CN102176647B

CN102176647B - Piezoelectric type generator of wheel air valve

Info

Publication number: CN102176647B
Application number: CN201110062003.4A
Authority: CN
Inventors: 陈志军; 韩春霞; 张楠; 罗永前; 薛金波
Original assignee: Chongqing College of Electronic Engineering
Current assignee: Chongqing College of Electronic Engineering
Priority date: 2011-03-15
Filing date: 2011-03-15
Publication date: 2014-03-12
Anticipated expiration: 2031-03-15
Also published as: CN102176647A

Abstract

The invention provides a piezoelectric type generator of a wheel air valve, comprising an air needle and a jacket, wherein the upper part of the air needle is provided with a locating disk; the air needle is connected with an inner wall of the jacket by the locating disk; a cavity is formed between the air needle and the jacket; the locating disk is provided with a plurality of air vents; an elastic metal plate, a thin metal plate and a piezoelectric block are arranged on the locating disk in sequence from bottom to top; the elastic metal plate is fixed and in sealing connection with the inner wall of the jacket; the bottom of the elastic metal plate is connected with the locating disk by a spring; the thin metal plate and the piezoelectric block are fixed on the inner wall of the jacket and the piezoelectric block is closely adhered to the thin metal plate; two ends of the piezoelectric block are connected with loads by wires; and the elastic metal plate pushes the thin metal plate and drives the thin metal plate to push the piezoelectric block so as to generate currents for the purpose of supplying power for the loads when the elastic metal plate bounds upwards. The generator can utilize changes of air pressure in wheel tyres to generate electricity so as to produce electric energy which is supplied for diodes or storage batteries.

Description

Piezoelectric type generator of wheel air valve

Technical field

The present invention relates to a kind of small-sized electric generating apparatus, be specially a kind of piezoelectric generator being installed on wheel valve.

Background technology

In motor-driven vehicle going process, shake due to ground injustice and hub for vehicle wheel self, wheel inevitably exists vibration, and the vibration due to wheel is squeezed tire and produces certain distortion again, and then the air pressure size in tire is changed.The valve of wheel normally adopts valve inside directly to seal at present, but the valve inside of this structure is only to play single sealing function, and it can not be converted into the variation of tire internal gas pressure can be for the energy utilizing; And the top of this valve inside is long-term outside exposed, has easy impaired defect in motor-driven vehicle going process.

Summary of the invention

For above-mentioned deficiency of the prior art, main purpose of the present invention is to solve does not also have a kind of problem of utilizing specially wheel tyre internal gas pressure to change to obtain the device of energy at present, and a kind of piezoelectric type generator of wheel air valve is provided.

Technical scheme of the present invention: piezoelectric type generator of wheel air valve, comprise air tube and overcoat, it is characterized in that, on the top of air tube, be provided with positioning disk, air tube is connected with outer casing inner wall by positioning disk, between air tube and overcoat, forms cavity; On positioning disk, be provided with several air vent holes, on positioning disk, be provided with successively from lower to upper elasticity iron plate, tagger and piezoelectric blocks, described elasticity iron plate and outer casing inner wall are fixed and are tightly connected, the bottom of elasticity iron plate is also connected with positioning disk by spring, described tagger and piezoelectric blocks are all fixed on outer casing inner wall, and piezoelectric blocks is close on tagger, the two ends of piezoelectric blocks are connected with load by wire; Elasticity iron plate is pushed tagger when upwards bouncing up, and drives tagger extruding piezoelectric blocks generation current powering load.

Piezoelectric generator of the present invention inserts wheel tyre by air tube when mounted, cavity in generator is communicated with the inner chamber of tire, air pressure in tire can be directly acted on the elasticity iron plate in generator, make elasticity iron plate, under gas pressure, deformation occur, and push piezoelectric blocks, and then at piezoelectric blocks two ends generation current.

Further technical scheme, is also provided with sealing gasket in the junction of positioning disk and outer casing inner wall, by sealing gasket, can strengthen the sealing between air tube top positioning disk and overcoat.

Further technical scheme, described overcoat consists of upper cover and base, and the inwall of upper cover is threaded with positioning disk; At base inner wall, be provided with positive stop lug boss, air tube, through the hole in the middle of positive stop lug boss, is also provided with for the projection spacing to air tube at air tube two ends.The diameter of air tube two ends projection is all greater than the diameter in the hole in the middle of positive stop lug boss, and the projection at two ends can prevent that air tube from skidding off overcoat like this.In the present invention, overcoat is divided into upper and lower two-part effect and is for convenience detach and installs, particularly when making, can first in upper cover, install after elasticity iron plate, tagger and piezoelectric blocks, then assemble, can reduce manufacture difficulty like this; By being set, positive stop lug boss not only can limit the position of air tube simultaneously, can also install and carry out fault prompting when not in place (when upper cover and base do not push against at equipment, air tube bottom will clamp with positive stop lug boss under tire pressure effect, the endoporus of positive stop lug boss is shut, cause air-flow obstructed, at this moment on elasticity iron plate, owing to not being stressed, cannot push piezoelectric blocks generating, therefore the light-emitting diode as load will not work, when people observe light-emitting diode during at rotation of wheel and do not work, just can judgment device install and do not put in place or occurred fault).

With respect to prior art, the present invention has following beneficial effect:

1, can utilize the air pressure change in wheel tyre to generate electricity: generator of the present invention utilizes piezoelectric self to be under pressure and makes the characteristic that the used time can form voltage between both ends of the surface, and the pressure to valve forming while utilizing wheel tyre internal gas pressure to change promotes to be arranged at the elasticity iron plate of air tube upper end, make it under spring drives, to piezoelectric blocks, carry out extruding repeatedly, can be for the electric energy of diode or storage battery thereby produce in circuit.

2, air tube is formed to double shielding; prevent gas leakage: the elasticity iron plate in the present invention and the upper cover in outside have formed the housing of a sealing on air tube top; to air tube, can form double shielding like this, also between air tube and overcoat, be provided with sealing gasket simultaneously, reach the object that prevents gas leakage.

Accompanying drawing explanation

Fig. 1 is the structure cutaway view of piezoelectric type generator of wheel air valve of the present invention;

Fig. 2 is the structure cutaway view of positioning disk in Fig. 1;

Fig. 3 is a kind of wheel schematic diagram that generator of the present invention has been installed.

In figure, 1-air tube, 11-positioning disk, 12-air vent hole, 2-overcoat, 21-upper cover, 22-base, 23-positive stop lug boss, 3-cavity, 4-elasticity iron plate, 5-tagger, 6-piezoelectric blocks, 7-spring, 8-wire, 9-load, 10-sealing gasket, 13-valve.

Embodiment

Below in conjunction with the drawings and specific embodiments, the invention will be further described.

As depicted in figs. 1 and 2, piezoelectric type generator of wheel air valve of the present invention, comprises air tube 1 and overcoat 2, described air tube 1 is thick, middle thin " dumbbell " shape in two, described overcoat 2 is tubular structure, at the upper and lower end of overcoat 2, is equipped with opening, and air tube 1 is vertically arranged in overcoat 2.Top at air tube 1 is also provided with positioning disk 11, described positioning disk 11 matches with the shape of cross section of overcoat 2 inner chambers, air tube 1 is connected with overcoat 2 inwalls by positioning disk 11, between air tube 1 and overcoat 2, form cavity 3, the open communication of described cavity 3 and overcoat 2 bottoms, after generator of the present invention is arranged on wheel tire, cavity 3 is communicated with the inner chamber of tire; On positioning disk 11, be also provided with several air vent holes 12, in the present invention, air vent hole 12 be set to 8, and be circular and be uniformly distributed, gas pressure distribution is also more even like this; On positioning disk 11, be provided with successively from lower to upper elasticity iron plate 4, tagger 5 and piezoelectric blocks 6, described elasticity iron plate 4 is fixed and is tightly connected with overcoat 2 inwalls, the bottom of elasticity iron plate 4 is also connected with positioning disk 11 by spring 7, and elasticity iron plate 4 is communicated with the cavity 3 of bottom by air vent hole 12 with the annular seal space between positioning disk 11; Described tagger 5 and piezoelectric blocks 6 are all fixed on overcoat 2 inwalls, and piezoelectric blocks 6 is close on tagger 5, and the two ends of piezoelectric blocks 6 are connected with load 9 by wire 8.In the present invention, piezoelectric blocks 6 is the blockss that adopt existing piezoelectric to make, utilize the characteristic of piezoelectric self, when extruding is during piezoelectric blocks 6, at two end surfaces of piezoelectric blocks 6, will produce electric charge, when piezoelectric blocks and load are connected to form behind loop, just can in loop, form electric current; Load 9 is arranged on the aperture position at overcoat 2 tops, and it can be light-emitting diode, can be also storage battery, and elasticity iron plate 4 is pushed tagger 5 when upwards bouncing up, and drives tagger 5 extruding piezoelectric blocks 6 generation currents to load 9 power supplies.

Referring to Fig. 1, in positioning disk 11 and the junction of overcoat 2 inwalls, be also provided with sealing gasket 10, described sealing gasket 10 can be for having certain flexible rubber blanket, also can be combined labyrinth and carbon gland pad, can also be metallic gasket, by sealing gasket 10, can strengthen the sealing between air tube top positioning disk 11 and overcoat 2.

Referring to Fig. 1, described overcoat 2 is to consist of upper cover 21 and base 22, the inwall of upper cover 21 with positioning disk 11 for being fixedly connected with or being threaded, middle part at base 22 inwalls is provided with positive stop lug boss 23, air tube 1, through the hole in the middle of positive stop lug boss 23, is also provided with for the projection spacing to air tube 1 at air tube 1 two ends.

Operation principle: referring to Fig. 1 and Fig. 3, during installation, first the overcoat of generator 2 is connected on the valve 13 of tire, and the bottom of air tube 1 is inserted in valve 13, the inner chamber of tire and the cavity 3 of overcoat 2 are communicated with, and the air pressure in tire can act directly on elasticity iron plate 4 after cavity 3, air vent hole 12 like this, because the air pressure in tire is greater than extraneous air pressure, therefore elasticity iron plate 4 can be formed and be upwarded pressure, and then make elasticity iron plate 4 upwards bounce up distortion; Elasticity iron plate 4 will be pushed the tagger 5 of upper end in bouncing up process, and tagger 5 pushes again the piezoelectric blocks 6 on top, makes piezoelectric blocks 6 two ends produce electric charges and form electric current in the loop being connected to form with load 9, thereby reaching the object to load 9 power supplies.

Again due to automobile in the process of moving tire there is the situation of vibration, so tire internal gas pressure is also suddenly big or suddenly small variation, also there is large and small variation in the air pressure acting on like this on elasticity iron plate 4, air pressure is also suddenly big or suddenly small to the pressure of elasticity iron plate 4; When the pressure on elasticity iron plate 4 reduces, it will shrink under 7 effects of the spring in bottom, when the pressure on elasticity iron plate 4 increases, it upwards bounces up again, elasticity iron plate 4 just forms the upper and lower state of vibration repeatedly in vehicle traveling process like this, and promote tagger 5 and repeatedly push piezoelectric blocks 6, thereby provide stable, continuable electric current for load.

Claims

1. piezoelectric type generator of wheel air valve, comprise air tube (1) and overcoat (2), it is characterized in that, on the top of air tube (1), be provided with positioning disk (11), air tube (1) is connected with overcoat (2) inwall by positioning disk (11), between air tube (1) and overcoat (2), forms cavity (3), on positioning disk (11), be provided with several air vent holes (12), on positioning disk (11), be provided with successively from lower to upper elasticity iron plate (4), tagger (5) and piezoelectric blocks (6), described elasticity iron plate (4) is fixed and is tightly connected with overcoat (2) inwall, the bottom of elasticity iron plate (4) is also connected with positioning disk (11) by spring (7), described tagger (5) and piezoelectric blocks (6) are all fixed on overcoat (2) inwall, and piezoelectric blocks (6) is close on tagger (5), the two ends of piezoelectric blocks (6) are connected with load (9) by wire (8), elasticity iron plate (4) is pushed tagger (5) when upwards bouncing up, and drives tagger (5) extruding piezoelectric blocks (6) generation current to power to load (9), described load (9) is light-emitting diode, is arranged on the aperture position at overcoat (2) top.

2. piezoelectric type generator of wheel air valve according to claim 1, is characterized in that, in positioning disk (11) and the junction of overcoat (2) inwall, is also provided with sealing gasket (10).

3. piezoelectric type generator of wheel air valve according to claim 1, it is characterized in that, described overcoat (2) consists of upper cover (21) and base (22), and the inwall of upper cover (21) is threaded with positioning disk (11), at base (22) inwall, is provided with positive stop lug boss (23); Air tube (1) is through the hole in the middle of positive stop lug boss (23), and air tube (1) two ends are also provided with for to the spacing projection of air tube (1).