Oil application device

Abstract

To propose a technology that enables appropriate application of a lubricant and suitable recovery of the lubricant.SOLUTION: An oil application device has an upper jig that can be inserted into the central hole of a rotor core and is provided with a lubricant discharge outlet, and a lower jig that is provided with a lubricant recovery passage for recovering the lubricant discharged from the lubricant discharge outlet. When a shaft is pressed into the rotor core from above, the upper jig is pushed by the shaft and moves downward within the central hole. When the oil application device is in use, the upper jig discharges a lubricant from the lubricant discharge port. Furthermore, the upper jig is pushed by the shaft and moves downward within the center hole. This allows the lubricant to be applied over a wide area of the central hole of the rotor core, allowing the shaft to be smoothly press-fitted into the central hole. As the lubricant flows from the upper jig to the lower jig, the lubricant is collected by the lubricant collection passage provided in the lower jig. Therefore, the lubricant can be applied appropriately and the lubricant can be suitably recovered.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to an oil application device. [Background technology]

[0002] Patent Document 1 discloses a technique for applying a lubricant to a press-fit member in a press-fitting step of press-fitting a press-fit member into a press-fitted member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 4-134715 Summary of the Invention [Problem to be solved by the invention]

[0004] Applying a lubricant appropriately to the surface where the press-fit member contacts the pressed-fit member makes the press-fit smooth. On the other hand, if too much lubricant is applied, the excess lubricant will adhere to the equipment, making it difficult to manage. This specification proposes a technology that allows for the appropriate application of lubricant and the efficient recovery of the lubricant.

[0005] (Aspect 1) The oil application device of embodiment 1 disclosed in this specification has an upper jig that can be inserted into the central hole of the rotor core and is provided with a lubricant discharge port, and a lower jig that is provided with a lubricant recovery path that recovers the lubricant discharged from the lubricant discharge port, and is configured so that when a shaft is pressed into the rotor core from above, the upper jig is pushed by the shaft and moves downward within the central hole.

[0006] When using the oil application device, the upper jig is inserted into the central hole of the rotor core, and the lower jig is positioned below the upper jig. The upper jig applies lubricant to the central hole of the rotor core by discharging lubricant from the lubricant discharge port. When a shaft is press-fitted into the rotor core from above, the upper jig is pushed by the shaft and moves downward within the central hole. This allows lubricant to be applied over a wide area of ​​the central hole of the rotor core, allowing the shaft to be smoothly press-fitted into the central hole. The lubricant flows from the upper jig to the lower jig, where it is collected by a lubricant recovery passage provided in the lower jig. In this way, this oil application device allows for appropriate application of lubricant and favorable collection of the lubricant. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG.

[0008] 1 and 2 includes an upper jig 10 and a lower jig 20. The upper jig 10 and the lower jig 20 each have a cylindrical shape. As shown in FIG. 2, the upper jig 10 is disposed above the lower jig 20.

[0009] A lubricant flow path is provided inside the upper jig 10. The downstream end of the lubricant flow path extends along the radial direction of the upper jig 10 and is connected to a lubricant discharge port 12 provided on the outer circumferential surface of the upper jig 10. The lubricant discharge port 12 discharges a lubricant (e.g., oil) from inside the upper jig 10 to the outside.

[0010] A groove 14 is provided on the outer peripheral surface of the upper jig 10. The groove 14 extends downward from the lubricant discharge port 12. The lubricant dripping from the lubricant discharge port 12 flows downward along the groove 14.

[0011] The entire outer circumferential surface of the lower side of the upper jig 10 has a chamfered portion 16. The lubricant flowing along the outer circumferential surface of the upper jig 10 and along the groove 14 flows along the chamfered portion 16 toward the radially inward side of the upper jig 10.

[0012] The lower jig 20 is disposed below the upper jig 10. The lower jig 20 is connected to the lower end of the upper jig 10 in a coaxial state with the upper jig 10. The lower jig 20 has a lubricant inlet 22, a lubricant recovery path 24, and a lubricant outlet 26. The lubricant inlet 22 is provided on the outer peripheral surface of the lower jig 20. A pipe (not shown) is connected to the lubricant inlet 22, and lubricant is supplied from the outside. A lubricant flow path is also provided inside the lower jig 20. The lubricant that flows into the lower jig 20 from the lubricant inlet 22 passes through the lubricant flow path of the lower jig 20 and the lubricant flow path of the upper jig 10, and is discharged from the lubricant discharge port 12.

[0013] The lubricant recovery path 24 has a lubricant recovery groove 28 and a lubricant recovery hole 30. The lubricant recovery groove 28 is arranged on the outer periphery of the upper surface of the lower jig 20. The lubricant recovery groove 28 is also arranged directly below the chamfered portion 16. The lubricant recovery hole 30 is provided within the lubricant recovery groove 28. The lubricant recovery hole 30 is connected to the lubricant discharge port 26 via a lubricant recovery flow path (not shown) provided in the lower jig 20. The lubricant discharge port 26 is provided on the outer periphery of the lower jig 20. The lubricant discharged from the lubricant discharge port 12 flows into the lubricant recovery groove 28 via the chamfered portion 16. The lubricant flowing through the lubricant recovery groove 28 flows to the lubricant discharge port 26 via the lubricant recovery hole 30. The lubricant is discharged to the outside from the lubricant discharge port 26.

[0014] Next, the press-fitting process will be described. In the press-fitting process, the shaft 40, rotor core 42, and oil application device 100 shown in Fig. 3 are used. In addition, the oil application device 100 is used in a state where the lower side of the upper jig 10 and the upper side of the lower jig 20 are connected, as shown in Fig. 2.

[0015] In the press-fitting process, first, as shown in FIG. 3 , the upper jig 10 is inserted into the center hole 44 so that the top surface of the upper jig 10 is positioned above the rotor core 42. At this time, a gap is provided between the center hole 44 and the outer peripheral surface of the upper jig 10. The center hole 44 has a size that allows the shaft 40 to be press-fitted. Next, the shaft 40 is placed above the upper jig 10.

[0016] Next, the shaft 40 is press-fitted from above the rotor core 42. At this time, the upper jig 10 is pushed by the shaft 40 and moves downward within the center hole 44. Also, the lower jig 20 is pushed by the upper jig 10 and moves downward.

[0017] During the press-fitting process, lubricant is supplied to the lower jig 20 through the lubricant inlet 22. The lubricant supplied to the lower jig 20 flows through the lower jig 20 and the upper jig 10 to the lubricant outlet 12. The lubricant is discharged from the lubricant outlet 12 toward the center hole 44. As a result, the lubricant is applied to the surface of the center hole 44. Furthermore, the gap between the center hole 44 and the outer peripheral surface of the upper jig 10 allows the lubricant to be applied to the entire circumferential direction of the center hole 44. As the upper jig 10 moves downward due to being pressed by the shaft 40, the lubricant outlet 12 applies the lubricant to the center hole 44 while moving downward. Therefore, the lubricant is applied to the entire circumferential direction of the center hole 44. Therefore, the shaft 40 is press-fitted into the center hole 44 to which the lubricant has been applied. As a result, galling can be prevented during the press-fitting process.

[0018] Furthermore, during the press-fitting process, excess lubricant discharged from the lubricant discharge port 12 (e.g., lubricant that bounces off the surface of the center hole 44) flows along the outer peripheral surface of the upper jig 10 and the groove 14 toward the chamfered portion 16. The excess lubricant flows through the chamfered portion 16 into the lubricant recovery groove 28. The lubricant that has flowed into the lubricant recovery groove 28 is then discharged to the outside from the lubricant discharge port 26 via the lubricant recovery hole 30. This allows the excess lubricant to be suitably recovered within the oil application device 100 by the lubricant recovery path 24. This prevents the lubricant from adhering to unintended parts of the press-fitting equipment. This eliminates the need for a process for wiping the lubricant off the surface of the press-fitting equipment.

[0019] In the above-described embodiment, the lubricant can be applied to the rotor core 42 during the press-fitting process. Therefore, the press-fitting process can be carried out efficiently.

[0020] The groove 14 of the above-described embodiment can move the lubricant dripping from the lubricant discharge port 12 to the chamfered portion 16. Therefore, the lubricant dripping from the lubricant discharge port 12 can be efficiently collected in the lubricant recovery path 24.

[0021] Although the embodiments have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and variations of the specific examples exemplified above. The technical elements described in this specification or drawings exhibit technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Furthermore, the technology exemplified in this specification or drawings simultaneously achieves multiple objectives, and achieving one of these objectives itself has technical utility. [Explanation of symbols]

[0022] 10: Upper jig 12: Lubricant outlet 20: Lower jig 24: Lubricant recovery path 28: Lubricant recovery groove 30: Lubricant recovery hole 40: Shaft 42: Rotor core 44: Center hole 100: Oil application device

Claims

[Claim 1] An oil application device, an upper jig that can be inserted into the central hole of the rotor core and that has a lubricant discharge port; a lower jig provided with a lubricant recovery path for recovering the lubricant discharged from the lubricant discharge port; and the upper jig is configured to be pushed by the shaft and move downward within the central hole when the shaft is press-fitted into the rotor core from above. Oil application device.

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