Novel four-lifting-point lifting appliance

Abstract

The utility model discloses a novel four-lifting-point lifting appliance which comprises a bridge frame, a movable trolley frame, a winding drum lifting mechanism and a lifting mechanism, the movable trolley frame is installed on the bridge frame, the winding drum lifting mechanism is installed on the movable trolley frame, and the lifting mechanism is arranged below the winding drum lifting mechanism. Four groups of pulley block mechanisms which are symmetrically arranged and are used for improving the stability of the hoisting mechanism are mounted between the hoisting mechanism and the winding drum hoisting mechanism; and the hoisting mechanism comprises a hoisting part and a movable part. According to the utility model, through the rotation of the lead screw, the sliding block can be driven to slide in the sliding chute, and then the lifting hook piece arranged on the connecting plate can be driven to carry out position adjustment, so that the position of the lifting hook piece is more suitable for a lifting connecting point of a workpiece, and the lifting effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crane technical field especially relates to a novel four lifting point lifting appliance. BACKGROUND

[0002] The lifting mechanism in the domestic crane equipment is generally single hook or double hook, even if there is double hook to simultaneously lift heavy objects, the synchronization effect between each lifting mechanism is not very strict, only needs to let each mechanism simultaneously lift and lower, this is determined by the working condition or the characteristics of the heavy object itself, but there are some special conditions, when lifting heavy objects, four lifting points of the lifting appliance need to realize complete synchronization, and the lifting appliance needs to be absolutely horizontal when lifting and lowering to improve the lifting effect, this working condition makes higher requirements on the lifting appliance, and it is difficult to solve the synchronization problem through electrical control alone.

[0003] Through the search, the utility model patent file with the announcement number CN210825204U discloses a high-precision four-lifting-point synchronous lifting appliance, including the frame of crane, the frame top is equipped with lifting mechanism, the frame lower part is equipped with four-point lifting appliance, lifting mechanism passes through the wire rope and connects four-point lifting appliance, the wire rope and four-point lifting appliance junction is equipped with tension sensor, tension sensor connects controller, four-point lifting appliance outer periphery is equipped with a plurality of hollow guide cone sleeves, the upper of guide cone is equipped with telescopic guide cone rod, the end away from guide cone sleeve of guide cone rod and the lower part of frame fixed connection.

[0004] When lifting workpieces of different shapes and sizes, the position of the lifting hook needs to be adjusted so that the lifting hook can better correspond to the lifting point of the workpiece, in the above-mentioned lifting appliance, the position of the lifting hook is fixed on the lower surface of the four-point lifting appliance, and it is not easy to adjust the position of the lifting hook, if the lifting hook is misaligned with the lifting point of the workpiece, the center of gravity of the workpiece will be offset, and tilting or shaking will occur during lifting, increasing the risk of loss of control and collision during lifting. Utility model content

[0005] The utility model aims at providing a novel four-lifting-point lifting appliance, which can change the position of the lifting hook to better correspond the position of the lifting hook and the lifting point of the workpiece, and improve the stability of the lifting process.

[0006] The utility model adopts the following technical scheme:

[0007] A novel four-lifting-point lifting appliance, comprising a bridge, a mobile trolley frame, a drum lifting mechanism, and a lifting mechanism, the mobile trolley frame is installed on the bridge, the drum lifting mechanism is installed on the mobile trolley frame, the lifting mechanism is arranged below the drum lifting mechanism, four groups of symmetrically arranged pulley block mechanisms for improving the stability of the lifting mechanism are installed between the lifting mechanism and the drum lifting mechanism, the lifting mechanism comprises a lifting part and a movable part, the lifting part is connected with the pulley block mechanism,

[0008] The lifting part comprises a lifting frame, and the movable part comprises a cross-shaped mounting frame and four connecting plates for mounting hook members.

[0009] Optionally, the winding drum lifting mechanism comprises a driving unit, three vertically arranged first supporting beams, two transversely arranged second supporting beams and a winding drum assembly symmetrically arranged on the upper surfaces of the first supporting beams.

[0010] Optionally, the first supporting beams and the second supporting beams are fixedly connected to each other by bolts.

[0011] Optionally, the driving unit is fixedly arranged on the upper surface of the middle first supporting beam and connected to the winding drum assembly.

[0012] Optionally, a mounting groove in communication with the outside is arranged in the middle of the lifting frame, and the mounting frame is fixedly arranged in the mounting groove of the lifting frame.

[0013] Optionally, four mutually perpendicular sliding grooves are arranged on the upper surface of the mounting frame, a screw rod is rotatably arranged in each sliding groove, a sliding block is threadedly arranged on the surface of the screw rod, and the sliding block slides in the sliding groove.

[0014] Optionally, a through groove in communication with the outside is symmetrically arranged on the inner bottom surface of the sliding groove, and two connecting plates are fixedly arranged on the lower end surface of the sliding block and slide in the through groove.

[0015] Optionally, the pulley block mechanism comprises a first pulley block, a second pulley block, a third pulley block and a fourth pulley block, the first pulley block is fixedly arranged on the upper surface of the lifting frame, the second pulley block is fixedly arranged on the upper surface of the second supporting beam, the third pulley block is fixedly arranged on the outer side surface of the second supporting beam, and the fourth pulley block is fixedly arranged on the upper surface of the lifting frame away from the first pulley block.

[0016] Optionally, a fixed plate is fixedly arranged on the outer side surface of the second supporting beam corresponding to the position of the fourth pulley block.

[0017] In summary, the utility model has the following beneficial effects:

[0018] 1、in the utility model, the rotation of the screw rod can drive the sliding block to slide in the sliding groove, and then the hook member mounted on the connecting plate can be adjusted in position, so that the position of the hook member is more suitable for the lifting connection point of the workpiece, and the lifting effect is improved.

[0019] 2、in the utility model, the cooperation and connection of the steel wire rope and the plurality of pulley block mechanisms can distribute the load on the lifting frame to multiple connection points, reduce the stress on a single point, reduce the safety risk in the lifting process, effectively reduce the shaking of the lifting frame in the lifting process, and improve the stability of the lifting process. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The whole structure schematic diagram of the utility model

[0021] Figure 2 The structure schematic diagram of the hoisting part of the utility model Figure 1 ;

[0022] Figure 3 The structure schematic diagram of the hoisting part of the utility model Figure 2 ;

[0023] Figure 4 The structure schematic diagram of the hoisting part of the utility model Figure 3 .

[0024] In the figure, 1, bridge frame; 2, mobile trolley frame; 3, drum hoisting mechanism; 4, hoisting assembly; 5, pulley block mechanism; 31, first support beam; 32, drum assembly; 33, drive unit; 34, second support beam; 341, fixed plate; 41, hoisting frame; 42, mounting frame; 421, sliding groove; 422, through slot; 43, lead screw; 44, sliding block; 441, connecting plate; 45, drive motor; 51, first pulley block; 52, second pulley block; 53, third pulley block; 54, fourth pulley block. DETAILED DESCRIPTION

[0025] The principles and spirits of the utility model will be explained in detail below with reference to several representative embodiments of the utility model.

[0026] Please refer to Figures 1-4 , the utility model will be described in detail below in combination with the drawings and examples:

[0027] As Figures 1-2 shown, a novel four-lifting-point lifting appliance includes a bridge frame 1, a mobile trolley frame 2, a drum hoisting mechanism 3 and a hoisting mechanism, the mobile trolley frame 2 is installed on the bridge frame 1, the drum hoisting mechanism 3 is installed on the mobile trolley frame 2, the drum hoisting mechanism 3 is driven to move horizontally by the mobile trolley frame 2, the hoisting mechanism is arranged below the drum hoisting mechanism 3, four groups of symmetrical pulley block mechanisms 5 for improving the stability of the hoisting mechanism are installed between the hoisting mechanism and the drum hoisting mechanism 3, and the hoisting mechanism includes a hoisting part and a movable part.

[0028] The above-mentioned bridge frame 1 and mobile trolley frame 2 are prior art, the bridge frame 1 serves as the main frame of a bridge crane, spans above the tracks on both sides of a workshop or warehouse, and the mobile trolley frame 2 moves horizontally on the track of the bridge frame 1 to drive the drum hoisting mechanism 3 to move.

[0029] As Figure 2As shown in the drawings, the drum lifting mechanism 3 comprises a driving unit 33, three vertically arranged first support beams 31, two transversely arranged second support beams 34 and a drum assembly 32 symmetrically arranged on the upper surface of the first support beam 31, and the first support beam 31 and the second support beam 34 are fixedly connected to each other by bolts.

[0030] As shown in the drawings, Figure 2 The driving unit 33 is fixedly installed on the upper surface of the middle first support beam 31 and is connected to the drum assembly 32 for driving the movement of the drum assembly 32. The driving unit 33 and the drum assembly 32 are both prior art and will not be described in detail here.

[0031] As shown in the drawings, Figure 2 In this embodiment, the lifting part comprises a lifting frame 41, and the movable part comprises a cross-shaped mounting bracket 42 and four groups of connecting plates 441 for mounting lifting hooks.

[0032] As shown in the drawings, Figure 2 The main frame of the lifting frame 41 is composed of hollow rigid connecting rods, which can reduce the overall weight of the lifting frame 41. The middle part of the lifting frame 41 is provided with a mounting groove communicating with the outside, and the mounting bracket 42 is fixedly arranged in the mounting groove of the lifting frame 41.

[0033] As shown in the drawings, Figure 2 and Figure 4 The upper surface of the mounting bracket 42 is provided with four mutually perpendicular sliding grooves 421, and a lead screw 43 is rotatably arranged in the sliding groove 421. The surface of the lead screw 43 is provided with a sliding block 44 in a threaded manner, and the sliding block 44 slides in the sliding groove 421. The inner bottom surface of the sliding groove 421 is symmetrically provided with a through groove 422 communicating with the outside. Two connecting plates 441 are fixedly arranged on the lower end surface of the sliding block 44, and the connecting plates 441 slide in the through groove 422. The combined use of the two connecting plates 441 can facilitate the installation of the lifting hook.

[0034] Specifically, by rotating the lead screw 43, the sliding block 44 can be driven to slide in the sliding groove 421, and then the lifting hook installed on the connecting plate 441 can be driven to adjust the position, so that the position of the lifting hook is more suitable for the lifting connection point of the workpiece, and the lifting effect is improved.

[0035] As shown in the drawings, Figure 2 A driving motor 45 is fixedly arranged on the outer side surface of the lifting frame 41, and one end of the lead screw 43 is fixedly connected to the driving motor 45. The driving motor 45 is used to drive the rotation of the lead screw 43.

[0036] As shown in the drawings, Figure 3 In this embodiment, the pulley block mechanism 5 comprises a first pulley block 51, a second pulley block 52, a third pulley block 53 and a fourth pulley block 54. The pulley blocks are all composed of pulleys and fixed seats, and the pulleys are rotatably arranged on the fixed seats, which are prior art.

[0037] As Figure 3 shown, the first pulley set 51 is fixedly arranged on the upper surface of the hoisting frame 41, the second pulley set 52 is fixedly arranged on the upper surface of the second support beam 34, the third pulley set 53 is fixedly arranged on the outer side surface of the second support beam 34, and the fourth pulley set 54 is fixedly arranged on the upper surface of the hoisting frame 41 away from the first pulley set 51.

[0038] As Figure 3 shown, in this embodiment, the outer side surface of the second support beam 34 is fixedly arranged with a fixed plate 341 at a position corresponding to the fourth pulley set 54.

[0039] Specifically, the steel wire rope wound off from the winding drum assembly 32 first passes through the first pulley set 51 and is in sliding fit, then passes through the second pulley set 52 and is in sliding fit, then passes through the third pulley set 53 and is in sliding fit, then passes through the fourth pulley set 54 and is in sliding fit, and finally the outer end of the steel wire rope is fixedly arranged on the lower surface of the fixed plate 341. Through the cooperation and connection of the steel wire rope and the plurality of pulley set mechanisms 5, the load on the hoisting frame 41 can be distributed to a plurality of connection points, the single-point stress is reduced, the safety risk in the hoisting process is reduced, and the shaking of the hoisting frame 41 in the hoisting process can be effectively reduced, and the stability of the hoisting process is improved.

[0040] As some terms are used in the description and claims to refer to certain components. Those skilled in the art should understand that hardware manufacturers may use different names to refer to the same component. The description and claims of this specification do not distinguish components by name differences, but by functional differences. As mentioned throughout the description and claims, "comprising" is an open term, which should be interpreted as "including but not limited to". "Approximately" means within an acceptable error range, and those skilled in the art can solve the technical problems within a certain error range, and basically achieve the technical effects.

[0041] It should be noted that the terms "comprise", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the goods or systems comprising a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such goods or systems. Without more limitations, the element defined by the sentence "comprising a" does not exclude the presence of another identical element in the goods or system comprising the element.

[0042] The foregoing description illustrates and describes several preferred embodiments of the present application. However, it is to be understood that the application is not limited to the precise forms described, and that changes can be made therein without departing from the scope of the present application. Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. Therefore, the specification and examples are to be considered exemplary only, with a true scope and spirit of the application being indicated by the following claims.

Claims

1. A new four-point lifting spreader, characterized in that: The bridge, the mobile trolley frame, the winding drum lifting mechanism and the lifting mechanism are included, the mobile trolley frame is installed on the bridge, the winding drum lifting mechanism is installed on the mobile trolley frame, the lifting mechanism is arranged below the winding drum lifting mechanism, four groups of symmetrically arranged pulley block mechanisms for improving the stability of the lifting mechanism are installed between the lifting mechanism and the winding drum lifting mechanism, the lifting mechanism includes a lifting part and a movable part, The lifting part includes a lifting frame, and the movable part includes a cross-shaped mounting bracket and four connecting plates for mounting hook members.

2. A new type of four-point lifting spreader according to claim 1, characterized in that: The winding drum lifting mechanism includes a driving unit, three vertically arranged first support beams, two transversely arranged second support beams and a winding drum assembly symmetrically arranged on the upper surface of the first support beam.

3. A new type of four-point lifting spreader according to claim 2, characterized in that: The first support beam and the second support beam are connected and fixed to each other by bolts.

4. A new type of four-point lifting spreader according to claim 2, characterized in that: The driving unit is fixedly installed on the upper surface of the middle first support beam, and the driving unit is connected with the winding drum assembly.

5. A new type of four-point lifting spreader according to claim 1, characterized in that: The lifting frame is provided with an installation groove communicated with the outside in the middle part, and the mounting bracket is fixedly arranged in the installation groove of the lifting frame.

6. A new type of four-point lifting spreader as claimed in claim 1, characterized in that: The upper surface of the mounting bracket is provided with four mutually perpendicular sliding grooves, a lead screw is rotatably arranged in the sliding groove, a sliding block is threadedly arranged on the surface of the lead screw, and the sliding block slides in the sliding groove.

7. A new type of four-point lifting spreader according to claim 1, characterized in that: The inner bottom surface of the sliding groove is symmetrically provided with a through groove communicated with the outside, two connecting plates are fixedly arranged on the lower end surface of the sliding block, and the connecting plates slide in the through groove.

8. A new type of four-point lifting spreader as claimed in claim 2, characterized in that: The pulley block mechanism includes a first pulley block, a second pulley block, a third pulley block and a fourth pulley block, the first pulley block is fixedly arranged on the upper surface of the lifting frame, the second pulley block is fixedly arranged on the upper surface of the second support beam, the third pulley block is fixedly arranged on the outer side surface of the second support beam, and the fourth pulley block is fixedly arranged on the upper surface of the lifting frame away from the first pulley block.

9. A new type of four-point lifting spreader according to claim 8, characterized in that: The outer side surface of the second support beam is provided with a fixed plate at a position corresponding to the fourth pulley block.

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