JPH0194089A - Rear-wheel brake operating device for motorcycle - Google Patents

Abstract

PURPOSE: To facilitate braking, whether a vehicle turns rightward or leftward, by pivoting a pair of right and left brake pedals, each of which can singly operate a rear wheel brake, to a vehicle body while bringing the pedals close to right and left steps. CONSTITUTION: A driver can normally control a rear wheel brake 20r by using either the right or left foot resting on steps 8, 8' to operate the corresponding brake pedal 9 or 9'. Therefore, single-footed ground touch and rear wheel brake control can be performed easily at the same time even during a turn in either the right or left direction.

Description

DETAILED DESCRIPTION OF THE INVENTION A6 Object of the Invention (1) Industrial Application Field The present invention relates to a rear wheel brake operating device for a motorcycle, which has a pair of left and right steps projecting from the bottom of the vehicle body.

(2) Prior Art In conventional motorcycles, only one brake pedal for operating the rear wheel brake is provided near the right step.

(3) Problems to be solved by the invention When a motorcycle rides on rough terrain, as a turning method, the rider places one foot on the side in the direction of the turn on the ground and takes a posture to balance the body tilted in the direction of the turn. This is commonly done. In this case, as mentioned above, in a motorcycle that only has a brake pedal on the right side step, even if the left foot touches the ground during a left turn, the brake pedal is operated with the right foot placed on the right side step, and the rear wheel brake is applied slightly. However, during a right turn, it is difficult to simultaneously touch the ground with the right foot and control the rear wheel brake.

The present invention has been made in view of the above circumstances, and is designed to enable the rider to always control the rear wheel brake with the foot applied to the other step, even when the rider touches the ground with either the left or right foot while the motorcycle is turning. An object of the present invention is to provide a rear wheel brake operating device for a motorcycle.

B0 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a pair of left and right brake pedals, each of which can actuate the rear wheel brakes independently, in the vicinity of the left and right steps, respectively. It is characterized by being pivotally supported on the vehicle body.

(2) Effect According to the above configuration, the operator of the motorcycle can always control the rear wheel brake by operating the corresponding brake pedal with either the left or right foot placed on the step.

(3) Examples Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. A motorcycle M has a power unit 2 mounted in the center of a body frame l, and a front fork 4 supporting a front wheel 3f mounted on the body frame. A rear fork 5 is connected to the front end of the rear fork 1 in a steerable manner and supports the rear wheel 3r, and is connected to the rear Q2 of the vehicle body frame 1 in a vertically swingable manner. 6 is interposed.

Further, a seat 7 for an operator to sit on is provided at the upper part of the vehicle body frame 1, and a pair of left and right steps 8, 8' are provided on both sides of the lower part of the vehicle body frame 1, respectively, and extend outward.

Furthermore, a pair of left and right brake pedals 9, 9' are mounted on both sides of the lower part of the vehicle body frame 1 with horizontal pivots 10, 10.
It is pivoted via '. In this case, these brake pedals 10.10' are located close to the steps 8.8' on the same side, respectively, so that they can be depressed by the driver's foot applied to the step 8.8' on the same side. It will be arranged as follows.

The right brake pedal 9' is integrally provided with an operating arm 9'a extending rearward of a pivot 10', and the rear end of the operating arm 9'a and the left brake pedal 9 are interlocked and connected by a Bowden wire 11. The Bowden wire 11 consists of an inner wire 12 that connects both ends to the operating arm 9'a and the left brake pedal 9, and an outer wire 13 that is inserted through the inner wire 12 and supported at both ends by a pair of left and right brackets 14 and 14'. ing.

A return spring 15 is installed between the right side bracket 14' and the actuating arm 9'a to urge the right side brake pedal 9' in the upward return direction, and between the left side bracket 14 and the left side brake pedal 9, the return spring 15 is compressed. An auxiliary spring 16 is provided to provide a certain tension to the inner wire 12. This auxiliary spring 1
The set load of 6 is set to be weaker than that of the return spring 15.

Note that the left side bracket 14 is fixed to the vehicle body frame 1,
The right side bracket 14' is fixed to a mask cylinder 17, which will be described later.

In the middle part of the operating arm 9'a of the right brake pedal 9',
The lower end of the piston loft 18 of the mask cylinder 17 attached to the vehicle body frame l is connected. When the mask cylinder 17 has its piston loft 18 pushed up,
Hydraulic pressure is output from an output boat 19 at the upper end.

The output boat 19 of the mask cylinder 17 is connected to a hydraulic conduit 21 to a hydraulic chamber of a rear wheel brake 2Or for braking the rear wheel 3r.
connected via. Therefore, when hydraulic pressure is output from the output boat 19, the hydraulic pressure is transmitted to the rear wheel brake 20r via the hydraulic conduit 21, and can operate the rear wheel brake 20r.

The power unit 2 has an engine 22 and an automatic transmission 23 as main components, and transmits the power of the engine 22 to the human-powered members of the automatic transmission 23 via a primary reduction gear 24. The output of this automatic transmission 23 is the secondary reduction gear 2
5 to the rear wheels 3r.

The automatic transmission 23 is equipped with a clutch mechanism, and a clutch lever 26 for operating the clutch mechanism is pivotally supported on a steering handle 27 at the upper end of the front fork 4 in close proximity to a left grip 27a thereof. Further, the steering handle 27 includes a front wheel 3 near the right side grip 27b.
A brake lever 28 for operating a front wheel brake 2Of for braking f is pivotally supported.

FIG. 4 shows an example of the automatic transmission a23. The automatic transmission 23 includes a swash plate hydraulic pump 50 that is driven from the engine 22 via a primary reduction gear 24 and a swash plate hydraulic morph 51 that drives the rear wheels 3r via a secondary reduction gear 25. These are arranged coaxially and interconnected by a hydraulic closed circuit 52.

The angle of the swash plate of the hydraulic pump 50 or the hydraulic motor 51 (in the illustrated example, the swash plate 53 of the hydraulic motor 5I) is controlled by an automatic control device (not shown).
The capacity ratio between the hydraulic pump 50 and the hydraulic pump 50, that is, the gear ratio, is controlled steplessly. In this way, when the swash plate 53 is controlled by the automatic control 'R' filling device, there is no need to equip the vehicle body with a change pedal, which makes it easier to install the brake pedals 9, 9' on the left and right sides.

A short-circuit path 54 connecting the suction side and the discharge side of the hydraulic pump 50 is connected to the hydraulic closed path 52, and a clutch valve 55 is provided in this short-circuit path 54. The clutch valve 55 is opened and closed by the thalasso-tire lever 26. When the clutch valve 55 is opened, the hydraulic pump 50 is short-circuited and the hydraulic transmission between the hydraulic pump 50 and the hydraulic morph 51 is interrupted, which is a so-called thalasso-off state. can get.

Further, a replenishment pump 56 driven from an input member of the hydraulic pump 50 is connected to the hydraulic closed circuit 52 via check valves 57 and 58. This replenishment pump 56 replenishes the hydraulic closed circuit 52 with leaked hydraulic oil.

Next, the operation of this embodiment will be explained.

Now, when the operator of the motorcycle M depresses the right brake pedal 9' with his right foot placed on the right step 8', the operating arm 9'a swings upward and pushes up the piston rond 18, causing the mask cylinder to 17 is the output boat 19
Outputs hydraulic pressure from the rear wheel brake 20r using the hydraulic pressure.
can be operated.

At this time, the upward movement of the operating arm 9'a compresses the return spring 15 and pushes the right end of the inner wire 12, so that the pressing action of the auxiliary spring 16 is also added, causing the left brake pedal 9 to swing downward. , does not in any way prevent the right brake pedal 9' from being depressed.

When the right brake pedal 9' is released, both brake pedals 9,9' return to their original positions due to the repulsive force of the return spring 15, and the rear wheel brake 2Or returns to its inoperative state.

Furthermore, when the left foot is placed on the left step 8 and the left brake pedal 9 is depressed, the operating arm 9'a of the right brake pedal 9' is swung upward via the inner wire 12. The rear wheel brake 20r can be operated by the output hydraulic pressure of the mask cylinder 17 in the same way as when the driver depresses the pedal.

If the left brake pedal 9 is released, both brake pedals 9,9' can be returned to their original positions by the repulsive force of the return spring 15 in this case as well, and the rear wheel brake 20r can be returned to the inoperative state.

In this way, the operator of the motorcycle M performs step 8.8'
Since you can always control the rear wheel brake 2Or by operating the corresponding brake pedal 9.9' with either left or right foot applied to the brake pedal, you can simultaneously touch the ground with one foot and control the rear wheel brake even when turning in either the left or right direction. This can be easily done, and especially when the change lever is omitted by adopting the automatic transmission 23 as in the embodiment of the present invention, it is possible to concentrate on one-foot ground contact and rear wheel brake control without thinking about the change operation. It is advantageous to be able to

If a manual multi-speed transmission is employed, the change lever may be disposed close to either the left or right brake pedal 9 or 9'.

Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6. The left and right brake pedals 9°9' each have an operating arm 9a extending rearward of the pivot IO, 10';
9'a, and a pair of left and right mask cylinders 30 each operated by these operating arms 9a and 9'a.
．． 30' is attached to the vehicle body frame 1.

These mask cylinders 30 and 30' each include a cylinder main body 31 fixed to the vehicle body frame 1, an upper hydraulic chamber 32 and a lower replenishing oil chamber 3 inside the cylinder main body 31.
3, a return spring 35 that urges the piston 34 downward, and a piston loft 36 that connects the lower end of the piston 34 to the corresponding operating arm 9a, 9'a. An output port 37 connected to the hydraulic chamber 32 is provided at the upper end of the main body 31, and an example of the output port 37 is an oil sump hole 38 and a relief boat that communicates between the oil sump hole 38 and the hydraulic chamber 32 at the lowering limit of the piston 34. 39 and
A supply boat 40 is provided that constantly communicates between the oil sump hole 38 and the replenishment oil chamber 33.

An oil reservoir 41 is connected to the oil reservoir hole 38 of the left mask cylinder 30 via a conduit 42, and an output port 37 of the left mask cylinder 30 and the oil reservoir hole 38 of the right mask cylinder 30' are connected via a conduit 43. The output port 37 of the right mask cylinder 30' is connected to the rear wheel brake 2Or via the hydraulic conduit 21.

A well-known cup seal 44 is attached to the upper end of the piston 34 of each mask cylinder 30, 30' to allow the replenishment of hydraulic oil from the replenishment oil chamber 33 to the hydraulic chamber 32 when the pressure in the hydraulic chamber 32 is reduced. ing.

Since the other configurations are the same as those of the previous embodiment, the same reference numerals are given to the parts corresponding to those of the previous embodiment in the drawings.

When the right brake pedal 9' is depressed, the operating arm 9'a moves the piston loft 36 and piston 34 of the right mask cylinder 30' upward. Then, in the right mask cylinder 30', after the cup seal 44 of the piston 34 crosses in front of the relief boat 39, hydraulic pressure is generated in the hydraulic chamber 32, and the hydraulic pressure is transmitted from the output port 19 through the hydraulic conduit 21 to the rear wheel brake 2Or. can be transmitted to and activated.

Further, when the right brake pedal 9' is released and the left brake pedal 9 is depressed, the operating arm 9a moves the piston rond 36 and the piston 34 of the left mask cylinder 30 upward. Then, the left mask cylinder 30
After the cup seal 44 of the piston 34 passes in front of the relief boat 39, hydraulic pressure is generated in the hydraulic chamber 32, and the hydraulic pressure is transmitted from the output boat 37 through the conduit 43 to the oil sump hole 38 of the right mask cylinder 30'. The relief boat 39 of the mask cylinder 30' and the hydraulic chamber 3
2. The output boat 37 and the hydraulic conduit 21 are sequentially connected to the rear wheel brake 20r so that it can be operated.

In this embodiment, when one brake pedal 9 or 9' is depressed, the mask cylinder 30' or 30 connected to the other brake pedal 9' or 9 is not operated, so that the other brake pedal 9' or 9 is depressed. It won't move you.

C8 Effects of the Invention As described above, according to the present invention, the pair of left and right brake pedals, each capable of independently operating the rear wheel brake, are pivoted to the vehicle body in close proximity to the left and right steps, respectively, so that the operator of the motorcycle can The rear wheel brake can be controlled at all times by operating the corresponding brake pedal with either the left or right foot applied to the step, and therefore, when the motorcycle is turning, regardless of the direction of the turn, one foot is in contact with the ground. The rear wheel brakes can be easily controlled at the same time.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a side view of a motorcycle equipped with a device of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a schematic view thereof. FIG. 4 is a schematic diagram of an automatic transmission, FIGS. 5 and 6 show a second embodiment of the present invention, and FIG. 5 is a rear view of a motorcycle equipped with the device of the present invention. FIG. 6 is a longitudinal developed view of the main part of the device of the present invention. M...Motorcycle, 1...Body frame, 8, 8'...Left, right side step, 9,9'...Left, right brake pedal, 20r.
...Rear wheel brake patent applicant: Agent for Honda Motor Co., Ltd.
Patent Attorney Ken Ochiai Figure 5

Claims (1)

[Claims] A rear wheel brake operating device for a motorcycle, which is provided with a pair of left and right steps protruding from the bottom of the vehicle body, in which a pair of left and right brake pedals each capable of independently operating the rear wheel brakes are installed close to the left and right steps on the vehicle body. A rear wheel brake operating device for a motorcycle, characterized by being pivotally supported on a motorcycle.