JP2007186926A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction machine which facilitates the correction of height deviation between a counterweight and a building cover and the inclination of the counterweight without removing the counterweight, to thereby improve the quality of the appearance thereof. <P>SOLUTION: In the construction machine, a height and inclination adjusting means is arranged between a rear portion of a main frame 3 and the mounting surface 5a of the counterweight 5, and has a support means 101 having a tapered surface 101a, an adjusting means 102 mounted at a location spaced away from the support means 101, and a moving means 103 arranged between the adjusting means 102 and the support means 101, and having a tapered surface 103a vertically movable along the tapered surface 101a by adjusting a bolt of the adjusting means 102. Then the counterweight 5 arranged on the moving means 103 is set in a vertically movable manner. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a construction machine such as a hydraulic excavator or a crane provided with a working device and a counterweight on an upper swing body.

  As an example of the construction machine, a hydraulic excavator is given and described below.

  The hydraulic excavator is composed of a self-propelled lower traveling body and an upper revolving body provided on the lower traveling body so as to be capable of swiveling, and a work device for performing excavation work is provided on the front side of the upper revolving body. It has been.

  In particular, the upper-part turning body includes a main frame, a cab provided on the front left side on the main frame, a counterweight mounted on a rear side portion of the main frame, and a main body between the counterweight and the cab. It is generally composed of a building cover that covers equipment such as a prime mover and a pump provided on the frame.

In this type of conventional hydraulic excavator, the left and right sides of the counterweight are provided with protrusions that protrude toward the door cover that covers the side of the building cover, and this protrusion is provided between the door cover and the counterweight. It is configured as a cutting allowance for gap adjustment. (For example, see Patent Document 1)
Japanese Patent Application No. 11-229441

  However, in the above-described conventional technology, the clearance between the counterweight and the building cover can be adjusted by cutting the protruding portion after the counterweight is mounted on the main frame. Cannot be adjusted.

  Normally, the counterweight has a structure in which the central portion of the counterweight in the left-right direction is supported by the main frame, so the tolerance of the flatness of the counterweight mounting surface on the main frame side or the mounting surface on the counterweight side Due to the flatness tolerance, the counterweight may be mounted obliquely in the left-right direction.

  In this way, when the counterweight is mounted obliquely in the left-right direction, one side is attached with the counterweight lower than the building cover, and the other side is attached with the counterweight higher than the building cover. It becomes a state and affects the appearance.

  In addition, the counterweight may be attached to be tilted back and forth, which similarly affects the appearance.

  Furthermore, if it is attached as described above, the difference between the height of the building cover and the height of the counterweight and the inclination of the counterweight are not limited, and the cross section of the main frame becomes visible from the rear, which deteriorates the appearance quality.

  Since the counterweight is heavy, it is necessary to lift the counterweight using a crane or the like and remove it from the main frame. After removing the counterweight, a shim is placed between the mounting surface and the counterweight. This requires a large-scale work such as adjusting the mounting height and inclination.

  The present invention has been made in view of the above-described problems of the prior art, and its purpose is to easily correct the height deviation between the counterweight and the building cover and the inclination of the counterweight without removing the counterweight. It is possible to provide a construction machine that can improve the appearance quality.

  In order to achieve the above object, the invention according to claim 1 of the present application includes a base and an upper swing body that is pivotable with respect to the base, and the upper swing body has a skeleton of the upper swing body. The main frame arranged in the front-rear direction, the working device attached to the front part of the main frame, the counterweight attached to the rear part of the main frame, and the upper swing between the counterweight and the working device In a construction machine comprising a building cover that covers a power unit placed on the body, a height inclination adjusting means is provided between a rear side portion of the main frame and a lower portion of the counterweight, and the height inclination A feature is that the correlation position between the building cover and the counterweight can be adjusted by the adjusting means.

  In the invention according to claim 1 configured as described above, the height inclination adjusting means is provided between the rear portion of the main frame and the lower part of the counterweight, and the building cover and the counter are provided by the height inclination adjusting means. Since the correlation position with the weight can be adjusted, the height and inclination of the counterweight can be adjusted from the ground side without removing the counterweight and without requiring ascending and descending on the building cover.

  In the invention according to claim 2 of the present application, the height inclination adjusting means includes a supporting means fixed to a rear portion of the main frame and having a tapered surface, and a position spaced apart from the supporting means. The adjusting means is fixed to the rear portion, and the moving means is provided between the adjusting means and the supporting means. The moving means is adjusted to the tapered surface of the supporting means by the adjusting means. It is characterized by being provided so as to be movable along.

  According to the present invention, the height inclination adjusting means is provided between the rear portion of the main frame and the lower portion of the counterweight, and the height inclination adjusting means adjusts the correlation position between the building cover and the counterweight. Because it is possible to do so, it is not necessary to remove the counterweight from the main frame, and the deviation of the counterweight mounting height and the counterweight inclination can be easily adjusted, and the appearance can be aligned. The quality can be improved.

  Hereinafter, an embodiment of a construction machine of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a hydraulic excavator according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing a main frame and a counterweight. FIG. 3 is a perspective view showing the appearance of the height inclination adjusting means according to the first embodiment of the present invention, and FIG. is there.

  The first embodiment is provided in a construction machine, for example, a hydraulic excavator. As shown in FIG. 1, 1 is a lower traveling body as a base, and 2 is mounted on the lower traveling body 1 so as to be turnable. The upper swing body 2 is attached to the main frame 3 constituting the skeleton, the cab 4 provided on the left side of the front portion of the main frame 3, and the rear portion of the main frame 3. In addition, a work device 6 is provided which is roughly constituted by a counterweight 5 which will be described later. The work device 6 includes a boom 6A, an arm 6B, and a bucket 6C that are rotatably provided by actuators.

  Here, as shown in FIG. 2, the main frame 3 includes center frames 7 and 7 that are arranged substantially in parallel and extend in the front-rear direction, and side frames 8 that are provided outside the center frames 7 in the left-right direction. 8 and a plurality of overhanging beams 9, 9... Connecting the center frames 7 and the side frames 8, and the lower side of the main frame 3 is covered with an under cover (not shown). ing. The rear portions of the center frames 7 and 7 project rearward to form a pair of tail frames 10 and 10 that support the counterweight 5.

  A building cover 11 is provided on the main frame 3 and defines a machine room on the main frame 3. The building cover 11 extends in the front-rear direction along the side frames 8 and 8, and is erected upward. The door covers 12, 12, an upper cover 13 extending in the horizontal direction so as to cover the upper end side of each door cover 12 and having an opening (not shown) formed in the center, and an opening of the upper cover 13 are covered. As described above, the engine cover 14 and the engine cover 14 are attached to the upper cover 13 so as to be openable and closable.

  Inside the building cover 11 is an engine as a prime mover and a hydraulic pump that is driven by this engine and supplies hydraulic oil (pressure oil) to each actuator provided in the lower traveling body 1, work device 6 and the like (both shown in the figure). (Not shown) is mounted.

  Next, the main part of the invention will be described with reference to FIG.

  The height inclination adjusting means 100 is generally composed of a supporting means 101, an adjusting means 102 and a moving means 103 which will be described later.

  The support means 101 is formed of a corner member having a trapezoidal cross section.

  The support means 101 is attached on one tail frame 10 by welding or the like along the longitudinal direction, and is attached so that the tapered surface 101a faces upward.

  The adjusting means 102 includes a rectangular member 102a and a screw member 102b.

  The rectangular member 102a having a rectangular shape is provided on the same tail frame 10 to which the supporting means 101 is attached, and is attached by means such as welding with a predetermined distance so as to face the tapered surface 101a. Further, the rectangular member 102a has two screw holes 102c that are separated from each other, and these screw holes 102c are formed so as to penetrate in the left-right direction. The screw member 102b is screwed through the screw hole 102c provided in the rectangular member 102a.

  The moving means 103 is another member formed in the same shape as the supporting means 101, and the tapered surface 103a of this member is provided so as to come into contact with the tapered surface 101a. Furthermore, the moving means 103 is movably provided on the tail frame between the supporting means 101 and the adjusting means 102. The moving means 103 has two bolt insertion holes 103b penetrating vertically at a position avoiding the surface in pressure contact with the screw member 102b.

  On the other hand, two concave portions are formed in the lower portion of the counterweight 5 and mounting surfaces 5a and 5b are provided. In particular, the position of the mounting surface 5a in contact with the upper surface of the height inclination adjusting means 100 is the height dimension A from the lower surface of the counterweight 5 in consideration of the height of the height inclination adjusting means 100 and the adjustment height. Is set. The height dimension A is set to be larger than the height dimension B from the mounting surface 5 b on the side not joined to the height inclination adjusting means 100 to the lower surface of the counterweight 5.

  The construction machine according to the first embodiment has the above-described configuration and operates as follows.

  When adjusting the height of the counterweight 5 with respect to the building cover 11, the moving means 103 is attached to the tapered surface 101 a of the supporting means 101 by tightening or loosening the screw member 102 b as the adjusting means using a tool. Along with this, the counterweight 5 on the moving means 103 is moved up and down, and this is repeatedly adjusted so as to be at an appropriate position.

  When adjusting the inclination of the counterweight 5, the counterweight 5 can be inclined rearward by tightening the screw member 102b on the front side of the vehicle body, and the screw member 102b on the rear side of the vehicle body is tightened. Thus, the counterweight 5 can be tilted forward.

  When the adjustment is completed, the counterweight 5 and the tail frame 10 are fixed by inserting a mounting bolt (not shown) through the bolt insertion hole 103b and tightening it.

  As described above, according to the present embodiment, the correlation between the building cover 11 and the counterweight 5, specifically, the height and inclination of the counterweight can be adjusted according to the tightening degree of the screw member 102 b. Thus, a large-scale work using a conventional heavy machine becomes unnecessary, and the mounting height and inclination of the counterweight can be easily adjusted. Furthermore, since the appearance connection can be made uniform, the appearance quality can be improved.

  Moreover, since the height and inclination of the counterweight 5 can be adjusted without riding on the upper part of the building cover 11, the production efficiency can be improved.

  Further, the height deviation and inclination of the counterweight 5 can be adjusted with a simple configuration without causing a significant increase in the number of parts. It is possible to adjust the height deviation and the inclination without the necessity of preparing several adjustment members such as shims.

  In the above-described embodiment, the case where the height inclination adjusting means is attached to one side of the tail frame 10 has been described as an example. However, even when attached to both tail frames 10, the same effect as the above-described embodiment is obtained. . However, in this case, it is not necessary to make the left and right dimensions of the mounting surface 50 on the counterweight 5 side from the lower surface of the counterweight 5 different.

  In the above-described embodiment, the positions of the attachment surfaces 5a and 5b are set to be different from the lower surface of the counterweight 5, but the height of the tail frame 10 may be set to be different on the left and right.

  FIG. 5 is an enlarged cross-sectional view of the main part showing the height inclination adjusting means according to the second embodiment of the present invention. The right side of the drawing is the front side of the vehicle body, and the left side is the rear side of the vehicle body.

  Similar to the first embodiment, the second embodiment is characterized in that the height inclination adjusting means 200 is provided so as to push up the counterweight 500 by the action of a force from the tail frame 10 side. This will be described in detail below.

  In FIG. 5, reference numeral 300 denotes a height inclination adjusting means used in the present embodiment in place of the height inclination adjusting means 100 according to the first embodiment, and the height inclination adjusting means 300 is provided on the tail frame 10b side. It is. Here, the height inclination adjusting means 300 is roughly composed of an adjusting bolt 300a as an adjusting means and a flat plate 300b as a moving means.

  The tail frame 10b has bolt holes 32 and 32 for inserting the adjusting bolt 300a as the adjusting means in addition to the bolt holes 31 and 31 for inserting the mounting fixing bolt 30.

  The flat plate 300b has bolt holes 33 and 33 through which the fixing bolts 30 are inserted. The flat plate 300b is simply put on the tail frame 10b, and the tip of the adjustment bolt 300a pushes up the flat plate 300b and is separated from the tail frame 10b by tightening the adjustment bolt 300a.

  The setting of the height of the mounting surface 500a provided on the counterweight 500 is the same as in the first embodiment described above.

  The construction machine according to the second embodiment has the above-described configuration and operates as follows.

  As the adjustment bolt 300a is tightened, the height of the counterweight 500 provided with the height inclination adjusting means 300 in the left-right direction increases. When the adjustment bolt 300a on the front side of the vehicle body is tightened in the same manner as in the first embodiment described above, the counterweight 500 is inclined rearward, and conversely, when the adjustment bolt 300a on the rear side of the vehicle body is tightened, the counterweight 500 is Tilt forward.

  As described above, according to this embodiment, in addition to the effects of the first embodiment described above, the height and inclination of the counterweight 500 can be adjusted with a simpler configuration.

  It is needless to say that each of the above-described embodiments is not limited to a hydraulic excavator and can be widely applied to a construction machine having a crane and other counterweights.

  Furthermore, in the above-described embodiment, the height inclination adjusting means is configured to be pushed up from the tail frame on one side. However, the present invention is not limited to this, and is based on the push-up from both the left and right tail frames. It goes without saying that the same effect can be obtained even if the height inclination adjusting means is configured on each of the left and right sides.

1 is a perspective view showing a hydraulic excavator according to a first embodiment of the present invention. It is a perspective view which shows a main frame and a counterweight. It is a perspective view which shows the external appearance of the height inclination adjustment means by 1st Embodiment of this invention. FIG. 4 is an enlarged II-II cross-sectional view showing a main part of the height inclination adjusting means in FIG. 3. It is a principal part expanded sectional view which shows the height inclination adjustment means by 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving body 3 Main frame 4 Operator's cab 5,500 Counterweight 5a, 5b, 500a Mounting surface 6 Working device 6A Boom 6B Arm 6C Bucket 7 Center frame 8 Side frame 9 Overhang beam 10, 10b Tail frame 11 Building cover 12 Door cover 13 Upper cover 14 Engine cover 100, 300 Height inclination adjusting means 101 Support means 101a Tapered surface 102 Adjusting means 102a Rectangular member 102b Screw member 102c Screw hole 103 Moving means 103a Tapered surface 103b Bolt insertion Bolt 30 Fixing bolt 31 Bolt hole 32 Bolt hole 33 Bolt hole 300a Adjustment bolt 300b Flat plate

Claims (2)

A base frame, and an upper swing body provided so as to be pivotable with respect to the base; the upper swing body forms a skeleton of the upper swing body and is disposed in the front-rear direction; and a front portion of the main frame And a counterweight attached to the rear portion of the main frame, and a building cover that covers the power device placed on the upper swing body between the counterweight and the work device. In construction machinery
A height inclination adjusting means is provided between a rear portion of the main frame and the lower part of the counterweight, and the height inclination adjusting means is configured to adjust a correlation position between the building cover and the counterweight. Construction machinery characterized by that. The height inclination adjusting means includes a supporting means fixed to the rear portion of the main frame and having a tapered surface, and an adjusting means fixed to the rear portion of the main frame at a position spaced from the supporting means. And a moving means provided between the adjusting means and the supporting means, and the moving means is provided to be movable along the tapered surface of the supporting means by adjustment by the adjusting means. The construction machine according to claim 1, wherein

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