CN218864984U

CN218864984U - Linear communication type encoder and linear motor using same

Info

Publication number: CN218864984U
Application number: CN202222150436.1U
Authority: CN
Inventors: 刘伟
Original assignee: Zhejiang Ruiying Sensing Technology Co ltd
Current assignee: Zhejiang Ruiying Sensing Technology Co ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2023-04-14
Anticipated expiration: 2032-08-15

Abstract

The utility model discloses a linear communication type encoder and use linear electric motor of this encoder relates to encoder technical field, and linear communication type encoder includes reading head and rather than the metal grating chi of adaptation, the reading head includes the casing, fixedly connected with signal processing board in the casing, the signal processing board is provided with the coil unit, one side lateral wall of casing is the opening setting, the coil unit is located the opening part of casing and sets up towards the metal grating chi, the casing is provided with the cable joint of being connected with the driver, the cable joint is connected mutually with the signal processing board, the signal processing board is provided with the wiring end that is used for being connected with magnetic pole phase detection sensor, the signal processing board gathers the magnetic pole signal of magnetic pole phase detection sensor transmission and transmits to the driver through the wiring end. The method and the device have the effects of improving the accuracy of data transmission and reducing the cost of cables.

Description

Linear communication type encoder and linear motor using same

Technical Field

The application relates to the technical field of encoders, in particular to a linear communication type encoder and a linear motor applying the encoder.

Background

A linear motor is a transmission device that directly converts electric energy into mechanical energy for linear motion without any intermediate conversion mechanism. The rotating motor can be seen as being formed by cutting a rotating motor in a radial direction and spreading the rotating motor into a plane.

In order to find out the initial position of the mover when the coil in the mover of the linear motor is powered on, a magnetic pole phase detection sensor is usually installed on the mover, and when a magnetic pole phase detection sensor body senses the N-S pole of stator magnetic steel on the linear motor, the change of a magnetic field is monitored, and a magnetic pole signal is transmitted to a driver, so that the driver controls the mover of the linear motor to move to the initial position, and the mover can move smoothly relative to the stator.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: because the magnetic pole phase detection sensor is connected with the driver by using the cable, in the actual use process, the position of the case which is usually provided with the driver is fixed, when the moving stroke of the rotor of the linear motor is longer, the cable with longer length needs to be used, and the longer the cable is, the higher the possibility of interference exists, the accuracy of position output and judgment is influenced, and the additional cost of the cable is increased.

SUMMERY OF THE UTILITY MODEL

In order to improve data transmission's accuracy, reduce the cable cost, this application provides a linear communication type encoder and applied this encoder's linear electric motor.

In a first aspect, the present application provides a linear communication type encoder, which adopts the following technical solution:

the utility model provides a sharp communication type encoder, includes reading head and rather than the metal grating chi of adaptation, the reading head includes the casing, fixedly connected with signal processing board in the casing, the signal processing board is provided with the coil unit, one side lateral wall of casing is the opening setting, the coil unit is located the opening part of casing and sets up towards the metal grating chi, the casing is provided with the cable joint of being connected with the driver, the cable joint is connected mutually with the signal processing board, the signal processing board is provided with the wiring end that is used for being connected with magnetic pole phase detection sensor, the signal processing board gathers the magnetic pole signal of magnetic pole phase detection sensor transmission and transmits to the driver through the wiring end.

Through adopting above-mentioned technical scheme, through setting up the wiring end on the signal processing board, the cable that will be connected with magnetic pole phase detection sensor inserts the wiring end, makes the magnetic pole signal that the signal processing board can gather magnetic pole phase detection sensor transmission to send the driver through preset communication protocol, only need shorter cable to communicate from this, not only reduce the produced error in the signal transmission process, can also play the effect that reduces the cable cost simultaneously.

Optionally, the signal processing board is fixedly connected with an indicator light for displaying a state, and an end of the indicator light extends out of the housing.

Through adopting above-mentioned technical scheme, the pilot lamp can more audio-visually embody the running state of encoder, and the operating personnel of being convenient for monitors.

Optionally, the housing is provided with a mounting hole convenient for fixed mounting.

Through adopting above-mentioned technical scheme, conveniently use the screw to carry out fixed mounting.

In a second aspect, the present application provides a linear motor using a linear communication encoder, which adopts the following technical solution:

the utility model provides an use linear electric motor of sharp communication type encoder, includes base, slip table, stator magnet steel, the active cell and the magnetic pole phase detection sensor of relative stator magnet steel motion, still includes the aforesaid linear communication type encoder, slip table fixed connection is in the base, stator magnet steel is along slip table length direction fixed connection in the slip table, the slip table slides and is connected with the active cell, just the active cell is located stator magnet steel directly over, reading head fixed connection in active cell, metal grid chi fixed connection just sets up in base and along slip table length direction, the metal grid chi is located reading head below, magnetic pole phase detection sensor fixed connection is in the active cell, magnetic pole phase detection sensor is located stator magnet steel directly over for detect stator magnet steel's magnetic field signal.

By adopting the technical scheme, the magnetic pole phase detection sensor detects the magnetic field signal of the stator magnetic steel, so that the driver can determine the initial position of the rotor when the coil in the rotor is powered on, the rotor and the stator magnetic steel interact to generate electromagnetic thrust, the rotor can smoothly move linearly and reciprocally along the stator magnetic steel, meanwhile, the reading head monitors the displacement of the rotor and transmits the displacement to the driver, and the state of the linear motor is controlled by the driver.

Optionally, the slip table slides and is connected with the slide, the active cell can be dismantled and connect in the slide, the reading head can be dismantled and connect in the slide lateral wall, magnetic pole phase detection sensor can be dismantled and connect in the slide.

Through adopting above-mentioned technical scheme, through setting up the slide, the maintenance of being convenient for is dismantled active cell, reading head and magnetic pole phase detection sensor.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a signal processing board and a coil unit in an embodiment of the present application.

Fig. 3 is a schematic view of the overall structure of the linear motor in the embodiment of the present application.

Description of reference numerals:

1. a reading head; 2. a metal grid ruler; 3. a housing; 31. a signal processing board; 32. a coil unit; 33. a cable joint; 34. a terminal; 35. an indicator light; 36. mounting holes; 4. a base; 41. a sliding table; 42. stator magnetic steel; 43. a mover; 44. a magnetic pole phase detection sensor; 45. a slide base; 5. a spacing element; 6. a stopper; 7. and a limiting block.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a linear communication type encoder. Referring to fig. 1 and 2, a linear communication type encoder includes a reading head 1 and a metal grid 2 adapted to the reading head 1, the reading head 1 is disposed opposite to the metal grid 2, the reading head 1 includes a housing 3, in this embodiment, the housing 3 is disposed in a hollow rectangular shape, but not limited to a rectangular shape, and the housing 3 is preferably a metal shielding shell for electromagnetic shielding, a signal processing board 31 is fixedly connected to the inside of the housing 3, and the fixing manner may be screw fixing or bonding using glue. The coil unit 32 is fixed to the signal processing board 31, and in the present embodiment, the coil unit 32 is fixed by welding.

Referring to fig. 1, a side wall of a housing 3 is provided with an opening, a coil unit 32 is located at the opening of the housing 3 and is arranged opposite to a metal grid ruler 2, so that when a reading head 1 works, a high-frequency excitation voltage is applied to an excitation coil in the coil unit 32 to generate an alternating electromagnetic field in a space below the housing 3, eddy current effects formed by the electromagnetic field in grids of the metal grid ruler 2 are different, the coil unit 32 generates different electric signals according to different eddy current signals, and the number of the grids passed by a signal processing board 31 is counted in the moving process of the reading head 1, so that the purpose of finally calculating and obtaining a displacement distance is achieved.

Referring to fig. 2, one end of the housing 3 is provided with a cable connector 33 connected to the driver, one end of the cable connector 33 is connected to the signal processing board 31, and the other end of the cable connector 33 extends out of the housing 3 to be connected to the driver. One end of the signal processing board 31 is fixed with a terminal 34 for connecting with the magnetic pole phase detection sensor 44, and a shielding wire connected with the magnetic pole phase detection sensor 44 is connected to the terminal 34 on the signal processing board 31, so that the signal processing board 31 can acquire the magnetic pole signal transmitted by the magnetic pole phase detection sensor 44 through the terminal 34 and transmit the magnetic pole signal to the driver through a preset communication protocol, and the driver can know the initial position of the mover 43 of the linear motor, thereby being beneficial to the smooth operation of the linear motor. In this embodiment, the terminal 34 may be directly fixed and connected to the signal processing board 31, and in other embodiments, a cable may be welded to the signal processing board 31, and an end of the cable may be fixed to the terminal 34.

Referring to fig. 1 and 2, in order to facilitate monitoring of the operating state of the encoder, the signal processing board 31 is fixedly connected with an indicator light 35, and the indicator light 35 extends out of the housing 3, in this embodiment, the indicator light 35 is a two-color LED. Secondly, in order to install the housing 3 on the linear motor conveniently, mounting holes 36 for screws to penetrate are respectively formed at two ends of the housing 3.

The embodiment of the application also discloses a linear motor applying the linear communication type encoder. Referring to fig. 3, a linear motor using a linear communication type encoder includes a base 4, a sliding table 41, a stator magnetic steel 42, a mover 43 moving relative to the stator magnetic steel 42, and a magnetic pole phase detection sensor 44. The sliding table 41 is fixed to the base 4, in the embodiment of the present application, the sliding table 41 and the base 4 may be fixed by screws, and in other embodiments, a welding manner may also be adopted. In stator magnet steel 42 is fixed in slip table 41 along 41 length direction of slip table, in this application embodiment, stator magnet steel 42 can bond in slip table 41 through glue, will keep stator magnet steel 42 to be the level simultaneously.

Referring to fig. 3, the sliding table 41 is slidably connected with a horizontal sliding base 45, the sliding base 45 is located right above the stator magnetic steel 42, and the mover 43 is fixed on the lower surface of the sliding base 45 through a screw, so that a certain air gap is always kept between the mover 43 and the stator magnetic steel 42 without contact, the mover 43 is energized to interact with the stator magnetic steel 42 to generate electromagnetic thrust, and the mover 43 makes linear reciprocating motion on the stator magnetic steel 42.

Referring to fig. 3, the reading head 1 may be fixed to a side wall of the sliding base 45 by a screw fixing member, the metal grid ruler 2 is fixedly connected to the base 4 and is disposed along a length direction of the sliding table 41, the metal grid ruler 2 is disposed on one side of the sliding table 41, and the coil unit 32 in the reading head 1 is directly opposite to the metal grid ruler 2. In the present embodiment, the metal grid 2 is integrally formed on the base 4, and in other embodiments, the metal grid 2 may be adhered to the base 4 by glue. The magnetic pole phase detection sensor 44 is fixed to the slide carriage 45 in a manner of screws, and the magnetic pole phase detection sensor 44 is located right above the stator magnetic steel 42 and is used for detecting a magnetic field signal of the stator magnetic steel 42.

Referring to fig. 3, the side walls at both ends of the sliding table 41 are respectively fixed with a limiting element 5 for limiting the moving stroke of the mover 43 through screws, in this embodiment, the limiting element 5 is a photoelectric switch, and the photoelectric switch is connected with the driver. The slide 45 is fixed with a stop block 6 for blocking a light beam through a screw, when the mover 43 drives the slide 45 to move, the slide 45 drives the stop block 6 to move synchronously, and when the stop block 6 blocks the light beam emitted by the photoelectric switch, the photoelectric switch outputs a trigger signal to the driver, so that the driver controls the mover 43 to stop moving, and the moving stroke of the mover 43 is limited.

The implementation principle of the embodiment of the application is as follows: the magnetic pole phase detection sensor 44 detects a magnetic field signal of the stator magnetic steel 42 and transmits the magnetic field signal to the signal processing board 31 through the wiring terminal 34, the signal processing board 31 transmits the signal to the driver in a communication protocol mode, and then the driver can determine the initial position of the mover 43 when the coil in the mover 43 is powered on, so that the mover 43 and the stator magnetic steel 42 interact to generate electromagnetic thrust, the mover 43 can smoothly reciprocate linearly along the stator magnetic steel 42, the cost of cables is reduced, and errors in the signal transmission process are reduced.

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

Claims

1. A linear communication type encoder, comprising: including reading head (1) and rather than metal grating chi (2) of adaptation, reading head (1) includes casing (3), fixedly connected with signal processing board (31) in casing (3), signal processing board (31) are provided with coil unit (32), one side lateral wall of casing (3) is the opening setting, coil unit (32) are located the opening part of casing (3) and set up towards metal grating chi (2), casing (3) are provided with cable joint (33) of being connected with the driver, cable joint (33) are connected with signal processing board (31), signal processing board (31) are provided with wiring end (34) that are used for being connected with magnetic pole phase detection sensor (44), signal processing board (31) gather the magnetic pole signal of magnetic pole phase detection sensor (44) transmission and transmit to the driver through wiring end (34).

2. A linear communication type encoder according to claim 1, wherein: the signal processing board (31) is fixedly connected with an indicator light (35) used for displaying states, and the end part of the indicator light (35) extends out of the shell (3).

3. A linear communication type encoder according to claim 1, wherein: the shell (3) is provided with a mounting hole (36) convenient for fixed mounting.

4. The utility model provides an use linear electric motor of linear communication type encoder, includes base (4), slip table (41), stator magnet steel (42), active cell (43) and magnetic pole phase detection sensor (44) of relative stator magnet steel (42) motion, its characterized in that: still include the sharp communication type encoder of any one of claims 1-3, slip table (41) fixed connection in base (4), stator magnet steel (42) are along slip table (41) length direction fixed connection in slip table (41), slip table (41) slide and are connected with active cell (43), just active cell (43) are located stator magnet steel (42) directly over, reading head (1) fixed connection in active cell (43), metal grating chi (2) fixed connection is in base (4) and set up along slip table (41) length direction, metal grating chi (2) are located reading head (1) below, magnetic pole phase detection sensor (44) fixed connection in active cell (43), magnetic pole phase detection sensor (44) are located stator magnet steel (42) directly over for detect the magnetic field signal of stator magnet steel (42).

5. The linear motor using the encoder of linear communication type according to claim 4, wherein: slip table (41) slide and be connected with slide (45), runner (43) can be dismantled and connect in slide (45), reading head (1) can be dismantled and connect in slide (45) lateral wall, magnetic pole phase detection sensor (44) can be dismantled and connect in slide (45).