JPH07663Y2 - Exhaust elbow mounting structure for backpack mowers - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an exhaust elbow mounting structure for a backpack-type mower in which an exhaust elbow is attached to a tail pipe tip side of a muffler equipped in a rotatable engine.

[Prior Art] Conventionally, a backpack type in which a cutting blade driving engine equipped with a muffler with a tail pipe protruding to the side is rotatably mounted around a vertical fulcrum shaft and mounted on a backpack frame. In the mower, the tip of the tail pipe is configured so as not to project outside the muffler cover that covers the muffler, and the tip side of the tail pipe projects outwardly from the muffler for a short time.

[Problems to be solved by the invention] In this type of mower, the engine rotates around the fulcrum shaft according to the operating procedure on the cutting blade side, so that the exhaust gas from the tail pipe is transmitted to the worker side. So that it is not discharged
The exhaust elbow that guides the exhaust to the rear side of the fuselage is connected to the tip side of the tail pipe, but as described above, the tip side of the tail pipe protruding from the muffler is short, and
Since it is located on the inner side of the muffler cover, the operation of connecting the exhaust elbow is difficult and it is difficult to connect, and in addition, if the vibration of the airframe or other objects hit it, it will fall off.

[Means for Solving the Problems] The present invention solves such a problem and enables the exhaust elbow to be mounted easily, reliably and satisfactorily, and also with the deflection adjustable. , A plurality of connecting arms that can be bent in the diametrical direction and have a bending engagement portion at the tip are integrally formed on one end side of the engine mounting cylinder, and the tip of the tail pipe is provided on the outer periphery of the elbow mounting cylinder. It is configured such that a tightening nut capable of abutting against is screwed, and the exhaust elbow is rotatably mounted via a mounting member.

[Operation] Therefore, the coupling arm is bent and inserted into the tail pipe from the tip side, and when the bending engagement portion of the tip engages with the inner end of the tail pipe, the fastening nut is urged against the tip of the tail pipe. The elbow mounting tube can be connected and fixed to the tail pipe by screwing until it fits together, and when it is attached to the elbow mounting tube via the mounting member, the exhaust elbow can be directed in the desired direction. You can set it.

Example Next, an example shown in the drawings will be described.

Fig. 2 shows a side view of a backpack-type mower. A fuel tank (11) is installed above the engine (A) in which a muffler (2) is connected to the lower lower part of the rear, and a lower part of the center of the engine (A) is installed. A fulcrum shaft (3) is hung from a support plate (12) fixed to one side, and the fulcrum shaft (3) is attached to a support body (13) erected above the lower portion of the backpack frame (4) having a side surface L shape. ) Is mounted so that it can be freely rotated, and a back support (14) and both shoulder straps (15) are attached to the front of the backpack frame (4) on the standing side, respectively, and extended from the lateral side of the engine (A). An operating rod (18) having both grips (17) is transmission-coupled to the tip end side of the flexible transmission shaft (16) to be ejected, and below the gear case (19) connected to the tip end of the operating rod (18). Although the cutting blade (20) is mounted on the shaft in the same manner as in the conventional structure, a muffler cover ( 10) is attached, an opening (10a) is formed on the lateral side of the muffler cover (10), and the opening extends laterally from the inside of the muffler (2) toward the opening (10a) side. Attach the muffler cover (1
0) The structure is constructed in the same manner as the conventional structure by projecting shortly so that it does not project further outward.

(6) is an elbow mounting cylinder, which is formed to have a smaller diameter than the tail pipe (1) and has an external thread (6a) formed on the outer periphery thereof, and a cross section is curved on one end side of the elbow mounting cylinder (6). The connecting arms (5) and (5) are integrally formed, and the connecting arms (5) and (5) have substantially the same length as the tail pipe (1) and a narrow width, and are bent in the diameter direction. Each of the tips has an outward bending engagement portion (5a) that can be engaged with the inner end of the tail pipe (1).
(5a) is formed and configured.

Further, a tightening nut (7) capable of abutting against the tip of the tail pipe (1) is screwed into the elbow mounting cylinder (6) and is fixed to the end of the exhaust elbow (8). Although it is configured by screwing the working nut (9), a lock nut that can come into contact with the mounting nut (9) may be further screwed.

In addition, instead of the mounting nut (9), a retaining member or the like is used to rotatably lock the base end portion of the exhaust elbow (8), and the elbow mounting cylinder (6) is attached. You may make it the structure attached.

Therefore, as shown in FIG. 8, both connecting arms (5)
While bending the tip side of (5) inward, insert it into the tail pipe (1) from the outside and push it in as shown by the arrow (a). When it is pushed in fully, both connecting arms (5)
(5) is bent outward to bend the engaging portions (5a) (5a), respectively.
Engages with the inner end of the tail pipe (1), and when the tightening nut (7) is screwed and tightened until it abuts against the tip of the tail pipe (1), the elbow mounting tube ( 6) can be firmly connected to the outside of the tip end side of the tail pipe (1).

Further, a mounting nut (9) is screwed onto the elbow mounting cylinder (6) to connect the exhaust elbow (8) in a directionally adjustable manner, and as shown in FIG. The exhaust elbow (8) can be exhausted to the rear of the machine as shown by the arrow (b) so that the exhaust gas does not flow out to the rear of the machine. When the engine (A) rotates about the fulcrum shaft (3), the muffler (2) simultaneously moves, for example, as shown in (c), (d), and (e) in FIG. 9, and exhausts in each state. By adjusting the direction of the elbow (8), the exhaust gas can be discharged to the rear side of the fuselage as indicated by the arrows.

[Advantage of the Invention] As described above, according to the present invention, by inserting the connecting arm (5) into the tail pipe (1) and tightening the tightening nut (7), the tail pipe (projecting shorter than the muffler (2) ( The elbow mounting cylinder (6) can be easily connected to the tip side of 1), and the exhaust elbow (8) is attached to the elbow mounting cylinder (6) via the mounting member (9). Since it can be turned to a desired direction, the exhaust elbow (8) can be easily and reliably connected to the tip side of the short tail pipe (1) so as not to fall off, and the exhaust gas can be connected to the worker side. The exhaust elbow (8) can be easily turned and adjusted so as not to be discharged, and has a feature that it can be suitably implemented with a simple mounting structure.

[Brief description of drawings]

FIG. 1 is a plan sectional view of an essential part of the present invention, FIG. 2 is a side view of a backpack-type mower, FIG. 3 is an enlarged view of a part thereof, and FIG. 4 is a part of FIG. FIG. 5, FIG. 5 is an exploded view of FIG. 1, FIG. 6 is a plan view of the elbow mounting cylinder, FIG. 7 is a side view thereof, FIG. 8 is an operation explanatory view, and FIG. 9 is an explanatory view. Shows an explanatory diagram. (1) ... Tail pipe, (2) ... Muffler (A) ... Engine, (3) ... Support shaft (4) ... Back frame, (5a) ... Refractive engagement part (5) ... Connecting arm, (6) ... Elbow mounting cylinder (7) ... tightening nut, (8) ... exhaust elbow (9) ... mounting member

Claims (1)

[Scope of utility model registration request] 1. A backpack frame in which an engine (A) for driving a cutting blade equipped with a muffler (2) having a tail pipe (1) projecting laterally is rotatable about a vertical fulcrum shaft (3). (4) In a backpack-type mower configured to be mounted on the elbow mounting cylinder (6), a plurality of connecting arms (5) that can be bent in the diametrical direction and have a bending engagement portion (5a) at the tip are attached. ) Is integrally formed at one end side of the exhaust pipe, and a tightening nut (7) that can abut against the tip of the tail pipe (1) is screwed to the outer periphery of the elbow mounting cylinder (6). An exhaust elbow mounting structure characterized in that (8) is made rotatable and is mounted via a mounting member (9).