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
  • F16C3/00—Shafts; Axles; Cranks; Eccentrics
  • F16C3/02—Shafts; Axles
  • F16C3/026—Shafts made of fibre reinforced resin
• • 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
  • F16D3/76—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 shaped as an elastic ring centered on the axis, surrounding a portion of one coupling part and surrounded by a sleeve of the other coupling part
• • 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
  • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
  • F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
• • 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
  • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
  • F16C2208/10—Elastomers; Rubbers
  • F16C2208/12—Polyurethan [PU]
• • 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
  • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
  • F16C2208/20—Thermoplastic resins
• • 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
  • F16D2200/00—Materials; Production methods therefor
  • F16D2200/0034—Materials; Production methods therefor non-metallic
  • F16D2200/0056—Elastomers
• • 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
  • F16D2200/00—Materials; Production methods therefor
  • F16D2200/006—Materials; Production methods therefor containing fibres or particles

Definitions

• the invention relates to a shaft device for transmitting a torque.
• the shaft device can be used in a test stand.
• Shaft devices serve to transmit torques and can be used, for example, in test stands to transmit a torque flow between a load or drive device on the one hand and a test object, for example an internal combustion engine or a brake, on the other hand.
• a test object for example an internal combustion engine or a brake
• the invention has for its object to provide a shaft device, which consists at least partially of a fiber-plastic composite and in which an improved damping can be achieved.
• a shaft device with the features of claim 1.
• Advantageous embodiments can be found in the dependent claims.
• Such a shaft device can be advantageously used in particular in a test bench device.
• a shaft means comprises an inner shaft portion of a fiber-plastic composite (FKV), an outer shaft portion of a fiber-plastic composite surrounding the inner shaft portion over an overlap region, and a groove formed between the inner shaft portion and the outer shaft portion in the overlap region on, where at least partially a layer of thermoplastic urethane (TPU) is provided in the joint.
• FKV fiber-plastic composite
• TPU thermoplastic urethane
• the inner shaft section and the outer shaft section thus overlap in the overlapping area over a certain length, so that the gap is formed between them.
• This gap is cylindrical and can be at least partially filled with TPU.
• Thermoplastic urethane belongs to the group of thermoplastic elastomers (also referred to as elastoplasts). These are plastics that behave at room temperature comparable to the classic elastomers, but can be plastically deformed under heat supply and thus show a thermoplastic behavior. TPU is thus a thermoplastic urethane-based elastomer.
• damping properties can be achieved.
• the fiber-plastic composite allows a very low weight of the shaft device.
• TPU in contrast to conventional elastomers on a high shear resistance and is therefore particularly suitable as a damping layer.
• the length of the joint that is, the overlapping area in which a TPU layer is formed, can be reduced.
• the outer shaft section may be formed as a hollow shaft, so that the inner shaft section can be easily accommodated or pushed in at least partially in the hollow area.
• the inner shaft portion may be formed as a hollow shaft, on the one hand to save weight and on the other hand to allow easy production of the inner shaft portion of FKV.
• a fiber-plastic composite for example, a fiber-reinforced plastic or a fiber composite plastic can be understood. It is a material consisting of reinforcing fibers and a plastic matrix. The matrix surrounds the fibers by adhesive or cohesive forces the matrix are bound. By using fiber materials, fiber-plastic composites have a direction-dependent elasticity behavior.
• Suitable fibers are inorganic reinforcing fibers, such as glass fibers, or in particular organic reinforcing fibers, such as aramid fibers, carbon fibers, polyester fibers, etc. FKV materials are known, so that at this point a further explanation is unnecessary.
• CFRP carbon fiber reinforced plastic
• the bonding surfaces between the layer of thermoplastic urethane and the respective associated shaft sections may at least partially identify a layer of an adhesive. It has been found that the joining of the fiber-plastic composite, in particular a CFRP, with the TPU layer proves to be problematic. With the help of the adhesive, it is possible to permanently and reliably connect the TPU layer with the FRP material of the shaft sections. Accordingly, it is expedient if the TPU layer is adhered to the FKV shaft sections at least partially with the aid of the adhesive.
• the inner shaft portion and the outer shaft portion may form a longitudinal compression bandage.
• the excess of the inner shaft section can be only a few thousandths or hundredths of a millimeter.
• the inner shaft section and the outer shaft section are joined together axially and the TPU layer lying between them is pressed in. This already creates a solid bond, consisting of inner shaft section, TPU layer and outer shaft section.
• the two above-mentioned joining principles namely the bonding of the TPU layer on the one hand and the longitudinal compression bandage on the other hand, can also be combined with one another in order to achieve a particular strength.
• a transverse compression bandage is also possible, and this also can be combined with the bonding of the TPU layer.
• multiple pairs of an inner shaft portion and a with this inner shaft portion via a layer of thermal plastic urethane associated outer shaft portion may be provided, wherein the pairings are arranged coaxially with each other and wherein by the pairings a torque to be transmitted from the shaft means is transferable.
• a torque to be transmitted from the shaft means is transferable.
• multiple pairings of an inner shaft portion and an outer shaft portion are provided which forward the torque to be transmitted.
• a TPU layer is provided in the joint between the inner and outer shaft sections.
• some of the shaft sections can each be connected to two other shaft sections which overlap in a corresponding overlapping area.
• an inner shaft portion may be connected to two outer shaft portions, and vice versa.
• two inner shaft sections are provided which are interconnected by a common outer shaft section, wherein a layer of TPU is provided in the joints between each one of the inner shaft sections and the outer shaft section.
• a layer of TPU is provided in the joints between each one of the inner shaft sections and the outer shaft section.
• the shaft connection described can advantageously be used in a test bench device for testing a test object.
• the test rig device can have a load or drive device, such as a dynamometer, an eddy current brake, etc., which can be coupled to a test object at a coupling point.
• the test object may be an engine, a brake or an entire drive train.
• a shaft connection may be provided, which may have a shaft device of the type described above.
• the shaft device may comprise shaft sections made of FKV with TPU layers arranged therebetween.
• Fig. 1 is a sectional view of a shaft device according to a first embodiment
• FIG. 2 is a sectional view of a shaft device according to a second embodiment.
• FIG. 1 shows a section of a section of a shaft device, with an inner shaft section 1 and an outer shaft section 2.
• the inner shaft portion 1 and the outer shaft portion 2 are made of a fiber-plastic composite (FKV).
• FKV fiber-plastic composite
• CFRP carbon fiber-reinforced plastic
• the outer shaft portion 2 is designed as a hollow shaft, so that the likewise designed as a hollow shaft inner shaft portion 1 overlaps over a certain range, the so-called overlap area Ü.
• a gap 3 is formed, in which a layer 4 of a thermoplastic urethane (TPU) is provided.
• TPU thermoplastic urethane
• the TPU layer 4 extends over the entire length of the joint 3, that is, over the entire overlapping area Ü.
• the joint 3 and accordingly also the TPU layer 4 are formed in the example shown in a hollow cylinder.
• FIG. 2 shows another embodiment, wherein the same or similar elements to FIG. 1 are identified by the same reference numerals.
• the shaft device shown in Figure 2 has two inner shaft portions, namely the inner shaft portion 1 in the left half of the image and the inner shaft portion 1 'in the right part of the image. Both inner shaft sections 1, 1 'are coupled to the common outer shaft section 2 via a respective TPU layer 4, 4'. Also in this case, the shaft sections 1, 1 ', 2 made of a FRP material, such as CFRP.
• joints are formed, which in FIG. 2 are identified by the reference symbols 3 (for the joint shown in the left-hand part of the figure) and 3' (FIG. for the joint shown in the right part of the picture) are provided.
• suitable damping properties can be achieved by dimensioning the TPU layer 4 or 4 '.
• the joint length between the inner shaft section 1 and the outer shaft section 2, that is to say the overlapping region U can be made relatively short, as can be seen in particular in FIG.
• the series connection of two TPU layers 4, 4 'shown in FIG. 2 can also be continued further, so that the forces are conducted over a plurality of TPU elements or TPU layers.
• the fact that the respective overlapping area Ü in the TPU layers 4, 4 'can be kept short opens up further scope for design.
• the joining process when manufacturing the shaft device can be simplified because the shaft sections do not have to be joined over a longer overlapping area Ü.
• TPU and CFRP are difficult to match. Therefore, it may be useful if in the connecting surfaces between a respective TPU layer 4 and the respective shaft portion to be connected (inner shaft sections 1, 1 ', outer shaft section 2) an adhesive bond is formed.
• a pressure overlay in addition to the adhesive bond, can be achieved by a longitudinal compression bandage.
• a longitudinal compression bandage it may be expedient if the inner shaft section 1 an oversize opposite to the inner diameter of the outer shaft portion 2, so that the corresponding pressure forces are generated.
• a transverse compression bandage is also possible.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Ocean & Marine Engineering (AREA)
• Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=56940072

Family Applications (1)

Country Status (5)

Families Citing this family (3)

Family Cites Families (12)

• 2015
  • 2015-09-21 DE DE102015115913.9A patent/DE102015115913A1/de active Pending
• 2016
  • 2016-09-19 WO PCT/EP2016/072139 patent/WO2017050684A1/de active Search and Examination
  • 2016-09-19 CN CN201680053824.2A patent/CN108026979B/zh active Active
  • 2016-09-19 EP EP16766577.7A patent/EP3353439A1/de not_active Withdrawn
  • 2016-09-19 KR KR1020187007573A patent/KR101961075B1/ko active IP Right Grant

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