WO2019014580A1 - Système de gestion de pression de pneu - Google Patents

Système de gestion de pression de pneu Download PDF

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Publication number
WO2019014580A1
WO2019014580A1 PCT/US2018/042068 US2018042068W WO2019014580A1 WO 2019014580 A1 WO2019014580 A1 WO 2019014580A1 US 2018042068 W US2018042068 W US 2018042068W WO 2019014580 A1 WO2019014580 A1 WO 2019014580A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
bearing
rotary union
management system
tire pressure
Prior art date
Application number
PCT/US2018/042068
Other languages
English (en)
Inventor
Sascha Castriotta
Original Assignee
Airgo Ip Llc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US15/649,004 external-priority patent/US20180304699A1/en
Application filed by Airgo Ip Llc filed Critical Airgo Ip Llc
Priority to AU2018301852A priority Critical patent/AU2018301852B2/en
Priority to EP18831102.1A priority patent/EP3652000A4/fr
Priority to BR112020000752-8A priority patent/BR112020000752A2/pt
Publication of WO2019014580A1 publication Critical patent/WO2019014580A1/fr

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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
    • 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
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00345—Details of the rotational joints
    • B60C23/00347—Details of the rotational joints comprising two or more feedthrough
    • 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
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00309—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by the location of the components, e.g. valves, sealings, conduits or sensors
    • B60C23/00318—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by the location of the components, e.g. valves, sealings, conduits or sensors on the wheels or the hubs
    • 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
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00309—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by the location of the components, e.g. valves, sealings, conduits or sensors
    • B60C23/00336—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by the location of the components, e.g. valves, sealings, conduits or sensors on the axles
    • 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
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00345—Details of the rotational joints
    • 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
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00354—Details of valves
    • 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
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00363—Details of sealings
    • 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
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00372—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by fluid diagrams
    • 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
    • B60C2200/00—Tyres specially adapted for particular applications
    • B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/55—Systems consisting of a plurality of bearings with rolling friction with intermediate floating or independently-driven rings rotating at reduced speed or with other differential ball or roller bearings
    • 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
    • F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
    • 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
    • F16C2310/00—Agricultural machines
    • 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
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • 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
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • F16C25/08—Ball or roller bearings self-adjusting
    • F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring

Definitions

  • the present invention relates to the field of tire pressure maintenance. More particularly, the present invention relates to the management of tire pressure of tires supporting tractor trailers, even while the trailers are traveling along a roadway.
  • the present invention relates to an improved rotary union for use in a central tire pressure management system for automatically maintaining the inflation pressure of the pneumatic tires on moving vehicles such as tractor trailers.
  • tractor trailers utilize the air compressor on the tractor as a source of pressurized air to activate braking systems.
  • the compressor directs air to the reserve air brake tank on the trailer, which generally corresponds to the range of typical inflation pressures in the tires used on trailers.
  • Air from the reserve air brake tank is first directed to the braking system to maintain the air pressure in the braking system.
  • excess air is directed from the tank through a pressure protection valve to a control box for the tire inflation system.
  • the pressure protection valve only opens to direct the air to the control box when excess air pressure is present, thereby preventing air from being directed to the tire inflation system which is needed for the trailer braking system.
  • the control box contains a pressure regulator which is set to the cold tire pressure of the particular tires on the trailer so as to supply air to the tires at the desired pressure level in the event of a leak.
  • Air is directed from the control box to the leaking tire through one of the trailer axles, which either carries an air line from the control box, or is sealed and functions as an air conduit.
  • the pressurized air carried by the axles communicates with each pair of trailer tires mounted thereon through a rotary union assembly by which air flow is directed from a stationary air line to the valve stems on the rotating tires.
  • Pressure responsive valves are employed between each rotary union assembly and its associated tires so that upon the occurrence of a leak in one of the tires, the resulting pressure loss will cause one of the valves to open and allow air flow from the rotary union assembly to pass therethrough to the leaking tire.
  • a tire pressure management system includes at least an axle, a hubcap supported by the axle and having an interior and an exterior, and a rotary union mounted to the hubcap.
  • the rotary union includes at least rotary union housing providing a central bore, a fluid conduit having upstream and downstream ends, and a bearing in contact engagement with the fluid conduit via an inner race of the bearing, and in sliding engagement with a bearing sleeve via an outer race of the bearing.
  • the bearing sleeve in pressing contact with the central bore; and a seal, is disposed between the bearing and the downstream end of the fluid conduit.
  • FIG. 1 is a partial perspective view of a rotary union assembly of the present novel tire pressure management system shown secured to an outer wheel of a pair of tractor trailer tires mounted on a stationary axle.
  • FIG. 2 is a sectional side view of the rotary union assembly of the present novel tire pressure management system and associated axle spindle.
  • FIG. 3 is bottom plan view of the rotary union assembly of the present novel tire pressure management system.
  • FIG. 4 is a cross-sectional side view of the rotary union housing, air lines and associated seals preferably employed by the present novel tire pressure management system.
  • FIG. 5 is a cross-sectional side view of an alternate rotary union assembly of the present novel tire pressure management system and its associated bearings and bearing spacer.
  • FIG. 6 is a view in perspective of a push to connect fluid fitting of the rotary union assembly of FIG. 1.
  • FIG. 7 is a side elevation view of a pair of push to connect fluid fittings of the present novel tire pressure management system of FIG. 1.
  • FIG. 8 is a cross-section view of the rotary union housing of an alternative rotary union assembly of the present novel tire pressure management system showing an anti-rotational means.
  • FIG. 9 is a cross-section view of the rotary union housing of the alternative rotary union assembly of FIG. 8, of the present novel tire pressure management system showing an alternate anti-rotational means.
  • FIG. 10 is a block diagram of the present novel tire pressure management system of FIG. 1.
  • FIG. 11 is a cross-sectional side view of the rotary union housing, air lines, bearing sleeve, and associated seals preferably employed by the present novel tire pressure management system.
  • FIG. 12 is a side view in elevation of a rotary union housing formed from a
  • FIG. 13 is a top plan view of a pressure equalization structure of FIG. 11.
  • FIG. 14 is a side view in elevation of an embodiment of the pressure equalization structure of FIG. 13.
  • FIG. 15 is a side view in elevation of an alternate embodiment of the pressure equalization structure of FIG. 13.
  • FIG. 16 is a side view in elevation of an alternative embodiment of the pressure equalization structure of FIG. 13.
  • FIG. 17 is a perspective view of an alternate cartridge bearing secured to a fluid conduit.
  • FIG. 18 is a partial cut away, perspective view of the alternate cartridge bearing secured to the fluid conduit of FIG. 17.
  • FIG. 19 is a partial cut away, perspective view of an alternate rotary union
  • FIG. 20 is a cross section view in elevation of an alternate rotary union assembly, and shows the inclusion of a first bearing confinement member.
  • FIG. 21 is a cross section view in elevation of the alternate rotary union assembly of FIG. 20, and shows the inclusion of a second bearing confinement member.
  • FIG. 22 is a cross section view in elevation of the alternate rotary union assembly of FIG. 20, and shows the inclusion of a third bearing confinement member.
  • the rotary union assembly 10 (also referred to herein as assembly 10, and rotary union 10) of the first preferred embodiment, while useable on a wide variety of movable vehicles employing stationary axles for automatically maintaining the inflation pressure of the pneumatic tires thereon, is particularly adapted for use on tractor trailers.
  • the assembly 10 of the first preferred embodiment will be described in conjunction with a pair of adjacent vehicle tires 12 and 14 mounted on a stationary tractor trailer axle 16 (also referred to herein as trailer axle 16, and axle 16). While identical rotary union assemblies 10 are provided at the end of each axle on the trailer to maintain the inflation pressure of the tires carried thereby, in each: the preferred embodiment; the alternate preferred embodiment; and the alternative preferred embodiment, reference will be made to only one such assembly and the pair of tires it services.
  • the trailer axle 16 which carries tires 12 and 14 is sealed and functions as a source for pressurized fluid, else houses an air supply line 18 to supply air to the rotary union assembly 10.
  • a fluid supply line 20 preferably provides air under pressure to the interior of the axle 16, else to an air supply line 18, from the conventional air compressor on the tractor via a standard pressure protection valve and control box (not shown) to pressurize the axle 16, else to pressurize the air supply line 18, at the cold tire pressure of the trailer tires.
  • FIG. 1 further shows that the axle 16 supports an axle plug 22, which in turn supports a push to connect fluid fitting 24.
  • the push to connect fluid fitting 24 is attached to and in fluid communication with a fill tube 26, which in a preferred embodiment is a flexible fill tube 26.
  • the flexible fill tube 26 is connected to a fluid conduit 28, which supplies pressurized air to the rotary union assembly 10.
  • the flexible fill tube 26 is secured to the fluid conduit 28, by a compression fitting 30.
  • a compression fitting or alternate mechanical means, could serve the function of the push to connect fluid fitting 24.
  • the rotary union assembly 10 is mounted to a hubcap 32, from an exterior 34 of the hubcap 32, and provides pressurized air, by way of an air delivery channel 36, to tire pressure hose fittings 38 that are secured to tire pressure hoses 40.
  • Each tire pressure hose 40 supplies the pressurized air to tire valve stems 42 of tires 12 and 14.
  • the rotary union assembly 10 provides a removable seal access cover 44, which mitigates escapement of pressurized fluid from the air delivery channel 36, the tire pressure hoses 40, and the tires 12 and 14.
  • the fluid conduit 28 provides a downstream end 48 and an upstream end 46
  • the rotary union assembly 10 further preferably includes a pair of bearings 50, in which each of the pair of bearings 50 provides an inner race and an outer race.
  • a first bearing 52, of the pair of bearings 50 is adjacent the downstream end 48, of the fluid conduit 28, while the second bearing 54, of the pair of bearings 50, is adjacent the upstream end 46, of the fluid conduit 28.
  • FIG. 2 further shows that in a preferred embodiment, the rotary union assembly 10, further includes a pair of fluid seals 56, with a first fluid seal 58, is preferably disposed between the first bearing 52, and the downstream end 48 of the fluid conduit 28, while the second fluid seal 62, of the pair of fluid seals 56, is preferably disposed between the second bearing 54, and the upstream end 46, of the fluid conduit 28.
  • the second fluid seal 62 mitigates transfer of an environment contained within an interior 64, of the hubcap 32, from entry into the pair of bearings 50.
  • FIG. 2 further shows that in a preferred embodiment, each of the pair of fluid seals 56 (58 and 62), provide a base portion (66 and 68 respectfully), and the rotary union assembly 10, further includes: a first fluid seal restraint 70, which is disposed between the first bearing 52, and the base portion 66 of the first fluid seal 58, and in pressing engagement with the external surface 60 of the fluid conduit 28; and a second fluid seal restraint 72, which is disposed between the base portion 68 of the second fluid seal 62, and in pressing engagement with the external surface 60 of the fluid conduit 28.
  • the rotary union 10 preferably includes a bearing spacer 74, disposed between the first bearing 52 and the second bearing 54 of the pair of bearings 50. The bearing spacer 74 provides stability of the first and second bearings (52, 54) during the process of pressing the pair of bearings 50 into a rotary union housing 76, of the rotary union assembly 10.
  • the second fluid seal 62 mitigates transfer of an environment contained within an interior 64, of the hubcap 32, from entry into the pair of bearings 50.
  • a spring loaded pressure relief valve 78 such as a poppet valve
  • a pressure relief seal 80 also referred to herein as a pressure equalization structure 80 (of FIG. 11)
  • an excess pressure collection chamber 82 which is provided by the rotary union housing 76, and is in contact adjacency with the exterior 34, of the hubcap 32, and shown by FIGS. 2 and 3
  • FIG. 4 shows a preferred embodiment that preferably includes at least the rotary union housing 76, supporting and confining the fluid conduit 28, within a central bore 84 (also referred to herein as channel 84), of the rotary union housing 76.
  • the fluid conduit 28 preferably provides the downstream end 48 and the upstream end 46.
  • the pair of bearings 50 Further shown by FIG. 4 is the pair of bearings 50; each of the pair of bearings 50 provides an inner race and an outer race. Each inner race of the pair of bearings 50, is in pressing communication with the external surface 60, of the fluid conduit 28, and each outer race of the pair of bearings 50, is in pressing communication with a bore surface 86 (also referred to herein as wall 86), of the central bore 84, of the rotary union housing 76.
  • the first bearing 52, of the pair of bearings 50 is adjacent the downstream end 48, of the fluid conduit 28, and the second bearing 54, of the pair of bearings 50, is adjacent the upstream end 46, of the fluid conduit 28.
  • FIG. 4 further shows that in a preferred embodiment, the rotary union 10 preferably includes a pair of fluid seals 56, the first fluid seal 58, of the pair of fluid seals 56, engages the external surface 60, of the fluid conduit 28, and is disposed between the first bearing 52, and the downstream end 48, of said fluid conduit 28.
  • the second fluid seal 62, of the pair of fluid seals 56 engages the external surface 60 of the fluid conduit 28, and is disposed between said second bearing 54, and the upstream end 46, of the fluid conduit 28.
  • the first fluid seal 58 provides the base portion 66, and the first fluid seal restraint 70, which is in pressing contact with the external surface 60 of the fluid conduit 28, abuts against the base portion 66, of the first fluid seal 58, to maintain the relative position of the first fluid seal 58, adjacent the bore surface 86, of the central bore 84; and the second fluid seal 62, provides the base portion 68, and the second fluid seal restraint 72, which is in pressing contact with the external surface 60 of the fluid conduit 28, abuts against the base portion 68, of the second fluid seal 62, to maintain the relative position of the second fluid seal 62, adjacent the bore surface 86, of the central bore 84.
  • the rotary union housing 76 further provides a fluid distribution chamber 88 (also referred to herein as a fluid chamber 88), which is in fluid communication with the downstream end 48, of the fluid conduit 28.
  • the fluid chamber 88 receives pressurized air from the fluid conduit 28, and transfers the received pressurized air to the tires 12 and 14 (of FIG. 1).
  • FIG. 5 shows that in a preferred embodiment, the hubcap 32 provides an attachment aperture 90.
  • the attachment aperture 90 is preferably disposed between the interior 64 and the exterior 34, of the hubcap 32.
  • the attachment aperture 90 provides an axis of rotation, which is preferably substantially aligned with an axis of the axle 16 (of FIG. 1).
  • the rotary union housing 76 provides at least an attachment member 92, which preferably is in mating communication with the attachment aperture 90.
  • FIG. 5 further shows that the fluid conduit 28 provides a fluid communication portion 94, which extends beyond the attachment member 92, and into the interior of said hubcap 32.
  • FIGS. 6 and 7 show the push to connect fluid fitting 24, of a preferred embodiment.
  • the push to connect fitting model No. 1868X4 by Eaton
  • FIG. 7 shows that in a preferred embodiment, two push to connect fluid fittings 24, are secured to the axle plug 22. In a preferred embodiment, one of the pair of push to connect fluid fittings 24 is in fluid communication with the air supply line 18, while the other is in fluid communication with the fill tube 26.
  • FIG. 7 shows that in a preferred alternate embodiment, the axle plug 22, provides a pressure transfer conduit 96, which is used to disburse pressurized air, which may accumulate in the interior 64, of the hubcap 32 (both of FIG. 4), back into the axle housing 16, when the air supply line 18, is utilized to convey pressurized air to the rotary union 10 (of FIG. 2).
  • FIG. 96 which is used to disburse pressurized air, which may accumulate in the interior 64, of the hubcap 32 (both of FIG. 4), back into the axle housing 16, when the air supply line 18, is utilized to convey pressurized air to the rotary union 10 (of FIG. 2).
  • the fill tube 26 is a flexible fill tube formed from a polymer, such as a polyurethane based material, else a metallic material, such as a shape memory alloy.
  • FIG. 8 further shows that when the flexible fill tube 26 is connected to the push to connect fluid fitting 24, an anti-rotational means 98 is incorporated into the rotary union 10.
  • the anti-rotational means 98 has a first end 100, and a second end 102.
  • the first end 100 of the anti-rotational means 98 is secured to the flexible fill tube 26, adjacent the fluid communication portion 94.
  • the second end 102, of the anti-rotational means 98 connects to the push to connect fluid fitting 24.
  • the anti-rotational means 98 mitigates rotation of the fill tube 26, when the rotary union housing 76, in conjunction with the hubcap 32, rotates about the fluid conduit 28.
  • a coiled spring has been found useful as the anti-rotational means 98
  • a torsion bar 104 (of FIG. 9) has been found useful to serve as an anti-rotational means 98.
  • any of a host of mechanical structures, which serve to mitigate rotation of the fill tube 26, when the rotary union housing 76, in conjunction with the hubcap 32, rotates about the fluid conduit 28 may be employed to serve this purpose.
  • the rotary union housing 76 in addition to the fluid chamber 88, further provides the air delivery channel 36, which is in fluid communication with, and extending radially from, said fluid chamber 88, as shown by FIG. 8, the fluid conduit 28, further provides a retention barb 106, protruding from the fluid conduit 28, and communicating with an interior surface 108, of said flexible fill tube 26.
  • the retention barb 106 mitigates an inadvertent removal of said flexible fill tube 26, from the fluid conduit 28.
  • the retention barb 106 is preferably positioned adjacent to, and downstream from the compression fitting 30, as shown by FIG. 9.
  • FIG. 10 shows a tire pressure management system 110, which preferably includes at least a fluid pressure controller 112, which in a preferred embodiment controls the flow of pressurized air into and out of the tires 12 and 14.
  • the source of the pressurized air is a trailer air tank 114.
  • the trailer air tank 114 is in fluidic communication with a tire pressure tank 116.
  • the pressurized air from the trailer air tank 114 passes through an air regulator 118, and then through an air inlet control valve 120, operating under the control of the fluid pressure controller 112.
  • the tire pressure management system 110 further includes at least: an air outlet valve 122, in fluid communication with the tire pressure tank 116, and under the control of the fluid pressure controller 112; a tire pressure tank pressure gauge 124, in fluid communication with the tire pressure tank 116, and in electronic communication with the fluid pressure controller 112; and an air pressure supply valve 126, in fluid communication with the tire pressure tank 116, and under the control of the fluid pressure controller 112.
  • the air pressure supply valve 126 supplies pressurized air to, or conversely, receives pressurized air from the air supply line 18, depending on whether the pressure in the tire (12,14), is above or below a desired pressure level.
  • pressurized air that flows into or out of the rotary union 10 is modulated by a dual flow control valve 128.
  • the dual flow control valve 128, responds to air pressure supplied by the air supply line 18, by opening a spring loaded valve member, which allows pressurized air to flow out of the tire (12,14), when the pressure in the tire (12, 14), is greater than the air pressure in the air supply line 18.
  • the dual flow control valve 128, promotes the flow of pressurized air into the tire (12, 14), when the pressure level within the tire 12, 14 is less than the air pressure in the air supply line 18.
  • FIG. 10 further shows that the tire pressure management system 110, further preferably includes a tire pressure monitoring sensor 130, disposed between the dual flow control valve 128, and the tire (12,14), and in electronic
  • the tire pressure monitoring sensor 130 measures the level of pressure within the tire (12, 14), and relays the measured pressure level to the fluid pressure controller 112.
  • the fluid pressure controller 112 compares the measured pressure level within the tire (12, 14) to a target pressure, maintains the pressure available in the tire pressure tank 116 at the target level, and directs the air pressure supply valve 126, to release pressurized air to the dual flow control valve 128, which activates to promote either inflation, or deflation of the tire (12, 14), to bring the pressure level within the tire (12, 14) into balance with the target pressure level.
  • the fluid pressure controller 112 directs the air pressure supply valve 126, to disengage.
  • the fluid pressure controller 112 operates both the air outlet valve 122, and the air inlet control valve 120, to maintain the pressure within the tire pressure tank 116, at a predetermined pressure level. For example, but not by way of limitation, if the tire pressure of the tires (12, 14) is above the target pressure level, the fluid pressure controller 112, will crack open the air outlet valve 122, to allow relief of pressure from the system; and if the tire pressure of the tires (12, 14) is below the target pressure level, the fluid pressure controller 112, will crack open the air inlet control valve 120, to allow pressure to build in the system.
  • FIG. 11 shows a preferred embodiment that preferably includes at least the rotary union housing 76, supporting and confining the fluid conduit 28, within a central bore 84 (also referred to herein as channel 84 of FIG. 4), of the rotary union housing 76.
  • the fluid conduit 28 preferably provides the downstream end 48 and the upstream end 46.
  • FIG. 4 is the pair of bearings 50; each of the pair of bearings 50 provides an inner race and an outer race.
  • Each inner race of the pair of bearings 50 is in pressing communication with the external surface 60, of the fluid conduit 28, and each outer race of the pair of bearings 50, is in pressing communication with a bore surface 86 (also referred to herein as wall 86), of the central bore 84, of the rotary union housing 76.
  • the first bearing 52, of the pair of bearings 50 is adjacent the downstream end 48, of the fluid conduit 28, and the second bearing 54, of the pair of bearings 50, is adjacent the upstream end 46, of the fluid conduit 28.
  • FIG. 11 further shows that in a preferred embodiment, the rotary union 10 preferably includes a pair of fluid seals 56, the first fluid seal 58, of the pair of fluid seals 56, engages the external surface 60, of the fluid conduit 28, and is disposed between the first bearing 52, and the downstream end 48, of said fluid conduit 28.
  • the second fluid seal 62, of the pair of fluid seals 56 engages the external surface 60 of the fluid conduit 28, and is disposed between said second bearing 54, and the upstream end 46, of the fluid conduit 28.
  • the first fluid seal 58 provides the base portion 66, and the first fluid seal restraint 70, which is in pressing contact with the external surface 60 of the fluid conduit 28, abuts against the base portion 66, of the first fluid seal 58, to maintain the relative position of the first fluid seal 58, adjacent the bore surface 86, of the central bore 84; and the second fluid seal 62, provides the base portion 68, and the second fluid seal restraint 72, which is in pressing contact with the external surface 60 of the fluid conduit 28, abuts against the base portion 68, of the second fluid seal 62, to maintain the relative position of the second fluid seal 62, adjacent the bore surface 86, of the central bore 84.
  • the rotary union housing 76 further provides a fluid distribution chamber 88 (also referred to herein as a fluid chamber 88), which is in fluid communication with the downstream end 48, of the fluid conduit 28.
  • the fluid chamber 88 receives pressurized air from the fluid conduit 28, and transfers the received pressurized air to the tires 12 and 14 (of FIG. 1).
  • the rotary union housing 76 provides at least the attachment member 92, which preferably is in mating communication with the attachment aperture 90 of the hubcap 32, and further shows that the fluid conduit 28 provides a fluid communication portion 94, which extends beyond the attachment member 92, and into the interior of said hubcap 32.
  • the rotary union 10 preferably includes a bearing sleeve 132, and the bearing sleeve 132, is preferably in pressing contact with the central bore 84, or may be joined to the central bore 84, of the rotary union housing 76, by means of the use of an adhesive, weld, solder, or other mechanical joint techniques, such as through an insert molding process.
  • the pair of bearings 50 each provide an inner race and an outer race
  • each inner race of the pair of bearings 50 is preferably in direct contact adjacency with the external surface 60, of the fluid conduit 28, while the outer race of each of the pair of bearings 50 are preferably in pressing communication with the internal surface of the bearing sleeve 132.
  • the bearing sleeve 132 may be formed from a composite material; a metallic material (such as, but not limited to brass, aluminum, stainless steel, iron or steel); or from a polymeric materials (such as, but not limited to nylon, DelranTM, phenolic, or TeflonTM).
  • an excess pressure collection chamber 82 is provided by the rotary union housing.
  • the excess pressure collection chamber 82 is preferably adjacent the exterior 34, of the hubcap 32, and serves to accommodate a pressure equalization structure 80.
  • the pressure equalization structure 80 is preferably disposed within the excess pressure collection chamber 82, and in contact adjacency with the exterior 34, of the hubcap 32.
  • the mechanical configuration of the cooperation between the pressure equalization structure 80, and the excess pressure collection chamber 82 may take on a plurality of forms.
  • FIG. 12 shows a side view in elevation of a rotary union housing 76, formed from a polymeric materials (such as, but not limited to nylon, DelranTM, phenolic, or TeflonTM), and providing a threaded insert 134, the threaded insert 134 molded into the polymer rotary housing 76, confined within the air delivery channel 36, and in fluidic communication with the fluid chamber 88.
  • a polymeric materials such as, but not limited to nylon, DelranTM, phenolic, or TeflonTM
  • FIG. 13 shows a top plan view of the pressure equalization structure 80 of FIG. 11.
  • the pressure equalization structure 80 is a filter material (of metal, fiber, or polymer, such as, but not limited to spun bonded polypropylene) as a top layer, and a bottom layer is preferably formed from flashspun high-density polyethylene fibers that promotes the transfer of air, while mitigating the transfer of dirt and water.
  • FIG. 14 shows a side view in elevation of a preferred component of the bottom layer 136, of the pressure equalization structure 80, of FIG. 13. While FIG. 15, shows a side view in elevation of a preferred component of the top layer 138, of the pressure equalization structure 80, of FIG. 13. And FIG. 16, shows a side view in elevation of a combination 140, of the preferred bottom layer 136, applied to an external surface of the top layer 138.
  • FIG. 17 shows an alternate cartridge bearing assembly 142, having a cartridge bearing 144, secured to a fluid conduit 146, while FIG. 18, shows a partial cut away, perspective view of the alternate cartridge bearing assembly 142, having the cartridge bearing 144, secured to the fluid conduit 146, of FIG. 17.
  • the cartridge bearing 144 preferably includes a bearing sleeve 148 in sliding communication with an outer race 150, of a bearing 152.
  • the cartridge bearing 144 further preferably includes a bearing constraint 154, which is preferably in pressing contact with an internal surface 156, of the bearing sleeve 148.
  • the bearing constraint 154 is in contact adjacency with the outer race 150, of the bearing 152.
  • the fluid conduit 146 To assure registration of the cartridge bearing 144, to the fluid conduit 146, the fluid conduit 146, provides a bearing support feature 158.
  • an inner race 160, of the bearing 152 is in sliding communication with an outer surface 162, of the fluid conduit 146, and in contact adjacency with the bearing support feature 158.
  • FIG. 19 shows an alternate rotary union assembly 200 (“RU 200"), includes at least the alternate cartridge bearing assembly 142, secured to a rotary union housing 202, which in turn is attached to the hubcap 32 from the exterior of the hubcap 34.
  • the rotary union housing 202 includes a main body 204, which communicates directly with the hubcap 32, a cover portion 206, secured to the main body 204, and a seal 208 disposed between the main body 204, and the cover portion 206.
  • the main body 204 provides; a cartridge bearing support feature 210, which is in supporting contact adjacency with the bearing sleeve 148; a primary seal support feature 212, supporting a primary seal
  • FIG. 20 shows an alternate rotary union assembly 300 (also referred to herein as rotary union 300).
  • the rotary union 330 includes at least, but is not limited to, a rotary union housing 302, which provides a fluid distribution channel 304, and a central bore 306.
  • the rotary union 300 further preferentially includes a bearing sleeve 308 that is in sliding contact adjacency with the central bore 306. Further, bearing sleeve 308 accommodates a fluid conduit 310.
  • the fluid conduit 310 provides a fluid pathway for pressurized fluid emanating from an axel of a vehicle, which confines the pressurized fluid, to the fluid distribution channel 304.
  • the fluid conduit 310 features an internal surface 312, an external surface 314, a downstream end 316, and an upstream end 318.
  • the fluid conduit 310 is supported by the bearing sleeve 308.
  • the fluid conduit 310 provides a bearing support feature 320, the bearing support feature 320, is preferable adjacent the downstream end 316, of the fluid conduit 310.
  • the bearing support feature 320 provides a fluid delivery aperture 322.
  • the fluid delivery aperture 322 provides a fluidic pathway from the interior surface 312, of the fluid conduit 310, to the exterior surface 314, of the fluid conduit 310.
  • the bearing sleeve 308 confines and supports a bearing 324.
  • the bearing 324 provides an inner race 326, and an outer race 328.
  • the inner race 326 is in pressing engagement, i.e., press fit on to, the external surface 314 of the fluid conduit 310, while it is in contact adjacency with the bearing support feature 320
  • the outer race 328, of the bearing 324 is in sliding communication with an internal surface 330, of the bearing sleeve 308.
  • the preferred rotary union 300 includes a fluid seal 332, disposed between bearing sleeve 308, and the rotary union housing 320. The fluid seal 332, mitigates fluid leaks between the bearing sleeve 308, and the rotary union housing 302, while promoting fluid transfer from the pressurized fluid confined by the axel of the vehicle, to a tire supporting the axel of the vehicle.
  • the rotary union 300 further includes a top cover 334, which in a preferred embodiment, is a "snap-on" type cover.
  • the top cover provides a 334, provides a detent 336, while the rotary union housing 302 provides a land 338, which aligns correspondingly with the detent 336.
  • an attachment feature 340 is disposed between the detent 336, and the land 338.
  • the attachment feature is an o-ring.
  • FIG. 20 further shows that the rotary union 300, preferably further includes a pneumatic seal 342.
  • the pneumatic seal 342 is preferably supported by the rotary union housing 302, and is in contact adjacency with the internal surface 330, of the bearing sleeve 308, and in contact adjacency with the external surface 314, of said fluid conduit 310.
  • the pneumatic seal 342 is offset from a bearing confinement member 354, such that a gap 343, is formed between the bearing confinement member 354, and the pneumatic seal 342.
  • the gap 343, accommodates an obstruction free operation of the pneumatic seal 342, which in a preferred embodiment is preferably a lip seal type pneumatic seal.
  • a gap 355 is formed between the bearing confinement member 354, and bearing 324b. The gap 355 promotes noninterference of the operation of bearings 324 and 324b.
  • the bearing sleeve 308 provides a fluid transfer port 344.
  • the fluid transfer port 344, the fluid transfer port 344 is preferably in fluid communication with the fluid distribution chamber 304, and the fluid distribution chamber 344, is in fluidic communication with a tire inflation port 346, provided by the rotary union housing 302.
  • the rotary union housing 302 provides a bearing sleeve restraint land 348.
  • the bearing sleeve restraint land 348 is positioned adjacent the top cover 334, and accommodates a bearing sleeve retention member 350, which in a preferred embodiment is a snap-ring that nests within the bearing sleeve restraint land 350.
  • the bearing sleeve retention member 350 is adjacent the bearing sleeve 308, mitigates an inadvertent dislodgment of the bearing 308, from within the rotary union housing 302.
  • the bearing sleeve 308 provides an anti fluid escapement member land 352.
  • the anti fluid escapement member land 352 is adjacent the pneumatic seal 342.
  • the fluid seal 332, mitigates fluid transfer between the rotary union housing 302, and the exterior 34 (of FIG. 2), of the hubcap 32 (of FIG. 2), and promotes fluid transfer between fluid distribution chamber 304, and the tire inflation port 346.
  • the bearing sleeve 308 provides a bearing registration feature 356, adjacent the bearing sleeve restraint land 348, and in contact adjacency with the outer race 328, of said bearing 324; and a retention lip 358, adjacent the downstream end 316, of said fluid conduit 310, and in contact adjacency with a bearing sleeve registration feature 360, provided by the rotary union housing 302.
  • FIG. 20 shows that in a preferred embodiment the rotary union housing 303, provides a hubcap attachment feature 362, the hubcap attachment feature 362, is shown to be preferably adjacent the central bore 306.
  • the hubcap attachment feature 362 provides a pneumatic seal aperture 364, which accommodates the fluid conduit 310, and a second pneumatic seal 366.
  • the second pneumatic seal nests within the pneumatic seal aperture 364.
  • the second pneumatic seal 366 is confined within the pneumatic seal aperture 364, by a press plug 368, which is in pressing contact adjacency with the pneumatic seal aperture 364.
  • FIG. 21 shows an alternate bearing confinement member to be a snap-ring 370, nested within a snap-ring land provides by the rotary union housing 302.
  • the snap-ring 370 is in contact adjacency with an outer race 328b, of the bearing 324b.
  • FIG. 22 shows that the bearing confinement member includes at least, but is not limited to: a snap ring land 372, adjacent the first pneumatic seal 342; a snap ring 374, disposed within the snap ring land 372; and a linear force member 376, disposed between the snap ring 374, and the bearing 324b.
  • the linear force member 376 is in pressing contact with the snap ring 374, and in further pressing contact with the outer race 32bb, of the bearing 324b.

Abstract

L'invention concerne un système de gestion de pression de pneu (110) comprenant au moins un essieu (16), un enjoliveur (32) supporté par l'essieu (16) et ayant un intérieur (64) et un extérieur (34), et un raccord rotatif (10) monté sur l'enjoliveur (32). Le raccord rotatif (10) comprend au moins un boîtier de raccord rotatif (76) fournissant un alésage central (84), un conduit de fluide (28) ayant des extrémités amont (46) et aval (48), et un palier en prise de contact avec le conduit de fluide (28) par l'intermédiaire d'un chemin de roulement intérieur du palier, et en prise coulissante avec un manchon de palier (132) par l'intermédiaire d'un chemin de roulement extérieur du palier. Le manchon de palier (132) en contact de pression avec l'alésage central (84) ; et un joint d'étanchéité, est disposé entre le palier et l'extrémité aval du conduit de fluide (28).
PCT/US2018/042068 2017-07-13 2018-07-13 Système de gestion de pression de pneu WO2019014580A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2018301852A AU2018301852B2 (en) 2017-07-13 2018-07-13 Tire pressure management system
EP18831102.1A EP3652000A4 (fr) 2017-07-13 2018-07-13 Système de gestion de pression de pneu
BR112020000752-8A BR112020000752A2 (pt) 2017-07-13 2018-07-13 sistema de gerenciamento de pressão dos pneus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15/649,004 2017-07-13
US15/649,004 US20180304699A1 (en) 2016-03-31 2017-07-13 Tire pressure management system

Publications (1)

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WO2019014580A1 true WO2019014580A1 (fr) 2019-01-17

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EP (1) EP3652000A4 (fr)
AU (1) AU2018301852B2 (fr)
BR (1) BR112020000752A2 (fr)
WO (1) WO2019014580A1 (fr)

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WO2020215063A3 (fr) * 2019-04-19 2021-04-29 Airgo Ip, Llc Système de gestion de pression de pneu
US11376898B1 (en) 2021-07-19 2022-07-05 Globetech Manufacturing, Inc. Air inflation system
WO2022234443A1 (fr) 2021-05-04 2022-11-10 Rubber Nano Products (Proprietary) Limited Procédé de fonctionnalisation d'un matériau élastomère et son utilisation dans des formulations de caoutchouc

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Publication number Priority date Publication date Assignee Title
WO2020215063A3 (fr) * 2019-04-19 2021-04-29 Airgo Ip, Llc Système de gestion de pression de pneu
WO2022234443A1 (fr) 2021-05-04 2022-11-10 Rubber Nano Products (Proprietary) Limited Procédé de fonctionnalisation d'un matériau élastomère et son utilisation dans des formulations de caoutchouc
US11376898B1 (en) 2021-07-19 2022-07-05 Globetech Manufacturing, Inc. Air inflation system

Also Published As

Publication number Publication date
EP3652000A1 (fr) 2020-05-20
BR112020000752A2 (pt) 2020-07-14
AU2018301852A1 (en) 2020-02-27
EP3652000A4 (fr) 2021-04-14
AU2018301852B2 (en) 2021-04-29

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