JPH0798495B2 - Work vehicle bonnet structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a bonnet structure for a work vehicle.

Conventional technology In backhoes, an excavator is attached to the front of the machine with a driver's seat, and an engine is mounted on the rear of the machine, which is behind the driver's seat. (See, for example, Japanese Utility Model Laid-Open No. 61-84764).

On the other hand, in the backhoe, the aircraft with the driver's seat is attached so that it can rotate horizontally 360 degrees with respect to the undercarriage, and during excavation work, the aircraft on the upper side with this driver's seat is rotated. While going. At that time, since the bonnet side is in the rear part which is a blind spot of the operator, it often collides with an obstacle and is damaged during turning. Therefore, in order to protect the bonnet, it is known that a protective structure such as a bumper is further provided around the bonnet. For example, in Jitsukai Sho 63-950, a bumper is provided around this bonnet.

However, in this example, since the bonnet is fully open, the bumper is placed from the bottom end of the bonnet in order to avoid buffering between the bumper provided near the bonnet side wall and the bonnet side wall when opening the bonnet. It can only be provided to a slightly higher position and only a slight bonnet protection effect can be obtained. To deal with this, the bumper may be positioned outside the airframe from the side wall of the bonnet, but then the turning radius of the airframe becomes large and the degree of collision with obstacles increases.

Therefore, if the bonnet is divided into an openable / closable region and a fixed region, and a bumper is provided only in the fixed region, the bonnet side wall and the bumper are cushioned when the lid is opened, as in the case of the above fully openable / closable hood. In order to reduce the turning radius of the vehicle body, the bumper can be provided even on the upper surface of the bonnet even if the bumper is set at a position close to the side wall of the bonnet. As a result, the protection effect of the bonnet can be significantly increased as compared with the conventional case. In this case, since the position where the collision between the bonnet and the obstacle is most likely to occur is the left and right positions of the rear side surface of the bonnet, it is advisable to adopt a configuration in which the fixing regions of the bonnet where the bumper is provided are located at these left and right positions.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, due to the provision of the fixing region in the bonnet, when the radiator is arranged in the fixing bonnet region, there is a new inconvenience that it becomes difficult to operate the cap. Occurs. Of course, if only the part corresponding to this cap is left open, it can be opened and closed easily, but in general, this type of work vehicle is often left in the field, and it is a mischief if the cap can be easily operated. There is a fear of being stored, so it is necessary to keep it in the bonnet when it is not needed. Incidentally, the bonnet member which can be opened and closed can normally be locked by a key.

The present invention has been made to solve such a problem, and when a radiator is arranged in a fixed area of a bonnet having an openable / closable area and a fixed area, when the bonnet in the openable / closable area is closed. An object of the present invention is to provide a bonnet structure for a work vehicle in which the operation of the radiator cap can be prevented from mischief or the like, and which can be easily operated by opening the bonnet.

Means for Solving the Problems In order to achieve the above-mentioned object, in the present invention, an engine is arranged in the rear part of a machine body, and the engine is covered with a bonnet. It is divided into a fixed bonnet member that is fixed to the inside, and an engine radiator is installed inside the fixed bonnet member, and an opening for operating the cap is operated on the fixed bonnet member in correspondence with the radiator cap. Formed on the bonnet member that can be opened and closed freely,
It is characterized in that an auxiliary lid for covering the opening is integrally provided.

In addition to forming an opening for cap operation in the fixed bonnet member of the part corresponding to the cap of the radiator,
Since the opening / closing bonnet member is integrally provided with an auxiliary lid for covering the opening, when the opening / closing bonnet is closed, the opening is covered by the auxiliary lid, and the operation of the cap can be prevented from mischief. When the member is opened, the opening is released to allow easy manipulation of the cap.

Example Hereinafter, the configuration of the present invention will be described based on an illustrated example implemented on a backhoe.

In FIGS. 1 to 3, (1) is a lower traveling body equipped with a crawler traveling device, and an upper revolving structure (2) is horizontally rotated 360 degrees on the lower traveling structure (1). It is installed freely. On the upper surface of the upper swing body (2),
A seat (3) that constitutes a driver's seat is arranged at a substantially center in the front-rear direction so as to be biased toward the left side of the machine body. Further, various operation levers (4) and (4) and operation pedals (5) and (5) are arranged at a front end portion of the body which is a front side of the seat (3), and these levers (4) and pedals are arranged. (5) and driver's seat (6) with seat (3)
Are configured. In the center of the front end of the upper swing body (2),
Excavator (11) consisting of boom (8), arm (9), bucket (10), etc. via bracket (7)
However, it is mounted so that it can swing in the left-right direction. (12)
Is a hydraulic oil tank arranged on the right side of the seat (3) for driving the working machine (11), turning the upper revolving structure (2), and traveling the lower traveling structure (1). The hydraulic oil for operation is stored.

An engine (13) is mounted in the center of the rear end of the upper swing body (2) behind the driver's seat (6), and a radiator (14) is arranged on the right side of the engine (13) and a left side of the engine (13). Is equipped with a fuel tank (15). And these engine (13), radiator (14) and fuel tank (15)
However, the bonnet (16) is divided into three parts in the left-right direction as shown in FIG. 5, and the central bonnet member (17) covering the engine (13) part is The left and right bonnet members (18) (19) cover the radiator (14) or the fuel tank (15) while the rear end portion is flipped upward to open and close.
Is fixed to the fuselage and cannot be opened or closed.

(20) (20) are the left and right side surfaces of the bonnet (16),
Further, there is shown a guard device that extends from the left and right side surfaces to the rear side of the bonnet (16) and covers a part of the rear side surface of the bonnet (16). These guard devices (20) (20)
As shown in FIG. 4, is a balance weight (21) fixed to the frame of the airframe, that is, the upper swing body (2).
And a pipe fence (22) attached to the upper end of the balance weight (21). Pipe fence (2
In 2), both ends of the main body (23) bent in a gate shape are inserted into the mounting holes formed in the balance weight (19) and mounted. (24) is a horizontal rail attached to the portal body (23). These guard devices (20) (20)
Are bent and formed in a substantially L shape when viewed from a plane so as to extend from the left and right side surfaces of the bonnet (16) to the rear side surface, thereby forming the left and right side surfaces and a part of the rear side surface of the bonnet (16). Protects. In this case, the rear side surface of the bonnet (16) covers only the rear side surfaces of the fixed bonnet members (18) and (19), and the central opening / closing bonnet member (17) is opened rearward to prevent the opening / closing operation. I try not to. Most of the possibility of collision at the time of turning is on the outer side portion of the fixed bonnet members (18, 19), and even in this case, the bonnet (16) is sufficiently protected. The pipe fence (22) is, as shown in FIG. 2, almost two-thirds of the hood (16).
It covers up to the height position. As previously mentioned,
Since the opening / closing of the bonnet (16) is performed by the central opening / closing bonnet member (17), it is possible to raise the pipe fence (22) to cover the protected portion of the bonnet almost completely. In addition, in FIG. 2 and FIG. 3, (2
5) is a canopy which is supported on the upper revolving structure (2) through the columns (26). In FIG. 1, the canopy (25) is removed.

The engine radiator (14) is installed inside the fixed bonnet member (19) on the right side of the fuselage. If this condition remains, the hood member (19) will not open. It is difficult to open and close 27). Therefore, in order to deal with this, if only the part corresponding to this cap (27) is left open all the time, the opening and closing is easy, but if it is easy to operate, it may cause mischief and unnecessary In that case, it is still necessary to put it in the bonnet (16). This is also as described in the section of the conventional example, but since the point of the present invention is to solve this problem, the configuration in this respect will be shown below. The bonnet member (17) that can be opened and closed is locked with a key when the lid is closed.

6 to 7, in this example, first, the fixed bonnet member (19) at a portion corresponding to the cap (27) is
Cut out from its end in a nearly square shape, by which
An opening (28) for operating the cap (27) is formed, and an auxiliary lid (33) for covering the opening (28) is integrally fixed to the end of the opening / closing bonnet member (17). . Thus, when the opening / closing bonnet member (17) is closed, the opening (28) is covered by the auxiliary lid (33), and when the opening / closing bonnet member (17) is opened, the opening (28) is released. , Cap (27) can be operated.

In addition, as shown in FIGS. 6 to 8, (34) is an opening / closing lid (2
9) Or a contact plate for the auxiliary lid (33).

EFFECTS OF THE INVENTION According to the present invention, in the hood for protecting the engine provided in the rear portion of the seat of the work vehicle, the openable and closable portion and the fixed portion are provided, and the radiator is housed in the fixed portion. An opening is provided in the fixed bonnet of the portion corresponding to the radiator, and an auxiliary lid that closes the opening is integrally provided in the bonnet that can be opened and closed, so the cap of the radiator can be operated when opening the bonnet. Moreover, when the bonnet member is closed, the opening for radiator operation can be closed by the auxiliary lid, and this portion can be protected from mischief.

On the other hand, it is not necessary to provide a special opening / closing mechanism and a lock mechanism for operating the cap of the radiator, and the structure of this portion is simplified, and the number of parts is reduced.

[Brief description of drawings]

FIG. 1 is a plan view of a backhoe showing an embodiment of the present invention,
FIG. 2 is a rear view of the same, FIG. 3 is a side view of the same, FIG. 4 is a side view of the guard device, FIG. 5 is a perspective view of the bonnet and the guard device, and FIG. 6 is an enlarged main part of the auxiliary lid portion. Plan view,
FIG. 7 is a transverse cross-sectional view of the center of FIG. 6, and FIG. 8 is a perspective view of essential parts showing a state in which the auxiliary lid is opened. (2) …… Upper revolving structure (airframe), (13) …… Engine, (14) …… Radiator, (16) …… Bonnet, (17) (18) (19) …… Bonnet member, (20) …… Card device, (27) …… Radiator cap, (28) …… Opening part, (33) …… Auxiliary lid.

Claims (1)

[Claims] 1. An engine is arranged at the rear of an airframe, and the engine is covered with a bonnet. The bonnet is divided into an openable and closable bonnet member and a fixed bonnet member fixed to the airframe, and fixed. An engine radiator is provided inside the bonnet member, an opening for operating the cap is formed in the fixed bonnet member corresponding to the cap of the radiator, and the openable and closable bonnet member covers the opening. A bonnet structure for a work vehicle, which is provided with an auxiliary lid integrally.