JP2007132472A - Condition detection device for disk rotor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect the condition of fins provided on a disk rotor. <P>SOLUTION: The condition detection device 100 for the disk rotor includes a distance detecting section 20 which detects a distance between the fins 16 provided on the disk rotor 10, a control section 30 which judges the degradation states of the fins 16 based on the distance d between the fins 16, and a reporting section 40 which reports the judged degradation states of the fins. In the disk rotor condition detection device 100, when the fins 16 provided on the disk rotor 10 change over time due to rust and wear so that the distance between the adjacent fins 16 changes, it is possible to judge the degradation states of the fins 16 by detecting the distance by the distance detecting section 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disk rotor state detection device that detects a state of a disk rotor used in a braking device.

2. Description of the Related Art Conventionally, there is known a disc brake that brakes a vehicle by sandwiching a disc rotor that rotates with a tire from both sides with a disc pad that is moved by hydraulic pressure. Patent Document 1 discloses a disk rotor in which a disk with which a friction pad is pressed is a hollow disk having a predetermined interval, and a large number of fins are radially provided in the hollow part.
JP-A-3-333 JP 2000-506262 A

  However, since the fins are provided between the sliding portions where the friction pads are pressed from both sides, it is difficult to visually confirm the state. For this reason, it may be possible to continue to use the disk rotor without noticing it even when the state of the fin of the disk rotor has changed due to rust and the time for replacement has come.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a disk rotor state detection device that detects the state of fins provided in the disk rotor.

  In order to solve the above-described problems, a disk rotor state detection device according to an aspect of the present invention includes means for detecting a shape change of a fin provided in the disk rotor.

  According to this aspect, it is possible to detect a change in shape when the fins provided on the disc rotor change with time due to rust or wear, so that it is possible to prompt the occupant or operator to replace the disc rotor.

  Another embodiment of the present invention is also a disk rotor state detection device. The disk rotor state detection device includes an interval detection unit that detects an interval between fins provided on the disk rotor, and a control unit that determines a deterioration state of the fin from the interval between the fins.

  According to this aspect, when the fin provided on the disk rotor changes over time due to rust or wear and the interval between the fins changes, the interval detection unit detects this interval to determine the deterioration state of the fin. can do. Further, by providing the interval detection unit outside the fin, it is possible to determine the deterioration of the fin without processing the fin itself, and thus it is possible to suppress the cost increase of the disk rotor.

  You may further provide the alerting | reporting part which alert | reports the degradation state of the determined fin. According to this aspect, it is possible to more appropriately notify the occupant and the worker of the shape change including the deterioration of the disk rotor.

  Yet another embodiment of the present invention is also a disk rotor state detection device. This apparatus includes a fin provided in the disc rotor, and a moving unit that is fixed with a gap in a space provided inside the fin and detects a shape change of the fin. When the shape of the fin is changed, the moving portion is released from a portion fixed to the fin, and emits a sound when it hits another member when moving in the space.

  According to this aspect, the moving part in the initial state of the disc rotor is fixed with a gap in the space provided inside the fin. And the shape of a fin changes with rust and abrasion, it is released when the location fixed until then is exposed, and a movement part can move in space. Since the movable moving part is arranged with a gap in the space, it collides with the fins and other members arranged inside the fins by the rotation of the disk rotor and the vibration of the vehicle, and generates a collision sound. . As a result, it is possible to notify the occupants and workers of the deterioration of the fins and prompt the exchange of the disk rotor.

  According to the present invention, it is possible to prompt an occupant or an operator to replace the disk rotor.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

(First embodiment)
The disk rotor state detection device according to the present embodiment can detect a change in the shape of a fin provided in the disk rotor. FIG. 1 is a perspective view of a disk rotor in which the disk rotor state detection device according to the present embodiment can be suitably used. FIG. 2 is a block diagram showing the configuration of the disk rotor state detection device according to the present embodiment. FIG. 3 is a schematic diagram for explaining the detection principle of the disk rotor state detection device according to the present embodiment.

(Disc rotor state detection device)
As shown in FIG. 1, the disk rotor 10 is a disk-like member having an annular sliding portion 12 on both sides, and a hole 14 through which the wheel shaft passes is provided at the center. A plurality of fins 16 for radiating frictional heat during braking and cooling the disk rotor 10 are provided between the two sliding portions 12 with a predetermined interval. Further, an interval detection unit 20 that detects an interval between adjacent fins 16 is disposed on the inner peripheral side of the disk rotor 10. As the interval detection unit 20, one that detects the interval between the fins 16, such as an eddy current type or capacitance type gap sensor, an optical sensor that detects transmitted light or reflected light, and the like can be used.

  As shown in FIG. 2, the disk rotor state detection device 100 includes an interval detection unit 20, a control unit 30, and a notification unit 40.

  As shown in FIG. 3, the interval detector 20 is disposed on the inner peripheral side of the disk rotor 10 and detects the interval d between adjacent fins 16 when the disk rotor 10 rotates (in the direction of arrow B). Here, as the interval d, a narrow gap on the inner peripheral side among the gaps between adjacent fins 16 may be detected. In general, during cooling, gas flows from the inner peripheral side to the outer peripheral side along the fin 16 (in the direction of arrow A), and therefore the shape of the inner peripheral side of the fin 16 is likely to change due to rust. Therefore, by disposing the interval detection unit 20 on the inner peripheral side of the fin 16, it is possible to detect a narrow interval on the inner peripheral side where the shape change rate of the fin 16 provided in the disk rotor 10 is large.

  More specifically, immediately after the disk rotor 10 is replaced, the distance d between adjacent fins 16 becomes d1 shown by a solid line, and when the fins 16 change to the shape shown by a dotted line due to deterioration such as rust, the adjacent fins 16 are changed. The distance d is d2 shown by a dotted line. Further, the interval detection unit 20 is connected to a control unit 30 such as an ECU provided outside the disk rotor 10 by a conductive wire.

  The control unit 30 determines information to be notified by the notification unit 40 from the information on the shape change detected by the interval detection unit 20 and controls the notification unit 40. Here, the information on the shape change includes information when the fin 16 is deteriorated due to wear or the like and its shape is physically changed, and information when the fin 16 is physically or materially changed due to rust. For example, even when the surface layer portion of the fin 16 made of metal or the like is oxidized and the magnetic permeability or reflectance changes, information on the shape change can be detected by appropriately selecting and using a sensor used as the interval detection unit 20. . Further, the control unit 30 compares the signal value S and the predetermined value C with the storage unit 32 that stores the predetermined value C for comparison with the detected signal value S corresponding to the interval d, and notifies the notification unit 40. And a calculation unit 34 for determining the deterioration state of the fins to be notified.

  The alerting | reporting part 40 alert | reports the information of a shape change. As the notification unit 40, for example, a worker who inspects and maintains parts of a passenger or a vehicle by using a display device such as a lamp that lights or blinks, a speaker that emits sound, and a liquid crystal that displays characters and symbols (hereinafter referred to as a worker) Such as passengers).

  By notifying the occupant or the like of such shape change information, the disk rotor can be replaced at an appropriate time, and unnecessary inspection work can be reduced, and safer vehicle operation can be achieved.

(Degradation state determination method)
Next, a method for determining the deterioration state from the fin shape change and notifying the occupant or the like of the replacement time of the disk rotor will be described. FIG. 4 is a flowchart for detecting a change in the shape of the fin provided on the disk rotor in the disk rotor state detection apparatus according to the present embodiment.

  As shown in FIG. 4, the disc rotor state detection apparatus 100 detects the signal value S having a correspondence relationship with the interval d by the interval detection unit 20 (S11). The signal value S can be detected at a desired timing. A predetermined value C is stored in the storage unit 32 in order to determine the replacement time of the disk rotor 10 due to deterioration of the fins 16. The predetermined value C has a correspondence relationship with the interval d0 as a threshold for determining the replacement time. Then, the signal value S is compared with a predetermined value C by the calculation unit 34 (S12).

  Here, when S <C (No in S12), the calculation unit 34 determines that the interval d between the fins 16 is smaller than the interval d0 as a threshold value. That is, since the shape change due to the deterioration of the fins 16 is not enough to replace the disk rotor 10, the detection is terminated without particularly notifying the passenger or the like.

  On the other hand, when S ≧ C (Yes in S12), the calculation unit 34 determines that the interval d between the fins 16 is larger than the interval d0 as a threshold value. In this case, it is determined that the deterioration of the fins 16 has progressed considerably, and the control unit 30 controls the notifying unit 40 so as to notify the occupant and the like of the content urging replacement of the disc rotor 10 (S13).

  As described above, according to the disk rotor state detection device 100, it is possible to detect a shape change when the fin 16 provided in the disk rotor 10 changes with time due to rust or wear, and to determine the deterioration state of the fin 16. be able to. For this reason, it is possible to prompt the occupant to replace the disc rotor properly without removing the disc rotor 10 and making a visual check, thereby reducing unnecessary inspection work and safer vehicle operation. it can.

(Second Embodiment)
Also by the disk rotor state detection device according to the present embodiment, it is possible to detect the shape change of the fins provided in the disk rotor. In this embodiment, the moving part which detects the shape change of a fin is provided in fin itself. FIG. 5A is a top view of the main part showing an outline of the disk rotor according to the present embodiment, FIG. 5B is a cross-sectional view showing the structure of the disk rotor state detection device of FIG. (C) is sectional drawing which showed typically the structure of the fin in the state which the fin deteriorated. FIG. 6A, FIG. 6B, and FIG. 6C are schematic views for explaining a fin manufacturing method in the disk rotor state detection device according to the present embodiment.

  As shown in FIG. 5 (a), the disk rotor 110 cools the disk rotor 110 by dissipating frictional heat during braking between the two annular sliding portions 112, as in the first embodiment. The plurality of fins 116 are provided with a predetermined interval.

  As shown in FIG. 5B, at least one of the plurality of fins 116 is fixed with a gap 116 a in a space provided inside the fin 116, and moves to detect a shape change of the fin 116. A portion 118 is provided. The restricting portion 120 is fixed to the fin 116 and is not fixed to the moving portion 118. Further, the restricting unit 120 guides the moving unit 118 to restrict the moving direction when moving in the space provided inside the fin. A protrusion 118 a is provided at the tip of the moving part 118, and this protrusion 118 a is fixed to a region R on the inner peripheral side of the fin 116 having a diameter smaller than the diameter of the restricting part 120. As a result, the moving unit 118 is fixed in the space provided in the fin 116 in the initial replacement state of the disk rotor 110. The disc rotor state detection device 200 includes such a fin 116 and a moving unit 118 fixed inside the fin.

  As an example of a manufacturing method of the disk rotor state detection device 200, first, as shown in FIG. 6A, a first hole 116b having a diameter substantially the same as the diameter of the protrusion 118a is formed in the fin 116. Further, as shown in FIG. 6B, the second hole 116c having a diameter substantially the same as the diameter of the restricting portion 120 is formed at a position shallower than the first hole 116b. Then, as shown in FIG. 6C, the restricting portion 120 in which the moving portion 118 is inherently inserted is inserted into the second hole 116c, and the protruding portion 118a protruding from the restricting portion 120 is fitted into the first hole 116b. As a result, the moving unit 118 is fixed to the fin 116. Finally, the second hole 116c is closed by the lid 122, and the restricting portion 120 is fixed to the fin 116, whereby the disc rotor state detection device 200 is manufactured.

  Thus, in the disk rotor state detection device 200 including the fin 116 and the moving unit 118, as shown in FIG. 5C, the fin 116 deteriorates due to rust and changes its shape (dotted line in FIG. 5C). (Change from a solid line to a solid line), the inner peripheral side of the fin 116 disappears, and the fixing of the projection 118a is released. The moving unit 118 can move in a space provided inside the fin 116. As a result, when the disc rotor 110 rotates during traveling of the vehicle or the like, the movable portion 118 whose fixation is released moves in the radial direction of the disc rotor 110 (the arrow direction shown in FIG. 5C) inside the restricting portion 120. A sound is generated by hitting the regulating unit 120. As a result, an occupant or the like can know the replacement time of the disk rotor by the generation of this sound.

  In this embodiment, the replacement time is notified by a sound generated when the moving unit 118 hits the restricting unit 120 which is a member provided inside the fin. However, the moving unit 118 is not provided without the restricting unit 120. You may provide in the inside of the fin 116. FIG. In this case, the replacement time may be notified by a sound generated when the moving unit 118 directly contacts the fins 116.

  As described above, according to the disk rotor state detection device 200, the shape change when the fin 116 provided in the disk rotor 10 changes with time due to rust or wear is detected in the moving unit 118 in the space provided inside the fin 116. Can be detected by a sound hitting another member, and the deterioration state of the fin 116 can be determined. Therefore, it is possible to prompt the occupant to replace the disk rotor properly without removing the disk rotor 110 and performing visual confirmation, thereby reducing unnecessary inspection work and safer vehicle operation. it can.

It is a perspective view of a disk rotor which can use suitably the disk rotor state detection device concerning a 1st embodiment. It is a block diagram which shows the structure of the disc rotor state detection apparatus which concerns on 1st Embodiment. It is a schematic diagram for demonstrating the detection principle of the disc rotor state detection apparatus which concerns on 1st Embodiment. 6 is a flowchart when detecting a change in the shape of a fin provided in the disk rotor in the disk rotor state detection device according to the first embodiment. FIG. 5A is a top view of the main part showing an outline of the disk rotor according to the present embodiment, FIG. 5B is a cross-sectional view showing the structure of the disk rotor state detection device of FIG. (C) is sectional drawing which showed typically the structure of the fin in the state which the fin deteriorated. FIG. 6A, FIG. 6B, and FIG. 6C are schematic views for explaining a manufacturing method of the disk rotor state detection device according to the present embodiment.

Explanation of symbols

  10 disk rotors, 12 sliding parts, 14 holes, 16 fins, 20 interval detection parts, 30 control parts, 32 storage parts, 34 calculation parts, 40 notification parts, 100 disk rotor state detection devices, 110 disk rotors, 112 slidings 116, 116 fin, 116 a gap, 116 b first hole, 116 c second hole, 118 moving unit, 118 a protrusion, 120 regulating unit, 122 lid, 200 disc rotor state detection device.

Claims (4)

  A disk rotor state detection device comprising means for detecting a shape change of a fin provided on a disk rotor. An interval detector for detecting the interval between the fins provided on the disc rotor;
A control unit for determining a deterioration state of the fin from the interval between the fins;
A disk rotor state detection device comprising:   The disk rotor state detection device according to claim 2, further comprising a notification unit that notifies the determined deterioration state of the fin. Fins provided on the disk rotor;
A moving part that is fixed with a gap in a space provided inside the fin and detects a change in the shape of the fin;
With
A disk rotor state in which the moving portion emits a sound when a portion fixed to the fin is released when the shape of the fin changes, and hits another member when moving in the space Detection device.

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