JPH08218431A - Back hoe - Google Patents

Abstract

PURPOSE: To reduce opening-closing operation force for an engine bonnet as a prime mover section is largely opened in a back hoe having a drivers seat arranged above the engine bonnet. CONSTITUTION: An engine bonnet 6 is dividedly formed of a front fixed bonnet part 6a and a rear part openable bonnet part 6b including a part located below a drivers seat 7. The drivers seat 7 is thrown down toward the front fixed bonnet part 6a, and attached so that it may be freely oscillated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small backhoe in which a driver's seat is arranged above an engine bonnet, and more particularly to improvement of a structure for opening a driving part.

[0002]

2. Description of the Related Art Conventionally, in a small backhoe, the entire engine bonnet with a driver's seat attached is constructed so that it can be swung up and down, and the engine bonnet can be opened wide for easy maintenance and inspection. [See, for example, Kaikaihei 5-64231].

[0003]

However, when the driver's seat is attached to the opening / closing engine bonnet, the thickness of the engine bonnet is increased or the reinforcing member is provided in order to provide sufficient strength to withstand the load from the driver's seat. It is necessary to attach it, and the weight of the engine bonnet tends to be large, and since the engine bonnet is opened and closed for each driving seat, a large force is required for its operation.
There was room for improvement in terms of opening and closing operability of the engine bonnet.

Incidentally, in some small backhoes, an opening for maintenance is provided on the peripheral side surface (mainly the rear surface) of the engine bonnet to which the driver's seat is attached, and it is constructed to be opened and closed by an inspection cover. Although it can be opened and closed easily with the inspection cover during maintenance, the engine room cannot be opened widely,
The maintainability was poor.

The present invention has been made by paying attention to such an actual situation, and an object thereof is to greatly reduce the operating force required for opening and closing the engine bonnet while allowing the prime mover to be largely opened.

[0006]

In a backhoe in which a driver's seat is arranged above an engine bonnet, the engine bonnet is located at a front fixed bonnet portion and below the driver's seat. It is divided into a rear opening and closing bonnet part including a part, and the driver's seat is attached to the front fixed bonnet part side by tilting forward so as to be freely swingable.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the rear opening / closing bonnet portion is configured to be capable of swinging and opening upward with its upper front end as a fulcrum. is there.

[0008]

According to the structure of the first aspect, the engine bonnet is divided into the front fixed bonnet portion and the rear opening / closing bonnet portion, and the driver's seat is attached to the front fixed bonnet portion side which is the fixing member. The opening / closing bonnet part does not need to be strong enough to withstand the load from the driver's seat, and the rear opening / closing bonnet part can be configured to be relatively lightweight.
Moreover, since the driver's seat is not attached to the rear opening / closing bonnet portion, the operating force required for opening / closing the rear opening / closing bonnet portion can be significantly reduced as a whole. Moreover, the rear opening / closing hood can be made larger by including the part located below the driver's seat in the rear opening / closing bonnet, and the driver's seat can be tilted to the front so that it can be swung freely for maintenance and inspection in the engine room. The seat can be kept out of the way, and the driving part as a whole can be opened widely for easy maintenance and inspection.

According to the second aspect of the present invention, the rear opening / closing bonnet portion is swingably opened upward with the front end of the upper portion as a fulcrum, so that the opened rear opening / closing bonnet portion does not largely project outward from the machine body. The room can be opened. In other words, if the rear opening / closing bonnet is configured to swing laterally to open, the opened rear opening / closing bonnet will largely project outward from the airframe, and the airframe will face the wall of a building such as a garage. In the state where it is stored close to, it may not be possible to open the rear opening and closing bonnet part greatly sideways,
Such an inconvenience is reduced by swinging upward.

[0010]

According to the first aspect of the present invention, it is possible to provide a backhoe having excellent open / close operability of the engine bonnet, which can easily open and close the engine bonnet while widely opening the driving part.

According to the invention of claim 2, even when the machine body is located close to the wall of the building, the engine bonnet can be largely opened to facilitate the maintenance. The effect of the invention of claim 1 Can be further enhanced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a swivel base 3 is mounted on a traveling vehicle equipped with a pair of left and right crawler type traveling devices 1 and a tosa 2 which can be moved up and down so as to be driven and swiveled around a vertical axis, and swiveled. A swing bracket 4 is attached to the front end of the base 3 by a swing cylinder Cs so as to be swingable right and left, and a boom 5a driven up and down by a boom cylinder C1, an arm 5b bent and extended by an arm cylinder C2, and a bucket cylinder C3 are swung. A backhoe device 5 in which buckets 5c that are moved and turned in reverse are sequentially connected is attached to the swing bracket 4, and a driver's seat 7 is arranged above an engine hood 6 arranged at a rear portion of a swivel base 3, and a driver's seat 7 By providing a canopy 8 that covers the upper part of the, a small backhoe with a dozer is configured.

The left and right crawler type traveling devices 1 are configured to be movable in and out laterally by hydraulic cylinders C4 so that the grounding intervals of the left and right crawler type traveling devices 1 can be changed and the left and right of the tozer 2 can be changed. Both end portions 2a are configured to be independently movable in the lateral direction by a hydraulic cylinder C5, and the dozer end portions 2a on the same side on the left and right sides are configured to be extended and retracted in synchronization with the change in the interval of the crawler type traveling device 1. There is.

As shown in FIGS. 2 and 3, the engine 10
The radiator cooling fan 11 driven horizontally by the engine power is installed in the upper side of the engine 10 inside the engine bonnet 6, and is formed in the center of the upper surface of the engine bonnet 6 in the left-right direction. Recess 12
The driver's seat 7 is placed inside the engine hood 6
Upward convex portions 1 located on both left and right sides of the concave portion 12 in
The upper part of the radiator 14 is placed in the inner space of the right convex portion 13 out of 3, and the battery 15 which is one of engine accessories is installed in the inner space of the left convex portion 13.
The upper part of the is placed inside.

As shown in FIG. 2, the engine hood 6
Is divided into a front fixed bonnet portion 6a and a rear opening / closing bonnet portion 6b including a portion located below the driver's seat 7, and the rear opening / closing bonnet portion 6b swings vertically around a fulcrum P via a hinge 16. It is attached so that it can be opened and closed freely. Then, an inspection cover 17 that covers the hydraulic oil tank and the fuel tank installed in the front portion on the right lateral side of the front fixed bonnet portion 6a is attached so as to be vertically swingable around the lateral fulcrum Q, and the rear opening / closing bonnet portion 6b. An intake port 18 for taking in cooling air and an exhaust port 19 for exhausting cooling exhaust air are formed on the left and right side surfaces of.

As shown in FIGS. 4 and 5, the seat mounting bracket 21 is mounted on the gate-shaped fixed supporting member 20 which is erected on the swivel base 3 while being fastened together with the front fixing bonnet portion 6a. 21, the driver's seat 7 is tilted forward around a fulcrum 22 and is swingably mounted, and a column 23 supporting the rear end side of the front fixed bonnet portion 6a is erected on the swivel base 3.
A rubber seat 24 attached to the bottom surface of the driver's seat 7 is mounted on the rear end side of the front fixed bonnet portion 6a to support the driver's seat 7 in a sitting posture, and the driver's seat in the forward tilted posture. 7 is abutted on the operating lever 25.

A hinge 16 is attached to the rear opening / closing bonnet portion 6b.
Is attached to the column 23 so as to be vertically swingable, and the rear opening / closing bonnet portion 6b is largely opened upward so that the driver's seat 7 can be tilted forward and not in the way. That is, the driver's seat 7 is attached to the front fixed bonnet portion 6a side, the rear opening / closing bonnet portion 6b is formed to have relatively low strength and light weight, and the operation force required for opening / closing the rear opening / closing bonnet portion 6b can be reduced. is there. The rear opening / closing bonnet portion 6b is enlarged by setting a bonnet dividing line so that the rear opening / closing bonnet portion 6b includes a portion located below the driver's seat 7, and the driver's seat 7 is tilted forward to move the rear opening / closing bonnet. The portion 6b is configured to be opened wide so that the driving part can be easily maintained and inspected. Although not shown, the rear opening / closing bonnet portion 6b which is swingably opened upward is maintained in its open posture by a supporting member such as a waist bending link or a gas damper.

[Other Embodiments] The swinging / opening direction of the rear opening / closing bonnet portion 6b can be appropriately changed, and the rear opening / closing bonnet portion 6b may be detachably attached. The specific structure of the fixed support member 20 and the specific structure for attaching the driver's seat 7 to the front fixed bonnet portion 6a side so as to be freely swingable can be changed in design as appropriate. For example, the driver's seat 7 can be directly attached to the front fixed bonnet portion 6a. May be attached. The backhoe device 5 may not be swingable right and left, the dozer 2 and the canopy 8 may be omitted, a driving cabin may be provided, and the backhoe type may be appropriately changed.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of drawings]

1] Overall side view of backhoe

[Fig. 2] Overall plan view of backhoe

[Fig. 3] Rear view of the vertical section of the driving part

FIG. 4 is a partially cutaway side view of the swivel base.

FIG. 5 is a partially cutaway side view of the swivel base with the engine hood open.

[Explanation of symbols]

 6 Engine bonnet 6a Front fixed bonnet part 6b Rear opening / closing bonnet part 7 Driver's seat

Claims (2)

[Claims] 1. A backhoe in which a driver's seat (7) is arranged above an engine bonnet (6), wherein the engine bonnet (6) is a front fixed bonnet portion (6a) and below the driver's seat (7). And a rear opening / closing bonnet portion (6b) including a portion located at the front side of the driving seat (7).
A backhoe that is attached to the side a) so that it can be swung forward. 2. The rear opening / closing bonnet portion (6b)
The backhoe according to claim 1, wherein the backhoe is configured so as to be swingable and open upward with the front end of the upper portion as a fulcrum.