JPS58128953A - Hydraulic brake servo by liquid pressure - Google Patents

Abstract

PURPOSE:To simplify construction of mounting a pump and improve appearance thereof by driving the pump for a hydraulic brake servo with the pump by the use of a hydraulic motor driven by pressurized liquid from an engine lubricating pump. CONSTITUTION:A pump 2 driven by an engine 1 circulates lubricating oil through an oil pan 3, a hydraulic motor 6 and the engine 1. Thus, the hydraulic motor 6 is revoluted to drive a pump 11 and supply pressurized liquid to a hydraulic brake servo 13. Hence, said servo 13 generates a braking pressure with the operation of a front brake 15. Thus, when the hydraulic motor 6 is located in an inconspicuous position below a seat of a motorcycle for example, it simplifies the mounting construction of said motor 6 without damaging the appearance of same.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic booster including a hydraulic booster and a pump that supplies pressure fluid to the hydraulic booster.

Conventionally, brake boosters include a hydraulic pressure boosting mechanism that generates brake fluid pressure by boosting the brake operating force according to the brake operating force, and a pressure fluid that causes the hydraulic pressure boosting mechanism to perform the boosting operation. There are known devices equipped with a pump for supplying the air. This pump is usually mounted outside the engine and
■It is linked to the engine via a belt.

Although this type of configuration does not pose a problem in automobiles, which have a relatively large amount of installation space, it becomes a serious problem when installing a brake booster on a two-wheeled vehicle, since there is almost no installation space available. Become. In particular, installing the pump that supplies pressurized fluid to the hydraulic booster mechanism outside the engine has a significant impact on the aesthetics of the engine area, which can be said to be the center of the appearance of a motorcycle, so it is important to install the pump in a good manner. Coupled with the lack of sufficient installation space, this was actually extremely difficult.

In view of these circumstances, the present invention separates the pump from the engine and places it in a free location, for example, under the seat where it is not noticeable in appearance, and utilizes a fluid pressure motor as the driving source for the pump. Pressure fluid is supplied to the fluid pressure motor from a lubrication pump that supplies pressure fluid to a lubrication passage inside the engine.

The present invention will be described below with reference to the illustrated embodiments. (1) is an engine, and (2) is a lubricating pump provided in the engine.
) is linked to the crankshaft. This pump (2
) sucks lubricating oil from the oil pan (3) inside the engine (1) and discharges the lubricating oil into a passage (4) inside the engine (1). Lubricating oil can be supplied to the hydraulic motor (6) through a conduit (5) that opens to the outside from a required position and is connected to the conduit (5). And this fluid pressure motor (6)
The oil discharged from the engine (
1) is returned to the interior and lubricates each part via the lubrication passage (8),
After cooling, it returns to the oil pan (3).

The fluid pressure motor (6) has a conventionally known configuration and is disposed at a location that is not visually noticeable, such as under the seat of a two-wheeled vehicle. The lubrication circuit that supplies pressure fluid to the fluid pressure motor (6) is generally used under low pressure conditions and the load is constant, so the fluid pressure motor (6)
It has conditions suitable for establishing a fluid pressure motor (
6) does not adversely affect the fluid pressure motor (6) or the lubricating parts in the engine fl). Furthermore, if necessary, the aisle (4)
A relief valve (9) for regulating the maximum pressure applied to the fluid pressure motor (6) may be provided on the upstream side of the lubrication passage (8), and a relief valve (10) for regulating the maximum pressure applied thereto may be provided on the upstream side of the lubricating passage (8).

Next, the fluid pressure motor (6) is provided with a pump (11) that is integrally configured with the fluid pressure motor (6) and driven by the operation of the fluid pressure motor (6), and the pressure from this pump (11) is The fluid is passed through the conduit (12) to the hydraulic booster (13).
). This hydraulic pressure boosting mechanism (1
3) has a conventionally known configuration, and is provided, for example, on the handlebar, front fork, etc., and its input shaft (14
) is linked to the front brake lever (15).

The brake fluid pressure obtained by the hydraulic pressure boosting mechanism (13) is applied to the front wheel cylinder 7) via the brake hose (16), and the hydraulic pressure boosting mechanism (13) The rabbit body discharged from the conduit (18)
The water can be refluxed to the pump (11) through the pump (11).

In the figure, (19) is a reservoir, but this reservoir 19) may be provided integrally within the pump (11) or within the hydraulic pressure boosting mechanism (13).

In the above configuration, when the engine (1) is operated, the pump (2) is operated accordingly, and the oil pan (3) is operated.
) is supplied to the fluid pressure motor (6) via the passage (4) and the conduit (5) to drive the motor (6) in rotation. When the motor (6) is driven to rotate, the pump (11) integrated with the motor (6) is driven to rotate and supplies pressure fluid to the hydraulic pressure boosting mechanism (13), and in this state, the front brake lever (
15) is squeezed to operate the input shaft (14), a boosting action using fluid pressure is performed, similar to a conventionally well-known hydraulic pressure boosting mechanism, and high brake fluid pressure is applied to the front wheel cylinder ( 17) to perform the braking action. Further, the lubricating oil supplied to the fluid pressure motor (6) is supplied to each m sliding portion via a conduit (7) and a lubricating passage (8).

In addition, in the above embodiment, all the mold of the discharged oil from the pump (2) is supplied to the fluid pressure motor (6), but this is not necessarily limited to this.
) Similar effects can be obtained even if the engine (1) uses a wet type Clara.

As described above, the present invention utilizes a pump driven by a fluid pressure motor as the second pump of the hydraulic booster, and the fluid pressure motor is supplied with pressure fluid from the first pump for lubricating the engine. As a result, the second pump can be installed in a free position separate from the engine, and the fluid pressure motor that drives the second pump can be connected to the engine through a conduit. Compared to the case where the second pump and the engine are connected by gears, shafts, etc., the configuration is simpler, and therefore it is easier to mount a hydraulic booster on the two-wheeled vehicle without spoiling its appearance. This effect can be obtained.

[Brief explanation of the drawing]

The figure is a system diagram showing one embodiment of the present invention.

Claims (1)

[Claims] A first pump that supplies pressure fluid to a lubricating passage inside the engine, a fluid pressure motor that is provided outside the engine and is operated by receiving pressure fluid from the first pump, and is operated in conjunction with the fluid pressure motor. a second pump that is
1. A hydraulic booster comprising: a hydraulic booster mechanism supplied with pressure fluid from a pump.