JP3010617U - Cup type motor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an inexpensive cup-type motor that can easily and reliably prevent vibration without tightening the machining accuracy of parts or using a spacer. A rotor 6 is rotatably arranged in a central portion of an outer cup 1 having one opening, and a yoke 4 around which a coil 5 is wound is provided around the rotor 6 so that the outer cup 1 is opened. In a cup type motor configured to be sealed with a flange 2, a leaf spring 3 having a thin base portion is attached to the opening side flange 2 and the tip of the leaf spring 3 has a flange portion 4a of the yoke 4.
It is provided so as to come into contact with. Further, the opening side flange is provided with a leaf spring 3 having a narrowed plate width at the base so that the tip of the leaf spring 3 abuts on the collar portion 4a of the yoke 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cup-type motor, and more particularly to a motor vibration prevention structure.

[0002]

[Prior art]

 Conventionally, in this type of motor, a rotor is rotatably arranged in the center of an exterior cup having one opening, and a yoke around which a coil is wound is provided around the rotor. It is assembled by closing the inside of the outer cup by pressing the inner part from above at the time of this closing.

However, if there are variations in the processing accuracy among the parts, a slight gap may occur between the yoke located at the top of the exterior cup and the opening side flange during assembly, and this gap causes the interior to Incomplete pressing of parts causes vibration. In particular, the tendency is remarkable when the motor is an intermittent drive such as a pulse motor, and the performance of the motor is greatly affected.

In order to prevent such inconvenience, measures have been taken such as strictly controlling the processing accuracy of each component so that no gap is created during assembly, or filling the gap created using a spacer.

[0005]

[Problems to be solved by the device]

 However, if the processing accuracy of each part is strictly controlled as described above, not only the cost of parts will increase, but also the number of inspection man-hours for that purpose will increase. Since the gaps are different, the operator must adjust the number of spacers to be inserted and the plate thickness each time, resulting in a large increase in the number of assembly steps and an increase in cost.

An object of the present invention is to solve the above-mentioned inconveniences and to provide an inexpensive cup-type motor that can easily and reliably prevent vibration without increasing the machining accuracy of parts or using a spacer. Is.

[0007]

[Means for Solving the Problems]

 That is, in the present invention, the rotor (6) is rotatably arranged in the center of the exterior cup (1) having one opening, and the yoke (4) is formed by winding the coil (5) around the rotor (6). ), And a cup type motor in which the exterior cup (1) is closed by the opening side flange (2), the opening side flange (2) is a plate with a thinned base portion (3a). The spring (3) is provided so that its tip abuts on the collar portion (4a) of the yoke (4).

Further, in the present invention, the opening side flange (2) is provided with a leaf spring (3) having a narrow plate width of the base portion (3a), the tip of which is the flange portion (4a) of the yoke (4). It is provided so as to abut.

[0009]

[Work]

 With the above structure, in the present invention, when the exterior cup having the components such as the yoke, the coil and the rotor interposed therein is sealed by the opening side flange provided with the leaf spring, the leaf spring is slightly moved between the yoke and the opening side flange. Bend through the appropriate gap and press the yoke with an appropriate spring load to securely fix all interior parts to the exterior cup.

Further, the elasticity of the leaf spring absorbs rotational vibration and electromagnetic vibration (vibration generated by resonance) of the component, and the vibration of the motor is significantly reduced.

[0011]

【Example】

 FIG. 1 is a sectional view showing the structure of a cup type motor according to the present invention.

As shown in the figure, a rotor 6 having a motor shaft 8 attached to the center thereof is rotatably arranged, and a thread winding type yoke 4 around which a coil 5 is wound with a constant gap is provided around the rotor 6. It is installed around. These parts are mounted in the exterior cup 1 and then sealed by the opening side flange 2 to be assembled. At this time, the motor shaft 8 has the bearing 7 between the closing side flange 9 and the opening side flange 2. At the same time, the opening side flange 2 presses the flange portion 4a of the yoke 4 to fix all the interior parts.

By the way, a leaf spring 3 is provided on the periphery of the opening side flange 2, which is a feature of the present invention. That is, as described above, the motor has the components such as the yoke 4, the coil 5 and the rotor 6 interposed therein, and then the opening side flange 2 is fitted into the stepped portion of the outer cup 1 and the outer cup 1 is inserted into the outer cup 1. It is sealed by caulking at the outer periphery, but at this time, a small gap T (for example, about 0.2 mm to 0.5 mm) is provided between the opening side flange 2 and the collar portion 4a of the yoke 4, The leaf spring 3 presses the collar portion 4a through the gap T.

In the present embodiment, the opening side flange 2 is a disk having a plate thickness of about 0.8 mm in consideration of the strength of the motor, and as shown in FIGS. This is a structure in which two leaf springs 3 which are formed by bending the inward of the tongue piece and bending it slightly inward are arranged opposite to each other. In addition, since the spring load of this plate spring 3 is excessive when the plate thickness of the original plate is the same, a recess 3b is formed on the bent side of the base part 3a in order to obtain an optimum spring load. The depression 3b can be easily formed by a chamfering technique.

In the present invention, the wall thickness of the base portion 3a is adjusted according to the degree of chamfering so that an appropriate spring load can be obtained according to the type of motor to be manufactured. In the case of this embodiment, The thickness of the original plate is set to about half (0.4 mm depression), and the spring load is set to 3 Kg to 10 Kg when the bending amount of the leaf spring 3 at the time of sealing is 0.3 mm ± 0.1 mm. ing.

Further, in the present embodiment, the leaf spring 3 is illustrated as being arranged at the peripheral edge of the opening side flange 2, but the present invention is not limited to this, and for example, as shown in FIG. Similar effects can be obtained by disposing it in the middle of the opening side flange 2 as shown in (b). In short, any position may be used as long as the tip of the leaf spring 3 can come into contact with the collar portion 4a of the yoke 4 at the time of sealing. Further, the base portion 3a provided for adjusting the spring load need not be formed with the recess 3b as in the above-described embodiment, and the base portion 3a of the leaf spring 3 is formed with a constriction 3c as in the embodiment shown in FIG. A floating island shape can also be applied. In this case, the plate width of the base 3a is adjusted according to the degree of constriction to obtain an appropriate spring load. In this case as well, the leaf spring 3 is formed by bending it slightly inward.

Further, in the present embodiment, the example in which the two leaf springs 3 are provided is illustrated, but the present invention is not limited to this, and if there is at least one leaf spring 3, it is effective for vibration isolation. Act on. Therefore, the leaf spring 3 may be provided effectively as appropriate according to the size and output of the motor.

As described above, in the cup-type motor according to the present invention, the leaf spring 3 absorbs the gap T between the yoke 4 located at the uppermost portion in the exterior cup 1 and the opening side flange 2, and the yoke is provided at the tip thereof. Since the interior parts are fixed by pressing the collar portion 4a of No. 4, it is possible to absorb the variation in the gap T caused by the processing accuracy of each part by the amount of bending of the leaf spring 3. , The interior parts can always be firmly fixed with a constant spring load. Moreover, the elasticity of the leaf spring 3 effectively absorbs the rotational vibration and electromagnetic vibration of the interior parts, so that the vibration of the motor can be significantly reduced.

[0019]

[Effect of device]

 As described above, according to the present invention, when the exterior cup having parts such as the yoke, the coil, and the rotor interposed therein is sealed by the opening side flange, the leaf spring provided on the opening side flange makes the yoke an appropriate spring. Since the interior parts are fixed by pressing with a load, it is necessary to strictly manage and check the parts accuracy as in the past to eliminate gaps during assembly, and insert spacers into the gaps to create gaps. There is no need for a troublesome work process such as eliminating the problem. As a result, the cost of parts is reduced, the number of assembly steps is significantly reduced, and the cost can be reduced.

Further, since the leaf spring 3 effectively absorbs the rotational vibration and electromagnetic vibration (vibration generated by resonance) of the interior parts, the vibration of the motor is significantly reduced and the performance is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a cup type motor according to the present invention.

2A and 2B are diagrams showing an opening side flange, FIG. 2A is a plan view, and FIG.
Is a sectional view thereof.

3A and 3B are views showing an opening side flange different from FIG. 2, and FIG. 3A is a plan view and FIG. 3B is a sectional view thereof.

[Explanation of symbols]

 1 Exterior Cup 2 Open Side Flange 3 Leaf Spring 3a Base 4 Yoke 4a Collar 5 Coil 6 Rotor

Claims (2)

[Scope of utility model registration request] 1. A yoke (4) in which a rotor (6) is rotatably arranged in the center of an exterior cup (1) having one opening, and a coil (5) is wound around the rotor (6). The outer cup (1) around the opening side flange (2)
In the cup type motor configured to be sealed by means of the above, a leaf spring (3) having a thinned base portion (3a) is provided on the opening side flange (2), and a tip of the leaf spring (3) has a flange portion (4a) of the yoke (4). A cup type motor that is provided so as to come into contact with the. 2. A yoke (4) in which a rotor (6) is rotatably arranged in the center of an exterior cup (1) having one opening, and a coil (5) is wound around the rotor (6). The outer cup (1) around the opening side flange (2)
In the cup-type motor configured to be sealed by means of the above-mentioned method, in the opening side flange (2), a plate spring (3) having a narrow plate width of the base portion (3a) is provided, and the tip of the leaf spring (3) has a flange portion (4a) of the yoke (4). A cup type motor that is provided so as to come into contact with the.