JP6473263B1 - Disassembly type construction machine - Google Patents

Abstract

An object of the present invention is to provide a disassembly type construction machine that can be realized at low cost because it is not necessary to perform machining such as cutting and tapping on a lower traveling body.
In a construction machine 1 in which an upper revolving unit 2 is provided on an upper part of a lower traveling unit 3 so as to be capable of revolving through a revolving wheel 14, the upper revolving unit 2 is vertically moved between the revolving wheel 14 and the lower traveling unit 3. A cylindrical bracket 16 having flanges 17 and 18 is inserted, and the upper flange 17 of the swivel wheel 14 is the same as the female screw hole provided on the installation surface connected to the swivel wheel 14 of the lower traveling body 3. The lower flange 18 on the lower traveling body 3 side is provided with a bolt insertion having the same pitch circle diameter, spacing and hole diameter as those of the bolt insertion holes provided on the swivel wheel 14 connected to the lower traveling body 3. A hole was provided.
[Selection] Figure 1

Description

  TECHNICAL FIELD The present invention relates to an excavator excavator having an upper revolving unit that can be revolved via a swivel bearing on an upper part of a lower traveling unit, and relates to a disassembly type construction machine that can disassemble the lower traveling unit and the upper revolving unit. It is.

  Conventionally, as shown in FIG. 12, in a construction machine, a swing bearing 22 is disposed between an upper swing body 20 and a lower travel body 21, and the upper portion of the lower travel body 21 is interposed via the swing bearing 22. The upper turning body 20 is disposed so as to be turnable.

  The slewing bearing 22 includes a plurality of rolling elements 25 interposed between an inner ring 23 and an outer ring 24, and the inner ring 23 is fixed by a plurality of mounting bolts 26 from the inside of the upper slewing body 20.

  A bracket 28 having an upper flange portion 27 on the upper outer periphery protrudes from the lower traveling body 21, and a plurality of connecting bolts 29 are inserted from below the upper flange portion 27 toward the outer ring 24, By being fastened, the lower traveling body 21 and the swivel bearing 22 are connected.

  When the upper revolving unit 20 and the lower traveling unit 21 of the construction machine described above are divided and transported, a plurality of connecting bolts that connect the mounting piece 27 of the bracket 28 and the outer ring 24 of the revolving bearing 22 are connected. 29, the connecting bolt 29 is fastened from the bottom to the top due to the arrangement structure of each member. Therefore, it is necessary to lift the weight of the bolt, collar and upper tool. The workability of was bad.

The following patent document is proposed as providing a construction machine that has a simple structure, can efficiently divide the upper revolving unit and the lower traveling unit, and is convenient for transportation.
Japanese Patent Laid-Open No. 7-277789

  As shown in FIG. 11, this Patent Document 1 is a construction machine in which a swing bearing 4 is arranged between an upper swing body 2 and a lower traveling body 3, and a flange portion 12 is formed on the outer periphery of the lower portion of the swing bearing 4. Then, the flange portion was fastened to the lower traveling body with a connecting bolt 13.

  The slewing bearing 4 includes a plurality of rolling elements 7 interposed between an inner ring 5 and an outer ring 6, and the rotating inner ring 5 is fixed by a plurality of mounting bolts 8 from the inside of the upper swing body 2.

  A bracket 9 is disposed below the outer ring 6, and the upper flange 10 of the bracket 9 and the outer ring 6 are fixed to each other with a plurality of mounting bolts 11.

  In the bracket 9, a lower flange portion 12 having a diameter larger than that of the outer ring 6 is formed on the outer periphery of the lower portion, and a plurality of bolt insertion holes are formed in the lower flange portion 12 at equal intervals.

  Further, a plurality of female screw holes having the same central axis as the bolt insertion holes are provided in the frame of the lower traveling body 3 at equal intervals like the bolt insertion holes. The bracket 9 and the frame are connected by aligning the positions of the female screw hole and the bolt insertion hole of the lower flange portion 12 and inserting and fastening the connecting bolt 13 from the lower flange portion 12 side. The upper swing body 2 is connected integrally with the inner ring 5 of the swing bearing 4, and the lower traveling body 3 is connected integrally with the outer ring 6 of the swing bearing 4 via a bracket 9.

  Thus, when transporting the construction machine 1, the upper swing body 2 is removed by removing the plurality of connecting bolts 13 that connect the frame of the lower traveling body 3 and the lower flange portion 12 of the bracket 9. And the lower traveling body 3 can be divided.

  At this time, since the plurality of connecting bolts 13 are fastened downward from above the large-diameter lower flange portion 12, the connecting bolts 13 can be easily removed without contacting other members. The upper revolving unit 2 and the lower traveling unit 3 can be divided efficiently.

  Further, when the upper swing body 2 is assembled to the lower traveling body 3, it can be easily assembled by fastening the frame of the lower traveling body 3 and the lower flange portion 12 of the bracket 9 with the connecting bolt 13.

  At this time, the connecting bolt 13 can be naturally positioned in the screw hole, and the bolt insertion hole of the lower flange portion 12 and the female screw hole of the frame are provided at equal intervals, so any direction Can be assembled with.

  Furthermore, since the diameter of the lower flange portion 12 is formed to be large, the stability of the upper swing body 2 can be improved, and conventionally, a pedestal or the like may be attached to the frame in order to balance the center of gravity. However, the stability of the upper swing body 2 can be ensured without particularly mounting a pedestal or the like.

  In the construction machine 1 of Patent Document 1, the diameter of the lower flange portion 12 of the bracket 9 is formed large in order to improve the stability of the upper swing body 2.

  In order to insert such a bracket, the bracket that has conventionally been projected from the lower traveling body is removed. In addition, it is considered that the bolt insertion hole on the slewing bearing side is the same as the pitch circle diameter of the female screw hole of the slewing bearing, but the bolt insertion hole on the lower traveling body side is newly provided on the lower traveling body side. It seems to be the same as the pitch circle diameter of the female screw hole provided.

  Such a method requires machining such as cutting and tapping on the lower traveling body, which is cumbersome and expensive.

  The object of the present invention is to eliminate the inconvenience of the conventional example, and to easily perform the bolt detachment work for dividing by making the bolt head into a positional relationship that is the outside of the machine in order to insert the bracket, An object of the present invention is to provide a disassembly type construction machine that can be realized at low cost without troublesome work because it is not necessary to perform machining such as cutting and tapping on the lower traveling body.

The present invention of claim 1, wherein in order to achieve the above object, a construction machine which is provided pivotably via a pivoting wheels upper rotating body on the lower traveling body, the upper rotating body slewing ring and the lower traveling body A bracket is inserted between the flanges , and the bracket is a cylindrical body having upper and lower flanges of the same diameter. The upper flange on the swivel wheel side has a female screw in the flange portion provided on the installation surface of the lower traveling body. The same female screw hole as that of the hole is provided, and the bolt insertion hole having the same pitch circle diameter, spacing and hole diameter as those of the bolt insertion hole provided in the swivel wheel is provided in the lower flange on the lower traveling body side of the bracket. Is a summary.

  According to the first aspect of the present invention, the bracket is configured to be inserted between the swivel bearing and the lower traveling body, and the shape is a cylindrical body having flange portions at both ends.

  In the conventional state, the head of the connecting bolt at the divided portion is invisible from the outside of the machine. Therefore, it is difficult to remove and attach the bolt for dividing, but the present invention inserts a cylindrical body having a flange portion. Thus, the bolt removing operation for dividing the bolt head can be easily performed by bringing the bolt head into the positional relationship on the outside of the machine.

  According to the first aspect of the present invention, the flange on the slewing bearing side is provided with the female screw hole. The pitch diameter, interval, and screw diameter of the female screw holes are the same as those of the female screw holes provided on the installation surface of the track frame (lower traveling body) connected to the swivel bearing.

  The flange on the lower traveling body side is provided with a bolt insertion hole. The pitch circle diameter, the interval, and the hole diameter of the bolt insertion holes are the same as those of the bolt insertion holes provided in the swivel wheel of the slewing bearing connected to the lower traveling body.

  Since the female screw hole and the bolt insertion hole provided in the flange portion in this manner use the dimensions of those provided in the conventional lower traveling body and the swivel bearing, in order to insert the bracket, No processing is required.

  Furthermore, since the mounting position of the cylindrical bracket is at a position lower than the center of gravity of the upper swing body as seen from the fixing position of the lifting tool for hanging the upper swing body during the suspension work, the effect of lowering the center of gravity can be obtained, Stability during hanging work can be improved.

  The gist of the present invention described in claim 2 is that the outer diameter of the lower flange is greater than the outer diameter of the installation surface of the lower traveling body, and the inner diameter of the lower flange is the same as the inner diameter of the cylindrical bracket. It is.

  According to the second aspect of the present invention, the outer diameter of the cylindrical bracket is formed smaller than the inner diameter of the installation surface of the lower traveling body so as not to interfere with the mounting of the bolt that connects the lower traveling body and the cylindrical bracket. Therefore, the inner diameter of the lower flange is formed smaller than this. Thereby, since the flange surface of a lower flange has a larger area than the installation surface of a lower traveling body, stability can be improved with respect to the time of installation to a plane.

  As described above, the disassembly type construction machine of the present invention can easily perform the bolt removing operation for dividing by making the bolt head into a positional relationship that is the outside of the machine in order to insert the bracket, Since the conventional structure does not require machining, there is no troublesome work and it can be realized at low cost.

It is a side view showing one embodiment of the decomposition type construction machine of the present invention. It is explanatory drawing which shows one Embodiment of the decomposition | disassembly type | mold construction machine of this invention. It is a top view of the bracket used with the decomposition | disassembly type | mold construction machine of this invention. It is a side view of the bracket used with the decomposition | disassembly type | mold construction machine of this invention. It is a bottom view of the bracket used with the decomposition-type construction machine of this invention. It is an A line arrow directional view of FIG. It is a B line arrow directional view of FIG. It is a C line arrow directional view of FIG. It is a vertical side view of the state which attached the bracket used with the decomposition-type construction machine of this invention to the lower traveling body. It is a side view of the state which does not insert a bracket with the decomposition | disassembly type | mold construction machine of this invention. It is a vertical side view of the principal part which shows a prior art example. It is a vertical side view of the main part of the conventional construction machine.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing an entire disassembled construction machine according to the present invention, and FIG. 2 is an explanatory view of the same. In FIG. 1, the same components as those in FIG.

  As shown in FIG. 9, the disassembly type construction machine of the present invention is also provided on the upper part of the lower traveling body 3 so that the upper swing body 2 can be swung via a swivel wheel 14 (corresponding to the swivel bearing 4 in FIGS. 9 and 10). It is a thing.

  The upper swing body 2 is turnably disposed on the upper portion of the lower traveling body 3 via a swirl wheel 14 between the upper swing body 2 and the lower traveling body 3.

Undercarriage 3, toward the slewing ring 14, a plurality of connecting bolts are inserted, by being fastened, a flange portion 15 where the lower traveling body 3 and the turning wheels 14 are connected, the upper A plurality of connecting bolts are inserted and fastened toward the outer ring of the turning wheel 14 of the turning body 2, whereby the lower traveling body 3 and the turning wheel 14 are connected.

  As shown in FIG. 9, the present invention inserts a bracket 16 between the turning wheel 14 of the upper turning body 2 and the flange portion 15 of the lower traveling body 3. Are provided with upper and lower flanges 17 and 18 having the same outer diameter, and the upper flange 17 on the side of the turning wheel 14 is provided with a flange portion provided on an installation surface connected to the turning wheel 14 of the lower traveling body 3. The same female screw hole 19 as the 15 female screw holes was provided.

  Also, the lower flange 18 on the lower traveling body 3 side of the bracket 16 has the same pitch circle diameter, spacing and hole diameter as those of the bolt insertion holes provided in the turning wheel 14 connected to the flange portion 15 of the lower traveling body 3. Bolt insertion hole 30 was provided.

  The lower flange 18 of the cylindrical bracket 16 has the same pitch circle diameter and interval of the female screw holes provided on the installation surface connected to the swivel transport 14 of the lower traveling body 3, and has a contact area of normal construction. In order to ensure the same level as the machine, the outer diameter of the lower flange 18 was formed to be greater than the outer diameter of the installation surface of the lower traveling body 3.

  On the other hand, the inner diameter of the lower flange 18 is the same as the inner diameter of the cylindrical bracket 16, but the outer diameter of the cylindrical bracket 16 does not interfere with the mounting of the bolt that connects the lower traveling body 3 and the cylindrical bracket. Since it is formed smaller than the inner diameter of the installation surface of the lower traveling body 3, the inner diameter of the lower flange 18 is formed smaller than this.

  That is, as shown in FIG. 9, the width β of the lower flange 18 is set to be wider than the width α of the flange portion 15 of the lower traveling body 3.

  The ring body main body of the bracket 16 is inserted between the upper and lower flanges 17 and 18 and the ribs 31 provided outside the ring body main body to ensure strength.

  Next, the usage will be described. As shown in FIG. 9, the construction machine 1 is provided with an upper swing body 2 on the upper portion of the lower traveling body 3 so that the upper swing body 2 can be turned via a turning wheel 14.

  In this state, the heads of the connecting bolts at the divided locations are in a location that cannot be seen from the outside of the machine in the conventional state. Therefore, it is difficult to remove and install the bolts for dividing.

  A bracket 16 is inserted between the turning wheel 14 of the upper turning body 2 and the flange portion 15 of the lower traveling body 3.

  The upper flange 17 of the bracket 16 is aligned with the turning wheel 14, and the bolt insertion hole provided in the turning wheel 14 and the female screw hole 19 of the upper flange 17 are fastened with bolts.

  Further, the lower flange 18 of the bracket 16 is aligned with the flange portion 15 of the lower traveling body 3, and the bolt insertion hole provided in the lower flange 18 and the bolt insertion hole 30 provided in the lower flange 18 are fastened with bolts.

DESCRIPTION OF SYMBOLS 1 ... Construction machine 2 ... Upper revolving body 3 ... Lower traveling body 4 ... Slewing bearing 5 ... Inner ring 6 ... Outer ring 7 ... Roller 8, 11 ... Mounting bolt 9 ... Bracket 10 ... Upper flange part 12 ... Lower flange part 13 ... Connecting bolt 14 ... turning wheel 15 ... flange 16 ... bracket 17 ... upper flange 18 ... lower flange 19 ... female screw hole 20 ... upper turning body 21 ... lower running body 22 ... turning bearing 23 ... inner ring 24 ... outer ring 25 ... rolling Child 26 ... Mounting bolt 27 ... Upper flange portion 28 ... Bracket 29 ... Connecting bolt 30 ... Bolt insertion hole 31 ... Rib

Claims (2)

In a construction machine in which an upper swing body is provided on the upper part of the lower traveling body so that the upper swing body can be swung via a swirling wheel , a bracket is inserted between the swirling wheel of the upper swing body and the flange of the lower traveling body, and the bracket has the same diameter. The upper flange of the swivel wheel is provided with the same female screw hole as the female screw hole of the flange portion provided on the installation surface of the lower traveling body, and the lower traveling body side of the bracket. A disassembly type construction machine, wherein a bolt insertion hole having the same pitch circle diameter, spacing and hole diameter as those of the bolt insertion holes provided in the swivel wheel is provided in a lower flange. The disassembly type construction machine according to claim 1, wherein an outer diameter of the lower flange is formed to be equal to or larger than an outer diameter of an installation surface of the lower traveling body, and an inner diameter of the lower flange is the same as an inner diameter of the cylindrical bracket.