JP2845749B2 - Screw shaft support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw shaft supporting device mounted between a plurality of screws mounted on an auger machine to maintain a predetermined positional relationship between the screws.

[0002]

2. Description of the Related Art Conventionally, in an auger machine 100 whose main part is shown in FIG. 7A, a so-called interference band 101 is provided as an interference member between screws. The auger machine 100 includes screws 102a, 102b, and 102c each including a kneading blade 106 and a moving blade 107.
Are mounted on the multi-axis device 103, and the kneading blades 106 and the moving blades 107 act properly to perform good boring so that the screws 102a, 102
The interference band 101 is provided in order to maintain b and 102c in a predetermined positional relationship.

FIG. 7A is a sectional view taken along the line XX of FIG.
FIG. 7B shows an enlarged view of the vicinity of the interference band 101 in FIG. 7A. As shown in the figure, the screws 102a, 102b and 102c are provided with a so-called metal 1 at a position where the interference band 101 is provided.
04 is annularly welded. The interference band 101 is also made of metal, and two half-pieces shaped to cover the metal 104 are fixed by bolts and nuts 105.

[0004]

However, during boring by the auger machine 100, the interference band 1
01 and the metal 104 are in friction with each other, and the generated metal powder stains the periphery. For example, if there is a parking lot near a bowling point, the situation is that the car is contaminated with metal powder and damages are claimed. Oil is sometimes injected into the contact portion to reduce friction so that metal powder is not generated. In this case, however, there is a new problem that the oil scatters and contaminates the surroundings. Further, the interference band 101 and the metal 1
The frictional noise with the 04 is loud, causing even a noise problem. Further, when the metal 104 becomes worn and becomes unusable, new screws 104 are attached to the screws 102a, 102b and 102c.
Must be welded, and the repair takes time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a screw mounted between screws so that metal powder or oil is not scattered during boring, noise does not occur, and repair is not troublesome. It is an object to provide a shaft support device.

[0006]

As a result of intensive studies, the present inventor has found that the use of bearings can effectively solve the problem caused by friction, and has completed the present invention.

That is, a first aspect of the present invention is a male joint having a female joint at one end connected to a male end of one screw shaft and connected to a female end of another screw shaft. At the other end, a bearing mechanism for rotatably supporting the shaft coupling about an axis, and a connector provided on the bearing mechanism and connected to a connector of another adjacent screw shaft support device. And a screw shaft support device.

[0008] The second invention relates to a screw shaft support device in which an oil seal is provided between the bearing mechanism section and the shaft coupling in the first invention to fill in grease.

A third invention relates to a screw shaft support device according to the first or second invention, wherein a dust seal is provided between the bearing mechanism and the shaft coupling.

[0010] A fourth invention relates to a screw shaft support device in which a plurality of the connection tools are provided in the first to third inventions.

A fifth invention relates to the screw shaft supporting device according to the first to fourth inventions, wherein the shaft coupling has a milk passage hole communicating with the milk passage hole of the screw shaft.

[0012]

According to the first aspect of the present invention, there is provided a screw shaft supporting device,
The male joint of one screw shaft is connected to the female joint of the shaft coupling, and the female joint of the other screw shaft is connected to the male joint of the shaft coupling, and they rotate integrally and coaxially. I do. The shaft joint rotates while being supported by the bearing mechanism. And by connecting the connector provided in the bearing mechanism to the connector of the bearing mechanism of the other screw shaft support device, a certain screw shaft and another screw shaft are maintained in a predetermined positional relationship, respectively. Rotate. In this way, the part where friction occurs due to the rotation of the screw is the contact part between the shaft coupling and the bearing mechanism, so there is almost no generation of metal powder due to metal wear due to the characteristics of the bearing, and almost no noise due to friction do not do. In addition, if a problem such as wear occurs in the contact portion between the shaft coupling and the bearing mechanism, the screw shaft support device itself may be replaced, and the trouble of repairing a metal in the prior art is not required. In addition, the use of bearings reduces the resistance to the screw shaft during rotation, thereby reducing the torsional stress applied to the screw shaft and reducing the torsion of the screw shaft. Excavation can be performed.

According to the second aspect of the present invention, since the oil seal is provided between the bearing mechanism and the shaft coupling and grease is sealed, the problem due to friction is further reduced. Further, since the grease is sealed, there is no problem that the grease is scattered as in the prior art shown in FIG.

According to the third aspect of the present invention, since the dust seal is provided between the bearing mechanism and the shaft coupling, fine particles such as sand enter the contact portion between the bearing mechanism and the shaft coupling during boring. Therefore, the generation of the problematic friction is reliably prevented.

According to the fourth aspect of the present invention, if a screw shaft supporting device provided with a plurality of connecting devices is used, the plurality of connecting devices are connected to the connecting devices of another screw shaft supporting device to thereby provide three or more screw shaft supporting devices. The device is connected and three or more screws are maintained in a predetermined positional relationship.

The screw shaft supporting device according to the fifth aspect of the present invention can communicate with the screw shaft and allow milk to pass therethrough, so that a so-called SMW-like construction (excavation is performed while mixing milk and site soil). Can be applied to auger machines.

[0017]

Next, a specific embodiment of the screw shaft supporting device according to the present invention will be described with reference to the drawings.

FIGS. 1 to 3 show an embodiment of a screw shaft supporting device according to the present invention. 1 is a plan view, FIG. 2 is a front view, and FIG. 3 is a cross-sectional view taken along line YY of FIG. The screw shaft support device 1 of the present embodiment includes a shaft coupling 2 and a bearing mechanism 5. The bearing mechanism 5 is provided with two connectors 7, 7 in a direction perpendicular to the axis of the shaft coupling 2. As shown in FIG. 1, the connecting member 7 has a convex portion 7a and a concave portion 7b, and a coupling hole 8 for coupling with a bolt and a nut. As shown in FIG. 4 which is a plan view, the screw shaft supporting device 1 is configured such that the convex portion 7a and the concave portion 7b of the connecting tool 7 are engaged with each other, are connected by the bolt and nut 13, and are connected side by side. FIG. 5 is a side view showing a state where the screws 15a, 15b, and 15c of the three-axis auger machine are connected side by side in this manner. As shown in FIG. 5, the screws 15a, 15b,
15c are kept at a constant distance from each other.

With reference to FIGS. 1 to 5, the screw shaft support device 1 of the present embodiment will be described in more detail. Shaft coupling 2
Is provided with a female joint 3 at one end (upper end) and a male joint 4 at the other end (lower end). Further, the shaft coupling 2 is provided with a milk passage hole 17 through which milk passes in a central portion. Female joint 3
The lower end of the male screw of the upper screw is fitted into it, and the tapered pin is driven into the tapered pin driving hole 9a. The tapered pin is engaged with a not-shown driving groove provided at the lower end of the male die. In the combined state, the female joint 3 is fixed to the upper screw. The tapered pin may be fixed by welding. A female upper end of the lower screw is fitted into the male joint 4 and a taper pin is driven into the tapered pin driving groove 9b, and the driven taper pin is provided at the female upper end. The male joint portion 4 is fixed to the lower screw while being engaged with a driving hole (not shown). Also in this case, the tapered pin may be fixed by welding. The upper screw, the shaft joint 2 and the lower screw integrated in this way rotate about the axis of the shaft joint 2.

The shaft coupling 2 is rotatably supported by a bearing mechanism 5. Bearings 6 are provided in the bearing mechanism 5 so as to surround the shaft coupling 2.

Oil seals 11 are provided between the shaft coupling 2 and the bearing mechanism 5, and grease for reducing friction is sealed in the sealed space 12. The grease is fed from the grease hole 18 shown in FIG. Further, between the shaft coupling 2 and the bearing mechanism 5,
Dust seals 10, 1 are provided outside the oil seals 11, 11.
0 is provided. This prevents the surrounding fine particles such as sand from entering between the shaft coupling 2 and the bearing mechanism 5 during boring.

The screw shaft support device 1 of the present embodiment is provided with two connectors 7. However, when the screw shaft support device 1 is applied to a three-axis auger machine, as shown in FIG. May have only one connector 7. When a plurality of connecting tools 7 are provided, the installation positions of the connecting tools 7 on the bearing mechanism are changed according to the positional relationship of the screws in the auger machine. Further, in the above embodiment, the female joint is provided at the upper end of the shaft coupling and the male joint is provided at the lower end,
The upper end may be a male joint and the lower end may be a female joint. The outer shape of the shaft coupling is not limited to a cylinder, and may be a hexagonal prism.

[0023]

As described above, according to the screw shaft support device of the first invention, since a bearing is used in a portion where friction occurs due to rotation of the screw, metal powder is generated due to wear of the metal. And there is almost no noise due to friction. In addition, when a problem occurs, it may be replaced, and there is no need to repair the metal. In addition, the use of bearings reduces the resistance to the screw shaft during rotation, thereby reducing the torsional stress applied to the screw shaft and reducing the screw shaft torsion. Excavation can be performed.
According to the second aspect of the present invention, an oil seal is provided between the bearing mechanism and the shaft coupling, and grease is sealed therein.
Problems due to friction are further reduced. Further, by providing a dust seal between the bearing mechanism and the shaft coupling according to the third aspect of the invention, the occurrence of friction due to penetration of fine particles such as sand is reliably prevented. Further, the screw shaft supporting device provided with a plurality of the connecting tools of the fourth invention is conveniently used as a member for preventing interference between the screws in an auger machine having three or more screws. Further, the screw shaft supporting device of the fifth invention can communicate milk with the screw shaft, so that it can be applied to an auger machine used for a so-called SMW.

[Brief description of the drawings]

FIG. 1 is a plan view of a screw shaft support device according to one embodiment of the present invention.

FIG. 2 is a front view of the screw shaft support device shown in FIG.

FIG. 3 is a sectional view taken along line YY of FIG. 1;

FIG. 4 is a plan view showing a state where the screw shaft support device shown in FIG. 1 is connected.

FIG. 5 is a side view showing a state in which the screw shaft support device shown in FIG. 1 is attached to a screw of an auger machine.

FIG. 6 is a plan view showing a state where a screw shaft support device according to another embodiment is connected.

FIG. 7 is a diagram illustrating an interference band according to the related art.

[Explanation of symbols]

 1,16 Screw shaft support device 2 Shaft coupling 3 Female joint 4 Male joint 5 Bearing mechanism 6 Bearing 7 Connector 7a Convex part 7b Concave part 8 Coupling hole 9a Taper pin driving hole 9b Taper pin driving groove DESCRIPTION OF SYMBOLS 10 Dust seal 11 Oil seal 12 Enclosure space 13 Bolt and nut 15a, 15b, 15c Screw 17 Milk passage hole 18 Grease hole

Claims (5)

(57) [Claims] 1. A shaft having a female joint at one end connected to the male end of one screw shaft and a male joint at the other end connected to the female end of another screw shaft. A joint mechanism, a bearing mechanism for rotatably supporting the shaft joint about the axis, and a connector provided on the bearing mechanism and connected to a connector of another adjacent screw shaft support device. Screw shaft support device. 2. The screw shaft supporting device according to claim 1, wherein an oil seal is provided between the bearing mechanism and the shaft coupling to seal grease. 3. The screw shaft supporting device according to claim 1, wherein a dust seal is provided between the bearing mechanism and the shaft coupling. 4. The screw shaft supporting device according to claim 1, wherein a plurality of the connecting tools are provided. 5. The milk coupling according to claim 1, wherein the shaft coupling has a milk passage hole communicating with the milk passage hole of the screw shaft.
The screw shaft support device according to any one of the above.