JPS5875462A - Cooling device for retarder - Google Patents

Abstract

PURPOSE:To impove the performance of cooling by the small-sized device without requiring a radiator, etc. exclusive for the retarder by forming the short- circuit ring of a retarder unit by an annular pipe and mounting a means circylating the coling water of an engine into the pipe. CONSTITUTION:The retarder unit 9 is provided with a magnetic square pillar- shaped iron core 10, a coil bobbin 13, which is fitted to the drum section of the iron core and on which an excitation coil 11 is wound, and the short-circuit ring 14 fitted at the nose of the iron core 10. The nose of the iron core 10 is set up while being adjoined to manetic tees 6, and the tees 6 are excited and magnetized if corrents are flowed through the excitation coil 11 when the iron core 10 is opposed to the tees 6. A hollow conductive pipe 16, an electric insulating tube 17 wrapping the conductive pipe and inflow and outflow pipes 18, 19, which are communicated with the conductive pipe 16 and circulate a refrigerant into the pipe 16 are mounted to the short-circuit ring 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for an electromagnetic retarder, which is a deceleration brake for a vehicle.

The present applicant has invented a new electromagnetic retarder as a vehicle deceleration brake, and has filed a patent application filed at the same time as this application.

In this electromagnetic retarder, the retarder rotor is a flywheel that is attached to the crankshaft between the engine and the transmission, and the magnetic field that excites the flywheel is connected to the housing of the flywheel. This is a fixed retarder unit including a short-circuit ring, and even if the engine becomes smaller and lighter and the total displacement decreases, it still provides braking force commensurate with the gear ratio of the transmission, just like conventional engine brakes. It is an excellent retarder that does not require a special propeller shaft, is lightweight and easy to control.

Conventional electromagnetic retarder cooling devices eliminate ohmic heat due to eddy currents generated in a magnetic disk around which an excitation coil is wound when it is rotated in a magnetic field created by this coil. It was designed to be cooled by the iron part of the disk and the fins of the rotor. In other words, this cooling device uses air cooling to cool a disc, which is a rotating body.
The entire rotating body, including the heat generating part, had to be cooled, and in order to improve the cooling capacity, it was necessary to increase the size of the iron parts and rotor fins.

The present invention solves the drawbacks of the conventional electromagnetic retarder cooling device described above, and in a new electromagnetic retarder, the heat generating part itself can be directly cooled, and a cooling method using water cooling is used in common with the engine. The purpose of the present invention is to provide a cooling device that is small in size and has a high cooling capacity.

In the present invention, a short-circuit ring fixed to a flywheel housing or made of tardane is formed by an annular pipe,
The present invention is characterized in that the pipe is provided with means for circulating the cooling water for the engine.

Embodiments of the present invention will be explained in detail below based on the drawings.

FIG. 1 is a block diagram of a cooling device according to an embodiment of the present invention. 1st
In the figure, a magnetic flywheel 5 is attached to a crankshaft 3 between an engine 1 and a transmission 2. As shown in FIG. A plurality of magnetic teeth 6 are formed on the outer surface of the flywheel 5.

Retarder units 9 are attached to the upper and lower parts of the housing 7 of the flywheel 5. This flywheel 5 t-1'J acts as a tartar rotor, and the retarder unit 9#'i acts as a field that excites the magnetic teeth 6 of this flywheel 5.

FIG. 2 is an enlarged external perspective view of this retarder unit 9. In FIG. 2, a retarder unit 9#i, a magnetic prismatic iron core 1o, a coil winding frame 13 fitted onto the body of the iron core 1o and around which an excitation coil 11 is wound, and an iron core 1o.
A short-circuit ring 14 is fitted to the tip of the short-circuit ring 14. This iron core 10
The tip of the iron core 1 is provided close to the magnetic teeth 6.
When a current is applied to the excitation coil 11 when the tooth 0 faces the magnetic teeth 6, the opposing magnetic teeth 6 are excited and magnetized.

Four bolt holes are drilled at the base end of this iron core 10,
The iron core 10 #'i is screwed onto the housing 7 with four magnetic bolts 15. Further, the short circuit ring 14 is connected to a hollow conductive pipe 16, an electrically insulating tube 17 that encloses the conductive pipe 16, and is connected to the conductive pipe 16 to circulate a cooling medium, which will be described later, in the conductive pipe 16. An inflow pipe 18 and an outflow pipe 19 are provided. Here, the electrically insulating tube 17 may be omitted, or may be treated with butterfly coating or the like. Furthermore, the electric terminals 21.2 of the excitation coil 11 are provided on the surface of the Howtangua.
2 is provided.

Returning to Figure 1, in front of the engine 1 is a radiator 2.
3 are connected via pipes 24 and 25. A thermostat 27 is installed inside the pipe 24, and a water pump 28 is attached to the pipe 25.

Further, the pipes 24 and 25 are connected by a bypass pipe 29. This water pump 28 is connected to a pipe 2 connected to a water jacket (not shown) in the cylinder block of the engine 1.
5 or send cooling water through the bypass pipe 29. A water manifold 31 is connected to the water jacket in the cylinder block, and water that cools the cylinder is circulated through the thermostat 27.

A characteristic feature of the present invention is that a retarder cooling pipe is connected to the cooling water system of the cylinder block. For example, a retarder cooling pipe 32 is piped from the water jacket in the cylinder block, and this The inflow pipe 18 of the retarder unit 9 is connected to the pipe 32, and the outflow pipe 19 of the retarder unit 9 is connected to the water manifold 31 via the return pipe 33'.
connected to and configured.

With such a configuration, the excitation coil 1 of the retarder unit 9
When a current is applied to the iron core 10 through the electric terminals 21 and 22, magnetic lines of force are generated in the iron core 10.

At this time, if the flywheel 5 is rotating and the magnetic teeth 6 are moving, the magnetic lines of force in the iron core 10 will change and a current will be generated, and this current will circulate through the conductive pipe 16 of the short circuit ring 14 and convert mechanical energy into heat. Convert into energy.

For this reason, the conductive pipe 16 generates heat, but the conductive pipe 16 is cooled by the pressure of cooling water, which is a cooling medium for the engine l, and is fed from the inflow pipe 118 through the retarder cooling pipe 32. The water used for cooling is returned to the water manifold 31 through an outflow pipe 19 and a return pipe 33.

When the temperature of this cooling water rises, the thermostand 27 is activated: the water is not forced to be cooled by the radiator 23, and the water is passed through the water pump 28, the retarder cooling pipe 32 and the inlet pipe 18, and then the conductive pipe 16. Cooling.

When the retarder constituted by the retarder unit 9 and the flywheel 5 which is the retarder rotor operates, the vehicle is being decelerated and the engine 1 is not being accelerated, so the cooling water in the radiator 23 is
The engine 1 and the retarder can be cooled alternately. Particularly during cold seasons, the retarder can prevent the cooling water from cooling properly.

In the above example, the retarder cooling pipe 32 is connected to the water jacket in the cylinder block, and the return vibrator 33 is connected to the water manifold 31. , return pipe 33.

Alternatively, a solenoid valve may be provided in the middle of the retarder cooling pipe 32, and the solenoid valve may be configured to be opened only when the retarder is operated.

As described above, according to the present invention, by configuring the engine cooling water to be circulated within the short-circuit ring of the retarder unit, which is the heat generating part of the retarder, the radiator, water pump, etc. exclusively for the retarder are specially equipped. There is no need to install it, and all the hot parts themselves can be directly cooled, so the cooling effect is ml.
Moreover, it is possible to prevent the engine cooling water from being properly cooled during the cold season, and a compact device jIL with excellent cooling performance can be obtained.

As a result, even if the mechanical energy is very high, it is smoothly converted into thermal energy, and a retarder with high braking force can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a cooling device according to an embodiment of the present invention. FIG. 2 is an enlarged external perspective view of the retarder unit. 1... Engine, 2... Transmission, 3... Crankshaft, 5... Flywheel, 6... Magnetic teeth,
7...No-Using, 9-...Retarder unit, 1
0... Iron core, 11-- Exciting coil, 13... Coil winding frame, 14... Short circuit ring, 15... Bolt, 16...
...Conductive pipe, 17...Tube, 18...Inflow pipe, 19...Outflow pipe, 2], 22...Electrical terminal, 23...Radiator, 24.25...Pipe, 27 ---Thermostat, 28 ---Water pump, 2
9... Bypass pipe, 31... Water manifold, 32... Retarder cooling pipe, 33... Return pipe. 4I Fraudulent Applicant Hino Motors Co., Ltd. Attorney Attorney Naotaka Izu

Claims (1)

[Claims] (1) A retarder that includes a retarder unit that is fixed to a flywheel housing and includes an excitation coil and a short-circuit ring, and a retarder rotor that is attached to a crankshaft between an engine and a transmission and is excited by the retarder unit. A cooling device for a retarder, wherein the short-circuit ring is formed by an annular pipe, and the short-circuit ring is provided with means for circulating the engine cooling water within the pipe.