JPS6313047B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible joint for elastically connecting two rotary bodies, particularly shafts, which are connected to each other by a plurality of elastic battens having fixing holes.

Many flexible joints for elastic power transmission are known. German Patent Specification No. 945199 discloses a flexible joint, a so-called "gibbon", in which the coupling element has a polygonal shape and the metal parts transmitting the shaft torque and connecting the shafts are vulcanized at the corners of the polygon. “Joint” (Guibo)
Kupplung). According to DE 24 10 165 A1, this polygonal rubber ring may furthermore be subdivided into individual rubber posts which extend in the circumferential direction and have groove-shaped recesses extending in the same direction.

A flexible joint having individual half-joints connected to one another with elastic battens is known from German Utility Model No. 74 115 132. The resilient battens consist of rope loops mounted around bushings that rotatably receive mounting bolts, the loops being held in an elliptical shape between the bushings by resilient compression bodies. The bushing for receiving the mounting bolt of one half-joint rests on an inner arc, and the bushing of the other half-joint sits exactly radially relative to said bushing in another arc of larger diameter. All the internal threaded bolts then secure the batten to the flange of the first half-joint, and all the external threaded bolts secure the batten to the flange of the second half-joint. The batten is therefore arranged radially with respect to the axis.

Although known flexible joints have rotational elasticity within a certain range and are movable in the longitudinal direction, the axial movement in known shaft joints is simply too low. Furthermore, the angular movements, ie the inclinations of the two rotational axes of the two coupled shafts, are too low in the previously known flexible joints. For example, in the coupling element of DE 945 199 the angular movement is approximately 14°. However, this is too small for many applications, especially when free joints are to be saved. Furthermore, the lateral movement of known shaft couplings is also too low, for example German Utility Model No. 7411513
No. lateral motion is not provided for the shaft coupling.

The problem underlying the invention is therefore to provide a flexible joint of the type mentioned at the outset, which has a particularly large longitudinal and angular movement, and also has rotational elasticity and lateral movement. Furthermore, this shaft joint uses a known elastic batten as is, has a simple structure, and is inexpensive to manufacture.

This problem can be solved by the present invention, in which the rotating body has at least two pawls on each of its opposing front surfaces, and the pawls are arranged in a circle around the rotational axis of the rotating body at equal intervals,
The pawls of the driving rotor engage between the pawls of the driven rotor, and each pawl of the motive rotor is coupled to an adjacent pawl of the driven rotor by at least one elastic batten; is solved in that the pawl is fastened on the outside of the pawl in the direction of rotation of the rotating body in a direction transverse to its axis of rotation by means of a threaded bolt extending transversely to the axis of rotation.

In a preferred arrangement of the invention for resiliently coupling two rotating shafts with opposite plane-parallel front faces, two 180° offset pawls are arranged on each front face of each shaft,
The pawls are interlocking and laterally opposed, and each pawl is connected to each adjacent pawl by a total of four elastic battens, the four battens forming a square shape. draw.

In a preferred embodiment, the elastic battens have an elongated cubic or elliptical shape and consist of a fibrous layer embedded within a rubber coating.

The flexible joint according to the invention has several advantages compared to shaft joints known from the prior art. The two rotary bodies, and in particular the two rotary axes, have a large mutual movement in the longitudinal direction, so that changes in the spacing can be compensated for without maintenance. The axial sliding travel under torque is a few centimeters and does not require the generation of large axial reaction forces, which are much smaller than those produced by prior art shaft couplings. . Furthermore, the shaft coupling according to the invention has a high angular movement that compensates for the deviation angles of the two rotational axes. The angle between the rotational axes of both rotating bodies or shafts is 30° or more. Furthermore, the shaft coupling according to the invention has lateral movement, so that small translational displacements of the two rotational axes with respect to each other can be compensated for. Another advantage of the shaft coupling according to the invention is that it is very simple in construction and installation. As a flexible joint element, the shaft joint according to the invention uses a known batten, which consists of a fiber layer or similar tensile-resistant material embedded in a rubber coating.

A further advantage of the shaft coupling according to the invention is that it provides all desired torsional properties. All that is required in this case is to select a correspondingly elastic batten and, for example, to select fiber layer filling materials with different shore hardnesses. Furthermore, since the shaft joint according to the present invention has an elastic batten interposed therein, vibrations can be completely blocked between both shafts or between both rotating bodies.

Accordingly, the present invention provides a flexible joint that exhibits a flexible joint in the axial direction, is compact, inexpensive, can be adjusted to desired torsional characteristics, and can be easily repaired and replaced.

Further details and advantages of the invention are explained in more detail in the following description on the basis of exemplary embodiments represented in the drawings.

The flexible joint shown in FIGS. 1 to 4 consists of rotating bodies 1 and 2, which in the illustrated example are rotating shafts.
The shafts 1, 2 rotate about central rotation axes 20, 22, which are preferably aligned. A flange 3, 4 is arranged at each end of the shafts 1, 2, which flanges have opposite, plane-parallel front faces 16, 17. On the front face 16 of the flange 3, as shown in FIG. 2, two claws 5 and 6 are arranged on a circle 21 centered on the rotational axis 20 and offset by 180 degrees from each other. Similarly, two pawls 7 and 8 are arranged on the flange 4 of the driven shaft 2 on a circle having the same radius as the circle 21 with the rotation axis 22 as the center.
As the flanges 3 and 4 approach each other as shown in FIG. 1, each time the claws of one flange come between the claws of the other flange, and the four claws form the four corners of a square. All pawls are preferably cubically configured or have at least two orthogonal outwardly facing surfaces 18, 19, which surfaces are coplanar with corresponding surfaces of adjacent pawls on the other flange. It is in. Screw holes 9 and 10 are provided inside these surfaces 18 and 19. Each pawl is connected to each adjacent pawl by an elastic batten 11, 12, 13, 14, and each pawl is acted upon by two battens. Therefore, there are four battens of this type. The batten forming the sides of the square describes a square in which the nails form the four corners. The battens 11, 12, 13, 14 are attached by screws 15 screwed into the screw holes 9, 10 of the claws. Therefore, when the driving shaft rotates, a tensile force is applied to the two opposing eye plates, and a pressure is applied to the two opposing eye plates.

It is of course also possible to provide more than four coupling elements or elastic battens. Each of the opposing front faces of the rotating body then has three or more pawls arranged at equal intervals on a circle about the axis of rotation of the rotating body. Again, each pawl is connected to each adjacent pawl by a resilient batten forming a hexagon or octagon. However, the pawls must be shaped so that they are suitable for securing the edges of each two butted battens.

In the case of the example shown in FIGS. 1 to 4, the batten extends in the direction of rotation based on its longitudinal axis, and is fixed to the pawl in a direction intersecting the rotational axis of the rotating body. Alongside this, it is also possible to mount the battens at an angle to the axis of rotation of the rotating body so that they can be pretensioned slightly obliquely. When the driving shaft approaches, the driven shaft is pulled forward by the tensile force. In this way, tensional or compressive strains in the shaft system can be compensated in an advantageous manner.

3 is a sectional view taken along line AA of the shaft joint in FIG. 4, and FIG. 4 is a view taken along line BB in FIG. 3. The difference in the direction of the diagonal lines between the two upper claws 5 and 7 means that the claws are on different flanges. The claws are constructed as angles. Furthermore, all four elastic battens are visible in this figure.

According to the present invention, the rotating bodies 1, 2 each have at least two pawls on the opposite front faces 16, 17, and the pawls are arranged at equal intervals along the rotational axes 20, 22 of the rotary bodies.
The driving rotating body 1 is arranged on a circle 21 centered on
The respective claws 5, 6 are engaged between the two claws 7, 8 of the driven rotating body, and the elastic battens 11, 12, 13, 14
Each pawl of the driving rotor is connected to an adjacent pawl of the driven rotor by at least one of the following, and the eye plate is connected to the outer side of the pawl by a threaded bolt extending transversely to the axis of rotation of the rotor. By being fixed in the direction that intersects the axis of rotation in the direction of rotation, it has great flexibility in longitudinal movement (movement in the direction of the rotation axis) and angular movement (inclination of both rotation axes). A flexible joint is provided that has rotational (torsional) elasticity and lateral movement.

That is, elastic battens 11 to 14 connect the two halves of the flexible joint, the driving rotor and the driven rotor.
With the above configuration, it is possible to displace the two halves of the joint in the direction of the rotational axis or to tilt them without any problem. First of all, for relative axial movements, it is only necessary to deflect the elastic battens relative to the threaded bolt 15. On the other hand, an angular movement, ie a tilting of the two rotational axes, requires that the elastic batten itself be twisted. Deformations of these two elastic battens can easily be carried out without problems in the flexible joint of the structure of the invention, and high torsional moment transfers are possible.

The shaft coupling according to the present invention has a wide range of application, where torque must be transmitted elastically, such as in vehicles,
It can be successfully used anywhere - in boat building or as a coupling link in a generator. In this case, both shaft ends may be provided with commercially available flanges, and the shaft coupling according to the invention need only be flanged on both sides.

Furthermore, according to the invention, each two elastic battens can be arranged parallel to each other, so that larger torques can be transmitted and the properties of the shaft coupling can be additionally changed.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the shaft joint, and the uppermost elastic batten is omitted to show the upper two pawls. FIG. 2 is a front view of the flange of a driving shaft (or driven shaft) with two pawls offset by 180°. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 4. Figure 4 is Figure 3 B-B
FIG. 1... Driving rotating body, 2... Driven rotating body, 5, 6,
7, 8...Claw, 9,10...Through hole, 11,12,1
3, 14...Elastic batten, 16, 17...Front, 20,
22...rotation axis, 21...circle.

Claims (1)

[Scope of Claims] 1. In a flexible joint that elastically connects two rotating bodies, especially shafts, which are connected to each other by a plurality of elastic battens having fixing holes, the rotating bodies 1 and 2 are connected to each other by a plurality of elastic battens having fixing holes. 16 and 17 each have at least two claws 5,
6; 7, 8, the pawls are arranged on a circle 21 centered on the rotation axes 20, 22 of the rotary body at equal intervals, and the pawls 5, 6 of the driving rotary body 1 are arranged on a circle 21 centered on the rotation axes 20, 22 of the rotary body 1. engaging between the claws 7 and 8; and an elastic batten 11;
each pawl of the driving rotor is coupled to an adjacent pawl of the driven rotor by at least one of 12, 13, and 14;
A flexible joint characterized in that the batten is fixed on the outside of the pawl in the direction of rotation of the rotating body in a direction that intersects with the axis of rotation by a threaded bolt 15 that extends in a direction transverse to the axis of rotation. 2. In the flexible joint according to claim 1, which elastically connects two rotating shafts having parallel front faces, two pawls are provided on each front face 16, 17 of each shaft 1, 2, which are offset by 180°. 5, 6; 7, 8 are disposed, and the claws engage with each other and face laterally, and a total of four elastic battens 11, 12,
A flexible joint characterized in that each pawl is connected to each adjacent pawl by 13 and 14, and the four battens form a square shape. 3. The elastic batten 11, 12, 13, 14 has a vertically elongated cubic or elliptical shape and is composed of a fiber layer, and the fiber layer is fitted into a rubber coating, or The flexible joint according to paragraph 2. 4. The elastic battens are inclined and pretensioned with respect to the axis of rotation of the rotating body or shaft, so that when the driven rotating body moves towards the driving rotating body, a force is generated in the axial direction, thereby causing play. Flexible joint according to any one of claims 1 to 3, characterized in that movement in the axial direction is guaranteed without any friction. 5. A flexible joint according to claim 1, characterized in that each two elastic battens are arranged parallel to each other.