JP2000104288A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic shovel shortening the time for fitting a counterweight to an upper revolving structure and prevented from spoiling the beautiful appearance of the rear part. SOLUTION: A hiding projecting edge 91 for coveringly hiding the top and left/right of the rear end of an upper revolving structure 2 is provided in the upper revolving structure 2 side of a counter weight 9 mounted on the rear part of the upper revolving structure 2 of a hydraulic shovel. This constitution hides the deviation in the top/bottom and left/right and prostrating degree on the front/rear without adjusting the prostration of the counter weight 9 in the top/bottom and left/right directions. The time for fitting works can be thus shortened, the integrated sense between the upper revolving structure 2 and the counter weight 9 is prevented from being spoiled, and no adverse effects are affected on the beautiful appearance of the rear part of the hydraulic shovel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a structure for mounting a revolving superstructure and a counterweight of a construction machine such as a hydraulic shovel.

[0002]

2. Description of the Related Art Construction machines, for example, hydraulic shovels and the like having an undulating and bendable working arm and various working attachments at the end of the working arm, perform construction during excavation work and hanging load work. In order to maintain the balance of the machine vehicle, a counterweight is mounted on the rear part of an upper revolving structure that is rotatably mounted on the upper part of the lower traveling structure.

[0003]

When attaching the counterweight to the rear part of the upper revolving structure of the counterweight, the counterweight is hung by a crane, a chain block, a balancer, or the like, while the counterweight is viewed from the rear. In view of the above, each dimension of the upper revolving structure such as a gap in a width direction, a vertical direction, a front-rear direction, and the like must be controlled and mounted, so that a large amount of labor and time is required for mounting the counterweight.

In order to solve the above problem, the width and height of the counterweight 52 are initially set to be larger than the width and height of the upper swing body 51 as shown in FIG. As shown in FIG. 5, a step 53 is provided between the counterweight 52 and the upper frame 51 a or the guard 51 b (conventional example 1), and as shown in FIG. Conventional example 2 in which a convex portion 62a is provided on the upper revolving structure side, and this convex portion 62a is inserted inside the rear portion of the upper revolving structure 61)
Such measures are taken.

However, in the means of the prior art 1 shown in FIG. 4, the work of adjusting the inclination of the counterweight to the left and right and the work of adjusting the front and rear inclination (by shim adjustment) are left, and the means of the prior art 2 shown in FIG. In this case, it is necessary to insert the convex part of the counterweight into the inside of the rear part of the upper revolving structure. Therefore, the workability of the counterweight installation work is only slightly improved, and the effect of reducing the working time is small. Therefore, there is a problem to be solved such that the sense of unity between the upper revolving structure and the counterweight is impaired, and the rear appearance of the construction machine cannot be improved.

Accordingly, it is an object of the present invention to reduce the work time required for mounting the upper revolving unit on the upper revolving unit and to reduce the counterweight so as not to impair the sense of unity between the upper revolving unit and the counterweight. An object of the present invention is to provide a construction machine that can be attached to an upper-part rotating body.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and accordingly, means employed by a construction machine according to claim 1 of the present invention is provided with an engine and hydraulic equipment. In a construction machine having an upper revolving structure including an upper frame and a guard for covering these engines and hydraulic devices, and a counterweight mounted to a rear end of the upper revolving structure, an end of the counterweight and It is characterized in that the rear end of the upper revolving structure overlaps.

In this case, since the end of the counterweight and the rear end of the upper swing body overlap, even if the counterweight is slightly tilted up and down or left and right, the end of the counterweight and the rear end of the upper swing body are formed. There is no gap between the counterweight and the position adjustment work is not required when installing the counterweight, which can greatly contribute to shortening the counterweight operation time and also enhance the appearance of the rear appearance of the construction machine easily. Can be done.

The means employed by the construction machine according to claim 2 of the present invention is the construction machine according to claim 1, wherein the rear end of the upper revolving structure and the end of the counterweight are provided inside. An inclined surface is formed on at least a part of the located side.

In this case, since the outer shape of the rear end of the upper revolving structure having the inclined surface or the end of the counterweight becomes slightly smaller, the outer shape of the counterweight or the upper revolving structure which covers this is changed to the upper revolving structure or the counterweight. Can be mounted with the same outer shape as that of the upper revolving structure, which leads to improvement of the entire upper revolving structure.

According to a third aspect of the present invention, there is provided a construction machine according to any one of the first to second aspects, wherein the rear end of the upper swing body and the counter are provided. A concealing projection edge is formed on at least a part of an outer side of the end of the weight.

In this case, the rear end of the upper revolving structure or the end of the counterweight can be easily covered with the concealing projection edge, and the external appearance of the rear of the construction machine can be easily improved.

According to a fourth aspect of the present invention, there is provided a construction machine according to any one of the first, second, and third aspects, wherein the means is provided at a rear end of the upper frame. The counterweight is mounted on the weight supporting member.

In this case, since the weight supporting member of the upper frame indicates the counter weight, the front and rear, left and right positioning can be easily performed in the mounting work, and the working time required for the mounting is greatly reduced. be able to.

According to a fourth aspect of the present invention, there is provided a construction machine according to the fourth aspect, wherein a support seat surface is formed below the counterweight so as to be able to be fitted with the weight support member. It is characterized by having done.

In this case, in combination with the weight supporting member of the upper frame, the positioning operation can be easily performed in the front-rear direction and the left-right direction, so that the operation time required for the mounting operation can be further greatly reduced. .

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a counterweight and a construction machine of a construction machine according to an embodiment of the present invention will be described with reference to FIG. FIG. 2 (a) of a perspective view, FIG. 2 (b) of a partial side cross-sectional view of the rear upper side, FIG. 2 (c) of a partial plan cross-sectional view of the rear left side, and partial plan cross-sectional view of the rear right side 2 (d), and FIG. 3 which is an explanatory diagram of the support state of the counterweight by the weight support member.

First, the structure of a hydraulic shovel will be described with reference to FIG. 1. Reference numeral 1 denotes a crawler traveling type lower traveling body, and an upper revolving body 2 which turns around a vertical axis is placed on the lower traveling body. Is installed. A driver's cab 3 is mounted on the upper swing body 2, and a working arm 4 is supported by a boom foot pin (not shown) next to the driver's cab 3.
A counterweight 9 is mounted at the rear.

The working arm 4 has a boom 41 that is raised and lowered by the expansion and contraction of a rod of a boom cylinder 5 whose bottom side is pivotally attached to the upper swing body 2, and a tip end of the boom 41 is bendable around a horizontal axis as a fulcrum. The arm 42 is supported and is bent by the expansion and contraction of a rod of the arm cylinder 6 whose bottom is pivotally attached to a cylinder pivot bracket 41a protruding from the back of the boom 41. The tip of the arm 42 is operated by the expansion and contraction of a rod of the bucket cylinder 7 whose bottom is pivotally attached to a cylinder pivot bracket 42a protruding from the back of the arm 42 to excavate, for example, earth and sand. A bucket 8 is mounted.

The revolving superstructure 2 and the counterweight 9 are configured as shown in FIGS. 2A, 2B, 2C and 2D and FIG. First, the upper revolving unit 2 includes an upper frame 21 on which an engine, hydraulic equipment, and the like (not shown) are mounted, and a guard 22 mounted on the upper frame 21 to cover and hide the engine, hydraulic equipment, and the like. ing. Side inclined surfaces 21a are formed on the right and left sides of the rear end edge of the upper frame 21, and the rear end side of the upper frame 21 is configured to be thin. The upper surface of the rear end of the guard 22 has an upper inclined surface 2.
2a is formed with side inclined surfaces 22b, 22b on the left and right side surfaces, and the guard 22 has a lower portion as the upper portion becomes closer to the rear end side and a narrower left and right width as it goes toward the rear end side. It is configured as follows.

The counterweight 9 covers the upper inclined surface 22a and the left and right side inclined surfaces 21a and 22b.
Inside, upper inclined surface 22a and left and right side inclined surfaces 21a, 2
A shielding projection edge 91 having an inner inclined surface 91a that can be parallel to 2b is formed. Further, a support seat surface 92 is formed at a lower portion of the counter weight 9 on the rear end side of the upper revolving structure 2, that is, at a position below the center of gravity of the counter weight 9. Note that the inclined surface and the concealing projection edge are not limited thereto, and may be provided on each of the lower portion of the upper frame 21 and the corresponding lower inner portion of the counterweight 9. The left and right side inclined surfaces 21a of the upper frame 21 and the upper inclined surface 22a of the guard 22 are also provided.
Each of the left and right side inclined surfaces 22b and the inner inclined surface 91a of the counterweight 9 may be formed in an R shape. Furthermore, the inclined surface at the rear end of the upper swing body 2 is not always necessary.

At the center of the rear end of the upper frame 21 in the width direction at the rear end of the upper revolving unit 2 and at a lower position, a block-shaped weight support member 23 for supporting the counterweight 9 via a support surface 92 is provided. It is configured to be attached. The weight supporting member 23 provided at the rear end of the upper frame 21 in this manner is the
It is aimed at shortening the installation work time. That is, unlike the case where the mounting work is performed while the counterweight 9 is hung by a crane, a chain block, a balancer, or the like, the weight supporting member 2 is supported via the supporting seat surface 92.
3 allows the counterweight 9 to be supported and the counterweight 9 to be attached to the upper revolving unit 2 while preventing the counterweight 9 from swinging back and forth and left and right.

The case where the counterweight 9 is mounted on the rear part of the upper swing body 2 in the hydraulic excavator according to the first embodiment of the present invention will be described below.
Is suspended by a crane, a chain block, a balancer, or the like, and lowered to bring the support seat surface 92 into contact with the weight support member 23. Next, the counterweight 9 is pressed and moved in the direction of the upper revolving unit 2 while preventing the back and forth and left and right swinging, so that the upper inclined surface portion of the upper revolving unit 2 and the left and right side inclined surface portions are separated by the counterweight 9. Then, the counterweight 9 is attached to the rear portion of the upper swing body 2 by inserting a bolt into a weight attachment hole (not shown) and screwing it.

When the counterweight 9 is attached to the rear end of the upper revolving unit 2, the rear end portion of the upper revolving unit 2 is covered by the concealing projection edge 91 of the counterweight 9 as described above. . Therefore, there is no noticeable difference in the level difference due to the vertical displacement and the left-right inclination of the counterweight 9, so that the work of adjusting the counterweight 9 in the vertical direction and the work of adjusting the inclination in the left-right direction are unnecessary. Further, even if the counterweight 9 has fallen in the front-rear direction, the gap between the counterweight 9 and the rear end of the upper revolving unit 2 cannot be seen from the outside, and the degree of the fall in the front-rear direction is determined. Therefore, it is not necessary to adjust the counterweight 9 in the front-rear direction.

When attaching the counterweight 9 to the upper revolving unit 2, as described above, the work of adjusting the counterweight 9 in the vertical direction, the work of adjusting the inclination in the horizontal direction, and the work of adjusting the inclination in the front-rear direction are not required. Compared with 1 or 2, the workability of the counterweight mounting work is greatly improved, which can greatly contribute to shortening of the counterweight mounting work time.

On the other hand, regarding the rear appearance of the excavator, as described above, the concealing projection edge 9 of the counterweight 9 is provided.
1, the rear end portion of the upper revolving structure 2 is covered and hidden, so that there is no noticeable difference in the level difference caused by the vertical displacement and the left and right inclination of the counterweight 9, and the counterweight 9 is tilted in the front-rear direction. Even if it is difficult to see the gap between the counterweight 9 and the rear end of the upper revolving structure 2 from the outside, it is difficult to determine the degree of fall in the front-rear direction. In spite of this, the sense of unity between the upper swing body 2 and the counterweight 9 is not impaired, and the appearance of the rear portion of the hydraulic shovel is not adversely affected.

In the above, the technique of covering the rear end of the upper revolving structure with the end of the counterweight has been described.
Conversely, the end of the counterweight may be covered by the rear end of the upper swing body. In this case, an inclined surface may be formed at the end of the counterweight, and a concealing projection edge may be formed at the rear end of the upper swing body. Also, the case where the technical idea of the present invention is applied to a hydraulic excavator has been described as an example,
Since the technical concept of the present invention can be applied to an upper revolving structure of a self-propelled crane such as a wheel crane, the invention is not particularly limited to a hydraulic excavator.

[0028]

According to the construction machine of the first aspect of the present invention, since the end of the counterweight and the rear end of the upper swing body overlap, even if the counterweight is slightly inclined vertically or horizontally. Since there is no gap between the end of the counterweight and the rear end of the upper revolving structure, there is no need to adjust the position when installing the counterweight, which can greatly contribute to shortening the counterweight operation time. At the same time, the appearance of the rear appearance of the construction machine can be easily improved.

According to the construction machine of the second aspect of the present invention, the outer shape of the rear end portion of the upper revolving structure having the inclined surface or the end portion of the counterweight is slightly reduced. The revolving superstructure can be mounted so that the external shape of the revolving superstructure or the counterweight is equal to that of the upper revolving superstructure, which leads to improvement of the entire upper revolving superstructure.

According to the construction machine of the third aspect of the present invention, the rear end of the upper revolving structure or the end of the counterweight can be easily covered by the concealing projection edge.
The beauty of the rear appearance of the construction machine can be easily improved.

According to the construction machine of the fourth aspect of the present invention, since the weight supporting member of the upper frame indicates the counter weight, the front, rear, left and right positioning can be easily performed in the mounting work. Work time required for mounting can be greatly reduced.

According to the construction machine according to the fifth aspect of the present invention, in combination with the weight supporting member of the upper frame, the mounting work can be easily performed in the front-rear, left-right positioning, and thus the work required for mounting. The time can be further greatly reduced.

[Brief description of the drawings]

FIG. 1 is an overall side view of a hydraulic shovel according to an embodiment of the present invention.

2 (a) is a rear perspective view of a hydraulic shovel, FIG. 2 (b) is a partial side cross-sectional view of the rear upper part of the hydraulic shovel, and FIG. ) Is a partial plan sectional view of the rear left side of the excavator, and FIG.
(D) is a partial plan sectional view of the rear right side of the hydraulic shovel.

FIG. 3 is an explanatory view of a support state of a counterweight by a weight support member according to the embodiment of the present invention.

FIG. 4 is a perspective view illustrating a counterweight mounting state according to Conventional Example 1.

FIG. 5 is a perspective view illustrating a counterweight mounting state according to Conventional Example 2.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lower traveling body, 2 ... Upper revolving structure, 21 ... Upper frame, 21a ... Side inclined surface, 22 ... Guard, 22a ... Upper inclined surface, 22b ... Side inclined surface, 23 ... Weight support member, 3 ... Operation Room, 4 ... working arm, 41 ... boom, 41a ...
Cylinder pivot bracket, 42 ... Arm, 42a ... Cylinder pivot bracket, 5 ... Boom cylinder, 6 ... Arm cylinder, 7 ... Bucket cylinder, 8 ... Bucket, 9 ...
Counterweight, 91: concealing projection edge, 91a: internal inclined surface, 92: support seat surface.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shintaro Sakiya 3-12-4 Gion, Asaminami-ku, Hiroshima-shi, Hiroshima F-term in Aburaya Heavy Industries, Ltd. (reference) 2D015 FA01 FA03 3F205 AA20 GA01 GA03 KA10

Claims (5)

[Claims] An upper revolving structure comprising an upper frame on which an engine and hydraulic equipment are mounted, a guard for covering the engine and the hydraulic equipment, and a counterweight mounted on a rear end of the upper revolving structure. The end of the said counterweight and the rear end of the said upper revolving superstructure overlap, The construction machine characterized by the above-mentioned. 2. The device according to claim 1, wherein an inclined surface is formed on at least a part of a rear end portion of the upper revolving structure and an end portion of the counterweight that is located on an inner side. Construction machinery. 3. A concealing projection edge is formed on at least a part of an outer side of a rear end of the upper revolving structure and an end of the counterweight. The construction machine according to any one of the above items. 4. The construction according to claim 1, wherein a counterweight is mounted on a weight support member provided at a rear end of the upper frame. machine. 5. The construction machine according to claim 4, wherein a support seat surface that can be fitted to the weight support member is formed below the counterweight.