JP2018040343A - Electric-motor-directly-coupled type fluid-pressure pumping system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric-motor-directly-coupled type fluid-pressure pumping system which enables a fluid-pressure pump to be directly coupled to a standard electric motor of an electric motor manufacturer who does not perform working for an output shaft, and which makes restrictions hardly imposed on replacement by another standard electric motor for various purposes.SOLUTION: An electric-motor-directly-coupled type fluid-pressure pumping system includes an electric motor 1 that protrudes a rotatable output shaft 5 to the side of one axial end, and a fluid-pressure pump 9 that sucks in and discharges a fluid by rotary drive of an input shaft 10 protruding to the side of the one axial end. In the input shaft 10 of the fluid-pressure pump 9, a shaft end facing the output shaft 5 has an insertion hole 10D and a key groove 10E, into which the output shaft 5 and a key 5A are to be inserted. The electric motor 1 and the fluid-pressure pump 9 are connected together so that the input shaft 10 can be rotatively driven by the output shaft 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric motor direct connection type hydraulic pump apparatus in which a hydraulic pump and an electric motor are directly connected.

  In this type of motor-direct-coupled hydraulic pump device, a concave portion is formed on one end surface of the flange member of the motor, a convex portion is formed on one end surface of the casing of the hydraulic pump, and a liquid is formed on the concave portion of the flange member of the motor. The convex part of the casing of the pressure pump is fitted with a wire, and the electric motor and the hydraulic pump are fastened by a plurality of bolt members and directly connected. The output shaft of the motor is recessed from the shaft end to form an insertion hole and key groove, and the input shaft and key of the hydraulic pump are inserted into the insertion hole and key groove of the motor shaft to increase the rotational driving force of the motor. It is transmitted to the hydraulic pump.

Utility Model Registration No. 2559226

  However, such a conventional electric motor direct-coupled hydraulic pump device requires a dedicated electric motor in which an insertion hole and a key groove for inserting the input shaft and key of the hydraulic pump are formed on the output shaft of the electric motor. In order to change the motor, a dedicated electric motor is required, so that there is a problem that the replacement of the electric motor is restricted.

  The problem of the present invention is that the hydraulic pump can be directly connected to a standard motor of an electric motor manufacturer that does not process the output shaft, and the motor direct-coupled liquid that is not easily restricted by the replacement of other standard motors according to various purposes. A pressure pump device is provided.

In order to achieve this problem, the present invention has taken the following measures. That is,
An electric motor that projects a rotatable output shaft toward one end in the axial direction, and a hydraulic pump that sucks and discharges fluid by the rotational drive of the input shaft that projects toward one end in the axial direction. The input shaft of the hydraulic pump is an output shaft Directly connected to the motor, characterized in that it has an insertion hole for inserting the output shaft and the key at the shaft end facing the key and a key groove, and the motor and the hydraulic pump are connected so as to rotationally drive the input shaft by the output shaft That is the form hydraulic pump device.

  In this case, a spacer member is interposed between the electric motor and the hydraulic pump, the spacer member and the electric motor are enameled by a concave portion and a convex portion, and the spacer member and the hydraulic pump are May be fitted with a concave portion and a convex portion. In addition, the spacer member may be detachably attached to an attachment leg that is fixed to the attached member. Further, the insertion hole and the key groove into which the output shaft and the key are inserted are filled with a lubricant, and an annular seal member for sealing the lubricant is provided, and the seal member is an output shaft of the electric motor. And may be press-contacted to the shaft end of the input shaft of the hydraulic pump.

  As described in detail above, in the first aspect of the invention, the input shaft of the hydraulic pump has an insertion hole and a key groove into which the output shaft and the key are inserted at the shaft end facing the output shaft, An electric motor and a hydraulic pump were connected to rotate the input shaft by the shaft. For this reason, unlike the conventional apparatus, it is not necessary to prepare a dedicated electric motor whose output shaft is processed according to the hydraulic pump, and the hydraulic pump can be directly connected to a standard electric motor of an electric motor manufacturer. Since the motor has a frame number and the diameter and length of the output shaft corresponding to the frame number, the hydraulic pump having the insertion hole and the key groove corresponding to the output shaft of the motor and the key is the same. Regardless of the manufacturer, the frame numbered motor can be replaced according to various purposes, and it is difficult to be restricted by the replacement of the motor.

  In addition to the effect of the invention described in claim 1, the invention described in claim 2 is provided with a spacer member interposed between the electric motor and the hydraulic pump, and the spacer member and the electric motor are provided with a recess and a convex. In addition, the spacer member and the hydraulic pump are engaged with each other at the concave portion and the convex portion. For this reason, the spacer member, the motor and the hydraulic pump are fitted with a cantilever, the output shaft of the motor is inserted into the insertion hole of the input shaft of the hydraulic pump, the key of the output shaft is fitted into the key groove, and the output is Since the rotational driving force can be transmitted from the shaft to the input shaft, the electric motor and the hydraulic pump can be easily connected.

  In addition to the effect of the invention described in claim 2, the spacer member has a mounting leg that is fixed to the mounted member in a detachable manner. For this reason, since the mounting leg can be removed without removing the spacer member from the electric motor and the hydraulic pump, the fixing by the mounting leg can be easily changed.

  In addition to the effect of the invention described in claim 1, the invention described in claim 4 fills the insertion hole and key groove for inserting the output shaft and the key with a lubricant and encloses the lubricant. An annular seal member is included, and the seal member is fitted on the output shaft of the electric motor and is in pressure contact with the shaft end of the input shaft of the hydraulic pump. For this reason, the coupling portion between the output shaft and the input shaft can be satisfactorily lubricated with the lubricant over a long period of time, and the life of the apparatus can be extended.

It is the front view which showed one Embodiment of this invention and showed a part of electric motor direct connection type hydraulic pump apparatus in the cross section. It is the front view which showed a part of electric motor direct connection type hydraulic pump device which showed other embodiments in section.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes an electric motor, in which a flange member 3 is provided on one axial end side of a cylindrical electric motor casing 2 and a cover 4 is provided on the other axial end side of the electric motor casing 2. The flange member 3 has a columnar first convex portion 3A on one end side in the axial direction. Reference numeral 5 denotes an output shaft that is rotatably provided inside the motor casing 2 and has a shaft end protruding outward. Reference numeral 6 denotes a terminal box for electrically connecting a power line from an external power source (not shown) to the electric motor 1, which is fixedly attached to the outer peripheral surface of the electric motor casing 2.

  Reference numeral 7 denotes a substantially rectangular parallelepiped spacer member having a hollow shape opened in the direction perpendicular to the plane of FIG. The spacer member 7 has a first through hole 8A as a recess formed in one end surface 7A facing the electric motor 1 and a second through hole 8B as a recess formed in the other end surface 7B opposed to the hydraulic pump 9. The first through hole 8A and the second through hole 8B are located on the same axis.

  The hydraulic pump 9 projects an input shaft 10 pivotally supported therein to one end side in the axial direction of the hydraulic pump casing 11, and sucks and discharges liquid by rotational driving of the input shaft 10. Moreover, the hydraulic pump 9 forms a second convex portion 11A on one end surface of the hydraulic pump casing 11 from which the input shaft 10 protrudes. The input shaft 10 has a stepped shape including a large diameter portion 10A, a medium diameter portion 10B, and a small diameter portion 10C. The input shaft 10 is fitted with an inner ring of a bearing 12 at one end portion of the large diameter portion 10A and is recessed from the shaft end of the other end portion. An insertion hole 10D and a keyway 10E are formed. Reference numeral 13 denotes an oil seal fitted to the medium diameter portion 10B, which liquid-tightly seals the liquid in the hydraulic pump 9.

  The spacer member 7 includes a first convex portion 3A of the flange member 3 and a second convex portion 11A of the hydraulic pump casing 11 in a first through hole 8A and a second through hole 8B as concave portions formed on the same axis. In this way, the output shaft 5 of the electric motor 1 is inserted into the insertion hole 10D of the input shaft 10 of the hydraulic pump 9, and the key 5A of the output shaft 5 is fitted into the key groove 10E. 5, the rotational driving force is transmitted to the input shaft 10. 10F is a gap formed at the bottom of the insertion hole 10D into which the output shaft 5 is inserted, and is filled with a lubricant. The lubricant is also applied to the inner peripheral surface of the key 5A, the key groove 10E, the insertion hole 10D, and the outer peripheral surface of the output shaft 5. Is applied. The fitting gap between the output shaft 5 and the input shaft 10 is the fitting gap between the first convex portion 3A of the flange member 3 of the electric motor 1 and the first through hole 8A of the spacer member 7 and the second convex portion of the hydraulic pump 11. 11A and the clearance gap between the second through hole 8B of the spacer member 7 are provided larger.

  Reference numeral 15 denotes an attachment leg for fixing the electric motor direct-coupled hydraulic pump device to an attachment member (not shown), which is detachably attached by a bolt member 16 below the spacer member 7.

Next, the operation of this configuration will be described.
When the electric motor 1 is energized in the state shown in FIG. 1, the output shaft 5 rotates and rotationally drives the input shaft 10, and the hydraulic pump 9 operates to pump and discharge and discharge liquid. When the electric motor 1 is de-energized, the output shaft 5 stops rotating and the hydraulic pump 9 stops the pump operation.

  In such an operation, the input shaft 10 of the hydraulic pump 9 has an insertion hole 10D for inserting the output shaft 5 and the key 5A at the shaft end facing the output shaft 5, and a key groove 10E. The electric motor 1 and the hydraulic pump 9 were connected so as to rotationally drive the motor 10. For this reason, unlike the conventional apparatus, it is not necessary to prepare a dedicated electric motor whose output shaft is processed according to the hydraulic pump, and the hydraulic pump 9 can be directly connected to a standard electric motor of an electric motor manufacturer. The motor is defined by JIS C4210: 2010 (general-purpose low-pressure three-phase squirrel-cage induction motor) for the frame number representing the dimension from the ground to the shaft center of the output shaft and the diameter and length of the output shaft corresponding thereto. If the same frame number is used, the mounting compatibility is ensured. Therefore, the hydraulic pump 9 in which the insertion hole 10D and the key groove 10E are formed in accordance with the output shaft 5 and the key 5A of the electric motor 1 has the same frame number. Regardless of the manufacturer, the numbered motor can be replaced according to various purposes, and it is difficult to be restricted by the replacement of the motor.

  In addition, a spacer member 7 is interposed between the electric motor 1 and the hydraulic pump 9, and the first through hole 8A of the spacer member 7 and the first convex portion 3A of the flange member 3 are engaged with each other, The second through hole 8B of the spacer member 7 and the second convex portion 11A of the hydraulic pump casing 11 are engaged with each other. For this reason, the output shaft 5 of the electric motor 1 is inserted into the insertion hole 10D of the input shaft 10 of the hydraulic pump by this wax fitting, and the key 5A of the output shaft 5 is fitted into the key groove 10E. Since the rotational driving force can be transmitted to the input shaft 10 more, the electric motor 1 and the hydraulic pump 9 can be easily connected.

  In addition, the spacer member 7 is detachably mounted with mounting legs 15 that are fixed to a mounted member (not shown). For this reason, since the attachment leg 15 can be removed without removing the spacer member 7 from the electric motor 1 and the hydraulic pump 9, the fixing by the attachment leg 15 can be easily changed.

FIG. 2 shows another embodiment of the present invention, where the same parts as those of the embodiment are denoted by the same reference numerals and description thereof is omitted, and only different parts will be described.
Reference numeral 17 denotes an annular seal member formed of an elastic material such as rubber, and encloses a lubricant filled in the insertion hole 10D, the key groove 10E, and the gap 10F. The seal member 17 has its own inner diameter slightly smaller than the outer diameter of the output shaft 5 of the electric motor 1, seals the output shaft 5 inserted into the insertion hole 10 </ b> D by being externally fitted to the output shaft 5 with a margin. Further, the seal member 17 has a flexible lip portion 17A at an end portion in the axial direction, and the lip portion 17A is connected to the shaft end of the input shaft 10 of the hydraulic pump 9 on the outer diameter side from the opening portion of the key groove 10E. The shaft end of the input shaft 10 is sealed.

In operation, the electric motor 1 rotates and drives the hydraulic pump 9 to suck and discharge the liquid.
With this operation, the hydraulic pump 9 can be directly connected to a standard motor of an electric motor manufacturer, and can hardly be restricted by the replacement of the electric motor, as in the embodiment. Further, substantially like the embodiment, the first through hole 8A of the spacer member 7 and the first convex portion 3A of the flange member 3 are enameled, and the second through hole 8B of the spacer member 7 and the hydraulic pump. Since the second protrusion 11 </ b> A of the casing 11 is snugly fitted, the electric motor 1 and the hydraulic pump 9 can be easily connected. Moreover, since the attachment leg 15 can be removed without removing the spacer member 7 from the electric motor 1 and the hydraulic pump 9 in substantially the same manner as in the embodiment, the fixing by the attachment leg 15 can be easily changed.

  Furthermore, it has an annular seal member 17 that encloses the lubricant filled in the insertion hole 10D and the key groove 10E. The seal member 17 is externally fitted to the output shaft 5 of the electric motor 1 with an allowance, and the hydraulic pump 9 The input shaft 10 is in pressure contact with the shaft end. For this reason, the connecting portion between the output shaft 5 and the input shaft 10 can be satisfactorily lubricated with the lubricant for a long period of time, and the life of the apparatus can be extended.

  In each of the above-described embodiments, the spacer member 7 is interposed between the electric motor 1 and the hydraulic pump 9, but the electric motor 1 and the hydraulic pump 9 may be directly connected without using the spacer member 7. In another embodiment, the seal member 17 is externally fitted to the output shaft 5 of the electric motor 1 with a tightening margin, but the axial position of the seal member 17 may be regulated by a step formed on the snap ring or the output shaft 5. Good. Further, although the seal member 17 has the lip portion 17A, it is needless to say that the seal member may have no lip portion.

1: Electric motor 3A: First convex portion 5: Output shaft 5A: Key 7: Spacer member 8A: First through hole 8B: Second through hole 9: Hydraulic pump 10: Input shaft 10D: Insert hole 10E: Key groove 11A : 2nd convex part 15: Mounting leg

Claims (4)

  An electric motor that projects a rotatable output shaft toward one end in the axial direction, and a hydraulic pump that sucks and discharges fluid by the rotational drive of the input shaft that projects toward one end in the axial direction. The input shaft of the hydraulic pump is an output shaft Directly connected to the motor, characterized in that it has an insertion hole for inserting the output shaft and the key at the shaft end facing the key and a key groove, and the motor and the hydraulic pump are connected so as to rotationally drive the input shaft by the output shaft Shape hydraulic pump device.   A spacer member is interposed between the electric motor and the hydraulic pump, and the spacer member and the electric motor are fitted with a concave portion and a convex portion, and the spacer member and the hydraulic pump are provided with a concave portion. The electric motor direct-coupled hydraulic pump device according to claim 1, wherein the projecting portion is fitted by a convex portion.   The electric motor direct connection type hydraulic pump device according to claim 2, wherein the spacer member is detachably attached to an attachment leg fixed to the attached member.   The insertion hole for inserting the output shaft and the key and the key groove are filled with a lubricant, and an annular seal member for sealing the lubricant is provided, and the seal member is external to the output shaft of the electric motor. The electric motor direct-coupled hydraulic pump device according to claim 1, wherein the hydraulic pump device is fitted and press-contacted to an end of an input shaft of the hydraulic pump.

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