JP2019149940A - Ambulatory control machine - Google Patents

Abstract

To suppress size of a diameter of an input pulley attached to an input shaft of a transmission case.SOLUTION: A deceleration device 33 for decelerating rotation of a crank shaft is provided on a crank case 16 side part of an engine E, a transmission belt 32 is wound between an output pulley 20 which is attached to an output shaft 20a of the deceleration device 33 which decelerated rotation of the crank shaft and the input pulley 21 attached to the input shaft 21a of the transmission case 1, and the output pulley 20, the input pulley 21 and the transmission belt 32 are covered with a belt cover 19, and a belt rear cover 24 is provided between the deceleration device 33 and the transmission belt 32, and a gap coating cover 23 for covering a space between the belt rear cover 24 and the machine body side, in plan view, is provided.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a walking management machine in which an operator performs farming work such as tillage while walking.

In order to simplify the configuration of the walking-type management machine, a transmission case with an axle for mounting wheels and an engine base with an engine are integrally connected to each other, and the transmission case is connected to the crankshaft, which is the engine output shaft. The power transmission to the input shaft is composed of a belt transmission mechanism.
The rotational power of the crankshaft with a high rotational speed is reduced to a low rotational speed in the transmission case and transmitted to the axle. However, since the deceleration in the transmission case is limited, it is necessary to increase the reduction ratio in the belt transmission mechanism. is there.

JP-A-2006-149985

In the prior art, the diameter of the input pulley attached to the input shaft of the mission case is larger than the diameter of the output pulley attached to the engine output shaft. For this reason, the maintenance around the input shaft is troublesome.
The present invention is to solve such problems.

  The problems of the present invention are solved by the following technical means.

  The invention of claim 1 includes an engine (E), a pair of left and right traveling wheels (3L, 3R), a handle (9) extending left and right from the front to the rear, and a driving force from the engine (E). In a walking type management machine equipped with a transmission case (1) equipped with a transmission mechanism for transmitting the power to the traveling wheels (3L, 3R), the rotation of the crankshaft is decelerated on the side of the crankcase (16) of the engine (E). An output pulley (20) attached to an output shaft (20a) of the speed reducer (33) that has reduced the rotation of the crankshaft, and an input shaft (21a) of the transmission case (1) A transmission belt (32) is wound around the input pulley (21) attached to the belt, and the output pulley (20), the input pulley (21), and the transmission belt (32) are connected to a belt cover (19). A belt back cover (24) is provided between the speed reducer (33) and the transmission belt (32) so as to cover and cover the gap between the belt back cover (24) and the body side in plan view (23). A walk-type management machine characterized by the provision of

According to a second aspect of the present invention, a rear cover (44) is connected to a rear portion of the gap cover cover (23), and the rear cover (44) is formed by forming an arcuate shape behind the input pulley (21) to the left. The walking-type management machine according to claim 1, wherein the walking-type management machine is configured to extend to the vicinity of the traveling wheel (3L).
The invention according to claim 3 is characterized in that a left fender (3La) is provided between the left traveling wheel (3L) and an end (44a) of the rear cover (44). A walk-type management machine.

  According to the first aspect of the present invention, since the speed reducing device 33 that decelerates the rotation of the crankshaft is provided, the diameter of the input pulley 21 can be suppressed from increasing. Further, it is possible to protect the devices between the machine body and the belt back cover 24 and to prevent the devices from being inadvertently touched.

  The inventions according to claims 2 and 3 can protect the devices between the airframe and the belt back cover 24 from below the airframe and can prevent the devices from being inadvertently touched.

It is a right view of a walking type management machine. It is a top view of a walk type management machine. It is a partial enlarged plan view. It is a part of the enlarged right side.

  Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings. In the description of the embodiments, the left and right directions are referred to as left and right, respectively, and the forward direction is referred to as the forward direction and the backward direction is referred to as the rear direction, but the configuration of the present invention is not limited.

  In the walking type management machine of the present invention, left and right axles 2 and 2 are mounted on the lower part of a mission case 1 which is the center of the fuselage, and left and right traveling wheels 3L and 3R are attached to the left and right axles 2 and 2 protruding left and right Is configured.

  An input pulley 21 is attached to an input shaft 21 a that is above the left axle 2 and protrudes to the left of the mission case 1. On the other hand, the engine E is mounted on the engine base 15 that is attached to the front portion of the transmission case 1 and protrudes to the front side, and the speed reducer 33 is provided in the crankcase 16 of the engine E. The output pulley 20 is attached to. A transmission belt 32 is wound around the input pulley 21 and the output pulley 20 so that the power transmission can be turned on and off by the belt tension pulley 25.

  A front hitch 15a is provided at the front portion of the engine base 15 so that various working machines can be mounted.

  The output shaft 20a on the engine E side is configured to output the rotation reduced in the reduction gear 33 attached to the crankcase 16 of the engine E.

Thereby, it can suppress that the diameter of the input pulley 21 becomes large.
The handle base 7 attached to the upper part of the mission case 1 is configured so that the handle base 8 is horizontally rotated around the vertical axis 8a and can be fixed at an arbitrary position. Reference numeral 8b denotes a handle rotating lever for rotating and fixing the handle base 8.
The handle base 8 is provided with left and right handle bars 9L and 9R that branch left and right obliquely upward. The left and right side clutch levers 12L and 12R are provided at the lower rear ends of the left and right handlebars 9L and 9R. When the left and right side clutch levers 12L and 12R are gripped, the left and right side clutches in the transmission case 1 are disengaged.
On the upper side of the left handle bar 9L, there is provided a clutch lever 11 that moves a belt tension pulley 25 that tensions or loosens the transmission belt 32 wound around the output pulley 20 and the input pulley 21 to turn the transmission on and off. The clutch lever 11 is configured to be operated by grasping with the left hand.
On the other hand, a finger lever 13 that is operated with the thumb of the left hand in a state where the grip part 9La of the left handle bar 9L is gripped with the left hand is provided. The finger lever 13 operates in the same manner as the clutch lever 11. That is, when the finger lever 13 is pushed down with the thumb, the belt tension pulley 25 moves to tension the transmission belt 32, and the transmission is turned on. Further, when the finger lever 13 is pushed up with the thumb and returned to the original position, the belt tension pulley 25 moves to loosen the transmission belt 32, and the transmission is cut off.
The left handle bar 9L and the right handle bar 9R are connected and fixed by a connecting rod 9A. A handle up / down lever 9B is provided near the connecting portion between the right handle bar 9R and the connecting rod 9A. When the handle up / down lever 9B is gripped with the right hand, the left handle 杆 9L and the right handle 杆 9R rotate around the horizontal axis 9C, and the left and right grips of the left handle 杆 9L and the right handle 杆 9R The configuration is such that the vertical positions of 9La and 9Ra are adjusted.
A rotary clutch lever RC is provided on the front side of the grip portion 9Ra of the right handle bar 9R. A hitch 10 is attached to the rear part of the transmission case 1 near the upper and lower middle, and a rotary work lever (not shown) connected to the hitch 10 is turned on and off by the rotary clutch lever RC. Further, the hitch 10 is configured so that various working machines such as a plow, a vertical stand, a trailer, and the like can be attached.
An emergency stop bar EL is provided at the center of the left handle bar 9L and the right handle bar 9R and in the vicinity of the front part of the left and right grips 9La, 9Ra. When the emergency stop bar EL is pushed downward, the belt tension pulley 25 moves to loosen the transmission belt 32, and the transmission is cut off. Although the emergency stop bar EL may be intentionally pushed down to stop, the emergency stop bar EL is pushed down in contact with the operation even if the aircraft unexpectedly moves backward due to an operation mistake or the like, and the aircraft stops. .

  On the left side of the handle base 8, a transmission lever 6 is provided to extend rearward and upward from the transmission unit 5 of the transmission case 1. Reference numeral 14 denotes an engine start / stop switch. Reference numeral 14a denotes an engine speed adjusting lever.

  3 and 4, the power transmission configuration from the engine E to the transmission case 1 will be described in detail. The rotational power of the crankshaft of the engine E is input to the speed reducer 33, and the rotational power decelerated by the speed reducer 33 is output from the output shaft 20a. A belt cover 19 covers the two transmission belts 32, 32 wound around the output pulley 20 attached to the output shaft 20 a and the input pulley 21 attached to the input shaft 21 a of the transmission case 1.

  A belt back cover 24 is provided on the body side of the two transmission belts 32, 32. The belt back cover 24 is provided between the speed reducer 33 and the transmission belt 32. Since there is a gap behind the machine body of the speed reducer 33, the gap cover 23 is attached to the belt back cover 24 by welding to cover the gap from above.

Thereby, while being able to protect the apparatus between an airframe and the belt back cover 24, it can prevent touching these apparatuses carelessly.
The belt back cover 24 and the gap cover cover 23 are attached to the side surface of the engine E and the side surface of the transmission case 1 with bolts. For this reason, the machine body side of the gap covering cover 23 is bent downward (L-shaped) to form a bolt through hole.
Further, belt guides 27a, 27b, and 27c that guide the outer peripheral surface of the transmission belt 32 so as not to be detached when the transmission belt 32 is bent by loosening the pressure contact of the belt tension pulley 25 to the belt back cover 24 are arranged outside the belt line. It is attached to.
The plate flat portion of the belt back cover 24 serves as a reference for adjusting the axial position so that the side surfaces of the output pulley 20 and the input pulley 21 are aligned, and the line of the transmission belt 32 can be made appropriate.
The upper mounting stay 22 integrated with the belt cover 19 is bent downward so as to be aligned with the line of the gap covering cover 23, and the upper mounting stay 22 is attached to the gap covering cover 23 with a bolt B1. The front side of the belt cover 19 is attached to the reduction gear 33 with bolts 19a, and the rear side of the belt cover 19 is attached to the transmission case 1 with bolts 19b.

The upper mounting stay 22 is provided with an accelerator cable clamp, and an accelerator cable (not shown) is fastened by this clamp. A rear cover 44 that surrounds the input shaft 21 a and the rear of the brake drum 36 is attached to the gap cover cover 23.
The upper part of the left traveling wheel 3L is covered with the left fender 3La, but the end 44a of the rear cover 44 extends to the vicinity of the left fender 3La or the lower end 6a of the speed change lever 6. Thereby, even if it is going to put a finger carelessly, it can prevent that the fingertip contacts the rotating part.
Since the upper part of the brake drum 36 is not covered with the gap cover 23, the second gap cover 23 a is provided on the gap cover 23. Thereby, even if it is going to insert a finger carelessly from the upper body, it can prevent that the fingertip contacts the rotating part.
An L-shaped clutch cable outer receiver 34 is provided in the gap cover 23 so that the clutch cable 38 passes through the gap cover 23, and a hole and a notch are provided in the clutch cable outer receiver 34. Is easily put on the clutch cable outer holder 34.
As a result, the clutch cable 38 can be routed straight without being bent when exiting the handle bracket HB, so that resistance due to bending of the clutch cable 38 is reduced, and the operation load of the clutch can be reduced.

  Further, the tension arm 25a provided with the belt tension pulley 25 is provided so as to be positioned below the clearance cover 23 from the rotation fulcrum 25b on the machine body side, and a hole for applying the tension spring 25c to the tension arm 25a is provided. Provided.

As shown in FIG. 4, the output shaft 20 a projecting laterally from the speed reducer 33 and the input shaft 21 a projecting laterally through the brake drum 36 of the transmission case 1 pass through the holes provided in the belt back cover 24. It protrudes to the side.
The input pulley 21 is positioned with a bolt via a space sleeve 35 with respect to the input shaft 21 a and fixed with a bolt 39. Further, the output pulley 20 is positioned with a screw with respect to the output shaft 20 a and fixed with a bolt 39. Further, since the belt back cover 24 is fixed to the engine E and the transmission case 1 with bolts, the belt line of the transmission belt 32 is accurately determined along the belt back cover 24.

  Although not shown in the drawings, the belt back cover 24 is provided with an arc hole through which the tension arm 25a of the belt tension pulley 25 is passed, and the belt tension pulley 25 is attached to the belt cover at the tension cut position by restricting the moving range of the belt tension pulley 25. It is configured not to hit 19.

  A muffler 45 is provided on the left side of the engine E. On the lower side of the muffler 45, the front muffler mounting bolt 45a and the rear muffler mounting bolt 45b are used. In the configuration of this embodiment, even if the belt cover 19 is removed, the front muffler mounting bolt 45a and the rear muffler mounting bolt 45b cannot be attached or detached. That is, the belt back cover 24 exists below the front muffler mounting bolt 45a and the rear muffler mounting bolt 45b.

  Therefore, a notch is formed in the belt back cover 24 at a portion corresponding to the lower side of the front muffler mounting bolt 45a and the rear muffler mounting bolt 45b. As a result, it is possible to attach and detach the front muffler mounting bolt 45a and the rear muffler mounting bolt 45 by inserting a tool into the notch.

  The fuel tank 40 provided in the upper part of the engine E is configured to open the upper part of the engine E by raising the rear side of the fuel tank 40 upward with the pivot shaft 42 provided in the support stay 41 as a pivot point. ing. An air filter 43 is provided on the right side of the engine E.

  Although not shown in the drawings, a PTO output shaft that protrudes to the right of the mission case 1 is provided, and a counter chain case is mounted between the input shaft of the work machine to be mounted on the hitch 10 and power is transmitted to the work machine. It is said. In the counter chain case, a sprocket connected to the PTO output shaft and a sprocket connected to the input shaft on the work machine side are configured, and a power is transmitted to the work machine with a chain wound between the two sprockets. It is carried out.

E Engine 1 Transmission case 2 Axle 3L, 3R Traveling wheel 3La Left fender 9 Handle 16 Crankcase 19 Belt cover 20 Output pulley 20a Output shaft 21 Input pulley 21a Input shaft 23 Clearance cover 24 Belt back cover 27a, 27b, 27c Belt guide 32 Transmission belt 33 Reduction gear 44 Rear cover 44a End of rear cover

Claims (3)

  An engine (E), a pair of left and right traveling wheels (3L, 3R), a handle (9) extending from left to right from the front to the rear, and driving force from the engine (E) to the traveling wheels (3L, 3R) In the walking type management machine provided with the transmission case (1) having a transmission mechanism that transmits the transmission mechanism, a reduction device (33) for reducing the rotation of the crankshaft is provided on the side of the crankcase (16) of the engine (E). An output pulley (20) attached to the output shaft (20a) of the speed reducer (33) that has been provided and decelerated the rotation of the crankshaft, and an input pulley (21) attached to the input shaft (21a) of the transmission case (1) And the output pulley (20), the input pulley (21) and the transmission belt (32) are covered with a belt cover (19) and A belt back cover (24) is provided between the speed device (33) and the transmission belt (32), and a gap cover cover (23) is provided to cover the space between the belt back cover (24) and the machine body in plan view. This is a walking type management machine.   A rear cover (44) is connected to the rear portion of the gap cover cover (23), and the rear cover (44) is formed in an arc shape behind the input pulley (21) so as to be close to the left traveling wheel (3L). The walking type management machine according to claim 1, wherein the walking type management machine is configured to extend up to a distance.   The walking type management machine according to claim 2, wherein a left fender (3La) is provided between the left traveling wheel (3L) and an end (44a) of the rear cover (44).

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