CN220289635U - Speed sensor for converting output waveform by induction magnetic field - Google Patents

Abstract

The utility model provides a speed sensor for converting output waveforms of an induction magnetic field, which belongs to the technical field of sensors and comprises the following components: the sensing head is of a stepped shaft structure, a Hall chip, a back magnet and a support are arranged in the sensing head, the Hall chip is close to the back magnet, a circuit board is arranged in the support, the Hall chip and the support are sequentially arranged along the length direction of the sensing head, and pins of the Hall chip are electrically connected with the circuit board; one end of the cable is connected with the circuit board, and the other end of the cable is connected with the plug-in assembly; the beneficial effects of the utility model are as follows: hall chip, back of body magnetic iron and support are arranged in proper order along the length direction of sensing head, and the sensing head passes through the cable conductor and is connected with the plug-in components and output signal, so the compact structure of sensing head, small in size, the required space is less when the installation.

Description

Speed sensor for converting output waveform by induction magnetic field

Technical Field

The utility model belongs to the technical field of sensors, and relates to a speed sensor for converting an output waveform of an induction magnetic field.

Background

The speed sensor is one of the most core parts of the gearbox, the gearbox is one of the most core parts of the automobile, and along with the continuous development of the global automobile industry in the electric, intelligent and informationized directions, the gearbox technology is also suitable for the development of hybrid electric automobiles and electric automobiles, and a new revolution is improved.

The speed sensor can sense the rotating speed of the target gear so as to output a corresponding signal, and the existing speed sensor has the defects of large volume, unreasonable structural design, occupation of large space during installation, small mounting hole and small volume of the sensor head, and has a certain improvement space.

Disclosure of Invention

The present utility model has been made in view of the above problems occurring in the prior art, and an object of the present utility model is to provide a speed sensor for converting an output waveform by an induced magnetic field.

The aim of the utility model can be achieved by the following technical scheme: a speed sensor for sensing a magnetic field transformed output waveform, comprising:

the sensing head is of a stepped shaft structure, a Hall chip, a back magnetic magnet and a support are arranged in the sensing head, the Hall chip is close to the back magnetic magnet, a circuit board is arranged in the support, the Hall chip and the support are sequentially arranged along the length direction of the sensing head, and pins of the Hall chip are electrically connected with the circuit board;

and one end of the cable is connected with the circuit board, and the other end of the cable is connected with a plug-in assembly.

Preferably, the circuit board is provided in a shape having a narrow front end and a wide rear end, and the narrow end of the circuit board is close to the hall chip.

Preferably, an O-ring is arranged on the outer circumferential surface of the sensing head.

Preferably, a bushing plate is arranged on the sensor head, and a through hole for penetrating the screw is formed in the bushing plate.

Preferably, a rubber tube is sleeved on the cable wire.

Preferably, the connector assembly has a power port, a ground port and an output port.

Compared with the prior art, the utility model has the beneficial effects that:

1. hall chip, back of body magnetic iron and support are arranged in proper order along the length direction of sensing head, and the sensing head passes through the cable conductor and is connected with the plug-in components and output signal, so the compact structure of sensing head, small in size, the required space is less when the installation.

2. The plug-in assembly provides working voltage for the sensing head through the power port, so that the sensing head can work, the Hall chip of the sensing head senses magnetic field conversion of the target wheel under the magnetic field of the back magnetic magnet, and outputs high level or low level through the output port of the plug-in assembly, so that the function of sensing magnetic field conversion to output voltage waveforms is realized, and then the rotating speed of the target wheel is calculated according to the voltage waveforms.

3. The shape of the circuit board is matched with the stepped shape of the sensing head, so that the circuit board is arranged in a shape with a narrow front end and a wide rear end, the narrow end of the circuit board is close to the Hall chip, and all parts inside the circuit board are reasonably distributed, so that the whole sensing head is very compact in structure, and the speed sensor can resist stronger electromagnetic interference.

Drawings

Fig. 1 is a schematic diagram of a speed sensor according to the present utility model.

FIG. 2 is a schematic diagram of the sensor head of the present utility model aligned with a target wheel.

FIG. 3 is a schematic diagram of the internal structure of the sensor head of the present utility model.

Fig. 4 is a schematic view of a connector assembly according to the present utility model.

Fig. 5 is a schematic view of the mounting boss.

In the figure, 100, a sensor head; 110. a Hall chip; 120. a back magnetic magnet; 130. a bracket; 140. a circuit board; 150. an O-ring; 160. a liner plate; 200. a cable; 210. a rubber tube; 300. a connector assembly; 310. a power port; 320. a ground port; 330. an output port.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1-4, a speed sensor for sensing a magnetic field transformed output waveform, comprising: the sensing head 100 is of a stepped shaft structure, a Hall chip 110, a back magnet 120 and a support 130 are arranged in the sensing head 100, the Hall chip 110 is close to the back magnet 120, a circuit board 140 is arranged in the support 130, the Hall chip 110 and the support 130 are sequentially arranged along the length direction of the sensing head 100, and pins of the Hall chip 110 are electrically connected with the circuit board 140; a cable wire 200, one end of the cable wire 200 is connected with the circuit board 140, and the other end of the cable wire 200 is connected with a plug assembly 300; in the operating state, the hall chip 110 senses the magnetic field transformation of the target wheel under the magnetic field of the back magnet 120, and outputs a voltage waveform signal to the socket assembly 300 through the circuit board 140 and the cable 200.

The sensor head 100 is in a stepped shaft structure, can be matched with a stepped hole of an installation boss to realize installation, a small-sized chip is selected as the Hall chip 110, and when the back magnet 120 is large, pins of the Hall chip 110 bypass the back magnet 120 and are connected with the circuit board 140; the circuit board 140 is connected with the bracket 130, so that the circuit board 140 is installed in the sensor head 100, the shape of the circuit board 140 is matched with the stepped shaft shape of the sensor head 100, namely, the circuit board 140 is arranged in a shape with a narrow front end and a wide rear end, the narrow end of the circuit board 140 is close to the Hall chip 110, and all parts inside the sensor head 100 are reasonably distributed, so that the whole sensor head 100 is very compact in structure, and the speed sensor can resist stronger electromagnetic interference.

The hall chip 110, the back magnet 120 and the bracket 130 are sequentially arranged along the length direction of the sensor head 100, and the sensor head 100 is connected with the connector assembly 300 through the cable 200 and outputs signals, so that the sensor head 100 has compact structure, small volume and small space required during installation.

Based on the above embodiment, the sensor head 100 is electrically connected with the connector assembly 300 through the cable 200 connected with the rear end, which is equivalent to dividing the speed sensor into the sensing part and the connector part, such a reasonable layout effectively reduces the volume of the sensor head 100, transfers the output and power supply part functions to the connector assembly 300, and the connector assembly 300 can be mounted at other positions so as not to occupy the mounting space. It should be noted that a terminal and seal plug connection is employed between connector assembly 300 and cable 200.

In addition to the above embodiments, the connector assembly 300 has the power port 310, the ground port 320, and the output port 330, and the connector assembly 300 is connected to the power source through the power port 310, so that the connector assembly 300 can provide the operating voltage to the sensor head 100. The hall chip 110 of the sensor head 100 senses the magnetic field transformation of the target wheel under the magnetic field of the back magnet 120, and outputs a high level signal or a low level signal through the output port 330 of the socket assembly 300, thereby outputting a voltage waveform, and then calculates the rotation speed of the target wheel according to the voltage waveform.

In addition to the above embodiment, the outer peripheral surface of the sensor head 100 is provided with an O-ring 150. The O-ring 150 plays a role in sealing, and in a practical structure, the sensor head 100 is inserted into the stepped hole of the mounting boss, and the O-ring 150 seals with the stepped hole, so that the sensor head 100 can be clamped with the stepped hole and sealing between the two is ensured.

As shown in fig. 1 to 5, in the above embodiment, the sensor head 100 is provided with a bushing plate 160, and the bushing plate 160 is provided with a through hole (not shown) for inserting a screw. Screw holes are formed at corresponding positions of the mounting bosses, the through holes are aligned with the screw holes, and screws pass through the through holes to be connected with the screw holes, so that the bushing plate 160 is fixedly connected with the mounting bosses, and the sensor head 100 is fixedly connected with the mounting bosses.

In addition to the above embodiment, the rubber tube 210 is sleeved on the cable 200, and the rubber tube 210 can protect the cable 200.

The speed sensor is installed in the following steps: the sensor head 100 is inserted into a stepped hole of the mounting boss, the O-shaped ring 150 on the sensor head 100 is matched with the wall surface of the stepped hole to realize sealing, the through hole of the bushing plate 160 is aligned with the threaded hole of the mounting boss, the bushing plate 160 is connected with the mounting boss through a screw, so that the sensor head 100 is fixedly mounted, the Hall chip 110 is positioned at the front end of the sensor head 100 and is close to and aligned with the target wheel, and then the connector assembly 300 is connected with a corresponding connector to supply power to the sensor head 100 and output a voltage waveform signal.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims (6)

1. A speed sensor for sensing a magnetic field transformed output waveform, comprising:

the sensing head (100), the sensing head (100) is of a stepped shaft structure, a Hall chip (110), a back magnetic magnet (120) and a support (130) are arranged in the sensing head (100), the Hall chip (110) is close to the back magnetic magnet (120), a circuit board (140) is arranged in the support (130), the Hall chip (110) and the support (130) are sequentially arranged along the length direction of the sensing head (100), and pins of the Hall chip (110) are electrically connected with the circuit board (140);

and one end of the cable (200) is connected with the circuit board (140), and the other end of the cable (200) is connected with a plug-in assembly (300).

2. A speed sensor for sensing a magnetic field transformed output waveform as defined in claim 1, wherein: the circuit board (140) is provided in a shape having a narrow front end and a wide rear end, and the narrow end of the circuit board (140) is close to the hall chip (110).

3. A speed sensor for sensing a magnetic field transformed output waveform as defined in claim 1, wherein: an O-ring (150) is provided on the outer peripheral surface of the sensor head (100).

4. A speed sensor for sensing a magnetic field transformed output waveform as defined in claim 3, wherein: the sensor head (100) is provided with a bushing plate (160), and the bushing plate (160) is provided with a through hole for penetrating a screw.

5. A speed sensor for sensing a magnetic field transformed output waveform as defined in claim 1, wherein: a rubber tube (210) is sleeved on the cable (200).

6. A speed sensor for sensing a magnetic field transformed output waveform as defined in claim 1, wherein: the connector assembly (300) has a power port (310), a ground port (320), and an output port (330).