CN212721465U

CN212721465U - Torque angle sensor

Info

Publication number: CN212721465U
Application number: CN202022041053.1U
Authority: CN
Inventors: 梁高峰; 李响
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-03-16
Anticipated expiration: 2030-09-17
Also published as: DE112021001258T5; WO2022058239A1

Abstract

The utility model relates to a moment of torsion angle sensor installs on the steering column for detect vehicle steering wheel pivoted steering torque and angle, moment of torsion angle sensor includes moment of torsion induction unit, angle induction unit and PCB board (3), moment of torsion induction unit includes signal input rotor (4) and signal output rotor (1), angle induction unit includes an intermediate gear (6) and response gear (8), wherein intermediate gear (6) and response gear (8) meshing, be provided with first inductor (61) and second inductor (62) on response gear (8).

Description

Torque angle sensor

Technical Field

The utility model relates to a sensor, a be configured to be used for monitoring the integrated moment of torsion angle sensor of the turning to situation of vehicle.

Background

The torque angle sensor integrates the torque sensor and the angle sensor together and is used for measuring the rotation angle of a steering wheel of the vehicle and the magnitude of the received torque. The conventional torque angle sensor includes a cover, a torque measuring module, an angle measuring module, a connector, and a housing. When the torque angle sensor is used, the torque angle sensor is installed on a steering column of a steering wheel, in order to protect the torque angle sensor, an outer shell and an outer cover body which are assembled together are further arranged on the steering column and used for containing and protecting the torque angle sensor, an input switching connector and an output switching connector are arranged on the outer cover body, the input switching connector is used for being electrically connected with a connector of the torque angle sensor, and the output switching connector is electrically connected with an electronic control device through connectors arranged at two ends of the output switching connector, so that signals of the torque angle sensor are transmitted to the electronic control device.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a moment of torsion angle sensor, it can satisfy the redundant demand to vehicle steering wheel pivoted steering angle measurement.

First, according to an aspect of the present invention, it provides a torque angle sensor, installed on a steering column, for detecting a steering torque and an angle of a steering wheel of a vehicle, the torque angle sensor including a torque sensing unit, an angle sensing unit and a PCB board, the torque sensing unit including a signal input rotor and a signal output rotor, the angle sensing unit including an intermediate gear and a sensing gear, wherein the intermediate gear is engaged with the sensing gear, and the sensing gear is provided with a first sensor and a second sensor.

According to a possible embodiment, the first inductor is a magnet, the second inductor is a metal rotor, and the second inductor comprises at least one fan blade.

According to a possible embodiment, the first inductor and the second inductor are fixed to the induction gear by welding, insert molding or press-fit connection.

According to a possible embodiment, the induction gear, the first inductor and the second inductor are coaxially arranged, and the first inductor and the second inductor are arranged at intervals.

According to a possible implementation manner, the PCB board includes a first angle sensing chip and a second angle sensing chip, the first angle sensing chip is a hall chip, the second angle sensing chip is an electromagnetic sensing chip, or the second angle sensing chip adopts a chip based on at least one of resistance strain type sensing, inductive type sensing, capacitive type sensing, piezoelectric type sensing and photoelectric type sensing.

According to a possible embodiment, the PCB is provided with a magnetic field generating and collecting component for measuring angles, which is implemented as a coil formed by a printed circuit, and is formed by winding according to a certain winding rule, and is arranged in a substantially concentric circular shape.

According to one possible embodiment, the signal input rotor comprises a first set of blades and the signal output rotor comprises a second set of blades.

According to one possible embodiment, the signal input rotor and the signal output rotor are respectively configured to be disposed on mutually opposite ends of an input shaft and an output shaft of a steering column of a vehicle, to rotate coaxially with the steering column.

According to a possible implementation manner, the PCB board includes a magnetic field generating and collecting component for measuring the torque and a torque sensing chip, and the PCB board senses the angle signals of the signal input rotor and the signal output rotor by using electromagnetic induction, resistance strain type sensing, inductive type sensing, capacitive type sensing, piezoelectric type sensing, photoelectric type sensing or hall type sensing.

According to one possible embodiment, the torque angle sensor comprises a housing the torque sensing unit, the angle sensing unit and the PCB board.

Compared with the prior art, the utility model discloses torque angle sensor sets up first inductor and second inductor on its response gear, is responded to by first angle response chip and second angle response chip respectively to can utilize the response principle of two kinds of differences to reachd the absolute angle that two sets of independent vehicle steering wheel pivoted turned to respectively, not only can satisfy the redundant demand to vehicle steering wheel pivoted steering angle measurement, detected signal is more reliable and more stable, with low costs moreover, not extra occupation space.

Drawings

The foregoing and other aspects of the invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic view showing an assembly of parts of elements of a torque angle sensor configured to detect a steering torque and an angle of rotation of a steering wheel, in which a torque sensing unit and an angle sensing unit are shown.

Fig. 2 is a schematic sectional view showing an assembly of parts of elements of a torque angle sensor configured to detect steering torque and angle of rotation of a steering wheel, in which a torque sensing unit, an angle sensing unit, and a PCB board are shown.

Fig. 3 shows a further schematic view of a partial component assembly of a torque angle sensor configured to detect steering torque and angle of steering wheel rotation, in which a first inductor, a second inductor and a PCB board of an angle sensing unit are shown.

Detailed Description

The invention is described in detail below by means of exemplary embodiments.

In the following, some exemplary embodiments of the invention will be described in more detail with reference to the accompanying drawings in order to better understand the basic ideas and advantages of the invention.

A steering column (not shown) of a vehicle includes an input shaft from a steering wheel, an output shaft to a steering shaft connector (not shown), and a torsion bar connected between the input shaft and the output shaft. When the steering wheel is stressed, the torsion bar deforms, and by utilizing the known mechanical characteristics of the material of the torsion bar, the steering torque for steering the steering wheel can be determined based on the relative rotation angle of the input shaft relative to the output shaft, which can represent the torsional deformation of the torsion bar. The structure of a steering column of a vehicle is well known to those skilled in the art and will not be described herein.

Referring to fig. 1 to 3, the torque angle sensor according to an embodiment of the present invention is mounted on a steering column for detecting a steering torque and an angle of a steering wheel of a vehicle, and includes a torque sensing unit, an angle sensing unit, and a PCB 3. The torque sensing unit comprises a signal input rotor 4 and a signal output rotor 1, the angle sensing unit comprises an intermediate gear 6 and a sensing gear 8, wherein the intermediate gear 6 is meshed with the sensing gear 8, and a first sensing body 61 and a second sensing body 62 are arranged on the sensing gear 8.

The signal input rotor 4 comprises a first set of blades and the signal output rotor 1 comprises a second set of blades. The signal input rotor 4 and the signal output rotor 1 are respectively configured to be arranged at the opposite end parts of an input shaft and an output shaft of a steering column of a vehicle, specifically, the signal input rotor 4 is sleeved on the input shaft of the steering column and rotates coaxially with the input shaft, the signal output rotor 1 is sleeved on the output shaft of the steering column and rotates coaxially with the output shaft, so that the torque between the input shaft and the output shaft can be converted into the torque between the signal input rotor 4 and the signal output rotor 1, and the torque measurement of steering of a steering wheel can be completed by measuring the torque between the signal input rotor 4 and the signal output rotor 1.

The first inductor 61 on the induction gear 8 is, for example, a magnet, and the second inductor 62 is, for example, a metal rotor, and in this embodiment, the second inductor 62 includes at least one fan blade. The first inductor 61 and the second inductor 62 are fixed to the induction gear 8 by welding, insert molding, press fitting, or other connection methods. The induction gear 8, the first inductor 61 and the second inductor 62 are coaxially arranged, and the first inductor 61 and the second inductor 62 are arranged at intervals, where the intervals are that the first inductor 61 and the second inductor are separated by a certain distance and do not contact each other. The intermediate gear 6 is sleeved and fixed on the signal output rotor 1, and the signal output rotor 1 and the intermediate gear 6 can be fixed together through welding, insert injection molding, pressing and other connection modes. It will be appreciated that in other embodiments, the intermediate gear 6 may be sleeved and fixed on the signal input rotor 4.

In this embodiment, the PCB 3 is sleeved on the input shaft, the PCB 3 includes a magnetic field generating and collecting component (not shown) for measuring torque and a torque sensing chip 31, when the signal input rotor 4 and the signal output rotor 1 rotate, the first blade group of the signal input rotor 4 and the second blade group of the signal output rotor 1 cut the magnetic field generated by the PCB, and the torque sensing chip 31 on the PCB 3 senses the rotation angle of the first blade group of the signal input rotor 4 and the second blade group of the signal output rotor 1 by the electromagnetic induction principle, and multiplies the rotation angle by a torsion bar coefficient, thereby measuring two paths of cross torque and angle signals. The magnetic field generating and collecting means (not shown) for measuring the torque are realized as coils formed by printed circuits. The PCB 3 may also sense the angular signals of the input rotor 4 and the output rotor 1 by other conventional means, such as a chip using at least one of resistance strain sensor, inductive sensor, capacitive sensor, piezoelectric sensor, photoelectric sensor or hall sensor.

The PCB board 3 includes a first angle sensing chip 321 and a second angle sensing chip 322. The first angle sensing chip 321 is a hall chip, and the second angle sensing chip 322 is an electromagnetic sensing chip. The PCB 3 is provided with a magnetic field generating and collecting component 323 for measuring angles, the magnetic field generating and collecting component 323 for measuring angles is realized by a coil formed by a printed circuit, and is formed by winding according to a certain winding rule, the magnetic field generating and collecting component 323 is approximately arranged in a concentric ring shape, and the number of winding turns and the winding rule are determined according to actual requirements and parameters. When the rotation angle of the input/output shaft is greater than 360 degrees, the intermediate gear 6 drives the induction gear 8, the first angle induction chip 321 senses and calculates the rotation angle position of the induction gear 8 through the first inductor 61 based on the hall induction principle and outputs a first path of turn number following signal to an ECU (electronic control unit) (not shown), the first path of turn number following signal and an initial turn angle signal calculated by the torque induction chip 31 are accurately calculated through vernier algorithm coupling inside the ECU to obtain a final required absolute angle signal of the rotation of the vehicle steering wheel; in addition, the fan blades of the second inductor 62 cut the magnetic field generated by the PCB, the second angle induction chip 322 on the PCB 3 induces the second inductor 62 by the electromagnetic induction principle, senses and calculates the rotation angle of the induction gear 8 and outputs a second path of turn number following signal to the ECU control unit, the second path of turn number following signal and the torque induction chip 31 calculate a path of initial turn angle signal, and the final required absolute angle signal of the vehicle steering wheel rotation is accurately calculated by the vernier algorithm coupling inside the ECU control unit. The second angle sensing chip 322 on the PCB 3 may also be other types of chips, for example, a chip that uses at least one of the principles of resistance strain sensor, inductive sensor, capacitive sensor, piezoelectric sensor, and photoelectric sensor to obtain the angle signal of the second sensor 62.

The utility model discloses torque angle sensor is still including acceping torque sensing unit, angle sensing unit and PCB board 3's shell (not shown), and the type column structure of shell is confirmed according to actual demand and parameter, and the shape structure of shell is known for the general technical personnel in this field, and is not repeated here.

The utility model discloses torque angle sensor sets up first inductor 61 and second inductor 62 on its response gear, is responded to by first angle response chip 321 and second angle response chip 322 respectively to can utilize the response principle of two kinds of differences to reachd the absolute angle that two sets of independent vehicle steering wheel pivoted turned to respectively, not only can satisfy the redundant demand to vehicle steering wheel pivoted angle of turning to, detected signal is more reliable and more stable, and is with low costs, not extra occupation space moreover.

Although the invention is illustrated and described herein with reference to specific embodiments, the invention is not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope of the invention.

Claims

1. The utility model provides a torque angle sensor, installs on the steering column for detect vehicle steering wheel pivoted steering torque and angle, torque angle sensor includes torque sensing unit, angle sensing unit and PCB board (3), its characterized in that: the torque sensing unit comprises a signal input rotor (4) and a signal output rotor (1), the angle sensing unit comprises an intermediate gear (6) and a sensing gear (8), the intermediate gear (6) is meshed with the sensing gear (8), and a first sensing body (61) and a second sensing body (62) are arranged on the sensing gear (8).

2. The torque angle sensor according to claim 1, wherein the first inductor (61) is a magnet, the second inductor (62) is a metal rotor, the second inductor (62) comprising at least one fan blade.

3. Torque angle sensor according to claim 2, wherein the first (61) and second (62) sensitive bodies are fixed to the sensing gear (8) by means of welding, insert moulding or press-in connection.

4. Torque angle sensor according to claim 3, wherein said sensing gear (8), a first sensing body (61) and a second sensing body (62) are coaxially arranged, said first sensing body (61) being arranged spaced apart from said second sensing body (62).

5. The torque angle sensor according to claim 4, wherein the PCB board (3) comprises a first angle sensing chip (321) and a second angle sensing chip (322), the first angle sensing chip (321) being a Hall chip and the second angle sensing chip (322) being an electromagnetic sensing chip, or the second angle sensing chip (322) being a chip employing at least one principle of resistive strain sensing, inductive sensing, capacitive sensing, piezoelectric sensing and photoelectric sensing.

6. The torque angle sensor according to claim 5, wherein the PCB (3) is provided with a magnetic field generating and collecting member (323) for angle measurement, the magnetic field generating and collecting member (323) for angle measurement being implemented as a coil formed by a printed circuit, being formed by winding according to a certain winding rule, and being arranged in a substantially concentric circular shape.

7. Torque angle sensor according to claim 6, wherein said signal input rotor (4) comprises a first set of blades and the signal output rotor (1) comprises a second set of blades.

8. The torque angle sensor according to claim 7, wherein the signal input rotor (4), the signal output rotor (1) are respectively configured to be disposed on mutually opposite ends of an input shaft, an output shaft of a steering column of a vehicle, to rotate coaxially with the steering column.

9. The torque angle sensor according to claim 5, wherein the PCB (3) comprises a magnetic field generating and collecting component for measuring torque and a torque sensing chip (31), and the PCB (3) senses the angle signals of the signal input rotor (4) and the signal output rotor (1) by electromagnetic induction, resistance strain gauge sensing, inductive sensing, capacitive sensing, piezoelectric sensing, photoelectric sensing or Hall sensing.

10. The torque angle sensor according to claim 9, wherein the torque angle sensor comprises a housing accommodating the torque sensing unit, angle sensing unit and PCB board (3).