KR101762632B1 - Coupler for - Google Patents

Abstract

The present invention relates to a motor pump coupler having a structure in which a motor rotation axis and a pump rotation axis can be automatically aligned in a connection process. The motor pump coupler comprises: a locking bolt which is a cylindrical pipe and has a threaded coupling portion formed in a predetermined section of an outer circumferential surface along the longitudinal direction, and a grip portion which can be gripped by a hand or a tool formed in an adjacent section of the threaded coupling portion; and an elastic clamp including a fastening head which is a nut-shaped member coupled to an end of the locking bolt and is formed with an inner circumferential surface thread and assembled with the threaded coupling portion, and a tightening portion which is a hollow member inserted into the fastening head, has a plurality of elongated holes formed at regular intervals along the longitudinal direction, such that the width of the elongated hole is reduced by external fastening to elastically reduce the inner diameter thereof, and is formed with outer and inner diameters thereof gradually reduced toward an end thereof, and can fix the motor rotation axis and the pump rotation axis to a hollow portion of the tightening portion as the tightening portion is tightened by being inserted into an end of the locking bolt in accordance with the engagement between the fastening head and the locking bolt. As a result, the motor pump coupler can simply connect the motor rotation axis and the pump rotation axis and automatically align the motor rotation axis and the pump rotation axis at the same time as the connection process.

Description

Motor pump coupler {Coupler for}

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

The pump is generally provided with an impeller therein for fluid transfer, and a motor for rotating the impeller. Therefore, in order for the rotational kinetic energy of the motor rotary shaft to be transmitted to the pump rotary shaft, a separate coupling or bracket for connecting the rotary shaft may be provided 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, the parallelism between the motor rotation shaft and the rotation shaft upon tightening the pump rotation shaft is difficult to guarantee, and there is a problem in that the depth of rotation between the rotation shafts to be connected is not precise.

The life of the motor shaft can be shortened due to the above-mentioned problem, and the leakage of the packing due to the packing wear of the pump shaft may occur, thus necessitating frequent maintenance or repair.

Therefore, a coupling method in which the center line of the motor rotation axis and the center line of the pump rotation axis can be matched with each other is required.

As a conventional technique for solving such a problem, a registration structure of a hydraulic pump and a motor is disclosed in Korean Utility Model Registration No. 20-0206364 (published on September 15, 1999) shown in FIG.

1, the outer diameter D of the driving shaft 210 of the hydraulic pump 200 and the protrusion height H of the key 211 assembled to one side of the outer periphery of the motor 100 The bearing bracket 130 of the motor 100 and the bearing bracket 230 of the hydraulic pump 200 are provided with a coupling shaft groove 111 in which a key groove 112 is formed at the tip of the output shaft 110, And each of the shafts 110 and 210 is assembled with a spacer supporting ring 510 penetrating the center of the spacer ring 500 , It can be ensured that the rotation axis of the motor and the pump are located on the same center line with respect to each other.

In order to precisely align the motor and the pump, the bearing bracket must protrude outward from both the motor and the pump, and each of the brackets has to be formed with a coupling hole that can be coupled with a bolt. In order to separate or connect between the motor and the pump, the bolt must be loosened or tightened.

Therefore, this complicated disassembly and assembling process can be used for universal motors and pumps that are not only usable for special motors or pumps, but also can be easily connected to the motor rotation axis and pump rotation axis, A motor pump coupler is required that can be aligned.

Registration Utility Model No. 20-0206364 (Published Date: Sep. 15, 1999)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a motor and a pump that can be used for a general motor and a pump while easily connecting the motor rotation shaft and the pump rotation shaft, To provide a motor pump coupler.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a motor pump coupler according to the present invention, wherein the motor pump coupler is a cylindrical pipe having a threaded portion formed on a circumferential surface thereof along a longitudinal direction thereof, A fastening head having an inner circumferential surface thread formed therein and assembled with the threaded engagement portion, and a hollow member inserted into the fastening head, wherein the fastening head has a plurality of long holes The inner diameter of which is reduced by the outer tightening to reduce the inner diameter elastically, and the outer diameter and the inner diameter gradually decrease toward the end. When the fastening head and the lock bolt are coupled, The motor rotation shaft or the pump rotation shaft can be fixed to the hollow of the tightening part by being inserted and fastened. It consists of a resilient clamp.

Preferably, the threaded portions of the locking bolts are formed on both sides of the grip portion, two elastic clamps are provided, one of the elastic clamps is coupled to one of the threaded portions, and one of the two elastic clamps is connected to the motor rotation shaft And the other elastic clamp is engaged with the pump rotary shaft, so that the motor rotary shaft and the pump rotary shaft are fixedly connected.

Preferably, the threaded portions on both sides of the lock bolt are formed opposite to each other in the thread direction, and the two elastic clamps are formed such that the inner periphery threads of the clamping heads are formed opposite to each other, By rotating the grip portion in one direction, both the lock bolt and the threaded portion on both sides of the lock bolt can be engaged at the same time.

In addition, the direction in which the grip portion is rotated to couple the locking bolt with the elastic clamp, and the rotational directions of the motor rotation shaft and the pump rotation shaft respectively coupled to the two elastic clamps are opposite to each other.

Preferably, the inner diameter of the locking bolt gradually decreases from the end to the center.

Particularly preferably, the reduction rate of the inner diameter of the lock bolt agrees with the reduction rate of the outer diameter of the tightening portion in a state where the tightening portion is elastically contracted and the motor rotation shaft or the pump rotation axis is fixed in the tightening portion.

On the other hand, the pump rotation shaft is inserted into the front surface of the motor, so that the inner rotor of the motor directly rotates the pump rotation shaft to drive the pump. The lock bolt has a threaded portion formed on one side of the grip portion, And the other side of the gripping part is assembled with the bearing and is rotated together, and one elastic clamp is provided, and the other end of the gripping part is fixed to the bearing, The fastening head constituting the clamp is engaged with the screw coupling part and the fastening part inserted into the fastening head is engaged with the pump rotary shaft so that the locking bolt and the elastic clamp are rotated together with the pump rotary shaft.

The motor pump coupler according to the present invention can be used for a general-purpose motor and a pump, but also has an effect that the motor rotation axis and the pump rotation axis can be easily aligned while simultaneously connecting the motor rotation axis and the pump rotation axis.

1 is a cross-sectional side view of the prior art,
2 is an assembled side view of the first embodiment of the present invention,
Figure 3 is an exploded view of Figure 2,
4 is a side sectional view of the elastic clamp,
5 is a side view of the locking bolt according to the first embodiment,
6a to 7b are coupling conceptual diagrams according to an embodiment of the locking bolt internal shape,
8 is a perspective view showing the relationship between the rotation direction of the locking bolt and the coupling direction,
9 is an assembled side view of a second embodiment of the present invention,
FIG. 10 is an exploded view of FIG. 9,

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

The present invention can be expressed in two embodiments as a device for aligning the axis between the motor 10 and the pump 20 while coupling the rotation axis for power transmission between the motor 10 and the pump 20. Therefore, common features of the two embodiments will be briefly described, and each embodiment will be described below.

The motor pump coupler according to the present invention is composed of the locking bolts 100 and 150 and the elastic clamp 200 in both of FIGS. 2 to 8 and FIGS. 9 to 11 in common.

The lock bolts 100 and 150 are cylindrical tubes and have threaded portions 120 and 170 formed in a predetermined interval along the longitudinal direction of the threaded portion 120 and 170. The gripped portions 110 and 160 Is formed.

The elastic clamp 200 includes a fastening head 220 having an inner circumferential surface thread 221 formed in the shape of a nut to be engaged with an end portion of the locking bolts 100 and 150 and assembled with the threaded portions 120 and 170, A plurality of long holes 211 and 212 formed along the longitudinal direction are radially arranged at regular intervals along the circumferential direction and the widths of the long holes 211 and 212 are reduced by external tightening so that the inner diameter is elastically reduced, The tightening portion 210 is inserted into the end portions of the locking bolts 100 and 150 and tightened by the coupling of the tightening head 220 and the locking bolts 100 and 150. The tightening portions 210 and 210 are formed to be gradually reduced in outer diameter and inner diameter. So that the motor rotary shaft 11 or the pump rotary shaft 21 can be fixed to the hollow of the tightening portion 210.

That is, the motor rotation shaft 11 or the pump rotation shaft 21 is finally fixed to the throttle portion 210 while being inserted into the throttle portion 210. When the motor rotation shaft 11 is rotated, The head 220 and the locking bolts 100 and 150 coupled to the fastening head 220 are rotated together. At this time, in a state where the locking bolts 100 and 150 and the elastic clamp 200 are engaged, as shown in FIG. 3, both the center line of the locking bolt and the center line of the elastic clamp are aligned with each other as the center line C, (11) or the pump rotating shaft (21) are arranged on the center line (C) passing through the centers of the locking bolts (100, 150). Accordingly, the power transmission between the motor 10 and the pump 20 is automatically aligned with one center line while the connection between the motor 10 and the pump 20 is established for power transmission.

In the following, two embodiments will be described in order.

≪ Embodiment 1 >

2, the locking bolt 100 is formed with threaded portions 120 on both sides of the gripping portion 110, and the elastic clamp 200 is formed on both sides of the threaded portion 120 Two of which are coupled to both sides of the lock bolt 100, one by one.

As described above, the elastic clamp 200 includes a fastening head 220 and a tightening part 210 inserted into the fastening head 220. The fastening part 210 has two ends And the cross-sectional diameter is gradually decreased. Accordingly, when the throttle portion 210 is pressed from the outside, the both ends of the throttle portion 210 are elastically contracted and the outer circumferential surface of the motor or the pump rotation shafts 11 and 21 is pressed to be engaged.

 4, a circular bottleneck section 213 is formed at a predetermined position on the outer circumferential surface of the tightening section 210 and a locking protrusion 222 is formed on the inner circumferential surface of the tightening head 220 to protrude from the locking protrusion 222 The engagement of the tightening head 220 and the tightening portion 210 can be maintained even if the tightening portion 210 inserted into the tightening head 220 is contracted.

3, an elastic clamp 200 coupled to both ends of the lock bolt 100, a motor rotation shaft 11 coupled to the elastic clamp 200, and a pump rotation shaft 21 are arranged on a straight line which is a straight line, when the motor 10 and the pump 20 are coupled by the coupler according to the present invention, the motor rotation axis 11 and the pump rotation axis 21 are aligned automatically . Therefore, in addition to the work or means for connecting the motor 10 and the pump 20, there is no need for a mechanism for aligning the motor 10 and the pump 20, and no separate sorting operation is required.

In this case, in order to connect the motor 10 and the pump 20 with the coupler according to the present invention, first, the rotary shaft of either the pump or the motor is inserted into one of the two elastic clamps 200, The rotary shaft of either the motor 10 or the pump 20 is fixed together with the locking bolt 100 by screwing one end of the motor 100 and the elastic clamp 200 together. The rotary shaft of the other 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 clamp 200 is screwed to the other end of the lock bolt 100 . As a result, the alignment of the motor rotary shaft 11 and the pump rotary shaft 21 is completed simultaneously with the coupling by only two screw connections.

As shown in FIG. 8, the threaded portions 120 on both sides of the grip 110 are formed symmetrically with respect to the grip 110. Therefore, if there is a nut to be coupled in the right-hand screw direction from the one side in the absence of the gripper 110, if the rotation direction is changed after passing through the section where the gripper is present, the nut can be completely released to the opposite end.

The inner thread 221 of the clamping head 220 constituting the elastic clamp 200 can be freely moved to both sides of the gripper 110, It is possible to connect them to any one of them.

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

In this case, what is important in FIG. 8 is the relationship between the rotational direction of the motor rotary shaft 11 and the rotational direction when engaging the respective screw threads.

Since the elastic clamp 200 and the lock bolt 100 are screwed to each other, there is a possibility that the screw connection is loosened while the motor rotating shaft 11 and the pump rotating shaft 21 are rotated, And the pump rotation shaft 21 can also be slightly deviated from each other. If the coupling between the elastic clamp 200 and the locking bolt 100 is loosened during the use of the motor 10 and the pump 20, the coupling between the elastic clamp 200 and the locking bolt 100 is checked and re- It may take time and effort to maintain.

8, when the rotation direction of the motor rotation shaft is the A direction, when the lock bolt 100 is stopped, the elastic clamp 200 positioned on the left side in FIG. 8 is coupled to the lock bolt 100 Is also formed in the A direction. That is, the rotation direction of the motor rotation shaft 11 and the rotation direction of the elastic clamp 200 when the elastic clamp 200 inserted with the motor rotation axis 11 is coupled to the lock bolt 100 are formed to be equal to each other.

Because the pump rotation shaft 21 is connected to the pump inner impeller when the rotation of the motor rotation shaft 11 is started, the impeller (not shown) and the impeller The pump rotation shaft 21 connected to the impeller and the lock bolt 100 connected to the pump rotation shaft 21 are not rotated. Therefore, before the rotation from the impeller to the lock bolt 100, a force for rotating the lock bolt 100 in a direction to make the engagement with the lock bolt 100 becomes stronger acts on the elastic clamp 200, which rotates together with the motor rotation shaft 11, Also, the lock bolt 100 receiving this force is also subjected to a rotational force in a direction in which the coupling between the lock bolt 100 and the elastic clamp 200 connected to the pump rotational shaft 21 becomes more rigid.

However, when the rotation of the pump 20 is stopped by stopping the motor 11, the rotation does not stop immediately due to the rotation inertia force. Therefore, the inertial force equivalent to the case where the motor rotation axis 11 is changed from the stop state to the rotation state It does not work. The inner circumferential surface thread 221 of the clamping head 220 and the outer circumferential surface thread 121 of the threaded engaging portion 120 are fixed to each other so that the elastic clamp 200 and the lock bolt 100 are engaged in the same direction as the rotation direction of the motor rotary shaft 11. [ The engagement between the elastic clamp 200 and the lock bolt 100 becomes more rigid as the motor 10 and the pump 20 are used.

Meanwhile, the inside of the lock bolt 100 is formed with a hollow as shown in FIGS. 6A to 7B. 6A and 6B and FIGS. 7A and 7B may be used for the shrinkage of the tightening part 210 constituting the elastic clamp 200 in the lock bolt 100. FIG.

6A and 6B, the inner hollow of the lock bolt 100 is formed in a straight line so that the outer circumferential surface of the tightening part 210 is caught at the end of the lock bolt 100 as shown in FIG. 6A. At this time, 6A, the point P 'intersects the inside of the lock bolt 100 and the P' point moves to the inside of the lock bolt 100. In this case, The outer diameter of the point is reduced. The motor rotation shaft 11 inserted into the tightening portion 210 is tightly fixed to the inner circumferential surface of the end portion of the tightening portion 210. [

7A and 7B, the inner hollow of the lock bolt 100 is reduced toward the center of the lock bolt 100, and in this case, the inner diameter reduction ratio of the lock bolt 100 is set such that the tightening portion 210 is elastically contracted, 11 is fixed in the tightening portion 210, it is preferable to match the outer diameter reduction rate of the tightening portion 210. [

7A and 7B, as the throttle portion 210 contracts due to the external compression, the throttle portion of the throttle portion 210 decreases in size as it goes toward the end of the throttle portion 210, If the inner diameter is reduced toward the center, the inner diameter reduction rate is equal to the outer diameter reduction rate of the throttle portion 210 before the throttle portion 210 is reduced, This is because it is more advantageous for the motor shaft 11 to be firmly fixed.

6A to 7B, the outer diameter of the throttle portion 210 is reduced toward the end portion of the throttle portion 210 in the opposite direction to the direction in which the lock bolt 100 is directed, 210 and the outer circumferential surface of the motor rotating shaft 11 are fixed by being squeezed.

≪ Embodiment 2 >

In the second embodiment, as shown in Figs. 9 to 10, only one elastic clamp 200 and one screw coupling portion 170 are provided. That is, unlike the first embodiment, the locking bolt 150 is formed with a screw coupling 170 on one side only, and the opposite side end of the locking bolt 150 on which the screw coupling portion 170 is formed is rotatable . The output side of the motor 10 will be referred to as the front side of the motor 10 for reference.

The first feature of the second embodiment is that the opposite end of the locking bolt 150 in the direction toward the threaded portion 170 is the rotor 17 rotated inside the motor 10 And the rotor 17 and the lock bolt 150 are rotated together.

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

10, a bearing 190 is provided between the front surface of the rotor 17 and the opposite end of the lock bolt 150 so that the bearing 190 is engaged with the opposite end of the lock bolt 150 The lock bolt 150 is rotatably supported in the stator of the motor 10 so that the rotor 17 and the lock bolt 150 are rotated together.

The elastic clamp 200 is engaged with the threaded portion 170 formed in the direction of the pump of the locking bolt 150 and the pump rotating shaft 21 is inserted and fixed to the elastic clamp 200, 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 the length of the first embodiment. When the length of the pump rotating shaft 21 is shortened when the pump rotating shaft 21 is fixed by the locking bolt 150 and the elastic clamp 200, the straightness is further improved and the noise is remarkably reduced.

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

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

10: motor 11: motor rotating shaft
17: motor rotor 20: pump
21: pump rotating shaft 22: first adjusting bolt
23: second adjusting bolt 100, 150: locking bolt
110, 160: grip portion 120, 170:
121,171: Outer peripheral thread
190: Bearing 200: Elastic clamp
210: Zoom section 211: First slot
212: Chapter 2, Section 213: Bottleneck Section
220: fastening head 221: inner circumferential surface thread
222:

Claims (7)

1. A cylindrical tube, comprising: a locking bolt having a threaded portion formed in a predetermined interval along an outer circumferential surface thereof along a longitudinal direction thereof, and a grip portion capable of being held by a hand or a tool in an adjacent section of the threaded portion;
A fastening head having a threaded portion formed on an inner circumferential surface thereof and assembled with the threaded portion, and a hollow member inserted into the fastening head, wherein a plurality of elongated holes formed in the longitudinal direction extend in a circumferential direction And a tightening portion formed by radially arranging the outer circumferential surface of the fastening head and the outer circumferential surface of the fastening bolt, the inner circumferential surface of the fastening head and the fastening bolt And an elastic clamp capable of fixing the motor rotation shaft or the pump rotation shaft to the hollow of the throttle portion by tightening the tightening portion by being gradually inserted into the end portion of the locking bolt by being engaged with the inner circumferential surface of the end portion of the locking bolt,
Wherein one of the elastic clamps is coupled to one of the screw coupling parts, and one of the elastic clamps is coupled to the motor rotation shaft And the other elastic clamp is engaged with the pump rotation shaft, whereby the motor rotation shaft and the pump rotation shaft are fixedly connected,
The fastening head, which is coupled to each of the threaded portions formed on both sides of one of the lock bolts, has a threaded direction of the inner circumferential surface opposite to that of the fastening head, so that when the gripping portion is rotated in one direction, And are simultaneously coupled to the lock bolts,
The inner diameter of the locking bolt gradually decreases from the end to the center. The reduction rate of the inner diameter of the locking bolt agrees with the reduction rate of the outer diameter of the throttling portion when the throttle portion is elastically contracted and the motor rotation shaft or the pump rotation shaft is fixed in the throttle portion.
And the motor shaft and the pump shaft disposed on both sides of the lock bolt are rotated while being aligned with each other so as to be in coincidence with each other by rotating the grip portion. delete delete delete delete delete delete

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