JPH0534348Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a blower brake that adds braking force to a vehicle by replacing the rotational force drawn from the vehicle with pump work, and utilizes the energy generated when the brake is activated. The present invention relates to a cooling device for a blower brake that cools a heat generating part.

[Conventional technology] Braking force is added to the vehicle in addition to conventional foot brakes and exhaust brakes by extracting rotational force from the vehicle's crankshaft and transmitting it to rotary blades such as tarchins and blowers to perform pump work. A so-called blower brake has been proposed. This blower brake is equipped with a clutch that engages and disengages the rotational force from the crankshaft, and a gear that adjusts the rotation speed.When the clutch is engaged and operated, the mechanical friction of these and the stirring friction of lubricating oil are used. I get a fever.

[Problems to be solved by the invention] However, conventional blower brakes do not have any effective means of suppressing heat generation other than using a large-capacity oil pump, and are prone to overheating. As a result, there was a problem of decreased durability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a blower brake cooling device that can solve the above problems, effectively cool heat generating parts such as gears, and improve the durability of the blower brake.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a blower brake that transmits rotational force extracted from a vehicle to a rotor blade via a clutch and a gear, and performs braking by the rotational resistance thereof. A fan shaft to which a cooling fan is attached is connected in series to a blower shaft to which a rotary blade is attached via a gear, and a crankshaft can be connected to and connected to the fan shaft via a clutch.

[Operation] When the clutch for operating the blower brake is turned on, the blower shaft and the fan shaft connected in series to the blower shaft through a gear rotate simultaneously. Then,
A cooling fan attached to the fan shaft actively blows air to heat-generating parts such as gears and clutches to cool them.

Moreover, this cooling fan not only cools the clutch etc., but also performs pumping work itself. That is, this cooling fan has a pump work function (fan brake function) in addition to its original function of a cooling fan.

[Embodiments] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a rotor blade constituting a blower of a blower brake, and the rotor blade 1 is housed in a housing (not shown) and is attached to one end of a blower shaft 3 rotatably supported by a bearing 2. . A planetary gear 4 is attached to the other end of this blower shaft 3.
A sun gear 40 is attached, and this sun gear 40
An internal gear 6 is meshed with the intermediate gear 5 through the intermediate gear 5.
This internal gear 6 is attached to one end of an input shaft 8 which is rotatably supported by a bearing 7. A shaft 9 rotatably supporting the center of the intermediate gear 6 is fixed to a gear casing 10.

One clutch plate 11a constituting a clutch 11 is attached to the other end of the input shaft 8, and the other clutch plate 11b is rotatable via a bearing 13 on a fan shaft 12 connected to the input shaft 8. It is attached to a sleeve shaft 14 supported by. This clutch 11 transmits or disconnects the rotational force from the crankshaft 15 of the engine to the rotor blade 1 side, and is housed in a clutch casing 16. A gear 17 is attached to the sleeve shaft 14, and a gear 18 attached to the crankshaft 15 meshes with this gear 17.

The gear casing 10 and the clutch casing 16 are provided with heat dissipation fins 19,
A cooling fan 20 is attached to a fan shaft 12 connected to the input shaft 8 in order to forcibly send air to these heat radiation fins 19 .

In this configuration, the clutch 11 is engaged when the blower brake is to be applied. That is, when the clutch plates 11a and 11b are engaged, the crankshaft 1
The rotational force from 5 is transmitted to the rotor blade 1 via the planetary gear 4, causing it to rotate. The pump work caused by the rotation of the rotor 1 generates a reaction force on the crankshaft 1.
Braking force will be added to 5. When the brake is operated, heat is generated from the heat generating parts of the gear 4 and the like due to the mechanical friction of the gear 4 and the clutch 11 and the agitation friction of the lubricating oil contained in the casings 10 and 16. When this brake is activated, the cooling fan 20 is driven via the fan shaft 2 connected to the input shaft 8 of the gear 4, so air is forcibly blown to the heat dissipation fans 17 of the casings 10 and 16, and the heat generating parts become effective. It will be cooled down. Moreover, since the cooling fan 20 also performs pumping work at this time, the braking force increases.

FIG. 2 shows a related technology developed at the same time as this embodiment in which the driving source for the cooling fan 20 is not taken from the input shaft 8 of the gear 4, but from the pressure air generated by the rotation of the rotor blade 1. ing. Therefore, input shaft 8
The fan shaft 12 is not connected to the fan shaft 12, and the clutch plate 11b and the gear 17 are attached to a shaft 31 rotatably supported by a bearing 30. Further, a chip turbine fan 32 constituting a cooling fan is installed opposite the casings 10 and 16, which are heat generating parts. This chip turbine fan 3
2 has a turbine chip 34 on the outer periphery of the fan part 33.
The turbine chip 34 is configured such that pressurized air is supplied to the turbine chip 34 through a branch passage 36 branched from an exhaust passage 35 of the blower 1. According to this, the pressure generated during the operation of the blower brake is supplied to the turbine chip 34 of the chip turbine fan 32 via the branch path 36 of the exhaust passage 35 to drive the chip turbine fan 32, and the fan section 33 is supplied to the turbine chip 34 of the chip turbine fan 32.
Due to the rotation of , air is forcibly blown to the heat radiation fins 19 of the heat generating section. In this case blower 1
Since the pressure supplied from the chip turbine fan 32 to the chip turbine fan 32 is heated, the chip turbine fan 32
vent the pressure air from the housing of the
The discharged pressurized air may be used for heating the driver's cab, blowing off water droplets during car washing, etc.

In the embodiment, the rotational force is extracted from the crankshaft 15 of the vehicle, but the rotational force may be extracted from a rotating part such as a wheel. In addition, the present invention is a turbo compound engine that uses exhaust gas to drive a turbine and returns the driving force to the crankshaft to increase the engine output.The present invention is designed to use the turbine to function as a blower during braking to obtain braking force. It can also be applied to turbine brakes.

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

Since the energy generated when the brakes are activated is used to cool the heat-generating parts via a cooling fan, the heat-generating parts can be effectively cooled, preventing overheating of the blower brake and improving durability. .

In addition, this cooling fan also has a pump work function (fan brake function) in addition to its original cooling fan function, so that the braking force is increased.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of a blower brake cooling device according to the present invention, and FIG. 2 is a diagram showing related technology developed at the same time as the present invention. In the figure, 1 is a rotary blade, 4 is a gear, 11 is a clutch, and 20 is a cooling fan.

Claims (1)

[Scope of utility model registration request] In a blower brake that transmits the rotational force drawn from the vehicle to the rotor blades via a clutch and gears and applies braking by the rotational resistance, the fan shaft to which the cooling fan is attached is connected to the blower shaft to which the rotor blades are attached, and the gear etc. A cooling device for a blower brake, characterized in that the crankshaft is connected in series through the fan shaft, and the rotation of the crankshaft can be interrupted or interrupted by a clutch connected to the fan shaft.