Heavy rotary power screwing device

Abstract

The utility model discloses a heavy rotary power screwing device which comprises a force application nut (1) and a rotary driving mechanism. The top of the force application nut (1) is coaxially connected with a transmission shaft (11); the rotary driving mechanism comprises a driving shaft (2) and a power mechanism (3), and the power mechanism (3) is in transmission connection with the driving shaft (2) and can drive the driving shaft (2) to rotate; and the driving shaft (2) and the transmission shaft (11) are in coaxial transmission connection. The device is simple in structure and very easy and convenient to install and use, it can be guaranteed that enough acting force is output with the help of the hydraulic wrench, and therefore the requirements for tightening and disassembling the propeller spindle can be met. In addition, by arranging the lifting frame, movement of the heavy rotary power screwing device can be achieved through lifting, and using is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heavy rotating power tightening device. BACKGROUND

[0002] Currently, for the installation and dismounting of the propeller shaft of a ship, a spline nut is usually used to cooperate with the propeller shaft of the ship, a row of threaded holes is arranged on the spline nut, a lock bolt is used to fix the spline nut, and then a hand pump is used to tighten or loosen. This assembly process is time-consuming and laborious, and the hand pump cannot guarantee sufficient force. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model aims to provide a heavy rotating power tightening device.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A heavy rotating power tightening device comprises a force nut and a rotating drive mechanism; the top of the force nut is coaxially connected with a transmission shaft; the rotating drive mechanism comprises a drive shaft and a power mechanism, the power mechanism and the drive shaft are transmissionally connected and can drive the drive shaft to rotate; the drive shaft and the transmission shaft are coaxially transmissionally connected.

[0006] Further, the transmission shaft is prismatic, the inner ring of the drive shaft is prismatic and matches the transmission shaft in shape and size, and the inner ring of the drive shaft is sleeved on the outside of the transmission shaft.

[0007] Further, the top of the force nut is connected with a cross connecting frame, and the transmission shaft is arranged at the top of the cross connecting frame.

[0008] Further, the power mechanism is a hydraulic wrench.

[0009] Further, the heavy rotating power tightening device further comprises a lifting frame, and the force nut is rotatably installed on the lifting frame.

[0010] Further, the lifting frame comprises a lower annular fixing frame and an upper gantry, the top of the gantry is provided with a lifting hole, the bottom of the annular fixing frame is provided with a supporting bottom plate, the middle part of the supporting bottom plate has an opening, the inner diameter of the opening is greater than the inner diameter of the force nut and smaller than the outer diameter of the force nut.

[0011] Further, the two sides of the gantry are detachably connected with the two sides of the annular fixing frame through bolts.

[0012] Further, the bottom outer edge of the annular fixing frame is uniformly provided with a plurality of supporting feet.

[0013] The heavy rotating power tightening device has the advantages that the structure is simple, the installation and use are very convenient, the sufficient acting force can be ensured by means of the hydraulic wrench, and thus the tightening and dismounting requirements of the propeller main shaft can be met. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Figure 2 is a top view of the heavy rotating power tightening device in the embodiment of the utility model;

[0015] Figure 2 Figure 3 is a bottom view of the heavy rotating power tightening device in the embodiment of the utility model;

[0016] Figure 3 Figure 4 is a structure diagram of the force applying nut in the embodiment of the utility model;

[0017] Figure 4 Figure 5 is a structure diagram of the annular fixing frame in the embodiment of the utility model. DETAILED DESCRIPTION

[0018] The utility model will be further described below with reference to the drawings, and it should be noted that the embodiment is based on the technical scheme, and the detailed implementation mode and specific operation process are given, but the protection scope of the utility model is not limited to the embodiment.

[0019] The embodiment provides a heavy rotating power tightening device, as shown in Figure 1, which comprises a force applying nut 1 (adopting a spline nut) and a rotating driving mechanism. Figure 1 The top of the force applying nut 1 is coaxially connected with a transmission shaft 11; the rotating driving mechanism comprises a driving shaft 2 and a power mechanism 3, the power mechanism 3 and the driving shaft 2 are drivingly connected and can drive the driving shaft 2 to rotate; the driving shaft 2 and the transmission shaft 11 are coaxially drivingly connected.

[0020] In the embodiment, the transmission shaft 11 is prismatic (the embodiment is hexagonal prism), the inner circle of the driving shaft 2 is prismatic and the shape and size are matched with the transmission shaft 11, and the inner circle of the driving shaft 2 is sleeved on the outside of the transmission shaft 11.

[0021] In the embodiment, the top of the force applying nut 1 is connected with a cross connecting frame 12, and the transmission shaft 11 is arranged at the top of the cross connecting frame 12.

[0022] In the embodiment, the power mechanism 3 is a hydraulic wrench.

[0023] In the embodiment, the heavy-duty rotary power tightening device further comprises a lifting frame, and the force applying nut 1 is rotatably installed on the lifting frame. The heavy-duty rotary power tightening device of the embodiment is mainly used for tightening and disassembling the propeller shaft of a ship. In order to match the size of the propeller shaft of the ship and to be able to exert sufficient force and have sufficient structural strength, the heavy-duty rotary power tightening device is also correspondingly larger and heavier. At this time, the lifting frame can realize the lifting of the heavy-duty rotary power tightening device, facilitating the movement and use of the heavy-duty rotary power tightening device.

[0024] Further, in the embodiment, the lifting frame comprises a lower annular fixing frame 4 and an upper gantry 5, the top of the gantry 5 is provided with a lifting hole 6, the bottom of the annular fixing frame 4 is provided with a supporting bottom plate 41, the middle part of the supporting bottom plate 41 has an opening 42, the inner diameter of the opening 42 is greater than the inner diameter of the force applying nut 1 and less than the outer diameter of the force applying nut 1. The supporting bottom plate 41 supports the force applying nut 1 on the annular fixing frame 4, and the opening 42 ensures that the spline of the inner ring of the force applying nut 1 can be fully exposed, without affecting the use of the force applying nut.

[0025] In the embodiment, the two sides of the gantry 5 are detachably connected to the two sides of the annular fixing frame 4 by bolts. The detachable gantry 5 makes it more convenient and easier to operate to take out or put in the force applying nut from the annular fixing frame.

[0026] Specifically, in the embodiment, the bottom outer edge of the annular fixing frame 4 is uniformly provided with a plurality of supporting feet 43.

[0027] In use, the spline of the force applying nut 1 is matched with the propeller shaft of a ship that needs to be tightened or disassembled. When the propeller shaft of the ship needs to be tightened, the hydraulic wrench is started to drive the driving shaft 2 to rotate forward, so as to drive the force applying nut 1 and the propeller shaft of the ship to rotate through the transmission shaft 11, thereby realizing the tightening of the propeller shaft of the ship. When the propeller shaft of the ship needs to be disassembled, the hydraulic wrench is started to drive the driving shaft 2 to rotate reversely.

[0028] For those skilled in the art, various corresponding changes and modifications can be given according to the above technical solutions and concepts, and all these changes and modifications should be included in the protection scope of the utility model claim.

Claims

1. A heavy duty rotary power- tightening device, characterized in that, It comprises a force applying nut (1) and a rotary driving mechanism; the top of the force applying nut (1) is coaxially connected with a transmission shaft (11); the rotary driving mechanism comprises a driving shaft (2) and a power mechanism (3), the power mechanism (3) and the driving shaft (2) are drivingly connected and can drive the driving shaft (2) to rotate; the driving shaft (2) and the transmission shaft (11) are coaxially drivingly connected.

2. The heavy-duty rotary power twist-on fastener of claim 1 wherein, The transmission shaft (11) is prismatic, the inner ring of the driving shaft (2) is prismatic and matches the transmission shaft (11) in shape and size, and the inner ring of the driving shaft (2) is sleeved on the outside of the transmission shaft (11).

3. The heavy-duty rotary power twist-on fastener of claim 1 wherein, The top of the force applying nut (1) is connected with a cross connecting frame (12), and the transmission shaft (11) is arranged on the top of the cross connecting frame (12).

4. The heavy-duty rotary power- assisted twist-on connector of Claim 1, wherein, The power mechanism (3) is a hydraulic wrench.

5. The heavy-duty rotary power- assisted twist-on connector of Claim 1, wherein, It also comprises a hoisting frame, and the force applying nut (1) is rotatably arranged on the hoisting frame.

6. The heavy-duty rotary power- tightening device of claim 5, wherein, The hoisting frame comprises a lower annular fixing frame (4) and an upper gantry (5), the top of the gantry (5) is provided with a hoisting hole (6), the bottom of the annular fixing frame (4) is provided with a supporting bottom plate (41), the middle part of the supporting bottom plate (41) is provided with an opening (42), the inner diameter of the opening (42) is greater than the inner diameter of the force applying nut (1) and smaller than the outer diameter of the force applying nut (1).

7. The heavy-duty rotary power twist-on fastener of claim 6 wherein, The two sides of the gantry (5) are detachably connected with the two sides of the annular fixing frame (4) through bolts.

8. The heavy-duty rotary power twist fastener according to claim 6, wherein The bottom outer edges of the annular fixing frame (4) are uniformly provided with a plurality of supporting legs (43).

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