JP6482949B2 - Excavator - Google Patents

Description

  The present invention relates to an excavator having a vacuator valve attached to an air cleaner.

  An excavator having a vacuator valve attached to an air cleaner is known (see Patent Document 1). Specifically, a dust discharge port is formed in the casing of the air cleaner, and one end of a tube member is attached to the dust discharge port. The vacuator valve is attached to the other end of the tube member. With this configuration, the attachment position of the vacuator valve to the frame can be freely set, and the vacuator valve can be arranged at a position where dust does not fall on devices such as electronic components.

JP 2005-171770 A

  However, since a tube member is attached to the dust discharge port of the air cleaner of Patent Document 1, the tube member becomes an obstacle when accessing the devices under the air cleaner.

  In view of the above, it is desirable to provide an excavator with a dust discharge structure that enhances accessibility to equipment under the air cleaner.

An excavator according to an embodiment of the present invention is mounted in a lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a house formed in the upper revolving body, and separates air and dust. and the air cleaner it, the mounted on the upper swing structure, together with the air separated by the air cleaner is supplied to the combustion chamber, then, the engine is discharged as exhaust gas, longitudinal dust discharged from the air cleaner A structure including a conduit passing through and an open / close cover attached to the frame of the upper swing body so as to be openable and closable, and at least a part of the structure including the conduit is attached to the open / close cover.

  By the above-mentioned means, it is possible to provide a shovel having a dust discharge structure that enhances accessibility to the equipment under the air cleaner.

It is a left view of an excavator. It is the schematic of the structural example inside the house of an upper revolving structure. It is a figure of the left side surface of an upper turning body. It is the schematic of the structural example of a dust discharge structure. It is the schematic of another structural example inside the house of an upper revolving structure. It is the schematic of another structural example of a dust discharge structure. It is a figure of the right side of an upper revolving structure.

  Non-limiting exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In the description of all attached drawings, the same or corresponding members or parts are denoted by the same or corresponding reference numerals, and redundant description is omitted. Also, the drawings are not intended to show relative ratios between members or parts unless otherwise specified. Accordingly, specific dimensions can be determined by one skilled in the art in light of the following non-limiting embodiments.

  In addition, the embodiments described below are examples, not limiting the invention, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

  FIG. 1 is a left side view of an excavator (excavator) according to an embodiment of the present invention. In the present embodiment, a hydraulic excavator will be described as an example of an excavator.

  The excavator mainly includes a lower traveling body 1, an upper swing body 2, and an attachment 3. An upper swing body 2 is mounted on the upper portion of the lower traveling body 1 so as to be capable of swinging, and an attachment 3 is attached to the front side of the upper swing body 2. The attachment 3 includes a drilling attachment including a boom 4, an arm 5, and a bucket 6.

  Further, in the present specification, the front side of the upper swing body 2 is a portion on the side where the boom 4 is attached as viewed from the center of the upper swing body 2. Further, the left side is a side located on the left side when the operator faces forward (X1 direction) in the upper swing body 2. Further, the right side is the side located on the right when the operator faces forward (X1 direction) in the upper swing body 2.

  The lower traveling body 1 is mainly composed of a pair of left and right crawlers, and is configured to move the excavator forward or backward.

  The upper swing body 2 mainly includes a cab 2a, a swing frame 2b, a house frame 2c, and a house cover 2d. The cab 2 a is installed on the front left side of the upper swing body 2. The turning frame 2b constitutes the bottom of the upper turning body 2 and supports the cab 2a. The house frame 2c constitutes a framework of a house that is disposed behind the cab 2a on the revolving frame 2b. The house cover 2d constitutes outer shells on the upper and side surfaces of the house.

  Further, a boom 4 is pivotally attached to the front center portion of the upper swing body 2 so as to be able to be raised and lowered, and an arm 5 is connected to a tip end portion of the boom 4 so as to be vertically rotatable. Further, a bucket 6 is attached to the tip of the arm 5 so as to be rotatable up and down.

  FIG. 2 is a plan view schematically showing the inside of the house of the upper swing body 2. FIG. 2 shows a state where the house cover 2d is removed.

  As shown in FIG. 2, the interior of the upper rotating body 2 is divided into an engine room 7A and an air cleaner room 7B, and a diesel engine 8 (hereinafter also simply referred to as the engine 8), a cooling fan 12, A heat exchange unit 13, a turbocharger 14, an exhaust gas treatment device 15, a battery 16 and the like are installed. Specifically, the cooling fan 12 is installed on the left side (Y1 side) of the engine 8, the turbocharger 14 is installed on the front side (X1 side) of the engine 8, and the exhaust gas processing device is installed on the right side (Y2 side) of the engine 8. 15 is installed. A heat exchanging unit 13 including a radiator 13A, an oil cooler 13B, an intercooler 13C, a fuel cooler 13D, an air conditioner condenser 13E, and the like is installed on the left side (Y1 side) of the cooling fan 12.

  An air cleaner 9, a hydraulic oil tank 18 and the like are installed in the air cleaner chamber 7B. A cab 2a and a fuel tank 19 are installed on the front side (X1 side) of the air cleaner chamber 7B, and a storage space 17 capable of storing tools and the like is installed on the front side (X1 side) of the fuel tank 19. The cab 2a is installed on the left side (Y1 side) of the boom 4, and the fuel tank 19 and the storage space 17 are installed on the right side (Y2 side) of the boom 4.

  The air cleaner 9 takes in air through the air introduction part 9a formed in the outer peripheral part. The air taken into the interior advances to the left (Y1 side) while forming a spiral flow around the cylindrical filter 9b. In this process, centrifugal force acts on dust in the air (dust etc.), so that air and dust are separated. Specifically, the dust in the spiral flow is pressed against the inner wall of the air cleaner 9, travels along the inner wall, and is collected in a vacuator valve (described later). The dust collected in the vacuator valve is discharged downward when the weight reaches a predetermined weight and the vacuator valve is opened. On the other hand, the air in the spiral flow enters the cylindrical filter 9b when it reaches the left end (Y1 side) of the cylindrical filter 9b. The air that has entered the cylindrical filter 9b is discharged through the air discharge portion 9c and supplied to the centrifugal compressor of the turbocharger 14.

  The house cover 2d has open / close covers 2d1 and 2d2 on the left side. The figure shown by hatching in FIG. 2 represents the open / close covers 2d1, 2d2 in the closed state, and the figure shown by the alternate long and short dash line represents the open / close covers 2d1, 2d2 in the open state.

  In the above configuration, the air taken in through the air cleaner 9 is compressed by the compressor of the turbocharger 14 and cooled by the intercooler 13C to reach the combustion chamber of the engine 8. Further, the exhaust gas discharged from the engine 8 is discharged into the atmosphere from the exhaust port 15A after being purified by the exhaust gas processing device 15 by rotating the turbine of the turbocharger 14. The exhaust gas processing device 15 includes a selective catalyst reduction system, a diesel particulate filter, and the like.

  A vacuator valve (described later) is attached to a dust discharge port formed in the casing of the air cleaner 9. Therefore, when there is no dust discharge structure for discharging dust (dust etc.) discharged from the vacuator valve to the outside of the upper swing body 2, the dust accumulates on the floor surface of the air cleaner chamber 7B. And it may be sucked by the cooling fan 12 and clog the radiator 13A.

  When the dust discharge structure exists, the dust is discharged outside the upper swing body 2 without accumulating on the floor surface of the air cleaner chamber 7B. However, the dust discharge structure impairs accessibility to the devices under the air cleaner 9 and may interfere with maintenance of these devices.

  Therefore, in this embodiment, as will be described in detail below, a dust discharge structure is provided that is configured so as not to impair the accessibility to the devices under the air cleaner 9.

  3 and 4 are diagrams for explaining the details of the dust discharge structure 21. FIG. 3A is a left side view of the upper swing body 2 with the open / close covers 2d1 and 2d2 open, and FIG. 3B is an upper left rear view of the upper swing body 2 with the open / close cover 2d2 open. It is the perspective view seen from. 4 is a view of a vertical plane parallel to the YZ plane including the two-dot chain line in FIG. 3 as viewed from the front (X1 side). In FIG. 4, the opening / closing cover 2d2 is in a closed state.

  The dust discharge structure 21 includes a funnel portion 21a, a first extension portion 21b, and a second extension portion 21c.

  The funnel portion 21a is a member that receives dust discharged from the vacuator valve 20, and is attached to the house frame 2c. Moreover, the funnel part 21a is arrange | positioned so that the vacuator valve | bulb 20 may be received and enclosed inside. The funnel portion 21 a may be attached to the air cleaner 9.

  The 1st extension part 21b is a member which receives the dust discharged | emitted from the funnel part 21a, and is attached to the opening / closing cover 2d2.

  The 2nd extension part 21c is a member which receives the dust discharged | emitted from the 1st extension part 21b, and is attached to the turning frame 2b. For example, the second extension portion 21c is installed so as to penetrate the turning frame 2b, and discharges dust received from the first extension portion 21b to the outside (downward) of the upper turning body 2. However, a tray for receiving dust discharged from the second extension 21c may be detachably installed below the second extension 21c.

  When the opening / closing cover 2d2 is opened, the first extension portion 21b moves away from the funnel portion 21a and the second extension portion 21c together with the opening / closing cover 2d2. Therefore, the space occupied by the first extension portion 21b between the funnel portion 21a and the second extension portion 21c is made available for maintenance work or the like. As a result, the operator can easily access the devices under the air cleaner 9 simply by opening the opening / closing cover 2d2 without performing a special operation such as removing the first extension portion 21b.

  As shown in FIG. 4, the first extension portion 21b includes a dust receiving portion 21b1 that receives dust discharged from the funnel portion 21a, and a conduit portion 21b2 that extends in the vertical direction along the inner surface of the opening / closing cover 2d2. .

  The dust receiving portion 21b1 extends obliquely upward to the right from the upper end of the conduit portion 21b2 attached to the open / close cover 2d2, and the inclination of the inner surface thereof is greater than an angle (for example, 45 degrees) that prevents clogging due to dust accumulation. Formed. Moreover, the dust receiving part 21b1 is arrange | positioned so that the clearance gap G1 may be formed between the funnel parts 21a. By this gap G1, the first extension portion 21b can prevent interference with the funnel portion 21a when the opening / closing cover 2d2 is opened / closed. However, the dust receiving part 21b1 may be arranged so that the lower opening of the funnel part 21a is received in the upper opening, that is, the gap G1 is not formed. Further, at least one of the funnel portion 21a and the dust receiving portion 21b1 may be formed of a flexible material so as to allow temporary interference (contact) when the opening / closing cover 2d2 is opened / closed.

  Further, the position of the gap G1 is arranged so as to deviate in the vertical direction from the position of the gap G2 formed between the upper end of the opening / closing cover 2d2 and the house frame 2c. In this arrangement, when the first extended portion 21b receives the dust discharged from the funnel portion 21a, the air entering the inner space from the outer space through the gap G2 connecting the outer space and the inner space of the opening / closing cover 2d2 It is possible to prevent entrainment of dust.

  The conduit portion 21b2 extends in the vertical direction along the inner surface of the opening / closing cover 2d2. This arrangement can reduce the space occupied by the conduit portion 21b2 in the air cleaner chamber 7B inside the opening / closing cover 2d2.

  Moreover, the conduit | pipe part 21b2 is arrange | positioned so that the clearance gap G3 may be formed between the 2nd extension parts 21c. By this gap G3, the first extension 21b can prevent interference with the second extension 21c when the opening / closing cover 2d2 is opened / closed.

  As shown in FIG. 4, the second extension portion 21c includes a shielding portion 21c1 protruding upward from the upper end of the turning frame 2b and a conduit portion 21c2 extending in the vertical direction so as to penetrate the turning frame 2b.

  The shielding part 21c1 is disposed so as to block air that flows through the gap G4 formed between the lower end of the opening / closing cover 2d2 and the turning frame 2b and further flows into the inner space through the gap G3. In this arrangement, when the second extension portion 21c receives the dust discharged from the first extension portion 21b, the air entering the inner space from the outer space of the opening / closing cover 2d2 through the gap G4 entrains the dust. Can be prevented.

  In addition, the inner surface of the shielding portion 21c1 has a rectangular cross section of the first extension portion 21b on the right side (Y2 side), front side (X1 side), and rear side (X2 side) with the open / close cover 2d2 closed. Are formed so as to face the three surfaces. Therefore, it does not interfere with the first extension 21b when the opening / closing cover 2d2 is opened / closed. Moreover, since it protrudes slightly upward from the upper end of the revolving frame 2b, it does not impair the accessibility to the devices under the air cleaner 9 and does not interfere with the maintenance of these devices. . In addition, the conduit | pipe part 21b2 may have other cross-sectional shapes, such as a circular cross section and an elliptical cross section. In this case, the inner surface of the shielding part 21c1 may be formed so as to conform to the cross-sectional shape of the conduit part 21b2.

  The second extension 21c may be configured such that the position of the gap G3 is shifted in the vertical direction from the position of the gap G4. Specifically, the conduit portion 21c2 may be configured to protrude upward from the upper end of the turning frame 2b so that the position of the gap G3 is higher than the lower end of the opening / closing cover 2d2. In this case, since the dust cover is prevented by the opening / closing cover 2d2, the shielding part 21c1 may be omitted.

  In this way, the dust discharge structure 21 discharges the dust discharged from the vacuator valve 20 to the outside of the upper swing body 2, so that the dust discharged from the vacuator valve 20 is prevented from being sucked into the cooling fan 12. it can.

  The first extension 21b of the dust discharge structure 21 moves together with the opening / closing cover 2d2 when the opening / closing cover 2d2 is opened. Therefore, when the opening / closing cover 2d2 is opened, the dust discharge structure 21 opens the space occupied by the first extension portion 21b as a work space, and the first extension portion 21b obstructs various work such as maintenance work. Can be prevented.

  Next, with reference to FIGS. 5-7, the shovel which concerns on another embodiment of this invention is demonstrated. FIG. 5 is a plan view schematically showing the inside of the house of the upper swing body 2 and corresponds to FIG. FIG. 5 shows a state in which the house cover 2d is removed, the hatched figure represents the closed opening / closing covers 2d1, 2d2, and the dashed line represents the opened opening / closing covers 2d1, 2d2. . 6 is a view of a vertical plane parallel to the YZ plane including the two-dot chain line in FIG. 5 as viewed from the rear (X2 side). In FIG. 6, the opening / closing cover 2d1 is omitted, and the opening / closing cover 2d2 is in a closed state. FIG. 7 is a perspective view of the upper-part turning body 2 with the opening / closing cover 2d2 opened as viewed from the upper right and rear.

  The excavator shown in FIGS. 5 to 7 mainly includes a point that the heat exchanging portion 13 is disposed on the right side of the upper swing body 2, a point that the opening / closing covers 2d1 and 2d2 are disposed on the right side surface of the shovel, and hydraulic oil. Although the tank 18 is arranged outside the air cleaner chamber 7B (behind the cab 2a) and the oil cooler 13B is arranged under the air cleaner 9, it differs from the shovel shown in FIGS. The other points are common. Therefore, description of common parts is omitted, and different parts are described in detail.

  As shown in FIGS. 6 and 7, the air cleaner 9 is installed at a position higher than the upper end of the opening / closing cover 2d2, and the vacuator valve 20 is also installed at a position higher than the upper end of the opening / closing cover 2d2. Therefore, the first extension portion 21b of the dust discharge structure 21 includes a dust receiving portion 21b1 disposed near the upper end of the opening / closing cover 2d2, and a conduit portion 21b2 extending over almost the entire height of the opening / closing cover 2d2.

  The position of the gap G1 formed between the funnel portion 21a and the dust receiving portion 21b1 is shifted in the vertical direction from the position of the gap G2 formed between the upper end of the opening / closing cover 2d2 and the house frame 2c. Be placed. This arrangement prevents air entering the inner space from the outer space of the opening / closing cover 2d2 from passing through the gap G2 when the first extension 21b receives the dust discharged from the funnel portion 21a. it can.

  In this way, the excavator dust discharge structure 21 shown in FIGS. 5 to 7 can achieve the same effect as the excavator dust discharge structure 21 shown in FIGS.

  5-7, since the air cleaner 9 is disposed at a relatively high position, a larger radiator 13A and an oil cooler 13B can be mounted compared to the shovel shown in FIGS. Further, since the hydraulic oil tank 18 is disposed outside the air cleaner chamber 7B, it is possible to prevent the hydraulic oil tank 18 from being heated by the exhaust heat of the heat exchange unit 13.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, in the above-described embodiment, the shielding portion 21c1 is configured as a part of the second extension portion 21c, but may be attached to the revolving frame 2b as an independent member different from the second extension portion 21c.

  In the above-described embodiment, the dust discharge structure 21 is fixed to the inner surface of the opening / closing cover 2d2 using a fastening member such as a bolt, but may be incorporated (integrated) in the opening / closing cover 2d2.

  In the above-described embodiment, the opening / closing cover 2d2 is a horizontally open cover using a hinge at the side edge, but a vertically open cover or a house cover using a hinge at the upper edge or the lower edge. It may be a cover removable from 2d, a sliding opening / closing cover, or the like.

  DESCRIPTION OF SYMBOLS 1 ... Lower traveling body 2 ... Upper turning body 2a ... Cab 2b ... Turning frame 2c ... House frame 2d ... House cover 2d1, 2d2 ... Opening / closing cover 3 ... Attachment DESCRIPTION OF SYMBOLS 4 ... Boom 5 ... Arm 6 ... Bucket 7A ... Engine chamber 7B ... Air cleaner chamber 8 ... Engine 9 ... Air cleaner 9a ... Air introduction part 9b ... Cylindrical filter 9c: Air discharge part 12 ... Cooling fan 13 ... Heat exchange part 13A ... Radiator 13B ... Oil cooler 13C ... Intercooler 13D ... Fuel cooler 13E ... Air conditioner condenser 14 ... Turbocharger 15 ... Exhaust gas treatment device 15A ... Exhaust port 16 ... Battery 17 ... Storage space 18 ... hydraulic oil tank 19 ... fuel tank 20 ... vacuator valve 21 ... dust discharge structure 21a ... funnel part 21b ... first extension part 21b1 ... dust receiving part 21b2 ... Conduit part 21c ... 2nd extension part 21c1 ... Shielding part 21c2 ... Conduit part G1-G4 ... Gap

Claims (5)

A lower traveling body,
An upper swivel body that is turnably mounted on the lower traveling body;
An air cleaner that is mounted inside the house formed in the upper swing body and separates air and dust;
Said mounted on the upper swing structure, the air separated by the air cleaner is supplied to the combustion chamber Rutotomoni, then the engine that will be discharged as an exhaust gas,
A structure including a conduit for vertically passing the dust discharged from the air cleaner;
An open / close cover attached to the frame of the upper swing body so as to be openable and closable,
A part of the structure including at least the conduit is attached to the opening / closing cover;
Excavator. A vacuator valve attached to the air cleaner;
The structure includes a funnel portion that receives the dust discharged from the vacuator valve.
The excavator according to claim 1. The funnel is attached to the frame;
The shovel according to claim 2. The structure includes a first extension that receives the dust discharged from the funnel,
The first extension is attached to the opening / closing cover,
The position where the first extension receives the dust discharged from the funnel is a gap formed between the outer space and the inner space of the open / close cover formed around the open / close cover when the open / close cover is closed. Is displaced from the position of
The shovel according to claim 2 or 3. The structure includes a second extension that receives the dust discharged from the first extension;
The second extension is attached to the pivot frame;
At a position where the second extension receives the dust discharged from the first extension, a shielding part is provided to block air flowing into the inner space through the gap.
The excavator according to claim 4.

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