JP2001292682A - Self-propelled type boom sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems that a self-propelled type boom sprayer loaded with a power spraying device in the upper part of a machine body frame is deficient in stability of the machine body. SOLUTION: This self-propelled type boom sprayer is composed by supporting the power spraying device 36 on subframes 52L and 52R arranged and directed from the rear ends of machine body frames 6L and 6R toward the rear and locating the top of a crank case 26 in a position at a lower level than that of the tops of the machine body frames 6L and 6R and providing the subframe 52R so that the top of the subframe 52R is located in a position at a lower level than that of the lower ends of the machine body subframes 6L and 6R.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement of a power spray device of a self-propelled boom sprayer having a boom provided with a nozzle on a traveling body and a power spray device.

[0002]

2. Description of the Related Art Conventionally, as a self-propelled boom sprayer for performing a chemical spraying operation, a power sprayer is provided on a four-wheeled traveling body, and a boom is disposed in a front or rear part of the traveling body in a left-right direction. The power spraying device is driven by the power of, and the chemical liquid is pressure-fed to a nozzle arranged on the boom to perform a controlling operation.

[0003]

In the case of the above-described four-wheeled boom sprayer, a pair of left and right body frames are arranged in the front-rear direction, and an engine, a power spray device, a chemical liquid tank and the like are arranged on the body frame. As a result, the position of the center of gravity was raised, and running stability was deteriorated. In addition, if the power spray device and engine are placed lower than the body frame, the minimum ground clearance will be low, and when performing pest control work, the bottom of the power spray device and engine will hit the leaf tip and damage the leaf tip. Was.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, in a self-propelled boom sprayer in which an engine is mounted on an airframe of a traveling airframe and a power spray device driven by the engine is disposed at one end of the airframe, a crankcase of the power spray device is provided. Is located below the substantially upper end of the body frame.

According to a second aspect of the present invention, in a self-propelled boom sprayer in which an engine is mounted on a body frame of a traveling body and a power spraying device driven by the engine is disposed at one end of the body frame, a crankcase includes a body. It is supported by a subframe extending rearward from the rear end of the frame.

According to a third aspect of the present invention, at least one of the sub-frames is located below a body frame.

[0007]

Next, embodiments of the present invention will be described.
1 is an overall side view of the boom sprayer, FIG. 2 is an overall plan view of the boom sprayer, FIG. 3 is a side view showing the power spray device, FIG. 4 is a rear view showing the power spray device, 5 is a plan view showing the power spray device, FIG. 6 is a piping diagram of the power spray device, and FIG.
It is a drive transmission block diagram from a TO shaft to a dynamic injection drive case.

In FIGS. 1 and 2, the boom sprayer, which is a traveling work vehicle for performing a control operation, includes a riding type traveling machine body 22, a spraying device 35 and a power spraying device 36 related to chemical liquid spraying. The spraying device 35 includes the traveling body 22.
And the power spray device 36 is disposed at the rear. A pair of right and left body frames 6L and 6R extend in parallel from the front end of the traveling body 22 toward the rear of the body. The front wheels 7 are located below the front of the body frames 6L and 6R.
7 is supported, and rear wheels 8.8 are supported below the rear. A hood 10 that covers the engine 80 is provided on the body frames 6L and 6R at the front of the body. An operation panel 11 is provided on an operation column behind the hood 10, and an operation handle 12 is provided above the operation panel. A step 13 is provided on the body frames 6L and 6R from the lower side of the operation panel 11 toward the rear. A chemical solution tank 24 is disposed on the rear of the body frames 6L and 6R, and a driver's seat 14 is formed at the front center of the chemical solution tank 24, and the side and rear portions are surrounded by the chemical solution tank 24. It is mounted as follows.

The spraying device 35 includes a boom 40 for spraying a chemical solution.
And an elevating link mechanism 37. The boom 4
Reference numeral 0 denotes a front boom 41 in front of the traveling body 22 and left and right side booms 42L and 42R pivotally supported at both ends of the front boom 41 and foldably extended to the side. The boom 40 is provided with a plurality of nozzles 23 for spraying a chemical solution at regular intervals.
Cylinders 43 are interposed between the front boom 41 and the side booms 42L and 42R, respectively.
The 2L / 42R is rotatable between a working position extending horizontally in the left-right direction and a storage position positioned rearward and upward in the front-rear direction.

The elevating link mechanism 37 connects the front boom 41 and the front portions of the body frames 6L and 6R by parallel links, and interposes cylinders 38 between one of the parallel links and the body frame 6. And the cylinder 38.3
The boom 40 can be moved up and down by expanding and contracting the boom 8. The left and right centers of the front boom 41 are pivotally supported with respect to the elevating link mechanism 37 and supported so as to be tiltable left and right. A cylinder 39 is interposed between the front boom 41 and the elevating link mechanism 37, and the boom 40 is moved. It is configured to perform horizontal control.

Next, the power spray device 36 will be described. As shown in FIG. 3, FIG. 4, and FIG.
Is composed of a crankcase 26, a filter 44, an accumulator 25, a flow control valve 27, a motor 30 related to the flow control valve 27, and the like. The plunger is housed in the crankcase 26, and the driving force from the PTO shaft 17 projecting rearward of the traveling body 22 rotates the crankshaft to reciprocate the plunger so that the chemical solution can be pumped. .

The power spraying device 36 is supported by a plate 50L at the rear end of the body frame 6L and a plate 50R at the rear end of the body frame 6R.
· It is fastened and fixed by 51 ... The plates 50L and 50R have subframes 52L and 50L, respectively.
52R is fixed by welding.
The 2R extends rearward.

The plates 50L and 50R have the same mounting position at the upper end, while the plate 50R extends below the plate 50L.
R is fixed to the lower end of the plate 50R,
It is arranged at a position lower than 2L. In other words, the subframes 52L and 52R are the body frames 6L and 6L in plan view.
The sub-frame 52L is disposed on the extension of the body frame 6L, and is disposed vertically above and below the sub-frame 52L at a lower position than the sub-frame 52L. -ing

A bridge member 53 having a U-shape in a plan view and an L-shape in a front view is disposed at an intermediate portion in the front-rear direction of the sub-frames 52L and 52R.
A bridge is connected between R. The bridging member 53 is formed by bending a rod-shaped member, and ends 53a and 53a are located on the left and an intermediate portion 53b is located on the right. The ends 53a and 53a are fixed to the sub-frame 52L by welding, and the intermediate portion 53b is fixed to the sub-frame 52R by welding.
52R are connected.

The crankcase 26 includes a support plate 5
4, and is mounted on the bridge member 53 via a bridge 4, and is fastened and fixed to the bridge member 53 from below by bolts (not shown). The crankcase 26 is arranged so as to overlap with both of the sub-frames 52L and 52R in a side view, and is configured to protect against an obstacle from the side. The upper end position of the crankcase 26 is located lower than the upper end of the body frames 6L and 6R, and the lower end position is the subframe 52R.
The crankcase 26 is positioned above the lower end so that the minimum ground clearance does not decrease, and the crankcase 26 is protected by the subframes 52L and 52R as a whole.

Next, components of the power spray device 36 will be described. Filter 4 is located on the right of subframe 52R.
4 is provided, and at the front of the filter 44, a chemical solution inlet 55 is opened to the left. Chemical tank 2
4 is connected through a pipe to a chemical solution suction port 55 via a hose. As shown in FIG. 6, the chemical solution first flows into the filter 44 to remove foreign matter.

An accumulator 25 is disposed on the valve case on the right side of the crankcase 26 so as to accumulate the chemical solution pumped by the reciprocating movement of the plunger and discharge the solution at a constant pressure from the nozzle. A safety valve 73 is provided behind the accumulator 25 on the valve case.
Is arranged. Of the discharged chemical liquid, the residual water that is equal to or higher than the set pressure passes through the safety valve 73, passes through the pipe 28d,
The liquid is returned to the chemical liquid return port 24b provided in the chemical liquid tank 24.

The chemical below the set pressure flows into the flow control valve 27 through the pipe 28b and into the flow control valve 29 through the pipe 28a. The flow control valves 29 and 27 are juxtaposed to the left and right above the safety valve 73 and above the crankcase 26. As will be described later, the chemical solution is supplied to the flow control valve 27.2.
The flow rate is adjusted at 9, and the chemical solution sent upward from the flow rate control valve 27 is supplied to the stirring / exhaust ports 57 opening to the left and right and the boom 40 provided further above. It flows into a boom outlet 58 for supplying a chemical solution. The chemical discharged from the stirring outlets 57 is returned to the chemical tank 24 again and used for stirring the chemical in the chemical tank 24. The chemical discharged through the boom outlet 58 is used by the boom 40 for spraying the chemical.

The chemical passing through the flow control valve 29 is returned to the chemical return port 24a provided in the chemical tank 24 via the pipe 28c.

A motor 30 is disposed above the flow control valve 29, and can rotate a gear 59 fixed to a motor rotation shaft 30a extending rearward.
The gear 59 is meshed with a gear 60 provided below, and a drive shaft 61 fixed to the gear 60 is inserted into the flow control valve 27 and the flow control valve 29. The drive shaft 6
The needle valves provided in the flow control valves 27 and 29 slide back and forth by the forward / reverse rotation of 1 so that the flow control valves 27
-The flow rate of the chemical solution passing through 29 is adjusted. Therefore, the PTO shaft 1 for reciprocating the plunger
7, the discharge amount of the chemical solution to the boom 40 can be freely changed by the drive rotation of the motor 30 without changing the drive rotation force of the motor 7.

A support arm 62 is fastened and fixed to the left end of the sub-frame 52R by a bolt (not shown).
The support arm 62 has a support plate 63 having a U-shape in side view fixed at its upper end by bolting. The flow regulating valves 27 and 29, the safety valve 73, the motor 30 and the like are supported and fixed by the support plate 63.

The structure for transmitting power to the power spray device 26 will be described. As shown in FIG. 7, the output of the engine 80 is transmitted to the traveling device via a split pulley-type continuously variable transmission mechanism 81, and the engine 80 is transmitted via a belt or the like without shifting from the continuously variable transmission 81. PT whose driving force extends rearward
The information is transmitted to the O-axis 17. The rear end of the PTO shaft 17 is connected to the front end of the input shaft 65 via the universal joint 64, the transmission shaft 19, and the universal joint 64,
The driving force from the PTO shaft 17 can be transmitted to the input shaft 65.

As shown in FIGS. 5 and 7, the rear portion of the input shaft 65 penetrates into the working machine drive case 66. Inside the working machine drive case 66, two first gears 67 and a second gear 68 are fixedly mounted on the input shaft 65. The first gear 67 meshes with a gear 70 fixed to the dynamic injection drive shaft 18, and the dynamic injection drive shaft 18 is supported by a working machine drive case 66 on the right side of the input shaft 65, and thereafter, The part penetrates into the crankcase 26 and is connected to the crankshaft so that the plunger can be driven. Then, the crankshaft of the power spray device 26 is disposed so as to face the front-back direction, and is disposed so as to be parallel to the PTO shaft 17 and aligned. The second gear 68 meshes with a gear 72 fixed to a second drive shaft 71. The second drive shaft 71 is pivotally supported by the work implement drive case 66 on the left side of the input shaft 65. Therefore, it is possible to use the second drive shaft 71 to drive another working machine. That is, it is possible to carry out the work by mounting a powder spraying work machine or the like on the traveling machine body 22 in addition to the power spraying device.

In the above configuration, the power spray device 26 is disposed on the bridge member 53 that bridges the subframes 52L and 52R as described above, and the crankshaft of the power spray device 26 is The input shaft 65 and the PTO shaft 17 of the working machine drive case 66 are arranged in the same direction without any significant difference in height. 65 and P
The inclination between the universal joints 64 for transmitting the power between the TO shafts 17 is also reduced, and the power transmission loss can be minimized. Therefore, if the height between the two shafts is different, it is necessary to transmit power between the two shafts using a gear, a belt, a chain, or the like, and a loss of power transmission occurs, but in the present invention, it can be minimized. is there.

In this embodiment, in order to be able to drive a plurality of working machines, the working machine drive case 66 is provided to realize the divergence of power. However, when only the boom sprayer is used, the working machine is not used. The drive shaft 66 is eliminated, and the input shaft 65 is directly inserted into the crankcase 26 to drive the plunger. The height from the PTO shaft 17 to the dynamic injection drive shaft 18 is substantially the same (using a universal joint). Power transmission will be possible. Therefore, the power transmission loss from the PTO shaft 17 to the dynamic injection drive shaft 18 is minimized.

[0026]

The present invention is constructed as described above, and has the following effects. A self-propelled boom sprayer in which an engine is mounted on an airframe of a traveling airframe and a power spray device driven by the engine is disposed at one end of the airframe, wherein a crankcase of the power spray device is provided. Since the substantially upper end is located lower than the substantially upper end of the body frame, the power spray device can be arranged lower than in the past, the center of gravity of the traveling body can be lowered, and traveling stability can be improved.

According to a second aspect of the present invention, in a self-propelled boom sprayer in which an engine is mounted on a body frame of a traveling body and a power spray device driven by the engine is disposed at one end of the body frame, the crankcase includes: Since it is supported by a subframe extending rearward from the rear end of the aircraft frame, it is possible to change the arrangement position of the power spray device by changing the arrangement height of the subframe without changing the configuration of the traveling aircraft itself I can do it. For this reason, it is possible to match the shaft height between the PTO shaft and the dynamic injection drive shaft, and it is not necessary to transmit the driving force using a belt, a pulley, or the like, and the efficiency of power transmission does not decrease. is there.

According to a third aspect of the present invention, at least one of the sub-frames is located below the body frame, so that the sub-frames are arranged in a stepped manner and are surrounded by the sub-frame. The main components of the power spray device can be arranged in the space and can be protected by the sub-frame. In addition, since the sub-frames are respectively arranged at different positions in the vertical position, the power sprayer can be arranged in the space between them,
Space saving can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall side view of a boom sprayer.

FIG. 2 is an overall plan view of a boom sprayer.

FIG. 3 is a side view showing the power spray device.

FIG. 4 is a rear view showing the power spray device.

FIG. 5 is a plan view showing a power spray device.

FIG. 6 is a piping system diagram in the power spray device.

FIG. 7 is a drive transmission configuration diagram from a PTO shaft to a dynamic injection drive case.

[Explanation of symbols]

 6L ・ 6R Airframe 17 PTO shaft 18 Dynamic injection drive shaft 26 Dynamic injection drive case 36 Power spray device 52L ・ 52R Subframe 64 Universal joint

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiki Minamiishi 1-32 Chaya-cho, Kita-ku, Osaka-shi, Osaka F-term in Yanmar Agricultural Machinery Co., Ltd. (Reference) 2B121 CB03 CB13 CB24 CB33 CB61 CB66 EA21 FA04 FA15 4D074 AA05 BB06 CC04 CC60

Claims (3)

[Claims] 1. A self-propelled boom sprayer in which an engine is mounted on an airframe of a traveling airframe and a power spray device driven by the engine is disposed at one end of the airframe, a substantially upper end of a crankcase of the power spray device. However, the self-propelled boom sprayer is located below the upper end of the body frame. 2. A self-propelled boom sprayer in which an engine is mounted on a body frame of a traveling body and a power spray device driven by the engine is disposed at one end of the body frame. A self-propelled boom sprayer that is supported by a subframe that extends rearward. 3. The at least one of the subframes,
The self-propelled boom sprayer according to claim 1, wherein the self-propelled boom sprayer is located below a body frame.