JP2630910B2 - Blower impeller attachment / detachment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing, a suction cone fixed to the casing and extending from one side in the casing, an impeller disposed in the casing, and an impeller mounted on a side opposite to the suction cone. The present invention relates to an impeller attachment / detachment device for a single-suction type blower having a drive shaft driven from a fan.

[0002]

2. Description of the Related Art Conventionally, this type of blower is supported by bearings and is driven by another power source, or when the drive shaft is pulled out of an impeller and disassembled for the purpose of exchanging bearings of a drive shaft comprising an output shaft of a motor. However, it was necessary to disassemble the impeller to the side of the suction cone after disassembling the suction pipe and the suction cone. However, the weight of the impeller was large, the workability was poor, and a lifting device was required. For this reason, the previous work before the work such as the replacement of the bearings became a large-scale work, and was expensive, time-consuming, and required skill. Conventionally, most of the side plate on the drive shaft side of the casing is configured to be separable, and the portion is separated and moved together with the side plate with the impeller attached to the drive shaft. This also requires a lot of moving parts for disassembly, which makes the workability worse, and requires skill in centering and the like.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a single-suction type blower in which even unskilled persons can divide suction pipes and suction cones.
The it is to provide a removable method and apparatus of the blower impeller to allow withdrawal disassembly and reassembly the drive shaft from short and easily impeller with minimal effort not require.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a casing, a suction cone communicating with a suction pipe and extending from one side into the casing, an impeller disposed in the casing, and a blade penetrating through an end face of the casing. placed single suction type blower having a drive shaft for driving the vehicle with the suction cone from the opposite side
And the outside that is detachably fitted to the outside of the inner end of the drive shaft
Taper from the suction cone side toward the drive shaft side
Has a tapered surface that is tapered to a conical surface
Cut out slightly to form a notch so that it can be separated
Tubular taper bushing and fixed to the center of the impeller
Surface contact is possible with the tapered surface of the tapered bushing on the inner peripheral surface
It has an inner tapered surface and the outer peripheral surface is driven from the suction cone side.
Tapered conically so that it tapers toward the drive shaft
An impeller hub having an outer tapered surface portion;
Has a tapered surface that can make surface contact with the outer tapered surface of the
Casing fixed to the end face through which the
Release gland and impeller hub to casing gland
Tightening member to fix as much as possible and impeller for taper bushing
Fix the taper bushing to the hub and secure it to the drive shaft.
And release the impeller hub from the taper bushing
ー Tightening member that enables the drive shaft to be removed from the bushing
And a blower impeller attachment / detachment device including the following.

[0005]

An embodiment of the present invention will be described below.
In the embodiment of the present invention shown in FIG. 1, 10 is a base,
12 is a casing fixed to the base, 13 is a suction pipe connected to one side of the casing, 15 is a suction cone communicating with the suction pipe and arranged in the casing, 17
Is a support mounted on the base 10, 18 is a drive shaft supported by a bearing device 20 removably provided on the support and extending into the casing 12, 21 is fixed to the outer end of the drive shaft. This is a pulley driven from a power source (not shown) via a belt. Other power transmission means such as gears may be provided without using the pulley. Reference numeral 23 denotes an impeller fixed to the drive shaft 18 as described below.

Reference numeral 25 denotes a commercially available taper bushing fitted into the inner end of the drive shaft 18, which is prevented from rotating by a key 26 provided on the drive shaft 18, and whose arrangement is restricted by contacting the end of the key 27. ing. The tapered bushing has a narrow notch 28 formed in a part of the periphery, and has a tapered surface portion 30 tapered on the outer peripheral surface so as to taper from the suction cone 15 side toward the drive shaft 18. I have. Reference numeral 32 denotes an impeller hub fixed to the impeller 23, which has an inner tapered surface portion 33 on the inner peripheral surface capable of making surface contact with the tapered surface portion 30 of the tapered bushing 25, and a portion of the outer peripheral surface from the suction cone 15 side. It has an outer tapered surface portion 35 tapered so as to taper toward the drive shaft 18. Reference numeral 36 denotes two or more bolts serving as a fastening member for fixing the impeller 23 to the drive shaft 18 so as to penetrate through the hole 37 of the impeller hub 32 and screw into the slightly larger screw hole 40 of the tapered bushing 25. The distal end is a small diameter portion 41 and a stopper 42 is attached. When the bolt 36 is tightened, the impeller hub 32 moves toward the blowing cone 15 and is fixed to the tapered bushing 25, and the tapered bushing 25 also presses the drive shaft 18 to be more firmly fixed.
Such a state is shown in FIG. 1, and the impeller 23 can be driven by the drive shaft 18. This bolt 36
Is loosened, the impeller hub 32 is released from the tapered bushing 25.

Reference numeral 43 denotes a casing gland fixed to an end face 45 through which the drive shaft 18 of the casing 12 passes. A tapered face 47 which can make surface contact with the outer tapered face 35 of the impeller hub 32 is provided on a part of the inner peripheral surface. Have. Reference numeral 50 denotes a bolt which penetrates a hole 51 formed in the casing gland 43 and is screwed into a screw hole 53 provided in the impeller hub 32, for example, about two to four fastening members. This bolt is removed when the impeller 23 is operated. For example, the bolt 3
6 so that at least one of them is in the same direction as any one of the holes 51, or all other bolts 36 are loosened while the impeller 24 is rotated to a predetermined position by other positioning means. Be ready for release. When the bolt 50 is tightened in this state, the impeller hub 32 moves in the direction opposite to the blow cone 15 and the casing gland 43
And the impeller 23 is attached to the end surface 45 of the casing 12.
Will be fixed against. In this state, there is no force for the taper bushing 25 to press the drive shaft 18. Therefore, the drive shaft 18 can be removed together with the bearing device 20, and the bearing can be replaced.
At the time of reassembly, the bolt 50 may be removed and the bolt 36 may be tightened. In this case, for example, the surface 55 of the impeller hub 32 and the surface 56 of the casing gland 43 are the same in order to make the position of the impeller hub 32 appropriate. It is configured to tighten until it is flat.

In the present invention, a motor is detachably mounted on a support base 17 and an output shaft of the motor is connected to a drive shaft 18.
Sometimes a may be each other configured to etch away both be motor when withdrawing the drive shaft 18.

[0009]

As described above, according to the present invention, the impeller 23 is supported on the casing 12, the drive shaft 18 is removed from the impeller 23, and the bearing can be replaced. Because it can be taken out, the weight of the moving part is remarkably light and the workability has been improved,
This has the effect that centering can be performed automatically and can be easily operated even by non-experts.

[Brief description of the drawings]

FIG. 1 is a front view showing a cross section of a main part in an operable state of an embodiment of the present invention.

FIG. 2 is a front view showing a cross section of a main part in a state where the drive shaft is taken out.

FIG. 3 is an enlarged side view showing a portion such as a tapered bushing.

[Explanation of symbols]

 REFERENCE SIGNS LIST 12 casing 13 suction pipe 15 suction cone 18 drive shaft 23 impeller 25 taper bushing 28 notch portion 30 taper surface portion 32 impeller hub 33 inner taper surface portion 35 outer taper surface portion 36 bolt 43 casing gland 45 end surface 47 taper surface portion 50 bolt

Claims (1)

(57) [Claims] 1. A casing, a suction cone communicating with a suction pipe and extending from one side into the casing, an impeller disposed in the casing, and an impeller penetrating an end face of the casing and facing the impeller on a side opposite to the suction cone. Oite the single suction type blower having a drive shaft for driving the outside of the inner end portion of the drive shaft
Driven from the suction cone side to the outside that is detachably fitted to the side
Tapered conically so that it tapers toward the shaft
It has a tapered surface so that a part of the periphery can be separated.
Almost cylindrical taper bushing with notch to form notch
And an inner peripheral surface fixed to the center of the impeller
Has an inner tapered surface that can make surface contact with the tapered surface of the shing
And on the outer peripheral surface, from the suction cone side to the drive shaft side.
Outer tapered surface tapered conically so as to be thin
An impeller hub having an outer tapered surface portion of the impeller hub
Driving the casing having a tapered surface portion capable of making surface contact with the casing
A casing gland fixed to the end face through which the shaft passes,
The impeller hub can be released to the casing gland.
Fastening member and the tapered bushing to the impeller hub
Only fix the taper bushing to the drive shaft
Release the impeller hub from the taper bushing
And a tightening member that enables the drive shaft to be removed from the
A blower impeller attachment / detachment device characterized by being included.