Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
  • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
  • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
  • B66C1/18—Band-type slings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
  • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
  • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
  • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
  • B66C1/125—Chain-type slings
• • 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
  • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
  • F16G15/00—Chain couplings, Shackles; Chain joints; Chain links; Chain bushes
  • F16G15/12—Chain links

Definitions

• the invention relates to a device for transmitting a force, in particular for carrying a load, with two oppositely, identically curved arc segments which are interconnected by two equal length straight legs, wherein the curved arc segments and the straight
• Legs are consistently made of a material at their transition points, with a force input and -aus founded via two bolt-like structural elements, which have an adapted to the associated arc segments outer contour and have to be arranged to transmit the force within the two arc segments. Furthermore, the invention relates to a bolt-like structural element for force input and loan ⁇ tion in a device of the type described above.
• Devices for transmitting a force are known, for example in the form of carrying straps or chain links formed chains. A variety of such devices are used, for example, to carry large loads.
• reference will mainly be made to loops for transmitting a force. This is done only to simplify the description and is not to be considered as limiting. All versions can be transferred to chain links in a corresponding manner.
• Carrying loops usually consist of two semi-circular segments, the so-called loop heads, and intermediate straight areas. If the loop is formed from a composite material, for example resin-impregnated (Kevlar) fibers, then the dimensionally stable loops can be integrally formed without an "interface.” Dimensionally stable means that the loops are loaded without load and independently of their orientation (relative to the surface) Bottom) have the shape described above. follows via bolt-like structural elements, which have an adapted to the semicircular shape of the loop heads outer contour on ⁇ and are arranged within the loop heads, so that the structural elements just do not come into contact with the straight Berei ⁇ chen. Via the structural elements, a radial pressure is introduced into the loop heads.
• the radial pressure exerted by the structural elements is converted into the loops ⁇ heads into tensile forces in the fiber direction.
• the mixed load leads to a strong exaggeration of the material stresses in the region of the transition from the loop head to the straight areas.
• the so-called. Voltage overshoot causes known that the loops fail in the transition areas.
• the transition points therefore limit the maximum load capacity of the loop. This causes only partial utilization of the material strength in the other areas, since especially in loops of Faserverbundma ⁇ material, the fibers should be circumferential and on the other hand determines the weakest point the necessary geometry and thus the not ⁇ maneuvering material use.
• Fig. 1 shows a schematic representation of the structure of a typical known loop, as described above.
• the trained as a loop device 10 for transmitting power comprises two mutually opposite, each semicircular arc segments 11, 12.
• the Bogenseg- elements 11, 12 are connected by two equal length straight legs 13, 14 of length L. With the reference numerals 15, 16, 17, 18, the crossing points are marked.
• the arc segments 11, 12 mechanically connected to the legs 13, 14 in the region of crossing points, for example cohesively with- be interconnected. If the loop is formed from a fiber composite material, then the curved arc segments 11, 12 and the straight legs at the transition points 15,
• transition points 15, 16, 17, 18 throughout of a material, i. resin-impregnated fibers.
• the transition points 15, 16, 17, 18 thus represent only for the adhesion of the arc segments 11, 12 to the straight legs 13, 14 relevant areas of the loops.
• the force input and output takes place via two bolt-like structural elements 19, 20 shown in cross-section.
• the outer contour 21, 22 of the structural elements 19, 20 are also formed semicircular, so that the outer contour 21, 22 completely in contact with the Bogenseg- ments 11, 12 device.
• the outer contour 21, 22 of the structural elements 19, 20 is thus such that they directly adjoin the transition points 15 and 18 or 16 and 17, but do not have any contact with the straight legs 13, 14. This ensures a defined force entry and exit. Only the area of the force input elements that is relevant for the introduction of force is shown. Of course, the bolts may also extend into the region of the straight segments 13 and 14.
• the length L of the legs 13, 14 can be arbitrarily selected ge ⁇ principle.
• the reference symbol R denotes a radius of the arc segments 11, 12.
• the radius of the two arc segments 11, 12 is identical.
• the radii of the arc segments could also be different, in which case the arc segment with the smaller radius determines the carrying capacity.
• the arc ⁇ segments 11, 12 and the legs 13, 14 have on the ge ⁇ entire course of an identical thickness D.
• loops of a fiber composite material of the mixed load from axial tension and radial pressure is countered by the loops according to the need to übertra ⁇ constricting force and the allowable stresses dimensioned in consideration of the places with the highest stresses
• the invention provides a device for transmitting a force, in particular for carrying a load, with two opposite, identically curved arc segments, which are interconnected by two legs of equal length, wherein the curved arc segments and the straight leg at their junctions throughout of a material are produced, with a force input and -austechnisch via two bolt-like structural elements, which have an adapted to the ⁇ ordered curved arc segments outer contour and are to be arranged for transmitting the force within the two arc segments.
• Ver ⁇ course of the curvature at the transition points of the legs to the arc segments and along the respective arc segments is continuous.
• This procedure is based on the recognition that a not inconsiderable part of the stress exaggeration occurs at the transition between the straight leg and the curved one the curvature jumps from a value 1 / R, where R is the radius of the circular arc, in the arc segment to the curvature 0 in the straight leg, through the continuous transition the bend between straight leg and arc segment can be avoided this problem a result, the mixed load of radial pressure and axial tension initially described is redu ⁇ sheet As a result, the same force -.. as compared to a device of the prior art - ringeren overall with a Material cross section to be transferred.
• the course of the curvature at the transition points of the legs is continuous and linear.
• the course of the curvature along the respective sheet segments is continuous and linear.
• the transition of the curvature at the transition points from the legs to the arc segments is formed by a clothoid.
• the curvature ⁇ course of a clothoid can be calculated in a known manner, since clothoids from the road and rail construction are known.
• the device is a loop, in particular of a fiber composite material.
• a loop made of fiber composite material has poor heat transfer properties so that it is particularly suitable for use in applications where hot and cold elements are to be interconnected, while at the same time minimizing heat exchange.
• loops made of a fiber composite material the advantage of a homogeneous material extension, in particular in the region of crossing points, so that a high power transmission and stability of the loop is open ⁇ ensured.
• the device may be a chain link, in particular made of a metal.
• the chain link is preferably made continuously from a material, which can be prepared in ⁇ example, by a punching process or an extrusion process.
• the invention further provides a bolt-like Strukturele ⁇ ment for force input and -aus réelle in a device of the type described above.
• the structural element is characterized ⁇ by that this has an adapted to the associated curved arc segments outer contour in the contact area ⁇ , which at Use in a device of the type described above at least extends to the crossing points.
• customized structural element ensures that the power optimized on the structural elements - without requiring individual Be ⁇ rich or bodies of the device particularly - once in the apparatus for transmitting power and can be.
• the curvature of the outer contour is continuous. If the transition of the curvature at the transition points of the legs is continuous and linear, it is expedient if the curvature of the outer contour (in the region of the transition points) is continuous and linear.
• the curvature of the outer contour may be formed by a clothoid, if the corresponding transition of the curvature at the transition points from the legs to the Bogensegmen- th is also formed by a clothoid.
• a plurality of devices and structural elements of the type described above may be used in particular for the suspension of a superconducting field winding of a hot pole core generator.
• the fastening system according to the invention is also suitable for suspending other objects.
• a smaller space is required by the invention before ⁇ go over the prior art with the same power transmission.
• Fig. 1 is an already described, schematic representation of a trained as a loop device for power transmission according to the prior art
• FIGS. 2A and 2B are schematic representations of the curvature of a loop according to the invention in comparison with a conventional loop according to the prior art.
• Figures 2A and 2B show a schematic representation of the shape of a present invention, a loop out ⁇ forming device 10 for the transmission (Fig. 2A) in comparison with the conventional form of a loop (Fig. 2B).
• the shape of the loop shown in Fig. 2B corresponds ⁇ as in the already described in Fig. 1 loop.
• the loop thickness in Figure 2 is reduced compared to Figure 1 to the line thickness.
• arcuate arc segments 11, 12 are designed semicircular ⁇ .
• FIG. 2A shows the shape of a loop according to the invention.
• the arc segments 11, 12 interconnecting straight legs 13, 14 have the same length L as that of the loop of FIG. 2B.
• the opposing arc segments 11, 12 are formed in the manner of a clothoid and have a continuous and linear transition of the curvature at the transition points of the legs 13, 14 to the arc segments and also in the further course. This means that the curvature in the straight legs which is at the transition points 15, 16, 17, 18 0, is steadily and linearly over into the curvature of the jeweili ⁇ gen arc segments 11, 12th
• any other curve shape is also suitable which allows a continuous transition from the straight legs to the arc segments 11, 12.
• the proposed procedure, thethermsüberhö ⁇ hung at the transition points 15, 16, 17, 18 can be reduced.
• the cross section of the loop according to the invention can thereby be reduced compared with the conventional loop in FIG. 2B.
• the structural elements 19, 20, which take over in the loop, a transmission of force and outtake, to the curvature of the arc segments 11, 12 are fitted Toggle.
• the structural elements 19, 20 of the device 10 according to the invention have an outer contour 21, 22 adapted to the curvature of the arc segments 11, 12.
• the outer contour of the structural elements 19, 20 thus also Klothoiden- shaped.
• the shape of the structural elements 19, 20 is such that the ⁇ se completely against the arc segments 11, 12, but have no contact with the straight legs 13, 14. In other words, this means that the structural elements 19, 20 have the last contact in the region of the transition points 15, 16, 17, 18 to the loop. However, this is not mandatory. The structural elements could also be in contact with the legs 13, 14 as well.
• the length L of a loop according to the invention can be chosen as desired. So it is possible in an extreme Ausges ⁇ taltung that the length L is even 0th
• the loop according to the invention for carrying a load is set to be ⁇ in which the opposite structural elements with a warm and a cold environment in contact, a heat transfer can be reduced by the provision of a particular arm length L.
• the exact measure of the length L can be determined by calculation or in experiments.
• the radius of the opposing arc segments 11, 12 is identical in the described embodiment only by way of example (but also preferred). In practice, the radii of the arc segments may also be different, in which case the arc segment with the smaller radius determines the carrying capacity.
• the embodiment of the loop according to the invention is based on the knowledge that the excess voltage at the transition points 15, 16, 17, 18 coincides with the discontinuity of the
• Curvature transition is correlated.
• the load capacity can not be increased significantly optimizing ⁇ ter loops.
• optimized loops a corresponding reduction of the wall thickness is possible.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Moulding By Coating Moulds (AREA)
• Orthopedics, Nursing, And Contraception (AREA)
• Prostheses (AREA)
• Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=44534439

Family Applications (1)

Country Status (7)

Families Citing this family (2)

Family Cites Families (23)

• 2010
  • 2010-09-09 DE DE102010040495A patent/DE102010040495A1/de not_active Withdrawn
• 2011
  • 2011-09-01 KR KR1020137008938A patent/KR101858281B1/ko active IP Right Grant
  • 2011-09-01 WO PCT/EP2011/065098 patent/WO2012031972A1/de active Application Filing
  • 2011-09-01 JP JP2013527552A patent/JP5744205B2/ja not_active Expired - Fee Related
  • 2011-09-01 EP EP11749852.7A patent/EP2601125A1/de not_active Ceased
  • 2011-09-01 CN CN201180050288.8A patent/CN103167999B/zh not_active Expired - Fee Related
  • 2011-09-01 US US13/821,305 patent/US8844256B2/en not_active Expired - Fee Related

Non-Patent Citations (2)

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