JP2007046240A - Vehicle body frame of construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate maintenance such as the attachment/detachment of piping of a cooling unit mounted on a cooling-unit mounting base. <P>SOLUTION: In this construction machine, a prime mover, the cooling unit, a hydraulic unit, etc. are mounted on a vehicle body frame, and these pieces of equipment are covered with a cover. In the cooling-unit mounting base 4 for mounting the cooling unit, a hole 30 is drilled near a connecting part of a lower radiator hose 12 of the cooling unit, and a hole 31 is drilled near a connecting part of a lower intercooler hose 13. A hose band B is loosened or firmly fastened by using each of the holes 30 and 31. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a body frame of a construction machine, and more particularly to maintenance of a cooling device mounted on a cooling device mounting base of a body frame.

  3 to 5 show a vehicle body frame 1 of a general construction machine. A boom mounting bracket 2 is erected at a front position in the center of the vehicle body frame 1 and a motor mount 3 is fixed at a rear position in the center. The cooling device mounting base 4 is provided on the side of the motor mounting base 3. A cooling device 5 is mounted on the cooling device mount 4. The lower part of the cooling device mounting base 4 is covered with a bottom plate 4A. Although illustration is omitted, after mounting a prime mover, a cooling device, a hydraulic device and the like, a cover is attached to the body frame 1 to cover these plural devices.

  The cooling device 5 has a structure in which an engine cooling radiator 6, an intake air cooling intercooler 7, and a hydraulic oil cooling oil cooler 8 are integrated with each other, and an upper radiator hose 9 is provided above each. The upper intercooler hose 10 and the upper oil cooler hose 11 are connected to each other, and the lower radiator hose 12, the lower intercooler hose 13, and the lower oil cooler hose (not shown) are connected to the lower portions thereof. Each of these pipes is inserted into a hose attachment port and fixed by a hose band B. Reference numeral 14 denotes a fan shroud.

In addition, a cooling water supply pipe (radiator hose) for supplying cooling water from the radiator to the engine is divided into two, and a joint means (intermediate connection pipe) is provided in a turning frame (body frame) between the engine and the radiator, There is known a radiator piping structure for a construction machine in which a radiator and a joint means are connected by a first cooling water supply pipe, and the joint means and the engine are connected by a second cooling water supply means (for example, Patent Document 1).
JP 2000-186555 A

  The body frame shown in FIGS. 3 to 5 is provided with the lower hose connection portion of the cooling device 5 mounted on the cooling device mounting base 4 close to the cooling device mounting base 4, so Loose or tightening work is difficult. In particular, since the vicinity of the hose band B is covered with the bottom plate 4A, the work from directly below is impossible. Therefore, maintenance properties such as hose removal are poor.

  In the invention described in Patent Document 1, since the cooling water supply pipe is divided into two parts, it is less affected by the vibration of the engine, thereby securing a space for preventing interference around the cooling water supply pipe. There is no need to do it. However, if the surrounding space is reduced, the maintainability such as hose attachment / detachment work deteriorates, and it is necessary to remove one of the cooling water supply pipes from the joint means each time maintenance is performed.

  Therefore, there is a technical problem to be solved in order to make it easy to perform maintenance such as pipe attachment / detachment of the cooling device mounted on the cooling device mounting base, and the present invention solves this problem. Objective.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is a construction in which a prime mover, a cooling device, a hydraulic device, etc. are mounted on a vehicle body frame, and these devices are covered with a cover. In a machine, there is provided a vehicle body frame for a construction machine, wherein a cooling device mounting base for mounting the cooling device has a maintenance hole formed in a bottom plate near a pipe connection portion of the cooling device. .

  According to this structure, the hole for maintenance is opened in the bottom plate of the cooling device mounting base, the tool is inserted from the hole to approach the piping connection portion of the cooling device, the hose band is relaxed, and the hose Remove. Also, when installing a hose, insert the hose into the hose attachment port in the reverse operation to the above, insert a tool through the hole in the bottom plate, approach the pipe connection part, tighten the hose bunt and tighten the hose. Fix it.

  In the present invention, as described above, since the hole for maintenance is opened in the bottom plate covering the lower part of the cooling device mounting base, the tool is inserted through the hole when the hose is attached and detached. Can be relaxed or tightened, and the piping of the cooling device can be easily detached and contributed to the improvement of the maintainability.

  Hereinafter, the vehicle body frame of the construction machine according to the present invention will be described with reference to preferred embodiments. For the purpose of facilitating maintenance such as piping removal and installation of the cooling device mounted on the cooling device mounting base, a prime mover, cooling device, hydraulic device, etc. are mounted on the body frame, and these multiple devices are covered with a cover. In the construction machine, the cooling device mounting base for mounting the cooling device is realized by opening a maintenance hole in the bottom plate near the piping connection portion of the cooling device.

  FIG. 1 shows a hydraulic excavator 20 as an example of a construction machine, and an upper swing body 23 is mounted on a lower traveling body 21 via a swing mechanism 22 so as to be rotatable. The upper swing body 23 is provided with a cab 24 at one front side thereof, and a boom 25 is attached to the front center portion so as to be able to be raised and lowered. Further, an arm 26 is attached to the tip of the boom 25 so as to be rotatable up and down, and a bucket 27 is attached to the tip of the arm 26.

  The upper swing body 23 is attached to the vehicle body frame 1 shown in FIG. Since the schematic part about the vehicle body frame 1 and the cooling device 5 and the like is completely the same as the structure shown in FIGS. 3 and 4, the description of the overlapping parts will be omitted.

  3 to FIG. 5 is a bottom plate of the cooling device mounting base 4 that is different from the structure of the vehicle body frame. As shown in FIG. 2, the bottom plate 4B covering the lower part of the cooling device mounting base 4 is used. Is provided with a maintenance hole in the vicinity of the pipe connection portion of the cooling device 5. For example, a hole 30 is opened near the connection portion of the lower radiator hose 12 of the bottom plate 4B, and a hole 31 is opened near the connection portion of the lower intercooler hose 13.

  Now, when performing maintenance on the radiator 6 of the cooling device 5, when removing the lower radiator hose 12, a tool (not shown) is inserted through the hole 30 opened in the bottom plate 4 </ b> B of the cooling device mounting base 4, The tool is brought close to the pipe connection portion of the lower radiator hose 12 of the radiator 6 to loosen the hose band B. In this state, if the lower radiator hose 12 is gripped from the lower opening 4 </ b> C of the cooling device mounting base 4, the lower radiator hose 12 can be pulled out and removed from the radiator 6.

  On the other hand, when the lower radiator hose 12 is attached to the radiator 6, the lower radiator hose 12 is gripped from the opening 4 </ b> C by the reverse operation to the above, and the lower radiator hose 12 is attached to the hose attachment port of the radiator 6. The lower radiator hose 12 can be attached to the radiator 6 by inserting the hose band B and inserting a tool from the hole 30 of the bottom plate 4B to tighten the hose band B.

  When removing the lower intercooler hose 13 when performing maintenance on the intercooler 7 of the cooling device 5, a tool is inserted through the hole 31 opened in the bottom plate 4B, and the lower radiator hose 12 is attached and detached. Similarly, the tool is brought close to the pipe connection portion of the lower intercooler hose 13 of the intercooler 7 to loosen the hose band B. In this state, if the lower intercooler hose 13 is gripped from the lower opening 4 </ b> C of the cooling device mounting base 4, the lower intercooler hose 13 can be pulled out and removed from the intercooler 7.

  When the lower intercooler hose 13 is attached to the intercooler 7, the lower intercooler hose 13 is gripped from the opening 4C by the reverse operation to the above, and the lower intercooler 7 is connected to the hose attachment port of the intercooler 7. When the intercooler hose 13 is inserted and the hose band B is attached, and a tool is inserted from the hole 31 of the bottom plate 4B and the hose band B is tightened, the lower intercooler hose 13 can be attached to the intercooler 7. .

  As described above, by providing the maintenance holes 30 and 31 in the bottom plate 4B of the cooling device mounting base 4, the hose band B can be easily relaxed and tightened using the holes 30 and 31. This makes it possible to improve the maintainability of the cooling device such as the removal of the pipe.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

1 is a side view of a hydraulic excavator to which the present invention is applied. The bottom view of the cooling device mounting base of the vehicle body frame which concerns on this invention. The perspective view which shows the vehicle body frame of a general construction machine. FIG. 4 is an enlarged side view of the cooling device mount shown in FIG. 3. The bottom view of the cooling device mounting base shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body frame 4 Cooling device mounting base 4A, 4B Bottom plate 5 Cooling device 6 Radiator 7 Intercooler 8 Oil cooler 12 Lower radiator hose 13 Lower intercooler hose 30, 31 Hole B Hose band

Claims (1)

In a construction machine with a prime mover, a cooling device, a hydraulic device, etc. mounted on the body frame, and these multiple devices covered with a cover,
A vehicle body frame for a construction machine, wherein a mounting hole for mounting the cooling device is provided with a maintenance hole in a bottom plate near a pipe connection portion of the cooling device.

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