Lifting appliance for horizontally lifting workpiece from end face

Abstract

The utility model relates to a lifting appliance for horizontally lifting a workpiece from an end face, which is used for completely loading a reinforcing plug into an interference fit hole at one time after horizontally lifting the reinforcing plug from the end face, and comprises a lifting bracket with a lifting hole, and a push rod and a lifting plate which are respectively welded together with the left side face and the right side face of the lifting bracket, the cross beam is provided with five hoisting holes, and the right side surface of the vertical beam is welded with the hoisting plate; the left side face of the vertical beam is welded to the push rod. The lifting plate is a square steel plate, through holes are formed in the long and wide faces of the lifting plate, the reinforcing plug and the lifting plate are fixed together through bolts and threaded holes in the end face of the reinforcing plug, and assembly positioning datum planes are further milled on the long and wide faces, connected with the reinforcing plug, of the lifting plate. And the positioning size requirement can be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of interference fit assembly and positioning of shafts and holes, and particularly relates to a hoist for hoisting a workpiece horizontally from the end face, which can hoist a reinforcing plug with a diameter of more than φ500mm and a length of 500mm horizontally from the end face and completely fit it into an interference fit hole for positioning at one time. Background Art

[0002] In recent years, with the continuous development and progress of the wind power industry, the number of small-power wind turbine shaft installations has gradually decreased. The number of high-power wind turbine shaft installations has increased significantly, but due to the high power, the overall size of the wind power main shaft has also increased, resulting in a lot of weight increase, which has brought a series of high costs to the subsequent production and assembly. For this reason, the main shaft of the high-power wind power generation has been designed as a hollow main shaft to reduce the weight and greatly reduce the production cost; but it is necessary to insert a reinforcing plug with a diameter of > φ500mm, a length of about 500mm, and a weight of about 800Kg into the center hole of the small end of the main shaft through interference fit, and the end face of the reinforcing plug must be 15±5mm lower than the end face of the small end of the main shaft. If the reinforcing plug is installed into the main shaft hole by vertical lifting from top to bottom, it can no longer meet the positioning requirements. The only way to install the reinforcing plug into the main shaft hole at one time is to lift it horizontally from the end face. For this reason, it is necessary to design a hoist that lifts the workpiece horizontally from the end face. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the existing lifting technology and provide a lifting device that can be used to install a reinforcing plug with a diameter of more than φ500mm, a length of about 500mm, and a weight of about 800Kg into the small end of the main shaft of a hollow fan by horizontal one-time interference fit, and ensure that the end face of the reinforcing plug is 15±5mm lower than the end face of the small end of the main shaft, and the lifting device has a simple structure, convenient loading and unloading, low cost, and easy operation, while ensuring the assembly positioning size.

[0004] The purpose of the utility model is achieved in this way:

[0005] A lifting device for lifting a workpiece horizontally from an end face comprises a lifting bracket with a lifting hole, a push rod and a lifting plate respectively welded to the left and right sides of the lifting bracket.

[0006] The hoisting bracket is a "7"-shaped structural steel plate, which is divided into a horizontal beam and a vertical beam. The horizontal beam is provided with hoisting holes with spacing. When hoisting, different hole positions are selected to facilitate the adjustment of the level of the reinforcing plug; a hoisting plate is welded on the right side of the vertical beam, and a push rod is welded on the left side of the vertical beam;

[0007] The hanging plate is a square steel plate with a hanging plate through hole on its length and width surfaces and a threaded hole on the end surface of the reinforcing plug. Bolts pass through the hanging plate through holes and are connected to the threaded holes on the end surface of the reinforcing plug to fix the reinforcing plug and the hanging plate together. An assembly positioning reference surface is also milled on the length and width surfaces of the hanging plate connected to the reinforcing plug.

[0008] Five φ50mm hoisting holes with intervals are opened on the crossbeam of the hoisting bracket. By selecting the positions of different holes, the horizontal position of the reinforcement plug can be adjusted during hoisting.

[0009] Two φ26mm through holes are provided on the length and width of the lifting plate. The reinforcing plug is fixed to the lifting plate by two high-strength M24 bolts and two M24 threaded holes on the end face of the reinforcing plug.

[0010] The lifting bracket is a 50mm thick "7"-shaped structural steel plate.

[0011] The hoisting plate is a 400mm×400mm square steel plate with a thickness of 30mm.

[0012] The push rod is a "T"-shaped structural assembly weldment, which is used by the operator to support and push the entire hanger horizontally with his hands to drive the reinforcing plug into the matching small end hole of the hollow fan main shaft.

[0013] The utility model will achieve the following effects after adopting the above technical scheme: when in use, two high-strength hexagonal M24 bolts are passed through the two φ26mm holes of the lifting plate, screwed into the two M24 threaded holes on the end face of the reinforcing plug, the lifting plate and the reinforcing plug are fastened together, and then the reinforcing plug is lifted horizontally. After lifting, the front, rear, left and right positions of the reinforcing plug are slightly adjusted by the overhead crane. After measuring the height with the axis of the small end aperture of the hollow fan main shaft, the push rod is slowly pushed by hand to push the reinforcing plug into the small end hole of the hollow fan main shaft at one time (Note: before assembly, the small end hole of the hollow fan main shaft is heated and expanded first, and the assembly is started only after the aperture size expands to 0.8mm larger than the plug). When the positioning reference surface of the lifting plate is just against the end face of the small end hole of the hollow fan main shaft, the assembly position of the reinforcing plug in the small end hole of the hollow fan main shaft is just qualified; then unscrew the two M24 bolts, separate the lifting plate from the reinforcing plug, and adjust it away from the entire lifting device to complete it. The use of this type of sling assembly has the advantages of simple structure, convenient loading and unloading, low cost, quick and convenient operation for operators, and at the same time can ensure the positioning size requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the lifting device structure for lifting the workpiece horizontally from the end face.

[0015] Figure 2 Schematic diagram of the structure of the lifting device used to lift the workpiece horizontally from the end face

[0016] Indicating Figure 1 1. Lifting bracket, 2. Lifting plate, 3. Push rod; in the schematic diagram Figure 2 Middle: 4 hollow fan main shaft, 5 reinforcement plug. DETAILED DESCRIPTION

[0017] like Figure 1 , 2 As shown, a lifting device for lifting a workpiece horizontally from an end face comprises a lifting bracket 1 with a lifting hole, a push rod 3 and a lifting plate 2 respectively welded to the left and right sides of the lifting bracket 1, characterized in that:

[0018] The hoisting bracket 1 is a 50mm thick "7" shaped structural steel plate. It is divided into a horizontal beam and a vertical beam. The horizontal beam has 5 hoisting holes with a small spacing of φ50mm. When hoisting, different hole positions are selected to facilitate the adjustment of the level of the reinforcing plug 5; the right side of the vertical beam is welded to the hoisting plate 2; the left side of the vertical beam is welded to the push rod 3;

[0019] The hanging plate 2 is a 30mm thick 400mm×400mm square steel plate with two φ26mm through holes on the length and width. The two high-strength M24 bolts and the two M24 threaded holes on the end surface of the reinforcing plug 5 can be used to fix the reinforcing plug 5 to the hanging plate 2. An assembly positioning reference surface is also milled on the length and width of the hanging plate 2 connected to the reinforcing plug 5, which is used to control the depth of the reinforcing plug 5 in the hole of the hollow fan main shaft 4 during assembly.

[0020] The push rod 3 is a "T"-shaped structural assembly weldment, which is mainly used for the operator to support and push the entire hanger horizontally with his hands to drive the reinforcing plug 5 into the small end hole of the matching hollow fan main shaft 4.

[0021] When in use, pass two high-strength hexagonal M24 bolts through the two φ26mm holes of the hoisting plate 2, screw them into the two M24 threaded holes on the end face of the reinforcing plug 5, and fasten the hoisting plate 2 and the reinforcing plug 5 together. First, test whether the reinforcing plug 5 is level. If not, replace the position of the hoisting holes on the crossbeam of the hoisting bracket 1 until the reinforcing plug 5 is hoisted horizontally; then use the overhead crane to slightly adjust the front, back, left, and right positions of the reinforcing plug 5, and after measuring the height with the axis of the small end aperture of the hollow fan main shaft 4, slowly push the push rod 3 by hand to lift the reinforcing plug 5. The plug 5 is pushed into the small end hole of the main shaft of the hollow fan at one time (Note: before assembly, the small end hole of the main shaft of the hollow fan is heated and expanded, and the hole size is expanded to 0.8mm larger than the plug before assembly begins). During the assembly process, when the positioning reference surface of the lifting plate 2 just touches the end face of the small end hole of the main shaft of the hollow fan, the assembly position of the reinforcing plug 5 in the small end hole of the main shaft of the hollow fan is just qualified; then unscrew the two M24 bolts, separate the lifting plate 2 from the reinforcing plug 5, and move away from the entire lifting device to complete. The assembly of this lifting device has a simple structure, convenient loading and unloading, low cost, and is convenient for operators to operate quickly and conveniently, while ensuring the positioning size requirements.

Claims

1. A lifting device for lifting a workpiece horizontally from an end face, comprising a lifting bracket (1) with a lifting hole, a push rod (3) respectively welded to the left and right sides of the lifting bracket (1), and a lifting plate (2), characterized in that: The hoisting bracket (1) is a "7"-shaped structural steel plate, which is divided into a horizontal beam and a vertical beam. The horizontal beam is provided with hoisting holes with spacing. When hoisting, different hole positions are selected to facilitate adjustment of the level of the reinforcing plug (5); a hoisting plate (2) is welded on the right side of the vertical beam, and a push rod (3) is welded on the left side of the vertical beam; The hanging plate (2) is a square steel plate, and a hanging plate through hole is opened on its length and width surface, and a threaded hole is opened on the end surface of the reinforcing plug (5). Bolts pass through the hanging plate through hole and are connected to the threaded hole on the end surface of the reinforcing plug (5), so as to fix the reinforcing plug (5) and the hanging plate (2) together. An assembly positioning reference surface is also milled on the length and width surface of the hanging plate (2) connected to the reinforcing plug (5).

2. A lifting device for lifting a workpiece horizontally from an end face according to claim 1, characterized in that: Five φ50 mm hoisting holes with intervals are provided on the crossbeam of the hoisting bracket (1). By selecting the positions of different holes, the horizontal position of the reinforcing plug (5) can be adjusted during hoisting.

3. A lifting device for lifting a workpiece horizontally from an end face according to claim 1, characterized in that: Two φ26 mm through holes are provided on the long and wide surfaces of the hanging plate (2), and the reinforcing plug (5) is fixed to the hanging plate (2) by two high-strength M24 bolts and two M24 threaded holes on the end surface of the reinforcing plug (5).

4. A lifting device for lifting a workpiece horizontally from an end face according to claim 1, characterized in that: The hoisting bracket (1) is a 50 mm thick "7" shaped structural steel plate.

5. The lifting device for lifting a workpiece horizontally from an end face according to claim 1, characterized in that: The hoisting plate (2) is a 30 mm thick 400 mm×400 mm square steel plate.

6. A lifting device for lifting a workpiece horizontally from an end face according to claim 1, characterized in that: The push rod (3) is a "T"-shaped structural assembly weldment, and is used by an operator to support and horizontally push the entire lifting device with his hands to drive the reinforcing plug (5) into the small end hole of the matching hollow fan main shaft (4).

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