JPH10218031A - Cab-over-engine type agricultural vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain protection of a hood in a car body rear part, also utilize its peripheral space, form a structure able to mount tanks of auxiliary fuel tank, or control tank, fertilizer hopper, etc., and when the hood is turned, so as to prevent interference with a work machine connecting device in a car body rear end, in an agricultural vehicle arranging a cabin in a front part and the hood in a rear part of a car body to be equipped with the work machine connecting devices in the front and rear ends of the car body. SOLUTION: A work frame 2 is integrally mounted so as to surround a hood 1, relating to a chassis frame CF, a lower end of a rear part arch frame 2b is pivotally supported by a pivotal support pin, a lower end of a front part arch frame 2a is made engageable/disengageable by a lock pin 8. A turn amount of the hood 1 and the work frame 2 is regulated by a damper, along an opening part inside of a rear end of the hood 1, on the chassis frame CF, a rear grille frame 10 extending a dustproof net is vertically provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a cabin at the front of a vehicle body so that a work machine can be connected to the vehicle body both before and after the vehicle body.
The present invention relates to a structure of a bonnet portion of an agricultural vehicle having a hood serving as an engine room at a rear portion, and a work implement coupling device at a front end and a rear end of a vehicle body.

[0002]

2. Description of the Related Art A conventional agricultural tractor mainly has a structure in which a working machine is connected rearward to work, and is provided with a working machine connecting device at a rear end of a vehicle body and a hood is provided at a front portion of the vehicle body. The driver's seat is located at the rear of the vehicle. Therefore,
For example, as shown in Japanese Utility Model Publication No. 6-274511, when the driver's seat is covered with a cabin, the cabin is disposed at the rear of the vehicle body.

[0003] In this conventional agricultural tractor, when viewed from the worker sitting in the driver's seat, the working machine is disposed at the rear, and as shown in Japanese Patent Publication No. 7-22443, the working state is one at a time. I have to look back and confirm. Therefore, a front cabin agricultural vehicle has been developed in which a work machine coupling device is provided also at the front end of the vehicle body, a driver's seat is disposed at the front of the vehicle body, covered with a cabin, and a hood is disposed at the rear. In this case, when a work machine is connected to the work machine coupling device at the front end of the vehicle body and the work is performed, the worker sitting in the driver's seat in the cabin arranged at the front of the vehicle body can check the work state while looking forward. Becomes

[0004] As shown in Japanese Utility Model Application Laid-Open No. 33914/1987, a structure is known in which an air conditioner is installed in a bonnet and air-conditioned air is sent into a cabin.

[0005]

However, the front cabin agricultural vehicle has several problems with the rear bonnet. First, with a conventional hood-front tractor, there is an installation space, such as a control tank, on the frame that houses the work equipment elevating device at the back of the seat, and control work can be performed using the work equipment connected to the rear. However, with the front cabin type, the control tank cannot be mounted on the bonnet between the cabin and the work equipment coupling device at the rear. On the other hand, if a structure capable of placing objects using the large space around the bonnet is attached, an effective placing space for the control tank and harvested crops can be created, and furthermore, the hood can be protected.

Further, the bonnet must have a structure that can be opened and closed by pivoting up and down with its rear end as a fulcrum so as not to interfere with the front cabin. However, if a bonnet is provided at the rear of the vehicle body, the opening for taking in engine cooling air is
Naturally, it becomes the rear end face of the hood, and it is necessary to provide a dustproof net in this opening. Then, when the hood is opened (turned upward), the dustproof net at the rear end opening may interfere with the work implement coupling device at the rear end of the vehicle body. Further, even without such a dustproof net, the rear end portion of the hood may interfere.

Further, an outside air introduction pipe to the air conditioner in the hood extends from an outside air introduction port provided on a side surface of the hood, and is piped horizontally to the filter. With this structure, dust in the outside air gradually accumulates on the filter,
Clogging increases resistance to introduction of outside air, and reduces air conditioning capacity.

[0008]

The present invention uses the following means to solve the above problems. First, in a farming vehicle equipped with a cabin at the front of the vehicle body and a bonnet at the rear and a work implement coupling device at the front and rear ends of the vehicle body, the vehicle is pivotally supported so as to be vertically rotatable with respect to the vehicle body. The hood is covered with the work frame.

Secondly, in an agricultural vehicle equipped with a cabin at a front portion of a vehicle body, a bonnet at a rear portion of the vehicle at a rear end thereof which can be pivoted up and down, and a work machine connecting device at a front end and a rear end of the vehicle body. A rear grille frame having a dustproof net is erected on the vehicle body so as to be disposed inside the rear end opening of the hood when the hood is closed, and the hood has a rotation amount of the hood. Attach a regulating member that regulates

Third, in an agricultural vehicle equipped with a cabin at a front portion of a vehicle body and a bonnet at a rear portion thereof and a work machine coupling device at a front end and a rear end of the vehicle body, an air conditioner disposed inside the hood. The outside air introduction pipe to the lower side of the filter.

[0011]

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of a front-cabin agricultural vehicle, FIG. 2 is a front view thereof, FIG. 3 is a rear view thereof, and FIG.
FIG. 5 is a plan view showing a state where the cabin is removed, FIG. 5 is a plan view showing the bonnet 1 and the work frame 2, FIG. 6 is a front view, FIG. 7 is a rear view, and FIG.
9 is a side view when the hood is opened, FIG. 10 is a side view showing a lock structure of the lower end of the front arch frame 2a of the work frame 2 to the chassis frame CF, FIG. 11 is a plan view thereof, and FIG. 13, FIG. 13 is a side view showing a pivot structure of the lower end of the rear arch frame 2b of the work frame 2 to the chassis frame CF, FIG. 14 is a plan view thereof, FIG. 15 is a rear view thereof, and FIG. 2, the mounting shelf frame 15 is attached,
17 is a rear view, FIG. 18 is a plan view, and FIG. 19 is an arrangement of an air conditioner in the bonnet 1 in a state where tanks T such as an auxiliary fuel tank or a control tank and a fertilizer hopper are mounted. 2 and internal side view showing the piping structure, FIG.
0 is a side view showing an embodiment in which an air outlet pipe is connected to an air outlet of a dashboard from the air conditioner in the hood 1 through the lower portion of the cabin, and FIG. FIG. 22 is a side view showing an embodiment in which an air outlet pipe is connected to an air outlet of a dashboard, FIG. 22 is a plan view of a chassis frame CF, FIG. 23 is a front view thereof, FIG. 24 is a rear view thereof, and FIG. FIG. 26 is a side view showing a mounting structure of the cabin on the chassis frame CF, and FIG. 27 is a rear view thereof.

First, with reference to the chassis frame CF, the layout of each part of the front cabin agricultural vehicle according to the present invention will be described with reference to FIGS. The chassis frame CF shown in FIGS. 22 to 25 includes a pair of left and right main frames 5 arranged in the front-rear direction of the vehicle body, and brackets for attaching various members are provided at appropriate places on each main frame 5. As shown in FIG. 25, the front portion of the main frame 5 is lower by one level than the rear portion through a vertically inclined portion as shown in FIG. Also, as shown in FIG. 24, by arranging both inclined portions so as to form a figure of eight in front view (rear view), the interval between the lower portions of the front portion is widened. The cabin 23 is mounted from the one-step lower front part, the rear inclined part, and the one-step higher part behind the same.

Here, the mounting structure of the cabin on the chassis frame CF will be described with reference to FIGS. 26 and 27. At the front part of the chassis frame CF, a cabin lower frame 25 is mounted via an anti-vibration rubber G, and a seat floor 24 formed of a thin plate material is mounted on the upper part of the rear half of the cabin lower frame 25. And cabin 23
Is attached to the chassis frame CF via the anti-vibration rubber G together with the cabin lower frame 25. This part forms the cabin floor and the main frame 5.5
Since the space between the lower portions of the front part of the cabin is widened, the left-right width in the cabin chamber can be widened. On the other hand, the rear lower end of the cabin 23 is mounted on the seat floor 24.

In the cabin 23, as shown in FIGS. 1 and 4, a seat 30 is mounted on the seat floor 24, and a dashboard 31 provided with a handle 32 is provided at the front end. doing.

The bonnet 1 is mounted on the rear half of the main frame 5 of the chassis frame CF behind the cabin 23, as shown in FIGS. 1, 3, and 4.
The periphery is surrounded by a work frame 2. Further, a front working machine connecting device FL is provided at a front end portion of the chassis frame CF, and a rear working machine connecting device RL is provided at a rear end thereof. And below the chassis frame 1,
The front wheel FW and the rear wheel RW are suspended.

The arrangement of the bonnet 1 and the work frame 2 will be described with reference to FIGS. The work frame 2 has an arch frame 2a which is formed in an arch shape in a front view so as to extend along the outer peripheral surface of the bonnet 1 in a horizontal direction in a plan view.
2b are arranged in front and rear, and straight frames 2c in the vehicle front-rear direction are interposed between the front and rear arch frames 2a and 2b. The work frame 2 can be used as a mounting table in addition to protecting the hood 1. For example, as shown in FIGS. 16 to 18, mounting shelf frames 15 are connected to both sides of the work frame 2, and tanks T such as an auxiliary fuel tank, a control tank, and a fertilizer hopper are connected to the mounting shelf frame 15. And so on. The mounting shelf frame 15 is locked and attached to the linear frame 2c of the work frame 2.

On both sides of the bonnet 1, pedestals 1a and 1
a is formed by integral molding, and when the bonnet is closed, the left and right main frames 5 of the chassis frame CF
The pedestals 1a are placed on the base 5 and cover the same. The lower ends of the arch frames 2a and 2b at the front and rear ends of the work frame 2 are fixed to the front and rear portions of each pedestal 1a. As shown in FIG. 10 to FIG. 15, work frame stays 3 and 4 each having a pin hole are provided below the left and right base seats 1a, and are screwed to the lower ends of the arch frames 2a and 2b, respectively. doing. Thus, the work frame 2 is integrated with the bonnet 1.

On the other hand, a pin fixing bracket 6 is erected on the main frame 5 of the chassis frame CF,
A pivot bracket 7 is provided at the rear end of the main frame 5. A pin hole is formed in the bracket 6 for pinning, and the work frame stay 3 fixed to the lower end of the front arch frame 2a is put on the bracket 6 for pinning as shown in FIGS. The lock holes 8 are fitted and locked by aligning the pin holes. On the other hand, a pin hole is also formed in the pivot bracket 7, and as shown in FIGS. 13 to 15, the work frame stay 4 fixed to the lower end of the rear arch frame 2b is put on the pivot bracket 7. The pivot pin 9 is fitted and pivoted by aligning the two pin holes. When the bonnet 1 is opened, the lock pin 8 is removed, and the front end of the bonnet 1 is rotated upward with the pivot pin 9 as a pivot point as shown in FIG.

The rear end of the bonnet 1 is open so that the engine cooling air can be introduced. An upper part of the rear end of the chassis frame CF is arched in accordance with the inner peripheral shape of the rear end opening of the bonnet 1. Rear grille frame 10 formed
And a dustproof net 11 is stretched over a portion surrounded by the rear grille frame 10. The dustproof net 11 faces a radiator (not shown) provided upright on the chassis frame CF inside the hood 1. Further, the rear grill frame 10 is also used to support the lift arm 34, the top link 35, and the like of the rear working machine coupling device RL.

As shown in FIGS. 13 and 14, a weather strip 12 is attached to the contact portion of the bonnet 1 with the rear grille frame 9.
When no is closed as shown in FIG. 8, no gap is formed between the rear end opening of the bonnet 1 and the rear grille frame 10. Further, the front end of the bonnet 1 is also opened to communicate with the inside of the cabin for air conditioning piping and the like,
As shown in FIG. 10, a weather strip 12 is also provided at the edge of the opening so as not to form a gap.

As shown in FIG. 9, when the hood 1 is opened,
To the extent that the front end pivots upward, the rear end pivots downward at the rear. The rear grille frame 10 does not interfere when the bonnet 1 is opened (because the rear end opening of the bonnet 1 rotates downward behind the rear grille frame 10), but the rear end of the chassis frame CF and the rear grille The rear working machine coupling device RL protrudes behind the frame 10, and there is a problem that the rear working machine coupling device RL interferes with the rear end of the bonnet 1. In particular, interference with the lift arm 34 and the top link 35 supported by the rear grille frame 10 in the rear working machine coupling device RL is a problem.

In order to avoid this interference, the amount of rotation of the bonnet 1 is regulated. That is, in each pedestal portion 1a, on the side surface of each main frame 5 in the chassis frame CF,
The damper bracket 13 is projected outwardly,
On the other hand, a damper arm 4a is fixed to the outside of the rear work frame stay 4, and the damper arm 4a
A damper 14 as an air cylinder is pivotally connected between the tip of the damper bracket 13 and the damper bracket 13. Damper 14
Extends as the front end of the bonnet 1 is rotated upward, but the amount of extension is limited. That is, bonnet 1
The rotation of the bonnet 1 is stopped at the position shown in FIG. 9 at the extension limit of the damper 14, and the rear end of the bonnet 1 is connected to the rear working machine coupling device RL. Interference is avoided.

Next, the air conditioner in the hood 1 will be described with reference to FIGS. In the hood 1
An engine E is erected on the chassis frame CF. An air-conditioning bracket 16 is attached to the engine E, and the engine E is protruded upward. A unit 17 is provided. The air-conditioning bracket 16 has an air outlet window at an upper portion and an intake window at a lower portion, and the outlet window is connected to an air outlet duct 17 c of the air-conditioning unit 17. In addition, a suction duct 17a is formed at a lower portion of the air conditioning unit 17, an inlet end of the suction duct 17a is connected to a suction window of the bracket 16 for air conditioning, and an outlet end of the suction duct 17a It is connected to a blower 17b provided at the rear.

On the front side of the bracket 16 for air conditioning, an air passage box 18 which forms an outlet chamber 18b at the upper part and an intake chamber 18a at the lower part is arranged, and the rear end opening of the outlet chamber 18b is air-conditioned. The opening of the rear end of the suction chamber 18 a faces the window of the air-conditioning bracket 16, respectively. In FIG. 19, arrows indicate the flow of air.

From the suction chamber 18a, an inside air introduction pipe 21 is provided so as to protrude forward. The inside air introduction pipe 21 penetrates the front surface of the bonnet 1 and fits into the cabin 23, and the front end thereof
It faces the inside / outside air switching chamber 26 disposed in the rear wall portion 24a of the seat floor 24, and inside / outside air switching shutter 27 is pivotally supported in the inside / outside air switching chamber 26 so as to be vertically rotatable. I have. Further, an inside / outside air switching lever 28 is attached integrally with the inside / outside air switching shutter 27. The front surface of the inside / outside air switching chamber 26 faces an inside air discharge window 24b (see FIG. 4) formed on the front surface of a rear wall portion 24a of the seat floor 24 behind the seat 30 in the cabin 23, and has a dustproof screen. 29 are stretched. When the inside / outside air switching shutter 27 is closed (the inside / outside air switching lever 28 is set to the lower position), the inside air is not introduced into the inside / outside air switching chamber 26 but outside air is introduced from the intake hose 20 into the cabin chamber. When the inside / outside air switching shutter 27 is opened (the inside / outside air switching lever 28 is set to the upper position), the cabin room air is exhausted from the inside / outside air switching room 26 to the blower 17b of the air conditioning unit 17 and circulated into the cabin.

On the other hand, a filter 19 is provided below the suction chamber 18a, and an outside air introduction pipe 20 is piped downward from the filter 19, and an outer end opening of the outside air introduction pipe 20 is provided below the chassis frame CF. Is facing. Such a suction chamber 18a, a filter 19, and the outside air introduction pipe 2
By setting the positional relationship to 0, dust in the outside air introduced from the outside air introduction pipe 20 adheres to the inside of the filter 19,
The dust naturally falls into the downwardly directed outside air introduction pipe 20 and the dust 19 is prevented from adhering to the inside of the filter 19, and
External air introduction resistance does not increase so much, and efficient air conditioning can be performed.

On the other hand, an air blowing pipe 22 is provided in front of the blowing chamber 18b. If the air outlet is provided at the rear of the cabin as it is, the pipe length can be shortened. However, blowing air from the rear of the cabin is not very comfortable for an operator sitting on the seat 30 and blowing air from the front of the face. It is desirable. Therefore, the air outlet 3 into the cabin room
3 is a dashboard 31 as shown in FIGS.
Is provided. Air outlet 3 of this dashboard 31
The method of piping the air outlet pipe 22 from the inside of the bonnet 1 behind the cabin 23 up to 3 is shown in FIG. 20. First, in FIG. 20, the lower part of the cabin arranged below the cabin 23 and the seat floor 24 is shown. Piping is performed along the frame 25. In FIG. 21, the air blowing pipe 22 is provided in the frame of the cabin 23 itself. In these cases, since the heat insulation effect is provided both in the cabin lower frame 25 below the cabin and in the cabin 23 frame itself, even if the pipe length is long, there is heat insulation. Also, these pipes do not stand out visually.

[0028]

According to the present invention, the following effects can be obtained by employing the above-described structure in a front-cabin agricultural vehicle. First, by configuring as described in claim 1, the bonnet is protected by the work frame, and the bonnet does not need to have a rigid structure, which contributes to cost reduction. Further, by arranging the work frame around the bonnet arrangement portion, a space for mounting various objects, for example, a fuel tank, harvested vegetables, and the like can be secured in this portion.

Next, with the configuration as described in claim 2, the dustproof net is attached not to the bonnet but to the rear grille frame erected on the vehicle main body, so that when the dust hood is turned upward to open the bonnet. However, the dustproof net does not interfere with the work equipment coupling device disposed behind the hood. Further, since the amount of rotation is regulated by the damper, the rear end of the bonnet does not interfere with the work equipment coupling device at the rear end of the vehicle body.

According to a third aspect of the present invention, an outside air introduction pipe for introducing outside air to an air conditioner installed in the hood comprises:
By piping downward from the filter, dust attached to the filter falls down through the outside air introduction pipe,
Clogging of the filter is avoided, increase in outside air introduction resistance is reduced, and efficient air conditioning can be performed for a long time.

[Brief description of the drawings]

FIG. 1 is a side view of a front cabin agricultural vehicle.

FIG. 2 is a front view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a plan view showing a state where a cabin is removed.

FIG. 5 is a plan view of a bonnet 1 and a work frame 2;

FIG. 6 is a front view of the same.

FIG. 7 is a rear view of the same.

FIG. 8 is a side view of the same.

FIG. 9 is a side view when the hood is opened.

10 shows a front arch frame 2a of the work frame 2. FIG.
It is a side view which shows the lock structure to the chassis frame CF of the lower end.

FIG. 11 is a plan view of the same.

FIG. 12 is a front view of the same.

FIG. 13 shows a rear arch frame 2b of the work frame 2.
It is a side view which shows the pivotal support structure to the chassis frame CF of the lower end.

FIG. 14 is a plan view of the same.

FIG. 15 is a rear view of the same.

FIG. 16 shows a mounting shelf frame 15 attached to a work frame 2 surrounding a bonnet 1 and an auxiliary fuel tank or
It is a side view in the state where tanks T, such as a control tank and a fertilizer application hopper, were mounted.

FIG. 17 is also a rear view.

FIG. 18 is a plan view of the same.

FIG. 19 is an internal side view showing an arrangement and a piping structure of the air conditioner in the hood 1;

FIG. 20 is a side view showing an embodiment in which an air outlet pipe is connected to an air outlet of a dashboard through a lower portion of a cabin from an air conditioner in a bonnet 1;

FIG. 21 is a side view showing an embodiment in which an air outlet pipe is connected to an air outlet of a dashboard from an air conditioner in a hood 1 through a cabin frame.

FIG. 22 is a plan view of the chassis frame CF.

FIG. 23 is a front view of the same.

FIG. 24 is a rear view of the same.

FIG. 25 is a side sectional view of the same.

FIG. 26 is a side view showing the mounting structure of the cabin on the chassis frame CF.

FIG. 27 is a rear view of the same.

[Explanation of symbols]

 RL Rear work machine coupling device 1 Bonnet 1a Pedestal 2 Work frame 2a Front arch frame 2b Rear arch frame 2c Straight frame 3 Arch frame stay 4 Arch frame stay 4a Damper arm 5 Main frame 6 Bracket for pinning 7 Bracket for pivotal support Reference Signs List 8 lock pin 9 pivot pin 10 rear grill frame 11 dust-proof net 13 damper bracket 14 damper 15 mounting shelf frame 16 air-conditioning bracket 17 air-conditioning unit 18 air passage box 18a suction chamber 18b outlet chamber 19 filter 20 outside air introduction pipe 21 inside air Inlet pipe 22 Air outlet pipe

Claims (3)

[Claims] 1. An agricultural vehicle having a cabin at a front part of a vehicle body and a bonnet at a rear part thereof and a work machine coupling device at a front end and a rear end of the vehicle body. A front-cabin agricultural vehicle, wherein the hood is covered with a work frame. 2. An agricultural vehicle comprising a cabin at a front portion of a vehicle body, a bonnet at a rear portion which is rotatable up and down with a rear end as a fulcrum, and a work machine connecting device at a front end and a rear end of the vehicle body. On the main body, a rear grille frame having a dustproof net is erected so as to be arranged inside the rear end opening of the hood when the hood is closed, and the hood controls the amount of rotation of the hood. A front-cabin agricultural vehicle, characterized in that a regulating member is mounted. 3. An agricultural vehicle equipped with a cabin at a front portion of a vehicle body and a bonnet at a rear portion thereof and a work implement coupling device at a front end and a rear end of the vehicle body, wherein an outside air for an air conditioner disposed in the hood is provided. A front-cabin agricultural vehicle, wherein the introduction pipe is piped downward from the filter.