JPS6011297Y2 - Drilling and crushing rotating shaft - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an excavating and crushing rotating shaft used in a waterway excavation device.

When supporting an excavating and crushing rotary shaft with multiple excavating and crushing blades implanted on the outer peripheral surface of the rotary shaft in the middle part, if this rotary shaft is long, the outer diameter of this rotary shaft must be supported by a bearing. In this case, the outer diameter of the bearing device becomes large, which may get in the way during excavation, and there is also the problem that disassembling and assembling the rotating shaft for the bearing device is troublesome. Ta.

The present invention was developed in consideration of the above-mentioned issues, and is designed to support the middle part of a rotating shaft without the outer diameter of this supporting part becoming too large compared to the outer diameter of the shaft. Another object of the present invention is to provide an excavating and crushing rotating shaft that can be easily disassembled and assembled.

The configuration will be explained below based on the embodiment shown in the drawings.

In FIG. 1, 1 is a waterway excavation device used by being attached to a crawler vehicle 2, etc., 3 is a screw, and 4 is an excavation and crushing rotation shaft according to the present invention, on the outer periphery of which a plurality of excavation and crushing blades 5 are fixed. .

As shown in FIG. 2, this excavating and crushing rotating shaft 4 has one end connected to an input shaft 6, and a middle part connected to a support bracket 7.
I support it.

The excavation and crushing rotation shaft 4 is located at the first position of the support bracket 7.
It is divided into a rotating shaft 4a and a second rotating shaft 4b, and both rotating shafts 4a and 4b are connected by a bearing unit 12 fixed to a support bracket 7.

The bearing unit 12 includes a housing 13 fixed to the support bracket 7, a coupling shaft 8 supported by the housing 13 via the bearing 10 and having a smaller diameter than the rotating shaft, and spline-fitted to the coupling shaft 8. The fitting hole member 9 is connected with a nut, and a floating seal 11.11 is interposed between the connecting shaft 8, the fitting hole member 9, and the housing 13.

The other end of the first rotating shaft 4b, whose one end is connected to the input shaft 6 through the 7 flange, is connected to the connecting shaft 8 of the bearing unit 12, and the fitting hole member 9 of the bearing unit 12 is connected to the other end of the first rotating shaft 4b. One end of the two rotating shafts 4b is coupled.

In the above configuration, when the input shaft 6 rotates, the first
An excavating and crushing rotating shaft 4 consisting of a rotating shaft 4a and a second rotating shaft 4b is supported by a bearing 2 unit 12 and rotated integrally.

Further, this excavating and crushing rotating shaft 4 can be installed in the waterway excavation device by removing the second rotating shaft 4b from the bearing unit 12, and removing one end of the first rotating shaft 4a from the bearing unit 12 and the other end from the flange of the input shaft 6. It is removed from the main body side in a disassembled state.

To remove the first rotating shaft 4a from the input shaft 6 side,
As shown in FIG. 2, if the coupling flanges are intertwined with each other in the axial direction, either move the flange that is spline-fitted to the input shaft 6 in the axial direction, or move the first rotating shaft 4a in the axial direction. do.

When moving the first rotating shaft 4a in the axial direction, the attachment of the support bracket 7 to the main body is slightly loosened to provide some play in the axial direction.

Since the present invention is as described above, the outer diameter of the support part by the support bracket 7 can be supported without becoming too large with respect to the outer diameter of the excavation and crushing rotating shaft 4, and this support part can be supported without becoming an obstacle. disappears.

Further, according to the present invention, the second
Not only the rotating shaft 4b but also the first rotating shaft 4a located between the bearing unit 12 and the input shaft 6 can be easily removed, and the excavating and crushing rotating shaft can be easily disassembled and assembled.

[Brief explanation of the drawing]

FIG. 1 is a side view of a waterway excavation device to which the present invention is applied, and FIG. 2 is a sectional view of the main parts of the present invention. 4 is an excavation and crushing rotating shaft, 6 is an input shaft, 7 is a support bracket, 8 is a coupling shaft, 9 is a fitting hole member, 1o is a bearing, 11 is a floating seal, 12 is a bearing unit, and 13 is a housing.

Claims (1)

[Scope of utility model registration request] An excavating and crushing rotary shaft 4 is connected to an input shaft 6 at one end, supported by a support bracket 7 at the middle portion, and has a plurality of excavating and crushing blades 5 fixed to the outer periphery. The bearing 10 supported by the bearing 10, the coupling shaft 8 supported by the bearing 10, the fitting hole member 9 that engages and fits into the tip of the coupling shaft 8 in the rotational direction, and the housing, the coupling shaft 8, and the fitting hole member 9 that is fitted into the housing. A bearing unit 12 with floating seals 11 and 11 interposed between the members 9 is fixed, and one end of this bearing unit 12 constitutes a part of the excavation and crushing rotation shaft 4, and one end is connected to the input shaft 6. The other end of the first rotating shaft 4a connected via a flange is connected, and one end of the second rotating shaft 4b constituting the other part of the excavating and crushing rotating shaft 4 is connected to the other end of the bearing unit 12. An excavating and crushing rotary shaft characterized by: