JPH0488211A - Flexible coupling shaft - Google Patents

Abstract

PURPOSE:To connect shafts which have a little dislocation and angle to each other by arranging element bodies where a tension member is wound many times while being sandwiched by element bodies where the tension member is wound not so many times, and arranging the bodies in a true even polygonal shape, thereby eliminating decomposition of the tension members, and reducing the weight. CONSTITUTION:Element bodies 10 each having a large amount of tension member 10 wound between flanged collars 14 is integrated with rubber elastic bodies 12 each having a small amount of tension member 10 by means of rubber elastic bodies 15, while the bodies are hexagonally arranged by inserting connecting pins 16 into the collars 14. The elements 10 and 12 are alternately combined, while the elements 12 sandwich the elements 10. Shafts having a little dislocation and angle are connected to each other accordingly, without the decomposition of the tension members 11 and deformation of installing bolts.

Description

[Detailed Description of the Invention] (Field of Application) The present invention relates to a flexible shaft joint for power transmission interposed in a propulsion shaft, etc., which connects one shaft and the other shaft and transmits rotational force. It is.

Specifically, it is used to connect a propeller shaft that transmits the driving force of an engine, a steering shaft that transmits the rotational force of a steering wheel, etc.

(Prior art) The rotational force used for propulsion of automobiles, etc. is produced by -J15t having opposing flanges on both the drive side and driven side shafts, and a joint interposed between the flanges. Examples include those shown in FIGS. 1 and 2.

The one shown in FIG. 1 is a so-called one-piece shaft coupling, while the one shown in FIG. 2 is an element-type shaft coupling.

Each of these has four or six mounting holes 1.2 for mounting on a flange (not shown) provided on the shaft, respectively.
Every other one is attached to the flange alternately.

On the ward side, the case with 6 mounting holes is shown, but 1a, 1b, 1
c is attached to the driving side, 2 a - 2 b s 2 c is attached to the driven side, and the collar 3 that forms these adjacent mounting holes
．． A tensile member 4 made of organic fiber is wrapped between the parts 3 and 3.

A joint in which these are all surrounded by a rubber elastic body 5 is called an integrated shaft joint, and a joint in which a pair of collars 3 and a tensile member 4 are surrounded by a rubber elastic body 5, and which are used in combination is called an element-type shaft joint. That is what it means. In the figure, 7 is a connecting pin that constitutes the mounting hole.

Now, these shaft joints are mainly used for drive shafts, but since the parts where they are used are extremely important, the required performance is also severe.

This type of shaft coupling not only simply transmits power to the other, but also, for example, in some cases, two shafts face each other at a slight angle, and in the case of a one-piece shaft joint, the entire shaft is made of rubber elastic material. Since the tensile member 4 is surrounded, there is a drawback that the tensile member 4 cannot properly follow the deformation due to the presence of wasteful rubber around the tensile member when rotating at this angle.

In addition, in the case of an integral shaft joint, it is necessary to set a number of assembly bodies of collars and tensile bodies in the mold, and the tensile bodies may come apart during this process, resulting in There were cases where the tension and durability performance of the rubber could not be achieved, and on the other hand, there was also the drawback that the weight increased because the entire structure was surrounded by a rubber elastic body.

On the other hand, element-type shaft joints are advantageous in that the tensile members are less likely to come apart during the manufacturing process and wasteful rubber is not used.

However, although the element-type shaft joint is superior in the above-mentioned respects, the drawbacks of the element-type shaft joint shown in FIG. 2 remain. For example, depending on where it is used, it is used in a fairly high temperature atmosphere, so the organic fiber tensile material embedded in the rubber elastic body tends to shrink due to heat, which causes the bolts attached to the flange to bend. There are drawbacks.

FIG. 3 shows a cross section taken along the line A-A in FIG. The flange 6 is pulled by the tension member 4.4 in the direction of arrows X and Y, respectively.
The force of the fourth tensile member on the far side is stronger (because of this, the bolt is bent in the direction of arrow Y).

(Objective) In view of the above points, the present invention provides an improved structure of an element-type shaft joint, and aims to improve the drawbacks of the element-type shaft joint described above.

(Configuration) The present invention employs the following configuration to achieve the above objectives.

In other words, two flanged collars are arranged at a constant interval, a tensile material is wound between the pair of collars, and the element body is surrounded by elastic rubber, and the element body is connected to a regular-even square shape using a connecting pin. In a flexible shaft joint for power transmission assembled in The edge is one element of the former and two elements of the latter.
A flexible shaft joint for power transmission, characterized in that the latter elements are arranged to sandwich the former elements, and preferably the tensile elements are wrapped around each other. In an element body with a large number of tensile members and an element body with a small number of tensile wrappings, the number of wrappings of the former is approximately 2 of the number of wrappings of the latter.
This invention relates to a flexible shaft joint for power transmission, which is characterized by a double diameter.

The tensile material used here is generally an organic fiber such as polyamide fiber, polyester fiber, rayon fiber, etc., and aromatic polyamide fiber can also be used.

(Function) In the present invention, since the flexible shaft joint is composed of element bodies, these elements are handled separately and vulcanized in rubber, so that the tensile body is separated. There will be no injury and its characteristics will exhibit the desired characteristics.

Therefore, since the amount of rubber elastic body can be reduced as an element body, the weight of the shaft joint as a whole can be reduced.

Element bodies with such excellent properties are combined into a predetermined structure, but because the tensile stress applied from the tensile body of each element body to one connecting pin by heat shrinkage is approximately the same, Bolts etc. that pass through this will not be deformed, and another feature is that there is no rubber elastic body interposed between the tensile bodies on the sides of the shaft joint, which is constructed by arranging a pair of element bodies. Therefore, even if the shafts to be connected have a slight angle with each other, the deformation can be easily followed.

(Examples) The present invention will be explained in detail below using examples.

FIG. 4 is a front view of the element-type shaft joint of the present invention, FIGS. 5 and 6 are perspective views of the element body thereof, and FIG. 7 is an enlarged cross-sectional view taken along the line B--B in FIG. 4.

In the figure, numeral 10 is an element body with a large number of tensile members 11 wrapped around it, and 12 is an element body with a small number of wraps of the tensile member 11, which is wrapped between collars 14 and 14 with flanges 13. These are integrated and surrounded by a rubber elastic body 15. The reference numeral 17 in the figure indicates the rubber elastic body 15 between the collars 14 and 14. This is a recess provided in the

The shaft joint on the side is assembled into a regular hexagon by inserting a connecting pin 16 into a collar 14, and the element bodies 10 and 12 are alternately combined, and in particular, the element body 12 is assembled with the element body 1o A connecting pin 16 is inserted between the two as a pair.

In this example, the tensile body 11 used in the element body 10
The number of tensile members 110 wrapped around the entire circumference of the shaft joint of the present invention is approximately twice the number of wrapped members 110 of the element body 12.
The number of windings is almost uniform.

Therefore, almost uniform tensile stresses X, Y (arrows) are applied to the connecting bolts (not shown) etc. due to heat contraction of the tensile member 11, so that deformation does not occur (furthermore, the element members 12 are not connected as a pair). On the side used, the distance between the tensile members 11 (Z
) Since there is no rubber elastic body and the recess 17 is provided, there is a degree of freedom in its movement, and it can be used even if the shafts are slightly misaligned or at an angle.

(Effects) As described above, the present invention has the characteristics that it is possible to reduce the weight of the shaft joint, eliminate the dispersion of the tensile material that directly affects the durability performance, and furthermore, it has the characteristics that the strength is almost uniform over the entire circumference of the shaft joint. Due to the number of tension members, there is no deformation of the bolts during installation.
It is especially useful for connecting shafts that are slightly misaligned or angled.
Its industrial utility value is high.

Figure 4 is a front view of the element type shaft joint of the present invention, Figures 5 and 6.
The figure is a perspective view of the element body, and FIG. 7 is an enlarged sectional view taken along line BB in FIG. 4.

10... Element body with a large number of tensile bodies wrapped around it, 1
1... Tensile body, 12... Element body with a small number of tensile bodies wrapped around, 13... Flange, 14... Collar 15... ...Rubber elastic body, 16...Connection pin, 17...
...Concavity, X, Y...Tensile direction, 2.
...-interval.

Patent applicant Brideston Co., Ltd.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional integral shaft joint, Fig. 2 is a front view of a conventional element type shaft joint, and Fig. 3 is a sectional view taken along line A-A in Fig. 2. Figure 3 Figure 7

Claims (2)

[Claims] (1) Two flanged collars are arranged at a constant interval, a tensile material is wrapped between the pair of collars, and an element body having a structure in which these are surrounded by elastic rubber is connected to a regular-even angle using a connecting pin. In a flexible shaft joint for power transmission assembled into a shape, two types of elements are used as the element body, an element body with a large number of tensile wraps and an element body with a small number of wraps, and the Each side is one element of the former and two elements of the latter.
1. A flexible shaft joint for power transmission, characterized in that the elements are arranged alternately, and the latter elements are arranged to sandwich the former elements. (2) In the element body with a large number of tensile bodies wrapped around it and the element body with a small number of tensile bodies wrapped around it, the number of windings of the former is approximately twice the number of windings of the latter. A flexible shaft joint for power transmission according to claim 1.