JP4549225B2 - Actuator motor - Google Patents

Description

  The present invention relates to an actuator motor for driving an opening / closing body and a moving body, and more specifically, for example, provided on a flip-up type rear door, a side door, or a roof that is provided in a vehicle such as an automobile. The present invention relates to an actuator motor for use in an actuator that automatically opens a sliding window.

Conventionally, a door opening and closing device for opening and closing the slide door provided in the side surface of the car in the motor are known, for example, by Patent Document 1. Further, by the driving force of the gas spring and the motor, even a door opening and closing device which is adapted to open and close the back door, it is known from Patent Document 2.

Among the small motor actuator used in these door openers, there is the even incorporating the permanent magnet of annular magnetic-field in which a bottomed cylindrical in the cylindrical case. In this structure, traditional is an epoxy adhesive was applied to the outer peripheral surface of the permanent magnet, which, is inserted inside the yoke is formed in a cap shape, was fixed by an adhesive.
JP-A-11-72395 Japanese Patent Laying-Open No. 2004-175221 (see FIG. 9)

However, in the structure of a conventional motor, it has the following problems.
(A) at the time of assembly standing, first an adhesive is applied, then insert the permanent magnets, so further require three-step process that is heated and dried, the time required for assembling it becomes long.
(B) Since an adhesive is used , the work chamber is easily soiled.
(C) Odors peculiar to the adhesive are generated, and the environment in the working room is deteriorated . Therefore , sufficient ventilation is required.
(D) Since an adhesive is used, a gap is generated between the permanent magnet and the yoke, or between the permanent magnet and the rotor (armature) due to the bonding cost , and the dynamic balance of the rotor is deteriorated. .
(E) due to the poor concentricity with respect to the rotational center of the magnet inner diameter after assembly, since the process is not performed to narrow the gap between the rotor (armature) and the permanent magnet, to fully utilize the magnetic force of the permanent magnet This is an impediment to improving the performance of the motor.

In general, it is that the motor actuator is used in a vehicle such as an automobile, a high output in compact is required.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a motor for an in-vehicle actuator that solves the above-described problems in the prior art and is small and capable of high output.

According to the present invention, the above problem is solved as follows.
(1)
And a motor portion and an actuator portion, a portion of the rotation shaft of the motor unit is projected into the actuator unit, the motor unit a luer actuator motor such attached to one end of the actuator portion,
The motor part is a ring-shaped neodymium-based bonded magnet, and a permanent magnet formed by magnetizing a plurality of N poles and S poles alternately at equal intervals along the circumferential direction on the inner peripheral surface into a bottomed cylindrical shape The yoke and the inner peripheral surface of the yoke that also serves as a cylindrical case are press-fitted and fitted, and the yoke and the permanent magnet are integrated ,
The actuator part includes an annular positioning annular part fitted to the inner periphery of the yoke, and a receiving seat surface that extends from the outer periphery of the positioning annular part to the outside at a substantially right angle, and the end surface of the yoke is in contact with and positioned. provided with a bets, for attachment of the motor section, interposed between the end face and the seat face of the yoke, the O-ring to impart alignment force to the yoke, and the positioning annular section and the seat surface will be provided to the junction corner portions of,
The motor part and the actuator part are formed by bending a flange part formed by bending outward at a substantially right angle to the opening end of the yoke in the motor part at the corner part of the positioning annular part in the actuator part. The motor part and the actuator part are aligned by crushing the O-ring with a bent inner peripheral part that is bent round from the surface to the end face of the yoke, and contacting the end face collar part of the yoke and the receiving seat surface, The motor part and the actuator part are fixed.

(2) above (1) to Oite, the rotating shaft protruding into the actuator unit, provided with a worm gear which is the worm wheel and meshing in the actuator portion.

According to the present invention, the following effects can be achieved.
(A) According to the invention described in claim 1, the inner diameter dimension of the bottomed cylindrical yoke is set slightly smaller than the outer diameter dimension of the annular permanent magnet, and the permanent magnet is used with an appropriate jig. The permanent magnet can be fixed to the inside of the yoke without an adhesive and can be integrated by press-fitting into the inside of the yoke. Therefore, as compared with the conventional structure in which the adhesive is applied, the time required for assembly is shortened, and the productivity is improved. Further, it is possible to improve the environment in the work chamber by eliminating dirt and odor in the work chamber. Furthermore, there is no adhesion margin or deviation of the adhesion margin, and the concentricity and roundness of the inner diameter of the permanent magnet after assembly are remarkably improved. Further, the gap between the permanent magnet and the rotor side, and narrower than the conventional, it is possible to take out the magnetic force of the permanent magnet sufficiently, with small, allowing high output. In addition, since a neodymium-based bond permanent magnet is used as the permanent magnet, it is possible to further reduce the size and increase the output, and to improve the on-vehicle performance by downsizing.
Furthermore, the yoke that is in contact with the receiving seat surface via the O-ring receives a reaction force that acts evenly radially outward from the O-ring on the end surface, and this reaction force automatically aligns the yoke. Since it acts as a force to try, concentricity between the yoke and the actuator portion can also be obtained. Thereby, in addition to the concentricity of the permanent magnet with respect to the yoke, concentricity of the yoke and the actuator portion is also obtained, and the concentricity and roundness of the inner diameter of the permanent magnet after assembly are remarkably improved.
(C) According to the invention described in claim 2, since the worm is provided on the rotating shaft and the worm wheel in the actuator portion is meshed with the worm to constitute the speed reduction mechanism, the number of parts is reduced and the size is reduced. A vehicle-mounted actuator can be provided at low cost.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing the inside of a motor-driven actuator to which the on-vehicle actuator motor of the present invention is applied, and FIG. 2 is an exploded perspective view of the motor-driven actuator. As shown in FIG. 1, the motor-driven actuator (1) is equipped with a motor part (3) on one end side of the actuator part (2).

The actuator part (2) includes a motor end cover part (4a), a shaft receiving part (4b) continuously provided on the front side of the motor end cover part (4a) , and a lower side of the shaft receiving part (4b). the worm wheel receiving portion provided continuously and (4c), and has an actuator case body (4) made integrally provided.

Shaft receiving portion (4b) is formed in a cylindrical shape to chromatic centered through hole (5). Motor end cover portion (4a) is formed in a substantially cap shape, the center thereof, and the shaft receiving portion a through hole is extended from (4b) (5) provided. On the rear end surface of the motor end cover (4a), as shown in FIG. 3, an annular positioning annular portion (6) protruding rearward and outward from the base portion of the positioning annular portion (6). substantially perpendicularly extended the seat surface (7) are provided.

Worm wheel receiving portion (4c) is formed in a shape outline cap, in its center, a through hole extending through the left and right (8), bearing-receiving of the through hole (8) to enclose the Hare cup Part (9) is formed. The bearing receiving portion (9) within Ru Tei is attached bearing (10). An output shaft (11) is rotatably attached to the bearing (10) through the bearing (10) and the through hole (8). A worm wheel (12) is attached to one end of the output shaft (11) in a state of being disposed in the worm wheel receiving portion (4c) so as to be integrally rotatable. Although not shown, the other end of the output shaft (11) is protruded to the outside of the actuator case body (4) through the through hole (8). On the other end side, a power transmission gear, a pulley or the like is attached so as to be integrally rotatable.

The motor unit (3) includes an armature (14) as a rotor having a rotating shaft (13), and a stator (15) disposed outside the armature (14). The rotating shaft (13) passes through the through hole (5) of the shaft receiving portion (4b) in the actuator case body (4), and the left and right bearings (16) attached to the through hole (5) ( 16), the actuator case main body (4) is rotatably supported. A worm gear (13a) meshed with the worm wheel (12) is provided at an intermediate portion of the rotary shaft (13).

  The armature (14) is fixed on the rotating shaft (13). The stator (15) is composed of a yoke (17) that also serves as a bottomed cylindrical motor case, and a field permanent magnet (18) disposed outside the armature (14) in the yoke (17). It is configured.

The inner diameter dimension of the opening end of the yoke (17) is substantially equal to the outer diameter dimension of the positioning annular portion (6) of the motor end lid (4a), and the positioning annular portion (6) can be received at the opening end. Yes. A part of the opening end is bent at a substantially right angle toward the outer side, and a collar portion (19) is provided on the entire circumference by this bending. As shown in FIG. 2, the flange part (19) is provided with a mounting hole (20) corresponding to the screw hole (21) provided in the receiving seat surface (7) of the motor end cover part (4a). Oh Ru Te.

The permanent magnet (18) is a neodymium bond magnet. The neodymium-based bonded magnet is made, for example, by kneading Nd-Fe-B (neodymium-iron-boron) with a binder resin, and the annular inner peripheral surface has a circumferential direction. A plurality of N poles and S poles are alternately magnetized at equal intervals. This neodymium-based bonded magnet is widely known for its excellent magnetic performance, and by using it as a permanent magnet for field (18), it is thin and small. Also, high torque can be obtained.

The outer diameter of the permanent magnet (18) is slightly larger than the inner diameter of the magnet mounting surface (17a) in the yoke (17) to which the permanent magnet (18) is mounted . Permanent magnets (18), without the use of adhesives, the yoke (17) and the permanent magnet (18) is placed in a high temperature atmosphere, by using an appropriate jig magnet attachment surface of the yoke (17) (17a ) And press-fitting together to integrate them. In such a mounting structure, the time required for assembling is shortened as compared with the conventional structure in which adhesion is applied. Also, no dirt or odor is generated in the working chamber. In addition, since there is no adhesion or deviation of the adhesion margin, the concentricity and roundness of the inner diameter of the permanent magnet after assembly are remarkably good, and the gap between the permanent magnet (18) and the armature (14) is reduced. It is possible to increase the output.

An armature core (22) fixed to the rotary shaft (13) is disposed inside the permanent magnet (18). A commutator (23) is disposed at a position on the right side of the armature core (22) in FIGS. 1 and 2, and a power supply brush (24) is equally disposed around the commutator (23).

The armature core (22) is formed, for example, by laminating silicon steel plates, and as shown in FIG. 2, ten slots (25) extending in the axial direction of the rotating shaft (13) are arranged along the circumferential direction. A substantially T-shaped tooth portion, that is, 10 teeth (26), which are equally divided by the slot (25), is provided. The teeth (26), by winding a wire, a coil (27) is formed.

The commutator (23) includes ten commutator pieces (28) fixed to the rotating shaft (13). Each commutator segment (28) is arranged in the circumferential direction are insulated from each other, the outer peripheral surface thereof is in sliding contact with the power supply brushes (24).

Power supply brushes (24) via the commutator segments (28), supplies a current from the outside to the armature (14), the bottom surface of the motor end cover portion (4a) with screws (30) It is disposed on the circuit board (29) to which it is attached. Incidentally, in the center of the circuit board (29), the through-hole rotating shaft (13) penetrates (29a) is provided.

Next, an example of a procedure for incorporating the motor unit (3) into the actuator unit (2) will be described. First, the motor part (3) is assembled with the worm wheel (12) not attached. Prior to the integration, the circuit board (29) which arranged power supply brushes (24), the Tomo idea attached with screws (30) on the bottom surface of the motor end cover portion (4a), the motor end cover portion ( The O-ring (31) is mounted on the positioning annular portion (6) of 4a), and this O-ring (31) is joined at the corner portion (7a) which becomes the boundary between the positioning annular portion (6) and the seating surface (7). Keep it positioned. The O-ring (31) is elastic, for example, NBR (nitrile-butadiene-rubber) and has a substantially circular cross section.

  Next, the rotating shaft (13) to which the bearing plate (32), the steel ball (33), and the armature (14) are attached is sequentially accommodated in the yoke (17) to which the permanent magnet (18) is attached.

Subsequently, the rotating shaft (13) is inserted into the through hole (5) of the shaft receiving portion (4b) through the circuit board (29) and the motor end cover portion (4a), and the commutator piece (28) is inserted. in together and is subjected to contact with the power supply brushes (24) rotatably supported by a bearing (16) one end of the rotating shaft through hole (5) in (13). Further, the flange (19) of the yoke (17) is pressed against the receiving seat surface (7) of the motor end cover (4a), and the mounting screw (34) is passed through the mounting hole (20) to the screw hole (21). The yoke (17) is fixed to the motor end cover (4a) with screws.

When the flange portion of the yaw click (17) (19) is pressed against the seat surface of the motor end cover portion (4a) (7), is positioned in the junction corner portions of the motor end cover portion (4a) (7a) state O-ring (31) which are, bent inner peripheral portion of the yoke (17) connected to the flange portion (19) (17b) is abutting, as shown in FIG. 3, in which crushed O-ring (31) Then, the collar part (19) is pressed against the receiving surface (7). When the O-ring (31) is crushed, a reaction force acting radially radially from the O-ring (31) side acts on the bent inner peripheral portion (17b) of the yoke (17). The reaction force acts as a force for automatically aligning the yoke (17), and concentricity between the yoke (17) and the actuator portion (2) is obtained. O-ring (31) shown by a one-dot chain line in FIG. 3, before the collapse state, O-ring (31) indicated by a solid line, the collapsed state, respectively.

Further, the motor part (3) after the Attach to the actuator case body (4), the front side of the actuator case body (4) (the right side in FIG. 1), a thrust force of the rotating shaft (13) steel balls (35) kicking Installing a bracket (36). Thereby, the attachment of the motor unit (3) is completed.

  Subsequently, the assembly is completed when the worm wheel (12) attached to the output shaft (11) together with the bearing (10) is engaged with the worm gear (13a) and disposed in the worm wheel receiving portion (4c). . The worm gear (13a) and the worm wheel (12) function as a reduction gear.

Therefore, according to the structure of the present invention, the yoke (17) and the permanent magnet (18) are fixed by press-fitting without using an adhesive. Compared with, the time required for assembly is shortened, and the productivity is improved. Further, it is possible to improve the environment in the work chamber by eliminating dirt and odor in the work chamber. Furthermore, adhesion margins and adhesion margins polarized Riganakunari, the concentricity and roundness of the permanent magnet the inside diameter of the assembled significantly improved. In addition, the gap between the permanent magnet (18) and the armature (14) side can be made narrower than the conventional one, and it is small and high output can be achieved. Moreover, since a neodymium bond permanent magnet is used for the permanent magnet (18), it is possible to further reduce the size and increase the output. Further , by using the O-ring (31), the motor part (3) having excellent concentricity can be obtained, and the worm gear (for the speed reducer) is provided on the rotating shaft (13) of the motor part (3). by providing the 13a), the number of components Ri reduced, it is possible to provide a vehicle-mounted actuator miniaturized.

  It should be noted that the present invention can be variously modified and changed within the scope of the present invention without departing from the gist of the present invention.

It is sectional drawing which shows the inside of the motor drive actuator to which the motor for vehicle-mounted actuators of this invention is applied. It is a disassembled perspective view of an actuator same as the above. It is a principal part expanded sectional view of an actuator same as the above.

(1) Motor-driven actuator
(2) Actuator section
(3) Motor part
(4) Actuator case body
(4a) Motor end cover
(4b) Shaft receiving part
(4c) Warm wheel receiving part
(5) Through hole
(6) Positioning ring
(7) Receiving seat
(7a) Joint corner
(8) Through hole
(9) Bearing receiving part
(10) Bearing
(11) Output shaft
(12) Warm wheel
(13) Rotating shaft
(13a) Worm gear
(14) Armature
(15) Stator
(16) Bearing
(17) Yoke (motor case)
(17a) Magnet mounting surface
(17b) Folding inner circumference
(18) Permanent magnet (field magnet)
(19) Buttocks
(20) Mounting hole
(21) Screw hole
(22) Armature core
(23) Commutator
(24) Power supply brush
(25) Slot
(26) Teeth
(27) Coil
(28) Commutator piece
(29) Circuit board
(29a) Through hole
(30) Screw
(31) O-ring
(32) Bearing plate
(33) Steel ball
(34) Screw
(35) Steel ball
(36) Bracket

Claims (2)

And a motor portion and an actuator portion, a portion of the rotation shaft of the motor unit is projected into the actuator unit, the motor unit a luer actuator motor such attached to one end of the actuator portion,
The motor part is a ring-shaped neodymium-based bonded magnet, and a permanent magnet formed by magnetizing a plurality of N poles and S poles alternately at equal intervals along the circumferential direction on the inner peripheral surface into a bottomed cylindrical shape The yoke and the inner peripheral surface of the yoke that also serves as a cylindrical case are press-fitted and fitted, and the yoke and the permanent magnet are integrated ,
The actuator unit includes a positioning annular portion in which the annular fitted to the inner periphery of the yoke, spread substantially perpendicular outward from the outer periphery of the positioning ring section, seat surface the end face of the yoke is abutting positioning provided with a bets, for attachment of the motor section, interposed between the end face and the seat face of the yoke, the O-ring to impart alignment force to the yoke, and the positioning annular section and the seat surface At the corner of the joint ,
The motor part and the actuator part are formed by bending a flange part formed by bending outward at a substantially right angle to the opening end of the yoke in the motor part at the corner part of the positioning annular part in the actuator part. The motor part and the actuator part are aligned by crushing the O-ring with a bent inner peripheral part that is bent round from the surface to the end face of the yoke, and contacting the end face collar part of the yoke and the receiving seat surface, An actuator motor, wherein the motor unit and the actuator unit are fixed . A rotating shaft which projects into the actuator, the actuator motor according to claim 1, characterized in that a worm gear is a worm wheel meshed in the actuator portion.

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