JPS6344578Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the improvement of a so-called universal flange used for supporting shaft ends, etc. By making the support flange made of plastic, assembly is facilitated, assembly accuracy is improved, and manufacturing is facilitated. This invention relates to a plastic universal flange that reduces costs.

In general, this type of universal flange has symmetrical support flanges 1 and 2 formed by press-forming a steel plate arranged in an opposing manner, as shown in FIG. It is constructed by fixing the ends of flanges 1 and 2 by welding or caulking.

However, in the case of conventional all-purpose flanges,
Since the structure was as described above, the rolling surfaces 1a,
It is difficult to finish 2a precisely, and
The drawback is that the sliding properties of the rolling surfaces tend to deteriorate due to assembly errors, and troubles such as noise and heat generation occur frequently.

Also, during welding and caulking, metal powder may be deposited on the rolling surface 1.
There is a risk of intrusion into the insides of a and 2a, a separate cleaning step is required, and it is also necessary to apply anti-rust treatment to the rolling surfaces, making it difficult to reduce manufacturing costs.

The present invention aims to solve the above-mentioned problems with conventional metal universal flanges.
The support flange is molded from a plastic material with excellent corrosion and abrasion resistance, and appropriate concave and convex portions are formed on both support flanges that are combined and welded facing each other. The purpose of the present invention is to provide a plastic universal flange that facilitates the assembly process of the universal flange and improves assembly accuracy by forming grooves, thereby making it possible to reduce noise and significantly reduce manufacturing costs. It is something.

Hereinafter, the details will be explained based on each embodiment of the present invention shown in FIGS. 1 to 17.

1 to 7 show a first embodiment of the present invention. In the figures, 5 and 6 are first and second support flanges that constitute a universal flange, and are made of hard nylon or polyester. It is symmetrically formed by integral molding of engineering plastic with excellent corrosion and abrasion resistance such as acetate. In each figure, 7 and 8 are rolling surfaces, 9 is a flange mounting hole, 10 is a recess drilled in the joint surface 5a of the first support flange 5, and 11 is a recess formed in the joint surface 6a of the second support flange 6. The homogeneous and integrally protruding convex portion 17 is a tapered circumferential groove formed around the concave portion 10 facing the joint surface 5a of the first support flange 5.

The rolling surfaces 7 and 8 are formed in the outer periphery of circular holes 5b and 6b bored in the center of the joint surfaces 5a and 6a of the support flanges 5 and 6 in a state that bulges outward.
Its inner surface is spherical.

The concave portion 10 and the convex portion 11 are connected to both support flanges 5 and 6.
The convex portion 11 is formed to fit into the concave portion 10 when the two are folded inward and assembled. That is, by fitting the convex portion 11 into the concave portion 10, the facing positions of both the rolling surfaces 7 and 8 are accurately regulated, and the opposing positions of both the rolling surfaces 7 and 8 can be precisely regulated without using a special jig. The support flanges 5, 6 can be assembled.

The circumferential groove 17 has the function of smoothing the fitting of the convex part 11 into the concave part 10 when the support flanges 5 and 6 are combined, and also allows part of the convex part 11 to melt and flow into this part when welding them together. It performs the function of making things easier.

In this embodiment, two pairs of circular concave portions 10 and two pairs of cylindrical convex portions 11 that fit into the concave portions are provided, but the shapes of the concave and convex portions and the logarithm thereof may be changed as appropriate. Of course, it may be changed to . or,
The concave portion 10 is a through hole, and the cylindrical convex portion 1
1 is formed slightly longer, and the tip thereof forms a recess 10.
It may be made to protrude further outward.

FIG. 6 is a longitudinal cross-sectional view of a rotating body 13 used in the universal flange, which is constructed by cutting both sides of a plastic or steel ball and drilling a shaft insertion hole 12 in the center thereof. Outer surface 13a of rotating body 13
is finished into a spherical surface having substantially the same curvature as the rolling surfaces 7 and 8, and is formed with two annular oil grooves 13b that function as oil reservoirs. 12b is an annular oil groove formed on the inner surface 12a of the shaft insertion hole 12;
Like the annular oil groove 13b, it functions as a so-called oil reservoir.

Next, the assembly of the universal flange having such a structure will be explained.

First, as shown in FIG. 6, the rotating body 13 having the shaft insertion hole 12 is placed on the rolling surface 7 of the first support flange 5. Next, as shown in FIG. 7, the second support flange 6 on which the convex portion 11 is formed is folded inward through the fold line 14, and the convex portion 11 is folded into the first support flange 5.
The support flanges 5 and 6 are fitted into the recess 10 of the support flanges 5 and 6. Note that by fitting the convex portion 11 into the concave portion 10, both support flanges 5,
The rolling surfaces 7, 8 of 6 are accurately assembled at predetermined positions.

After the support flanges 5 and 6 have been assembled, the bonding surface 5a and the bonding surface 6a, and the concave portion 10 and the convex portion 11 are welded together using an ultrasonic welding method. Further, when the tip of the convex portion 11 is made to protrude outward from the concave portion 10, the protruding tip portion is also melted and fixed at the same time.

In the case of ultrasonic welding, as is well known, protrusions and corner portions are more likely to melt than flat surfaces with relatively large areas.
For this reason, the protrusion 11 tends to melt, and a portion of it melts, but since the circumferential groove 17 is provided, it flows there and is absorbed, causing the support flanges 5 and 6 to separate or It will not shift or get welded.

FIG. 8 shows a second embodiment of the present invention, in which a plurality of needle-like protrusions 15 are formed on the joint surface 6a of the second support flange 6. By providing the needle-like protrusion 15, the welding of the joint surfaces during ultrasonic welding can be performed more smoothly and reliably, and in addition, a clean welded finished surface can be obtained without melting of the molten resin. In addition, in FIG. 8, the needle-like protrusion 15 is provided only on one joint surface.
Although this is provided, it may be provided on both joint surfaces 5a and 6a.

FIG. 9 shows a third embodiment of the present invention, in which a joint surface 5a is used instead of the needle-like protrusion 15 in FIG.
By increasing the welding energy density applied to both joint surfaces 5a and 6a, the welding strength in ultrasonic welding is improved and the welded surface is smoothed. This is what I did.

10 to 17 show a fourth embodiment of the present invention.

First, the first support flange 5 and the second support flange 6 are formed separately, and the recess 10 provided in the first support flange 5 is recessed around the flange mounting hole 9, and the second Support flange 6
A convex portion 11 is provided to project around the flange mounting hole 9.

A circumferential groove 17 is formed on the outer periphery of the cylindrical convex portion 11. When the support flanges 5 and 6 are combined and welded, a part of the convex portion 11 melts and forms the circumferential groove 17. The support flanges 5 and 6 are provided so as to flow into the support flanges 5 and 6 in close contact with each other with high accuracy.

Further, an appropriate number of grooves 18 are formed on the bulging peripheral portion having the rolling surface 7 and the bulging peripheral portion having the rolling surface 8, respectively.
..., 18... are formed. In this example, 120
Three grooves are cut at each step.

The cut groove 18 is provided in order to maintain elasticity depending on the shape of the bulging peripheral part having a rolling surface, and even if a molding error occurs in both support flanges 5 and 6, the rotating body 13 can be maintained in a good condition. It has the function of holding it in place and preventing rattling.

In addition, in the second support flange 6, the fourteenth
As shown in the figure and FIG. 15, a rotation preventing protrusion 19 is provided on a part of the rolling surface 8. As shown in FIG. Correspondingly, a rotation stopper groove 20 is formed on the outer surface 13a of the rotating body 13, as shown in FIGS. 16 and 17, into which the rotation stopper projection 19 can be fitted loosely in the axial direction.

If placed in this manner, both support flanges 5 and 6 and the rotating body 13 are allowed to rotate relative to each other within a predetermined angle, but further rotation is prevented, and the shaft is inserted into the shaft insertion hole 12 of the rotating body 13. To prevent the rotating shaft and the rotating body 13 from rotating together, the support flanges 5 and 6 and the rotating body 13 are
It is possible to prevent burn-in between the two.

Of course, since the rotation stop projection 19 and the rotation stop groove 20 are loosely fitted, the centering movement of the rotating body 13 will not be hindered.

Since the present invention has the above-described configuration, it has many excellent effects as described below.

(1) Both support flanges are formed by integral molding of plastic, making it easy to mass produce, reducing weight and diversifying colors, and eliminating the need for anti-rust treatment on the rolling surfaces, significantly reducing manufacturing costs. This enables significant reductions.

(2) Since the first and second support flanges are symmetrical, mold manufacturing is easy.

(3) By forming a concave part and a convex part on the joint surfaces of both support flanges and fitting the concave part and convex part, both support flanges can be assembled while regulating the position of the rolling surface. As a result, assembly work becomes extremely easy and assembly accuracy is significantly improved.

(4) Both support flanges themselves are made of plastic, and their assembly accuracy is extremely high, so even though the rotating body is made of steel, noise during use can be kept to an extremely low level.

(5) Since the combination of both support flanges is fixed by ultrasonic welding, the fixing work is easier compared to the conventional steel plate flanges, and the rolling surface is not damaged during the fixing work. This is advantageous in terms of manufacturing costs and improving product quality.

(6) A circumferential groove is provided around the recess or protrusion facing the joining surface, so that a part of the molten material of the protrusion flows into this groove and is absorbed, thereby enabling both support flanges to be integrated in a tightly contacting state with high precision.

(7) When needle-like protrusions or depressions are formed on the joint surface, the welding strength during ultrasonic welding is increased, and an extremely smooth finished welded surface can be obtained.

As mentioned above, the present invention has extremely high practical utility.

[Brief explanation of the drawing]

FIG. 1 is a plan view before assembly of a support flange used in a plastic universal flange according to a first embodiment of the present invention, and FIG. 2 is a front view thereof;
Figure 3 is a sectional view taken along line A-A in Figure 1, and Figure 4 is a cross-sectional view of Figure 1.
FIG. 5 is a sectional view taken along line CC in FIG. 1. FIG. 6 is a partially vertical front view of the rotating body, and FIG. 7 is a front view showing the rotating body in the middle of being assembled with both support flanges. FIG. 8 is a perspective view of the second support flange according to the second embodiment of the present invention, and FIG. 9 is a perspective view of the first support flange according to the third embodiment of the present invention. 10 to 17 relate to a fourth embodiment of the present invention, in which FIG. 10 is a plan view of the first support flange, FIG. 11 is a vertical sectional view, FIG. 12 is a bottom view, and FIG. Top view of two support flanges, first
Figure 4 is a vertical sectional view, Figure 15 is a bottom view, Figure 16 is a vertical sectional view of both support flanges and the rotating body assembled, and Figure 17 is a diagram showing the rotation prevention protrusion and rotation provided on the second support flange. FIG. 3 is a cross-sectional view of a main part showing a loosely fitted state with a rotation stopper groove provided in the body. FIG. 18 is a longitudinal sectional view of a conventional steel universal flange. 5... First support flange, 6... Second support flange, 5a, 6a... Joint surface, 7, 8... Rolling surface, 10... Concave portion, 11... Convex portion, 13... Rotating body, 17...Surrounding groove.

Claims (1)

[Scope of utility model registration request] A first support flange made of plastic having a planar joint surface and a spherical rolling surface, and a first support flange also having a planar joint surface and a spherical rolling surface forming a symmetrical shape with the first support flange. A second support flange made of plastic, a plurality of recesses formed on the joint surface of the first support flange, and a convex portion integrally formed with the same material on the joint surface of the second support flange and fitted into the recesses. and a circumferential groove formed around a concave portion facing the joint surface of the first support flange or a convex portion facing the joint surface of the second support flange, and a spherical surface that conforms to the rolling surfaces of both support flanges. A rotating body having a shaped outer surface and supported by these, and configured so that the joint surfaces of both support flanges and the fitted concave part and convex part are welded and integrated. A versatile plastic flange featuring: