JP2010042701A - Brake master cylinder device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake master cylinder device provided with sufficient appearance property while ensuring sufficient maintenance property. <P>SOLUTION: The brake master cylinder device 130 includes a master cylinder 54; a reserve tank 114 auxiliarily provided on the master cylinder 54; and an inspection window 126 provided on the reserve tank 114. The reserve tank 114 is a box body including a front wall part 131, a rear wall part 132, an inner wall part 133 and an outer wall part 134, and the inner wall part 133 includes two surfaces formed such that it becomes a projection toward a center of the vehicle. These two surfaces includes a large side surface 141 with a large area and a small side surface 142 with a small area, a flat part 143 is provided on the large side surface 141, and the inspection window 126 is provided on the flat part 143. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a brake master cylinder device provided with a reserve tank for storing excess brake fluid.

A master cylinder device for a bar handle vehicle equipped with a reserve tank for storing excess brake fluid is known (see, for example, Patent Document 1).
JP 2004-130911 A (FIG. 1)

  In FIG. 1 of Patent Document 1, a reservoir 10 (hereinafter referred to as “reserve tank 10”) of a hydraulic master cylinder device 13 (reference numerals are diverted from the same publication) is referred to as a front part of a vehicle body. A side wall 20a, a vehicle body rear side wall 20b provided on the opposite side of the vehicle body front side wall 20a, an operation lever side wall 20c facing the operation lever 11, and a vehicle body central side wall 20d provided on the side opposite to the operation lever side wall 20c are provided. It has been.

  Conventionally, an inspection window for inspecting the amount of brake fluid in the reserve tank 10 may be provided on the vehicle body rear side wall 20b. In this case, in order to ensure the visibility of the inspection window, the position of the reserve tank 10 is usually arranged at a position higher than the handle bar 1. Then, since the reserve tank 10 is arranged so as to jump out above the handlebar 1, there is room for improvement in the appearance of the brake master cylinder device and its surroundings.

  This invention makes it a subject to provide the brake master cylinder apparatus provided with the favorable external appearance property, ensuring favorable maintenance property.

  The invention according to claim 1 includes a master cylinder that converts the operating force of the brake lever into hydraulic pressure, a reserve tank that is attached to the master cylinder and stores excess brake fluid, and an amount of brake fluid provided in the reserve tank. An inspection window to be inspected, and a reserve tank having a front wall facing the vehicle front, a rear wall facing the vehicle rear, an inner wall facing the vehicle center, and an outer wall facing the vehicle side. In a brake master cylinder device for a vehicle in which a front wall portion is inclined backward with respect to a steering handle by narrowing an outer wall portion from an inner wall portion, the inner wall portion When viewed from above, it consists of two surfaces formed so as to protrude toward the center of the vehicle, and these two surfaces consist of a large side surface with a large area and a small side surface with a smaller area than this large side surface. Big The surface, provided with a flat portion, characterized in that the inspection window is provided in the flat portion.

  The invention according to claim 2 forms a recess in which the lower half of the rear wall is recessed toward the front of the vehicle, and brings the steering handle close to the recess, thereby reducing the distance from the center of the steering handle to the upper surface of the reserve tank. It is characterized by being shortened.

  In the invention according to claim 1, in the brake master cylinder device attached to the steering handle of the vehicle, the reserve tank is a box including a front wall portion, a rear wall portion, an inner wall portion, and an outer wall portion, An inspection window is provided on the inner wall facing the vehicle center.

  Conventionally, when an inspection window is provided on the rear side wall facing the rear of the vehicle and a steering handle is provided behind the inspection window, the steering handle may block the inspection window, making it difficult to see the inspection window. there were. In order to prevent the inspection window from being obstructed by the steering handle, the reserve tank is shifted upward so that the inspection window of the reserve tank is positioned above the steering handle.

  In order to ensure the visibility of the inspection window, if the reserve tank is placed above the steering handle, the reserve tank will protrude above the steering handle. There was room for improvement.

  In this regard, in the present invention, since the inspection window is provided on the inner wall portion provided inward of the vehicle, it is not necessary to shift the reserve tank above the steering handle. Since the reserve tank is not disposed above the steering handle, the amount of projection of the reserve tank from the steering handle can be suppressed, and the appearance of the brake master cylinder device and its surroundings can be improved. In addition, the inspection window can be easily seen. In other words, according to the present invention, it is possible to obtain a brake master cylinder device having good appearance while ensuring good maintainability.

  In the invention according to claim 2, a recess is formed in which the lower half of the rear wall is recessed toward the front of the vehicle, the steering handle is brought close to the recess, and the distance from the center of the steering handle to the upper surface of the reserve tank is reduced. I made it.

  If the distance from the center of the steering wheel to the upper surface of the reserve tank is reduced, the height of the reserve tank can be brought close to the height of the steering wheel. Then, the amount by which the reserve tank protrudes from the steering handle can be suppressed. If the amount of protrusion from the steering handle of the reserve tank is suppressed, the appearance of the vehicle can be further enhanced.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. In the figure, “up”, “down”, “left”, “right”, “front”, and “rear” are directions viewed from the occupant seated in the vehicle. The drawings are viewed in the direction of the reference numerals.

FIG. 1 is a left side view of a vehicle according to the present invention. A motorcycle 10 as a vehicle is provided with a body frame 11.
The vehicle body frame 11 includes a head pipe 12, a main frame 14 that extends rearward from the head pipe 12 and supports the engine 13, and extends rearward from the upper rear end of the main frame 14 to support the occupant seat 15. And a rear frame 19 for attaching an electrical component such as 16 and supporting a vehicle body rear portion 18 including a rear fender 17.
The main frame 14 includes a pivot plate 22 provided at the rear end of the main frame 14 and supporting the swing arm 28.

  A pivot shaft 27 is provided on the pivot plate 22, and a rear swing arm 28 (swing arm 28) extends rearward from the pivot shaft 27, and a rear that absorbs an impact between the swing arm 28 and the main frame 14. A cushion unit 29 is provided, and a rear wheel 31 is attached to the tip of the swing arm 28. The rear wheel 31 is driven by a drive shaft (not shown) that connects between the engine 13 and the rear wheel 31.

  The head pipe 12 is provided with a front fork 24, a front wheel 25 is attached to the lower end portion of the front fork 24, and a steering handle 26 for steering the front wheel 25 is provided at the upper end portion of the front fork 24.

  An engine 13 (V-type four-cylinder engine 13) is mounted on the main frame 14. The engine 13 is supported by the main frame 14 via first to fourth support points 30a to 30d. The first to fourth support points 30a to 30d are provided horizontally in the vehicle width direction, and are arranged in this order from the front to the rear of the vehicle. Among these support points, the third to fourth support points 30 c to 30 d are provided on the pivot plate 22. That is, the engine 13 is suspended by the main frame 14 and the pivot plate 22.

  The V-type four-cylinder engine 13 includes a crankcase 37, a front cylinder 35 extending obliquely forward and upward with a crankshaft 34 provided in the crankcase 37 as a center, and extending obliquely rearward and upward with the crankshaft 34 as a center. After that, the cylinder 36 is arranged in a V shape. In the V-type four-cylinder engine 13, when the vehicle is viewed from the side, the main frame 14 overlaps the front cylinder 35 and the rear cylinder 36 that constitute the upper part of the engine 13, and the crankcase that constitutes the rear part of the engine 13. 37 is suspended so that a part of the pivot plate 22 overlaps.

The V-type four-cylinder engine 13 is provided with an exhaust device 33.
The exhaust device 33 includes exhaust pipes 41 a to 41 d extending from the cylinders 35, 35, 36, 36, a catalyst pipe 45 that collects the exhaust pipes 41 a to 41 d and purifies exhaust gas, and the catalyst pipe 45. And a muffler 47 connected to the general collecting pipe 46.

  In the figure, 51 is a radiator unit for cooling the engine 13, 52L, 52R (only the front side reference numeral 52L is shown, the same applies hereinafter), front disk brake caliper provided on the front fork, 53L, 53R (front side reference numeral 53L only) The same applies hereinafter.) Is a front disk plate provided on the front wheel 25 and sandwiched between the front disk brake calipers 52L and 52R, 54 is a front master cylinder provided on the steering handle, 56 is a fuel tank attached to the main frame 14 and covers a fuel tank described later. The fuel tank covers 57L and 57R (only the front side reference numeral 57L are shown, the same applies hereinafter) also serving as the cowl portion 70 to be attached are shown to the driver steps 58L and 58R (only the front side reference numeral 58L attached to the main frame 14). The same shall apply hereinafter) to the rear frame 19. Steps for passengers, 59, headlights, 60, front fenders, 61L, 61R (only reference numeral 61L on the front side is shown), mirrors, 62, rear disc brake calipers, 63, rear wheels 31 A rear disc plate 65, which is sandwiched by the disc brake caliper 62, is a main stand.

Hereinafter, the cowl part 70 which mainly constitutes the exterior part of the motorcycle 10 will be described.
The cowl portion 70 includes a front cowl portion 72 that extends from the head pipe 12 and covers the front of the vehicle body frame 11 via a cowl stay 71 described later, and a side cowl portion that is provided continuously from the front cowl portion 72 and covers the side of the vehicle. 73 and an under cowl 74 provided below the engine 13 for the purpose of improving wind protection and the appearance of the vehicle.

  The front cowl 72 includes an upper center cowl 76 that covers the top of the headlight 59, a wind screen 77 that extends above the upper center cowl 76, and middle cowls 78L and 78R that cover the sides of the main frame 14 (see FIG. The front upper side cowl 79L and 79R (only the front side reference numeral 79L is shown. The same applies hereinafter) to which the left and right sides of the wind screen 77 are attached are shown. .

  The side cowl portion 73 covers the front upper side cowls 79L and 79R that support the left and right sides of the wind screen 77, the middle cowls 78L and 78R that cover the sides of the head pipe 12 and the main frame 14, and the lower part of the fuel tank cover 56. Knee covers 81L and 81R (only the reference numeral 81L on the front side of the figure is shown; the same applies hereinafter) sandwiched between the legs Rf of the driver R during driving, and components of the main frame 14 provided below these knee covers 81L and 81R Pivot plates 22L and 22R (only the reference numeral 22L on the front side of the figure is shown. The same applies hereinafter) pivot plate covers 82L and 82R that cover the outer surface.

FIG. 2 is a plan view of an essential part of a motorcycle equipped with a brake master cylinder device according to the present invention.
A cowl stay 71 for supporting a wind screen 77 as a cowl is provided in front of the head pipe 12 constituting the front end portion of the vehicle body frame 11, and a meter portion 111 is attached to the cowl stay 71. The meter unit 111 performs speedometer, blinker display, transmission mode display, and the like. The cowl stay 71 is provided with left and right rear viewing mirrors 61L and 61R.

A steering handle 26 for steering the front wheel 25 is rotatably provided on the head pipe 12. A front master cylinder 54 (master) for converting the operating force of the brake lever 113 into hydraulic pressure is provided on the right side of the steering handle 26. A cylinder 54), a reserve tank 114 provided above the master cylinder 54 for storing excess brake fluid, and a clutch master cylinder for converting the operating force of the clutch lever 115 into hydraulic pressure on the left side of the steering handle 26 55 is provided, and a clutch fluid reserve tank 116 is provided above the clutch master cylinder 55 and stores excess clutch fluid.
In the figure, 121L and 121R are grip portions provided at the tip of the steering handle 26 and gripped by the driver, and 122 is a key cylinder for turning on and off the engine and the like.

FIG. 3 is a plan view of a steering handle to which a brake master cylinder device according to the present invention is attached, and FIG. 4 is a view taken along arrow 4 in FIG. Hereinafter, description will be given with reference to FIGS.
A grip 121R that the driver grips when riding is provided at the right tip of the steering handle 26, and a lever bracket 124 is provided inside the grip 121R. The lever bracket 124 has a master cylinder described later. A brake lever 113 for applying a force to is provided to be operable.

In the steering handle 26, a master cylinder 54 that converts the operating force of the brake lever 113 into hydraulic pressure is provided inside the lever bracket 124, and a part of the master cylinder 54 communicates with the master cylinder 54. A reserve tank 114 for storing excess brake fluid is attached, and an inspection window 126 for checking the amount of brake fluid is provided in the reserve tank 114.
The master cylinder 54 provided with the reserve tank 114 is attached to the steering handle 26 via a bracket portion 127.

The reserve tank 114 includes a front wall 131 that faces the front of the vehicle, a rear wall 132 that faces the rear of the vehicle, an inner wall 133 that faces the center of the vehicle, an outer wall 134 that faces the side of the vehicle, and an upper side of the vehicle. It is a box including a cover body 135 that faces it.
The reserve tank 114 provided in the brake master cylinder device 130 makes the outer wall 134 narrower than the inner wall 133 so that the front wall 131 is inclined rearward of the vehicle with respect to the steering handle 26.

  The inner wall portion 133 is composed of two surfaces formed so as to protrude toward the center of the vehicle when the vehicle is viewed from above. These two surfaces include a large side surface 141 having a large area and the large surface 141. The large side surface 141 is provided with a flat portion 143, and an inspection window 126 is provided on the flat portion 143.

  The lid body 135 includes a first tightening portion 151 provided in the vicinity of the front end of the small side surface 142 and a second tightening portion 152 provided in the vicinity of the rear end of the rear wall portion 132. And is attached to the tank body 154 side.

5 is a cross-sectional view taken along line 5-5 of FIG. Note that the internal structure of the master cylinder is omitted.
The master cylinder 54 is attached to the steering handle 26 via a bracket portion 127, and a concave portion 145 is formed in which a lower half portion 132Lo of the rear wall portion 132 constituting the reserve tank 114 is recessed toward the front of the vehicle. The distance (H) in the height direction from the steering handle center 26 </ b> C to the reserve tank upper surface 114 </ b> L is reduced by bringing the steering handle 26 close to the recess 145 as compared with the case where the recess 145 is not formed.
In the figure, reference numeral 128 denotes a seal member provided in the reserve tank 114.

  A concave portion 145 is provided in the lower half portion 132Lo of the rear wall portion 132, and the steering handle 26 is brought close to the concave portion 145, so that the front wall portion 132 of the reserve tank 114 is directed from the steering handle center 26C to the front of the reserve tank 114. The distance (W) to the wall part 131 can also be shortened.

The operation of the brake master cylinder device described above will be described next.
3 and 4, in the brake master cylinder device 130 attached to the steering handle 26 of the vehicle, the reserve tank 114 is a box including the inner wall portion 133, and the inner wall portion facing the vehicle center. An inspection window 126 is provided at 133.

  Conventionally, when the inspection window 126 is provided on the rear wall 132 facing the rear of the vehicle, the inspection window 126 may be difficult to see because the steering handle 26 blocks the inspection window 126.

  In this case, in order to prevent the inspection window 126 from being obstructed by the steering handle 26, the reserve tank 114 is shifted upward so that the inspection window 126 of the reserve tank 114 is positioned above the steering handle 26. It was arranged.

  In order to ensure the visibility of the inspection window 126, when the reserve tank 114 is arranged above the steering handle, the reserve tank 114 protrudes above the steering handle 26. There was room for improvement in appearance.

  In this regard, in the present invention, since the inspection window 126 is provided on the inner wall portion 133 provided inward of the vehicle, it is not necessary to shift the reserve tank 114 above the steering handle 26. Since the reserve tank 114 is not disposed above the steering handle 26, the amount of protrusion of the reserve tank 114 from the steering handle 26 can be suppressed, and the appearance around the steering handle 26 can be enhanced. In addition, the inspection window 126 can be easily seen. That is, according to the brake master cylinder device 130 according to the present invention, it is possible to achieve both the maintainability of the reserve tank 114 and the appearance of the vehicle.

  Referring to FIG. 5, a recess 145 is formed by recessing the lower half 132Lo of the rear wall 132 toward the front of the vehicle, the steering handle 26 is brought close to the recess 145, and the reserve tank upper surface 114L from the steering handle center 26C. The distance (H) was reduced.

  If the distance (H) from the steering handle center 26C to the reserve tank upper surface 114L is reduced, the height of the reserve tank 114 can be brought close to the height of the steering handle. If it does so, the quantity which the reserve tank 114 protrudes in the height direction from the steering handle 26 can be suppressed, and the external appearance property of a vehicle can be improved further.

  With such a recess 145, the distance (W) from the steering handle center 26C to the front wall 131 of the reserve tank 114 can be reduced toward the rear wall 132 of the reserve tank 114. The master cylinder 54 to which the reserve tank 114 is attached can be arranged close to the center 26C of the steering handle.

  If the distance (H) in the height direction and the distance (W) can be shortened, the area around the steering handle 26 can be collected neatly. Then, the appearance around the steering handle 26 can be further enhanced.

  Although the present invention is applied to a motorcycle in the embodiment, it can also be applied to a tricycle and can be applied to a general vehicle.

  The present invention is suitable for a motorcycle in which a steering wheel is provided with a brake master cylinder device.

1 is a left side view of a vehicle according to the present invention. 1 is a plan view of a main part of a motorcycle provided with a brake master cylinder device according to the present invention. It is a top view of the steering handle in which the brake master cylinder device concerning the present invention is attached. FIG. 4 is a view taken in the direction of arrow 4 in FIG. 3. FIG. 5 is a sectional view taken along line 5-5 of FIG.

Explanation of symbols

  26 ... Steering handle, 26C ... Steering handle center, 54 ... Master cylinder, 113 ... Brake lever, 114 ... Reserve tank, 114U ... Reserve tank upper surface, 126 ... Inspection window, 130 ... Brake master cylinder device for vehicle, 131 ... Front wall 132, rear wall portion, 132Lo, lower half portion of the rear wall portion, 133, inner wall portion, 134, outer wall portion, 141, large side surface, 142, small side surface, 143, flat portion.

Claims (2)

A master cylinder for converting the operating force of the brake lever into hydraulic pressure, a reserve tank attached to the master cylinder for storing excess brake fluid, and an inspection window provided in the reserve tank for checking the amount of the brake fluid. The reserve tank is a box including a front wall portion facing the vehicle front, a rear wall portion facing the vehicle rear, an inner wall portion facing the vehicle center, and an outer wall portion facing the vehicle side. In the brake master cylinder device for a vehicle, the front wall portion is inclined backward with respect to the steering handle by narrowing the outer wall portion from the inner wall portion.
The inner wall portion includes two surfaces formed so as to protrude toward the center of the vehicle when the vehicle is viewed from above. These two surfaces include a large side surface having a large area and the large side surface. A brake master cylinder device for a vehicle, comprising a small side surface having a smaller area, wherein the large side surface is provided with a flat portion, and the flat portion is provided with the inspection window.   A recess is formed in which the lower half of the rear wall is recessed forward of the vehicle, and the distance from the center of the steering handle to the upper surface of the reserve tank is reduced by bringing the steering handle close to the recess. The vehicle brake master cylinder device according to claim 1.

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