JPH035233Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a portable backpack-type branch cutter that is capable of changing the mounting direction of the motor output shaft and flexible shaft of a brush cutter, with the aim of improving work efficiency and durability. It is about improving things.

Taking a portable backpack-type pruning machine as an example, as shown in FIG. It is connected to the engine by a flexible shaft. gear case 5
When the throttle wire 7 is pulled by the throttle lever 8, the rotation speed of the cutter 4 is controlled.
Such a pruning machine can also be used as a brush cutter by replacing the blade 4 with a rotary brush cutting blade. Furthermore, as shown in the partially cutaway side view of FIG. 2 and the bottom view of FIG. 3, the flexible case 6 is easier to handle and less tiring during work when taken out from the lower part of the engine 3.

In conventional backpack-type working machines, the method for removing the flexible shaft from the output shaft of the engine 3 is inappropriate, resulting in problems such as poor workability and rattling. Therefore, in the present invention, this problem was solved by adopting a structure as shown below. Its structural feature is that the flexible shaft can be taken out in a direction different from the output shaft of the prime mover and is freely rotatable in a backpack-type working machine. A take-out direction changing device is provided at approximately the tip of the shaft, a case supported by a bearing section provided separately for the transmission shaft is provided rotatably around the transmission shaft, and the flexible shaft is connected to the prime mover from the case. It is located at a point taken out in a direction different from the output shaft.

Details of the clutch case 9 and direction change device 10 are shown in FIG. A transmission shaft 12 in the same direction as the output shaft 11 is mounted inside the clutch case 9, and
Moreover, a take-out direction changing device 10 is provided approximately at the tip thereof. The extraction direction converting device 10 includes an L-shaped case 13 that extends a transmission shaft 12 downward, and the lower end of the transmission shaft 12 is rotatably attached to the clutch case 9.
A bevel gear 15 is installed between the upper and lower parts of the inner shaft through bearings 14, 14, and a flexible case 6 is attached to the bevel gear 15.
The bevel gear 17 at the tip of the inner flexible shaft 16 is engaged. In this way, the tip of the flexible shaft 16 is connected to the bevel gear 17 within the L-shaped case 13, which is loosely inserted into the bearing part 19 provided at the lower part of the clutch case 9.

Conventionally, the transmission shaft 12 is supported only by the bearing 18 in the clutch case 9, and its tip ends with the attachment of the bevel gear 15, which is a structure that is extremely prone to play, but the present invention has a structure in which the transmission shaft 12 is supported only by the bearing 18 in the clutch case 9. Bearings 14, 14 are also provided in the L-shaped case 13 in the 10th section, and the extended transmission shaft 12 is made stronger by the bearings 14, 14 in the L-shaped case 13 and the bearings 18, 18 in the clutch case 9. I support it.

By configuring the backpack-type work machine as described above, workability such as mowing the grass by swinging it from side to side has been improved, and the machine has an excellent structure that does not cause rattling during use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the backpack-type pruning machine, FIG. 2 is a partially cutaway side view of the clutch case and direction changing device, and FIG. 3 is a bottom view of the same. 6... Flexible case, 9... Clutch case, 10... Direction changing device, 11... Output shaft,
12...Conduction shaft, 13...Case, 14, 18...
...Bearing, 15, 17...Bevel gear, 1
6...Flexible shaft, 19...Bearing section.

Claims (1)

[Scope of utility model registration request] When connecting the flexible shaft of the working machine to the output shaft of the prime mover attached to the backpack frame, the clutch case is used in a backpack-type working machine that allows the flexible shaft to be taken out in a direction different from the output shaft of the prime mover and is rotatable. A take-out direction changing device is installed at approximately the tip of the transmission shaft in the same direction as the output shaft, and the transmission shaft is connected to the case supported by a bearing provided separately for the transmission shaft. A backpack-type working machine, characterized in that the flexible shaft is rotatably provided at the center and taken out from the case in a direction different from the output shaft of the prime mover.