JP5037463B2 - Motorcycle with pressure sensor support structure - Google Patents

Description

  The present invention relates to a motorcycle including a pressure sensor support structure, and more particularly to a motorcycle including at least one of an antilock brake system and a front / rear interlocking brake system.

  As is well known, an anti-lock brake system for a motorcycle controls the brake fluid pressure to the caliper when the wheel is about to lock, and automatically controls braking of the brake disc by the caliper. It is a system that prevents the lock of the machine. The front-rear interlocking brake system is a system that also brakes the front wheels in conjunction with the braking of the rear wheels, for example, by operating a brake pedal.

The antilock brake system and the front / rear interlocking brake system include a hydraulic pressure control unit for controlling the brake hydraulic pressure to the caliper and a pressure sensor for detecting the brake hydraulic pressure. In these brake systems, the hydraulic pressure control unit controls the driving of the master cylinder with reference to the detected value of the brake hydraulic pressure obtained by the pressure sensor.
JP 2007-76554 A

  The pressure sensor is usually built in the fluid pressure control unit or fixed to a dedicated sensor port provided in the fluid pressure control unit. Here, from the viewpoint of sharing parts, a hydraulic control unit for a motorcycle may be diverted to a hydraulic control unit for a motorcycle. In such a case, the number of sensor ports is insufficient. This is because the number of pressure sensors required for a motorcycle brake system is usually greater than the number of pressure sensors required for a motorcycle brake system. Therefore, when a hydraulic control unit for a motorcycle is diverted to a hydraulic control unit for a motorcycle, it is necessary to provide a pressure sensor at a position other than the sensor port.

  Since the pressure sensor is a means for detecting the brake fluid pressure, the position of the pressure sensor may basically be anywhere on the brake fluid path. However, in order to arrange the pressure sensor, a joint for attaching the pressure sensor to the brake pipe, a bolt for fixing the joint, a nut for fixing the bolt, and a place for attaching the nut are required. That is, when the pressure sensor is provided at a position other than the sensor port, the number of parts and the layout space are increased.

  The object of the present invention is to reduce pressure on a motorcycle while suppressing an increase in the number of parts and layout space when a brake fluid pressure sensor cannot be attached to a sensor port of a hydraulic control unit for a brake system. This is a point that enables the sensor to be attached.

  1st invention is a motorcycle provided with the pressure sensor support structure for supporting the pressure sensor which detects a brake fluid pressure in at least one brake system of an anti-lock brake system and a front-and-rear interlocking brake system. A hydraulic pressure control unit for controlling the brake hydraulic pressure, a sensor joint in which the pressure sensor is connected to a brake pipe connection port of the hydraulic pressure control unit, and a brake pipe for the brake system The joint for piping connected to is tightened together using a bolt having a flow path for allowing fluid to pass through the screw shaft.

  The first invention preferably employs the following configuration (a).

(A) The sensor joint is disposed closer to the port than the piping joint.

  According to the first invention, the port also serves as a nut for fixing the sensor joint with the bolt. Thereby, it is not necessary to use another nut and to secure a place for attaching the nut. Therefore, it is possible to attach the pressure sensor to the motorcycle while suppressing an increase in the number of parts and layout space.

  Furthermore, according to the configuration (a), the pressure sensor is fixed at a position closer to the hydraulic pressure control unit. Therefore, the vibration generated in the motorcycle does not easily reach the pressure sensor, and the detection accuracy of the brake fluid pressure by the pressure sensor does not decrease.

[Configuration of this embodiment]
In FIG. 1, the vehicle body structure of the motorcycle A will be described. FIG. 1 is a diagram in which components other than the frame, such as an engine, a tank, and a seat, are omitted. The body structure of the motorcycle A includes a main frame F, left and right front forks 72 and 72, a swing arm 79, and other frames. A steering shaft (not shown) is rotatably supported on the head pipe 51 of the main frame F, and front forks 72 and 72 are fixed to the steering shaft via an upper bracket 52 and a lower bracket 53. The front forks 72, 72 support the front wheel 73 via the front axle 74 so as to be rotatable and support the front wheel 73 so as to be movable up and down. The swing arm 79 supports the rear wheel 93 through the rear axle 75 so as to be rotatable. The swing arm 79 is rotatably supported by the swing arm bracket 40 of the main frame F so as to swing up and down.

  The motorcycle A having the vehicle body structure shown in FIG. 1 is equipped with both an antilock brake system and a front / rear interlocking brake system. The hydraulic control unit 1 used in these brake systems is supported on an attachment plate 41 fixed to the main frame F via elastic members 46, 47 and 47.

  FIG. 2 shows an outline of the layout of the brake piping in the brake device (brake system). In FIG. 2, the brake device includes a hydraulic control unit 1, a front wheel brake lever 2, a front wheel master cylinder 3, a front wheel left caliper 4, a front wheel right caliper 5, and a rear wheel brake. A pedal 30, a rear wheel master cylinder 31, and a rear wheel caliper 32 are provided.

  The front wheel brake lever 2 and the rear wheel brake pedal 30 are brake operation units. By operating the front wheel brake lever 2, the front wheel master cylinder 3 operates. By operating the rear wheel brake pedal 30, the rear wheel master cylinder 31 is operated.

  Each device in the brake device is connected by a brake pipe assembly so that brake fluid can flow. The brake pipe assembly is composed of brake pipes and joints. The hydraulic control unit 1 and each brake pipe assembly 10, 20, 21, 33, 34 are connected as follows. The front wheel master cylinder 3 and the first inlet port 1 a of the fluid pressure control unit 1 are connected by a front wheel operation side brake piping assembly 10. The left caliper 4 for the front wheel and the first outlet port 1b of the hydraulic pressure control unit 1 are connected by a brake caliper assembly 20 for the left caliper. The right caliper 5 for the front wheel and the second outlet port 1c of the hydraulic pressure control unit 1 are connected by a brake pipe assembly 21 for the right caliper. The rear wheel master cylinder 31 and the second inlet port 1 e of the hydraulic pressure control unit 1 are connected by a rear wheel operation side brake piping assembly 33. The rear wheel caliper 32 and the third outlet port 1 f of the hydraulic pressure control unit 1 are connected by a rear wheel operation side brake pipe assembly 34.

  In particular, the rear wheel operation side brake pipe assembly 33 includes a rubber brake pipe 36-1, a first connecting portion 331, a metal brake pipe 35-1, a second connecting portion 332, and a rubber brake pipe. 36-2, the 3rd connection part 333, and metal brake piping 35-2. Further, the rear wheel working side brake pipe assembly 34 includes a metal brake pipe 37-1, a first connecting part 341, a rubber brake pipe 38-1, a second connecting part 342, and a metal brake pipe. It is comprised from 37-2, the 3rd connection part 343, and rubber-made brake piping 38-2. The connecting portions 331, 332, 333, 341, 342, and 343 are constituted by joints and joint fixing means such as bolts.

(Pressure sensor support structure)
As shown in FIGS. 3 and 4, the hydraulic pressure control unit 1 is provided with a built-in pressure sensor and external pressure sensors 191, 192, and 90. The built-in pressure sensor is disposed inside the casing 1 </ b> A of the hydraulic pressure control unit 1. The external pressure sensors 191 and 192 are fixed to sensor ports 1g and 1h formed in the casing 1A, respectively. In addition, the external pressure sensor 90 is fixed to the third outlet port 1f by the configuration described later. Below, the support structure of the pressure sensor 90 to the hydraulic-pressure control unit 1 is demonstrated.

  As described above with reference to FIG. 2, the hydraulic pressure control unit 1 includes five brake pipe connection ports 1a, 1b, 1c, 1e, and 1f. Each of the ports 1a, 1b, 1c, 1e, and 1f is an opening formed in the casing 1A of the hydraulic pressure control unit 1. Each port 1a, 1b, 1c, 1e, 1f is formed with a female screw. For this reason, brake piping can be connected to each port 1a, 1b, 1c, 1e, 1f via a flare nut.

  In FIG. 3, ports 1a, 1b, 1c, 1e, and 1f are open on the upper surface of the casing 1A. Ports 1b, 1c, 1e, and 1f are arranged in a line in the front-rear direction. The port 1a is disposed on the right side of the row of ports 1b, 1c, 1e, and 1f. In FIG. 3, the right side (upper right side) of the figure is the front side of the motorcycle A, and the left side (lower left side) of the figure is the rear side of the motorcycle A. Ports 1a, 1b, and 1c are ports for the front wheel 73. On the other hand, the ports 1e and 1f are ports for the rear wheel 93. In particular, the third outlet port 1f is located at the leftmost rear position on the upper surface of the casing 1A.

  A metal brake pipe 35-2 at the end of the rear wheel operation side brake pipe assembly 33 is fixed to the second inlet port 1 e by a flare nut 97.

  The external pressure sensor 90 is fixed to the sensor joint 94. In addition, a sensor joint 94 and a piping joint 95 are fastened together with a banjo bolt 96 to the third outlet port 1 f. The sensor joint 94 and the piping joint 95 are eye joints. The eye joint is a joint having a cylindrical main body.

  In FIG. 4, the sensor joint 94 includes a cylindrical main body 94a, a sensor mounting portion 94b, a first locking portion 94c, and a second locking portion 94d. The sensor mounting portion 94b is fixed to the outer peripheral surface of the cylindrical main body 94a. The first locking portion 94c and the second locking portion 94d are formed integrally with the cylindrical main body 94a. The external pressure sensor 90 is fixed to the sensor mounting portion 94b. An opening is formed in the sensor mounting portion 94b. When the external pressure sensor 90 is mounted on the sensor mounting portion 94b, the opening and the inside of the external pressure sensor 90 communicate with each other. An opening (not shown) is formed on the inner peripheral surface of the cylindrical main body 94a. The opening of the sensor mounting portion 94b communicates with the opening of the cylindrical main body 94a.

  The piping joint 95 includes a cylindrical main body 95a and a cylindrical connecting portion 95b. The connection portion 95b is integrally fixed to the outer peripheral surface of the cylindrical main body 95a. A metal brake pipe 37-1 at the end of the rear wheel working side brake pipe assembly 34 is fixed to the connection portion 95 b. The cylindrical main body 95a is a portion where the connecting portion 95b is disposed, and a communication path that connects the inner peripheral surface and the peripheral surface is formed. For this reason, the inside of the metal brake pipe 37-1 connected to the connection part 95b and the opening part (exit of the communicating path) formed in the inner peripheral surface of the cylindrical main body 95a communicate.

  The banjo bolt 96 has a screw shaft and a bolt head 96a integrated with the screw shaft. The screw shaft of the banjo bolt meshes with the third outlet port 1f. A channel (not shown) for allowing fluid to pass through is formed inside the screw shaft. The flow path is opened at two locations on the tip surface of the screw shaft and the outer peripheral surface of the screw shaft. For this reason, the flow path formed in the hydraulic pressure control unit 1, the flow path formed in the sensor joint 94, and the piping joint 95 through the flow path in the screw shaft of the banjo bolt 96. Brake fluid flows between the formed flow path.

  The layout of the sensor joint 94 will be described. The sensor joint 94 is positioned on the upper surface of the casing 1 </ b> A, the piping joint 95 is positioned on the sensor joint 94, and the bolt head of the banjo bolt 96 is positioned on the piping joint 95. Thereby, the sensor joint 94 is disposed closer to the third outlet port 1 f than the piping joint 95.

  The rotation preventing means for the sensor joint 94 and the piping joint 95 around the screw shaft of the banjo bolt 96 will be described. The rotation of the sensor joint 94 and the piping joint 95 is restrained clockwise in FIG. First, when the first locking portion 94c contacts the rear surface of the casing 1A, the clockwise rotation of the sensor joint 94 is restrained with respect to the casing 1A. The first locking portion 94c is shown in FIG. Next, when the connecting portion 95b abuts on the second locking portion 94d, the clockwise rotation of the piping joint 95 is restrained with respect to the sensor joint 94. In this way, the rotation of the sensor joint 94 and the piping joint 95 is restrained.

  The layout of the external pressure sensor 90, the sensor joint 94, the metal brake pipe 37-1, and the metal brake pipe 35-2 will be described. As described above, the sensor joint 94 is fixed to the third outlet port 1f located on the uppermost left side of the casing 1A. In addition, the external pressure sensor 90 is fixed to the sensor joint 94 so as to extend rearward from the sensor joint 94. At this time, as described above, the first locking portion 94c is in contact with the rear surface of the casing 1A. The metal brake pipe 37-1 extends from the pipe joint 95 to the right rear, further bends and extends rearward, and further bends and extends downward. The metal brake pipe 35-2 extends upward from the flare nut 97, further bends and extends to the right rear, and further bends and extends downward.

[Effect of this embodiment]
The motorcycle having the pressure sensor support structure of the present embodiment has the following effects.

  In the present support structure, the sensor joint 94 and the piping joint 95 are fastened together with the third outlet port 1 f using a banjo bolt 96. Therefore, the third outlet port 1f also serves as a nut for fixing the sensor joint 94 with a bolt. Thereby, it is not necessary to use another nut and to secure a place for attaching the nut. Therefore, it is possible to attach the external pressure sensor 90 to the motorcycle while suppressing an increase in the number of parts and layout space.

  The external pressure sensor 90 is fixed to the hydraulic pressure control unit 1. The hydraulic control unit 1 is elastically supported by the main frame F via elastic members 46, 47 and 47. For this reason, the external pressure sensor 90 fixed to the hydraulic pressure control unit 1 is less susceptible to vibration than the external pressure sensor 90 attached to a position other than the hydraulic pressure control unit 1. Therefore, the vibration generated in the motorcycle does not easily reach the external pressure sensor 90, and the brake fluid pressure detection accuracy by the external pressure sensor 90 does not decrease.

  In this support structure, the sensor joint 94 is disposed closer to the third outlet port 1 f than the piping joint 95. For this reason, the external pressure sensor 90 is fixed at a position closer to the hydraulic pressure control unit 1. Therefore, the vibration generated in the motorcycle does not easily reach the external pressure sensor 90, and the brake fluid pressure detection accuracy by the external pressure sensor 90 does not decrease.

  In the present support structure, the external pressure sensor 90 connected to the sensor joint 94 is disposed so as to extend from the end of the upper surface of the casing 1A toward the outside of the upper surface. For this reason, the external pressure sensor 90 does not interfere with the brake pipe connected to the ports 1a, 1b, 1c, and 1e formed on the upper surface of the casing 1A. Therefore, even if the external pressure sensor 90 is provided in the hydraulic pressure control unit 1, the layout of the brake piping connected to the hydraulic pressure control unit 1 is not complicated.

[Other inventions]
In the support structure described above, other hydraulic components can be attached to the sensor joint 94 instead of the external pressure sensor 90. Here, the hydraulic component means a component arranged on the brake fluid passage path in the brake system. In addition to the pressure sensor, the hydraulic component includes a brake pipe, a branch pipe of the brake pipe, and the like. By adopting the above configuration, it is possible to attach hydraulic parts to a motorcycle while suppressing an increase in the number of parts and layout space.

1 is a side view showing a vehicle body structure of a motorcycle. It is a figure which shows the outline | summary of the layout of the brake piping in the brake device of a motorcycle. It is a perspective view which shows the support structure of an external pressure sensor. It is a side view which shows the support structure of an external pressure sensor.

Explanation of symbols

1 Hydraulic pressure control unit 1f Third outlet port 33 Rear wheel operation side brake piping assembly 37-1 Metal brake piping 90 External pressure sensor 94 Sensor joint 95 Piping joint 96 Banjo bolt

Claims (2)

In a motorcycle provided with a pressure sensor support structure for supporting a pressure sensor that detects a brake fluid pressure in at least one of the antilock brake system and the front-rear interlocking brake system,
The brake system has a hydraulic pressure control unit for controlling the brake hydraulic pressure;
A flow that allows fluid to pass through a screw shaft through a sensor joint that connects the pressure sensor to a brake pipe connection port of the hydraulic pressure control unit and a pipe joint that connects a brake pipe for the brake system. It is tightened together with a bolt with a path,
A motorcycle equipped with a pressure sensor support structure. The sensor joint is disposed closer to the port than the piping joint.
A motorcycle comprising the pressure sensor support structure according to claim 1.

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