CN200982978Y - Rotation rate sensor - Google Patents

Abstract

The utility model relates to a speed sensor for detecting the engine speed of motorcycle, dune buggy, kart and the electric vehicle or the vehicle speed. The speed sensor includes a shell group legislature and a magnet which is fixed in the shell. The shell group legislature comprises a shell and a bush which is inserted into the shell. The magnet is attached directly with Hall Integrate Circuit and sealed in the shell group legislature by seal ring. Wherein utilizing the concave-convex segment difference of metal piece which is rotation or movement on the motor vehicles, such as the segment difference of the top of the driven gear and the bottom of the driven gear at the end of the engine, the cutting change occurs with the magnetic line of the magnet which is fixed in the shell of the speed sensor. When the metal piece having the concave-convex segment difference, the magnet magnetic line generates the cutting change because of the difference of the high point and the low point of the concave-convex segment difference, then the Hall Integrate Circuit which is arranged in the speed sensor generates a signal through the microcircuit also because of the change of the magnetic lines. The signal can be transmitted by conductor to the vehicle dashboard to indicate or display the engine speed of the motor vehicle or the vehicle speed.

Description

The rotating speed inductor

One, technical field

The utility model relates to engine speed or the Vehicle Speed that is used to detect various motor vehicles such as motorcycle, beach buggy, kart, electric motor vehicle.

Two, background technology

At present, existing be used to detect the engine speed of various motor vehicles such as motorcycle, beach buggy, kart, electric motor vehicle or the ordinary rotational speed inductor of Vehicle Speed is generally mechanical structure, adopt the transmission of wrom tooth wheel because of it is inner, sneak into dust easily and exist, cause damaging parts, so shorten the product drawback in serviceable life.

Three, utility model content

The purpose of this utility model is that a kind of improved rotating speed inductor will be provided, and adopts the transmission of wrom tooth wheel because of it is inner to overcome existing ordinary rotational speed inductor, sneaks into dust easily and exist, and causes damaging parts, shortens the product drawback in serviceable life.

It is upright that the purpose of this utility model is achieved in that the utility model includes the shell group that is made of shell and lining, described lining imbeds in the shell, it also comprises fixing magnetite in the enclosure, and described magnetite and Hall IC directly attach, and is sealed in the shell group by O-ring seal and stands.It is the electronic type structure, its utilize in the motor vehicle rotate or the concavoconvex segment difference of the metalwork of motion for example the section at the bottom of engine final stage follower gear tooth top and the tooth is poor, the cutting variation takes place with the magnetite magnetic line of force that is fixed in this rotating speed inductor shell, when there is the concavoconvex segment difference in metalwork, the difference of Yin Qigao point and low spot and make the magnetite magnetic line of force that cutting take place to change, at this moment, the Hall IC that is installed on this rotating speed inductor inside also changes because of the magnetic line of force, thereby make it see through microcircuit and produce signal, the panel board that this signal can utilize lead to transfer to motor vehicle is indicated or the engine speed or the Vehicle Speed of display machines motor-car.

The utility model compact conformation is reasonable, and is easy to use, can prolong the serviceable life of product greatly, and be easily mounted in the motor vehicle detected.

Four, description of drawings

Fig. 1, be according to the product exploded view that the utility model proposes;

Fig. 2, be according to the scheme of installation that the utility model proposes;

Fig. 3, be according to one of the schematic diagram that the utility model proposes;

Fig. 4, be according to two of the schematic diagram that the utility model proposes;

Fig. 5, be that the utility model sees through microcircuit and handles the square waveform figure that the back produces.

Five, embodiment

Below in conjunction with drawings and Examples structure of the present utility model is further described:

In the drawings, the utility model adopts the electronic type structure, and it is by shell group upright (A), Hall IC (B), circuit board (C), magnetite (D), fixedly rubber (E), electric wire group upright (F), O-ring seal (G) and epoxy resin (H) formation.Described shell group upright (A) includes shell (A1) and lining (A2), wherein, shell (A1) uses nylon+glass, ABS, PBT, these resin materials of POM to make, lining (A2) uses non-magnet_conductible material to make, its annexation is: lining (A2) imbeds shell (A1) lining, its effect is: be used to protect electronic component and accommodate and fix other part, comprise Hall IC (B), circuit board (C), magnetite (D), fixedly rubber (E), electric wire group upright (F), O-ring seal (G) and epoxy resin (H); Described Hall IC (B) uses the application-specific integrated circuit chip material to make, and the magnetic line of force (K) of the magnetite (D) in being fixed on shell (A1) is when changing, and it can produce the state of conducting or not conducting; Described circuit board (C) uses the chock material to make, and its effect is: be used for fixing Hall IC (B) and electronic component and connect lead; Described magnetite (D) uses NdFeB material to make, be fixed in the shell (A1) and directly attach with Hall IC (B), its effect is: utilize in the motor vehicle rotate or the concavoconvex segment difference of the metalwork of motion for example the section at the bottom of engine final stage follower gear (I) tooth top and the tooth is poor, the cutting variation takes place in the magnetic line of force (K) of interior magnetite (D) with being fixed on this rotating speed inductor (AH) shell (A1), when there is the concavoconvex segment difference in metalwork, the difference of Yin Qigao point and low spot and make the magnetic line of force (K) of magnetite (D) that cutting take place to change, the Hall IC (B) of this rotating speed inductor (AH) inside produces signal also because of the magnetic line of force (K) changes thereby make it see through microcircuit; Described fixedly rubber (E) uses NBR, EPDM elastomeric material to make, and is used for fixing electric wire group upright (F) and can group upright (A), and the epoxy resin (H) that order is poured into does not leak; The lead that described electric wire group upright (F) uses each specifications and models PVC+ copper core to extrude, its effect is: be used to transmit detection signal; Described O-ring seal (G) utilizes the mode of close-fitting to be pressed in the shell group upright (A), and it adopts NBR, BII, ACM rubber to make, and is used for sealing all parts that end in oil and the fixed housing group upright (A); The effect of described epoxy resin (H) is: embedding is installed magnetite (D) and circuit board (F) endoporus in shell (A1), is used for fixing magnetite (D) and circuit board (C).

In actual applications, the utility model is installed on the engine housing (J) of various motor vehicles such as motorcycle, beach buggy, kart, electric motor vehicle, with the rotating speed of detecting engine final stage follower gear (I), as shown in Figure 2; When (L) at the bottom of the tooth of final stage follower gear (I) is close with the Hall IC (B) of this rotating speed inductor (AH), the magnetic line of force (K) of magnetite (D) is not changed, being clipped in Hall IC (B) between magnetite (D) and the final stage follower gear (I), to keep not conducting be normally open, as shown in Figure 3; When the Hall IC (B) of the tooth top (M) of final stage follower gear (I) and this rotating speed inductor (AH) near the time, the magnetic line of force (K) of magnetite (D) is changed because of cutting with final stage follower gear (I) rotation by tooth top (M), thereby make the Hall IC (B) that is clipped between magnetite (D) and the final stage follower gear (I) convert conducting to, as shown in Figure 4 by not conducting; When final stage follower gear (I) when constantly rotating, Hall IC (B) will be carried out conversion by conducting and not conducting, and constantly the conversion action can see through microcircuit and handles the back and produce square waveform, as shown in Figure 5; When the rotating speed of final stage follower gear (I) not simultaneously, square waveform cycle and frequency are just different, square waveform can see through lead and transfer in the instrument panel of motor vehicle, in instrument panel of motor vehicle then can by CPU handle and according to the deceleration of final stage follower gear (I) when the diameter of tire converse actual engine rotating speed or Vehicle Speed.

Above-described only is preferential embodiment of the present utility model.Should be pointed out that to those skilled in the art under the prerequisite that does not break away from the utility model principle, can also make some modification and improvement, this also is considered as belonging to protection domain of the present utility model.

Claims (1)

1, a kind of rotating speed inductor, include the shell group upright (A) that constitutes by shell (A1) and lining (A2), described lining (A2) imbeds shell (A1) lining, it is characterized in that: it also comprises the magnetite (D) that is fixed in the shell (A1), described magnetite (D) directly attaches with Hall IC (B), and is sealed in shell group upright (A) by O-ring seal (G).

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