JP2508507Y2 - Air intake structure for the engine using the handle of the work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an engine of a small construction machine, a small agricultural machine, a horticultural equipment, and the like, and particularly to a structure of an air intake portion thereof.

[Conventional technology]

The invention, which was published as No. 60-49261, is the third and fourth invention.
The figure will be described.

In this invention, in an air cleaner 8 having an intake pipe 12, a damper plate 20 having a throttle hole 21 is housed in the intake pipe 12 so as to be movable in the pipe length direction, and the damper plate 20 is moved on the inner circumference of the intake pipe 12. It is characterized in that stoppers 15 and 16 for restricting the above are provided separately in the longitudinal direction of the pipe, and the diameter of the throttle hole 21 of the damper plate 20 is smaller than the inner diameter of the stoppers 15 and 16.

[Problems to be solved by the device]

In a small construction machine (such as a vibrating plate) in which the engine portion is likely to be dusted, the overperformance of air sucked into the engine (prevention of dust from entering the cylinder and the combustion chamber) greatly affects the life of the machine.

Since the engine is installed relatively close to the ground,
It is inevitable that the engine will be directly exposed to dust rising from the ground while working. The air intake of the engine is equipped with an air cleaner that sucks the excess air into the engine.However, if an air cleaner with good performance is installed, the air cleaner will be blocked in a short time and frequent cleaning If you do not, you will not be able to use the machine normally. Further, if an air cleaner having poor performance is used, there is a problem that dust enters the inside of the engine and wear of the cylinder piston occurs at an early stage.

[Means for solving the problem]

The structure of the present invention for solving the above-mentioned problems is a hollow structure including a pair of left and right extension parts extending from base end parts connected to both sides of a working machine body, and an operator operation part connected to the extension parts. In an engine-equipped work machine having a pipe-shaped operation handle, the base end of the operation handle is rotatably attached to the work machine body so that the attachment angle of the handle can be changed. Connect with a connecting pipe, and connect the appropriate place of the connecting pipe and the air cleaner of the engine mounted on the work machine main body through a flexible pipe, and always at least one each on the left and right in the vicinity of the operator operating portion of the operating handle. It is characterized in that an air inlet opening in the horizontal direction is provided.

[Action]

Under use conditions in which dust that is wound up from the ground during work is scattered to the engine part, since the air intake is relatively far from the ground, dust with a relatively low concentration is sucked. Further, since the air passage is long, the amount of dust reaching the air cleaner portion is reduced by trapping dust to some extent on the air passage wall, and the frequency of cleaning and maintenance is greatly reduced.

Further, even if the handle pivots back and forth and up and down about the fulcrum, the flexible tube of the connecting portion ensures the intake passage.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2, which show a working machine including a vibrating plate,
An operating handle 54 in the form of a hollow pipe is attached to a working machine main body 52 on which the engine 51 is mounted, and the operating handle 54 has a pair of left and right extending portions extending from a base end portion 54c continuous to both sides of the working machine main body 52. An operator operation section that is continuous with the extension, and the base end portion 54c is rotatably attached to the working machine body 52 so that the attachment angle of the operation handle 54 can be changed. The extension portion is connected by a connecting pipe 54b, the proper position of the connecting pipe 54b and the air cleaner 53 of the engine 51 mounted on the working machine main body 52 are connected via a flexible pipe 55, and the operator operating portion of the operating handle 54 is connected. An air intake 54a that is always open in the horizontal direction is provided at least at one place on each of the left and right sides in the vicinity of.

Thus, the air required for operating the engine is sucked in from the air intake port 54a provided in the upper portion of the handle 54 and enters the air cleaner 53 from the connecting pipe 54b portion through the flexible pipe 55 with the inside of the handle 54 as a passage. The air filtered in the air cleaner 53 is sucked into the engine 51. Handle 54 is in the same dotted line position
Even when it is rotated to 54 ', the flexible tube 55 is
Follow the movement of part b.

When driving on the ground G, dust that winds up from the ground G is scattered upward, but the air intake port 54a is higher than the height h of the air cleaner 53 of the engine 51 due to the height H from the ground G. Therefore, air with a relatively low dust concentration can be inhaled.

Also, since the air passage from the air intake 54a to the air cleaner 53 can be set to be sufficiently long, the air that enters the air cleaner 53 must be captured by the engine in order to capture dust on the wall of the air passage.
The dust concentration is much lower than the ambient atmosphere of 51, and the dust load on the air cleaner is reduced.

Further, even if the handle 54 is rotated to the position indicated by the dotted line 54 'in the figure, the intake air passage is normally secured.

[Effect of device]

As described above, according to the present invention, the hollow pipe-shaped operation handle of the working machine main body has a pair of left and right extension parts extending from the base end parts continuous to both sides of the working machine body and an operator connected to the same extension part. It is formed from the operation part, and its base end is rotatably attached to the work machine body so that the handle attachment angle can be changed.In the vicinity of the base end, a pair of left and right extension parts are connected by a connecting pipe An appropriate position of the pipe and an air cleaner of the engine mounted on the main body of the working machine are connected via a flexible pipe, and an air intake opening which is always opened horizontally is provided at least at one left and right position near the operator operating portion of the operating handle. Since the air intake is always open horizontally in the vicinity of the operator's operating part of the operating handle, it is far from the surface of the earth where dust is generated, so it can suck in air with relatively little dust. In addition, the flexible pipe connecting the air cleaner and the connecting pipe near the base end that connects the pair of left and right extension parts of the handle may affect the function of the air passage even if the handle mounting angle is changed. Moreover, since the air passage of the handle is curved and long, the amount of dust reaching the air cleaner portion is reduced, and maintenance of the air cleaner is facilitated.

(4) Since the air passage inside the operation handle is curved, dust and water drops that have entered the air passage together with the air
Separated from the air due to inertial force near the curved part, it is difficult to reach the air cleaner.

[Brief description of drawings]

FIG. 1 is a side view of a vibrating plate according to an embodiment of the present invention,
FIG. 2 is a front view of the above. FIG. 3 is a side view of the conventional device, and FIG. 4 is an enlarged view of a main part of the same. 51 ... Engine, 52 ... Vibration plate 54 ... Handle, 54a ... Air inlet 55 ... Flexible tube, 53 ... Air cleaner

Claims (1)

(57) [Scope of utility model registration request] 1. An engine having a hollow pipe-shaped operation handle including a pair of left and right extension parts extending from base end parts connected to both sides of a work machine main body, and an operator operation part connected to the extension parts. In the working machine, the base end of the operating handle is rotatably mounted on the body of the work machine so that the handle mounting angle can be changed, and a pair of left and right extension parts are connected by a connecting pipe in the vicinity of the base end. And the air cleaner of the engine mounted on the main body of the working machine are connected via a flexible pipe, and at least one left and right side near the operator's operation part of the operation handle is provided with an air intake opening constantly in the horizontal direction. An air intake structure for the engine that uses the handle of the working machine, which is characterized by being provided.