JPH06916Y2 - Dust remover for engine part of tea-mowing machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is designed such that shredded leaves and branches that are sucked into the engine section when performing tea-cutting work with a tea-cutting machine are inside the cylinder side or inside the cover. The present invention relates to a dust remover for an engine section of a tea mower that can be removed without clogging.

[Prior Art] Conventionally, in a tea mower as disclosed in Japanese Utility Model Publication No. 61-31640, a cover for guiding cooling air generated by a cooling fan provided on an output shaft to a cylinder side is attached to the outer circumference. It had a structure with an engine part that was configured as.

[Problems to be solved by the invention] Due to such a structure, when leaves and branches that are shredded and scattered are sucked from the suction side of the cooling fan during the tea-cutting work, the cylinder and the magnet coil are inside the cover. If there is a gap between them, the amount of cooling air that passes through will decrease, and there will be insufficient cooling to cause engine seizure, or shredded leaves / branches on the cylinder side will burn and emit smoke. It had such a problem.

[Means for Solving the Problems] The present invention solves such a problem, and has a simple structure so that dust can be favorably removed from the engine portion. An opening is formed in the portion of the cover that is close to, and a shutter that can be opened by the wind pressure of the cooling air and urges the elastic force toward the closing side is openably and closably attached to the opening.

[Operation] Therefore, during tea cutting, some of the cut leaves, branches, etc. will be sucked into the cover from the suction side of the cooling fan, but the shutter is pushed open by the cooling air generated by the cooling fan. In this state, the sucked leaves / branches can be discharged from the opening while removing the dust while being placed on the cooling air, and if the shutter is manually opened from the outside, the leaves / branches in the cover are scraped out. You can also do it.

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

Fig. 5 shows a perspective view of the whole tea mower, and two operating bodies (7) and (8) that can be operated by two workers while supporting the machine from both sides are provided on both sides. The lower part of the transmission case (9), which is transmitted from the engine section (E), is transmission-coupled to one end of a long reciprocating cutting blade (10), which is linked to the blower section (11) driven by the engine section (E). From the bottom of the air duct (12),
A large number of blast nozzles (13) capable of blowing air upwards (10) toward the rear are respectively installed vertically, and the cutting blade (10) and the air guide tube (1
A storage bag (14) is connected to the rear of the space between 2) and constructed in the same manner as the conventional structure.

Further, the engine part (E) is provided with a crankcase (15) on the base side of a cylinder (3) having a large number of fins on the outer circumference, and an output shaft (1) extending from the crankcase (15) A flywheel (16) is fitted to the tip on one side, and a magnet composed of an iron core (17) and a coil (18) is arranged around the flywheel (16) and engaged with the flywheel (16). Material (1
A cooling fan (2) having the above (9) is integrally formed, and a fan cover (4a) covering the outer circumference of the flywheel (16) side and a cylinder cover (4b) covering the outer circumference of the cylinder (3). ) And a cover that can guide the cooling air to the cylinder (3) side.
(4) is formed on the fan cover (4a) facing the cooling fan (2) and has a vent hole (20) around the recoil coil which can be engaged with and disengaged from the engaging member (19). It has the same structure as the conventional structure with the starter section (A).

In addition, (F) is a fuel tank.

In the engine section (E), the cooling air generated by the cooling fan (2) is pressure-fed to the cylinder (3) side in the cover (4), but with respect to the outer peripheral portion of the cylinder (3). An opening (5) is formed in the portion of the cylinder cover (4b) that approaches the windward side, and a shutter (6) that can match the opening (5) from the outside
A cylinder part (6a) (6a) is formed on both sides of the end of the fan cover (4a), and the support shaft (22) is pierced between the support pieces (21) formed on the outer surface of the fan cover (4a). Fit the part (6a) and support shaft (22)
A torque spring (23) that elastically presses the shutter (6) toward the opening (5) is provided at the center of the torque spring (23) by the wind pressure of the cooling air generated by the cooling fan (2). It is installed and constructed so that the shutter (6) can be opened by pulling on it.

Since the opening (5) is only partially opened in the cylinder cover (4b), a sufficient amount of air to cool the cylinder (3) and the like can be secured.

Further, the cooling air exhausted from the opening (5) is blown toward the plug (P) side and can cool the plug (P) portion, and the plug (P) portion is shredded. Almost no leaves or branches adhere, and if they adhere, they can be easily removed.

When the engine is rotating at a low speed, the wind pressure of the cooling air also becomes weak, but the spring characteristic of the torque spring (23) is set so that the shutter (6) is not pushed open in that state.

The opening (5) can also be provided in the fan cover (4a).

Therefore, during the tea-cutting work, some of the cut leaves, branches, etc. are scattered and the air intake holes on the outer circumference of the recoil starter section (A).
It will be sucked into the cover (4) from the (20), and as it is, it will be pumped to the cylinder (3) side while being carried by the cooling air generated by the cooling fan (2). However, due to the wind pressure of the cooling wind, the shutter (6) will be pushed open as shown in Fig. 4 against the elastic pressure, and the leaves and branches will open together with the cormorant (5). As a result, the cover (4) is prevented from being clogged into the cover (4) and cooling is insufficient, and the leaves and branches are prevented from burning on the cylinder (3) side as in the conventional case.

Also, at low engine speeds, the shutter (6) does not open due to weak wind pressure, but when cleaning the engine part, stop the rotation and open the shutter (6) manually from the outside to open the cover (4). It will be possible to scrape out leaves, branches, etc. inside) from the opening (5).

[Effect of the Invention] As described above, the present invention is a shutter that can be pushed open by the wind pressure of the cooling air into the opening (5) provided in the portion of the cover (4) that approaches the windward side near the cylinder (3). Since it is constructed by attaching (6), even if some of the cut leaves, branches, etc. are sucked into the cover (4) from the suction side of the cooling fan (2), the opening (5 ), It is possible to prevent the engine from burning due to insufficient cooling due to clogging in the cover (4) and burning of leaves, branches, etc. on the cylinder (3) side. In addition, if the shutter (6) is manually opened from the outside, the leaves, branches, etc. inside the cover (4) can be scraped out from the opening (5) and removed, and the shutter (6) is repressed. It has the feature that it can be suitably implemented with a compact structure that can be closed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an engine portion which is an embodiment of the present invention, FIG. 2 is an enlarged view of a part thereof, FIG. 3 is an outer side view of FIG.
FIG. 4 is an operation explanatory view shown in a part of FIG. 2, and FIG. 5 is a perspective view of the entire tea cutting machine. (1)… Output shaft (2)… Cooling fan (3)… Cylinder (4)… Cover (5)… Opening (6)… Shutter.

Claims (1)

[Scope of utility model registration request] 1. A cover (4) for guiding cooling air generated by a cooling fan (2) provided on an output shaft (1) to a cylinder (3) side.
In the engine part for a tea mower configured by being attached to the outer periphery of the cylinder (3), an opening (5) is formed at a portion of the cover (4) that approaches the windward side with respect to the outer periphery of the cylinder (3),
A dust remover characterized in that a shutter (6) which can be opened by the wind pressure of cooling air and elastically biases toward the closing side is openably and closably attached to the opening (5).