JPS6131217Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a flange-type shaft coupling that connects a driving machine such as an engine to a driven machine such as a water pump or a generator.

An example of a conventional shaft joint of this type is shown in Figures 1 to 3.
As shown in the figure.

In the figure, 31 is a drive shaft connected to a driving machine such as an engine (not shown), 32 is a drive side flange fixed to the drive shaft 31, 36 is a driven shaft connected to a driven machine such as a water pump (not shown), 35
is a flange fixed to the driven shaft 36, and the flanges 32 and 35 are fixed by bolts 34 and nuts 37, and transmit power from the drive shaft 31 to the driven shaft 36. Reference numeral 33 denotes a V-belt installed in a V-shaped groove provided in the drive-side flange 32, and drives engine accessories (not shown) via the V-belt 33.

In such a shaft coupling, since the flanges 32 and 35 are circular as shown in FIG.
When replacing the belt 33, remove the bolt 3.
4. After removing the nuts 37, etc., move either the driving machine or the driven machine in the axial direction, or remove the spacer inserted between both flanges 32 and 35, and connect the driving side flange 32 and the driven side flange 35.
It was necessary to provide a gap L between them, as shown in FIG. 3, through which the V-belt 33 could pass.

For this reason, replacing the V-belt 33 required a great deal of effort and time. The present invention has been made in view of the above, and an object of the present invention is to provide a shaft joint that is formed so that winding of a V-belt or the like and transmission members can be easily and quickly replaced.

Therefore, in the present invention, the driving side flange and the driven side flange of the shaft coupling are notched so as to form a plurality of crotches with the peripheral edge joints located at the tips. It is characterized by forming a gap through which the member can pass.

1 of the present invention with reference to FIGS. 4 to 6 below.
An example will be explained.

Figure 4 shows an example of driving a water pump with an engine. In the figure, 1 is the crankshaft of the engine, 2 is the impeller shaft of the water pump, and 3 is fixed to the end of the crankshaft with a bolt 5. bowl-shaped flange on the drive side (hereinafter referred to as the drive side flange), 4
is a driven side bowl-shaped flange (hereinafter referred to as driven side flange) fixed to the end of the impeller shaft 2 via a key 6 and a nut 7. The driving side flange 3 and the driven side flange 4 are connected to each other by tightening their circumferential joints with bolts 9.
Further, a V-shaped groove 3A is formed in the drive side flange 3, and a V-belt 8 is mounted within the groove 3a. This V-belt 8 is connected to and drives an engine auxiliary device (not shown).

As shown in FIG. 6, the flanges 3 and 4 are formed into bifurcated shapes by cutting out the circular flanges so that the peripheral joint portion is located at the tip. That is, when the bolts 9 are removed and the flanges 3 and 4 are rotated relative to each other without moving them in the axial direction as shown in FIG. 5 with the engine and water pump still installed on the pedestal, A notch is formed between the flanges 3 and 4 to form a space 10 through which the V-belt 8 can pass.

Note that the flanges 3 and 4 do not necessarily have to be cut out in a bifurcated manner as shown in FIGS. 4 to 6, and when these are relatively rotated without being moved in the axial direction as described above, the V belt The notch may be cut into a three-pronged or four-pronged shape so as to form a space 10 through which the number 8 can pass.

When replacing the V-belt in a shaft joint with the above configuration, remove the bolt 9 with the engine and water pump installed on the pedestal, and rotate the flanges 3 and 4 relative to each other by 90 degrees as shown in Figure 5. . At this time, a space 10 is created between the flanges 3 and 4, so the V-belt 8 is removed from the V-shaped groove 3a and the space 10 is created.
Take it out through.

That is, the V-belt 8 can be replaced without moving both the engine and the water pump in their axial directions. Also, if you remove the bolt 5 and pull out the flange 3, you can see the engine's oil seal 11 and sleeve 1.
4 can be replaced, and the water pump's oil seal 12, bearing 13, etc. can also be replaced by loosening the nut 7, removing the flange 4, and pulling out the key 6. In this way, consumable parts such as oil seals and bearings can be replaced while the engine and water pump remain installed.

As described above, in the present invention, the bowl-shaped flange on the driving side and the bowl-shaped flange on the driven side are notched so that the peripheral joints of each are located at the tips, and the driving shaft and the driven shaft are connected in the axial direction. When the flanges are uncoupled and rotated relative to each other without being moved, a gap is formed between the flanges through which a wrapped transmission member such as a V-belt can pass.
It becomes possible to replace the wrapped transmission member such as the V-belt without moving both the driving machine and the driven machine in their axial directions and without removing the spacer as in the conventional case. Further, there is no need for centering work after replacement.

That is, the V-belt and the like can be replaced extremely easily and in a short time.

Further, since both flanges can be removed in the above-mentioned installed state, oil seals, bearings, etc. of the driving machine and the driven machine can be easily replaced. In addition, in such a shaft coupling, the frictional resistance force generated on the mating surfaces of the flanges 3 and 4 due to the tightening force of the bolt 9 on the outer peripheral side is usually sufficiently larger than the tangential force acting on the bolt tightening part due to the transmitted torque. The bolts 9 are constructed so as not to cause slippage on the mating surfaces, and even if slippage occurs, the bolts 9 are constructed to break due to shear stress. However, the strength against shear stress along the circumferential direction is sufficient. Therefore, the above-mentioned advantages in assembly and disassembly can be obtained while maintaining sufficient strength in the flange.

[Brief explanation of the drawing]

Figures 1 to 3 show an example of a conventional flange type shaft joint, with Figure 1 being a partial sectional view along the axial center line, and Figure 2 being a sectional view taken along line BB in Figure 1. , FIG. 3 is an explanatory diagram showing how to replace the V-belt.
4 to 6 show one embodiment of the present invention,
Fig. 4 is a sectional view taken along the axial center line, Fig. 5 is an explanatory diagram showing how to replace the V-belt, and Fig. 6 is A--A in Fig. 4.
It is a sectional view along the A line. 1... Crankshaft, 2... Impeller shaft, 3...
... Bowl-shaped flange on the driving side, 4... Bowl-shaped flange on the driven side, 8... V-belt, 10... Space for passing the V-belt.

Claims (1)

[Scope of utility model registration request] A bowl-shaped flange fixed to the end of the drive shaft supported by the bearing and bent in the axial direction, and a bowl-shaped flange fixed to the end of the driven shaft supported by the bearing and bent in the axial direction, are connected at their peripheral joints. The bowl-shaped flange on the driving side and the driven side are connected to each other by joining, and a winding transmission member such as a belt for driving another driven machine is installed on the bowl-shaped flange. A state in which the bowl-shaped flange is cut out so that each peripheral joint part is located at the tip and has a plurality of crotches having a constant width from the axis, and the driving shaft, driven shaft, and bowl-shaped flange are not moved in the axial direction. When the fastening member connecting the two bowl-shaped flanges is removed and the bowl-shaped flanges are rotated relative to each other, a gap is formed between the bowl-shaped flanges through which the wrapped transmission member can pass. shaft coupling.