GB2082716A - Improvements in or relating to resilient links - Google Patents
Improvements in or relating to resilient links Download PDFInfo
- Publication number
- GB2082716A GB2082716A GB8122068A GB8122068A GB2082716A GB 2082716 A GB2082716 A GB 2082716A GB 8122068 A GB8122068 A GB 8122068A GB 8122068 A GB8122068 A GB 8122068A GB 2082716 A GB2082716 A GB 2082716A
- Authority
- GB
- United Kingdom
- Prior art keywords
- side portions
- longitudinal axis
- force transmitting
- transmitting member
- disposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 claims description 16
- 239000011159 matrix material Substances 0.000 claims description 13
- 239000013536 elastomeric material Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 description 8
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 6
- 239000000806 elastomer Substances 0.000 description 6
- 239000002657 fibrous material Substances 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/026—Constructions of connecting-rods with constant length made of fibre reinforced resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/32—Rotors
- B64C27/327—Retention means relieving the stress from the arm, e.g. tie-bars
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
- F16D3/60—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising pushing or pulling links attached to both parts
- F16D3/62—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising pushing or pulling links attached to both parts the links or their attachments being elastic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/43—Aeroplanes; Helicopters
Abstract
A force transmitting structural member is provided having the combined features of high tensile strength, torsional flexibility and a widely variable tensile spring-rate. The structural member includes an endless elliptical-shaped section of a plurality of filaments 15, wrapped around and connecting a pair of spaced end fittings 13 to form semi-elliptical shaped side portions 17, 19. Spring means 21 may be disposed between and securely attached to the side portions 17, 19 to give added resilience. <IMAGE>
Description
SPECIFICATION
Improvements in or relating to resilient links
This invention relates to structural force transmitting members in the form of a resilient link. The object of the invention is to provide a structural member having the combined features of high tensile strength, torsional flexibility and a widely variable tensile spring rate.
There is a widespread need in a variety of applications for a structural force transmitting member capable of accommodating high tensile loads and at the same time being flexible in torsion. For example, the structural member used in mounting the rotor blades to the hub assembly of a helicopter rotor system must exhibit sufficient tensile strength to resist centrifugal forces of the rotating blades while permitting the blades to have varying pitch settings requiring some degree of torsional flexibility. Another area of broad application of such structural members is in flexible universal joints and couplings for connecting adjoining shafts, wherein the combined features of high torque carrying capability and angular and axial misalignment accommodation are necessary.
One of the most popular flexible, high strength structural members currently in use for such applications as identified above, is formed of a plurality of parallel fibers wrapped around a pair of spaced bushings. Such force transmitting structural members may be utilized as a tie-bar for connecting the rotor blades to the hub of a helicopter rotor system. In this application high strength wire or fibers such as glass filaments are coated with a matrix material and wrapped in several layers around a pair of spaced bushings to form an open centred structural link consisting of two essentially parallel side portions.Such structural members or links exhibit high tensile strength and high stiffness which are governed by the tensile strength and stiffness of the individual filaments, and also provide relatively low stiffness in torsion since each individual filament is separately coated or impregnated enabling them to move relative to one another.
The basic structure of this type of force transmitting member has also been applied to form the link elements in universal joints and link couplings. In the context of universal joints, couplings, and other joint means for connecting adjoining shafts, it is desired that the connection exhibit adequate torque carrying capability under normal operating conditions while being flexible enough to accommodate angular and axial misalignment between the shafts to be coupled.
The parallel spaced apart side portions between the end bushings, formed of a plurality of filaments coated or impregnated with a matrix material as discussed above, are stressed in tension in response to the application of torque loads, and, if properly designed, will provide sufficient flexibility to accommodate angular and axial misalignment of the adjoining shafts.
In each of the applications of the structural member described above, the individual filaments coated with a matrix material are wrapped parallel to one another in a plurality of successive layers between the end bushings to form spaced apart, parallel side portions. In this configuration (See
Figure 1), as the structural member is placed in tension each of the individual filaments are immediately tensioned and the ultimate strength of the member is dependent on the ultimate strength of the filaments. Such members may be made very stiff in tension depending on the choice of filament as reflected in the load-deflection curve shown in Figure 3. The major problem associated with such structures, however, is that no provision is made to accommodate shock loads which may be imposed on the particular system in which the members are used.Since the force transmitting members as shown in Figure 1 have no inherent tensile spring rate, shock loads must be accommodated solely by the tension carrying capability of the wire or filaments disposed between the end bushings.
Broadly stated, the invention consists in a force transmitting member having a longitudinal axis comprising a pair of end fittings disposed in spaced relation along said longitudinal axis, an endless section of deflectable material, said section being wrapped around and connecting said end fittings to form a pair of non-parallel side portions disposed on opposite sides of said longitudinal axis, said side portions being deflectable toward said longitudinal axis and one another upon application of a tensile load to said end fittings, and spring means disposed between and attaching to said side portions, said spring means resisting said inward deflection of said side portions to provide said force transmitting member with added tensile flexibility.
The invention incorporates the features of high tensile strength and torsional flexibility found in the prior art structural members discussed above, with the added feature of a tensile spring rate to provide a force transmitting member having an inherent resistance to shock loads without a reduction in ultimate strength. In the preferred embodiment of the present invention, the resilient link includes a pair of spaced apart bushings between which a plurality of filaments coated with a matrix material are wrapped in a generally elliptical shape thus forming two semi-elliptical side portions. In contrast to the structural members discussed above, the semi-elliptical side portions of the inventive resilient link will tend to deflect inwardly or "yield" in response to tensile loading.As discussed in detail below, a variety of spring means may be disposed in the interior of the resilient link between the semi-elliptical side portions to achieve a wide range of tensile spring rates.
Whether the resilient link of the present invention is utilized in such applications as a helicopter tie-bar or as the link elements in universal joints or couplings, an inherent spring rate or tensile flexibility will be introduced into the system. In addition, any shock loads imposed on such systems will be absorbed both by the tensile strength of the individual filaments and the spring means disposed between the semi-elliptical side portions. The wide range of tensile spring rates obtainable enhances the versatility of the present invention without sacrificing the ultimate strength of the force transmitting member.
The invention may be performed in various ways and various preferred embodiments thereof will now be described by way of example, with reference to the accompanying drawing, in which: Figure 1 is an isometric view of a prior art force transmitting member;
Figure 2 is an isometric view of the elliptical shaped force transmitting member of the subject invention;
Figure 3 shows load-deflection curves for the force transmitting members of Figures 1 and 2;
Figure 4 is one embodiment of spring means inserted between the side portions of the elliptical-shaped force transmitting member of
Figure 2;
Figure 5 is a second embodiment of the spring means;
Figure 6 is a third embodiment of the spring means;
Figure 7 is a fourth embodiment of the spring means;
Figure 8 is a fifth embodiment as a variation of the embodiment of the spring means shown in
Figure 7;;
Figure 9 is a sixth embodiment of the spring means; and
Figure 10 is a seventh embodiment of the spring means of the subject invention.
Referring now to the drawings and in particular to Figure 2, there is shown a resilient link 11 of the subject invention which includes a pair of spaced bushings 1 3 which are connected by a continuous
length of wire or fibrous material wrapped around the bushings 13 in an elliptical-shaped
configuration to form upper and lower side
portions 1 7 and 19 respectively. Although
elliptical-shaped side portions 1 7 and 1 9 are shown in the Figures, it is contemplated that other
configurations wherein side portions 1 7 and 1 9 are not parallel could be utilized.For purposes of the description herein, a single wrap of the wire or fibrous material between bushings 1 3 will be considered as forming an individual filament 1 5.
The fibrous material or wire may have a variety of geometrical cross-sections including round or rectangular with a high tensile strength. Where fibrous material is utilized, glass fibre or aramid fibre are the most suitable. In forming side portions 17 and 19, the filaments 1 5 are first impregnated or coated with a matrix material and then wrapped side-by-side along the width of each bushing 13 to form a first layer which may be increased to any number of successive layers by continuing the wrapping process until the desired tensile strength of the link 11 is obtained. A removable elliptical-shaped mandrel (not shown) may be inserted between bushings 13 to act as a guide for the filaments 1 5 during winding.Once the winding is completed, the entire coupling 11 is cured while still on the mandrel so that it will retain its elliptical shape.
While the elliptical-shaped link 11 has been described as having side portions 1 7 and 1 9 formed of a plurality of filaments 15, it should be understood that any number of materials could be utilized to form the side portions 1 7 and 19 including metal, laminated straps and the like.
Such materials are considered within the scope Qf the subject invention.
As mentioned above, prior art force transmitting members consisting of a pair of end bushings connected by a plurality of filaments coated with a matrix material include two essentially parallel side portions between the end bushings. In such a configuration, the filaments are instantaneously placed in tension upon the application of tensile loads to the structural member. No protection against shock loading or other external forces is provided in such prior art structures.
Referring now to Figures 48, a number of different embodiments of link 11 are shown in which various configurations of a spring means are disposed between side portions 1 7 and 1 9 for resiliently reacting applied tensile loads including shock loads. The range of tensile spring rates with which link 11 may be provided is virtually unlimited as shown in the load deflection curves of
Figure 3. Curve A is a load deflection curve for the prior art force transmitting device depicted in
Figure 1. In that instance, application of the tensile force to the structural member will immediately place the filaments in tension and since the side portions are disposed essentially parallel to one another, only limited deflection will occur over a wide range of loads.In contrast, curve B depicts the load-deflection characteristics of the opencentred version of the link 11 shown in Figure 2. In that embodiment, side portions 1 7 and 1 9 readily deflect under the application of load from points
B1 to B2 of curve B. However, when side portions 1 7 and 1 9 deflect to a point where they are essentially parallel to one another, link 11 approximates the behaviour of the prior art force transmitting member of Figure 1 (see points B2 to
B3 of Figure 3).
Depending upon the particular application for, which link 11 is intended, the various
configurations of spring means shown in Figures; 4-9 may be utilized to obtain load deflection
characteristics in the range between curve A and
curve B of Figure 3. In Figure 4 for example, the
spring means of link 11 consists of a relatively
rigid body of elastomeric material 21 disposed
between and attaching to the side portions 1 7 and
19. In this embodiment, application of a tensile
load to link 11 would result in some inward
deflection of side portions 1 7 and 19 which would
be limited by the compressive strength of the
elastomer 21. The compressive strength of the
elastomer 21 forming the spring means of
Figure 4 may be further increased with the addition of shims 23 as provided in Figure 5.
Shims 23 may be formed of metal or plastic, and could be completely embedded within the elastomer 21 or extend flush with its outer surface. It is contemplated that the embodiments of link 11 shown in Figures 4 and 5 would be utilized in applications wherein a high tensile spring rate is desired, such as in a tie-bar for connecting the rotor blades to a hub of a helicopter rotor system.
In the alternative, lesser tensile spring rates are achieved in link 11 using the spring means shown in Figures 6-9. In Figure 6, the body of elastomer 21 between side portions 17 and 1 9 is formed with a plurality of openings 27 in any desired arrangement. The openings 27 will of course reduce the compressive strength of the elastomer 21 and thus decrease the tensile spring rate of link 11.
The tensile spring rate of link 11 may be further decreased as shown in Figures 7 and 8 by forming the spring means of one or more generally circular or other open centred configurations. In Figure 8, a single open-centred section 29 is disposed between and attaches to side portions 1 7 and 1 9 to provide limited resistance to the inward deflection thereof upon application of a tensile force to link 11. Another embodiment of the spring means herein may be provided, as shown in
Figure 7, in which a plurality of contiguous opencentred sections 31 are randomly disposed between and attach to one another and side portions 17 and 19.Sections 29 and 31 may be formed of resilient metal, plastic or a variety of other materials, but in the preferred embodiment sections 29 and 31 are formed in essentially the same manner as side portions 17 and 1 9 (without the end bushings), and are easily varied in stiffness and strength depending upon the number of filaments used to form the section and the type of matrix material with which the individual filaments are coated. For example, a relatively stiff filament section may be made by wrapping a large number of individual filaments impregnated or coated with a stiff matrix material such as epoxy in an elliptical, or other open-centred configuration.The compressive strength of sections 29 and 31 may be reduced by simply limiting the number of filaments or by coating the individual filaments with a more flexible matrix material such as natural rubber of urethane.
A variation of the link 11 and spring means of
Figure 8 is shown in Figure 9, in which the side portions 1 7 and 19 are clamped together by a pair of bands 33 positioned on either side of the opencentred section 29 adjacent bushings 13. In this embodiment of the present invention, the side portions 1 7 and 1 9 may be deflected inwardly over a greater distance at the point of connection to section 29 than in the link 11 of Figure 8 since they are clamped together as opposed to being spaced apart adjacent bushings 13. The greater deflection capability of the link of Figure 9 provides enhanced flexibility, and bands 33 could be utilized with the other embodiments of the subject invention to obtain a similar result.
It is contemplated that the links 11 formed with the spring means shown in Figures 6, 7 and 8 will be utilized in application wherein a greater degree of flexibility is required than in the embodiments of
Figures 4 and 5. More particularly, the links 11 of
Figures 6, 7 and 8 could form the link elements of couplings or universal joints wherein a relatively high degree of flexibility is needed to accommodate axial and angular misalignment between the shafts to be joined by the connection.
A still further embodiment of the spring means of the present invention is shown in Figure 10. A reinforced bag 35, pressurized pneurnatically or hydraulically, is disposed between and attaches to side portions 1 7 and 19 of link 11. The spring rate of link 11 is controlled by the pressure level within bag 35 which may be widely varied depending upon the particular requirements of a given application. Whereas the spring rate of the link 11 shown in Figures 4-8 may not be altered once the spring means are in place between side portions 1 7 and 19, the reinforced bag 35 of
Figure 9 provides a means to easily vary the spring rate of link 11 as desired thus enhancing the usefulness of link 11 in applications where a range of spring rates in force transmitting members is required.
In addition, the tensile spring rate of each of the embodiments of the subject invention may be altered by varying the matrix material with which the filaments forming side portions 17 and 19 are coated or impregnated. As mentioned above, coating the filaments with a matrix material such as epoxy or an equivalent will produce a relatively rigid structure after curing. In contrast, the side portions 17 and 19 may be made much more flexible by impregnating the filaments with natural rubber or urethane.
It should be noted that while the spring means utilized in the inventive link 11 herein may be widely varied to obtain a desired tensile spring rate, the ultimate strength of link 11 is the same as that for prior art devices wherein the side portions of the force transmitting member are essentially parallel. In each embodiment of the present invention, the ultimate strength of link 11 is dependent on the tensile strength of the filaments forming side portions 1 7 and 1 9 irrespective of the type of spring means inserted therebetween. However, with the addition of any one of the spring means shown in the figures, the filaments of side portions 17 and 19 will be less likely to fail in tension, as compared to prior art force transmitting members, in the event shock loads or other abnormal external loads are applied to the system. This is because the tensile forces applied to link 11 by shock loads are normally brief in duration, and the spring means tend to prevent side portions 1 7 and 1 9 from assuming a parallel relation with respect to one another where they would be subjected to the full effect of such loads. As discussed above, such added resistance or accommodation of applied tensile loads by the spring means is governed by the compressive strength of the material used to form the spring means. Thus, a wide range of tensile spring rates are obtainable herein from the relatively high spring rate of the solid body of elastomer 21 as shown in Figure 4, to a low spring rate obtained from the single open-centred section 29 disposed between side portions 17 and 19 as shown in
Figure 8.
While the invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention as defined in the appended claims. In addition, many modifications may be made to adapt to a particular situation or material. Therefore the invention is not limited to the particular embodiments disclosed as the best known modes contemplated for carrying out this invention.
Claims (20)
1. A force transmitting member having a
longitudinal axis comprising a pair of end fittings
disposed in spaced relation along said longitudinal
axis, an endless section of deflectable material,
said section being wrapped around and
connecting said end fittings to form a pair of
nonparallel side portions disposed on opposite
sides of said longitudinal axis, said side portions
being deflectable toward said longitudinal axis and
one another upon application of a tensile load to
said end fittings, and spring means disposed
between and attaching to said side portions, said
spring means resisting said inward deflection of
said side portions to provide said force
transmitting member with added tensile flexibility.
2. The force transmitting member of claim 1,
wherein said side portions are formed of a plurality
of filaments each coated or impregnated with a
matrix material said filaments being wrapped
around said end fittings to form said force
transmitting member having high axial strength
and torsional flexibility.
3. The force transmitting member of claim 1,
wherein said side portions are formed of a solid
section of flexible material.
4. The force transmitting member of claim 1,
wherein said spring means is a solid body of
elastomeric material.
5. The force transmitting member of claim 4,
wherein said body of elastomeric material includes
a plurality of shims formed of metal or plastic.
6. The force transmitting member of claim 1,
wherein said spring means is a body of
elastomeric material formed with a plurality of
randomly-spaced openings.
7. The force transmitting member of claim 1,
wherein said spring means includes a plurality of
contiguous open-centred sections attaching to
one another and being randomly disposed
between and attaching to said side portions.
8. The force transmitting member of claim 1,
wherein said spring means is a single open
centred section disposed between and attaching to said side portion.
9. The force transmitting member of claim 1, wherein said spring means is a bag means disposed between and attaching to said side portions, said bag means being inflatable to a selected pressure for providing said force transmitting member with a variable tensile spring rate.
10. The force transmitting member of claim 1 including clamp means for clamping said side portions together adjacent said end fittings, said spring means being disposed between and attaching to said side portion at a point between said clamp means.
11. A force transmitting member having a longitudinal axis comprising a pair of end fittings disposed in spaced relation along said longitudinal axis, an endless section of deflectable material, said section being wrapped around and connecting said end fittings to form a pair of nonparallel side portions disposed on opposite sides of said longitudinal axis, said side portions being deflectable toward said longitudinal axis and one another upon application of a tensile load to said end fittings, and spring means disposed between and attaching to said side portions, said spring means including a solid body of elastomeric material for resisting said inward deflection of said side portions to provide said force transmitting member with a tensile spring rate.
12. A force transmitting member having a longitudinal axis comprising a pair of end fittings disposed in spaced relation along said longitudinal axis, an endless section of deflectable material, said section being wrapped around and connecting said end fittings to form a pair of nonparailel side portions disposed on opposite sides of said longitudinal axis, said side portions being deflectable toward said longitudinal axis and one another upon application of a tensile load to said end fittings, and spring means disposed between and attaching to said side portions, said spring means including a solid body of elastomeric material having a plurality of shims embedded at spaced intervals therewithin for resisting said inward deflection of said side portions to provide said force transmitting member with added tensile flexibility.
13. A force transmitting member having a longitudinal axis comprising a pair of end fittings * disposed in spaced relation along said longitudinal axis, an endless section of deflectable material, said section being wrapped around and connecting said end fittings to form a pair of nonparallel side portions disposed on opposite sides of said longitudinal axis, said side portions being deflectable toward said longitudinal axis and one another upon application of a tensile load to said end fittings, and spring means disposed between and attaching to said side portions, said spring means including a body of elastomeric material formed with a plurality of randomly spaced openings for resisting said inward deflection of said side portions to provide said force transmitting member with added tensile flexibility.
14. A force transmitting member having a longitudinal axis comprising a pair of end fittings disposed in spaced relation along said longitudinal axis, an endless section of deflectable material, said section being wrapped around and connecting said end fittings to form a pair of nonparallel side portions disposed on opposite sides of said longitudinal axis, said side portions being deflectable toward said longitudinal axis and one another upon application of a tensile load to said end fittings, and spring means disposed between and attaching to said side portions, said spring means including a plurality of contiguous open-centred sections attaching to one another for resisting said inward deflection of said side portions to provide said force transmitting member with added tensile flexibility.
1 5. A force transmitting member having a longitudinal axis comprising a pair of end fittings disposed in spaced relation along said longitudinal axis, an endless section of deflectable material, said section being wrapped around and connecting said end fittings to form a pair of nonparallel side portions disposed on opposite sides of said longitudinal axis, said side portions being deflectable toward said longitudinal axis and one another upon application of a tensile load to said end fittings, and spring means disposed between and attaching to said side portions, said spring means including a single open-centred section for resisting said inward deflections of said side portions to provide said force transmitting member with added tensile flexibility.
1 6. The force transmitting member of claim 1 5, wherein said open-centred section is formed of a plurality of parallel filaments each coated with a matrix material.
17. The force' transmitting member of claim 15, wherein said open-centred section is formed of a solid, flexible material.
18. A force transmitting member having a longitudinal axis comprising a pair of end fittings disposed in spaced relation along said longitudinal axis, an endless section of deflectable material, said section being wrapped around and connecting said end fittings to form a pair of nonparallel side portions disposed on opposite sides of said longitudinal axis, said side portions being deflectable toward said longitudinal axis and one another upon application of a tensile load to said end fittings, and spring means disposed between and attaching to said side portions, said spring means including a bag means inflatable to selected levels of pressure for resisting said inward deflection of said side portions to provide said force transmitting member with a variable tensile flexibility.
19. A force transmitting member having a longitudinal axis comprising a pair of end fittings disposed in spaced relation along said longitudinal axis, an endless section of deflectable material, said section being wrapped around and connecting said end fittings, clamp means attaching to said section adjacent each of said end fittings to form a pair of nonparallel side portions disposed on opposite sides of said longitudinal axis, said side portions being deflectable toward said longitudinal axis and one another upon application of a tensile load to said end fittings, and spring means disposed between and attaching to said side portions, said spring means resisting said inward deflection of said side portions to provide said force transmitting member with a tensile spring rate.
20. A force transmitting member substantially in any of the forms described herein with reference to Figure 2 and Figures 4 to 10 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18024680A | 1980-08-22 | 1980-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2082716A true GB2082716A (en) | 1982-03-10 |
Family
ID=22659758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8122068A Withdrawn GB2082716A (en) | 1980-08-22 | 1981-07-17 | Improvements in or relating to resilient links |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5740135A (en) |
| BR (1) | BR8104638A (en) |
| DE (1) | DE3131660A1 (en) |
| FR (1) | FR2488956A1 (en) |
| GB (1) | GB2082716A (en) |
| IT (1) | IT1143414B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2540430A3 (en) * | 1983-02-07 | 1984-08-10 | Sardou Max | Structure, made of composite materials, which is capable of transmitting compressive and tensile forces |
| US4552035A (en) * | 1982-07-01 | 1985-11-12 | Dunlop Limited | Reinforced connecting link means |
| WO1996012898A1 (en) * | 1994-10-24 | 1996-05-02 | SGF SüDDEUTSCHE GELENKSCHEIBENFABRIK GMBH & CO. KG | Process for manufacturing joint disks |
| WO1997008471A1 (en) * | 1995-08-23 | 1997-03-06 | Stromag Ag | Torsionally elastic coupling with various coupling components for multi-stage torque transmission |
| ES2203283A1 (en) * | 2000-07-27 | 2004-04-01 | Carlos Epelde Lizarazu | One-way coupling |
| EP1798428A1 (en) * | 2005-12-13 | 2007-06-20 | EADS Deutschland GmbH | Braided composite part |
| EP1818556A1 (en) * | 2006-02-10 | 2007-08-15 | Wulf Gaertner Autoparts AG | method of making a loop unit |
| WO2013079640A1 (en) * | 2011-12-01 | 2013-06-06 | Sgf Sueddeutsche Gelenkscheibenfabrik Gmbh & Co. Kg | Elastic force transmission element and coupling device |
| WO2014016269A1 (en) * | 2012-07-24 | 2014-01-30 | Sgf Sueddeutsche Gelenkscheibenfabrik Gmbh & Co. Kg | Coupling device for connecting two shaft sections with a radially bridging connecting arrangement |
| CN103615461A (en) * | 2013-11-22 | 2014-03-05 | 中联重科股份有限公司 | Connecting rod, manufacturing method thereof and engineering machine |
| WO2014091514A1 (en) * | 2012-12-13 | 2014-06-19 | Tepco Srl - Tecnologie Dei Polimeri E Dei Compositi | Innovative connecting rod in composite material |
| WO2021081030A1 (en) * | 2019-10-21 | 2021-04-29 | Lord Corporation | Tension torsion strap with arched winding pattern |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3514124A1 (en) * | 1984-09-14 | 1986-03-20 | Thyssen Industrie Ag, 4300 Essen | CARDANIC DOUBLE COUPLING |
| DE3526273C3 (en) * | 1985-07-23 | 1992-12-10 | Flender A F & Co | FLAP CLUTCH |
| US6203434B1 (en) | 1997-05-17 | 2001-03-20 | Daimlerchrysler Ag | Cardan-type joint including supportive compression bars |
| ES2232898T3 (en) | 1997-05-17 | 2005-06-01 | Daimlerchrysler Ag | CARDAN ARTICULATION. |
| DE19744244A1 (en) * | 1997-10-07 | 1999-04-29 | Stromag Ag | Drive shaft flange interface |
| DE102004029989A1 (en) * | 2004-06-21 | 2006-01-12 | Wulf Gaertner Autoparts Ag | Flexible shaft coupling for drive train of motor vehicle, has two flanges that are connected to respective shafts, where elastomer joint body is arranged between two flanges and includes several cylindrical connectors |
| US8827586B2 (en) * | 2012-06-27 | 2014-09-09 | The Boeing Company | Damping mechanical linkage |
-
1981
- 1981-05-27 JP JP56079466A patent/JPS5740135A/en active Pending
- 1981-06-10 FR FR8111433A patent/FR2488956A1/en not_active Withdrawn
- 1981-07-17 GB GB8122068A patent/GB2082716A/en not_active Withdrawn
- 1981-07-20 BR BR8104638A patent/BR8104638A/en unknown
- 1981-08-11 DE DE19813131660 patent/DE3131660A1/en not_active Withdrawn
- 1981-08-20 IT IT49137/81A patent/IT1143414B/en active
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4552035A (en) * | 1982-07-01 | 1985-11-12 | Dunlop Limited | Reinforced connecting link means |
| FR2540430A3 (en) * | 1983-02-07 | 1984-08-10 | Sardou Max | Structure, made of composite materials, which is capable of transmitting compressive and tensile forces |
| WO1996012898A1 (en) * | 1994-10-24 | 1996-05-02 | SGF SüDDEUTSCHE GELENKSCHEIBENFABRIK GMBH & CO. KG | Process for manufacturing joint disks |
| US5766675A (en) * | 1994-10-24 | 1998-06-16 | Sgf Suddeutsche Gelenkscheibenfabrik Gmbh & Co. Kg | Method for manufacturing flexible disks |
| CN1063535C (en) * | 1994-10-24 | 2001-03-21 | 南德盘形接轴节工厂股份有限公司 | Spring joint disk mfg. method |
| WO1997008471A1 (en) * | 1995-08-23 | 1997-03-06 | Stromag Ag | Torsionally elastic coupling with various coupling components for multi-stage torque transmission |
| ES2203283A1 (en) * | 2000-07-27 | 2004-04-01 | Carlos Epelde Lizarazu | One-way coupling |
| US7597953B2 (en) | 2005-12-13 | 2009-10-06 | Eads Deutschland Gmbh | Composite fiber component produced by braiding |
| EP1798428A1 (en) * | 2005-12-13 | 2007-06-20 | EADS Deutschland GmbH | Braided composite part |
| US7691300B2 (en) | 2005-12-13 | 2010-04-06 | Eads Deutschland Gmbh | Composite fiber component produced by braiding |
| EP1818556A1 (en) * | 2006-02-10 | 2007-08-15 | Wulf Gaertner Autoparts AG | method of making a loop unit |
| WO2007090890A1 (en) * | 2006-02-10 | 2007-08-16 | Wulf Gaertner Autoparts Ag | Method for manufacturing a loop unit |
| WO2013079640A1 (en) * | 2011-12-01 | 2013-06-06 | Sgf Sueddeutsche Gelenkscheibenfabrik Gmbh & Co. Kg | Elastic force transmission element and coupling device |
| US9611896B2 (en) | 2011-12-01 | 2017-04-04 | Süddeutsche Gelenkscheibenfabrik GmbH & Co. KG | Elastic force transmission element and coupling device |
| WO2014016269A1 (en) * | 2012-07-24 | 2014-01-30 | Sgf Sueddeutsche Gelenkscheibenfabrik Gmbh & Co. Kg | Coupling device for connecting two shaft sections with a radially bridging connecting arrangement |
| WO2014091514A1 (en) * | 2012-12-13 | 2014-06-19 | Tepco Srl - Tecnologie Dei Polimeri E Dei Compositi | Innovative connecting rod in composite material |
| CN103615461A (en) * | 2013-11-22 | 2014-03-05 | 中联重科股份有限公司 | Connecting rod, manufacturing method thereof and engineering machine |
| WO2021081030A1 (en) * | 2019-10-21 | 2021-04-29 | Lord Corporation | Tension torsion strap with arched winding pattern |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2488956A1 (en) | 1982-02-26 |
| JPS5740135A (en) | 1982-03-05 |
| DE3131660A1 (en) | 1982-06-16 |
| IT1143414B (en) | 1986-10-22 |
| BR8104638A (en) | 1982-04-06 |
| IT8149137A0 (en) | 1981-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |