JPS6120351Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an eccentric device that converts rotational motion into reciprocating motion.

Conventionally, an eccentric device as described above includes an eccentric inner ring and an eccentric outer ring, and an eccentric rod is connected to the eccentric outer ring. It is necessary to lubricate the relative rotating surfaces of the eccentric inner ring and the eccentric outer ring, but since the lubrication method uses artificial lubrication, forgetting to lubricate can cause
The above-mentioned surface of relative rotation may become stuck. Furthermore, when the relative rotational surface wears out, a gap is created between the eccentric inner ring and the eccentric outer ring at the opposite part of the eccentric inner ring from the pressing part of the eccentric outer ring, so that foreign matter such as dust can enter this gap. This foreign material may also cause the surface of relative rotation to become baked. Furthermore, even if lubricating oil is supplied to the relative rotating surfaces, the lubricating oil may scatter, reducing the lubrication effect.

Therefore, this invention automatically lubricates the relative rotating surfaces between the eccentric inner ring and the eccentric outer ring, and prevents lubricating oil from scattering from the relative rotating surfaces and foreign matter from entering the relative rotating surfaces. The purpose is to provide equipment.

Hereinafter, embodiments of this invention will be described based on the drawings. In FIG. 1, reference numeral 10 is a motor provided on a base 11, and a drive gear 1 is attached to a motor shaft 12.
3 is fixed. 14 is a driven gear, and base 1
It is supported by a fixed shaft 15 provided at 1 and meshes with the drive gear 13. Reference numeral 16 denotes an eccentric device, which is composed of an eccentric inner ring 17 integrally formed with the driven gear 14 and an eccentric outer ring 19 integrally formed with an eccentric rod 18, as shown in FIG. The driven gear 14 and the eccentric inner ring 17 are made of a sintered alloy containing lubricating oil, and the surface of the driven gear 14 is coated with a plating layer (not shown). A diaphragm pump 20 is suspended from the base 11, and the tip of the eccentric rod 18 is connected to the diaphragm 21 of the pump 20. 22 is a washer fixed to the tip of the fixed shaft 15 by a stopper 23. This washer 22 prevents the eccentric outer ring 19 from coming off from the eccentric inner ring 17, and as shown in FIG. At a portion 25 opposite to the pressing portion 24 against the eccentric outer ring 19, the outer ends of the eccentric inner ring 17 and the eccentric outer ring 19 are closed.

In the above configuration, when the motor shaft 12 rotates, the center of the eccentric inner ring 17 rotates around the center of the fixed shaft 15, and the tip of the eccentric rod 18, that is, the diaphragm 21, reciprocates in the direction of the arrow 26. At this time, the lubricating oil contained inside the eccentric inner ring 17 oozes out onto the relative rotating shaft 27 between the eccentric inner ring 17 and the eccentric outer ring 19 due to centrifugal force, and this relative rotating surface 2
7 is automatically lubricated. When the relative rotation surface 27 becomes worn, a gap is generated between the eccentric inner ring 17 and the eccentric outer ring 19 at the pressing part 24 of the eccentric inner ring 17 against the eccentric outer ring 19 and the opposite part 25.
Oil will collect in that gap. On the other hand, in the opposite part 25, the space between the outer ends of the eccentric inner ring 17 and the eccentric outer ring 19 is closed by the washer 22, so that the lubricating oil oozing from the eccentric inner ring 17 leaks from the gap. Never.
In other words, the gap serves as an oil reservoir and promotes the lubricating effect of the relative rotation surface 27. Further, the washer 22 prevents foreign matter such as dust from entering the gap.

By the way, since the surface of the driven gear 14 is coated with a plating layer (not shown), the lubricating oil contained in the driven gear 14 is not released from the tooth portion 28. In other words, the lubricating oil in the driven gear 14 is not released. The oil flows to the eccentric inner ring 17 and is effectively used to lubricate the relative rotating surface 27.

Incidentally, as shown in FIG. 4, the eccentric inner ring 17 can be provided directly on the motor shaft 12.

As described above, according to this invention, the relative rotating surfaces between the eccentric inner ring and the eccentric outer ring are automatically lubricated, and the lubricating oil is prevented from scattering from the relative rotating surfaces and foreign matter from entering the relative rotating surfaces. It is possible to provide an eccentric device that can prevent this.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an example in which the eccentric device according to the invention is used as a power transmission means from a motor to a pump, Fig. 2 is a sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a sectional view taken along the line 2-2 of Fig. 1. FIG. 4, which is an explanatory diagram of the operation of the eccentric device, is a partially cutaway side view showing another example of mounting the eccentric device. 17... Eccentric inner ring, 19... Eccentric outer ring, 22...
...Watushi, 24...Pressed part, 25...Opposite part.

Claims (1)

[Scope of utility model registration request] The eccentric inner ring 17 is formed of a sintered alloy containing lubricating oil, and the eccentric inner ring 17 is connected between the outer ends of the eccentric inner ring 17 and the eccentric outer ring 19 at a portion 25 opposite to the pressing portion 24 of the eccentric inner ring 17 against the eccentric outer ring 19. Washers 2 that prevent outer ring 19 from coming off from eccentric inner ring 17
Eccentric device closed by 2.