JP2019126185A - Method of replacing motor - Google Patents

Abstract

To provide a method of easily replacing a motor assembled in a power machine.SOLUTION: An existing stator and existing rotor attached to a power machine are removed from the power machine while being held by the motor assembly jig and maintaining the relative positional relationship between them, and at least one of the existing stator and the existing rotor is replaced with a new one while maintaining the relative positional relationship with the motor assembly jig, and the pair of replaced stator and rotor is transferred from the motor assembly jig to the power machine.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a motor replacement method for replacing a motor incorporated in a power machine.

  Conventionally, in a transmission that is a power machine of a vehicle such as a hybrid vehicle or an electric vehicle, a motor including a cylindrical stator and a rotor installed on an inner diameter side of the stator is mounted as a drive source. Such a motor is configured such that a rotational driving force is generated on the rotor by a magnetic force generated between a coil mounted on the stator core of the stator and a permanent magnet installed on the inner or outer peripheral surface of the rotor. . In a transmission provided with such a motor, when a problem such as deterioration or failure occurs in the motor due to long-term use, parts of the motor may be replaced at a local service center or dealer.

  When assembling a motor to a transmission at a service center or a dealer's repair shop, it is necessary to install the rotor on the inner diameter side of the stator against the strong magnetic force acting between the stator and the rotor. This work is against the strong magnetic force and is difficult to do manually. Therefore, the rotor is assembled on the inner diameter side of the stator using a dedicated assembling jig. Therefore, it is necessary to deploy assembly jigs at repair shops in various places. However, since the dedicated assembly jig is expensive, there is a problem that the cost is increased.

  Furthermore, it is necessary to assemble the motor to the transmission so that the axis of the rotation shaft of the transmission coincides with the axes of the rotor and the stator. Therefore, it is necessary to accurately position the stator and the rotor and assemble them into the transmission. In this work, even if a dedicated assembling jig is used, high skill is required, and it takes time and effort.

  In view of such a situation, a method has been proposed for facilitating the work of assembling the motor to the transmission. For example, in Patent Document 1, in a factory, the rotor is installed on the inner diameter side of the stator, and the buffer member is inserted into the gap between the stator and the rotor to integrate the stator and the rotor. Then, with the stator and the rotor integrated, the motor is transported to a service center or a repair shop of a dealer. In a service center or a dealer's repair shop, the transported motor is assembled to the transmission with the stator and the rotor integrated, and then the buffer member is removed to make the motor operable.

JP, 2013-27256, A

  However, according to Patent Document 1, even if the above-mentioned cushioning material is used, the assembly of the stator and the rotor still requires high skill, and it takes time and effort, and the assembly is performed in various service centers. Or it is not easy to do at the dealer's repair shop.

  The present invention has been made to solve such problems, and has an object of obtaining a motor replacement method capable of easily replacing a motor assembled to a power machine.

  A motor replacement method according to the present invention is a motor replacement method for replacing a motor incorporated in a power machine using a motor assembly jig, wherein the motor has a cylindrical mounting portion at an axial end of a rotary shaft of the power machine. The motor assembly and the rotor fixed to the rotary shaft, and the stator fixed to the housing of the power machine and having a plurality of positioning holes distributed in the circumferential direction, the motor assembly The jig comprises a rotor holding portion, a stator holding portion, and a plurality of positioning pins fitted in the respective positioning holes in the plurality of positioning holes, each of the plurality of positioning pins being used as each of the plurality of positioning holes. Attaching the rotor to the rotor holding portion; fixing the stator to the stator holding portion; Fixing the plurality of positioning pins in the state of being fitted in the positioning holes to the stator holding portion, releasing the fixation between the rotor and the rotary shaft, and fixing the stator and the housing After releasing, the step of removing the rotor and the stator in the state of being fixed to the motor assembly jig, the step of releasing the fixing between the stator and the stator holding portion, and removing the stator After fitting the plurality of positioning holes and the plurality of positioning pins, fixing the new stator to the stator holding portion, and fitting the mounting portion of the rotor and the shaft end of the rotation shaft And a step of fixing the rotor to the rotating shaft, and a step of fixing the new stator to the housing, and fixing the rotor and the rotor holding portion. And releases the fixation of the stator and the stator holder of the new, and a step of removing the motor assembly jig.

  According to the present invention, the rotor of the motor and the stator are held by the motor assembly jig while maintaining the relative positional relationship in the state of being incorporated into the power machine. Then, when at least one of the rotor and the stator held by the motor assembly jig is replaced with a new one, the replaced rotor and stator pair maintain the original relative positional relationship and are held by the motor assembly jig Be done. Thus, by transferring the rotor and stator pair held by the motor assembly jig to the power machine, the replaced rotor and stator pair is restored to the original relative positional relationship and assembled to the power machine. In this way, the motor assembled to the power machine can be easily replaced.

It is a front view which shows the motor assembly jig which concerns on Embodiment 1 of this invention. It is II-II arrow sectional drawing of FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows typically the state which attached the motor which concerns on Embodiment 1 of this invention to the transmission of a vehicle. It is a figure explaining the process of cancel | releasing fixation with the transmission of the motor in the motor replacement | exchange method which concerns on Embodiment 1 of this invention partially. It is a figure explaining the process of mounting a motor assembly jig in the motor in the motor exchange method concerning Embodiment 1 of this invention. It is a figure explaining the state which attached the motor assembly jig to the motor in the motor exchange method concerning Embodiment 1 of this invention. It is principal part sectional drawing which shows the state which fixed the positioning pin in the motor replacement | exchange method which concerns on Embodiment 1 of this invention to a motor assembly jig. It is a figure explaining the process of removing the motor hold | maintained at the motor assembly jig in the motor replacement | exchange method which concerns on Embodiment 1 of this invention from a transmission. It is sectional drawing which shows the state from which the motor hold | maintained at the motor assembly jig in the motor replacement | exchange method which concerns on Embodiment 1 of this invention was removed from the transmission. It is a figure explaining the process of removing a stator from the motor assembly jig in the motor replacement | exchange method which concerns on Embodiment 1 of this invention. It is a figure explaining the process of removing a rotor from the motor assembly jig in the motor replacement | exchange method which concerns on Embodiment 1 of this invention.

Embodiment 1
1 is a front view showing a motor assembly jig according to Embodiment 1 of the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is related to Embodiment 1 of the present invention. It is a sectional view showing typically the state where the motor was attached to the transmission of vehicles.

  1 and 2, the motor assembly jig 10 includes a base 11 of a ring-shaped flat plate as a stator holding portion, a cylindrical cylindrical portion 12 projecting from an inner diameter end of the base 11 to one surface of the base 11, and a cylinder A bottom portion 13 of a ring-shaped flat plate as a rotor holding portion, a cylindrical fitting portion 14 protruding from an inner diameter end of the bottom portion 13 to one surface side of the bottom portion 13 and a positioning pin 40 And (not shown). In the motor assembly jig 10, for example, a molded body of a metal material such as aluminum is cut to improve dimensional accuracy.

  The base 11 penetrates the base 11 in the thickness direction, respectively, and penetrates the base 11 in the thickness direction along the three first through holes 15a arranged at equal angular pitches on the same circumference. Three second through holes 15b arranged equiangularly on the circumference, and three screw holes 15c penetrating the base 11 in the thickness direction and arranged equiangularly on the same circumference. It is formed. The hole diameter increases in the order of the screw hole 15c, the second through hole 15b, and the first through hole 15a. The first through holes 15a, the second through holes 15b, and the screw holes 15c are distributed and arranged on the same circumference. The support 16 is formed to project from one surface of the base 11 coaxially with each screw hole 15 c. A screw hole 15 c is formed at the axial center position of the support 16. The projecting height of the support 16 is X.

  The bottom 13 penetrates the bottom 13 in the thickness direction, and the three through holes 17a arranged at equal angular pitches on the same circumference and the bottom 13 respectively penetrate the thickness 13 on the same circumference. And three screw holes 17b arranged at equal angular pitches. The diameter of the through hole 17a is larger than the diameter of the screw hole 17b. The through holes 17 a and the screw holes 17 b are distributed in the circumferential direction on the same circumference.

  Here, the state in which the motor 1 is attached to the transmission will be described with reference to FIG.

  The motor 1 includes a stator 2 and a rotor 5. The stator 2 includes a stator core 3 and a stator coil (not shown) attached to the stator core 3. The stator core 3 is formed in an annular shape, for example, by integrally laminating core pieces punched out of a magnetic steel sheet. The flange 4 is manufactured as a ring-shaped flat plate having a diameter larger than that of the stator core 3, coaxially disposed at one axial end of the stator core 3, and fixed to the stator core 3 by welding or the like. Six screw holes 18 a and three through holes 18 b as positioning holes are formed in the flange 4 so as to penetrate the flange 4 in the plate thickness direction. The six screw holes 18a are circumferentially arranged on the same circumference so as to be coaxial with the first through holes 15a and the screw holes 15c when the stator core 3 is arranged coaxially with the motor assembly jig 10. Distributed and arranged. The three through holes 18 b are distributed in the circumferential direction on the same circumference so as to be coaxial with each of the second through holes 15 b when the stator core 3 is arranged coaxially with the motor assembly jig 10. It is done. The diameter of the through hole 18 b is larger than the diameter of the screw hole 18 a.

  The rotor 5 includes a cylindrical core portion 6, an annular mounting portion 7, and a connecting portion 8 for connecting the other axial end of the core portion 6 and the mounting portion 7. Although not shown, permanent magnets constituting a magnetic pole are disposed on the inner or outer peripheral surface of the core portion 6. Six screw holes 19 are formed in the mounting portion 7 so as to penetrate the mounting portion 7 in the axial direction. The six screw holes 19 are circumferentially distributed on the same circumference so as to be coaxial with each of the through hole 17a and the screw hole 17b when the rotor 5 is arranged coaxially with the motor assembly jig 10. Are arranged.

  A flange 21 is formed on the shaft end side of a rotary shaft 20 of a transmission as a power machine, which is a component of a vehicle, over the entire circumference with a certain axial thickness and a certain radial height. A cylindrical fitting protrusion 22 is coaxially formed at the axial end of the rotation shaft 20. The fitting portion between the fitting convex portion 22 and the mounting portion 7 has a so-called inlay structure. That is, when the mounting portion 7 is fitted into the fitting convex portion 22, the outer peripheral surface of the fitting convex portion 22 and the inner peripheral surface of the mounting portion 7 are in contact, and the axial center of the mounting portion 7 is the fitting convex portion 22, It corresponds to the axial center of the rotating shaft 20. Six screw holes 23 are formed in the flange 21 so as to penetrate the flange 21 in the axial direction. The six screw holes 23 are circumferentially distributed on the same circumference so as to be coaxial with the screw holes 19 when the mounting portion 7 is fitted into the fitting convex portion 22. There is.

  The transmission housing 25 has a flat mounting surface 26 orthogonal to the axis of the rotary shaft 20. Nine screw holes 27 are formed in the housing 25 such that the direction of the holes is parallel to the axial center of the rotating shaft 20 and opens in the mounting surface 26. The nine screw holes 27 circumferentially have the same circumference so as to be coaxial with the six screw holes 18 a and the three through holes 18 b when the stator 2 is arranged coaxially with the rotation shaft 20. It is arranged dispersed in the direction.

  The rotor 5 has the mounting portion 7 fitted in the fitting convex portion 22, and the rotor mounting bolt 30 is screwed into the screw holes 19 and 23 so as to be fastened and fixed to the rotating shaft 20. The stator 2 presses the flange 4 against the mounting surface 26 of the housing 25 and screws the stator mounting bolt 31 into the screw holes 18a and 27 and screws the stator mounting bolt 31 from the through hole 18b into the screw hole 27 and clamps the housing 25. It is fixed. Here, the axial centers of the stator 2 and the rotor 5 coincide with the axial center of the rotating shaft 20. Thus, the motor 1 is attached to the transmission coaxially with the rotating shaft 20.

  Next, replacement work of the motor 1 attached to the transmission will be described. FIG. 4 is a diagram for explaining a process of partially releasing the fixing of the motor with the transmission in the motor replacement method according to the first embodiment of the present invention. FIG. 5 is a view for explaining a process of mounting a motor assembly jig on a motor in the motor replacement method according to Embodiment 1 of the present invention, and FIG. 5 (a) is a view showing main parts. (B) of FIG. 5 is a view showing the periphery of the support column. FIG. 6 is a view for explaining a state in which a motor assembly jig is attached to the motor in the motor replacing method according to Embodiment 1 of the present invention, and FIG. (B) of FIG. 6 is a view showing the periphery of the support column. FIG. 7 is a cross-sectional view of an essential part showing a state in which the positioning pin is fixed to the motor assembly jig in the motor replacing method according to Embodiment 1 of the present invention. FIG. 8 is a view for explaining the step of removing the motor held by the motor assembly jig in the motor replacement method according to Embodiment 1 of the present invention from the transmission, and FIG. 8 (a) shows the main part It is a figure and (b) of Drawing 8 is a figure showing the circumference of a pillar part. FIG. 9 is a cross-sectional view showing a state in which the motor held by the motor assembly jig in the motor replacement method according to Embodiment 1 of the present invention is removed from the transmission, and FIG. 10 is a diagram showing Embodiment 1 of the present invention. FIG. 11 is a view for explaining the step of removing the stator from the motor assembly jig in the motor replacement method, and FIG. 11 is a view for explaining the step of removing the rotor from the motor assembly jig in the motor replacement method according to the first embodiment of the present invention is there. For convenience of explanation, the motor 1, the stator 2 and the rotor 5 before replacement are referred to as the existing motor 1, the existing stator 2 and the existing rotor 5, respectively. Further, the motor 1 after replacement, the stator 2 and the rotor 5 will be referred to as a new motor 1, a new stator 2 and a new rotor 5.

First, as shown in FIG. 4, the three rotor mounting bolts 30 are removed. The three rotor mounting bolts 30 to be removed are the rotor mounting bolts 30 fastened to the screw holes 19 and 23 at positions corresponding to the screw holes 17 b formed in the bottom 13 of the motor assembly jig 10. Thus, the existing rotor 5 is fixed to the rotating shaft 20 by the remaining three rotor mounting bolts 30.
Furthermore, the six stator mounting bolts 31 are removed. The six stator mounting bolts 31 to be removed are fastened to the through holes 18b and the screw holes 18a at positions corresponding to the second through holes 15b and the screw holes 15c formed in the base 11 of the motor assembly jig 10. It is a stator mounting bolt 31. Thus, the existing stator 2 is fixed to the housing 25 by the remaining three stator mounting bolts 31.

  Next, as shown in FIG. 5A, the fitting pin portion 40b of the positioning pin 40 is attached to each of the three through holes 18b. Then, the fitting portion 14 of the motor assembly jig 10 is fitted into the mounting portion 7 of the existing rotor 5. Thereby, the axial centers of the existing motor 1, the motor assembly jig 10, and the rotating shaft 20 coincide with each other. Next, the motor assembly jig 10 is rotated about its axis, and as shown in FIGS. 5 (a) and 5 (b), the screw holes 18a and 19 of the existing motor 1 and the motor assembly jig 10 are obtained. The positions of the motor assembly jig 10 are adjusted in the circumferential direction such that the first through holes 15a and the screw holes 15c, 17a, 17b face each other.

  Next, as shown in FIG. 6B, the fitting portion 14 of the motor assembly jig 10 is pushed into the mounting portion 7 of the existing rotor 5 to press the support portion 16 against the flange 4. Next, the mounting bolt 32 is screwed into the screw holes 15c and 18a to fasten and fix the base 11 and the flange 4. Next, as shown in FIG. 6A, the mounting bolt 33 is screwed into the screw holes 17b and 19 so that the bottom portion 13 and the mounting portion 7 are fastened and fixed. Further, the pin mounting bolt 34 is screwed into the second through hole 15 b and screwed into the screw hole 40 c to fasten and fix the base 11 and the positioning pin 40. As a result, the existing motor 1 and the motor assembly jig 10 are integrated.

  Here, the fixing structure of the base 11 and the positioning pin 40 will be described with reference to FIG.

  The positioning pin 40 is configured by coaxially connecting a large diameter base portion 40a and a small diameter fitting pin portion 40b. Furthermore, a screw hole 40c is formed at the axial center position of the base 40a from the opposite side to the fitting pin portion 40b. The positioning pin 40 is attached to the flange 4 with the fitting pin portion 40 b fitted in the through hole 18 b. At this time, the fitting portion between the fitting pin portion 40b and the through hole 18b has an inlay structure, and the outer peripheral surface of the fitting pin portion 40b is in contact with the inner peripheral surface of the through hole 18b, and the fitting pin portion The axis of 40b coincides with the axis of the through hole 18b. In a state where the fitting portion 14 of the motor assembly jig 10 is pushed into the mounting portion 7 of the rotor 5 and the support portion 16 is pressed against the flange 4, a gap d1 is formed between the positioning pin 40 and the base 11 ing. When the positioning pin 40 is fastened and fixed to the base 11 by the pin mounting bolt 34, the base 40a is in surface contact with the base 11. Further, a gap d1 is formed between the base 40a and the flange 4. The fitting pin portion 40b is located in the through hole 18b by a distance d2. A gap d3 is formed between the shaft portion of the pin mounting bolt 34 and the inner wall surface of the second through hole 15b.

  As described above, in the structure in which the existing motor 1 and the motor assembly jig 10 are integrated, the relative positional relationship is maintained while the existing stator 2 and the existing rotor 5 are attached to the transmission. It is held by the assembly jig 10. Since the fitting portion 14 and the mounting portion 7 are fitted in the inlay state, the axial centers of the existing rotor 5 and the motor assembly jig 10 coincide with each other. That is, the fitting portion 14 serves as a reference member for determining the relative position between the existing rotor 5 and the motor assembly jig 10. Further, the fitting pin portion 40b of the positioning pin 40 and each of the three through holes 18b dispersed in the circumferential direction are fitted in the inlay state. Thus, the three positioning pins 40 serve as reference members for determining the relative positions of the existing stator 2 and the motor assembly jig 10. Furthermore, the base 11 and the flange 4 are fastened and fixed by the mounting bolt 32 at three locations dispersed in the circumferential direction. As a result, the motor assembly jig 10 and the existing stator 2 are integrated with their axes aligned. Further, the positioning pin 40 is fastened and fixed to the base 11 by the pin mounting bolt 34. As a result, the reference member for determining the relative position between the existing stator 2 and the motor assembly jig 10 is transferred to the motor assembly jig 10.

  Next, as shown in FIG. 6A, the stator mounting bolt 31 is loosened and removed from the first through hole 15a, and the fixing of the existing stator 2 and the housing 25 is released. Further, as shown in FIG. 8A, the rotor mounting bolt 30 is loosened and removed from the through hole 17a, and the fixing of the existing rotor 5 and the rotating shaft 20 is released. Next, the motor assembly jig 10 is moved to the right in FIG. 8 (a). As a result, as shown in FIG. 8A, the mounting portion 7 of the existing rotor 5 is separated from the fitting convex portion 22 of the rotation shaft 20. Further, as shown in FIG. 8 (b), the flange 4 of the existing stator 2 is separated from the mounting surface 26 of the housing 25. Thus, as shown in FIG. 9, the motor assembly jig 10 is maintained while maintaining the relative positional relationship between the existing stator 2 and the existing rotor 5 attached to the housing 25 and the rotary shaft 20. Will be held by

  Next, as shown in FIG. 10, the mounting bolt 32 is removed, and the existing stator 2 is removed from the motor assembly jig 10. Further, as shown in FIG. 11, the mounting bolt 33 is removed, and the existing rotor 5 is removed from the motor assembly jig 10. The motor assembly jig 10 is a reference member for determining the relative position between the stator 2 and the motor assembly jig 10, which is a reference member for determining the relative position between the rotor 5 and the motor assembly jig 10 And a positioning pin 40.

  Then, in order to attach the motor 1 newly installed, an operation reverse to the above-described removal operation is performed. First, the mounting portion 7 of the new rotor 5 is fitted into the fitting portion 14 of the motor assembly jig 10. As a result, the axes of the new rotor 5 and the motor assembly jig 10 coincide with each other. Next, the rotor 5 newly formed is rotated about the axis to align the screw holes 17b and 19 with each other. Next, as shown in FIG. 10, the mounting bolt 33 is screwed into the screw holes 17b and 19 from the side opposite to the new rotor 5 of the motor assembly jig 10 to fix the new rotor 5 to the motor assembly jig 10. . Next, the newly installed stator 2 is brought close to the motor assembly jig 10 through the outer peripheral side of the newly installed rotor 5. Then, the mounting bolt 32 is screwed into the screw holes 15 c and 18 a from the side opposite to the newly installed stator 2 of the motor assembly jig 10 to fix the newly installed stator 2 to the motor assembly jig 10. As a result, as shown in FIG. 9, the newly installed stator 2 and the newly installed rotor 5 are restored to the relative positional relationship between the existing stator 2 attached to the housing 25 and the rotating shaft 20 and the existing rotor 5. And held by the motor assembly jig 10.

  Then, the mounting portion 7 of the newly-formed rotor 5 is fitted into the fitting convex portion 22 of the rotating shaft 20. As a result, the axial centers of the new rotor 5 and the rotating shaft 20 coincide with each other. Next, the rotor mounting bolt 30 is screwed into the screw holes 19 and 21 to fasten and fix the new rotor 5 and the rotating shaft 20. Next, the stator mounting bolt 31 is screwed into the screw holes 18a and 27 from the first through hole 15a to clamp and fix the new stator 2 and the housing 25. Thereby, the fitting pin portion 40b of the positioning pin 40 is inserted into the through hole 18b.

  Then, the mounting bolt 33 is removed, and the fixation between the newly-formed rotor 5 and the motor assembly jig 10 is released. Further, the mounting bolt 32 is removed, and the fixation between the newly installed stator 2 and the motor assembly jig 10 is released. Then, the motor assembly jig 10 is removed. Thus, the new rotor 5 is attached to the rotating shaft 20 coaxially with the rotating shaft 20 by the three rotor mounting bolts 30. Further, the newly installed stator 2 is attached to the housing 25 by three stator attachment bolts 31. Thus, the newly installed stator 2 and the newly installed rotor 5 are restored to the relative positional relationship between the existing stator 2 and the existing rotor 5, and are held by the rotating shaft 20 and the housing 25.

  Then, the rotor mounting bolt 30 is screwed into the screw hole 19 from which the mounting bolt 33 has been removed and the screw hole 23 of the flange 21. As a result, the new rotor 5 is firmly attached to the rotating shaft 20 by the six rotor attachment bolts 30. Then, the stator mounting bolt 31 is screwed into the screw hole 18 a from which the mounting bolt 32 has been removed and the screw hole 27 of the housing 25. Furthermore, the stator mounting bolt 31 is screwed into the screw hole 27 of the housing 25 from the through hole 18 b. As a result, the newly installed stator 2 is firmly attached to the housing 25 by nine stator attachment bolts 31, and the replacement work of the motor 1 is completed.

  In the first embodiment, the existing rotor 5 is attached to the rotary shaft 20 by fitting the attaching portion 7 to the fitting convex portion 22 in an inserting state. The existing stator 2 has the flange 4 fixed to the housing 25. Therefore, after the positioning pin 40 is mounted in the through hole 18 b of the flange 4, the fitting portion 14 is fitted in the mounting portion 7 in a flush state, and the motor assembly jig 10 is mounted on the existing rotor 5. Next, the existing rotor 5 is fixed to the bottom 13 of the motor assembly jig 10, and the positioning pin 40 is fixed to the base 11, and then the existing stator 2 is fixed to the base 11. As a result, the existing stator 2 and the existing rotor 5 are held by the motor assembly jig 10 while maintaining the relative positional relationship between the stator 2 and the existing rotor 5 attached to the transmission.

  Then, when the existing rotor 5 is replaced with the new rotor 5, the relative positional relationship between the existing stator 2 and the new rotor 5 is determined by the insertion of the mounting portion 7 of the new rotor 5 and the fitting portion 14. By fitting the state, the original relative positional relationship is reproduced. Furthermore, when the existing stator 2 is replaced with the new stator 2, the relative positional relationship between the new rotor 5 and the new stator 2 is reproduced to the original relative positional relationship by the positioning pin 40.

  Therefore, the mounting portion 7 of the new rotor 5 held by the motor assembly jig 10 is fitted in the fitting convex portion 22 of the rotation shaft 20 in an inlay state, and the new rotor 5 is fixed to the flange 21 of the rotation shaft 20 By fixing the newly installed stator 2 to the housing 25, the existing motor 1 can be replaced with the newly installed motor 1. Thus, the new motor 1 is restored to its original relative positional relationship and attached to the transmission. Then, the axes of the new rotor 5 and the rotating shaft 20 coincide with each other, and the axes of the new stator 2 and the newly formed rotor 5 coincide with each other.

  As described above, it is not necessary to adjust the axial center position of the motor 1 and the rotary shaft 20 newly provided. Therefore, even in a service center or a dealer's repair shop, the existing motor 1 can be easily replaced with the new motor 1 without using a large-scale dedicated assembly jig.

  The through hole 18b into which the stator mounting bolt 31 for fixing the stator 2 to the housing 25 is inserted also serves as a positioning hole into which the fitting pin portion 40b of the positioning pin 40 is inserted. Therefore, the number of through holes 18 b formed in the flange 4 of the stator 2 can be reduced, and the hole processing of the flange 4 of the stator 2 becomes easy.

  Further, a screw hole 18 a to which the stator mounting bolt 31 for fixing the stator 2 to the housing 25 is fastened is also used as a screw hole for fixing the stator 2 to the base 11 of the motor assembly jig 10. Therefore, the number of screws 18 a formed on the flange 4 of the stator 2 can be reduced, and the hole processing of the flange 4 of the stator 2 becomes easy.

  Further, a screw hole 19 in which a stator mounting bolt 31 for fixing the rotor 5 to the flange 21 of the rotating shaft 20 is tightened is also used as a screw hole for fixing the rotor 5 to the bottom 13 of the motor assembly jig 10. Therefore, the number of screw holes 18 a formed in the mounting portion 7 of the rotor 5 can be reduced, and hole processing of the mounting portion 7 of the rotor 5 becomes easy.

  Further, the second through hole 15 b is formed larger in diameter than the shaft portion of the pin mounting bolt 34. Therefore, dimensional errors in manufacturing the stator 2 and the rotor 5 are absorbed by the fastening portion between the positioning pin 40 and the base 11 by the pin mounting bolt 34 passed through the second through hole 15 b.

  Further, the base 40 a of the positioning pin 40 and the base 11 of the motor assembly jig 10 are fixed in surface contact. Therefore, the positioning pin 40 can be fixed to the base 11 in a stable state, and the relative positional relationship between the stator 2 and the motor assembly jig 10 can be maintained with high accuracy.

  In the first embodiment, both the stator 2 and the rotor 5 are replaced, but when only the stator 2 is deteriorated or failed, only the stator 2 may be replaced, and only the rotor 5 is deteriorated. Or, in case of failure, only the rotor 5 may be replaced. When only the stator 2 is to be replaced, the rotor 5 is held by the motor assembly jig 10, so the fitting portion 14 which is a reference member for determining the relative position between the rotor 5 and the motor assembly jig 10 is It becomes unnecessary. Further, when only the rotor 5 is replaced, the stator 2 is held by the motor assembly jig 10, so the positioning pin 40 which is a reference member for determining the relative position between the stator 2 and the motor assembly jig 10 is unnecessary. It becomes.

  In the first embodiment, the through hole 18b into which the stator mounting bolt 31 for fixing the stator 2 to the housing 25 is inserted is also used as the positioning hole into which the fitting pin portion 40b of the positioning pin 40 is inserted. However, a dedicated positioning hole into which the fitting pin portion 40 b is inserted may be formed in the flange 4 of the stator 2.

  Further, in the first embodiment, the screw hole 18a to which the stator mounting bolt 31 for fixing the stator 2 to the housing 25 is tightened is also used as the screw hole for fixing the stator 2 to the base 11 of the motor assembly jig 10. However, a dedicated screw hole for fixing the stator 2 to the base 11 of the motor assembly jig 10 may be provided on the flange 4 of the stator 2.

  Further, in the first embodiment, the screw hole 19 in which the stator mounting bolt 31 for fixing the rotor 5 to the flange 21 of the rotating shaft 20 is tightened is a screw for fixing the rotor 5 to the bottom 13 of the motor assembly jig 10. Although a hole is also used, a dedicated screw hole for fixing the rotor 5 to the bottom 13 of the motor assembly jig 10 may be provided in the mounting portion 7 of the rotor 5.

  In the first embodiment, three through holes 18b into which the positioning pins 40 are inserted are provided, but if the through holes 18b are distributed in the circumferential direction, they may be two or more. Just do it. There are three fixed positions of the stator 2 and the base 11 of the motor assembly jig 10, but the fixed positions of the stator 2 and the base 11 may be two or more if they are distributed in the circumferential direction. Just do it. Although there are three fixed positions of the rotor 5 and the bottom 13 of the motor assembly jig 10, the fixed positions of the rotor 5 and the bottom 13 may be two or more if they are distributed in the circumferential direction. Just do it.

  Reference Signs List 1 motor, 2 stator, 5 rotor, 7 mounting portion, 10 motor assembly jig, 11 base (stator holding portion), 13 bottom portion (rotor holding portion), 14 fitting portion, 15 second through hole, 18b through hole ( Positioning hole), 20 rotation shaft, 25 housing, 30 rotor mounting bolt, 31 stator mounting bolt, 34 pin mounting bolt, 40 positioning pin.

Claims (9)

A motor replacement method for replacing a motor incorporated in a power machine using a motor assembly jig, comprising:
The motor is fixed to the rotor fixed to the rotary shaft and the housing of the power machine by circumferentially fitting a cylindrical mounting portion in an inserted state at the shaft end of the rotary shaft of the power machine. A stator having a plurality of distributed positioning holes,
The motor assembly jig includes a rotor holding portion, a stator holding portion, and a plurality of positioning pins fitted in the inlay state to the plurality of positioning holes, respectively.
Fitting the plurality of positioning pins into each of the plurality of positioning holes;
Securing the rotor to the rotor holding portion;
Securing the stator to the stator holding portion;
Securing the plurality of positioning pins fitted to the plurality of positioning holes to the stator holding portion;
Releasing the fixed state between the rotor and the rotary shaft and releasing the fixed state between the stator and the housing, and then removing the rotor and the stator in a state fixed to the motor assembly jig;
Releasing the fixation between the stator and the stator holding portion, and removing the stator;
Fixing the new stator to the stator holding portion after the plurality of positioning holes of the new stator and the plurality of positioning pins are fitted;
Fitting the mounting portion of the rotor and the shaft end of the rotating shaft;
Fixing the rotor to the rotating shaft and fixing the new stator to the housing;
Releasing the fixing between the rotor and the rotor holding portion, releasing the fixing between the newly installed stator and the stator holding portion, and removing the motor assembly jig;
Motor replacement method comprising: The stator is fixed to the housing by stator mounting bolts at each of a plurality of circumferentially distributed fixed positions.
Prior to the step of fitting the plurality of positioning pins into each of the plurality of positioning holes, the stator mounting bolt is removed at a fixing position of a part of the plurality of fixing positions,
In the step of fixing the stator to the stator holding portion, the stator is fixed to the stator holding portion at the partial fixing position;
The motor replacement method according to claim 1, wherein, in the step of fixing the new stator to the stator holding portion, the new stator is fixed to the stator holding portion at the partial fixing position. The stator is fixed to the housing by stator mounting bolts at each of a plurality of circumferentially distributed fixed positions.
The plurality of positioning holes are located at a part of fixed positions among the plurality of fixed positions,
The motor replacement method according to claim 1, wherein the stator mounting bolt at the fixed position is removed prior to the step of fitting the plurality of positioning pins into each of the plurality of positioning holes.   In the step of fixing the plurality of positioning pins to the stator holding portion, the motor assembly jig is disposed in a state in which the stator holding portion is separated from the plurality of positioning pins fitted in each of the plurality of positioning holes. The motor replacement method according to any one of claims 1 to 3, wherein each of the positioning pins is fastened and fixed to the stator holding portion by a pin mounting bolt.   5. The motor replacement method according to claim 4, wherein a through hole having a diameter larger than that of the shaft portion through which the shaft portion of the pin mounting bolt passes is formed in the stator holding portion.   The motor replacement method according to claim 4 or 5, wherein a plurality of support columns which are in contact with the stator and position the stator holding portion so as to be separated from the plurality of positioning pins are erected on the stator holding portion. .   The step of fixing the plurality of positioning pins to the stator holding portion, the plurality of positioning pins are fixed to the stator holding portion in a surface contact state. Motor replacement method. A motor replacement method for replacing a motor incorporated in a power machine using a motor assembly jig, comprising:
The motor has a cylindrical mounting portion fitted in the axial end of the rotary shaft of the power machine in an inlay state, and a rotor fixed to the rotary shaft; a stator fixed to the housing of the power machine; Equipped with
The motor assembly jig includes a fitting portion fitted to the mounting portion in an inlay state, a rotor holding portion, and a stator holding portion.
Fitting the motor assembly jig to the motor by fitting the fitting portion to the mounting portion;
Securing the rotor to the rotor holding portion;
Securing the stator to the stator holding portion;
Releasing the fixed state between the rotor and the rotary shaft and releasing the fixed state between the stator and the housing, and then removing the rotor and the stator in a state fixed to the motor assembly jig;
Releasing the fixation between the rotor and the rotor holding portion and removing the rotor;
Fixing the new rotor to the rotor holding portion after the new rotor mounting portion and the fitting portion are fitted together;
Fitting the mounting portion of the new rotor and the shaft end of the rotating shaft;
Fixing the new rotor to the rotary shaft and fixing the stator to the housing;
Releasing the fixation between the new rotor and the rotor holding portion, releasing the fixation between the stator and the stator holding portion, and removing the motor assembly jig.
Motor replacement method comprising: The rotor is fixed to the rotating shaft by rotor mounting bolts at each of a plurality of fixed positions distributed in the circumferential direction.
The rotor mounting bolt is removed at one of a plurality of fixing positions prior to the step of fitting the fitting portion and the mounting portion and fitting the motor assembly jig to the motor.
In the step of fixing the rotor to the rotor holding portion, the rotor is fixed to the rotor holding portion at the partial fixing position;
9. The motor replacement method according to claim 8, wherein in the step of fixing the new rotor to the rotor holding portion, the new rotor is fixed to the rotor holding portion at the partial fixing position.

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