JP6002080B2 - Wheel speed detection mechanism - Google Patents

Description

  The present invention relates to an improvement in a wheel speed detection mechanism that detects a rotation speed of a wheel.

  In a motorcycle, a wheel speed is detected for ABS (anti-lock break system), vehicle body control, engine control, and vehicle speed display. A motorcycle equipped with such a wheel speed detection mechanism for detecting the wheel speed is known (see, for example, Patent Document 1 (FIG. 8)).

  As shown in FIG. 8 of Patent Document 1, in the wheel speed detection mechanism (80) (the numbers in parentheses indicate the symbols described in Patent Document 1. The same applies hereinafter), the wheel (14) is provided with a pulsar ring (52). The wheel speed sensor (60) is provided on the front fork (13) via the bracket 75. The wheel speed is detected by disposing the wheel speed sensor (60) so as to face the detected part of the pulsar ring (52).

  On the front wheel of the motorcycle, a wheel speed sensor (60) is arranged behind the front fork (13) in order to make it less susceptible to flying stones and the like.

  On the other hand, since the brake caliper (77) is disposed behind the front fork (13), the space between the front fork (13) and the brake caliper (77) is reduced, and the rear of the front fork (13). The position of the wheel speed sensor (60) is limited.

  Therefore, there is a need for a technique for improving the degree of freedom of arrangement of the wheel speed sensor arranged behind the front fork and ahead of the brake caliper provided behind the front fork.

JP 2001-165949 A

  It is an object of the present invention to provide a technique for improving the degree of freedom of arrangement of wheel speed sensors arranged behind a front fork and ahead of a brake caliper provided behind the front fork.

  According to a first aspect of the present invention, there is provided a pulsar ring that is provided on a wheel that is rotatably supported by a front fork and rotates with the wheel, and a wheel speed sensor that detects a detected portion that is supported by the front fork and formed in the pulsar ring. A brake caliper provided at the rear of the front fork, wherein the pulsar ring has an inclined surface with an outer peripheral portion inclined toward the inner side in the axle direction, and the detected portion is The wheel speed sensor is formed on the inclined surface and is inclined so as to face the detected portion, and is arranged behind the front fork axis and ahead of the brake caliper. It is characterized by that.

  The invention according to claim 2 is characterized in that the axle supporting the wheels of the front fork is offset forward with respect to the axis of the front fork.

  The invention according to claim 3 is characterized in that at least a part of the wheel speed sensor overlaps the front fork in a side view of the vehicle.

  The invention according to claim 4 is characterized in that the pulsar ring is formed by pressing a plate material.

  The invention according to claim 5 is characterized in that the inclination angle of the inclined surface is in the range of 30 ° or more and 60 ° or less with respect to the rotation surface of the pulsar ring.

  In the invention according to claim 1, the wheel speed sensor is arranged behind the front fork axis and ahead of the brake caliper. Since the wheel speed sensor is arranged behind the front fork, it is possible to prevent a stepping stone from the front with the front fork and protect the wheel speed sensor. Also, the rear of the wheel speed sensor can be protected by the brake caliper.

  In addition, the pulsar ring has an inclined surface whose outer peripheral portion is inclined toward the inner side in the axle direction, and the detected portion is formed on the inclined surface. Since the wheel speed sensor is arranged to be inclined so as to face the detected part, the detected part can be detected even in a narrow space between the front fork and the brake caliper. The degree of freedom in designing the sensor placement is improved.

  In the invention according to claim 2, the axle support portion that supports the wheel of the front fork is offset forward with respect to the axis of the front fork. Even in a so-called leading axle type vehicle where the space behind the front fork becomes narrower, according to the present invention, by arranging the wheel speed sensor to be inclined, it is possible to suppress an increase in the size of the pulsar ring, A wheel speed sensor can be arranged behind the front fork.

  In the invention according to claim 3, at least a part of the wheel speed sensor overlaps the front fork in a side view of the vehicle. Since the wheel speed sensor is arranged close to the front fork, the pulsar ring can be miniaturized and can be arranged compactly.

  In the invention which concerns on Claim 4, the pulsar ring is formed by pressing a board | plate material. Since only the plate material is pressed, the material cost and processing cost of the pulsar ring can be reduced.

  In the invention which concerns on Claim 5, the inclination angle of an inclined surface is the range whose inclination angle with respect to the rotating surface of a pulsar ring is 30 degrees or more and 60 degrees or less. If the inclination angle is less than 30 °, the outer diameter of the pulsar ring becomes large, and it is difficult to locate the pulsar ring between the front fork and the brake caliper. Also, if the inclination angle is larger than 60 °, the angle is steep and it is difficult to dispose the wheel speed sensor, and as it is arranged close to the rotation axis in the vertical direction, a space is required on the outer periphery of the pulsar ring. Assembling property also worsens. That is, by setting the inclination angle to 30 ° or more and 60 ° or less, the wheel speed sensor can be easily arranged while suppressing the outer diameter of the pulsar ring, and the advantage of the inclined surface can be enjoyed.

1 is a left side view of a motorcycle employing a wheel speed detection mechanism according to the present invention. It is a principal part enlarged view of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. It is an effect | action figure of the wheel speed detection mechanism which concerns on this invention. It is a figure explaining the other aspect of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG.

  Hereinafter, embodiments of the present invention will be described in detail. In the drawings and examples, “up”, “down”, “front”, “rear”, “left”, and “right” respectively indicate directions viewed from the driver who rides the motorcycle.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the motorcycle 10 includes a vehicle body frame 11, a power unit 21 that is swingably suspended from a rear portion of the vehicle body frame 11, and a vehicle body cover 31 that covers the vehicle body frame 11.

  The vehicle body frame 11 includes a head pipe 12, a main frame 13 that extends rearward and downward from the head pipe 12, and a seat rail 14 that extends rearward and upward from the rear end of the main frame 13.

  A front fork 16L (hereinafter, L is a subscript indicating the left and R is a subscript indicating the right) is supported on the lower portion of the head pipe 12 via the bottom bridge 15, and the front fork 16L is rotatable on the front wheel. 17 (wheel 17) is supported. A handle 18 for steering the front wheel 17 is provided on the upper portion of the head pipe 12, and a seat 19 on which an occupant is seated is provided on the upper portion of the seat rail 14.

  The power unit 21 includes an intake air cleaner 22, an exhaust muffler 23, and a rear wheel 24 as a drive wheel. A rear cushion 25 is provided between the power unit 21 and the seat rail 14, and the impact is absorbed by the rear cushion 25.

  The vehicle body cover 31 includes a front cover 32 that covers the front of the head pipe 12, a main frame cover 33 that covers the top of the main frame 13, a side cover 34 that covers the side of the main frame 13 in the vehicle width direction, and the seat rail 14. The rear cover 35 is covered. Further, the upper portion of the front wheel 17 is covered with a front fender 36, and the upper portion of the rear wheel 24 is covered with a rear fender 37.

  The motorcycle 10 includes a front brake device 40 that is provided on the front fork 16L and the front wheel 17 and brakes the front wheel 17, and a wheel speed detection mechanism 50 that is provided on the front fork 16L and the front wheel 17 and detects the wheel speed of the front wheel 17. Is provided.

Next, the main part according to the present invention will be described.
As shown in FIG. 2, the front brake device 40 includes a brake disc 41 provided on the front wheel 17 and rotating together with the front wheel 17, and a brake caliper 43 provided on the rear of the front fork 16L via a bracket 42 to brake the brake disc 41. And a brake hose 44 that is connected to the brake caliper 43 and sends brake fluid. The wheel speed sensor 53 may be directly attached to the front fork 16L without using the bracket 42.

  The bracket 42 is fastened by bolts 46 to bracket mounting portions 45a and 45b provided on the upper and lower sides of the front fork 16L. The brake disc 41 is fastened to the front wheel 17 by a bolt 47.

  The wheel speed detection mechanism 50 includes an annular pulsar ring 51 that is provided on the front wheel 17 and rotates together with the front wheel 17, a wheel speed sensor 53 that is provided on the front fork 16L via a bracket 42 and detects a detected portion 52 of the pulsar ring 51, And a cable 54 that is connected to the wheel speed sensor 53 and transmits detection information.

  The wheel speed sensor 50 has a sensor attachment portion 55, and the sensor attachment portion 55 is fastened to the bracket 42 by a bolt 56. The pulsar ring 51 is fastened to the front wheel 17 by a bolt 57.

  The front fork 16L is formed with an axle support portion 62L that supports the axle 61 on the lower front side. The axle support portion 62L is formed to bulge forward at the lower portion of the front fork 16L. Accordingly, the axle support 62L is offset forward with respect to the axis 63 of the front fork 16L. The front fork 16L is a so-called leading axle front fork 16L.

  The front wheel 17 is supported by the axle 61, and the axle 61 is fastened to the axle support portions 62L and 62R by nuts 64. The front wheel 17, the brake disc 41 and the pulsar ring 51 have the axle 61 coaxial. The outer diameter of the pulsar ring 51 is smaller than the outer diameter of the brake disc 41. The front end 58 of the wheel speed sensor 53 overlaps with the front fork 16L as viewed from the side of the vehicle.

Next, a main part according to the present invention will be described based on a cross-sectional view.
As shown in FIG. 3, the front wheel 17 is supported by a wheel 72 that is rotatably supported on an axle 61 via a bearing 71. Further, collars 74L and 74R provided between the wheel 72 and the left and right axle support portions 62L and 62R are passed through the axle 61.

  The pulsar ring 51 has a flat plate portion 65 on a flat plate attached to the wheel 72, and a conical shape (a truncated cone shape) extending outward in the width direction from the bent portion 65a where the outer peripheral edge of the flat plate portion 65 is bent outward in the radial direction. Of the inner inclined portion 66, an inclined surface 67 inclined so that the outer diameter increases from the outer peripheral portion of the inner inclined portion 66 toward the inner side in the direction of the axle 61, and a detection hole 52a as the detected portion 52 is formed in the inclined surface 67. It is formed.

  The wheel speed sensor 53 is attached to be inclined so as to face the inclined surface 67. For this reason, even when the outer diameter of the pulsar ring 51 is relatively small, the front end portion 58 of the wheel speed sensor 53 can be disposed in front of the rear end 75 of the front fork 16L. The detection hole 52a detected by the wheel speed sensor 53 overlaps the front fork 16L in a side view. That is, by tilting the wheel speed sensor 53, it can be extended to the inside of the front fork 16L. Even when the front fork 16L and the detection hole 52a overlap with each other when viewed from the side, the wheel speed sensor 53 is connected to the detection hole 52a of the pulsar ring 51. Can be moved to a detectable position.

  The inclination angle of the inclined surface 67 with respect to the rotation surface 68 of the pulsar ring 51 is α. The inclination angle α is preferably set in a range of 30 ° to 60 °.

  If the inclination angle α is less than 30 °, the direction of the wheel speed sensor 53 must be arranged close to the direction of the axle 61, and the front end 58 is located behind the rear end of the front fork 16L. Therefore, the outer diameter of the pulsar ring 51 tends to increase.

  Also, if the inclination angle α is larger than 60 °, the wheel speed sensor 53 must be arranged close to the direction perpendicular to the axle 61, and the clearance with the brake disc 41 tends to be narrowed. Decreases.

  Therefore, preferably, by setting the inclination angle α to 30 ° or more and 60 ° or less, the wheel speed sensor 53 can be easily arranged in a narrow space while suppressing an increase in the outer diameter of the pulsar ring 51, and the inclined surface. The merit of providing 67 can be enjoyed.

  The pulsar ring 51 is formed by pressing a plate material. For this reason, it is easy to form the inclined surface 67, and the pulsar ring 51 can be made inexpensive.

Next, the operation of the wheel speed detection mechanism 50 described above will be described.
FIG. 4A is a diagram for explaining a wheel speed detection mechanism 100 according to a comparative example. The axle support portion 102 of the front fork 101 is offset forward with respect to the axis 103 of the front fork 101. For this reason, the space between the front fork 101 and the brake caliper 104 behind it is narrow. The pulsar ring 105 is formed in a flat plate shape as a whole, and there is almost no space for disposing the wheel speed sensor 106.

  For this reason, the wheel speed sensor 106 is disposed in front of the front fork 101 having a large space. By extending a part of the front fender 107 shown by an imaginary line to the front of the wheel speed sensor 106, the wheel speed sensor 106 is protected from a stepping stone or the like from the front. Further, even when a part of the front fender 107 is not extended, a separate part for protecting the wheel speed sensor is required, which increases the number of parts, which is not preferable.

  In FIG. 4B, in the wheel speed detection mechanism 50 according to the embodiment, the axle support portion 62L of the front fork 16L is offset forward with respect to the axis 63 of the front fork 16L. For this reason, the space between the front fork 16L and the brake caliper 43 behind it is narrow. The outer peripheral portion of the pulsar ring 51 has an inclined surface 67 that is inclined so that the outer diameter increases toward the inner side in the direction of the axle 61.

  For this reason, a part of the wheel speed sensor 53 can be disposed so as to overlap the front fork 16L in a side view of the vehicle. Since the wheel speed sensor 53 is brought close to the front fork 16L, the wheel speed sensor 53 can be arranged even in a narrow space between the front fork 16L and the brake caliper 43. In addition, since the front of the wheel speed sensor 53 can be protected by the front fork 16L, there is no need to separately provide a cover part for protection, and the part cost can be reduced. In addition, the appearance can be improved.

Next, another aspect of FIG. 2 will be described. In addition, the same code | symbol is attached about the same structure as the structure shown in FIG. 2, and detailed description is abbreviate | omitted.
As shown in FIG. 5, the axle 61 that supports the front wheel 17 is disposed on the axis 63 of the front fork 16L. A brake caliper 43 is disposed behind the front fork 16L. A wheel speed sensor 53 is disposed behind the front fork 16L and in front of the brake caliper 43.

  The front of the wheel speed sensor 53 can be protected by the front fork 16L, and the rear of the wheel speed sensor 53 can be protected by the brake caliper 43. Since it is not necessary to separately provide a part for protecting the wheel speed sensor 53, the part cost can be reduced.

Next, another aspect of FIG. 3 will be described. In addition, the same code | symbol is attached about the same structure as the structure shown in FIG. 3, and detailed description is abbreviate | omitted.
As shown in FIG. 6, the axle 61 is supported by the lower ends of the front forks 16L and 16R. For this reason, the rear of the front fork 16L becomes a relatively wide space, and the degree of freedom of arrangement of the wheel speed sensor 53 is increased.

  Further, by changing the inclination angle α of the inclined surface 67 of the pulsar ring 51, the arrangement angle of the wheel speed sensor 53 can also be changed, and the degree of freedom in arrangement design can be further increased.

  In the embodiment, the wheel speed sensor is provided on the left side of the vehicle in the embodiment, but the wheel speed sensor may be provided on the right side of the vehicle. The pulsar ring may be formed of a sintered material or a machined material. Although the present invention is applied to a motorcycle in the embodiment, it can also be applied to a saddle-ride type four-wheeled vehicle, and is a vehicle equipped with a wheel speed detection mechanism that detects a detected part formed on a pulsar ring with a wheel speed sensor. If there is, it can be applied to general saddle riding type vehicles.

  The present invention is suitable for a motorcycle including a wheel speed detection mechanism that detects the rotational speed of a wheel.

  DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 16L, 16R ... Front fork, 17 ... Wheel (front wheel), 43 ... Brake caliper, 50 ... Wheel speed detection mechanism, 51 ... Pulsar ring, 52 ... Detected part, 53 ... Wheel speed sensor, 61 ... Axle 62L, 62R ... axle support, 63 ... axis of front fork, 67 ... inclined surface, α ... inclination angle.

Claims (5)

A pulsar ring (51) provided on a wheel (17) rotatably supported by the front fork (16L) and rotating together with the wheel (17);
A wheel speed sensor (53) for detecting a detected part (52) formed on the pulsar ring (51) supported by the front fork (16L), and a brake caliper (43) provided behind the front fork (16L) A wheel speed detection mechanism (50) comprising:
The pulsar ring (51) has an inclined surface (67) whose outer peripheral portion is inclined toward the inner side in the axle (61) direction,
The detected part (52) is formed on the inclined surface (67),
The wheel speed sensor (53) is disposed to be inclined so as to face the detected part (52), and is behind the axis (63) of the front fork (16L) and the brake caliper (43). A wheel speed detection mechanism characterized by being disposed further forward.   The axle (61) supporting the wheel (17) of the front fork (16L) is offset forward with respect to the axis (63) of the front fork (16L). Wheel speed detection mechanism.   The wheel speed detection mechanism according to claim 2, wherein at least a part of the wheel speed sensor (53) overlaps the front fork (16L) in a side view of the vehicle.   The wheel speed detection mechanism according to claim 2 or 3, wherein the pulsar ring (51) is formed by pressing a plate material.   The inclination angle (α) of the inclined surface is such that the inclination angle (α) with respect to the rotation surface of the pulsar ring (51) is in a range of 30 ° or more and 60 ° or less. The wheel speed detection mechanism according to claim 1.

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