JPS63195420A - Synchronous rotary joint - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a synchronous rotary joint with two joint halves for axially elastically connecting two shaft parts.

Couplings of this type are primarily used in the field of motor vehicle drives. In this case, it is desirable to isolate axial vibrations in the region of the longitudinal axis and, in particular, the lateral axis, in order to reduce the vibrations transmitted to the cell. Otherwise, due to the axial stiffness of the drive line, the universal joint or spline connection cannot fully function under rotational torque loads.

Rubber joints for this purpose are flexible and do not provide bending support, ie cannot prevent radial movement of the shaft portion.

The reduction or isolation of the vibrations mentioned above is possible in part by means of flexible sliding joints, which tend to reduce noise, especially at low frequencies. At high frequencies, the isolation in the drive line is incomplete and the vehicle body vibrates. Under load, the resistance of the synchronous rotary joint to axial sliding increases, causing the drive line to stiffen axially and resulting in incomplete isolation of vibrations within the sliding joint.

The object of the present invention is to provide a synchronous rotary joint which can achieve axial elasticity for vibration isolation by simple means and which connects two shaft parts rigidly in bending and without slipping.

A first solution according to the invention is provided by a synchronous rotary joint with a wound disc that longitudinally elastically connects a ring-shaped joint part and a joint neck shaft connected to this part. A second similar solution is provided by a synchronous rotary joint comprising a longitudinally elastic perforated sleeve connecting a ring-shaped joint member and a joint neck shaft connected to the member.

The solution according to the invention provides a longitudinally elastic coupling part (preferably an outer coupling part) which is axially flexible at high rotational torque capacities and thus provides good isolation of axial vibrations. suggest. Special measures completely prevent buckling of the elastic coupling part in the coupling element when loaded with rotational torques.

In a preferred embodiment of the first solution, the membranous disc is rigidly connected to the joint neck shaft or to the outer joint part and has two membrane discs which limit the axial sliding and rotational movements and guarantee unbroken operation. Provided between rigid abutment elements. To ensure the flexible disk, corresponding stops can also be provided which limit excessive axial and torsional movements.

The membranous disk preferably consists of a simple circular metal plate, in particular with a partially circular or radial slit, which makes it possible to increase the possible axial length variation of the synchronous rotary joint when the disk diameter is relatively small.

In a further embodiment, a shock-absorbing and damping elastic element (in particular a rubber element or a plastic element) is provided between the rigid abutment element and the membrane disk. The elastic member is furthermore particularly suitable for adjusting the damping properties of the synchronous rotary joint according to the invention.

Another embodiment provides for at least one joint half to have two halves connected to each other by two ring-disc-shaped membranous discs.
the discs are arranged axially spaced apart from each other and perpendicular to the axis of rotation, and are connected to the first element in an internal area of the disc and to a second element in an external area of the disc; It is characterized by

Based on the action of the above-mentioned elements, both elements of each joint half can be interconnected essentially in a bending-rigid manner by means of a membranous disk without the use of special guiding or supporting elements, and without mechanical friction. A high axial elasticity of the joint is obtained with no movement. Based on the first embodiment, by pivoting to prevent idling, it is possible to apply the rotational torque to be transmitted to both membranous disks. In this case, parallel lines of force occur so that each membranous disk transmits approximately 1/2 the rotational torque. However, the entire rotational torque can be conducted in one membranous disk. In this case, the second membranous disk is separated in the rotational direction and receives only axial and essentially radial forces with respect to the elements of the joint half during bending loads.

The axial deformation of the membranous disk can be limited by intermediate rigid or elastic elements, with a corresponding gap resulting in a working range with low axial loads at low amplitudes. In this case, elastic elements can be provided to limit the axial sliding stroke and dampen the impact.

Preferably, the membranous disc is designed as a ring-disc element with a partially circular or radial slit for improved axial deformability. In this case, the slit can extend to the outer edge so that a star-shaped disc member is obtained.

According to another preferred embodiment, the wound disk can have intersecting metal plates essentially in a radial plane, which under rotational torque are subjected to tension primarily in a direction-dependent manner. .

In this case too, it is important that it be extremely stiff in the radial direction and flexible in the axial direction. In the preferred embodiment of the second solution, the longitudinally elastic sleeve is 45" with respect to the generatrix.
consisting of webs extending crosswise at an angle of . In this case, square or diamond-shaped sections are cut out from the cylindrical basic shape.

In another embodiment, the longitudinally elastic sleeve has multiple rows of circumferentially staggered circumferential slits characterized by a large length variation of the sleeve.

In the embodiment described above, an elastic element made of rubber or synthetic resin can also be provided between the rigid member, ie the joint neck shaft and the outer joint part; This type of material can also be placed in between.

Buckling of the joint in the area of the membranous disc can be effectively prevented by the abutment elements arranged slightly apart from each other on the outer joint part and on the joint neck axis. In the longitudinally elastic sleeve, a rigid abutment element fixed to the inner joint part or to the joint neck shaft can be provided at a slight axial and radial distance from the abutment element of another part. can. In this way, support is also provided that prevents buckling and thus failure of the elastic sleeve is avoided.

In order to protect the membranous disk or the longitudinally elastic sleeve against deformation failure due to buckling, in addition to the above-mentioned inner sleeve or outer sleeve, in particular the sleeve and the cervical shaft can be slid relative to each other in the axial direction. Further guide means in the form of can be coupled to the outer joint member and to the joint cervical shaft. To facilitate the pivoting of the cervical shaft in the sleeve, bushings or roller guides made of slippery material can be provided. In addition to the support means mentioned above, axial and torsional stops can also be provided between the rigid members, which prevent damage to the longitudinally elastic sleeve or membrane disk.

In a preferred embodiment of the solution according to the invention, for the sealing of the joint, it is connected to the joint neck shaft or to the outer joint part, which longitudinally surrounds the elastic element and which continues axially to another part. A closed protection device may be provided.

A preferred embodiment of the invention is shown in the drawings.

A synchronous rotary joint 1 is shown in FIG. In this case, the inner joint part 2 is connected to the plug-in shaft 5 via a spline 3 and a securing ring 4 as usual, while the outer joint part 6 is connected to a longitudinally elastic spring means. It is connected to the second shaft end 10 via a bell 9 which is acted upon by a sleeve-like support means 8 . The synchronous rotary joint includes balls 11 that engage in a known manner with the inner and outer joint members 2 and 6 for rotational torque transmission, and a ball cage 12 that approximately controls the balls during bending.

The synchronous rotary joint shown in FIG. 2 is composed of an inner joint member 2 including an insertion shaft 5, a ball 11, a ball cage 12, and an outer joint member 6, as in FIG. 1. A sleeve-like projection 13 is fixed to the outer joint member 6. In accordance with the first principle of the invention, a membrane disc 14, which is welded to the sleeve-like projection 13 on the outside and to the shaft end 10 on the inside, is provided as a longitudinally elastic spring means.

In FIG. 3, in the case of a synchronous rotary joint 1 having the same basic structure as that in FIG. A radial disk 16 is provided which has an outer sleeve 15 which covers the projection 13 so as to be slidable in the axial direction and which supports the outer joint member 6 against idling relative to the shaft end 10. For sealing the joint, a protective camp 17 is provided which surrounds the outer sleeve 15 and engages in the groove 18 so as to be axially movable.

FIG. 4 shows a membranous disk 14 having a central opening 9 for receiving the shaft end and partially circular slots 20 distributed circumferentially on different radii to improve the axial elasticity.

The discs for transmitting the rotational torque can be constructed in the form of a star or can be composed of metal plate pieces arranged crosswise like the spokes of a wheel.

FIG. 5 shows an elastic ring member 21 which damps the axial movement of the membranous disk in order to prevent impact and accompanying noise generation, and a stopper for the axial movement, which corresponds to FIG. 3. Eggplant disc 16 and membranous disc 1
A synchronous rotary joint l provided between the outer region of 4 and between 15 and 16 is shown.

FIG. 6 shows a partial sectional view of the synchronous rotary joint 1. In this case, part of the joint is covered with a protective cap 23 as shown. In this embodiment, which is the second principle of the invention,
The outer joint member 6 is coupled to a bell 9 provided at the second shaft end 10 via a longitudinally elastic sleeve member 22. A diamond-shaped opening 24 is provided in the sleeve member 22 to improve longitudinal elasticity.
is the provision. Therefore, the sleeve member is arranged such that angular movement of the outer joint member 6 with respect to the shaft end 10 is avoided, or
Sleeve member 2 that must transmit full rotational torque
2 can be rigidly constructed so as not to be damaged.

FIG. 7 shows a cross-sectional view of the synchronous rotary joint l, which basically corresponds to FIG. In this case, the groove 25 of the outer joint member 6
A support sleeve 36, which engages the bell 9 and is connected to the outer joint member, is provided longitudinally outside the elastic sleeve 22, the other end of said support sleeve tightly fitting the bell 9, but axially Therefore, the outer joint member 6 and the shaft end 10 are supported so as to be prevented from relative rotation.

FIG. 8 shows a synchronous rotary joint 1 having essentially the same structure as FIG. 7. In this case, however, the support sleeve 3
6, the outer end for the sleeve 22 serves as a support means to prevent relative rotation between the outer joint member 6 and the shaft end, and the inner end for the bell 9 forms a stop for the axial length change of the sleeve 22. A sleeve-like projection 13 is provided.

FIG. 9 shows four embodiments of longitudinally elastic sleeves 22. In this case, the opening 24 for improving elasticity is
It is configured as a square fal, a rhombus (as bl, long slits offset from each other), as fcl and as a slit 24 (di) filled with an elastic indentation body 26 (for example, a rubber elastic material).

Fig. 10 shows a synchronous rotary joint 1 having the same structure as Figs. 6 and 8.
showed that. In this case, following the protective camp 23, a bellows 27 is provided which seals the joint. In this embodiment, the rotary torque transmitting bell 9 and the shaft end 10 have ! An axial bore 28 is provided into which the shirt 1-30 is inserted, which is connected to an inner bell 29 located within the sleeve 19.

The bell 29 is positively connected to the outer joint part 6 or to the sleeve-like projection 13 by means of a securing ring 31. In this case, it is fixed to prevent angular movement in the axial direction, but
Slight rotational and radial movements are allowed. ! !
A shaft 30 coupled to 29 is capable of some axial sliding movement within bore 28 . In this case, it passes through the shaft 10,
A pin passing through a transverse bore 33 (in particular an elongated hole) of the shaft 30 with a gap in the axial direction with respect to the shaft 30 serves as an axial stop. In order to reduce friction for the axial sliding of the shaft 30 within the bore 28, two sliding pushers 34,35 are provided. Thus, despite the low resistance to axial sliding,
Significant angular movements between the outer joint member 6 and the shaft end 10 are completely absorbed and eliminated by the structure consisting of the inner bell 29 and the shaft 30. The axial displacement of the shaft ends 5, 10 is limited, on the one hand, by the abutment of the pin 32 against the elongation 33, and on the other hand, by the abutment of the sleeve-like projection 13 and v19 on the end face.

FIG. 11 shows a cervical shaft 101 and a shaft end 1 which are connected to each other via a rotary joint 103 so as to be rotatable and not idling.
02 was shown.

The rotary joint is configured as a sliding joint, so that the cervical shaft 101 can be moved axially relative to the shaft end 102. A boss 10 is fixed to the cervical shaft 101 via a spline 105 and a securing ring 106.

The shaft end 102 is connected to the outer joint part 110 of the synchronous rotary joint via two membranous discs 107, 108 and a sleeve part 109 in a non-swivel but axially flexible manner. The membrane disk 107 is integrally formed on the inner surface of the flange 115, while the membrane disk 108 is connected on the inside to the extended neck shaft 116 of the shaft end 102 by welding.

The rotational torque transmission in a synchronous rotary joint is as usual,
This is done through the ball 111 which is controlled by the pole cage 111 during bending. The membranous discs 107, 108 provided at the shaft end 102 have approximately the same wall thickness and are connected to the shaft 102 and to the sleeve member 109, respectively, in a rotationally secure manner.

The sleeve member 109 integrally transitions into the outer joint member 110. Both membranous discs 107, 108 have approximately the same wall thickness and receive the transmitted rotational torque in approximately the same proportion, while the shaft @ 102 relative to the outer joint member 110
relative deflection when sliding in the axial direction. Synchronous rotating joint 103
is closed in the direction of the shaft end 102 by a sleeve member 109 and a membrane 110, while the internal space of the joint is sealed off from the outside by a metal sleeve 113 and a bellows 114.

FIG. 12 shows a cervical shaft 101 and a shaft end 102 which are connected to each other via a rotary joint 103 so that they do not spin idly and are bendable. In this case, as mentioned above, the boss 104
is fixed to the cervical shaft 101 by a spline 105 and a securing ring 106, while the shaft end 102 is
Two membranous discs 107, 108 and sleeve 10
9 to the outer joint member 110. In this case, the sleeve member 109 consists of a solid ring member 117 and a metal case 118 coaxially assembled with each other. The ring member 117 is attached to the outer joint member 11 with a screw 119.
0, and the metal case 118 is fixed at the shaft end 102.
It integrally transfers to a membranous disk 107b which is supported in the radial direction on the cervical shaft 116 and fixed in the axial direction to the shaft end 102.

However, the case and membranous disk 107b
Not involved in transmitting rotational torque.

On the other hand, the membranous disk 108b is positively engaged with the ring member 117 on its outer circumferential surface, for example by radial fingers for a non-slip connection, and on the inside by splines 121 to prevent it from slipping and to be immovable in the axial direction. an inner sleeve 12 fixed to a cervical shaft 116 such as
Transition to 0. In this case, the end of the inner sleeve 120 serves at the same time to axially fix the membranous disc 108b. The entire rotational torque is transmitted through the membranous disc 108b, while the bending force is received split between both membranous discs, which deflect with respect to the shaft end 102. In this case, an internal member 122 between the membranous discs possibly limits the sliding stroke elastically.

In this embodiment as well, the sealing of the rotary joint in the direction of the shaft end 102 is provided by a sleeve 109 and a membrane disc 108, while the bolted sleeve member 11
3 and bellows 114 serve to seal the other side of the joint.

Below are some convenient embodiments of the invention.

(1) A membranous disk (14) is connected to two abutment elements (
13, 16). The joint according to claim 1, wherein the joint is gripped between 13 and 16).

(2) The membranous disk (14) has a partially circular slit 7) (
20) A joint according to claim 1 or the preceding claim, characterized in that it has an opening in the form of 20).

3. Joint according to claim 1, characterized in that the membranous disk (14) has an opening in the form of a radial slit.

(4) Elastic elements (21
Joint according to one of the preceding clauses, characterized in that ) is provided between the membranous disc (14) and the rigid abutment element (16).

(5) at least one joint half comprises two elements (109, 116) interconnected by two ring-disc-shaped membranous discs, said discs being axially spaced apart from each other; and arranged perpendicularly to the axis of rotation and are connected to the first element (116) in the inner area of the disk and to the second element (109) in the outer area of the disk. The joint described in paragraph 1 (No. 11)
．． Figure 12).

(6) The preceding item, characterized in that both membranous discs (107, 108) are connected to each other on the outside via a bending-rigid sleeve (109), which is integral with the outer joint member (110). Fittings listed.

(7) characterized in that both membranous disks (107, 108) are internally connected to each other via a bending-rigid shaft (116), which is in particular integral with the axial end (102) of the joint; The fitting described in paragraph 5.

(8) One membranous disc (108b) is pivotally mounted against slippage on the inside and outside, while another membranous disc (107b) is mounted only radially and axially on the inside and/or outside; 8. Joint according to claim 5, characterized in that it is a support.

(9) A joint according to one of items 5 to 8, characterized in that the closed surface of the membrane-like disk (107, 108) is provided with a radial slit or a partially circular slit.

(10) The joint according to one of items 5 to 8, characterized in that the membranous disks (107, 108) have metal plate pieces intersecting like spokes that are subjected to tension during transmission of rotational torque.

(11) According to one of the claims 5 to 10, characterized in that between the membranous disks (107, 108) elastic elements are arranged, in particular with a slight axial gap. fittings.

(12) A rigid abutment element (122
11. Coupling according to claim 5, characterized in that the () are arranged at a slight axial spacing.

(13) The sleeve (22), which is elastic in the longitudinal direction, does not idle but can slide freely in the axial direction by the open outer sleeve (36) fixed to the joint neck shaft (10) or the outer joint member (6). 3. The joint according to claim 2, characterized in that it is supported in such a manner.

(14) The sleeve (22), which is elastic in the longitudinal direction, does not idle but can slide freely in the axial direction by the rigid inner sleeve (13) fixed to the joint neck shaft (10) or the outer joint member (6). The joint according to claim 2 or the preceding claim, characterized in that the joint is supported in such a manner that the joint is supported in such a manner that the joint is supported in such a manner that the joint is supported in such a manner as to

(15) Claim characterized in that the longitudinally elastic sleeve (22) consists of webs extending at an angle of about 456 to the sleeve generatrix and defining rhombic openings (24a) between them. The joint described in paragraph 2 or the preceding paragraph.

(16) A longitudinally elastic sleeve (22) is arranged in a plurality of rows of mutually offset circumferential sleeves (24c, 24d)
16. Joint according to one of clauses 13 to 15, characterized in that it has:

(17) The elastic elements (21, 26) are connected to the outer joint member (6)
and the joint cervical shaft (10) or in the longitudinally elastic sleeve (22), in particular an opening or slit (24).
1 of Items 13 to 16, characterized in that it is provided within ).
Fittings listed in.

(18) The supporting means, which are mutually slidable in the axial direction, are connected to the outer joint member (6) on the one hand and to the joint neck shaft (10) on the other hand so that they do not rotate idly. A joint according to scope 1 or 2 or any one of the preceding paragraphs.

(19) They are connected to the outer joint member (6) on the one hand and to the joint neck shaft (10) on the other hand so that they can mutually slide in the axial direction, and are provided with abutment means for restricting axial movement. A joint according to claim 1 or 2 or any one of the preceding claims, characterized in that:

(20) Inner tIl fixed to central shaft (30)
(29) serves at the same time as a support member against bending movements and as a stop against axial sliding, the bell (2
9) is connected to the outer joint member (6) immovably and without idling in the shaft locking direction, and the shaft (30) is slidably in the axial direction, especially with a limited stroke, and is connected to the joint neck shaft. (10) The joint according to claim 1 or 2 or any one of the preceding claims, characterized in that the joint is received in (10).

(21) An outer joint so that the inner bell (29), which is fixed to the central shaft (30) and serves as a support, is fixed in the axial direction and does not idle, but is movable in the radial direction to compensate for impact defects caused by manufacturing. A joint according to claim 1 or 2 or any one of the preceding claims, characterized in that it is inserted into the member (6).

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a synchronous rotary joint according to the present invention, FIG. 2 is a schematic diagram of a first embodiment of a synchronous rotary joint according to the present invention, and FIG.
4 is a schematic diagram of a modified example of the joint in FIG. 2, FIG. 4 is a schematic diagram of a membrane disk, FIG. 5 is a schematic diagram of a modified example of the synchronous rotary joint in FIG. 2, and FIG. 6 is a diagram of the present invention. The second synchronous rotary joint according to
7 is a schematic diagram of a modification of the joint of FIG. 6; FIG. 8 is a diagram of a modification of the joint of FIG. 6; FIG. 9 shows four embodiments of an elastic sleeve. The drawings, FIG. 10, are schematic illustrations of a synchronous rotary joint according to the invention with an axial stop and a bending support member of special construction; FIG. Schematic diagram of a joint, FIG. 12, is a schematic diagram of a rotary joint of the type in which one disc flange of two parallel membranous discs is subjected to rotational torque. 1...Synchronous rotation joint, 2...Inner joint member, 3...
Spline, 4; 31...Securing ring, 5...Insertion shaft, 6...Outer joint member, 7...Spring means, 8...
Supporting means, 9... Bell, 10... Shaft end, 11... Pole, 12... Ball cage, 13... Sleeve-like projection, 14... Membrane-like disk, 15... Outside Sleeve, 16... Disk, 17; 23... Protective cap, 18... Groove, 19, 24... Opening, 20.
...Slit, 21...Ring member, 22...Sleeve member (elastic), 25...Annular groove, 26...
Rubber element, 27... bellows, 28... bore, 29.
...Inner bell, 30...Shaft, 32...Horizontal bottle, 33...Elongated hole, 34 i 35...Bearing bush, 36...Support sleeve, 101...Cervical axis, 10
2... Shaft end, 103... Rotating joint, 104...
Boss, 105.121 ...Spline, 106...
・Securing ring, 107i10B...membrane disk, 1
09...Sleeve member, 110...Outer joint member, 1
11...Ball, 112...Ball cage, 113
;11B...metal case, 114...bellows, 1
15...flange, 116...cervical shaft, 117...
Ring member, 119... Bolt, 120... Inner sleeve 122... Internal member. Figure 1 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1) A ring-shaped joint member (
6) and the joint cervical shaft (10) connected to said member as a longitudinally elastic coupling element (14).
A fitting featuring: 2) A ring-shaped joint member (6) and a joint neck connected to the joint member, particularly in a joint for an automobile drive line, in which mutually bendable joint members are elastically joined in the vertical direction so as not to idle. Joint characterized by a perforated sleeve (22) as a longitudinally elastic coupling element between the shaft (10).