JPH0716040Y2 - Arrangement structure of air cleaner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an arrangement structure of an air cleaner to be mounted on a construction machine that has been endeavored to reduce a swing radius of an upper swing body.

2. Description of the Related Art FIG. 4 is a partially cutaway side view of a wheel type excavator 2 equipped with an air cleaner 1 having a prior art arrangement structure. In the figure, 3 is a lower traveling structure, 4 is an upper revolving structure, 5
Is a counterweight attached to the rear end of the upper swing body 4, 6 is a cooling air passage formed in the counterweight 5, 7 is a driver's cab, 8 is an engine, 9 is an engine 8
A fan mounted on the side, 10 is a radiator with an oil cooler, 11 is an intake pipe of the air cleaner 1, and 12 is a slewing bearing. FIG. 5 is a partial cross-sectional plan view seen from A in FIG. Reference numeral 13 is an intake pipe of the air cleaner 1, 14 is a control valve for controlling various hydraulic actuators, O'is a swing center of the swing body 4, and R'is a rear swing radius of the upper swing body 4.

Next, the arrangement structure and function of the conventional air cleaner 1 will be described with reference to FIGS. 4 and 5. The engine 8 is mounted on the side of the revolving superstructure 4 on the side opposite to the driver's cab 7 such that the crankshaft (not shown) of the engine 8 is parallel to the front-rear direction of the upper revolving superstructure 4, The counterweight 5 attached to the rear end of the body 4 has a cooling air passage 6
The engine intake air cleaner 1 is attached near the rear of the engine 8. So the outside air
By the rotation of the fan 9, the air passes through the air passage 6 in the direction of arrow a and is sucked into the engine compartment of the upper swing body 4. Part of the air is supplied into the engine 8 through the intake pipe 11 of the air cleaner 1, the inside of the air cleaner 1, and the intake pipe 13. Most of the air taken in from the air passage 6 is ventilated around the radiator with an oil cooler and the outer periphery of the engine. As a result, the air cools the engine cooling water, the hydraulic oil, and the engine peripheral parts.

Problems to be Solved by the Invention In the wheel type shovel having the arrangement structure of the prior art air cleaner, the engine is mounted so that the crankshaft of the engine is parallel to the front-back direction of the upper swing body,
A radiator with an oil cooler and an air cleaner are located behind the engine. As a result, the length L in the front-rear direction of the engine (including the connection of the hydraulic pump section B) becomes long as shown in FIG. 5, and the rear end turning radius R'of the upper revolving superstructure becomes considerably large. In addition, the air whose temperature has risen in the engine chamber from the intake pipe B of the air cleaner is sucked due to the irregular air flow path, which may cause a reduction in the engine output.

An object of the present invention is to solve the above-mentioned problems and to provide an arrangement structure for an air cleaner that is most suitable for a swing reduction structure of an upper swing body.

Means for solving the problems a. From the outside of the counterweight for the upper revolving structure, an air passage communicating with a radiator with an oil cooler, which is arranged separately from the engine, is formed in the counterweight. On the other hand, an engine intake air cleaner is fixedly provided near the rear side of the engine, and Further, an air intake chamber is provided on the inner side of the counter weight on the rear side of the engine, and an air intake window hole communicating with the air passage of the counter weight is provided in the air intake chamber, and an intake pipe of the air cleaner is provided in the air intake chamber. I made it open.

Action a. The radiator with an oil cooler is installed separately from the engine. Since the air cleaner is fixedly provided near the rear side of the engine, the engine-related front-rear direction length l is shorter than the length L of the prior art. As a result, it was possible to set the attachment position of the air cleaner and its arrangement structure that are suitable for the upper swing body of the swing reduction structure.

B. Among the cooling air sucked from the air passage of the counterweight, the air close to the air suction chamber provided on the inner surface side of the counterweight is, along the inner surface side of the counterweight,
After passing through the intake window hole of the air intake chamber and the air intake chamber, the air passes through a consistent ventilation passage that reaches the intake pipe B of the air cleaner.
As a result, the temperature-increased air in the engine compartment is no longer supplied into the engine.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway rear view of a wheel type shovel 16 equipped with an air cleaner 15 according to the present invention.
In the figure, the same reference numerals are given to those using the same constituent elements as those in the prior art. 17 is an upper revolving structure, 18 is a counterweight, 19 is an air passage formed in the counterweight 18, 20 is a rib plate member on the inner surface of the counterweight 18, 21 is an intake pipe of the air cleaner 15, 22 is intake piping, 23
Is an engine, 24 is a radiator with an oil cooler, and 25 is a fan. FIG. 2 is a plan view of an essential part seen from BB in FIG. In the figure, 26 is an air intake chamber formed in a box shape by a rib plate member 20, etc., 27 is an intake window hole portion of the air intake chamber 26, 28 is an oil motor for driving a fan 25, 29 is a support bracket member, and O Is the swing center of the upper swing body 17, and R is the rear-end swing radius.

In the conventional wheel type shovel 2, as shown in FIG. 5, a radiator 10 with an oil cooler is arranged in series on the rear side of the engine 8. As a result, the engine-related front-rear direction length L (including the connection of the hydraulic pump section B) becomes long,
The rear end turning radius R'of the upper turning body 5 was considerably large. However, in the wheel type shovel 16 of the present invention, the radiator 24 with an oil cooler is arranged separately from the engine 23 as shown in FIG. Has been shortened more than. Therefore, the rear end turning radius R of the upper revolving structure 17 is made smaller than that of the prior art (R ').

FIG. 3 is a sectional view of the counterweight 18 and the air suction chamber 26 as seen from the CC of FIG.

Next, the arrangement structure of the air cleaner 15 according to the present invention will be described with reference to FIGS. An air passage 19 is provided in the counterweight 18 so as to communicate with the radiator 24 with an oil cooler, which is arranged separately from the engine 23, from the outer side c of the counterweight 18. On the other hand, place the engine intake air cleaner 15 near the rear side of the engine 23,
The air cleaner 15 was provided with its longitudinal direction oriented vertically. Further, an air intake chamber 26 is provided on the inner surface side of the counterweight 18 on the rear side of the engine 23, and the air intake chamber 26 has an intake window hole portion communicating with the air passage 19 of the counterweight 18.
27 is installed, and an air cleaner is installed in the air intake chamber 26.
It was constructed by opening 15 intake pipes 21.

Next, the function and function of the arrangement structure for the air cleaner 15 according to the present invention will be described. Since the radiator 24 with an oil cooler is arranged separately from the engine 23, and the air cleaner 15 is fixedly provided near the rear side of the engine 23, the engine-related front-rear direction length l is shorter than the length L of the prior art. Was done. As a result, it was possible to set the mounting position of the air cleaner 15 and its arrangement structure that are suitable for the upper swing body 17 of the swing reduction structure. Further, among the cooling air sucked from the air passage 19 of the counterweight 18, an air suction chamber 26 provided on the inner surface side of the counterweight 18 as shown by an arrow D in FIG.
The air close to is along the inner surface side of the counterweight 18,
After passing through the window hole portion 27 of the air suction chamber 26 and the air suction chamber 26, it passes through a consistent ventilation passage reaching the intake pipe (21) of the air cleaner (15). As a result, the air whose temperature has risen in the engine compartment
It is no longer supplied to the engine.

Effect of the Invention In a conventional wheel type shovel having an air cleaner arrangement structure, the engine is mounted so that the crankshaft of the engine is parallel to the front-rear direction of the upper revolving structure.
A radiator with an oil cooler and an air cleaner are located behind the engine. As a result, the length L in the front-rear direction of the engine (including the connection of the hydraulic pump section B) becomes long as shown in FIG. 5, and the rear end turning radius R'of the upper revolving superstructure becomes considerably large. In addition, the air whose temperature has risen in the engine chamber from the intake pipe B of the air cleaner is sucked due to the irregular air flow path, which may cause a reduction in the engine output.

However, with the arrangement structure of the air cleaner according to this invention,
An air passage communicating from the outside of the upper revolving structure counterweight to the radiator with an oil cooler separated from the engine is formed in the counterweight, while the engine intake air cleaner is installed in the rear of the engine. Is provided near the inside of the counterweight, an air intake chamber is provided on the inner surface of the counterweight on the rear side of the engine, and the air intake chamber is provided with an intake window hole communicating with the air passage of the counterweight. The chamber was constructed by opening the intake pipe b of the air cleaner. As a result, it was possible to set the attachment position of the air cleaner and its arrangement structure that are suitable for the upper swing body of the swing reduction structure. Further, a part of the cooling air sucked from the air passage of the counterweight can be effectively supplied to the engine through the air cleaner according to the consistent ventilation passage.

[Brief description of drawings]

FIG. 1 is a partially cutaway rear view of a wheel type shovel equipped with an air cleaner according to the present invention, and FIG. 2 is a rear view of FIG.
Fig. 3 is a plan view of the main parts as seen from BB, Fig. 3 is a sectional view of the counterweight and the air suction chamber as seen from CC of Fig. 2, and Fig. 4 is one of the wheel type excavators equipped with an air cleaner having a prior art arrangement structure. Partial cutaway side view, FIG. 5 is a partial sectional plan view seen from A in FIG. 1,15 …… Air cleaner 2,16 …… Wheel type excavator 4,17 …… Upper revolving structure 5,18 …… Counter weight 6,19 …… Air passage 8,23 …… Engine 10,24 …… With oil cooler Radiator 11, 21 …… Intake pipe B 20 …… Rib plate member 26 …… Air intake chamber 27 …… Intake window hole

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. An engine is mounted on a side of an upper revolving structure opposite to a driver's cab so that a crankshaft of the engine is parallel to the front-rear direction of the upper revolving structure, and at the rear end of the upper revolving structure. In a construction machine equipped with a cooling air passage in the installed counterweight and equipped with an engine intake air cleaner in the vicinity of the engine, the oil placed separately from the engine from the outside of the upper revolving structure counterweight. An air passage communicating with the radiator with a cooler is formed in the counterweight, while an air cleaner for engine intake is fixedly provided in the vicinity of the rear side of the engine, and air is sucked into the inner surface of the counterweight on the rear side of the engine. A chamber is provided, and an air intake chamber is provided with an intake window hole communicating with the air passage of the counterweight. Arrangement of the air cleaner, characterized in that entry has been constructed allowed the opening of the intake pipe B of the air cleaner to.