JP2004068290A - Swing type hydraulic shovel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low cost swing type hydraulic shovel capable of securing rise and fall stability at a walkthrough time regardless of the number of kinds of machines. <P>SOLUTION: In a swing type hydraulic shovel in which a working machine (15) is fitted to an upper revolving body (10) to be freely swingable right or left through a swing bracket, swinging the working machine (15) by an actuator (16) equipped between a swing bracket and the upper revolving body (10), arms (21a, 22a, 23a, 24a, 25a and 26a) for attaching the swing actuator (16) of the swing brackets (21, 22, 23, 24, 25 and 26) are made to form a stair of steps (20). Step members (25b) for a stair may be fitted to the arm (25a). It is preferable that nonslip means (21c, 22c, 23c, 24c, 25c and 26c) are installed on the arm (21a) or the step members (25b). <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a swing type excavator, and more particularly to a swing type excavator having a step for lifting and lowering.
[0002]
[Prior art]
As is well known, a swing type excavator allows a work machine to be offset with respect to a center line in a forward direction of a vehicle by a horizontal swing movement of the work machine in combination with a swing of an upper revolving structure. Ditch excavation along the route is possible. On the other hand, when the swing type excavator works along the side wall of the building, there are cases where the left side of the vehicle body (normally, the driver's seat side) is close to the building and it is desired to move up and down from the right side of the vehicle body (normally, the equipment room). During daily inspections, there is also a demand to approach the driver's seat from the right side of the vehicle body after checking from the right side of the vehicle body to the equipment room on the right side of the vehicle body where inspection points are concentrated. As means for solving these problems, there is a method in which a step for raising and lowering is arranged on the front right side of the vehicle body so as to be able to move up and down, so that the driver's seat can be boarded from both right and left sides of the vehicle (hereinafter referred to as walkthrough).
[0003]
An example of a conventional swing type excavator will be described with reference to FIGS. FIG. 11 is a side view of a conventional swing type excavator, and FIG. 12 is a top view of a main part of the excavator, which is a S view of FIG.
11 to 12, the swing type excavator 2 is provided with an upper revolving unit 60 so as to be freely rotatable above the lower traveling unit 5, and a work machine 15 is horizontally mounted on a front part of the upper revolving unit 60 via a swing bracket 70. It is attached to swing freely in the left and right directions. A swing cylinder 16 is attached between the arm portion 70 a projecting to the lower side of the swing bracket 70 and the lower swing frame of the upper swing body 60, and the work machine 15 swings due to expansion and contraction of the swing cylinder 16. It is supposed to.
[0004]
Further, an engine room 11 is provided at a rear portion of the upper revolving structure 60, a driver's seat 12 is provided at a front left side, and a device room 13 having an inspection lid 13a is further provided at a front right portion. A floor 31 is provided below the driver's seat 12, and handrails 32, 33, and 34 are provided around the floor 31. Further, a step 61 is attached to the front revolving frame of the upper revolving unit 60 on the right side of the front. The position and shape of this step 61 are set so as not to interfere with the swing bracket 70.
[0005]
According to the configuration shown in FIGS. 11 to 12, when riding on the swing type hydraulic excavator 2, usually, the operator gets on the left crawler belt upper surface 5 a of the lower traveling body 5 and then grasps the handrail 32 or the handrail 33 by hand. Then, the driver can go up by putting his / her foot on the left end 31a of the floor in front of the driver's seat 12. Further, if necessary, it is possible to grab the handrails 33 and 34 from the right crawler belt upper surface 5b of the lower traveling body 5 and go up to the floor right end 31b via the step 61, thereby enabling walk-through. I have.
[0006]
[Problems to be solved by the invention]
However, in the swing type excavator 2 according to the above-described conventional technique, a step 61 is attached to the front right side of the upper revolving unit 60 as a means for realizing a walk-through configuration. Problem.
(1) The cost is increased by attaching the step 61.
(2) Since it is necessary to avoid interference with the swing bracket 70 in the step 61, the size of the step 61 may not be sufficiently secured depending on a small-sized model, so that further elevation stability from the step is secured. It is desired to do.
[0007]
The present invention has been made in view of the above-described problems, and has as its object to provide a swing-type hydraulic excavator that is low-cost and that can secure the vertical stability during walk-through regardless of the size of the model. I have.
[0008]
Means for Solving the Problems, Functions and Effects
In order to achieve the above object, a first aspect of the present invention provides a work machine which is swingably mounted on an upper revolving structure via a swing bracket so as to freely swing left and right, and is operated by a swing actuator mounted between the swing bracket and the upper revolving structure. In a swing type excavator that swings the machine, an arm portion for attaching a swing actuator of the swing bracket is a step for lifting and lowering.
[0009]
According to the first invention, the following actions and effects can be obtained.
(1) The arm portion of the swing bracket is located at an intermediate position between a vertical step (see FIG. 11) and a horizontal interval (see FIG. 12) between the upper surface of the right traveling device and the right end of the driver's seat floor. Therefore, it is easy to transfer from the upper surface of the right-side traveling device to the right end of the driver's seat floor via the arm portion, so that the user can ride easily and stably.
(2) Since there is no need to provide a dedicated step, the cost is reduced accordingly.
(3) Since the size of the step portion can be set without considering the interference with the swing bracket as in the related art, it can be applied regardless of the size of the model.
[0010]
A second invention provides a swing type hydraulic shovel in which a work machine is swingably mounted on an upper swing body via a swing bracket so as to swing left and right, and the work machine is swung by a swing actuator mounted between the swing bracket and the upper swing body. The swing bracket has a structure in which a step member for elevating and lowering is attached to an arm portion for attaching a swing actuator.
[0011]
According to the second invention, the same effect as the first invention can be obtained, and the step member is attached as an add-on, so that the shape, size and height of the step can be arbitrarily set regardless of the size of the model. It becomes.
[0012]
In a third aspect based on the first or second aspect, the arm portion or the step member is provided with a slip prevention means.
[0013]
According to the third aspect, in addition to the effects of the first aspect or the second aspect, since slip is reliably prevented, a convenient step having excellent workability and getting on / off stability can be realized.
[0014]
As a result, a swing-type hydraulic excavator that enables walk-through with low cost and applicable means regardless of the size of the model can be configured.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment according to the present invention will be described below in detail with reference to FIGS.
[0016]
First, a first embodiment will be described with reference to FIGS. FIG. 1 is a side view of a swing type excavator according to the present invention, and FIG. 2 is a top view of a main part of the excavator, which is a P view of FIG. In the following description, the same components as those in the above-mentioned drawings are denoted by the same reference numerals, and description thereof will be omitted.
[0017]
First, a swing type excavator 1 according to the present invention will be described with reference to FIGS. At the front of the upper revolving structure 10 of the swing type excavator 1, the work machine 15 can be freely swung in the left-right direction via swing brackets 21, 22, 23, 24, 25, and 26, which will be described in detail in the following embodiments. Attached to. The swing bracket 16 is extended and contracted by the expansion and contraction of the swing cylinder 16 composed of a hydraulic cylinder attached between the arm portions 21a, 22a, 23a, 24a, 25a, 26a provided on the swing bracket and the swing frame of the upper swing body 10. The work machine 15 swings in the left-right direction. Although a hydraulic cylinder is used as a swing actuator for swinging the work machine 15, the present invention is not limited to this.
[0018]
As means for getting on and off the driver's seat 12 from the right side of the vehicle body, each arm 21a, 22a, 23a, 24a, 25a, 26a of the swing bracket is set as a step 20 for ascending and descending from the right crawler belt upper surface 5b. 31b.
[0019]
The first embodiment will be described with reference to FIG. FIG. 3 is an EE cross-sectional top view of FIG. In FIG. 3, a slip prevention uneven portion 21 c is formed by casting on the upper surface of the arm portion 21 a of the swing bracket 21, and the arm portion 21 a is used as a step 20 for lifting and lowering.
[0020]
According to the first embodiment, the following operations and effects can be obtained.
(1) The arm portion 21a of the swing bracket 21 has substantially a vertical step (see FIG. 1) and a horizontal interval (see FIG. 2) between the right crawler belt upper surface 5b and the driver's seat floor right end 31b. It is in the middle position. Therefore, by setting the arm portion 21a to the step 20 for elevating and lowering, it is possible to easily transfer between the right crawler belt upper surface 5b and the driver seat floor right end portion 31b via the step 20, so that it is easy and stable. You can get on and off.
[0021]
(2) Since it is not necessary to provide a dedicated step for lifting and lowering in the upper revolving unit 10, the configuration can be made at a correspondingly low cost.
(3) Since the anti-slip irregularities 21c are formed by casting on the upper surface of the arm 21a, the anti-slip means can be easily installed at low cost.
(4) Since it is easy to set the shape of the arm portion of the swing bracket so as to be suitable for the step, it can be implemented at low cost.
(5) Since the size of the step portion can be set without considering the interference with the swing bracket as in the related art, the present invention can be applied regardless of the size of the model.
[0022]
Next, a second embodiment will be described with reference to FIG. FIG. 4 is an explanatory view of the steps of the swing hydraulic excavator according to the second embodiment, and is a cross-sectional top view taken along the line EE of FIG.
[0023]
In FIG. 4, an anti-slip sheet 22c is adhered to the upper surface of the arm portion 22a of the swing bracket 22, and the arm portion 22a is used as a step 20 for elevating.
According to the second embodiment, since the anti-slip sheet 22c is merely attached, the installation of the slip prevention means is easier than in the first embodiment.
[0024]
Next, a third embodiment will be described with reference to FIGS. FIG. 5 is an explanatory view of the steps of the swing hydraulic excavator according to the third embodiment, which is a cross-sectional top view taken along the line EE of FIG. 1 and FIG. 6 is a view as viewed in Q of FIG.
[0025]
5 to 6, an overhang portion 23b is provided on the upper surface of the arm portion 23a of the swing bracket 23, and an anti-slip portion formed by casting is provided on the upper surface of the arm portion 23a including the overhang portion 23b. An uneven portion 23c is provided, and the arm portion 23a is used as a step 20 for elevating.
[0026]
According to the third embodiment, the step 20 for elevating and lowering having a predetermined size can be installed even in a model in which the arm portion 23a of the swing bracket 23 is small. Therefore, getting on and off can be performed more easily and stably.
[0027]
Next, a fourth embodiment will be described with reference to FIG. FIG. 7 is an explanatory view of the steps of the swing hydraulic excavator according to the fourth embodiment, and is a cross-sectional top view taken along the line EE of FIG.
[0028]
In FIG. 7, an overhang portion 24b is provided on the upper surface of the arm portion 24a of the swing bracket 24, and an anti-slip sheet 24c is attached to the upper surface of the arm portion 24a including the overhang portion 24b. The part 24a is a step 20 for elevating.
According to the fourth embodiment, the installation of the slip prevention means is even easier than in the third embodiment. Other effects are the same as those of the third embodiment, and a description thereof will not be repeated.
[0029]
Next, a fifth embodiment will be described with reference to FIG. FIG. 8 is an explanatory view of the steps of the swing hydraulic excavator according to the fifth embodiment, and is a cross-sectional top view taken along the line EE of FIG.
[0030]
8, a steel plate 25b is attached as a step member to the upper surface of the arm portion 25a of the swing bracket 25 with bolts 25d, and an anti-slip sheet 25c is attached to the upper surface of the steel plate 25b to move the arm portion 25a up and down. 20.
[0031]
According to the fifth embodiment, even in a model in which the arm 25a of the swing bracket 25 is small, the step 20 for elevating and lowering having a predetermined size can be easily provided. Further, it is possible to implement the present invention by retrofitting (add-on) a conventional swing type excavator. Other effects are similar to those of the first embodiment.
Instead of the steel plate 25b and the anti-slip sheet 25c, another anti-slip steel plate such as a striped steel plate may be used.
[0032]
Next, a sixth embodiment will be described with reference to FIGS. FIG. 9 is an explanatory view of the steps of the swing hydraulic excavator according to the sixth embodiment, which is a cross-sectional top view taken along the line EE of FIG. 1 and FIG.
[0033]
9 and 10, an anti-slip steel plate 26b is attached as a step member to the upper surface of the arm portion 26a of the swing bracket 26 by using a plurality of bolts 26d and spacers 26e, and the arm portion 26a is used for lifting. Step 20 is performed.
[0034]
According to the sixth embodiment, in addition to the actions and effects of the fifth embodiment, first, the length L of the spacer 26e is selected to arbitrarily set the height position of the anti-slip steel plate 26b, that is, the height position of the step 20. It can be set.
In addition, the spacer 26e can prevent earth and sand from accumulating in the protruding hole 26c of the anti-slip steel plate 26b, so that the slip prevention effect can be further ensured.
[0035]
In addition, instead of the anti-slip steel plate 26b, another anti-slip steel plate such as a striped steel plate, or the steel plate 25b and the anti-slip sheet 25c in the fifth embodiment (FIG. 8) may be used. Further, the above-mentioned step member may be directly attached to the upper surface of the arm portion 26a without using the spacer 26e. In this case, a small amount of sediment accumulates in the projecting hole of the step portion, but there is no problem in the elevating property.
[0036]
As a result, a swing-type hydraulic excavator that enables walk-through with low cost and applicable means regardless of the size of the model can be configured.
[0037]
In the above description, the swing type excavator in which the driver's seat is disposed on the front left side of the upper revolving structure has been described as an example, but the same applies to a swing type excavator in which the left and right sides are reversed. Needless to say, the same operation and effect can be obtained. In addition, although the lower traveling body has been described as an example having the crawler-type traveling device, the invention is not limited to this, and the lower traveling body may have a wheel-type traveling device.
[Brief description of the drawings]
FIG. 1 is a side view of a swing type excavator according to the present invention.
FIG. 2 is a P view of FIG. 1;
FIG. 3 is an explanatory diagram of steps of the swing hydraulic excavator according to the first embodiment.
FIG. 4 is an explanatory diagram of steps of a swing hydraulic excavator according to a second embodiment.
FIG. 5 is an explanatory diagram of steps of a swing hydraulic excavator according to a third embodiment.
FIG. 6 is a Q view of FIG. 5;
FIG. 7 is an explanatory diagram of steps of a swing hydraulic excavator according to a fourth embodiment.
FIG. 8 is an explanatory diagram of steps of a swing hydraulic excavator according to a fifth embodiment.
FIG. 9 is an explanatory diagram of steps of a swing hydraulic excavator according to a sixth embodiment.
FIG. 10 is an R view of FIG. 9;
FIG. 11 is a side view of a swing type excavator according to the related art.
FIG. 12 is an S view of FIG. 11;
[Explanation of symbols]
Reference numeral 15: working machine, 16: swing cylinder (swing actuator), 20: step, 21a: arm, 21c: uneven portion for preventing slip (slip preventing means), 22a: arm, 22c: anti-slip sheet (slip preventing means) ), 23a: arm portion, 23b: overhang portion, 23c: uneven portion for preventing slip (slip prevention device), 24a: arm portion, 24b: overhang portion, 24c: anti-slip sheet (slip prevention device), 25a: arm portion 25b: steel plate, 25c: anti-slip sheet (slip prevention means), 26a: arm portion, 26b: anti-slip steel plate, 26c: projection hole (slip prevention means), 26e: spacer.

Claims (3)

A work machine (15) is attached to the upper swing body (10) via a swing bracket so as to freely swing left and right. 15) In a swing hydraulic excavator that swings
A swing hydraulic excavator, wherein an arm (21a) for attaching a swing actuator (16) of the swing bracket (21) is a step (20) for elevating and lowering. A work machine (15) is attached to the upper swing body (10) via a swing bracket so as to freely swing left and right. 15) In a swing hydraulic excavator that swings
A swing type excavator, wherein a step member (25b) for elevating and lowering is attached to an arm (25a) for attaching a swing actuator (16) of the swing bracket (25). The swing type excavator according to claim 1 or 2,
A swing type excavator, characterized in that slip prevention means (21c, 25c) are provided on the arm portion (21a) or the step member (25b).

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