JP2011131733A - Footrest brake device installing structure of motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the installation performance of a brake device even if arranging the brake device in the inside vicinity of a footrest. <P>SOLUTION: This footrest brake device installing structure of a motorcycle includes the footrest 32 for placing feet of a rider, the brake device 33 having a brake pedal 35 rotating when a stepping force acts and a master cylinder 36 operated by the rotational movement of the brake pedal and arranged in the inside vicinity of the footrest 32 and an installation bracket 34 for installing the footrest and the brake device in a lower part of a vehicle body frame. The installation bracket 34 includes a first bracket 37 installed in the vehicle body frame and supporting the brake device 33 and a second bracket 38 separably installed on the first bracket and supporting the footrest 32. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a footrest / brake device mounting structure for a motorcycle in which a brake device is disposed in the vicinity of the inside of the footrest.

  Patent Document 1 discloses a footrest and a brake device that are attached to a lower portion of a vehicle body frame using a bracket, and among them, the brake device is disposed in the vicinity of the inside of the footrest.

  In addition, conventional motorcycles are configured so as to prevent vibrations of the engine from being transmitted to the foot resting on the footrest by interposing an anti-vibration member between the body frame and the bracket that supports the footrest and the brake device. Is known.

JP 2003-89382 A

  In the motorcycle described in Patent Document 1, since the bracket that supports the footrest and the brake device is configured so as not to be separated, the assembling property of the brake device disposed in the vicinity of the inside of the footrest is not necessarily excellent. That's not true.

  In addition, in a motorcycle in which a vibration isolating member is interposed between the bracket that supports the footrest and the brake device and the vehicle body frame, the distance between the footrest and the vibration isolating member is increased. When a vibration isolating member having a low spring constant is used, the footrest tilt angle when the driver puts his / her foot on the footrest becomes large, and the stability of the footrest is lowered. Further, when the driver depresses the brake pedal of the brake device, the pedal is fluffy, which may impair the brake feeling.

  The object of the present invention has been made in consideration of the above-mentioned circumstances, and even when a brake device is disposed in the vicinity of the inside of the footrest, the footrest of the motorcycle that can improve the assemblability of the brake device. -To provide a brake device mounting structure.

  Another object of the present invention is to provide a footrest / brake device mounting structure for a motorcycle capable of ensuring good vibration-proofing and stability of the footrest and improving the brake feeling of the brake device. It is in.

  The present invention includes a footrest on which a driver's foot is placed, a brake pedal that rotates when a stepping force is applied, and a master cylinder that is operated by the rotation of the brake pedal, and is disposed in the vicinity of the inside of the footrest. In a motorcycle footrest / brake device mounting structure configured to include a brake device, and a bracket for mounting the footrest and the brake device to a lower portion of a vehicle body frame, the bracket is attached to the vehicle body frame and is A first bracket that supports the brake device and a second bracket that is detachably attached to the first bracket and supports the footrest are configured.

  According to the present invention, in the above invention, an anti-vibration member comprising an elastic body is interposed between the first bracket and the second bracket, and the second bracket is supported by the first bracket. It is characterized by that.

  According to the present invention, since the brake device can be easily attached or removed with the footrest and the second bracket removed, the brake device can be assembled even when the brake device is disposed in the vicinity of the inside of the footrest. Can be improved.

  Further, according to the present invention, since the vibration isolating member is interposed between the first bracket and the second bracket, it is possible to ensure the stability of the footrest well and to ensure the vibration isolating performance of the footrest. Furthermore, since the first bracket is attached to the vehicle body frame without using the vibration isolating member, the brake feeling can be improved.

1 is a right side view showing a motorcycle to which a first embodiment of a footrest / brake device mounting structure for a motorcycle according to the present invention is applied. FIG. The front view which shows the footrest and brake device of FIG. 1 with a mounting bracket. The right view which shows the footrest, the brake device, etc. of FIG. The left view which shows the footrest, brake device, etc. of FIG. The V arrow line view of FIG. FIG. VII arrow line view of FIG. The front view which removes a footrest and a 2nd bracket and shows a brake device and a 1st bracket. Sectional drawing which follows the IX-IX line | wire of FIG.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, the present invention is not limited to these embodiments.

  FIG. 1 is a right side view showing a motorcycle to which a first embodiment of a footrest / brake device mounting structure for a motorcycle according to the present invention is applied. A motorcycle 10 referred to as an American type shown in FIG. 1 includes a body frame 11 made of steel or aluminum alloy. The body frame 11 includes a head pipe 12, a pair of left and right down tubes 13, and a pair of left and right tanks. It has a rail 14 and the like.

  The head pipe 12 is provided with a front fork 15 pivotally supported so as to be steerable to the left and right. A handle bar 16 is fixed to the upper end of the front fork 15, and a grip 17 is attached to the upper end of the handle bar 16 in the vehicle width direction. A front wheel 18 is rotatably supported at the lower portion of the front fork 15, and a front fender 19 is fixed so as to cover the upper portion of the front wheel 18.

  The pair of left and right down tubes 13 has a front end coupled to the head pipe 12, branches left and right from the head pipe 12, extends obliquely downward, bends at the lower portion thereof, and extends substantially horizontally toward the rear of the vehicle. Is done. A swing arm (not shown) is pivotally supported on the rear portion of the down tube 13 via a swing arm bracket 28 described later, and a rear wheel 20 is rotatably supported at the rear end of the swing arm. A rear fender 21 is disposed above the rear fender 21.

  The pair of left and right tank rails 14 are coupled to the head pipe 12 at the front end, and branch left and right from the head pipe 12 to extend rearward of the vehicle. The tank rail 14 and a seat rail (not shown) connected to the tank rail 14 support the teardrop type fuel tank 22, the seat 23, and the rear fender 21 sequentially from the front of the vehicle.

  An engine unit 24 is mounted between the down tube 13 and the tank rail 14. In the present embodiment, the engine unit 24 is a water-cooled V-type two-cylinder engine, and the transmission is housed in an engine case 25 and configured as one unit. An exhaust pipe 26 is connected to the engine unit 24, the exhaust pipe 26 extends rearward of the vehicle, and an exhaust muffler 27 is connected to the rear end thereof.

  The down tube 13 and the tank rail 14 are connected by a plurality of cross members on the left and right sides, and are connected by a swing arm bracket 28 and a seat pillar (not shown) in the vehicle vertical direction. Further, the down tube 13 is provided with a frame cover 30 that covers the front end side from the left and right sides of the vehicle, and a headlamp unit 31 is supported in front of the frame cover 30 or in front of the head pipe 12 in the vehicle.

  By the way, around the lower bent portion 13 </ b> A of the down tube 13, a footrest 32 that protrudes outward in the vehicle width direction and on which a driver's foot is placed, and a brake device 33 that brakes the vehicle are attached to the mounting bracket 34. is set up.

  As shown in FIG. 2, the footrest 32 is a plate-like footrest called a step plate and extends in the vehicle front-rear direction. The brake device 33 includes a brake pedal 35 that rotates when the driver's stepping force is applied, and a master cylinder 36 that is operated by the rotation of the brake pedal 35.

  As shown in FIGS. 2 to 7, the mounting bracket 34 is attached to the lower bent portion 13 </ b> A of the down tube 13 and supports the brake device 33, and is detachably attached to the first bracket 37. And a second bracket 38 that supports the footrest 32.

  The first bracket 37 includes a first main bracket 39 (FIGS. 3 and 4), an L-shaped shaft support bracket 40 (FIGS. 4 and 5) welded to the first main bracket 39, and the A cylinder bracket 41 (FIG. 7) that is welded to the shaft support bracket 40 and extends obliquely forward and upward in the vehicle and a switch bracket 42 (FIG. 7) that is welded to the shaft support bracket 40 are provided.

  As shown in FIGS. 3, 4, and 6, the first main bracket 39 includes a vehicle body frame mounting stay portion 43 that is provided by bending downward in the vehicle width direction inside and a vehicle upward in the vehicle width direction outside. And a second bracket mounting stay portion 44 provided by bending. The vehicle body frame mounting stay portion 43 uses the first mounting bolt 45 to detachably attach and fix the first main bracket 39 (that is, the first bracket 37) to the lower bent portion 13A (FIG. 1) of the down tube 13. Further, the second bracket mounting stay portion 44 uses the second mounting bolt 46 and the nut 47 to detachably mount the second bracket 38 to the first main bracket 39 (that is, the first bracket 37).

  As shown in FIGS. 4, 5, and 7, the shaft support bracket 40 integrally includes a shaft support 48 that extends horizontally in the vehicle width direction. The shaft support portion 48 rotatably supports a shaft of the brake pedal 35 (hereinafter referred to as a brake pedal shaft 50). A base portion 35A of the brake pedal 35 is fixed to one end of the brake pedal shaft 50 using a bolt 49, and the brake pedal shaft 50 is provided integrally with the brake pedal 35 so as to rotate. The brake pedal 35 is provided so as to be removable from the brake pedal shaft 50 outward in the vehicle width direction by loosening the bolt 49.

  As shown in FIGS. 3 and 7, the cylinder bracket 41 supports the master cylinder 36, and a hydraulic hose 51 is connected to the master cylinder 36. The operating portion 52 of the master cylinder 36 is connected to the upper end of a lever 53 welded to the other end of the brake pedal shaft 50. A return spring 54 is disposed between the lower end of the lever 53 and the cylinder bracket 41. When a stepping force is applied to the stepping force acting portion 55 at the tip of the brake pedal 35, the lever 53 rotates against the urging force of the return spring 54 via the brake pedal shaft 50. The operating part 52 moves upward in the vehicle and hydraulic pressure is generated in the master cylinder 36.

  The switch bracket 42 supports the stopper lamp switch 56. The stopper lamp switch 56 detects the turning of the brake pedal shaft 50 when a depression force is applied to the brake pedal 35 of the brake device 35, and instructs the brake lamp 29 (FIG. 1) to turn on. It is.

  As shown in FIGS. 2, 6 and 8, at least the second bracket mounting stay portion 44 of the first main bracket 39 is formed with a notch 57 at a location corresponding to the brake pedal shaft 50. Yes. The notch 57 is configured to have a dimension that allows the base 35A of the brake pedal 35 to pass through. That is, as described above, since the brake pedal 35 is attached to the brake pedal shaft 50 so as to be removable from the vehicle width direction, the brake pedal 35 is attached to or removed from the base 35A of the brake pedal 35. 35 base portions 35 </ b> A are provided so as to be able to pass through the notches 57 of the second bracket mounting stay portion 44.

  As shown in FIGS. 3 to 6, the second bracket 38 is configured such that a mounting stay portion 59 is erected on the second main bracket 58, and the footrest 32 rotates in the vehicle vertical direction on the mounting stay portion 59. It is pivoted as possible. The second main bracket 58 is attached to the second bracket mounting stay portion 44 of the first main bracket 39 of the first bracket 37 using the second mounting bolt 46 as described above. An anti-vibration bush 60 serving as an anti-vibration member is interposed between the first main bracket 39 and the second bracket mounting stay portion 44.

  As shown in FIG. 9, the anti-vibration bush 60 includes an inner cylinder 61, an elastic cylinder 62, and an outer cylinder 63 that are sequentially coupled from the inside. The inner cylinder 61 is longer than the elastic cylinder 62 and the outer cylinder 63 in the axial direction, and is formed so that the second mounting bolt 46 can be inserted therethrough. The elastic cylinder 62 is preferably natural rubber or synthetic rubber having a small spring constant. A cylindrical holder 64 is welded to the second main bracket 58 of the second bracket 38, and the vibration isolating bush 60 is press-fitted into the holder 64 and fixed.

  When the second bracket 38 is attached to the first main bracket 39 of the first bracket 37, the second attachment bolt 46 is placed in the inner cylinder 61 of the vibration isolating bush 60 fixed to the second main bracket 58 of the second bracket 38. And the tip of the second mounting bolt 46 is tightened with a nut 47. Thereby, the inner cylinder 61 of the vibration isolating bush 60 is sandwiched between the head of the second mounting bolt 46 and the second bracket mounting stay portion 44 of the first main bracket 39. In this state, the second bracket 38 is supported by the first main bracket 39 of the first bracket 37 via the elastic cylinder 62 of the vibration-isolating bush 60. That is, the footrest 32 supported by the second bracket 38 is an elastic cylindrical body of the vibration isolating bush 60 even when vibration from the engine unit 24 (FIG. 1) is transmitted through the down tube 13 and the first bracket 37. This vibration is absorbed by 62.

  With the configuration as described above, the following effects (1) to (6) are achieved according to the present embodiment.

  (1) As shown in FIG. 2, the mounting bracket 34 is attached to the down tube 13 to support the brake device 33, and is detachably attached to the first bracket 37 to support the footrest 32. And a second bracket 38. Therefore, as shown in FIG. 8, with the footrest 32 and the second bracket 38 removed, the brake device 33 is attached to or removed from the first bracket 37, or the first bracket 37 to which the brake device 33 is attached is attached or removed. Since it can remove, attachment or removal of the brake device 33 can be implemented easily. Furthermore, with the footrest 32 and the second bracket 38 removed, the height of the brake pedal 35 in the brake device 33 can be easily adjusted. As a result, even when the brake device 33 is disposed in the vicinity of the inside of the footrest 32, the assembling property of the brake device 33 can be improved.

  (2) Since the anti-vibration bush 60 (FIGS. 4 and 9) is interposed between the first bracket 37 and the second bracket 38, the distance L between the footrest 32 and the anti-vibration bush 60 is set to the footrest 32 and the second bracket 38. It can be set shorter than the distance M between the bracket 37 and the vehicle body frame mounting stay 43. Therefore, the tilt angle of the footrest 32 when the driver's feet are placed on the footrest 32 is reduced, and the stability of the footrest 32 can be ensured satisfactorily.

  (3) Since the stability of the footrest 32 is ensured, the elastic body 62 having a small spring constant can be adopted for the vibration isolating bush 60, and the anti-vibration effect by the anti-vibration bush 60 is enhanced. It can be secured well.

  (4) Since the second bracket 38 and the footrest 32 have a floating structure with the anti-vibration bush 60 interposed between the first bracket 37 and the second bracket 38, the natural vibration of the second bracket 38 and the footrest 32 is obtained. The number can be kept away from the normal frequency range when the engine unit 24 is operated. As a result, resonance of the second bracket 38 and the footrest 32 is prevented during operation of the engine unit 24, and the vibration isolation effect can be further improved.

  (5) Since the first bracket 37 is attached to the down tube 13 without the vibration-proof bush 60, the brake feeling when the driver depresses the brake pedal 35 of the brake device 33 can be improved.

  (6) The second bracket mounting stay portion 44 of the first bracket 37 has a notch portion 57 that can pass through the base portion 35A of the brake pedal 35 at a portion corresponding to the brake pedal shaft 50, as shown in FIG. Is formed. For this reason, the attachment / detachment of the brake pedal 35 to / from the brake pedal shaft 50 can be easily performed by passing the base portion 35A of the brake pedal 35 into the notch portion 57 of the second bracket attachment stay portion 44. Therefore, the assembling property of the brake device 33 can be improved also from this point.

10 motorcycle 11 body frame 13 down tube 13A lower bent portion 32 footrest 33 brake device 34 mounting bracket 35 brake pedal 36 master cylinder 37 first bracket 38 second bracket 43 body frame mounting stay portion 44 second bracket mounting stay portion 48 shaft Branch 50 Brake pedal shaft 57 Notch 60 Anti-vibration bush (vibration-proof member)
62 Elastic cylinder (elastic body)

Claims (3)

A footrest on which the driver's feet can be placed;
A brake pedal that rotates when a pedaling force is applied, and a master cylinder that is operated by the rotation of the brake pedal, and a brake device that is disposed near the inside of the footrest;
In a structure for mounting a footrest / brake device for a motorcycle, comprising the bracket for attaching the footrest and the brake device to a lower part of a vehicle body frame,
The bracket includes a first bracket that is attached to the body frame and supports the brake device, and a second bracket that is detachably attached to the first bracket and supports the footrest. A structure for mounting a footrest / brake device for a motorcycle. The anti-vibration member comprising an elastic body is interposed between the first bracket and the second bracket, and the second bracket is supported by the first bracket in an anti-vibration manner. The mounting structure of the footrest / brake device of the motorcycle described in 1. The first bracket extends horizontally in the vehicle width direction and supports a shaft of a brake pedal, a vehicle body frame mounting stay portion that is provided inside the vehicle width direction and is attached to the vehicle body frame, A second bracket mounting stay provided on the outer side in the width direction for mounting the second bracket;
The brake pedal is attached to the shaft of the brake pedal so that it can be inserted / removed outward in the vehicle width direction, and the second bracket mounting stay portion has a notch formed at a location corresponding to the shaft of the brake pedal. The structure for mounting a footrest / brake device for a motorcycle according to claim 1, characterized in that:

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