Rear base applied to single-mast crane

Abstract

The utility model discloses a rear base applied to a single-mast crane, which comprises a left counterweight tray and a right counterweight tray which are used for bearing, and a connecting beam is arranged between the left counterweight tray and the right counterweight tray; thrust wheels used for rotation are arranged on the side faces of the left balance weight tray and the right balance weight tray, and steering shafts of the thrust wheels are perpendicular to the connecting beam. The top end of the jack is connected with the respective jacking interfaces of the left and right counterweight trays, and the bottom end of the jack is connected with the supporting legs. According to the utility model, the detachable thrust wheel is arranged and is matched with the jack and the supporting legs, so that the crane can rotate under the traction of external force; secondly, the rotation center of the thrust wheel is consistent with the rotation center of the crane, so that torque is prevented from being applied to the rotation center of the crane; the whole rear base is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, in particular to a rear base used for a single-mast crane. Background Art

[0002] At present, mast cranes are one of the more common cranes, and are often used in ports and construction sites. They are usually fixedly installed, that is, the lifting of objects is achieved by pitching the main arm and raising and lowering the hook. In the application scenario of the port, ships are usually loaded and unloaded, and the main arm is extended from the dock. In the process of assembling and disassembling the crane, since the main arm extends into the water, a floating crane is required to assist the operation, which incurs certain equipment costs and poses safety hazards.

[0003] In the prior art, there is a Chinese patent with application number "2021109696348" and the name "A Mast Crane". In this patent, a large number of counterweights are arranged at the hinge point of the rear support rod, which can realize load-carrying rotation and expand the operating range of the mast crane. The rear chassis in this patent realizes the movement of the rotary mast crane, which can avoid disassembly and assembly operations on water, but its structure is complex and the cost of use is high. Utility Model Content

[0004] Purpose of the utility model: The purpose of the utility model is to provide a rear base for a single-mast crane which has a simple structure and is easy to use.

[0005] Technical solution: The rear base applied to a single-mast crane described in the utility model includes a left counterweight tray and a right counterweight tray for bearing weight, and a connecting beam is provided between the left and right counterweight trays; the left counterweight tray and the right counterweight tray are provided with supporting wheels for rotation on the sides, and the steering shafts of the supporting wheels are perpendicular to the connecting beam; it also includes a jack, the top end of which is connected to the respective lifting interfaces of the left and right counterweight trays, and the bottom end of which is connected to the supporting feet.

[0006] Among them, the left counterweight tray body is a box beam structure, including a middle box beam and side box beams arranged on both sides. The two ends of the middle box beam are connected to the side box beams through rib plates, and wing plates are arranged on the rib plates.

[0007] Wherein, the middle box girder is provided with a traction interface, a connecting beam interface and a jacking interface.

[0008] Wherein, the side box beam is provided with a track wheel interface.

[0009] Wherein, the connecting beam comprises a main body, counterweight tray interfaces are arranged at both ends of the main body, a crane longitudinal beam interface for connecting the crane is arranged on the plane of the main body, and the crane longitudinal beam interface is arranged horizontally.

[0010] The center of rotation of the supporting wheel coincides with the rotation center of the crane.

[0011] Wherein, the side counterweight tray is provided with positioning pins for positioning the counterweight container.

[0012] Beneficial effects: Compared with the prior art, the utility model has the following advantages: the utility model realizes the rotation of the crane under the traction of external force by setting a detachable supporting wheel, cooperating with a jack and a support foot; secondly, the rotation center of the supporting wheel is consistent with the rotation center of the crane, avoiding the application of torque on the rotation center of the crane; the entire rear base has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall schematic diagram of the rear base of the utility model;

[0014] Figure 2 It is a schematic diagram of the rear base of the utility model when in use;

[0015] Figure 3 This is a schematic diagram of the structure of the counterweight tray of the utility model;

[0016] Figure 4 This is a schematic diagram of the rotation of the rear base of the utility model;

[0017] Figure 5 It is a structural schematic diagram of the connecting beam of the utility model. DETAILED DESCRIPTION

[0018] like Figures 1-2 As shown, the rear base used for the single mast crane in the utility model includes a left counterweight tray 1, a supporting wheel 2, a jack 3, a support foot 4, a connecting beam 5, a right counterweight tray 6 and a container counterweight 7. The left counterweight tray 1, the right counterweight tray 2 and the connecting beam 5 form a whole, namely the rear base.

[0019] The structure of the counterweight tray is as follows Figure 3 As shown, the main body of the counterweight pallet is a box beam structure, including a middle box beam 18 and a side box beam 17; the middle box beam 18 includes a traction interface 12, a connecting beam interface 13, a jacking interface 14, and the side box beam 17 is provided with 11 supporting wheel interfaces. The box beams are welded into a whole through ribs 19, and the wing plates 110 are welded above and below the ribs. The box beams and wing plates 110 are leveled above and below. A positioning bracket 15 is arranged flat on the pallet for positioning the counterweight container. The connecting beam and supporting wheel interfaces are all connected by pins 16, and two pins are arranged side by side. The axis of the supporting wheel interface all points to the center of rotation, as shown in FIG. Figure 4 shown.

[0020] like Figure 5As shown, the main body 53 of the connecting beam 5 is a box beam structure, with counterweight tray interfaces 51 at both ends and a crane longitudinal beam interface 52 at the top. The crane longitudinal beam interface 52 is arranged horizontally so as to rotate around the axis when the rear base is lifted as a whole.

[0021] Workflow: During assembly, first connect the counterweight tray to the connecting beam 5. After it is connected to the rest of the crane structure, use the jack 3 and the support leg 4 to lift the rear base to the predetermined height, install the supporting roller 2, remove the jack 4 and the support leg 5, and the rear base can rotate under the traction of external force. Rotate to the working position, continue to use the jack 4 and the support leg 5 to lift the rear base to the predetermined height, remove the supporting roller 2, and remove the jack 4 and the support leg 5; during operation, the rear base's deadweight and the container counterweight are used to balance the tipping moment of the main arm and the hanging weight. Since the rear base only performs rotational movement, the axis of the supporting roller interface is designed to point to the rotation center, which is convenient for rotation after the supporting roller is installed; the positioning bracket is arranged according to the counterweight container interface; before lifting the rear base, the pitch angle of the main arm is adjusted to obtain the predetermined support reaction force at the rear base, effectively reducing the force on the jack and the supporting roller, so as to select a smaller supporting roller structure.

Claims

1. A rear base for a single mast crane, characterized in that: The invention comprises a left counterweight tray (1) and a right counterweight tray (6) for bearing weight, wherein a connecting beam (5) is arranged between the left and right counterweight trays; the left counterweight tray (1) and the right counterweight tray (6) are provided with supporting rollers (2) for rotation on the sides, wherein the steering shafts of the supporting rollers (2) are perpendicular to the connecting beam (5); and a jack (3) is also included, wherein the top end of the jack is connected to the respective lifting interfaces (14) of the left and right counterweight trays, and the bottom end of the jack is connected to the supporting feet (4).

2. The rear base used for a single mast crane according to claim 1, characterized in that: The main body of the left counterweight tray (1) is a box beam structure, comprising a middle box beam (18) and side box beams (17) arranged on both sides, the two ends of the middle box beam (18) are connected to the side box beams (17) through ribs (19), and wing plates (110) are arranged on the ribs (19).

3. The rear base used for a single mast crane according to claim 2, characterized in that: The middle box beam (18) is provided with a traction interface (12), a connecting beam interface (13) and a jacking interface (14).

4. The rear base for a single mast crane according to claim 2, characterized in that: The side box beam (17) is provided with a track wheel interface (11).

5. The rear base for a single mast crane according to claim 1, characterized in that: The connecting beam (5) comprises a body (53), counterweight tray interfaces (51) are arranged at both ends of the body (53), a crane longitudinal beam interface (52) for connecting with a crane is arranged on the plane of the body (53), and the crane longitudinal beam interface (52) is arranged horizontally.

6. The rear base used for a single mast crane according to claim 1, characterized in that: The center of rotation of the supporting wheel (2) coincides with the rotation center of the crane.

7. The rear base for a single mast crane according to claim 1, characterized in that: The side counterweight tray is provided with a positioning pin (15) for positioning the counterweight container.

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