CN212297555U

CN212297555U - Gear sensor

Info

Publication number: CN212297555U
Application number: CN202020602259.4U
Authority: CN
Inventors: 陈恩伟
Original assignee: Zhejiang Woder Technology Group Co ltd
Current assignee: Zhejiang Woder Technology Group Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2021-01-05
Anticipated expiration: 2030-04-21

Abstract

The utility model relates to an use the sensor on the car, especially relate to a keep off position sensor structure. The utility model provides a keep off position sensor, includes the sensor housing, installs the PCB board in the sensor housing, installs the chip on the PCB board, installs rotor structure in the below of sensor housing, rotor structure include the rotor, install magnet on the axial terminal surface of rotor, magnet follows the rotor and rotates, the central line of arranging direction and rotor of PCB board is perpendicular. The utility model provides a gear sensor with low cost, high reliability, 360 degrees of magnet configuration of the gear shifting sensor and high measurement precision; the technical problems of complex structure and coding, low measurement precision and high cost of a gear sensor in the prior art are solved.

Description

Gear sensor

Technical Field

The utility model relates to an use the sensor on the car, especially relate to a keep off position sensor structure.

Background

At present, automobiles are applied more and more widely. The gear shifting is determined by adopting a gear sensor in an automobile gearbox and is a commonly used structure in the gearbox, the existing gear shifting sensor generally comprises a sensor shell, a PCB is arranged in the sensor shell, a Hall chip is arranged on the PCB, then a magnet is arranged on the outer circumferential surface of a rotor, the rotor rotates to drive the magnet to rotate, further the magnetic field intensity is changed, the Hall chip outputs different voltage signals through the change of the magnetic field intensity, the voltage signals output pulses after being processed through the Hall chip, the duty ratio is defined according to the change of the output pulses, and the PRNDS gear is defined by utilizing the duty ratio.

As in the Chinese patent: the novel gear sensor (CN 201520331588.9) comprises a covering die, an embedding hole, a magnet mounting hole, an arc magnet, a magnetic steel covering die, a rubber ring, an upper cover, a glue pouring assembly and an embedding ring; the embedding ring of suit in insert hole and the insert hole is all established to the cover die front end and right-hand member, establishes the arc magnet of magnet mounting hole and the central suit of magnet mounting hole in the centre of cover die, and magnet steel cover die and rubber ring are established in proper order to the both ends of arc magnet, and the upper cover is established to magnet mounting hole upper end, and the encapsulating subassembly is established to the left end of cover die, inside hall chip and the terminal of establishing of encapsulating subassembly.

However, the gear sensor with the structure has the disadvantages of complex structure and code, unstable output, low measurement accuracy and limitation of the rotation angle of the magnet to below 90 degrees.

Disclosure of Invention

The utility model provides a gear sensor with low cost, high reliability, 360 degrees of magnet configuration of the gear shifting sensor and high measurement precision; the technical problems of complex structure and coding, low measurement precision and high cost of a gear sensor in the prior art are solved.

The above technical problem of the present invention is solved by the following technical solutions: the utility model provides a keep off position sensor, includes the sensor housing, installs the PCB board in the sensor housing, installs the chip on the PCB board, installs rotor structure in the below of sensor housing, rotor structure include the rotor, install magnet on the axial terminal surface of rotor, magnet follows the rotor and rotates, the central line of arranging direction and rotor of PCB board is perpendicular. The chip and the magnet are arranged up and down, the magnet rotates along with the rotor, the chip is positioned above the magnet, the magnet can rotate by 360 degrees, new energy of a product is greatly improved, and development input cost is reduced. The rotation of the magnet changes the magnetic field distribution of the space, the 3D Hall chip outputs different electric signals through the change of the magnetic field intensity, the electric signals are processed by the Hall chip to output signals, the duty ratio is defined according to the change of the output signals, and the PRNDS gear is defined by the duty ratio. On with magnet tectorial membrane rotor, rotor structure installs on sensor housing for interact's magnet and chip all are located sensor housing, and relative position between them is very stable, when guaranteeing measurement accuracy, make component quantity reduce, and the structure is more stable, and the cost is lower. The rotor rotates to drive the magnet to rotate, the duty ratio is defined by the change of the angle, the definition is simple, the operation is easy, and the gearbox is suitable for different gearboxes.

Preferably, the magnet is a planar magnet, and the magnet and the PCB are parallel to each other. The planar magnet is convenient to manufacture and install, and the cost is reduced. The chip is located the top of magnet, and magnet is rotatory around the rotor shaft in the horizontal plane, and the chip is located the response magnet angle change.

Preferably, the rotor structure further comprises a rotor base, the rotor is mounted on the rotor base, and the rotor base is detachably connected with the sensor housing. More preferably, the lower end surface of the sensor housing is provided with a hook, the rotor base is disc-shaped, the rotor base is fixed on the rotor, and the hook is clamped on the annular outer edge of the rotor base. Save parts such as screw connection, directly pass through buckle mode joint with the rotor seat on the sensor casing, simple structure, simple to operate has adopted buckle complex mode simultaneously, the durable problem of life-span that the wearing and tearing that have significantly reduced in use rotor and shell lead to.

Preferably, gear marking structures are arranged on the sensor shell and the rotor structure. The gear marking structure comprises a through hole formed in the sensor shell, a clamping hole corresponding to the through hole is formed in a rotor seat in the rotor structure, the through hole is communicated with the clamping hole, and a detachable bolt is arranged in the through hole and the clamping hole. Keep off position mark's the position that keeps off a position, according to customer's demand, programme before dispatching from the factory, leave the factory with the bolt insert cross-under hole and jack in, make things convenient for the customer to confirm P to keep off the position, the customer is according to the demand, with sensor integral erection back in the gearbox, pulls out the bolt, the sensor begins normal work. Baffle marking structure can help the customer correctly install the sensor, simultaneously, still conveniently programs the location and keep off the position.

Preferably, the magnet has a uniform thickness, and the magnet is coated on the center of the upper end surface of the rotor. The magnet with uniform wall thickness can ensure that the magnetic field in a fixed angle range can be uniformly changed, namely the magnetic field is linearly distributed at a fixed angle, so that the duty ratio is conveniently defined, and the adaptability of the sensor is improved. The radian of the magnet is designed to take the rotation angle of the rotor and the uniform change of the magnetic field into consideration. Magnet tectorial membrane is installed on the rotor terminal surface, and magnet installation is firm, has avoided original arc magnet to need plus the outer peripheral surface of arc that the joint structure could fix at the rotor, and simple structure has guaranteed measurement accuracy.

Preferably, the sensor housing is provided with two mounting holes, and the two mounting holes are symmetrically distributed on two sides of the sensor housing.

Therefore, the utility model discloses a keep off position sensor possesses following advantage: the structure is simple, the installation is convenient, the cost is low, the magnet can rotate 360 degrees, the super performance is greatly improved, and the development investment cost is reduced; the thickness of the magnet is uniform, the magnet is mounted by adopting a film covering process, the reliability of the position degree is more excellent, and the measurement precision is improved; the rotor seat is clamped on the sensor shell, so that the installation time and the installation parts are saved, and the structure is stable.

Drawings

Fig. 1 is an exploded perspective view of a gear sensor.

Fig. 2 is a bottom view of the gear sensor of fig. 1.

Fig. 3 is a front view of the installation of the gear sensor.

Fig. 4 is a plan view of the installation of the gear sensor.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example 1:

as shown in fig. 1 and 2, the gear sensor comprises a sensor housing 5, and the sensor housing 5 is formed by injection molding of a nylon material. The connector 1 is attached to the sensor housing 5. The embedded rings 4 are symmetrically arranged on two sides of the sensor shell 5, so that the sensor shell 5 is conveniently fixed on the gearbox 15. A PCB 6 is mounted in the sensor housing 5, and an upper 3D hall sensor chip 13 is mounted on the PCB 6. The lower end face of the sensor shell 5 is evenly provided with 3 hooks 14, the sensor shell is connected with a rotor base 12 through the hooks 14, the rotor base 12 is disc-shaped, and the hooks 14 are clamped on the annular outer edge of the rotor base 8. A rotor is installed at the center of the rotor holder, and the center line of the rotor 12 is perpendicular to the 3D hall sensor chip 13. A magnet 7 is fixed to the upper end surface of the rotor 12 through a coating, and the magnet 7 is a rectangular magnet having a uniform thickness. The magnet 7 is parallel to the 3D hall sensor chip 13. The magnet 7 is rotatable through 360 ° with the rotation of the rotor. The lower extreme of rotor 7 is equipped with fluting 11 to let the below of rotor 12 can install through the elasticity mode, tighten up the fixed with the tip of rotor 7 through jump ring 10 at the lower extreme of rotor.

As shown in fig. 3 and 4, a through hole 2 is formed in the sensor housing 5, a locking hole 9 is formed in a corresponding position on the rotor base 8, the locking hole 9 is communicated with the through hole 2, and a bolt 3 is installed in a hole through which the locking hole 9 is communicated with the through hole 2. After the sensor is mounted on the gearbox 15, the plug 3 is pulled out and the operation is started. The rotor 12 rotates to drive the magnet 7 to rotate, the magnet 7 is coated on the rotor 12, the PCB 6 is arranged at the bottom of the sensor shell 5, the 3D Hall chip 13 is attached to the PCB 6, the rotor 12 and the magnet 7 rotate together to further change the space magnetic field distribution, the 3D Hall chip 13 outputs different electric signals through the change of the magnetic field intensity, the electric signals are processed by the Hall to output signals, the duty ratio is defined according to the change of the output signals, and the PRNDS gear is defined by the duty ratio. On with magnet tectorial membrane rotor, the rotor is fixed on the shell for interact's magnet and chip are all fixed on the shell, and relative position between them is very stable, when guaranteeing measurement accuracy, make component quantity reduce, and the structure is more stable, and the cost is lower. The rotor rotates to drive the magnet to rotate, the duty ratio is defined by the change of the angle, the definition is simple, the operation is easy, and the gearbox is suitable for different gearboxes.

Claims

1. The utility model provides a keep off position sensor, includes sensor housing, installs the PCB board in sensor housing, its characterized in that: install the chip on the PCB board, install rotor structure in the below of sensor housing, rotor structure include the rotor, install magnet on the axial terminal surface of rotor, magnet follows the rotor and rotates, the central line of arranging direction and rotor of PCB board is perpendicular.

2. A gear sensor according to claim 1, wherein: the magnet is a plane magnet, and the magnet is parallel to the PCB.

3. A gear sensor according to claim 1, wherein: the rotor structure still include the rotor seat, the rotor is installed on the rotor seat, rotor seat detachable meets with the sensor casing.

4. A gear sensor according to claim 3, wherein: the lower terminal surface of sensor casing be equipped with the pothook, the rotor seat be the disc, the rotor seat is fixed on the rotor, the pothook joint is on the annular outer edge of rotor seat.

5. The gear sensor according to any one of claims 1 to 4, wherein: and gear marking structures are arranged on the sensor shell and the rotor structure.

6. The gear sensor of claim 5, wherein: the gear marking structure comprises a through hole formed in the sensor shell, a clamping hole corresponding to the through hole is formed in a rotor seat in the rotor structure, the through hole is communicated with the clamping hole, and a detachable bolt is arranged in the through hole and the clamping hole.

7. The gear sensor according to any one of claims 1 to 4, wherein: the thickness of the magnet is uniform, and the magnet is coated in the center of the upper end face of the rotor.

8. The gear sensor according to any one of claims 1 to 4, wherein: the sensor shell is provided with two mounting holes, and the two mounting holes are symmetrically distributed on two sides of the sensor shell.