JP4372453B2 - Method for assembling motor rotor assembly - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
It relates the set elevation process of the present invention is the motor rotor, and more particularly, to a method of assembling the assembly of motor rotor assembly and secured by press-fitting or caulking rotor shaft to the rotor.
[0002]
[Prior art]
FIG. 5 is an explanatory view showing a conventional method of assembling a motor rotor assembly. The rotor assembly of the motor is provided so that the rotor shaft is connected to the rotation center of the rotor by press-fitting or caulking so that the rotor and the rotor shaft rotate integrally. FIG. 5 shows a method of assembling the rotor that press-fits and fixes the press-fitting portion 12a formed at the tip of the rotor shaft 12 into the connecting hole 10a provided in the rotor 10 using a support jig. ing. Reference numeral 20 denotes a base plate, and reference numeral 22 denotes a support jig that is fixed upright on the base plate 20. The support jig 22 is provided with an insertion hole 23 into which the rotor shaft 12 is inserted.
[0003]
This support jig is set by inserting the rotor shaft 12 into the insertion hole 23 of the support jig 22 and aligning the press-fit portion 12a of the rotor shaft 12 with the connection hole 10a of the rotor 10. The press 24 is pushed down from above the child 10, and the press-fitting portion 12 a of the rotor shaft 12 is press-fitted into the connection hole 10 a of the rotor 10. A knurl is provided on the outer peripheral surface of the press-fitting portion 12a of the rotor shaft 12, and when the press-fitting portion 12a is press-fitted into the connecting hole 10a of the rotor 10, the outer peripheral surface of the press-fitting portion 12a is inserted into the inner peripheral surface of the connecting hole 10a. It is fixed immediately. A central portion of the rotor 10 into which the rotor shaft 12 is press-fitted is provided in a cylindrical portion where the connection hole 10a is opened, and the press-fit portion 12a and the rotor 10 are securely connected.
[0004]
[Problems to be solved by the invention]
In the method of assembling the rotor assembly shown in FIG. 5, the rotor shaft 12 is set by simply inserting the rotor shaft 12 into the insertion hole 23 of the support jig 22. Is in a state of abutting against the upper surface of the base plate 20. Therefore, when the press 24 is pushed down from above the rotor 10, the load at that time acts directly on the lower end portion of the rotor shaft 12, and the rotor shaft 12 is supported by the support jig 22. However, there was a problem that the load during assembly acts to bend the rotor shaft 12.
[0005]
The bending of the rotor shaft appears as a rotational fluctuation when the driving force is transmitted by the rotor shaft, and when used in a part requiring high accuracy such as a driving system of a copying machine, image unevenness occurs. It happens. Also, when used in a drive system where belt tension is applied, such as a timing pulley, the radial load on the rotor shaft increases due to repeated stress, which may cause a risk of breakage. There is.
FIG. 5 shows a method of assembling the assembly of the rotor 10 and the rotor shaft 12 by a press-fitting method. The rotor shaft and the rotor shaft are assembled by caulking the rotor shaft into a connecting hole provided in the rotor. The same problem occurs when assembling a solid.
[0006]
Therefore, the present invention has been made to solve these problems, and the object of the present invention is to directly connect the rotor shaft to the rotor shaft during assembly when assembling the rotor and rotor shaft assembly. Motor assembly that can be obtained as a high-quality rotor assembly without causing the load to act and without causing deformation of the rotor shaft to be bent, and a high-quality assembly. To provide an assembly method.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises the following arrangement.
That is, a rotor of a motor in which a connecting portion provided at the tip of a rotor shaft is press-fitted or fixed by caulking into a connecting hole provided at the rotation center of the rotor so that the rotor and the rotor shaft can be integrally rotated. in the assembly method of the assembly, as the rotor shaft, in a position adjacent to the front Symbol connecting portion, using a rotor shaft locking groove is kicked setting, as a support jig for supporting the rotor shaft A locking support portion provided at a thickness and depth that slides inside the locking groove, from a position where the locking groove of the rotor shaft is formed to a lower end surface of the rotor shaft Use a support jig in which the length dimension from the position where the locking support portion is formed to the lower end surface is set longer than the length dimension of the locking support , and the locking support of the support jig in the locking groove part engage, support the rotor shaft standing is allowed to Ritsu lifting by the supporting jig It is aligned with the connecting portion of the connecting hole and the rotor shaft of the rotor, while supporting the rotor shaft by the support jig, and the rotor shaft and the rotor by press-fitting or caulking operation It is characterized by fixing.
The locking groove provided on the outer peripheral surface of the rotor shaft may be provided so as to make one round in the circumferential direction of the rotor shaft, or the rotor shaft has a shape that can be engaged with the locking support portion of the support jig. It may be partially provided in the direction. The connecting portion refers to a press-fitting portion or a caulking portion provided on the rotor shaft in order to connect and fix the rotor shaft and the rotor by press-fitting or caulking.
[0008]
Further, a rotor shaft provided with a locking groove that goes around the outer peripheral surface of the rotor shaft is used as the rotor shaft, and a pair of support jigs formed in a semi-cylindrical shape is used as the support jig. When using and supporting the rotor shaft upright so as to be suspended by the support jig, the support jig is disposed so as to sandwich the rotor shaft from both sides, and the support jig Both the locking support portions are engaged over the entire circumference of the locking groove to support the rotor shaft.
The method of assembling the rotor assembly of the motor according to claim 1 .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an explanatory view showing a configuration of an embodiment for assembling a motor rotor assembly. In the motor rotor assembly method of the present embodiment, the press-fitting portion 12a of the rotor shaft 12 is press-fitted into the connection hole 10a provided at the rotation center of the rotor 10 in the same manner as the assembly method shown in FIG. Thus, the assembly of the rotor of the motor is formed. When the press-fitting portion 12 a is press-fitted into the connecting hole 10 a of the rotor 10, the rotor shaft 12 is supported upright by the support jig 30, and provided at the tip of the rotor shaft 12 protruding from the support jig 30. With the press-fit portion 12a and the connecting hole 10a of the rotor 10 aligned, the press 24 is pushed down from above the rotor 10 to press-fit the press-fit portion 12a into the connecting hole 10a of the rotor 10 and the rotor shaft 12 The basic method of fixing the rotor and the rotor 10 together is the same as the method shown in FIG.
[0010]
In the assembling method of the present embodiment, a characteristic configuration different from the conventional method is that a locking groove 12b is provided on the outer peripheral surface of the rotor shaft 12 adjacent to the press-fit portion 12a provided at the tip of the rotor shaft 12, and is supported. A locking support portion 30a that engages with the locking groove 12b is provided at the top of the jig 30, and the rotor shaft 12 is supported by the support jig 30 so as to perform the press-fitting operation. It is in.
FIG. 2 shows an enlarged configuration of a support portion that supports the rotor shaft 12 by the support jig 30. As shown in the figure, the outer peripheral surface of the press-fitting portion 12a provided at the tip of the rotor shaft 12 is in contact with the inner peripheral surface of the cylindrical portion 10b provided in the central portion of the rotor 10 by a press-fitting operation. Knurls are provided to improve the sticking. The locking groove 12b is provided around the outer peripheral surface of the rotor shaft 12 in the vicinity of the base portion of the press-fit portion 12a.
[0011]
On the other hand, the locking support portion 30a provided on the top of the support jig 30 is engaged with the locking groove 12b to suspend the rotor shaft 12 by the support jig 30, as shown in FIG. It is provided so that it can be supported. In order to allow the locking support portion 30a to engage with the locking groove 12b, the locking support portion 30a is disposed so as to surround the rotor shaft 12, and has a thickness and depth that can be slid into the locking groove 12b. Is provided.
[0012]
As shown in FIG. 1, the support jig 30 used in the assembling method of the present embodiment has a length dimension from the position where the locking groove 12 b of the rotor shaft 12 is formed to the lower end surface of the rotor shaft 12. Also, the length dimension from the position where the locking support portion 30a of the support jig 30 is formed to the lower end surface of the support jig 30 is provided to be long. In other words, the lower end of the rotor shaft 12 in a state where the support member 30 supporting the rotating rotor shaft 12 is spaced from the lower end surface of the support member 30 (upper surface of the base plate 20), the rotor shaft 12 supporting jig It is suspended and supported by 30 latching support portions 30a.
In the present embodiment, since the rotor shaft 12 is supported by being suspended by the locking support portion 30a of the support jig 30, the load acting on the rotor shaft 12 when the press 24 is pushed down is rotated. It is received by the locking groove 12b of the child shaft 12.
[0013]
FIG. 3 is a plan view showing a state in which the rotor shaft 12 is supported by the support jig 30. The state where the locking support portion 30a of the support jig 30 enters the locking groove 12b provided on the outer peripheral surface of the rotor shaft 12 is shown. In the present embodiment, a pair of support jigs 30, 30 formed in a semi-cylindrical shape so as to surround the outer peripheral surface of the rotor shaft 12 are arranged to face each other, and the rotor shaft 12 is disposed on both sides by the support jigs 30, 30. As a result, the locking support portion 30 is engaged with the entire periphery of the locking groove 12b provided around the outer peripheral surface of the rotor shaft 12.
In order to support the rotor shaft 12 so as to be sandwiched between the support jigs 30 and 30 from both sides, the support jigs 30 and 30 are provided on the base plate 20 so as to be movable toward and away from each other, and the locking support portions 30a and 30a are provided. May be set so that the rotor shaft 12 is sandwiched between the support jigs 30 and 30 so as to be engaged with the locking grooves 12 b of the rotor shaft 12.
[0014]
Of course, the method of supporting the rotor shaft 12 by the support jig 30 is not limited to the above-described method. For example, a support jig provided with a set hole having a U shape in a planar shape is used to support the rotor shaft 12. The rotor shaft 12 is set so as to be inserted into the set hole from the side of the opening side of the tool, and the locking groove 12b is engaged with the locking support portion formed on the inner peripheral side surface of the setting hole to thereby rotate the rotor. A method of supporting the shaft 12 by suspending it, and a support jig 30 formed in a flat plate shape parallel to the base plate 20 with an interval at which the rotor shaft 12 can be inserted from the open side. Rotating from the side of the support jig 30 by placing it upright, providing a locking support portion 30a on the upper inner surface of the support jig 30, and engaging the locking groove 12b with the locking support portion 30a By inserting and setting the slave shaft 12, the support jig 30 How such like for supporting the rotor shaft 12 so that suspended are possible.
[0015]
FIG. 1 shows a state in which the rotor shaft 12 is suspended and supported by a support jig 30, the press-fitting portion 12 a of the rotor shaft 12 and the connection hole 10 a of the rotor 10 are aligned, and the press 24 is A state in which the press-fitting portion 12a is press-fitted from the upper side of the rotor 10 is shown.
Since the rotor shaft 12 is supported so as to be suspended on the upper side thereof by a locking support portion 30a provided on the support jig 30, the load during press-fitting is a locking groove of the rotor shaft 12. It only acts on the part where 12b is formed, and the external force which bends the rotor shaft 12 with respect to the whole rotor shaft 12 is not added. As a result, it is possible to press-fit and fix the rotor shaft 12 to the rotor 10 while suppressing deformation such as bending of the rotor shaft 12.
[0016]
Since the load when pushing down the press 24 acts in the vicinity of the locking groove 12b, the locking groove 12b is located as close as possible to the tip side of the rotor shaft 12, that is, the press-fit portion 12a to which the rotor 10 is connected. It is good to provide in. This is because the load acting on the rotor shaft 12 is prevented from acting so as to bend the rotor shaft 12 as the distance between the press-fit portion 12a and the locking groove 12b is sufficiently narrowed.
The locking groove 12b is used as a portion where the locking support portion 30a of the support jig 30 engages when the rotor shaft 12 is press-fitted and fixed to the rotor 10, but the rotor shaft 12 is used as the rotor 10. After being press-fitted and fixed to the rotor, it can be used as an engagement groove for locking the E-ring for stable support of the rotor 10.
[0017]
The above embodiment shows a method of assembling the rotor assembly by press-fitting the rotor shaft 12 into the connecting hole 10a of the rotor 10, but the rotor shaft 12 is fixed to the rotor 10 by caulking and the motor is fixed. The assembly of the rotor can be performed in exactly the same manner.
FIG. 4 is an explanatory diagram showing a configuration in the case of assembling a motor rotor assembly by caulking. A caulking operation is performed with the rotor shaft 12 supported by the support jig 30 so as to be suspended. A caulking portion 12c and an enlarged diameter portion 12d are provided on the distal end side of the rotor shaft 12, and a locking groove 12b is provided on the outer peripheral surface of the rotor shaft 12 adjacent to the enlarged diameter portion 12d. The locking support portion 30a provided on the inner peripheral surface of the top of the support jig 30 is engaged with the locking groove 12b, and the caulking portion 12c is rotated by supporting the rotor shaft 12 so as to be suspended by the support jig 30. The child 10 is fixed by caulking.
[0018]
Also in this case, the caulking operation is performed by supporting the upper side of the rotor shaft 12 so as to be suspended by the support jig 30 so that the load during caulking works to bend the rotor shaft 12. The rotor shaft 12 can be caulked and fixed to the rotor 10 without causing deformation of the rotor shaft 12.
Thus, by preventing the rotor shaft 12 from being deformed when the rotor shaft 12 and the rotor 10 are connected and fixed together, high-quality rotation without the rotor shaft 12 being shaken. It becomes possible to assemble the child assembly. This makes it possible to provide an assembly that can be suitably used for a drive system or the like that requires high accuracy such as a copying machine.
In addition, the assembly method itself is not significantly different from the conventional assembly method, the workability is not particularly impaired, and the structure of the support jig is simple, so that there is no problem that the production cost of the jig is high. There are advantages.
[0019]
【The invention's effect】
According to the method of assembling the rotor assembly of the motor according to the present invention, it is possible to easily assemble the rotor assembly of the motor and to assemble the rotor assembly without deforming the rotor shaft. It is possible to provide an assembly of a rotor of a motor suitably used for a drive system of an apparatus that requires high accuracy.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a method of assembling a rotor assembly of a motor according to the present invention.
FIG. 2 is an explanatory view showing, in an enlarged manner, a state in which a rotor shaft is supported by a support jig.
FIG. 3 is a plan view of a state where a rotor shaft is supported by a support jig.
FIG. 4 is an explanatory view showing another assembling method of the rotor assembly of the motor.
FIG. 5 is an explanatory view showing a conventional assembly method of a motor rotor assembly;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Rotor 10a Connection hole 12 Rotor shaft 12a Press-fit part 12b Locking groove 12c Caulking part 12d Expanded diameter part 20 Base plate 22 Support jig 23 Insertion hole 24 Press 30 Support jig 30a Locking support part

Claims (2)

A motor rotor set in which a connecting portion provided at the tip of the rotor shaft is press-fitted or fixed by caulking into a connecting hole provided at the rotation center of the rotor so that the rotor and the rotor shaft are integrally rotatable. In the three-dimensional assembly method,
As the rotor shaft, in a position adjacent to the front Symbol connecting portion, using a rotor shaft locking groove is kicked set,
As a support jig for supporting the rotor shaft, a locking support portion provided at a thickness and depth that slides inside the locking groove is provided, and the locking groove of the rotor shaft is formed. Using a support jig in which the length dimension from the position where the locking support portion is formed to the lower end face is set longer than the length dimension from the position to the lower end face of the rotor shaft,
Wherein the locking support portion of the support jig engaged to support the rotor shaft standing is allowed to Ritsu lifting by the supporting jig into the locking groove,
And aligning and connecting portion of the rotor shaft and the coupling hole of the rotor, while supporting the rotor shaft by the support jig, and the rotor shaft and the rotor by press-fitting or caulking operation A method for assembling an assembly of a rotor of a motor, wherein the assembly is fixed. As the rotor shaft, using a rotor shaft provided with a locking groove that goes around the outer peripheral surface of the rotor shaft,
As the support jig, use a pair of support jigs formed in a semi-cylindrical shape,
When raising and supporting the rotor shaft so as to be suspended by the support jig,
The support jig is disposed so as to sandwich the rotor shaft from both sides, and the locking support portions of both of the support jigs are engaged over the entire circumference of the locking groove to support the rotor shaft. The method of assembling a motor rotor assembly according to claim 1 .

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