JPS5813138Y2 - Kouzou - Google Patents

Description

[Detailed explanation of the idea] This invention relates to the structure of a self-aligning bearing.

Various types of bearings are used to support rotating shafts, and it is already well known that self-aligning bearings, for example, are used as a means to specifically counter vibrations.

Figures 1 and 2 show examples of self-aligning bearings (hereinafter referred to as "bearings" for convenience) that support the rotating shaft of a t-ter. FIG. 2 shows a front view of the motor as seen from the inside, and FIG. 2 shows a side sectional view taken along the line ■-■ from FIG. 1, respectively.

Hereinafter, conventional embodiments will be described using a motor as an application example.

In FIG. 2, a shaft 1 has one end supported by a bearing 2, and the other end, not shown, is supported by another bearing.

A bearing case, ie, a motor case in this case, has one curved surface of a bearing body 4 having a spherical peripheral surface in the center of a side wall 3a that is substantially perpendicular to the shaft 1. A receiving portion 3b is formed for supporting the shaft 1 and having a hole for removing the shaft 1.

Inside the motor case 3, a plurality of tongues 3c are formed by punching out the side wall 3a in a window shape and radially, and bending the punched portions to form a tongue shape, leaving a certain gap between them and the side wall 3a. It is formed to have.

The leaf spring 5 having a predetermined elastic modulus has a support in the center part of the side wall 3a which faces the part 3b and which supports the other side of the bearing body 4 which is constructed in the same manner as the part. Part 5
a is formed.

Furthermore, as shown in FIG. 1, a plurality of leg portions 5b are formed around the leaf spring 5, and a slit 5d is formed from the receiver portion 5a toward the leg portion 5b.

In FIG. 1, bent pieces 5 are bent toward the front side from the plane of the paper at both ends of the leg portions 5b.
c is formed.

The plate spring 5 is supported by the tongue piece 3c so as not to move in the direction of rotation of the shaft 1 by sandwiching the tongue piece 3c between the two bent pieces 5c.

In this way, the bearing body 4 is supported by the motor case 3 and the leaf spring 5. Although the elastic strength is increased by bending both the end corners of the legs 5b of the leaf spring 5, the spring material is generally Processing distortion occurs due to bending, and the surrounding area becomes rigid, increasing rigidity and strength, which may impair its elastic action.

In fact, in conventional bearings configured in this way, the vibrations of the rotating shaft are not absorbed <<, which causes play between the leaf spring and the bearing body in the motor case, and also causes fatigue of the leaf spring. The phenomenon reduces its elasticity.

Moreover, since the width of the tongue piece 3C is narrower than the width of the leg part 5b, when the leg part 5b is supported by the tongue piece 3C, the center part 5b of the leg part 5b
is pressed against the motor case side wall 3a by the tongue Hc, but both sides 5b of the leg 5b are not supported by the tongue 3c.
〃 will float above the side wall 3a, causing warping.

In other words, the leg portion 5b is suspended by the intermediate tongue piece 3C) 5d
It will be bent around the center.

As a result, the bearing part 5a of the leaf spring 5 draws a small-diameter circular arc centered on the bearing body 4, so that the bearing part 5a's corner part 5a' facing the sulin) 5d bites into the bearing body 4. Therefore, the corner portion 5a' may catch on the bearing body 4 or damage the bearing body 4.

In this way, the alignment function is impaired, and the function as a bearing cannot be maintained, which has the disadvantage of having a serious impact on the rotating system.

The present invention eliminates the above-mentioned drawbacks and securely holds the bearing body without impairing the elastic action of the leaf spring.
An object of the present invention is to provide a self-aligning bearing capable of sufficiently absorbing the vibration of a button shaft during rotation.

An embodiment of the present invention will be described below with reference to the drawings.

3 and 4 show a self-aligning bearing according to an embodiment of the present invention, of which FIG. 3 is a front view seen from below in FIG. ■- from Figure 3
■It is a side sectional view along the line.

In FIG. 4, in the center of the side wall 11a of the motor case 11, there is a portion 11 for the bearing body 4, as in the conventional embodiment.
b is formed.

Inside the motor case 11, a plurality of tongue pieces 11e bent in the same manner as in the conventional embodiment are attached to the side wall 11.
a with a certain gap between them.

As shown in FIG. 5, this tongue piece 11e has a bent portion 11d formed by bending both side edges of the tongue piece 11c toward the side wall 11a.

Note that the opposing gap between the bent portions 11d is the gap between the leg portions 1 of the leaf spring 12.
The width was set to be equal to or greater than the width of 2b.

As shown in FIG. 4, the bearing part 12a for supporting the bearing body 4 of the leaf spring 12 is constructed in the same manner as in the previous embodiment, and the surrounding part of the leaf spring 12 is as shown in FIG. A plurality of leg portions 12b are formed on the holder, and furthermore, a sling N2c is formed from the receiver portion 12a toward the leg portion 12b.

As shown in FIG. 3, this leg portion 12b
By fitting 1C very loosely, the leaf spring 12 is supported by the tongue piece 11e so as not to move in the direction of rotation of the shaft 1.

In this way, the bearing body 4 is supported by the spring plate 12 and the bearing part 11b of the motor case 11.
Since the leg portion 12b is plate-shaped and does not have a bent portion as in the conventional embodiment, the elastic action of the leaf spring 12 is impaired or not, so that vibrations of the shaft cannot be sufficiently absorbed. can.

Since the bent leg portion 12b is supported by the tongue piece 11C across the gold mine, the leg portion 12b is supported by the center portion 12b' as in the conventional example.
Since the receiver is not bent over both side portions 12b, the portion 12a of the receiver does not deform.
Since the corner part 12a' of part a does not get caught on the bearing body 4 or damage the bearing body 4, the bearing supports the bearing body 4 with uniform elastic force around the entire circumference of the part 12a, and the alignment is achieved. No loss of functionality.

In addition, according to this embodiment, since there is no need to increase the number of parts, it is advantageous in terms of manufacturing costs.

As described above, according to the present invention, since the load on the legs of the leaf spring is not locally concentrated, there is no local deformation of the spring leaf due to stress concentration, and the deformation causes the bearing to Since the bearing body is not damaged and the alignment function of the bearing is not damaged, the bearing body is held securely without damaging the elastic action of the leaf spring, and the function as a self-aligning bearing is maintained. able to demonstrate.

[Brief explanation of drawings]

Fig. 1 shows an example of a conventional self-aligning bearing; Fig. 2 is a front view seen from inside the motor case, Fig. 2 is a side sectional view taken along the line ■-■ from Fig. 1, and Fig. 3 is a , showing one embodiment of the present invention, is a front view seen from inside the motor case,
FIG. 4 is a side sectional view taken along the line ■--■ from FIG. 3, and FIG. 5 is a perspective view showing the shape of the tongue of the motor case of the present invention. 4... Bearing body, 11c... Tongue piece, 11
d...Bent part, 12...Plate spring, 12b...Leg part.

Claims (1)

[Scope of utility model registration request] A bearing part of the bearing body is formed on a side wall that is substantially perpendicular to the axis of the bearing case, and tongue pieces having gaps between the bearing part and the side wall are formed at a plurality of places around the part. After receiving the bearing body at the bearing part, a leg part of a spring having a central part facing the bearing part and another bearing part facing the said gap is faced,
In a self-aligning bearing in which a bearing body is held between the bearing case and a leaf spring, the width of the tongue piece is equal to or greater than the width of the leg of the leaf spring, and
The legs of a leaf spring are formed by bending both side edges of the tongue toward the side wall to form the tongue in a U-shape, and forming a slit in the center of the tongue toward the legs. The structure of a self-aligning bearing is characterized by an interlocking structure.