JP2011107078A - Tire testing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire testing device suppressing deviation and meandering of a metal belt by raising a friction force between the metal belt and a metal pulley. <P>SOLUTION: The tire testing device, including a metal belt 22 which is wound on metal pulleys 21 on both sides in endless manner to form a flat travel band and a load support means 23 which is arranged on the inside of the metal belt 22 to receive a load from a tire T, and making the tire T travel on the travel band of the metal belt 22, keeps a friction increase material 32 which suppresses meandering and deviation of the metal belt 22 arranged between the metal pulleys 21 and the metal belt 22. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tire testing apparatus.

  In general, when performing a simulation test on a tire, a wheel, a suspension, or the like, a flat belt type tire testing apparatus that reproduces a state in which the tire is in contact with a road surface may be used.

  As shown in FIGS. 4 and 5, the flat belt type tire testing apparatus includes a belt 2 that is wound endlessly on pulleys 1 on both sides, and a load support means 3 that is disposed on the inner surface side of the belt 2. Yes.

  The pulleys 1 on both sides are composed of a driving pulley 4 and a driven pulley 5 that are arranged with a constant interval. The drive pulley 4 is supported by the bearing portion 6 and the driven pulley 5 is supported by the bearing portion 7. The drive pulley 4 and the driven pulley 5 have bearing portions 6 and bearing portions on both sides in the axial direction. A frame 8 supporting 7 is attached. Further, a rotational driving means 9 (see FIG. 5) such as a driving motor is connected to one side of the driving pulley 4 via a bearing portion 6, and connected to the bearing portion 7 on both sides of the driven pulley 5. An expansion / contraction means 10 such as a jack is disposed. The frames 8 on both sides are provided with slide portions 11 so that the driven pulley 5 is slid along the longitudinal direction of the frame 8 by the expansion / contraction means 10. Furthermore, support legs 12 are provided at the lower portions of the frames 8 on both sides so as to be positioned directly below the bearing portion 6 and the bearing portion 7, and the support legs 12 are arranged on a pedestal 13.

  The belt 2 is formed of a thin sheet so as to follow the curved surfaces of the drive pulley 4 and the driven pulley 5, and a planar traveling zone 2 a is formed between the drive pulley 4 and the driven pulley 5, and the tire T is It is possible to run.

  The load support means 3 includes a support portion 3 a having innumerable injection holes on the surface and is disposed between the drive pulley 4 and the driven pulley 5 so as to be positioned on the vertical line of the contact surface of the tire T inside the belt 2. The support portion 3a is provided with a compressor 3c for supplying air via a supply line 3b, and air is injected from the injection hole of the support portion 3a onto the inner surface of the belt 2 so as to receive a load of the tire T or the like.

  When testing the state of the tire T, wheel, suspension, etc., the belt 2 is rotated at a high speed by the rotational drive means 9 to form a traveling zone 2a that moves between the drive pulley 4 and the driven pulley 5. Various tests are performed by reproducing the state in which the tire T is in contact with the road surface.

  At the same time, if the tire T is tested with a slip angle (the angle at which the steering wheel is cut), or if there is a deviation or error in the parallelism of the belt 2, the parallelism of the pulley 1, or the manufacturing accuracy, the belt 2 On the other hand, since a force acts in the lateral direction, the expansion and contraction means 10 and the like on both sides of the driven pulley 5 are used to suppress displacement and meandering of the belt 2.

  In addition, as prior art document information of a tire test apparatus having high relevance to the present invention, for example, there is Patent Document 1 below.

JP 2006-208265 A

  However, in such a tire testing apparatus, since the pulley 1 and the belt 2 are made of metal from the viewpoint of durability, the frictional force between the pulley 1 and the belt 2 is low, and the belt 2 is displaced or meandered due to skidding. There was a problem that it was likely to occur. Further, during high speed operation, the belt 2 moves away from the surface of the pulley 1 due to centrifugal force, so that the frictional force between the pulley 1 and the belt 2 is further reduced, and the belt 2 is liable to be displaced and meandered. There is a problem that the belt 2 loses control completely and contacts the structure such as the frame 8. Further, when the belt 2 is operated with the tension of the belt 2 increased against the centrifugal force acting on the belt 2, there is a problem in that the belt 2 is broken or a life is rapidly reduced.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tire testing device that increases friction between a metal belt and a metal pulley to suppress displacement and meandering of the metal belt.

  The tire testing apparatus of the present invention includes a metal belt that is endlessly wound around metal pulleys on both sides to form a flat traveling belt, and a load support that is disposed on the inner surface side of the metal belt and receives a load from the tire. And a tire test apparatus for running a tire in a running zone of the metal belt, wherein a friction increasing material for suppressing the displacement and meandering of the metal belt is disposed between the metal pulley and the metal belt. It is.

  In the tire testing apparatus of the present invention, it is preferable to attach the friction increasing material to the outer peripheral surface of the metal pulley and / or the back surface of the metal belt.

  In the tire testing apparatus of the present invention, it is preferable that the friction increasing material is composed of at least one of a resin tape, a resin member, a powder resin, an adhesive, and an adhesive.

  In the tire testing apparatus of the present invention, the metal pulleys on both sides include a driving pulley connected to the rotation driving means and a driven pulley connected to the meandering control means, and the friction increasing material is used as the driving pulley and / or the driven pulley. It is preferable to provide.

  According to the tire testing apparatus of the present invention, since the friction increasing material is disposed between the metal pulley and the metal belt, the friction force between the metal pulley and the metal belt is increased, and slippage and meandering due to slip are suppressed. The test can be performed stably. Even when centrifugal force acts on the metal belt during high-speed operation, the friction-increasing material prevents the friction force between the metal pulley and the metal belt from decreasing, prevents slippage and meandering due to slipping, and the metal belt into the structure. It is possible to appropriately prevent the contact state and perform the test stably. Furthermore, when a friction increasing material is arranged between the metal pulley and the metal belt, it is not necessary to increase the tension of the metal belt so as to increase the frictional force. An excellent effect that it can be prevented can be achieved.

It is a side view which shows the example of embodiment which implements this invention. It is a top view which shows the example of an embodiment which implements this invention. It is a graph which shows the amount of meandering by a friction increasing material. It is a side view which shows the conventional tire test apparatus. It is a top view which shows the conventional tire test apparatus.

  Embodiments of the present invention will be described below with reference to FIGS. In the figure, the same reference numerals as those in FIGS. 4 and 5 denote the same components.

  The tire testing apparatus according to the embodiment includes a metal belt 22 that is endlessly wound around metal pulleys 21 on both sides to form a flat traveling band 22a, and is disposed on the inner surface side of the metal belt 22 from the tire T. Load supporting means 23 for receiving the load of.

  The metal pulleys 21 on both sides are composed of a driving pulley 24 and a driven pulley 25 that are arranged at a fixed interval, and the driving pulley 24 and the driven pulley 25 are made of steel, stainless steel, or the like. The drive pulley 24 is supported by a bearing portion 26, and the driven pulley 25 is supported by a bearing portion 27. On both sides in the axial direction of the drive pulley 24 and the driven pulley 25, a bearing portion 26 and a bearing portion 27 are provided. Is attached. Further, rotational drive means 29 (see FIG. 2) such as a drive motor is connected to one side of the drive pulley 24 via a bearing portion 26, and connected to the bearing portion 27 on both sides of the driven pulley 25. A meandering control means 30 such as a jack is arranged. The frames 28 on both sides are provided with slide portions 31 so that the driven pulley 25 is slid along the longitudinal direction of the frame 28.

  Here, the drive pulley 24 and / or the driven pulley 25 includes a friction increasing material 32 on the outer peripheral surface (shown in FIG. 1 shows a state of being disposed on the driven pulley 25), and the friction increasing material 32 is a resin tape or resin member. , And at least one of powder resin, adhesive, and pressure-sensitive adhesive, and the thickness ranges from several microns to several tens of mm (note that the thickness of the friction increasing material 32 is emphasized in FIG. 1). ). More specifically, a resin tape having an adhesive or adhesive on the back surface, another material tape having an adhesive or adhesive on the back surface, a resin member fixed with an adhesive or an adhesive, or other baking Resin member fixed by fixing means, powder resin fixed with adhesive or adhesive, resin powder fixed by other fixing means such as baking, adhesive disposed alone, adhesion disposed alone Consists of agents. Further, the resin of the resin tape, the resin member, and the resin powder is a resin such as vinyl, fluororesin, or rubber, and other resins may be used as long as they increase the frictional resistance as compared with metal. Furthermore, other materials for arranging the pressure-sensitive adhesive or the like are cellophane, fiber, and the like, and other materials may be used as long as they increase the frictional resistance compared to metal. Further, the friction increasing material 32 may be disposed on the entire outer peripheral surface of the drive pulley 24 or the driven pulley 25, or may be disposed in a line along the circumferential direction on the outer peripheral surface of the drive pulley 24 or the driven pulley 25. In addition, the outer peripheral surface of the drive pulley 24 and the driven pulley 25 may be disposed in a part along the axial direction, or may be disposed in another shape. Further, since the friction increasing material 32 is easily worn on both ends of the driving pulley 24 and the driven pulley 25, the friction increasing material 32 may be disposed only in the center portion. Furthermore, when a fluid film such as water is formed on the surface of the drive pulley 24 or the driven pulley 25, a groove may be provided so as to suppress a decrease in frictional force.

  The metal belt 22 is formed of a thin metal sheet such as steel so as to follow the curved surfaces of the drive pulley 24 and the driven pulley 25, and a planar traveling band 22 a is formed between the drive pulley 24 and the driven pulley 25. Thus, the tire T can run. Further, the metal belt 22 is configured to withstand the tension from the driving pulley 24 and the driven pulley 25 and the load from the tire T. Here, the material of the metal belt 22 is not particularly limited as long as it can withstand the tension. Further, the metal belt 22 may be provided with a friction increasing material on the inner peripheral surface. When the metal belt 22 is provided with a friction increasing material, the same type of friction increasing as that provided in the driving pulley 24 and the driven pulley 25 is provided. Material can be used.

  Further, a sensor 33 (see FIG. 2) for detecting a lateral shift in the traveling direction of the metal belt 22 is disposed above the metal belt 22, and the sensor 33 detects the shift of the metal belt 22 to meander control means. The correction pulse is sent to 30 and the deviation or meandering of the metal belt 22 is corrected according to the amount of the correction pulse.

  The load support means 23 is arranged between the drive pulley 24 and the driven pulley 25 so that the support portion 23 a having innumerable injection holes on the surface is positioned on the vertical line of the contact surface of the tire T inside the metal belt 22. In addition, a compressor 23c for supplying air to the support portion 23a via the supply line 23b is provided, and air is injected from the injection holes of the support portion 23a to the inner surface of the metal belt 22 so as to receive the load of the tire T or the like. . Here, as another example, the load support means 23 includes a contact body (not shown) provided with a low-friction lubricant such as Teflon (registered trademark), and the contact body is provided by lifting means (not shown) such as a jack. May be brought into contact with the inner surface of the metal belt 22 to receive a load.

  The operation of the embodiment for carrying out the present invention will be described below.

  When testing the state of the tire T, wheel, suspension (not shown), etc., the metal belt 22 is rotated at high speed via the drive pulley 24 by the rotational drive means 29, and the drive pulley 24 and the driven pulley 25 are A state where the planar traveling zone 22a is formed between the tire T and the road surface is reproduced, and various tests are performed.

  At the same time, depending on the case where the tire T is tested with a slip angle (the angle at which the steering wheel is cut), or when the parallelism of the metal belt 22, the parallelism of the metal pulley 21, or the manufacturing accuracy causes a deviation or error, When a lateral force due to sliding acts on the metal belt 22, the meandering control means 30 controls the sensor 33 via a correction pulse, and the friction increasing material 32 suppresses displacement and meandering of the metal belt 22.

  Hereinafter, the meandering amount of the metal belt 22 when a plurality of friction increasing materials 32 are used was compared.

[Comparison condition]
In the comparison, a friction increasing material 32 is disposed between the driven pulley 25 and the metal belt 22, and further, as the friction increasing material 32, an adhesive tape made of cellophane, an adhesive, a Teflon (registered trademark) fluororesin tape, rubber powder ( Resin powder), urethane rubber (resin member), and a conventional metal (iron) surface were used. Further, the control amount (meandering amount) at the belt speed was detected under the condition that the tire load was 1960 N (200 kgf) and the slip angle (SA) was 2 °, and the friction increasing materials were compared. Here, the control amount (meandering amount) is a deviation amount of the metal belt 22 detected by the sensor 33. More specifically, a sensor for controlling the deviation or meandering of the metal belt 22 by moving the driven pulley 25. 33 is the amount of the correction pulse transmitted from 33 to the drive source of the meandering control means 30.

[Table 1]

  As a result, as shown in [Table 1] and the graph of FIG. 3, on the conventional metal (iron) surface consisting only of the driven pulley 25 and the metal belt 22, the control amount (correction pulse amount) is about 45 km / h or more. It became larger than 200,000, and meandering was so severe that it became impossible to run. On the other hand, when a friction increasing material such as an adhesive tape, an adhesive, a fluororesin tape, rubber powder, or urethane rubber is disposed between the driven pulley 25 and the metal belt 22, it is between the driven pulley 25 and the metal belt 22. The frictional force was increased, the amount of meandering was greatly reduced from that of the conventional metal (iron) surface, and the meandering control means 30 could be sufficiently controlled. In addition, the friction increasing material has a smaller amount of meandering in the order of adhesive tape, adhesive, urethane rubber, rubber powder, and fluororesin tape, and it has become clear that the fluororesin tape is most suitable.

  Thus, according to the embodiment, since the friction increasing material 32 is disposed between the metal pulley 21 and the metal belt 22, the friction force between the metal pulley 21 and the metal belt 22 is increased. The test can be stably performed by suppressing slippage and meandering due to sliding. Even when centrifugal force acts on the metal belt 22 during high-speed operation, the friction-increasing material 32 prevents the friction force between the metal pulley 21 and the metal belt 22 from decreasing, prevents slippage and meandering, and prevents the metal belt from slipping. The state where 22 contacts the structure can be prevented appropriately, and the test can be performed stably. Further, when the friction increasing material 32 is disposed between the metal pulley 21 and the metal belt 22, it is unnecessary to increase the tension of the metal belt 22 so as to increase the frictional force. It is possible to appropriately prevent a decrease in life.

  In the embodiment, when the friction increasing material 32 is attached to the outer peripheral surface of the metal pulley 21 and / or the back surface of the metal belt 22, the friction increasing material 32 can be easily disposed on the metal pulley 21 and / or the metal belt 22. Thus, the test can be stably performed by simply suppressing slippage and meandering due to slipping.

  In the embodiment, when the friction increasing material 32 is composed of at least one of a resin tape, a resin member, a powder resin, an adhesive, and an adhesive, the frictional force between the metal pulley 21 and the metal belt 22 is appropriately set. The test can be performed stably by further suppressing the slippage and meandering caused by slipping.

  When a resin tape such as a fluororesin tape or a vinyl tape is used as the friction increasing material 32, the surface of the resin tape is in close contact with the metal pulley 21 and the metal belt 22, and between the metal pulley 21 and the metal belt 22. The frictional force can be suitably increased. When a silicon (registered trademark) resin tape is used, deterioration of the resin tape can be suppressed, and the frictional force between the metal pulley 21 and the metal belt 22 can be maintained for a long period of time. Here, when the resin tape is a vinyl tape, it is preferable to wrap the vinyl tape uniformly around the metal pulley 22 in a single layer, and when the resin tape is a fluororesin tape such as silicon (registered trademark). It is preferable that the fluororesin tape is uniformly wound around the metal pulley 22 in a 1 to 2 layer. On the other hand, when the vinyl tape is wound twice or more, there arises a problem that the outer vinyl tape is peeled off by the release agent previously applied to the surface of the vinyl tape. Further, when the thickness of the resin tape such as vinyl tape and fluororesin tape is thin, the durability is lowered. When the thickness of the resin tape such as vinyl tape and fluororesin tape is thick, the metal belt 22 is caused by the softness of the resin tape. This causes a problem that the running stability and straight running stability of the metal belt 22 are impaired. The number of windings and thickness of the resin tape are not particularly limited as long as they are uniform and can maintain the prevention of peeling of the resin tape, durability, running stability of the metal belt 22, and the like.

  When an adhesive tape such as cello tape (registered trademark) is used as the friction increasing material 32, the friction increasing material 32 is very easily disposed between the metal pulley 21 and the metal belt 22, and the cost of the friction increasing material 32 is reduced. can do. Here, when the adhesive tape is cello tape (registered trademark), it is preferable to wrap the cello tape (registered trademark) uniformly around the metal pulley 22 in a single layer. On the other hand, when the cello tape (registered trademark) is wound twice or more, a problem arises that the outer cello tape (registered trademark) is peeled off by the release agent previously applied to the surface of the cello tape (registered trademark). Further, when the thickness of the adhesive tape such as cello tape (registered trademark) is thin, the durability is lowered, and when the thickness of the adhesive tape such as cello tape (registered trademark) is large, the metal belt 22 is inclined due to the softness of the adhesive tape. And the running stability and straight running stability of the metal belt 22 are impaired. The number and thickness of the adhesive tape are not particularly limited as long as they are uniform and can maintain the prevention of peeling of the adhesive tape, durability, running stability of the metal belt 22, and the like.

  When a resin member such as urethane rubber is used as the friction increasing material 32, the frictional force between the metal pulley 21 and the metal belt 22 can be appropriately increased and the cost of the friction increasing material 32 can be reduced. Here, the resin member disposed on the metal pulley 21 and the metal belt 22 is preferably several microns to several tens of millimeters depending on the hardness, and particularly preferably about 5 to 10 mm in the case of urethane rubber. On the other hand, when the thickness of the resin member is thin, the durability is lowered, and when the thickness of the resin member is thick, the metal belt 22 is inclined due to the softness of the resin member. Cause the problem of damage. The thickness of the resin member is not particularly limited as long as it is uniform and can maintain durability, running stability of the metal belt 22, and the like.

  When a resin powder such as rubber powder is used as the friction increasing material 32, when only an adhesive or a pressure sensitive adhesive is used, seams and step portions are eliminated as compared with a resin tape or resin member. The degree of adhesion to the belt 22 can be increased, and the frictional force between the metal pulley 21 and the metal belt 22 can be suitably increased. Further, when only the adhesive or the adhesive is used, the adhesive force and the adhesive force can be further added to the frictional force, so that the frictional force between the metal pulley 21 and the metal belt 22 can be appropriately and easily increased. . Here, the resin powder, the adhesive, and the adhesive disposed on the metal pulley 21 and the metal belt 22 preferably have a thickness of 1 mm or less, and more preferably about 0.1 mm. When the thickness is reduced, the durability and frictional force are reduced, and when the thickness is increased, the metal belt 22 is inclined due to the softness of the resin powder and the like, and the running stability and straight running stability of the metal belt 22 are impaired. This causes a problem. Further, when the thickness of the adhesive is increased, there is a problem that it takes time to dry. The thicknesses of the resin powder, the adhesive, and the pressure-sensitive adhesive are not particularly limited as long as they are uniform and can maintain durability, running stability of the metal belt 22, and the like.

  In the embodiment, the metal pulleys 21 on both sides include a drive pulley 24 connected to the rotation drive means 29 and a driven pulley 25 connected to the meandering control means 30, and the drive pulley 24 and the driven pulley 25 are frictioned. When the increasing member 32 is provided, the frictional force between the metal pulley 21 and the metal belt 22 can be suitably increased. In particular, if the driven pulley 25 is provided with the friction increasing material 32, it is possible to perform the test stably by suppressing the slippage and the meandering due to the slip, in combination with the control of the meandering control means 30.

  Note that the tire testing device of the present invention is not limited to the above-described illustrated examples, and it is needless to say that various changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 21 Metal pulley 22 Metal belt 22a Traveling belt 23 Load support means 24 Drive pulley 25 Driven pulley 29 Rotation drive means 30 Meander control means 32 Friction increase material T Tire

Claims (4)

  A metal belt that is looped endlessly on metal pulleys on both sides to form a flat running belt, and a load support means that is disposed on the inner surface side of the metal belt and receives a load from a tire, and the metal belt A tire testing apparatus for running a tire in a traveling zone of claim 1, wherein a friction increasing material that suppresses displacement and meandering of the metal belt is disposed between the metal pulley and the metal belt.   The tire testing apparatus according to claim 1, wherein the friction increasing material is attached to the outer peripheral surface of the metal pulley and / or the back surface of the metal belt.   The tire testing apparatus according to claim 1 or 2, wherein the friction increasing material is composed of at least one of a resin tape, a resin member, a powder resin, an adhesive, and an adhesive.   The metal pulleys on both sides include a driving pulley connected to the rotation driving means and a driven pulley connected to the meandering control means, and a friction increasing material is provided on the driving pulley and / or the driven pulley. Item 4. The tire test apparatus according to any one of Items 1 to 3.

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