JPS60222597A - Variable node type movable-vane fixing apparatus for axial-flow blower - Google Patents

Abstract

PURPOSE:To simply set a vane angle by keeping the top edge of a bolt into the contact with a blind cover by the rebound force of a spring set between a spring stop body and a fixed metal fitting and executing the conversion to the circular movement by the round rod of an arm, in the variable node movable-vane fixing apparatus for a blower. CONSTITUTION:When the angle of a blade 12 is adjusted, a nut 39 is loosened, and a stop bolt 40 having a lever is screwed, and a blind cover 35 and a fixing metal fitting 22 are slided, keeping the contact with the top edge of the bolt 40, and a desired vane angle is obtained by the circular movement of an arm 13 having a round rod 15 turnably nipped by a fan-shape part 29 and a pressing metal fitting 30. Therefore, the vane angle can be set to an optimum position by operating the bolt from the front surface of the vane.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a variable-articulation rotor blade fixing device for an axial blower used for industrial use and air conditioning in factories, buildings, warehouses, etc.

Structure of the conventional example and its problems The rotor blade fixing device of the conventional axial blower is tightened to the base of the blade 101 as shown in Figs. 1 and 2. - Bolt 10
The blade of the hub 103 was installed by inserting the grade 101 into the hole 104, setting the angle, and tightening with the nut 106 via the washer 106. Therefore, when assembling the impeller, the angle of each blade must be set and tightened, which takes a long time. Sometimes, when the angle of the blades is changed, the blades have to be disassembled again and the settings must be restarted one by one from the beginning.

OBJECT OF THE INVENTION The present invention solves these conventional drawbacks, and provides a structure in which the blade angle can be easily set from the front of the impeller without having to adjust the angle of each blade individually. With the goal.

Structure of the Invention The present invention is characterized in that an arm is attached to the root end of a blade that is attached through a blade attachment hole in a hub body.
A round bar fixed perpendicularly to the protruding part of the arm is rotatably inserted into multiple fan-shaped parts formed by cuts in the disc-shaped part of the fixing fitting, which has a hole into which the boss part is inserted, using a presser metal fitting, and the same is fixed. The spring that fits and inserts the boss part between the disk-shaped part of the metal fitting and the spring stopper part of the hub body is held down, and the other side of the fixing metal fitting has a cylindrical part with a blind cover, and a locking nut is installed in the center. A variable-articulation rotor blade fixing device for an axial blower consisting of a hub cover attached to the bowl-shaped tip of the hub body, and a screw-in screwed handle sealing bolt so that the tip contacts the blind lid, and a hub cover attached to the bowl-shaped tip of the hub body. Due to the repulsive force of the spring stored between the spring stopper part of the hub body and the fixing metal fitting, the tip of the bolt always comes into contact with the blind cover provided on the fixing metal fitting, and the scissors are rotatably attached to the fixing metal fitting and the holding metal fitting. The built-in round bar of the arm allows the fixing metal to maintain a plane perpendicular to the motor shaft and convert the sliding movement into an arc-shaped movement, and by operating the locking bolt from the front, it can be easily This allows the blade angles of all blades to be set to the optimal position.

DESCRIPTION OF EMBODIMENTS Examples of the present invention will be described below with reference to FIGS. 3 to 6.

In the figure, reference numeral 1 is approximately bowl-shaped, with a boss part 3 in the center having a hole into which the motor shaft 2 is inserted, a plateau-like spring stop part that is wider at the base of the boss part 3, and an outer peripheral side wall. A plurality of holes 5 for attaching the blade are formed in the hub body, and a ring-shaped flat surface 6 at the bowl-shaped tip has a plurality of screw holes 8 for attaching the hub cover 7, and a reference numeral 9 indicates the hub body 1 to be attached to the inside of the boss portion 3. The bolt is fixed to the shaft 2 through the washer 11 inserted into the uneven hole 1oK, 12 is the blade rotatably provided in the blade attachment hole 6 provided in the hub body 1, and 13 is the blade. This is an arm for attaching the blade 12 to the hub body 1. It is disc-shaped and protrudes in one direction. The protruding part 14 is provided with a round bar 16 vertically. Several bolts 17 are attached via washers 16 to the hub body 1. It is fixed to the root end of the blade 12 of. The hub cover 7 has a bowl shape and is inserted into a plurality of evenly located screw holes 8 in a ring-shaped flat surface 6 at the bowl-shaped tip of the hub body 1 through washers 18 .
For installation, fit through hole 19 and screw together with bolt 20.
Fixed. The hub cover has a screw hole 21 in the center, and has a thick shape near the center. Reference numeral 22 has a hole 23 into which the boss 3 is fitted, a disc-shaped portion 25 having a plurality of notches 24 at even positions on the outer periphery, and an opening 26 slightly larger than the hole 23 on the top surface into which the boss 3 is fitted.
It is a fixing metal fitting consisting of a cylindrical part 28 provided with a lid part 27 with , through the washer 31, screw the bolt 32 into the screw hole 33 of the fan-shaped part 29 and attach it. Fixing metal fittings 22
A spring 3 whose both end surfaces are perpendicular to the central axis of the spring 34 and whose inner diameter matches the outer diameter of the boss portion 3 is provided between the spring stopper portion 4 and the spring stopper portion 4.
4 is stored perpendicularly to the mold shaft 2 by the fixing fitting 22, and a flat blind lid 36 is attached to the lid portion 27 of the fixing fitting 22.
is fixed to the screw hole 38 on the lid part 27 with a bolt 37 through a washer 36, and is fixed to the screw hole 2 of the hub cover 7.
1, a mounting bolt 4 equipped with a locking nut 39;
0, contact the blind lid 36, and tighten the locking nut 39 to fix it.

In the above configuration, when adjusting the angle of the blade 12, loosen the locking nut 39 from the front side, and then screw in or loosen the locking bolt 40 of the handle, which can be screwed in or loosened. Lid 3
6. Due to the balance with the spring 34, the fixing bracket 22 always slides while maintaining contact with the tip of the handle sealing bolt 40, and accordingly, the fan-shaped portion 29 of the fixing bracket 22 and the holding bracket 3° allow it to rotate freely. The arm 13 having the round rod 16 sandwiched therein makes an arcuate movement, sets the plurality of blades 12 at a predetermined blade angle, and tightens the handle sealing pole 40 with the loosening nut 3.
It is fixed by tightening with 9.

In addition, since the fixing metal fitting 13 has a plurality of evenly spaced cuts 24, the impeller can be easily assembled.

Effects of the Invention According to the present invention, the repulsive force of the spring stored between the spring stopper part of the knob main body and the fixing metal fitting keeps the tip of the handle sealing bolt fixed to the fixing metal fitting. The arm's round bar, which contacts the lid and is rotatably sandwiched between the fixing metal fitting and the presser metal fitting, converts the sliding movement of the holding metal fitting perpendicular to the motor shaft into circular arc-shaped movement of the arm. . By screwing in or loosening the handle sealing bolt from the front of the blade without using any tools, the blade angles of all the blades can be easily set to the optimal position at once via the fixing metal fittings. Assembly is also easy by using the notch in the fixing metal fittings and passing through the arm.

At the blower construction and installation site, even if it is necessary to change the blade angle setting for performance reasons, there is no need to remove the impeller from the motor shaft or disassemble it, and the handle sealing bolt can be removed from the front with a tool. All blades can be easily set to the optimal blade angle at once by screwing in and loosening the blades without using a screw.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventional blade, Fig. 2 is a side view showing a variable joint rotor blade fixing device of a conventional axial blower, and Fig. 3 is a variable joint blade fixing device of an axial blower according to an embodiment of the present invention. A side view of the impeller of the articulating blade fixing device, Figure 4a is a front view of the same blade and arm assembly, Figure 5b is a side view of the same, and Figure 5a is the assembly of the same fixing metal fitting, presser metal fitting, and round bar of the arm. In the front view of the state, b is the side view,
FIG. 6d is a plan view of the fixture, and FIG. 6b is a side sectional view. 1...---Hub body, 7...Hub cover,
12...Blade, 13...Arm, 22...
・・Fixing metal fittings, 3o・・Press metal fittings, 36・・・・
・・Blind lid, 39・・Loosening nut, 40・・・
...Handle sealing bolt. Name of agent: Patent attorney Toshio Nakao and 1 other person −
1st FgJ Fig. 3 12 Fig. 4 (1; L, + (b) 8 Fig. 5 (α) <b no

Claims (1)

[Claims] A bowl-shaped boss part with a hole for fitting the shaft of the electric motor is provided in the center, and a plurality of blade attachment holes are formed on the outer circumferential side wall. A disc-shaped fixing fitting having an arm provided at the root end of the blade that is attached through a hole, and a hole into which a round bar fixed perpendicularly to the protruding part of this arm is inserted. A presser metal fitting configured to be freely rotatable is inserted into a plurality of fan-shaped portions formed by the notches of the portion, and a boss portion is inserted between the disc-shaped portion of the fixing metal fitting and the spring stopper portion of the hub body. The spring is held down, and the other side of the fixing fitting has a cylindrical part with a blind lid, a locking nut in the center, and a handle sealing bolt whose tip is screwed into contact with the blind lid. , a variable-articulation rotor blade fixing device for an axial flow blower, consisting of a hub cover attached to the bowl-shaped tip of the hub body.