JPH11269927A - Revolving working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive the same controllability and the same parts for different kinds of machines in common. SOLUTION: A revolving working machine has a revolving base rotatably provided on a travel device 2 about a vertical revolution axis P1 and a working device 4 horizontally swingably provided at the front end of the revolving base about a vertical swing axis P2. In this case, the distance from the revolution axis P1 to the swing axis P2 of the working device 4 is set to be almost the same for a plurality of different kinds of machines A, B which differ in the distance from the rear end of the revolving base to the revolution axis P1, and the same travel device 2 and the same working device 4 are used for the different kinds of machines A, B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning machine such as a backhoe.

[0002]

2. Description of the Related Art As a turning work machine such as a backhoe, a turning table is provided on a crawler traveling device so as to be rotatable about a vertical turning axis. Japanese Patent Publication No. Hei 4-2805, which is equipped with a backhoe device consisting of a boom, arm, bucket, etc., which can swing from side to side.
No. 3 (prior art example 1).

[0003] In the turning work machine described in this publication, the turning axis is eccentrically disposed on the front side with respect to substantially the center of the turning table, and the rear end of the turning table projects rearward with respect to the turning axis. The rear end of the turntable protrudes from the rear end of the traveling device and is turned so that the rear end of the turntable protrudes from the left and right widths of the travel device. In this turning work machine, since the rear portion of the turning table projects rearward from the traveling device, it is possible to appropriately maintain a front-to-back weight balance with the front backhoe device, and to obtain a large excavating force by the backhoe device. However, on the other hand, since the turntable protrudes from the traveling device by turning, it is not suitable for sewerage work or pipe burial work in narrow streets such as an urban area.

[0004] Under such circumstances, the turning shaft center is disposed substantially at the center of the turntable, and the turning radius drawn by the rear end of the turntable is accommodated within the front, rear, left and right widths of the traveling device, and is used for narrow roads. A turning machine (conventional example 2) that enables excavation work has been proposed (for example, Japanese Patent Application Laid-Open Nos. 6-212667 and 7-12).
No. 7100).

[0005]

The turning machine (hereinafter referred to as a small rear turning type) according to Conventional Example 2 enables excavation work at a narrow work site, but the rear end of the swivel becomes short. In addition, the weight is more likely to be biased toward the front backhoe apparatus side than the turning work machine of the first conventional example (hereinafter, referred to as a standard type), which is disadvantageous in obtaining a large excavating force. Further, since the rear end of the swivel is shortened, there is a problem that the arrangement of the engine devices on the swivel is limited.

Therefore, at present, both the standard type and the small backward turning type coexist. However, conventionally, since the structure of the swivel base, the traveling device, the backhoe device, and the like are completely different between the small rear swing type and the standard type, they are manufactured using different manufacturing processes and different parts. In addition, the movement of the backhoe device side when turning was different for each model, so when the operator switched between the two models, the operability was different and the operation feeling for each model was different. Had to be fed.

[0007] Therefore, the present invention aims to reduce the burden on the operator by sharing the operability between different models, and to reduce the manufacturing cost by sharing the parts. The purpose is to provide.

[0008]

The present invention employs the following technical means to achieve the above object. That is,
The present invention relates to a swivel provided on a traveling device so as to be rotatable around a vertical swing axis, and a work provided at the front end of the swivel so as to be able to swing left and right around a vertical swing axis. In the turning working machine having the device, the distance from the turning axis to the swinging axis of the working device is substantially the same between a plurality of models having different distances between the turning axis and the rear end of the turning table. Is set.

The present invention also provides a swivel provided on a traveling device so as to be rotatable about a vertical swivel axis, and a front end of the swivel which swings left and right about a vertical swing axis. In a turning work machine having a freely provided working device, a model in which the turning locus drawn by the rear end of the swivel table is accommodated within the left and right widths of the traveling device, and the turning locus drawn by the rear end of the swivel table is the running device The distance from the axis of rotation to the axis of swing of the work implement is set to be substantially the same between models that project from the left and right widths.

[0010] According to this, a so-called rear small device in which the turning trajectory drawn by the rear end of the swivel table is set within the front, rear, left and right widths of the traveling device, between models having different distances from the rear end of the swivel table to the pivot axis. The turning radius of the pivot axis of the working device is substantially the same between the turning type turning device and the standard turning device in which the turning locus at the rear end of the turning table projects from the front, rear, left and right widths of the traveling device. When, for example, the working device is swung while the swivel table is turned on the traveling device, the operation of the working device becomes substantially the same,
The operation feeling in each model can be made substantially similar.

[0011] By configuring the traveling device and the working device with a common one for each type of turning work machine having such a configuration, the parts can be shared and the working device for the traveling device can be used. The arrangement, the turning operation, and the swinging operation can be substantially the same in each model, so that the working range and the operability can be reliably shared. Also,
In the present invention, the outer peripheral wall portion of the turntable of each model has a straight wall portion in the front-rear direction or the left-right direction, and the straight wall portion adjusts the difference in the front-rear width or the left-right width of the turntable between the models. According to this, according to this, by providing a straight wall portion on the outer peripheral wall of different models, by adjusting the difference in width between the models in the straight wall portion, In addition, the curved shape of the corner portion of the outer peripheral wall can be shared, whereby the outer peripheral wall member can be partially shared, and the press die and the like of the curved portion can be shared, thereby reducing the manufacturing cost.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 3 and 4 show two types of backhoes (turning machines) A,
B, each of the turning work machines A and B is rotatably turned around a vertical axis (turning axis) P1 on a traveling device 2 having a pair of left and right crawler traveling bodies 1 and 1. A vertical axis (oscillation axis) at the front end of the swivel 3
Backhoe device (working device) that can swing left and right around P2
4 is provided.

The turning work machine A shown in FIG. 3 has a turning axis P1 substantially at the center of the traveling device 2 and the turning axis P1.
Is arranged on the front side of the swivel 3 (3A), the rear end of the swivel 3A protrudes rearward from the rear end of the traveling device 2 and the turning locus drawn by the rear end of the swivel 3A is the left and right width of the traveling device 2. (Hereinafter, referred to as a standard type machine).

On the other hand, the turning work machine B shown in FIG. 4 has a turning axis P1 substantially at the center of the traveling device 2 and the turning axis P1 is arranged at substantially the center of the turntable 3 (3B). The platform 3B is arranged in front of the rear end of the traveling device 2 and the turning trajectory drawn by the rear end of the swivel 3B is accommodated within the front, rear, left and right widths of the traveling device 2 (hereinafter referred to as a small rear turning type machine). ).

FIGS. 1 and 2 show the models A and B side by side, and show the comparison from the side and the plane. Each traveling device 2 has the same width dimension.
The bearings 5 are provided at the front, rear, left and right centers of the table, and the turntables 3A and 3B are rotatably supported by the bearings 5.

A dozer device 40 is provided at the front of the traveling device 2 so as to protrude forward. In each of the models A and B, a base frame 6 is provided below the swiveling bases 3A and 3B, and a counter weight 7 is provided at a rear end of the base frame 6 to balance front and rear weight with the backhoe 4 at the front.
Is provided. On the front side of the base frame 6, a side wall member 8 constituting an outer peripheral wall on the front side of the swivel base 3 is attached and fixed. The side wall member 8 and the counterweight 7 allow the swivel bases 3A and 3B to be fixed. An outer peripheral wall is formed.

At the front end of the base frame 6, there is provided a support bracket 10 provided with a left-right swing support shaft 9 of the backhoe device 4. In a plan view of the swivel bases 3A and 3B, a control floor 11 is formed at a left front portion thereof, and a control floor 11 is provided behind and to the right of the control floor 11.
The hood 12 is arranged so as to surround the hood 12, and equipment such as an engine 13 and a tank is arranged in the hood 12.

An operation section 16 having an operation lever, an operation pedal and the like is formed at the front of the control floor 11, and steps 17A and 17B for the driver are provided at the rear of the control floor 11.
Is formed. A driver's seat 18 is disposed on the hood 12 behind the step 17, and a sun shade 19 is provided above the driver's seat 18. An operation box 2 provided with operation levers on both left and right sides of the driver's seat 18.
0 is provided.

The hood 12 is composed of swiveling tables 3A, 3B
, A left fixed hood 22 disposed behind the control floor 11 and on the left side of the swivel, and an open / close hood 23 provided at the rear of the left and right fixed hoods so as to be freely opened and closed. It is composed of The driver's seat 18 is mounted on the left fixed hoods 21A and 21B.

The standard type machine A and the small rear turning type machine B are set so that the left and right widths of the turntables 3A and 3B are substantially the same, and the front and rear width of the standard type machine A is the front and rear width of the small small turning type machine B. It is formed larger than. A common hood 12 is used between the two models A and B. In the small backward turning machine B, the weight 7 and the bonnet 12 are used.
Is formed in an arc shape centered on the pivot axis P1, and the turning locus drawn by the weight 12 and the rear end of the bonnet 12 is the maximum turning locus of the swivel 3B. The trajectory is set within the left, right, front and rear widths of the traveling device 2.

On the other hand, in the turntable 3A of the standard type machine A, the front-rear width is formed to be longer than that of the turntable 3B of the small rear turn type machine B, and the turning axis P1 is biased forward with respect to the turntable 3A. Since it is centered, the maximum turning trajectory drawn by the rear end of the turntable 3A projects from the left, right, front and rear widths of the traveling device 2A. However, in the standard type machine A of the present embodiment, the horizontal width of the swivel base 3A is substantially the same as that of the small rear swing type machine B, and the rear end shape of the swivel base 3A is the same radius as the small rear swing type machine B. , So that the same hood as the small rear turning type machine B can be used.

Since the same hood 12 is used between the standard type machine A and the small rear turning type machine B, the standard type machine A provided with the swivel 3A having a large front-rear width has:
A wide space is formed on the right side of the step 17 in front of the bonnet 12, and this space can be used as an auxiliary entrance. In each of the models A and B, a concave portion 24 that is recessed downward is formed on the fixed hood 22 on the left side, and is disposed so that the rear portion of the driver's seat 18 fits into the concave portion 24.

In the small backward turning type machine B, the standard type
Since the front-rear width is smaller than that of the standard type A, the position of the driver's seat 18 with respect to the left fixed bonnet 22 is arranged behind the standard type A in order to secure a space for the control floor 11. By forming the concave portion 24 slightly wider on the rear side corresponding to the molding machine B, the driver's seat 18 can be arranged in the concave portion 24 in both models, thereby sharing the hood 12. It is possible.

The same type of driver's seat 18 is used between the two models A and B, and the front side of the driver's seat 18 is supported by a stand or the like provided on a control floor. At the rear of the driver's seat 18 and on the left fixed hood 22, a mount 25 for mounting a support of the sunshade 19 is provided.
The arrangement of the mount 25 on the left fixed bonnet 22 is the same for each model.
The same components are used for the awning support 26 attached to the wing.

On the other hand, the position of the driver's seat 18 with respect to the left fixed bonnet 22 is different from that of the standard type machine A in that the rear small turn type machine B is located rearward. It is necessary to arrange it on the rear side. Therefore, two attachment portions 27 are formed on the back of the sunshade portions 19 and 19, one for the standard machine type A and the other for the small backward turning type B, and the support 26 is attached to one of the front and rear attachment portions 27 by a bolt or the like. Thus, the same shade 19 can be shared for both models.

Turning tables 3A, 3 in each of the models A, B
The right and left side portions of the side wall member 8 of B are formed with straight wall portions 28 extending linearly in the front-rear direction.
A straight wall portion 29 extending linearly in the left-right direction is formed. More specifically, the side wall member 8 includes left and right individual members 8L, 8L, with the swing axis P2 of the backhoe device 4 interposed therebetween.
8R, the length of the front straight wall portions 29L, 29R on the front side of the left and right side wall members 8L, 8R in each model A, B, and the straight wall portions 29L, 29R and the straight wall portions 2 on the left and right sides.
The corner portions 30L and 30R between the 8L and 28R have the same curved shape, and the left and right straight wall portions 28L and 28R have different lengths to adjust the difference between the front and rear widths of the turntables 3A and 3B. It is doing.

That is, although the lengths of the right and left straight wall portions 28L and 28R are different between the models, the curved shapes of the corner portions 30L and 30R are similar, and the same press die is used as the side wall member 8. It is possible to use and mold, and parts can be shared. For example, when the corner members 30L and 30R and the straight wall portions 28L and 28R are individually formed in the side wall members 8L and 8R, the corner portions 30L and 3R are formed.
The straight wall portions 28L and 28R having different lengths may be used in common with the 0R member, and may be connected to the corner portions 30L and 30R by spot welding, bolts, or the like, and the corner portions 30L and 30R and the straight wall portions may be used. 28L, 28R and 1
In the case of using a member, the side wall member 8L for the standard type machine A,
When the 8R is formed and used for the small rear turning type machine B, the members can be shared by cutting the straight wall portions 28L and 28R into appropriate dimensions.

The left and right widths of the standard type machine A and the small rear turning type machine B shown in the figure are the same, but as shown in FIG. The dimensions can be adjusted not only by the right and left straight wall portions 28L and 28R of the swivel 3 but also by the front straight wall portions 29L and 29R, and the curved shapes of the corner portions 30L and 30R can be made the same.

Hereinafter, the working device 4 in each of the models A and B will be described. The backhoe device 4 provided for each of the models A and B shares the same configuration, and the backhoe device 4 includes a swing bracket attached to a support shaft 9 of a support bracket 10 provided at a front end of the base frame 6. 31
The swing bracket 31 is pivotally connected to the swing bracket 31. The base end of a boom 32 is pivotally connected to the swing bracket 31 so that the base end of the boom 32 can swing up and down. A bucket 34 is pivotally connected to the tip of the arm 33 so as to be free to squeeze and dump.

The swing bracket 31, boom 32, arm 33, and bucket 34 are driven to swing by swing cylinders 35, boom cylinders 36, arm cylinders 37, and bucket cylinders 38, each of which is a hydraulic cylinder. I have. The swing axis P2 of the backhoe device 4 in each of the models A and B is disposed at a position slightly eccentric to the right from the swing axis P1, and the swing axis P1 of each of the models A and B is shifted from the swing axis P1. The front-rear distance L1 and the left-right distance L2 up to the center P2 are set to be substantially the same, whereby the linear distance L between the pivot axis P1 and the swing axis P2 is set to be equal to that of the standard type machine A and the small rear swing type machine. B
Are substantially the same.

Therefore, in the standard type machine A in which the pivot axis P1 is eccentrically arranged on the front side of the turntable 3A,
By extending the support bracket 9 forward from the swivel base 3A more than the small rear swing type machine B, the distance L between the swing axis P1 and the swing axis P2 in each of the models A and B is substantially the same. is there. As described above, the backhoe device 4 is shared by the models A and B, and the distance between the pivot axis P2 and the pivot axis P1 of the backhoe device 4 is set to be substantially the same. Since the swing axis P2 and the turning locus of the backhoe device 4 due to the turning are substantially the same between the models A and B, and the swing locus of the backhoe device 4 in each of the models A and B is also substantially the same. The work range and operability of both models A and B can be made common.

For example, when performing a trench ditching work near a fence, the swivel bases 3A and 3B are swiveled with respect to the traveling device 2, and the backhoe device 4 is swung with respect to the swivel bases 3A and 3B to thereby perform fences and the like. , But at this time, the swivel 3A, 3B
The operation can be performed with the amount of rotation of the backhoe device 4 and the amount of swing of the backhoe device 4 substantially the same between the models A and B, and the excavation work can be performed with the same operation feeling even when the models are changed.

Further, since the traveling device 2 and the backhoe device 4 are shared by making the interval between the pivot axis P1 and the pivot axis P2 the same, when performing deep excavation work with the backhoe device 4, When swinging the boom 32 downward, the boom 32 can be operated at the same operation interval to avoid interference with the dozer device 40, and when an interference prevention structure between the boom 32 and the dozer device 40 is provided, This can be the same for each of the models A and B.

The design of the present invention is not limited to the above embodiment, but can be changed as appropriate.

[0035]

As described in detail above, according to the present invention, the operability of the working device can be shared between different models, so that when the operator switches between models, the work can be performed with almost the same operational feeling. This makes it possible to reduce the burden on the operator. In addition, the production cost is reduced by using common components.

[Brief description of the drawings]

FIG. 1 is a side view showing different types of turning work machines in comparison.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of a standard turning work machine.

FIG. 4 is a side view of a small backward turning type turning work machine.

FIG. 5 is an explanatory view showing a straight wall portion of a swivel base.

[Explanation of symbols]

 2 Traveling device 3 Swivel table 4 Backhoe device (working device) 8 Side wall member A Standard type machine B Small back swing type machine P1 Swing axis P2 Swing axis

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kenji Hida 64 Ishizu-Kitacho, Sakai-shi, Osaka Inside Kubota Sakai Works

Claims (4)

[Claims] A swivel provided on a traveling device so as to be rotatable around a vertical swivel axis, and a swivel provided at a front end of the swivel so as to be able to swing left and right around a vertical swing axis. In a turning work machine having a working device, a distance between the turning axis and the swinging axis of the working device is substantially reduced among a plurality of models having different distances between the turning axis and the rear end of the turning table. A turning machine characterized by the same settings. 2. A swivel provided on a traveling device so as to be rotatable around a vertical swivel axis, and a swivel provided at a front end of the swivel so as to be able to swing left and right about a vertical swivel axis. In a turning work machine having a working device, the turning locus drawn by the rear end of the swivel table is contained within the left and right width of the traveling device, and the turning locus drawn by the rear end of the turning table is determined by the right and left width of the running device. A turning working machine wherein the distance from the turning axis to the swinging axis of the working machine is set to be substantially the same as that of the projecting model. 3. The turning work machine according to claim 1, wherein a traveling device and a working device are shared between the respective models. 4. An outer peripheral wall portion of each type of swivel base is provided with a front-rear direction or right-left direction straight wall portion, and the straight wall portion is used to determine the difference in the front-rear width or left-right width of the swivel base between the models. The turning work machine according to any one of claims 1 to 3, wherein the turning work machine is an adjusting unit for adjusting.