JPH0646201Y2 - Motor antenna thrust plate mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a thrust plate mounting structure for a power antenna motor mounted on a vehicle such as a private vehicle, a bus, a truck, or the like.

[Problems to be Solved by Prior Art and Invention] In general, some vehicles are equipped with a power antenna that automatically expands and contracts the antenna by driving a motor. In such a device, a motor is integrally provided in a casing, and a worm gear formed on the motor shaft of the motor is meshed with a worm wheel installed in the casing to output, but the tip of the motor shaft is It is necessary to cover the thrust plate so as to receive the load in the thrust direction.

Therefore, the thrust plate is attached to the casing. Conventionally, the thrust plate is attached by forming a groove on the surface side of the casing on which the worm wheel is attached and press-fitting the thrust plate into the groove. .
However, in this case, the thrust plate is incorporated with the surface to which the worm wheel is attached being open, so there is a risk that the thrust plate will come out of the groove when the casing is thermally deformed or violently vibrates. There is a problem that the grease applied to the sliding portion where the tip of the motor shaft abuts and slides out of the groove due to heat generation. In addition, the metal abrasion powder of the thrust plate and motor shaft scatters from the groove and adheres to the members such as the drum and gear, which impairs smooth operation such as defective sliding and accelerated abnormal wear of these members and reduces durability. There are problems such as coming.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention was devised with the object of providing a thrust plate mounting structure for a power antenna motor that can eliminate these drawbacks. At the drive chamber side of the casing that is partitioned by the partition surface, a power-driven mechanism for transmitting power from the motor shaft to the drive gear is installed, and at the electrical chamber side, an electric motor that detects the rotation speed of the motor shaft is installed. In a power antenna motor incorporating components, a concave hole is formed in the partition surface so that the tip of the motor shaft is recessed in the thrust direction so that the electric chamber side is opened, and the thrust plate is electrically connected through the opening. The contact plate is configured so that it can be inserted and incorporated from the room side, and the opening is detachably fixed to the electric room side to form the electric component. It is characterized in that it is closed by a lid formed on the holder.

The present invention, with this configuration, ensures that the thrust plate is prevented from coming off, and that grease and metal abrasion powder do not flow out or scatter.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, 1 is a motor for a power antenna,
Although the motor 1 is integrally attached to a casing 2 in which the present embodiment is implemented, the casing 2 is divided into a drive chamber 2b and an electric chamber 2c by a partition surface 2a. In the drive chamber 2b, a worm wheel 3 that always meshes with a worm gear 1b provided on a motor shaft 1a of the motor 1 described later, an intermediate gear 4 that constantly meshes with the worm wheel 3, and an intermediate gear 4 through a clutch mechanism 5 An operation gear 6 that is interlocked and connected, and a drive cord 8 that is meshed with the operation gear 6 and that is sent out from the code case 7 and is sent back by the forward and reverse rotation of the operation gear 6 accompanying the motor drive The antenna main body 9 to which the tip of the drive cord 8 is connected is expanded and contracted by feeding and returning the drive cord 8.

On the other hand, the boss portion 3a of the worm wheel 3 faces the electric chamber 2c side, and the pin 10 is provided on the boss portion 3a so as to rotate integrally with the worm wheel 3. 11 is a detection wheel rotatably provided on the electric chamber 2c side,
The detection wheel 11 is adapted to intermittently mesh with the pin 10 to rotate, and the detection wheel 11 is provided with a detection plate 11a. On the other hand, 12 is a plate holder provided with a contact plate 12a that contacts the detection plate 11a, and the plate holder 12 is integrally fixed to the electric chamber 2c side by a screw (not shown). It is configured. The contact plate 12 associated with the rotation of the detection wheel 11 linked to the driving of the motor 1
The rotation of the motor 1 is detected by the change in the contact of a with the detection plate 11a.

Reference numeral 13 denotes a thrust plate embodying the present invention. The thrust plate 13 is incorporated in the casing 2 to receive the load in the thrust direction at the tip of the motor shaft 1a. It is incorporated. That is, the protruding portion at the tip of the motor shaft 1a on the partition surface 2a is
A recessed hole 2d is provided, and the electric chamber 2c is included in the recessed hole 2d.
The side surface is further open, and the electric room is opened through this opening 2e.
The thrust plate 13 can be assembled in the recessed hole 2d from the 2c side, and the tip of the motor shaft 1a can be visually observed. That is, the thrust plate 13 is incorporated in the recessed hole 2d which is open on the electric chamber 2c side and closed on the drive chamber 2b side and the left and right sides thereof. Further, the opening 2e is configured to be closed by a lid portion 12b provided integrally with the plate holder 12.

In the embodiment of the present invention configured as described above, the motor shaft 1a receives the load in the thrust direction by the thrust plate 13, but the thrust plate 13 is
Just press-fit and assemble from the drive chamber 2b side as in the past.
The drive chamber 2b side is not in an open state, but is incorporated in the recessed hole 2d in a state in which four sides around the axis are surrounded. As a result, the thrust plate 13 is not allowed to fall off, and it is possible to reliably prevent the grease from flowing out and the worn metal powder from being dispersed.

As described above, in this embodiment, the thrust plate 13 is incorporated in the recessed holes 2d surrounded by the four sides to eliminate the problems such as the drop-off which the conventional one has. The plate holder 12 can be easily inserted and assembled from the opening 2e opened when the plate holder 12 is removed from the casing 2. Therefore, the thrust plate 13
There is no need to worry about the installation. Moreover, the opening 2e
Since it can be automatically closed by assembling the plate holder 12 to the casing 2 which is absolutely necessary, it is not necessary to separately perform a dedicated work for closing the opening 2e. Does not decrease.

The present invention is not limited to the above embodiment, and the thrust plate may be integrally molded with the lid portion of the plate holder. In such a case, the thrust plate is assembled at the same time when the plate holder is assembled. It can be attached and the work can be further simplified.

[Advantages] In summary, since the present invention is constructed as described above, the motor shaft receives the load in the thrust direction by the thrust plate, but at this time, the thrust plate surrounds the four sides around the shaft center. Since it is incorporated in the recessed hole in the state of being formed, it is possible to reliably prevent the thrust plate from falling off, the grease flowing out, and the metal abrasion powder from scattering as in the conventional one.

Moreover, the thrust plate can be easily inserted and assembled from the opening that is open when the plate holder is removed from the casing, and there is no troublesome work.In addition, closing the opening is a necessary assembly of the plate holder to the casing. Since it is automatically performed by attachment, no special work for closing is required and workability is good.

[Brief description of drawings]

FIG. 1 shows an embodiment of a thrust plate mounting structure for a power antenna motor according to the present invention. FIG. 1 is a partial sectional view showing a state in which the power antenna motor is assembled in a casing. FIG. 2 is the same front view, FIG. 3 is the same rear view, FIG. 4 is a front view showing a plate holder, and FIG. 5 is a side sectional view of a main part showing a state in which a power-driven mechanism is installed in a casing. FIG. In the figure, 1 is a motor, 2 is a casing, 2b is a drive chamber,
2c is an electric chamber, 2d is a concave hole, 11 is a detection wheel, 12 is a plate holder, 12b is a lid, and 13 is a thrust plate.

Claims (1)

[Scope of utility model registration request] 1. A drive / motor mechanism for transmitting power from a motor shaft to a drive gear is internally provided on the drive chamber side of a casing partitioned by a partition surface, and the rotation speed of the motor shaft is detected on the electric chamber side. In the motor for a power antenna incorporating the electric component described above, a concave hole into which the tip of the motor shaft is recessed in the thrust direction is formed in the partition surface so that the electric chamber side is opened, and the thrust plate is passed through the opening. Is configured so that it can be inserted and incorporated from the side of the electric chamber, and the opening is detachably fixed to the side of the electric chamber and closed by a lid formed on a plate holder that constitutes the electric component. Power antenna motor thrust plate mounting structure.