Structure of bidirectional self-feedback limited angle motor

Abstract

The utility model provides a bidirectional self-feedback limited angle motor structure comprising a motor unit, the motor unit comprises a stator, the center of the stator is provided with a rotor, two ends of the stator are respectively fixedly connected with a first end cover and a second end cover, two ends of a rotating shaft of the rotor are respectively provided with a first bearing and a second bearing, the first end cover is fixedly connected with the first bearing, and the second end cover is fixedly connected with the second bearing. The second end cover is fixedly connected with the second bearing; the switch unit comprises an electric brush assembly, a printed circuit board and a positioning seat; the electric brush assembly is coaxially and fixedly connected with the rotor through a flat key; the motor unit is used for providing conversion power for switching of the switch unit and providing output torque outwards. The switch unit is used for on-off switching of a switch under different rotor angles to realize feedback of an angle in-place signal of the angle motor; by designing the coverage angle of the copper coating on the printed circuit board, the signal feedback design of different rotor in-place angles is completed, and the requirements of different limited angle motors for feedback angle changes are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of angle motor, concretely relates to a structure of bidirectional self feedback limited angle motor. BACKGROUND

[0002] At present, the commonly used limited angle motor is mostly used as a power source to drive the actuating mechanism to rotate within a certain angle range, and cannot directly feedback whether the rotor rotates to a specific angle.

[0003] In order to detect whether the rotor rotates to a specific angle position, the Chinese patent with publication number CN 104405709A discloses a two-stage spool type electro-hydraulic servo valve directly driven by a limited angle torque motor, which monitors the position of the transmission shaft in real time through the position sensor installed on the transmission shaft, and transmits the position back to the controller in the form of feedback information. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, the utility model provides a structure of bidirectional self feedback limited angle motor.

[0005] The utility model is realized through the following technical schemes.

[0006] The utility model provides a structure of bidirectional self feedback limited angle motor, which comprises:

[0007] A motor unit, the motor unit comprises a stator, the stator is provided with a rotor in the center, the both ends of the stator are fixedly connected with a first end cover and a second end cover respectively, the both ends of the rotating shaft of the rotor are provided with a first bearing and a second bearing respectively, the first end cover is fixedly connected with the first bearing, and the second end cover is fixedly connected with the second bearing.

[0008] A switch unit, the switch unit is arranged in the motor unit, and the switch unit comprises a brush assembly, a printed circuit board and a positioning seat, the printed circuit board is fixedly connected with the positioning seat, the positioning seat is fixedly connected with the second end cover, and the brush assembly is fixedly connected with the rotor coaxially through a key.

[0009] The brush assembly comprises an insulating seat, a brush E and a brush S, the brush E and the brush S are fixedly arranged on the end face of the insulating seat in a central symmetrical manner, the brush E and the brush S both comprise a brush rod seat and two strip-shaped contact angles connected with the brush rod seat, and the brush rod seat is fixedly connected with the insulating seat through screws.

[0010] The same end face of the printed circuit board is provided with a square copper cladding E and a square copper cladding S in a spaced manner, and a circular copper cladding ES is further arranged on the middle part of the same end face.

[0011] The printed circuit board is hollow cylindrical, and two symmetrical square protrusions II are arranged on the outer side of the printed circuit board.

[0012] The positioning seat is hollow cylindrical, and two symmetrical square grooves are arranged on the end face of the positioning seat, and screw holes are arranged on the bottom of the square grooves.

[0013] The brush assembly is hollow cylindrical, and two superimposed ring-shaped protrusions with different diameters are arranged in the middle, and square grooves I are arranged on the inner side of the ring-shaped protrusions.

[0014] The flat key 3 is fixedly connected with the rotating shaft through the square grooves I.

[0015] The end face of the first end cover is provided with an angle-rotatable limiting groove.

[0016] The magnetic yoke of the rotor is provided with a limiting pin which is pressed and assembled through interference.

[0017] The other end of the limiting pin extends into the limiting groove.

[0018] The beneficial effect of the utility model lies in that: provide a two-way self-feedback limited rotation angle motor structure, realize the feedback of the limited rotation angle motor to the signal at the initial angle and the terminal angle by the switch unit formed by 2 switches. The switch contact piece adopts the brush structure with elasticity, which can not only ensure the reliable contact between the brush and the copper covering of the printed board, but also reduce the sliding damping force in the rotation process of the motor, so as to improve the output torque of the limited rotation angle motor. By adjusting the size of the contact piece and the coverage range of the copper covering layer of the printed board, the design of different switch conduction angles can be realized, and the demand of the feedback of the signal to the position in different angle ranges of the limited rotation angle motor can be met. The utility model can not only ensure the large torque and fast response of the limited rotation angle motor, but also ensure the fast and accurate position feedback information. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall structure diagram of the utility model;

[0020] Figure 2 It is the motor unit diagram of the utility model;

[0021] Figure 3 It is the switch unit explosion diagram of the utility model;

[0022] Figure 4 It is the brush assembly structure diagram of the utility model;

[0023] Figure 5 It is the printed circuit board structure diagram of the utility model;

[0024] Figure 6 It is the S switch conduction schematic diagram of the utility model;

[0025] Figure 7 is the E switch conduction schematic diagram of the utility model;

[0026] In the figure: 1-motor unit, 2-switch unit, 3-flats, 4-stator, 5-first end cover, 6-rotor, 7-second end cover, 8-second bearing, 9-first bearing, 10-brush assembly, 11-printed circuit board, 12-positioning seat, 13-insulating seat, 14-brush E, 15-brush S, 16-copper cladding E, 17-copper cladding S, 18-copper cladding ES, 20-limiting pin, 21-brush rod seat, 22-contact angle, 41-stator core, 42-stator housing, 61-rotating shaft, 62-magnetic yoke, 63-permanent magnet, 101-circular ring-shaped protrusion, 102-square groove I, 111-square protrusion, 121-square groove II. DETAILED DESCRIPTION

[0027] The technical scheme of the utility model is further described below, but the scope of protection is not limited to the description.

[0028] EMBODIMENT

[0029] Referring to Figures 1 to 7 A structure of a bidirectional self-feedback limited rotation angle motor, comprising a motor unit 1, the motor unit 1 is preferably a permanent magnet type inner rotor limited rotation angle motor, the motor unit 1 comprises a stator 4, the stator 4 is provided with a rotor 6 in the center, and the stator 4 is fixedly connected with a first end cover 5 and a second end cover 7 at both ends respectively; the rotating shaft 61 of the rotor 6 is provided with a first bearing 9 and a second bearing 8 at both ends respectively, the first end cover 5 is fixedly connected with the first bearing 9, and the first bearing 9 is press-fitted on the first end cover 5, the second end cover 7 is fixedly connected with the second bearing 8, and the second bearing 8 is press-fitted on the second end cover 7, which can guarantee the stable operation of the rotor 6 and prolong the service life of the bearing 61; the first bearing 9 and the second bearing 8 are used for the rotary support of the rotating shaft 61, can reduce friction, make the rotation of the rotating shaft 61 more smooth, and reduce energy consumption; one end of the rotating shaft 61 extends out of the first end cover 5, and the other end extends out of the second end cover 7, and the extending part is used for being connected with the outside; the stator 4 comprises a stator core 41 and a stator housing 42, and the rotor 6 comprises a rotating shaft 61, a magnetic yoke 62 and a permanent magnet 63.

[0030] The switch unit 2 is arranged inside the motor unit 1, and the switch unit 2 comprises a brush assembly 10, a printed circuit board 11 and a positioning seat 12, the printed circuit board 11 is fixedly connected with the positioning seat 12, the printed circuit board 11 is a hollow cylinder, and two symmetrical square protrusions 111 are arranged on the outer side of the printed circuit board 11, and screw holes are arranged on the square protrusions 111; the positioning seat 12 is also a hollow cylinder, and two symmetrical square grooves II 121 are arranged on the end face of the positioning seat 12, and screw holes are arranged on the bottom of the square grooves 121; the square protrusions 111 of the printed circuit board 11 are connected with the square grooves II of the positioning seat 12 in a matched mode, and are fixedly connected through the screw holes, so that the connection between the printed circuit board 11 and the positioning seat 12 is more stable; the positioning seat 12 is fixedly connected with the second end cover 7, so that the printed circuit board 11 and the positioning seat 12 do not rotate with the rotor 6, the contact between the printed circuit board 11 and the brush assembly 10 is more stable, and accurate rotor position feedback information is obtained; the brush assembly 10 is coaxially fixedly connected with the rotor 6 through a key 3, specifically, the brush assembly 10 is a hollow cylinder, two superimposed ring-shaped protrusions 101 with different diameters are arranged in the middle, square grooves I 102 are arranged on the inner side of the ring-shaped protrusions 101, and the key 3 is fixedly connected with the rotating shaft 61 through the square grooves I 102; the key 3 is used to connect the brush assembly 10 and the rotating shaft 61, so that the rotor 6 drives the brush assembly 10 to rotate synchronously under the electromagnetic force, high positioning accuracy can be achieved, and the brush assembly 10 is convenient to disassemble.

[0031] The brush assembly 10 comprises an insulating seat 13, an electric brush E 14 and an electric brush S 15; the electric brush E 14 and the electric brush S 15 are fixedly arranged on the end face of the insulating seat 13 in a central symmetrical mode; the electric brush E 14 and the electric brush S 15 both comprise a brush rod seat 21 and two long strip-shaped contact angles 22 connected with the brush rod seat 21, and the other end of the contact angle 22 not connected with the brush rod seat 21 is upwardly tilted. The brush rod seat 21 is fixedly connected with the insulating seat 13 through a screw; when the brush assembly 10 rotates, the electric brush E 14 and the electric brush S 15 rotate synchronously.

[0032] The same end face of the printed circuit board 11 is provided with a square copper cladding E 16 and a square copper cladding S 17 in a spaced mode, and a ring-shaped copper cladding ES 18 is further arranged in the middle of the same end face.

[0033] Specifically, when the rotor 6 rotates to the initial angle position, the raised ends of the two contact feet 22 of the brush S15 are respectively in contact with the copper coating S17 and the copper coating ES18, the switch S forms a path, and the raised end of the contact foot 22 of the brush E14 is disconnected with the copper coating E16, the switch E forms an open circuit, and thus the S switch externally transmits the feedback information of the rotor to the initial angle; when rotating to the end angle position, the raised ends of the two contact feet 22 of the brush S15 are respectively disconnected with the copper coating S17, the switch S forms an open circuit, and the raised end of the contact foot of the brush E14 is in contact with the copper coating E16 and the copper coating ES18, the switch E forms a path, and thus the E switch externally transmits the feedback information of the rotor to the initial angle.

[0034] The end face of the first end cover 5 is provided with an angle rotatable limiting groove 19, and specifically, the limiting groove 19 can be set to rotate at a specific angle as required, and the specific angle range of the embodiment is 0°-100°.

[0035] The magnetic yoke 62 of the rotor 6 is provided with a limiting pin 20 which is pressed and assembled by interference.

[0036] The other end of the limiting pin 20 extends into the limiting groove 19.

[0037] Specifically, when the stator 4 is energized, the rotor 6 rotates under the driving of electromagnetic force and rotates to one end of the limiting groove 19, and after the stator 4 is reversely energized, the rotor 6 rotates to the other end under the driving of reverse electromagnetic force, so as to realize the purpose of back and forth rotation of limited rotation angle.

[0038] The working principle of the utility model is: the copper coating E16, the copper coating S17 and the copper coating ES18 are arranged on the printed circuit board 11, and the printed circuit board 11 is fixedly installed on the end cover 27. When the rotor rotates to the initial angle 0°-20° position, the two contact feet 22 of the brush S15 are respectively in contact with the copper coating S17 and the copper coating ES18, the switch S forms a path, and the contact foot of the brush E14 is disconnected with the copper coating E16, the switch E forms an open circuit, and thus the S switch externally transmits the feedback information of the rotor to the initial angle 0°-20°; when rotating to the end angle 90°-100° position, the two contact feet of the brush S15 are respectively disconnected with the copper coating S17, the switch S forms an open circuit, and the contact foot of the brush E14 is in contact with the copper coating E16 and the copper coating ES18, the switch E forms a path, and thus the E switch externally transmits the feedback information of the rotor to the end angle 90°-100°.

[0039] The signal feedback design principle of different conduction angles: in the product design process, the copper coating laying angle of the printed circuit board 11 and the brush E14 and the brush S15 can be adjusted to meet the signal feedback of the limited rotation angle motor at different angles.

[0040] The utility model discloses a limited angle motor is provided with the brush assembly 10, and the brush assembly 10 is integrated with the motor rotor 6, and the brush assembly 10 is connected with the switch unit 2, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit 1, and the switch unit 2 is connected with the motor unit

Claims

1. A structure for a bidirectional self-feedback finite angle motor, characterized in that, It includes: The motor unit (1) includes a stator (4) with a rotor (6) in the center, the stator (4) is fixedly connected with the first end cover (5) and the second end cover (7) at both ends respectively, the rotating shaft (61) of the rotor (6) is provided with the first bearing (9) and the second bearing (8) at both ends respectively, the first end cover (5) is fixedly connected with the first bearing (9), and the second end cover (7) is fixedly connected with the second bearing (8); The switch unit (2) is arranged in the motor unit (1), and the switch unit (2) includes a brush assembly (10), a printed circuit board (11) and a positioning seat (12), the printed circuit board (11) is fixedly connected with the positioning seat (12), the positioning seat (12) is fixedly connected with the second end cover (7), and the brush assembly (10) is coaxially fixedly connected with the rotor (6) through a flat key (3).

2. The structure of a bidirectional self-feedback limited rotation angle motor according to claim 1, characterized in that: The brush assembly (10) includes an insulating seat (13), a brush E (14) and a brush S (15); the brush E (14) and the brush S (15) are fixedly arranged on the end face of the insulating seat (13) in a central symmetric manner; the brush E (14) and the brush S (15) each include a brush rod seat (21) and two strip-shaped contact angles (22) connected with the brush rod seat (21); the brush rod seat (21) is fixedly connected with the insulating seat (13) through a screw.

3. The structure of a bidirectional self-feedback limited rotation angle motor according to claim 1, characterized in that: The same end face of the printed circuit board (11) is provided with a square copper cladding E (16) and a square copper cladding S (17) in a spaced manner, and a circular ring-shaped copper cladding ES (18) is further arranged on the middle part of the same end face.

4. The structure of a bidirectional self-feedback limited rotation angle motor according to claim 1, characterized in that: The printed circuit board (11) is a hollow cylinder, and two symmetrical square protrusions (111) are arranged on the outer side of the printed circuit board (11), and screw holes are arranged on the square protrusions (111).

5. The structure of a bidirectional self-feedback limited rotation angle motor according to claim 1, characterized in that: The positioning seat (12) is a hollow cylinder, and two symmetrical square grooves II (121) are arranged on one end face of the positioning seat (12), and screw holes are arranged on the bottom of the square grooves II (121).

6. The structure of a bidirectional self-feedback limited rotation angle motor according to claim 1, characterized in that: The brush assembly (10) is a hollow cylinder, and two superimposed circular ring-shaped protrusions (101) with different diameters are arranged in the middle part, and square grooves I (102) are arranged on the inner side of the circular ring-shaped protrusions (101).

7. The structure of a bidirectional self-feedback limited rotation angle motor according to claim 1 or 6, characterized in that: The flat key (3) is fixedly connected with the rotating shaft (61) through the square grooves I (102).

8. The structure of a bidirectional self-feedback limited rotation angle motor according to claim 1, characterized in that: An angle-rotatable limiting groove (19) is arranged on the end face of the first end cover (5).

9. The structure of a bidirectional self-feedback limited rotation angle motor according to claim 1, characterized in that: A limiting pin (20) is arranged on the magnetic yoke (62) of the rotor (6) through interference press fitting.

10. The structure of a bidirectional self-feedback limited rotation angle motor according to claim 9, characterized in that: The other end of the limiting pin (20) extends into the limiting groove (19).

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