CN2844989Y

CN2844989Y - Non-contact linear positioning sensor

Info

Publication number: CN2844989Y
Application number: CN 200520044744
Authority: CN
Inventors: 甄力; 周骏; 薛亚峰
Original assignee: Shanghai Powermax Technology Inc
Current assignee: Shanghai Powermax Technology Inc
Priority date: 2005-09-02
Filing date: 2005-09-02
Publication date: 2006-12-06
Anticipated expiration: 2015-09-02

Abstract

The utility model relates to a non-contact linear position sensor, which comprises a sensor cover, a rotor and a sensor housing which are mechanically connected in turn. The utility model is characterized in that the rotor is provided with a rotor head and a rotor body, wherein the rotor head and the rotor body are connected, the rotor head is provided with a placing groove, and the rotor body is provided with a connecting groove; the sensor housing is provided with an embedding groove and a hollow pipe, and the hollow pipe is connected to the bottom center of the housing along the axial direction and matches with the rotor body. Besides, magnetic steel is placed on the placing groove of the rotor head, a linear Hall integrated circuit block is embedded into the embedding groove on the sensor housing, and the magnetic steel is in Hall magnetic induction connection with a Hall element so that the Hall integrated circuit block outputs linear voltage signals; the hollow pipe penetrates through a positioning plate of a shift system and is fixed by a gasket and a screw cap; after the rotor body penetrates through the hollow pipe, the connecting groove on the tail part of the rotor body is connected with a transmission arm of the shift system through a crank. The utility model has the advantages of extension of the service life of components, small size, strong anti-interference ability, high linear precision, large application range of environment temperature, low noise, small rotatory damping, etc.

Description

Contactless linear position sensor

Technical field

The utility model relates to a kind of linear position sensor, more particularly, is a kind of industrial sewing machine that is applicable to, pinpoint sensor in the displacement control system such as Electric Machine Control and lathe.

Background technology

Linear position sensor is widely used in industrial sewing machine and lathe displacement control system, normally used linear position sensor all belongs to contact, for example, carbon film potentioneter and conductive plastic potentiometer, though have simple in structure, easy to use and advantage that cost is low, but exist linear precision low, mission life is short, and the shortcoming that damping due to rotation is high is not suitable for frequent use.

Summary of the invention

As mentioned above, how to improve the precision of linear position sensor, serviceable life and to be suitable for frequent the use be technical problem to be solved in the utility model, therefore, the purpose of this utility model is to provide a kind of contactless linear position sensor.

The technical solution of the utility model is as follows:

According to a kind of contactless linear position sensor of the present utility model, comprise successively sender unit cap with mechanical connection, rotor and sensor housing, characteristics are: a: this rotor has rotor head and the rotor block that is connected, and on rotor head, be provided with the magnet steel resettlement groove, on the afterbody of rotor block, be provided with link slot; B: this sensor housing be provided with linear Hall integrated circuit block embedding slot and housing bottom central authorities connect vertically establish one with rotor block suitable externally threaded hollow tube arranged; C: on the magnet steel resettlement groove of the rotor head of rotor, settle magnet steel and on the linear Hall integrated circuit block embedding slot on the sensor housing, set the linear Hall integrated circuit block, this magnet steel becomes Hall magnetic induction to connect with the on-chip Hall element of linear Hall, and exports linear voltage at the output terminal of this linear Hall integrated circuit block; This external thread hollow tube of d is worn the location-plate of footpath one shift system, and by a packing ring and fixed by nut; This rotor block of e wear the link slot at its afterbody place behind this external thread hollow tube of footpath via a crank with shift system in transmission arm connect.

Further, described magnet steel is a sector structure, and two angle limits of magnet steel are respectively the S utmost point and the N utmost point, and, all be linear change from the S utmost point to the N utmost point, respective output voltages is by electrodeless regulated linear voltage, from DC 0.03V～4.85V.

At the joint of sensor housing and external thread hollow tube, rotor block is put the saddle shaped washer that prevents axial float.

More specifically, magnet steel is positioned at the 1mm place, top, magnetic induction sensitizing range of linear Hall integrated circuit block.

The utility model has the advantages that, provide contactless linear position sensor function, therefore, improve the serviceable life of device greatly, but also it is little to have a volume, antijamming capability is strong, the linear precision height, advantages such as environment temperature accommodation is big, and low noise is exported, and damping due to rotation is little, can be widely used in sewing machine, machinery, light textile, chemical industry etc. need carry out the occasion of Accurate Position Control.

Description of drawings

Fig. 1 is a combination schematic perspective view of the present utility model;

Fig. 2 is the utility model combination perspective exploded view;

Fig. 3 is a linear position sensor head perspective exploded view of the present utility model;

Fig. 4 is the linear Hall integrated circuit calcspar in the utility model;

Fig. 5 is the external form and the magnetizing direction synoptic diagram of the fan-shaped magnet steel in the utility model.

Embodiment

Provide better embodiment of the utility model according to Fig. 1～Fig. 5 below, it is applied to industrial sewing machine and carries out accurate positioning control.

As depicted in figs. 1 and 2, it is to be applied to sewing machine to carry out essence position control; rocking arm 16 is installed in above the sewing machine pedal; driving rocker 15 by screw retention on rocking arm 16; sensor head main body and by packing ring 12; nut 13 is installed on the sewing machine location-plate 11; location-plate 11 is fixed on above the pedal; crank 14 is installed in the link slot 1024 (referring to Fig. 3) of the afterbody of rotor 102; be screwed; drive when moving up and down when external force like this; transmission arm 15 just begins to rotate; thus rotor 102 is rotated; the magnet steel 107 on it is just done relative motion (referring to Fig. 3) with the linear Hall integrated circuit block 106 that is installed on the sensor housing, and like this, the control voltage signal that just produces DC 0.03V～4.85V carries out accurate positioning control.

Referring to Fig. 3, sensor head main body 10 in the utility model comprises the sender unit cap 101 that becomes mechanical connection successively, rotor 102, saddle type pad 103, sensor housing 104 and externally threaded hollow tube 105 is arranged, rotor 102 is connected to form by rotor head 1021 and rotor block 1022, or one-body molded two joint structures, the afterbody that rotor head 1021 is provided with fan-shaped magnet steel resettlement groove 1023 and rotor block 1022 is provided with link slot (1024), sensor housing 104 is provided with Hall integrated circuit piece embedding slot 1041, respectively fan-shaped magnet steel 107 and linear Hall integrated circuit block 106 pack into resettlement groove 1023 and sensor housing 104 embedding slots 1041 on the rotor 102.When being assembled into one, magnet steel 107 is positioned at the 1mm place, top, magnetic strength sensitizing range of the Hall element on the linear Hall integrated circuit block 106.

Referring to Fig. 4 and Fig. 5, when rotor 102 is subjected to that external force drives and when rotating, because the Hall perception produces DC 0.03V～4.85V Linear Control voltage signal, as shown in Figure 5, the fan-shaped angle of fan-shaped magnet steel 107 is 120 ° to fan-shaped magnet steel 107 with linear Hall integrated circuit block 106.

Claims

1, a kind of contactless linear position sensor comprises successively the sender unit cap (101) with mechanical connection, rotor (102), and sensor housing (104) is characterized in that:

A. this rotor (102) has rotor head (1021) and the rotor block (1022) that is connected, and, on rotor head, be provided with magnet steel resettlement groove (1023), on the afterbody of rotor block (1022), be provided with link slot (1024);

B. this sensor housing (1044) be provided with linear Hall integrated circuit block embedding slot (1041) and housing bottom connect vertically establish one with this rotor block (1022) suitable externally threaded hollow tube (105) arranged;

C. go up at the magnet steel resettlement groove (1023) of the rotor head (1021) of rotor (102) and settle magnet steel (107) and on the linear Hall integrated circuit block embedding slot (1041) on the sensor housing (104), set linear Hall integrated circuit block (106), this magnet steel (107) becomes Hall magnetic induction to connect with Hall element on the linear Hall integrated circuit block (106), and is provided with linear voltage output signal terminal;

D. this external thread hollow tube (105) passes the location-plate (11) of a shift system, and fixing by a packing ring (12) and a nut (13);

E. after this rotor block (1022) passes this external thread hollow tube (105), the link slot at its afterbody place (1024) via a crank (14) with mobile system in transmission arm (15) connect.

2, contactless linear position sensor according to claim 1 is characterized in that, described magnet steel is sector structure, and two angle limits of fan-shaped magnet steel are respectively the S utmost point and the N utmost point.

3, contactless linear position sensor according to claim 2 is characterized in that, described fan-shaped magnet steel all is linear change to the S utmost point or by the S utmost point to the N utmost point by the N utmost point.

4, contactless linear position sensor according to claim 3 is characterized in that, the voltage that hall sensing produces is stepless regulated linear voltage, from DC 0.03V～4.85V.

5, contactless linear position sensor according to claim 1, it is characterized in that, be positioned at sensor housing (104) and external thread hollow tube (105) joint, on rotor block (1022), be inserted in the packing ring (103) that prevents rotor (102) axial float.

6, contactless linear position sensor according to claim 5 is characterized in that, said packing ring (103) is the saddle type.

7, contactless linear position sensor according to claim 1 is characterized in that, fan-shaped magnet steel (107) is positioned at the 1mm place, top, magnetic induction sensitizing range of linear Hall integrated circuit block (106).

8, according to claim 2 or 3 described contactless linear position sensors, it is characterized in that the fan-shaped angle of described fan-shaped magnet steel is 120 °.