CN217900743U

CN217900743U - Rotation angle detection device

Info

Publication number: CN217900743U
Application number: CN202221746629.7U
Authority: CN
Inventors: 张强
Original assignee: Jiaxing Jintong Electronic Co ltd
Current assignee: Jiaxing Jintong Electronic Co ltd
Priority date: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-11-25
Anticipated expiration: 2032-07-05

Abstract

The utility model discloses a turned angle detection device, including the mounting, install on the mounting and can not remove linear hall element, install and can follow outside actuating mechanism pivoted magnet subassembly on the mounting, magnet subassembly can change its and linear hall element's relative position when rotating, linear hall element exports different magnitude of voltage when magnet subassembly is in different corners. Compared with a traditional Hall angle detection structure, the Hall angle detection structure has the advantages that the detection angle range is large, the linearity is good, no obstacle exists between rotating parts, and the requirement for a larger steering angle can be met; compared with a potentiometer, the service life is obviously prolonged because no abrasion is caused by non-contact detection.

Description

Rotation angle detection device

Technical Field

The utility model belongs to the technical field of the detection sensor and specifically relates to a turned angle detection device is related to.

Background

The bassinet is the toy that is liked by children nowadays, can design into different forms according to the demand of difference, and wherein electronic bassinet is one of them door class, mainly is driven by the motor, can drive the wheel rotation through rotating the steering wheel and turn to.

In the baby carriage, an angle sensor is mounted to detect the rotation angle of a steering wheel or wheels, and some angle sensors are potentiometers, but the potentiometers are easily worn after long-term use, so that some baby carriages are detected by hall sensors.

Present hall sensor for detecting angle, set up hall element in the casing, both sides at hall element set up an N utmost point magnet and an S utmost point magnet respectively, N utmost point magnet and S utmost point magnet are driven rotatoryly by same part, hall element is located the rotation arc of N utmost point magnet and S utmost point magnet, will export not equidimension hall voltage when N utmost point magnet or S utmost point magnet are close to hall element, but the hall sensor of this kind of structure is because the distance restriction between hall element and the magnet, magnet can break away from hall element' S response scope when turned angle is too big, the less limitation of angle that detects exists.

SUMMERY OF THE UTILITY MODEL

In order to satisfy bigger steering angle requirement, this application provides a turned angle detection device.

The application provides a turned angle detection device adopts following technical scheme:

a rotation angle detection device comprises a fixing piece, a linear Hall element and a magnet assembly, wherein the linear Hall element is installed on the fixing piece and cannot move, the magnet assembly is installed on the fixing piece and can rotate along with an external driving mechanism, the relative position of the magnet assembly and the linear Hall element can be changed when the magnet assembly rotates, and the linear Hall element outputs different voltage values when the magnet assembly is in different rotation angles.

Optionally, the magnet assembly comprises a rotating column, a linkage shaft integrally formed with the rotating column and located at the other end, and a magnet block fixed to the rotating column, wherein the inner ring of the rotating column is hollow, and the magnet block is installed outside the hollow and the magnetic pole of the magnet block is opposite to the axis of the rotating column; the linear Hall element is positioned in the hollow part of the rotating column and is opposite to the magnet block, and the rotating column can be driven to rotate by a steering wheel or a driving mechanism.

Optionally, the magnet block is provided with one or two blocks which are symmetrical to the rotation axis and have consistent magnetic pole directions.

Optionally, the rotating column is provided with a clamping groove penetrating through the inner wall of the rotating column, and the magnet block is fixed in the clamping groove.

Optionally, the mounting is for being hollow shell, the shell includes cavity and is the casing that the upper shed set up, can dismantle the top cap of connecting in casing upper shed department, a through-hole has been seted up at the center of top cap, the universal driving shaft is worn to establish and is rotated and connect in the through-hole, the rotation post is located the casing, the inside cavity of rotation post and the one side that deviates from the top cap are the opening, linear hall element fixed mounting is in the casing and stretches into the rotation post, and its central point is in the coplanar with the magnetic pole center of magnet piece.

Optionally, an annular limiting ring is integrally formed on the bottom wall inside the shell, a limiting groove is formed in the inner ring of the limiting ring, and the outer wall of the rotating column is attached to the inner wall of the limiting ring.

In summary, the rotary column can rotate around the linear hall element with the magnet block, when the rotary column is in the middle position, the magnetic field direction of the magnet block is over against one side surface of the linear hall element, the magnetic fields generated by the magnet block are mutually offset on the front surface and the back surface of the linear hall element, and the linear hall element outputs the intermediate voltage. When the rotating column rotates towards one direction to enable the magnetic field direction of the magnet block to turn to the front surface of the linear Hall element, the magnetic induction intensity of the magnet block on the front surface of the linear Hall element is gradually increased along with the increase of the rotating angle, and the voltage value output by the linear Hall element is also increased. When the magnet block rotates to face the front surface of the linear Hall element, the magnetic induction intensity on the front surface of the linear Hall element is maximum, and the voltage value output by the linear Hall element is also maximum; when the rotating column rotates in the opposite direction to enable the magnetic field direction of the magnet block to turn to the back surface of the linear Hall element, the magnetic induction intensity of the magnet block on the back surface of the linear Hall element is gradually increased, and the voltage value output by the linear Hall element is gradually decreased. When the magnet block rotates to face the back of the linear Hall element, the magnetic induction intensity on the back of the linear Hall element is maximum, and the voltage value output by the linear Hall element is minimum. Therefore, the voltage value output by the linear Hall element can be converted into the rotation angle value of the rotating column, and the detection angle range can reach +/-90 degrees. Compared with a traditional Hall angle detection structure, the detection angle range is large, the linearity is good, no obstacle exists between rotating parts, and the requirement of a larger steering angle can be met; compared with a potentiometer, the service life is obviously prolonged because no abrasion is caused by non-contact detection.

Drawings

Fig. 1 is a schematic structural diagram of a rotation angle detection apparatus disclosed in an embodiment of the present application.

Fig. 2 is a cross-sectional view of a rotation angle detecting device disclosed in an embodiment of the present application.

Fig. 3 (a) is a top sectional view of a rotation angle detecting device disclosed in the present application in a neutral position.

Fig. 3 (b) is a top sectional view of a rotation angle detecting device disclosed in the present application in one of the states.

Fig. 3 (c) is a top sectional view of a rotation angle detecting device disclosed in the present application in another state.

FIG. 4 is a sectional top view showing another structure of a rotation angle detecting apparatus according to the present disclosure

Description of the reference numerals:

1. a housing; 11. a housing; 12. a top cover; 21. a through hole; 2. a linear Hall element; 3. a magnet assembly; 31. rotating the column; 311. a card slot; 32. a magnet block; 33. a linkage shaft; 5. a limiting ring.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses turned angle detection device.

A rotation angle detection device, referring to fig. 1 and 2, comprises a fixed part, a linear Hall element 2 which is arranged on the fixed part and can not move, and a magnet assembly 3 which is arranged on the fixed part and can rotate along with a steering wheel or a driving mechanism, wherein the magnet assembly 3 can change the relative position of a magnet of the magnet assembly and the linear Hall element 2 when rotating, and the linear Hall element 2 outputs different voltage values when the magnet assembly 3 is in different rotation angles. The fixing piece is a hollow shell 1.

The housing 1 includes a hollow housing 11 with an upper opening, and a top cover 12 detachably connected to the upper opening of the housing 11 through screws, and a through hole 21 is formed in the center of the top cover 12. The magnet assembly 3 includes a rotation shaft formed integrally with a magnet block 32 mounted thereon, and the magnet block 32 may be a single magnet or two magnets having the same magnetic pole direction and being symmetrical with respect to the rotation axis as shown in fig. 4. The part of the rotating shaft passing through the through hole 21 and positioned outside the top cover 12 is called a linkage shaft 33, the outer end of the linkage shaft 33 in the first Hall assembly is used for connecting with a steering wheel, and the outer end of the linkage shaft 33 in the second Hall assembly is used for connecting with an external steering wheel or an output shaft of a driving mechanism. The part of the rotating shaft in the housing 11 is called as a rotating column 31, one side of the rotating column 31, which is hollow and departs from the top cover 12, is open, a clamping groove 311 penetrating through the inner wall and the outer wall of the rotating column 31 is formed in the side wall of the rotating column 31, the magnet block 32 is fixed in the clamping groove 311, the magnetic pole of the magnet block 32 points to the axis of the rotating column 31, the linear hall element 2 is fixedly installed in the housing 11 and extends into the rotating column 31, and the center point of the linear hall element is in the same plane with the center of the magnetic pole of the magnet block 32.

Integrated into one piece has and is annular spacing ring 5 on the diapire of casing 11 inside, forms the spacing groove at 5 inner circles of spacing ring, and the outer wall of rotation post 31 fits in the inner wall of spacing ring 5, makes rotation post 31 can be in spacing ring 5 internal stability rotation.

The linear hall element 2 is mounted in the rotary post 31 and fixed to the housing 11. As shown in fig. 3 (a), when the rotary column 31 is at the neutral position, the designated magnetic pole of the magnet block 32 faces one side surface of the linear hall element 2, and the magnetic fields generated by the magnet block 32 cancel each other on the front and back surfaces of the linear hall element 2, thereby outputting an intermediate voltage. As shown in fig. 3 (b), when the rotary column 31 rotates in one direction to rotate the designated magnetic pole of the magnet block 32 to the front surface of the linear hall element 2, the magnetic induction intensity of the magnet block 32 on the front surface of the linear hall element 2 gradually increases as the rotation angle increases, so that the voltage value output by the linear hall element 2 gradually increases; as shown in fig. 3 (c), when the rotary column 31 rotates in the reverse direction to deflect the designated magnetic pole of the magnet block 32 to the back surface of the linear hall element 2, the magnetic induction intensity of the magnet block 32 on the back surface of the linear hall element 2 gradually increases, and the voltage value output from the linear hall element 2 gradually decreases. The voltage value output by the linear hall element 2 can be converted into the angle value of the rotation of the rotary column 31.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A rotation angle detection device is characterized in that: the linear Hall element comprises a fixing piece, a linear Hall element (2) which is installed on the fixing piece and cannot move, and a magnet assembly (3) which is installed on the fixing piece and can rotate along with an external driving mechanism, wherein the magnet assembly (3) can change the relative position of the magnet assembly and the linear Hall element (2) when rotating, and the linear Hall element (2) outputs different voltage values when the magnet assembly (3) is in different rotating angles.

2. A rotation angle detecting device according to claim 1, wherein: the magnet assembly (3) comprises a rotating column (31), a linkage shaft (33) and a magnet block (32), wherein the linkage shaft (33) and the rotating column (31) are integrally formed at the other end of the linkage shaft, the magnet block (32) is fixed on the rotating column (31), the inner ring of the rotating column (31) is hollow, and the magnet block (32) is arranged on the outer side of the hollow and the magnetic pole of the magnet block is opposite to the axis of the rotating column (31); the linear Hall element (2) is positioned in the hollow interior of the rotating column (31) and is opposite to the magnet block (32), and the rotating column (31) can be driven to rotate by a steering wheel or a driving mechanism.

3. A rotation angle detecting device according to claim 2, wherein: the magnet block (32) is provided with one or two blocks which are symmetrical to the rotating axis and have consistent magnetic pole directions.

4. A rotation angle detecting device according to claim 2, wherein: the rotating column (31) is provided with a clamping groove (311) penetrating through the inner wall of the rotating column, and the magnet block (32) is fixed in the clamping groove (311).

5. A rotation angle detecting device according to claim 2, wherein: the mounting is for being hollow shell (1), shell (1) including cavity and be casing (11) that the upper shed set up, can dismantle and connect in top cap (12) of casing (11) upper shed department, one through-hole (21) have been seted up at the center of top cap (12), universal driving shaft (33) are worn to establish and are rotated and connect in through-hole (21), it is located casing (11) to rotate post (31), it just deviates from one side of top cap (12) to rotate the inside cavity of post (31) and is the opening, linear hall element (2) fixed mounting is in casing (11) and stretches into and rotates post (31), and its central point is in the coplanar with the magnetic pole center of magnet piece (32).

6. A rotation angle detecting device according to claim 5, wherein: integrated into one piece has on the diapire of casing (11) inside to be annular spacing ring (5), the inner circle of spacing ring (5) is formed with the spacing groove, the outer wall laminating in the inner wall of spacing ring (5) of rotation post (31).