JP6460461B2 - Wheel speed sensor mounting structure - Google Patents

Description

  The present invention relates to a vehicle wheel speed sensor mounting structure.

  In the control of a vehicle such as an antilock brake system (ABS), information on the rotational speed of the wheel may be used. The wheel speed sensor for detecting the rotational speed of the wheel is fixed to the vehicle body side facing the sensor rotor fixed to the rotating shaft of the wheel inside the disc wheel.

  As a mounting structure of the wheel speed sensor, Patent Document 1 describes a structure in which the bracket is fixed to the mounting support and extends toward the toothed wheel so as to straddle the rotor disk, and the sensor is attached to the tip of the bracket. Yes.

  Patent Document 2 discloses a mounting structure for a wheel rotation sensor in which two bosses protrude from the flange surface of the brake flange, a plate-like bracket is fixed to the tips of the two bosses, and a wheel rotation sensor is attached to the bracket. Is described. The two boss portions are integrally formed on the flange surface of the brake flange by casting. The wheel rotation sensor is positioned and attached in a state of being close to the sensor rotor by cutting two boss portions.

JP-A-4-87865 JP 2008-126767 A

  However, the bracket extending toward the toothed wheel separated from the mounting support, such as the bracket described in Patent Document 1, tends to have low support rigidity, and, for example, its resonance frequency is included in the frequency band of the brake squeal. In this case, the sensor (wheel speed sensor) may be erroneously detected due to resonance with the brake squeal.

  On the other hand, in the wheel rotation sensor (wheel speed sensor) mounting structure described in Patent Document 2, since the wheel speed sensor is supported by two boss portions, it is supported as compared to the case where the wheel speed sensor is supported by one boss portion. Stiffness can be increased. For this reason, even if the brake flange and the sensor rotor are arranged apart from each other and the length of the boss portion is set long, the resonance frequency is set higher than the frequency band of the brake squeal, and the problem of the above-mentioned Patent Document 1 Can be avoided. However, this brake flange has a boss part integrally formed on the flange surface by casting to attach a wheel speed sensor, and parts (brake flange) are shared with vehicles that do not require a wheel speed sensor. It is difficult to do. For this reason, the brake flange of a vehicle that does not require a wheel speed sensor cannot be used for a vehicle that requires a wheel speed sensor, and a special brake flange must be prepared by casting, which increases costs. May be incurred.

  Therefore, an object of the present invention is to provide a mounting structure for a wheel speed sensor that can increase the support rigidity for the wheel speed sensor and can reduce the cost by using common parts.

In order to solve the above problem, a wheel speed sensor mounting structure according to the present disclosure includes a sensor rotor, a brake flange, a bracket, and a wheel speed sensor. The sensor rotor has a portion to be detected on one side surface, is arranged so as to intersect with a rotating shaft of a wheel that rotates with respect to the vehicle body, and is fixed to the rotating shaft. The brake flange has a flange surface that is spaced from the one side surface of the sensor rotor along the rotation axis and faces the one side surface of the sensor rotor, and is fixed to the vehicle body side. The bracket has a pair of column portions extending from a base end portion on the brake flange side to a tip end portion on the sensor rotor side, and a sensor support portion connecting the tip portions of the pair of column portions, and the flange surface of the brake flange It is fastened and fixed to. The wheel speed sensor is attached to the sensor support portion between the pair of column portions of the bracket, faces the rotation locus of the detected portion of the sensor rotor, and detects the detected portion from a direction substantially parallel to the rotation axis.
A first aspect of the present invention is a wheel speed sensor mounting structure according to the above disclosure, wherein the pair of column portions extend along a rotation axis. The wheel speed sensor is fixed to a region between a pair of column portions of the sensor support portion of the bracket. A bracket has a base part which connects the base end part of a pair of pillar part. The base portion of the bracket has at least two fastening and fixing portions fastened and fixed to the flange surface of the brake flange on the same arc around the rotation axis, and the base end portions of the pair of column portions of the bracket Are arranged on the same arc as the two fastening and fixing portions between the two fastening and fixing portions.

  In the above configuration, the bracket fixed to the brake flange includes a pair of column portions and a sensor support portion that connects the tip ends of the pair of column portions, and the wheel speed sensor is attached to the sensor support portion. That is, since the wheel speed sensor is supported by two (one pair) column parts, the support rigidity can be increased as compared with the case where the wheel speed sensor is supported by one column part.

  Further, since it is not necessary to perform special processing or the like on the brake flange side, the brake flange can be used in common with a vehicle that does not require a wheel speed sensor, and costs can be reduced.

  According to a second aspect of the present invention, there is provided the wheel speed sensor mounting structure according to the first aspect, wherein the sensor support portion is formed separately from the pair of column portions, and the tip ends of the pair of column portions. Fastened to the part.

  In the above configuration, since the sensor support portion and the pair of column portions are separate bodies, the pair of column portions are fixed to the brake flange before the sensor support portion is fixed to the pair of column portions. Can do. For this reason, for example, even when the fastening position of the bolt for fixing the bracket to the brake flange is between the pair of pillar portions, when fastening the bolt, the instrument for fastening the bolt and the sensor support portion Can be avoided, and the workability of the wheel speed sensor mounting work is improved.

  According to a third aspect of the present invention, there is provided the wheel speed sensor mounting structure according to the first aspect or the second aspect, wherein the bracket is integrally formed with the pair of pillars. The base end portion is connected, and the base portion is fastened and fixed in a state of surface contact with the flange surface of the brake flange.

  In the above configuration, since the bracket has a base portion that is integrally formed with the pair of column portions and connects the base end portions of the pair of column portions, the pair of column portions are reinforced by the base portion, and the bracket is supported. Increased rigidity.

  Further, the length of the column portion is shortened by the thickness of the base portion, and the support rigidity of the bracket is increased.

  In addition, since the base portion is fastened and fixed in a state of surface contact with the flange surface of the brake flange, compared to the case where the base end portion of the pair of column portions is directly fixed to the flange surface side of the brake flange, The contact area of the portion in contact with the flange surface side is increased. For this reason, the fastening fixing location by a volt | bolt etc. can be increased by the part which a contact area spreads, and the support rigidity of a bracket can be improved.

  According to the present invention, it is possible to increase the support rigidity for the wheel speed sensor and reduce the cost by sharing the parts.

It is a perspective view of the attachment structure of the wheel speed sensor which concerns on this embodiment. It is the side view which looked at FIG. 1 from the arrow II direction. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is a disassembled perspective view of a bracket. It is a perspective view of the bracket of the assembled state.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 is a perspective view of a wheel speed sensor mounting structure according to the present embodiment, FIG. 2 is a side view of FIG. 1 viewed from the direction of arrow II, and FIG. 3 is a cross-sectional view taken along the line III-III of FIG. FIG. 4 is an exploded perspective view of the bracket, and FIG. 5 is a perspective view of the bracket in an assembled state. 1 shows a state in which the brake shoe is omitted, and FIG. 2 shows a state in which the hub is omitted. In each figure, FR indicates the front of the vehicle and UP indicates the upper side. Moreover, in the following description, the left-right direction means the left-right direction with the vehicle facing forward.

  As shown in FIGS. 1-3, in this embodiment, in order to acquire the information of the rotational speed of the wheel used for control of the anti-lock brake system (ABS) of a vehicle, it is a hub with respect to the rotating shaft of a wheel. The rotation of the sensor rotor 10 fixed via 2 is detected by a wheel speed sensor 40 fixed to the vehicle body side. The wheel speed sensor 40 is provided in a vehicle having a drum type brake mechanism, and is fixed to the brake flange 20 of the axle case 1 on the vehicle body side via the sensor bracket 30. The vehicle body side refers to a side (a non-rotating side) that rotatably supports the rotating shaft of the wheel. In the present embodiment, the wheel speed sensor 40 is disposed inside the disc wheel (not shown) of the right rear wheel of the vehicle body. However, the wheel speed sensor 40 may be disposed at a position where rotation of another wheel is detected.

  Axle case 1 (in this embodiment, a rear axle case) is provided at the rear of the lower frame of the vehicle, and accommodates a rotating shaft of a wheel that transmits rotation from a differential gear housed in the center to left and right disc wheels. At the same time, it supports the vehicle weight. Note that the wheels and the rotating shafts of the wheels inside the axle case 1 are not shown.

  The hub 2 is disposed at an outer end portion in the vehicle width direction of the axle case 1 and is rotatably attached to the axle case 1 on the vehicle body side via a rotating portion 3 (see FIG. 3) having a bearing. Fixed relative to the shaft.

  The sensor rotor 10 is an annular body that is fixed to the hub 2 concentrically with the rotation axis of the wheel extending in the vehicle width direction, and is detected on the inner side surface (one side surface) 12 that intersects the rotation axis of the wheel. Part 11. Concavities and convexities are continuously formed in the detected portion 11 at predetermined intervals.

  The brake flange 20 has a flange surface 21 that is spaced apart from the sensor rotor 10 inward in the vehicle width direction and faces the inner surface 12 in the vehicle width direction of the sensor rotor 10, and the wheel rotation axis from the outer surface of the axle case 1. It is fixed to the axle case 1 so as to protrude into a disk shape centering on the axle. The brake flange 20 has a plurality of (8 in this embodiment) bolt holes 22 (only two bolt holes are shown in FIG. 3) which penetrate in the vehicle width direction and have internal threads formed on the inner peripheral surface thereof. ) Is formed. As will be described later, the anchor bracket 50 and the sensor bracket 30 are fastened and fixed to the brake flange 20 by a plurality of (eight in the present embodiment) bolts 23 screwed into the female threads of the bolt holes 22.

  The anchor bracket 50 includes a fixed plate portion 54, a wall portion 55, a pair of anchor pins 53, and an S cam support portion 56. The fixed plate portion 54 is an annular plate that comes into surface contact with the flange surface 21 of the brake flange 20 from the vehicle width direction outside, and a plurality of (8 in the present embodiment) positions corresponding to the bolt holes 22 of the brake flange 20. ) Bolt holes 57 (only two bolt holes are shown in FIG. 3). Of the eight bolt holes 57, the fixing region 72 (the region covered with the sensor bracket 30 in FIG. 2) of the fixing plate portion 54 in the vehicle width direction outer side surface 71 is fixed. The three bolt holes 57 are formed. The wall portion 55 projects from the outer peripheral edge portion of the outer peripheral edge portion of the fixed plate portion 54 to the outside in the vehicle width direction and stands up with respect to the fixed plate portion 54. The pair of anchor pins 53 are shafts that rotatably support one end sides of the substantially arc-shaped pair of brake shoes 51, extend in the vehicle width direction along the rotation axis of the wheel, and are arranged in the vicinity of each other. And is supported by the wall portion 55. The S cam support portion 56 is disposed in a region of the fixed plate portion 54 opposite to the pair of anchor pins 53 with respect to the rotation axis of the wheel, and supports the S cam 52 in a freely rotatable manner. The anchor bracket 50 has a plurality of bolts 23 inserted through a plurality of bolt holes 57 in a state where the inner surface in the vehicle width direction of the fixed plate portion 54 is in surface contact with the flange surface 21 of the brake flange 20 from the outer side in the vehicle width direction. The bolt 23 is fastened and fixed to the brake flange 20. In FIG. 2, seven of the eight bolts 23 are shown, and the remaining one is hidden by a second bracket 32 described later.

  Each of the pair of brake shoes 51 has a lining 58 fixedly on the outer peripheral surface thereof, one end side is rotatably supported by the anchor pin 53, and the other end side is mutually connected by a return spring 59. A rotatable roller 70 is fixed to the other end of the brake shoe 51. When the brake is not operated, the pair of brake shoes 51 are urged to a non-operating position in which the other ends of the pair of brake shoes 51 are close to each other and the lining 58 is not in sliding contact with a later-described brake drum (not shown). .

  The S cam 52 is disposed between the rollers 70 at the other end of the pair of brake shoes 51 and is rotationally driven by a brake chamber (not shown). The outer surface of the S cam 52 comes into contact with the roller 70 at the other end of the brake shoe 51 as the S cam 52 rotates, and the brake shoe 51 is expanded by separating the other end of the brake shoe 51 from each other. The brake drum (not shown) is disposed so as to cover the brake shoe 51 from the outside in the vehicle width direction, is fixed to the hub 2, and rotates together with the rotating shaft of the wheel. When the brake shoe 51 is expanded, the lining 58 fixed to the outer peripheral surface of the brake shoe 51 is brought into sliding contact with the inner peripheral surface of the brake drum, and a braking force acts on the rotating shaft (wheel) of the rotating wheel.

  As shown in FIGS. 1 to 3, the sensor bracket (bracket) 30 is fixed to the brake flange 20 with the fixing plate portion 54 of the anchor bracket 50 sandwiched between the flange surface 21 of the brake flange 20. . The sensor bracket 30 is disposed on the inner diameter side of the wall portion 55 of the anchor bracket 50 and supports the wheel speed sensor 40.

  As shown in FIGS. 4 and 5, the sensor bracket 30 includes a first bracket 31 and a second bracket (sensor support portion) 32 that is separate from the first bracket 31. 4 and 5, the lower side in the drawing corresponds to the inner side in the vehicle width direction of the vehicle.

  The first bracket 31 is integrally formed by a base portion 33 that extends in an arc shape around the rotation axis of the wheel and a pair of column portions 34 that extend in the vehicle width direction. The base portion 33 includes a bottom surface 35 that is in surface contact with the vehicle width direction outer side surface 71 (see FIGS. 2 and 3) of the fixing plate portion 54 of the anchor bracket 50, and the vehicle width direction inner side surface 12 (FIG. 1 and FIG. 3) and three bolt holes 37 a to 37 c that communicate with the bottom surface 35 and the surface 36 and penetrate in the vehicle width direction. The three bolt holes 37a to 37c are formed at both end portions of the base portion 33 extending in an arc shape and the central portion thereof. In the region between the bolt holes 37 a and 37 c at both ends of the base portion 33, the base end portions 34 a of the pair of pillar portions 34 are arranged at positions sandwiching the bolt holes 37 b so as to be integrated with the surface 36 of the base portion 33. It is formed. The pair of column portions 34 extend from the base end portion 34 a toward the tip end portion 34 b on the inner side surface 12 side of the sensor rotor 10 in the vehicle width direction. Bolt holes 38 extending inward in the vehicle width direction are formed in the tip end portions 34b of the pair of column portions 34, respectively. A female thread is formed on the inner peripheral surface of the bolt hole 38. In the first bracket 31, the bolt 23 is connected to the three bolts of the base portion 33 in a state where the bottom surface 35 of the base portion 33 is in surface contact with the fixing region 72 of the vehicle width direction outer side surface 71 of the fixing plate portion 54 of the anchor bracket 50. The bolts 23 are screwed into the bolt holes 22 of the brake flange 20 by passing through the holes 37 a to 37 c and the three bolt holes 57 of the fixing plate portion 54 of the anchor bracket 50, thereby being fastened and fixed to the brake flange 20 ( 2 and 3).

  The second bracket 32 is bent from an outer diameter portion of the base plate portion 32a, the cylindrical sensor fixing portion 32b, and the base plate portion 32a, and extends inward in the vehicle width direction. The extending portion 32c and the thin plate-like harness fixing portion 32d are fixed to the pair of column portions 34 by a pair of bolts 62, and the tip portions 34b of the pair of column portions 34 are connected. The base plate portion 32a is a flat plate extending in an arc shape, and bolt holes 39 into which the bolts 62 can be inserted are formed at both ends thereof. The bolt holes 39 at both ends of the base plate portion 32a are disposed at positions corresponding to the bolt holes 38 at the tip portions 34b of the pair of column portions 34. Two foot portions 60a of a substantially U-shaped support plate portion 60 that supports the sensor fixing portion 32b are provided in the central region 61 between the two bolt holes 39 on the outer surface in the vehicle width direction of the base plate portion 32a. Fixed. The cylindrical sensor fixing portion 32b is fixed to the central region 61 of the arc-shaped base plate portion 32a and the outer diameter portion of the support plate portion 60 by welding or the like while extending in the vehicle width direction. A wheel speed sensor 40, which will be described later, is inserted and fixed to the inner diameter portion of the sensor fixing portion 32b. The extending portion 32c continuously extends from the outer diameter portion at one end portion of the base plate portion 32a toward the inner side in the vehicle width direction along the side surface of the column portion 34 on one side. The thin plate-like harness fixing portion 32d is disposed on the distal end side (inward in the vehicle width direction) of the extending portion 32c extending from the base plate portion 32a and is fixed to the extending portion 32c. The harness fixing portion 32d is a metal thin plate that can be easily deformed and is formed in a substantially U shape. The harness fixing portion 32d that is a thin plate is engaged with a harness 48 that extends from a wheel speed sensor 40 described later. By deforming, the harness 48 is fixed to the second bracket 32. The length of the extended portion 32c and the position of the harness fixing portion 32d are set so that the output portion 42 of the wheel speed sensor 40 and the harness fixing portion 32d, which will be described later, are substantially at the same position in the vehicle width direction.

  The wheel speed sensor 40 includes a detection unit 41 on the outer side in the vehicle width direction and an output unit 42 on the inner side in the vehicle width direction, and is formed in a rod shape. The detection unit 41 is an optical sensor that measures a relative distance, and detects the distance of the sensor rotor 10 to the detected unit 11 (see FIG. 1). The output unit 42 outputs the difference in the distance to the unevenness of the detected portion 11 read by the detection unit 41 as a pulse waveform to the control device (not shown) via the harness 48. The control device receives the pulse signal output from the output unit 42 of the wheel speed sensor 40 via the harness 48, and determines whether the rotation speed obtained from the received pulse signal or the brake pedal (not shown) is depressed. On the basis of a stop lamp signal or the like indicating ABS, ABS control for restricting braking of a brake drum (not shown) by the brake shoe 51 is performed. The wheel speed sensor 40 is inserted into the cylindrical sensor fixing portion 32b of the second bracket 32 from the detection portion 41 side before fixing the second bracket 32 to the first bracket 31, and the vehicle width of the sensor fixing portion 32b. It is fixed to the sensor fixing part 32b so that the detection part 41 protrudes from the outer end in the direction. In addition, after fixing the wheel speed sensor 40 to the second bracket 32 and before fixing the second bracket 32 to the first bracket 31, the harness 48 extending from the output portion 42 is fixed to the second bracket 32 by the harness fixing portion 32d. To do.

  Next, attachment of the wheel speed sensor 40 according to the present embodiment will be described. The wheel speed sensor 40 is fixed to the brake flange 20 via the sensor bracket 30. First, the fixing plate portion 54 of the anchor bracket 50 is inserted into the bolt hole 22 of the brake flange 20 with the inner surface in the vehicle width direction of the fixing plate portion 54 of the anchor bracket 50 being in surface contact with the flange surface 21 of the brake flange 20. Fastened and fixed with five bolts 23. As shown in FIG. 2, the five bolts 23 have bolt holes 57 arranged at positions where the sensor bracket 30 is not fixed (areas other than the fixing area 72) among the eight bolt holes 57 of the anchor bracket 50. This is a bolt 23 to be inserted. Next, the bottom surface 35 of the base portion 33 of the first bracket 31 of the sensor bracket 30 is brought into surface contact with the fixing region 72 of the outer surface 71 in the vehicle width direction of the fixing plate portion 54 of the anchor bracket 50 fixed to the brake flange 20. In this state, the first bracket 31 is fastened and fixed to the brake flange 20 by the three bolts 23 together with the anchor bracket 50. Finally, the second bracket 32 in a state where the wheel speed sensor 40 and the harness 48 are fixed is fastened and fixed to the bolt holes 38 of the tip portions 34b of the pair of column portions 34 of the first bracket 31 by the bolts 62. Thereby, the wheel speed sensor 40 is fixed to the brake flange 20 via the sensor bracket 30. In a state where the wheel speed sensor 40 is fixed to the brake flange 20, the detection unit 41 of the wheel speed sensor 40 is in a direction substantially parallel to the rotation axis of the wheel with respect to the rotation locus of the detected part 11 of the sensor rotor 10. And are close to the rotation trajectory of the detected part 11. Note that the length from the bottom surface 35 of the sensor bracket 30 to the outer end in the vehicle width direction of the sensor fixing portion 32b is the detection portion 41 of the wheel speed sensor 40 in a state where the wheel speed sensor 40 is fixed to the brake flange 20. Is set to a length close to the rotation locus of the detected portion 11 of the sensor rotor 10.

  In the mounting structure of the wheel speed sensor 40 configured as described above, the first bracket 31 of the sensor bracket 30 fixed to the brake flange 20 has a pair of column portions 34 and a pair of column portions. The wheel speed sensor 40 is fixed via the second bracket 32 to the tip end portion 34 b of the 34. Thus, since the wheel speed sensor 40 is supported by the two (one pair) column portions 34, the support rigidity can be increased as compared with the case where the wheel speed sensor 40 is supported by one column portion.

  Further, since both base end portions 34 a of the pair of column portions 34 of the sensor bracket 30 and the base portion 33 are integrally formed, the pair of column portions 34 are reinforced by the base portion 33, and the support rigidity of the sensor bracket 30. Will increase.

  Further, since the pair of column portions 34 respectively extend from the surface 36 of the base portion 33 toward the sensor rotor 10, the length of the column portion 34 is equal to the thickness of the base portion 33 (the distance between the bottom surface 35 and the surface 36). The support rigidity of the sensor bracket 30 is increased.

  Further, the bottom surface 35 of the base portion 33 of the sensor bracket 30 is in surface contact with the vehicle width direction outer side surface 71 of the fixing plate portion 54 of the anchor bracket 50. For this reason, for example, the fixed region 72 has a fixed region 72 as compared with the case where the base end portion 34a of the pair of column portions 34 is brought into contact with the outer surface 71 in the vehicle width direction of the fixed plate portion 54 of the anchor bracket 50 without the base portion 33. Since it spreads, the fastening fixing location of the volt | bolt 23 can be increased by the part which the fixed area | region 72 spreads, and the support rigidity of the sensor bracket 30 can be improved.

  Further, the bottom surface 35 of the base portion 33 (of the first bracket 31) of the sensor bracket 30 is in surface contact with the fixing region 72 of the vehicle width direction outer side surface 71 of the fixing plate portion 54 of the anchor bracket 50. Increased stability.

  Further, since it is not necessary to perform special processing or the like for fixing the sensor bracket 30 to the brake flange 20 on the brake flange 20 side (including the anchor bracket 50), the vehicle speed sensor 40 is not required. The brake flange 20 and the anchor bracket 50 can be used in common, and the cost can be reduced.

  Therefore, according to the present embodiment, it is possible to increase the support rigidity with respect to the wheel speed sensor 40 and reduce the cost by sharing the parts.

  In addition, since the sensor bracket 30 includes the first bracket 31 and the second bracket 32, only the first bracket 31 is fixed to the brake flange 20 before the second bracket 32 is fixed to the first bracket 31. be able to. For this reason, when the bolt 23 is inserted into the bolt hole 37b of the base portion 33 of the first bracket 31 and the bolt 23 is fastened, interference between the instrument for fastening the bolt 23 and the second bracket 32 is avoided. Thus, the workability of the work of attaching the wheel speed sensor 40 is improved.

  Further, since the extending portion 32c is extended along the side surface of the column portion 34 on one side, and the harness fixing portion 32d is disposed at the distal end portion of the extending portion 32c, the column portion 34 and the wall portion 55 of the anchor bracket 50 are arranged. A harness 48 can be disposed in a narrow space between them and fixed to the vehicle body side.

  Further, the second bracket 32 in a state where the wheel speed sensor 40 and the harness 48 are fixed is fixed to the first bracket 31 fixed to the brake flange 20. Therefore, the harness 48 is attached to the vehicle body after the wheel speed sensor 40 is attached to the brake flange 20 as in the case where the harness 48 is disposed in a narrow space between the column portion 34 and the wall portion 55 of the anchor bracket 50. Even when it is difficult to fix to the side, the harness 48 disposed in the narrow space can be easily fixed to the vehicle body side.

  Further, the second bracket 32 has an extending portion 32c extending along the side surface of the column portion 34 on one side, and the harness fixing portion 32d is disposed on the distal end side (in the vehicle width direction) of the extending portion 32c. The For this reason, by setting the length of the extending portion 32c to a desired length, the harness 48 can be disposed and fixed at a desired position in the vehicle width direction of the pillar portion 34 along the pillar portion 34. it can.

  In this embodiment, the sensor bracket 30 is fastened and fixed to the brake flange 20 with the fixing plate portion 54 of the anchor bracket 50 sandwiched between the flange surface 21 of the brake flange 20. The sensor bracket 30 may be fastened and fixed to the fixing plate portion 54 of the anchor bracket 50 fastened and fixed to the flange surface 21. In other words, fastening the sensor bracket 30 to the flange surface 21 of the brake flange 20 is not limited to fastening the sensor bracket 30 to the flange surface 21 of the brake flange 20, and is not limited to the flange surface 21 of the brake flange 20. By fixing the sensor bracket 30 to another member to be fixed (for example, the fixing plate portion 54 of the anchor bracket 50 in this embodiment), the sensor bracket 30 is connected to the flange surface 21 of the brake flange 20 via the other member. Including the case of fastening and fixing.

  In the present embodiment, the fixing plate portion 54 of the anchor bracket 50 is disposed between the flange surface 21 of the brake flange 20 and the bottom surface 35 of the base portion 33 of the sensor bracket 30, and the bottom surface of the base portion 33 of the sensor bracket 30. Although the sensor bracket 30 is fixed to the brake flange 20 in a state where the surface 35 is in surface contact with the fixing region 72 of the vehicle width direction outer side surface 71 of the fixing plate portion 54 of the anchor bracket 50, the sensor bracket 30 is not limited to this. Absent. For example, the fixing plate portion 54 of the anchor bracket 50 is not disposed between the flange surface 21 of the brake flange 20 and the bottom surface 35 of the base portion 33 of the sensor bracket 30, and the bottom surface 35 of the base portion 33 of the sensor bracket 30 is used as the brake flange. The sensor bracket 30 may be fixed to the brake flange 20 in a state of being in surface contact with the 20 flange surfaces 21. That is, the state in which the base portion 33 of the sensor bracket 30 is in surface contact with the flange surface 21 of the brake flange 20 is not limited to the state in which the base portion 33 is in direct surface contact with the flange surface 21 of the brake flange 20. This includes a state in which the base portion 33 is in surface contact with another member (in this embodiment, the fixing plate portion 54 of the anchor bracket 50) fixed to the flange surface 21 side of the flange 20.

  In the present embodiment, the sensor bracket 30 includes the first bracket 31 and the second bracket 32 that is separate from the first bracket 31. However, the present invention is not limited to this. The sensor bracket 30 in which 31 and the second bracket 32 are integrally formed may be used.

  The sensor bracket 30 may not have the base portion 33. That is, the base end portions 34 a of the pair of column portions 34 of the first bracket 31 may be fixed to the fixing plate portion 54 of the anchor bracket 50 or the flange surface 21 of the brake flange 20.

  In the present embodiment, the extending portion 32c and the harness fixing portion 32d are provided on the second bracket 32, but the extending portion 32c and the harness fixing portion 32d may not be provided.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to the content of the said embodiment, Of course, it can change suitably in the range which does not deviate from this invention. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  For example, in the present invention, the sensor rotor 10 and the wheel speed sensor 40 are not limited to the configuration of the above-described embodiment. For example, as the sensor rotor, an annular detected portion in which S poles and N poles are alternately magnetized is used. While using what has, you may use what detects a magnetic field as a wheel speed sensor.

  Moreover, the information on the rotational speed of the wheel acquired by the wheel speed sensor 40 is not limited to use for ABS control of the vehicle, but may be used for other control.

  Moreover, in the said embodiment, although the wheel speed sensor 40 was provided in the vehicle which has a drum type brake mechanism, you may provide in the vehicle which has a disc brake mechanism.

1: Axle case
2: Hub 10: Sensor rotor 11: Detected portion 12: Inner side surface of the sensor rotor in the vehicle width direction (one side surface of the sensor rotor)
20: Brake flange 21: Flange surface 30: Sensor bracket (bracket)
31: 1st bracket 32: 2nd bracket (sensor support part)
33: Base part 34: Pair of column parts 34a: Base end part 34b: Tip part 40: Wheel speed sensor

Claims (2)

A sensor rotor that has a detected part on one side surface, is arranged so as to intersect with a rotating shaft of a wheel that rotates relative to a vehicle body, and is fixed to the rotating shaft;
A brake flange that is disposed away from the one side surface of the sensor rotor along the rotation axis and has a flange surface facing the one side surface of the sensor rotor, and is fixed to the vehicle body side;
A pair of pillars extending along the rotation axis from a base end part on the brake flange side to a tip part on the sensor rotor side, and a sensor support part for connecting the tip parts of the pair of pillar parts. A bracket fastened and fixed to the flange surface of the brake flange;
The bracket is fixed to a region between the pair of column portions of the sensor support portion, is opposed to a rotation locus of the detected portion of the sensor rotor, and the detected portion is substantially parallel to the rotation axis. for example Bei and the wheel speed sensor that detects the direction a, a,
The bracket includes a base portion that connects the base end portions of the pair of column portions,
The base portion of the bracket has at least two fastening and fixing portions fastened and fixed to the flange surface of the brake flange on the same arc centered on the rotation axis,
The wheel speed sensor mounting structure , wherein the base end portions of the pair of column portions of the bracket are arranged on the same arc as the two fastening and fixing portions between the two fastening and fixing portions . The wheel speed sensor mounting structure according to claim 1,
The wheel speed sensor mounting structure, wherein the sensor support portion is formed separately from the pair of column portions and is fastened and fixed to the tip portions of the pair of column portions.

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