WO2009104734A1 - Appareil d'essai de roulement de pneu - Google Patents

Appareil d'essai de roulement de pneu Download PDF

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Publication number
WO2009104734A1
WO2009104734A1 PCT/JP2009/053024 JP2009053024W WO2009104734A1 WO 2009104734 A1 WO2009104734 A1 WO 2009104734A1 JP 2009053024 W JP2009053024 W JP 2009053024W WO 2009104734 A1 WO2009104734 A1 WO 2009104734A1
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WO
WIPO (PCT)
Prior art keywords
tire
support
liquid
upstream
belt
Prior art date
Application number
PCT/JP2009/053024
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English (en)
Japanese (ja)
Inventor
徹 岡田
将雄 村上
Original Assignee
株式会社神戸製鋼所
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 株式会社神戸製鋼所 filed Critical 株式会社神戸製鋼所
Publication of WO2009104734A1 publication Critical patent/WO2009104734A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • G01M17/02—Tyres
    • G01M17/022—Tyres the tyre co-operating with rotatable rolls

Definitions

  • the present invention relates to a tire running test apparatus using a running belt that simulates a road surface.
  • a tire running test apparatus for evaluating the running characteristics of a tire
  • an apparatus using an endless flat belt (hereinafter referred to as a belt) simulating a flat road surface is known.
  • a belt is stretched between two drums, and a flat surface, which is the upper surface of the belt located between the two drums, is used as a surface for grounding the tire.
  • a load supporting device On the back side (the lower surface of the belt) of the test road surface, a load supporting device that prevents the belt from bending and supports the tire load is provided.
  • the load support device supplies a support liquid such as pressurized water or oil between the lower surface of the belt and the upper surface (belt support surface) of the load support device. It is configured. That is, the load support device has a function of supporting the belt in a state where the belt is floated above the belt support surface by supplying the support liquid to the belt support surface.
  • a support liquid such as pressurized water or oil
  • Patent Documents 1 to 3 techniques for floating a belt above a belt support surface using a pressurized support liquid are disclosed in, for example, Patent Documents 1 to 3.
  • the upper surface of the support bed according to Patent Document 1 is provided with a plurality of long grooves extending in a direction (width direction) perpendicular to the belt traveling direction and arranged in the traveling direction.
  • the support bed is provided with water supply holes for injecting water to the center of each long groove. Since the support bed is provided with a long groove, water can be supplied to the entire width direction of the belt with a small amount of water supply.
  • a wedge-shaped gap is formed between the belt and the upper surface of the support bed. Due to the wedge effect of the water flowing from the upstream side into the wedge-shaped gap, dynamic pressure is generated in the water, and the belt is supported on the water layer.
  • the load supporting device includes a plurality of concave pockets that are spaced apart in the belt running direction and spaced apart in the width direction, and liquid supply holes that supply water to the pockets. ing.
  • the pocket is a recess having a rectangular shape in a plan view and a side cross section in a direction orthogonal to the belt traveling direction having an arc shape.
  • the pocket is a groove that is short in the width direction.
  • the weighted support device uses a static pressure and dynamic pressure of water to float and support the belt. That is, since a plurality of pockets are independently provided in the width direction and the running direction, high pressure water does not escape, the tire supporting force by static pressure can be secured, and it can withstand a large tire load. It is supposed to be. On the other hand, when the belt travel speed increases and reaches a speed range where stress due to water shearing occurs, the water supply amount is reduced so as to reduce the water supply pressure.
  • examples of the shape of the supply hole include a circular pocket in a plan view as shown in Patent Document 3.
  • the present invention has been made in view of the above-described problems, and an object thereof is to provide a tire running test apparatus that is compact and suitable for supporting a tire by a dynamic pressure method.
  • the present invention provides a tire running test apparatus for testing a tire, wherein the endless belt is circulated between two horizontally arranged drums, and each of the drums.
  • a load support device for supporting the test portion of the belt located above among the belts positioned between, and the load support device includes a support portion provided below the test portion;
  • an upstream long groove that extends in a direction that includes a component in a direction parallel to the flow direction of the belt and that is supplied with liquid from the liquid supply unit, and the upstream long groove includes the test portion and the tire.
  • the support part including the contact position of It is provided in the tire upstream portion located upstream of the tire contact portion that is a partial range in the flow direction, and the support surface is provided in a boundary portion between the tire contact portion and the tire upstream portion.
  • the present invention it is possible to supply a liquid suitable for tire support by the dynamic pressure method, while the liquid supply portion is compact. Therefore, in the tire running test apparatus, the running test of the tire can be reliably performed while reducing the wear of the support portion and / or the belt.
  • FIG. 1 is a side view showing the overall configuration of the tire running test apparatus according to the first embodiment of the present invention.
  • FIG. 2 is an enlarged plan view showing the support portion of FIG. 3 is a cross-sectional view taken along line III-III in FIG.
  • FIG. 4 is a plan view of a tire running test apparatus according to the second embodiment of the present invention.
  • 5 is a cross-sectional view taken along line VV in FIG.
  • FIG. 6 is a plan view of a tire running test apparatus according to the third embodiment of the present invention.
  • FIG. 7 is a plan view showing a tire testing apparatus according to the fourth embodiment of the present invention.
  • FIG. 8 is a plan view showing a tire running test apparatus according to the fifth embodiment of the present invention.
  • FIG. 1 is a side view showing an overall configuration of a tire running test apparatus 1 according to the first embodiment of the present invention.
  • the tire running test apparatus 1 includes a spindle shaft 3 on which a tire 2 is mounted, a drive drum 4 that is rotatable forward and backward, and a follower provided at a distance from the drive drum 4.
  • a drum 5 and an endless metal plate traveling belt (hereinafter referred to as a belt 6) bridged between the driving drum 4 and the driven drum 5 are included.
  • the axes of the driving drum 4 and the driven drum 5 are arranged so as to be parallel to each other on the same horizontal plane.
  • the drive drum 4 and the driven drum 5 have the same diameter dimension.
  • a part of the belt 6 positioned up and down between the driving drum 4 and the driven drum 5 has two flat surfaces arranged substantially horizontally.
  • the back surface of the belt 6 corresponding to the test road surface is supported by a load support device 7.
  • the load support device 7 supports the belt 6 to which a tire load is applied.
  • the load support device 7 includes a support portion 10 provided below the belt 6 and a liquid supply portion 22 that injects a support liquid such as water or oil pressurized between the support portion 10 and the belt 6 (see FIG. 3).
  • the upper surface of the support portion 10 (hereinafter also referred to as a tire support surface 11 (see FIG. 2)) is a plane that is substantially parallel to the lower surface of the belt 6.
  • the belt 6 runs.
  • FIG. 2 is an enlarged plan view showing the support portion 10 of FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2 and 3, the belt 6 travels from the left (upstream side) to the right (downstream side).
  • the length W1 of the tire support surface 11 in the direction (hereinafter referred to as the width direction) orthogonal to the belt running direction and the vertical direction is slightly larger than the width W2 of the belt 6. .
  • the support liquid supplied from the liquid supply unit 22 is sprayed from the tire support surface 11 to the back surface of the belt 6. Due to the static pressure and dynamic pressure of the support liquid, the belt 6 is lifted above the support portion 10 and contact between the belt 6 and the tire support surface 11 is prevented.
  • the range indicated by the one-dot broken line in FIG. 2 is a position where the tire 2 contacts the belt 6 during the tire running test, and is a tire contact area (contact position) e where the load of the tire 2 is applied.
  • a portion indicated by E in FIG. 2 is a tire contact portion E set in the support portion 10 as a range corresponding to the tire contact region e in the traveling direction of the belt 6.
  • the specific width and length of the tire contact area e vary depending on conditions such as the size of the tire 2 to be tested and the contact load, the diameter and maximum of the maximum tire 2 that can be tested It can be determined in advance from the load.
  • the tire contact area e is calculated from the maximum tire diameter, the maximum load, the maximum slip angle, and the maximum camber angle, and a length range 0.8 to 1.2 times the tire contact area e is “tire contact portion E”. It can be.
  • the center position of the tire contact portion E may be positioned directly below the spindle shaft 3 that holds the tire 2.
  • a range upstream of the tire contact portion E in the belt traveling direction is a tire upstream portion U
  • a range downstream of the tire contact portion E is a tire downstream portion D.
  • the support portion 10 is provided side by side in the width direction at five upstream long grooves 12 provided side by side in the width direction at a position upstream of the tire contact region e, and at a position downstream of the tire contact region e.
  • the five downstream long grooves 40 are provided.
  • the upstream long groove 12 is recessed from the tire support surface 11 and extends in a direction including a component in a direction parallel to the traveling direction of the belt 6 (in this embodiment, a direction parallel to the traveling direction of the belt 6). Yes.
  • the upstream long groove 12 is supplied with liquid from the liquid supply section 22.
  • a support surface (a part of the tire support surface 11) 39 adjacent to the end of the upstream long groove 12 on the downstream side in the running direction of the belt 6 and higher than the bottom surface of the upstream long groove 12 is tire contact. It arrange
  • the downstream long groove 40 is recessed from the tire support surface 11 and is formed to extend in a direction parallel to the running direction of the belt 6.
  • the downstream long groove 40 is supplied with liquid from the liquid supply unit 22.
  • the support surface 41 that is adjacent to the downstream side in the running direction of the belt 6 with respect to the end of the downstream long groove 40 and is higher than the bottom surface of the upstream long groove 12 is disposed downstream of the tire contact region e. ing.
  • the upstream long groove 12 and the downstream long groove 40 may be collectively referred to as long grooves 12 and 40.
  • three long grooves 12 and 40 are provided within the range of the tire contact region e in the width direction and one long groove 12 and 40 are provided on both sides in the width direction of the tire contact region e (both outside the tire contact region e). Yes.
  • the support surface 39 is provided between the upstream long groove 12 and the tire contact area e. That is, the upstream long groove 12 is formed extending in the belt traveling direction in the tire upstream portion U, but does not reach the tire contact region e. In the present embodiment, the support surface 39 is formed over a range from the tire contact region e to the upstream long groove 12, but in the vicinity of the tire contact region e (for example, the boundary between the tire upstream portion U and the tire contact portion E). May be formed only at a position in the vicinity (about 5 mm).
  • the support surface 41 is provided between the downstream long groove 40 and the tire contact region e. That is, the downstream long groove 40 is formed in the tire downstream portion D so as to extend in the belt traveling direction, but does not reach the tire contact region e.
  • the tire contact portion E is not formed with a long groove, and the support liquid is not directly supplied to the tire contact portion E.
  • downstream long groove 40 is provided, but this downstream long groove 40 is not used when the belt 6 runs from the left to the right in FIGS. 2 and 3 as described above. When the belt 6 is run in the opposite direction, it plays the role of the upstream long groove 12.
  • each long groove 12 and 40 is provided with a liquid supply hole 13 for supplying a support liquid to the long groove 12 and 40, respectively.
  • Four liquid supply holes 13 are provided along the longitudinal direction of the belt for each of the long grooves 12 and 40.
  • the support liquid supplied from the liquid supply unit 22 is guided into the long grooves 12 and 40 through the liquid supply holes 13 and supplied to the back surface of the belt 6.
  • a plurality of liquid supply passages 14 extending in the width direction are provided inside the support portion 10 so as to straddle the long grooves 12 and the long grooves 40 below the long grooves 12 and 40.
  • the liquid supply path 14 extends in the width direction so as to allow the liquid supply holes 13 communicating with the long grooves 12 and 40 to communicate with each other, and includes four corresponding to the upstream long grooves 12 and four corresponding to the downstream long grooves 40. Is provided.
  • One end side of the liquid supply path 14 can receive the supporting liquid from the liquid supply section 22, and the other end side of the liquid supply path 14 is closed.
  • a liquid supply branch 15 that extends upward from a middle portion of the liquid supply path 14 and communicates with the long grooves 12 and 40 is formed in the support portion 10.
  • the open end of the liquid supply branch 15 is the liquid supply hole 13 described above.
  • the support portion 10 includes a drainage chamber 17 formed inside the support portion 10, a condensate groove 16 for returning the support liquid on the tire support surface 11 to the drainage chamber 17, and the inside of the drainage chamber 17. And a discharge hole 18 for discharging the support liquid.
  • the condensate groove 16 is a recessed groove that is formed in the vicinity of the periphery of the tire support surface 11 so as to surround the long grooves 12 and 40 in a plan view and opens upward.
  • the condensate groove 16 communicates with the drainage chamber 17, and the support liquid in the drainage chamber 17 is returned to a tank 19 described later via the discharge hole 18.
  • a draining seal 20 is provided in an annular shape between the peripheral portion of the tire support surface 11 and the condensate groove 16 in plan view.
  • the draining seal 20 is for preventing the supporting liquid from leaking out of the load supporting device 7.
  • the thickness dimension of the draining seal 20 is set to such a dimension that the draining seal 20 and the back surface of the belt 6 are in sliding contact so as to suppress the leakage of the supporting liquid during the tire running test.
  • the liquid supply unit 22 includes a supply amount of the support liquid to the tire upstream portion U and a supply amount of the support liquid to the tire downstream portion D according to the traveling speed of the belt 6, the traveling direction, and the contact position of the tire 2 with the belt 6. Can be adjusted individually.
  • the liquid supply unit 22 includes a tank 19 that stores the support liquid before pressurization, one pump 23 that pressurizes the support liquid in the tank 19, a motor 24 that drives the pump 23, It has an introduction path 25 that guides the support liquid pressurized by the pump 23 to the liquid supply path 14, and a switching valve 26 provided in the introduction path 25.
  • the introduction path 25 includes eight introduction paths 25a to 25h connected to the liquid supply paths 14, respectively.
  • the switching valve 26 is composed of an electromagnetic valve or the like, and includes a switching position for connecting the upstream introduction path 27 having the introduction paths 25a to 25d and the pump 23, and a downstream introduction path 29 having the introduction paths 25e to 25h. It is configured to be switchable between a switching position where the pump 23 is connected. By operating the switching valve 26, the support liquid can be supplied to the long grooves 12, 40, or the supply of the support liquid to the long grooves 12, 40 can be stopped.
  • the support liquid pressurized by the pump 23 is introduced into each liquid supply path 14 through the switching valve 26 and the upstream introduction path 27.
  • the support liquid introduced into the liquid supply path 14 is sprayed onto the tire support surface 11 from the liquid supply hole 13 through the liquid supply branch pipe 15.
  • the support liquid sprayed from the liquid supply hole 13 flows through the gap between the belt 6 and the tire support surface 11, is blocked by the draining seal 20, and returns to the tank 19 through the condensate groove 16.
  • the tire 2 is first mounted on the rim of the spindle shaft 3.
  • the tire 2 mounted on the spindle shaft 3 is pressed against the upper surface of the belt 6 moving on the upper portion of the load support device 7 to apply a predetermined load.
  • the length of the tire contact portion E is calculated in advance by the above-described method.
  • the support liquid is supplied via the upstream introduction path 27 and the long groove 12, so that the belt 6 is lifted upward from the tire upstream portion U and the belt 6 is in contact with the tire support surface 11. Will move.
  • the support liquid supplied to the upstream long groove 12 flows downstream in the upstream long groove 12 as the belt 6 moves, the support liquid can be effectively supplied to the tire contact region e.
  • a support surface 39 is formed between the tire contact region e and the upstream long groove 12, a wedge-shaped gap is formed between the belt 6 and the upper surface of the support portion 10 by the support surface 39. It is formed. Then, when the support liquid enters the wedge-shaped gap, a dynamic pressure effect of the support liquid is generated, and the belt 6 (tire 2) can be lifted.
  • the tire 2 due to the dynamic pressure effect is provided. Can be reliably supported.
  • the tire 2 can be supported with a small amount of the supporting liquid, so that the liquid supply section 22 can be reduced in size.
  • the support liquid is not supplied to the tire downstream portion D.
  • the tire downstream portion D is used as the tire upstream portion U. Will function. Therefore, in this case, the downstream side introduction path 29 is considered as the upstream side introduction path, and the same effect as described above can be obtained by supplying the support liquid to the tire downstream portion D described above.
  • the condition of liquid supply at the time of tire reversal is preferably the same as that at the time of normal tire rotation.
  • FIG. 4 is a plan view of a tire running test apparatus according to the second embodiment of the present invention.
  • 5 is a cross-sectional view taken along line VV in FIG.
  • the center long groove 42 is formed in the aspect of the long grooves 12 and 40 formed in the upstream and downstream of the tire contact area e, and the tire contact area e.
  • the point and the configuration of the liquid supply unit 22 are different from those of the first embodiment. Other points are substantially the same as in the first embodiment.
  • the lateral grooves 37a and 37b are provided.
  • the tire contact portion E is provided with a total of four lateral grooves 37a, two at each outer position in the width direction of the tire contact region e.
  • a total of four lateral grooves 37b are provided, two at each outer position in the width direction of the tire contact region e.
  • Each of the lateral grooves 37 a and 37 b is provided with one liquid supply hole 13, and the support liquid is supplied from the liquid supply part 22 through the liquid supply hole 13. That is, in the present embodiment, there are 24 liquid supply holes 13 of the three long grooves 12 and 40 within the range of the tire contact area e in the width direction, whereas both of the tire contact areas e in the width direction are present. There are eight liquid supply holes 13 in each of the lateral grooves 37a and 37b within the outer range. As described above, in the present embodiment, by disposing more liquid supply holes 13 in the range of the tire contact region e in the width direction than outside the same range, the region in the tire contact region e is the same. More support liquid is supplied than outside the range.
  • the position of the lateral groove 37a in the running direction of the belt 6 is a position corresponding to the most upstream liquid supply hole 13 and the most downstream liquid supply hole 13 formed in the long groove 12, respectively. Further, the position of the lateral groove 37b in the traveling direction is a position corresponding to the most upstream liquid supply hole 13 and the most downstream liquid supply hole 13 formed in the long groove 40, respectively.
  • the support liquid By supplying the support liquid through the lateral groove 37a, the support liquid can be supplied evenly in the width direction. Therefore, by reducing the frictional resistance between the belt 6 and the tire support surface 11, the belt 6 and / or the tire support is reduced. It becomes possible to suppress wear of the surface 11.
  • the central long groove 42 is provided within the tire contact area e.
  • Each central long groove 42 is disposed at the same position in the width direction as each long groove 12, 40, but the support surfaces 39, 41 are provided between each central long groove 42 and the long grooves 12, 40, respectively.
  • the central long groove 42 and the long grooves 12 and 40 are divided by the support surfaces 39 and 41. That is, the upstream and downstream edges of the tire contact region e are portions where the central long groove 42 is not formed (support surfaces 39 and 41).
  • liquid supply holes 13 are formed in the traveling direction of the belt 6 at the bottom of each central long groove 42.
  • a liquid supply path 14 for communicating the liquid supply holes 13 positioned on the upstream side in the running direction of the belt 6 and a liquid supply path 14 for communicating the liquid supply holes 13 positioned on the downstream side. are provided along the width direction.
  • the support liquid is supplied to the two liquid supply paths 14 by the liquid supply unit 22.
  • the liquid supply unit 22 further includes an introduction path 25 i and an introduction path 25 j connected to the two liquid supply paths 14. Further, since the liquid supply unit 22 according to the present embodiment includes the switching valves 43 provided in the respective introduction paths 25a to 25j, the supply amount of the support liquid to each of the introduction paths 25a to 25j is individually adjusted. can do. Therefore, in this embodiment, it is possible to individually adjust the supply amount of the supporting liquid to each of the tire upstream portion U, the tire contact portion E, and the tire downstream portion D by operating each switching valve 43 individually. Become.
  • the introduction passages 25a to 25d located in the tire upstream portion U are referred to as “upstream introduction passages 27”, and the switching valve 43 connected to the upstream introduction passage 27 is opened and closed to thereby open the tire upstream portion U.
  • the supply amount of the support liquid can be adjusted independently.
  • the introduction passages 25i and 25j located in the tire contact portion E are referred to as “contact introduction passages 28”, and the switching valve 43 connected to the contact introduction passage 28 is opened and closed to supply the support liquid to the tire contact portion E.
  • the amount can be adjusted independently.
  • introduction passages 25e to 25h located in the tire downstream portion D are regarded as the “downstream introduction passage 29”, and the switching valve 43 connected to the downstream introduction passage 29 is opened and closed to support the tire downstream portion D.
  • the supply amount of the liquid can be adjusted independently.
  • the supporting liquid can be directly supplied to the tire contact portion E through the central long groove 42, the tire 2 can be supported by static pressure.
  • the central long groove 42 extending in the direction parallel to the traveling direction of the belt 6 has been described.
  • the extending direction is not necessarily limited to the direction parallel to the traveling direction, and is parallel to the traveling direction. What is necessary is just to extend in the direction containing the direction component. By doing so, it is possible to positively form a flow along the traveling direction of the belt 6 even in the tire contact region e, and it is possible to more effectively invite the liquid in the tire upstream portion U. Therefore, according to the embodiment, the ability to support the tire due to the dynamic pressure effect is also increased.
  • the supply amount of the supporting liquid to the tire upstream portion U, the tire contact portion E, and the tire downstream portion D can be independently changed as in the above-described embodiment. Since the supply amount of the support liquid can be reduced as compared with other portions, the supply amount of the support liquid can be reduced.
  • the belt 6 traveling on the load support device 7 can be reliably secured by ensuring the supply amount of the liquid to the tire contact portion E and the tire upstream portion U while reducing the supply amount of the support liquid to the entire load support device 7. Therefore, the running test of the tire 2 can be performed while suppressing the wear of the load support device 7 and the belt 6 as much as possible.
  • FIG. 6 is a plan view of a tire running test apparatus according to the third embodiment of the present invention.
  • a plurality of pockets 31 (supply holes) for supplying the support liquid are provided in the tire contact area e instead of the long groove 42 of the second embodiment (this In the embodiment, four) are formed.
  • Each pocket 31 is a recess formed in a circular shape in plan view and opened upward.
  • the liquid supply holes 13 are formed in the bottoms of the pockets 31, respectively.
  • the support portion 10 includes a liquid supply path 14 that communicates two liquid supply holes 13 that are located upstream of the liquid supply holes 13 of each pocket 31 in the running direction of the belt 6.
  • a liquid supply path 14 for communicating the two liquid supply holes 13 positioned on the downstream side is formed extending in the width direction. Since the pockets 31 are arranged at equal intervals in the running direction of the belt 6 and the width direction, the pockets 31 are arranged in a lattice shape in plan view.
  • the tire 2 can be supported and the belt 6 can be lifted by the dynamic pressure effect, but also the support liquid pressurized by the pump 23 can be supplied through the pocket 31.
  • the tire 2 and the belt 6 can be supported by a static pressure method.
  • FIG. 7 is a plan view showing a tire testing apparatus according to the fourth embodiment of the present invention.
  • a plurality of long grooves 12, 40 according to the first to third embodiments are equally spaced in the width direction on the support portion 10 (15 in FIG. 7). Book) is formed.
  • a plurality of long grooves 42 according to the second embodiment are formed on the support portion 10 at equal intervals in the width direction.
  • a support surface 39 is formed between the upstream long groove 12 and the central long groove 42, and the upstream long groove 12 and the central long groove 42 are divided by the support surface 39.
  • a support surface 41 is formed between the central long groove 42 and the downstream long groove 40, and the central long groove 42 and the downstream long groove 40 are divided by the support surface 41. That is, the long grooves 12, 40, 42 are arranged at the same position in the width direction, but are divided by the support surfaces 39, 41 and are not in communication.
  • a tire running test can be performed at any location on the tire support surface, and a plurality of tires The test can be performed with 2, 2,.
  • the liquid supply path 14 is individually connected to each of the long holes 12, 40, 42, and the introduction path 25 (see FIG. 5) communicating with the liquid supply path 14. If the switching valve 43 (see FIG. 5) is provided for each of these, it is possible to adjust the supply amount of the supporting liquid to each of the long holes 12, 40, 42. In this way, not only can the amount of support liquid supplied to the tire upstream portion U, the tire contact portion E, and the tire downstream portion D be individually adjusted, but also the support for the long holes 12, 40, 42 in the width direction. It becomes possible to individually adjust the supply amount of the liquid.
  • the supply amount of the support liquid on both outer sides in the width direction of the tire contact region e can be made smaller than the supply amount of the support liquid in the tire contact region e.
  • the supply amount of the support liquid can be reduced, and the liquid supply unit 22 can be downsized. can do.
  • FIG. 8 is a plan view showing a tire running test apparatus according to the fifth embodiment of the present invention.
  • long grooves 38 and 44 are formed on the support portion 10 instead of the long grooves 12 and 40 of the first embodiment. Specifically, four upstream long grooves 38 are formed at equal intervals in the traveling direction of the belt 6 in the tire upstream portion U, while four downstream long grooves 44 are formed in the traveling direction in the tire downstream portion D. Are formed at equal intervals.
  • the upstream long groove 38 is a groove extending in an oblique direction close to the tire contact area e toward the downstream side in the flow direction of the belt 6.
  • the upstream long groove 38 has an oblique groove 38 ⁇ / b> L extending from the position on the left side of the support portion 10 to the center position toward the downstream side in the running direction of the belt 6, and the right side of the center position.
  • It has an oblique groove 38 ⁇ / b> R extending from the position to the center position in the width direction of the support portion 10, and has an arrow shape indicating the downstream side in the traveling direction as a whole.
  • the oblique grooves 38L and 38R are formed to be inclined at an angle of about 45 degrees with respect to the center position in the width direction of the support portion 10, respectively.
  • liquid supply holes 13 are formed side by side in the running direction of the belt 6.
  • the four liquid supply holes 13 on the downstream side supply the support liquid into the upstream long groove 38 at the intersection of the oblique grooves 38 ⁇ / b> L and 38 ⁇ / b> R.
  • the liquid supply holes 13 are also communicated with the middle portions of the oblique grooves 38L and 38R.
  • a support surface 39 is formed between the upstream long groove 38 and the tire contact region e. That is, the upstream long groove 38 is formed to extend from the tire upstream portion U in the belt traveling direction, but does not reach the tire contact region e.
  • the support liquid When the support liquid is supplied to each of the upstream long grooves 38, the support liquid gathers along the oblique grooves 38L and 38R to the center portion in the width direction of the tire support surface 11, and this support liquid is stored in the tire contact region. e. As a result, the belt 6 can be lifted and the tire 2 can be supported by the dynamic pressure effect generated in the tire contact region e.
  • the downstream long groove 44 formed in the tire downstream portion D is axisymmetric with respect to a virtual line along the width direction passing through the center position of the tire contact region e. That is, the downstream long groove 44 is a groove extending in an oblique direction closer to the tire contact region e toward the upstream side in the traveling direction of the belt 6.
  • the downstream long groove 44 has an oblique groove 44 ⁇ / b> L extending from the position on the left side of the support portion 10 to the center position toward the downstream side in the running direction of the belt 6, and the position on the right side of the center position. It has an oblique groove 44 ⁇ / b> R extending from the position to the center position in the width direction of the support portion 10, and has an arrow shape indicating the upstream side in the traveling direction as a whole.
  • a support surface 41 is formed between the downstream long groove 44 and the tire contact region e. That is, the downstream long groove 44 extends from the tire downstream portion D in the direction opposite to the belt traveling direction, but does not reach the tire contact region e.
  • the downstream long groove 44 is not used when the belt 6 travels from left to right in FIG. 8 as described above, and serves as the upstream long groove 38 when the belt 6 travels in the opposite direction. It is.
  • the embodiment it is possible to concentrate the support liquid existing in the tire upstream portion U in the width direction and guide it to the tire contact region e. Accordingly, more support liquid can be collected in the tire contact region e and a straight flow can be effectively generated in the tire contact region e, so that the ability of tire support by the dynamic pressure effect can be further improved. it can.
  • the tire running test apparatus according to the present invention described above is not limited to the embodiment described above.
  • the present invention is a tire running test apparatus for testing tires, comprising an endless belt circulated around two drums arranged in a horizontal direction and a belt positioned between the drums.
  • a liquid supply part for supplying a liquid between the test part and the support part provided at a position opposite to the test part and including a component in a direction parallel to the flow direction of the belt An upstream long groove that extends to the end of the upstream long groove, and a support surface that is adjacent to the downstream side in the flow direction and is higher than the bottom surface of the upstream long groove. Supplying liquid to the upstream long groove Configured urchin, the supporting surface provides a tire running test apparatus characterized by being arranged on the upstream side of the contact position between the tire and the test section in the flow direction.
  • the upstream long groove to which the liquid is supplied from the liquid supply part is formed to extend in a direction including a component parallel to the flow direction of the belt, and is higher than the bottom surface of the upstream long groove Since the support surface is formed on the upstream side of the contact position between the tire and the test portion, the supply amount of the liquid for supporting the tire can be reduced by the dynamic pressure method, and the load support device Can be made compact. The reason is as follows.
  • the liquid pressure at the contact position between the tire and the test part is the highest, whereas the liquid pressure around the contact position depends on the flexibility of the belt itself. Due to the gap between the belt and the support portion extending up and down, it is not so high. Therefore, if there is a groove connecting the contact position and the periphery of the contact position, the pressure at the contact position escapes around the contact position, and as a result, the pressure at the contact position decreases and the load that can be supported by static pressure decreases. Inconvenience such as occurs.
  • the upstream long groove to which the liquid is supplied is formed in the upstream portion of the contact position between the tire and the test portion, so that the liquid flow (straight forward flow) along the belt flow direction can be achieved. Since it can increase, a liquid can be effectively supplied with respect to a contact position. Therefore, according to the present invention, the floating of the belt by the dynamic pressure method at the contact position, that is, the tire can be reliably supported with a small amount of liquid.
  • the support surface adjacent to the downstream side in the flow direction with respect to the end portion of the upstream long groove is formed on the upstream side of the contact position, so that the belt (test portion) and the support portion are Since a wedge-shaped gap is formed in between, the liquid enters the wedge-shaped gap, and the dynamic pressure effect of the liquid is generated, and the floating of the belt, that is, the dynamic pressure for supporting the tire is surely generated. To do.
  • dynamic pressure means a pressure generated when a belt travels in a predetermined system and liquid in a gap flows, and “static pressure” generated by the liquid supplied into the system. It is a word used correspondingly.
  • Dynamic pressure is an apparent pressure that does not actually act as a load, and corresponds to “static pressure” when the flow is blocked. More specifically, the “dynamic pressure” can be expressed by 1 ⁇ 2 ⁇ ⁇ v 2 and is proportional to the liquid density ⁇ and proportional to the square of the flow velocity v.
  • the load support device can be further reduced in size by not providing the liquid supply portion in the downstream portion.
  • the support surface is preferably located in the vicinity of a contact position between the tire and the test portion in the flow direction.
  • the position in the vicinity of the contact position is a distance at which the liquid pressure at the contact position does not escape to the upstream side of the contact position through the upstream long groove.
  • the support portion is provided at a position facing the test portion at a contact position between the tire and the test portion and extends in a direction including a component in a direction parallel to the flow direction.
  • the liquid supply unit is configured to supply liquid to the central long groove, and the support surface is interposed between the central long groove and the upstream long groove.
  • the tire can be supported by static pressure.
  • the central long groove extends in a direction including a component in a direction parallel to the flow direction, it is possible to positively form a flow along the flow direction of the belt even at the contact position.
  • the liquid at the upstream position can be introduced more effectively. Therefore, according to the said structure, the capability of the tire support by dynamic pressure also rises.
  • the support part further includes a supply hole provided at a position facing the test part at a contact position between the tire and the test part, and the liquid supply part passes through the supply hole. It is preferable that the liquid can be discharged between the test portion and the support portion.
  • the upstream long groove is inclined in the width direction perpendicular to the flow direction and the vertical direction and closer to the contact position between the test portion and the tire as it goes downstream in the flow direction. It is preferable that the groove extends in the direction.
  • the support portion includes a tire contact portion that is a partial range in the flow direction including a contact position between the tire and the test portion, and a tire positioned upstream of the tire contact portion.
  • An upstream portion, and a tire downstream portion located downstream of the tire contact portion, and the liquid supply portion has independent liquid supply amounts for the tire upstream portion, the tire contact portion, and the tire downstream portion, respectively. It is preferable that the liquid can be supplied to the tire upstream portion, the tire contact portion, and the tire downstream portion so that the tire can be changed.
  • the belt traveling on the load support device can be reliably supported by securing the supply amount of the liquid to the tire contact portion and the tire upstream portion while reducing the supply amount of the liquid to the entire load support device. Therefore, the tire running test can be performed while suppressing the wear of the load supporting device and the belt as much as possible.
  • the liquid supply unit is configured such that the liquid supply amount to both sides of the contact position between the test portion and the tire in the width direction orthogonal to the flow direction and the vertical direction is the liquid supply to the contact position It is preferable that the supply amount of the liquid in the width direction can be adjusted so as to be smaller than the amount.
  • the load supporting device can be further downsized.
  • the reason is as follows.
  • the load supporting device can be downsized by making the amount of liquid supplied to both sides of the contact position in the width direction smaller than the amount of liquid supplied to the tire contact portion.
  • the tire running test apparatus is compact and can provide a tire running test apparatus suitable for tire support by a dynamic pressure method. Therefore, in the tire running test apparatus, the running test of the tire can be reliably performed while reducing the wear of the support portion and / or the belt.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tires In General (AREA)

Abstract

L'invention porte sur un appareil d'essai de roulement de pneu formé de façon compacte et approprié pour supporter un pneu par un système de pression dynamique. Une partie de support (10) est positionnée de façon à être opposée à la surface inférieure d'une courroie (6). La partie de support comprend des rainures allongées côté amont (12) s'étendant chacune dans la direction dans laquelle un composant dans la direction parallèle à la direction de déplacement de la courroie (6) est inclus et une surface de support (39) positionnée adjacente au côté aval des extrémités des rainures allongées côté amont (12) dans la direction de déplacement et plus haute que les surfaces inférieures des rainures allongées côté amont (12). La surface de support (39) est disposée plus loin sur le côté amont qu'une zone de contact de pneu (e) où le pneu (2) est mis en contact avec la courroie (6) dans la direction de déplacement.
PCT/JP2009/053024 2008-02-22 2009-02-20 Appareil d'essai de roulement de pneu WO2009104734A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008041621A JP4310364B1 (ja) 2008-02-22 2008-02-22 タイヤ走行試験装置
JP2008-041621 2008-02-22

Publications (1)

Publication Number Publication Date
WO2009104734A1 true WO2009104734A1 (fr) 2009-08-27

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Application Number Title Priority Date Filing Date
PCT/JP2009/053024 WO2009104734A1 (fr) 2008-02-22 2009-02-20 Appareil d'essai de roulement de pneu

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JP (1) JP4310364B1 (fr)
WO (1) WO2009104734A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129836A (en) * 1980-02-14 1981-10-12 Mts System Corp Flexible endless belt assembly
US4458527A (en) * 1981-11-27 1984-07-10 Eagle-Picher Industries, Inc. Apparatus for measuring the rolling resistance of tires
JPH02251733A (ja) * 1989-03-24 1990-10-09 Meidensha Corp ベルト走行路用荷重支持装置
JPH03152435A (ja) * 1989-11-09 1991-06-28 Meidensha Corp フラット面走行路用荷重支持装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129836A (en) * 1980-02-14 1981-10-12 Mts System Corp Flexible endless belt assembly
US4458527A (en) * 1981-11-27 1984-07-10 Eagle-Picher Industries, Inc. Apparatus for measuring the rolling resistance of tires
JPH02251733A (ja) * 1989-03-24 1990-10-09 Meidensha Corp ベルト走行路用荷重支持装置
JPH03152435A (ja) * 1989-11-09 1991-06-28 Meidensha Corp フラット面走行路用荷重支持装置

Also Published As

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JP2009198381A (ja) 2009-09-03
JP4310364B1 (ja) 2009-08-05

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