JP2001139265A - Shaft cover for equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a dimension L between a motor 4 and a disk brake 8 while avoiding an interference of a coupling 3 with a cover 20 when connecting an input shaft of an elevator speed reducer 1 to the output shaft 5 of the motor 4 through the coupling 3 and prevent the oil leaked from a clearance between the input shaft 2 and an oil seal 14 from being spattered, at a step part 15, in radial outer direction of the input shaft 2 by a centrifugal force. SOLUTION: This cover 20 formed so that a step part 15 comes into a recessed part 21 provided in the cover 20. Thus, a dimension L is shortened, and the oil spattered from the step part is received by a peripheral wall part 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a cover provided between a shaft and a device body in a device having a shaft extending from the inside of the device to the outside, such as a speed reducer of an elevator. .

[0002]

2. Description of the Related Art An example of a conventional cover for such a device will be described with reference to FIGS. FIG. 2 is a schematic plan view of the elevator hoisting machine. Reference numeral 1 denotes an elevator speed reducer. The input shaft 2 is connected to an output shaft 5 of a motor 4 by a coupling 3, and the output shaft 6 is connected to a traction sheave 7. It is connected to. 8 is a disc brake. FIG. 3 is FIG.
10 is a partial cross-sectional view of the vicinity of the input shaft, wherein 10 is a gear provided on the input shaft 2, 11 is a bearing disposed between the frame 12 of the reduction gear 1 and the input shaft 2, 13 is a cover of the bearing 11, and 14 is The oil seal 15 is a stepped portion between the input shaft 2 and the coupling 3.

[0003]

In this structure, in order to avoid interference between the coupling 3 and the cover 13, a stepped portion 1 is provided.
5 and the cover 13 must have a sufficient space. Therefore, the dimension L from the motor 4 to the disc brake 8
And the size of the entire elevator hoist becomes large. Also, the input shaft 2 and the oil seal 14
If the oil leaks from between the steps, when the leaked oil reaches the stepped portion 15, there is also a problem that the oil scatters outward in the radial direction of the input shaft 2 due to centrifugal force (FIG. 3A).

[0004]

According to the present invention, the shape of the cover is changed so that the cover surrounds the periphery of the stepped portion. As a result, the length L from the motor to the disc brake is reduced, and the oil that tends to scatter from the stepped portion is received by the cover, thereby preventing the oil from scattering.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. 1. A cover 20 according to the present embodiment has a concave portion 21 which is largely recessed on the side facing the stepped portion 15, and a substantially cylindrical shape around the concave portion. Is formed. Then, by inserting the stepped portion 15 into the concave portion 21, the peripheral wall portion 2 is formed.
2 surrounds the periphery of the stepped portion 15. FIG.
The same reference numerals denote the same components.

As described above, the present embodiment employs the stepped portion 15
Is inserted into the concave portion 21 of the cover 20, the dimension L from the motor 4 to the disc brake 8 can be reduced, and the overall dimension of the elevator hoisting machine can be reduced.
Further, since the peripheral wall portion 22 of the cover 20 receives the splash of oil from the stepped portion 15, the input shaft 2 and the oil seal 14
Even if there is an oil leak from between the above, oil scattering can be prevented.

In the above embodiment, the peripheral wall portion 22 is provided over the entire periphery of the stepped portion 15.
If the lower end of 2 is notched, the received oil can be dropped from this notch and collected in one place.
The stepped portion 15 is thinner on the side of the speed reducer 1 and thicker on the side of the motor 4, but the same can be applied to the opposite case.

Further, in the above embodiment, the case of the input shaft 2 of the speed reducer 1 of the elevator hoist has been described as an example. However, the present invention is not limited to this, and is generally extended from inside to outside of the equipment. The present invention can be applied to a case where a cover is provided on a shaft having a portion having a different thickness such as a stepped portion at a portion outside the device. Further, as shown in FIG. 1, this stepped portion may be a stepped portion formed by a shaft and another component (for example, a coupling), and the thickness of the shaft itself is changed. It may be a stepped portion caused by the above.

[0009]

As described above, according to the present invention,
The size of the whole device can be reduced, and even if there is an oil leak, scattering of oil can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a schematic plan view of the elevator hoist.

FIG. 3 is a sectional view of a main part of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reduction gear 2 Reduction gear input shaft 3 Coupling 4 Motor 12 Reduction gear frame 13 and 20 Cover 14 Oil seal 15 Stepped portion 21 Depression 22 Peripheral wall

Claims (3)

[Claims] 1. A shaft extending from the inside of the device to the outside and having a stepped portion at a portion protruding from the device, and a cover provided between the shaft and a body of the device, The cover of the shaft part of the device, wherein the cover has a shape surrounding the stepped portion. 2. An input shaft of an elevator speed reducer and an output shaft of a motor are coupled by a coupling, and a stepped portion is provided at a portion of the input shaft extending outside of the speed reducer. A cover provided between the frame and the machine body, wherein a concave portion is formed on the stepped portion side of the cover,
A cover for a shaft portion of a device, wherein the stepped portion is inserted into the recess. 3. The shaft cover of an apparatus according to claim 1, wherein the stepped portion is formed by the shaft and an article attached to the shaft.