JPH0529381Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a brake device for a vehicle that includes a brake blower that is driven from the engine side to perform pumping work in the exhaust gas passage to brake the engine.

[Prior art] In general, for vehicles such as large trucks and buses, in addition to mechanical brakes that use frictional force to obtain braking force and stop the vehicle, mechanical brakes that directly absorb engine power to generate braking force are used. A deceleration brake, such as an exhaust brake, is provided to assist in the action of the mechanical brake.

Here, the applicant is considering a new braking system. As shown in Fig. 2, this system connects the crankshaft d of an internal combustion engine a to a blower c (hereinafter referred to as the "brake blower") that performs pumping work in the exhaust gas passage b. By driving with a, engine braking force can be added in addition to the conventional mechanical brake or deceleration brake. A brake blower c that is driven from the engine a side to generate braking force is provided with a throttle valve e that controls the braking force by throttling its suction side, discharge side, or both. Further, this brake blower c is connected to the crankshaft d of the engine a via a speed increasing device g that increases the rotation speed of the brake blower c with respect to the clutch f and the crankshaft d.

[Problems to be solved by the invention] As shown in FIG. 3 as an actual installation layout of the brake blower c mentioned above, the brake blower c is connected in the middle of the propeller shaft h connected to the crankshaft d. It is possible that However, the propeller shaft h is equipped with a brake blower c during braking.
In addition to the braking force, normally generated braking forces such as engine braking and exhaust braking also act, resulting in the addition of large torsional torque, which raises the problem of increasing the required strength of the propeller shaft h. Furthermore, i
is the final reduction gear, j is the axle, and k is the wheel.

[Means for solving the problem] The present invention provides a brake blower that is installed in the exhaust gas passage and is driven by engine power to perform pump work and generate engine braking force, by connecting it to the ring gear of the final reduction gear. configured by connecting to.

[Operation] Regarding the operation of the present invention, by connecting the brake blower to the ring gear of the final reduction gear and applying braking, the engine power is input to the final reduction gear part and the wheels are directly braked, thereby blowing the propeller. It is designed to reduce the torsional torque transmitted to the shaft etc.

[Embodiment] A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 1, a brake blower 1 is disposed in an exhaust gas passage 2 and is driven by engine power to perform pumping work, thereby consuming engine power and generating engine braking force. This brake blower 1
generates a considerable braking force in accordance with throttling control of a throttling valve 3 provided on the suction side, the discharge side, or both. A speed increasing device 5, a clutch 6, and an input gear 7 are connected to the input shaft 4 of the brake blower 1 as a transmission system for inputting engine power thereto.

In this invention, the brake blower 1,
Specifically, an input gear 7 forming the input end is directly connected to an axle 8 to drive wheels, and is connected within a final reduction gear to transmit engine power. To explain according to the figure, the input gear 7 is located in the final reduction gear case 9.
A drive pinion shaft 10 that is directly connected to a propeller shaft on the engine side is meshed with a ring gear 12 that is connected to an axle shaft 8 on the wheel side via a differential device 11.

The operation of the above configuration will be described.

When braking the vehicle, the clutch 6 is connected, and part of the engine power transmitted to drive the wheels is input from the ring gear 12 to the brake blower 1 via the input gear 7, speed increaser 5, etc. The brake blower 1 performs pumping work using the transmitted engine power, consumes the transmitted power, and generates engine braking force.

Here, by connecting the brake blower 1 to the ring gear 12 closer to the wheel than the propeller shaft,
The braking force of the brake blower 1 can be applied directly to the axle 8 or the wheels, compared to the case where the braking force of the brake blower 1 is input to the propeller shaft to which other braking forces such as exhaust braking force are applied as described above. As a result, the torsional torque applied to the propeller shaft can be reduced. That is, the exhaust brake etc. are generated by the rotational force of the wheels being transmitted to the engine via the propeller shaft.At this time, the braking force is applied in advance by the brake blower 1 at the ring gear 12 position, so that the rotational force of the wheels is transmitted to the engine via the propeller shaft. By reducing the rotational force transmitted to the propeller shaft, the torsional torque acting on the propeller shaft can be reduced. This makes it possible to reduce the strength required for the propeller shaft.

Incidentally, during normal driving, the ring gear 12 and the brake blower 1 are separated by the clutch 6 to ensure normal driving.

[Effects of the Invention] In summary, the present invention provides the following excellent effects.

By connecting the brake blower to the ring gear of the final reduction gear, it is possible to directly brake the wheels and reduce the torsional torque applied to the propeller shaft, etc., and the required strength can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a preferred embodiment of the present invention;
FIG. 2 is a system diagram explaining the functions of the brake blower, and FIG. 3 is a schematic diagram showing the layout of a conventional brake blower. In the figure, 1 is a brake blower, 2 is an exhaust gas passage,
12 is a ring gear.

Claims (1)

[Scope of utility model registration request] A brake device for a vehicle, characterized in that a brake blower installed in an exhaust gas passage and driven by engine power to perform pump work and generate engine braking force is connected to a ring gear of a final reduction gear.