KR101734571B1 - Self-generator using rubber spring of vehicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-generating device using a rubber spring for a vehicle, and more particularly, to a self-generating device using a rubber spring for a vehicle, To a self-generating device using a rubber spring for a vehicle that can convert pressure into electric energy.
That is, the present invention relates to a power steering apparatus for a vehicle, which comprises a plurality of piezoelectric elements and spacers arranged at regular intervals in a rubber spring for supporting a leaf spring of a commercial vehicle, And it is an object of the present invention to provide a self-generating device using a rubber spring for a vehicle, which can improve durability as a piezoelectric element or the like is wrapped around by a rubber spring.

Description

Technical Field [0001] The present invention relates to a self-generating device using a rubber spring for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-generating device using a rubber spring for a vehicle, and more particularly, to a self-generating device using a rubber spring for a vehicle, To a self-generating device using a rubber spring for a vehicle that can convert pressure into electric energy.

In recent years, eco-friendly vehicles such as electric vehicles and hybrid vehicles have been released, and hybrid systems including engines and motors are also installed in commercial vehicles such as passenger vehicles and buses.

These electric vehicles and hybrid vehicles are equipped with a high voltage battery and are used as a main power source and are used as an auxiliary power source by charging generated power obtained through regenerative braking.

Therefore, there is a need for a method that electric vehicles and hybrid vehicles can generate electric power of their own by any method, and can be charged to a battery or used as a power source for various kinds of electrical components.

Of course, in general gasoline and diesel vehicles, in order to prevent overloading of the electrical products, it is necessary to generate electricity that can be used as auxiliary power in addition to the main battery power.

As one example of the related art, in the open patent application (2010-0027479, 2010, 03, 11), electric power is generated by using the pressure applied to the wheels of the vehicle while driving, thereby generating power by using electric power such as an electric car or a hybrid electric vehicle However, there is a disadvantage in that a small amount of the piezoelectric element that generates a voltage during one rotation of the tire operates in a small proportion, which is very inefficient. In addition, in the case of a commercial vehicle, There is a possibility that heat may be generated in the drum brake portion, which may cause problems in durability.

As another example of the related art, in the patent publication (2007-0014328, 2007, 02, 01), a piezoelectric element assembly is mounted inside an airbag of an air suspension of a vehicle, and the bending and pitching energy The present invention relates to a power generating device using vibration of a vehicle, and more particularly, it relates to a power generating device using a vibration of a vehicle, which is capable of generating a small voltage by reducing a load through an air bag, There is a disadvantage in that the power generation efficiency is largely deteriorated because the power generation operation is performed in a small small cross sectional area.

As another example of the prior art, in the case of the prior art (2005-0041022, 2005, 05, 04), engine vibration applied to a mount supporting a vibration source such as an engine is converted into electric energy, A vehicle vibration canceling apparatus using energy conversion that can be used for power supply of an engine and a vehicle is disclosed, and a large amount of voltage can be obtained through very frequent vibration due to vibration caused by driving of an engine and a vehicle. However, There is a problem in durability, and there is a disadvantage that a good power generation efficiency can not be obtained by utilizing a small area of the engine mount.

Therefore, there is a demand for a self-generating device with higher power generation efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to provide a vibration damping device capable of suppressing vibrations and pressure And the durability can be improved as the piezoelectric element or the like is enclosed by the rubber spring. The object of the present invention is to provide a self-generating device using a rubber spring for a vehicle.

According to an aspect of the present invention, there is provided a self-propelled power generating device using a rubber spring for a vehicle, which comprises a rubber spring mounted on a rear suspension of a commercial vehicle, and integrally molding a piezoelectric element assembly, Device.

The piezoelectric element assembly according to an embodiment of the present invention includes: a spacer; First and second plates attached to the upper and lower surfaces of the spacer; First and second piezoelectric elements stacked on an outer surface of the first and second plates; Third and fourth plates laminated on outer surfaces of the first and second piezoelectric elements; A coil conductively connecting each of the piezoelectric elements; .

Preferably, a guide hole is formed through the spacer and the first to fourth plates so that a coil that conductively connects the piezoelectric elements passes through the spacer.

The piezoelectric element assembly according to another embodiment of the present invention includes: a pair of spacers or single plate spacers; A piezoelectric element disposed between the pair of spacers or disposed on one surface of the single plate spacer; A coil for electrically connecting each of the piezoelectric elements; And a control unit.

Preferably, the spacer is formed with a guide hole through which a coil for electrically connecting each piezoelectric element passes.

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

According to the present invention, a large number of piezoelectric elements and spacers are provided in a rubber spring for supporting a leaf spring of a commercial vehicle, so that vibrations and pressures generated by the load and road conditions of the vehicle are conventionally applied to a tire, an engine mount, It is possible to greatly increase the power generation efficiency to be converted into electrical energy by allowing the piezoelectric element to receive more power than the piezoelectric element that is installed.

Further, since the piezoelectric element assemblies adopted in the present invention are integrally molded and wrapped in the rubber spring, durability can be improved.

Such self-developed power can be used as a power source for electric vehicles or hybrid vehicles, or as an alternative power source when an overload of the vehicle power system occurs due to the operation of an air conditioner or a heater of a general gasoline or diesel vehicle.

1 is a schematic sectional view showing an embodiment of a self-generating device using a rubber spring for a vehicle according to the present invention,
FIG. 2 is a schematic cross-sectional view showing another embodiment of the self-generating device using the rubber spring for a vehicle according to the present invention,
FIGS. 3 and 4 are schematic views for explaining positions where the rubber springs are installed in the rear suspension of the vehicle,
5 is a view for explaining the compressive strain during running of a rubber spring installed in a rear suspension of a vehicle,
6 is a graph illustrating the principle of electricity generation of a piezoelectric element;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, in order to facilitate understanding of the present invention, the configuration of a rear suspension unit of a commercial vehicle such as a heavy truck will be described.

3 and 4, the three-axis rear axle 1 and the four-axis rear axle 2 are provided. The three-axis rear axle 1 and the four- The backward movement of the vehicle body is restrained by the earth rod 3.

A trunnion shaft (not shown) is installed in the trunnion base 4, to which the one end of the radial rod 3 is coupled, in the left and right direction of the vehicle body. The saddle 6 and the leaf spring 7 are located at the center portion of the leaf spring 7. The saddle 6 and the leaf spring 7 are disposed in the center of the saddle 6, Are coupled to each other by a pair of male bolts (8).

At this time, both ends of the leaf spring 7 arranged in the front-rear direction of the vehicle body are engaged with the three-axis rear axle 1 and the four-axis rear axle 2 via the rubber springs 9, respectively.

The main feature of the present invention resides in that a self-generating device using a piezoelectric element is integrally molded and incorporated in the rubber spring 9 in the configuration of the rear suspension as described above.

That is, the self-power generation apparatus using the piezoelectric element of the present invention is characterized by being integrated in a rubber spring of a rear suspension unit capable of securing a wide cross-sectional area and increasing power generation efficiency through frequent displacement.

The reason why the self-power generation apparatus using the piezoelectric element of the present invention can achieve high power generation efficiency is as shown in the waveform diagram showing the actual displacement amount (actual vehicle) due to the vibration at points 1 to 6 in Fig. At the height of 150mm, the maximum displacement is 20mm. Due to the characteristics of the commercial vehicle, a maximum load of 10ton acts on one shaft. However, due to the load of at least 4ton due to mounting of two rubber springs on both sides, high voltage can be generated, have.

To this end, the present invention is characterized in that a piezoelectric element assembly (10) formed at equal intervals in the vertical direction is integrally vulcanized in a rubber spring (9) mounted on a rear wheel suspension of a commercial vehicle.

The piezoelectric element assembly 10 according to an embodiment of the present invention is manufactured with a more stable structure by bonding a spacer and a plate supporting the piezoelectric element although the number of the piezoelectric elements is small.

3, the first and second plates 11 and 12 are in close contact with the upper and lower surfaces of the spacer 13, and the first and second plates 11 and 12 are in close contact with each other. The first and second piezoelectric elements 14 and 15 are laminated on the outer surfaces of the first and second plates 11 and 12 and the third and fourth piezoelectric elements 14 and 15 are formed on the outer surfaces of the first and second piezoelectric elements 14 and 15. [ 4 plates 16 and 17 are stacked and made into a structure having durability and stability with respect to the first and second piezoelectric elements 14 and 15, and each plate 11, 12 and 16 , 17) are applied as a complementary structure for maintaining the shape of the rubber spring.

At this time, each of the piezoelectric elements 14 and 15 of each piezoelectric element assembly 10 is conductively connected by a coil 18.

More specifically, the coils 18 pass through the spacer 13 and the guide holes 19 formed through the first to fourth plates 11, 12, 16, 17, so that the piezoelectric elements 14, 15) are conductively connected by a coil (18).

The piezoelectric element assembly 10 according to another embodiment of the present invention is manufactured in such a structure that the number of piezoelectric elements is increased and a piezoelectric element having a large size is applied to further improve the power generation efficiency.

4, the piezoelectric element assembly 10 according to another embodiment of the present invention includes a pair of spacers 13 or a single plate spacer 13, and also includes a pair of spacers 13 13 or on one side of the single-plate spacers 13, and each piezoelectric element 20 is conductively connected by a coil 18. The piezoelectric elements 20 are arranged in a stacked manner.

Likewise, each of the piezoelectric elements 20 is conductively connected by the coil 18 while passing the coil 18 through the guide hole 19 formed in the spacer 13.

The piezoelectric element assembly 10 according to each of the embodiments of the present invention described above is manufactured by vulcanization molding such that it is embedded in the rubber spring 9.

That is, in the method of manufacturing the self-powered device using the rubber spring of the present invention, rubber is injected into the rubber spring 9 while the spacer is attached to the rubber spring 9, and the rubber spring 9 is vulcanized. A piezoelectric element, a plate, and the like are disposed together and are vulcanized and molded together, so that they can be manufactured as an autogenerator using the rubber spring of the present invention. Thus, the piezoelectric element is surrounded by the rubber material of the rubber spring 9, Foreign matter inflow and other deformation possibilities can be excluded.

On the other hand, since the material of more than half of the constituent parts of the rubber spring 9 is made of rubber, it is possible to generate not only the up-and-down movement but also the voltage generation due to the movement of the front and rear left and right movement. A coil 18 of a suitable winding type is used.

In addition, a spring-shaped coil 18 is used so that each piezoelectric element can be electrically connected in series. The number of turns of the coil 18 is adjustable according to the condition of the coil, It is possible to prevent the occurrence of disconnection even if the shear deformation due to the up-and-down and left-right movement of the rubber spring 9 occurs.

FIG. 5 is a graph showing strain due to 0.8 mm compression, 0.8 mm compression and 1.1 degree rotation of the rubber spring at the time of traveling, and there is a portion where the deformation rate due to the front and rear left and right portions occurs in addition to the upper and lower portions inside and outside Therefore, it is preferable to select the material and the position of the piezoelectric element by a sufficient test, although there is a possibility that the piezoelectric element can be installed in such a place to generate more voltage, and of course, the possibility of breakage.

Hereinafter, a power generating operation of the self-power generator using the rubber spring for a vehicle according to the present invention will be briefly described.

As shown in the attached graph of the piezoelectric device characteristic shown in FIG. 6, an electromotive force (voltage) is generated when a displacement or a pressure difference is generated by acceleration and force, and a charge is generated when mechanically stressed.

Therefore, when the vibration and pressure generated by the load of the vehicle and the road condition are applied to the rubber spring 9 at the time of traveling of the vehicle, the displacement and the displacement due to the driving acceleration and the force, Mechanical stress acts on the piezoelectric element at the same time as the pressure difference acts, so that the piezoelectric element is generated.

The voltage generated in the piezoelectric elements can be boosted through a rectifier connected to the coil 18 and then charged in the battery. As a result, the self-generated electric power can be used as a power source for an electric vehicle or a hybrid electric vehicle Or as an alternative power source when an overload of the vehicle power system occurs due to the operation of an air conditioner or a heater of a conventional gasoline and diesel vehicle.

9: Rubber spring
10: Piezoelectric device assembly
11: first plate
12: second plate
13: Spacer
14: first piezoelectric element
15: second piezoelectric element
16: third plate
17: fourth plate
18: Coil
19: Information Hall
20: piezoelectric element

Claims (5)

delete A piezoelectric device assembly (10) is integrally formed in a rubber spring (9) mounted on a rear wheel suspension of a commercial vehicle, the piezoelectric device assembly (10)
The piezoelectric element assembly 10 includes:
A spacer 13;
First and second plates (11, 12) adhered to the upper and lower surfaces of the spacer (13);
First and second piezoelectric elements (14, 15) laminated on outer surfaces of the first and second plates (11, 12);
Third and fourth plates (16, 17) stacked on the outer surfaces of the first and second piezoelectric elements (14, 15);
A coil (18) for conductively connecting each of the piezoelectric elements (14, 15);
Wherein the rubber spring is a spring.
The method of claim 2,
A guide hole 19 is formed in the spacer 13 and the first to fourth plates 11, 12, 16 and 17 so that the coil 18 for electrically connecting the piezoelectric elements 14 and 15 can pass therethrough. Wherein the rubber spring is formed of a rubber material.
A piezoelectric device assembly (10) is integrally formed in a rubber spring (9) mounted on a rear wheel suspension of a commercial vehicle, the piezoelectric device assembly (10)
The piezoelectric element assembly 10 includes:
A pair of spacers 13 or single plate spacers 13;
Piezoelectric elements 20 disposed between the pair of spacers 13 or disposed on one surface of the single plate spacer 13;
A coil (18) for conductively connecting the piezoelectric elements (20);
Wherein the rubber spring comprises a rubber spring.
The method of claim 4,
Wherein a guide hole (19) is formed in the spacer (13) so that a coil (18) for electrically connecting the piezoelectric elements (20) can pass therethrough.

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