JP2017066619A - Small hydraulic shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small hydraulic shovel that has an engine equipped with a supercharger and enables an intake air piping to be disposed by effectively using a surplus space in a revolving body.SOLUTION: A mini shovel according to this invention comprises: an engine room 7 storing an engine 8 equipped with a supercharger 9 and a cooling device room 10 adjacent to the engine room 7 and storing a radiator 13 and an oil cooler 14, which are provided on a revolving body 2 to which a work device 3 is installed; and intake air piping for leading the intake air to the engine 8, namely, first intake air piping 20, second intake air piping 21 and third intake air piping 22, which is arranged across the cooling device room 10 and the engine room 7. The radiator 13 and the oil cooler 14 are disposed in parallel in a longitudinal direction of the revolving body 2. The first intake air piping 20, the second intake air piping 21 and the third intake air piping 22 are disposed in a space 30 formed above the radiator 13 and the oil cooler 14.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a small hydraulic excavator having an intake pipe for supplying intake air to an engine via a supercharger.

  At the excavation site, for example, an ultra-small turning mini excavator where the turning radius in the minimum turning posture with the boom raised to the maximum and the working device closest to the operator's cab is less than the diameter of the turning frame at the bottom of the turning body, There are many small hydraulic excavators such as a small rear turning mini excavator that is located within the width of the left and right crawlers such as a traveling body on which the rotating body is placed only on the outer peripheral side of the counterweight. In such a small hydraulic excavator, since the device arrangement space in the cover in the revolving structure is extremely limited, it is necessary to devise the device arrangement in the cover so that the space is not wasted and can be used effectively.

  However, in a small hydraulic excavator with a supercharger engine and an intercooler disposed in an engine room located in front of the counterweight on the rear side of the revolving structure, intake air is supplied to the engine via the supercharger. There is not enough space for air intake piping. Therefore, in the past, it was necessary to lay out the layout in order to avoid interference with other equipment, water, and hydraulic oil piping arranged in the cover. There was a need to do.

  Patent Document 1 proposes a construction machine in which intercooler piping is arranged in spaces formed on both sides of a radiator upper tank in consideration of the ease of assembly and maintenance of the intercooler piping structure.

Japanese Patent Laid-Open No. 10-103065

  By the way, the pipe connecting the intercooler has a relatively large diameter of 50 mm to 60 mm, and in a radiator arranged in a small hydraulic excavator such as a mini excavator, a space for arranging the intercooler pipe on both sides of the upper tank should be secured. It is difficult. Further, Patent Document 1 proposes to arrange the intercooler piping by using an empty space on the side surface of the radiator. However, in a small hydraulic excavator such as a rear small turning mini-excavator or an ultra-small turning mini excavator, There is a counterweight attached to the rear end of the vehicle body frame on the side surface of the radiator, and it is difficult to secure a space in which piping can be arranged. For this reason, in these mini-excavators, it was not possible to adopt a layout in which intercooler piping is arranged on the side surface of the radiator.

  In order to solve the above-described problems, an object of the present invention is to provide a small hydraulic excavator that includes an engine with a supercharger and that can effectively utilize the surplus space in the swivel body and arrange the intake pipe. It is to provide.

  In order to achieve the above object, a small hydraulic excavator according to the present invention includes an engine room in which an engine with a supercharger is accommodated on a revolving body to which a work device is attached, and a radiator and an oil that are adjacent to the engine room. A small hydraulic excavator provided with a cooling device room in which a cooler is housed, and an intake pipe for guiding intake air to the engine extending from the cooling device room to the engine room. And the oil cooler are arranged in parallel, and the intake pipe is arranged in a space formed above the radiator and above the oil cooler.

  According to the small hydraulic excavator according to the present invention, the intake pipe is utilized by utilizing the space formed above the radiator and the oil cooler in the cooling device room, that is, effectively utilizing the surplus space in the swivel body. Can be arranged. Therefore, the present invention can also be applied to a small rear turning mini excavator, a very small turning mini excavator, and the like, and excellent versatility can be secured.

It is a side view which shows the mini excavator which comprises 1st Embodiment of the small hydraulic excavator which concerns on this invention. It is a top view which shows the inside of the turning body with which 1st Embodiment is equipped. It is the perspective view which looked at the turning body with which 1st Embodiment is equipped from the rear part side. It is a perspective view which shows the inside of the engine room with which 1st Embodiment is equipped. It is a perspective view which shows the inside of the cooling device room with which 1st Embodiment is equipped. It is a side view which shows the inside of the cooling device room with which 1st Embodiment is equipped. It is a perspective view which shows the inside of the cooling device room which comprises the principal part of 2nd Embodiment of this invention. It is a perspective view which shows the partition plate with which 2nd Embodiment is equipped, and an adapter. It is the perspective view which looked at the principal part of 3rd Embodiment of this invention from the rear part side of the turning body.

  Embodiments of a small hydraulic excavator according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a side view showing a mini-excavator constituting a first embodiment of a small hydraulic excavator according to the present invention, FIG. 2 is a plan view showing the inside of a revolving structure provided in the first embodiment, and FIG. 3 is a first embodiment. It is the perspective view which looked at the turning body with which a form is equipped from the rear side.

  As shown in FIG. 1, the first embodiment of the small hydraulic excavator according to the present invention is configured by a rear small turning type mini excavator. The mini excavator includes a traveling body 1, a revolving body 2 disposed on the traveling body 1, a working device 3 that is attached to the revolving body 2 so as to be rotatable in the vertical direction, and that performs excavation work of earth and sand. It has.

  A driver's cab 4 in which a driver's seat 5 is disposed is provided on the revolving structure 2, and a counterweight 6 is disposed at the rear end position of the revolving structure 2. Below the driver's seat 5, an engine room 7 is arranged. The counterweight 6 is formed in a semicircular shape, and the size is set in consideration of the balance with the work device 3 so that the excavation work capability of the work device 3 disposed in front of the revolving structure 2 can be exhibited. The height of the upper surface of the counterweight 6 is limited to a height at which the rear visibility from the driver's seat 5 can be kept good.

  Further, the height position 7 a of the ceiling portion of the engine room 7 is limited so as to be along the height of the upper surface of the counterweight 6. As shown in FIG. 2, an engine 8 provided with a supercharger 9 and hydraulic equipment such as a hydraulic pump are accommodated in the engine room 7 whose height position 7 a is restricted. A cooling device room 10 in which a radiator 13 and an oil cooler 14 are stored is provided adjacent to the engine room 7. An intake pipe that guides intake air to the engine 8 is arranged from the cooling device room 10 to the engine room 7.

  As shown in FIG. 3, the height position 7a of the ceiling part of the engine room 7 and the ceiling part 10a of the cooling device room 10 are set to substantially the same height, for example. That is, the height position of the cooling device room 10 is set so as to follow the height of the upper surface of the counterweight 6 in order to ensure good rear visibility like the height position 7a of the ceiling portion of the engine room 7. It is. A suction port 23 for guiding the intake air is formed in the side cover of the cooling device room 10. The driver seat 5 described above is disposed on the upper surface side of the partition wall member constituting the engine room 7 and at a position above the engine 8.

  4 is a perspective view showing the inside of the engine room provided in the first embodiment, FIG. 5 is a perspective view showing the inside of the cooling device room provided in the first embodiment, and FIG. 6 is a cooling provided in the first embodiment. It is a side view which shows the inside of an apparatus room.

  As shown in FIGS. 4 to 6, in this embodiment, the radiator 13 and the oil cooler 14 are arranged in parallel in the front-rear direction of the revolving structure 2. In addition, the above-described intake pipe is disposed in a space 30 formed above the radiator 13 and the oil cooler 14.

  Further, in the present embodiment, the intercooler 15 housed in the cooling device room 10 and arranged in series with the intake air suction port 23 and the air cleaner 16, that is, the intake air introduced from the suction port 23 are purified. And an air cleaner 16. The air cleaner 16 is disposed on the side close to the suction port 23, and the intercooler 15 is disposed on the side far from the suction port 23.

  A battery 19 is disposed in the cooling device room 10. A hydraulic oil tank 25 and a fuel tank 24 are arranged at a location adjacent to the cooling device room 10 on the revolving structure 2.

  The intake pipe described above includes a first intake pipe 20 that supplies intake air from the air cleaner 16 to the supercharger 9, a second intake pipe 21 that supplies intake air compressed by the supercharger 9 to the intercooler 15, It consists of a third intake pipe 22 that supplies the intake air cooled by the intercooler 15 to the engine 8.

  Moreover, the space part 30 mentioned above consists of the space part formed between the upper part of the radiator 13 and the oil cooler 14, and the ceiling part of the engine room 7, and the ceiling part 10a of the cooling device room 10. FIG.

  In the first embodiment, the first intake pipe 20, the second intake pipe 21, and the third intake pipe 22 are disposed above the oil cooler 14. The first intake pipe 20, the second intake pipe 21, and the third intake pipe 22 are inserted into through holes formed in the partition wall 18 that partitions the engine room 7 and the cooling device room 10.

  In the first embodiment configured as described above, the intake air introduced from the suction port 23 is cleaned by the air cleaner 16, and the cleaned intake air is supplied to the supercharger 9 via the first intake pipe 20. Led. The intake air compressed by the supercharger 9 is guided to the intercooler 15 via the second intake pipe 21. The intake air cooled by the intercooler 15 is supplied to the engine 8 via the third intake pipe 22 and used for driving the engine 8.

  According to the first embodiment, the space 30 formed above the radiator 13 and the oil cooler 10 in the cooling device room 10 is utilized, that is, the surplus space in the swivel body 2 is effectively utilized. Thus, the first intake pipe 20, the second intake pipe 21, and the third intake pipe 22 can be provided. Therefore, it can be applied to a mini excavator as in the first embodiment, and excellent versatility can be secured.

  Since each of the first intake pipe 20, the second intake pipe 21, and the third intake pipe 22 is inserted through a through hole formed in the partition wall 8, the first intake pipe 20, the second intake pipe 20, Each of the intake pipe 21 and the third intake pipe 22 can be stably held by the partition wall 18.

  In addition, the first intake pipe 20, the second intake pipe 21, and the third intake pipe 22 are connected to the top of the radiator 13 and the oil cooler 14, the ceiling of the engine room 7, and the ceiling 10 a of the cooling device room 10. Since the first intake pipe 20, the second intake pipe 21, and the third intake pipe 22 are not exposed to the outside, the external foreign matter is disposed in the space 30 formed between the upper portion and the upper portion. Can be protected from.

  FIG. 7 is a perspective view showing the inside of the cooling device room constituting the main part of the second embodiment of the present invention, and FIG. 8 is a perspective view showing a partition plate and an adapter provided in the second embodiment.

  As shown in FIG. 7, in the second embodiment, the first intake pipe 20 and the second intake pipe 21 are arranged above the oil cooler 14, and the third intake pipe 22 is arranged above the radiator 13. It is.

  As shown in FIG. 8, in the second embodiment, a first adapter 41, a second adapter 42, and a third adapter 43, which are attached to the partition wall 18 and each form a cylindrical body having a through hole, are integrally provided. The partition member 40 is provided. The partition wall 18 is formed with a hole that allows the first adapter 41, the second adapter 42, and the third adapter 43 to be arranged.

  Moreover, this 2nd Embodiment consists of what the 1st intake piping 20 is dividedly connected by the engine room 7 side and the cooling device room 10 side in the 1st adapter 41. FIG. Further, the second intake pipe 21 is constituted by the second adapter 42 that is dividedly connected between the engine room 7 side and the cooling device room 10 side. Similarly, the third intake pipe 42 is composed of a third adapter 43 that is dividedly connected between the engine room 7 side and the cooling device room 10 side. Other configurations are the same as those of the first embodiment described above.

  In the second embodiment configured as described above, the first intake pipe 20, the second intake pipe 21, and the third intake pipe 22 are arranged above the radiator 13 and the oil cooler 14, and the ceiling portion of the engine room 7. Since it is disposed in the space 30 formed between the cooling device room 10 and the ceiling 10a, the same effects as those of the first embodiment described above can be obtained.

  In the second embodiment, the divided portions of the first intake pipe 20, the second intake pipe 21, and the third intake pipe 22 on the cooling device room 10 side, and the first intake pipe 20 on the engine room 7 side are also provided. Since the respective divided portions of the second intake pipe 21 and the third intake pipe 22 are connected to the corresponding adapter among the first adapter 41, the second adapter 42, and the third adapter 43, the first implementation is performed. There is no need for the complicated operation of directly inserting into the through-hole formed in the partition wall 18 as in the embodiment, and the disposing operation of the first intake pipe 20, the second intake pipe 21, and the third intake pipe 22 is the first. It is simpler than in the embodiment.

  FIG. 9 is a perspective view of the main part of the third embodiment of the present invention as viewed from the rear side of the revolving unit.

  In the third embodiment shown in FIG. 9, the ceiling portion 10 a of the cooling device room 10 is set to be higher than the height position 7 a of the ceiling portion of the engine room 7. That is, the ceiling part 10 a of the cooling device room 10 is set higher than the ceiling part of the engine room 7. Other configurations are the same as those of the first embodiment described above.

  The third embodiment configured as described above can obtain the same effect as that of the first embodiment, and can secure a wide space 30 formed above the radiator 13 and above the oil cooler 4. The workability of the work of arranging the first intake pipe 20, the second intake pipe 21, and the third intake pipe 22 can be improved.

DESCRIPTION OF SYMBOLS 1 Traveling body 2 Revolving body 3 Working device 5 Driver's seat 7 Engine room 7a Height position 8 Engine 9 Supercharger 10 Cooling device room 10a Ceiling part 13 Radiator 14 Oil cooler 15 Intercooler 16 Air cleaner 18 Partition wall 20 First intake piping 21 Second intake pipe 22 Third intake pipe 23 Suction port 30 Space portion 40 Partition member 41 First adapter 42 Second adapter 43 Third adapter

Claims (5)

An engine room that houses an engine with a supercharger and a cooling room that houses a radiator and an oil cooler are disposed adjacent to the engine room on a revolving structure to which a working device is attached. In a small hydraulic excavator in which an intake pipe that guides the engine is disposed from the cooling device room to the engine room
The radiator and the oil cooler are arranged in parallel in the longitudinal direction of the swivel body,
A small-sized hydraulic excavator characterized in that the intake pipe is disposed in a space formed above the radiator and above the oil cooler. The small hydraulic excavator according to claim 1,
An intercooler and an air cleaner housed in the cooling device room and arranged in series with the intake air suction port, the air cleaner being closer to the suction port, and the intercooler being farther from the suction port, respectively. Place and
The intake pipe includes a first intake pipe for supplying intake air from the air cleaner to the supercharger, a second intake pipe for supplying intake air compressed by the supercharger to the intercooler, and the intercooler. A third intake pipe for supplying cooled intake air to the engine;
The small-sized hydraulic excavator is characterized in that the space portion includes a space portion formed between the radiator and the oil cooler, and the ceiling portion of the engine room and the cooling device room. The small excavator according to claim 2,
A small hydraulic excavator, wherein the ceiling portion of the engine room and the ceiling portion of the cooling device room are set at substantially the same height. The small excavator according to claim 2,
A small hydraulic excavator, wherein the ceiling portion of the cooling device room is set higher than the ceiling portion of the engine room. The small hydraulic excavator according to any one of claims 2 to 4,
A partition wall that partitions the engine room and the cooling device room;
A first adapter, a second adapter, and a partition member integrally provided with a third adapter, each of which is attached to the partition wall and forms a cylindrical body having a through hole
The first intake pipe is configured to be divided and connected at the engine room side and the cooling device side in the first adapter,
The second intake pipe is configured to be divided and connected on the engine room side and the cooling device side in the second adapter,
The small hydraulic excavator is characterized in that the third intake pipe is divided and connected to the engine room side and the cooling device side in the third adapter.