JPH076466B2 - Air cleaner for work equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner for a working machine equipped with an engine.

(Prior Art) Generally, in a working machine, the console box and the air cleaner are formed separately, and are separately mounted on the working machine or the engine, which causes a cost increase. Moreover, the structure is complicated and the number of parts is large. As prior art
There is 52-156811.

(Object of the invention) The object of the present invention is low cost, good dust sealing performance,
Another object of the present invention is to provide an air cleaner device for a working machine that can effectively prevent rainwater and wash water from entering.

It is also an object of the present invention to reduce the cost and size of the console box.

(Means for Achieving the Purpose) The present invention relates to an air cleaner for a working machine in which an engine is mounted and a console box is provided on an operation handle, and an air cleaner case is integrally formed with the console box to form an engine carburetor. Connected to.

For ease of manufacturing, the air cleaner case is provided with an opening for attaching an air cleaner cap to form a resin molding that is integrated with the console box by a split mold, and the air cleaner cap is attached to and detached from the opening of the air cleaner case. Install freely.

In order to reduce intake noise and prevent water from entering, a soundproof and water intruding shield plate is integrally formed with the console box.

In order to reduce the number of parts of the console box, etc., the console box is attached to the operation handle via the mounting bracket, and the guide portion supporting the support shaft portion of the control lever and the support shaft portion of the clutch lever are supported by the mounting bracket. A guide part is formed.

In order to improve maintainability and facilitate the manufacture of the air cleaner cap, the air cleaner cap is a one-piece resin molded product with a split mold, has an element holding part on the back side, and an air cleaner case on one side. Between the flange of the element and the air cleaner case, there is a fixed hook that can be engaged at one end of the element and a hinge type snap hook that can be engaged at the other end of the air cleaner case at the other side. Interpose an elastic seal on.

Further, in order to prevent water intrusion, a console box is attached to the operation handle, a fresh air introduction port is formed in the mounting bracket, and a rainwater invasion eave is formed on the introduction port.

To prevent the accumulation of water in the air cleaner case,
A drainage notch is formed in the center of the lower wall of the air cleaner case.

(Operation) Fresh air is sucked in from, for example, the fresh air inlet of the console box mounting bracket, passes through the element in the air cleaner case, and is sent to the carburetor of the engine through the snorkel.

The intake sound is shielded by a shield plate between the console box and the air cleaner case, and is prevented from leaking to the operator from, for example, a lever groove of the console box. Further, the shielding plate prevents washing water, rainwater, etc. from the console box from entering the air cleaner case, and even if water is collected in the air cleaner case, it is discharged from the notch in the lower wall.

(Embodiment) FIG. 6 shows a schematic side view of a working machine provided with an air cleaner according to the present invention. A working machine having an arbitrary working mechanism (not shown) is equipped with a working mechanism engine 1 and a rear portion thereof. Is provided with a pair of left and right operation handles 2, and the operation handles 2
A console box 10 and an air cleaner 11 are provided at the hand part (upper part) of the. The air cleaner 11 is connected to the carburetor 3 of the engine 1 via the snorkel 5.

In FIG. 3 showing a horizontal sectional view of the air cleaner, both left and right ends of a mounting bracket 15 are fixed to the rear surfaces of the left and right operation handles 2 with bolts 17 and the like. The air cleaner 11 and the console box 10 are arranged on the front surface of the mounting bracket 15 as shown in FIG. 2, and the upper end of the console box 10 and the left and right ends of the air cleaner 11 are bolts 22.
It is fixed to the mounting bracket 15 by, for example. A lever guide groove 32 is formed in the console box 10, and a control lever 30 projects forward and upward from the guide groove 32.

In FIG. 1 showing a vertical side view of the air cleaner, an air cleaner 11 is arranged below the console box 10, and an air cleaner case 19 having a front opening and a detachable front opening of the air cleaner case 19 are detachable. It has an air cleaner cap 20 to be attached to the.

The air cleaner case 19 is resin-molded integrally with the console box 10.
Since 10 is a rear opening shape and the air cleaner case 19 is a front opening shape, it is resin-molded by, for example, a two-piece molding die in which the directions of the arrows P and P ′ are the drawing direction. At the bottom of the console box 10, the console box
A shielding plate 35 that shields the inside and the lower side is integrally formed so as to extend rearward.

The air cleaner cap 20 is a resin-integrally molded product, which is integrally provided with a fixed type hook 44 at the upper end portion and is integrally provided with a rotary type snap hook 46 having a hinge portion (thin-walled portion) 45 at the lower end portion, At the time of resin molding, the snap hook 46 is opened and resin molding is performed by a split mold in the pulling directions P and P '.

Dual type element in the air cleaner case 19
23 is inserted from the front, an elastic seal 41 for sealing the element peripheral edge is arranged between the outer peripheral flange portion 42 of the element 23 and the front end peripheral edge concave portion 48 of the air cleaner case 19, and the pressing portion 53 of the air cleaner cap 20. Thus, the outer peripheral flange portion 42 of the element 23 is pressed rearward.
The dual type element 23 has a sponge portion 51 at the front,
It has a paper section 50 at the rear.

The fixed upper end hook 44 of the air cleaner cap 20 is engaged with the step portion 43a at the lower front side of the console box 10, while the lower end snap hook 46 of the air cleaner cap 20 is engaged with the protruding portion 43b at the lower end of the air cleaner case. There is.

A fresh air introduction port 37 is formed on the upper rear surface of the mounting bracket 15, and a hood 38 for preventing rainwater intrusion is formed on the introduction port 37. The fresh air inlet 37 is a shield plate as shown by the arrow.
The lower side of the element 35 communicates with the front surface of the element 23.
The rear surface of the element 23 communicates with the lower snorkel 5.

On the upper end of the mounting bracket 15, there are integrally formed a switch mounting portion 15a which is bent forward in an inclined shape and a lateral tubular guide portion 25 for a clutch lever. An engine switch 29 is mounted on the switch mounting portion 15a, a lateral shaft portion 26a of a clutch lever 26 is rotatably supported on a tubular guide portion 25, and the clutch lever shaft portion 26a is fixed by a holding metal fitting 58 so as not to fall forward. Has been suppressed from. A stopper 27 is fixed to the clutch lever shaft portion 26a, and when the clutch lever 26 is returned to the front clutch disengaged position as shown in FIG. 1, the stopper 27 is attached to the mounting bracket.
The clutch lever 26 is locked by hitting the front surface of 15.

A cylindrical vertical guide portion 33 that rotatably supports a vertical lever shaft portion 31 of the control lever 30 is formed on the rear surface of the mounting bracket 15. The control lever shaft portion 31 is pressed from the front by a retainer 39 so as not to fall off.

FIG. 4 is a rear view of the air cleaner cap 20, in which four auxiliary holding portions 54 are formed in the vertical direction inside the frame-shaped element holding portion 53, and when the cap is attached, The sponge portion 51 shown in the figure can be pressed.

FIG. 5 is a bottom view of the air cleaner case 19, and a notch 55 for draining water is formed at the front end of the center of the lower wall of the air cleaner case 19 in the left-right direction.

The operation will be described. While the engine is rotating, fresh air is introduced from the fresh air inlet 37 of the mounting bracket 15 shown in FIG. 1, passes through the underside of the shield plate 35, and reaches the front side of the element 23.
Through the air cleaner case 19 into the lower snorkel 5 and supplied to the carburetor 3 of the engine 1 shown in FIG.

The shielding plate 35 prevents the intake sound from being transmitted to the operator, and also prevents wash water and rainwater from entering the air cleaner case 19 from the console box 10.

For the assembly of the element 23 and the like, after inserting the elastic seal 41 and the element 23 into the air cleaner case 19, first, the upper end fixed type hook 44 of the air cleaner cap 20 is engaged with the step portion 43a, and then the air cleaner cap 20 After aligning the lower end portion with the lower end portion of the air cleaner case 19, the lower end snap hook 46 is rotated rearward to engage with the protruding portion 43b.
By attaching the cap, the elastic seal 41 is compressed, and the element 23 is fixed by the pressing portion 53 and the like so as not to rattle.

Even if water enters the air cleaner case 19, it is discharged from the notch 55 in the lower end wall of the air cleaner case 19 shown in FIG.

(Effects of the Invention) As described above, the present invention is a working machine in which an engine is mounted and a console box is provided in an operation handle: (1) A structure is formed by integrally forming an air cleaner case with the console box. In addition to being simple, the number of parts is reduced, and cost reduction can be achieved.

(2) By forming the air cleaner case integrally with the console box, the air cleaner case is arranged in the hand handle portion where the influence of dust and the like due to work is small, and the element replacement period is extended. In addition, by arranging the element near the operation handle, it is easy to inspect and replace the element and maintainability is good.

(3) By forming an open surface on the air cleaner case and attaching the air cleaner cap in a detachable manner, the air cleaner case and the console box are integrally molded, and the air cleaner cap is molded in two separate molds. And can be easily manufactured.

(4) By integrally forming a sound-shielding and water-shielding shield plate between the air cleaner case and the console box, the effect of intake noise on the operator can be reduced, and from the console box to the air cleaner case. It can prevent wash water or rainwater from entering.

(5) By forming the control lever shaft portion supporting guide portion and the clutch lever shaft portion supporting guide portion on the mounting bracket, a low-cost and compact console box can be provided.

(6) The air cleaner cap is an integrally molded resin product, has an element pressing portion on the back side, and has a hook portion at one side to which one end of the air cleaner case can be engaged.
On the other side, there is a hinged rotatable snap hook that can be engaged with the other end of the air cleaner case, and by interposing an elastic seal between the flange of the element and the air cleaner case, The air cleaner cap is easy to put on and take off, and the element does not wobble due to vibration, etc., and the dust seal performance is improved.

(7) By forming a fresh air inlet on the mounting bracket and forming a rainwater intrusion prevention eave on the inlet,
It is possible to prevent rainwater from entering through the fresh air inlet.

(8) By forming a drainage notch in the center of the lower wall of the air cleaner case, even if water enters the air cleaner case, it can be quickly discharged to the outside and water will not accumulate in the air cleaner case. Absent.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an air cleaner to which the present invention is applied, FIG. 2 is a view taken in the direction of arrow II in FIG. 1, and FIG.
-III cross-sectional view, FIG. 4 is a rear view of the air cleaner cap (view of IV arrow in FIG. 1), FIG. 5 is a bottom view of the lower wall of the air cleaner case (view of V arrow in FIG. 1), FIG. 6 is a schematic side view showing an example of the working machine. 1 ... engine, 2 ...
… Operating handle, 10 …… Console box, 11 …… Air cleaner, 15 …… Mounting bracket, 19 …… Air cleaner case, 20 …… Air cleaner cap, 23 ……
Element, 25 …… Guide part, 26 …… Clutch lever,
30 …… control lever, 33 …… guide part, 35 …… shielding plate, 37 …… fresh air inlet, 38 …… overhang, 41 …… elastic seal, 42 …… flange part, 44 …… fixed hook, 45 …… Hinge part, 46 …… Rotating snap hook, 55 …… Notch

Claims (7)

[Claims] 1. A working machine in which an engine is mounted and a console box is provided at a hand portion of an operating handle, wherein an air cleaner case is formed integrally with the console box and is connected to a carburetor of the engine. Air cleaner for work equipment. 2. An air cleaner case is provided with an opening for mounting an air cleaner cap to form a resin molded product integrated with a console box by a split mold, and the air cleaner cap is detachably attached to the opening of the air cleaner case. The air cleaner for a working machine according to claim 1, which is attached. 3. The air cleaner for a working machine according to claim 1, wherein a shield plate for sound insulation and for preventing water intrusion is integrally formed between the air cleaner case and the console box. 4. A console box is attached to an operation handle via a mounting bracket, and the mounting bracket is provided with a guide portion for supporting a spindle portion of a control lever and a guide portion for supporting a spindle portion of a clutch lever. The air cleaner for the working machine according to 1. 5. A fixed-type hook in which an air cleaner cap is an integral resin molded product formed by a split mold, has an element pressing portion on the back surface, and is engageable with one end of an air cleaner case on one side. 3. The other side has a hinge-type snap hook that is engageable with the other end of the air cleaner case, and an elastic seal is interposed between the flange portion of the element and the air cleaner case. Air cleaner for work machines. 6. The work according to claim 1, wherein the console box is attached to the operation handle via a mounting bracket, a fresh air inlet is formed in the mounting bracket, and a rainwater intrusion eave is formed on the inlet. Air cleaner for machine. 7. The air cleaner for a working machine according to claim 1, wherein a drainage notch is formed in a central portion of a lower wall of the air cleaner case.