JP2018136003A - Eccentric universal joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an eccentric universal joint that even when lateral deviation occurs between a first pipe and a second pipe, can absorb the deviation to connect the first pipe and the second pipe.SOLUTION: An eccentric universal joint mechanism 10 includes a first sleeve 21, a second sleeve 22, and an eccentric universal joint 10A connecting between the first sleeve 21 and the second sleeve 22. The eccentric universal joint 10A has a first eccentric tube 11, and a second eccentric tube provided rotatably to the first eccentric tube 11. A deviation between a central line C1 of the first eccentric tube 11 and a central line C2 of the second eccentric tube 12 is determined by a rotation position of the second eccentric tube 12. Based on the relationship between a predetermined rotation position and the deviation, deviation display scales 51, 52 are provided at positions corresponding to the deviation, on the outer surfaces of the first eccentric tube 11 and second eccentric tube 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an eccentric universal joint that connects a first pipe and a second pipe. In particular, even if a shift occurs between the first pipe and the second pipe, the first pipe and the second pipe are securely connected. The present invention relates to an eccentric universal joint.

  2. Description of the Related Art Conventionally, an expansion joint that connects a first pipe and a second pipe is known.

  Such an expansion joint can absorb the axial displacement even if the first piping and the second piping are slightly displaced in the axial direction, and can appropriately join the first piping and the second piping.

  On the other hand, when the first piping and the second piping are displaced in the lateral direction, it is difficult to join the first piping and the second piping by absorbing such lateral displacement.

JP-A-3-285137 JP 2005-91215 A JP 2004-53317 A JP 2004-10355 A

  The present invention has been made in consideration of such points, and even if a slight shift occurs in the lateral direction between the first pipe and the second pipe, the shift is absorbed and the first pipe and the second pipe are absorbed. An object of the present invention is to provide an eccentric universal joint capable of reliably joining two pipes and easily adjusting the amount of deviation.

  According to the present invention, a first eccentric tube having a circular first opening and a circular second opening whose axes are eccentric with each other, and the first eccentric tube are rotatably connected to the first eccentric tube, and the axes are eccentric. And 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 together. 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 rotational position of the second eccentric tube relative to the first eccentric tube. Based on the relationship between the determined rotational position and the amount of displacement, a predetermined displacement amount display scale including the amount of displacement is placed at a corresponding circumferential position of each of the first eccentric tube and the second eccentric tube. Provided by aligning the corresponding displacement amount display scales of the first eccentric tube and the second eccentric tube. Is eccentric universal joint, characterized in that to determine the rotational position of the second eccentric pipe relative to the first eccentric tube.

  The present invention provides a predetermined displacement direction indication scale including a displacement direction of an axis of the second opening of the first eccentric tube and an axis of the fourth opening of the second eccentric tube, the first eccentric tube and the first eccentric tube. The eccentric universal joint is provided at a corresponding circumferential position of at least one of the two eccentric tubes.

  The present invention provides a predetermined displacement direction indication scale including a displacement direction of an axis of the second opening of the first eccentric tube and an axis of the fourth opening of the second eccentric tube, the first eccentric tube and the first eccentric tube. It is an eccentric universal joint characterized in that it is provided at corresponding circumferential positions on both of the two eccentric tubes.

  As described above, according to the present invention, it is possible to reliably absorb the lateral displacement generated between the first piping and the second piping, and to easily adjust the amount of the displacement.

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

BEST MODE FOR CARRYING OUT THE INVENTION

First, an eccentric universal joint mechanism and an eccentric universal joint will be described with reference to FIGS. 1 to 3B.
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 pipe. 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 piping 1 and the second piping 2 are existing, and the first piping 1 and the second piping 2 are installed with a slight shift in the axial and lateral directions with respect to the design position. Sometimes.

  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 second pipe 2 connected to each other. Two pipes 2 can be connected appropriately.

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

  Among these, the eccentric universal joint 10 </ b> A is joined to the first eccentric tube 11 joined to the first sleeve 21 and the second sleeve 22 and is joined to the first eccentric tube 11 so as to be rotatable. And 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 includes 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 part 11b is eccentric with respect to the axis of the large diameter part 11a. In this case, the axis of the small diameter portion 11 b constitutes the center line C <b> 1 of the first eccentric tube 11. The first eccentric tube 11 has a substantially cylindrical shape that is eccentric.

  As shown in FIG. 3B, the second eccentric tube 12 includes 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.

  3A and 3B, by bringing the second eccentric tube 12 to the desired rotational 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 eccentric tube 11). The center C1 of the tube 11 and the axis line C2 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 matched (see FIG. 1).

  Further, by rotating the second eccentric tube 12 with respect to the first eccentric tube 11, for example, the axis line 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 12 of the 12 small-diameter portions 12b (that is, the center of the second eccentric tube 12) C2 can be largely shifted. As a result, even if the first sleeve 21 and the second sleeve 22 are greatly displaced in the lateral direction by the eccentric universal joint 10A, the lateral displacement can be adjusted (aligned). 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 a first packing 23. The first packing 23 surrounds the first packing 23 and is divided in the circumferential direction. It is held by the first housing 24. Each of the divided first housings 24 is fixed by a mounting bolt (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 joined to each other so as to be slidable along the axial direction. A 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 that is divided in the circumferential direction. Furthermore, the first sleeve 21 is joined to the first pipe 1. Further, the second eccentric tube 12 of the eccentric universal joint 10 </ b> A 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 tube 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 used. Are covered with a second packing 40, which 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. 1a and 2a are connected to main pipes 1b and 2b via flanges 1c and 2c. And the 1st piping 1 is comprised by the flange short pipe 1a and the main pipe 1b, and the 2nd piping 2 is comprised by the flange short pipe 2a and the main pipe 2b. 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 are The mounting flanges 35 and 36 are fixed in the circumferential direction and the axial direction by tie bolts 37 mounted along the circumferential direction.

  By the way, depending on the rotational position of the second eccentric tube 12 with respect to the first eccentric tube 11, 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; In addition, the direction of deviation between the axis C1 and the axis C2 is determined. The rotational position of the second eccentric tube with respect to the first eccentric tube 11 and the shift amount 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 deviation direction between the axis C1 and the axis C2 is determined and set in advance.

  In the present embodiment, as shown in FIGS. 4A to 4C, based on the relationship between the rotation position and the shift amount, predetermined shift amount display scales 51 and 52 including the shift amount are provided as the first eccentric tube. 11 and the second eccentric tube 12 are provided on the outer surface. In this case, the deviation amount display scales 51 and 52 are provided on 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 the corresponding circumferential positions. It has been.

  Furthermore, predetermined displacement direction indication scales 53 and 54 including the displacement direction of the axis of the small diameter portion 11 b of the first eccentric tube 11 and the axis of the small diameter portion 12 b of the second eccentric tube 12 are the first eccentric tube 11 and the second eccentric tube 11. It is provided on the outer surface of the eccentric tube 12. In this case, the displacement direction indication 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 respective corresponding circumferential positions. It has been.

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

  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 is used. 11a and the center line C of the large diameter portion 12a of the second eccentric tube 12 are 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 displaced laterally with respect to the design position, the second pipe 1 is second with respect to the first eccentric pipe 11 of the eccentric universal joint 10A as shown in FIG. The eccentric tube 12 is rotated so that the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 are the same amount of displacement as the lateral displacement 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 in accordance with the amount of lateral displacement between the first pipe 1 and the second pipe 2 is called alignment. Note that the second pipe 2 is displaced laterally (vertically in FIG. 2) with respect to the first pipe 1, and the second eccentric pipe corresponding to the center line C1 of the first eccentric pipe 11 correspondingly. Twelve center lines C2 are aligned laterally (vertically).

  Thereafter, 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 reduced. maintain.

  Next, alignment that matches 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 with reference to FIGS. 4A to 4C.

  For example, when the first pipe 1 and the second pipe 2 are not misaligned and alignment of the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 is unnecessary, as shown in FIG. 4A. “0” of the shift amount display scale 51 of the first eccentric tube 11 and “0” of the shift amount display scale 52 of the second eccentric tube 12 are aligned with respect to the rotation direction.

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

  Next, the first pipe 1 and the second pipe 2 are misaligned, and when the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 are shifted by 25 mm, as shown in FIG. The second eccentric tube 12 is rotated with respect to the one eccentric tube 11, and “25” of the displacement amount display scale 51 of the first eccentric tube 11 and the displacement amount display scale 52 of the second eccentric tube 12 are related 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 eccentric amount (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 direction display scale 53 and the displacement direction display scale 54 of the second eccentric tube 12.

  Thus, 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 displacement direction, the eccentric universal joint mechanism 10 can be easily and reliably installed between the first pipe 1 and the second pipe 2.

  Next, when the 1st piping 1 and the 2nd piping 2 have shifted | deviated largely, when shifting the centerline C1 of the 1st eccentric tube 11 and the centerline C2 of the 2nd eccentric tube 12 by 50 mm, as shown to FIG. 4C The second eccentric tube 12 is rotated with respect to the first eccentric tube 11, and “50” of the displacement amount display scale 51 of the first eccentric tube 11 and the displacement amount display scale 52 of the second eccentric tube 12 in the rotation direction. Set “50”.

  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 (displacement direction) between the center line C1 of the first eccentric tube 11 and the center line C2 of the second eccentric tube 12 is the displacement of the displacement 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.

  Thus, 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 shift direction, the eccentric universal joint mechanism 10A can be easily and reliably installed between the first pipe 1 and the second pipe 2.

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

  In the above embodiment, the first eccentric tube 11 has a first opening portion 11a composed of a large diameter portion and a second opening portion 11b composed of a small diameter portion, and the second eccentric tube 12 extends from the large diameter portion. Although the example which has the 3rd opening part 12a which becomes and the 4th opening part 12b which consists of a small diameter part was shown, not only this but the 1st opening part 11a and the 2nd opening part 11b of the 1st eccentric tube 11 are the same diameter The third opening 12a and the fourth opening 12b of the second eccentric tube 12 may also have the same diameter.

  Moreover, although the example which provided the displacement direction display scales 53 and 54 in both the 1st eccentric tube 11 and the 2nd eccentric tube 12 was shown, it is not restricted to this but only one of the 1st eccentric tube 11 and the 2nd eccentric tube 12 In addition, a displacement direction display scale may be provided.

  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 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 relative to the first eccentric tube 11, the center line C 1 of the first eccentric tube 11 and the center line C 2 of the second eccentric tube 12 are shifted, and the first eccentric tube 11. Is slid along the axial direction with respect to the first sleeve 21. Thus, 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 designed position, the deviation is absorbed by the eccentric universal joint mechanism 10, and the first pipe 1. And the second pipe 2 can be reliably connected by the eccentric universal joint mechanism 10.

DESCRIPTION OF SYMBOLS 1 1st piping 2 2nd piping 10 Eccentric universal joint mechanism 10A Eccentric universal joint 11 1st eccentric tube 12 2nd eccentric tube 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 Shift amount display scale 52 Shift amount display scale 53 Shift direction display scale 54 Shift direction display scale

Claims (3)

A first eccentric tube having a circular first opening and a circular second opening whose axes are eccentric from each other;
A second eccentric tube having a circular third opening and a circular fourth opening that are pivotally joined to the first eccentric tube and whose axes are eccentric to each other;
The first opening of the first eccentric tube and the third opening of the second eccentric tube are joined,
The rotational position of the second eccentric tube relative to the first eccentric tube determines 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,
Based on a predetermined relationship between the rotational position and the deviation amount, a predetermined deviation amount display scale including the deviation amount is displayed in a circumferential position corresponding to each of the first eccentric tube and the second eccentric tube. Provided in
An eccentric universal joint characterized in that a rotational position of the second eccentric tube relative to the first eccentric tube is determined by matching corresponding displacement amount display scales of the first eccentric tube and the second eccentric tube.   A predetermined displacement direction indication scale including a displacement 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 displayed on the first eccentric tube and the second eccentric tube. The eccentric universal joint according to claim 1, wherein the eccentric universal joint is provided at at least one corresponding circumferential position.   A predetermined displacement direction indication scale including a displacement 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 displayed on the first eccentric tube and the second eccentric tube. The eccentric universal joint according to claim 2, wherein the eccentric universal joint is provided at a corresponding circumferential position on both sides.