A crane for low headroom lifting machinery

Abstract

A mechanical crane for low headroom, which relates to the technical field of mechanical cranes, comprises a crane main beam, a connecting beam symmetrically arranged at the bottom of the crane main beam, a support leg arranged at the bottom of the connecting beam, and a walking system arranged on the support leg, wherein the walking system walks on a preset track, and further comprises a traverse trolley arranged on the track at the top of the crane main beam and capable of lateral movement along the length direction of the crane main beam, and a hoisting device coordinated with the traverse trolley, wherein the traverse trolley and the hoisting device are both provided with a pulley block, winches are symmetrically arranged at the two lower sides of the crane main beam through a hanger, and steering pulley blocks are correspondingly arranged at the two upper sides of the crane main beam. The invention solves the problem of hoisting operations in confined spaces, has a simple and compact structure, and is highly practical.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical overhead cranes, in particular to a lifting mechanical overhead crane for low clearance. Background Art

[0002] A crane is a multi-action lifting machine that can lift and carry heavy objects vertically and horizontally within a certain range. It is also called a crane, overhead crane, or crane. The hoisting winch of a traditional lifting machine is generally installed on the top of the crane and is integrated with the crane. The direction of the winch's rope output is downward, and the force is downward. The overall height of the crane is relatively high. However, under the condition of limited space, the overall height of the equipment will be limited. Therefore, a lifting machine that can be applied to low headroom is needed to complete the construction content of various construction conditions. Utility Model Content

[0003] The utility model aims to provide a crane for a low-headroom hoisting machine to solve the problem of hoisting operations in a confined space.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A crane for a low headroom hoisting machine, comprising a crane main beam, a connecting beam symmetrically arranged at the bottom side of the crane main beam, a support leg arranged at the bottom side of the connecting beam, and a travel system arranged on the support leg, wherein the travel system travels on a preset track, and further comprises a traverse trolley arranged on the track at the top of the crane main beam and capable of lateral movement along the length direction of the crane main beam, and a sling coordinated with the traverse trolley, wherein pulley blocks are arranged on the traverse trolley and the sling, winches are symmetrically arranged at both lower sides of the crane main beam through a hanger, and steering pulley blocks are correspondingly arranged at both upper sides of the crane main beam;

[0006] After the wire rope of the winch is unloaded upward, it changes direction through the steering pulley block, and passes around the pulley blocks of the transverse trolley and the sling in turn, and finally adjusts its direction through another steering pulley block to cooperate with another winch.

[0007] Furthermore, the steering pulley group includes connecting ear plates symmetrically arranged on the main beam of the overhead crane, a fixed pin shaft rotatably connected between the connecting ear plates on both sides, and a steering pulley rotatably arranged on the fixed pin shaft. While being rotatable, the steering pulley can slide along the length direction of the fixed pin shaft, and the steering pulley is movably overlapped with the wire rope on the rope outlet side of the winch.

[0008] Furthermore, the upper ends of the two connecting ear plates are recessed downward to form connecting grooves, and the two ends of the fixing pin shaft can be rotatably overlapped on the connecting grooves respectively, and the fixing pin shaft is positioned in the connecting grooves by a limiting clamping plate.

[0009] Furthermore, the limit clamping plate is fixed to the connecting ear plate by bolts.

[0010] Furthermore, when lifting or lowering the suspended object, the two winches synchronously reel in or release the ropes.

[0011] Furthermore, the hanger is connected to the main beam of the overhead travelling crane through bolts to form a whole.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a crane for a low-headroom hoisting machine, which solves the problem of hoisting operations in a confined space, has a simple and compact structure and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is the overall schematic diagram of the utility model;

[0016] Figure 2 It is a side view of an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of a steering pulley in an embodiment of the utility model;

[0018] In the figure: 1- main beam of overhead crane, 2- connecting beam, 3- outrigger, 4- traveling system, 5- transverse trolley, 6- winch, 7- hanger, 8- steering pulley, 9- sling, 10- wire rope, 11- fixed pin shaft, 12- ear plate, 13- limit clamping plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations 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 therefore cannot be understood as a limitation on the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] like Figure 1-3 As shown, a crane for a low headroom hoisting machine includes a crane main beam 1, a connecting beam 2 symmetrically arranged at the bottom side of the crane main beam 1, a support leg 3 arranged at the bottom side of the connecting beam 2, and a walking system 4 arranged on the support leg 3, wherein the walking system walks on a preset track, and also includes a traverse trolley 5 arranged on the track at the top of the crane main beam 1 and capable of lateral movement along the length direction of the crane main beam 1, and a sling 9 coordinated with the traverse trolley 5, wherein pulley blocks are arranged on the traverse trolley 5 and the sling 9, winches 6 are symmetrically arranged at both lower sides of the crane main beam 1 through hangers 7, and steering pulley blocks are correspondingly arranged at both upper sides of the crane main beam 1;

[0024] After the wire rope 10 of the winch 6 is unwound upward, it changes direction through the steering pulley block, and passes around the pulley blocks of the transverse trolley 5 and the sling 9 in turn, and finally adjusts its direction through another steering pulley block to cooperate with another winch 6.

[0025] Specifically, as shown in the figure, the steering pulley block includes a connecting ear plate 12 symmetrically arranged on the main beam 1 of the overhead crane, a fixed pin shaft 11 rotatably connected between the connecting ear plates 12 on both sides, and a steering pulley 8 rotatably arranged on the fixed pin shaft 11. While being rotatable, the steering pulley 8 can slide along the length direction of the fixed pin shaft 11, and the steering pulley 8 is movably overlapped with the steel wire rope on the rope outlet side of the winch. The upper ends of the two connecting ear plates 12 are recessed downward to form connecting grooves, and the two ends of the fixed pin shaft 11 are rotatably overlapped on the connecting grooves respectively, and the fixed pin shaft 11 is positioned in the connecting groove by a limiting clamp plate 13. The limiting clamp plate 13 is fixed to the connecting ear plate 12 by bolts.

[0026] The presence of the steering pulley block changes the force direction of the winch, which is not only suitable for hoisting or dragging operations when the winch is set at different positions, but also simple to modify, easy to operate, and cost-saving. It also adds a rope-arranging function to effectively ensure safety during construction operations.

[0027] Specifically, as shown in the figure, when lifting and lowering the hanging object, the two winches 6 synchronously reel in or release the rope to ensure that the lengths of the wire ropes on the drums on both sides are basically the same and the force is evenly applied.

[0028] Specifically, as shown in the figure, during the transverse movement of the transverse trolley, the double winches are locked and the motor drives the transverse trolley to overcome the sliding friction between the pulley block and the wire rope to achieve transverse movement.

[0029] Specifically, as shown in the figure, the hanger 7 is connected to the main beam 1 of the overhead travelling crane by bolts to form an integral body.

[0030] Among them, the pulley block has multiple pulleys, and the specific number to be used can be calculated and selected based on the winch model, the weight of the hoisted object and the size of the wire rope.

[0031] Among them, the steering pulley slides along the fixed pin shaft and can be used as a rope arranger for the winch to ensure that the wire rope is wound on the drum in an orderly manner and ensure construction safety.

[0032] The utility model provides a crane for a low-headroom hoisting machine, which solves the problem of hoisting operations in a confined space, has a simple and compact structure and is highly practical.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0034] 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. A crane for a low headroom crane, characterized in that: The invention comprises a crane main beam (1), a connecting beam (2) symmetrically arranged at the bottom side of the crane main beam (1), a support leg (3) arranged at the bottom side of the connecting beam (2), and a walking system (4) arranged on the support leg (3), wherein the walking system walks on a preset track, and further comprises a traverse trolley (5) arranged on the track at the top of the crane main beam (1) and capable of transverse movement along the length direction of the crane main beam (1), and a sling (9) cooperating with the traverse trolley (5), wherein pulley blocks are arranged on the traverse trolley (5) and the sling (9), winches (6) are symmetrically arranged at both lower sides of the crane main beam (1) through a sling (7), and steering pulley blocks are correspondingly arranged at both upper sides of the crane main beam (1); After the wire rope (10) of the winch (6) is unwound upward, it changes direction through a steering pulley block, and passes through the pulley blocks of the transverse trolley (5) and the sling (9) in sequence, and finally adjusts its direction through another steering pulley block to cooperate with another winch (6).

2. A crane for a low headroom crane according to claim 1, characterized in that: The steering pulley block comprises a connecting ear plate (12) symmetrically arranged on the main beam (1) of the overhead travelling crane, a fixed pin shaft (11) rotatably connected between the connecting ear plates (12) on both sides, and a steering pulley (8) rotatably arranged on the fixed pin shaft (11); while being rotatable, the steering pulley (8) can slide along the length direction of the fixed pin shaft (11); and the steering pulley (8) is movably overlapped with a steel wire rope on the rope outlet side of a winch.

3. A crane for a low headroom crane according to claim 2, characterized in that: The upper ends of the two connecting ear plates (12) are recessed downwards to form connecting grooves, and the two ends of the fixing pin shaft (11) are rotatably overlapped on the connecting grooves respectively, and the fixing pin shaft (11) is positioned in the connecting grooves by a limiting clamping plate (13).

4. A crane for a low headroom crane according to claim 3, characterized in that: The limiting clamping plate (13) is fixed to the connecting ear plate (12) by means of bolts.

5. A crane for a low headroom crane according to claim 4, characterized in that: When lifting or lowering the suspended object, the two hoists (6) synchronously reel in or release the ropes.

6. A crane for a low headroom crane according to claim 5, characterized in that: The hanger (7) is connected to the overhead travelling crane main beam (1) via bolts to form a whole.

Images