EP3580072A1 - Drucksicherungs-vorrichtung für druckluft gefüllte räder und herstellungsverfahren - Google Patents
Drucksicherungs-vorrichtung für druckluft gefüllte räder und herstellungsverfahrenInfo
- Publication number
- EP3580072A1 EP3580072A1 EP18703546.4A EP18703546A EP3580072A1 EP 3580072 A1 EP3580072 A1 EP 3580072A1 EP 18703546 A EP18703546 A EP 18703546A EP 3580072 A1 EP3580072 A1 EP 3580072A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tire
- airtight
- chambers
- seam
- pressure
- 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- Withdrawn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
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- 238000000034 method Methods 0.000 title claims 3
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- 230000002950 deficient Effects 0.000 claims description 22
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 4
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 25
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- 238000005096 rolling process Methods 0.000 description 8
- 230000002787 reinforcement Effects 0.000 description 6
- 238000013016 damping Methods 0.000 description 5
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- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
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- 230000001133 acceleration Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/20—Inflatable pneumatic tyres or inner tubes having multiple separate inflatable chambers
- B60C5/22—Inflatable pneumatic tyres or inner tubes having multiple separate inflatable chambers the chambers being annular
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/12—Puncture preventing arrangements
- B60C19/127—Puncture preventing arrangements for inner tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
- B60C23/004—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving the control being done on the wheel, e.g. using a wheel-mounted reservoir
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/02—Inflatable pneumatic tyres or inner tubes having separate inflatable inserts, e.g. with inner tubes; Means for lubricating, venting, preventing relative movement between tyre and inner tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/02—Inflatable pneumatic tyres or inner tubes having separate inflatable inserts, e.g. with inner tubes; Means for lubricating, venting, preventing relative movement between tyre and inner tube
- B60C5/04—Shape or construction of inflatable inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/02—Inflatable pneumatic tyres or inner tubes having separate inflatable inserts, e.g. with inner tubes; Means for lubricating, venting, preventing relative movement between tyre and inner tube
- B60C5/04—Shape or construction of inflatable inserts
- B60C5/08—Shape or construction of inflatable inserts having reinforcing means
Definitions
- the invention relates to a pressure-securing devices for compressed gas filled wheels according to the preamble of claim 1 and to a method for producing the same according to the preamble of claim 14.
- Wheels filled with compressed gas or compressed air are used on land vehicles and aircraft and comprise at least one tire, which is filled with compressed air or pressurized gas, on a rim. There are both tires without and those with hoses. To produce the hoses, sufficient elastic and airtight rubber materials of synthetic or natural rubber, for example, butyl rubber or latex are used. Butyl hoses are slightly less sensitive to heat than natural rubber hoses, but cheaper to manufacture. In order to prevent the hose inner walls and hoses from sticking to the tire or the rim, they may be provided with talcum or other adhesion-reducing agent inside and out.
- An optional spare wheel can not be used in the long term as a replacement for a defective tire.
- Runfiat tires with reinforced flanks were developed, which allow a driver to drive at reduced speed to a service station after a damage event.
- repair sprays have been developed whose sealant can close a small hole.
- Foaming and curing products have the disadvantage that they connect too tightly with the rim and the tire, so that then possibly the tire and the rim must be replaced.
- the whole tire must be replaced, which is associated with a high cost of materials.
- GB 209 944 to reinforce an air hose for wheels, a textile tape is wound spirally around the cross section of the hose. This is very expensive.
- GB 215 662 describes for pneumatic tires a rubber tube in which radially outer portions of the cross-section along the circumference of the tube are covered with cotton strips to reduce the risk of injury to the tube.
- DE 690 04 603 T2 describes a further torus-shaped air hose made of an elastomeric material, which on its outer running surface during the tire comprises a fabric insert serving for reinforcement.
- US 2010/0263777 A1 describes a solution with a rim, three tubes and a tread.
- the hoses include radially inwardly and radially outwardly projecting engagement members which engage corresponding engagement recesses of the rim and the tread.
- the tread and hoses can be made of different materials, with hoses made of thermoplastic elastomers.
- WO 2016/193310 A1 a pressure safety device for wheels is known, in which at least two toroidal tubes are arranged in a tire. If one of the hoses arranged in the tire is injured, the remaining intact tubes should ensure a sufficient residual pressure in the tire for the continuation.
- the hoses are produced or extruded with walls closed in cross-section. It has been shown that in the production of such tubes, the wall thickness in the tolerance range of several tenths of a millimeter varies. When inflating the hoses at the same time, the wall thickness differences cause the hoses to expand differently. Now, if a hose is injured, which has taken up an excessive proportion of the total air volume of all hoses, it may be that the volume of intact remained hoses can not provide the necessary for driving on residual pressure.
- the object of the invention is now to find a simple solution that is compatible with common rims and tires and tire damage in tire damage that leads to the escape of compressed air or compressed gas, ensures a predetermined minimum imprint inside the tire.
- the desired normal pressure in the tire should be able to be rebuilt substantially even after a puncture has occurred.
- the object is achieved by a pressure-securing device having the features of claim 1, or by a method for producing such a pressure-securing device having the features of claim 14.
- the dependent claims describe alternative or advantageous embodiments, which solve further tasks.
- the inventive pressure assurance device for compressed gas filled wheels comprises at least two in a tire to be arranged while running side by side along circumferential lines around the tire axis annular closed hose chambers, which are connected via a respective feed line to a common feed connection, the tire mounted on a rim is.
- the hose chambers are made of a flexible, airtight flat material.
- Each tube chamber is equipped with a transverse seam and at least one longitudinal seam. forms.
- the at least one longitudinal seam is adjacent to the central circumference of this tube chamber extending annularly closed and connecting transversely to the circumferential line abutting contact areas of the airtight sheet airtight to each other.
- the transverse seam extends around the central circumferential line of the tube chamber and connects in the direction of the circumferential line abutting contact regions of the airtight flat material airtight to each other.
- the hose chambers are formed with a transverse seam and at least one longitudinal seam of a flexible, airtight flat material.
- the transverse seam is formed between these ends in such a way that it extends transversely to the circumferential lines of the tube chambers in the tube chambers to be formed and connects airtight to each other in the direction of the circumferential lines abutting contact areas of the airtight flat material.
- a double-layered area is formed along the circumference of the band.
- at least one of the two lateral edge regions of a closed band is folded transversely to its circumferential direction or a second closed band is arranged around a first closed band.
- at least one longitudinal seam is formed such that it is annularly closed in addition to the central circumferential line of the resulting tube chamber and airtightly connects contact regions of the airtight flat material adjacent to each other in the circumferential direction in the longitudinal seam.
- the advantages of the precisely adjustable material properties of a flexible, air-tight flat material in an advantageous embodiment of the hose chambers result overall in a simple solution for a pressure-securing device.
- the hose chambers of the solution according to the invention which are arranged in a tire, can be filled together with compressed gas and, because of the precisely set wall properties, they all expand in the desired manner. If one of the tube chambers filled up to the desired pressure is injured, the volume of the tube chambers remaining intact is sufficient to ensure the residual pressure necessary for further travel.
- At least two tube chambers are formed using a continuous piece of the airtight sheet material and are connected to one another via regions of this flat material.
- Safety requirements is every longitudinal seam and each transverse seam as a tight connection z. B. as seams sewn with at least one thread and / or formed as an adhesive seam and / or as a sealed seam and / or as a fusion seam.
- the seams are elastically deformable in their longitudinal direction and in particular a sealing element is arranged between the interconnected contact regions, which ensures an airtight connection between the contact regions.
- a sealing element is arranged between the interconnected contact regions, which ensures an airtight connection between the contact regions.
- a seam sewn with a thread to be elastically deformable it is designed as a stretched seam.
- the transverse seam is formed to form a closed band between longitudinal ends of blanks of the airtight sheet material.
- the longitudinal ends can be brought into contact with each other in an overlapping or blunt manner, wherein the type of seam and the optionally provided sealing element are selected according to the respective type of contact.
- an overlapping contact it may be possible to dispense with a sealing element, or the sealing element is used as a sealing strip inserted between the overlapping contact surfaces.
- a blunt or front-side contact it is preferable to use a sealing element which is tightly connected to both longitudinal ends.
- two different portions of a sealing strip can each be connected overlapping one end of the airtight Flachmate-.
- At least one longitudinal seam is also formed over the transverse seam in a later processing step, it is advantageous if no or only the smallest possible change in thickness occurs in the transverse seam. It is advantageous if the contact surfaces connected to a longitudinal seam have the same contact material over the entire length of the longitudinal seam and thus also in the transverse seam with which a sealing element can come into permanent and sealing connection.
- the at least one longitudinal seam between see abutting contact areas of the double-layered area is formed.
- the two contact areas are preferably overlapping, so that a dense and resilient seam can be formed with little effort. If two lateral longitudinal edges are joined together, they can be brought into contact with each other in an overlapping or blunt manner. If the two lateral edge regions of a closed band are transposed transversely to their circumferential direction and are brought substantially to mutual contact, then these two edge regions can be applied to a contact region opposite to them and connected thereto with at least one longitudinal seam.
- Hose chambers If in the central areas of these two hose chambers again a longitudinal seam is formed, there are already four hose chambers.
- the flexible, airtight sheet material is at least a two-layer flat material and comprises a layer with textile flat material and a layer with an airtight film.
- the textile sheet can be specifically tailored to the desired stability. For this purpose, for example, in areas of the textile sheet material which extend radially outside the tube chambers along the circumference, thread material with high strength, for example made of Keflar, are used.
- the textile flat material can also be designed by the chosen production method such that its extensibility in the circumferential direction of the tube chambers is smaller than transversely thereto. This ensures that in a tire after a defect-related pressure reduction in a tube chamber the expand other tube chambers transversely to their circumferential lines, but do not escape through a hole in the tire radially outward.
- Textile flat material with a desired extensibility preferably comprises stitches and / or wraps and is, for example, knitwear, in particular
- Knitted fabric optionally knitted fabric, crochet or Bobinet-product trained.
- yarn crossing points of the textile sheet material are fixed, so rubbing relative movements of the threads can be avoided during travel movements, which increases the life of the hose chambers.
- the ductility of the mesh allows for strong local deformation. Tissues are less advantageous because in fabrics, the friction wear is significantly greater than with knitwear and also the local deformability is limited.
- the embodiment comprises an air-tight film
- this is preferably designed as an elastically deformable plastic film, preferably with polyurethane, in particular with a thermoplastic polyurethane elastomer.
- the film material it must be ensured that it remains sufficiently stable at the maximum temperatures that occur in tires.
- it is at least as elastic as the textile material when combined with a textile material.
- the ply of textile flat material is connected to the ply of the airtight film via an adhesive bond.
- Different expansion properties in the circumferential direction and transversely thereto as well as specific strength properties can also be ensured with a flat material in the form of a film with a corresponding fiber insert. If the foils are sufficiently stable, it may be possible to dispense with a layer of textile material. If the textile material is hermetically sealed with a coating, it may be possible to dispense with a film.
- the structure of the flexible airtight flat material can be adapted to the particular needs, which are different for wheels of light road vehicles than for example for aircraft wheels or wheels of heavy off-road vehicles.
- each tube chamber is elastically deformable at least in the direction about its central circumferential line, in particular at least to 1.5 times the unstressed resting length.
- this flat material is also in the Direction of the central circumferential line elastically deformable, wherein preferably the elastic extensibility around the central circumferential line is greater than along the central circumferential line.
- a chamber opening is formed, to which the feed line is airtight connectable.
- an eyelet is inserted into the chamber opening, which has an alignment feature, in particular with respect to the direction of the circumferential lines, so that a connection part can be inserted into the eyelet in a desired orientation.
- an oval design of the eyelet and the adapted thereto portion of the connecting part can be used.
- the solution according to the invention can be used on standard rims and in standard tires, wherein a common feed connection is arranged on the opening for the opening of a valve formed on the rim.
- the at least two circularly closed tube chambers used in a tire can all be connected to one another via the airtight flat material.
- two or more not firmly interconnected sets are compiled with at least one tube chamber.
- Such sets can be releasably connected via a connecting device to a stack of hose chambers.
- the replacement of a set with a defective tube chamber is made possible by means of connectable and detachable connections to the feed lines between the tube chambers and the common feed connection.
- the undamaged sets with hose chambers and the tire can still be used.
- the bead reinforcement and / or the core profile formed for the driving stability and the steering behavior on the tire can also be reduced, because an adjoining tube chamber can at least partially take over its function.
- the hose chambers are optionally equipped according to their position in the tire with increased wall thickness and / or with additional elements.
- the pressure-securing device comprises a tire and the circumferential lengths of the tube chambers are adapted to these tires such that, after placing in the tire and inflating to a first degree of filling, with their smallest circumferential lines facing the tire axis Radius around the tire axis, which is greater by a predetermined amount than the inner radius of the tire edge lines with the smallest circumference of the tire.
- the free space provided in the tire with the hose chambers at the smallest circumference of the tire enables trouble-free mounting on the rim.
- the tube chambers are connected via the feed lines to the common feed connection, which is preferably arranged at a passage opening of the rim. Subsequently, the tube chambers are inflated via the common feed connection to a first degree of filling, so that the hose chambers are held in the tire and provide the desired clearance. In this state, the mounting of the tire on the rim without problems is feasible because the space for the radially outwardly projecting rim is sufficiently large.
- the hose chambers can be filled with compressed gas until the desired tire pressure is built up in the tire.
- the air between the tube chambers and the rim can not escape. Therefore, it is advantageous if at least the passage opening through the rim or the common feed connection used still provides a vent connection from the interior between the rim and the tire to the environment. It goes without saying that additional vents can be formed by the rim, so that the tube chambers are inflated so that substantially no residual air between the tube chambers and the rim or the tire remains.
- At least parts of the outer surfaces of the tube chambers comprise an insert or a coating.
- Tubing chamber walls of adjacent tube chambers substantially radially from the rim to the side facing away from the tire tread inside of the tire. Due to the pressure in the tube chambers and possibly also due to the longitudinal seams, the radially extending tube chamber walls are stiffened and could be heavily mechanically stressed by the compression and decompression occurring periodically during rolling of the wheels.
- annular damping elements are arranged between the adjoining tube chamber walls, preferably in the vicinity of the inner surface of the tire.
- both tube chamber walls deviate somewhat from the radial orientation.
- the radially aligned sections press in compression phases on the damping element, which can absorb the compression.
- the damping element formed elastically, optionally made of sponge rubber or of a sufficiently elastic or damping plastic.
- the double-layered region formed from at least one closed band in the production of the tube chambers comprises adhesive material after the formation of the at least one longitudinal seam on the radially outwardly directed surface.
- This material can be applied after the formation of the at least one circumferential longitudinal seam.
- flat material is already used in the compilation of the double-layered area, which is provided with adhesive material at least in some areas. If a second closed band is arranged around a first closed band, flat material can be used for the second closed band, which is provided with an adhesive coating on the outwardly directed surface in the band form.
- the provided with adhesive material faces of the outer surfaces of the
- Hose chambers are arranged so that adjoining outer surfaces of hose chambers adhere to each other in the above described for rolling rolling process, or do not move relative to each other.
- the tube chambers also adhere to the inner surface of the tire, so that no frictional movements occur between the tire and the tube chambers.
- the adhesion between the hose chambers and optionally between the hose chambers and the tire is also designed so that the hose chambers can be solved by the tire and that in a defective tube chamber, the subsequent tube chambers can expand so against the defective tube chamber that not damaged tube chambers fill the tire interior, while ensuring the minimum total pressure required, so that the tire ensures the minimum necessary running properties.
- the adhesive material is therefore chosen so that the adhesion forces per area are in a range between a minimum necessary and a maximum allowable surface adhesion force. The surface adhesion forces achieve a mechanical cohesion of the surfaces or elements involved.
- the surface adhesion force should also remain for a predetermined temperature range between the minimum necessary and the maximum permissible surface adhesion force.
- the flexible, air-tight flat material is preferably selected so that the internal friction arising during the rolling and its excitation frequency is minimal. Then the temperature of the tube chambers is also within a narrower temperature range.
- the mechanical cohesion between the tire and the hose chambers achieved by the adhesion forces ensures that when accelerating and braking the wheels with the tires and the hose chambers, the forces and torques other than the tires and the hose chambers do not cause relative circumferential rotation of these elements to lead .
- adhesive forces are also provided between the rim and the areas of the hose chambers adjacent thereto.
- the hose chambers can be provided with adhesive material even in partial areas which face the rim.
- the common feed connection is arranged on a passage opening of the rim.
- the common feed connection comprises a feed opening and on the side facing away radially from the wheel axle for each feed line a closure region, these closure regions preferably biased all connections from the feed opening into the feed lines individually shut. This ensures that in the case of a leaking tube chamber, the other tube chambers do not discharge pressurized gas through the defective tube chamber to the environment via their feed lines.
- the common feed connection its feed opening is provided, analogously to a standard valve, with a check valve which can be opened by means of the insertion of a central pin.
- a check valve which can be opened by means of the insertion of a central pin.
- the distances of the closure regions increase or decrease along the essentially radially extending longitudinal axis of the feed connection.
- the lines of intersection of the closure regions with normal planes to the longitudinal axis can be formed straight or curved.
- the closure regions are formed by partial surfaces of a displaceable valve body, wherein the valve body is arranged in a housing of corresponding design with openings to the feed lines.
- the closing bias between the housing and valve body is preferably achieved by at least one spring element.
- the openings and the adjoining supply lines are tightly connected via detachable connections.
- annular grooves are formed at the openings, and the end portions of the feeders include respective annular beads for engaging with the annular grooves. Because the internal cross-sectional area of the feeder lines can be made small, the forces to be absorbed by engaging links are small.
- the wall thickness or dimensional stability of the feed lines is preferably formed so high that they remain open when they are loaded from the outside with common tire pressures. This load capacity is required for emptying the hose chambers, because yes, the feed lines inside the tire of the
- Hose chambers run to the common feed connection and thus are loaded on the outside with the tire pressure.
- Hose chambers leads, the supplied compressed gas can not escape through the defective hose chambers into the environment, in a further preferred embodiment, a differential pressure locking device is used for each hose chambers. This makes the connection through the common feed connection to the defective hose chambers by means of the pressure of at least one intact hose chamber closable.
- the differential pressure closing device comprises a closure device for each connection of a hose to its feed line, which closes the connection from the feed opening into the defective hose chamber at a defective hose chamber due to an overpressure in at least one intact hose chamber.
- the closure devices are preferably arranged on chamber openings of the hose chambers and in particular each formed with a tightly arranged on the chamber opening connecting part.
- a preferred connection part comprises a connection from the supply line to a free end open loop in the tube chamber and is aligned in the chamber opening such that the radius of curvature of the line loop is high due to overpressure in at least one intact tube chamber in the event of a defective and therefore flattened tube chamber is squeezed.
- the connection from the supply line into the tube chamber is interrupted and when refilling compressed gas through the common feed connection, the supplied compressed gas can not escape through the tube chamber with the leak, but fills the at least one other tube chamber.
- the wheels of a vehicle are equipped with pressure-securing devices according to the invention, it is sufficient to carry at least one compressed-gas cylinder after a pressure drop in a tire in the majority of cases in order to ensure a substantially unrestricted movement.
- a compressed gas bottle allows a quick and easy refilling of the undamaged
- Hose chambers without special expertise. When refilling quickly, the refilling person is only a short time outside the vehicle busy, so that the risk of harassment or a weather-related burden is very small. It can be dispensed with the entrainment of a spare wheel and tools for replacing a wheel.
- the space requirement for the small compressed gas cylinder is much smaller than the space required for a spare wheel and tools.
- pressurized gas in the form of nitrogen is preferably used.
- a pressure cylinder with nitrogen is not associated with an increased risk of fire or explosion even in the event of accidental damage. The pressure drop in a tire with the pressure relief device is limited and yet easy to determine.
- the described simple possibility of detecting a pressure drop over values of the ABS system or of the indirect tire pressure monitoring system is an advantage of the pressure-securing device compared with the use of "run-flat" tires, in which the outer diameter of the tire also decreases due to the pressure drop relatively rigid side surfaces does not decrease enough, so that for the detection of a tire defect pressure measurements are necessary.
- Run flat tires gen also significantly higher amounts of material and a complicated structure and can only ensure a limited ability to continue.
- FIG. 1 is a perspective view of a cut-open pressure relief
- FIG. 2 is a view of the pressure securing device shown in FIG. 1; FIG.
- FIG. 3 shows a perspective view of a closed band formed from an airtight flat material, which is shown cut open at a corner, FIG.
- FIG. 4 is a side view of the closed band according to FIG. 3,
- FIG. 5 is a plan view of the closed belt according to FIG. 3,
- FIG. 6 is a perspective view of a formed from an airtight sheet closed tape with reinforced areas
- FIG. 7 is a perspective and cutaway view of a formed from a closed band double-layered area
- FIG. 8 is a view of the double-layered portion shown in FIG. 7.
- FIG. 8 is a view of the double-layered portion shown in FIG. 7.
- FIG. 9 is a perspective and cutaway view of a pressure relief device with four hose chambers
- FIG. 10 is a view of the four hose chambers shown in FIG. 9,
- 1 1 is a perspective view of a cut-pressure-securing device with four only partially inflated tube chambers, and a tire and a rim,
- FIG. 12 is a view of the pressure securing device shown in Fig. 1 1,
- 13a and 13b are longitudinal sections through a feed connection in the closed or open valve position
- FIG. 13c shows an end view of the feed connection according to FIG. 13a and 13b.
- Fig. 14 is a perspective view of a differential pressure locking device.
- FIG. 1 and 2 and 1 and 12 show a wheel with a pressure-securing device 1 with four hose chambers 2.
- the hose chambers 2 are in the cavity formed by a rim 3 and a tire 4.
- the Hose chambers 2 extend adjacent to each other along circumferential lines around the tire axis and are thereby closed in an annular manner.
- Each tube chamber 2 is connected via a respective feed line 5 (FIGS. 11, 12) to a common feed connection 6.
- the tire 4 can be mounted together with the hose chambers 2 on the rim 2.
- Fig. 1 and 2 show the hose chambers 2 in the state filled with compressed gas, in which the desired tire pressure in the space between the rim 3 and the tire 4 is constructed. In Fig.
- the hose chambers 2 are only slightly filled with compressed gas.
- the hose chambers 2 are formed from a flexible, airtight flat material.
- Each tube chamber 2 is formed with a transverse seam 7 and at least one longitudinal seam 8.
- the at least one longitudinal seam 8 is closed annularly next to the central circumferential line of the respective tube chamber 2 and connects airtight to each other abutting contact areas of the airtight sheet material transversely to the circumferential line.
- the transverse seam 7 extends around the central circumferential line of the tube chamber 2 and connects in the direction of the circumferential line abutting contact regions of the airtight sheet material airtight to each other.
- all tube chambers 2 are connected to each other via a continuous piece of the airtight sheet material. If one of the tube chambers 2 is defective, a minimum necessary tire pressure can be maintained from the remaining three sealed tube chambers. So that at a later leakage of another tube chamber still enough tight tube chambers 2 are available, the contiguous
- Hose chambers 2 replaced on occasion.
- hose chambers 2 each to be connected to each other as a set via the airtight flat material.
- the two sets were then releasably connected via a connecting device to a stack of hose chambers.
- the replacement of a set with a defective tube chamber would be made possible by means of connectable and detachable connections to the feed lines 5 between the tube chambers 2 and the common feed connection 6.
- Undamaged sets and the tire can still be used.
- 3 to 10 illustrate the method of manufacturing a pressure-securing device 1 having four hose chambers 2. First, at least one piece of airtight sheet 9 is cut to a length associated with the length of a central central circumferential line of the hose chambers 2.
- each piece of airtight flat material 9 are brought into contact with each other to form a closed band 11. Between these ends 10, the transverse seam 7 is formed such that it extends transversely to the circumferential lines of the hose chambers 2 in the hose chambers 2 to be formed and connects airtight to each other in the direction of the circumferential lines abutting contact areas of the airtight Flachma- terials.
- the longitudinal ends 10 may, as shown in FIGS. 3 to 6, be brought into contact with one another overlapping each other with contact surfaces extending from the ends 10.
- the type of transverse seam 7 and an optionally provided sealing element are selected according to the respective type of contact and depending on the material in the contact surfaces.
- the end faces of both longitudinal ends 10 are directly adjacent to each other, there is also the embodiment in which the one longitudinal end 10 extends beyond the other, so that there is a gap between the two end faces.
- sealing strip 12 is used for the transverse seam 7, then it is expedient to also use sealing strips 8 for the longitudinal seams.
- the arrangement of sealing strips 12 is particularly simple on a flat, airtight flat material, so that it is advantageous if all the sealing strips 12 required for the transverse seam and the longitudinal seams are already arranged on the airtight flat material with adhesive bonds before the formation of a closed strip 11 they remain in the formation of a closed band 1 1 at the desired location and for the
- the dense transverse seams 7 shown in FIGS. 3 to 6 comprise, for example, a sealing strip 12 and a seam sewn with at least one thread.
- the contact surfaces of the airtight sheet over the sealing strip 12 by means of an adhesive seam and / or a sealed seam and / or a fusion seam airtight connected to each other.
- the airtight flat material comprises a first layer 9a of an airtight film and a second layer 9b of textile flat material. The stitched with at least one thread seam and the textile sheet material ensure a robust mechanical connection.
- the first layer 9a or the airtight film is connected via an adhesive bond with the second layer 9b or with the textile flat material.
- the textile sheet 9b is formed so that desired deformation properties of the hose chambers 2 can be achieved.
- the textile flat material 9b comprises stitches and / or wraps and is thus designed as knitwear, preferably knitwear, optionally knitwear, crocheted or Bobinet ware.
- the airtight film 9a is an elastically deformable plastic film, preferably with polyurethane, in particular with a thermoplastic polyurethane elastomer.
- the textile flat material can ensure the respective desired deformation and load properties in predetermined regions of the hose chambers 2.
- the textile flat material 9b may also comprise reinforced regions 9c which, after the formation of the tube chambers 2, extend along their outer circumferential regions.
- the reinforced regions 9c can be formed with particularly strong threads, or loadable threads can additionally be introduced into the textile flat material.
- the air-tight film 9a is preferably somewhat more deformable and ensures the necessary tightness in every possible deformation of a hose chamber 2.
- the airtight sheet material of each tube chamber 2 is elastically deformable at least in the direction of its central circumferential line, in particular at least to 1 .5 times the unstressed resting length.
- it is also elastically deformable in the direction of its central circumferential line, wherein preferably the elasticity around the central circumferential line is greater than along the central circumferential line.
- the illustrated closed bands 1 1 have at the cross seam 7 a region of the course of the closed band 1 1 is away.
- a transverse seam 7 is formed in a butt joint of the airtight sheet.
- the small-area end faces form the contact surfaces, so that preferably a sealing element is used for a reliable connection, which is tightly connected to both longitudinal ends.
- two portions of a weather strip are each overlapped with one end of the airtight sheet.
- a double-layered area along the circumference of the band is formed.
- longitudinal seams 8 must be formed to form the hose chambers. If the airtight sheet material on the two surfaces of different material, such as textile sheet or a film, the closed band must be left in the form or everted, that the inwardly facing surface necessary for forming the airtight longitudinal seams material and possibly already comprises sealing strips 12 adhering to the airtight flat material.
- the airtight film 9a and the sealing strips 12 are arranged on the band inside when forming the transverse seam 7. They are then turned over so that the dense film lies on the outer side of the tape.
- both lateral edge regions of a closed band 1 1 are folded transversely to its circumferential direction and brought together so that both lateral edge lines 1 1 a meet one another.
- three sealing strips 12 are arranged, in which the sealing strips shown in FIG. 9 and 10 shown longitudinal seams 8 are formed.
- the three longitudinal seams 8 are formed so that they are closed annularly extending in the resulting tube chambers 2 next to the central circumferential line and connect airtight to each other at the longitudinal seams 8 adjacent contact areas of the airtight sheet material airtight.
- the middle longitudinal seam 8 is the double-layered area together with the two lateral Border lines 1 1 a connected.
- a connection is always formed between mutually associated circumferential regions of both layers of the double-layered region. If the folding over of the two lateral edge regions of a closed band 1 1 is too time-consuming, the four tube chambers 2 can also be achieved by arranging a second closed band 11 around a first closed band and five longitudinal seams 8 instead of the three longitudinal seams 8 become.
- two pieces of the airtight sheet to be arranged on top of each other and formed together into one band, the longitudinal ends of both pieces being connected in pairs separately from each other. Desired sealing strips are placed on one of the pieces prior to assembling the two pieces.
- the hose chambers 2 shown in FIGS. 9 and 10 each comprise a chamber opening 1 3, to which a feed line 5 can be connected in an air-tight manner.
- a feed line 5 can be connected in an air-tight manner.
- one eyelet is used in each chamber opening 1 3, which in particular with respect to the direction of the circumferential lines has an alignment feature, so that a on-trailer in a desired orientation can be inserted into the eyelet.
- the chamber openings 13 and correspondingly the eyelets are oval, so that a connection part 14 according to FIG. 14 is arranged with a corresponding oval seal seat 14a after pressing the seal seat 14a in an eyelet in the desired alignment position on the hose chamber 2.
- a differential pressure closing device which makes the connection through the common feed connection 6 to a defective tube chamber 2 closable. It comprises a closure device arranged at the chamber opening 1 3 of a hose chamber 2 with a connection part 14 tightly arranged at the chamber opening 1 3.
- connection part 14 comprises a connection from a connection 14b for the feed line 5 to the connected end 15a of an arranged in the hose chamber 2,
- the line loop 15 is aligned such that the radius of curvature of the line loop 1 5 in the case of a defective and therefore flattened tube chamber 2 due to a nes overpressure is squeezed in at least one intact Schiauchhunt 2, so that the connection from the port 14b in the tube chamber 2 is interrupted and when refilling compressed gas through the common feed connection 6, the supplied compressed gas can not escape through the tube chamber 2 with the leak but at least one other tube chamber 2 fills (Fig. 1 1).
- 13a, 13b and 13c show an embodiment of the common feed connection 6, which comprises a feed opening 16 and openings 17 to the feed lines 5, not shown, and connections which can be closed therebetween.
- connections which can be closed therebetween.
- FIG. 1 3a are formed on a central conical portion of a valve member 1 8a formed closure portions 1 8 of the spring 1 9 against the adapted receiving portion 20a of the housing 20, so that all connections from the feed opening 1 6 to the openings 1 7 are closed.
- feed lines 5 can be tightly connected via detachable connections.
- the feed opening 1 6 of the common feed connection 6 is connected to all openings 1 7 due to the inserted central pin 21, the central conical section of the valve part 1 8a displaced therewith and the closure areas 1 8 thus brought into the open position.
- Compressed gas can be added via the feed port 6 and feed lines, not shown, in hoses not shown or drained from these.
- the housing 20 comprises two housing parts 20b and 20c which can be screwed together and a sealing element 20d arranged therebetween, wherein the first housing part 20b has the openings 17 and accommodates the spring 19 and the second housing part 20c via a thread with the inner connection opening at a passage opening the rim 3 fixable valve portion 21 is connected.
- the valve section 21 comprises a main part 22 and a sleeve 23 which can be screwed tightly thereon. Elastic connecting rings 24 of the main part 22 and the sleeve 23 allow the valve section 21 to be clamped to the passage opening of the rim 3.
- closure regions 18 are arranged at a conical region with a circular cross section, this region too a valve member 1 8a belongs, which is slidably mounted in the housing 20 correspondingly formed and connected to the central pin 21.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH00148/17A CH713445A2 (de) | 2017-02-09 | 2017-02-09 | Drucksicherungs-Vorrichtung für Druckgas gefüllte Räder und Herstellungsverfahren. |
| PCT/EP2018/052427 WO2018145976A1 (de) | 2017-02-09 | 2018-01-31 | Drucksicherungs-vorrichtung für druckluft gefüllte räder und herstellungsverfahren |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3580072A1 true EP3580072A1 (de) | 2019-12-18 |
Family
ID=61168083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18703546.4A Withdrawn EP3580072A1 (de) | 2017-02-09 | 2018-01-31 | Drucksicherungs-vorrichtung für druckluft gefüllte räder und herstellungsverfahren |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3580072A1 (de) |
| CH (1) | CH713445A2 (de) |
| WO (1) | WO2018145976A1 (de) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US646141A (en) * | 1899-07-28 | 1900-03-27 | William Corliss | Pneumatic wheel-tire. |
| FR401029A (fr) * | 1908-07-04 | 1909-08-17 | Henri Cain | Dispositif pour le gonflement des bandages pneumatiques à chambres multiples |
| US1396697A (en) * | 1913-07-09 | 1921-11-08 | Breuer Eduard | Pneumatic tire |
| GB209944A (en) | 1923-01-16 | 1924-01-24 | Edward Brice Killen | Improvements in or relating to inner air tubes for inflated tyres |
| GB215662A (en) | 1923-10-27 | 1924-05-15 | George Frederick Mohlman | Improvements in or relating to inner tubes for pneumatic tyres |
| FR2129941B1 (de) * | 1971-03-23 | 1973-05-11 | Joret Jean Pierre | |
| DE3032646A1 (de) * | 1980-08-29 | 1982-05-06 | Metzeler Kautschuk GmbH, 8000 München | Anordnung aus einem luftschlauch un einem luftreifen |
| FR2642371B1 (fr) | 1989-01-27 | 1991-12-27 | Hutchinson | Chambre a air, notamment pour vehicule du type bicyclette ou cyclomoteur et son procede de fabrication |
| DE19964211A1 (de) * | 1999-11-11 | 2002-04-25 | Heinz Klinger | Klinger-Mehrsicherheitsreifen MSR-3000 |
| EP2226203A4 (de) | 2007-12-27 | 2013-01-30 | Bridgestone Corp | Reifen und felgenanordnung |
| CH711160A1 (de) | 2015-06-03 | 2016-12-15 | Generation Concept Stiftung | Drucksicherungs-Vorrichtung für Druckluft-gefüllte Räder und Verfahren dazu. |
-
2017
- 2017-02-09 CH CH00148/17A patent/CH713445A2/de not_active Application Discontinuation
-
2018
- 2018-01-31 EP EP18703546.4A patent/EP3580072A1/de not_active Withdrawn
- 2018-01-31 WO PCT/EP2018/052427 patent/WO2018145976A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CH713445A2 (de) | 2018-08-15 |
| WO2018145976A1 (de) | 2018-08-16 |
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