JPH0413560B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cross flow fan having an impeller supported at one end by a motor and at the other end by a bearing.

Conventional configuration and its problems A conventional cross flow fan of this type was configured as shown in FIG. That is, in a cross flow fan in which an impeller 5 is housed in a casing composed of a rear guider 1, a tongue portion 2, and side plates 3 and 4, a boss 5 is attached to one end of the impeller, and a shaft 5 is attached to the other end of the impeller.
b, each of which is fitted with a shaft 6a of the motor 6 and a bearing unit 7 attached to the side plate 3 to rotate the impeller. In the cross flow fan having the above configuration, the following procedure was used to house the impeller in the casing. That is, first, the impeller is placed in the casing space at an angle, and the shaft 5b is inserted into the hole 3a made in the side plate 3. Next, after fitting the shaft 5b and the bearing unit 7, the bearing unit is attached to the side plate 3.
Attach to. Finally, the motor shaft 6a is inserted into the impeller boss 5a, and then the motor 6 is attached to the side plate 4.

However, in such a configuration, assembly is complicated and takes a lot of time, and workability is extremely poor.
Furthermore, when removing the impeller from the casing for repairs, etc., it is always necessary to remove the motor and bearing unit from the side plate, but this frequent attachment and detachment of the motor and bearing unit means that the impeller cannot be placed in the correct center position. In addition to making it difficult to set the motor, the mounting condition of the motor on the side plate also deteriorates, leading to problems such as vibration generation.

OBJECTS OF THE INVENTION The present invention aims to eliminate these conventional drawbacks and to perform cross flow fan assembly and repair operations efficiently and correctly.

Structure of the Invention In order to achieve this object, the present invention comprises a rear guider, a tongue, a first side plate to which the motor is attached, a bearing unit, and a second side plate to which the bearing unit is attached, and an end portion is attached to the second side plate. a stepped slit into which the impeller shaft can be inserted between the bearing unit and the center;
and a notch is provided at the boundary between the two end planes of the bearing unit, the plane that abuts the stepped slit portion of the second side plate and the plane adjacent to this plane,
Further, the angle between the two planes is formed to be an acute angle.

With this configuration, even if the impeller is tilted and the motor shaft is inserted into the impeller boss with the motor attached to the first side plate, the impeller shaft will not hit the second side plate. It can be placed inside the casing. As a result, the impeller can be attached and detached while the motor is fixed to the first side plate. Furthermore, since the slit is provided with a step for positioning, the mounting of the bearing unit is also constant, making it possible to always mount the impeller shaft at the correct center position. Furthermore, in order to bring one plane of the bearing unit formed by five planes into contact with the slit part,
This makes it possible to improve the strength of the side plate B, which has decreased due to cutting the slits.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 2. Note that the same parts in the figure as in FIG. 1 are given the same numbers.

In FIG. 2, an impeller 5 is mounted on the bearing side side plate B3.
slits 3b and 3a are provided, through which the shaft 5b passes;
A step 3c is provided in the middle of the slit for correctly positioning the bearing unit 7.
Further, a screw hole 3d for fixing the bearing unit is formed below the terminal end of the slit. Further, the bearing unit 7 includes 7a, 7b, 7c, 7 as shown in the figure.
It is formed from five planes d and 7e, and the bearing 7f is mounted on the central plane 7c. and plane 7a
The angle between the plane 7b and the plane 7b is set to be smaller than 90°, and a notch 7g is provided at the boundary between the two planes. On the other hand, the angle formed by the planes 7d and 7e is set to be a right angle.

Such a configuration greatly facilitates assembly of the cross flow fan. Next, a procedure for assembling a cross flow fan using a casing having the above configuration will be explained. First, insert the impeller 5 from above and insert its boss 5a into the motor shaft 6.
Attach to a. Next, the upper end plane 7a of the bearing unit
is placed in the casing inner space 8 along the side plate B, inserted into the slit portion, moved downward, and stopped at the positioning step 7c. Finally, the impeller shaft 5b is inserted into the bearing 7f, and the lower end plane 7e is fixed in the screw hole 3d of the side plate B with a tightening screw. By providing the slits in the side plate B in this manner, the impeller can be housed in the casing even when the motor is attached first. Furthermore, the slit is stepped to make it two-tiered, and at the same time, the angle between the two planes 7a and 7b of the bearing unit is made into an acute angle, and the notch 7g is provided, so that the bearing unit can be installed in the correct position, and also It can also serve as reinforcement for the side plate B.

Effects of the Invention As described above, according to the cross flow fan casing of the present invention, even if the impeller is tilted and the motor shaft is inserted into the impeller boss with the motor attached to the first side plate, the impeller The impeller can be housed in the casing without the shaft of the impeller hitting the second side plate. As a result, the impeller can be attached and detached while the motor is fixed to the first side plate. Furthermore, since the slit is provided with a step for positioning, the mounting of the bearing unit is also constant, making it possible to always mount the impeller shaft at the correct center position. Furthermore, in order to bring one plane of the bearing unit formed by five planes into contact with the slit part,
This makes it possible to improve the strength of the side plate B, which has decreased due to cutting the slits.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a conventional cross flow fan, and FIG. 2 is an exploded perspective view of a cross flow fan showing an embodiment of the present invention. 1... Rear guider, 2... Tongue, 3... Side plate B, 4... Side plate A, 5... Impeller, 6... Motor, 7... Bearing unit, 3a, 3b... Slit, 3c... Step, 7f...Bearing, 7g...Notch.

Claims (1)

[Claims] 1 The first part to attach the rear guider, tongue, and motor.
a side plate, a bearing unit, and a second side plate to which the bearing unit is attached; the second side plate is provided with a stepped slit into which the impeller shaft can be inserted from the end to the center; The bearing unit is formed into a substantially rectangular shape consisting of five planes so as to fit into the slit, and
A cross having a notch provided at the boundary between the two end planes, the plane abutting the stepped slit of the second side plate and the plane adjacent to this plane, and the angle between the two planes forming an acute angle. Flow fan.