JP6887239B2 - Motor direct connection type hydraulic pump device - Google Patents

Description

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

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

Utility Model Registration No. 255922

However, in such a conventional motor direct-coupled hydraulic pump device, a dedicated insertion hole for inserting the input shaft of the hydraulic pump and a key groove for fitting the key of the input shaft are formed in the output shaft of the motor. Since a dedicated motor is required when changing the motor, there is a problem that the types of motors increase and management becomes complicated.

An object of the present invention is an electric motor capable of combining a hydraulic pump manufacturer's standard hydraulic pump with an electric motor manufacturer's standard electric motor, reducing the types of electric motors and simplifying management without preparing a dedicated motor. It provides a direct-coupled hydraulic pump device.

In order to achieve such a problem, the present invention has taken the following measures. That is,
A spacer member that connects an electric motor that projects a rotatable output shaft to one end side in the axial direction, a hydraulic pump that sucks and discharges liquid by rotationally driving an input shaft that protrudes to one end side in the axial direction, and a hydraulic pump. And a connecting member to be housed inside the spacer member, the spacer member is connected by fitting the electric motor with the concave and convex parts, and fitting the hydraulic pump with the concave and convex parts. The connecting member connects the output shaft of the electric motor fitted to the spacer member and the input shaft of the hydraulic pump, and the connecting member forms a filling chamber at the connecting portion that connects the output shaft and the input shaft. Then, the filling chamber is filled with a lubricant that lubricates the joint, and the lubricant is a hydraulic oil as a liquid to be sucked and discharged by the hydraulic pump, and this hydraulic oil is filled into the filling chamber from the inside of the hydraulic pump. A single passage is provided inside the input shaft, and the filling chamber is composed of a first filling chamber formed at the joint portion between the output shaft and the connecting member and a second filling chamber formed at the joint portion between the input shaft and the connecting member. However, it is a hydraulic pump device directly connected to an electric motor, which is characterized in that the first filling chamber and the second filling chamber are communicated with each other by a second connecting passage.

In this case, before SL output shaft has a first key in the one axial end, the coupling portion between the output shaft of the connecting member have a first key groove for fitting the first key good. Further, the input shaft may have a second key at one end in the axial direction, and the joint portion of the connecting member with the input shaft may have a second key groove for fitting the second key. Further, the input shaft is a spline shaft that forms teeth on the outer peripheral surface, and a spline hole that forms a tooth groove that meshes with the teeth of the spline shaft on the inner peripheral surface at the joint portion of the connecting member with the input shaft. May have. Further, the spacer member may have mounting legs to be fixed to the mounted member. Further, the mounting legs may be detachably attached to the spacer member.

As described in detail above, in the invention according to claim 1, the spacer member is connected by fitting the motor in the concave portion and the convex portion by inro fitting and connecting the hydraulic pump by inro fitting in the concave portion and the convex portion. The connecting member connected the output shaft of the motor fitted to the spacer member and the input shaft of the hydraulic pump. Therefore, unlike the conventional device, it is not necessary to prepare a dedicated motor whose output shaft is processed according to the hydraulic pump, and the standard hydraulic pump of the hydraulic pump manufacturer can be combined with the standard motor of the electric motor manufacturer. When changing the motor, by changing to another connecting member, the standard motor of the motor manufacturer can be used, and the types of motors can be reduced to simplify the management. It is also possible to combine the hydraulic pump with the standard motor by using a dedicated hydraulic pump whose input shaft is processed according to the standard motor, but compared to this, the hydraulic pump is also manufactured by the manufacturer. In addition to reducing the types of motors, the types of hydraulic pumps can be reduced, and management can be further simplified.

Further, the invention according to claim 1, Jun lubricant and hydraulic oil as the liquid to the hydraulic pump is suction and discharge, the interior of the input shaft communication passage for filling the working oil into the filling chamber from the inside of the hydraulic pump Provided in. Therefore, since the hydraulic oil of the hydraulic pump can be diverted as a lubricant, it is not necessary to prepare a special lubricant, and the cost can be reduced. In addition, compared to those using a lubricant such as highly viscous grease, the joints can be sufficiently soaked with hydraulic oil, so fretting caused by insufficient grease at the joints due to scattering of grease at the joints, etc. Wear can be suppressed and the life of the joint can be extended.

The invention according to claim 2, the output shaft has a first key in the one axial end, the coupling portion between the output shaft of the coupling member, the first key groove for fitting the first key Had. For this reason, since the first key is fitted into the first key groove to transmit the rotational driving force, it is sufficient to provide one key and a key groove for each of the joint portions, and the joint portion can be easily manufactured. it can.

The invention according to claim 3, the input shaft has a second key in one axial end, the coupling portion of the input shaft of the coupling member, the second key groove to fit a second key Had. For this reason, since the second key is fitted into the second key groove to transmit the rotational driving force, it is sufficient to provide one key and a key groove for each of the joint portions, and the joint portion can be easily manufactured. it can.

Further, an invention according to claim 4, the input shaft is a spline shaft to form the teeth on the outer peripheral surface, the coupling portion of the input shaft of the coupling member, the inner peripheral teeth groove teeth meshing the spline shaft It had spline holes formed on the surface. Therefore, since the rotational driving force is transmitted by the plurality of teeth and the tooth groove, the area per tooth that receives the load can be increased, and the life of the joint can be extended.

Further, an invention according to claim 5, scan pacer member has a mounting leg for fixing to the mounting member. Therefore, since the spacer member that connects the motor and the hydraulic pump has a mounting leg that is fixed to the mounted member, it can be easily fixed to the mounted member.

Further, an invention according to claim 6, taken Tsukeashi is detachably attached to the spacer member. Therefore, since the mounting legs can be removed without removing the spacer member from the motor and the hydraulic pump, the fixing by the mounting legs can be easily changed.

It is a front view which shows one Embodiment of this invention, and showed a part of the electric motor direct connection type hydraulic pump device in the cross section. It is a front view which showed the part of the electric motor direct connection type hydraulic pump device which showed the other embodiment in the cross section. It is a front view which showed the part of the electric motor direct connection type hydraulic pump device which showed still another Embodiment in the cross 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 end side of the cylindrical electric motor casing 2 in the axial direction, and a cover 4 is provided on the other end side of the electric motor casing 2 in the axial direction. The flange member 3 forms a columnar first convex portion 3A on one end side in the axial direction. Reference numeral 5 denotes an output shaft rotatably provided inside the motor casing 2, and the shaft end protrudes outward. The output shaft 5 has a first key 5A at one end in the axial direction. Reference numeral 6 denotes a terminal box for electrically connecting a power line from an external power source (not shown) to the motor 1, which is fixedly attached to the outer peripheral surface of the motor casing 2.

Reference numeral 7 denotes a hydraulic pump, which projects an input shaft 8 rotatably supported inside toward one end side in the axial direction of the hydraulic pump casing 9, and sucks and discharges the liquid by rotationally driving the input shaft 8. The hydraulic pump 7 has a second convex portion 9A formed on one end surface of the hydraulic pump casing 9 on which the input shaft 8 projects. Reference numeral 10 denotes a first communication passage formed in the axial center of the input shaft 8, which opens at one end in the axial direction and communicates with the inside of the hydraulic pump 7. The input shaft 8 has a second key 8A at one end in the axial direction. Reference numeral 11 denotes a bearing, and the inner ring is fitted to the input shaft 8. Reference numeral 12 denotes an oil seal fitted to the input shaft 8, which tightly seals the liquid in the hydraulic pump 7.

Reference numeral 13 denotes a spacer member for connecting the electric motor 1 and the hydraulic pump 7, which is a substantially rectangular parallelepiped and has a hollow shape having an opening in the vertical direction of the paper surface of FIG. The spacer member 13 has a first through hole 14A as a recess formed through the one end surface 13A facing the motor 1, and a second through hole 14B as a recess formed through the other end surface 13B facing the hydraulic pump 7. The first through hole 14A and the second through hole 14B are located on the coaxial center.

Reference numeral 15 denotes a cylindrical connecting member housed inside the spacer member 13, and a first shaft sealing member 16A for axially sealing and fitting the output shaft 5 facing the motor 1 is detachably attached to one end side in the axial direction. On the other end side in the axial direction, a second shaft sealing member 16B that is fitted by shaft-sealing the input shaft 8 facing the hydraulic pump 7 is detachably held. The connecting member 15 is formed with a first insertion hole 17A connected to the back side of the first shaft sealing member 16A in the axial direction to insert the output shaft 5, and is connected to the second shaft sealing member 16B to form an input shaft. A second insertion hole 17B into which the 8 is inserted is formed. A first key groove 18A for fitting the first key 5A on the output shaft 5 is formed in the first insertion hole 17A by recessing a part in the circumferential direction, and the first key 5A and the first key groove 18A are formed. It constitutes a joint portion between the output shaft 5 and the connecting member 15. A second key groove 18B for fitting the second key 8A on the input shaft 8 is formed in the second insertion hole 17B by recessing a part in the circumferential direction, and the second key 8A and the second key groove 18B are formed. It constitutes a joint portion between the input shaft 8 and the connecting member 15. The connecting member 15 is fixed to the output shaft 5 and the input shaft 8 with a bolt member (not shown) to regulate the movement in the axial direction.

Reference numeral 19A is a first filling chamber formed at the joint portion between the output shaft 5 and the connecting member 15, and the output shaft 5, the first key 5A, the first insertion hole 17A, and the first key groove are located on the inner side of the output shaft 5 in the axial direction. The section is formed at 18A. Reference numeral 19B is a second filling chamber formed at the joint portion between the input shaft 8 and the connecting member 15, and the input shaft 8, the second key 8A, the second insertion hole 17B, and the second key groove are located on the inner side of the input shaft 8 in the axial direction. The section is formed by 18B. Reference numeral 20 denotes a second communication passage that communicates between the first filling chamber 19A and the second filling chamber 19B. The second filling chamber 19B is filled with the hydraulic oil (drain) of the hydraulic pump 7 as a lubricant from the first continuous passage 10, and the joint portion between the input shaft 8 and the connecting member 15 is lubricated. The first filling chamber 19A is filled with the hydraulic oil (drain) of the hydraulic pump 7 filled in the second filling chamber 19B from the second passage 20, and the joint portion between the output shaft 5 and the connecting member 15 is lubricated. .. The first filling chamber 19A and the second filling chamber 19B form a filling chamber 19 formed at a joint portion that connects the output shaft 5 and the input shaft 8.

The order in which the motor 1 and the hydraulic pump 7 are connected to the spacer member 13 is as follows.
(1) The first convex portion 3A of the flange member 3 is inro-fitted into the first through hole 14A, and the motor 1 is connected to the spacer member 13 with a bolt member (not shown).
(2) The first shaft sealing member 16A is fitted to the output shaft 5, and then the first key 5A is attached.
(3) The output shaft 5 is inserted into the first insertion hole 17A, the first key 5A is fitted into the first key groove 18A, and the connecting member 15 is attached to the first shaft sealing member 16A.
(4) The second shaft sealing member 16B is fitted to the input shaft 8 of the hydraulic pump 7, and then the second key 8A is attached.
(5) The second convex portion 9A of the hydraulic pump 7 is fitted into the second through hole 14B of the spacer member 13, the input shaft 8 is inserted into the first insertion hole 17B, and the second key 8A is inserted. The second shaft sealing member 16B is attached to the connecting member 15 by fitting into the second keyway 18B.
As a result, the rotational driving force is transmitted from the output shaft 5 to the input shaft 8.
The hydraulic pump 7 may be connected to the spacer member 13 and then the motor 1 may be connected to the spacer member 13 in the reverse order of the connection.

Reference numeral 21 denotes a mounting leg for fixing the motor direct-coupled hydraulic pump device to a member to be mounted (not shown), which is detachably mounted below the spacer member 13 with a bolt member 22.

Next, the operation of such a configuration will be described.
When the electric motor 1 is energized in the state shown in FIG. 1, the output shaft 5 rotates to drive the input shaft 8 to rotate via the connecting member 15, and the hydraulic pump 7 operates the pump to suck and discharge the hydraulic oil. Then, when the motor 1 is de-energized, the rotation of the output shaft 5 is stopped, and the hydraulic pump 7 stops the pump operation.

In such an operation, the spacer member 13 connects the motor 1 to the first through hole 14A and the first convex portion 3A of the flange member 3 by fitting them together, and connects the hydraulic pump 7 to the first through hole 14B. The second convex portion 9A of the pump 7 was fitted with an inro and connected, and the connecting member 15 coupled the output shaft 5 of the motor 1 fitted with the spacer member 13 and the input shaft 8 of the hydraulic pump 7. .. Therefore, unlike the conventional device, it is not necessary to prepare a dedicated motor whose output shaft is processed according to the hydraulic pump, and the standard hydraulic pump of the hydraulic pump manufacturer can be combined with the standard motor of the electric motor manufacturer. When changing the motor, by changing to another connecting member that has a coupling part corresponding to the output shaft of the motor, the standard motor of the motor manufacturer can handle it, reducing the types of motors and simplifying management. Can be achieved. It is also possible to combine the hydraulic pump with the standard motor by using a dedicated hydraulic pump whose input shaft is processed according to the standard motor, but compared to this, the hydraulic pump is also manufactured by the manufacturer. In addition to reducing the types of motors, the types of hydraulic pumps can be reduced, and management can be further simplified.

Further, the lubricant was the hydraulic oil of the hydraulic pump 7, and the first communication passage 10 for filling the filling chamber 19 from the inside of the hydraulic pump 7 was provided at the axial center of the input shaft 8. Therefore, since the hydraulic oil of the hydraulic pump 7 can be filled in the filling chamber 19 and diverted as a lubricant, it is not necessary to prepare a special lubricant, and the cost can be reduced. Further, as compared with the case where a lubricant such as grease having high viscosity is used, the joint portion between the connecting member 15 and the output shaft 5 and the joint portion between the connecting member 15 and the input shaft 8 can be sufficiently immersed in hydraulic oil. Fretting wear caused by insufficient grease in the joint due to scattering of grease in the joint can be suppressed, and the life of the joint can be extended.

Further, the output shaft 5 has a first key 5A at one end in the axial direction, and a first key groove 18A into which the first key 5A is fitted is provided at a joint portion of the connecting member 15 with the output shaft 5. Therefore, since the first key 5A is fitted into the first key groove 18A to transmit the rotational driving force, one key and the key groove may be provided in each of the joint portions, and the joint portion can be easily manufactured. be able to.

Further, the input shaft 8 has a second key 8A at one end in the axial direction, and a second key groove 18A into which the second key 8A is fitted is provided at a joint portion of the connecting member 15 with the input shaft 8. Therefore, since the second key 8A is fitted into the second key groove 18B to transmit the rotational driving force, one key and a key groove may be provided in each of the joint portions, and the joint portion can be easily manufactured. be able to.

Further, the spacer member 13 has a mounting leg 21 that is fixed to the mounted member. Therefore, since the spacer member 13 that connects the motor 1 and the hydraulic pump 7 has the mounting legs 21 that are fixed to the mounted member, it can be easily fixed to the mounted member.

Further, the mounting legs 21 are detachably attached to the spacer member 13. Therefore, since the mounting legs 21 can be removed without removing the spacer member 13 from the motor 1 and the hydraulic pump 7, the fixing by the mounting legs 21 can be easily changed.

FIG. 2 shows another embodiment of the present invention, the same parts as those in one embodiment are designated by the same reference numerals, description thereof will be omitted, and only different parts will be described.
Reference numeral 23 denotes a filling hole communicating with the first filling chamber 19A, which opens at one end in the radial direction of the connecting member 15. Reference numeral 24 denotes a filling member for filling the filling chamber 19 with grease as a lubricant, which is screwed into the filling hole 23 and attached to the connecting member 15. The filling member 24 allows the flow of grease from the outside of the connecting member 15 to the first filling chamber 19A, and blocks the flow of grease from the first lubricating chamber 19A to the outside of the connecting member 15. The first filling chamber 19A is filled with grease from the filling member 24 to lubricate the joint portion between the output shaft 5 and the connecting member 15. The second filling chamber 19B is filled with the grease filled in the first lubricating chamber 19A from the second passage 20 to lubricate the joint portion between the input shaft 8 and the connecting member 15.

In the operation, the hydraulic pump 7 is rotationally driven by the motor 1 to suck and discharge the hydraulic oil.
By this operation, the standard hydraulic pump of the hydraulic pump manufacturer can be combined with the standard electric motor of the electric motor manufacturer, as in the case of one embodiment, and the types of electric motors can be reduced and managed without preparing a dedicated motor. It can be simplified. Further, since the hydraulic pump can be supported by the manufacturer's standard product, the types of hydraulic pumps can be reduced in addition to the reduction of the types of motors, and the management can be further simplified. Further, as in substantially the same manner as in one embodiment, since the first key 5A is fitted into the first key groove 18A to transmit the rotational driving force, one key and one key groove may be provided at each of the joints. The joint can be easily manufactured. Further, as in substantially the same manner as in one embodiment, since the second key 8A is fitted into the second key groove 18B to transmit the rotational driving force, one key and one key groove may be provided at each of the joints. The joint can be easily manufactured. Further, similarly to one embodiment, since the spacer member 13 that connects the motor 1 and the hydraulic pump 7 has the mounting legs 21 that are fixed to the mounted member, it can be easily fixed to the mounted member. Further, similarly to one embodiment, since the mounting legs 21 can be removed without removing the spacer member 13 from the motor 1 and the hydraulic pump 7, the fixing by the mounting legs 21 can be easily changed.

Furthermore, the connecting member 15 is provided with a filling member 24 for filling the filling chamber 19 with grease. Therefore, since grease can be filled from the outside of the connecting member 15 after connecting the motor 1 and the hydraulic pump 7, this is compared with the case where the filling chamber 19 is filled with grease and then the motor 1 and the hydraulic pump 7 are connected. , Easy to assemble. Further, since grease can be replenished to the filling chamber 19 as needed without disassembling, maintenance management can be facilitated.

FIG. 3 shows still another embodiment of the present invention, the same parts as those in one embodiment are designated by the same reference numerals, description thereof will be omitted, and only different parts will be described.
Instead of the input shaft 8 having the second key 8A in FIG. 1, a spline shaft 25 as an input shaft was provided. The input shaft 25 has a plurality of teeth 25A formed on the outer peripheral surface at one end in the axial direction. Further, instead of the second insertion hole 17B formed in the connecting member 15 of FIG. 1, a spline hole 26 is provided in the connecting member 15. The spline hole 26 forms a plurality of tooth grooves 26A on the inner peripheral surface that mesh with the teeth 25A of the input shaft 25. The plurality of teeth 25A and the tooth groove 26A form a joint portion between the input shaft 25 and the connecting member 15.

In the operation, the hydraulic pump 7 is rotationally driven by the motor 1 to suck and discharge the hydraulic oil.
By this operation, the standard hydraulic pump of the hydraulic pump manufacturer can be combined with the standard electric motor of the electric motor manufacturer, as in the case of one embodiment, and the types of electric motors can be reduced and managed without preparing a dedicated motor. It can be simplified. Further, since the hydraulic pump can be supported by the manufacturer's standard product, the types of hydraulic pumps can be reduced in addition to the reduction of the types of motors, and the management can be further simplified. Further, as in substantially the same manner as in one embodiment, since the first key 5A is fitted into the first key groove 18A to transmit the rotational driving force, only one key and the key groove need to be provided at each joint. , The joint can be easily manufactured. Further, similarly to one embodiment, since the spacer member 13 that connects the motor 1 and the hydraulic pump 7 has the mounting legs 21 that are fixed to the mounted member, it can be easily fixed to the mounted member. Further, similarly to one embodiment, since the mounting legs 21 can be removed without removing the spacer member 13 from the motor 1 and the hydraulic pump 7, the fixing by the mounting legs 21 can be easily changed.

Furthermore, the input shaft 25 is a spline shaft that forms a plurality of teeth 25A on the outer peripheral surface, and a plurality of tooth grooves 26A that mesh with the spline shaft are formed on the inner peripheral surface at the joint portion of the connecting member 15 with the input shaft 25. It had a spline hole 26 to form. Therefore, since the rotational driving force is transmitted by the plurality of teeth 25A and the tooth groove 26A, the area per tooth that receives the load can be increased, and the life of the joint portion can be extended.

In the embodiments described above, intake Tsukeashi 21 has been removably attached to the spacer member 13 may be integral with the spacer member 13. Further, although the connecting member 15 is fixed to the output shaft 5 and the input shaft 8 with a bolt member (not shown) to restrict the movement in the axial direction, a step portion is formed on the output shaft 5 and the input shaft 8 to form a step portion of the output shaft 5. with receiving the first shaft sealing member 16A in the stepped portion receives the second shaft sealing member 16B in the step portion of the input shaft 8, of course the us go it may also be restricted from moving in the axial direction.

1: Motor 3A: 1st convex part 5: Output shaft 5A: 1st key 7: Hydraulic pump 8: Input shaft 8A: 2nd key 9A: 2nd convex part 10: 1st continuous passage 13: Spacer member 14A: 1st through hole 14B: 2nd through hole 15: Connecting member 18A: 1st key groove 18B: 2nd key groove 19: Filling chamber 21: Mounting leg 24: Filling member 25: Input shaft 25A: Tooth 26: Spline hole 26A : Tooth groove

Claims (6)

A spacer member that connects an electric motor that projects a rotatable output shaft to one end side in the axial direction, a hydraulic pump that sucks and discharges liquid by rotationally driving an input shaft that protrudes to one end side in the axial direction, and a hydraulic pump. And a connecting member to be housed inside the spacer member, the spacer member is connected by fitting the electric motor with the concave and convex parts, and fitting the hydraulic pump with the concave and convex parts. The connecting member connects the output shaft of the electric motor fitted to the spacer member and the input shaft of the hydraulic pump, and the connecting member forms a filling chamber at the connecting portion that connects the output shaft and the input shaft. Then, the filling chamber is filled with a lubricant that lubricates the joint, and the lubricant is a hydraulic oil as a liquid to be sucked and discharged by the hydraulic pump, and this hydraulic oil is filled into the filling chamber from the inside of the hydraulic pump. A single passage is provided inside the input shaft, and the filling chamber is composed of a first filling chamber formed at the joint portion between the output shaft and the connecting member and a second filling chamber formed at the joint portion between the input shaft and the connecting member. A hydraulic pump device directly connected to an electric motor, characterized in that the first filling chamber and the second filling chamber are communicated with each other by a second connecting passage. The claim is characterized in that the output shaft has a first key at one end in the axial direction, and the joint portion of the connecting member with the output shaft has a first key groove into which the first key is fitted. Item 2. The hydraulic pressure pump device directly connected to the motor according to item 1. The claim is characterized in that the input shaft has a second key at one end in the axial direction, and the joint portion of the connecting member with the input shaft has a second key groove for fitting the second key. Item 2. The hydraulic pressure pump device directly connected to the motor according to item 1. The input shaft is a spline shaft that forms teeth on the outer peripheral surface, and the joint portion of the connecting member with the input shaft has a spline hole that forms a tooth groove that meshes with the teeth of the spline shaft on the inner peripheral surface. The hydraulic pressure pump device directly connected to an electric motor according to claim 1, wherein the hydraulic pump device is characterized by the above. The motor direct-coupled hydraulic pump device according to any one of claims 1 to 4 , wherein the spacer member has a mounting leg fixed to the mounted member. The hydraulic pump device directly connected to a motor according to claim 5 , wherein the mounting legs are detachably attached to the spacer member.

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