JPH056220U - Support structure of rotating shaft - Google Patents

Abstract

(57) [Abstract] [Purpose] The object is to provide a support structure for a rotating shaft that does not transmit vibrations from the rotating shaft to a cover or the like. [Structure] A bearing housing 3 is mounted in a cover hole 4a formed in a cover 4 or the like, and a support structure for supporting a rotating shaft 1 via a rolling bearing 2 inside the bearing housing 3 is provided. A groove 6 is formed on either the surface or the outer peripheral surface of the bearing housing 3, and an O-ring 7 or an elastic ring 8 is provided in the groove 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a support structure for a rotary shaft.

[0002]

[Prior art and its problems]

 Conventionally, in a rotating shaft support structure in which a bearing housing is provided in a hole formed in a cover or the like, and the rotating shaft is supported inside the bearing housing by a rolling bearing, vibration of the rotating shaft causes the rolling bearing to move from the bearing housing to the bearing housing. There is a problem that it is transmitted to the cover through the cover and is amplified to generate noise, and if there is a slight gap between the hole of the cover and the bearing housing, the bearing housing may jump and wear the hole of the cover. However, there is a problem that the cover is vibrated to further increase the noise.

[0003]

[Means for Solving the Problems]

 The present invention was devised in view of the above-mentioned conventional problems, and an object thereof is to provide a support structure for a rotating shaft in which vibration is not transmitted to a cover or the like and noise is not generated. In a support structure of a rotary shaft, in which a bearing housing is mounted in the formed cover hole and a rotary shaft is supported inside the bearing housing via a rolling bearing, either the inner peripheral surface of the cover hole or the outer peripheral surface of the bearing housing is provided. That is, a groove is formed on one side and an elastic ring is interposed in the groove.

[0004]

[Action]

 Since the elastic ring is installed in the groove formed on either the inner peripheral surface of the cover hole or the outer peripheral surface of the bearing housing, the vibration from the rotating shaft is absorbed by this elastic ring and the vibration is absorbed. Noise is not transmitted to the cover and the noise from the cover is reduced.

[0005]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional configuration diagram of a main part of a rotating shaft support structure. A rolling bearing 2 is provided on the outer circumference of an end portion of the rotating shaft 1. The rolling bearing 2 has a snap ring 5 and a bearing housing 3 The bearing housing 3 is mounted inside, and the bearing housing 3 is mounted in a cover hole 4 a formed in the cover 4.

In this example, two grooves 6 and 6 are formed on the outer peripheral surface of the bearing housing 3, and O-rings 7 and 7 are mounted in the grooves 6 and 6, respectively. FIG. 2 is a cross-sectional view of a main part of the mounted state. If the O-rings 7, 7 are mounted in the grooves 6, 6 on the outer circumference of the bearing housing 3 and the bearing housing 3 is mounted in the cover hole 4a, the vibration transmitted from the rotary shaft 1 is Vibration is not transmitted to the cover 4 by being absorbed by the O-rings 7, 7, and noise from the cover 4 is reduced.

Next, FIG. 3 shows a second embodiment. In this embodiment, two grooves 6 and 6 are formed on the inner peripheral surface of the cover hole 4 a of the cover 4, and the grooves 6 and 6 are formed in the respective grooves 6 and 6. The O-rings 7 and 7 are attached respectively, and FIG. 4 shows a cross section of the main part of the attached state. Also in this example, since the vibrations from the rotary shaft 1 are well absorbed by the O-rings 7, 7, the cover 4 does not vibrate, and the noise is reduced.

Further, FIG. 5 shows a third embodiment. In this embodiment, a wide groove 6 is formed on the outer periphery of the bearing housing 3, and an elastic ring 8 having a rectangular cross section is mounted in the groove 6. Therefore, the elastic ring 8 absorbs the vibration.

Further, in the fourth embodiment of FIG. 6, a wide groove 6 is formed on the inner peripheral surface of the cover hole 4a of the cover 4, and an elastic ring 8 having a rectangular cross section is attached to the groove 6. The elastic ring 8 can absorb the vibration and reduce the noise of the cover 4.

[0010]

EFFECTS OF THE INVENTION The present invention provides a rotating shaft support structure in which a bearing housing is mounted in a cover hole formed in a cover or the like, and a rotating shaft is supported through a rolling bearing inside the bearing housing. By forming a groove on either the inner peripheral surface or the outer peripheral surface of the bearing housing and inserting an elastic ring in the groove, the vibration transmitted from the rotating shaft is well absorbed by the elastic ring. Noise that is not transmitted to the cover side and that is emitted from the cover is reduced. Further, the elastic ring prevents the bearing housing from jumping in the cover hole, and has the effect of preventing wear of the cover hole.

[Brief description of drawings]

FIG. 1 is a cross-sectional configuration diagram of essential parts showing a first embodiment of a support structure for a rotating shaft.

FIG. 2 is a cross-sectional configuration diagram of essential parts in a state where an O-ring is attached to the outer periphery of the bearing housing.

FIG. 3 is a cross-sectional configuration diagram of a main part of a support structure for a rotating shaft according to a second embodiment.

FIG. 4 is a cross-sectional configuration diagram of essential parts in a state where an O-ring is attached to the inner peripheral surface of the cover hole.

FIG. 5 is a main part exploded cross-sectional configuration diagram showing a third embodiment, in which an elastic ring is attached to the outer periphery of the bearing housing.

FIG. 6 is an exploded cross-sectional configuration diagram of essential parts in a state where an elastic ring is attached to the inner peripheral surface of the cover hole according to the fourth embodiment.

[Explanation of symbols]

 1 rotating shaft 2 rolling bearing 3 bearing housing 4 cover 4a cover hole 6 groove 7 O-ring 8 elastic ring

Claims (1)

[Claims for utility model registration] 1. A support structure for a rotary shaft, wherein a bearing housing is mounted in a cover hole formed in a cover or the like, and the rotary shaft is supported inside the bearing housing via a rolling bearing.
A support structure for a rotating shaft, characterized in that a groove is formed on one of an inner peripheral surface of the cover hole and an outer peripheral surface of the bearing housing, and an elastic ring is interposed in the groove.