JP7470615B2 - Shaft coupling cover and pump device equipped with same - Google Patents

Description

The present invention relates to a coupling cover and a pump device equipped with the same.

Patent Document 1 discloses a shaft coupling cover that is fixed to the pump body without using legs or the like in order to reduce the number of parts. Such a shaft coupling cover comprises a shaft coupling cover main body and an attachment that covers the opening of the shaft coupling cover main body on the pump body side. The attachment is fixed to the bearing cover of the pump body, and the shaft coupling cover main body is fixed to the bearing cover via the attachment.

However, the shaft coupling cover described in Patent Document 1 does not allow adjustment of the axial length. Therefore, it cannot accommodate differences in the distance between the prime mover and the pump body due to reasons such as different combinations of the prime mover and the pump body. Specifically, when the distance between the prime mover and the pump body is different, a new shaft coupling cover must be designed to minimize exposure of the transmission parts, including the prime mover shaft, the pump shaft, and the shaft coupling connecting the prime mover shaft and the pump shaft.

Patent No. 6671272

The objective of the present invention is to minimize exposure of the transmission parts between the prime mover and the pump body while suppressing an increase in the number of parts, even when the distance between the prime mover and the pump body varies.

The present invention provides a shaft coupling cover comprising: a fixed cover covering at least a part of a transmission section including a prime mover shaft which is the main shaft of a prime mover that drives the pump body, a pump shaft which is the main shaft of the pump body, and a shaft coupling connecting the prime mover shaft and the pump main shaft; and an adjustable cover which is fixed to the fixed cover so as to be adjustable in position in the axial direction of the prime mover shaft so as to protrude from the tip side of the fixed cover towards the prime mover, and which covers a part of the transmission section which is exposed from the fixed cover, and further comprising an escape portion provided at a lower part on the base end side of the fixed cover, and a closing member attached to the base end side of the fixed cover so as to close an open portion which allows access to the transmission section from outside the fixed cover via the escape portion .

The coupling cover of the present invention can fix the coupling cover while suppressing an increase in the number of parts. That is, by fixing the fixed cover to the pump body and fixing the adjustment cover to the pump body via the fixed cover, the coupling cover can be fixed without the need for parts such as legs that support the coupling cover vertically. Furthermore, the coupling cover of the present invention can adjust the axial length of the coupling cover while suppressing an increase in the number of parts. That is, by fixing the adjustment cover, whose fixing position is adjustable, at any axial position of the fixed cover, the axial length of the coupling cover can be adjusted, and the exposure of the transmission part between the prime mover and the pump body can be minimized.

Specifically, the fixed cover and the adjustable cover each include a cylindrical cover body, a slit portion that divides the cover body in the longitudinal direction, and a pair of flange portions that protrude from the cover body and face the slit portion. The pair of flange portions of the fixed cover are clamped from the outside by the pair of flange portions of the adjustable cover, thereby fixing the adjustable cover to the fixed cover.

The flange portion of the fixed cover extends in the axial direction, so the axial fixed position of the adjustable cover can be adjusted.

More specifically, the clamping method differs depending on the size of the coupling cover. When the coupling cover is small, the length of the flange portion of the adjustment cover that protrudes outward is longer than the length of the flange portion of the fixed cover that protrudes outward. Also, the flange portion of the adjustment cover has a hole on the outside of the flange portion of the fixed cover. The adjustment cover is fixed to the fixed cover by passing a bolt through the hole and fastening it with a nut.

When the shaft coupling cover is large, a long hole extending in the axial direction is provided in the flange portion of the fixed cover, and a hole is provided in the flange portion of the adjustable cover at a position corresponding to the long hole. The adjustable cover is fixed to the fixed cover by passing a bolt through the long hole and the hole and fastening them together with a nut.

As described above, in the shaft coupling cover of the present invention, at least one set of bolts and nuts is required to fix the adjustable cover to the fixed cover and adjust the length in the axial direction. As a result, in a pump device equipped with the shaft coupling cover of the present invention, the assembly work efficiency and workability can be improved.

A bearing box support for supporting the pump body is provided on the prime mover side of the pump body. When the fixed cover is installed, the fixed cover and the bearing box support may interfere with each other. A relief portion is provided at the bottom of the base end side of the fixed cover, cut from the end on the pump body side toward the prime mover side. The relief portion is provided to avoid interference between the fixed cover and the bearing box support when the fixed cover is attached to the bearing cover. On the other hand, by providing the relief portion on the fixed cover, it may be possible to easily access the transmission part through the open portion, for example, when the shaft coupling cover is enlarged. According to the above configuration, the open portion is closed by the closing member, so that access to the transmission part can be prevented.

The shaft coupling cover of the present invention can minimize exposure of the transmission parts between the prime mover and the pump body while preventing an increase in the number of parts, even when the distance between the prime mover and the pump body varies.

1 is a side view of an entire pump device equipped with a shaft coupling cover according to the present invention; FIG. 2 is an exploded perspective view of the pump device of FIG. 1 . FIG. FIG. FIG. 2 is a side view of the shaft coupling cover according to the first embodiment of the present invention. 6 is a cross-sectional view taken along line VI-VI in FIG. 5 . FIG. 7 is a cross-sectional view similar to FIG. 6 of a modified example of the first embodiment. FIG. 6 is a side view of a shaft coupling cover according to a second embodiment of the present invention. 9 is a cross-sectional view taken along line IX-IX in FIG. 8 . 1. FIG. 4 is an enlarged view of a portion Y of FIG. 1 of a pump device including a shaft coupling cover according to a third embodiment of the present invention. FIG. 11 is a perspective view of a fixed cover according to a third embodiment of the present invention. 11 is a view of the fixed cover, the bearing cover, and the closing member of FIG. 10 as viewed from the pump body. FIG. 10 is a perspective view of a closing member according to a third embodiment of the present invention;

Next, an embodiment of the shaft coupling cover 1 according to the present invention will be described in detail with reference to the attached drawings.

In Figures 2 to 4, the symbol X indicates the axis of the main shafts 2a and 3a of the prime mover 2 and the pump body 3.

First Embodiment
FIG. 1 shows a side view of a pump device 4 equipped with a coupling cover 1 according to the present invention. The pump device 4 includes a prime mover 2, a pump body 3, a coupling 5, and a coupling cover 1. The prime mover 2 may be, for example, an electric motor. The prime mover 2 and the pump body 3 are installed on a common base 6. A main shaft (prime mover shaft) 2a of the prime mover 2 and a main shaft (pump shaft) 3a of the pump body 3 are connected on the axis X by a coupling 5 provided between the prime mover 2 and the pump body 3. The coupling cover 1 is provided so as to cover the coupling 5 and the exposed parts of the main shafts 2a and 3a (i.e., the transmission part). In addition, in the direction of the axis X, the pump body 3 side of the fixed cover 7 and the adjustment cover 8 is represented as a base end (base end side), and the prime mover 2 side is represented as a tip end (tip end side).

Referring also to FIG. 2, the shaft coupling cover 1 comprises a fixed cover 7 and an adjustable cover 8. As described below, the fixed cover 7 is arranged so as to cover almost the entire circumference of the bearing cover 3b of the pump body 3 from the outside, and the base end of the fixed cover 7 is fixed to the bearing cover 3b by fastening it with a pair of bolts 7a and washers 7b. The adjustable cover 8 is arranged so as to cover the tip end of the fixed cover 7 and the part of the transmission part exposed from the fixed cover 7 from the outside, and is fixed to the fixed cover 7 using a pair of bolts 8a, washers 8b, and nuts 8c.

Figure 3 is a perspective view of the fixed cover 7. The fixed cover 7 has a cylindrical fixed cover body 7c extending along the axis X. In this embodiment, the cross-sectional shape of the fixed cover body 7c perpendicular to the axis X is circular. The cross-sectional shape of the fixed cover body 7c perpendicular to the axis X may be a polygon, such as a rectangle.

The base end of the fixed cover 7 is provided with a bolt hole 7d and a notch 7e through which a bolt for fixing to the bearing cover 3b passes. In this embodiment, one bolt hole 7d and two notches 7e are provided at positions 120 degrees apart from each other around the axis X. The fixed cover 7 can be fixed by fastening the one bolt hole 7d and the two notches 7e to the bearing cover 3b using bolts. In addition, by providing two protrusions on the bearing cover 3b and fitting the notches 7e into the protrusions, the rotational movement of the fixed cover 7 around the axis X can be restricted, and in that state, the fixed cover 7 can be fixed by passing the bolt 7a through the bolt hole 7d. That is, two protrusions having a shape corresponding to the shape of the notches 7e of the bearing cover 3b can be provided at positions corresponding to the two notches 7e of the bearing cover 3b, and the notches 7e can be fitted into the protrusions to fix the fixed cover 7 to the bearing cover 3b. The positions and numbers of the bolt holes 7d and the notches 7e may be adjusted as appropriate to suit the fixing method of the fixed cover 7. Also, only the bolt holes 7d or only the notches 7e may be provided.

Referring also to FIG. 5, the fixed cover 7 has a slit portion 7f that divides the fixed cover body 7c parallel to the axis X (longitudinal direction), and a pair of flange portions 7g that protrude outward from the fixed cover body 7c by a length La so as to face the slit portion 7f.

In this embodiment, the length of the pair of flange portions 7g of the fixed cover 7 in the direction of the axis X is approximately half the length of the fixed cover main body 7c in the direction of the axis X. The pair of flange portions 7g may be formed over the entire length of the fixed cover main body 7c.

Figure 4 is a perspective view of the adjustment cover 8. The adjustment cover 8 includes a cylindrical adjustment cover body 8d extending along the axis X. In this embodiment, the cross-sectional shape of the adjustment cover body 8d perpendicular to the axis X is circular. Preferably, the cross-sectional shape of the adjustment cover body 8d perpendicular to the axis X is the same as the cross-sectional shape of the fixed cover body 7c perpendicular to the axis X. That is, preferably, when the cross-sectional shape of the fixed cover body 7c perpendicular to the axis X is circular, the cross-sectional shape of the adjustment cover body 8d perpendicular to the axis X is also circular, and when the cross-sectional shape of the fixed cover body 7c perpendicular to the axis X is a polygon such as a rectangle, the cross-sectional shape of the adjustment cover body 8d perpendicular to the axis X is also a polygon such as a rectangle.

In this embodiment, as described below, the adjustment cover 8 is arranged to cover the fixed cover 7 from the outside. Therefore, the inner diameter of the adjustment cover main body 8d is formed to be equal to or slightly larger than the outer diameter of the fixed cover main body 7c.

Referring also to FIG. 5, the adjustment cover 8 has a slit portion 8e that divides the adjustment cover main body 8d parallel to the axis X (longitudinal direction), and a pair of flange portions 8f that protrude outward from the adjustment cover main body 8d by a length Lb so as to face the slit portion 8e. A bolt hole 8g for passing the bolt 8a is provided on the base end side of the pair of flange portions 8f. Two or more bolt holes may be provided, for example, by providing another bolt hole on the tip side.

Referring also to FIG. 6, as described below, the adjustable cover 8 is fixed to the fixed cover 7 by the pair of flange portions 8f of the adjustable cover 8 clamping the pair of flange portions 7g of the fixed cover 7. The pair of flange portions 8f of the adjustable cover 8 clamp the pair of flange portions 7g of the fixed cover 7 by fastening the pair of flange portions 8f of the adjustable cover 8 with bolts 8a and nuts 8c. Therefore, the length Lb of the pair of flange portions 8f of the adjustable cover 8 is longer than the length La of the pair of flange portions 7g of the fixed cover 7, and the position of the bolt hole 8g is set so that the bolt 8a can pass outside the flange portions 7g of the fixed cover 7.

In this embodiment, the length of the pair of flange portions 8f of the adjustment cover 8 in the axial direction is approximately 1/3 of the length of the adjustment cover main body 8d in the axial direction. The pair of flange portions 8f may be formed over the entire length of the adjustment cover main body 8d.

The adjustment cover body 8d has multiple oval holes 8H. Therefore, even when the shaft coupling cover 1 is installed, the inside of the shaft coupling cover 1, specifically the shaft coupling 5, can be visually confirmed. The shape of the holes 8H may be circular or rectangular.

The fixed cover 7 and the adjustable cover 8 can each be formed, for example, by punching and bending a single steel plate.

1 and 2, in this embodiment, the fixed cover 7 is arranged so that its base end covers approximately the entire circumference of the bearing cover 3b and at least a part of the pump main shaft 3a from the outside. The fixed cover 7 is fixed by inserting and fastening the bolt 7a into the top of the bearing cover 3b through the washer 7b and the bolt hole 7d. That is, the fixed cover 7 is fixed so that the bolt hole 7d is arranged at the top and the pair of flange parts 7g is arranged at the bottom. Similarly to the fixed cover 7, the adjustment cover 8 is fixed so that the pair of flange parts 8f is arranged at the bottom and covers the tip part of the fixed cover 7 from the outside (so that it protrudes from the tip side of the fixed cover 7 toward the prime mover 2). Therefore, the shaft coupling cover 1 is fixed in a cantilever state with the fixed part to the bearing cover 3b as a support point. In order to prevent the bolts 7a and 8a from loosening due to vibration transmitted from the pump body 3, a cushioning material or the like may be sandwiched at the part where the fixed cover 7 and the bearing cover 3b contact each other to reduce the vibration transmitted to the fixed cover 7.

Referring to Figures 5 and 6 together, a method for fixing the adjustment cover 8 to the fixed cover 7 will be described.

The adjustable cover 8 is fixed to the fixed cover 7 by fastening a bolt 8a and a nut 8c through the bolt hole 8g and the washer 8b, and the pair of flange portions 8f of the adjustable cover 8 clamps the pair of flange portions 7g of the fixed cover 7.

In other words, in the shaft coupling cover 1 of this embodiment, the adjustment cover 8 is fixed only by clamping the pair of flange portions 7g of the fixed cover 7. Therefore, in order to fix the adjustment cover 8 to the fixed cover 7, it is sufficient that the respective flange portions 7g, 8f overlap in the axial direction of the shaft coupling cover 7. Therefore, as long as the flange portion 7g of the fixed cover 7 and the flange portion 8f of the adjustment cover 8 are in a position where they overlap, the fixing position of the adjustment cover 8 in the axial direction of the shaft coupling cover 7 can be adjusted as desired. In other words, since the flange portion 7a of the fixed cover 7 extends in the axial direction of the shaft coupling cover 7, the adjustment cover 8 is fixed to the fixed cover 7 so that its position can be adjusted in the axial direction of the prime mover shaft 2a, and the length of the shaft coupling cover 1 in the axial direction of the shaft coupling cover 1 can be adjusted as desired.

With this configuration, the length of the shaft coupling cover 1 in the axial X direction can be adjusted to match the distance between the pump body 3 and the prime mover 2, so that the shaft coupling cover 1 can adjust the exposure of each main shaft 2a, 3a and the shaft coupling 5 to a minimum. Furthermore, even if the distance L (see Figure 1) between the pump body 3 and the prime mover 2 is different, the same shaft coupling cover 1 can be used.

In addition, because the shaft coupling cover 1 is fixed to the pump body 3 via the bearing cover 3b, the shaft coupling cover 1 can be fixed without the need for parts such as legs that support it vertically. This helps prevent an increase in the number of parts.

As described above, the shaft coupling cover 1 of the present invention can minimize exposure of the transmission parts between the prime mover 2 and the pump body 3 while suppressing an increase in the number of parts, even when the distance L between the prime mover 2 and the pump body 3 is different.

In this embodiment, the fixed cover 7 and the adjustable cover 8 each have only one slit portion 7f, 8e, but they may each have two or more. For example, one modified example is shown in FIG. 7. In the modified example shown in FIG. 7, the fixed cover 7 and the adjustable cover 8 each have two slit portions 7f, 8e and two pairs of flange portions 7g, 7f that protrude outward to face the slit portions 7f, 8e. In this configuration, the fixed cover main body 7c and the adjustable cover main body 8d are each divided into two, and are fixed by fastening two sets of bolts 8a, washers 8b, and nuts 8c, respectively.

The second and third embodiments of the present invention will be described below. These embodiments are similar to the first embodiment described above unless otherwise noted. In addition, in the drawings relating to these embodiments, elements that are the same as those in the first embodiment are given the same reference numerals as those in the first embodiment.

Second Embodiment
8 and 9, the protruding length Lc of the pair of flange portions 7g of the fixed cover 7 is set so that the radial protruding ends of the pair of flange portions 7g of the fixed cover 7 are approximately in the same position as the radial protruding ends of the pair of flange portions 8f of the adjustment cover 8. In other words, the protruding length Lb of the pair of flange portions 8f of the adjustment cover 8 and the protruding length Lc of the pair of flange portions 7g of the fixed cover 7 are approximately equal. Furthermore, the pair of flange portions 7g of the fixed cover 7 have through holes 7h formed along the axis X direction at positions overlapping with the bolt holes 8g of the pair of flange portions 8f of the adjustment cover 8.

The through holes 7h of the pair of flanges 7g of the fixed cover 7 and the bolt holes 8g of the pair of flanges 8f of the adjustable cover 8 overlap in a predetermined area. In this state, the position of the adjustable cover 8 in the axial direction X can be fixed by inserting a bolt 8a through a washer 8b into the through hole 7h and the bolt hole 8g and tightening them together with a nut 8c.

In this embodiment, the pair of flange portions 8f of the adjustment cover 8 clamp the pair of flange portions 7g of the fixed cover 7 over a wider area. In other words, the pair of flange portions 8f of the adjustment cover 8 and the pair of flange portions 7g of the fixed cover 7 are in contact with each other over a wider area compared to the first embodiment. Therefore, the adjustment cover 8 can be more firmly fixed to the fixed cover 7. The shaft coupling cover 1 according to this embodiment can be used when it becomes necessary to fix the adjustment cover 8 more firmly, for example, due to an increase in the size of the shaft coupling cover 1.

Third Embodiment
Referring to Fig. 10, a bearing housing support 10 for supporting the pump body 3 is provided on the side of the pump body 3 facing the prime mover 2 (see Fig. 1). When the fixed cover 7 is installed, the fixed cover 7 and the bearing housing support 10 may interfere with each other. Referring also to Fig. 11, a relief portion 7i is provided at the lower part of the base end side of the fixed cover 7, which is cut from the end of the pump body 3 side toward the prime mover 2 side. The relief portion 7i is provided to avoid interference between the fixed cover 7 and the bearing housing support 10 when the fixed cover 7 is attached to the bearing cover 3b. In addition, a pair of cutout portions 7j formed from the end of the base end side on both sides of the relief portion 7i as viewed from the axis X direction are provided at the base end of the fixed cover 7. The vertical height of each of the pair of cutout portions 7j is approximately aligned with the lower end of the bearing cover 3b.

Referring to Figures 12 and 13, the shaft coupling cover 1 is provided with a closing member 11 in the relief portion 7i of the fixed cover 7.

The closing member 11 includes a base plate 11a, a pair of fixed plates 11b, and a closing plate 11c. The outer shape of the bearing cover 3b as viewed from the axis X direction is a shape of a circle with a part (lower part) cut out. Therefore, when the fixed cover 7 is fixed to the bearing cover 3b, an open part A (see the parallel hatched part in FIG. 11) is formed at the lower part of the bearing cover 3b, which allows access to the inside (transmission part) from the outside of the fixed cover through the relief part 7i. The closing member 11 is attached to the base end side of the fixed cover 7 so as to close the open part A. That is, the base plate 11a extends from one of the pair of cut parts 7j to the other, and is arranged so that the upper surface of the base plate 11a contacts the lower surface of the bearing cover 3b. The closing plate 11c extends downward from the end of the base plate 11a on the motor 2 side so as to face the bearing cover 3b, and the shape of the closing plate 11c is approximately the same as the shape of the open portion A formed at the lower part of the bearing cover 3b by the fixed cover 7 and the bearing cover 3b. The end of the base plate 11a on the pump body 3 side is approximately aligned with the end of the fixed cover 7 on the pump body 3 side in the axial direction X. The end of the base plate 11a on the motor 2 side is approximately aligned with the end of the relief portion 7i on the motor 2 side in the axial direction X. The pair of fixed plates 11b protrude from both side ends of the base plate 11a to the outside of the fixed cover through the notch portion 7j when viewed from the axial direction X, and extend upward along the outer surface of the fixed cover 7. The pair of fixed plates 11b each have a bolt hole 11d at a position overlapping with the notch portion 7e of the fixed cover 7. The closing member 11 is fixed to the bearing cover 3b together with the fixed cover 7 by inserting and fastening a bolt 7a into the bolt hole 11d of the fixed plate 11b and the notch 7e of the fixed cover 7.

The provision of the relief portion 7i in the fixed cover 7 can facilitate access to the transmission part through the open portion A, for example, when the shaft coupling cover 1 is enlarged. With the above configuration, the open portion A is closed by the closing member 11, preventing access to the transmission part.

The above describes specific embodiments of the present invention and their variations, but the present invention is not limited to the above-mentioned forms and can be implemented with various modifications within the scope of the invention. For example, an appropriate combination of the contents of the individual embodiments and variations can be one embodiment of the present invention.

REFERENCE SIGNS LIST 1 Shaft coupling cover 2 Prime mover 2a Main shaft 3 Pump body 3a Main shaft 3b Bearing cover 4 Pump device 5 Shaft coupling 6 Common base 7 Fixed cover 7a Bolt 7b Washer 7c Fixed cover body 7d Bolt hole 7e Notch 7f Slit 7g Flange 7h Through hole 7i Relief 7j Cutout 8 Adjustable cover 8a Bolt 8b Washer 8c Nut 8d Adjustable cover body 8e Slit 8f Flange 8g Bolt hole 8H Hole 10 Bearing housing support 11 Closing member 11a Base plate 11b Fixed plate 11c Closing plate 11d Bolt hole

Claims (7)

a fixed cover that covers at least a portion of a pump main shaft of a transmission unit including a prime mover main shaft that is a main shaft of a prime mover that drives the pump main body and is fixed at a base end side to the pump body, a pump main shaft that is a main shaft of the pump body, and a shaft coupling that connects the prime mover main shaft and the pump main shaft;
an adjustable cover that is fixed to the fixed cover so as to be adjustable in position in the axial direction of the prime mover main shaft and that covers a portion of the transmission unit that is exposed from the fixed cover, so as to protrude from a tip side of the fixed cover towards the prime mover ,
a relief portion provided at a lower portion of the base end side of the fixed cover;
a closing member attached to a base end side of the fixed cover so as to close an open portion through which the transmission part can be accessed from the outside of the fixed cover via the relief part;
A shaft coupling cover comprising : The coupling cover according to claim 1, wherein the fixed cover is fixed to the bearing cover of the pump body. The fixed cover and the adjustable cover each include a cylindrical cover body, a slit portion provided to divide the cover body in the longitudinal direction, and a pair of flange portions provided to protrude from the cover body and face the slit portion,
The shaft coupling cover according to claim 1 or 2, wherein the pair of flange portions of the fixed cover are clamped from outside by the pair of flange portions of the adjustable cover, thereby fixing the adjustable cover to the fixed cover. an outward protruding length of the pair of flange portions of the adjustment cover is longer than an outward protruding length of the pair of flange portions of the fixed cover, and the pair of flange portions of the adjustment cover have holes on the outer side of the pair of flange portions of the fixed cover;
The shaft coupling cover according to claim 3 , wherein the adjustment cover is fixed to the fixed cover by passing a bolt through the hole and fastening it with a nut. The pair of flange portions of the fixed cover are provided with elongated holes extending in an axial direction, and the pair of flange portions of the adjustment cover are provided with holes at positions corresponding to the elongated holes,
The shaft coupling cover according to claim 3 , wherein the adjustment cover is fixed to the fixed cover by passing a bolt through the long hole and the hole and fastening them together with a nut. A coupling cover according to any one of claims 1 to 5, in which the adjustment cover is provided with a long hole for checking the inside of the cover. The pump body;
The prime mover;
The shaft coupling;
A pump device comprising: a shaft coupling cover according to any one of claims 1 to 6 .

Images