Crane

Abstract

The invention belongs to the technical field of cranes, and particularly relates to a crane. The invention comprises: a frame; the rotary table can rotate around the axis extending in the first direction relative to the frame and can move in the second direction relative to the frame, and the first direction is perpendicular to the second direction; one end of the cargo boom is fixed on the rotary table; the first driving piece is used for driving the rotary table to rotate around the axis extending in the first direction relative to the frame; the second driving part is used for driving the rotary table to move in the second direction relative to the frame. The whole loading device including the rotary table and the cargo boom can move front and back, so that the size of the whole loading device can be controlled within the shortest range, and the loading device is more flexible during running; meanwhile, the gravity center of the whole machine in the running state can be reasonably arranged, and the axle load balance state is optimized; under the condition that the layout of the chassis is fixed, the rotation center position can be moved to the centers of the front and rear supporting legs, and the operation stability of the whole machine is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cranes, in particular to a crane. BACKGROUND

[0002] As an important component of engineering machinery, the crane is mainly used for hoisting and installation operation in engineering construction and maintenance operation and hoisting and unloading operation of equipment and materials.

[0003] The advantage of the wheel crane is that it has convenient scene changing capability, and has good chassis running capability and upper installation operation capability. The overall machine size is short and compact, and the overall machine is more flexible when running. However, in order to have good operation capability, the upper installation needs to occupy a large space.

[0004] In recent years, as customers have higher and higher requirements for the operation performance of the crane, and due to the relevant requirements of road regulations on vehicles and the limitation of narrow operation scene space, it is difficult to arrange the overall center of gravity and space size. SUMMARY

[0005] In view of the above problems existing in the prior art, the present application provides a crane which can reduce the overall size while ensuring the operation capability and improve the compactness.

[0006] To achieve the above purpose, the technical scheme provided by the present application is as follows: The present application provides a crane, comprising: a vehicle frame; a rotating platform which is rotatable relative to the vehicle frame about an axis extending in a first direction, and is movable relative to the vehicle frame in a second direction; a hoisting arm, one end of which is fixed to the rotating platform; a first driving member for driving the rotating platform to rotate relative to the vehicle frame about the axis extending in the first direction; a second driving member for driving the rotating platform to move relative to the vehicle frame in the second direction.

[0007] Optionally, the first driving member comprises a slewing bearing and a driving mechanism for driving the inner ring of the slewing bearing to rotate, the slewing bearing is arranged on the second driving member and the inner ring of the slewing bearing is connected with the rotating platform.

[0008] Optionally, the second driving member comprises a variable position base and a power mechanism for driving the variable position base to move relative to the vehicle frame in the second direction; the variable position base is in sliding connection with the vehicle frame and is connected with the outer ring of the slewing bearing; a locking and supporting mechanism is arranged between the vehicle frame and the variable position base, and the locking and supporting mechanism is used for locking the variable position base on the vehicle frame and supporting the variable position base.

[0009] Optionally, the locking support mechanism comprises telescopic connectors arranged on the displacement base and a plurality of connector holes arranged on the side plates of the vehicle frame, the telescopic connectors being inserted into the connector holes when in an extended state; the plurality of connector holes are arranged along the second direction, and the telescopic connectors can be aligned with and inserted into different connector holes by sliding the displacement base along the vehicle frame.

[0010] Optionally, the locking support mechanism comprises telescopic connectors arranged on the displacement base and a plurality of connector holes arranged on the side plates of the vehicle frame, the telescopic connectors being inserted into the connector holes when in an extended state; the plurality of connector holes are arranged along the second direction, and the telescopic connectors can be aligned with and inserted into different connector holes by sliding the displacement base along the vehicle frame.

[0011] Optionally, the telescopic roller comprises a first telescopic cylinder and a roller, a fixed end of the first telescopic cylinder being connected to the displacement base, and a telescopic end of the first telescopic cylinder being connected to the roller.

[0012] Optionally, the displacement base comprises a mounting seat and two first plate bodies, two second plate bodies and two third plate bodies connected to the mounting seat, wherein the two third plate bodies are arranged at the innermost side, and the two first plate bodies are arranged at the outer side of the two second plate bodies. The slewing bearing is connected to the mounting seat. One end of the power mechanism is connected to the vehicle frame, and the other end of the power mechanism is hingedly connected to the two third plate bodies. A fixed end of the telescopic connector is connected to the first plate body, and a telescopic end of the telescopic connector faces the side plate of the vehicle frame.

[0013] Optionally, two or more groups of telescopic connectors are arranged on each of the two first plate bodies.

[0014] Optionally, the power mechanism comprises a second telescopic cylinder, one end of the second telescopic cylinder being connected to the vehicle frame, and the other end of the second telescopic cylinder being connected to the displacement base.

[0015] Optionally, when the lifting arm is in the working state, the telescopic roller is in the retracted state and away from the guide groove, and the telescopic connector is inserted into the connector hole.

[0016] Compared with the prior art, the present application has at least the following beneficial effects: By arranging the first driving member and the second driving member, the entire superstructure including the slewing ring and the lifting arm can be moved forward and backward, so that the size of the entire machine can be controlled within the shortest range, the machine is more flexible and compact during driving, the center of gravity of the entire machine in the driving state can be reasonably arranged under the condition that the weight of the entire machine is constant, the axle load balance state is optimized, and the service life of the driving system is prolonged, the position of the rotation center can be moved to the center of the front and rear legs under the condition that the layout of the chassis is constant, the stability of the entire machine during operation is improved, the operation range can be further expanded under the condition that the position of the chassis is unchanged during ground operation, and the crane has stronger market adaptability.

[0017] Through the structural design of the position changing base, when the upper installation needs to be moved, the telescopic connector is retracted, then the telescopic roller is extended and moved along the guide groove to drive the upper installation to move, when the upper installation needs to be operated, the telescopic roller is retracted and the telescopic connector is extended, so that the upper installation can be stably supported, and the extrusion deformation of the sliding block is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 is a structural schematic diagram of the crane in the embodiment of the present application; Figure 2 is a schematic diagram of the crane sliding to another position in the embodiment of the present application; Figure 3 is a partial schematic diagram of the crane in the embodiment of the present application; Figure 4 is a schematic diagram of the position changing base in the embodiment of the present application; Figure 5 is a schematic diagram for embodying the connection relationship between the position changing base and the vehicle frame; Figure 6 is a partial schematic diagram of the vehicle frame in the embodiment of the present application; EXPLANATION OF REFERENCE NUMERALS: 1, vehicle frame; 2, rotary table; 3, hoisting arm; 4, slewing bearing; 5, position changing base; 51, second telescopic cylinder; 52, mounting seat; 53, first plate body; 54, second plate body; 55, third plate body; 56, reinforcing rib; 6, locking support mechanism; 61, telescopic connector; 611, third telescopic cylinder; 612, plug block; 62, connector hole; 7, guide limiting piece; 71, telescopic roller; 711, first telescopic cylinder; 712, roller; 72, guide groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, and is by no means any limitation on the present application and its application or use.

[0021] It should be noted that like numerals and letters refer to like items throughout the several views, and once an item is defined in one view, it should not require further defining and explaining in subsequent views.

[0022] Some embodiments of the present application will be described in detail with reference to the drawings, which are given by way of illustration and are not limitative of the present application. The following embodiments and features thereof, which are described below, can be combined with each other unless they conflict. Embodiment 1

[0023] As shown in Figure 1 and Figure 2 , a crane is characterized in that it comprises: a vehicle frame 1; a slewing platform 2 rotatable about an axis extending in a first direction relative to the vehicle frame 1 and movable in a second direction relative to the vehicle frame 1, the first direction being perpendicular to the second direction; a lifting arm 3 having one end fixed to the slewing platform 2; a first driving member for driving the slewing platform 2 to rotate about the axis extending in the first direction relative to the vehicle frame 1; a second driving member for driving the slewing platform 2 to move in the second direction relative to the vehicle frame 1.

[0024] The first driving member can drive the slewing platform 2 to rotate, and the second driving member can drive the entire superstructure including the slewing platform 2 and the lifting arm 3 to move forward and backward, so that the overall size of the crane can be controlled within the shortest range, and the crane can be more flexible and maneuverable when running. At the same time, the center of gravity of the crane in the running state can be reasonably arranged under the condition that the weight of the crane is constant, and the axle load balance state is optimized, so that the service life of the running system can be prolonged. In the case of a certain chassis layout, the rotation center position can be moved to the center of the front and rear legs to improve the stability of the crane operation. Or in the case that the chassis support position is unchanged, the operation range can be further expanded, so that the crane has stronger market adaptability.

[0025] It should be noted that in the present embodiment, the first direction is the upward and downward direction, and the second direction is the front and rear direction, wherein the upward and downward, front and rear, and left and right directions are relative to the vehicle frame 1. Embodiment 2

[0026] The difference between the present embodiment and embodiment 1 is that: As shown in Figure 3 , the first driving member in the present embodiment comprises a slewing bearing 4 and a driving mechanism for driving the inner ring of the slewing bearing 4 to rotate, and the slewing bearing 4 is arranged on the second driving member and its inner ring is connected with the slewing platform 2. The driving mechanism can be a driving motor or the like, and any mechanism capable of driving the inner ring of the slewing bearing to rotate can be used.

[0027] AsFigure 4 and Figure 5 As shown, the second driving component includes a displacement base 5 and a power mechanism for driving the displacement base 5 to move relative to the frame 1 in a second direction; specifically, the power mechanism includes a second telescopic cylinder 51, one end of which is connected to the frame 1 and the other end is connected to the displacement base 5.

[0028] The displacement base 5 is slidably connected to the frame 1 and connected to the outer ring of the slewing bearing 4; a locking support mechanism 6 is arranged between the frame 1 and the displacement base 5, which is used to lock the displacement base 5 onto the frame 1 and support the displacement base 5.

[0029] Driven by the power mechanism (second telescopic cylinder 51), the displacement base 5 moves along the second direction, which drives the upper structure such as the slewing bearing (the slewing bearing, turntable 2, and lifting arm 3 are collectively referred to as the upper structure) to move, so that the entire upper structure can move back and forth; the turntable 2 can be driven to rotate through the action of the drive mechanism.

[0030] like Figure 6 As shown, in this embodiment, the locking support mechanism 6 includes a telescopic connector 61 arranged on the displacement base 5 and a plurality of insertion holes 62 arranged on the side plate of the frame 1. When the telescopic connector 61 is in the extended state, it is inserted into the insertion hole 62; when it is in the retracted state, it is away from the insertion hole 62. The plurality of insertion holes 62 are arranged along the second direction. By moving the displacement base 5 along the frame 1, the telescopic connector 61 can be aligned and inserted into different insertion holes 62. The telescopic connector includes a third telescopic cylinder 611 and an insertion block 612. The fixed end of the third telescopic cylinder 611 is connected to the displacement base 5, and its telescopic end is connected to the insertion block 612. The insertion block 612 is used to insert into the insertion hole 62.

[0031] The displacement base 5 includes a mounting base 52 and two first plates 53, two second plates 54, and two third plates 55 connected to the mounting base 52. The two third plates 55 are arranged on the innermost side, and the two first plates 53 are arranged on the outer sides of the two second plates 54. The third plates 55 and the second plates 54 are connected by reinforcing ribs 56. A slewing bearing is connected to the mounting base 52. One end of the power mechanism is connected to the frame 1, and the other end is hinged to the two third plates 55. The fixed end of the telescopic connector 61 is connected to the first plate 53 and inserted into the second plate 54, with its telescopic end facing the side plate of the frame 1 (the frame 1 has a side plate; in this embodiment, the side plate is located between the first plate 53 and the second plate 54). This structure provides the displacement base 5 with high stability and load-bearing capacity.

[0032] To improve the stability of the displacement base 5 for the upper support, two or more sets of the telescopic connectors 61 are arranged on each of the two first plates.

[0033] The crane in the embodiment further comprises a guide limiting member 7 arranged between the vehicle frame 1 and the displacement base 5, the guide limiting member 7 comprising a guide groove 72 extending along the second direction on the vehicle frame 1 and a telescopic roller 71 arranged on the displacement base 5, the telescopic roller 71 rolling along the guide groove 72.

[0034] The telescopic roller 71 comprises a first telescopic cylinder 711 and a roller 712, the fixed end of the first telescopic cylinder 711 being connected with the displacement base 5 and the telescopic end being connected with the roller 712. When the lifting arm 3 is in the working state, the telescopic roller 71 is in the retracted state and away from the guide groove 72, and the telescopic plug-in member 61 is plugged into the plug-in hole 62.

[0035] Through the structural design of the displacement base 5, when the upper assembly needs to be moved, the telescopic plug-in member 61 is retracted, and then the telescopic roller 71 is extended and moved along the guide groove 72 to drive the upper assembly to move; when the upper assembly needs to be worked, the telescopic roller 71 is retracted and the telescopic plug-in member 61 is extended, so that the upper assembly can be stably supported, and the extrusion deformation of the sliding block is avoided.

[0036] When the upper assembly needs to be displaced for work, the second telescopic cylinder 51 pulls the displacement base 5 to move, the friction is reduced through the roller 712, the roller 712 rolls in the guide groove 72 on the side plate of the vehicle frame 1, after reaching the target position, the third telescopic cylinder 611 is extended, the plug block 612 is inserted into the plug-in hole 62 on the vehicle frame 1, the vehicle frame 1 and the displacement base 5 are fixed, and the upper assembly working load is borne, then the first telescopic cylinder 711 is retracted, the roller 712 is retracted, and the vehicle frame 1 is separated from the guide groove 72, so that the roller 712 is not stressed during the upper assembly work. After the upper assembly work is completed, the lifting arm 3 is retracted to the running state, the first telescopic cylinder 711 is extended, the roller 712 is extended into the guide groove 72 of the vehicle frame 1, then the third telescopic cylinder 611 is retracted, and the vehicle frame 1 is separated, then the second telescopic cylinder 51 is operated to drive the displacement base 5 to move along the guide groove 72, and then the entire upper assembly is moved to the running state position, then the third telescopic cylinder 611 is extended, the plug block 612 is inserted into the other plug-in hole 62 of the vehicle frame 1, and then the position of the upper assembly is locked, and the vehicle can run normally.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connection” should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, some improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A crane, characterized in that, include: Frame; The turntable is rotatable relative to the frame about an axis extending in a first direction, and is movable relative to the frame in a second direction. The crane boom has one end fixed to the turntable; A first driving member is used to drive the turntable to rotate relative to the frame about an axis extending along a first direction; The second driving component is used to drive the turntable to move relative to the frame in a second direction.

2. The crane according to claim 1, characterized in that, The first driving member includes a slewing bearing and a driving mechanism for driving the inner ring of the slewing bearing to rotate. The slewing bearing is arranged on the second driving member and its inner ring is connected to the turntable.

3. The crane according to claim 2, characterized in that, The second drive unit includes a displacement base and a power mechanism for driving the displacement base to move relative to the frame in a second direction; The displacement base is slidably connected to the frame and connected to the outer ring of the slewing bearing; a locking support mechanism is arranged between the frame and the displacement base, which is used to lock the displacement base to the frame and support the displacement base.

4. The crane according to claim 3, characterized in that, The locking support mechanism includes a telescopic connector arranged on the displacement base and several insertion holes arranged on the side plate of the frame. When the telescopic connector is in the extended state, it is inserted into the insertion holes. The several insertion holes are arranged along the second direction. By sliding the displacement base along the frame, the telescopic connector can be aligned and inserted into different insertion holes.

5. The crane according to claim 4, characterized in that, It also includes a guide limiting member disposed between the frame and the displacement base, the guide limiting member including a guide groove extending along a second direction on the frame and a telescopic roller disposed on the displacement base, the telescopic roller rolling along the guide groove.

6. The crane according to claim 5, characterized in that, The telescopic roller includes a first telescopic cylinder and a roller. The fixed end of the first telescopic cylinder is connected to the displacement base, and its telescopic end is connected to the roller.

7. The crane according to claim 4, characterized in that, The displacement base includes a mounting base and two first plates, two second plates, and two third plates connected to the mounting base, wherein the two third plates are arranged on the innermost side and the two first plates are arranged on the outer side of the two second plates. The slewing bearing is connected to the mounting base; One end of the power mechanism is connected to the vehicle frame, and the other end is hinged to two third plates; The fixed end of the telescopic connector is connected to the first plate, and its telescopic end faces the side plate of the frame.

8. The crane according to claim 4, characterized in that, Two or more sets of the telescopic connectors are arranged on each of the two first plates.

9. The crane according to claim 3, characterized in that, The power mechanism includes a second telescopic cylinder, one end of which is connected to the vehicle frame and the other end of which is connected to the displacement base.

10. The crane according to claim 5, characterized in that, When the crane boom is in operation, the telescopic roller is in a retracted state and away from the guide groove, and the telescopic connector is inserted into the connector hole.

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