JP2002115267A - Swing construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a swing construction machinery capable of mounting a carburetor on a swing frame having a notch section on the left front side for reducing weight with sufficient rigidity. SOLUTION: The swing construction machinery is so constituted that mount members 40, 41 and 42 are arranged on a left backward section, a right backward section and a right forward section with a driver's seat 19 in the swing frame 6 as the reference and that corner sections on a left rear side, a right rear side and a right front side of the carburetor 26 are mounted to the swing frame 6 by using these three mount members 40, 41 and 42. By the constitution, it is designed on the assumption that e.g. an eave-shaped canopy for covering the upper side of the driver's seat 19 is used for the standard equipment, and the carburetor 26 can be mounted to a site with high strength except the notch section A in the swing frame 6 with high rigidity by using these three mount members 40, 41 and 42 even for the swing frame 6 making the left front side as the notch section A for reducing weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing type construction machine such as a hydraulic shovel suitable for use in excavation work of earth and sand, for example, and more particularly, to a swing type construction machine in which a swing radius of an upper swing body is reduced. About.

[0002]

2. Description of the Related Art Generally, a hydraulic shovel as a revolving construction machine used for excavation work of earth and sand, etc., has a lower traveling body provided with crawler tracks on both the left and right sides, and is mounted on the lower traveling body so as to be pivotable. An upper revolving structure is provided, and a working device is provided at the front of the upper revolving structure so as to be able to move up and down.

Here, a relatively large hydraulic excavator has a cab mounted on the left front side of a revolving frame constituting an upper revolving body, and the cab covers a driver's seat. In order to mount the cab on the revolving frame, usually, four mounting members are disposed between the left front side, the right front side, the left rear side, and the right rear side corner of the cab and the revolving frame. (For example, JP-A-9-71970).

On the other hand, a small hydraulic excavator called a mini excavator having a vehicle weight of about 2 to 3 tons is known for use in excavation work in, for example, a narrow alley. And
Among small hydraulic shovels of this type, a rear small turning hydraulic shovel is formed in a substantially circular shape with the rear side of the upper revolving structure centered on a revolving center.
The rear side of the upper revolving structure has a width of 1.
It is configured to fit within a double virtual circle.

Here, the small-sized hydraulic excavator as described above is usually equipped with a canopy as a standard for covering the driver's seat from above, and this canopy is lighter in weight than a cab. For this reason, in a small-sized hydraulic excavator on the premise that a canopy is provided as a standard feature, a notch is provided on the left front side of a turning frame on which a load such as a canopy does not act.

[0006]

By the way, it is conceivable to mount a cab in place of the canopy on the small hydraulic excavator as described above. However, it is necessary to secure an appropriate working space inside the cab. In addition, there is a limit to downsizing of the cab.

For this reason, when the cab is mounted on the turning frame of the small hydraulic excavator, the left front side of the cab projects greatly from the left front side of the notched turning frame. There is a problem in that it is difficult to mount on the revolving frame via the mounting member.

On the other hand, it is conceivable that a bracket is fixedly provided on a revolving frame and the left front side of the cab is mounted on a mounting member provided on the bracket. However, in this case, it is difficult to provide the bracket with sufficient strength to support the weight of the cab, so that the cab cannot be mounted on the revolving frame with sufficient rigidity. There is a problem that it becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and provides a swivel type construction machine capable of mounting a cab with sufficient rigidity on a swivel frame having a cut-out portion on the left front side. It is intended to be.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a lower traveling body and an upper revolving body which is pivotably provided on the lower traveling body. A turning frame composed of a support structure having a notch formed by cutting a left front side, an engine provided on the rear side of the turning frame, and a driver seat located on the front side of the engine and provided on the turning frame; And a floor plate provided around the driver's seat including the notch portion of the revolving frame.

A feature of the structure adopted in the first aspect of the present invention is that a cab that covers the periphery of the driver's seat is provided on the upper revolving structure, and the revolving frame is provided with the cab at at least three places excluding the notch. That is, a mounting member for mounting the cab is provided.

With this configuration, the cab can be attached to a high-strength portion of the revolving frame except for the cutout portion by using at least three mount members. For this reason, the cab can be attached with sufficient rigidity to the revolving frame having the notch on the left front side, and the weight of the revolving frame can be reduced.

According to a second aspect of the present invention, the mount member is provided at four positions of the revolving frame except for the notch.

With this configuration, the cab can be attached to the high-strength portion of the revolving frame excluding the cutout portion by using four mount members.
The cab can be mounted on the revolving frame with great rigidity.

According to a third aspect of the present invention, the mount member is provided in a left rear portion, a right rear portion, a right front portion, and a front portion of the revolving frame with respect to the driver's seat.

[0016] With this configuration, in addition to the mount members provided at the left rear portion, the right rear portion, and the right front portion of the driver's seat in the turning frame, the mount members provided at the front portion of the driver's seat are used. The cab can be attached to the revolving frame, and the cab can be stabilized.

According to a fourth aspect of the present invention, the mount member is provided on the left rear portion, the right rear portion, the right front portion, and the left side portion of the revolving frame with respect to the driver's seat.

[0018] With this configuration, in addition to the mount members provided on the left rear portion, the right rear portion, and the right front portion of the driver's seat, the mount members provided on the left side of the driver's seat are used. The cab can be attached to the revolving frame to stabilize the cab.

According to a fifth aspect of the present invention, the cab is provided with a door pillar for supporting a door for getting on and off so that the door can be opened and closed, and a mount member provided on the left side of the driver's seat in the revolving frame is arranged near the door pillar. It is in the configuration.

With this configuration, the portion of the cab reinforced by the door pillars can be mounted on the revolving frame using the mount member, and the cab can be mounted on the revolving frame with greater rigidity.

According to a sixth aspect of the present invention, the mount member is provided at a right rear portion, a right front portion, and a left side portion of the revolving frame with respect to a driver's seat.

With this configuration, the cab can be mounted on the revolving frame using at least three mount members, and the number of mount members can be minimized.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a swing type construction machine according to the present invention will be described below in detail with reference to FIGS. First, FIGS. 1 to 4 show a first embodiment according to the present invention.

In the drawing, reference numeral 1 denotes a small rear swing type hydraulic shovel having a body weight of, for example, about 2 to 4 tons. The hydraulic shovel 1 is a lower traveling body provided with crawler tracks 2A, 2A on both left and right sides. 2 and an upper revolving unit 3 rotatably mounted on the lower traveling unit 2, and on the front side of the lower traveling unit 2, a soil removal device 4 for performing leveling work, earth removal work, and the like. Is provided,
On the front side of the upper revolving unit 3, a working device 5 for excavating earth and sand is provided.

The working device 5 includes a swing post 5A attached to the front end of a later-described turning frame 6 so as to swing leftward and rightward, and a boom attached to the swing post 5A so as to be able to move up and down. 5B, an arm 5C provided at the tip of the boom 5B so as to be able to move up and down,
It is roughly constituted by a bucket 5D rotatably attached to the tip of C.

Next, the upper swing body 3 includes a swing frame 6, a counterweight 14, an engine 15, and a driver's seat 1 to be described later.
The rear side of the upper revolving unit 3, which is generally constituted by a floor plate 20, a cab 26, and the like, and provided with the counterweight 14, has a width of 1 to the vehicle width of the lower traveling unit 2 when the upper revolving unit 3 turns. It is formed in a substantially circular shape centered on the turning center so as to fit within a double virtual circle.

Reference numeral 6 denotes a revolving frame which forms a support structure for the upper revolving unit 3, and the revolving frame 6 is, as shown in FIG.
A bottom plate 7 formed in a substantially circular shape by a thick steel plate or the like;
Left and right vertical plates 8, 9 erected upward in the center of the bottom plate 7 and extending forward and rearward, and are provided so as to cover the front side of each of the vertical plates 8, 9 from above. 7 and a substantially triangular upper plate 10 facing the main body. And
The front end of the bottom plate 7 and the front end of the upper plate 10 form a bracket 11 to which the swing post 5A of the working device 5 is attached so as to swing left and right.

Reference numeral 12 denotes a cutout recess provided on the left front side of the revolving frame 6. The cutout recess 12 is formed by, for example, a portion indicated by a two-dot chain line in the bottom plate 7 (a left front corner of a skirt cover 18 described later). Is formed by notching a portion formed between the base plate 7 and the bottom plate 7, and the notched portion is a notch portion A.

Reference numeral 13 denotes a support member fixed to the rear side of the turning frame 6 and supporting a rear side of a cab 26 described later. The support member 13 constitutes a part of the turning frame 6. Here, the support member 13
A substantially U-shaped support frame portion 13A which is erected on the rear side of the bottom plate 7 and extends leftward and rightward across the left and right vertical plates 8 and 9;
An upper end is supported by the support frame 13A, and a lower end is supported on the revolving frame 6 via a bracket or the like (not shown), and includes a cover 13B that covers the engine 15 and the like described later. The cover portion 13B is provided with a horizontal surface portion 13C extending horizontally forward from the support frame portion 13A.
And a pedestal portion 13D provided on the left side of the horizontal surface portion 13C and provided with a driver seat 19 described later.

Reference numeral 14 denotes a counterweight attached to the rear end of the turning frame 6, and the counterweight 14 is
This balances the weight with the working device 5. The counterweight 14 is formed in an arc shape centered on the center of rotation of the upper swing body 3 in order to realize a small backward swing of the upper swing body 3.

Reference numeral 15 denotes an engine mounted on the rear side of the turning frame 6.
The support member 13 is disposed in a laterally extending state extending leftward and rightward on the front side of the cover 4 and is covered from above by a cover portion 13B of the support member 13.

Reference numeral 16 denotes an engine cover provided on the revolving frame 6 at the rear side of the support member 13. The engine cover 16 covers the engine 15 from behind. Reference numeral 17 denotes a tank cover provided on the revolving frame 6 at a position on the right side of the support member 13. The tank cover 17 includes a fuel tank, a hydraulic oil tank, and the like disposed on the right side of the revolving frame 6. (Not shown). Reference numeral 18 denotes a skirt cover that covers the periphery of the turning frame 6. The skirt cover 18 covers a gap between the bottom plate 7 and the floor plate 20 of the turning frame 6.

A driver's seat 19 is provided on the revolving frame 6 in front of the engine 15.
Pedestal portion 1 of cover portion 13B constituting support member 13
It is arranged on 3D, and the operator is seated.

Reference numeral 20 denotes the notch A of the revolving frame 6.
The floor plate 20 includes a bracket (not shown) or the like on the turning frame 6 in a state where a gap is formed between the floor plate 20 and the bottom plate 7 of the turning frame 6. Mounted using. The floor panel 20 has a left front portion extending to the left front corner of the skirt cover 18 and covers the left front portion of the revolving frame 6 that has become the cutout portion A, and forms a foothold for the worker. .

Numeral 21 denotes a floor plate 2 located in front of the driver's seat 19.
The left and right traveling levers 22 and 22 for traveling the lower traveling body 2 and the left and right operation levers 23 for operating the working device 5 are provided on the lever stand 21. , 23, etc. are provided. On the right side of the driver's seat 19, a control box 25 in which a fuel lever 24 and the like are arranged is provided.

A cab 26 is provided at the left front of the upper revolving unit 3 and defines a cab. The cab 26 is mounted on the revolving frame 6 via mount members 40, 41, and 42, which will be described later. It covers the seat 19, the lever stand 21 and the like.

The cab 26 is a rectangular box having a front part 27, a rear part 28, a left side part 29, a right side part 30, and an upper part 31 by bending or welding a thin steel plate. Front part 27, rear part 2
8, windows 27A, 28A, 29A, 30A made of a transparent glass plate or the like are provided on the left side surface portion 29 and the right side surface portion 30, respectively. A recess 29 </ b> B into which the front side of the engine cover 16 is inserted is formed on the lower rear side of the left side surface section 29.
A recess 30 </ b> B into which the right front portion of the support member 13 enters is provided below the rear portion of the right side surface portion 30.

As shown in FIG. 4, a left front pillar 32 extending upward and downward is provided at the left front corner of the cab 26.
The right front pillar 33 extending upward and downward is fixed at the right front corner. A left rear pillar 34 extending upward and downward is fixed to a left rear corner of the cab 26, and a right rear pillar 35 extending upward and downward is fixed to a right rear corner. ing.

Reference numeral 36 denotes a left side surface portion 29 constituting the cab 26.
The door pillar 36 extends upward and downward, and supports a door 38 to be described later via a hinge member 37 so as to be openable and closable.

Reference numeral 38 denotes a door for getting on and off provided on a door pillar 36 fixed to the left side surface portion 29 of the cab 26 via a hinge member 37. The door 38 allows an operator to get on and off the cab 26. It is sometimes opened and closed, and has a window 38A made of a transparent glass plate or the like.

Reference numeral 39 denotes a lower frame provided on the lower end side of the cab 26. The lower frame 39 extends inward from the cab 26 from the lower end sides of the front surface portion 27, the rear surface portion 28, the left side surface portion 29, and the right side surface portion 30. It is formed in a rectangular frame shape by a narrow plate extending. The lower frame 39 is located on the left,
Along the front lower frame 39A extending to the right, the left,
It comprises a lower right frame 39B extending rightward, a lower left frame 39C extending frontward and rearward along the left side surface portion 29, and a lower right frame 39D extending forward and rearward along the right side surface portion 30.

A bolt insertion hole 39A1 through which a bolt 42A of a mount member 42 described later is inserted is formed on the right end side of the front lower frame 39A. Also, the lower lower frame 39
A bolt 40 of a mounting member 40 described later is provided on the left end side of B.
A bolt insertion hole 39B1 through which A is inserted is formed, and a bolt insertion hole 39B2 through which a bolt 41A of a mount member 41 described later is inserted is formed at the right end side of the rear lower frame 39B.

Reference numeral 40 denotes a horizontal surface portion 13C of the support member 13.
A left rear mounting member 41 provided between the cab 26 and the rear lower frame 39B. A right rear side 41 is also provided between the horizontal surface portion 13C of the support member 13 and the rear lower frame 39B of the cab 26. 3 shows the mounting member. Here, these mount members 40 and 41 are made of an elastic body such as rubber, for example, and are fixed on the horizontal surface portion 13C of the support member 13 so that the left rear portion of the turning frame 6 with respect to the driver's seat 19 is used. , Located on the right rear.

The mount members 40 and 41 are connected to the bolts 40A and 41A projecting from the upper surface thereof by the cab 26.
Bolt insertion holes 39B1, 39 formed in the rear lower frame 39B.
Bolt 40 that is inserted through B2 and protrudes from rear lower frame 39B
A and 41A are screwed with nuts or the like to make the cab 2
The rear left and right rear corners of 6 are attached to the turning frame 6.

Reference numeral 42 denotes a right front mount member provided between the turning frame 6 and the front lower frame 39A of the cab 26.
The mount member 42 is also made of an elastic material such as rubber like the mount members 40 and 41, and is fixed to the upper plate 10 of the revolving frame 6 using a bracket or the like (not shown). It is arranged in the right front part with reference to the seat 19.

The mounting member 42 is mounted on the front lower frame 39A of the cab 26 by attaching a bolt 42A projecting from the upper surface thereof.
Through the bolt insertion hole 39A1 drilled in the
By screwing a nut or the like to a bolt 42A protruding from the cab 26, the right front corner of the cab 26
It is to be attached to.

The present embodiment has the above-described configuration, and the cab 26 is provided with the bolt insertion holes 39 of the rear lower frame 39B.
Bolts 40 of mounting members 40, 41 on B1, 39B2
A, 41A, and the bolt insertion hole 39 of the front lower frame 39A.
The bolt 42A of the mount member 42 is inserted through A1, and a nut or the like is screwed onto each of the bolts 40A, 41A, 42A, thereby being mounted on the turning frame 6.

In this case, the mounting members 40, 41, 42
Are disposed at the left rear portion, the right rear portion, and the right front portion of the turning frame 6 with reference to the driver's seat 19, respectively, so that the cab 26 has a left rear corner and a right rear corner. Section, the right front corner, these three mounting members 40, 4
The turning frame 6 can be attached to a high-strength portion of the turning frame 6 excluding the cutout portion A by using the components 1 and 42.

Thus, according to the present embodiment, it is designed on the premise that an eave-shaped canopy (not shown) that covers the upper side of the driver's seat 19 is provided as a standard, and the left front side has a notch A for weight reduction. The cab 26 can be attached to the turning frame 6 instead of the canopy without changing the structure of the turning frame 6.

In this case, the three mounting members 40, 4
1, 42 are provided in the high-strength portion of the revolving frame 6 excluding the notch A, so that even if the left front corner of the cab 26 projects greatly from the revolving frame 6, the cab 26 By using the mount members 40, 41, and 42, the cab 26 can be attached to the revolving frame 6 with high rigidity, and the cab 26 can be stabilized. Therefore, for example, it is not necessary to provide a bracket or the like on the turning frame 6 to support the left front corner of the cab 26,
The structure of the turning frame 6 can be simplified and reduced in weight.

Next, FIGS. 5 and 6 show a second embodiment according to the present invention. The feature of this embodiment is that the mount member is formed of a revolving frame having a left rear portion with respect to a driver's seat, The configuration is provided in the right rear portion, the right front portion, and the front portion. In this embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, reference numeral 51 denotes a cab used in this embodiment instead of the cab 26 according to the first embodiment, and the cab 51 has a front surface substantially similar to the cab 26 according to the first embodiment. Part 27, rear part 28, left and right side parts 29,
Although it is formed in a box shape by the upper surface portion 31 and the like, the configuration of a lower frame 52 to be described later is different.

Reference numeral 52 denotes a lower frame provided on the lower end side of the cab 51 instead of the lower frame 39 according to the first embodiment, and the lower frame 52 extends leftward and rightward along the front surface 27. A lower frame 52A, a lower rear frame 52B extending left and right along the rear surface 28, a lower left frame 52C extending front and rear along the left surface 29, and a right front and rear extending along the right surface 30. It consists of a lower frame 52D.

A bolt insertion hole 52A1 through which the bolt 42A of the mounting member 42 is inserted is formed on the right end side of the front lower frame 52A, and a left and right central portion of the front lower frame 52A is described later. A bolt insertion hole 52A2 through which a bolt 53A of the mounting member 53 to be inserted is inserted is formed. Further, a bolt insertion hole 52B1 through which the bolt 40A of the mounting member 40 is inserted is formed on the left end side of the rear lower frame 52B, and a bolt 41A of the mounting member 41 is inserted through the right end side of the rear lower frame 52B. An insertion hole 52B2 is formed.

Reference numeral 53 denotes a mount member provided between the revolving frame 6 and the front lower frame 52A of the cab 51 together with the mount member 42.
0 and the like, and a bolt 53A protrudes from the upper surface thereof. And the mounting member 5
3 is a bracket or the like on the upper plate 10 of the revolving frame 6, for example.
(Not shown), and is disposed in the front portion of the turning frame 6 with respect to the driver's seat 19, that is, between the bracket 11 and the lever stand 21.

The mounting member 53 is connected to a bolt 53A projecting from the upper surface thereof by a front lower frame 52A of the cab 51.
Through the bolt insertion hole 52A2 formed in the front lower frame 52.
A front center of the cab 26 is attached to the revolving frame 6 by screwing a nut or the like to a bolt 53A protruding from A.

The present embodiment has the above-described structure, and the cab 51 is provided with the bolt insertion holes 52 of the rear lower frame 52B.
B1, 52B2, bolts 40 of mounting members 40, 41
A, 41A, and the bolt insertion hole 52 of the front lower frame 52A.
A1 inserts the bolt 42A of the mount member 42, and further inserts the bolt 53A of the mount member 53 through the bolt insertion hole 52A2 of the front lower frame 52A.
It is mounted on the turning frame 6 by screwing nuts or the like to the A, 41A, 42A, 53A.

As described above, in the present embodiment, the mounting members 40, 41, and 42 are provided at the left rear portion, the right rear portion, and the right front portion of the turning frame 6 with respect to the driver's seat 19, respectively. In addition to the above, a mounting member 53 is disposed at a front portion with respect to the driver's seat 19, and the four mounting members 40, 41, 42, and 53 are used to make a left rear corner of the cab 51 and a right corner. The rear corner, the right front corner, and the front center are attached to the turning frame 6.

Therefore, the cab 51 can be attached to the revolving frame 6 with greater rigidity as compared with the first embodiment described above by the addition of the mount member 53, and the cab 51 can be further stabilized. Can be.

Next, FIGS. 7 and 8 show a third embodiment of the present invention. The feature of this embodiment is that the mounting member is formed by changing the turning frame to the left rear part with respect to the driver's seat. The structure is provided on the right rear portion, the right front portion, and the left side portion. In this embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, reference numeral 61 denotes a cab used in the present embodiment instead of the cab 26 according to the first embodiment. The cab 61 comprises a front portion 27, a rear portion 28, and left and right side portions 2.
A lower frame 62, which will be described later, is provided at the lower end side of the box-shaped frame formed by the upper and lower parts 9, 30, and the upper surface part 31 and the like.

Reference numeral 62 denotes a lower frame provided on the lower end side of the cab 61 instead of the lower frame 39 according to the first embodiment. The lower frame 62 extends leftward and rightward along the front surface 27. A lower frame 62A, a lower rear frame 62B extending left and right along the rear surface 28, a lower left frame 62C extending front and rear along the left side 29, and a right extending front and rear along the right surface 30. It consists of a lower frame 62D.

A bolt insertion hole 62A1 through which the bolt 42A of the mount member 42 is inserted is formed on the right end side of the front lower frame 62A. Further, a bolt insertion hole 62B1 through which the bolt 40A of the mounting member 40 is inserted is formed on the left end side of the rear lower frame 62B, and a bolt 41A of the mounting member 41 is inserted through the right end side of the rear lower frame 62B. An insertion hole 62B2 is formed. Furthermore, lower left frame 6
A bolt insertion hole 62C1 is formed near the door pillar 36 at the center of the front and rear directions of 2C, through which a bolt 63A of a mount member 63 described later is inserted.

Reference numeral 63 denotes a mount member provided between the revolving frame 6 and the lower left frame 62C of the cab 61. The mount member 63 is made of an elastic body similar to the mount member 40 and the like. Bolts 63A are protruded. The mount member 63 is fixed to, for example, a left end of the bottom plate 7 of the turning frame 6 using a bracket or the like (not shown), and is a left portion of the turning frame 6 with respect to the driver's seat 19, and It is disposed at a position near the door pillar 36 provided on the cab 61.

The mounting member 63 is connected to the lower left frame 62C of the cab 61 by bolts 63A protruding from the upper surface thereof.
Through the bolt insertion hole 62C1 formed in the lower left frame 62.
A portion of the cab 61 near the door pillar 36 is attached to the turning frame 6 by screwing a nut or the like to a bolt 63A protruding from C.

In this embodiment, the cab 61 has a bolt insertion hole 62 of a rear lower frame 62B.
Bolts 40 of mounting members 40, 41 on B1, 62B2
A, 41A, and the bolt insertion hole 62 of the front lower frame 62A.
The bolt 42A of the mounting member 42 is inserted through A1 and the bolt 63A of the mounting member 63 is inserted through the bolt insertion hole 62C1 of the lower left frame 62C.
It is mounted on the turning frame 6 by screwing nuts or the like to the A, 41A, 42A, 63A.

As described above, in the present embodiment, the mounting members 40, 41, and 42 are provided at the left rear portion, the right rear portion, and the right front portion of the turning frame 6 with respect to the driver's seat 19, respectively. In addition to the above, a mounting member 63 is disposed on the left side with respect to the driver's seat 19, and the four mounting members 40, 41, 42, 63 are used to make a left rear corner of the cab 61, The rear right corner, the front right corner, and the left side are attached to the turning frame 6.

For this reason, the cab 61 can be attached to the revolving frame 6 with greater rigidity as compared with the first embodiment described above by the addition of the mount member 63, and the cab 61 can be stably supported. can do.

Further, the mounting member 63 is
The cab 61 can be attached to the revolving frame 6 with greater rigidity because the cab 61 is provided at a portion of the left side surface portion 29 reinforced by the door pillar 36.

Next, FIGS. 9 and 10 show a fourth embodiment according to the present invention.
This embodiment is characterized in that a mount member is provided in a right rear portion, a right front portion, and a left side portion of a revolving frame based on a driver's seat. In this embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, reference numeral 71 denotes a cab used in the present embodiment instead of the cab 26 according to the first embodiment. The cab 71 includes a front portion 27, a rear portion 28, and left and right side portions 2.
The lower frame 72 is formed at the lower end side of the box-shaped frame, and is formed by the upper and lower parts 9, 30 and the upper surface part 31 and the like.

Reference numeral 72 denotes a lower frame provided on the lower end side of the cab 71. The lower frame 72 is a front lower frame 72A extending left and right along the front surface 27, and left and right along the rear surface 28. The rear lower frame 72B extends frontward and rearward along the left side surface portion 29, the lower left frame 72C extends frontward and rearward along the left side surface portion 29, and the lower right frame 72D extends forward and rearward along the right side surface portion 30.

Further, a bolt insertion hole 72A1 through which the bolt 42A of the mount member 42 is inserted is formed on the right end side of the front lower frame 72A. Further, a bolt insertion hole 72B1 through which the bolt 41A of the mount member 41 is inserted is formed on the right end side of the rear lower frame 72B. Further, a bolt 73A of a mount member 73, which will be described later, is located near the door pillar 36 at the center in the front and rear directions of the lower left frame 72C.
Is inserted into a bolt insertion hole 72C1.

Reference numeral 73 denotes a mount member provided between the revolving frame 6 and the lower left frame 72C of the cab 71. The mount member 73 is formed of the same elastic body as the mount member 41 and the like, and has an upper surface side. A bolt 73A is protruded. The mount member 73 is fixed, for example, to a left end of the bottom plate 7 of the turning frame 6 using a bracket or the like (not shown), and is a left portion of the turning frame 6 with respect to the driver's seat 19, and It is disposed at a position near the door pillar 36 provided on the cab 71.

In this embodiment, the cab 71 is provided with the bolt insertion holes 72 of the rear lower frame 72B.
The bolt 41A of the mount member 41 is inserted through B1, the bolt 42A of the mount member 42 is inserted through the bolt insertion hole 72A1 of the front lower frame 72A, and the bolt 73A of the mount member 73 is inserted through the bolt insertion hole 72C1 of the lower left frame 72C. It is mounted on the revolving frame 6 by inserting and screwing a nut or the like to each of the bolts 41A, 42A, 73A.

As described above, in the present embodiment, the mounting members 41, 42, 73 are respectively disposed on the right rear portion, the right front portion, and the left side of the revolving frame 6 with respect to the driver's seat 19. These three mount members 41, 42, 73
By using, the cab 71 can be attached to a portion of the revolving frame 6 having a high strength excluding the notch A, and the cab 71 can be stabilized. In addition, since the cab 71 can be mounted on the turning frame 6 using the three mounting members 41, 42, 73, the number of mounting members can be minimized.

In the second embodiment described above, the left rear portion of the turning frame 6 with respect to the driver's seat 19,
Mount members 40, 4 at right rear, right front, front
1, 42, 53, and these four mounting members 4
The rear left corner, the right rear corner, the right front corner, and the front center of the cab 51 are attached to the turning frame 6 by using 0, 41, 42, and 53. However, the present invention is not limited to this. For example, as shown in a modified example shown in FIG. 11, the revolving frame 6 is mounted on the front portion, the rear portion, the left side portion, and the right side portion with respect to the driver's seat 19. The members 81, 82, 83, and 84 may be provided respectively.

In the third embodiment described above, the mounting member 63 is arranged on the left side of the driver's seat 19 in the revolving frame 6 and in the vicinity of the door pillar 36 provided on the cab 61. However, the present invention is not limited to this. For example, as in another modified example shown in FIG. 12, the mount member 85 is separated from the door pillar 36 on the left side of the driver's seat 19 in the turning frame 6. It is good also as a structure arrange | positioned at the specified position.

In each of the above-described embodiments, the cab 26 (51, 6) is mounted using three or four mounting members.
(1, 71) is attached to the revolving frame 6 as an example, but the present invention is not limited to this, and a configuration using, for example, five or more mount members may be used.

Further, in each of the above-described embodiments, the cab 26 (51, 61, 71) is
8. Although described as having a rectangular box shape surrounded by the left and right side portions 29, 30 and the upper surface portion 31, the present invention is not limited to this. For example, a polygonal shape such as a pentagonal shape, a circular shape, etc. It can also be applied to cabs having various shapes such as an oval shape.

[0081]

As described above in detail, according to the first aspect of the present invention, since the cab is mounted on the turning frame having the cutout on the left front side, the cab is mounted on at least three places of the turning frame excluding the cutout. Since the members are provided, the cab can be attached to the high-strength portion of the revolving frame excluding the cutout portion by using at least three mount members. For this reason, it is designed on the assumption that an eave-shaped canopy that covers the upper side of the driver's seat is standard equipment, and even for a turning frame with a cutout on the left front side,
The cab can be mounted with sufficient rigidity instead of the canopy without changing the structure of the revolving frame.

Further, according to the second aspect of the present invention, since the mounting members are provided at four locations of the revolving frame excluding the notched portions, the mounting members are provided at high strength portions of the revolving frame excluding the notched portions. The cab can be mounted using four mounting members, and the cab can be mounted on the revolving frame with great rigidity.

According to the third aspect of the present invention, the mounting member is provided at the left rear portion, the right rear portion, the right front portion, and the front portion of the turning frame with respect to the driver's seat. Of the frame, the left rear part of the driver's seat, the right rear part,
The cab can be attached to the turning frame with great rigidity by the mount member provided at the front portion of the driver's seat in addition to the mount member provided at the right front portion, and the cab can be stabilized.

According to the fourth aspect of the present invention, the mount members are provided on the left rear portion, the right rear portion, the right front portion, and the left side portion of the turning frame with respect to the driver's seat. The cab can be attached to the turning frame with great rigidity by the mounting members provided on the left side, right rear, and right front of the driver's seat of the turning frame, and by the mounting members provided on the left side of the driver's seat. it can.

According to the fifth aspect of the invention, the cab is provided with a door pillar for supporting the door for getting on and off so as to be openable and closable. Since the cab is arranged in the vicinity, a portion of the cab reinforced by the door pillar can be attached to the turning frame by using the mount member. Thus, the cab can be attached to the turning frame with greater rigidity, and the cab can be stabilized.

Further, according to the invention of claim 6, since the mount members are provided at the right rear portion, the right front portion, and the left side portion of the revolving frame with respect to the driver's seat, at least three mount members are provided. The cab can be mounted on the revolving frame using the mounting members, and the number of mounting members can be minimized.

[Brief description of the drawings]

FIG. 1 is a front view showing a hydraulic excavator applied to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a state where a cab is removed from a hydraulic shovel.

FIG. 3 is a plan view showing a turning frame and a support member.

FIG. 4 is a cross-sectional view of the positional relationship between the cab and the mount member as viewed from the direction of arrows IV-IV in FIG.

FIG. 5 is an exploded perspective view similar to FIG. 2, showing a hydraulic shovel according to a second embodiment with a cab removed.

FIG. 6 is a sectional view similar to FIG. 4, showing a positional relationship between a cab and a mount member according to a second embodiment.

FIG. 7 is an exploded perspective view similar to FIG. 2, showing a hydraulic shovel according to a third embodiment with a cab removed.

FIG. 8 is a sectional view similar to FIG. 4, showing a positional relationship between a cab and a mount member according to a third embodiment.

FIG. 9 is an exploded perspective view similar to FIG. 2, showing a hydraulic shovel according to a fourth embodiment with a cab removed.

FIG. 10 is a sectional view similar to FIG. 4, showing a positional relationship between a cab and a mount member according to a fourth embodiment.

FIG. 11 is a sectional view similar to FIG. 4, showing a positional relationship between a cab and a mount member according to a modification of the present invention.

FIG. 12 is a sectional view similar to FIG. 4, showing a positional relationship between a cab and a mount member according to another modification of the present invention.

[Explanation of symbols]

2 Lower traveling body 6 Revolving frame A Notch 12 Notch recess 13 Support member 15 Engine 19 Driver seat 20 Floor plate 26, 51, 61, 71 Cab 27 Front part 28 Rear part 29 Left side part 30 Right side part 36 Door pillar 38 Door 39, 52 , 62, 72 Lower frame 40, 41, 42, 53, 63, 73, 81, 82, 8
3,84,85 Mounting member

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiaki Shimomura 1-2, Sasagaoka, Mizuguchi-machi, Koka-gun, Shiga Prefecture Inside Hitachi Construction Machinery Tierra Shiga Plant (72) Inventor Kimio Iino, Sasa Mizuguchi-machi, Koka-gun, Shiga 1-2-2 Kagaoka 1-2 Hitachi Construction Machinery Tierra Shiga Factory (72) Inventor Takeshi Yamaguchi 1-2 Sasagaoka Minamiguchi-machi, Koka-gun Shiga Prefecture F-term (reference) 2D015 EA02

Claims (6)

[Claims] 1. A lower traveling body and an upper revolving body rotatably provided on the lower traveling body, wherein the upper revolving body comprises a support structure having a notch formed by cutting a left front side. A turning frame, an engine provided on the rear side of the turning frame, a driver seat located on the front of the engine and provided on the turning frame, and a driver seat including the cutout portion of the turning frame. And a slab covering the periphery of the driver's seat in the upper revolving unit, and the revolving frame is provided at at least three places excluding the notch. A swiveling construction machine, comprising a mounting member for mounting a cab. 2. The revolving construction machine according to claim 1, wherein the mount member is provided at four positions of the revolving frame except for the notch. 3. The swivel according to claim 1, wherein the mount member is provided at a left rear portion, a right rear portion, a right front portion, and a front portion of the swivel frame with respect to the driver's seat. Construction machinery. 4. The vehicle according to claim 1, wherein the mount member is provided in a left rear portion, a right rear portion, a right front portion, and a left side portion of the turning frame with respect to the driver's seat. Swiveling construction machine. 5. A structure in which the cab is provided with a door pillar for supporting a door for getting on and off so as to be openable and closable, and a mount member provided on the left side of the driver's seat in the turning frame is arranged near the door pillar. Claim 4 which becomes
The swivel-type construction machine according to 1. 6. The revolving construction machine according to claim 1, wherein the mount member is provided at a right rear portion, a right front portion, and a left side portion of the revolving frame with respect to the driver's seat.