Novel chassis leveling device and leveling method thereof

Abstract

The invention relates to a novel chassis leveling device and a leveling method thereof.The novel chassis leveling device comprises a connecting base, a screw, a nut, a base and a hydraulic oil cylinder, the connecting base is connected with a bottom plate at the bottom of a connecting half beam through a high-strength bolt, and the base makes contact with the ground; the connecting base and the base are connected through the screw, the top of the screw is connected with the base, the nut penetrates through the screw to make contact with the connecting base, the bottom end of the screw penetrates into a center reserved hole of the connecting base, and the hydraulic oil cylinder is arranged between a bottom plate at the bottom of the connecting half beam and the ground. When the bottom frame is leveled, the height of the bottom frame is adjusted by adjusting the hydraulic oil cylinder, and the connecting half beam is supported; when the underframe is adjusted to a nearly horizontal height, the height is adjusted through the nut; finally, the nut is screwed to be attached to the lower end face of the nut plate along the screw rod, and the locking effect is achieved. Operators control the hydraulic valve rods to complete stretching and retracting of the supporting legs, leveling of the bottom frame can be rapidly and conveniently completed, manpower is saved, and working efficiency is improved.

Description

Technical Field

[0001] The invention relates to a novel underframe leveling device and a leveling method thereof, belonging to the technical field of tower cranes. Background Art

[0002] The tower crane base frame is the main supporting structure of the crane, which can bear the weight and force of the crane body and operation, so that the tower crane can maintain a stable state. The quality and stability of the base frame directly affect the operating efficiency and safety of the crane. The cross-type base frame is a commonly used base frame structure for tower cranes. It is mainly composed of two cross beams, four diagonal braces and one tower base frame section. It bears various loads such as bending moment, torque, horizontal force and axial force transmitted from the upper tower body.

[0003] Due to the complex working conditions of tower cranes, the legs of the base frame are not allowed to sink during operation. At the same time, the horizontality and verticality of the plane under the base frame determine whether the entire tower crane will tilt. Therefore, the base frame needs to be adjusted in terms of horizontality and verticality before the construction of the tower crane. Usually, four leveling devices are connected to the base frame bottom plate by bolts. When working, the plane under the base frame, i.e., the bottom plates of the four leveling devices, are placed on a solid and flat concrete foundation or roadbed. The legs are manually leveled by rotating the nuts on the leveling devices with a wrench. When the ground is uneven, it is necessary to adjust repeatedly until the base frame is leveled, which is extremely inconvenient to operate and wastes a lot of manpower and time. Moreover, the load on the base frame is only carried by the locking of the nuts and screws. Once the device is not locked or becomes loose, there will be major safety hazards. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a new underframe leveling device and a leveling method thereof, which adopts a hydraulic cylinder and a screw nut structure. The height of the underframe is adjusted by adjusting the hydraulic device, and the load on the legs is carried by reliable locking of the nut and the screw to prevent the legs from sinking.

[0005] The present invention is achieved through the following technical solutions: a new type of chassis leveling device, including a connecting seat, a screw rod, a nut, a base and a hydraulic cylinder, the connecting seat is connected to the bottom plate of the bottom of the connecting half beam through high-strength bolts, and the base is in contact with the ground; the connecting seat and the base are connected through a screw rod, the top of the screw rod is connected to the base, the nut passes through the screw rod and contacts the connecting seat, the bottom end of the screw rod penetrates into the central reserved hole of the connecting seat, and the hydraulic cylinder is arranged between the bottom plate of the bottom of the connecting half beam and the ground.

[0006] The connecting seat comprises a connecting base plate and a nut plate, and the connecting base plate and the connecting half beam are fixed by high-strength bolts.

[0007] The nut is screwed along the screw rod until it fits with the lower end surface of the nut plate.

[0008] The base comprises a bottom plate, a rotating block and a rib plate. The bottom plate of the base contacts the ground, and the rotating block screw and the rib plate reinforce the base.

[0009] The cylinder barrel of the hydraulic oil cylinder is connected to the ground, and the telescopic part of the hydraulic oil cylinder is connected to the bottom of the connecting half beam.

[0010] The hydraulic oil cylinders are arranged on the four sides of the half-beam chassis, so that the four sides of the chassis are evenly subjected to hydraulic jacking.

[0011] A leveling method using a novel chassis leveling device comprises the following steps: When the chassis is leveled, first adjust the height of the chassis by adjusting the hydraulic cylinder to support the connecting half beam; When the base frame is adjusted to a height that is nearly horizontal, adjust the height using the nut; Finally, screw the nut along the screw until it fits against the lower end surface of the nut plate to achieve a locking effect.

[0012] The beneficial effects of the present invention are: the four sides of the base frame are evenly subjected to hydraulic jacking and force. After the improved design of the outrigger leveling device, the operator can operate the hydraulic valve stem to complete the extension and retraction of the outrigger, and the leveling of the base frame can be completed quickly and easily, saving manpower and improving work efficiency. The outrigger structure retains the screw nut, ensuring the reliable locking of the outrigger, meeting the use requirements of the crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a reference diagram of the use status of the present invention.

[0015] In the figure: 1. connecting seat; 2. screw rod; 3. nut; 4. base; 5. hydraulic cylinder; 6. connecting half beam. DETAILED DESCRIPTION

[0016] like Figure 1 and Figure 2 A novel chassis leveling device shown in the figure includes a connecting seat 1, a screw rod 2, a nut 3, a base 4 and a hydraulic cylinder 5. The connecting seat 1 is connected to the bottom plate at the bottom of the connecting half beam 6 by high-strength bolts, and the base 4 is in contact with the ground; the connecting seat 1 and the base 4 are connected by a screw rod 2, the top of the screw rod 2 is connected to the base 4, the nut 3 passes through the screw rod 2 and contacts the connecting seat 1, and the bottom end of the screw rod 2 penetrates into the central reserved hole of the connecting seat 1, and the hydraulic cylinder 5 is arranged between the bottom plate at the bottom of the connecting half beam 6 and the ground.

[0017] The connecting seat 1 comprises a connecting base plate and a nut plate, and the connecting base plate and the connecting half beam 6 are fixed by high-strength bolts.

[0018] The nut 3 is screwed along the screw rod 2 until it fits with the lower end surface of the nut plate.

[0019] The base 4 comprises a bottom plate, a rotating block and a rib plate. The bottom plate of the base 4 contacts the ground, and the rotating block screw 2 and the rib plate reinforce the base 4.

[0020] The cylinder barrel of the hydraulic cylinder 5 is connected to the ground, and the telescopic part of the hydraulic cylinder 5 is connected to the bottom of the connecting half beam 6.

[0021] The hydraulic cylinders 5 are arranged on the four sides of the chassis connected to the half beam 6, so that the four sides of the chassis are evenly subjected to hydraulic jacking.

[0022] A leveling method using a novel chassis leveling device comprises the following steps: When the chassis is leveled, the height of the chassis is first adjusted by adjusting the hydraulic cylinder 5 to support the connecting half beam 6; When the base frame is adjusted to a nearly horizontal height, the height is adjusted by nut 3; Finally, the nut 3 is screwed along the screw rod 2 until it fits against the lower end surface of the nut plate to achieve a locking effect.

[0023] The base frame is one of the important structural parts of a tower crane. It is located at the bottom of the tower and is mainly used to support the overall structure of the tower crane.

[0024] The horizontality of the base frame refers to the degree of deviation between the horizontal plane connecting the base frame and the tower crane superstructure and the reference horizontal plane.

[0025] The verticality of the base frame refers to the degree of vertical deviation between the vertical plane connecting the base frame and the tower crane superstructure and the reference horizontal plane.

[0026] During the leveling process, when the hydraulic cylinder 5 is adjusted to a height that is nearly horizontal, the nut 3 is turned to adjust the horizontality and verticality of the connecting half-beam 6. A lot of effort can be saved when fixing the adjustment nut 3. The nut is screwed along the screw until it fits with the lower end surface of the nut plate, which plays a locking role. This device has a double insurance effect on the base frame. Once the hydraulic device fails due to cylinder leakage or hydraulic one-way valve pressure relief, and the outrigger sinks, the nut 3 and the screw 2 are reliably locked to bear the load on the outrigger and prevent the outrigger from sinking. This device allows the operator to adjust the height of the base frame by manipulating the hydraulic valve stem, and can quickly and easily complete the leveling of the base frame, saving manpower and improving work efficiency. It also retains the original leveling device and improves the safety of the tower crane.

Claims

1. A new chassis leveling device, characterized in that: The invention comprises a connecting seat (1), a screw rod (2), a nut (3), a base (4) and a hydraulic cylinder (5); the connecting seat (1) is connected to a bottom plate at the bottom of a connecting half beam (6) by means of high-strength bolts, and the base (4) is in contact with the ground; the connecting seat (1) and the base (4) are connected by means of a screw rod (2); the top of the screw rod (2) is connected to the base (4); the nut (3) passes through the screw rod (2) and contacts the connecting seat (1); the bottom end of the screw rod (2) passes through a central reserved hole of the connecting seat (1); and the hydraulic cylinder (5) is arranged between the bottom plate at the bottom of the connecting half beam (6) and the ground.

2. A novel chassis leveling device according to claim 1, characterized in that: The connecting seat (1) comprises a connecting base plate and a nut plate, and the connecting base plate and the connecting half beam (6) are fixed by high-strength bolts.

3. A novel chassis leveling device according to claim 1, characterized in that: The nut (3) is screwed along the screw rod (2) until it fits against the lower end surface of the nut plate.

4. A novel chassis leveling device according to claim 1, characterized in that: The base (4) comprises a bottom plate, a rotating block and a rib plate. The bottom plate of the base (4) contacts the ground, and the rotating block screw (2) and the rib plate reinforce the base (4).

5. A novel chassis leveling device according to claim 1, characterized in that: The cylinder barrel of the hydraulic oil cylinder (5) is connected to the ground, and the telescopic portion of the hydraulic oil cylinder (5) is connected to the bottom of the connecting half beam (6).

6. A novel chassis leveling device according to claim 1, characterized in that: The hydraulic cylinders (5) are arranged on the four sides of the chassis connected to the half beam (6), so that the four sides of the chassis are evenly subjected to hydraulic jacking.

7. A leveling method using the novel chassis leveling device according to any one of claims 1 to 6, characterized in that: Includes steps: When the chassis is leveled, the height of the chassis is first adjusted by adjusting the hydraulic cylinder (5) to support the connecting half beam (6); When the base frame is adjusted to a height that is nearly horizontal, the height is adjusted using the nut (3); Finally, the nut (3) is screwed along the screw rod (2) until it fits against the lower end surface of the nut plate to achieve locking effect.

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