A rotation positioning structure for a micromotor rotor

Abstract

The present invention relates to a rotation positioning structure of a micro-motor rotor, comprising a frame, a magnet and a rotating part; the frame has a forked part, and the magnet installed on the forked part surrounds the rotor pole of the inserted rotor; an open slot for sliding insertion of the rotor optical axis is arranged on the upper and lower sides of the frame, and the slot width of the open slot is slightly larger than the axial diameter of the rotor optical axis; the rotating part is installed at the junction of the forked part, and the axis center of the rotor optical axis of the inserted rotor and the axis center of the rotating part have a slight eccentricity, and the inserted rotor is attracted by the magnet and moves forward and touches the rotating part to form a structure in which the rotating body of the rotating part rotates and the inserted rotor rotates automatically; when the rotor optical axis is inserted to the abutting end of the open slot, the edge of the rotating body of the rotating part and the edges of the two rotor poles of the rotor are clamped and limited to form a structure for positioning the rotor. It has the advantages of simple structure, automatic positioning and high working efficiency.

Description

Technical Field

[0001] The invention relates to a rotation positioning structure of a micro motor rotor. Background Art

[0002] Micromotors are frequently used components in products, and the market demand is very large. The equipment for manufacturing micromotor rotors has also developed from semi-automatic to fully automatic, and the equipment also places higher requirements on the positioning of the rotor during the production process.

[0003] Most of the existing methods for rotating the rotor of a micromotor are to clamp the rotor on a rotating mechanism, and drive the rotor to rotate around the center of its own optical axis through the rotation of the mechanism. The limiting part next to the rotating mechanism is subjected to a radial force toward the optical axis of the rotor. When the rotor rotates to a certain angle and the rotor slot is aligned with the limiting part, the limiting part is inserted into the rotor slot to limit the rotation of the rotor. At this time, the sensor senses that the limiting part is inserted into the rotor slot, stops the rotation mechanism, and completes the rotation positioning of the rotor. Such a device structure has the following disadvantages: first, the rotating mechanism needs to be driven by a motor, and a sensor is required to sense the position of the limiting part, thereby increasing the equipment cost; second, it makes the structure of the machine equipment complex and the operation cumbersome; third, the working efficiency is low. Summary of the invention

[0004] The object of the present invention is to provide a rotation positioning structure for a micro-motor rotor with simple structure, automatic positioning and high working efficiency in view of the above-mentioned problems.

[0005] The objective of the present invention is achieved by comprising a frame, a magnet and a rotating member; the frame has a forked portion, and the magnet mounted on the forked portion surrounds the rotor pole of the inserted rotor; open grooves for sliding insertion of the rotor optical axis are provided on the upper and lower sides of the frame, and the groove width of the open groove is slightly larger than the axial diameter of the rotor optical axis; the rotating member is mounted at the junction of the forked portion, and the axis center of the rotor optical axis of the inserted rotor and the axis center of the rotating member have a slight eccentricity, and the inserted rotor is attracted by the magnet and moves forward and touches the rotating member to form a structure in which the rotating body of the rotating member rotates and the inserted rotor rotates automatically; when the rotor optical axis is inserted to the abutting end of the open groove, the edge of the rotating body of the rotating member and the edges of the two rotor poles of the rotor are engaged and limited to form a structure for positioning the rotor.

[0006] In the present invention, two magnets are arranged on the bifurcated part, and the two magnets are symmetrically arranged on the two branches of the bifurcated part on the left and right.

[0007] The frame of the present invention comprises a bracket and an upper side plate and a lower side plate fixed to the bracket. The opening grooves provided on the upper side plate and the lower side plate have V-shaped openings, and the rotor optical axis passes through the V-shaped openings to form an insertion structure that avoids aligning with the opening grooves.

[0008] In the present invention, the rotating part comprises a fixed shaft and a bearing, and the bearing is sleeved on the fixed shaft to form a rotating body of the rotating part.

[0009] In the present invention, the aperture of the abutting end of the open slot is slightly larger than the diameter of the rotor optical axis, thereby forming a structure in which the rotor optical axis can rotate flexibly.

[0010] The present invention does not need to use induction elements and power rotation mechanisms, the equipment is simple, and the equipment cost is saved. The entire magnetic adsorption structure is simple and easy to operate. The rotor positioning can be quickly completed by only pushing the rotor optical axis into the bracket. Therefore, the present invention can not only automatically and accurately position the rotor, but also has high positioning efficiency.

[0011] The present invention is further described with reference to the following embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0013] Figure 2 yes Figure 1 A schematic diagram of the top view of the structure of the embodiment;

[0014] Figure 3 yes Figure 1 A schematic diagram of a three-dimensional structure of components of an embodiment;

[0015] Figure 4 yes Figure 1 A schematic structural diagram of the rotor of the embodiment before positioning;

[0016] Figure 5 yes Figure 1 A schematic diagram of a force analysis structure of a rotor and a rotating member in contact with each other in an embodiment;

[0017] Figure 6 yes Figure 1 A schematic structural diagram of the embodiment after the rotor is positioned.

[0018] In the figure, 1, bracket; 2, upper side plate; 3, lower side plate; 4, magnet; 5, fixed axis; 6, bearing; 7, rotor optical axis; 8, rotor pole of the rotor; 9, fork; 10, open groove; 11, V-shaped mouth; 12, abutment end of the open groove; A, axis center of the rotor optical axis; B, axis center of the rotating part; e, eccentricity; F, rotor push-in and magnetic attraction combined force. DETAILED DESCRIPTION

[0019] Reference Figures 1 to 6The present embodiment is a rotation positioning structure of a micro-motor rotor, comprising a frame, a magnet and a rotating member; the frame comprises a frame 1 and an upper side plate 2 and a lower side plate 3 fixed to the frame, the upper side plate and the lower side plate are provided with an opening groove having a V-shaped opening 11, and the rotor optical axis passes through the V-shaped opening to form an insertion structure that does not need to align with the opening groove; the frame is roughly fork-shaped, and the two branches of the forked portion 9 of the frame are each mounted on a magnet 4; the magnets of the two branches mounted on the forked portion surround two adjacent rotor poles 8 of the inserted rotor, and the rotor of the present embodiment has three rotor poles, so the magnets of the two branches are symmetrically arranged on the left and right to form an angle of approximately 120 degrees; the upper side plate and the lower side plate are provided with an opening groove 10 for the rotor optical axis 7 to slide into, and the opening groove The slot width is slightly larger than the axial diameter of the rotor optical axis, and the aperture of the abutting end of the open slot is slightly larger than the axial diameter of the rotor optical axis, forming a structure for the flexible rotation of the rotor optical axis; the rotating member is installed at the junction of the fork portion, and the rotating member includes a fixed shaft 5 and a bearing 6, and the bearing is sleeved on the fixed shaft to form the rotating body of the rotating member; the axis A of the rotor optical axis of the inserted rotor and the axis B of the rotating member, that is, the axis of the fixed shaft, have a slight eccentricity e, and the inserted rotor is attracted by the magnet and moves forward and touches the rotating member to form a structure in which the rotating body of the rotating member rotates and the inserted rotor rotates automatically; when the rotor optical axis is inserted to the abutting end 12 of the open slot, the edge of the rotating body of the rotating member and the edges of the two rotor poles of the rotor are clamped and limited to form a structure for positioning the rotor.

[0020] The working process of this embodiment refers to Figures 4 to 6 , push the rotor into the manipulator, that is, the rotor optical axis slides along the opening grooves of the upper side plate and the lower side plate. Since the slot width of the opening groove is slightly larger than the axial diameter of the rotor optical axis, the axis center A of the rotor optical axis of the inserted rotor and the axis center B of the rotating part, that is, the axis center of the fixed axis, have a slight eccentricity e. There is thrust at the beginning of pushing. Since the rotor pole of the rotor has silicon steel sheets, the magnet installed on the fork of the bracket has a magnetic attraction to the rotor pole of the rotor. Under the action of the rotor push-in and the magnetic attraction combined force F, the inserted rotor is attracted by the magnet and moves forward and touches the bearing of the rotating part to rotate, thereby assisting the inserted rotor to rotate automatically. When the rotor optical axis is inserted to the abutting end of the opening groove, the rotor pole is just facing the magnet, the rotor slot is facing the bearing, the edge of the bearing of the rotating part and the edges of the two rotor poles of the rotor are clamped and limited, the rotor stops rotating, and the rotor is positioned.

Claims

1. A rotation positioning structure for a micromotor rotor, characterized in that: It includes a frame, a magnet and a rotating part; The frame has a forked portion (9), and a magnet (4) mounted on the forked portion surrounds a rotor pole (8) of the inserted rotor; an open slot (10) for slidingly inserting the rotor optical axis (7) is provided on the upper and lower sides of the frame, and the slot width of the open slot is slightly larger than the shaft diameter of the rotor optical axis; The rotating member is installed at the junction of the forked part, and the axis center (A) of the rotor optical axis of the inserted rotor and the axis center (B) of the rotating member have a slight eccentricity (e). The inserted rotor is attracted by the magnet and moves forward and touches the rotating member to form a structure in which the rotating body of the rotating member rotates and the inserted rotor rotates automatically; when the rotor optical axis is inserted to the abutment end (12) of the open slot, the edge of the rotating body of the rotating member and the edges of the two rotor poles of the rotor are locked and limited to form a structure for positioning the rotor.

2. The rotation positioning structure of the micromotor rotor according to claim 1, characterized in that: There are two magnets installed on the bifurcated part, and the two magnets are symmetrically arranged on the left and right of the two branches of the bifurcated part.

3. The rotation positioning structure of the micromotor rotor according to claim 1, characterized in that: The frame body comprises a bracket (1) and an upper side plate (2) and a lower side plate (3) fixed to the bracket, the opening grooves provided on the upper side plate and the lower side plate have a V-shaped opening (11), and the rotor optical axis passes through the V-shaped opening to form an insertion structure that avoids alignment with the opening groove.

4. The rotation positioning structure of the micromotor rotor according to claim 1, characterized in that: The rotating part comprises a fixed shaft (5) and a bearing (6), wherein the bearing is sleeved on the fixed shaft to form a rotating body of the rotating part.

5. The rotation positioning structure of the micromotor rotor according to claim 1, characterized in that: The aperture of the abutting end of the open slot is slightly larger than the diameter of the rotor optical axis, forming a structure for the rotation of the rotor optical axis.

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