JPH0450937Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a blower drive device for a speed sprayer that sprays chemicals in orchards and the like.

[Conventional technology]

The speed sprayer according to the present invention is provided with a large number of spray nozzles at the outlet of the blower at the rear of the machine, and the chemical sprayed from the spray nozzles is dispersed by the air from the blower and sprayed over a wide area at once. For example, see Public Relations No. 58-4600).

The blower in the speed sprayer as described above is driven by a mounted diesel engine or the like.

Specifically, conventionally, a propeller shaft is usually connected to the output shaft from the engine via a universal joint, and the impeller shaft of the blower is further connected to the other end of the propeller shaft via a universal joint. The shaft was positioned and supported by a plurality of bearings so that it did not swing.

[The problem that the idea aims to solve]

In conventional drive devices such as those mentioned above, in order to drive the blower effectively, each member must be accurately positioned and assembled, and many universal joints, bearings, etc. are used, which tends to be expensive. However, in view of this point, it is an object of the present invention to provide a blower drive device that is easy to manufacture and inexpensive, with a reduced number of component parts.

[Means to solve the problem]

In order to achieve the above object, the present invention has a structure in which the number of shaft joints such as universal joints and bearings supporting the impeller shaft are reduced.

In other words, the impeller shaft of the blower is connected to the output shaft from the engine via a shaft coupling, the near end of the shaft is supported by a self-aligning bearing, and the impeller is fixed to the end. .

Furthermore, in order to improve the performance of the blower, the tips of the blades constituting the impeller are rounded around a self-aligning bearing.

[Effect]

In the present invention, the impeller shaft of the blower is directly connected to the output shaft from the engine via a shaft joint or the like to a universal joint.

Therefore, there is no need to prepare a conventional propeller shaft, and the number of shaft couplings can be reduced.

Furthermore, in the present invention, since the vicinity of the tip of the impeller shaft is supported by a self-aligning bearing, it is possible to absorb misalignment of the impeller, etc. Therefore, the number of bearings is also reduced compared to the past.

In the present invention having the above configuration, when the engine is driven, the impeller is rotated via the output shaft, the shaft joint, and the impeller shaft.

Even if a large runout occurs due to engine vibration, for example, when the engine starts driving, it is absorbed by the self-aligning bearing and the blower can be driven without any problem.

In addition, if the tips of the blades are rounded around the self-aligning bearing, even if a large swing occurs in the impeller, the gap between the blower housing and the tips of the blades constituting the impeller will be reduced. That is, the chip clearance is maintained constant and the blower performance is maintained at high performance.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

In Figure 2, 1 is the driver's seat installed at the front of the aircraft, 2 is the diesel engine for both driving and 3
4 is a chemical liquid tank, and 4 is a large number of spray nozzles provided along the outlet 24 of the axial blower 5.

The speed sprayer configured as described above is operated by an operator sitting in the driver's seat 1, and while the machine is running, the blower 5 is driven to spray the chemical liquid from the spray nozzle 4 to the surrounding area.

The present invention relates to a driving device for the blower 5. The details are shown in FIG.

An impeller shaft 8 of the blower 5 is connected to an output shaft 6 to which driving force is transmitted from the engine 2 via a transfer (not shown) through a shaft joint such as a universal joint 7, and the impeller shaft 8 of the blower 5 is connected to the output shaft 6 to which driving force is transmitted from the engine 2 via a transfer (not shown). It extends rearward through a tunnel portion 25 provided in the tank 3. In the embodiment shown in the drawings, the impeller 8 is divided into two parts, and a spline joint 10 is provided between the two parts in order to facilitate manufacturing and positioning of the impeller 9.
They are telescopically connected.

Next, near the tip of the impeller shaft 8 is supported by a self-aligning bearing 11, and the impeller 9 is attached to the tip 22 of the self-aligning bearing 11.
is fixed by a washer 12, a nut 13, etc.

Note that it is preferable that the mounting housing 21 of the bearing 11 is accommodated in the inner space 26 of the boss portion 23 of the impeller 9 because the length of the machine body can be shortened.

Furthermore, in the drawing embodiment, the self-aligning bearing 1 is attached to the tip end 15 of the blade 14 constituting the impeller 9.
Each is rounded to fit within an arc centered at 1.

In the figure, 16 is an intake port, and 17 is a blower housing.

[Effect of idea]

According to the present invention, by using a self-aligning bearing, it is possible to reduce the required number of shaft couplings such as universal joints and bearings, and it is easy to manufacture and can be provided at low cost.

In addition, if the tips of the blades that make up the impeller are rounded to fit within an arc centered on the self-aligning bearing, even if the impeller swings during operation, the gap between the blower housing and the tips of the blades will be reduced. It is possible to set the gap, that is, the chip clearance to a minimum, and excellent air blowing performance can be obtained.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a cutaway plan view of the main part, and FIG. 2 is a perspective view of the entire speed sprayer. 2... Engine, 5... Blower, 6... Output shaft, 7... Shaft joint, 8... Impeller shaft, 9... Impeller, 11... Self-aligning bearing, 14... Vane, 15
...Blade tip, 22...Shaft tip.

Claims (1)

[Claims for Utility Model Registration] 1. The impeller shaft 8 of the blower 5 is connected to the output shaft 6 from the engine 2 via the shaft coupling 7, and the vicinity of the tip thereof is supported by a self-aligning bearing 11, and the tip portion 22 is A blower drive device for a speed sprayer with an impeller 9 fixedly attached. 2 Tip portion 1 of the blade 14 constituting the impeller 9
2. The blower drive device for a speed sprayer according to claim 1, wherein the portion 5 is rounded to fit within an arc centered on the self-aligning bearing 11.