JP6893681B2 - Eccentric universal joint - Google Patents

Description

The present invention relates to an eccentric universal joint that connects the first pipe and the second pipe, and particularly secures the first pipe and the second pipe even if there is a gap between the first pipe and the second pipe. Regarding eccentric universal joints that can be.

Conventionally, expansion pipe joints for connecting the first pipe and the second pipe have been known.

Such a telescopic pipe joint can absorb the deviation in the axial direction even if the first pipe and the second pipe are slightly displaced in the axial direction, and can appropriately join the first pipe and the second pipe.

On the other hand, when the first pipe and the second pipe are laterally displaced, it is difficult to absorb such the lateral displacement and join the first pipe and the second pipe.

Japanese Unexamined Patent Publication No. 3-285137 Japanese Unexamined Patent Publication No. 2005-91215 Japanese Unexamined Patent Publication No. 2004-53317 Japanese Unexamined Patent Publication No. 2004-10355

The present invention has been made in consideration of such a point, and even if there is a slight lateral deviation between the first pipe and the second pipe, this deviation is absorbed to absorb the deviation between the first pipe and the second pipe. It is an object of the present invention to provide an eccentric universal joint capable of reliably joining two pipes and easily adjusting the amount of deviation.

In the present invention, a first eccentric tube having a circular first opening and a circular second opening whose axes are eccentric to each other is rotatably joined to the first eccentric tube, and the axes are eccentric to each other. It has a second eccentric tube having a circular third opening and a circular fourth opening, and the first opening of the first eccentric tube and the third opening of the second eccentric tube are joined. The amount of deviation between the axis of the second opening of the first eccentric tube and the axis of the fourth opening of the second eccentric tube is determined in advance by the rotation position of the second eccentric tube with respect to the first eccentric tube. Based on the relationship between the determined rotation position and the deviation amount, a predetermined deviation amount display scale including the deviation amount is set to the corresponding circumferential position of the first eccentric tube and the second eccentric tube. The eccentric free to be provided, characterized in that the rotation position of the second eccentric tube with respect to the first eccentric tube is determined by matching the corresponding deviation amount display scales of the first eccentric tube and the second eccentric tube. It is a joint.

In the present invention, the first eccentric tube and the first eccentric tube and the first eccentric tube have a predetermined deviation direction display scale including the deviation direction of the axis of the second opening of the first eccentric tube and the axis of the fourth opening of the second eccentric tube. 2 An eccentric universal joint characterized in that it is provided at at least one of the eccentric tubes at a corresponding circumferential position.

In the present invention, the first eccentric tube and the first eccentric tube and the first eccentric tube have a predetermined deviation direction display scale including the deviation direction of the axis of the second opening of the first eccentric tube and the axis of the fourth opening of the second eccentric tube. 2 An eccentric universal joint characterized in that it is provided at the corresponding circumferential positions of both eccentric tubes.

As described above, according to the present invention, the lateral deviation that occurs between the first pipe and the second pipe can be reliably absorbed, and the amount of this deviation can be easily adjusted.

FIG. 1 is a side sectional view showing an eccentric universal joint according to the first embodiment. FIG. 2 is a side sectional view showing the operation of the eccentric universal joint according to the first embodiment. FIG. 3A is a front view showing the first eccentric tube. FIG. 3B is a front view showing the second eccentric tube. FIG. 4A is a diagram showing the operation of an eccentric universal joint including a displacement amount display. FIG. 4B is a diagram showing the operation of an eccentric universal joint including a displacement amount display. FIG. 4C is a diagram showing the operation of an eccentric universal joint including a displacement amount display.

Embodiment of the invention

First, the eccentric universal joint mechanism and the eccentric universal joint will be described with reference to FIGS. 1 to 3B.
Here, FIG. 1 is a side sectional view showing the eccentric universal joint mechanism and the eccentric universal joint, FIG. 2 is a side sectional view showing a state in which the eccentric universal joint is rotated, and FIG. 3A is a front view showing the inside of the first eccentric tube. FIG. 3B is a front view showing the inside of the second eccentric tube.

As shown in FIGS. 1 to 3A and 3B, the eccentric universal joint mechanism 10 connects the first pipe 1 and the second pipe 2.

In this case, the first pipe 1 and the second pipe 2 are existing ones, and the first pipe 1 and the second pipe 2 are installed slightly offset in the axial direction and the lateral direction with respect to the design position. There are times.

As described above, even if the first pipe 1 and the second pipe 2 are slightly displaced in the axial direction and the lateral direction with respect to the design position, the eccentric universal joint mechanism 10 according to the present invention has the first pipe 1 and the first pipe 2. 2 Piping 2 can be connected appropriately.

Such an eccentric universal joint mechanism 10 includes an eccentric universal joint 10A that joins the first sleeve 21, the second sleeve 22, and the first sleeve 21 and the second sleeve 22.

Of these, the eccentric universal joint 10A is joined to the first eccentric tube 11 joined to the first sleeve 21 and the second sleeve 22, and is rotatably joined to the first eccentric tube 11. It has an eccentric tube 12.

The first eccentric tube 11 and the second eccentric tube 12 have substantially the same structure. That is, as shown in FIG. 3A, the first eccentric tube 11 has a circular large-diameter portion (first opening) 11a on the second eccentric tube 12 side and a circular small-diameter portion (second opening) on the first sleeve 21 side. Part) 11b, and the axis of the small-diameter portion 11b is eccentric with respect to the axis of the large-diameter portion 11a. In this case, the axis of the small diameter portion 11b constitutes the center line C1 of the first eccentric tube 11. The first eccentric tube 11 has an eccentric substantially cylindrical shape.

Further, as shown in FIG. 3B, the second eccentric tube 12 has a circular large-diameter portion (third opening) 12a on the first eccentric tube 11 side and a circular small-diameter portion (fourth opening) on the second sleeve 22 side. Part) 12b, and the axis of the small diameter portion 12b is eccentric with respect to the axis of the large diameter portion 12a. In this case, the axis of the small diameter portion 12b constitutes the center line C2 of the second eccentric tube 12. The second eccentric tube 12 has an eccentric substantially cylindrical shape. Further, the large-diameter portion (first opening) 11a of the first eccentric tube 11 and the large-diameter portion (third opening) 12a of the second eccentric tube 12 are joined.

In FIGS. 3A and 3B, by bringing the second eccentric tube 12 to a desired rotation position with respect to the first eccentric tube 11, for example, the axis of the small diameter portion 11b of the first eccentric tube 11 (that is, the first eccentricity). The center of the tube 11) C1 and the axis of the small diameter portion 12b of the second eccentric tube 12 (that is, the center of the second eccentric tube 12) C2 can be aligned (see FIG. 1).

Further, by rotating the second eccentric tube 12 with respect to the first eccentric tube 11, for example, the axis of the small diameter portion 11b of the first eccentric tube 11 (that is, the center of the first eccentric tube 11) C1 and the second eccentric tube The axis line (that is, the center of the second eccentric tube 12) C2 of the small-diameter portion 12b of the 12 can be largely deviated. As a result, even if the first sleeve 21 and the second sleeve 22 are largely displaced in the lateral direction by the eccentric universal joint 10A, the lateral displacement can be adjusted (aligned). In FIGS. 3A and 3B, the center line C0 of the large-diameter portion 11a of the first eccentric tube 11 and the large-diameter portion 12a of the second eccentric tube 12 is shown.

Further, the joint portion between the first eccentric tube 11 and the second eccentric tube 12 of the eccentric universal joint 10A is covered with the first packing 23, and the first packing 23 surrounds the first packing 23 and is divided in the circumferential direction. It is held by the first housing 24. Further, each of the divided first housings 24 is fixed by mounting bolts (not shown).

Further, as shown in FIGS. 1 and 2, the first eccentric tube 11 and the first sleeve 21 of the eccentric universal joint 10A are slidably joined to each other along the axial direction, and are joined to the first eccentric tube 11 in a slidable manner. The joint portion with the first sleeve 21 is covered with a sliding packing 30, and the sliding packing 30 is held by a sliding packing housing 31 divided in the circumferential direction. Furthermore, the first sleeve 21 is joined to the first pipe 1. Further, the second eccentric pipe 12 of the eccentric universal joint 10A is joined to the second sleeve 22, and the second sleeve 22 is joined to the second pipe 2.

In this case, the joint between the second eccentric pipe 12 and the second sleeve 22 of the eccentric universal joint 10A, the joint between the first sleeve 21 and the first pipe 1, and the joint between the second sleeve 22 and the second pipe 2. Are all covered by a second packing 40, and the second packing 40 surrounds the second packing 40 and is held by a second housing 41 divided in the circumferential direction.

As shown in FIG. 1, each of the first pipe 1 and the second pipe 2 has flange short pipes 1a and 2a provided on the first sleeve 21 and the second sleeve 22 side, and these flange short pipes are provided. 1a and 2a are connected to the main pipes 1b and 2b via flanges 1c and 2c. The flange short pipe 1a and the main pipe 1b form the first pipe 1, and the flange short pipe 2a and the main pipe 2b form the second pipe 2. Further, the first eccentric tube 11 of the eccentric universal joint 10A has a mounting flange 35 on its outer surface, the first sleeve 21 has a mounting flange 36 on its outer surface, and the first eccentric tube 11 and the first sleeve 21 have a mounting flange 35. The tie bolts 37 mounted on the mounting flanges 35 and 36 along the circumferential direction are fixed in the circumferential direction and the axial direction.

By the way, the amount of deviation between the axis C1 of the small diameter portion 11b of the first eccentric tube 11 and the axis C2 of the small diameter portion 12b of the second eccentric tube 12 due to the rotation position of the second eccentric tube 12 with respect to the first eccentric tube 11. And the deviation direction between the axis C1 and the axis C2 is determined. Then, the rotation position of the second eccentric tube with respect to the first eccentric tube 11 and the amount of deviation between the axis C1 of the small diameter portion 11b of the first eccentric tube 11 and the axis C2 of the small diameter portion 12b of the second eccentric tube 12. , The relationship between the axis C1 and the axis C2 in the deviation direction is predetermined and set.

In the present embodiment, as shown in FIGS. 4A to 4C, the predetermined deviation amount display scales 51 and 52 including the deviation amount are the first eccentric tubes based on the relationship between the rotation position and the deviation amount. It is provided on the outer surface of the 11 and the second eccentric tube 12. In this case, the deviation amount display scales 51 and 52 are the outer surface on the first sleeve 21 side of the first eccentric tube 11 and the outer surface on the second sleeve 22 side of the second eccentric tube 12, and are provided at their respective circumferential positions. Has been done.

Furthermore, predetermined deviation direction display scales 53 and 54 including the deviation direction of the axis of the small diameter portion 11b of the first eccentric tube 11 and the axis of the small diameter portion 12b of the second eccentric tube 12 are the first eccentric tube 11 and the second. It is provided on the outer surface of the eccentric tube 12. In this case, the deviation direction display scales 53 and 54 are the outer surface on the first sleeve 21 side of the first eccentric tube 11 and the outer surface on the second sleeve 22 side of the second eccentric tube 12, and are provided at their respective circumferential positions. Has been done.

The deviation amount display scale 51 of the first eccentric tube 11 and the deviation amount display scale 52 of the second eccentric tube 12 are actually the outer surface of the first eccentric tube 11 on the first sleeve 21 side and the second sleeve 22 side of the second eccentric tube 12. Although it is displayed on the outer surface, it is displayed in the same direction in FIGS. 4A to 4C for convenience.

Further, in FIGS. 4A to 4C, in addition to the axis C1 of the small diameter portion 11b of the first eccentric tube 11 and the axis C2 of the small diameter portion 12b of the second eccentric tube 12, the large diameter portion of the first eccentric tube 11 The center line C of the large-diameter portion 12a of the 11a and the second eccentric tube 12 is shown.

Next, the operation of the present embodiment having such a configuration will be described with reference to FIGS. 1, 3A and 3B, and FIGS. 4A to 4C.

First, when the existing first pipe 1 and the second pipe 2 are laterally displaced with respect to the design position, as shown in FIG. 2, the second eccentric pipe 11 of the eccentric universal joint 10A is second. By rotating the eccentric tube 12, the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 are displaced by the same amount as the lateral displacement amount of the first pipe 1 and the second pipe 2. Just shift. In this way, shifting the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 according to the amount of lateral displacement of the first pipe 1 and the second pipe 2 is called alignment. The second pipe 2 is laterally displaced (up and down in FIG. 2) with respect to the first pipe 1, and the second eccentric pipe is correspondingly displaced with respect to the center line C1 of the first eccentric pipe 11. The center line C2 of 12 is centered laterally (vertically).

After that, the second eccentric tube 12 does not rotate with respect to the first eccentric tube 11, and the amount of deviation between the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 is determined. maintain.

Next, with reference to FIGS. 4A to 4C, the alignment of the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 will be further described.

For example, when the first pipe 1 and the second pipe 2 are not misaligned and the center line C1 of the first eccentric pipe 11 and the center line C2 of the second eccentric pipe 12 do not need to be aligned, as shown in FIG. 4A. The "0" of the deviation amount display scale 51 of the first eccentric tube 11 and the "0" of the deviation amount display scale 52 of the second eccentric tube 12 are aligned with respect to the rotation direction.

In FIG. 4A, the eccentricity (deviation amount) is "0 mm", and the eccentric direction (deviation direction) is not specified.

Next, when the first pipe 1 and the second pipe 2 are misaligned and the center line C1 of the first eccentric pipe 11 and the center line C2 of the second eccentric pipe 12 are shifted by 25 mm, as shown in FIG. The second eccentric tube 12 is rotated with respect to the first eccentric tube 11, and the deviation amount display scale 51 of the first eccentric tube 11 and the deviation amount display scale 52 of the second eccentric tube 12 with respect to the rotation direction. Match "25".

Then, the rotation of the second eccentric tube 12 with respect to the first eccentric tube 11 is stopped and fixed.

At this time, the eccentricity (deviation amount) of the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 is "25 mm", and the eccentric direction (deviation direction) is the deviation of the first eccentric tube 11. It is displayed as "25" in the deviation direction display scale 54 of the direction display scale 53 and the second eccentric tube 12.

In this way, the amount of deviation between the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 is set to 25 mm, and the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 By determining the deviation direction, the eccentric universal joint mechanism 10 can be easily and surely installed between the first pipe 1 and the second pipe 2.

Next, when the first pipe 1 and the second pipe 2 are largely deviated from each other and the center line C1 of the first eccentric pipe 11 and the center line C2 of the second eccentric pipe 12 are shifted by 50 mm, as shown in FIG. 4C. The second eccentric tube 12 is rotated with respect to the first eccentric tube 11, and the deviation amount display scale 51 of the first eccentric tube 11 and the deviation amount display scale 52 of the second eccentric tube 12 are rotated in the rotation direction. Match "50" of.

Then, the rotation of the second eccentric tube 12 with respect to the first eccentric tube 11 is stopped and fixed.

At this time, the eccentric direction (deviation direction) of the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 is the deviation of the deviation direction display scale 53 of the first eccentric tube 11 and the second eccentric tube 12. It is displayed as "50" in the direction display scale 54.

In this way, the amount of deviation between the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 is set to 50 mm, and the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 By determining the deviation direction, the eccentric universal joint mechanism 10A can be easily and surely installed between the first pipe 1 and the second pipe 2.

As described above, according to the present embodiment, the lateral displacement that occurs between the first pipe 1 and the second pipe 2 can be easily and surely adjusted by the eccentric universal joint.

In the above embodiment, the first eccentric tube 11 has a first opening 11a formed of a large-diameter portion and a second opening 11b formed of a small-diameter portion, and the second eccentric tube 12 has a large-diameter portion. Although an example having a third opening 12a and a fourth opening 12b composed of a small diameter portion is shown, the first opening 11a and the second opening 11b of the first eccentric tube 11 are not limited to this, and have the same diameter. The third opening 12a and the fourth opening 12b of the second eccentric tube 12 may also have the same diameter.

Further, an example in which the deviation direction display scales 53 and 54 are provided on both the first eccentric tube 11 and the second eccentric tube 12, but the present invention is not limited to this, and only one of the first eccentric tube 11 and the second eccentric tube 12 is provided. May be provided with a shift direction display scale.

On the other hand, when the first pipe 1 and the second pipe 2 are slightly displaced along the axial direction, the first eccentric pipe 11 of the eccentric universal joint 10A slides along the axial direction with respect to the first sleeve 21. Let me. Next, the first eccentric tube 11 and the first sleeve 21 are fixed by tie bolts 37 along both the axial direction and the circumferential direction.

In this way, the second eccentric tube 12 is rotated with respect to the first eccentric tube 11 to shift the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12, and the first eccentric tube 11 Is slid along the axial direction with respect to the first sleeve 21. As a result, even if the first pipe 1 and the second pipe 2 are displaced in the lateral direction and the axial direction with respect to the design position, the deviation is absorbed by the eccentric universal joint mechanism 10 and the first pipe 1 is displaced. And the second pipe 2 can be securely connected by the eccentric universal joint mechanism 10.

1 1st pipe 2 2nd pipe 10 Eccentric free joint mechanism 10A Eccentric free joint 11 1st eccentric pipe 12 2nd eccentric pipe 21 1st sleeve 22 2nd sleeve 23 1st packing 24 1st housing 30 Sliding packing 31 Sliding Packing housing 35 Mounting flange 36 Mounting flange 37 Tie bolt 40 Second packing 41 Second housing 51 Misalignment amount display scale 52 Misalignment amount display scale 53 Misalignment direction display scale 54 Misalignment direction display scale

Claims (3)

A first eccentric tube having a circular first opening and a circular second opening whose axes are eccentric to each other, and a circular first eccentric tube rotatably joined to the first eccentric tube and whose axes are eccentric to each other. It has a second eccentric tube with three openings and a circular fourth opening,
The first opening of the first eccentric tube and the third opening of the second eccentric tube are joined to each other.
The amount of deviation between the axis of the second opening of the first eccentric tube and the axis of the fourth opening of the second eccentric tube is determined by the rotation position of the second eccentric tube with respect to the first eccentric tube.
Based on the predetermined relationship between the rotation position and the deviation amount, a predetermined deviation amount display scale including the deviation amount is set to the corresponding circumferential position of the first eccentric tube and the second eccentric tube. Provided in
By combining the specific deviation amount of the deviation amount display scale of the first eccentric tube and the deviation amount of the deviation amount scale of the second eccentric tube, which is the same as the specific deviation amount of the first eccentric tube, the said the second pivoting position of the eccentric tube constant Umate to the first eccentric tube, the deviation amount between the axis of the fourth opening of the and the axis second eccentric pipe of the second opening of the first eccentric pipe An eccentric universal joint characterized by defining. A predetermined deviation direction display scale including the deviation direction of the axis of the second opening of the first eccentric tube and the axis of the fourth opening of the second eccentric tube is set on the first eccentric tube and the second eccentric tube. Provided at at least one of the corresponding circumferential positions
The deviation direction display scale of the first eccentric tube or the second eccentric tube indicates a display and a deviation direction corresponding to the deviation amount, and among the deviation direction display scales, the deviation direction of the display corresponding to the specific deviation amount. The eccentric universal joint according to claim 1 , wherein is in the direction of deviation between the axis of the second opening of the first eccentric tube and the axis of the fourth opening of the second eccentric tube. A predetermined deviation direction display scale including the deviation direction of the axis of the second opening of the first eccentric tube and the axis of the fourth opening of the second eccentric tube is set on the first eccentric tube and the second eccentric tube. Provided at the corresponding circumferential positions on both sides
The deviation direction display scales of the first eccentric tube and the second eccentric tube indicate the display and the deviation direction corresponding to the deviation amount, and among the deviation direction display scales, the deviation direction of the display corresponding to the specific deviation amount. The eccentric universal joint according to claim 2, wherein is in the direction of deviation between the axis of the second opening of the first eccentric tube and the axis of the fourth opening of the second eccentric tube.

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