JP3176789B2 - Swiveling work vehicle - Google Patents

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 fuel tank and a gauge port for extracting pressure in a turning work vehicle such as a backhoe.

[0002]

2. Description of the Related Art Conventionally, a technique relating to a turning type work vehicle is known. For example, Japanese Utility Model Laid-Open No. 59-73
461 and Japanese Utility Model Laid-Open No. 62-38972.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a revolving work vehicle in which a fuel tank is arranged on the side of the seat on the side of getting on and off the seat, and a hydraulic pump attached to the engine is arranged below the fuel tank. Therefore, when a problem occurs in the engine, the hydraulic pump, or the like, it is necessary to remove the fuel tank. In such a case, the fuel tank is easily attached and detached, and the elastic seal for sealing between the fuel tank and the bonnet is prevented from being damaged. In addition, the handle gripped when getting on and off the seat is also used as a handle when the fuel tank is detached. In addition, a gauge port for pressure extraction for inspecting the level of pressure oil to each working machine is provided in the piping member between the control valve and the working machine, so that pressure can be easily tested. is there.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. According to the first aspect of the present invention, in a revolving work vehicle having a revolving radius of about half or less of the vehicle width and a revolving frame F of a substantially circular shape, a fuel tank T is disposed on a side of a seat. The shape of the outer end is configured and arranged in an arc shape along the revolving frame F, and the fuel tank T is detachable on the upper surface of the revolving frame F.

According to a second aspect of the present invention, a handle 5 for an operator to get on and off the seat 18 is disposed above the fuel tank T, and the handle 5 is detached when the fuel tank T is detached from the revolving frame F. It is also used as a handle.

According to a third aspect of the present invention, at the joint between the bonnet 6 and the fuel tank T, the edge of the bonnet 6 is covered outside the edge of the fuel tank T, and an elastic seal 7 is provided between the edges. When the fuel tank T is removed and the fuel tank T is removed, the elastic seal 7 can avoid the edge of the bonnet.

According to a fourth aspect of the present invention, in a turning type work vehicle having a plurality of hydraulic pumps, at least one or more of a circuit of one or more working machine cylinders connected to each hydraulic pump via a control valve. A pressure extracting gauge port is provided in a piping member between the control valve and the working machine cylinder in the circuit of (1).

[0008]

Next, the operation will be described. According to the first aspect, when a failure occurs in the hydraulic pump P disposed near the fuel tank T, the engine E, or the like, the fuel tank T can be removed to perform inspection and repair of the part. . Since the position of the fuel tank T can be used as a space for inspection and repair, the engine E, the hydraulic pump P, and the fuel tank T can be arranged close to each other, so that the diameter of the turning frame F can be reduced. The turning radius can be further reduced.

According to the second aspect, the handle 5 for getting on and off the vehicle and the handle for attaching and detaching the fuel tank T can also be used, and it is not necessary to provide both separately. Also handle 5
The work of attaching and detaching can now be easily done alone.

According to the third aspect, when the fuel tank T is attached or detached, the elastic seal 7 that seals the space between the fuel tank T and the bonnet 6 is not damaged, and the fuel tank T is attached and detached frequently. In addition, the necessity of replacing the elastic seal 7 is reduced.

According to a fourth aspect of the present invention, the bonnet 6
It is not necessary to insert the tip of the pipe of the pressure measurement gauge to the vicinity of the hydraulic pump P in the inside of the pump, and the measurement work of the pressure measurement gauge can be easily performed at the pressure extraction gauge port provided in the block portion provided outside the body. Therefore, the cause of the malfunction of the hydraulic system can be easily clarified.

[0012]

Next, an embodiment will be described. 1 is a side view of a turning work vehicle of the present invention, FIG. 2 is a front view of the turning work vehicle, FIG. 3 is a plan view of the turning work vehicle, FIG. 4 is a fuel tank T, a bonnet 6 and an engine E. 5 is a sectional plan view of the fuel tank T, the bonnet 6 and the engine E, FIG. 6 is a plan view of the fuel tank T, the bonnet 6 and the hydraulic oil tank 10, and FIG. FIG. 8 is a perspective view of a state in which the fuel tank T is detached from the revolving frame F and the handle 5 is lifted up, FIG. 8 is a plan view of the fuel tank T, FIG. 11 is a side view of a portion of the fuel tank T and the revolving frame F, FIG. 11 is a cross-sectional view showing the upper surface elastic seal 7 between the fuel tank T and the edge of the bonnet 6, and FIG. Of the elastic seal 7 on the vertical surface of the part FIG. 13 is a side view of a configuration in which a pressure extracting gauge port 13 is provided in a blade cylinder 12 of a blade 11, FIG. 14 is a plan view in which a pressure extracting gauge port 13 is similarly provided in the blade cylinder 12, and FIG. Cylinder 1
4 is a drawing showing a pressure takeout gauge port 17 for 4 and a pressure takeout gauge port 15 provided in an arm cylinder pipe 16, FIG. 16 is a side sectional view showing a fixed portion at the rear of the floor elastic mat 23, and FIG. FIG. 18 is a side sectional view of a front portion showing a fixing portion of the floor elastic mat 23, and FIG.

Referring to FIGS. 1, 2 and 3, the overall structure of the turning type working vehicle will be described. A revolving frame F is rotatably supported above the crawler traveling device 8 via a revolving table bearing. A boom pivot 19 is provided on the entire turning frame F, and the lower end of the main boom 20 is pivotally supported by the boom pivot 19. A bucket arm 21 is pivotally supported at the upper end of the main boom 20, and a bucket 22 is pivotally supported at the tip of the bucket arm 21. A boom cylinder 14 for rotating the main boom 20 up and down, an arm cylinder 24 for rotating the bucket arm 21, and a bucket cylinder 25 for rotating the bucket 22 are arranged.

An operating lever stand 1 is provided upright at the rear of the main boom 20, and an operating section guide rod 3 is provided upright at the front of the operating lever stand 1. The operation lever 4 protrudes from the operation lever stand 1 and the traveling lever 2 protrudes. A seat 18 is arranged at the rear of the operation lever stand 1 with a floor elastic mat 23 interposed therebetween.
The seat 18 is arranged in a seat fitting hole provided in the hood 6. A fuel tank T, which is a main part of the present invention, is arranged on the side of the seat 18 on the side of getting on and off. A handle 5 is provided upright on the upper part of the fuel tank T. A canopy 9 is erected above the hood 6.

Next, referring to FIG. 4 and FIG.
And the configuration of a conventional pressure extraction gauge port will be described. The engine E is disposed at the rear portion of the seat 18 inside the hood 6 with the right side inclined slightly rearward. A flywheel 27 is provided on the left side of the engine E, and a plurality of hydraulic pumps P are mounted on a shaft protruding from the flywheel 27. Conventionally, pressure extraction gauge ports 29, 30 for checking the hydraulic pressure to each working machine cylinder.
Is screwed on the upper surface of the case of the hydraulic pump P, and measurement is performed by screwing the tip of a pressure measuring gauge into the pressure extracting gauge ports 29, 30. Therefore,
When the pressure gauge is mounted, the bonnet 6 must be removed each time, and the pressure measurement by the pressure gauge is troublesome. In the present invention, the pressure extracting gauge port is provided on a pipe or a joint portion outside the bonnet 6 near the working machine cylinder to facilitate the measurement by the pressure measuring gauge.

4 and 5, the arrangement of the fuel tank T, the engine E and the hydraulic pump P will be described. Fuel tank T
Is configured such that a space 34 is provided below, and a hydraulic pump P projecting from the engine E can be fitted and arranged in this portion. Therefore, when a failure occurs in the engine E or the hydraulic pump P, it is necessary to remove the fuel tank T and perform inspection and repair of the failed portion, and there is a high possibility that the fuel tank T will be detached. The present invention uses this fuel tank T
The handle is provided on the upper surface of the fuel tank T as a handle for attaching and detaching the fuel tank and a handle 5 for the operator to get on and off the seat 18. A fuel supply port 28 is also provided on the upper surface of the fuel tank T.

Next, the structure of the fuel tank T will be described with reference to FIGS. 6, 7, 8, 9 and 10. That is, although the fuel tank T is formed of an iron plate, its outer wall is exposed in an arc shape along the turning frame F, and also functions as a bonnet. A fuel supply port 28 and a handle 5 are provided on an upper surface of the fuel tank T, and a space 34 is provided in a raised floor shape at a lower portion, and a hydraulic pump P attached to the engine E is located in the space 34. ing. Brackets 35 and 36 are provided below the fuel tank T. The brackets 35 and 36 are placed on the turning frame F, and the turning frame F and the fuel tank T are fixed by bolts. I have. Therefore, when attaching and detaching the fuel tank T, it is necessary to attach and detach the bolts at this portion. Seat 1
A hydraulic oil tank 10 is arranged on the right side of 8.

The inner wall portion of the fuel tank T is projected toward the space above the flywheel 27 of the engine E, and the upper portion of the projected portion 37 has a concave portion 33 for arranging the seat 18. Is configured. Above the concave portion 33, a bonnet 6 also provided with a concave portion 38 is arranged. The bonnet 6 and the edge of the fuel tank T are overlapped to improve the design performance, and the bonnet 6 is configured to be covered on the outside of the edge of the fuel tank T.

An elastic seal is interposed at an overlapping portion of the edge of the fuel tank T and the bonnet 6 to prevent noise due to vibration and to prevent rainwater from entering. FIG. 11 shows a configuration of the elastic seal 7 in the horizontal plane of the upper surface portion of the bonnet 6 and the fuel tank T. FIG.
As shown in the drawing on the right side, in the case of the parallel two-stage elastic seal 40, if the bolts of the fuel tank T are removed and the fuel tank T is pulled out by holding the handle 5, Of the bonnet 6 is broken by being hooked on the bent edge 6a at the tip of the bonnet 6. In the present invention, in order to solve the problem of breakage of the two-stage elastic seals 40 in parallel, as shown in the left diagram of FIG. is there. As described above, even in the elastic seal 7 having two stages in series horizontally, the concave portion 38 is formed in the bonnet 6 in this portion, so that the elastic seal 7 can be in good contact with the elastic seal 7. Therefore, when the fuel tank T is pulled out, the elastic seal 7 is not damaged by forming the elastic seal 7 in two stages in series horizontally.

Referring to FIG. 12, the elastic seal 40 provided at the rear vertical edge of the bonnet 6 and the fuel tank T will be described. The elastic seals 40
The elastic seal of the step is configured, but after removing the bolt fixing the fuel tank T, the fuel tank T
Is moved to the side, the two-stage elastic seals 40 can be taken out in a state where they are not engaged with the vertical bent edges 6b of the bonnet 6. This is because the fuel tank T has a margin on the side and can be moved laterally to remove the interference state of the elastic seal 40 when the fuel tank T is pulled out first. Since the position of the lower surface of the fuel tank T is determined by the revolving frame F, the portion of the above-described two-stage elastic seal 40 cannot be pulled out by being drawn downward. It is necessary to change to the elastic seal 7. With the above configuration, the fuel tank T, the edge, and the bent edge 6
The elastic seal interposed between the a and 6b can be taken out without damage.

Next, referring to FIG. 13, FIG. 14, and FIG. 15, a description will be given of a pressure extracting gauge port for measuring the hydraulic pressure of the working machine cylinder with a pressure measuring gauge. Conventionally, as described with reference to FIGS. 4 and 5, a tapered screw hole for screwing a joint is formed on the upper surface of the case of the hydraulic pump P, and a joint at the tip of a pipe for a pressure measurement gauge is screwed into the hole. I was measuring. However, the position of the hydraulic pump P is inside the bonnet 6 and the fuel tank T
The measurement work cannot be done alone because it is located below In the present invention, a pressure port gauge port is provided in a pipe, a joint, or a block between the hydraulic pump P, the control valve, and the working machine cylinder.

In FIG. 13 and FIG.
FIG. 2 shows a pressure extraction gauge port 13 for measuring the pressure of a blade cylinder 12 that moves up and down. In this case, a pressure extraction gauge port 13 is opened on the side of a joint block 41 provided for connecting a pipe to the side surface of the blade cylinder 12. The pressure extraction gauge port 13 is normally closed by a blind bolt. FIG.
3 shows the pressure extraction gauge port 17 when measuring the pressure of the boom cylinder 14 that rotates the main boom 20. Also in this case, the boom cylinder 14
A joint block 42 for fixing a pipe is fixed to a side surface of the pressure gauge. A pressure extracting gauge port 17 for fixing a joint of a pressure measurement gauge is formed in the joint block 42.
It is usually closed by blind bolts.

The upper part of FIG.
The pressure take-out gauge port 15 of the arm cylinder 24 that rotates the motor 1 is described. In this case, since the arm cylinder 24 is located on the upper side, it is difficult to perform measurement with the pressure measurement gauge even if the arm cylinder 24 is provided directly on the upper arm cylinder 24.
The joint block 43 is arranged in the middle of the above, and the pressure extraction gauge port 15 is bored in the joint block 43. A part of the joint block 43 is fixed by a fixing bracket 44.
Since it is fixed to the main boom 20, the oil feed pipe 16 does not move when the pipe tip of the pressure measurement gauge is screwed into the portion.

Next, a method for fixing the floor elastic mat 23 placed on the step portion will be described with reference to FIGS. The floor elastic mat 23 is placed on the step S. If the floor elastic mat 23 is not fixed to some extent, the floor elastic mat 23 gradually shifts from the step S. It is. However, fixing the floor elastic mat 23 with bolts as in the related art complicates the assembling work. In this configuration, a folded portion 46 is provided at the front end of Step S, and a folded portion 45 is also provided at the rear end of Step S, and the folded portion 45 is attached to the floor elastic mat 2.
3, the folded portions 45 and 4
6, the front and rear ends of the floor elastic mat 23 are inserted so as to be easily fixed. Since the floor elastic mat 23 is made of rubber or the like, the floor elastic mat 23 can be inserted in a front and rear order in a bent state.

[0025]

As described above, the present invention has the following advantages. In a revolving work vehicle having a revolving radius of approximately half or less of the vehicle width and a revolving frame F being substantially circular, the fuel tank T is disposed on a side of a seat. Is arranged and arranged in an arc shape along the turning frame F, and the fuel tank T is detachable on the upper surface of the turning frame F. Therefore, the hydraulic pumps P and When a failure occurs in the engine E or the like, the inspection and repair of the portion can be performed by removing the fuel tank T. Since the position of the fuel tank T can be used as a space for inspection and repair, the engine E, the hydraulic pump P, and the fuel tank T can be arranged close to each other, so that the diameter of the turning frame F can be reduced. Therefore, the turning radius can be further reduced.

As described in claim 2, on the upper part of the fuel tank T,
The handle 5 for the operator to get on and off the seat 18 is arranged, and the handle 5 is also used as a detachable handle for attaching and detaching the fuel tank T to and from the revolving frame F. The handle for attaching and detaching the tank T can also be used, and it is not necessary to provide both separately. In addition, the work of attaching and detaching the handle 5 can be easily performed by one person.

According to a third aspect of the present invention, the joint between the bonnet 6 and the fuel tank T is configured to cover the edge of the bonnet 6 outside the edge of the fuel tank T, and an elastic seal is provided between the edges. In the operation of removing the fuel tank T while interposing the fuel tank 7, the elastic seal 7 can avoid the edge of the bonnet when attaching and detaching the fuel tank T. Tank T and bonnet 6
The elastic seal 7 that seals the space between the fuel tank T and the fuel tank T is not damaged, and the necessity of replacing the elastic seal 7 is reduced even when the fuel tank T is frequently attached and detached.

According to a fourth aspect of the present invention, in a turning work vehicle having a plurality of hydraulic pumps, at least one of the circuits of one or more working machine cylinders connected to each hydraulic pump via a control valve. Since the pressure extracting gauge port is provided in the piping member between the control valve and the working machine cylinder of the above circuit, the tip of the pressure measuring gauge pipe is extended to the vicinity of the hydraulic pump P inside the bonnet 6 as in the related art. It is not necessary to insert the pressure gauge, and the pressure measurement gauge can be easily measured at the pressure extraction gauge port provided in the block part provided outside the fuselage, so the cause of the malfunction of the hydraulic system can be easily clarified. is there.

[Brief description of the drawings]

FIG. 1 is a side view of a turning work vehicle according to the present invention.

FIG. 2 is a front view of the turning type work vehicle.

FIG. 3 is a plan view of the revolving work vehicle.

FIG. 4 is a rear sectional view of a portion including a fuel tank T, a bonnet 6, and an engine E;

FIG. 5 is a plan sectional view of a portion including a fuel tank T, a bonnet 6, and an engine E;

FIG. 6 shows a fuel tank T, a bonnet 6, and a hydraulic oil tank 1.
FIG.

FIG. 7 is a perspective view showing a state in which the fuel tank T is detached from the revolving frame F, and the handle 5 is held up and lifted.

FIG. 8 is a plan view of a fuel tank T.

FIG. 9 is a rear view of a part including a fuel tank T and a turning frame F.

FIG. 10 is a side view of a fuel tank T and a turning frame F.

FIG. 11 is a cross-sectional view showing the elastic seal 7 on the upper surface between the fuel tank T and the edge of the bonnet 6;

FIG. 12 is a cross-sectional view of an elastic seal 7 on a vertical surface of an edge of the fuel tank T and the bonnet 6;

FIG. 13 is a side view of a configuration in which a pressure takeout gauge port 13 is provided in a blade cylinder 12 of a blade 11;

FIG. 14 is a plan view showing the blade cylinder 12 provided with a pressure extraction gauge port 13;

FIG. 15 is a drawing showing a pressure extraction gauge port 17 for the boom cylinder 14 and a pressure extraction gauge port 15 provided in the arm cylinder pipe 16;

FIG. 16 is a side sectional view showing a fixing portion at the rear of the floor elastic mat 23;

FIG. 17 is a side sectional view of a front portion showing a fixing portion of the floor elastic mat 23.

18 is a plan view showing a fixed state of the floor elastic mat 23. FIG.

[Explanation of symbols]

 T Fuel tank P Hydraulic pump S Step 1 Operation lever stand 5 Handle 6 Bonnet 6a, 6b Folded edge 7 Elastic seal 13 Gauge port for pressure extraction 18 Seat 23 Floor elastic mat

Continuation of the front page (56) References JP-A-6-294146 (JP, A) JP-A 6-27463 (JP, U) JP-A 58-111256 (JP, U) JP-A 61-89062 (JP , U) Hira 4-30246 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02F 9/00 E02F 9/16

Claims (4)

(57) [Claims] The turning radius is set to be approximately one half or less of the vehicle width,
In a revolving work vehicle having a revolving frame F having a substantially circular shape, a fuel tank T is disposed on a side of a seat, and an outer end of the fuel tank T is formed and arranged in an arc shape along the revolving frame F. A turning-type work vehicle, wherein a fuel tank (T) is detachable from an upper surface of a turning frame (F). 2. A turning work vehicle according to claim 1, wherein a handle for an operator to get on and off the seat is disposed above the fuel tank. A turning type work vehicle, which is also used as a detachable handle when detaching from the F. 3. The swiveling work vehicle according to claim 1, wherein a joint portion between the bonnet 6 and the fuel tank T is formed so as to cover the edge of the bonnet 6 outside the edge of the fuel tank T. In the operation of removing the fuel tank T, the elastic seal 7 can avoid the edge of the bonnet when attaching and detaching the fuel tank T in the operation of removing the fuel tank T between the parts. Swiveling work vehicle. 4. A turning work vehicle having a plurality of hydraulic pumps, wherein at least one of the circuits of one or more working machine cylinders connected to each hydraulic pump via a control valve is provided. A turning type work vehicle, wherein a pressure extracting gauge port is provided in a pipe member between a control valve and a work machine cylinder.