JPH0412681A - Generating unit employing deformation of tire as power - Google Patents

Abstract

PURPOSE:To generate power within a tire of an electric automobile by utilizing deformation of a rolling tire due to grounding pressure under traveling state. CONSTITUTION:Generating units are disposed, with same interval, on a magnetic path 1 secured to the rim 25 of tire wheel and a pull wire 14 is connected with a pull wire bonding section bonded to the tire. Grounding part, including the part to be influenced, is recessed in the wheel direction by the grounding pressure upon rolling of tire. When the deformed part is recovered as rolling of tire proceeds, the pull wire 14 loses its slack and stretched. Magnetic poles 3a, 3b in the generating unit intrudes or retracts into/from coils 2a, 2b because of loosening and stretching of the pull wire 14. Consequently, electromotive force is taken out from a take out terminal through the outside of wheel, a wire protection cover and a brush.

Description

[Detailed description of the invention] A4. Purpose of the invention Industrial application field In electric vehicles, the power consumption of storage batteries installed as motive power during driving is utilized by deformation of tires due to ground pressure during driving. This relates to generating power inside the tire, introducing the generated power into the vehicle body, charging the on-board storage battery, and replenishing the power while driving.

The onboard storage battery is charged by various devices (not shown) such as voltage adjustment, rectification, and cut-in installed inside the vehicle body.

Conventional technologyThe development of small, high-energy-density storage batteries for use in electric vehicles is slowly but steadily progressing.In order to fully popularize electric vehicles, it is necessary to charge them (full charge). There are cars equipped with solar collectors that replenish electricity while driving (continuously or intermittently, depending on the total distance that can be traveled), but there are cars equipped with solar collectors that replenish electricity while driving. Progress is desired.

Problems to be Solved by the Invention As available and unused power, in a running state,
Focusing on the deformation of rolling tires due to ground pressure, we installed a power generation device inside the tire that uses the deformation of the tire as power, and in order to charge the onboard storage battery with the generated power, electricity is introduced into the vehicle body while driving. The aim is to provide a device that will

If we were to use the deformation of tires that move around to move a power generator, the problem would be where in the tires to obtain power and how to do so. There are many difficulties in rotating a permanent magnet within a tire, withstanding centripetal force and centrifugal action, with a slip angle, and dealing with the movement of the point of application of frictional force due to the "torsional deformation" of a rotating tire. Therefore, there is no need to contradict each other, such as the reduction in power generation efficiency when adopting a method of moving magnetic poles in and out of the coil, the flow of air inside the coil, the means to extract electricity from the wheels whose direction changes by steering, and the means to introduce them into the vehicle body. The main issue is placement.

Means for Solving the Constituent Problems of the Invention FIG. 7 is a diagram showing that the ground contact portion of a tire is deformed due to ground pressure. No matter which direction the tire rotates, the parts other than the ground contact area, including the ground contact area, will return to their original shape as soon as the ground contact pressure is removed. FIG. 1 is a side view of the power generation device, and FIG. 2 is a plan view of the power generation device.
There are two N-turn coils 28-2b on both sides of ~6b, and the permanent magnet 3 is a modified type of U-shaped magnet.
The pole was set as 3b, and the S pole was set as 3a. The permanent magnet 3 is entirely made of ferrite molding or magnetic steel, and has an S pole and an N pole at the tip.
The coils 28 to 2b installed in the magnetic circuit 1 may be connected in series, such as by forming the poles with ferrite and connecting them with magnetic steel. A permanent magnet column 13 whose fulcrum is a movable plate 7 supported by the fixed shafts of the bearings 6a to 6b contains a permanent magnet 3, and the magnetic pole 3b is inserted into the coil 2b by compressing the spring θ by the tension of the pulling cable 14. . At the same time, magnetic pole 3a
escapes from the coil 2a.

When the pull line 14 is slack, the spring 5 is attached to the permanent magnet column 1.
3 is pushed up, the magnetic pole 3a is inserted into the coil 2a, and the magnetic pole 3b is pulled out from the coil 2b. Ferrite-formed permanent magnets are not necessarily strong against shock, 33b, 3
3a is a permanent magnet reinforced ball nut. The movable plate 7 has stoppers 12a to 12b, and the bearing fixed plate 8 has stoppers 12a to 12b to prevent the deformation of the tire from being large and the pulling cable 14 to become too loose and to prevent the magnetic pole 3a from being excessively inserted into the coil 2a. A stopper receiving ring 11 made of an elastic material is provided.

As shown in FIGS. 5 and 6, the tow rope 14 is bonded to a portion named an inner liner 31 on the center line of the inner surface of the upright tire by a tow rope adhesive part 15 using a similar rubber material. There are multiple intersecting organic fiber bands 2 in the rope attachment part.
1 and the ends of the dragline 14 are connected. Pull line 1
4 shall be an organic fiber cord or an inorganic glued wire, and shall be non-rigid.

The adhesive surface of the rope adhesive part 15 and the tire is an adhesive surface with a certain range of width, and is adhered to the adhesive area of the tire. Fifth
As shown in the figure, the other end of the pull cable 14 is attached to an adjustable ball nut 17.
The length of the pull rope 14 can be adjusted during assembly. A tire is a pressure vessel. Due to its structure, the pull rope 14 will not be pulled too much,
The stopper receiving ring 11 functions on either side. The bearings 6a to 6b are in contact with a bearing fixing plate 8, and the magnetic circuit 1 is in contact with a magnetic circuit fixing plate 9 that is in close contact with the rim 25 of the wheel, and all three layers are fixed by four anti-slip pieces 10 welded to the rim of the wheel. be done. The coil frame 4 has legs, and the coil 28
~2b, there is an air gap corresponding to the thickness of the leg between the magnetic circuit 1 and the magnetic circuit 1. The protective plates 29a to 29b shown in the cross-sectional views of FIG. 3 A-A and FIG. When installing, install to protect the equipment from damage.

These protective plates 29a-29b are not shown in FIGS. 1 and 2. The above devices are arranged at equal intervals on the inner surface of the rim of the wheel, on the magnetic circuit.

The coils 2a and 2b are connected in series, exit outside the tire using a take-out terminal 32, pass through a wire protection cover 38 on the outside of the wheel shown in FIG. 9, and are introduced into a slip ring 35. The extraction terminal 32 (Fig. 14) is airtightly tightened with an insulator 23, a rubber washer 30, and a nut.
The slip ring 35 that takes out the conductor outside the rim has a first
As shown in Figure 0, there is a slip ring cover 37 with a bearing 39, which holds the brush 36 and brush case 40. The electric wire extending spirally from the brush case passes through the inner tube 41 and enters the vehicle body through the vehicle wheel cover 46.

The outer cylinder 42 is located outside the inner cylinder, and the inner cylinder 41 is movable up and down. The outer cylinder stop 47 at the upper end of the outer cylinder 42 is fixed to the vehicle wheel cover 46, and corresponds to the up and down of the tire, the tilt of the tire due to steering, and changes in direction, and prevents the slip ring and the slip ring cover from rotating together. do.

Operation FIG. 11 is an explanatory diagram of an example in which four power generating devices are arranged.The power generating devices 50a to 50d are connected to the rim 2 of the tire wheel.
5, which are fixed at equal intervals on the magnetic circuit 1, and the traction lines 14 are connected to the traction line adhesive bonded to the tire. Due to the ground pressure caused by tire transfer, the ground contact area
It is recessed in the wheel direction including the ground impact area 24. The pull line 14 is pushed up and slackened. As the rotation of the tire progresses, the deformed part recovers to its original shape, and the tow rope 14 loses its slack and becomes pulled. Due to the slack and tension of the pull line 14, the magnetic poles 3a, 3b of the generator are connected to the coils 2a, 2b.
go in and out.

The same applies when the power generating units W50b, 50c, and 50d approach and pass over the grounding part. As mentioned above (FIG. 9), the electromotive force is applied from the extraction terminal 32 to the outside of the wheel 28,
The wire passes through the wire protection cover 38 and is taken out from the brush 36. Chewless tires will be used. The pull rope 14 is not rigid, has a slip angle, and adapts to the movement of the force application point of the ground contact area due to the "torsional deformation" of the tire as described in FIG. Further, the legs of the coil frame 4 create a gap between the coil frame 4 and the magnetic circuit 1 by the thickness of the legs, thereby weakening air resistance when the magnetic pole enters and exits the coil.

Among the four power generating devices arranged on the magnetic circuit 1, an electromotive force is obtained only from the power generating device corresponding to the part where the tire is deformed by the ground pressure.
It is introduced into the vehicle body through the brush 36, inner tube 41, outer tube 42, and vehicle wheel cover 46.

If we pay attention to that point in time, the other three power generators are in the state of X, with the ropes 14 still being pulled, and are basically in a stopped state. Even if the magnetic poles of the device, which are basically stationary, move slightly due to tire vibration, no current will flow through the slip ring to the coils that are not in contact with the brush.

The change in the direction of travel of the tire is small while driving, and the angle increases when approaching a vehicle, but the movement is slow. Figure 13 is an external view of the slip ring, inner cylinder, and outer cylinder attached to the vehicle wheel cover. , weather resistant. The electric power generated while driving is used to charge the onboard storage battery through a transformer, rectifier, cut-in device, etc. (not shown) installed inside the vehicle.

The stopper receiving ring 11 (FIG. 15) has a bottom plate with a small hole in the center, is stopped by a stopper receiving stop 19 to an extent that it does not come off, and is not fixed to the bearing fixing plate 8. Since the stopper receiving ring 19 can be rotated around the stopper receiving ring 19 as an axis by external force, the stopper 128° 12b is prevented from abutting against a specific location of the stopper receiving ring 11, thereby preventing excessive wear at the same location.

Example Fig. 11 shows an example in which four power generators are arranged, but six,
It is possible to increase the number to 8 pieces. Permanent magnet is ferrite molded,
Alternatively, if a part is made of ferrite molding, the part or the whole part is coated with a thin film, if necessary, in order to make it resistant to impact.

There is enough air space within the effect rim to secure the number of turns of the coil, and existing strong permanent magnets are used. The speed at which the magnetic poles are inserted and removed is proportional to the rolling speed of the tire.

Using the example of a widely used tire with an outer diameter of 600 mm and a load radius of 287 mm, the rotational speed of a tire is 1,800 mm per rotation, and 0 at a speed of 60 bm/h.
．． It rotates once in 1 second.

Since the tire is filled with compressed air, the adhesive force of the drag rope adhesive part 15 is strengthened by increasing the surface to be adhered to the inner liner on the inner surface of the tire to some extent, and the tensile force of the drag rope 14 is also increased.

Tires are air springs. The electromotive force is generated by the spring 5 and the bearing 6a.
This is based on the operation mainly using the support column 13 containing a permanent magnet with 6b as the fulcrum, the coil, and the pull line 14 using the air spring of the tire.

When a power generation device is placed on a tire, it is impossible to prevent an increase in weight. The running resistance of a car is ■Rolling resistance of tires ■Rotational resistance of drive system ■Air resistance
■ Gradient resistance ■ Acceleration resistance Of the above, acceleration resistance (■) includes inertial resistance to rotate the rotating body. Light weight is advantageous in this case.

Efforts must be made to reduce the weight of power generation equipment, including the use of new materials.

90% of the rolling resistance of the tire (2) is due to tire deformation. Of course, you should pay attention to the load, but unless there are special circumstances, by making an effort to properly adjust the air pressure so that an appropriate tire contact area is obtained, rolling resistance will be reduced and the power generator will run smoothly. Operate.

Radial tires have less tread deformation than bias tires, and the degree of deformation may vary depending on the type of tire, so by moving the adjustment plate 16 shown in FIG. 1 and using the adjustment ball nut 17, Adjust the length of the pull rope 14. Furthermore, this allows the distance of the magnetic pole to enter and exit the coil relative to the pulling distance of the pull line 14 to be changed. This work is performed during assembly depending on the type of tire used.

Permanent magnet 3, permanent magnet reinforcement hole) 33a, 3
3b, except for the VT magnetic circuit, try to select materials that are light and non-ferromagnetic.

Since the number of power generation devices installed can be increased to six or eight, power can be obtained with a waveform close to an AC sine wave, and the power generation method will lighten the load on the drive system as much as possible.
Even if the above losses are taken into account, there is still an effect.

[Brief explanation of drawings]

Figure 1 is a side view of the power generating device, Figure 2 is a plan view, Figure 3 is a sectional view taken along A-A, Figure 4 is a sectional view taken along B-B, and Figure 5 shows the inner liner, pull line adhesive, and pull line. FIG. 6 is a diagram showing the relationship between the rope and the permanent magnet strut, and FIG. 6 is a diagram illustrating the connection scheme between the rope adhesive part, the rope, and the adjustment ball nut. FIG. 7 is an explanatory diagram of tire deformation due to ground pressure. Figure 8 is an explanatory diagram of the tire force application point when a slip angle occurs;
Fig. 9 is a relationship diagram between the slip ring, slip ring cover, and electric wire, and Fig. 10 is an exploded view of the introducing device from the slip ring to the vehicle body. Fig. 11 is an explanatory diagram of the arrangement of the device, Fig. 12 is an enlarged view of the outer cylinder stop of the device introduced into the vehicle body, Fig. 13 is an external view with the introduction device installed, Fig. 14 is an exploded view of the extraction terminal, FIG. 15 is an exploded view of the bust collar receiver ring. 1. Magnetic circuit 2a, 2b, N-turn coil 3, 3a, 3b, permanent magnet 4. Coil frame 5, spring
6a, 6b, bearing 7, movable plate
8. Bearing fixing plate 9, magnetic circuit fixing plate 10. Anti-slip 11, stopper receiving rings 12a, 12b, stopper 13, permanent magnet support 14. Pull line 15, pull line adhesive part 16. Adjustment plate 17, adjustment bolt nut 19, stopper receiving stop 21, organic fiber band 22. Protective plate nut 23,
Insulator 24. Ground contact area 25, wheel rim 26. Tire bead portion 27, tire tread 28. Wheels 29a, 29b, protective plate 3
0. Rubber washer 31, inner liner 32. Output terminals 33a, 33b, permanent magnet reinforced ball nut 3
5. Slip ring 36. Brush 37, slip ring cover 38, wire protection cover 39. Bearing 40, brush case 41. Inner cylinder 42, outer cylinder 46. vehicle wheel cover 47,
Outer cylinder stop 48. Electric wires 50a, 50b, 50c, 50d, power generation device 51
゜Road surface

Claims (1)

[Scope of Claims] 1. In an electric vehicle, deformation of the tire caused by running can be controlled by a magnetic circuit installed at the bottom of the inner surface of the wheel rim using a pull cable attached to the inner liner on the inner surface of the tire. The bearing is held on the bearing fixed plate, and the transmission is transmitted to the permanent magnet column that has a permanent magnet inside, and the tension and slack of the pulling cable causes the spring between the permanent magnet column and the bearing fixed plate to expand and contract, and the movable plate is used as the fulcrum. A plurality of power generating devices are arranged in which the magnetic poles of the permanent magnet struts are simultaneously and mutually moved in and out of corresponding coils provided on a magnetic circuit, and an extraction terminal that airtightly communicates the electromotive force to the outside of the rim. A power generating device powered by the deformation of a pneumatic tire due to ground pressure, and has a circuit connected to a slip ring installed at the center of the outside of the wheel. 2. A slip ring is provided with a cover, and an inner cylinder has an electric wire connected to the brush of the slip ring cover inside, and an outer cylinder that cooperates with the inner cylinder to correspond to the tire traveling direction, tire inclination, and vertical movement. A device for introducing electric power from the power generating device according to claim 1 into a vehicle body while the vehicle is running, having an outer cylinder stop.