Walk-behind tiller

Abstract

To provide an ambulatory cultivation machine in which the surrounding of an engine mounted on a vehicle body frame is covered with a cover, in which the cover has versatility therefore, the cover can be used in common even when an engine to be mounted is changed.SOLUTION: An ambulatory cultivation machine comprises: a detachable hood cover 32 for covering an engine 2 mounted on a vehicle body frame 1; and a cultivation unit 40 for cultivating a farm field provided on a lower part of the vehicle body frame 1. A plurality of fitting hole parts 2a, 2b to which a fixing member for fitting the engine 2 to the vehicle body frame 1 is fitted, is provided on the engine 2, a turned U-shaped cover bracket 29 in front view on which, attachment hole parts 29a, 29b are formed on positions corresponding to the fitting hole parts 2a, 2b is attached to an upper part of the engine 2, and a hood cover 32 is attached to the cover bracket 29 through coupling hole parts 32a, 32b of the hood cover 32 continuous to the attachment hole parts 29a, 29b.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a walk-behind cultivator (walk-behind cultivator). [Background technology]

[0002] As described in Patent Document 1, for example, a walk-behind tiller has a tilling device attached to the bottom of a body equipped with an engine, and an operator holds a handle rod attached to the rear and upper part of the body to steer and perform tilling work. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-143977 A Summary of the Invention [Problem to be solved by the invention]

[0004] The walk-behind tiller shown in Patent Document 1, a prior art document, tills a field with tilling equipment that rotates using the driving force of an engine, and uses a ridge-making plate to form ridges while plowing. The engine, muffler, fuel tank, and transmission belt from the engine to the transmission case are all enclosed with their own covers to prevent dust from entering the engine.

[0005] However, these covers are designed to fit the shape of the engine and muffler, and when the engine or muffler is improved and its shape is changed, all of the covers must also be changed, resulting in high manufacturing costs.

[0006] Furthermore, in a configuration in which a cover is provided to fit the engine and muffler, there is a problem that if there is an assembly error when the engine is disassembled and reassembled for an overhaul, or if there is a slight change in the dimensions due to deterioration over time, the cover may become loose and come off during operation, or dust may get inside and cause a malfunction.

[0007] To provide a walk-behind cultivator in which an engine mounted on a body frame is covered with a cover, the cover being versatile so that the cover can be commonly used even if the mounted engine is changed. [Means for solving the problem]

[0008] The above object of the present invention can be achieved by the following technical means.

[0009] The first aspect of the present invention is a walk-behind tiller having a removable hood cover (32) for covering an engine (2) mounted on a vehicle body frame (1) and a tilling implement (40) for tilling a field below the vehicle body frame (1), a cover bracket (29) having a U-shape in a front view and having mounting holes (29a, 29b) formed at positions corresponding to the mounting holes (2a, 2b) is attached to an upper portion of the engine (2); and a hood cover (32) is attached to the cover bracket (29) through connecting holes (32a, 32b) of the hood cover (32) connected to the mounting holes (29a, 29b); This walk-behind tiller is characterized in that the base of a fuel tank stay (33) supporting a fuel tank (30) is attached to a cover bracket (29), and the rear upper part of the fuel tank stay (33) and the upper part of the fuel tank (30) are connected via a tray (34) that guides fuel spilled from the fuel tank's oil filler port (30c) to the rear. The second aspect of the present invention is a walk-behind tiller having a removable hood cover (32) for covering an engine (2) mounted on a vehicle body frame (1) and a tilling implement (40) for tilling a field below the vehicle body frame (1), a cover bracket (29) having a U-shape in a front view and having mounting holes (29a, 29b) formed at positions corresponding to the mounting holes (2a, 2b) is attached to an upper portion of the engine (2); and a hood cover (32) is attached to the cover bracket (29) through connecting holes (32a, 32b) of the hood cover (32) connected to the mounting holes (29a, 29b); A muffler cover (36) is provided to cover a muffler (31) through which exhaust gas generated by the operation of the engine (2) is discharged. A muffler cover stay (37) to which the muffler cover (36) is attached is attached to a cover bracket (29) in accordance with the position of the muffler (31). This walk-behind tiller is characterized in that the base of a fuel tank stay (33) supporting a fuel tank (30) is attached to a cover bracket (29), and the rear upper part of the fuel tank stay (33) and the upper part of the fuel tank (30) are connected via a tray (34) that guides fuel spilled from the fuel tank's oil filler port (30c) to the rear. The first invention related to the present invention The walk-behind tiller is provided with a removable hood cover (32) that covers an engine (2) mounted on a body frame (1), and a tilling device (40) for tilling a field is provided on the lower part of the body frame (1), characterized in that the engine (2) is provided with a plurality of mounting holes (2a, 2b) for attaching fixing members for mounting the engine (2) to the body frame (1), a cover bracket (29) having a U-shape when viewed from the front and having mounting holes (29a, 29b) formed at positions corresponding to the mounting holes (2a, 2b) is attached to the upper part of the engine (2), and the hood cover (32) is attached to the cover bracket (29) through connecting holes (32a, 32b) of the hood cover (32) that are connected to the mounting holes (29a, 29b).

[0010] The second invention related to the present invention The present invention is characterized in that a muffler cover (36) is provided to cover a muffler (31) through which exhaust gas generated by the operation of an engine (2) is discharged, and a muffler cover stay (37) for mounting the muffler cover (36) is attached to a cover bracket (29) in accordance with the position of the muffler (31). The first invention related to the present invention It is a walk-behind tiller.

[0011] The third invention related to the present invention The fuel tank stay (33) supporting the fuel tank (30) has its base attached to a cover bracket (29), and the rear upper portion of the fuel tank stay (33) and the upper portion of the fuel tank (30) are connected via a receiver (34) that guides fuel spilled from the fuel tank's filler port (30c) to the rear. The first or second invention related to the present invention It is a walk-behind tiller.

[0012] The fourth invention related to the present invention The cover bracket (29) is characterized in that it is composed of a flat upper plate (29u) and side plates (29s) which are bent at the left and right sides of the upper plate (29u) to form mounting holes. Any one of the first to third inventions related to the present invention It is a walk-behind tiller.

[0013] Fifth Invention Related to the Present Invention The present invention is characterized in that the driving force is transmitted from an engine (2) to a transmission case (3) that drives a tilling implement (40) by a transmission belt (52), and that the transmission belt holding member (42) is formed with mounting elongated holes (45a, 45b) through which a fixing member is passed when the transmission belt holding member (42) is attached to the engine (2), and an arc-shaped hole portion (45c) that serves as a guide for mounting. Any of the first to fourth inventions related to the present invention It is a walk-behind tiller. Effect of the Invention

[0014] According to the present invention, by attaching a cover bracket (29) to the engine (2) and then fitting a hood cover (32) to this cover bracket (29), when a different type of engine (2) is mounted on the body frame (1), the cover bracket (29) corresponding to that engine (2) can first be attached to the engine (2) and then a conventional hood cover (32) can be attached to cover the upper part of the engine (2), thereby enabling common use without changing the hood cover (32). In addition, by inserting a positioning rod into one of the connecting holes (32a, 32b) of the hood cover (32) that are connected to the mounting holes (29a, 29b) of the cover bracket (29) and then fixing the hood cover (32) with bolts in sequence, the hood cover (32) can be attached to an accurate position on the engine (2), and the installation work can be performed efficiently. In the present invention, the fuel tank (30) is connected to the cover bracket (29) by the fuel tank stay (33), so that the fuel tank (30) can be supported more firmly and prevented from falling off. Even if fuel is accidentally poured into the fuel filler hole, the drip tray (34) guides the fuel to flow out to the rear side of the fuel tank (30), so that the fuel is prevented from coming into contact with the hot engine (2), igniting and burning the aircraft. The first invention related to the present invention By attaching the cover bracket (29) to the engine (2) and then fitting the hood cover (32) to the cover bracket (29), when a different type of engine (2) is mounted on the body frame (1), the cover bracket (29) corresponding to that engine (2) can first be attached to the engine (2) and then the conventional hood cover (32) can be attached to cover the upper part of the engine (2), thereby enabling common use without changing the hood cover (32).

[0015] In addition, by inserting a positioning rod into one of the connecting holes (32a, 32b) of the hood cover (32) that are connected to the mounting holes (29a, 29b) of the cover bracket (29) and then fixing the hood cover (32) with bolts in sequence, the hood cover (32) can be attached to an accurate position on the engine (2), and the installation work can be performed efficiently.

[0016] The second invention related to the present invention By appropriately changing the position at which the muffler cover stay (37) is attached to the cover bracket (29), the muffler cover (36) can be positioned in an appropriate position according to the position of the muffler (31) depending on the engine (2).

[0017] The third invention related to the present invention By connecting the fuel tank (30) to the cover bracket (29) with the fuel tank stay (33), the fuel tank (30) can be supported more firmly and prevented from falling off. Also, even if fuel is accidentally poured into the filler hole, the drip tray (34) guides the fuel out to the rear side of the fuel tank (30), preventing the fuel from coming into contact with the hot engine (2) and igniting, which would cause damage to the aircraft.

[0018] The fourth invention related to the present invention By configuring the cover bracket (29) with the upper plate (29u) and the side plates (29s) bent on the left and right sides thereof, it is possible to prevent the complexity of the cut-out shape and the increase in labor required for bending, thereby improving productivity and reducing manufacturing costs.

[0019] Fifth Invention Related to the Present Invention Since the arc-shaped hole portion (45c), which serves as a guide for installing the transmission belt holding member (42), is formed in the transmission belt holding member (42), which is an endless belt holding member, the transmission belt holding member (42) can be easily attached to the engine (2) in a position suitable for holding the transmission belt (52). This reduces the time required for the installation work and prevents the work from being interrupted due to the transmission belt (52) falling off. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a right side view of a walk-behind cultivator equipped with a ridge forming tool according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a right side view of the mounting portion of the ridger of the walk-behind tiller according to the embodiment of the present invention. [Diagram 3] 1 is a right side view of a walk-behind cultivator equipped with a resistance bar according to an embodiment of the present invention; [Figure 4] 1 is a plan view of an engine of a walk-behind tiller according to an embodiment of the present invention with a hood cover removed. FIG. [Diagram 5] FIG. 2 is a right side view of an upper part of the engine of the walk-behind tiller according to the embodiment of the present invention. [Figure 6] FIG. 2 is a plan view of the engine of the walk-behind tiller according to the embodiment of the present invention. [Figure 7] FIG. 2 is a right side view of a drive pulley mounting portion of an engine of the walk-behind tiller according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described using a walking tiller as shown in the drawings. In this specification, the left and right directions in the forward direction of the machine body are referred to as left and right, respectively, and the forward direction is referred to as front, and the backward direction is referred to as rear.

[0022] First, the vehicle body frame 1 has an engine 2 mounted at the front, a transmission case 3 and a rear frame 8 connected behind it, and an engine output shaft and a transmission input shaft provided on the left side of the engine 2 and the transmission case 3 are connected so as to be capable of transmitting power via a belt transmission mechanism 4. The belt transmission mechanism 4 is provided with a tension clutch 24, which can be turned on and off by a clutch lever 22 provided on a grip portion 14a of a handle arm 14 described later.

[0023] A transmission case 7 is attached to the right side of the transmission case 3 facing downward toward the body frame 1, and a work shaft 6 protrudes in the left-right direction from the lower part of the transmission case 7, and the rotation of the output shaft of the transmission case 3 is transmitted to the work shaft 6 by an internal chain transmission. Cultivation tines 5 are attached to the work shaft 6.

[0024] A lower handle bar 10 is attached to a rear frame 8 at the rear end of the body frame 1 so as to face rearward and upward, and a hitch 9 is also attached so as to face rearward.

[0025] A handle arm 14 which spreads out to the left and right in a V-shape toward the rear in a plan view is attached to the upper end of the lower handle rod 10 which rises upward and to the rear and can be rotatably fixed with a knob 13, allowing the operator to adjust the height of the grip portion 14a above the ground to his or her liking. The handle arm 14 is also bent downward from the lower handle rod 10 at the knob 13, so that the tip of the grip portion 14a and the tiller tines 5 can support and raise the wheel 18 attached to the hitch 9 to prevent the machine from tipping over.

[0026] As shown in Figure 2, the hitch 9 is composed of plate bodies 9c, 9c that sandwich a vertical support pipe 11 from the rear frame 8 from the left and right, and two adjustment holes 9b1, 9b2 are provided at the top and bottom of the support pipe 11 to form the resistance rod support part 9b, and a locking pin 9a1 protruding to the left and right sides of the plate bodies 9c, 9c and two locking holes 9a2, 9a3 that pass through the plate bodies 9c, 9c to form the ridge builder support part 9a.

[0027] As shown in FIG. 3, the resistance rod 16 is a single rod-shaped body consisting of a resistance rod portion 16a, which is inserted into the ground during plowing work, and a wheel mounting portion 16b, to which wheels 18 are attached, connected by a diagonal connecting portion 16c. A mounting hole 16a1 is provided in the resistance rod portion 16a, and a mounting hole is also provided in the wheel mounting portion 16b.

[0028] 4, 5 and 6 show the upper part of the engine 2, and a cover bracket 29 formed in a U-shape with an upper plate 29u on the upper side and side plates 29s, 29s on the left and right sides when viewed from the front is attached to the engine 2. Two mounting holes 29a, 29b are provided on the left and right sides of the upper plate 29u of this cover bracket 29, and are fixed to the body frame 1 with mounting bolts (fixing members) that pass through the mounting holes 2a, 2b of the engine 2, and the side plates 29s, 29s are fixed to the head of the engine 2 with bolts 38.

[0029] A fuel tank stay 33 is attached to the rear side of the cover bracket 29, and the fuel tank 30 is attached to its rear end. A dish-shaped receiver 34 is provided around the oil filler port 30c of the fuel tank 30 to allow any oil that spills during refueling to flow to the rear of the aircraft and prevent it from getting on the engine 2.

[0030] Additionally, a muffler cover 36 is attached to the left side plate 29s of the cover bracket 29 by a muffler cover stay 37, located above the muffler 31. The muffler cover stay 37 is attached by welding in accordance with the position of the muffler 31 of the engine 2 to be mounted.

[0031] Hood cover 32 is attached to cover cover bracket 29 and fuel tank stay 33. Hood cover 32 is provided with connecting holes 32a, 32b that match mounting holes 29a, 29b of cover bracket 29. After positioning hood cover 32 by passing a guide rod through mounting hole 29a and connecting hole 32a on one side, hood cover 32 is attached to cover bracket 29 with bolts.

[0032] FIG. 9 is a side view showing a drive pulley 51 attached to an output shaft 50 of the engine 2, and shows a transmission belt holding member 42 that prevents the transmission belt 52 wound around the drive pulley 51 from coming off. This transmission belt holding member 42 is provided with two long mounting holes 45a, 45b and an arc-shaped hole portion 45c, and the mounting position on the engine 2 is viewed through the arc-shaped hole portion 45c, and mounting bolts are passed through the long mounting holes 45a, 45b to fix the member in place. [Explanation of symbols]

[0033] 1 Body frame 2 Engine 3. Transmission case 2a, 2b Mounting hole 29 Cover bracket 29a, 29b Mounting hole 29u Top Plate 29s side plate 30 Fuel Tank 30c oil filler port 31 Muffler 32 Food Cover 32a, 32b connection hole 33 Fuel tank stay 34 Saucer 36 Muffler cover 37 Muffler cover stay 40 Tillage equipment 45 Transmission belt retaining member 45a Mounting slot 45b Guide hole

Claims

1. A walk-behind tiller having a removable hood cover (32) that covers an engine (2) mounted on a vehicle frame (1) and a tilling device (40) for tilling a field attached to a lower portion of the vehicle frame (1), a cover bracket (29) having a U-shape in a front view and having mounting holes (29a, 29b) formed at positions corresponding to the mounting holes (2a, 2b) is attached to an upper portion of the engine (2); and a hood cover (32) is attached to the cover bracket (29) through connecting holes (32a, 32b) of the hood cover (32) connected to the mounting holes (29a, 29b); This walk-behind cultivator is characterized in that the base of a fuel tank stay (33) supporting a fuel tank (30) is attached to a cover bracket (29), and the rear upper part of the fuel tank stay (33) and the upper part of the fuel tank (30) are connected via a tray (34) for guiding fuel spilled from the fuel tank's oil filler port (30c) to the rear.

2. A walk-behind tiller having a removable hood cover (32) that covers an engine (2) mounted on a vehicle frame (1) and a tilling device (40) for tilling a field attached to a lower portion of the vehicle frame (1), a cover bracket (29) having a U-shape in a front view and having mounting holes (29a, 29b) formed at positions corresponding to the mounting holes (2a, 2b) is attached to an upper portion of the engine (2); and a hood cover (32) is attached to the cover bracket (29) through connecting holes (32a, 32b) of the hood cover (32) connected to the mounting holes (29a, 29b); A muffler cover (36) is provided to cover a muffler (31) through which exhaust gas generated by the operation of the engine (2) is discharged, and a muffler cover stay (37) for mounting the muffler cover (36) is attached to a cover bracket (29) in accordance with the position of the muffler (31); This walk-behind cultivator is characterized in that the base of a fuel tank stay (33) supporting a fuel tank (30) is attached to a cover bracket (29), and the rear upper part of the fuel tank stay (33) and the upper part of the fuel tank (30) are connected via a tray (34) for guiding fuel spilled from the fuel tank's oil filler port (30c) to the rear.

Images