CN2862485Y - Electricity generating system based on deformation of vehicle tyre - Google Patents

The utility model discloses a cab tire deformation generation device installed between inner surfaces of wheel rim and tire; it includes a base, an outer cover, an inner tube, a magnetic body, an elastic body and a coil; the base is fixed onto the wheel rim; the outer cover sheathes the mouth of the base, with its top supporting the inner surface of the tire; the inner tube is mounted inside the base; the magnetic body is inlaid in the inner tube; the elastic body sheathes the inner tube; the coil winds the lower part of the inner tube and is adjacent to the base of magnet. The device can convert the deformation of tire under the weight of the car during steering to electric energy. The coil can generate steady electrical current as long as the car is in the process of steering.

Generating apparatus caused by automobile tyre deformation

Technical field

The utility model relates to a kind of device that utilizes the miniature deformation generating, relates in particular to a kind of generating apparatus caused by automobile tyre deformation.

Background technology

The automotive tire pressure surveillance is called for short TPMS, i.e. " Tire Pressure MonitoringSystem ", be mainly used in when running car, in time tire pressure is monitored automatically, cause low tire pressure and the high tire pressure runflat of high temperature to carry out early warning to having a flat tire, guarantee traffic safety.

Usually, the automotive tire pressure surveillance is made up of emission detection module (one on each tire) and reception display module ().Dissimilar system for monitoring pressure in tyre is specifically formed difference.

But, the TPMS emission detection module that mostly adopts the battery supply feed mode to make the tire pressure monitoring and sensing device is installed is able to operate as normal in the market, and this mode makes the TPMS lifetime of system be subjected to very big restriction, and make its monitoring take periodic battery saving mode and can not air pressure be monitored in real time, and greatly influenced the weight and volume of TPMS tire inner module air pressure.

In order to address the above problem, the someone has proposed the TPMS scheme of the full feed of piezoelectric ceramics.The operation principle that piezoelectric ceramic produces electric energy is positive reciprocal piezoelectric effect, piezoelectric ceramic can produce a considerable number of electric charge by piezoelectric effect under stress, on operation material, set up very high electromotive force, can export no small electrostatic energy, in fact constituted a piezoelectric power supplies.

(active TPMS is a kind of among the direct-type TPMS to piezoelectric ceramic at existing active TPMS, its utilizes what be installed in that each takes turns tyre cavity is the air pressure that the pressure sensor of power supply is directly measured tire with the lithium ion battery) improvement on the basis, solved the problem of battery, and the electricity generation module application surface is very wide.But piezoelectric ceramic can deformation number of times limited, generally be hundreds of thousands at present.Suppose that car day travels 100 kilometers, radius of wheel is 0.3 meter, and girth is 1.88 meters, and then every day, tyre rotation 100*1000/1.88=53191 enclosed, piezoelectric ceramic deformation just 53191 times.By the technical merit of present piezoelectric ceramic, piezoelectric power supplies can use about 10 days, or car travels 1000 kilometers.With regard to present technology, also has distance from practicality.

The utility model of Chinese patent application numbers 200410067821.3 discloses a kind of miniature vibration electric generator, its structure as shown in Figure 1, it mainly comprises housing 1, in housing, be provided with magnet steel 3, be provided with two groups of coils 2 that are mated in magnet steel 3 left and right sides, magnet steel about in the of 3 both ends of the surface be connected with the inwall up and down of housing 1 by two springs 4 respectively.When automobile pitched, this device can be converted to electric energy with the mechanical energy of vibration, was the charging of the compact electric apparatus in the automobile.

Though the miniature vibration electric generator of this utility model can be converted to electric energy with the mechanical energy of automobile vibration, but because the relation of road conditions, automobile in the process of moving, the frequency of vibration and the amplitude of vibration all are unpredictable, therefore the power supply that is produced by vibration will be interrupted and not have the cycle, the reliable power supply that can't provide for the TPMS of the real-time monitoring of needs.

Summary of the invention

The utility model is for problems such as life-span of solving existing above-mentioned TPMS, monitored density, weight and volumes, and proposes that a kind of long service life, volume are little, in light weight, the generating apparatus caused by automobile tyre deformation of power generation stabilization.

The technical scheme that the utility model is taked is: generating apparatus caused by automobile tyre deformation is installed between tire inner surface and the wheel rim; Be characterized in, comprise: magnet, coil and with the resiliency supported face; The top of described magnet is fixed on tire inner surface; Described resiliency supported face is a sphere, covers the magnet top, and its periphery is fixedlyed connected with tire inner surface, the inner cavity that forms; Described coil is wrapped on the skeleton, and described skeletal fixation is at the inner face of resiliency supported face, and is relative with magnet.

Above-mentioned generating apparatus caused by automobile tyre deformation, wherein, the top of described magnet adopts adhesive to be fixed on tire inner surface.

Above-mentioned generating apparatus caused by automobile tyre deformation, wherein, described resiliency supported face is a middle sphere to outer process, and it covers on the magnet, and periphery is fixedlyed connected with tire inner surface; Described coil is wrapped on the skeleton, and described skeletal fixation is on the edge of the outside protruding part, centre of resiliency supported face, and is relative with magnet.

Above-mentioned generating apparatus caused by automobile tyre deformation wherein, connects in the middle of the described skeleton, and its internal diameter is greater than the external diameter of magnet.

Above-mentioned generating apparatus caused by automobile tyre deformation, wherein, the bottom end of described skeleton adopts adhesive to be fixed on the inner face of resiliency supported face.

Above-mentioned generating apparatus caused by automobile tyre deformation, wherein, described resiliency supported face is provided with at least one air vent hole.

Behind the automobile starting, tyre in operation when the tire of magnet installation place is subjected to automotive dead weight and deformation caves inward, drives magnet and enters coil, and coil cutting magnetic line produces a pulse voltage; Tire when the magnet installation place no longer is subjected to automotive dead weight, then because the effect of air pressure inside recovers shape, drive magnet and withdraw from coil, coil cutting magnetic line produce one with the reverse pulse voltage of pulse voltage last time.Automobile is in the process process of running at high speed, and tire whenever turns around, and magnet will pass and withdraw from coil once, therefore needs only automobile in the process of moving, and coil just can produce lasting electric current.

Owing to the utility model has adopted above technical scheme, start just energy uninterruptable power generation of back at car, its self-powered TPMS technology (no battery supply feed technology) can make TPMS system works life-span lower limit more than 20 years, reduces the cost of product greatly.

Description of drawings

Specific performance feature of the present utility model is further specified by following embodiment and accompanying drawing thereof.

Fig. 1 is Chinese patent application number 200410067821.3 disclosed miniature vibration electric generator structural representations.

Fig. 2 is that the utility model generating apparatus caused by automobile tyre deformation is installed in overall structure schematic diagram on the tire.

Fig. 3 is the utility model structural representation of the present utility model (under the general state) when tire tread does not contact with ground in use, and wherein: a is that the present invention is installed in the user mode figure in the tire, and b is the enlarged diagram of empty frame part among a.

Fig. 4 is the utility model structural representation of the present utility model when tire contacts with ground in use, and wherein: a is that the present invention is installed in the user mode figure in the tire, and b is the enlarged diagram of empty frame part among a.

Embodiment

Electricity generating principle of the present utility model is as follows: