WO2018080107A1

WO2018080107A1 - Motor pump coupler

Info

Publication number: WO2018080107A1
Application number: PCT/KR2017/011588
Authority: WO
Inventors: 이석형
Original assignee: 주식회사 강산산업
Priority date: 2016-10-26
Filing date: 2017-10-19
Publication date: 2018-05-03
Also published as: KR101762632B1

Abstract

The present invention relates to a motor pump coupler having a configuration in which a motor rotation axis and a pump rotation axis can be automatically aligned, particularly during a connection process. The motor pump coupler comprises a locking bolt and an elastic clamp. The locking bolt, which is a cylindrical pipe, includes: a threaded coupling portion that is formed in a predetermined section of an outer circumferential surface along the longitudinal direction; and a grip portion that is formed in an adjacent section of the threaded coupling portion and can be gripped by hand or by a tool. The elastic clamp includes: a fastening head that is a nut-shaped member coupled to an end of the locking bolt, and has an inner circumferential surface thread for assembly with the threaded coupling portion; and a tightening portion that is a hollow member inserted into the fastening head, and has a plurality of elongated holes formed at fixed intervals along the longitudinal direction, the tightening portion being formed such that the inner diameter elastically decreases as the width of the elongated holes is reduced by external tightening, and the outer and inner diameters gradually decrease toward the ends, wherein the insertion and tightening of the tightening portion in the end of the locking bolt by the coupling of the fastening head and the locking bolt enables the fixing of the motor rotation axis or the pump rotation axis to a hollow portion of the tightening portion. Therefore, the present invention is intended to provide a motor pump coupler having the effect being able to conveniently connect the motor rotation axis and the pump rotation axis, while also automatically align the motor rotation axis and the pump rotation axis at the same time as the connection process.

Description

Motor pump coupler

The present invention relates to a motor pump coupler for connecting a motor rotation shaft and a pump rotation shaft, and more particularly, to a motor pump coupler having a structure in which the motor rotation shaft and the pump rotation shaft can be automatically aligned in a connecting process.

Pumps are generally provided with impellers for fluid transfer, and motors for rotating the impellers. Therefore, in order for the rotational kinetic energy of the motor rotation shaft to be transmitted to the pump rotation shaft, a separate coupling or bracket may be installed between the motor and the pump, or both the coupling and the bracket may be installed.

However, in the conventional connection between the pump and the motor, it is difficult to guarantee the parallelism between the rotating shaft and the rotating shaft when the rotating shaft of the pump and the rotating shaft of the pump are connected.

Due to the above problem, the life of the motor shaft may be shortened, and oil leakage may occur due to the packing wear of the pump shaft, and thus a situation requiring frequent maintenance or repair may occur.

Therefore, there is a need for a coupling method in which the center line of the motor rotation shaft and the center line of the pump rotation shaft can coincide with each other.

The prior art devised to solve such a problem is the Republic of Korea Utility Model Publication No. 20-0206364 (published date: 1999. 09. 15) shown in Figure 1 includes a 'hydraulic pump and motor connection structure'.

As shown in FIG. 1, the motor 100 may be fitted with an outer diameter D of the drive shaft 210 of the hydraulic pump 200 and a protrusion height H of the key 211 assembled at one outer circumference thereof. The connecting shaft groove 111 is provided with a key groove 112 at the tip of the output shaft 110 is fitted to each other, the bearing bracket 130 of the motor 100 and the bearing bracket 230 of the hydraulic pump 200 is A connecting support hole 510 which is assembled with a fastening member such as a screw or a bolt, respectively, in the spacing ring 500 interposed therebetween, and each of the

shafts

110 and 210 passes through the center of the spacing ring 500. By being assembled in the state of the inside), it can be ensured that the rotational axes of the motor and the pump lie on the same center line with each other.

However, in the prior art, both the bearing bracket should protrude outward from the motor and the pump for precise shaft alignment of the motor and the pump, and the coupling holes that can be bolted to each bracket should be formed, and for the maintenance of the motor or the pump. In order to separate or combine the motor and the pump, a problem arises that the bolts must be loosened or tightened.

Therefore, this complex disassembly and assembly process is required or can be used for general-purpose motors and pumps that are not only available for special motors or pumps. There is a need for a motor pump coupler that can be aligned.

[Preceding technical literature]

Korean Utility Model Registration Publication No. 20-0206364 (published date: September 15, 1999)

Accordingly, the present invention is to improve the problems of the prior art, and can be used in a general-purpose motor and pump, while also easily connecting the motor rotation shaft and the pump rotation shaft, and at the same time the alignment process of the motor rotation shaft and the pump rotation shaft is made automatically To provide a motor pump coupler.

Motor pump coupler according to the present invention for achieving this object is a cylindrical tube, the screw coupling portion is formed in a certain section of the outer peripheral surface along the longitudinal direction, the gripping portion that can be gripped by a hand or a tool in the adjacent section of the screw coupling portion is formed A lock bolt, a nut-shaped member coupled to the end of the lock bolt, a threaded head of which an inner circumference is formed to assemble with the screw coupling part, and a hollow member inserted into the fastening head, and a plurality of long holes at regular intervals along the length direction. The inner diameter is elastically reduced due to the decrease in the length of the long hole by the external tightening, and the tightening portion is formed to gradually reduce the outer diameter and the inner diameter toward the end, and the tightening portion is coupled to the lock bolt end according to the coupling of the fastening head and the locking bolt. Motor shaft or pump shaft can be fixed to the hollow of tightening part by inserting and tightening It consists of a resilient clamp.

Here, preferably, the locking bolts are formed one by one on both sides of the gripping portion, and two elastic clamps are provided so that one elastic clamp is coupled to one screw coupling portion, and one of the two elastic clamps is coupled to the motor shaft. And the remaining elastic clamp is coupled to the pump shaft by the motor shaft and the pump shaft is fixedly connected.

Preferably, the screw coupling portions on both sides of the locking bolt are formed in opposite directions to each other, and the two elastic clamps are formed to have opposite threads on the inner circumferential surface of the fastening head. By rotating in one direction, both the locking bolt and the screw coupling portion of both sides of the locking bolt can be engaged at the same time.

In addition, the direction in which the gripping portion rotates to couple the locking bolt and the elastic clamp, and the rotation direction of the motor rotating shaft and the pump rotating shaft respectively coupled to the two elastic clamps are opposite to each other.

At this time, preferably the inner diameter of the locking bolt is gradually reduced from the end toward the center.

Particularly preferably, the reduction rate of the inner diameter of the locking bolt is equal to the reduction rate of the outer diameter of the tightening part when the tightening part is elastically contracted so that the motor rotating shaft or the pump rotating shaft is fixed inside the tightening part.

On the other hand, the front of the motor is inserted into the pump shaft, the motor inside the rotor directly rotates the pump shaft, the pump is driven, the locking bolt is formed on one side of the gripping portion screw coupling portion and the other side is assembled to the motor front, On the front side, a fixed tube having a concentric cross section surrounding the periphery of the pump shaft is attached, and a bearing is assembled to the outer peripheral surface of the fixed tube, and the other side of the grip unit is assembled with the bearing to rotate together, and one elastic clamp is provided. The fastening head constituting the elastic clamp is coupled to the screw coupling portion and the fastening portion inserted into the fastening head is coupled to the pump rotation shaft so that the locking bolt and the elastic clamp rotate together with the pump rotation shaft.

The motor pump coupler according to the present invention can be used in a general-purpose motor and pump, but also has an effect that the motor rotation shaft and the pump rotation shaft can be aligned automatically at the same time as the connection process and the motor rotation shaft and the pump rotation shaft.

1 is a side cross-sectional view of the prior art,

2 is a side view of the coupling of the first embodiment of the present invention;

3 is an exploded view of FIG.

4 is a side cross-sectional view of the elastic clamp,

5 is a side view of the locking bolt according to the first embodiment;

6a to 7b is a conceptual diagram of the coupling according to the embodiment of the internal locking bolt,

8 is a perspective view showing the relationship between the locking bolt rotation direction and the coupling direction;

9 is a side view of the coupling of the second embodiment of the present invention;

10 is an exploded view of FIG. 9;

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

The present invention is a device for aligning the shaft between the motor 10 and the pump 20 at the same time to combine the rotary shaft for power transmission between the motor 10 and the pump 20, it can be represented in two embodiments. Therefore, hereinafter, common features of the two embodiments will be briefly described, and then each embodiment will be described one by one.

The motor pump coupler according to the present invention is composed of the

locking bolts

100 and 150 and the elastic clamp 200 in common in both embodiments of FIGS. 2 to 8 and 9 to 11.

Locking bolts (100, 150) is a cylindrical tube, the screw coupling portion (120, 170) is formed in a predetermined section on the outer circumferential surface along the longitudinal direction, the

holding portion

110, 160 that can be gripped by a hand or a tool in the adjacent section of the screw coupling portion (120, 170) ) Is formed.

The elastic clamp 200 is a nut-shaped member that is coupled to the ends of the

locking bolts

100 and 150, and an inner circumferential thread 221 is formed to be assembled with the

screw coupling parts

120 and 170, and inserted into the coupling head 220. As a hollow member, a plurality of

long holes

211 and 212 are formed at regular intervals along the longitudinal direction, and the width of the

long holes

211 and 212 is reduced by external tightening, thereby decreasing the inner diameter elastically and gradually decreasing the outer diameter and the inner diameter toward the ends. Consisting of the fastening part 210, the fastening part 210 is inserted into the locking bolt (100, 150) end and tightened in accordance with the coupling of the fastening head 220 and the locking bolt (100,150) in the hollow of the fastening part 210 The motor rotating shaft 11 or the pump rotating shaft 21 can be fixed.

That is, the motor rotating shaft 11 or the pump rotating shaft 21 is fixed to the tightening unit 210 in the state of being finally inserted into the tightening unit 210, and is fastened with the tightening unit 210 as the motor rotating shaft 11 is rotated. The

locking bolts

100 and 150 coupled to the head 220 and the fastening head 220 are rotated together. At this time, as the

locking bolts

100 and 150 and the elastic clamp 200 are coupled to each other, as shown in FIG. 3, the locking bolt center lines and the elastic clamp center lines coincide with each other as the center line C, and thus, the rotation shaft of the motor is rotated by the

locking bolts

100 and 150. 11 or the pump axis of rotation 21 is arranged while being arranged on the center line (C) passing through the center of the locking bolt (100,150). Therefore, the power transmission between the motor 10 and the pump 20 is automatically aligned along one centerline while being connected for power transmission between the motor 10 and the pump 20.

Hereinafter, two embodiments will be described in sequence.

<< 제1실시예First embodiment >>

In the first embodiment, as shown in FIG. 2, the screw coupling parts 120 are formed at both sides of the gripping part 110 in the locking bolt 100, and the elastic clamp 200 is the number of the screw coupling parts 120. In accordance with the two are provided are coupled to both sides of the lock bolt 100, respectively one.

For reference, the elastic clamp 200 includes a fastening head 220 and a fastening part 210 inserted into the fastening head 220 as described above, and the fastening part 210 is provided at both ends as described below. Increasingly, the cross-sectional diameter is reduced. Therefore, when the tightening portion 210 is pressed from the outside, both ends of the tightening portion 210 are elastically reduced while pressing the outer circumferential surfaces of the motors or the

pump shafts

11 and 21 to be engaged.

Here, as shown in FIG. 4, a circular bottleneck section 213 is formed at a predetermined position of the outer circumferential surface of the tightening part 210, and a locking protrusion 222 is formed to protrude from the inner circumferential surface of the fastening head 220, and thus, the locking protrusion 222 is formed. ) Is inserted into the bottleneck section 213, the coupling of the fastening head 220 and the fastening portion 210 can be maintained even if the fastening portion 210 inserted into the fastening head 220 is contracted.

And as shown in FIG. 3, the locking bolt 100, the elastic clamp 200 is coupled to both ends of the locking bolt 100, the motor rotating shaft 11 and the pump rotating shaft coupled to the elastic clamp 200 ( Since the centers of the 21 are all disposed on one straight line, the motor 10 and the pump 20 are automatically aligned when the motor 10 and the pump 20 are coupled to the coupler according to the present invention. . Therefore, in addition to the operation or means for connecting the motor 10 and the pump 20, there is no need for an additional mechanism for the alignment of the motor 10 and the pump 20, and no separate alignment is necessary.

In this case, the operation sequence for connecting the motor 10 and the pump 20 with the coupler according to the present invention, first, the rotation shaft of any one of the pump or the motor is inserted into any one of the two elastic clamps 200 and then the locking bolt One end of the 100 is screwed with the elastic clamp 200 to fix the rotating shaft of any one of the motor 10 and the pump 20 together with the locking bolt 100. Thereafter, the rotation shaft of any one of the motor 10 and the pump 20 is inserted into the other one of the two elastic clamps 200, and then the other elastic clamps 200 are screwed to the other end of the locking bolt 100. Let's do it. As a result, the motor rotation shaft 11 and the pump rotation shaft 21 are aligned and completed simultaneously with only two screw couplings.

As shown in FIG. 8, the screw coupling parts 120 at both sides of the gripping part 110 are formed symmetrically with respect to the gripping part 110. Therefore, if there is no gripping portion 110, if there is a nut coupled to the right screw direction along the clockwise direction from one side, the direction of rotation must be changed after passing the section when there is a gripping portion so that it can escape to the completely opposite end.

If the gripping parts 110 are formed to be symmetrical to both sides of the screw coupling part 120, even if all of the threads 221 of the inner circumferential surface of the fastening head 220 constituting the elastic clamp 200 are free from any of both sides of the gripping part 110. Even when combined in one, the same can be combined.

For reference, although the combining order may be made from the left side or the right side in FIG. 8, the combining may be performed sequentially from one side.

At this time, what is important in FIG. 8 is the relationship between the rotational direction of the motor shaft 11 and the rotational direction at the time of coupling each screw coupling.

Since the elastic clamp 200 and the locking bolt 100 are screwed together, there is a risk that the screw coupling will loosen while the motor rotating shaft 11 and the pump rotating shaft 21 are rotated, and as the screw coupling is loosened, the motor rotating shaft 11 will be loosened. The alignment of the pump rotation shaft 21 with each other may be finely shifted. If the coupling of the elastic clamp 200 and the locking bolt 100 is loosened in the process of using the motor 10 and the pump 20, the coupling between the elastic clamp 200 and the locking bolt 100 should be checked and retightened in the middle of use. It may take maintenance time and effort.

Therefore, in the present invention, when the lock bolt 100 is stopped when the rotation direction of the motor shaft is in the A direction as shown in FIG. 8, the elastic clamp 200 located on the left side in FIG. 8 is connected to the lock bolt 100. The combined rotational direction is also formed in the A direction. That is, the rotation direction of the elastic clamp 200 when the rotation direction of the motor rotation shaft 11 and the elastic clamp 200 into which the motor rotation shaft 11 is inserted is coupled to the lock bolt 100 is formed to be the same.

Because, when the rotation of the motor rotating shaft 11 is started, the pump rotating shaft 21 is connected to the internal impeller of the pump, so the impeller (not shown) and the impeller (not shown) may be stopped until the rotational force of the motor rotating shaft 11 becomes greater than a predetermined size. This is because the pump rotating shaft 21 connected to the impeller and the locking bolt 100 connected to the pump rotating shaft 21 are not rotated. Therefore, before being rotated from the impeller to the locking bolt 100, the force to be rotated in the direction in which the coupling with the locking bolt 100 becomes harder acts on the elastic clamp 200 that is rotated together with the motor rotating shaft 11. In addition, the locking bolt 100 receives such a force, the rotational force acts in a direction in which the coupling between the locking bolt 100 and the elastic clamp 200 connected to the pump rotation shaft 21 is more rigid.

However, when the motor 11 is stopped to stop the rotation of the pump 20, the rotation does not stop immediately due to the rotational inertia force, so that the inertia force as much as the motor rotation shaft 11 changes from the stopped state to the rotation state is It doesn't work. Therefore, the inner circumferential surface thread 221 of the fastening head 220 and the outer circumferential surface thread 121 of the screw coupling part 120 so that the elastic clamp 200 and the locking bolt 100 are coupled in the same direction as the rotational direction of the motor rotating shaft 11. When the motor 10 and the pump 20 are used, the coupling between the elastic clamp 200 and the locking bolt 100 becomes harder, thereby eliminating the need for maintenance in the middle of use.

On the other hand, the inside of the lock bolt 100 is hollow as shown in Figure 6a to 7b. In this case, the fastening part 210 forming the elastic clamp 200 may be contracted in the lock bolt 100, and may have two types as shown in FIGS. 6A and 6B and 7A and 7B.

6A and 6B, the hollow inside the lock bolt 100 is formed in a straight line, and the outer circumferential surface of the tightening unit 210 is caught at the end of the lock bolt 100 as shown in FIG. 6A, wherein the outer circumferential surface of the tightening unit 210 and the lock bolt are fixed. (100) If the point where the inner end meets P as shown in Fig. 6a and the outer peripheral surface of the tightening part at P point is P ', P' point enters into the locking bolt 100 while P 'is engaged as shown in Fig. 6b. The outer diameter of the point is reduced. Therefore, the motor rotating shaft 11 inserted into the tightening unit 210 is tightly fixed to the inner peripheral surface of the end of the tightening unit 210.

7A and 7B, the hollow inside the lock bolt 100 decreases toward the center of the lock bolt 100, and in this case, the reduction ratio of the inner diameter of the lock bolt 100 is elastically contracted by the tightening unit 210. It is preferable that the rotation shaft 11 coincides with the outer diameter reduction rate of the tightening unit 210 in a state fixed in the tightening unit 210.

Because, as can be seen in the comparison of Figure 7a and 7b tightening portion 210 when the contraction to the external compression tightening portion 210 toward the end of the tightening portion 210 as the shrinkage ratio of the outer diameter is reduced further increases the locking bolt 100 If the inner diameter decreases toward the center, the inner diameter reduction rate is smaller than the outer diameter reduction rate of the tightening part 210 after the tightening part 210 is reduced, rather than matching the outer diameter decreasing rate of the tightening part 210 before the tightening part 210 is reduced. This is because the coincidence is more advantageous for the firm fixing of the motor rotating shaft 11.

In this case, the opposite direction to the direction toward the locking bolt 100 from both sides of the tightening portion 210 as shown in Figures 6a to 7b also toward the end of the tightening portion 210 outer diameter is reduced, tightening portion 210 The inner circumferential surface of the end and the outer circumferential surface of the motor rotating shaft 11 are fixed while being compressed.

<< 제2실시예Second embodiment >>

In the second embodiment, as shown in FIGS. 9 to 10, only one elastic clamp 200 and one screw coupling unit 170 are provided. In other words, unlike the first embodiment, the locking bolt 150 has a screw coupling 170 formed on one side thereof, and the opposite end portion of the locking bolt 150 formed with the screw coupling 170 is rotatable on the output side of the motor 10. To be assembled. For reference, the output side of the motor 10 will be referred to as the front of the motor 10.

As shown in the exploded view of FIG. 10, the first characteristic of the second embodiment is a rotor 17 which is rotated inside the motor 10 immediately opposite the end of the locking bolt 150 toward the screw 170. Is coupled to the front is that the rotor 17 and the locking bolt 150 is rotated together.

The second feature of the second embodiment is that the motor shaft 11 is removed. Accordingly, the pump 10 is driven by the pump rotation shaft 21 inserted into the center of the front face of the motor 10 and the motor rotor 17 by rotating the pump rotation shaft 21 in the motor 10 and the pump 20.

At this time, as shown in FIG. 10, a bearing 190 is provided between the front of the rotor 17 and the opposite end of the locking bolt 150 so that the bearing 190 is located at the opposite end of the locking bolt 150. The rotor 17 and the locking bolt 150 rotate together by being coupled to the locking bolt 150 so as to be rotatably supported in the stator (not shown) of the motor 10.

Here, the elastic clamp 200 is coupled to the screw coupling portion 170 formed in the pump-side direction of the locking bolt 150, and the pump rotating shaft 21 is inserted into and fixed to the elastic clamp 200 to thereby rotate the motor rotor 17. The rotation of the pump 20 is driven.

In this case, in the second embodiment, it is preferable to shorten the length of the pump rotating shaft 21 to less than half as compared with the first embodiment. When the pump rotation shaft 21 is formed to have a short length of the pump rotation shaft 21 when the pump rotation shaft 21 is fixed by the locking bolt 150 and the elastic clamp 200, the straightness is further improved and noise is significantly reduced.

Therefore, in the second embodiment, even though there is only one elastic clamp 200, the shaft 10 is simply coupled while being axially aligned between the motor 10 and the pump 20.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

[Description of the code]

10 motor 11 motor shaft

17: motor rotor 20: pump

21: rotation axis of the pump 22: the first adjustment bolt

23: second adjustment bolt 100,150: locking bolt

110,160 grip part 120,170 screw connection part

121,171: Outer surface thread

190: bearing 200: elastic clamp

210: Fastener 211: Chapter 1

212: Chapter II 213: Bottlenecks

220: fastening head 221: inner peripheral surface thread

222: jamming projection

Claims

A cylindrical tube, comprising: a locking bolt having a screw coupling portion formed in a predetermined section on an outer circumferential surface along a longitudinal direction, and a holding portion which can be gripped by a hand or a tool in an adjacent section of the screw coupling portion;

As a nut-shaped member coupled to the lock bolt end, an inner circumferential surface thread is formed, and a plurality of long holes are formed at regular intervals along a longitudinal direction as a fastening head assembled with the screw coupling portion and a hollow member inserted into the fastening head. As the length of the hole is reduced by tightening, the inner diameter is elastically reduced and the tightening part is formed to gradually reduce the outer diameter and the inner diameter toward the end, and the tightening part is inserted into the locking bolt end and tightened according to the coupling of the fastening head and the locking bolt. An elastic clamp capable of fixing the motor shaft or the pump shaft in the hollow of the tightening part;

Motor pump coupler consisting of.
The method of claim 1,

In the locking bolt, the screw coupling portion is formed on both sides of the gripping portion, and two elastic clamps are provided so that one elastic clamp is coupled to one screw coupling portion, and one of the two elastic clamps is coupled to the motor rotating shaft and the remaining elastic The clamp is coupled to the pump rotation shaft motor motor coupler, characterized in that the motor shaft and the pump shaft is fixedly connected.
The method of claim 2,

The screw coupling portions on both sides of the locking bolt are formed to be symmetrical with respect to the gripping portion, and each of the fastening head inner circumferential threads of the fastening head are coupled to both sides of the locking bolt.
The method of claim 3,

And a rotation direction of the elastic clamp when the elastic clamp into which the motor rotary shaft is inserted is locked to the locking bolt.
The method of claim 1,

The inner diameter of the locking bolt is characterized in that the motor pump coupler is gradually reduced from the end toward the center.
The method of claim 5,

The reduction ratio of the inner diameter of the lock bolt is a motor pump coupler, characterized in that the tightening portion is elastically contracted to match the reduction rate of the outer diameter of the tightening part in a state in which the motor shaft or the pump rotation shaft is fixed inside the tightening portion.
The method of claim 1,

The pump rotation shaft is inserted into the front of the motor, the motor inside the rotor to directly rotate the pump rotation shaft to drive the pump,

The locking bolt is a screw coupling portion is formed on one side of the gripping portion and the other side is assembled to the motor rotor to generate rotational kinetic energy inside the motor is rotated together by rotating the motor rotor,

The elastic clamp is provided with one, the fastening head constituting the elastic clamp is coupled to the screw coupling portion and the fastening portion inserted into the fastening head is coupled to the pump shaft, characterized in that the locking bolt and the elastic clamp is rotated together with the pump shaft Motor pump coupler.