JPH0932035A - Backhoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent earth or the like from falling around an opening-closing hood by arranging a bank part formed in an upward projecting shape on the edge part side of the opening-closing hood to block up an opening part of a cover. SOLUTION: An inside wall 30b extended in a curved shape so as to transfer to the outward side as it proceeds upward, is formed on an upper wall of a tank hood 20b of a bonnet of a backhoe. An outside wall 30a continuing with a rear edge wall 28 of the tank hood 20b from an upper end part is suspended from the inside wall 30b, and a bank part 30 is formed. Therefore, when earth and sand are scooped up and are turned by a bucket, the earth and sand fallen down on the tank hood 20b from the bucket can be prevented from clogging by entering between a clearance part 29, the left side edge rear side of the tank hood 20b and the left side edge of an opening part 23. The earth and sand can be prevented from accumulating between a fixed hood 20 and a boom base material by falling on the base part side of the boom base material from above the tank hood 20b.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a backhoe.

[0002]

2. Description of the Related Art In a backhoe, a fuel tank, an oil tank, etc. are provided on one side of a boom support portion of a swivel base, and these are covered with a cover body for refueling, checking, etc. There is one in which an upper opening-like opening is formed and the opening is closed by an opening / closing hood.

Further, when the swivel base is swiveling, the boom supporting portion is located rearward of the front end of the swivel base and the arm supporting the bucket is offset in the left-right direction in order to minimize the swing locus circle drawn by the bucket and the like. In some cases, the bucket can be positioned above the cover body on the side of the boom support portion.

[0004]

In the above-mentioned conventional apparatus, since the bucket is located above the cover body during turning, the earth and sand dropped from the bucket onto the opening / closing hood is opened by the opening / closing hood edge portion and the opening. The sand that has entered the open gap formed between the opening and the peripheral edge of the part and accumulates in the open gap and prevents the opening and closing of the open / close hood, or has fallen from the bucket onto the open / close hood. However, there is a problem that the hydraulic hoses for the hydraulic cylinders that fall on the boom support section side and accumulate there are caused to cause the boom, arm, and bucket to oscillate.

Further, in the latter problem, a plate which receives the earth and sand and guides it forward between the boom and the cover body in order to prevent the earth and sand from dropping from the opening / closing hood to the boom support portion side. If the space is provided, the space between the boom and the cover body becomes large, the capacity of the fuel tank and the oil tank becomes small, or the living space on the control part side on the other side of the boom support part becomes small. There are also problems.

In view of the above-mentioned problems, the present invention has a gap portion, a boom support portion, etc. in which soil or the like dropped from a bucket onto the opening / closing hood is formed between the edge portion of the opening / closing hood and the peripheral edge portion of the opening. It is an object of the present invention to provide a backhoe intended to prevent the backhoe from dropping on the opening / closing hood at a desired portion of the backhoe.

[0007]

The technical means taken by the present invention to achieve the above-mentioned object is to provide a cover body on a side of a boom support portion of a swivel base for covering a member provided on the swivel base. In a backhoe in which an opening having an upper opening formed in the cover body is openably and closably closed by an opening / closing hood, an opening / closing hood is provided on the edge side of the opening / closing hood from a bucket located above the opening / closing hood. It is characterized in that a bank portion projecting upward is provided so as to prevent the soil or the like that has dropped onto the openable hood from falling onto a desired portion around the openable hood.

Specifically, in the second aspect, on the edge side of the opening / closing hood, dirt or the like dropped from the bucket located above the opening / closing hood onto the opening / closing hood is discharged from the opening / closing hood to the opening / closing hood edge and opening. It is characterized in that a bank portion projecting upward is provided so as to prevent it from entering the opening-shaped gap portion formed upward between the peripheral portion and the peripheral edge portion. Further, in claim 3, on the edge side of the opening / closing hood, the soil or the like dropped from the bucket located above the opening / closing hood onto the opening / closing hood is prevented from falling upward to the boom support section side. It is characterized in that a bank portion formed into a protruding shape is provided.

Further, it is preferable that the opening / closing hood is formed so as to be gradually higher from the front side toward the rear side, and is supported so as to open to the front side with the front portion as a fulcrum.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show an embodiment. 5 and 6 show the entire structure of the backhoe 1, which is mainly composed of a body 2 and an excavator 3.
The machine body 2 is composed of a rubber crawler type traveling device 4 and a swivel base 5 supported on the upper part of the traveling device 4 so as to be freely swiveled around a vertical axis.
Further, a dozer 6 is provided in the front part of the traveling device 4, a cabin 7 is provided on the front left side of the upper part of the swivel base 5, and the excavation device 3 is arranged on the right side of the cabin 7. .

The excavator 3 mainly comprises a boom 8, an arm 9 and a bucket 10. The boom 8 includes a first boom member 8a whose lower side is supported by the swivel 5 so as to be rotatable about its left and right axes, and a second boom member pivotally connected to the upper portion of the first boom member 8a so as to be swingable left and right. 8b and this second
It is mainly composed of a support bracket 8c pivotally connected to the upper portion of the boom member 8b so as to be swingable left and right. A boom cylinder 11 is provided between the first boom member 8a and the swivel base 5, and the boom 8 is vertically swung by the expansion and contraction of the boom cylinder 11.

The upper end of the arm 9 is supported on the upper part of the support bracket 8c so as to be rotatable around the left and right axes.
The arm cylinder 12 interposed between the upper part of the and the support bracket 8c is expanded and contracted to swing. The bucket 10 is supported by the lower part of the arm 9 so as to be rotatable about the left and right axes, and is driven by the bucket cylinder 13 interposed between the bucket 10 and the upper part of the arm 9 to be swung in and swung.

First boom member 8a and support bracket 8c
A link link 14 is provided between the link link 14 and
And the first boom member 8a, the second boom member 8b, and the support bracket 8c constitute a parallel four-link structure, and the hydraulic cylinder 15 interposed between the first boom member 8a and the second boom member 8b serves as a first link. By swinging the two boom members 8b, the arm 9 and the bucket 10 can be moved in parallel in the left-right direction.

The swivel base 5 has a substantially circular shape in which a front portion is cut out in a plan view, and a cabin 7 on the swivel base 5 is provided.
A boom support portion 21 is provided on the right side of the first boom member 8a, and the base portion of the first boom member 8a is pivotally supported between a pair of left and right support plates 22 provided on the boom support portion 21. As shown in FIG. The device 3 is designed to fit within the turning range of the swivel base 5.

On the right side of the boom support portion 21 on the swivel base 5, as shown in FIG. 2, the fuel tank 16 and the hydraulic motors for the hydraulic cylinders and the drive unit of the traveling device 4 are provided. An oil tank 17 and the like are arranged, and an engine 18 and a radiator 19 and the like are arranged at a rear portion on the swivel base 5. The fuel tank 16, the oil tank 17, the engine 18 and the radiator 19 and the like are made of a resin bonnet 20.
Covered by

An opening is formed in the boom support portion 21 at a portion corresponding to the lower end portion of the first boom member 8a between the left and right support plates 22, and is located inside the swivel base 5 through this opening portion. A hydraulic hose that sends pressure oil from the control valve to the boom cylinder 11, the arm cylinder 12, the bucket cylinder 13 and the like is arranged on the back side of the first boom member 8a.

The bonnet 20 includes an engine hood 20a for covering the rear portion of the engine 18 and its periphery, a tank hood (opening / closing hood) 20b for covering the upper side of the fuel tank 16 and the oil tank 17, and other portions (the engine 18).
Side and front of the fuel tank 16 and the oil tank 1
Fixed hood (cover body) that covers the side and front of 7)
The fixed hood 20c is mounted and fixed on the swivel base 5, and the engine hood 20a and the tank hood 20b are openably and closably mounted on the fixed hood 20c.

The structure of the right side portion of the bonnet 20 (the right side portion of the boom support portion 21) will be described in more detail. Maintenance and refueling of the fuel tank 16 and the oil tank 17 and the like are performed above the right side portion of the fixed hood 20c. An opening 23 is formed in an upward opening shape, and the tank hood 20b is closed by the opening 23. The tank hood 20b has a left side edge portion formed by a pair of front and rear hinges 24 on the right side portion of the fixed hood 20c. It is openable and closable by being attached to the side wall of the so as to be rotatable around the front-rear axis.

Further, as shown in FIGS. 3 and 4, the tank hood 20b is bent in a curved shape so that its front portion moves downward as it goes forward, and the right side portion thereof extends outward in the left-right direction. Therefore, it is bent in a curved shape so as to move downward. Therefore, the tank hood 2
0b from the bucket 10 located above the tank hood 2
The earth and sand falling on 0b can easily flow forward and laterally outward.

A sealing material is provided around the entire periphery of the opening 23, and the tank hood 20 is attached to the sealing material.
By contacting the peripheral edge of b from above, the opening 23
A seal is provided between the peripheral edge and the peripheral edge of the tank hood 20b. As shown in FIG. 1, the rear edge of the opening 23 is formed by bending the rear edge of the fixed hood 20 c toward the inside of the hood 20. The tip end side of the bent wall 25 forming the edge portion is bent toward the inner side of the opening 23 to form a sealing material mounting portion 26, and the sealing material mounting portion 26 has the periphery of the opening 23 and the tank hood described above. A sealing material 27 that seals the periphery of 20b is fitted and fixed.

On the other hand, at the rear edge of the tank hood 20b,
A bent wall 25 which is located on the inner side of the hood 20 from the upper surface of the tank hood 20b and constitutes the rear edge of the opening 23.
Is provided with a rear edge wall 28 facing in the front-rear direction.
The tip end side of 8 is bent toward the inner side of the opening 23 to form an abutment portion 28a that abuts on the sealing material 27, and a folding edge forming a rear edge portion of the opening 23 is formed. Curved wall 2
An open gap 29 is formed between the tank 5 and the rear edge wall 28 of the tank hood 20b toward the upper side.

A bank 30 projecting upward is formed on the rear edge side of the tank hood 20b and the rear edge side of the left side edge (upper side of the left edge). When the bucket 10 is positioned above the tank hood 20b when the bucket 10 scoops and turns the sand and sand with the bucket 10, the spilled earth and sand from the bucket 10 onto the tank hood 20b is generated in the gap portion 29. , And to prevent clogging by entering the gap between the rear side of the left side edge of the tank hood 20b and the left side edge of the opening 23, and from the top of the tank hood 20b to the base side of the first boom member 8a. Are prevented from falling and accumulating in the space 31 between the fixed hood 20c and the base portion of the first boom member 8a.

The bank 30 is composed of a rear portion, that is, a portion corresponding to the rear edge portion of the tank hood 20b, and a side portion continuous to the rear portion, that is, a portion corresponding to the left edge portion of the tank hood 20b. There is. In addition, the bank 30
An inner wall 30b integrally formed with the tank hood 20b and extending in a curved shape so as to move outward from the upper wall of the tank hood 20b toward the upper side.
And the outer wall 3 which is vertically provided on the inner wall 30b and which is continuous with the rear edge wall 28 or the left edge wall of the tank hood 20b.
0a, and the bank 30 has a substantially triangular cross section.

The gap 29 on the right side (lower side) between the bent wall 25 and the trailing edge wall 28 is curved so as to move downward as the tank hood 20b moves outward in the left-right direction. Since it is bent into a shape, it is formed along this shape, and is inclined downward and is also open to the right side, so the bank portion 30 corresponding to that portion is not so much. It is not necessary, and the bank 30 is at least the bent wall 25.
It suffices that it is formed so as to correspond to the gap portion 29 on the left side (upper side) between the rear edge wall 28 and the rear edge wall 28.

The bank 29 does not have to be formed integrally with the tank hood 20b, but can be formed as a separate body.
It may be fixed on the upper surface of 0b. Also, the height H of the bank 30
15 mm or more is effective. Further, the bank 30 can increase the strength of the tank hood 20b. 7 to 10 show another embodiment, in which the side of the bank 30 is formed longer toward the front than the one embodiment, and the tank hood 20b to the fixed hood 20c and the first boom are formed. The drop of earth and sand from the space 31 between the base of the member 8a and the boom support 21 is reliably prevented, and the rear part of the bank 30 is between the rear edge of the tank hood 20b and the rear edge of the opening 23. Left side of the gap portion 29 of the tank hood 20
The upper surface of b is formed corresponding to the gap portion 29 of the portion formed along the left-right direction.

Further, the lower part of the front end of the tank hood 20b is rotatably attached to and supported around the front edge portion of the opening 23 of the fixed hood 20c via a hinge 32 so that the tank hood 20b opens to the front side. It is configured to remove the earth and sand remaining on the tank hood 20b forward. The right side portion of the fixed hood 20c is fixed to the right side support plate 22, and the left side support plate 22
The canopy 33 (the cabin 7 in the above-described embodiment) is attached and fixed to the first boom member 8a because the bank portion 30 can prevent earth and sand from falling toward the base side of the first boom member 8a. 8a and a tank hood 20b between the base and the tank hood 20b.
0b and the fixed hood 20c, the space L1 is narrowed, and the space L1 is formed to have the same size as the space L2 between the base of the first boom member 8a and the canopy 33. Can the space be increased to increase the capacity of the tank, or the driver's seat and the excavator 3,
The living space of the control unit 34 including the operation lever of the traveling device 4 and the like can be widely taken.

Further, by forming the tank hood 20b in a hollow shape by a rotational molding, it is possible to reduce the impact force of earth and sand, stones, etc. falling from the bucket 10 onto the tank hood 20b.

[0028]

According to the present invention, a cover body for covering a member provided on the swivel base is provided on the side of the boom support portion of the swivel base, and an opening portion having an upward opening formed in the cover body is provided. In a backhoe configured to be openably and closably closed by an opening / closing hood, on the edge side of the opening / closing hood, soil or the like that has fallen onto the opening / closing hood from a bucket located above the opening / closing hood is removed from the opening / closing hood. Around the desired part, that is, between the hood edge of the opening / closing hood and the peripheral edge of the opening, the opening-like gap is directed upward and the upper part of the boom supporting part is prevented from falling downward. By providing the protruding bank portion, even if soil or the like spills from the bucket onto the opening / closing hood during backhoe work, the soil or the like is formed between the opening / closing hood edge and the peripheral edge of the opening. The gap Entering the can prevent the bank portion,
It is possible to prevent the problem that soil and the like accumulate in the gap and it becomes difficult to open and close the opening and closing hood, and the soil and the like that has fallen from the bucket onto the opening and closing hood falls to the boom support side and is there. Accumulation can be prevented by the bank portion, damage to the hydraulic hose for the hydraulic cylinder used in the excavator can be prevented, and soil that falls between the boom mounting base and the open / close hood can be received and guided forward. The space between the mounting base of the boom and the opening / closing hood can be made narrower as compared to the case where the plate is interposed, whereby the storage space of the cover body on the side of the boom support can be made wider.

Further, the opening / closing hood is formed so as to be gradually higher from the front to the rear, and is supported so as to open to the front side with the front part as a fulcrum, so that the opening / closing hood is closed when the opening / closing hood is closed. Makes it easy to drop the soil that falls onto the front, and when opening the opening / closing hood, drops the soil remaining on the opening / closing hood to the front side to prevent it from falling to the boom support side. it can.

[Brief description of drawings]

1 is a cross-sectional view taken along the line AA of FIG.

FIG. 2 is a plan view of a backhoe body according to one embodiment.

FIG. 3 is a left side view of the backhoe body according to the embodiment.

FIG. 4 is a rear view of the backhoe body according to the embodiment.

FIG. 5 is an overall side view of the backhoe according to the embodiment.

FIG. 6 is an overall plan view of a backhoe according to one embodiment.

FIG. 7 is a left side view of a backhoe body according to another embodiment.

FIG. 8 is a plan view of a backhoe body according to another embodiment.

FIG. 9 is a front view of a backhoe according to another embodiment.

FIG. 10 is a rear view of a backhoe according to another embodiment.

[Explanation of symbols]

 5 swivel base 10 bucket 20b tank hood (opening / closing hood) 20c cover body (fixed hood) 21 boom support portion 23 opening portion 29 gap portion 30 bank portion

Claims (4)

[Claims] 1. A cover body for covering a member provided on the swivel base is provided on a side of a boom support portion of the swivel base, and an upper opening-shaped opening formed in the cover body can be opened and closed by an opening / closing hood. In the closed backhoe, on the edge side of the opening / closing hood, soil or the like that has fallen from the bucket located above the opening / closing hood onto the opening / closing hood falls onto the opening / closing hood to a desired portion around the opening / closing hood. A backhoe, which is provided with a bank portion projecting upward so as to prevent it from coming off. 2. A cover body for covering a member provided on the swivel base is provided on a side of the boom support portion of the swivel base, and an upper opening-shaped opening formed in the cover body can be freely opened and closed by an opening / closing hood. In the closed backhoe, on the edge side of the opening / closing hood, soil or the like dropped from the bucket located above the opening / closing hood onto the opening / closing hood is separated from the opening / closing hood by the edge of the opening / closing hood and the periphery of the opening. A backhoe, wherein a bank portion projecting upward is provided so as to prevent it from entering an opening-shaped gap portion formed upward between the bank and the portion. 3. A cover body for covering a member provided on the swivel base is provided on a side of a boom support portion of the swivel base, and an upper opening-shaped opening formed in the cover body can be freely opened and closed by an opening / closing hood. In the closed backhoe, on the edge side of the opening / closing hood, it is possible to prevent soil or the like that has fallen onto the opening / closing hood from the bucket located above the opening / closing hood from falling on the boom support section side. A backhoe characterized in that it has a protruding bank portion above it. 4. The opening / closing hood is formed so as to be gradually higher from the front side toward the rear side, and is supported so as to open to the front side with the front portion as a fulcrum. Backhoe.