JP6605365B2 - Arrangement structure of load measuring device for front wheel of motorcycle - Google Patents

Description

  The present invention relates to an arrangement structure of an electronic apparatus such as a load measuring device that measures a load on a front wheel of a motorcycle, such as a 6-component force meter side device.

  A motorcycle is a vehicle with complicated motion phenomena such as leaning, rolling, and pitching during driving. Such movement is often determined by an external force applied to the wheel. Therefore, by measuring such an external force (load), the operating state of the motorcycle can be grasped quantitatively, and vehicle development can be made more efficient. As a device for measuring such a force, there is a rotary component force measuring device that measures six component forces acting on a wheel (for example, Patent Document 1). The measurement device of Patent Literature 1 includes a rotation-side device supported by a rotating wheel and a fixed-side device that receives information from the rotation-side device.

Japanese Patent No. 4764619

  In motorcycles, both sides of the wheel are exposed, so if a stationary device is arranged on the side of the wheel, the air resistance particularly during high-speed running increases. As a result, it was difficult to measure the load acting on the wheel in a state close to the state where no measuring instrument is mounted around the front fender or the front wheel.

  An object of the present invention is to provide an arrangement structure of an electronic device such as a load measuring device for a front wheel of a motorcycle that can suppress an increase in air resistance during traveling.

  In order to achieve the above object, an arrangement structure of a load measuring device for a front wheel of a motorcycle according to a first configuration of the present invention includes: a rotation side device supported by the rotating wheel; At least a part of the fixed-side device is housed in a front fender that covers at least the upper part of the front wheel. The load measuring device is, for example, a component force meter that measures six component forces of the front wheel.

  According to this configuration, since at least a part of the fixed side device is housed in the front fender, the amount of traveling wind that collides with the fixed side device is reduced. The increase can be suppressed. In addition, since the rotation side apparatus supported by a wheel can be arrange | positioned inside the vehicle width direction of the tire of a wheel, it is hardly received to the influence of driving | running | working wind. Thus, in the arrangement structure of the load measuring device, the influence of traveling wind is suppressed even during high-speed traveling, and measurement can be performed in a state closer to a state in which no measuring instrument is mounted around the front fender or the front wheel. Measured values close to the state in which no measuring instrument is installed around the front fender or front wheel. By designing the vehicle body using such measurement values, vehicle development can be made more efficient.

  In the present invention, a bracket to which the front fender is attached is provided on an axle holder that supports the axle of the front wheel, and the front fender and the fixed-side device are attached to a common attachment portion provided on the bracket. Preferably it is. According to this configuration, since both the front fender and the stationary device are attached to the common attachment portion, the attachment structure of the load measuring device is simplified.

  In this case, it is preferable that the stationary device is supported so as to be displaceable in the axle direction and the radial direction of the front wheel with respect to the axle holder. Transmission of information from the rotation side device to the fixed side device is performed in a non-contact state. Therefore, the positional relationship between the rotation-side device and the fixed-side device, specifically, the positioning of the fixed-side device with respect to the rotation-side device is extremely important for ensuring the reliability of measurement. According to this configuration, since the fixed device is supported so as to be displaceable, the mounting position of the fixed device can be adjusted. As a result, it is possible to suppress a decrease in measurement accuracy due to component manufacturing errors, mounting errors, and the like, and it is possible to prevent measurement from being impossible due to inability to transmit information.

  When the fixed side device is supported so as to be displaceable, a first support member attached to the bracket and extending in a direction perpendicular to the axle direction, and a first support member attached to the fixed side device and extending in the axle direction. Two support members, a connector fitted to the first and second support members so as to be displaceable along the extending direction, and a single member for fastening the connector to the first and second support members It is preferable to provide a fastening member. According to this configuration, the position of the two directions can be adjusted with one fastening member, and the positions of the two directions can be defined simultaneously, so that the adjustment work of the mounting position of the fixed device is simple.

  When the first support member and the second support member are provided, the bracket has a main body portion extending along the front fork, and the first support member extends in parallel with the main body portion and is located inside the main body portion. Preferably, the first support member is housed in the front fork or the rear of the front fork. According to this configuration, since the fixed side member is disposed in front of or behind the front fork, the first support member that is a part of the fixed side member can be accommodated in the front fender without protruding in the vehicle width direction. . Further, when adjusting the position of the fixed side member, the tool can be easily accessed without interfering with the front fork, so that workability is good.

  In the present invention, the rotating device includes a strain detector that detects distortion of the wheel, an annular rotating antenna that transmits a signal detected by the strain detector to the fixed device in a non-contact manner, and the wheel. A fixed ring that receives a signal from the rotary antenna, and a rotation angle detector that reads the rotation angle of the rotary ring in a non-contact manner. It is preferable that the load measuring device further includes a signal processing unit that calculates the load based on a detection value of the strain detector and a detection value of the rotation angle detector. According to this configuration, the rotation detection device and the rotation angular velocity detection value are sent from the rotation device attached to the wheel to the fixed device in the front fender, and then these detections are detected from the fixed device to the signal processing unit. The value is sent and the load is calculated. Since the fixed-side device and the signal processing unit are connected by wire, the signal processing unit can be arranged at a position away from the fixed-side device. Thus, by providing the signal processing unit at a position away from the front wheels, it is possible to avoid contamination, damage, etc. of the signal processing unit.

  In this case, the rotating ring is preferably made of a black light shielding plate. In a motorcycle, since both sides of the wheel are exposed, when the rotation angle is detected optically, sunlight may be directly applied to the rotating ring. When sunlight is reflected on the rotating ring, the reliability of the detected value of the rotation angle is lowered. According to this configuration, since the rotating ring is made of a black light shielding plate, it is hardly affected by sunlight. Therefore, it can suppress that the reliability of the detected value of a rotation angle falls.

  Further, it is preferable that at least one of the rotating antenna and the rotating ring is disposed on the inner side in the vehicle width direction of the disc-shaped brake disc and on the inner diameter side of the outer peripheral edge of the brake disc. According to this configuration, the rotating antenna or the rotating ring is covered from the outside by the brake disc. In particular, the rotating ring is less susceptible to sunlight, so the reliability of the measurement value of the load measuring device is improved. In this case, the brake disc is provided on both sides of the front wheel, the rotating antenna is disposed on the inner side in the vehicle width direction of one brake disc, and the rotating ring is disposed on the inner side in the vehicle width direction of the other brake disc. Is particularly preferred.

  When the fixed-side device has the fixed antenna and the rotation angle detector, the fixed antenna is disposed on one side in the axial direction of the wheel, and the rotation angle detector is disposed on the other side. Is preferred. According to this configuration, it is easy to secure an arrangement space for the fixed antenna and the rotation angle detector.

  The arrangement structure of the load measuring device for the front wheel of the motorcycle according to the second configuration of the present invention is such that the load measuring device supplies power to the rotating device supported by the rotating wheel and the rotating device. And at least a part of the stationary device is housed in a front fender that covers at least the upper part of the front wheel.

  According to this configuration, electric power can be supplied from the outside to the rotation side device without contact. In addition, it is preferable to arrange such power supply means near the rotation side device, but according to this configuration, since the power supply means is housed in the front fender, The amount of traveling wind that collides with the power supply means is reduced. Thereby, the raise of the aerodynamic resistance by having provided the load measuring device can be suppressed. As a result, even when traveling at high speeds, the influence of traveling wind is suppressed, and measurement is possible in a state close to the state where no measuring instrument is installed around the front fender or front wheel, so there is no measuring instrument around the front fender or front wheel. A measurement value close to the state of not wearing is obtained.

  In the motorcycle electronic device arrangement structure according to the present invention, at least a part of the electronic device provided in the motorcycle is housed in a front fender that covers at least the upper part of the front wheel. The electronic device is, for example, a vehicle speed sensor, a fixed device of the load measuring device, or the like. According to this configuration, since the electronic device is housed in the front fender, the traveling wind that flows on the side of the wheel flows rearward along the front fender. As a result, the collision of the traveling wind with the electronic device is mitigated, so that an increase in aerodynamic resistance due to the provision of the electronic device can be suppressed.

  According to the arrangement structure of the load measuring device for the front wheel of a motorcycle according to the present invention, the influence of the traveling wind is suppressed even during high-speed traveling, and in a state close to a state in which no measuring instrument is mounted around the front fender or the front wheel. Since measurement is possible, a measurement value close to a state in which no measuring instrument is mounted around the front fender or the front wheel can be obtained.

1 is a side view showing a motorcycle provided with an arrangement structure of a load measuring device for a front wheel according to a first embodiment of the present invention. Fig. 3 is a side view showing a front portion of the motorcycle. Fig. 2 is a front view showing the same motorcycle. Fig. 3 is a front view showing a state in which a part of the motorcycle is omitted. It is a front view which expands and shows a part of the load measuring device part. It is a front view which expands and shows another part of the load measuring device part. It is sectional drawing which shows the fixed side apparatus of the load measuring device part, and the support structure of the said front fender. It is a front view which shows the slide structure of the fixed side apparatus. It is the perspective view seen from the vehicle width direction outer side diagonally back which shows the support structure of the fixed side apparatus. It is a block diagram of the load measuring device.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the present specification, “left side” and “right side” refer to the left and right sides as viewed from the driver who gets on the vehicle.

  FIG. 1 is a side view of a motorcycle having an arrangement structure of a load measuring device for a front wheel according to a first embodiment of the present invention. A body frame FR of the motorcycle has a main frame 1 that forms a front half and a rear frame 2 that forms a rear half. A head pipe 4 is provided at the front end of the main frame 1, and a pair of left and right front forks 8 are pivotally supported on the head pipe 4 via a steering shaft (not shown). A steering handle 6 is fixed to the upper end portion of the front fork 8, and a front wheel 10 is attached to the lower end portion of the front fork 8. A brake lever 50 (FIG. 2) and a master cylinder 52 described later are attached to the right handle 6.

  A swing arm bracket 9 is provided at the rear end of the main frame 1. A swing arm 12 is pivotally supported around a pivot shaft 16 attached to the swing arm bracket 9 so as to be swingable up and down. A rear wheel 14 is rotatably supported at the rear end of the swing arm 12. An engine E is attached to the front side of the swing arm bracket 9 below the main frame 1. The engine E drives the rear wheel 14 via the drive chain 11.

  A fuel tank 15 is disposed on the upper part of the main frame 1, and a rider's seat 18 and a passenger's seat 20 are supported on the rear frame 2. A resin cowling 24 that covers a portion from the front of the head pipe 4 to the outer side of the front of the engine E is attached to the front of the vehicle body.

  An axle holder 28 that rotatably supports the axle 10 a of the front wheel 10 is attached to the lower end of each front fork 8. A front fender 30 that covers at least the upper part of the front wheel 10 is attached to the axle holder 28. In the present embodiment, the front fender 30 covers the upper part and the upper rear part of the front wheel 10. The front fender 30 includes a fender body portion 32 that covers the upper portion of the front wheel 10 and the upper rear portion, and a pair of left and right supported portions 34 that are positioned in front of the front fork 8 and supported by the axle holder 28. .

  The fender main body 32 is provided to prevent deposits attached to the front wheel 10 from jumping in the radial direction. The supported portion 34 extends in the vertical direction and is connected to the fender body portion 32 at the upper portion. The left supported part 34 is connected to the left part of the fender body part 32, and the right supported part 34 is connected to the right part of the fender body part 32. Thereby, the front fender 30 is formed in a U shape in which a cross-sectional shape by a plane including the rotation axis of the front wheel 10 and the axis of the front fork 8 is opened downward. The support structure of the front fender 30 will be described later.

  The front wheel 10 includes a wheel 36 rotatably supported on the axle 10a, and a rubber tire 38 attached to an outer peripheral portion of the wheel 36. The wheel 36 is made of, for example, an aluminum alloy, and a hub 40 rotatably supported on the axle 10a via a wheel bearing (not shown), and an annular shape that constitutes an outer edge portion of the wheel 36 and holds a tire 38. And a plate-like spoke plate 44 for connecting the hub 40 and the rim 42 to each other. A plurality of (six in this embodiment) spoke plates 44 are provided at equal intervals in the circumferential direction.

  On both sides of the wheel 36, a pair of left and right disc-shaped brake disks 46L, 46R are provided. Each brake disk 46L, 46R is fixed to the wheel 36 and rotates together with the wheel 36. A brake caliper 48 is disposed behind the axle holder 28 of the front fork 8 and is supported by the axle holder 28. The brake caliper 48 is connected to the master cylinder 52 via a hydraulic hose 48a. When the brake lever 50 of the right handle 6 shown in FIG. 2 is gripped, hydraulic pressure is generated in the master cylinder 52. With this hydraulic pressure, a brake pad (not shown) held by the brake caliper 48 is pressed against the brake disks 46L and 46R. As a result, the kinetic energy of the motorcycle is converted into thermal energy, and the motorcycle is braked.

  The motorcycle according to this embodiment includes a load measuring device 55 that measures the load on the wheel 36 of the front wheel 10. The load measuring device 55 includes an electronic device provided on the front wheel 10. The load measuring device 55 of the present embodiment is a 6-component force meter that measures 6-component force acting on the wheel 36 of the front wheel 10. The six-component force meter has six values: three forces acting on the center of gravity of the wheel 36 in the front-rear direction, up-down direction, and left-right direction, and three forces acting around the front-rear axis, the up-down axis, and the left-right direction. measure. 1 and 2, the load measuring device 55 is drawn with a two-dot chain line.

  FIG. 3 is a front view of the motorcycle, and FIG. 4 is a front view in which most of the front wheels 10 are omitted from FIG. As shown in FIG. 4, the load measuring device 55 includes a rotation-side device 56 supported by the rotating wheel 36, and a fixed-side device 58 that receives information from the rotation-side device 56 and is fixed to the axle holder 28. Have

  The stationary device 58 is disposed in proximity to the rotation device 56. Transmission of information from the rotation-side device 56 to the fixed-side device 58 is performed in a non-contact manner using radio wave signals. Therefore, the positional relationship between the rotation-side device 56 and the fixed-side device 58, specifically, positioning of the fixed-side device 58 with respect to the rotation-side device 56 is extremely important for ensuring measurement reliability.

  The rotation side device 56 includes a distortion detector 64 that detects the distortion of the wheel 36, and an annular rotation antenna 66 that outputs a signal detected by the distortion detector 64 as a radio wave signal and transmits the signal to the fixed side device 58 without contact. And a disk-shaped rotating ring 68 that rotates integrally with the wheel 36. The strain detector 64 is attached to the wheel 36 via a sensor attachment member 70. The sensor mounting member 70 is fixed to the wheel 36 by a plurality of bolts (not shown).

  The rotating antenna 66 is fixed to the right side surface of the sensor mounting member 70. The sensor mounting member 70 is fixed to the wheel 36 via a plurality of bolts, and rotates integrally with the wheel 36. That is, the rotating antenna 66 also rotates together with the wheel 36. The rotating ring 68 is made of a black light shielding plate. That is, the rotation ring 68 is formed with a light reflection suppressing layer that suppresses light reflection as a surface layer. The surface layer of the rotating ring 68 may be painted with a low brightness such as black, or may be subjected to a surface treatment that scatters light such as matte. The rotating ring 68 is disposed on the left side of the sensor mounting member 70 and is fixed to the hub 40.

  The rotating antenna 66 is disposed on the inner side in the vehicle width direction of the right brake disc 46R, and the rotating ring 68 is disposed on the inner side in the vehicle width direction of the left brake disc 46L. The rotary antenna 66 and the rotary ring 68 are disposed on the inner diameter side of the outer peripheral edges of the brake disks 46L and 46R. That is, the outer diameters of the rotating antenna 66 and the rotating ring 68 are set to be smaller than the outer diameters of the brake disks 46L and 46R. The rotating antenna 66 and the rotating ring 68 are disposed on the inner side in the vehicle width direction of the both outer edges 38a, 38a of the tire 38 in a front view. At least one of the rotating antenna 66 and the rotating ring 68 is preferably arranged on the inner side in the vehicle width direction of the rim 42 in a front view, and more preferably both are arranged on the inner side in the vehicle width direction of the rim 42.

  The fixed-side device 58 includes a fixed antenna 78 that receives a radio signal from the rotating antenna 66 in a contactless manner, a power supply means 60 that transmits a driving radio wave to the rotating-side device 56 and supplies power in a contactless manner, and a fixed antenna. 78 and a fixed case 79 containing the power supply means 60. As shown in FIG. 5, the fixed case 79 is disposed in the vicinity of the upper portion of the rotating antenna 66 so as to face the upper portion of the rotating antenna 66 in the vehicle width direction. The fixed case 79 is disposed on the right side of the front wheel 10 and is supplied with electric power from the power supply line 101 connected to the connection port 79a shown in FIG. 9, and the signal is externally transmitted from the signal line 99 connected to the connection port 79b. Sent to the device. The signal line 99 and the power supply line 101 are disposed behind the fixed case 79. Thereby, it is possible to prevent a scattered object such as a pebble from colliding with the vicinity of the wiring.

  4 further includes a rotation angle detector 80 that is disposed on the left side of the front wheel 10 and reads the rotation angle of the rotation ring 68 in a non-contact manner. That is, the fixed case 79 is disposed at a position close to and opposed to the rotating antenna 66, and the rotation angle detector 80 is disposed at a position close to and opposed to the rotating ring 68.

  The rotation ring 68 is formed with a plurality of transmission holes 68a (FIG. 6) located concentrically with the front wheel 10. The rotation angle detector 80 having a light emitting element and a light receiving element counts the optical signal that has passed through the transmission hole 68a, and detects the rotation angular velocity of the front wheel 10. The shape of the transmission hole 68a is, for example, a rectangle with a corner R. Electric power is supplied to the rotation angle detector 80 from the connection port 80a.

  In order to increase the detection accuracy, the rotating ring 68 is set to have a larger number of counts per round than a normal vehicle speed sensor. In the present embodiment, the count number per round is set as follows. Most of the front wheel 10 is exposed on both sides in the vehicle width direction, and sunlight is likely to enter the rotating ring 68 as compared to a four-wheeled vehicle exposed only on one side in the vehicle width direction. The rotation ring 68 detects the rotation angle from the reference position by counting the optical signal from the reference position. The reference position set on the rotating ring 68 is configured to correspond to the reference position of the wheel 36 to which the strain detector 64 is attached. As a result, a strain detection value at the hole angle position can be obtained, and calculation of six component forces is possible.

  As shown in FIG. 6, the rotation angle detector 80 is formed in a U-shape that opens downward in a front view, and the light receiving unit 80 b and the light emitting unit 80 c sandwich the rotation ring 68 in the vehicle width direction. Opposite. An optical signal emitted from the light emitting unit 80c passes through the transmission hole 68a and enters the light receiving unit 80b. By arranging the light receiving unit 80b on the outer side in the vehicle width direction, it is possible to suppress the sunlight from irradiating the optical signal incident on the light receiving unit 80b. The light receiving unit 80 b and the light emitting unit 80 c are disposed close to the fender body 32, that is, close to the upper end of the rotating ring 68. Thereby, it is easy to shield sunlight with the fender main body 32 and the supported part 34, and compared with the case where it arrange | positions in another part, irradiation of the sunlight to the light-receiving part 80b can be suppressed. In addition, the light receiving unit 80b and the light emitting unit 80c can be prevented from being damaged due to adhesion of muddy water or the like by being disposed at the upper part.

  As shown in FIG. 10, the power supply means 60 in the fixed case 79 supplies power to the strain detector 64 and the rotation antenna 66 of the rotation side device 56 in a non-contact manner. For example, the power supply unit 60 transmits power to the power receiving unit 45 on the rotation side device 56 side by electromagnetic induction via a coil. The load measuring device 55 further includes a signal processing unit 62 that calculates a load that acts on the wheel 36 based on information received by the stationary device 58. The signal processing unit 62 is disposed at a position away from the stationary device 58, for example, inside the cowling 24 or below the rider's seat 18.

  Next, a structure for supporting the fixed case 79 including the fixed antenna 78 and the power supply means 60 and the rotation angle detector 80 on the vehicle body will be described. The fixed case 79 and the rotation angle detector 80 are supported by the axle holder 28 in FIG. 1 so that the displacement can be adjusted in the axial direction and the radial direction of the front wheel 10. As a representative, the support structure of the fixing case 79 on the right side of the vehicle body will be described. A bracket 82 is provided on the axle holder 28. The bracket 82 has a main body portion 85 extending along the front fork 8. The bracket 82 is integrally formed with the axle holder 28. The supported portion 34 on the right side of the front fender 30 and the fixed case 79 are attached to a common attachment portion 84 provided on the bracket 82.

  The attachment portion 84 is formed of a screw hole extending through the bracket 82 in the vehicle width direction, and two attachment portions 84 are formed side by side in the longitudinal direction of the bracket 82. As shown in FIG. 7, the supported portion 34 of the front fender 30 is disposed outside the bracket 82 in the vehicle width direction, and a bolt insertion hole 34 a is formed in the supported portion 34. A bolt 86 is inserted from the outside in the vehicle width direction into the bolt insertion hole 34 a and is fastened to the screw hole 84 of the bracket 82. Thereby, the front fender 30 is supported by the axle holder 28.

  On the other hand, a first support member 90 is disposed on the inner side in the vehicle width direction of the bracket 82, and a bolt insertion hole 78 a is formed in the first support member 90. A bolt 88 is inserted into the bolt insertion hole 78a from the inner side in the vehicle width direction and is tightened into the screw hole 84 of the bracket 82. As a result, the first support member 90 is supported by the axle holder 28.

  As shown in FIG. 8, a fixed case 79 is supported by the first support member 90 via a connector 94 and a stay 93 having a second support member 92 extending in the axle direction (vehicle width direction). Yes. The connector 94 is fitted to the first and second support members 90 and 92 so as to be displaceable along the extending direction thereof. The first and second support members 94 are supported at a desired position by a single fastening member 95. It is fixed to the members 90 and 92. The fastening member 95 is disposed so as to be operable from the front of the vehicle body. A fixing case 79 is connected to the stay 93 by a fastening member 97 composed of two bolts. The first support member 90, the second support member 92, the stay 93, and the coupling tool 94 constitute a fixed-side device 58 together with the fixed case 79.

  The first support member 90 extends in a direction orthogonal to the axle direction (vehicle width direction). Specifically, the first support member 90 extends in a substantially vertical direction D1 parallel to the main body portion 85 of the bracket 82. On the other hand, the second support member 92 extends in the axle direction D2. The first support member 90 is disposed in front of the front fork 8.

  As shown in FIG. 9, the connector 94 includes a first connecting portion 96 having a first insertion hole 96a through which the first support member 90 is inserted, and a second insertion hole 98a through which the second support member 92 is inserted. And a second connecting portion 98 having the same. Slots 96b and 98b are formed in the first and second connecting portions 96 and 98, respectively. The diameter of each insertion hole 96a and 98a is increased by loosening the fastening member 95, and the diameter is reduced by tightening. Is configured to do. Therefore, when the fastening member 95 is loosened, the fixed case 79 slides in the vertical direction D1 and the vehicle width direction D2 along the first and second support members 90 and 92. By tightening the fastening member 95 at a desired position, both the connecting portions 96 and 98 are firmly connected to the first and second support members 90 and 92 and positioned.

  The fastening member 95 is disposed so as to be displaced in the front-rear direction with respect to the front fork 8. Thereby, interference with a tool and the front fork 8 can be prevented, and positioning can be performed easily. In particular, by being arranged in front of the front fork 8, it is easy to operate from the front of the front wheel 10 and workability is improved. Further, when the fastening member 95 is disposed on the inner side in the vehicle width direction with respect to the front fender 30 in front view, the interference with the front fender 30 is prevented, and the tool can be easily accessed to the fastening member 95. Furthermore, it is preferable that the fastening member 95 is disposed between the front fender 30 and the front wheel 10 in the vehicle width direction and exposed forward in a front view.

  8 and 9, the sliding structure of the fixed antenna 78 on the right side of the vehicle body is shown, but the sliding structure of the rotation angle detector 80 on the left side of the vehicle body, that is, the positioning structure of the rotation angle detector 80 with respect to the rotation ring 68 is the same. is there.

  As is apparent from FIGS. 1 to 3, at least a part of the stationary device 58 constituting the load measuring device 55 that is an electronic device is housed in the front fender 30. Specifically, the entire stationary device 58 including the stationary case 79 on the right side of the front wheel 10 and the rotational angle detector 80 on the left side is covered with the supported portion 34 of the front fender 30 in a side view. A part of the fixed side device 58, in this embodiment, the entire first support member 90, the second support member 92, and a part of the connector 94 are covered with the supported portion 34 of the front fender 30 in a front view. It has been broken. The stay 93 and most of the fixed case 79 and the rotation angle detector 80 are located inside the tire 38 in a front view.

  When the right brake disc 46R is not provided, the fixed case 79 can be moved outside to accommodate the entire fixed side device 58 in the supported portion 34 of the front fender 30. Similarly, for the rotation angle detector 80, when the left brake disc 46L is not provided, the rotation angle detector 80 is moved outwards so that the entire fixed device 58 is supported by the supported portion 34 of the front fender 30. It can also be stored.

  Next, the operation of the load measuring device 55 will be described. While the motorcycle of FIG. 1 is traveling, distortion occurs in the wheel 36 of the front wheel 10. Such distortion is detected by a distortion detector 64 shown in FIG. The distortion detected by the distortion detector 64 is transmitted to the fixed antenna 78 in the fixed case 79 through the rotating antenna 66 in a non-contact manner. The distortion detection value sent to the fixed antenna 78 is sent to the signal processing unit 62 via the signal line 99.

  On the other hand, the rotation angle detector 80 reads the angular velocity of the rotation ring 68 rotating with the wheel 36 (FIG. 1) in a non-contact manner. The angular velocity detected by the rotation angle detector 80 is sent to the signal processing unit 62 in FIG.

  The signal processing unit 62 includes, for example, an arithmetic processing unit, and calculates a load acting on the wheel 36, that is, a six component force based on the detection value of the distortion detector 64 and the detection value of the rotation angle detector 80. Specifically, the signal processing unit 62 has a function 100 in which the relationship between the wheel distortion and rotation angle and the six component forces is recorded, and the distortion detection value and rotation angle detection input to the signal processing unit 62. A 6 component force is estimated from the value and this function 100. The function 100 is created by simulation, experiment, etc. and stored in the signal processing unit 62. This calculation of the six component forces is known, and is described in, for example, Japanese Patent No. 4764619.

  According to the above configuration, a part of the fixed-side device 58 shown in FIG. 3, specifically, the first support member 90, the coupling tool 94, and the like are housed in the supported portion 34 of the front fender 30. Accordingly, the traveling wind flowing backward on the side of the front wheel 10 is mitigated from colliding with the first support member 90 and the connecting tool 94, and therefore, the increase in aerodynamic resistance due to the load measuring device 55 can be suppressed. it can.

  In addition, since the wheel 36 on which the rotation-side device 56 is disposed does not have a power supply source, it is necessary to supply power to the rotation-side device 56 from the outside without contact. In the present embodiment, since the power supply means 60 is provided in the fixed case 79 of the fixed device 58, the power supply means 60 is also supported by the vehicle body via the first support member 90, the connector 94, and the like. . Therefore, an increase in aerodynamic resistance due to the provision of the power supply means 60 can be suppressed.

  Further, since the strain detector 64, the rotating antenna 66 and the rotating ring 68 supported by the wheel 36 are disposed on the inner side in the vehicle width direction of the outer edges 38a of the tire 38 of the front wheel 10, the influence of the traveling wind is little. I do not receive it. As described above, in the arrangement structure of the load measuring device 55 of the present embodiment, the influence of the traveling wind is suppressed even during high-speed traveling, and measurement is performed in a state close to a state in which no measuring instrument is mounted around the front fender 30 or the wheel 36. Since it is possible, a measurement value (distortion detection value, rotation angle detection value) close to a state in which no measuring instrument is mounted around the front fender 30 or the wheel 36 can be obtained. As a result, the calculation accuracy of the load (six component force) acting on the wheel 36 is improved. The vehicle development can be made more efficient by designing the vehicle body based on such measurement results using 6 component forces.

  Further, the front fender 30, the fixed antenna 78 (fixed case 79), and the rotation angle detector 80 are mounted on a common mounting portion 84 provided on the axle holder 28. As described above, the mounting structure of the load measuring device 55 is obtained by attaching the front fender 30, the fixed antenna 78, and the rotation angle detector 80 to the common attachment portion 84, as compared with the case where the attachment portion dedicated to the electronic device is formed. Becomes easier. Further, by using the bracket 82 in common, an increase in the unsprung weight of the front fork 8 can be suppressed as compared with a case where a bracket is separately provided.

  The fixed antenna 78 and the rotation angle detector 80 are supported to be displaceable in the axle direction (vehicle width direction) and the radial direction of the front wheel 10 with respect to the axle holder 28. Transmission of information from the rotation-side device 56 to the fixed-side device 58 is performed in a non-contact state. Therefore, the positional relationship between the rotation-side device 56 and the fixed-side device 58, specifically, the positioning of the fixed-side device 58 with respect to the rotation-side device 56 is extremely important for ensuring the reliability of the measurement value. Further, since the wheel 36 on which the rotation-side device 56 is disposed does not have a power supply source, it is necessary to supply power to the rotation-side device 56 from the outside without contact. Such a power supply means 60 and the rotation-side device The positional relationship with 56 is also very important.

  In the arrangement structure of the load measuring device 55 of the present embodiment, the fixed antenna 78, the rotation angle detector 80, and the power supply means 60, which are the fixed side devices 58, are supported so as to be displaceable. The mounting positions of the device 80 and the power supply means 60 can be adjusted. As a result, it is possible to suppress a decrease in measurement accuracy due to component manufacturing errors, mounting errors, and the like, and it is avoided that measurement cannot be performed due to inability to transmit information.

  Since the fixed antenna 78 shown in FIG. 5 is provided so as to be adjustable in the vertical direction and the vehicle width direction, the fixed antenna 78 can be disposed at a position that prevents contact while approaching the radio wave transmission surface of the rotating antenna 66. Similarly, the rotation angle detector 80 shown in FIG. 6 can be disposed at a position to prevent contact while being close to the transmission hole 68 a of the rotation ring 68.

  As shown in FIG. 9, the fixed case 79 incorporating the fixed antenna 78 and the power supply means 60 has a configuration in which the position can be adjusted in the two directions of the vertical direction D1 and the vehicle width direction D2 with a single fastening member 95. ing. Therefore, the adjustment work of the mounting positions of the fixed antenna 78 and the power supply means 60 is simplified.

  A first support member 90 shown in FIG. 8 extends parallel to the front fork 8 and is disposed in front of the front fork 8. Thereby, the fixed case 79 and the rotation angle detector 80 can be accommodated in the front fender 30 without protruding outward in the vehicle width direction. Further, when the positions of the fixed case 79 and the rotation angle detector 80 are adjusted, the fastening member 95 can be easily accessed from the front without interfering with the front fork 8, so that workability is good.

  A strain detector 64 and a rotating antenna 66 are attached to the wheel 36 via a sensor attachment member 70. As a result, the load acting on the wheel 36 can be measured with a robust structure.

  The rotating ring 68 is made of a black light shielding plate. In the motorcycle, since both sides of the front wheel 10 are exposed, sunlight may be directly applied to the rotating ring 68. The rotation angle is detected by the rotation angle detector 80 reading the optical signal that has passed through the transmission hole 68a of the rotation ring 68 in a non-contact manner. Therefore, when sunlight is reflected on the rotation ring 68, the detected value of the rotation angle is detected. Reliability decreases. In the said structure, since the rotation ring 68 consists of a black light shielding board, it is hard to receive to the influence of sunlight. Therefore, it can suppress that the reliability of the detected value of a rotation angle falls.

  Further, the rotating ring 68 is disposed on the inner side in the vehicle width direction of the brake disc 46L shown in FIG. 4 and on the inner diameter side of the outer peripheral edge of the brake disc 46L. As a result, the rotating ring 68 is covered from the outside by the brake disk 46L, so that it is less susceptible to the influence of sunlight. As a result, the reliability of the detected value of the rotation angle is improved. In the above embodiment, the brake discs 46L and 46R are provided on both sides of the front wheel 10, the rotating antenna 66 is disposed on the inner side in the vehicle width direction of the right brake disc 46R, and rotates on the inner side in the vehicle width direction of the left brake disc 46L. A ring 68 is arranged. Therefore, not only the rotating ring 68 but also the rotating antenna 66 is protected by the brake disk 46L.

  A fixed antenna 78 is disposed on one side (right side) of the wheel 36 in the axle direction, and a rotation angle detector 80 is disposed on the other side (left side). Thereby, compared with the case where both are arrange | positioned at one side, the arrangement space of the fixed antenna 78 and the rotation angle detector 80 can be ensured easily.

  The arrangement structure of the above embodiment can be applied to a load measuring device other than the 6-component force meter, and can also be applied to electronic devices other than the load measuring device. A part of the electronic device is disposed inside a portion of the front fender 30 that faces the axial direction of the wheel. Specifically, the front fender 30 has a mudguard portion (fender main body portion 20) that covers the upper side of the wheel and a supported portion 34, and a connected portion 34b that is connected to the mudguard portion is formed in the supported portion 34. Has been. The connecting portion 34b is formed in a shape in which the inner surface in the vehicle width direction bulges outward in the vehicle width direction. A part of the electronic device is arranged inside the swelled supported portion 34.

  The supported portion 34 may be disposed in front of the front fork 8 to protect the front fork 8. When the front fork 8 is an inverted fork in which the inner tube is disposed at the lower part of the outer tube, the connecting portion 34b functions as a part of a protective member that protects the inner tube portion. The supported portion 34 includes an inclined wall 34c whose cross section perpendicular to the vertical direction is inclined inward in the vehicle width direction toward the front. The electronic device is disposed behind the inclined wall 34c. Therefore, at least a part of the electronic device is covered with the inclined wall 34c in front view.

  The electronic device may be an electronic device provided in the vicinity of the wheel other than the load measuring device, for example, a vehicle speed sensor. In the case of a vehicle speed sensor, it can be applied to a known sensor such as a magnetic pulse detection type and a concavo-convex shape detection type in addition to the optical pulse detection type. Moreover, the electronic device which supplies drive electric power to the sensor provided in the wheel side and an actuator may be sufficient. Moreover, the electronic device which supplies drive electric power from the apparatus provided in the wheel side may be sufficient. Furthermore, the electronic device which inputs / outputs the information (sensor signal, drive command signal, etc.) with respect to the apparatus provided in the wheel side may be sufficient. Alternatively, the arrangement structure of the present invention can also be applied to an electronic device that transmits and receives radio waves to and from the outside of the vehicle, such as ETC (electronic toll collection system) and GPS (global positioning system).

  The present invention is not limited to the above-described embodiment, and various additions, modifications, or deletions can be made without departing from the gist of the present invention. For example, in the above-described embodiment, both the rotating antenna 66 and the rotating ring 68 are disposed on the inner side in the vehicle width direction of the brake disks 46L and 46R, but at least one of the rotating antenna 66 and the rotating ring 68, for example, the rotating ring 68 is used. Need only be placed inside. Moreover, the common attachment part 84 shown in FIG. 7 is not limited to a screw hole, and the slide mechanism of FIG. 8 is not limited to the structure of the said embodiment. Further, the first support member 90 may be disposed behind the front fork 8. In this case, the fixed fork device may be protected by the front fork 8, and the electronic device may be supported by the brake caliper 48 or its bracket.

  The arrangement structure of the present invention can be applied not only to a test vehicle but also to a vehicle other than the test vehicle, for example, a commercial vehicle. In addition to the supported portion 34 of the front fender 30, an electronic device may be housed inside the fender body portion 32. When the brake disk of the front wheel 10 is provided only on one side, it is preferable to arrange the rotating ring 68 on one side of the wheel 36. Thereby, it can suppress that sunlight irradiates the rotation ring 68. FIG.

  In the above embodiment, the fixed antenna 78 is disposed on the right side of the wheel 36 in FIG. 3 and the rotation angle detector 80 is disposed on the left side. However, the rotation angle detector 80 is disposed on the right side and the fixed antenna 78 is disposed on the left side. May be arranged. Further, the fixed antenna 78 and the power supply means 60 may be provided separately. Therefore, such a thing is also included in the scope of the present invention.

8 Front fork 10 Front wheel 10a Front wheel axle 28 Axle holder 30 Front fender 36 Wheel 46L, 46R Brake disc 55 Load measuring device (6 component force meter)
56 Rotation side device 58 Fixed side device 60 Power supply means 62 Signal processing unit 64 Strain detector (Rotation side device)
66 Rotating antenna (rotating device)
68 Rotating ring (rotary device)
78 Fixed antenna (fixed side equipment)
80 Rotation angle detector (fixed side equipment)
82 Bracket 84 Common mounting part (screw hole)
85 bracket body 90 first support member 92 second support member 94 connector 95 single fastening member

Claims (10)

An arrangement structure of a load measuring device for measuring a load on a wheel of a front wheel of a motorcycle,
The load measuring device includes a rotation-side device supported by the rotating wheel, and a fixed-side device that acquires information from the rotation-side device,
At least a part of the stationary device is housed in a front fender that covers at least the front wheel.
The axle holder that supports the axle of the front wheel is provided with a bracket to which the front fender is attached,
An arrangement structure of a load measuring device for a front wheel of a motorcycle in which the front fender and the stationary device are attached to a common attachment provided on the bracket . 2. The arrangement structure according to claim 1 , wherein the stationary device is supported so as to be displaceable in the axial direction and the radial direction of the front wheel with respect to the axle holder. . The arrangement structure according to claim 2 , further comprising: a first support member attached to the bracket and extending in a direction perpendicular to the axle direction; and a second support member attached to the stationary device and extending in the axle direction. A coupling tool fitted to the first and second support members so as to be displaceable along the extending direction; and a single fastening member for fastening the coupling tool to the first and second support members. Arrangement structure of load measuring device for front wheel of motorcycle. The arrangement structure according to claim 3 , wherein the bracket has a main body portion extending along a front fork,
The first support member extends parallel to the main body portion and is housed inside the main body portion;
An arrangement structure of a load measuring device for a front wheel of a motorcycle, wherein the first support member is arranged in front of or behind a front fork. The arrangement of the load measuring device for a front wheel of a motorcycle according to any one of claims 1 to 4 , wherein the load measuring device is a force meter that measures six component forces of the wheel of the front wheel. Construction. An arrangement structure of a load measuring device for measuring a load on a wheel of a front wheel of a motorcycle,
The load measuring device includes a rotation-side device supported by the rotating wheel, and a fixed-side device that acquires information from the rotation-side device,
At least a part of the stationary device is housed in a front fender that covers at least the front wheel.
The rotation-side device rotates integrally with the wheel, a strain detector that detects distortion of the wheel, an annular rotation antenna that transmits a signal detected by the strain detector to the fixed-side device in a non-contact manner, and A rotating ring,
The fixed side device has a fixed antenna that receives a signal from the rotating antenna, and a rotation angle detector that reads the rotation angle of the rotating ring in a non-contact manner,
The load measuring device further includes an arrangement of a load measuring device for a front wheel of a motorcycle including a signal processing unit that calculates the load based on a detection value of the strain detector and a detection value of the rotation angle detector. Construction. The arrangement structure according to claim 6 , wherein the rotating ring is a black light shielding plate and a load measuring device for a front wheel of a motorcycle. The arrangement structure according to claim 6 or 7 , wherein at least one of the rotating antenna and the rotating ring is disposed on the inner side in the vehicle width direction of the disc-shaped brake disc and has an inner diameter that is greater than an outer peripheral edge of the brake disc. Arrangement structure of load measuring device for front wheel of motorcycle arranged on side. The arrangement structure according to any one of claims 6 to 8 , wherein the fixed antenna is arranged on one side in the axial direction of the wheel, and the rotation angle detector is arranged on the other side. Arrangement structure of load measuring device for front wheel. An arrangement structure of a load measuring device for measuring a load on a wheel of a front wheel of a motorcycle,
The load measuring device includes a rotation-side device supported by the rotating wheel, and a fixed-side device including a power supply unit that supplies power to the rotation-side device,
An arrangement structure of a load measuring device for a front wheel of a motorcycle in which at least a part of the stationary device is housed in a front fender that covers at least the front wheel.

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