Rotatable semi-portal grab crane

Abstract

The utility model discloses a rotatable semi-portal grab crane which comprises an annular track, a grab trolley and a trolley frame, the grab bucket trolley walks on the trolley frame and drives the grab bucket to act; one end of the trolley frame is connected with the slewing bearing through a bridge supporting leg, the other end of the trolley frame is provided with a walking mechanism, the walking mechanism drives the trolley frame to walk along the annular track, and the axis of the annular track coincides with the axis of the slewing bearing. One end of the trolley frame is connected with the rotary support through the bridge supporting leg, the other end of the trolley frame is driven by the walking mechanism to walk on the annular track, annular running of the grab bucket trolley is achieved, the grab bucket trolley can walk on the trolley frame, and therefore the grab bucket has a larger operation area, the use efficiency of a crane is improved, and the cost is reduced. And the trolley frame occupies a smaller workshop space, so that the workshop construction cost is reduced, and the trolley frame is suitable for old workshops.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a rotatable semi-gantry grab bucket crane. Background Art

[0002] At present, the commonly used grab bridge cranes in China are all linear running structures. The steel structure of the grab crane is more solid than that of the general crane. In addition, the grab size is usually larger, so the limit size, crane utilization range, space size and other issues have become key factors for users to consider. While requiring crane performance, users are also reducing the cost of plant construction. The framework of special structure plants and old plants greatly limits the space for crane design, so a rotatable semi-gantry grab crane is proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a rotatable semi-gantry grab crane to realize the circular operation of the grab trolley. The grab trolley can also walk on the trolley frame, so that the grab has a larger working area, and the efficiency of the crane is improved. In addition, the workshop space occupied by the trolley frame is smaller, and the cost of factory building construction is reduced. It is suitable for old factories and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotatable semi-gantry grab crane, comprising a circular track, a grab trolley and a trolley frame; the grab trolley runs on the trolley frame, and the grab trolley drives the grab to move; one end of the trolley frame is connected to a slewing support through a bridge support leg, and the other end of the trolley frame is provided with a walking mechanism, and the walking mechanism drives the trolley frame to move along the circular track, and the axis of the circular track coincides with the axis of the slewing support.

[0005] Preferably, the walking mechanism comprises a shell, in which wheels adapted to the circular track rotate, and a three-in-one reduction motor for driving the wheels to rotate is provided on one side of the shell.

[0006] Preferably, the outer side of the shell is also rotatably connected to two horizontal wheels adapted to the annular track, and the two horizontal wheels are located on both sides of the annular track.

[0007] Preferably, the trolley frame comprises two parallel-arranged off-track box-type main beams, the two off-track box-type main beams are connected by two connecting beams, and the off-track box-type main beams and the connecting beams are connected by a bolt and nut group.

[0008] Preferably, an escalator and a driver's cab are also provided on one side of the trolley frame.

[0009] Preferably, two traveling mechanisms are provided, and the two traveling mechanisms are arranged on both sides of the end of the trolley frame.

[0010] Compared with the prior art, the beneficial effects of the utility model are: one end of the trolley frame is connected to the slewing support through the bridge frame leg, and the other end of the trolley frame is driven to walk on the circular track through the walking mechanism, thereby realizing the circular operation of the grab trolley, and the grab trolley can also walk on the trolley frame, so that the grab has a larger working area, improves the efficiency of crane use, and the workshop space occupied by the trolley frame is smaller, reducing the cost of factory construction, and is suitable for old factories. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a top view of the utility model;

[0012] Figure 2 It is a side view of the utility model;

[0013] Figure 3 It is a schematic diagram of the structure of the walking mechanism of the utility model.

[0014] In the figure: 1 walking mechanism, 1.1 horizontal wheel, 1.2 wheel, 1.3 shell, 1.4 three-in-one reduction motor, 2 circular track, 3 slewing bearing, 4 grab trolley, 5 trolley frame, 6 bridge frame legs, 7 escalator, 8 grab, 9 driver's cab. DETAILED DESCRIPTION

[0015] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0016] See also Figure 1-3 The utility model provides a technical solution: a rotatable semi-gantry grab crane, comprising a circular track 2, a grab trolley 4 and a trolley frame 5; the grab trolley 4 travels on the trolley frame 5, and the grab trolley 4 drives the grab 8 to move; one end of the trolley frame 5 is connected to the slewing support 3 through the bridge support leg 6, and the other end of the trolley frame 5 is provided with a walking mechanism 1, and the walking mechanism 1 drives the trolley frame 5 to travel along the circular track 2, and the axis of the circular track 2 coincides with the axis of the slewing support 3;

[0017] It can be understood that one end of the trolley frame 5 is connected to the slewing support 3 through the bridge leg 6, and the other end of the trolley frame 5 is driven by the walking mechanism 1 to walk on the circular track 2, that is, the trolley frame 5 can rotate along the slewing support 3, and the grab trolley 4 walks on the trolley frame 5 to realize the circular operation of the grab trolley 4, so that the grab 8 has a larger operating area and improves the efficiency of the crane. Different from the linear operation structure of the traditional grab bridge crane, the workshop space occupied by the trolley frame 5 is smaller, which reduces the cost of factory building construction and is suitable for old factories. The turning radius R of the trolley frame 5 can be determined according to customer needs, and the circular track 2 is pre-installed in the factory workshop;

[0018] Specifically, the walking mechanism 1 includes a housing 1.3, in which a wheel 1.2 adapted to the circular track 2 rotates, and a three-in-one reduction motor 1.4 for driving the wheel 1.2 to rotate is provided on one side of the housing 1.3. The three-in-one reduction motor 1.4 has a motor, a reducer and a brake, and drives the wheel 1.2 to move along the circular track 2, thereby driving the trolley frame 5 to rotate;

[0019] Furthermore, the outer side of the housing 1.3 is also rotatably connected to two horizontal wheels 1.1 adapted to the circular track 2. The two horizontal wheels 1.1 are located on both sides of the circular track 2. The two horizontal wheels 1.1 are used to prevent the track from being derailed and the operation is more stable and smooth.

[0020] Further, the trolley frame 5 includes two parallel-arranged off-track box-type main beams, the off-track box-type main beams are lighter in weight, the two off-track box-type main beams are connected by two connecting beams, and the off-track box-type main beams and the connecting beams are connected by bolt and nut groups, and a live connection is adopted, which is conducive to transportation and installation;

[0021] In addition, an escalator 7 and a driver's cab 9 are provided on one side of the trolley frame 5; two walking mechanisms 1 are provided, and the two walking mechanisms 1 are arranged on both sides of the end of the trolley frame 5, and the two walking mechanisms 1 are provided to support and drive the trolley frame 5 to walk.

[0022] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended to include all changes that fall within the meaning and scope of equivalent elements in the content of the present invention.

Claims

1. A rotatable semi-gantry grab crane, characterized in that: The invention comprises an annular track (2), a grab trolley (4) and a trolley frame (5); the grab trolley (4) travels on the trolley frame (5), and the grab trolley (4) drives the grab (8) to move; one end of the trolley frame (5) is connected to a slewing bearing (3) via a bridge support leg (6), and the other end of the trolley frame (5) is provided with a walking mechanism (1), and the walking mechanism (1) drives the trolley frame (5) to travel along the annular track (2), and the axis of the annular track (2) coincides with the axis of the slewing bearing (3).

2. The rotatable semi-gantry grab crane according to claim 1, characterized in that: The walking mechanism (1) comprises a housing (1.3), a wheel (1.2) adapted to the annular track (2) is rotated inside the housing (1.3), and a three-in-one reduction motor (1.4) for driving the wheel (1.2) to rotate is provided on one side of the housing (1.3).

3. The rotatable semi-gantry grab crane according to claim 2, characterized in that: The outer side of the shell (1.3) is also rotatably connected to two horizontal wheels (1.1) adapted to the annular track (2), and the two horizontal wheels (1.1) are located on both sides of the annular track (2).

4. The rotatable semi-gantry grab crane according to claim 1, characterized in that: The trolley frame (5) comprises two parallel-arranged off-track box-type main beams, the two off-track box-type main beams are connected via two connecting beams, and the off-track box-type main beams and the connecting beams are connected via a bolt and nut set.

5. The rotatable semi-gantry grab crane according to claim 1, characterized in that: An escalator (7) and a driver's cab (9) are also provided on one side of the trolley frame (5).

6. The rotatable semi-gantry grab crane according to claim 1, characterized in that: The two traveling mechanisms (1) are provided, and the two traveling mechanisms (1) are arranged on both sides of the end of the trolley frame (5).

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