JP6489154B2 - Direct connection type motor pump - Google Patents

Description

  The present invention relates to a direct connection type motor pump in which, for example, an output shaft of a motor and a drive shaft of a pump are connected.

  Some motor pumps have a motor output shaft and a pump drive shaft connected by spline coupling. Conventionally, as a countermeasure against spline wear of a motor pump, there is a technique of oil lubrication by supplying pump hydraulic oil to a spline part.

Utility Model No. 3206239

  In this technology, since hydraulic oil is used for oil lubrication of the spline part, spline wear powder is mixed into the pump, or contamination in the pump oil path is mixed into the spline part. There is a problem that induces spline wear. In this technique, the output shaft of the motor is connected in a state of being inserted into the engagement hole formed in the drive shaft of the pump, and the hydraulic oil from the pump side is supplied from the end of the spline portion. There is a problem that the operating oil in the spline is not replaced with new operating oil in a timely manner, and spline wear cannot be completely suppressed. Note that the same problem may occur even with other coupling methods such as key fastening, not limited to splines.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a direct-coupled motor pump that can suppress wear of a connecting portion between a motor output shaft and a pump drive shaft without deterioration of the pump.

In the direct-coupled motor pump according to the first aspect of the present invention, an engagement hole is formed in one shaft end surface of the output shaft of the motor and the drive shaft of the pump, and the other shaft is inserted into the engagement hole. In the coupled direct-coupled motor pump, the motor or pump on the side of the motor and the pump in which the engagement hole is formed is connected to a coupling portion between the output shaft and the drive shaft, and an outer periphery of the motor or pump. A passage communicating with the surface is formed, and the lubricant can be supplied to the connecting portion through the passage, and the connecting portion and the outer peripheral surface of the motor or pump are in communication with the motor or pump. A groove portion to be formed is formed, and the lubricant can be discharged from the connection portion to the outside through the groove portion .

  In this direct-coupled motor pump, the motor or pump is formed with a passage that connects the connecting portion between the output shaft and the drive shaft and the outer peripheral surface of the motor or pump, and the lubricant is connected through the passage. Because it is configured so that hydraulic oil can be supplied to the connecting part, wear powder in the connecting part enters the pump, and contamination in the oil path of the pump enters the connecting part. By doing so, it is possible to prevent the pump from being deteriorated and the wear of the connecting portion being induced.

  The direct connection type motor pump according to a second aspect of the present invention is the direct connection type motor pump according to the first aspect, wherein the passage includes a body passage formed in a body portion of the shaft-side motor or pump in which the engagement hole is formed, and the engagement. And a shaft passage formed in the shaft in which the hole is formed.

  In this direct-coupled motor pump, the passage that connects the connecting portion between the output shaft and the drive shaft and the outer peripheral surface of the motor or pump has a main body passage and an axial passage, and the outer peripheral surface of the main body portion has a periphery of the connecting portion. In addition, a lubricant supply port can be formed. Therefore, since the length of the passage is short, the lubricant can be efficiently supplied to the connecting portion.

  A direct-coupled motor pump according to a third aspect of the present invention is the first or second aspect, wherein the passage includes a space between a bottom portion of the engagement hole and a tip portion of the other shaft, and the motor or the pump. It is characterized by communicating with the outer peripheral surface.

  In this direct connection type motor pump, the lubricant flows from the tip of the other shaft toward the connecting portion inside the engagement hole, so that the lubricant in the connecting portion can be completely replaced with a new lubricant.

  A direct-coupled motor pump according to a fourth aspect of the present invention is the motor according to any one of the first to third aspects, wherein an engagement hole is formed in the shaft end surface of the output shaft of the motor, and the drive shaft of the pump It is connected in the state inserted in the joint hole.

  In this direct-coupled motor pump, since the inertia force of the coupling can be eliminated with respect to the coupling fastening structure, which is a general fastening method of the pump and motor other than the direct-coupled type, the response of the pump rotation is increased. be able to. Further, the cost can be reduced by eliminating the coupling.

  As described above, according to the present invention, the following effects can be obtained.

  In the first invention, the motor or the pump is formed with a passage that connects the connecting portion between the output shaft and the drive shaft and the outer peripheral surface of the motor or the pump, and the lubricant is connected to the connecting portion through the passage. Since it is configured to be able to supply, wear powder in the connecting part mixes in the pump, as in the case of supplying hydraulic oil to the connecting part, and contamination in the oil path of the pump enters the connecting part. This can prevent the pump from being deteriorated and the wear of the connecting portion from being induced.

  In the second invention, the passage that connects the connecting portion between the output shaft and the drive shaft and the outer peripheral surface of the motor or the pump has a main body passage and an axial passage, and is provided around the connecting portion on the outer peripheral surface of the main body. Lubricant supply ports can be formed. Therefore, since the length of the passage is short, the lubricant can be efficiently supplied to the connecting portion.

  In the third aspect of the invention, the lubricant flows from the tip of the other shaft toward the connecting portion inside the engagement hole, so that the lubricant in the connecting portion can be completely replaced with a new lubricant.

  In the fourth invention, since the inertia force of the coupling can be eliminated with respect to the coupling fastening structure which is a general fastening method of the pump and the motor other than the direct coupling type, the response of the pump rotation is increased. Can do. Further, the cost can be reduced by eliminating the coupling.

It is sectional drawing which shows the direct connection type motor pump which concerns on embodiment of this invention. FIG. 2 is an enlarged view of a periphery of a connecting portion between an output shaft of a motor and a drive shaft of a pump shown in FIG. 1.

  Hereinafter, embodiments of a direct-coupled motor pump according to the present invention will be described with reference to the drawings.

[Overall configuration of direct-coupled motor pump]
The direct connection type motor pump 1 according to the present embodiment includes a motor 2 and a pump 3 as shown in FIG. The motor 2 has a cylindrical housing 10, and both ends of the housing 10 are closed by two covers 11 and 12. The housing 10 and the two covers 11 and 12 constitute a main body 2 a of the motor 2. Inside the housing 10, a stator 13 and a rotor 14 disposed inside the stator 13 are accommodated. The stator 13 has a coil 15. An output shaft 16 of the motor 2 is attached to the rotor 14, and the output shaft 16 is pivotally supported by bearings 11 a and 12 a disposed on the two covers 11 and 12. The output shaft 16 of the motor 2 is connected to a drive shaft 17 disposed so as to protrude from the outer peripheral surface of the main body 3 a of the pump 3. The right end portion of the main body 3 a of the pump 3 is in contact with the left end portion of the cover 11 of the motor 2. The drive shaft 17 is pivotally supported by a bearing 17 a in the main body 3 a of the pump 3.

  A configuration around the connecting portion of the output shaft 16 of the motor 2 and the drive shaft 17 of the pump 3 will be described with reference to FIG.

  An engagement hole 16b is formed in the shaft end surface 16a of the output shaft 16 of the motor 2, and the drive shaft 17 of the pump 3 is connected by the spline portion 20 while being inserted into the engagement hole 16b. Therefore, a motor side spline portion 20 a is formed on the inner peripheral surface of the engagement hole 16 b of the output shaft 16, and a pump side spline portion 20 b is formed on the outer peripheral surface of the drive shaft 17 of the pump 3. Therefore, the connection part of the motor side spline part 20a and the pump side spline part 20b constitutes the spline part 20.

  As described above, the end portion of the output shaft 16 of the motor 2 on the pump 3 side is pivotally supported by the bearing 11a disposed on the cover 11, and the bearing 11a is configured by a bearing with a seal. The seal member 11 a prevents the lubricant from leaking from the pump 3 side toward the motor 2 side between the inner peripheral surface of the cover 11 and the outer peripheral surface of the output shaft 16. A recess 20 is formed on the end surface of the cover 11 on the pump 3 side, and a seal member 21 is disposed between the inner peripheral surface of the recess 20 and the outer peripheral surface of the output shaft 16. The seal member 21 is disposed away from the bearing 11a toward the pump 3 side. The seal member 21 prevents the lubricant from leaking from the motor 2 side toward the pump 3 side between the inner peripheral surface of the recess 20 of the cover 11 and the outer peripheral surface of the output shaft 16. In the main body 3a of the pump 3, a seal member 17b is disposed closer to the motor 2 than the bearing 17a.

  A lubricant supply port 30 is formed on the outer peripheral surface of the cover 11 constituting a part of the main body 2 a of the motor 2, and the output shaft 16 of the motor 2 and the drive shaft 17 of the pump 3 are formed inside the cover 11. A passage 31 is formed to connect the spline portion 20, which is a connecting portion of the motor 2, and the lubricant supply port 30 formed on the outer peripheral surface of the motor 2. The passage 31 has a main body passage 31 a formed in the cover 11 of the motor 2 and a shaft passage 31 b formed in the output shaft 16 of the motor 2. In the present invention, as the lubricant supplied from the lubricant supply port 30, for example, grease or the like is used.

  The body passage 31a is a hole extending from the lubricant supply port 30 toward the spline portion 20 inside the cover 11, and the shaft passage 31b extends from the outer peripheral surface of the output shaft 16 to the inner peripheral surface of the engagement hole 16b. It is a hole that extends toward you. The shaft passage 31b opens from the spline portion 20 to the bottom side of the engagement hole 16b on the inner peripheral surface of the engagement hole 16b. Therefore, the passage 31 allows the space between the bottom of the engagement hole 16 b and the tip of the drive shaft 17 of the pump 3 to communicate with the lubricant supply port 30 formed on the outer peripheral surface of the motor 2.

  A groove 32 communicating with the lower end of the recess 20 is formed on the outer peripheral surface of the cover 11. The groove 32 discharges hydraulic oil leaking from the pump 3. In the direct connection type motor pump 1 of the present invention, when the lubricant is supplied from the lubricant supply port 30 formed on the outer peripheral surface of the motor 2, the lubricant that has passed through the spline portion 20 toward the pump 3 side is: It is discharged to the outside through the groove 32. Therefore, the lubricant that has passed through the spline part 20 can be prevented from entering the pump 3.

  Therefore, in the direct-coupled motor pump 1 of the present invention, the lubricant supplied from the lubricant supply port 30 formed on the outer peripheral surface of the motor 2 passes through the main body passage 31a and then passes through the shaft passage 31b, The spline portion 20 inside the joint hole 16b is supplied to the bottom side of the engagement hole 16b. Thereafter, the lubricant in the engagement hole 16 b passes through the spline part 20 toward the pump 3 side and is discharged to the outside through the groove part 32.

<Characteristics of direct-coupled motor pump of this embodiment>
The direct connection type motor pump 1 of the present embodiment has the following characteristics.

  In the direct connection type motor pump 1 of the present embodiment, the motor 2 is connected to the spline portion 20, which is a connecting portion between the output shaft 16 of the motor 2 and the drive shaft 17 of the pump 3, and the outer peripheral surface of the motor 2. 31 is formed, and the lubricant can be supplied to the spline part 20 through the passage 31, so that the spline wear powder is mixed into the pump as in the case of supplying hydraulic oil to the spline part 20. It is possible to prevent pump deterioration and spline wear induction due to contamination and contamination in the oil path of the pump mixed into the spline part.

  In the direct connection type motor pump 1 of the present embodiment, the passage 31 that connects the spline portion 20 that is a connecting portion between the output shaft 16 of the motor 2 and the drive shaft 17 of the pump 3 and the outer peripheral surface of the motor 2 is a main body passage. The lubricant supply port 30 can be formed around the spline portion 20 on the outer peripheral surface of the main body portion 2 a of the motor 2. Therefore, since the length of the passage 31 is short, the lubricant can be efficiently supplied to the spline portion 20.

  In the direct-coupled motor pump 1 of the present embodiment, the passage 31 has a space between the bottom of the engagement hole 16 b of the output shaft 16 of the motor 2 and the tip of the drive shaft 17 of the pump 3, and the main body of the motor 2. Since the lubricant flows from the tip end of the drive shaft 17 of the pump 3 toward the pump 3 side inside the engagement hole 16b, the spline portion is configured to communicate with the outer peripheral surface of the pump 2a. 20 lubricants can be completely replaced with new lubricants.

  In the direct connection type motor pump 1 of the present embodiment, an engagement hole 16b is formed in the output shaft 16 of the motor 2, and the drive shaft 17 of the pump 3 is connected in a state of being inserted into the engagement hole 16b. Since the inertia force of the coupling can be eliminated with respect to the coupling fastening structure which is a general fastening method of the pump and the motor other than the mold, the response of the pump rotation can be improved. Further, the cost can be reduced by eliminating the coupling.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

  In the above embodiment, the case where grease or the like is used as the lubricant supplied from the lubricant supply port 30 has been described. However, other lubricants may be supplied from the lubricant supply port 30.

  In the above embodiment, the passage 31 has a space between the bottom of the engagement hole 16 b of the output shaft 16 of the motor 2 and the tip of the drive shaft 17 of the pump 3 and the outer peripheral surface of the main body 2 a of the motor 2. Although the case where it comprised so that it communicates was demonstrated, the channel | path 31 may be comprised so that the spline part 20 and the outer peripheral surface of the main-body part 2a of the motor 2 may be connected.

  In the above embodiment, the case where the passage 31 that connects the spline portion 20 and the outer peripheral surface of the motor 2 has the main body passage 31a and the shaft passage 31b has been described, but the spline portion 20 and the outer peripheral surface of the motor 2 are connected. The passage 31 to be made up may be constituted only by a main body passage formed in the main body portion 2 a of the motor 2.

  In the above embodiment, the engagement hole 16 b is formed in the output shaft 16 of the motor 2, the drive shaft 17 of the pump 3 is connected in a state of being inserted into the engagement hole 16 b, and the spline portion 20 and the motor 2 are connected to the motor 2. In the above description, the passage 31 that communicates with the outer peripheral surface of the pump 3 is formed. However, the engagement hole is formed in the drive shaft 17 of the pump 3 and the output shaft 16 of the motor 2 is inserted into the engagement hole. A passage that connects the spline portion 20 and the outer peripheral surface of the pump 3 to the pump 3 may be formed.

  In the above-described embodiment, spline fastening between the output shaft 16 of the motor 2 and the drive shaft 17 of the pump 3 has been described. However, the spline is not limited to spline, and other coupling methods such as key fastening may be used. In the above embodiment, the seal member 21 is used to prevent the lubricant from leaking from the motor 2 side toward the pump 3 side. However, not only the seal member but also other structures that can be sealed such as a bearing with a seal. It may be composed of materials.

  By utilizing the present invention, spline wear can be suppressed without deterioration of the pump.

DESCRIPTION OF SYMBOLS 1 Direct connection type motor pump 2 Motor 2a Main body part 3 Pump 16 Output shaft 16b Engagement hole 17 Drive shaft 20 Spline part 31 Passage 31a Main body passage 31b Shaft passage

Claims (4)

In the direct connection type motor pump in which an engagement hole is formed in one shaft end surface of the output shaft of the motor and the drive shaft of the pump, and the other shaft is connected in a state of being inserted into the engagement hole.
A passage is formed in the motor or pump on the side of the motor and the pump where the engagement hole is formed to connect the connecting portion between the output shaft and the drive shaft and the outer peripheral surface of the motor or pump. The lubricant can be supplied to the connecting portion via the passage, and the motor or the pump is formed with a groove that communicates the connecting portion with the outer peripheral surface of the motor or the pump. A direct-coupled motor pump characterized in that the lubricant can be discharged from the connecting portion to the outside . The passage is
A body passage formed in the body portion of the shaft-side motor or pump in which the engagement hole is formed;
The direct connection type motor pump according to claim 1, further comprising a shaft passage formed in the shaft in which the engagement hole is formed.   3. The direct connection type according to claim 1, wherein the passage communicates a space between a bottom portion of the engagement hole and a tip portion of the other shaft and an outer peripheral surface of the motor or the pump. Motor pump. An engagement hole is formed in the shaft end surface of the output shaft of the motor,
4. The direct connection type motor pump according to claim 1, wherein the drive shaft of the pump is connected in a state of being inserted into the engagement hole.

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