JP2843807B2 - Turning work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a revolving frame,
At the front end of an upper structure composed of a seat, an engine, a radiator, a hydraulic pump, a fuel tank, and the like, a work machine operable up and down and left and right is provided. The present invention relates to a configuration of a hood provided with a maintenance cover in a turning work vehicle such as a back turning small back turning type capable of digging a ditch in an alley through which a traveling device can pass.

[0002]

2. Description of the Related Art In a conventional turning work vehicle such as a backhoe, the technology of a standard type and an improved ultra-small turning type turning work vehicle is known. Further, a standard type backhoe is known, for example, as disclosed in Japanese Utility Model Laid-Open No. 57-202461, and a micro-swirl type backhoe is known, as described, for example, in Japanese Utility Model Application Laid-Open No. 1-164337.

[0003]

SUMMARY OF THE INVENTION Conventionally, Japanese Utility Model Application
As shown in JP-A-202461, there is a so-called standard type backhoe, but it has the following problems.
Since the rear portion of the revolving frame above the traveling device protruded beyond the width of the traveling device during turning, the rear portion was likely to collide with an obstacle. In particular, when digging at the side of a wall, the aircraft is moved to the side of the wall to dig a gutter, so when turning to load earth and sand on a truck stopped on the opposite side of the wall, the rear part of the turning frame is And the upper turning frame could not be turned. Therefore, excavation work in a narrow place was impossible.

In order to solve the problems of the standard type backhoe, an ultra-small turning type backhoe as disclosed in Japanese Utility Model Laid-Open Publication No. 1-164337 has been developed. In the case of this ultra-small turning type backhoe, the turning frame at the top of the traveling device does not protrude from the width of the traveling device during turning, and therefore fits within the width. Therefore, work in a narrow place becomes possible. However, when digging a gutter, the ultra-small swivel type backhoe can only operate the work implement in the vertical direction, so an offset boom mechanism is required at the top of the boom to operate the work implement in the left-right direction. By providing this offset boom mechanism at the upper part of the boom, when excavating with a bucket at the tip of the arm by tilting the offset boom of the offset boom mechanism to the side groove sideways in the left-right direction when digging the side groove, There was a problem that the offset boom mechanism came into contact with the portion and it was not possible to dig deeper than that. Also, when digging a gutter by the wall, after digging the earth and sand of the gutter, raising the working machine and standing up,
When turning to transport the earth and sand to the truck bed, the boom of the work machine is offset when digging the gutter, so when the work machine is raised and raised in this state, the position of the eccentric position is The rear part of the arm cylinder projects from the turning frame from the offset boom mechanism. When the turning frame is turned from this state, the rear portion of the arm cylinder projects from the rear portion of the turning frame, so that the rear portion of the arm cylinder protrudes from the width of the traveling device. Therefore, there is a problem that the arm cylinder comes into contact with the side wall and cannot turn. Further, since the offset boom mechanism exists above the boom constituting the working machine, the weight of the working machine increases. Therefore, when the work machine is extended forward, the work machine is heavy and the balance of the work vehicle is deteriorated. Also, when you raise the work machine and stand it,
Since the work machine is heavy, the position of the center of gravity of the work vehicle is increased, and stability is deteriorated. For this reason, there was a problem that work or running at a high speed was not possible.

[0005] Further, in the ultra-small swivel type backhoe described in Japanese Utility Model Laid-Open No. 1-164337 , a fuel tank and a small-sized backhoe are used.
Hydraulic oil tanks are located adjacent to each other, however,
There is no description of providing a maintenance cover that can be opened and closed on a bonnet above the fuel tank and the hydraulic oil tank. The present invention is to solve the problem of the above ultra-small swing radius type backhoe, ensuring stability body, while covering the bonnet, inspection of the fuel tank and hydraulic oil tank and the engine of the inner portion can be easily It is an object to configure a turning work vehicle having such a configuration.

[0006]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. A swing frame is swingably mounted on the traveling device via a swing table bearing, and an upper structure is configured by the swing frame, a seat, an engine, a radiator, a hydraulic pump, a fuel tank, a hydraulic oil tank, and the like. At the front end of the turning work vehicle provided with a work machine operable up and down and left and right, at least the rear largest dimension portion of the upper structure is within the width of the traveling device, the fuel tank and the hydraulic oil tank are adjacent Bonnet on the right side of the seat, above the fuel tank and hydraulic oil tank
The fuel tank and hydraulic oil tank.
A maintenance cover that can be opened and closed is provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a left side view of the turning vehicle, FIG. 2 is a right side view thereof, FIG. 3 is a rear view thereof, FIG. 4 is a plan layout view in the upper structure B, and FIG. FIG. 6 and FIG.
7 is a plan view showing the arrangement of the counterweight W, the hanging hook 35, and the locking recess 36, FIG. 8 is a side sectional view of the same, and FIG. 9 is a plan view of the counterweight W. 10, FIG. 10 is a plan view showing a state in which the maintenance cover 34 is opened, FIG. 11 is an enlarged plan view of a part of the fuel tank 37, the hydraulic oil tank 38, and the maintenance cover 34.
FIG. 12 is a side cross-sectional view of the maintenance cover 34 and the inspection window 30, and FIG. 13 is a front cross-sectional view showing the relative positions of the fuel filler 33, the bonnet 6, and the maintenance cover 34.
4 is a perspective view of a state where the maintenance cover 34 is opened,
FIG. 15 is a perspective view showing a state where the maintenance cover 34 is closed.

The overall construction of the excavator will be described with reference to FIGS. The revolving frame F is supported on the crawler traveling device 3 via a revolving table bearing 26. The hood 6 and the seat S are arranged on the revolving frame F, and the canopy C supported by the canopy posts 11 and 12 is provided on the seat S. The canopy struts 11 and 12
Also serves as a safety frame that protects the operator sitting in the seat S when falling down. A bucket 4 which is supported by the main boom 1 and the bucket arm 2 and performs excavation work is supported at a front portion of the turning frame F.
The bucket 4 is configured to be able to operate vertically and horizontally.

As shown in FIGS. 4 and 5, the upper structure B is
It comprises a revolving frame F, a seat S, an engine E, a hydraulic pump device P, a radiator 7, and the like. The rear largest dimension of the upper structure B is within the width of the crawler type traveling device 3. The engine E is disposed rearward of the turning center of the turning frame F. The upper structure B is disposed within a turning diameter that is substantially the same as the width of the crawler traveling device 3 centered on the swivel bearing 26, and the main boom is located forward of the front end of the upper structure B. 1, a work machine including a bucket arm 2, a bucket 4 and the like is arranged, and a seat S is arranged at a position overlapping with the engine E. At the front of the seat S, an operation column 5 is provided upright. Operation pedals 25L and 25R are arranged at left and right positions of the operation column 5. Reference numeral 15 denotes a tool box provided on the left canopy mount 9.

The hood 6 is placed in a semicircular shape on the left and right sides of the revolving frame F, and a recess 16 for placing the seat S is provided at the center of the hood 6. The recess 1
To the left and right of 6, canopy mounts 8.9 supporting the canopy posts 11 and 12 are arranged. The canopy mounts 8 and 9 are stored upright in the hood 6.
At the base of the canopy struts 11 and 12, canopy boots 1
1a and 12a are attached, and the canopy support 11.1.
2 is mounted on mounting brackets 8a and 9a protruding above the right canopy mount 8.

The bases of the canopy struts 11 and 12 are covered with canopy boots 11a and 12a to improve design and provide safety. The right canopy mount 8 and the left canopy mount 9 themselves are arranged inside the bonnet 6, but the mounting brackets 8a and 9
A portion protrudes from the upper surface of the bonnet 6, and the lower portions of the canopy posts 11 and 12 are fixed to the portion by bolts. And the left and right canopy struts 11 and 12
A reinforcing rod 17 is provided between the reinforcing rods 17.
Is also used as an operator's safety bar at the rear of the seat S.

Among the canopy mounts provided on the left and right, the right canopy mount 8 is arranged on the exhaust side of the radiator 7 on the side of the engine E. The right canopy mount 8 also functions as an air exhaust guide for guiding exhaust air discharged from the radiator 7 backward. Therefore, the inside of the right canopy mount 8 is hollow, and the front side is formed as a guide plate. The radiator 7 is provided with a radiator fan 7a.

The left canopy mount 9 is disposed at a position on the left side of the engine E, which is disposed obliquely to the traveling direction, and is a hydraulic pump fixed on an extension so as to be driven by the crankshaft of the engine E. It is configured to cover the periphery of the device P. By using the left canopy mount 9, a hydraulic pump device P which is an expensive precision part
However, it is configured not to be deformed and damaged by impact or collision. As shown in FIG. 5, the seat S is provided in the concave portion 16 formed on the engine E, and the concave portion 16 can be formed by avoiding the radiator 7 having a high height. It can be placed in the position. The hood 6 above the storage side of the radiator 7 has a convex portion. The operation column 5 is arranged at the front of the seat S, and a front handrail 27 is provided at the front of the operation column 5. Seat S
The maintenance cover 34 is disposed on the right side of the vehicle, the inspection window 30 is opened at the rear of the seat S, and the counterweight W is also disposed on the turning frame F at the rear.

In FIG. 6, the radiator 7 is arranged close to the hood 6 on the outer periphery of the turning frame F.
The radiator 7 is fixed to the bonnet 6 via a vibration-proof rubber 32. This radiator 7 is attached to the vibration isolating rubber 32
As a result, the mounting bracket for the radiator 7 is no longer necessary because it is fixed to the inner surface of the hood 6. When the radiator 7 is arranged at right angles to the engine E, the area of the exhaust opening opening in the bonnet 6 is reduced. However, by arranging the radiator 7 in contact with the bonnet 6, the area of the exhaust opening is reduced. It was possible to compose a full. In the case of this embodiment, a right canopy mount 8 is arranged between the engine E and the radiator 7.

Next, the configuration of the counter weight W will be described with reference to FIGS. Counter weight W
1 is mounted and fixed on a turning frame F at the rear of the seat S as shown in FIG. 1. When the counterweight W is lifted and fixed on the turning frame F, the hanging hook 35 and the wire are fixed. It is lifted by 29. However, when the counterweight W is lifted by a normal crane truck or the like, the counterweight W is unstable, and the counterweight W may fall down or fall off, causing a personal injury. In the present embodiment, a locking recess 36 is provided so that the counterweight W can be reliably hung by the hanging hook 35 and the wire 29, and the hanging hook 35 is fitted into the portion of the locking recess 36. . As a result, the counterweight W does not fall down. In FIG. 7, a lock fitting 28 is fitted into the upper part of the counterweight W, and a wire 29 is passed through the lock fitting 28 to prevent the upper part from swinging.

Next, a description will be given with reference to FIGS. A fuel tank 37 and a hydraulic oil tank 38 are disposed inside the bonnet 6 at the front left side of the seat S, and the bonnet 6 in this portion is open. A maintenance cover 34 is openably and closably disposed at the opening.
The maintenance cover 34 is configured as a lid that is upwardly convex, and is configured so that the state of the fuel supply port 33 protruding from the bonnet 6 is stored in the maintenance cover 34.

As shown in FIG. 13, the upper portion of the fuel tank 37 from which the fuel supply port 33 protrudes is opened so that the bonnet 6 is hollowed out, and the fuel supply port 33 is provided in a concave portion of the bonnet 6. I have. And the upper end of the refueling port 33 is
When the maintenance cover 34 is opened, it is in a state of protruding from the hood 6. Maintenance cover 34
Is closed, the filler port 33 is covered and stored.

[0018]

The invention of the present application is constructed as described above.
The effect is as follows. First, a work machine is pivotally supported at the front end of the upper structure so as to be operable in the vertical and horizontal directions, and at least the largest rearmost dimension of the upper structure is within the width of the traveling device. The rear largest dimension of the turning frame fits within the width of the traveling device, and the rear portion of the turning frame does not come into contact with an obstacle during turning. Secondly, particularly at the time of digging a gutter, a work implement is pivotally supported at the front end of the upper structure so as to be operable in the up-down direction and the left-right direction, and at least the largest rearmost dimension portion of the upper structure is within the width of the traveling device. Therefore, there is no need for an offset boom mechanism, and the rear portion of the upper structure can be turned within the width of the traveling device. Thereby, the rear boom of the upper structure can be turned within the width of the traveling device, and the offset boom does not hit the edge of the groove at the time of digging the side groove, so that there is no problem that the digging is deep. Therefore, since the turning frame is turned and the work machine is operated in the left-right direction to dig a gutter, deep ditching can be performed using the entire work machine.

Third, in a turning work vehicle in which a working machine is pivotally supported in the vertical and horizontal directions at the front end of the upper structure,
Since at least the rear largest dimension of the upper structure is set within the width of the traveling device, the offset boom mechanism is not required, so that the arm cylinder does not protrude from the turning frame when the work machine is set up. Therefore, at the time of turning, the rear portion of the arm cylinder does not protrude from the width of the traveling device. Therefore, it is possible to dig a gutter near the wall, and furthermore, it is possible to make a turn for loading the digged earth and sand on a truck on the opposite side of the wall. Fourth, since the work machine does not require an offset boom mechanism, the work machine becomes lighter, so that the front-rear balance of the machine is not deteriorated. Work and traveling at a high speed.

Fifth, since the fuel tank and the hydraulic oil tank are arranged adjacent to each other, and the hood above the fuel tank and the hydraulic oil tank is provided with a maintenance cover that can be opened and closed, so that the maintenance cover can be moved outward. By opening, it is possible to supply fuel to the fuel tank from the outside of the fuselage and to perform maintenance on the hydraulic oil tank and the like. Sixth, since the fuel tank and the hydraulic oil tank are arranged adjacent to each other, and a maintenance cover that can be opened and closed is provided above the fuel tank and the hydraulic oil tank, the maintenance covers are opened to check both tanks. Can be performed simultaneously. Seventh, the fuel tank and the hydraulic oil tank are arranged adjacent to each other, and the maintenance cover that can be opened and closed is provided above the fuel tank and the hydraulic oil tank. As a result, there is no danger of damage to the filler opening, and the design of the bonnet in appearance is improved.

Eighth, the bonnet surface on the right side of the seat
The maintenance cover is located on the
The maintenance cover can be easily opened and closed with your right hand
To visually check the fuel tank and hydraulic oil tank.
Can be. Ninth, by opening and closing the maintenance cover
To open the upper parts of the fuel tank and hydraulic oil tank.
Configuration, the maintenance cover must be large.
No need for a small maintenance cover
It is easy to open and close, making maintenance work easy.
Can be.

[Brief description of the drawings]

FIG. 1 is a left side view of a turning work vehicle.

FIG. 2 is a right side view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a plan layout view in the upper structure B.

FIG. 5 is a rear sectional view of the upper structure B;

FIG. 6 is a plan view of the embodiment in which the radiator 7 is arranged on the wall of the turning frame F.

FIG. 7 is a view showing an arrangement of a counterweight W, a hanging hook 35, and a locking recess 36;

FIG. 8 is a side sectional view of the same.

FIG. 9 is a plan view of a counterweight W.

FIG. 10 is a plan view showing a state where a maintenance cover is opened.

11 is an enlarged plan view of a part including a fuel tank 37, a hydraulic oil tank 38, and a maintenance cover 34. FIG.

FIG. 12 is a side sectional view of a maintenance cover 34 and an inspection window 30;

FIG. 13 is a front cross-sectional view showing the relative positions of the fuel supply port 33, the bonnet 6, and the maintenance cover 34.

FIG. 14 is a perspective view showing a state in which a maintenance cover is opened.

FIG. 15 is a perspective view showing a state in which the maintenance cover is closed.

[Explanation of symbols]

 B Upper structure E Engine F Swivel frame P Hydraulic pump device S Seat 6 Bonnet 7 Radiator 34 Maintenance cover 37 Fuel tank 38 Hydraulic oil tank

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mineaki Ogata 1-32 Chaya-cho, Kita-ku, Osaka City, Osaka Inside Yanmar Diesel Co., Ltd. (72) Inventor Takeshi Koga 428 Enami, Okayama City Seirei Industry Co., Ltd. (72) Inventor Toru Sakai 428 Enami, Okayama City Inside of Sairei Industrial Co., Ltd. (56) References JP-A 4-4944 (JP, U) JP-A 60-161831 (JP, U) JP 1 -75169 (JP, U) Fully open Sho 61-84764 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02F 9/00

Claims (1)

(57) [Claims] 1. An upper structure is formed on a traveling device such that a swing frame is swingably mounted via a swing table bearing, and the swing frame, a seat, an engine, a radiator, a hydraulic pump, a fuel tank, a hydraulic oil tank, and the like are provided. A work machine operable up and down and left and right is provided at a front end of the upper structure, and at least a rear largest dimension portion of the upper structure is accommodated within a width of a traveling device. An oil tank is arranged adjacent to the fuel tank and the hydraulic oil tank, and a fuel tank is provided on the bonnet surface on the right side of the seat.
A turning work vehicle provided with an openable and closable maintenance cover for opening upper surfaces of a fuel tank and a hydraulic oil tank .