• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE1050255A1
    申请号:SE1050255
    申请日:2010-03-18
    公开日:2011-09-19
    发明作者:Rune Svensson；Goeran Valfridsson
    申请人:Bt Products Ab；
    IPC主号:
    专利说明:

    15 20 25 30 the tires support, an electrical line from the vehicle's chassis to the ground has been provided.
    SUMMARY OF THE INVENTION When a truck is driven on conventional truck wheels, the truck chassis is often statically charged to a voltage exceeding 10 kV, for example to about 14 kV.
    Experiments have shown that the charge is greatest when the truck wheels are new, and that the size of the charge also varies with surrounding conditions such as wheel load, type of surface and humidity. High charge occurs, for example, when driving on concrete floors with an electrically insulating plastic coating, such as an epoxy coating. Furthermore, charging decreases with increasing humidity, and increases with increasing wheel load.
    Charging above about 8-10 kV is undesirable as it can lead to sparks, discomfort, component damage and malfunctions.
    The guide wheels described in DE19858825 C2 have the disadvantages that compared to conventional truck wheels they are relatively expensive, offer poorer bearing capacity and can have a shorter service life.
    The object of the present invention is to reduce in a cost-effective manner the static electric charge which can occur in a truck's chassis, without deteriorating the performance of the truck.
    The object has been achieved by providing a solid tread for a truck wheel or a truck roll, where at least one of the side surfaces of the tread has an electrically conductive coating which reduces the generation of static electric charge in the tread. The tread has the shape of a cylinder and its side surfaces are defined as the two circular ends of the cylinders.
    The invention limits the static electric charge of a truck's chassis, which truck's wheels are provided with the treads according to the invention, to approximately 2.5-5 kV. A charge in this area does not give rise to any of the problems mentioned above.
    The electrically conductive coating on the side surface of the tread inhibits the occurrence of static electric charge. Thus, the invention has a desirable effect even when driving on electrically insulating surfaces, for example plastic such as epoxy. Other advantages are that the tread only entails a marginal cost increase and does not affect the driving characteristics or bearing capacity. The effect of the invention is furthermore predictable since it is essentially not affected by varying humidity. In addition, the invention can be applied to existing conventional truck wheels by applying the coating.
    The invention has the best effect if the coating covers the entire side surface of the tread. However, the invention works satisfactorily even if the coating does not cover the entire side surface, which may be the case, for example, after the wear that occurs after a period of use.
    The coating can be applied so that it covers the entire side surface of the tread and also overlaps, and thereby electrically contacts, the rim on which the tread sits. Furthermore, the coating can extend around the edge of the side surface to the outside of the tread, i.e. the side facing the substrate. Correspondingly, the coating can be applied to the inside of the tread, ie the side facing the rim.
    A simple and cost-effective way to provide the tread with the electrically conductive coating is to coat both the side surface of the tread and the side surface of the rim 10 with the coating. This also achieves good electrical contact between the tread and the rim.
    The invention works best if both side surfaces of the tread are coated with the electrically conductive coating. However, the effect of the invention can also be achieved by coating on only one of the side surfaces, which simplifies the production of the tread since only one side surface must be treated.
    If the electrically conductive coating is of a color that deviates significantly from the color of the tread, it can be easily determined visually that the truck equipped with the tread is not strongly statically electrically charged. This is advantageous in areas to which only low-charge vehicles have access. In addition, the deviating color serves as a clear marking when handling the wheels before mounting on a truck.
    The tread can be made of polyurethane, which means good bearing capacity and good driving properties. However, the effect of the invention can in principle also be achieved with a tread of other materials, for example rubber.
    The object of the invention has further been achieved by means of a truck wheel or a truck roller having said tread, and by a truck with such a truck wheel or a truck roller. The invention works best if all the wheels and / or rollers of the truck are of the type according to the invention.
    The object of the invention has finally been achieved by providing a method for reducing the generation of static electric charge of a truck wheel or a truck roll under load in connection with driving a truck carried by the truck wheel or truck roll. The method comprises the step of coating at least one side surface of the solid tread of the truck wheel or truck roller with an electrically conductive coating. Thus, the invention can be applied to existing wheels. DESCRIPTION OF THE FIGURES The figures illustrate an embodiment of the present invention. Here, Figure 1 shows a plan view and a side view of a truck wheel with a tread according to the present invention, Figure 2 shows side views of further embodiments of the present invention, and Figure 3 shows a comparison between static charging using standard wheels and wheels according to the present invention on different basis.
    DESCRIPTION OF EMBODIMENTS Figure 1 schematically shows a truck wheel 10 or a truck roll 10. The difference between a truck wheel and a truck roll is mainly that a truck wheel is larger and designed to carry a larger load. A truck wheel often acts as a drive and steering wheel, while a truck roller often acts as a support leg wheel. In the continued description, only truck wheels are discussed, however, the invention works in the same way in connection with truck rollers.
    To the left of Figure 1, the truck wheel 10 is shown in plan view. The truck wheel 10 has a rim 15 on which a tread 20 is mounted. To the right in figure 1, the same wheel 10 is shown seen in the direction of travel. The annular tread 20 of the wheel 10 has a first side surface 20a and a second side surface 20b. A first coating 30a is applied to the first side surface 20a of the tread. The first coating 30a covers the entire first side surface 20a of the entire first tread. The same applies to the second side surface 20b of the tread, where a second coating 30b has been applied.
    Figure 2 shows different variants in terms of the coating of the tread 20 and the rim 15, seen in the direction of travel. At the far left in Figure 2, a wheel 10 with different coatings is illustrated on the first side surface 20a and second side surface 20b of the tread 20, respectively. The first coating 30a covers the entire first side surface 20a of the tread and also overlaps the rim 15. The second coating 30b covers the entire second side surface 20b of the tread and also the entire rim 15.
    In the middle of figure 2 a wheel 10 is illustrated which is only coated on one side surface.
    The coating 30a extends over the entire first side surface 20a of the tread and around the peripheral outer edge of the side surface 20a to the outside 20c of the tread, i.e. the side facing the substrate.
    The embodiments on the left and in the middle of Figure 2 illustrate that different coatings can be used on the different sides of the tread and / or rim.
    To the right of Figure 2, a further alternative for the coating 30a, 30b is illustrated. Here again, as in Figure 1, the same coating is used on the first and second side surfaces of the tread 20. The coatings 30a, 30b extend over the entire side surfaces of the tread and around its peripheral outer edges to the outside 20c of the tread. The coatings 30a, 30b are further applied to the inside 20d of the tread, i.e. the side facing the rim 15.
    In summary, Figures 1 and 2 illustrate several alternatives regarding the extent of the coating on the wheel. The coating can only be applied to the tread, or to the tread and the rim. The coating can be of the same type on both sides, or different between the sides.
    In the figures, the thickness of the coating is exaggerated in order to clarify the invention.
    As already described, the static electric charge to which a truck is subjected varies depending on the surface on which the truck is running. Figure 3 illustrates the charging when driving on different surfaces A-D. Figure 3 shows the results of actual measurements, where all three wheels 10 of a truck 10 have carried treads with an electrically conductive coating 30a, 30b on both sides 20a, 20b of the treads, see figure 1. In each case AD a dashed bar and a non-dashed bar. The dashed bars refer to the charge that arises when using wheels 10 according to the present invention, while the other bars refer to ordinary wheels. As can be seen, the wheels according to the present invention have a favorable effect on each surface A-D.
    In more detail, bars A refer to the static electric charge that occurs when driving on a first surface. Here, the wheels according to the invention mean that the charge is reduced by about 55%. The bars B refer to results measured when driving on a second surface, where the charge has been reduced by about 75%. C refers to driving on a third surface and a reduction of about 90% has been demonstrated. Finally, bars D refer to driving on a fourth surface and show a reduction of approx. 70%.
    In summary, the wheels according to the invention mean that the static electric charge is reduced by 55-90% compared with conventional truck wheels.
    As mentioned, charging above about 8-10 kV is undesirable. Figure 3 shows that cases B, C and D involve recharging in this area if conventional truck wheels are used. In all cases, however, the use of the wheels according to the invention has reduced the charging to an acceptable level.
    The invention involves coating a tread with an electrically conductive coating. The coating can be, for example, Graphite 33 from Kontakt Chemie. According to the method of the invention, the coating can, for example, be sprayed or brushed on the tread, or on the tread and the rim supporting the tread. In this case, the coating can, according to the embodiments above, be applied to one or both side surfaces of the tread. The method may also include coating the inside and / or outside of the tread.
    权利要求:
    Claims (1)
    [1]
    A solid tread (20) for truck wheels (10) or truck roller (10), characterized in that at least one of the side surfaces (20a, 20b) of the tread (20) has an electrically conductive coating (30a, 30b). ), which coating (30a, 30b) reduces the generation of static electric charge in the tread (20). Solid tread (20) according to claim 1, wherein the coating (30a, 30b) covers substantially the entire side surface (20a, 20b). Solid tread (20) according to claim 1 or 2, wherein only one of the side surfaces (20a) of the tread (20) has an electrically conductive coating (30a) _ _ Solid tread (20) according to claim 1 or 2, wherein the tread (20) both side surfaces (20a, 20b) have an electrically conductive coating (30a, 30b). Solid tread (20) according to any one of the preceding claims, wherein the coating (30a, 30b) is of a color which differs markedly from the color of the tread (20). Solid tread (20) according to one of the preceding claims, wherein the coating (30a, 30b) partially covers the outside of the tread (20), i.e. the side facing the ground. Truck wheel (10) or truck roller (10), comprising a tread (20) according to any one of the preceding claims 1-6. A truck comprising a truck wheel (10) or a truck roller (10) according to claim 7. _ A truck according to claim 8, wherein all the wheels of the truck are truck wheels (10) or truck rollers (10) according to claim 7. 10. Method for reducing generation of static electric charge of a truck wheel (10) or a truck roll (10) under load in connection with the driving of a truck carried by the truck wheel (10) or the truck roll (10), which method comprises the step of coating at least one side (20a, 20b) of the solid tread (20) of the truck wheel (10) or the truck roller (10) with an electrically conductive coating (30a, 30b).
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    同族专利:
    公开号 | 公开日
    WO2011115564A1|2011-09-22|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB544757A|1940-02-15|1942-04-27|Us Rubber Co|Improvements in a pneumatic tyre and method of making same|
    DE1993828U|1968-07-02|1968-09-12|Continental Gummi Werke Ag|FULL TIRES FOR VEHICLES OD. DGL.|
    JPH0374202A|1989-08-15|1991-03-28|Aichi Tire Kogyo Kk|Static electricity neutralizing tire|
    EP0819741A3|1996-07-16|1998-10-21|Bridgestone Corporation|Electrically conductive rubber cement and pneumatic tire using the same|
    DE19858825C2|1998-12-19|2002-07-18|Raeder Vogel Raeder Und Rollen|Method for producing an electrically conductive tread of a wheel or a roller and electrically conductive tread of a wheel or a roller|
    US8006844B2|2007-09-21|2011-08-30|Ivex Protective Packaging, Inc.|Packaging system for producing a foam-in-bag and method of mixing foam|
    JP5259337B2|2007-11-19|2013-08-07|東洋ゴム工業株式会社|Pneumatic tire|EP3750699A1|2016-06-30|2020-12-16|Artic Investments S.A.|Tire and method for making a tire|
    DE102016212509A1|2016-07-08|2018-01-11|Continental Reifen Deutschland Gmbh|vehicle tires|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1050255A|SE534673C2|2010-03-18|2010-03-18|Tread and method for reduced static electricity generation, as well as truck and truck wheels|SE1050255A| SE534673C2|2010-03-18|2010-03-18|Tread and method for reduced static electricity generation, as well as truck and truck wheels|
    PCT/SE2011/050292| WO2011115564A1|2010-03-18|2011-03-17|Insdustrial truck|
    EP20110715776| EP2547538A1|2010-03-18|2011-03-17|Industrial truck|
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