JPS5821934Y2 - Motor coupling device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a motor coupling device for coupling a load shaft to which a load such as a fan is attached to an output shaft of a motor.

Generally, when connecting a load shaft with a fan or turntable, etc. attached to the output shaft of a motor in household electrical equipment such as refrigerators and microwave ovens, a protrusion is provided on one shaft, and a protrusion is provided on the other shaft. A method is adopted in which the shaft is provided with a groove that fits into the protrusion, and the two are connected through engagement between the protrusion and the groove.

For example, as shown in FIG. 1, a pin 2 is inserted into a hole 3 drilled in the output shaft 1 of the motor, and a groove 5 that engages with the protruding portions at both ends of the bottle 20 is inserted into the load shaft 4 into which the output shaft 1 is fitted. There is one in which the output shaft 1 and the load shaft 4 are connected by engagement between the pin 2 and the groove 5.

In this case, the pin 2 as a connecting member is thin and easily bent, and if the pin 2 is bent, it will be difficult to insert into the hole 3 of the output shaft 1, and the pin 2 will be bent when attached to the output shaft 1. and engages with the groove 5 of the load shaft 4, making assembly work difficult.

Therefore, as shown in FIG. 2, a groove 6 is milled in the output shaft 1, and a detent plate I having both ends protruding from both sides of the output shaft 1 is fitted into this groove 6. The output shaft 1
It is conceivable to fix the load shaft 4 with a pin 8 and engage the rotation prevention plate 7 with the groove 5 of the load shaft 4.

However, in this case, the groove 6 must be formed in the output shaft 1 by milling, which is not very efficient and cost-effective.

The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a motor coupling device with improved manufacturability and assembly workability.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a schematic diagram showing a geared motor device.

In this device, the rotation of the motor 11 is controlled by the motor shaft 12.
The signal is then transmitted to the output shaft 16 of the geared motor via a speed reduction mechanism 15 made up of gears 13 and 14.

This output shaft 16 is connected to the outer case 17 of the speed reduction mechanism 15.
It is rotatably supported between bearing portions 18 and 19 formed by burring or the like.

An oil retaining groove 20 for oil supply is formed by drawing on the outer peripheral surface of one of the bearing parts 18, and an oil retaining member 21 such as felt impregnated with lubricating oil is housed in this groove 20. A covering plate 22 made of a thin aluminum plate, a plastic sheet, a tin plate, etc. is provided to prevent lubricating oil from volatilizing.

The lubricating oil impregnated in the oil retaining member 21 is then transferred to the output shaft 1.
As a result of the temperature increase due to frictional heat between the bearing parts 18 and 19 due to 60 rotations, oil flows into the bearing part 18 from the oil retaining groove.

Further, the lower bearing part 19 has an output shaft 16 or a gear 1.
The lubricating oil flows down from the passage groove 23 formed in the bearing part 4 and performs a lubricating effect on both the bearing parts 18 and 19.

On the other hand, a connecting portion 24 is formed at the lower end of the output shaft 16.

As shown in FIG. 4, this connecting portion 24 has an engaging portion 25 formed of a dead weight or a protrusion on the circumferential surface of the output shaft 16, and two holes are formed in the engaging portion 25 of the protrusion. The connecting plate 28 of the connecting plate 28 is engaged.

This connecting plate 28 has a retaining portion 26 of a protrusion or hole that engages with the dead weight or protrusion retaining portion 25 in the curved portion 27 of the intermediate portion.
At the same time, anti-rotation pieces 29 are formed at both ends.

Then, the retaining portions 26 of the two connecting plates 28 are engaged with the engaging portions 25 of the holes or protrusions of the output shaft 16, and the two connecting plates 28 are connected on both sides via the curved portions 27. The output shafts 16 are opposed to each other so as to sandwich the output shafts 16 between them, and the anti-rotation pieces 29 at both ends are fixed to each other by suitable fixing means such as spot welding.

Then, the load shaft 33 is connected to this overlapping connection plate 28.

This load shaft 33 has a hole 30 in the center of the end face that fits into the outer diameter of the curved portion 27 of the connecting plate 28, and a locking groove 31 on both sides of the hole 30 in which the locking piece 29 engages. A matching groove 32 is formed.

Then, the connecting plate 28 is fitted into the engagement groove 32.

Therefore, the rotation from the output shaft 16 is prevented by each rotation stopper piece 29.
The load is reliably transmitted to the load shaft 33.

According to the present invention, an engaging portion of the dead weight or protrusion is formed around one of the output shaft and the load shaft of the motor, and the engaging portion of the hole or protrusion is formed in the intermediate portion. Two connecting plates each having a retaining portion for a protrusion or a hole and having anti-rotation pieces formed at both ends are engaged with each other around the one shaft, and the connecting plate is connected to the end surface of the other shaft. Because it fits into the engagement groove formed on the shaft, there is no need to mill a groove for inserting a rotation stopper plate into one shaft as in the conventional method, which improves productivity and reduces costs compared to the conventional method. The rotation of the two connecting plates for one shaft is restricted by engagement with the protrusion and the hole, and the other shaft for the two connecting plates fits into the engagement groove. Since the rotation is restricted by the mating anti-rotation piece, the rotation from the motor's output shaft can be reliably transmitted to the load-side shaft via the connecting plate, and the transmission may become uncertain due to changes over time. This is particularly suitable for driving high-load shafts.

[Brief explanation of the drawing]

Figures 1 and 2 are exploded perspective views showing conventional devices, Figure 3 is a partially cutaway side view showing an embodiment of the device of the present invention, and Figure 4 is an exploded view of its main parts. FIG. 11... Motor, 16, 33... Axis,
25...Dead weight or protrusion engagement part, 26...
・・Protrusion housing or hole engagement portion, 28 ・・・Connection plate,
29... Detent piece, 30... Hole, 3
2... Engagement groove.

Claims (1)

[Scope of utility model registration request] In a coupling device that connects the output shaft of a motor and a load shaft to which a load is attached to each other and transmits rotation from the motor to the load shaft, a dead weight or an engaging portion of a protrusion is provided on the circumferential surface of one of the shafts. One of the above-mentioned two connecting plates is formed, and has a protrusion cutout or hole engagement part that engages with the dead weight or protrusion engagement part in the middle part, and has detent pieces at both ends. engaging with each other around the shaft of the other shaft, and fixing the anti-rotation pieces of the two opposing connecting plates to each other, and the above-mentioned connecting plate is connected to the end face of the other shaft having a hole into which the one shaft is inserted. A motor coupling device characterized by having an engagement groove that fits into a plate.