JPS5833231Y2 - Shaft coupling in the connection between internal combustion engine and rotating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a shaft coupling used when a generator or other appropriate rotating device is coupled to an internal combustion engine, and is primarily aimed at shortening the axial dimension.

Conventionally, when connecting a generator etc. to an internal combustion engine,
A flexible joint is installed between a pair of flanges fixed to both shafts, and a damper, pulley, etc. is installed on the engine side, and the pulley is also used to turn the engine during centering work during installation. In some cases, an insertion hole for a turning rod is formed.

The configuration in this case will be explained with reference to FIG. 1. 1 is an engine, 2 is a crankshaft of the engine, and 3 is a key 4 at the end of the engine.
, a nut 5, etc., and a damper 6, a pulley 7, and a flexible joint mounting 7 flange 8 are integrally attached to the joint with bolts 9 while being centered at the spigots A and B. ing.

10 is an appropriate rotating device such as a generator, 11 is a shaft of the device,
A seven flange 12, which is paired with the seven flange 8, is fixed to the shaft, and a flexible joint 14 is attached by a bolt 13 between both the seven flange 8°12.

Here, on the circumferential surface of the pulley 7, turning rod insertion holes 7b are formed at several locations along with the V-groove 7a.

However, when aligning the engine 1 and the device 10, with the joint 3, damper 6, and pulley 7 attached to the engine side,
Alternatively, with the 7 langes 8 attached, a dial gauge is fixed to the pulley or the 7 langes, and the needle bar is applied to the peripheral surface or end surface of the 7 langes 1-2 on the device 10 side, and the dial gauge is attached to the pulley. The engine is turned by inserting a turning rod into the hole 7b, and the alignment of the axes of the engine and the device is observed by reading the deflection of the pointer of the dial gauge at that time.

However, in such a configuration, since the groove 7a and the turning rod insertion hole 7b are formed on the circumferential surface of the pulley, the axial dimension of the pulley becomes longer, making it difficult to install it in a place with limited space. Moreover, since the load acting on the end of the crankshaft increases, problems arise in terms of the strength of the shaft, main bearing, etc.

The present invention was developed in view of the above circumstances, and includes a pulley fixed to the end of the crankshaft via an appropriate joint, a flange for attaching a flexible joint, and a turning rod insertion hole in the pulley. In the configuration in which the insertion hole forming part of the pulley is made smaller in diameter than the groove forming part (1), it is housed in the hollow part of the flange, so that when a rotating device is connected to the internal combustion engine as appropriate. The axial dimension of the dovetail shaft joint is shortened to save installation space, reduce the weight of the pulley, reduce the load acting on the crankshaft and main bearing, and reduce material costs.

According to the embodiment shown in the figure below, in Fig. 2, 2
1 is an engine, 22 is a crankshaft of the engine, 23 is a joint fixed to its end with a key 24 and a nut 25;
A damper 26, a boo IJ-27, and a flange 28 for attaching a flexible joint are fixed to the joint by bolts 29.

However, although the pulley 27 is formed with a groove 27a and a turning rod insertion hole 27b, the insertion hole forming portion 27
' has a smaller diameter than the groove forming part 27'', and is housed in the hollow part 28a of the seven flange 28.

According to the above configuration, when performing centering work during installation, when the joint 23, damper 26, and pulley 27 are attached to the crankshaft 22, the dial gauge is fixed to the pulley and the needle bar is moved toward the device 30 side. At the same time, a turning rod is inserted into the hole 27b in the pulley to turn the engine.After that, when the axes of the engine 21 and the device 30 are aligned, the pulley 27 is connected to the seventh flange 28. In addition, a flexible joint 34 is installed between the seventh flange 28 and the seventh flange 32 on the device side.

However, in that case, the insertion hole forming portion 27' of the pulley 27 is housed in the hollow portion 28a of the 7 flange 28, so that a portion of the pulley overlaps the 7 lange inside and outside, and as a result, as shown in FIG. The shaft coupling between the engine 21 and the device 30 is shortened compared to the conventional configuration shown in FIG.

In the embodiment shown in FIG. 2, it is possible to use the conventional one shown in FIG. 1 as is for other parts by simply replacing the pulley.

As described above, when an appropriate rotating device such as a generator is coupled to an internal combustion engine, the shaft coupling of the present invention has seven flanges for attaching a flexible coupling fixed to the end of the crankshaft via a pulley, and a turning section is attached to the pulley. In the structure in which the rod insertion hole is formed, the insertion hole forming part of the pulley is made smaller in diameter than the groove forming part and housed in the hollow part of the seven langes, so the shaft joint between the engine and the device is shorter than before. This saves installation space and allows installation in narrow spaces, and the weight of the pulley is reduced, which reduces material costs and reduces the load acting on the crankshaft and main bearing. This has the effect of reducing these strength problems and solving them.

[Brief explanation of drawings]

FIG. 1 is a vertical side view showing the configuration of a conventional shaft coupling, and FIG. 2 is a vertical side view showing the configuration of the shaft coupling of the present invention. 22 is a crankshaft, 27 is a pulley, and 27' is an insertion hole forming part. , 27" is the groove forming part, 28 is the flexible joint mounting part 7
The lunge 28a is a hollow part.

Claims (1)

[Scope of utility model registration request] For attaching a flexible joint to the end of the crankshaft via a pulley 7
In the structure in which the lunge is fixed and the tanning rod insertion hole is formed in the pulley, the insertion hole forming part of the pulley has a smaller diameter than the groove forming part, and is housed in the hollow part of the flange. A shaft coupling at the joint between an internal combustion engine and a rotating device.