JPH0345602B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a retarder that generates electricity by utilizing a portion of the energy to be absorbed during braking of an automobile.

<Prior art> An electromagnetic retarder that has been commonly used generates eddy currents in the disk by rotating a disk in a magnetic field generated by a stator coil, and this eddy current generates kinetic energy. was converted into thermal energy to obtain braking torque. However, such conventional retarders are large in shape and weight, and it is necessary to provide heat dissipation fins on the disk to dissipate heat, so even when the retarder is not operated, the rotation of the disk is affected. Along with this, there was a problem that windage damage occurred and fuel efficiency deteriorated.

In order to solve this problem, a retarder has been proposed in which the retarder is configured with a generator and generates electricity by using a portion of the energy to be absorbed when braking the vehicle. However, all conventional retarders of this kind were constructed integrally with the engine and used the flywheel as the rotor of the retarder, so although the construction was simple, the retarder was attached to the rear of the engine. Due to this necessity, the mounting space for the engine became large, which resulted in a problem that the degree of freedom in design was lost. In addition, when the retarder is integrated with the engine as in the past, the shock caused by the operation of the retarder is applied to the propeller shaft, which accelerates the wear of the universal joint installed in the connecting part of the propeller shaft. There were also problems such as

<Problems to be Solved by the Invention> The present invention has been made in view of the above-mentioned circumstances, and can avoid problems caused by shock being applied to the engine, propeller shaft, etc. due to the operation of the retarder, and The object of the present invention is to provide an automobile retarder that can increase the degree of freedom in designing the engine, etc.

<Means for Solving the Problems> In order to solve the above problems, the present invention provides an automobile retarder configured with an inductor type generator, in which the rotor of the inductor type generator is fixed to a rotating shaft, and the rotor of the inductor type generator is fixed to a rotating shaft. The inductor generator housing is fixed to the front of the differential case. The front end of the rotary shaft is connected to the rear end of the propeller shaft, and the rear end of the rotary shaft is connected to the internal mechanism of the differential case.

<Function> In the automobile retarder configured as described above, the inductor type generator is not activated when the automobile is being driven normally, thereby reducing the load on the service brake equipped on the automobile. If necessary, for example, a retarder switch installed in the driver's seat is turned on. Then, current flows through the field coil of the inductor type generator to excite this coil, so this inductor type generator functions as a generator, and the energy commensurate with the work generated by this generation provides braking force to the car. Acts as.

By the way, since the housing of the inductor type generator that constitutes the retarder is fixed to the front surface of the differential case, the inductor type generator and the differential case move together. For this reason, even if the housing of the drive axle is displaced vertically due to an impact from the road surface, the housing of the inductor type generator moves up and down along with this housing (differential case), so the inductor type generator The height never changes. Additionally, since the retarder is constructed from an inductor generator, it is possible to obtain a large braking force despite its small size by setting the current supplied to the retarder's field coil to an appropriate value. . moreover,
Since the inductor generator housing is fixed to the front of the differential case, there is no need to increase the mounting space for the engine even if the retarder is made larger, and the underfloor space, which is normally not used effectively, can be saved. Since the retarder can be attached by using the retarder, the degree of freedom in design increases. Furthermore, since the rear end of the propeller shaft is connected to the internal mechanism of the differential case via the rotor of the inductor generator that constitutes the retarder, the shock caused by the operation of the retarder is transmitted to the propeller shaft or engine. Without this, it is also possible to improve the durability of the universal joint interposed in the connecting portion of the propeller shaft.

<Example> Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is a side view showing a schematic configuration of an embodiment of a retarder according to the present invention, in which a universal joint is connected to an output shaft 2 of a transmission 1 connected to an engine (not shown) via a clutch (not shown). The front end of the propeller shaft 4 is connected via the propeller shaft 3. In addition, an inductor type generator 6 is installed in the front of the differential case 5 that houses a differential mechanism (not shown).
This inductor type generator The rear end of the propeller shaft 4 is connected to the internal mechanism of the differential case 5 via the rotor of the generator 6.

The inductor type generator 6 has a circular housing 9 fixed to the front surface of the differential case 5 as shown in FIG.
The housing 9 houses a rotor 10 fixed to the rotating shaft 7. Inductor magnetic poles 11 are provided on the outer peripheral surface of the rotor 10 at predetermined pitches, and the stator is housed in a case 12 fixed to the outer periphery of the housing 9. As shown in FIG. 3, the stator is provided with a pole core 13 in a case 12 at a pitch of 1/2 of the inductor magnetic poles 11, and an armature coil 14 and a field coil 15 are wound around this pole core 13, respectively. It is constructed by equipping. Further, while the armature coil 14 is commonly wound across the two pole cores 13, the field coil 15 is wound one by one on each pole core 13, and these coils 13, A pole core 13 having a pole core 14 wound thereon is fixed to a case 12 via a stator yoke 16.

The retarder configured as described above operates when, for example, a retarder switch provided at the driver's seat is turned on. That is, when the retarder switch is turned on, the field coil 15 is discharged from the battery (not shown).
A current flows through the coil 15 to excite the coil 15 and magnetize the pole core 13. When the rotating shaft 7 rotates and the rotor 10 rotates in such a state,
At a certain instant, a magnetic circuit 17 is formed as shown in broken lines in FIG. After this, when the rotor 10 rotates by an angle corresponding to the pitch of the pole core 13, a magnetic circuit 18 as shown by the chain line in FIG. 3 is formed. These magnetic circuits 17,1
Each of the magnetic fluxes passing through the coils 8 interlinks with the armature coil 14 and its direction is completely reversed, and this change in magnetic flux causes the armature coil 14 to generate a power generation output.

When the inductor type generator 6 generates electricity in this way, it means that mechanical energy is supplied from the outside, and the consumption (supply) of this energy provides a braking action to the automobile. As the retarder operates, the load on the service brake is reduced.

Note that the power generation output obtained by the operation of the retarder is consumed by a resistor (not shown), or is used as a power source to be supplied to other electrical devices.

By the way, as mentioned above, the housing 9 of the inductor type generator 6 that constitutes the retarder is not directly attached to the engine as in the past, but is fixed to the front surface of the differential case 5, which is closer to the drive wheels than the propeller shaft 4. ing. For this reason, there is no need to expand the mounting space for the engine due to the installation of the retarder, and the retarder can be installed using space under the floor, which has not been effectively used in the past. In addition, since the retarder is configured with the inductor type generator 6, it is possible to obtain a strong braking force while reducing the shape and weight of the retarder.Moreover, when the suspension is displaced, the inductor type generator 6 Housing 9 of 6 is differential case 5
Since the housing 9 of the inductor type generator 6 moves up and down integrally with the axle housing, the height above the ground of the housing 9 of the inductor type generator 6 can be kept almost constant to avoid collisions with obstacles on the road. Furthermore, since the rotor 10 of the inductor generator 6 that constitutes the retarder is interposed between the rear end of the propeller shaft 4 and the internal mechanism of the differential case 5, the shock caused by the operation of the retarder can be prevented by any chance. It is not transmitted to the propeller shaft 4 or the engine,
It is also possible to improve the durability of the universal joints 3 and 8 interposed in the connecting portion of the propeller shaft 4.

<Effects of the Invention> As explained above, in the present invention, while the housing of the inductor type generator constituting the retarder is fixed to the front of the differential case, the housing of the inductor type generator constituting the retarder is fixed to the front side of the differential case, and the Because the end is connected to the internal mechanism of the differential case,
To increase the degree of freedom in design when installing a retarder, to make effective use of underfloor space, and to protect a universal joint, a propeller shaft, etc. from shock caused by the operation of the retarder, and improve their durability. You can also do it.

[Brief explanation of drawings]

FIG. 1 is a side view showing a schematic configuration of a retarder according to an embodiment of the present invention, FIG. 2 is a perspective view showing an overview of the retarder, and FIG. 3 is a main part showing the structure of a stator of the retarder. FIG. 3 is an enlarged developed cross-sectional view. 1... Transmission, 3, 8... Universal joint, 4... Propeller shaft, 5
...Differential case, 6...Inductor type generator, 7...
Rotating shaft, 10... rotor, 11... inductor magnetic pole,
13... Pole core, 14... Armature coil, 1
5... Field coil, 16... Stator yoke.

Claims (1)

[Claims] 1. An automobile retarder comprising an inductor type generator 6, wherein the inductor type generator 6 has a rotor 10 connected to a rotating shaft 7.
A housing 9 is attached to the front surface of the differential case 5, and a propeller shaft 4 is attached to the front end of the rotating shaft 7.
The rear end of the automobile retarder is connected to the internal mechanism of the differential case 5.