JPS595787Y2 - Bearing device for wind direction change plate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bearing device for a wind direction changing plate used in an air conditioner or the like, and provides a bearing device that minimizes the rotational friction of the wind direction changing plate.

Below, one embodiment of the present invention will be explained based on the drawings.
1 and 2, reference numeral 1 indicates a plurality of wind direction changing blades 2, rotating shafts 3a and 3b extending up and down, and a long hole 4 extending to the rear of the upper surface.
An elongated rectangular wind direction changing plate integrally formed with a projecting piece 5 made of resin, 6a and 6b are vertical rotation shafts 3a and 3b, respectively.
A cylindrical bearing having an inner diameter larger than the outer diameter and screwed to the upper and lower plates 10 and 11 of the air outlet 9 using the mounting holes 7 and 8; A low-speed motor is fixed with a screw 16 using a mounting hole 15, and 17 is a cam having a shaft portion 19 coupled to a transmission shaft 18 of the motor and a centering shaft 20 loosely fitted into the elongated hole 4.

As shown in FIG. 3, the upper bearing member 6a has an annular rib 2 with a triangular cross section that protrudes inward from the lower end of the cylindrical inner surface.
1 is made of synthetic resin and integrally formed into a hollow shape, and the outer circumference of the upper rotation shaft 3a is held upright in a line contact state with the sharpened portion 22 (inner circumference) of this rib 21.

Further, as shown in FIG. 4, a tapered protrusion 25 that protrudes upward from the bearing end surface 23 on the inner bottom of the cylinder, for example, has a half-round tip 24, is attached to the lower bearing fitting 6b using a resin. The lower end surface of the rotating shaft 3b has a semicircular recess 26 which is integrally oval-shaped and has a larger curvature than the semicircular curvature of this protrusion, and which is brought into point contact with the tip 24. It is shaped into 27.

Therefore, the bearing fittings 6a, 6 fitted into the rotating shafts 3a, 3b, respectively.
When b is screwed onto the upper and lower plates 10.11, the apex 2 of the recess 26
8 is placed in contact with and placed on the tip 24 of the protrusion 25, and the upper rotating shaft 3a is supported from the outer peripheral side by the annular rib 21, so that the rotating shafts 3a and 3b are supported by the bearings 6a, respectively.
, 6b (7) Since the cylindrical inner walls 29 a and 29 b are held in a non-contact state, the cam 17 is rotated in the direction of the solid line arrow in FIG. When changing the direction of reciprocating rotation, the rotating frictional resistance is extremely small due to the point contact on the lower part and the line contact on the upper part, and the wind direction changing plate 1 can be smoothly driven by the low-speed motor 14 with low power.

In the lower bearing structure, contrary to the above embodiment, a recess 26 is provided on the bearing end face 23 side, and a recess 26 is provided on the lower end face 27 of the rotating shaft 3b.
The protrusion 25 may also be formed in the protrusion 25 and the recess 2.
6 may have a triangular pyramid shape, for example, as long as the tips 24 and apexes 28 of each are in point contact.

In addition, the upper bearing structure is not pressed and supported from above, but is simply held from the side of the outer periphery, so the upper and lower plates 1
Even if a bulge occurs in the spacing dimension of 0.11, the bulge can be absorbed by slightly changing the degree to which the rotating shaft 3a is inserted into the bearing portion 6a.

Furthermore, since the outer periphery of the upper rotating shaft 3a and the inner periphery of the bearing 6a of this shaft are held in line contact, rotational frictional resistance can be kept low.

Moreover, even if the combination of the lower rotating shaft 3b and the bearing fitting 6b is misaligned and the upper rotating shaft 3a is installed at an angle with respect to the bearing fitting 6a of this shaft, the rotation of the wind direction changing plate 1 will not be affected. Concerns about sticking or rattling are eliminated, making it ideal for combination with the lower bearing structure.

As described above, the present invention includes an end surface of the rotating shaft below the wind direction change plate and a bearing end surface that supports the end surface, and one of these end surfaces has a tapered protrusion, and the other has a point at the tip of the protrusion. Since the recess is shaped so that it can rotate freely in contact, the rotational frictional resistance on the lower rotating shaft is extremely small, allowing the wind direction change plate to change direction smoothly. Since the bearings are brought into contact with each other in the same manner, the bearing assembly work can be carried out easily.

Furthermore, since the rotating shaft above the wind direction changing plate and the bearing of this shaft are held in line contact, the rotational frictional resistance on the other rotating shaft can also be kept small.

Moreover, even if the lower rotating shaft is misaligned and the upper rotating shaft is installed at an angle with respect to the bearing of this shaft, there is no concern that the rotation of the wind direction change plate will become stiff or wobbling. be able to.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing one embodiment of the proposed device, Fig. 2 is a vertical sectional view showing the assembled state, and Figs. 3 and 4 are main parts of the upper and lower bearing structure in Fig. 2, respectively. It is an enlarged sectional view. 1... Wind direction change plate, 3b... Rotating shaft,
23...Bearing end face part, 24...Tip,
25... protrusion, 26... recess, 27.
... Rotating shaft end face.

Claims (1)

[Scope of utility model registration request] A rotating shaft extends from both ends of the wind direction changing plate, and includes an end face of the lower rotating shaft and a front bearing end supporting the end face, and a tapered protrusion is provided on one of the end faces, and a tapered protrusion is provided on the other end of the rotating shaft. It is characterized by a recess that is rotatably abutted in point contact with the tip of the protrusion, and in which the outer periphery of the upper rotating shaft and the inner periphery of the shaft bearing are held in line contact. Bearing device for wind direction change plate.