WO1980001264A1 - Dispositif de sablage - Google Patents

Dispositif de sablage Download PDF

Info

Publication number
WO1980001264A1
WO1980001264A1 PCT/SE1979/000251 SE7900251W WO8001264A1 WO 1980001264 A1 WO1980001264 A1 WO 1980001264A1 SE 7900251 W SE7900251 W SE 7900251W WO 8001264 A1 WO8001264 A1 WO 8001264A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction material
container
sanding device
injector
pressure gas
Prior art date
Application number
PCT/SE1979/000251
Other languages
English (en)
Inventor
H Linden
Original Assignee
H Linden
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
Application filed by H Linden filed Critical H Linden
Priority to DE19792953427 priority Critical patent/DE2953427A1/de
Publication of WO1980001264A1 publication Critical patent/WO1980001264A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B39/00—Increasing wheel adhesion
    • B60B39/02—Vehicle fittings for scattering or dispensing material in front of its wheels
    • B60B39/021—Details of the dispensing device
    • B60B39/025—Details of the dispensing device related to the control system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B39/00—Increasing wheel adhesion
    • B60B39/02—Vehicle fittings for scattering or dispensing material in front of its wheels
    • B60B39/04—Vehicle fittings for scattering or dispensing material in front of its wheels the material being granular, e.g. sand
    • B60B39/08—Vehicle fittings for scattering or dispensing material in front of its wheels the material being granular, e.g. sand the dispensing being effected by fluid means
    • B60B39/086—Vehicle fittings for scattering or dispensing material in front of its wheels the material being granular, e.g. sand the dispensing being effected by fluid means dispensing being effected by gas

Definitions

  • the present invention relates to a device for spreading sand or the like on the tyre surfaces of a vehicle to facilitate starting and braking on slippery roads.
  • light vehicles such as passenger cars and small lorries
  • studded tyres are, however, usually not used on heavy vehicles, such as buses and lorries.
  • the use of snow chains and the like are restricted to roads being covered by a thick sheet of ice/snow.
  • Particularly starting and braking on an icy ground is therefore a great problem for these vehicles.
  • the problem of these vehicles to ascend ice-covered slopes is well-known.
  • Even on passenger cars the studded tyres lead to a considerable wear of the roadway as well as an increased uel consumption.
  • a fundamental idea of the invention is that the friction material is spread onto the tyres of the vehicles instead of on the roadway. " On all driving, even in very cold weather, heat is generated in the tyres, which on winter roads always causes -the tyres to be moist or -wet on the surface. A relatively fine material blown or sprayed against the tyre surface will then adhere thereto and give rise to a considerably increased sliding friction between the tyre and an icy ground. As said friction material, sand or other gritty material may be used.
  • the material should have such a size distribution, e.g. 1 - 3 mm, that it to a considerable extent adheres to a . moist tyre surface when sprayed or blown thereon with sufficient force, as well as gives the desired friction.
  • the friction material should also have relatively good free-running properties.
  • Particularly suitable friction materials are e.g. clay-free sand materials, such as dry blasting sand, grinding sand and the like.
  • the new sanding device may comprise one or more storage containers for an essentially freely running friction material as above which are connected to a conduit system having outlet ports near the rear and/or front wheels of the vehicle, preferably the driving wheels.
  • the container or containers are disposed in such a way that the friction material through gravity runs into the conduit system, to which a pressurized gas source, e.g. compressed-air, can be connected when necessary.
  • a pressurized gas source e.g. compressed-air
  • the part of said conduit system where the friction material meets the pressurized gas hereinafter called the injector, may be designed in different ways.
  • an injector is arranged for each outlet port of the conduit system.
  • the injector may e.g. be designed as a lowered, preferably slightly . U-shaped portion of the conduit system, where the outlet of the container is connected.
  • the friction material is hereby essentially collected in the lowered portion and forms a "plug", which then can be blown onto the tyres by means of the compressed-air system.
  • a partition wall or guiding plate may be disposed where the the stream of compressed-air meets the material running down from the container, as is further explained below. Another suitable embodiment of the injector will be described further on.
  • the outlet ' ports of the conduit system are suitably provided with appropriate spreader means or nozzles, so that the friction material is evenly spread on the tyre surfaces.
  • connection between the container and the respective injector should be as short as possible and have such a design that it facilitates the transport of the friction material therethrough.
  • One single container for the friction material may be used, but at least for bigger vehicles it may be suitable to dispose a container on either side of
  • the containers may advantageously be placed under suitably located seats. In this way the container is heated at the same time as the passenger compartment, and condensation of water in the container, which may cause clogging of the friction material, is prevented.
  • the container or containers even in e.g. buses, may be provided with heating means for the friction material.
  • Said heating means suitably consist of heating coils, particularly electric ones, which are arranged to be surrounded by the friction material.
  • one or more of the connection between the container and the injector, the injector, the conduit system up to the spray nozzles as well as the spray nozzles may be provided with suitable heating devices, such as electric heating coils.
  • the sanding system according to the invention is suited for most kinds of motor vehicles, both for vehicles already having a built-in compressed-air system, such as buses and lorries, and for passenger cars etc. where a source of pressurized gas easily can be provided by e.g. a compressor and a compressed-air container. Also a spare tyre may be used as said pressurized gas source.
  • the sanding device may also be used on other types of vehicles, including trailers, etc..
  • the system is suitably arranged so that it can be actuated electrically from the driver's compartment, e.g. by a push button or another control, which is connected to a solenoid valve or the like for connection of the pressurized gas.
  • the system can be connected to the brake system of the vehicle, so that a blow-out of friction material onto the tyres is effected on braking.
  • the blow-out may be effected continuously as long as the brake pedal is depressed or as "showers" at suitable intervals.
  • the sanding unit according to the invention is easy to install, and owing to its simple design it is reliable and working.
  • the consumption thereof is reduced essentially in comparison with the previously known devices.
  • Figure 1 is a schematic side-elevation of a part of a lorry chassis provided with an embodiment of a sanding device according to the invention
  • Figure 2 is a schematic top plan view of a part of the lorry chassis of Fig. 1;
  • Figure 3 is a schematic perspective view of the sanding device, according to Figs. 1 and 2;
  • Figure is a perspective view of the main part of another embodiment of a sanding device according to the invention.
  • Figure 5 is an embodiment of a spray nozzle of the device shown in Fig. -».
  • a container 1 for friction material la e.g. grinding sand or blasting sand
  • a lorry chassis 2 in a suitable way in front of each pair of rear wheels 3.
  • Each container 1 is via a connecting part . at its bottom connected to an air conduit 5 ending in spray nozzles 6 in front of each pair of rear wheels 3.
  • the air conduits 5 are in the points of connection designed as a storage portion or injector 7.
  • Each air conduit 5 is further via a suitable valve 8, e.g. an electrovalve, connected to an existing compressed-air conduit 9 of the lorry for other functions - e.g. the parking brake - which in turn is connected to a compressed-air container (not shown).
  • the container 1 is box-shaped, but it may of course have any other appropriate design. At the top it is provided with a removable cover lb, which is tight and properly securable to prevent penetration of moisture as far as possible.
  • the container 1 may on its inner side be provided with electric heating coils (not shown) for heating of the friction material la. Said heating coils are preferably arranged in the container space so that they are surrounded by the material la.
  • the container 1 may be provided with a transparent portion permitting a reading of the filling level from outside. It may also be provided with a suitable sensor, which gives a signal when sanding material must be added.
  • the injector 7 is designed as a slightly U-shaped portion, which is lowered in relation to the adjacent parts of the air conduit 5 and to whose "bottom" the connecting part 4 is attached.
  • a guiding plate 10 is disposed at the connection of the connecting part 4. Said guiding plate 10 serves to prevent friction material la from being pressed upwards in the connecting part * .
  • Friction material la runs through gravity into the injector 7 from the container 1 via the connecting part * ⁇ . Through the guiding plate 10 the material la is prevented from completely filling the rear branch of the U- shaped injector.
  • the level to which the front branch is filled depends, apart from on the free-running properties of the friction material la, primarily on
  • the geometrical design of the injector 7. is designed and given such dimensions that the injector 7 always contains a quantity of friction material la which is adapted to the connected air pressure and the vehicle.
  • the actual design of the nozzles 6 is, however, not critical, but they may have any suitable conventional design.
  • a splash guard 11 is suitably provided to prevent the nozzle from being obstructed by snow, ice, etc. being thrown up by the wheels.
  • the electrovalves 8 are connected to the instrument panel of the lorry in a suitable way (not shown), so that they e.g. by pressing a push button can be caused to open and allow compressed-air from the conduit 9 to be pressed into the conduit 5.
  • the control circuit for the electrovalves 8 may be
  • each depression of the push button gives a "shower” of friction material, or that the control button can be locked in the depressed position and give showers at suitable time intervals as long as it is depressed. This may e.g. be achieved by means of an adjustable flashing relay.
  • the electrovalves 8 are preferably also arranged in such a way
  • the brake system of the vehicle may be actuated by the brake system of the vehicle.
  • This may for example be effected by means of suitably located sensors of the pressure of the brake conduits, which via a control circuit actuate the electrovalves 8 to open, when a predetermined brake pressure is exceeded.
  • the control circuit of the valves are connected to the brake light
  • the sanding assembly shown in Figs. 1 to 3 operates in the following way:
  • ⁇ 8 are open as long as the push button etc. is depressed, or that the valves 8 open and close at suitable intervals.
  • the conduits 5 are connected to the conduit 9, which communicates with the
  • the injector 7 is
  • Figs. ⁇ r and 5 show an example of a sanding unit designed to be installed in vehicles having no compressed-air system, which sanding unit is particularly suitable for passenger cars.
  • the device comprises a container 12 for friction material and an injector 13, which is connected both to a compressed-air source and to a conduit system, indicated by the reference numeral 14, leading to outlet ports 9 near the wheels, onto which the friction material is to be sprayed.
  • the compressed-air source comprises a compressor 15 and a pressure tank 16. The latter is connected to the injector 13 via a solenoid valve 17 and a conduit* 18.
  • the assembly is arranged in a frame 19, which suitably is placed in the luggage compartment of the car.
  • the injector 13 which to facilitate the description thereof is shown with a transparent wall, comprises a cylinder part 20 having an open top, into which a bottom connection piece 21 of the container 12 is fitted.
  • a conduit or tube 22 is arranged having a V-shaped opening 23.
  • the conduit 22 extends through the cylinder wall 20 and
  • OMPI WIPO is terminated in one end by a connection 24 for the compressed-air conduit 18, while its other end 25 is bent upwards and designed to permit the above conduit system 14 to be fixed thereto.
  • the conduit system 1 ends in suitable nozzles, e.g. as shown in Fig. 5 and described below. 5
  • the above described device is easily installed. In a passenger car it is, as mentioned above, preferably placed in the luggage compartment. The whole wall 19a of the frame 19 is then turned outwards to permit the air pressure of the tank 16 to be read on a pressure gauge 26 fixed to the wall 19a.
  • the compressor 15 and the solenoid valve 17 are connected to the
  • the solenoid valve 17 being connected to the stop light circuit of the vehicle by a switch on the instrument panel.
  • a second control is preferably arranged on the instrument panel through which the solenoid valve 17 can be actuated directly, suitably pulsatingly.
  • plastic hose is forked with conduits leading to each rear wheel and/or front wheel of the vehicle, where they are connected to nozzles according to Fig. 5.
  • nozzles comprise an elbow tube 27, one end of which is threaded and provided with two nuts 28 and 29.
  • a "splash guard" 30 (corresponding to 11 in Fig. 1) is fixed to the outer nut 29. Said nozzle may easily be fixed
  • the nozzles are preferably directed towards the upper part of the tyres.
  • a suitable friction material e.g. washed and dried sand having a size
  • the sand runs down into the injector 20 through a hole in the bottom connection piece 21 of the container 12. In the case shown said opening should be smaller than the diameter of the connection piece 21 in
  • the solenoid valve 17 opens the connection to the injector 20, as soon as the brake pedal is depressed and the stop light is lighted, i.e. before any braking effect is achieved.
  • valve 17 By switching on the above second control the valve 17 can be caused to open e.g. in pulses and douche the tyre with sand without depressing the brake pedal and independently of whether the brake sensing circuit is switched in.
  • a suitable volume of the sand container 12 for use in a passenger car may e.g. be about 10 liters, and a correspondingly suitable volume of the compressed-air tank 16 may be e.g. about 6 liters.
  • a suitable volume of the sand container 12 for use in a passenger car may e.g. be about 10 liters, and a correspondingly suitable volume of the compressed-air tank 16 may be e.g. about 6 liters.
  • the tyre will already be prepared when the actual brake action takes place, since the brake light is lighted as soon as the brake pedal is touched.
  • the friction material being sprayed by pressure onto the tyre remains adhered thereto for some time even after contact with the roadway.
  • the tyres therefore engage directly with the roadway on e.g. starting after retardation to standstill.
  • the sand consumption will be low, since e.g. when driving uphill it will not be necessary to "douche" the tyres so often.
  • the above shown and particularly described devices may of course be varied and modified within the scope of the subsequent claims.
  • the vehicles may for example be prepared for or equipped with the new sanding system already when they are manufactured.
  • the injector and the nozzles may be designed in various ways.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Body Structure For Vehicles (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

Un dispositif de sablage pour des vehicules, tels que des camions, des bus, des voitures de transport de passagers, etc., comprenant au moins un recipient (1) pour une substance de friction (1a) et des moyens pour sa decharge, les dits moyens (1, 4-10) etant disposes pour le soufflage ou la pulverisation de cette substance de friction (1a) directement sur les surfaces des pneumatiques (3) des roues avant et/ou arriere au travers d'ouvertures de decharge (6), de telle maniere que de la substance de friction adhere a la surface des pneumatiques lorsqu'ils sont humides.
PCT/SE1979/000251 1978-12-15 1979-12-14 Dispositif de sablage WO1980001264A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792953427 DE2953427A1 (de) 1978-12-15 1979-12-14 Sanding device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7812910 1978-12-15
SE7812910A SE7812910L (sv) 1978-12-15 1978-12-15 Sandningsanordning

Publications (1)

Publication Number Publication Date
WO1980001264A1 true WO1980001264A1 (fr) 1980-06-26

Family

ID=20336617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1979/000251 WO1980001264A1 (fr) 1978-12-15 1979-12-14 Dispositif de sablage

Country Status (5)

Country Link
FI (1) FI793896A (fr)
FR (1) FR2443937A1 (fr)
NO (1) NO794074L (fr)
SE (2) SE7812910L (fr)
WO (1) WO1980001264A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5580106A (en) * 1995-07-24 1996-12-03 Dulberg; Joel H. Traction device

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832619A (en) * 1955-08-31 1958-04-29 Frank P Davis Traction unit
US2933337A (en) * 1956-09-19 1960-04-19 Katz David Anti-skid implement for automobiles
US3140887A (en) * 1961-06-09 1964-07-14 Whitehead Bros Co Method and apparatus for applying traction sand to locomotive driving wheels
US3336064A (en) * 1965-07-27 1967-08-15 Wiegand Co Edwin L Liquid anti-freeze dispensing traction increasing device
FR2085497A7 (fr) * 1970-04-27 1971-12-24 Dubuc Paul
DE2214313A1 (de) * 1972-03-24 1973-10-04 Daimler Benz Ag Vorrichtung zum erhoehen der reibung zwischen der fahrbahn und den raedern von fahrzeugen, insbesondere von kraftfahrzeugen
GB1346840A (en) * 1970-11-10 1974-02-13 Bertin & Cie Apparatus for adhesion of a vehicle wheel to a road
DE2330865A1 (de) * 1973-06-16 1975-01-16 Hermann Glaser Druckluft-streuvorrichtung kombiniert mit auspuffschalldaempfer fuer kfz
DE2556263A1 (de) * 1975-12-13 1977-06-16 Kurt Friedrich Gleitschutzeinrichtung fuer fahrzeuge
DE2605505A1 (de) * 1976-02-12 1977-08-25 August Hoch Zusammengesetzte strassenstreuanlage
SU592645A1 (ru) * 1976-09-14 1978-02-15 Московский Ордена Ленина И Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта Устройство дл подачи песка под колеса локомотива
US4114932A (en) * 1977-07-05 1978-09-19 Fred Freeberg Motor vehicle wheel track sanding device

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832619A (en) * 1955-08-31 1958-04-29 Frank P Davis Traction unit
US2933337A (en) * 1956-09-19 1960-04-19 Katz David Anti-skid implement for automobiles
US3140887A (en) * 1961-06-09 1964-07-14 Whitehead Bros Co Method and apparatus for applying traction sand to locomotive driving wheels
US3336064A (en) * 1965-07-27 1967-08-15 Wiegand Co Edwin L Liquid anti-freeze dispensing traction increasing device
FR2085497A7 (fr) * 1970-04-27 1971-12-24 Dubuc Paul
GB1346840A (en) * 1970-11-10 1974-02-13 Bertin & Cie Apparatus for adhesion of a vehicle wheel to a road
DE2214313A1 (de) * 1972-03-24 1973-10-04 Daimler Benz Ag Vorrichtung zum erhoehen der reibung zwischen der fahrbahn und den raedern von fahrzeugen, insbesondere von kraftfahrzeugen
DE2330865A1 (de) * 1973-06-16 1975-01-16 Hermann Glaser Druckluft-streuvorrichtung kombiniert mit auspuffschalldaempfer fuer kfz
DE2556263A1 (de) * 1975-12-13 1977-06-16 Kurt Friedrich Gleitschutzeinrichtung fuer fahrzeuge
DE2605505A1 (de) * 1976-02-12 1977-08-25 August Hoch Zusammengesetzte strassenstreuanlage
SU592645A1 (ru) * 1976-09-14 1978-02-15 Московский Ордена Ленина И Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта Устройство дл подачи песка под колеса локомотива
US4114932A (en) * 1977-07-05 1978-09-19 Fred Freeberg Motor vehicle wheel track sanding device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5580106A (en) * 1995-07-24 1996-12-03 Dulberg; Joel H. Traction device

Also Published As

Publication number Publication date
FR2443937A1 (fr) 1980-07-11
SE7812910L (sv) 1980-06-16
FR2443937B3 (fr) 1981-10-16
FI793896A (fi) 1980-06-16
NO794074L (no) 1980-06-17
SE8005708L (sv) 1980-08-13

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