CN202032995U

CN202032995U - Rotary position sensor

Info

Publication number: CN202032995U
Application number: CN2011200255040U
Authority: CN
Inventors: 顾健; 戴德明
Original assignee: Hamlin Electronics Suzhou Co Ltd
Current assignee: Hamlin Electronics Suzhou Co Ltd
Priority date: 2011-01-26
Filing date: 2011-01-26
Publication date: 2011-11-09
Anticipated expiration: 2021-01-26

Abstract

The utility model relates to a rotary position sensor, and a main body is a housing. The rotary position sensor is characterized in that the inside of the housing is provided with a driving wheel and a driven wheel which engage with each other; the inside of the driven wheel is embedded with a magnet, and the inside of the driving wheel is provided with a connecting groove; the driving wheel is connected with a shaft via the connecting groove; and a sensor circuit is formed in a position corresponding to the magnet via the magnetic field and an electronic element. The inside of the sensor includes a capacitance and a Hall element. The shape of the connecting groove is in a D shape. The shaft passes through the housing, and protrudes the housing. The external shaft rotatably drives the driving wheel to rotate correspondingly, and the driving wheel sends the rotating position information to the driven wheel, thus making the magnet on the driven wheel generate a corresponding magnetic field change. A Hall chip induces the change, and then generates an electric signal, and the sensor uses the electric signal of the change to feedback the position information of the external shaft. The rotary position sensor is accurate in positioning, simple in structure, and low in cost.

Description

Rotary position transducer

Technical field:

The utility model relates to a kind of sensor, especially relates to a kind of rotary position transducer of axostylus axostyle control position of rotation of penetration sensor body.

Background technology:

At present, the sensor of a kind of Spin Control of widespread position on the market, be attached on the outside axostylus axostyle by ring-shaped magnet, the rotation of axostylus axostyle rotating band rotating ring shape magnet, the magnetic field that changes, and have the metal lamellar body to be in the periphery of magnet, and influencing magnetic field of magnets, the magnetic field that Hall chip is promptly responded to this variation produces electric signal.Magnet that this Technology Need volume is bigger and metal lamellar body, cost is higher, location, rotation back is not accurate, is easy to generate error.

Summary of the invention:

The technical matters that the utility model solves provides a kind of rotary position transducer that reduces cost, precisely feeds back position of rotation.

The technical scheme in the invention for solving the technical problem is: a kind of rotary position transducer, main body is a housing, be provided with the driving wheel and the engaged wheel of engagement in the inside of housing, at the inner magnet that embeds of engaged wheel, driving wheel inside offers link slot, closely connect an axostylus axostyle by link slot, form sensor circuit by magnetic field and electronic component in the magnet corresponding position.

Control outside position of rotation in order to reach sensor type, described axostylus axostyle penetrates the outside at housing, and sensor internal includes electric capacity and Hall element.

For position of rotation is shown precisely, allow axostylus axostyle and driving wheel combine closely, the profile of described link slot is " D " type groove shape.

After adopting said structure, its advantage is: the utility model middle gear simplicity of design is applied to industrial circle in a large number, technology maturation, reliable, the magnet design is not subject to outside axostylus axostyle, economically feasible, by the sensing control of Hall effect, make positioning of rotating more accurate.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the synoptic diagram of meshing gear in the utility model.

Among the figure: 1, housing 2, engaged wheel 3, driving wheel 3-1, link slot 4, axostylus axostyle 5, sensor circuit 5-1, electric capacity 5-2, Hall chip 6, magnet

Embodiment:

A kind of rotary position transducer shown in Figure 1, main body is a housing 1, be provided with the driving wheel 3 and the engaged wheel 2 of engagement in the inside of housing 1, at the engaged wheel 2 inner magnet 6 that embed, driving wheel 3 inside offer link slot 3-1, closely connect an axostylus axostyle 4 by link slot 3-1, form sensor circuit 5 by magnetic field and electronic component in magnet 6 corresponding positions; Comprise electric capacity 5-1, Hall chip 5-2 in the sensor circuit 5, axostylus axostyle 4 penetrates in the outside of housing 1, reaches the effect that sensor type is controlled outside position of rotation.

In the meshing gear shown in Figure 2, the inside of engaged wheel 2 embeds magnet 6, forms loop inductance with electric capacity 5-1, Hall chip 5-2; The profile of link slot 3-1 is " D " type groove shape, and assurance axostylus axostyle 4 is combined closely with driving wheel 3, reaches the position of rotation accurate positioning.

Sensor circuit 5 is used to respond to the changes of magnetic field of the magnet 6 on the engaged wheel 2, pass through hall principle, export corresponding electric signal, engaged wheel 2 is used for device magnet 6, and meshes with driving wheel 3, drive magnet 6 rotations, produce changes of magnetic field, driving wheel 3 closely cooperates with outside axostylus axostyle 4, driven by outside axostylus axostyle 4, cooperate and drive driving wheel 3 and rotate the objective body that outside axostylus axostyle 4 will be surveyed for rotary position transducer.Outside axostylus axostyle 4 rotations drive that driving wheel 3 is corresponding makes rotation, driving wheel 3 passes to engaged wheel 2 with the positional information of rotation, thereby the magnetic field that causes the magnet 6 on the engaged wheel 2 to produce respective change, Hall chip 5-2 responds to this and changes the generation electric signal, and sensor promptly utilizes the electric signal of this variation to feed back the positional information of outside axostylus axostyle 4.

Claims

1. rotary position transducer, main body is a housing (1), it is characterized in that: the driving wheel (3) and the engaged wheel (2) that are provided with engagement in the inside of housing (1), at the inner magnet (6) that embeds of engaged wheel (2), driving wheel (3) inside offers link slot (3-1), closely connect an axostylus axostyle (4) by link slot (3-1), form sensor circuit (5) by magnetic field and electronic component in magnet (6) corresponding position.

2. rotary position transducer according to claim 1 is characterized in that: the profile of described link slot (3-1) is " D " type groove shape.

3. rotary position transducer according to claim 1 is characterized in that: described axostylus axostyle (4) penetrates the outside in housing (1).