JPH0662761U - Power seat motor - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a power seat motor in which a motor yoke can be easily attached to and removed from an end cover and can be securely fixed when attached. [Structure] An end cover 5 is provided with a plurality of grooves 5b which are formed in a continuous concave shape from one side along the cylinder direction of the motor yoke 2 and have a motor yoke engaging surface 5b1 formed at an end thereof. At the same time, the motor yoke 2 has a tongue shape in which the periphery is cut off leaving one end and the end cover 5 is formed.
Of the retaining tongue 2a that is irremovably locked in the groove 5b with respect to the motor yoke locking surface 5b1 by bending the groove 5b into the groove 5b.
Power seat motor 1 provided with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a power seat motor used to drive a seat in a power seat device.

[0002]

[Prior art]

 Conventionally, as a power seat motor for driving a seat in a power seat device, one side of a cylindrical motor yoke accommodating an armature is fixed to the other side of an end cover made of a resin material. , One side of the end cover is attached to the power transmission mechanism. When the armature is energized, the armature and the armature shaft provided in this armature rotate, and the rotational power of the armature shaft is transmitted to the power transmission mechanism to drive the seat. One side of the motor yoke is fixed by covering the other side of the end cover and then caulking the entire circumference of the end cover. In addition, there are some which use screws for fixing the motor yoke and the end cover.

[0003]

[Problems to be solved by the device]

 In the above-described conventional power seat motor, one side of the motor yoke is fixed by covering the other side of the end cover by caulking around the entire circumference of the end cover. When it is necessary to remove the motor yoke from the end cover due to an internal defect, the motor yoke can be easily removed from the end cover because the motor yoke is crimped around the entire circumference of the end cover. However, if the motor yoke is forcibly removed from the end cover by force, the resin end cover may be deformed or damaged. In addition, it is possible to easily remove those that are fixed with screws, but there is a problem that it may be disadvantageous in terms of cost due to the large number of parts, and it is an object to solve the above problems. It was.

[0004]

[The purpose of the device]

 The power seat motor according to the present invention is intended to provide a power seat motor having a structure in which the motor yoke can be easily attached to and removed from the end cover and can be securely fixed when attached. There is.

[0005]

[Constitution of device]

[0006]

[Means for Solving the Problems]

 In the power seat motor according to the present invention, the end cover is provided with a plurality of grooves having a concave shape continuous from one side along the cylinder direction of the motor yoke and forming a motor yoke locking surface at the end. In addition, the motor yoke has a tongue shape with its one side left to be cut away and is bent in the groove of the end cover so as to be irremovably locked in the groove to the motor yoke locking surface. The present invention is characterized in that a retaining tongue is provided. In the embodiment adopted as necessary, the motor yoke locking surface is formed in an inclined shape from the motor yoke side toward the centripetal direction of the end cover. The angle of inclination is set to be larger than the bending angle of the retaining tongue, and in another embodiment adopted as needed, a rectangular shape is provided on one side of the motor yoke. Together provided notches, on the other side of the end cover, the motor yoke once stop portion stops rotating relative to the motor yoke in a state of being inserted into the cutout is provided.

[0007]

[Function of the device]

 In the power seat motor according to the present invention, when the retaining tongue provided on the motor yoke is bent into the groove provided in the end cover, the retaining tongue disengages from the end cover in the groove. The end cover is permanently attached to the motor yoke because the end cover is locked in the direction of the motor yoke. Since the groove of the end cover is a concave shape that is continuous from one side along the cylinder direction of the motor yoke, if a removal jig is inserted and pressed into the groove from one side, the retaining tongue The bending of the motor yoke is released, so that the motor yoke is unlocked from the end cover.

[0008]

【Example】

 1 to 6 show an embodiment of a power seat motor according to the present invention.

In the illustrated power seat motor 1, an armature 3 is housed in a motor yoke 2 having an oval cylindrical shape, and one bearing 4 is provided at a central portion on one side of the motor yoke 2. The end cover 5 is attached, and the other end of the motor yoke 2 is attached with an end cap 7 having the other bearing 6 in the central portion. The end cover 5 is made of resin.

On one side of the motor yoke 2, there is a retaining tongue 2a that is cut out in a U-shape around the edge 2c on one side of the motor yoke 2 slightly from the edge 2c of the opening portion. Four locations are provided at symmetrical positions separated from each other. Since the retaining tongue 2a is cut out in a U shape around the motor yoke 2 except for one end edge 2c side, it is bent toward the inner peripheral side of the motor yoke 2 by being pressed from the outside. It is possible, and when bent, it projects to the inner peripheral side. Further, a notch 2b formed in a rectangular opening shape from the end edge 2c side is symmetrically provided at two locations on the oval flat surface portion on one side of the motor yoke 2.

On the other hand, the armature 3 is provided with an armature shaft 3a. One side of the armature shaft 3a is rotatably supported by the one bearing 4, and the other side of the armature shaft 3a is the other side. It is rotatably supported by bearings 6. A first output portion 3a1 cut into a rectangular groove along the radial direction of the armature shaft 3a is provided on one side of the armature shaft 3a, and a square hole shape is provided on the other side of the armature shaft 3a. The second output portion 3a2 is provided. As shown in FIG. 6, the first output portion 3a1 is connected to one power transmission mechanism 8, and the second output portion 3a2 is symmetrical to the one power transmission mechanism 8 on the extension line of the armature shaft 3a1. The other power transmission mechanism (not shown) arranged at the position is connected through the end cap 7.

On the other hand, the end cover 5 has an oval pillar shape that is the same as the oval shape of the motor yoke 2, and the motor yoke fitting convex portion 5 a formed on the other side is inserted into the motor yoke 2. It has a large size. The motor yoke fitting convex portion 5a is provided with a motor yoke detent portion 5a1 formed as a rectangular shape slightly smaller than the opening size of the cutout 2b of the motor yoke 2. By inserting the motor yoke fitting convex portion 5a of the end cover 5 inside the motor yoke 2, the motor yoke locking portion 5a1 is aligned with the cutout 2b of the motor yoke 2, so that the motor yoke 2 of the end cover 5 is fixed to the motor yoke 2. It has a function to stop rotation. Since the motor yoke locking portion 5a1 is aligned with the notch 2b of the motor yoke 2, the oval curved portion of the end cover 5 is also aligned with the oval curved portion of the motor yoke 2. The rotation of the yoke 2 is securely stopped.

Further, the outer portion of the end cover 5 has a concave shape that is continuous from one end edge 5 c side of the end cover 5 along the cylinder direction of the motor yoke 2, and has a motor yoke locking at the end portion. Grooves 5b forming the surface 5b1 are provided at a plurality of positions corresponding to the retaining tongues 2a of the motor yoke 2. As is apparent from FIG. 5, the motor yoke locking surface 5b1 is formed as being inclined leftward in the figure from the motor yoke 2 side toward the centering direction of the end cover 5, and the motor yoke locking surface 5b1 is formed. The inclination angle θ2 is set to be larger than the bending angle θ1 when the retaining tongue 2a of the motor yoke 2 is bent.

When the retaining tongue 2a of the motor yoke 2 is bent toward the inner peripheral side of the motor yoke 2 by being pressed from the outside of the motor yoke 2, the retaining tongue 2 is placed in the groove 5b. Since the protrusion 2a projects, the retaining tongue 2a is locked to the motor yoke locking surface 5b1. The retaining tongue 2a projects into the groove 5b and engages with the motor yoke retaining surface 5b1, so that the retaining tongue 2a is attached to the motor yoke retaining surface 5b1 in the direction in which the retaining tongue 2a comes off the end cover 5. The end cover 5 is permanently attached to the motor yoke 2 because it is locked. Further, since the groove 5b has a concave shape that is continuous from the one end edge side of the end cover 5 along the cylinder direction of the motor yoke 2, the motor yoke 2 that is locked to the motor yoke locking surface 5b1 in the groove 5b. The removal tool 10 such as a flat-blade screwdriver is pressed and inserted from one side of the end cover 5 to the retaining tongue 2a along the groove 5b so that the retaining surface 5b 1 of the retaining tongue 2a is fixed to the motor yoke engaging surface 5b 1. It is designed to release the lock against it. Here, since the inclination angle θ2 of the motor yoke locking surface 5b1 is set to be larger than the bending angle θ1 when the retaining tongue 2a of the motor yoke 2 is bent, It is not necessary to use a large pressing force when the jig 10 releases the locking of the retaining tongue 2a with respect to the motor yoke locking surface 5b1.

In the power seat motor 1 having such a structure, when the motor yoke 2 is attached to the end cover 5, the first output portion 3a1 of the armature shaft 3a housed in the motor yoke 2 is covered with the end cover. The motor yoke fitting convex portion 5 a of the end cover 5 is inserted inside the motor yoke 2 while passing through one bearing 4 of the motor yoke 5. At this time, the motor yoke locking portion 5a1 is inserted so as to match the notch 2b of the motor yoke 2. When the motor yoke fitting convex portion 5a of the end cover 5 is inserted inside the motor yoke 2, the motor yoke rotation preventing portion 5a1 and the notch 2b prevent rotation. Therefore, when the retaining tongue 2a is pressed from the outside of the motor yoke 2, the retaining tongue 2a is bent into the groove 5b and engages with the motor yoke engaging surface 5b1. Is permanently attached to the motor yoke 2. The pressing of the retaining tongue 2a is simply performed by pressing the tongue pieces 2a at four locations from the outside of the motor yoke 2.

After removing the end cover 5 from the motor yoke 2 after mounting the end cover 5 on the motor yoke 2, it has been found that there is a problem with the rotating parts and the like, and when removing the end cover 5 from one side of the end cover 5, By pressing and inserting the removal jig 10 along this, the engagement of the retaining tongue 2a with the motor yoke engagement surface 5b1 is released, so that the end cover 5 is removed from the motor yoke 2. I do. At this time, since the inclination angle θ2 of the motor yoke engaging surface 5b1 is set to be larger than the bending angle θ1 when the retaining tongue 2a of the motor yoke 2 is bent, it is removed. The engagement of the retaining tongue 2a with the motor yoke engagement surface 5b1 by the jig 10 is released by a small pressing force.

As shown in FIG. 6, in the power seat motor 1, one end of the end cover 7 is attached to the power transmission mechanism 8 and the end cap 7 is attached to the other power transmission mechanism side of the armature shaft 3a. The first output portion 3a1 is connected to the power input side of one power transmission mechanism 8, and the second output portion 3a2 is connected to the power input side of the other power transmission mechanism. Therefore, when the armature 3 of the power seat motor 1 is energized, the armature 3 rotates together with the armature shaft 3a, so that the rotational power of the armature shaft 3a is transmitted to one power transmission mechanism 8 and is connected to the power transmission mechanism 8. The lead screw 9 is rotated, and the lead screw 9 is moved with respect to the meshed nut member 11 to be converted into power for driving the seat. Similarly, the power for driving the seat is also transmitted through the other power transmission mechanism. Since it is converted into power, a seat (not shown) is moved.

[0018]

[Effect of device]

 As described above, since the power seat motor according to the present invention has the above-mentioned configuration, the motor yoke is fixed to the end cover by bending the retaining tab of the motor yoke into the groove of the end cover. It is easy to install and can be easily removed via the groove, so it will not deform or damage the end cover by forcing it to remove it compared to the conventional one, and it will be secure when mounted. In addition to the fact that it can be fixed easily, there is no increase in the number of parts as compared with the case where it is fixed by screws, so there is an excellent effect in terms of cost.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a power seat motor according to the present invention.

FIG. 2 is a left side view of the power seat motor shown in FIG.

FIG. 3 is a vertical sectional front view of the power seat motor shown in FIG.

FIG. 4 is an external perspective view of a mounting portion of an end cover and a motor yoke in the power seat motor shown in FIG.

5 is a cross-sectional view of a mounting portion between an end cover and a motor yoke in the power seat motor shown in FIG.

FIG. 6 is a plan view showing a state where the power seat motor shown in FIG. 1 is assembled to a seat side.

[Explanation of symbols]

 1 power seat motor 2 motor yoke 2a retaining tongue piece 5 end cover 5b groove 5b1 motor yoke locking surface

Claims (3)

[Scope of utility model registration request] 1. An armature having an armature shaft, a motor yoke having a tubular shape and accommodating the armature, the other side being attached to one side of the motor yoke, and the one side being a power transmission mechanism. A power seat motor for outputting a seat driving rotational power from the armature shaft to the power transmission mechanism by energizing the armature, the end cover being attached to the end portion of the motor yoke. A plurality of grooves having a concave shape continuous along the cylinder direction and forming a motor yoke locking surface at the end are provided at the plurality of positions, and the motor yoke has a tongue whose periphery is cut off leaving one side. It has a shape and is bent into the groove of the end cover, so that the motor yoke locking surface is A power seat motor, characterized in that it is provided with a retaining tongue that is locked so that it cannot be removed. 2. The motor yoke locking surface is formed so as to be inclined from the motor yoke side toward the centripetal direction of the end cover, and the inclination angle is set to be larger than the bending angle of the retaining tongue piece. The power seat motor according to claim 1. 3. A motor yoke detent portion which has a rectangular notch formed on one side of the motor yoke and which detents against the motor yoke in a state of being inserted into the notch on the other side of the end cover. Are provided.
The power seat motor according to any one of 1.