JPH09316929A - Support frame structure of working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To employ a simple structure which is strong enough to support a support frame which supports a post which supports a sunshade member in a back hoe. SOLUTION: There are provided a board 45 where a support frame 41 is laid out on the rear side of a driver's seat 13 of a swivel equipment body on both sides and which is designed to mount fixedly a sunshade member and a support post 42 which is projectingly provided from a base plate which constitutes the base part of the equipment body and is connected to one of both sides of the board 45, thereby constituting a support board 44 projectingly provided from the base plate and extended from the other sides of the base plate on both sides projectingly forward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support frame structure for a working machine used for construction machines such as backhoes.

[0002]

2. Description of the Related Art Conventionally, in a backhoe, a driver's seat is provided on a swivel rotatably supported on a traveling device about a vertical axis, and a support column for supporting an awning member is supported on the rear side of the driver's seat. A support frame is provided for. This support frame is provided on the upper and lower sides of the engine located behind the driver's seat to mount and fix the lower part of the support column that supports the sunshade member, and is provided on both left and right sides of the base plate, and the base plate at the bottom of the swivel base. It was constructed in the shape of a gate from the left and right columns that were erected from.

[0003]

In the above-mentioned conventional one, it is necessary to sufficiently secure the supporting strength of the support frame when the front and rear wind resistance acts on the shade member. In this case, since the support plate is composed of the substrate and the columns on the left and right sides thereof in a gate shape, it is difficult to say that the support strength is sufficient. In addition, the engine is arranged behind the driver's seat and the related parts of the engine are provided, and the support frame must be configured so as to avoid them, and the support frame cannot be configured in a complicated shape. .

Therefore, in view of the above problems, it is an object of the present invention to provide a support frame structure having a simple structure and sufficient support strength.

[0005]

The technical means taken by the present invention to achieve the above-mentioned object is a sunshade member which is arranged in the left and right direction behind a driver's seat on a body supported by a traveling device. A board for mounting and fixing a support pillar for supporting
A pillar that is erected from a base member that constitutes the bottom of the machine body and is connected to one of the left and right sides of the substrate, and a support plate that is erected from the base member side and that extends from the other side of the substrate in a forwardly protruding shape. It is characterized by comprising and.

Further, the support plate may be interposed between the steering device on the side of the driver's seat and the tank on the side of the steering device so that the steering device and the tank are supported by the support plate. Characterize. Further, it is characterized in that a bracket is provided in a rearward protruding shape from a middle portion in the left-right direction of the substrate, and an upper end portion of a pillar vertically provided from the base member side is connected to a protruding end portion of the bracket.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. The drawing shows a small backhoe 1 exemplified as a working machine, and in FIG. 2, the backhoe 1 is mainly composed of a traveling device 2, a turning machine body 3, and an excavating device 4.

The running direction of the backhoe 1 shown by the arrow A in FIG. 1 will be referred to as the front-rear direction, and the lateral direction shown by the arrow B orthogonal to the front-rear direction will be referred to as the left-right direction. Traveling device 2
Employs a crawler type traveling device in which a pair of left and right crawler traveling bodies 5 each having a rubber crawler are provided, and these traveling bodies 5 are driven by a traveling motor M, and a dozer 6 is provided at a front portion of the traveling device 2. Is provided.

The swivel body 3 includes a swivel base 7, and the swivel base 7.
Engine 8 and its related parts, radiator 9, hydraulic oil tank 10 for storing pressure oil of hydraulic equipment, fuel tank 11 for engine 8, these engine 8 and its related parts, radiator 9, hydraulic oil The tank 10 and the fuel tank 11 are mainly composed of a hood 12, a driver's seat 13, left and right control devices 14L and 14R, a counterweight 15, and the like.

The swivel base 7 is rotatably supported around a vertical swivel axis by a bearing body 16 provided in the center between the left and right crawler traveling bodies 5 of the traveling device 2, and the swivel body 3 is also provided. Base plate (base member) that constitutes the bottom of the
17 is provided. A reinforcing member made of a plate material and a mounting support member for various components are fixed on the base plate 17 by welding or the like to form a swivel base frame. The swivel base 7 is configured by covering the left side with a cover plate.

The counterweight 9 is attached to the rear of the swivel base 7 for balancing the weight of the excavator 4 and the like attached to the front of the swivel. The swivel base 7 is configured to be swiveled around the swivel axis by a swivel motor supported by the frame. The backhoe 1 is called a small backward swing, and the swivel body 3 is formed in a circular arc shape with the rear surface side being substantially centered on the swivel axis in plan view, and the rear surface of the swivel body is drawn when turning. The turning locus circle is designed to fit within the left and right width of the left and right crawler traveling bodies 5, and the left and right side surfaces of the turning machine body 3 are
In the state where the turning machine body 3 shown in FIG. 1 faces forward, it is formed on a surface along the front-rear direction and is formed narrower than the diameter of the turning trajectory circle drawn by the rear surface of the turning machine body, and in the same state, The front surface of the revolving unit 3 is formed in a plane extending in the left-right direction, the left side is projected forward more than the right side, and the front side of the revolving unit 3 has a pair of upper and lower support members 1 for supporting the excavation device 4.
8 are projected.

A swing bracket 19 is pivotally attached to the support member 18 via a support shaft so as to be swingable right and left around a vertical axis, and the swing bracket 19 is swingable left and right by a hydraulic cylinder (not shown). It has become. The excavator 4
Is a boom 20 whose base is pivotally attached to the pivot bracket 19 so as to be pivotable about the left-right axis, an arm 21 pivotally attached to the tip end side of the boom 20 so as to be pivotable about the left-right axis, and an arm 21. And a bucket 22 attached to the tip end side of the machine so as to be freely squeezed and dumped.

The boom 20 includes a boom cylinder 23 provided between the swing bracket 19 and a midway portion of the boom 20.
The arm 21 is rocked by the arm cylinder 24 provided between the middle part of the boom 20 and the base of the arm 21, and the bucket 22 is mounted on the base of the arm 21 and the mounting part of the bucket 22. A squeeze / dump operation is performed by a bucket cylinder 25 provided between and.

The rear upper surface and the right upper surface of the swivel base 7 are open, and these open parts are covered by a bonnet 12 projecting upward from the upper surface of the swivel base 7.
The engine 8, the radiator 9, the hydraulic oil tank 10, the fuel tank 11 and the like are housed in the bonnet 12 as described above, and these devices are attached and fixed to the swivel frame.

The hydraulic oil tank 10 and the fuel tank 11 are arranged at the front part on the right side of the swivel base 7, and the hydraulic oil tank 10 is arranged side by side so that the hydraulic oil tank 10 is on the left side and the fuel tank 11 is on the right side. A radiator 9 is arranged behind the hydraulic oil tank 10 so that the core of the radiator 9 faces the left-right direction. The engine 8 is laterally arranged laterally on the left side of the radiator 9, the radiator fan 26 rotatably driven by the engine 8 is provided on the right side of the engine 8, and the hydraulic pump 27 is provided on the left side of the engine 8.
Is provided.

The radiator fan 26 is on the right side,
That is, the air is sent toward the radiator 9, and the cooling air that has passed through the radiator 9 is cooled by the radiator 9 of the bonnet 12.
It is configured to be discharged from a discharge port formed of a large number of holes formed on the facing surface. The bonnet 12 is made of resin (or thin steel plate), and has a hydraulic oil tank 10, a fuel tank 11,
It is composed of a right side cover portion 12A that covers the radiator 9 and the radiator fan 26, an opening / closing cover portion 12B that forms the rear portion of the bonnet 12 and covers the rear of the engine 8, and a left side cover portion 12C that forms the left side of the bonnet 12. The right side cover portion 12A and the left side cover portion 12C are detachably attached and fixed to the swivel base 7 side. The open / close cover 12B is located at the center in the left-right direction and is formed symmetrically.

By dividing the bonnet 12 in this way, the radiator 9 can be completely partitioned, the radiator 9 can be cooled efficiently, and the appearance from the rear can be good in design. be able to. Further, by removing the left side cover portion 12C, the left side of the bonnet 12 is opened, and maintenance of the hydraulic pump 27 can be easily performed. Further, the division surface of the bonnet 12 (the joint portion of the bonnet structure) is reduced, the deviation due to the manufacturing distortion between the parts is improved, and the manufacturing with the rounded design is facilitated.

As shown in FIG. 7, the hydraulic oil tank 10 is provided with a level gauge 28 whose contents can be visually recognized from the outside, and the hydraulic oil tank 10 has an internal level gauge 28. A leveler 29 attached at the same position in the height direction as the proper amount scale position is provided. This leveler 29 is in a position visible from the oil filling hole 30, and while looking at this leveler 29, the oil is stored in the tank 10
It is considered that a proper amount of oil can be easily added by adding oil to.

When the radiator 9 is located on the right side of the hydraulic oil tank 10 as shown in FIG.
Since the work of connecting the suction hose to the hydraulic oil tank 10 side for sucking the pressure oil from 0 to the hydraulic pump 27 is a work at a position where parts are complicated, the work becomes difficult. Therefore, as shown in FIG. 8, the radiator 9 is arranged so as to be located on the right side of the hydraulic oil tank 10, and the hydraulic oil tank connection side of the suction hose 31 is located behind the hydraulic oil tank 10 and on the right side of the radiator 9. By connecting to the drain port side of the hydraulic oil tank 10 in the space S, by removing the right side cover portion 12A, the right side of the bonnet 12 becomes open, and the suction hose 31 can be easily assembled. It is conceivable to configure it so that it can be performed. The suction hose 31 is arranged from the space S to the hydraulic pump 27 side through the lower portion of the radiator 9.

Further, the right side cover portion 12A is formed with an opening 33 which is openably and closably closed by the inspection cover 32, and through this opening 33, the lubricating oil for the hydraulic oil tank 10 and the fuel tank 11 and the radiator are provided. The cooling water can be supplied to the water tank 9. A control device 14R is arranged on the left side of the hydraulic oil tank 10.
The driver's seat 13 is arranged on the left side of the driver's seat 13 and another control device 14L is arranged on the left side of the driver's seat 13. The right control device 14R is provided with operating levers 36 for operating the boom and the bucket, and the left control device 14L is provided with operating levers 37 for operating the swing base 7 and operating the arm. Further, in front of the driver's seat 13, a traveling lever 38 for operating the left and right traveling bodies 5 is provided.

As shown in FIGS. 1 and 3 to 6, a swivel base 7 is provided.
A support frame 41 for vertically mounting and supporting a support column 40 that supports the sunshade member 39 is mainly provided in the upright position. The support frame 41 is mainly composed of two columns 42 and 43 that form support legs, a single support plate 44, and a substrate 45, and is a three-point support. The columns 42 and 43 are made of pipe material.

The board 45 is arranged laterally behind the driver's seat 13 and above the engine 8 and has a rectangular shape that is long in the left-right direction. The lower surface of the board 45 is long in the left-right direction with a U-shaped cross section. A long reinforcing member 46 is fixed by welding. A plate 47 vertically arranged on the left end side of the reinforcing member 46.
Is fixed by welding, and the upper end of one of the columns 42 is welded and fixed to the plate 47, so that the one column 42 is connected to the substrate 45.

The upper portion of one of the columns 42 is formed so as to incline in the left-right direction from the plate 47 toward the front and is bent downward, and extends vertically from the middle portion to the downward direction. , A muffler provided on the left side of the engine 8, a pre-air cleaner, a hydraulic pump 2
It is configured to avoid 7 mag. A mounting plate 48 is welded and fixed to the lower end of one of the columns 42. The mounting plate 48 is bolted to a supporting base 49 fixed to the swivel frame, and the column 42 is erected from the base plate 17 side. ing.

A bracket 50 having a U-shaped cross section is welded and fixed to the lower portion of the reinforcing member 46 in the left-right direction in the left-right direction so as to protrude rearward. The upper ends are connected by welding. The other column 43 is formed in a straight line downward, and a mounting plate 51 is welded and fixed to the lower end of the column 43. The mounting plate 51 is bolted to a supporting table 52 fixed to the swivel frame. The column 43 is the base plate 17
It is erected from the side.

The support plate 44 is arranged vertically and is fixed to the right end of the reinforcing member 46 and the substrate 45 by welding. Further, the support plate 44 is formed so as to project forward from the substrate 45 side, and the plate width in the up-down direction increases toward the front, and the front portion thereof has the right-side control device 14R and the hydraulic oil tank. It is interposed between 10 and 10. Further, the lower part of the support plate 44 is bolted to a mounting plate 53 fixed to the swivel frame, and the base plate 1
It is erected from the 7 side, and a reinforcing member 54 is fixed to the left side surface of the support plate 44.

The right control device 1 is attached to the support plate 44.
4R and the hydraulic oil tank 10 are fixedly attached and supported. From the upper end surface to the front end surface of the support plate 44, the strip plate material 55 that closes the space between the right side control device 14R and the right side cover portion 12A is welded and fixed, and the right side cover portion 12A, the open / close cover portion 12B, and Left cover part 12C
The cover plate 56, which is formed in a butt shape with the upper surface of the cover plate 56 and is flush with the upper surface of the cover plate 56, is welded and fixed, and the cover plate 57 is disposed between the right side of the cover plate 56 and the right side control device 14R to close the space. It is arranged and attached and fixed to the reinforcing member 46.

A screw hole 58 is formed in the substrate 45, and the screw hole 58 penetrates the cover plate 56.
A fixed mounting member 59 is fixed to the lower end of the column 40 that supports the sunshade member 39 by a bolt screwed into the. The plate 6 fixed to the rear surface of the reinforcing member 46
The open / close cover 12B of the bonnet 12 is rotatably supported on the left and right shafts 60 and 61 by a hinge, and an air cleaner is attached to the left plate 60. Brackets, stays, etc. for mounting and supporting peripheral devices, the bonnet 12, etc. are mounted.

[0028]

According to the present invention, the substrate for mounting and fixing the support frame in which the support frame is arranged in the left-right direction on the rear side of the driver's seat on the machine body supported by the traveling device and supports the shade member. A pillar that is erected from a base member that constitutes the bottom of the machine body and is connected to one of the left and right sides of the board; and a pillar that is erected from the base member side and extends forward from the other side of the board. Since the supporting frame is provided with the supporting plate, the supporting frame for mounting and fixing the support columns for supporting the sunshading member has a simple structure and is capable of sufficiently supporting strength.

Further, the support plate intervenes between the control device on the side of the driver's seat and the tank on the side of the control device to support the control device and the tank on the support plate, so that the support plate is The control device and the tank supporting member are also used, and the structure around the control device and the tank can be simplified. Further, a bracket is provided so as to project rearward from an intermediate portion in the left-right direction of the board, and the upper end portion of the pillar vertically provided from the base member side is connected to the protruding end portion of the bracket, thereby further improving the support strength, Moreover, the structure is not complicated.

[Brief description of drawings]

FIG. 1 is a plan view of a turning machine body.

FIG. 2 is an overall side view of a backhoe.

FIG. 3 is a plan view of a support frame.

FIG. 4 is a rear view of the support frame.

FIG. 5 is a left side view of the support frame.

FIG. 6 is a right side view of the support frame.

FIG. 7 is a cross-sectional view of a hydraulic oil tank.

FIG. 8 is a plan view showing an arrangement of an engine, a hydraulic oil tank, and a fuel tank.

[Explanation of symbols]

 2 Traveling device 3 Revolving machine body 10 Hydraulic oil tank 14R Steering device 17 Base plate 41 Support frame 42 Strut 43 Strut 44 Support plate

Claims (3)

[Claims] 1. A board for mounting and fixing a support pillar, which is arranged in the left-right direction on a rear side of a driver's seat on a body supported by a traveling device and supports a sunshade member, and a base member constituting a bottom portion of the body. It is characterized in that it comprises a support column that is erected and connected to one of the left and right sides of the substrate, and a support plate that is erected from the base member side and that extends from the other side of the substrate in a forward projecting manner. Support frame structure for working machines. 2. The support plate is a steering device on the side of the driver's seat,
The support frame structure for a working machine according to claim 1, wherein the support frame structure is interposed between the control device and a tank on a side of the control device, and the control device and the tank are supported by a support plate. 3. A bracket is provided so as to project rearward from an intermediate portion in the left-right direction of the substrate, and an upper end portion of a pillar standing upright from the base member side is connected to a projecting end portion of the bracket. A support frame structure for a working machine according to claim 1 or 2.