JPH087809Y2 - Grease leak prevention cover for the reducer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a speed reducer using a grease bath lubrication method in a geared motor used as a power source for a carrier machine, a processing machine, or the like.

2. Description of the Related Art In recent years, a grease bath lubrication system has been widely used in geared motor reducers because they can be installed in any direction and can be easily maintained.

Hereinafter, an example of grease used in a conventional geared motor reducer will be described.

FIG. 3 is a sectional view of the speed reducer, and the gear speed reduction mechanism is composed of 1 gear, 2 pinions, 3 shafts, and 4 bearings.

Reference numeral 5 is a gear case that houses the gear reduction mechanism, and 6 is a casing that fixes the gear reduction mechanism and is attached to the gear case 5.

In the gear reduction mechanism, grease is applied to the tooth surfaces of the gear 1 and the pinion 2. This grease has a consistency of 265-295
It is a semi-solid lubricant that does not flow easily, and its amount is small enough to cover the tooth surface of each gear.

 The utility value of this grease will be described below.

In recent years, due to diversification of equipment, an integrated geared motor cannot cope with an increase in the combination of motors having different functions and reduction gears having different reduction ratios. Therefore, for the purpose of improving the efficiency of product management and expanding the freedom of model selection, the separated geared motor is often used, which has a structure in which the motor and reducer are stored separately and can be easily combined when used. .

When the above-mentioned grease was used in the reduction gear of the separation type geared motor, it did not flow out of the reduction gear when the reduction gear alone was stored or when the product was transported.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional grease, when the grease on the tooth surface escapes to the outside of the tooth surface due to the meshing of gears, the grease is not circulated and the effect as a lubricant is impaired.

For this reason, the speed reducer of the conventional separation type geared motor is
It had the shortcomings of long wear due to the severe wear of the tooth surface and the large noise caused by the meshing of the gears. Use the grease bath lubrication method to fill the gear case with. When this method is used, the gear is always immersed in grease, so that the lubricity is high, and therefore the life is extended and the noise is reduced.

However, in the separated type geared motor, since the reducer before combination with the motor is stored as a single unit, the grease bath lubrication method has a problem that grease leaks. Therefore, the grease bath lubrication method is used. Separate geared motors have never been on the market.

The present invention solves the above-mentioned conventional problems and provides a grease leakage prevention cover for a speed reducer that can store a speed reducer using a grease bath lubrication method as a single unit.

Means for Solving the Problems In order to achieve this object, the grease leakage prevention cover of the speed reducer of the present invention has a cylindrical protrusion that fits into the motor output shaft insertion hole of the speed reducer and a reducer It is a lid body having an annular protrusion that fits into the mounting portion, and is provided with an inclined portion around it, and is formed of an elastic body such as plastic.

Action With this configuration, the opening at the joint of the reduction gear with the motor can be closed, and grease leakage can be prevented.

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

FIG. 1 is a perspective view of a grease leakage prevention cover of the speed reducer of the present invention. In FIG. 1, reference numeral 7 is a cylindrical projection that fits into the reduction gear motor output shaft insertion hole, and 8 is an annular projection that fits into the reduction gear mounting portion. Reference numeral 9 denotes an inclined portion provided on the outer periphery of the lid having the cylindrical protrusion 7 and the annular protrusion 8, and 10 denotes a handle portion provided on a part of the inclined portion 9.

The cylindrical projection 7 has a reduction gear motor output shaft insertion hole and a tightening margin, and in this embodiment, the tightening margin is about 0.1 at the hole diameters φ6 to φ10. To prevent the tip from coming off,
It has a hook-shaped protrusion on the outer circumference.

The ring-shaped protrusion 8 is reversely tapered so as to be crimped to the mounting portion of the speed reducer.

The inclined portion 9 is provided along the outer shape of the reduction gear, and has an inclination of 60 ° with respect to the mounting surface of the reduction gear with the motor. Handle part 10
Is a handle portion extending to a length such that a part of the inclined portion 9 can be grasped with a finger, and has a washing plate-shaped unevenness as a slip stopper.

FIG. 2 is a cross-sectional view showing a state where the grease leakage prevention cover of the speed reducer is attached to the speed reducer.

The structure of the speed reducer in this embodiment is the same as that of the conventional speed reducer shown in FIG.

On the mounting surface of the speed reducer to the motor, the grease leakage portion is the motor output shaft insertion hole 11 in the central portion of the casing and the gap portion 12 between the gear case and the casing. The cylindrical protrusion 7 located at the center of the lid is fitted into the motor output shaft insertion hole 11, and both have a tight margin so that the hole 11 is closed. In addition, since the bulge at the tip is a hook type, it can be inserted easily and can be prevented from coming off.

Since the annular projection 8 is fitted to the mounting portion of the speed reducer and has an inverse taper shape, the two are in close contact with each other at the tip portion and prevent grease leakage.

The inclined portion 9 functions as a grease tray when the mounting surface of the reduction gear with the motor is placed downward, and does not leak the grease to the outside.

The handle portion 10 is for grasping with a finger when the speed reducer is used and for easily removing the grease leakage prevention cover of the speed reducer.

According to this embodiment, the reduction gear of the separation type geared motor,
It became possible to use a grease leakage prevention cover with softer grease having a consistency of 400 to 430 degrees, and the noise level could be reduced by 10 to 15 dB compared to the conventional one.

In this embodiment, the annular protrusion has an inverse tapered shape, but a ring-shaped protrusion may be provided on the outer circumference of the annular protrusion.

Effect of the Invention As described above, the present invention has a cylindrical protrusion that fits into the motor output shaft insertion hole of the speed reducer and an annular protrusion that fits into the mounting part of the speed reducer and is removable. With a nice lid,
Since the structure has an inclined part around it, the grease reducer for the separated type geared motor that uses the grease bath lubrication method is stored as a single unit from the time the product is packaged until just before being combined with the motor during use, preventing grease leakage. In addition, it provides a grease leakage prevention cover for reduction gears, which is indispensable for realizing a low-noise, long-life separated geared motor.

[Brief description of drawings]

FIG. 1 is a perspective view of a grease leakage prevention cover of a speed reducer according to an embodiment of the present invention, FIG. 2 is a sectional view of the grease leakage prevention cover of FIG.
The figure is a cross-sectional view of a conventional speed reducer. 7 ... Cylindrical protrusion, 8 ... Annular protrusion, 9 ... Inclined portion, 10 ... Handle, 11 ... Motor output shaft insertion hole.

Claims (1)

[Scope of utility model registration request] 1. A reducer using a grease bath lubrication system that is stored separately from a motor, is fitted with a tightening allowance in a hole for inserting the output shaft of the reducer motor, and has a hook-shaped protrusion on the outer periphery at the tip. An elastic resin plate-shaped lid having a cylindrical protrusion having an annular protrusion and an outer periphery having an inversely tapered protrusion that is crimped to the mounting portion of the speed reducer, and the outer periphery of the lid. Is a removable grease reducer cover that has a sloped part that has an outward slope to cover the mounting surface of the reducer.