JPH0564536U - Flexible coupling - Google Patents

Abstract

(57) [Abstract] [Purpose] In a flexible coupling used for a joint portion of a propeller shaft or the like, the cord wound around the drive-side connecting element and the driven-side connecting element is improved in heat resistance and is prevented from loosening. The purpose is to [Structure] Driving-side and driven-side connecting elements (1),
In a coupling in which a cord (3) is wound around and coupled to (2) and these are embedded in an elastic material (4), a steel cord (5) is used as the above cord, and the steel cord (5) is used. The structure is characterized in that each element is tightly wound from the inner peripheral side to the outer peripheral side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an elastic joint used for a joint portion of a propeller shaft of an automobile and a transmission or a differential gear, for transmitting the power of the shaft and absorbing the vibration.

[0002]

[Prior Art]

 In propeller shafts and the like of automobiles, an elastic joint having a vibration absorbing ability is often used in the middle part of the propeller shaft so that torsional vibrations are not mainly transmitted to the driven device in the process of power transmission.

An example of this type of elastic joint is that disclosed in Japanese Utility Model Laid-Open No. 63-77130 issued to the applicant of the present application. These elastic joints include a cylindrical drive-side connecting element and Similarly, a plurality of cylindrical driven side connecting elements are arranged alternately at equal intervals on the circumference, and each adjacent connecting element is housed and held in the collar provided on the outer peripheral surface of the connecting element. It has a structure in which fibers such as polyester and rayon are wound in a strip shape and embedded in an elastic material such as rubber or synthetic resin.

In this elastic joint, a drive-side yoke whose one end is connected to the drive shaft is fixed to each drive-side connecting element by a bolt or the like, and a driven-side yoke whose one end is connected to the driven shaft is a bolt or the like. The driving-side yoke transmits the rotational torque of the driving shaft to the driving-side connecting element of the elastic joint via a bolt or the like, and the driving-side connecting element is This rotary torque is transmitted to the driven-side connecting element via the wound fiber bundle. The driven-side yoke fixed to the driven-side connecting element receives the rotation torque and rotates the driven shaft. At this time, the elastic material of the elastic joint enclosing each connecting element and the fiber bundle absorbs the torsional vibration of the drive shaft and the driven shaft.

[0005]

[Problems to be solved by the device]

 However, since the portion where the flexible coupling is used has a relatively high temperature and internal heat is generated due to torsional resonance, fibers such as polyester and rayon are used as the winding cord of the connecting element as described above. In the conventional flexible coupling described above, when the internal heat generation exceeds the melting point of the fiber used and is transmitted to each connecting element, it is considered that a part of the fiber is broken.

The present invention has been made in view of the above situation, and by finding a novel structure for the winding cord of the connecting element, it is possible to sufficiently cope with the above-mentioned accidental heat generation. The purpose is to prevent breakage of the winding cord.

[0007]

[Means for Solving the Problems]

 That is, the feature of the flexible coupling of the present invention that achieves the above-mentioned object is that a coupling is formed by winding a cord around each connecting element on the driving side and the driven side to connect them, and embedding these in an elastic material. A steel cord is used, and the steel cord is tightly wound around the connecting elements from the inner peripheral side to the outer peripheral side of each element.

[0008]

[Action]

 In the flexible coupling of the present invention having the above structure, the steel cord wound around each connection element absorbs the heat of each connection element, so that even if internal heat is generated due to torsional resonance, The cord does not break due to the heat. In addition, the torque on the drive side is transmitted to the driven side by the steel cord, but it is assumed that the steel cord may loosen slightly depending on the torque load state. By hanging it, it is possible to prevent the occurrence of looseness.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 is a front perspective view showing a flexible coupling according to an embodiment of the present invention, and FIG. 1 is a sectional view taken along the line AA of FIG. 2. This flexible coupling has a yoke (not shown) on a driving side. , Three cylindrical driving side connecting elements (1) ... (1), and three cylindrical driving side connecting elements (2) connected to a driven side yoke (not shown). (2) and the connection elements (1) and (2) are alternately arranged on the circumference at equal intervals. The adjacent connecting elements (1), (2) are connected to each other as shown by winding the cord (3) around the belt, and the cord (3) is also shown in FIG. It is covered with an elastic material (4) such as perforated disc-shaped rubber or synthetic resin.

In the present invention, a steel cord (5) is used as the cord (3), and the steel cord (5) is connected to the connecting elements (1) and (2) as shown in FIG. It is wound tightly with a constant tension of about 4 kg from the inner circumference side to the outer circumference side. As the steel cord (5), one having a high tensile strength is suitable, and those having a diameter of about 0.4 to 0.6 mm are suitable. In FIG. 1, (7) and (7) indicate collars, and the steel cord (5) is also wound around the collar having a U-shaped cross section in the same manner as described above.

In the flexible coupling of the embodiment of the present invention having the above-mentioned structure, the yoke is formed by the steel cord (5) wound around the connecting elements (1) and (2) on the driving side and the driven side. It is possible to absorb the heat generated by each of the connecting elements (1) and (2) caused by contact with the bolt or the like or by torsional resonance, and it is possible to dissipate the heat generated thereby and at the same time as the code ( 5) The rupture of itself due to the heat is prevented. Further, depending on the torque load condition, the steel cord (5), which does not stretch, may be loosened to some extent, but in the flexible coupling of the present invention, the steel cord (5) is tightly wound. Therefore, it is possible to absorb the looseness in the gap between the dense cords and the cords, thereby preventing the looseness of the cords (5).

The embodiment of the present invention has been described above. The winding tension of the steel cord (5) can be changed as appropriate, for example, a steel cord (5) having a diameter of 0.4 mm is used. In this case, a force of about 4 to 5 kg is particularly preferable for closely winding the steel cord while keeping the balance with the elastic material (4) and the like. Then, the density of the steel cord (5) is preferably about 50 to 70% in the cord winding area (6) shown in FIG.

[0014]

[Effect of the device]

 As described above, in the flexible coupling of the present invention, a cord is wound around each connecting element on the driving side and the driven side to be connected, and these are embedded in an elastic material. The steel cord is tightly wound around the connecting elements from the inner peripheral side to the outer peripheral side of each element, and the steel cord wound around each connecting element causes heat generation by friction or the like. By improving the heat resistance of the cord with respect to the connecting element, and by tightly winding the steel cord, the practical effect of preventing the loosening of the steel cord, which is expected due to the torque load condition, is achieved. Since it has a simple structure and is suitable for mass production, it is highly expected to have an economic effect in combination with the improvement in durability. That.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a flexible coupling according to an embodiment of the present invention.

FIG. 2 is a front perspective view of the same embodiment.

[Explanation of symbols]

 (1) Drive side connecting element (2) Driven side connecting element (3) Cord (4) Elastic material (5) Steel cord (6) Cord winding area (7) Color

Claims (1)

[Scope of utility model registration request] 1. A plurality of cylindrical drive-side connecting elements connected to the drive-side yoke and a plurality of cylindrical driven-side connecting elements connected to the driven-side yoke are arranged at equal intervals on the circumference. In a flexible coupling formed by alternately arranging and winding a cord in a band shape between adjacent connecting elements, and embedding these in an elastic material such as rubber or synthetic resin, a steel cord is used as the cord, A flexible coupling characterized in that a steel cord is tightly wound around each connection element from the inner peripheral side to the outer peripheral side of each element.