, the hoisting plate 10 can be installed, and then the hoisting operations can be performed by hanging a lifting hoist on the hoisting plate 10. When jacking operations are required, the jack only needs to be placed and fixed on the load-bearing plate 1 to proceed. Since the force of the product is centered after automatic leveling, there will be no tipping caused by eccentric force.

[0020] An air vent is provided on the supporting leg 2, and a slow-release valve 201 for limiting the air flow rate is installed on the air vent. A sealing gasket for sealing the internal space of the supporting leg 2 is sleeved on the surface of the leveling leg 3. The sealing gasket can separate the internal air from the outside, and the slow-release valve 201 can allow the air to be discharged slowly, thereby avoiding the abutment block 4 from reacting in time due to falling too quickly during leveling.

[0021] 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.

[0022] 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 be extended 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 drawstring 7, so that the drawstring 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 separated, 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.

[0023] 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.

[0024] A locking device is threadedly connected to the leveler, one end of the locking device 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 rotating piece 8 enables the locking device to be rotated better. 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.

[0025] The load-bearing plate 1 is provided with a chuck groove, in which a centering claw 11 is slidably provided. The centering claw 11 is used to fix the jack to avoid the jack from tilting during the jacking operation, thereby ensuring the safety of the jacking operation.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes 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 supporting leg, and an abutting tooth is provided on the leveling leg. An abutting block for abutting the abutting tooth is slidably provided on the supporting leg, and a spring is sleeved on the middle part of the abutting block. A leveling ball is fixed to one end of the abutting block on the three different supporting legs away from the leveling leg through a pull rope. A leveling device for clamping the pull rope is provided on the supporting leg. 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 abutting block causes it to maintain a relatively static state. The leveling device includes a liquid storage cylinder, a sliding cylinder connected to the liquid storage cylinder, and a floating locking block sliding in the sliding cylinder, and the floating locking block can abut against the pull rope.

2. The self-leveling lifting bracket according to claim 1, characterized in that: The support leg is provided with an air leakage hole, and a slow-release valve for limiting the air flow rate is installed on the air leakage hole. The surface of the leveling leg is sleeved with a sealing pad for sealing the internal space of the support leg.

3. The self-leveling lifting bracket according to claim 2, characterized in that: The abutment block is provided with a protrusion for sealing the inner space of the support leg, and the distance for the protrusion to slide in contact with the support leg is less than the maximum stroke of the abutment block.

4. The self-leveling lifting bracket according to claim 1, characterized in that: A receiving groove for receiving the leveling ball is formed in the middle of the load-bearing plate, and a push block for pushing the leveling ball into the receiving groove is arranged on the supporting leg, and the push block can extend into the receiving groove when the supporting leg is in the storage state.

5. The self-leveling lifting bracket according to claim 4, 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.

6. The self-leveling lifting bracket according to claim 5, 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.

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

8. 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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