Abrasion powder collection device and abrasion powder collection method

Abstract

An object of the present invention is to provide an abrasion powder collection device and an abrasion powder collection method capable of collecting abrasion powder by a simple method.SOLUTION: A wear debris collection device according to an aspect of the present disclosure includes a first member configured to be rotatable about a first axis, a pressing mechanism configured to press a second member rotatable about a second axis against the first member, and a collection portion configured to collect wear debris generated by rotational friction between the second member and the first member. A method of collecting abrasion powder according to the present disclosure includes an abrasion step of pressing a second member rotating around a second axis against a first member rotating around a first axis to cause rotational friction between the first member and the second member, and a collection step of collecting abrasion powder generated by the rotational friction between the second member and the rotating first member by a collection portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a device and a method for collecting wear debris. [Background technology]

[0002] When a vehicle equipped with tires travels on a road, friction between the tire and the road surface generates wear debris, which includes both visible and invisible aerosol-type debris.

[0003] In order to evaluate the effects of such wear debris, large-scale equipment has been installed on actual vehicles, and wear debris has been collected when the vehicles have traveled distances of up to tens of thousands of kilometers (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-81931 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-described collection method, since the collection device and the like must be installed in a large space, if the tire is a drive wheel, this may impair steering and driving stability during actual driving, and also may cause a large amount of air resistance under the vehicle, which causes the tire to bear that load, resulting in wear phenomena different from the normal wear phenomena.In this case, the collected wear debris may have different properties from the wear debris generated by the normal wear phenomenon, which may make it difficult to accurately evaluate the wear debris.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a device and method for collecting abrasion powder that can collect abrasion powder using a simple method. [Means for solving the problem]

[0007] The gist and configuration of the present invention are as follows. (1) a first member configured to be rotatable around a first axis; a pressing mechanism configured to be able to press a second member rotatable around a second axis against the first member; a collecting section that collects wear powder generated by rotational friction between the second member and the first member; A wear debris collecting device comprising: Here, "wear debris" includes all powder-like matter generated by the rotational friction of a second member against a first member. Therefore, the wear debris may be wear debris from the first member, wear debris from the second member, or both. The wear debris may also take various forms. Examples include visible wear debris, aerosol-like wear debris, and a combination of these.

[0008] (2) The first member is a simulated road surface member that simulates a road surface, The wear debris collecting device according to (1) above, wherein the second member is a member that is subject to rotational friction with the simulated road surface member.

[0009] (3) The collecting unit includes a first collector that collects the wear powder, the first collector is disposed at least behind and on both sides of the second member, the first collector has a partially open box shape or a dome shape with an open bottom, and covers a part of the second member; The wear debris collecting device according to (1) or (2), wherein the collecting part is a replaceable member. Here, "rear" means that if the movement of the first member at the point where the first member and the second member are rotating and frictioning is considered as local linear movement, the direction opposite to the traveling direction of the first member is "forward of the second member," and the traveling direction of the first member is "rear of the second member."

[0010] (4) The wear debris collecting device according to any one of (1) to (3), further comprising a second member rotation drive mechanism that rotates the second member around the second axis.

[0011] (5) The first member is a simulated road surface member that simulates a road surface, The wear debris collecting device according to any one of (1) to (4), further comprising a slip angle adjustment mechanism that rotates the second member in a direction parallel to the simulated road surface of the simulated road surface member.

[0012] (6) The first member is a simulated road surface member that simulates a road surface, The wear debris collection device described in any one of (1) to (5) above, further comprising a camber angle adjustment mechanism that rotates the second member around an axis perpendicular to the simulated road surface of the simulated road surface member.

[0013] (7) A wear powder collection device according to any one of (1) to (6), wherein the first collector is arranged in the collection device at a position separated from the rotating friction surface between the first member and the second member, or a second collector separate from the first collector is arranged.

[0014] (8) The collection unit includes a collector, The collector includes a suction piping unit; The device for collecting wear debris according to any one of (1) to (7), wherein the collector is provided with any one of a suction function, an adsorption function, and an adhesion function.

[0015] (9) The first member is a simulated road surface member that simulates a road surface, an environment adjustment unit that can set the simulated road surface member to any one of a dry road surface, a wet road surface, an icy road surface, and a snowy road surface; and / or The wear debris collecting device according to any one of (1) to (8), further comprising a temperature adjusting unit that can set the temperature of the simulated road surface member.

[0016] (10) A wear powder collection device according to any one of (1) to (9), comprising a fourth collector for collecting wear powder in a first particle size range, and a fifth collector for collecting wear powder in a second particle size range that is smaller than the first particle size range.

[0017] (11) The device for collecting wear debris according to (10), wherein the fifth collector includes an electrostatic collector.

[0018] (12) The collection device according to (10) or (11), further comprising a water flow mechanism that uses water to recover the wear debris collected by the fourth collector and the fifth collector.

[0019] (13) The collection device according to (12) above, further comprising an imaging device for observing the abrasion powder collected by the water flow mechanism by any one of dry observation, bud dry observation, and wet observation.

[0020] (14) a wearing step of pressing a second member rotating around a second axis against a first member rotating around a first axis to cause rotational friction between the first member and the second member; a collecting step of collecting wear powder generated by rotational friction between the second member and the rotating first member using a collecting section.

[0021] (15) The collection method according to (14) above, further comprising a step of observing the collected wear particles by any one of dry observation, batt dry observation, and wet observation. [Effects of the Invention]

[0022] According to the present invention, it is possible to provide a device and a method for collecting abrasion powder that can collect abrasion powder using a simple technique. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a schematic diagram of a wear debris collecting device according to an embodiment of the present invention; [Figure 2] FIG. 10 is a schematic diagram of a wear debris collecting device according to another embodiment of the present invention. [Figure 3] FIG. 10 is a schematic diagram of a wear debris collecting device according to another embodiment of the present invention. [Figure 4] FIG. 10 is a schematic diagram of a wear debris collecting device according to yet another embodiment of the present invention. [Figure 5] FIG. 10 is a configuration diagram for further explaining the aggregation box and the fifth collector. DETAILED DESCRIPTION OF THE INVENTION

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0025] <Wear debris collection device> First, an example of a wear debris collecting device according to one embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a schematic diagram of a wear debris collecting device according to one embodiment of the present invention.

[0026] As shown in FIG. 1, this wear debris collection device 1 includes a first member 2 configured to be rotatable around a first axis (in this embodiment, on a plane), a pressing mechanism 4 configured to be able to press a second member 3 rotatable around a second axis against the first member 2, and a collection unit 5 that collects wear debris generated by rotational friction between the second member 3 and the first member 2.

[0027] In this example, the first member 2 is a simulated road surface member that simulates a road surface. In the illustrated example, the first member 2 is installed parallel to a horizontal plane. In the illustrated example, the "first axis" is an axis extending in the vertical direction. On the other hand, in the present disclosure, the first member 2 can also be installed at an angle with respect to the horizontal plane, in which case the "first axis" extends at an angle with respect to the vertical direction. In the illustrated example, the first member 2 has an annular shape. The outer diameter of the annular shape is not particularly limited, but can be, for example, 50 to 100 cm. In addition, the width of the main part of the first member 2 is not particularly limited as long as it is wide enough to cause rotational friction with the second member 3. However, it is also preferable that the width be greater than the width of two rotational friction surfaces with the second member 3 in order to collect wear debris corresponding to lane changes, etc.

[0028] In this embodiment, it is preferable to further include an environmental adjustment unit that can set the simulated road surface member to one of a dry road surface, a wet road surface, an icy road surface, and a snowy road surface, and / or a temperature adjustment unit that can set the temperature of the simulated road surface member. This is because it becomes possible to collect wear debris under various wear conditions. The environmental adjustment unit preferably includes at least one of a water supply unit for forming a wet road surface, an ice maker for forming an icy road surface, a snow maker for forming a snowy road surface, a heater for melting ice or snow, and a drainage groove for discharging water from the wet road surface or melted ice or snow. The temperature adjustment unit can use any known heater or the like to raise the temperature. Furthermore, a cooler can be used to lower the temperature, or water, ice, snow, etc. from the water supply unit, ice maker, or snow maker of the environmental adjustment unit can be used, or cooling can be done by leaving it alone without using anything. Here, various asphalt simulating materials, concrete simulating materials, gravel (unpaved roads such as gravel roads and soil), urethane, sandpaper, etc. can be used as the dry road surface. These can be interchangeable. The wet road surface is formed by forming a water film on these, and the thickness of the water film can be set to various values. The rotation speed of the first member 2 around the first axis is not particularly limited, but may be, for example, 4 to 400 rpm.

[0029] The second member 3 is not an internal component of the wear debris collection device 1, but is used in the wear debris collection device 1. In this example, the second member 3 is a member that is subject to rotational friction with a simulated road surface member. More specifically, the second member 3 can be an annular rubber member that simulates a tire, as in the illustrated example. In this case, the "second shaft" is the tire shaft of the simulated tire. On the other hand, in the present disclosure, the second member 3 may be any member that can generate wear debris or that generates wear debris on the first member 2 due to rotational friction, and is not limited to a rubber member, but may also be, for example, a plastic member, etc.

[0030] The wear debris collection device 1 of this embodiment preferably further includes a second member rotation drive mechanism that rotates the second member 3 around the second axis. For example, if the second member 3 is a simulated tire, it is possible to simulate a drive wheel and collect wear debris. A motor or the like can be used as the second member rotation drive mechanism. The second member rotation drive mechanism allows the second member 3 to rotate in any of a accelerating, decelerating, or constant speed mode. For example, the simulated road surface can be rotated relative to a stationary test specimen, and the rotational speed can be increased from 0 rpm to a predetermined angular velocity. For example, after the start of the test, slip deceleration (braking) can be performed from a specified maximum speed to approximately 0 km / h. On the other hand, when collecting wear debris by simulating a non-driven wheel, the second member rotation drive mechanism may not be used (turned off), or the wear debris collection device 1 may not be provided with a second member rotation drive mechanism. For example, simulating a non-driven wheel, acceleration from a stationary 0 km / h to the maximum speed may be performed. When simulating a non-driven wheel, the angular velocity of the simulated road surface may be decelerated from the accelerated state to 0.

[0031] The wear debris collection device 1 of this embodiment preferably further includes a slip angle adjustment mechanism that rotates the second member 3 in a direction parallel to the simulated road surface of the simulated road surface member. For example, if the second member 3 is a simulated tire, wear debris can be collected under conditions where a slip angle is applied. The slip angle can be set as appropriate.

[0032] The wear debris collection device 1 of this embodiment preferably further includes a camber angle adjustment mechanism that rotates the second member 3 around an axis perpendicular to the simulated road surface of the simulated road surface member. For example, if the second member 3 is a simulated tire, wear debris can be collected under conditions where a camber angle is applied. The camber angle can be set as appropriate.

[0033] The pressing mechanism 4 is movable, for example, in the vertical direction as shown in the figure, and can press the second member 3 against the first member 2 by moving it downward in the figure while holding the second member 3. It is also preferable that the pressing mechanism 4 is movable in the horizontal direction as well. The pressing force is not particularly limited, but can be, for example, 20 to 150 N.

[0034] In the illustrated example, the collection unit 5 includes a first collector 5a that collects wear debris. The first collector 5a includes a filter or the like that finally collects the wear debris. In this example, the first collector 5a is disposed near the rotating friction surface (so as to collect the wear debris before it becomes aerosolized and disperses into the air). The first collector 5a is preferably disposed behind the second member 3 and / or on one or both sides of the second member 3. This is because disposing the first collector 5a in a position where the wear debris is likely to disperse enables efficient collection of the wear debris. For the same reason, the first collector 5a is preferably disposed at least behind and on both sides of the second member 3. The first collector 5a may also be disposed within the collection device 1 at a position separated from the rotating friction surface between the first member 2 and the second member 3. On the other hand, the arrangement of the first collector 5a is not limited to these examples and can be variously arranged, for example, it can be arranged only in front of or only above the second member 3. Furthermore, in order to utilize the centrifugal force caused by the rotation of the first member 2 (utilizing the fact that wear powder is scattered radially outward by centrifugal force), the first collector 5a can also be arranged on the outer circumferential side of the first member 2.

[0035] The first collector 5a is preferably shaped to cover a portion of the second member 3. In the illustrated example, the first collector 5a is shaped like a partially open box. The first collector 5a can also have various other shapes, such as a dome shape with an open bottom. These shapes are particularly suitable for efficiently collecting wear powder. The first collector 5a can also have various other shapes, such as a flat plate, a bag, or a curved plate.

[0036] The collection unit 5 is a replaceable member. This allows contamination to be prevented by replacing the collection unit 5 for each test piece, for example, and also prevents the collection efficiency of the wear powder from decreasing due to accumulated wear powder by replacing the collection unit 5 every time a certain amount of wear powder is collected, for example.

[0037] The collection unit 5 includes a collector (e.g., the first collector 5a and / or the second collector 5b described below), and it is preferable that the collector be endowed with any of a suction function, an adsorption function, and an adhesive function. This is because this allows for efficient collection of wear powder. The suction function can be implemented, for example, by using a suction machine. The adsorption function can be implemented, for example, by applying an adsorbent. Alternatively, the collection unit 5 can further include a static electricity generator, which can apply static electricity to the second collector 5b, thereby providing the second collector 5b with the function of adsorbing the sucked wear powder or aerosolized wear powder that has been dispersed into the air. Furthermore, the adhesive function can be implemented, for example, by attaching adhesive tape. However, these are merely examples, and various methods can be used to impart the various functions described above.

[0038] FIG. 2 is a schematic diagram of a wear debris collection device according to another embodiment of the present invention. In the embodiment shown in FIG. 2, a second collector 5b, separate from the first collector 5a, is disposed within the collection device 1 at a position separated from the rotational friction surface between the first member 2 and the second member 3. That is, the second collector 5b is a collector primarily for collecting aerosolized wear debris that is not collected by the first collector 5a and dispersed into the air. This configuration allows for more thorough collection of the wear debris. In the illustrated example, the collection unit 5 also includes an auxiliary collection device 5c. For example, the auxiliary collection device 5c can be a suction device. The auxiliary collection device 5c, located near the second collector 5b, can suck in aerosolized wear debris dispersed into the air, collect it in the second collector 5b, and collect it there. This improves the efficiency of collection of aerosolized wear debris dispersed into the air. In the example of FIG. 2, it is also preferable that the first collector 5a and / or the second collector 5b be provided with any of a suction function, an adsorption function, and an adhesive function. This is because this allows for efficient collection of wear powder. The suction function can be implemented, for example, using a suction machine. The adsorption function can be implemented, for example, by applying an adsorbent. Alternatively, the collection unit 5 may further include a static electricity generator, which can apply static electricity to the second collector 5b to adsorb the sucked wear powder or aerosolized wear powder dispersed into the air. Furthermore, the adhesive function can be implemented, for example, by attaching adhesive tape. However, these are merely examples, and various methods can be used to impart the various functions described above.

[0039] The material of the first collector 5a and the second collector 5b is not particularly limited, but may be, for example, stainless steel, polypropylene, polycarbonate, or the like.

[0040] The auxiliary collection device 5c may be a blower that blows air toward the second collector 5b. In this case, the auxiliary collection device 5c does not need to be provided near the second collector 5b.

[0041] FIG. 3 is a schematic diagram of a wear debris collecting device according to another embodiment of the present invention. The collecting device 1 shown in FIG. 3 includes a third collector 5d in addition to a first collector 5a (as shown in FIGS. 1 and 2). In this example, the third collector 5d can be a collection tank. In the example shown in FIG. 3, the auxiliary collection device 5c includes a water flow generating mechanism 5c1 and a drainage groove 5c2. The third collector 5d is provided at the end of the drainage groove 5c2, and the wear debris can be collected by the third collector 5d using the water flow. In addition to the configuration shown in FIG. 3, a second collector 5b as shown in FIG. 2 may also be provided. The third collector 5d collects wear debris that has not been collected by the first collector 5a (and the second collector 5b).

[0042] The wear debris collecting device 1 can be equipped with a first thermometer that measures the temperature inside the test tank. The wear debris collecting device 1 can also be equipped with a second thermometer that measures, for example, the temperature of the second member 3 or the temperature of the rotating friction surface.

[0043] The wear debris collection device 1 may include a cleaning tool (e.g., a brush) for cleaning the inside of the device 1. As an example, the wear debris remaining on the first member 2 can be collected by the cleaning tool (e.g., a brush). The collected wear debris can be collected by suction using, for example, a suction piping unit (not shown) or the like.

[0044] The wear debris collecting device 1 may further include a particle counter for checking the particle size distribution of the wear debris in the tank (for example, the path for collecting the wear debris).

[0045] The wear debris collection device 1 may further include a device for measuring data related to rotational wear (such as the temperature inside the tank or on the rotating friction surface, the angular velocity of the first member 2 or the second member 3, particle size distribution, and elapsed time) in real time or at appropriate times, a storage device (such as a memory), a calculation device (such as a processor), and a communication device.

[0046] <Method for collecting wear debris> Next, a method for collecting wear debris according to an embodiment of the present invention will be described. As an example, the method for collecting wear debris according to an embodiment of the present invention can be performed using the wear debris collecting device according to the above embodiment.

[0047] The method for collecting wear powder in this embodiment includes a wear process in which a second member 3 rotating around a second axis is pressed against a first member 2 rotating around a first axis (in this embodiment, on a plane) to cause rotational friction between the first member 2 and the second member 3, and a collection process in which the collection unit 5 collects wear powder generated by the rotational friction between the second member 3 and the rotating first member 2.

[0048] In the method for collecting wear debris of this embodiment, the first member 2 is a simulated road surface member that simulates a road surface, and the second member 3 is a member that is subject to rotational friction with the simulated road surface member.

[0049] In the method for collecting wear powder of this embodiment, the collection unit 5 includes a first collector 5a that collects the wear powder, and in the collection step, it is preferable to arrange the first collector 5a behind the second member 3 and / or on one or both sides thereof to collect the wear powder, because this allows for efficient collection of the wear powder.

[0050] In the method for collecting wear powder of this embodiment, in the collection step, it is preferable to place the first collector 5a at least behind and on both sides of the second member 3 to collect the wear powder, because this allows for efficient collection of the wear powder.

[0051] In the method for collecting wear powder of this embodiment, it is preferable that the first collector 5a has a shape that covers a part of the second member 3. This is because it allows for efficient collection of wear powder.

[0052] In the method for collecting wear powder of this embodiment, the first collector 5a is preferably in the shape of a partially open box or a dome with an open bottom, because this allows for efficient collection of wear powder.

[0053] The method for collecting wear powder according to this embodiment preferably includes timely replacement of the collection unit 5. This allows the collection unit 5 to be replaced, for example, every time a certain amount of wear powder is collected, thereby preventing the efficiency of collecting wear powder from decreasing due to accumulated wear powder.

[0054] In the wear debris collection method of this embodiment, it is preferable that in the wear step, the second member 3 is pressed against the first member 2 while rotating the second member 3 about the second axis by a second member rotation drive mechanism that rotates the second member 3 about the second axis, thereby causing rotational friction between the first member 2 and the second member 3. For example, if the second member 3 is a simulated tire, it is possible to collect wear debris by simulating a drive wheel.

[0055] In the method for collecting wear debris of this embodiment, it is also preferable that in the wearing step, the second member 3 is not rotated around the second axis by the driving force, but is pressed against the first member 2 to cause rotational friction between the first member 2 and the second member 3. For example, if the second member 3 is a simulated tire, it is possible to collect wear debris by simulating a non-driven wheel.

[0056] In the wear debris collection method of this embodiment, the first member 2 is a simulated road surface member that simulates a road surface, and in the wearing step, it is preferable to rotate the second member 3 by the slip angle adjustment mechanism in a direction parallel to the simulated road surface of the simulated road surface member to impart an angle that simulates the slip angle. For example, if the second member 3 is a simulated tire, wear debris can be collected under conditions that impart a slip angle.

[0057] In the method for collecting wear debris of this embodiment, the first member 2 is a simulated road surface member that simulates a road surface, and in the wearing step, it is also preferable to rotate the second member 3 by the camber angle adjustment mechanism around an axis that is perpendicular to the simulated road surface of the simulated road surface member to impart an angle that simulates a camber angle. For example, if the second member 3 is a simulated tire, wear debris can be collected under conditions where a camber angle is imparted.

[0058] In the wear debris collection method of this embodiment, it is also preferable that a first collector 5a is arranged within the collection device 1 at a position separated from the rotating friction surfaces of the first member 2 and the second member 3.

[0059] In the method for collecting wear debris of this embodiment, it is also preferable that a second collector 5b, separate from the first collector 5a, is arranged within the collection device 1 at a position separated from the rotating friction surface between the first member 2 and the second member 3.

[0060] In the method for collecting wear powder of this embodiment, the collection unit 5 is provided with a collector, and it is preferable that the collector is provided with any one of a suction function, an adsorption function, and an adhesion function, because this allows for efficient collection of wear powder.

[0061] In the wear debris collection method of this embodiment, the first member 2 is a simulated road surface member that simulates a road surface, and the method preferably further includes an environment adjustment step in which an environment adjustment unit can set the simulated road surface member to any one of a dry road surface, a wet road surface, an icy road surface, and a snowy road surface, and / or a temperature adjustment step in which a temperature adjustment unit can set the temperature of the simulated road surface member, because this makes it possible to collect wear debris under various environments.

[0062] Other details regarding the method for collecting wear debris in this embodiment are the same as those described in the embodiment of the device for collecting wear debris above, and therefore will not be described again.

[0063] <Action and effect> The effects of the embodiment of the present invention will be described below: First, the effects of the wear debris collecting device according to the embodiment of the present invention will be described. The wear debris collection device 1 of this embodiment includes a first member (a simulated road surface member in this example) 2 configured to be rotatable around a first axis (on a plane in this example), a pressing mechanism 4 configured to press a second member (a rubber member in this example) 3 rotatable around a second axis against the first member 2, and a collection unit 5 that collects wear debris generated by rotational friction between the second member 3 and the first member 2. With this configuration, the first member 2 and the second member 3 are pressed by the pressing mechanism 4 while causing rotational friction between them, generating wear debris that can be collected by the collection unit 5. Therefore, wear debris can be collected without having to be collected by running an actual vehicle and a large-scale collection device on an actual road surface. As described above, the wear debris collection device 1 of this embodiment allows for the collection of wear debris using a simple method. In the present example, when a simulated road surface member is used as the first member 2 and a rubber member is used as the second member 3, for example, the material of the simulated road surface can be made the same as that of the road surface on which an actual vehicle runs, the material of the rubber member can be made the same as that of tire rubber, and the rotational friction characteristics can be appropriately adjusted to suit actual running, thereby making it possible to collect wear powder that is the same as or similar to the type of wear powder generated when an actual vehicle runs on a road surface.

[0064] Next, the effects of the method for collecting wear debris according to one embodiment of the present invention will be described. The method for collecting wear powder according to this embodiment includes a wear process in which a second member 3 rotating about a second axis is pressed against a first member 2 rotating about a first axis (in this embodiment, on a plane) to cause rotational friction between the first member 2 and the second member 3, and a collection process in which wear powder generated by the rotational friction between the second member 3 and the rotating first member 2 is collected by a collection unit 5. According to this method, in the wear process, the first member 2 and the second member 3 are pressed against each other by a pressing mechanism 4 to cause rotational friction between them, thereby generating wear powder, and in the collection process, the wear powder can be collected by the collection unit 5. Therefore, wear powder can be collected without actually traveling on a road surface using an actual vehicle and a large-scale collection device. As described above, the method for collecting wear powder according to this embodiment allows wear powder to be collected using a simple technique. In the present example, when a simulated road surface member is used as the first member 2 and a rubber member is used as the second member 3, for example, the material of the simulated road surface can be made the same as that of the road surface on which an actual vehicle runs, the material of the rubber member can be made the same as that of tire rubber, and the rotational friction characteristics can be appropriately adjusted to suit actual running, thereby making it possible to collect wear powder that is the same as or similar to the type of wear powder generated when an actual vehicle runs on a road surface.

[0065] Fig. 4 is a schematic diagram of a wear debris collector 10 according to yet another embodiment of the present invention. The wear debris collector 10 of the embodiment shown in Fig. 4 also includes a first member 20 rotatable about a first axis, a pressing mechanism 40 configured to press a second member 30 rotatable about a second axis against the first member 20, and a collector that collects wear debris generated by rotational friction between the second member 30 and the first member 20.

[0066] In the embodiment shown in FIG. 4, the first member 20 is a drum. As shown in the figure, the first member 20 and the second member (a rubber member in this example) 30 have parallel rotation axes, but are configured to rotate in the same direction on a rotational friction surface. The second member 30 is pressed against the first member 20 by a pressing mechanism 40 (extending in the front-to-rear direction in the figure). The first member 20 and the second member 30 in the embodiment shown in FIG. 4 differ from the embodiment shown in FIG. 1 etc. in that their rotation axes are parallel, but the materials and the like of each member can be configured similarly to the embodiment shown in FIG. 1 etc. For example, the embodiment shown in FIG. 4 also preferably further includes a second member rotation drive mechanism that rotates the second member 30 around the second axis. Also, for example, in the embodiment of Figure 4, the first member 20 is a simulated road surface member that simulates a road surface, and it is preferable that the first member 20 further includes an environment adjustment unit that can set the simulated road surface member to any one of a dry road surface, a wet road surface, an icy road surface, and a snowy road surface, and / or a temperature adjustment unit that can set the temperature of the simulated road surface member.

[0067] In the embodiment shown in Fig. 4, the collection unit includes a fourth collector 50d disposed below the rotational friction surface between the first member 20 and the second member 30, and a fifth collector 50e connected to the fourth collector 50d. In the embodiment of Fig. 4 as well, the collection unit is preferably a replaceable member.

[0068] In this example, the collection of the fourth collector (collection box) 50d is assisted by three auxiliary collection devices 50c (50c1, 50c2, 50c3). That is, the auxiliary collection device 50c2, which is a suction device (first suction piping unit), is disposed directly below the rotational friction surface between the first member 20 and the second member 30, so that it sucks and collects wear powder immediately after it is generated and collects it in the fourth collector (collection box) 50d. Meanwhile, the auxiliary collection device 50e1, which is a brush, collects wear powder remaining on the first member 20 in the auxiliary collection device 50c3, which is a second suction piping unit, and the wear powder is sucked and collected by the auxiliary collection device 50c3, which is a suction device (second suction piping unit), and collected in the fourth collector (collection box) 50d. The fourth collector (collection box) 50d has a collection section for collecting wear powder with a relatively large particle size. In this example, the collection unit is a plate-shaped member. Relatively large wear particles are collected on the plate-shaped member. On the other hand, relatively small wear particles (e.g., aerosolized) are collected by suction using the auxiliary collection device 50c4, which is a suction device (third suction piping unit), and are collected in the fifth collector 50e.

[0069] FIG. 5 is a configuration diagram for further explaining the collection box and the fifth collector. As shown in the figure, the fifth collector 50e includes an electrostatic collector 50e1 and a suction fan 50e2. The electrostatic collector 50e1 may be an electrostatic filter or the like. Wear particles with relatively small particle sizes are collected by the electrostatic collector 50e1. Thus, the collector 10 of the embodiment shown in FIG. 4 is configured to collect wear particles according to particle size by including the fourth collector (collection box) 50d and the fifth collector 50e. Here, "collecting according to particle size" means that the median (or average) of the particle size distribution of the wear powder collected by the fourth collector (collection box) 50d is larger than the median (or average) of the particle size distribution of the wear powder collected by the fifth collector 50e (although not particularly limited, it is preferable that it is 1.2 times or more larger), and part of the particle size distribution range of the wear powder collected by the fourth collector (collection box) 50d may overlap with part of the particle size distribution range of the wear powder collected by the fifth collector 50e.

[0070] The wear debris collection device 10 of the embodiment shown in FIG. 4 includes a first member 20 rotatable about a first axis, a pressing mechanism 40 configured to press a second member 30 rotatable about a second axis against the first member 20, and a collection unit that collects wear debris generated by rotational friction between the second member 30 and the first member 20. As in the previous embodiments, the first member 20 and the second member 30 are pressed by the pressing mechanism 40 while causing rotational friction between them, generating wear debris that can then be collected by the collection unit. Therefore, wear debris can be collected without actually driving a vehicle and a large-scale collection device on a road surface to collect the wear debris. As described above, the wear debris collection device 10 of the embodiment shown in FIG. 4 can also collect wear debris using a simple method. In particular, in this example, the collection unit includes a suction device, and the suction device 50c2 is located directly below the rotating friction surface, enabling efficient collection of wear debris.

[0071] Furthermore, in the embodiment of FIG. 4, the collection unit includes a collection box 50d and a fifth collector 50e. Therefore, the collection box 50d collects relatively large wear particles, while the fifth collector 50e, which includes the electrostatic collection unit 50e1, collects relatively small wear particles. This enables thorough collection of wear particles with a wide particle size distribution. The particle size distribution of the collected wear particles is preferably measured using a particle counter. Furthermore, when electrostatic collection is performed on an actual vehicle, for example, there is a risk of contamination with undesired substances on the road surface or the generated wear particles being lost, resulting in an inaccurate particle size distribution. However, when electrostatic collection is performed using the collection device 10, by generating wear particles in a closed environment, a wide range of particle sizes can be thoroughly collected, resulting in an accurate particle size distribution.

[0072] The abrasion debris collected in this manner is preferably collected using water, such as with a water flow mechanism. Specifically, in the collection box 50d and the fifth collector 50e, a diluted surfactant can be sprayed onto the collector portion (e.g., the filter portion) where the abrasion debris is captured, and then the abrasion debris can be collected using running water. This prevents the abrasion debris from coagulating and allows the abrasion debris adhering to the collector to be collected with a smaller amount of water. In this case, collection using a liquid other than water can also be performed, promoting the settling of the abrasion debris due to differences in specific gravity, allowing for efficient separation.

[0073] The collected wear particles can be observed, for example, as follows. (A) Drying observation As an example, an appropriate amount of the uniformly stirred suspension can be placed in a white petri dish or the like, dried, and then observed under a microscope. The observed image can be analyzed using image analysis software to obtain the particle size distribution of the wear particles. The wear particles from the test piece are mostly black due to their characteristics, so it is preferable to use a white petri dish to make it easier to classify other properties.

[0074] (B) Bud drying observation For example, an appropriate amount of uniformly stirred suspension can be placed in a stainless steel tray, dried, collected, sieved, and then uniformly dispersed for photographing and image analysis.

[0075] (C) Wet observation Using a dynamic image analyzer, images of the wear debris can be taken in suspension and analyzed.

[0076] In analyses such as those described above in (B) and (C), it is desirable for the suspension to be of a relatively high concentration. Concentration can shorten the time required for drying in the subsequent process. Concentration can be performed, for example, by: (i) adding a few drops of a surfactant to the collected suspension and pouring it into a sedimentation container. The abrasion particles are allowed to settle over time (the surfactant allows the abrasion particles floating on the water surface to settle). (ii) Inserting a hose filled with water above the water surface and using the siphon principle to drain the supernatant of the suspension, which does not contain the abrasion particles (this allows the concentration of the suspension to be increased while minimizing the generation of water currents). Furthermore, concentration tends to promote aggregation of wear particles, so it is necessary to break up the aggregation or to devise a way to eliminate the effects of aggregation before analysis. Therefore, when taking images without further manipulation after drying as in (A) above, it is preferable to dry and observe without concentration.

[0077] The wear debris collection device 10 of the embodiment in Figure 4 preferably further includes a slip angle adjustment mechanism that rotates the second member 30 in a direction parallel to the simulated road surface of the simulated road surface member. For example, if the second member 30 is a simulated tire, wear debris can be collected under conditions that impart a slip angle. The slip angle can be set as appropriate. The wear debris collection device 10 of the embodiment in Figure 4 preferably further includes a camber angle adjustment mechanism that rotates the second member 30 around an axis perpendicular to the simulated road surface of the simulated road surface member. For example, if the second member 30 is a simulated tire, wear debris can be collected under conditions where a camber angle is applied. The camber angle can be set as appropriate.

[0078] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. [Explanation of symbols]

[0079] 1: Wear debris collection device, 2: First member (simulated road surface member), 3: Second member (rubber member), 4: Pressing mechanism, 5: collection section, 5a: first collector, 5b: second collector, 5c: Collection auxiliary machine, 5c1: Water flow generating mechanism, 5c2: drains, 5d: third collector, 10: wear debris collection device, 20: First member (drum), 30: Second member (rubber member), 40: Pressing mechanism, 50c: Collection auxiliary machine, 50c1 to 50c4: 1st to 4th collection auxiliary machines, 50d: fourth collector, 50e: 5th collector, 50e1: electrostatic collection unit, 50e2: Suction fan

Claims

1. a first member configured to be rotatable about a first axis; a pressing mechanism configured to be able to press a second member rotatable around a second axis against the first member; a collecting section that collects wear powder generated by rotational friction between the second member and the first member; A wear debris collecting device comprising:

2. the first member is a simulated road surface member that simulates a road surface, 2. The wear debris collecting device according to claim 1, wherein the second member is a member that is subject to rotational friction with the simulated road surface member.

3. the collecting unit includes a first collector that collects the wear powder, the first collector is disposed at least behind and on both sides of the second member, the first collector has a box-like shape with a partially open bottom or a dome-like shape with a partially open bottom, and covers a part of the second member; The wear debris collecting device according to claim 1 or 2, wherein the collecting portion is a replaceable member.

4. 3. The wear debris collecting device according to claim 1, further comprising a second member rotation drive mechanism that rotates the second member about the second axis.

5. the first member is a simulated road surface member that simulates a road surface, 3. The wear debris collecting device according to claim 1, further comprising a slip angle adjustment mechanism that rotates the second member in a direction parallel to the simulated road surface of the simulated road surface member.

6. the first member is a simulated road surface member that simulates a road surface, 3. The wear debris collecting device according to claim 1, further comprising a camber angle adjusting mechanism that rotates the second member around an axis that is perpendicular to the simulated road surface of the simulated road surface member.

7. 3. The wear debris collection device according to claim 1, wherein the first collector is disposed within the collection device at a position spaced apart from the rotating friction surfaces of the first member and the second member, or a second collector separate from the first collector is disposed.

8. The collection unit includes a collector, The collector includes a suction piping unit; 3. The device for collecting wear debris according to claim 1, wherein the collector is provided with any one of a suction function, an adsorption function, and an adhesion function.

9. the first member is a simulated road surface member that simulates a road surface, an environment adjustment unit that can set the simulated road surface member to any one of a dry road surface, a wet road surface, an icy road surface, and a snowy road surface; and / or The wear debris collecting device according to claim 1 or 2, further comprising a temperature adjusting unit that can set the temperature of the simulated road surface member.

10. 3. The wear debris collection device according to claim 1, further comprising: a fourth collector for collecting wear debris in a first particle size range; and a fifth collector for collecting wear debris in a second particle size range that is smaller than the first particle size range.

11. The wear debris collecting device according to claim 10 , wherein the fifth collector comprises an electrostatic collector.

12. The collection device according to claim 10 , further comprising a water flow mechanism that uses water to recover the wear debris collected by the fourth collector and the fifth collector.

13. The collection device according to claim 12 , further comprising an imaging device for observing the abrasion powder collected by the water flow mechanism by any one of dry observation, bud dry observation, and wet observation.

14. a wearing step of pressing a second member rotating around a second axis against a first member rotating around a first axis to cause rotational friction between the first member and the second member; a collecting step of collecting wear powder generated by rotational friction between the second member and the rotating first member using a collecting section.

15. The collection method according to claim 14, further comprising the step of observing the collected wear particles by any one of dry observation, bud dry observation, and wet observation.

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