JP2024057287A - Construction Machinery - Google Patents

Abstract

[Problem] To provide a construction machine capable of suppressing fogging and freezing of a window located to the side of the driver's seat while preventing the structure constituting the driver's cab from becoming complicated and large. [Solution] A hydraulic excavator (construction machine) 1 includes a driver's seat 40 provided in a driver's cab 13, a window 30 arranged to the side of the driver's seat 40, and an air conditioning unit 60 that blows out temperature-controlled air, and includes an insulation box (box body) 100 that is disposed between the driver's seat 40 and the window 30, diagonally rearward of the driver's seat 40, and at the height of a backrest 44 that constitutes the driver's seat 40, is connected to the air conditioning unit 60, and air that has been temperature-controlled by the air conditioning unit 60 is supplied to the inside, and is inclined toward the front of the driver's seat 40, and an air outlet 160 is formed on an inclined upper surface 100a of the insulation box 100. [Selected Figure] Figure 2

Description

The present invention relates to construction machinery, and more particularly to construction machinery that prevents fogging and freezing of windows located to the side of the driver's seat.

Conventionally, there is known a technique for supplying temperature-controlled air by an air conditioner to the windows in the cab of a construction machine such as a hydraulic excavator to remove fogging and freezing. Patent Document 1 describes an air conditioner for a construction machine that provides an air outlet for air supplied from the air conditioner to a pillar located to the rear right of the driver's seat, and blows air from the outlet along the window located to the right of the driver's seat.

JP 2010-195196 A

However, when the pillars that form the structure of the cab are used as ducts, as in the structure described in Patent Document 1, the structure may become complicated and large in size in order to connect the air conditioning unit and air outlets.

The present invention was made in consideration of these problems, and its purpose is to provide a construction machine that can prevent the structure constituting the driver's cab from becoming too complicated or large, while suppressing fogging or freezing of the windows located to the side of the driver's seat.

In order to achieve the above object, the construction machine of the present invention is a construction machine comprising a driver's seat provided in a driver's cab, a window disposed on one side of the driver's seat, and an air conditioning unit which delivers temperature-adjusted air, the construction machine comprising a box body which is disposed between the driver's seat and the window, diagonally rearward of the driver's seat, and at the height of a backrest which constitutes the driver's seat, connected to the air conditioning unit so that air which has been adjusted in temperature by the air conditioning unit is supplied therein, and which is inclined toward the front of the driver's seat;
An air outlet is formed on the inclined upper surface of the box.

The construction machine of the present invention can prevent the structure constituting the cab from becoming too complicated or too large, while suppressing fogging or freezing of the windows located to the side of the driver's seat.

FIG. 1 is a side view showing a hydraulic excavator as a construction machine according to an embodiment. FIG. FIG. 2 is a perspective view of the vicinity of the heat retention box as viewed from the upper left side. FIG. 2 is a perspective view of the structure behind the driver's seat as viewed from the upper right side. FIG. 2 is a perspective view of the vicinity of the heat retention box as viewed from the upper right side. FIG. 4 is a partial cross-sectional view showing the inside of the heat insulation box. 11 is a perspective view showing the vicinity of the heat retention box with the air outlet closed by a plurality of blades. FIG. 1 is an explanatory diagram showing the inside of a duct portion with an air outlet closed by a plurality of blades. FIG.

One embodiment of the present invention will be described below with reference to the drawings. In the following description, the vehicle front-rear direction, width direction (left-right direction), and up-down direction of the construction machine will be described with the driver on board the construction machine as the main focus.

(hydraulic excavator)
Fig. 1 is a side view showing a hydraulic excavator as a construction machine according to an embodiment. The hydraulic excavator 1 is a construction machine used for, for example, excavating earth and sand at a construction site. The hydraulic excavator 1 includes a work machine main body 10 and a work device 20 which is a working device.

(Work machine body)
The working machine body 10 includes a lower traveling body 11 and an upper rotating body 12. The lower traveling body 11 includes a crawler 11a as a drive device for traveling the hydraulic excavator 1. The crawler 11a is driven by a hydraulic motor for traveling (not shown). The upper rotating body 12 is provided on the lower traveling body 11 so as to be rotatable. The upper rotating body 12 is driven by a hydraulic motor for turning (not shown) to turn. A cab 13 in which an operator sits is provided at the front of the frame 12a of the upper rotating body 12. Machine rooms 14, 15, a counterweight 16, and the like are provided behind the cab 13 of the upper rotating body 12. The machine room 15 is equipped with an engine (not shown), a hydraulic pump (not shown) driven by the engine, and the like. The hydraulic pump (not shown) pumps hydraulic oil supplied to the hydraulic motor for traveling, the hydraulic motor for turning, and each component of the working device 20, thereby operating each hydraulic device.

(Working equipment)
The working device 20 is an articulated working device, and is attached to the front part of the frame 12a of the upper rotating body 12. The working device 20 includes a boom 21, an arm 22, a bucket 23, and a plurality of hydraulic cylinders 24, 25, and .

The boom 21 is rotatably connected to the upper rotating body 12. The arm 22 is rotatably connected to the boom 21. The bucket 23 is a hydraulic work tool for performing excavation work and the like, and is rotatably connected to the arm 22. If the bucket 23 is replaced with a hydraulic breaker or hydraulic crusher, the replaced equipment functions as the hydraulic work tool.

The hydraulic cylinder 24 is connected between the upper rotating body 12 and the boom 21, and adjusts the angle of the boom 21 by extending and retracting hydraulically. The hydraulic cylinder 25 is connected between the boom 21 and the arm 22, and adjusts the angle of the arm 22 by extending and retracting hydraulically. The hydraulic cylinder 26 is connected between the arm 22 and the bucket 23, and adjusts the angle of the bucket 23 by extending and retracting hydraulically. The hydraulic cylinders 24, 25, and 26 are supplied with hydraulic oil from a hydraulic pump (not shown) provided in the machine room 15 via a hydraulic hose (not shown).

(Driver's cab)
Next, the configuration of the cab 13 will be described with reference to Fig. 2. Fig. 2 is an explanatory diagram showing the inside of the cab. The cab 13 is a cab unit provided on the upper rotating body 12, and is a space partitioned by a floor plate 13a and a cab box 13b having walls and a ceiling rising from the floor plate 13a. A door (not shown) for the driver to board is provided on the side of the cab box 13b. In addition, windows 30 are fitted on both side surfaces of the cab box 13b in the vehicle width direction, i.e., on both sides of a driver's seat 40 described later.

In the cab 13, a driver's seat 40 is disposed, in which the driver sits. The driver's seat 40 is attached to the floor plate 13a via a seat carrier, suspension, or the like. The driver's seat 40 has a seat surface 42 on which the driver sits, and a backrest 44 that rises from the seat surface 42. The backrest 44 includes a headrest 46 attached to the upper part. In addition, various devices for operating the hydraulic excavator 1 are disposed on the floor plate 13a, such as a travel lever 51 and travel pedals 52 for traveling the lower traveling body 11, and a console 53 on which a control lever for driving the working device 20 is provided.

In addition, an air conditioner 60 (see FIG. 5) is disposed in the cab 13 to generate temperature-controlled air and supply it to the cab 13 for air conditioning such as cooling and heating. In this embodiment, the air conditioner 60 is mounted on the floor plate 13a at the bottom of the rear cover 13c disposed behind the cab 40. A plurality of ducts (not shown) are connected to the air conditioner 60, and air generated by the air conditioner 60 is supplied to the interior of the vehicle through a plurality of air outlets disposed in the cab 13 via the plurality of ducts. The plurality of air outlets include, for example, an air outlet 61 disposed in the front cover 13d disposed in the corner on the right front side of the cab 40, and an air outlet 62 disposed in the rear cover 13c.

In addition to the air outlets 61, 62, etc., in the hydraulic excavator 1 of this embodiment, an air outlet 160 for supplying air to the vicinity of the window 30 to prevent freezing or fogging of the window 30 is formed on the upper surface 100a of the heat insulation box 100 arranged in the operator's cab 13. In this embodiment, the upper surface 100a of the heat insulation box 100 refers to the lid member 120 and duct upper surface 132 described below.

The configuration of the thermal insulation box 100 and the air outlet 160 of this embodiment will be described below with reference to Figures 2 to 6. Figure 3 is a perspective view of the thermal insulation box 100 and its vicinity from the upper left side. Figure 4 is a perspective view of the structure behind the driver's seat from the upper right side. Figure 5 is a perspective view of the thermal insulation box 100 and its vicinity from the upper right side. Figure 6 is an explanatory diagram showing the inside of the thermal insulation box 100. Figure 6 shows a cross section of the thermal insulation box 100 at the midpoint in the vehicle front-rear direction.

(Thermal insulation box)
The thermal insulation box 100 is a box body for storing contents such as beverage containers while keeping them warm, and is disposed between the driver's seat 40 and the window 30 in the vehicle width direction as shown in FIG. 2. The thermal insulation box 100 is disposed on the rear side of the right console 53 and in front of the right pillar 13p, which is a structural member constituting the cab box 13b. That is, the thermal insulation box 100 is disposed diagonally to the right rear of the driver's seat 40. The thermal insulation box 100 is disposed at the height of the backrest 44 of the driver's seat 40 in the vertical direction. More specifically, the thermal insulation box 100 is disposed between the seat surface 42 and the upper end 44a of the backrest 44 (the upper end of the headrest 46) when the driver's seat 40 is in the standard position. The standard position of the driver's seat 40 is the position of the driver's seat 40 used during normal operation of the hydraulic excavator 1, in which the backrest 44 forms an angle that is approximately perpendicular to the seat surface 42. The heat retention box 100 thus arranged includes a main body 110, a cover member 120, and a duct portion 130. The cover member 120 is shown only in FIG.

(Main body)
As shown in Fig. 5, the main body 110 includes a bottom surface 111, a top surface 112, a pair of side surfaces 113 extending vertically between the bottom surface 111 and the top surface 112 with a gap between them in the vehicle width direction, and a front surface 114 and a rear surface 115 extending vertically between the bottom surface 111 and the top surface 112 with a gap between them in the vehicle front-rear direction. The main body 110 defines an internal space surrounded by the bottom surface 111, the pair of side surfaces 113, the front surface 114, and the rear surface 115. The main body 110 is connected to a rear cover 13c, as shown in Fig. 6, for example. In addition, an opening 110a is formed in the top surface 112 for inserting or removing a beverage container (not shown) into or from the inside of the main body 110.

As shown in FIG. 4, a lid member 120 is attached to the opening 110a. The lid member 120 is rotatably attached to mounting portions 116 (see FIG. 6) provided on the left side portion 113 and the top portion 112, allowing the opening 110a to be opened and closed. Thus, the lid member 120 forms part of the top portion 100a of the heat-retaining box 100 when the opening 110a is closed. The top portion 100a of the heat-retaining box 100 is inclined toward the front of the driver's seat 40. In other words, the top portion 100a extends while inclining downward as it moves from the rear to the front in the vehicle longitudinal direction.

As shown in FIG. 5, the main body 110 is disposed above the air conditioning unit 60, and the bottom surface 111 is fixed to the cab box 13b via a support bracket 105. A duct 65 extending from the air conditioning unit 60 is connected to the bottom surface 111, and air adjusted in temperature by the air conditioning unit 60 is supplied to an enclosed space (not shown) provided on the back of the rear surface 115 via the duct 65. In addition, as shown in FIG. 6, the rear surface 115 is formed with a plurality of air supply ports 140. The air adjusted in temperature by the air conditioning unit 60 is supplied from the enclosed space (not shown) to the inside of the main body 110 via the plurality of air supply ports 140. Furthermore, in this embodiment, a plurality of communication ports 150 communicating with the duct portion 130 described later are formed in the side surface 113 on the window 30 side of the main body 110.

A cup holder 180 for holding other beverage containers is provided at the front of the main body 110. The cup holder 180 is formed to extend from the front end of the main body 110 to the front end of the duct upper surface 132 of the duct section 130, which will be described later.

(Duct section)
6, the duct portion 130 is provided adjacent to the side portion 113 on the window 30 side (right side) of the main body portion 110, between the main body portion 110 and the window 30. In other words, the duct portion 130 constitutes the end portion of the thermal insulation box 100 on the window 30 side.

5 and 6, the duct section 130 defines an internal space surrounded by a duct bottom section 131, a duct top section 132 facing the duct bottom section 131, a duct side section 133 extending vertically between the duct bottom section 131 and the duct top section 132, a duct front section 134, a duct rear section 135, and a side section 113 of the main body section 110. Note that FIG. 5 omits the illustration of a part of the duct top section 132 and the duct side section 133. As described above, a plurality of communication openings 150 are formed in the side section 113 of the main body section 110, and the internal space of the duct section 130 communicates with the internal space of the main body section 110 via the plurality of communication openings 150. Additionally, the duct upper surface 132 forms part of the upper surface 100a of the thermal insulation box 100, and extends while sloping downward as it moves from the rear side to the front side in the vehicle longitudinal direction.

An air outlet 160 is formed in the duct upper surface portion 132. The air outlet 160 is formed over substantially the entire length of the duct portion 130 and extends downward toward the front side in the vehicle longitudinal direction along the inclination direction of the duct upper surface portion 132. As a result, the air outlet 160 extends along the window 30. In addition, the air outlet 160 has multiple vanes 170 provided at intervals from each other in the extension direction of the air outlet 160.

In the heat retention box 100 configured as described above, air that has been adjusted in temperature by the air conditioning device 60 and supplied to the main body 110 flows into the duct 130 via the multiple communication ports 150, and is further supplied to the vehicle interior from the air outlet 160. As a result, the air supplied from the air outlet 160 prevents the windows 30 from freezing or fogging.

(Opening and closing member)
Although specific illustration is omitted in Fig. 3 to Fig. 6, it is preferable that the plurality of vanes 170 attached to the air outlet 160 are configured as an opening/closing member capable of opening and closing the air outlet 160, as shown in Fig. 7 and Fig. 8. Fig. 7 is a perspective view showing the vicinity of the heat retention box 100 in a state where the air outlet 160 is closed by the plurality of vanes 170. Fig. 8 is an explanatory diagram showing the inside of the duct portion 130 in a state where the air outlet 160 is closed by the plurality of vanes 170. In Fig. 8, the duct side portion 133 and a rotating shaft 172 described later are omitted.

As shown in FIG. 7 by a dashed line, each vane 170 is attached so as to be rotatable about a rotation axis 172 that extends in a direction perpendicular to the extension direction of the air outlet 160, i.e., in the vehicle width direction. The rotation axis 172 is attached, for example, to the duct upper surface portion 132, or between the side surface portion 113 of the main body portion 110 and the duct side surface portion 133. This allows each vane 170 to be rotatable about the rotation axis 172 relative to the air outlet 160. As shown in FIG. 7 and FIG. 8, the multiple vanes 170 are configured to be able to close the air outlet 160 by partially overlapping each other when facing in a direction along the extension direction of the air outlet 160.

As shown in FIG. 8, each of the blades 170 has a protruding end 171 that protrudes toward the internal space of the duct section 130 when the air outlet 160 is closed. The protruding ends 171 of the blades 170 are connected to each other by a link mechanism (not shown), and when one of the blades 170 is rotated together with the rotating shaft 172, the remaining blades 170 also rotate via the link mechanism (not shown). In addition, the blade 170 located approximately in the center in the extension direction of the air outlet 160 among the multiple blades 170 has a gripping portion 174 that the driver grips when rotating each blade 170. With this configuration, if the air outlet 160 is closed by the multiple blades 170, the entire heat retention box 100 can be sealed to suppress temperature changes inside. In addition, the driver can easily open and close the air outlet 160 by simply rotating one blade 170, by rotating all the blades 170. In addition, by adjusting the rotation angle of the multiple vanes 170, the direction of air supply from the air outlet 160 can be set to the driver's desired direction. Furthermore, since the air outlet 160 and multiple vanes 170 are provided in the duct section 130, it is possible to ensure space within the duct section 130 for arranging the link mechanism (not shown) that is attached to the protruding ends 171 of the multiple vanes 170.

(Effects of the embodiment)
As described above, the hydraulic excavator 1 as a construction machine according to the embodiment is a hydraulic excavator (construction machine) 1 equipped with a driver's seat 40 provided in a driver's cab 13, a window 30 arranged to the side of the driver's seat 40, and an air conditioning unit 60 that blows out temperature-controlled air, and is characterized in that the hydraulic excavator 1 is provided with an insulated box (box body) 100 that is inclined toward the front of the driver's seat 40, is disposed diagonally rearward of the driver's seat 40 between the driver's seat 40 and the window 30, and at the height of a backrest 44 that constitutes the driver's seat 40, is connected to the air conditioning unit 60 and has air that has been temperature-controlled by the air conditioning unit 60 supplied to the inside, and is inclined toward the front of the driver's seat 40, and an air outlet 160 is formed in the inclined upper surface 100a of the insulated box 100.

With this configuration, the heat-insulating box (box body) 100 arranged between the driver's seat 40 and the window 30 can be used to supply air whose temperature has been adjusted by the air conditioner 60 to the vicinity of the window 30 from the air outlet 160 formed on the upper surface 100a of the heat-insulating box 100. As a result, in order to supply air from the air conditioner 60 to the vicinity of the window 30, it is not necessary to extend a duct from the air conditioner 60 and provide an air outlet in the structure of the driver's cab 13, such as the pillar 13p. Therefore, according to the hydraulic excavator 1 as a construction machine according to the embodiment, it is possible to prevent the structure constituting the driver's cab 13 from becoming complicated and large, while suppressing fogging and freezing of the window 30 located to the side of the driver's seat 40.

In addition, since the thermal insulation box 100 is disposed diagonally behind the driver's seat 40 and at the height of the backrest 44, the thermal insulation box 100 can eliminate fogging of the window at the driver's eye level to the side without obstructing the driver's view to the side when seated in the driver's seat. Furthermore, since the thermal insulation box 100 is disposed close to the air conditioning unit 60, the duct 65 extending between the air conditioning unit 60 and the thermal insulation box 100 can be made as short as possible, which can prevent the space in the driver's cab 13 from becoming confined or heat loss from increasing. In addition, since the upper surface 100a of the thermal insulation box 100 is inclined forward, it becomes easier to blow air from the air outlet 160 over a wide area upward and forward, and it becomes possible to supply air evenly to the window 30.

The air outlet 160 is formed at the end of the heat retention box 100 on the window 30 side so as to extend along the window 30. This configuration allows air from the air conditioning unit 60 to be efficiently supplied to the vicinity of the window 30.

The heat-retaining box 100 also has a main body 110 and a duct section 130 that is provided between the main body 110 and the window 30 and communicates with the main body 110, and the air outlet 160 is formed on the upper surface of the duct section 130. With this configuration, the air outlet 160 can be easily provided near the window 30 by the duct section 130 that is disposed in the space between the main body 110 and the window 30. In particular, when using the heat-retaining box 100 as exemplified in the embodiment, the air outlet 160 can be provided near the window 30 without changing the shape, capacity, position, etc. of the main body 110 from the existing structure.

The box in which the air outlet 160 is provided is an insulation box 100 for keeping the contents warm. With this configuration, the insulation box 100 that is conventionally placed in the cab 13 can be used to supply air from the air conditioning unit 60 to the window 30, making it possible to reduce space restrictions and an increase in the number of parts in the cab 13.

(Modification)
Although the description of the embodiment is finished above, the aspects of the present invention are not limited to this embodiment. For example, in this embodiment, the hydraulic excavator 1 is exemplified as the construction machine, but the configuration of this embodiment may be applied to any construction machine as long as it includes the operator's seat 40, the air conditioning device 60, and the operator's cab 13 in which a box to which air is supplied from the air conditioning device 60 is disposed.

In this embodiment, the air outlet 160 is formed along the window 30 at the end of the heat-insulating box 100 on the window 30 side, i.e., the duct portion 130, but the position and extension direction of the air outlet 160 are not limited to this. The air outlet 160 may be formed anywhere on the upper surface 100a of the heat-insulating box 100. For example, the air outlet 160 may be formed on the lid member 120 that constitutes part of the upper surface 100a of the heat-insulating box 100. The air outlet 160 may be formed on the upper surface 100a of the heat-insulating box 100 so as to extend in the vehicle width direction. The heat-insulating box 100 may be disposed diagonally left behind the driver's seat 40.

In addition, in this embodiment, multiple blades 170 are used as the opening/closing member for opening and closing the air outlet 160, but the configuration of the opening/closing member is not limited to this. The opening/closing member may be, for example, a cover member that covers the entire air outlet 160 and is rotatable relative to the duct portion 130, such as the cover member 120 that opens and closes the opening 110a of the heat retention box 100.

In addition, in this embodiment, the box in which the air outlet 160 is formed is an insulation box 100 for keeping beverage containers and the like warm, but the box may be any type of box as long as it is supplied with air from the air conditioning device 60.

1. Hydraulic excavator (construction machinery)
REFERENCE SIGNS LIST 10 Working machine body 13 Cab 20 Working device 30 Window 40 Cab 44 Backrest 60 Air conditioning device 61, 62, 160 Air outlet 65 Duct 100 Heat insulation box (box body)
100a Upper surface portion 110 Main body portion 110a Opening 120 Lid member 130 Duct portion 170 Plural blades (opening/closing member)

Claims (4)

A construction machine having a driver's seat provided in a driver's cab, a window disposed on one side of the driver's seat, and an air conditioning device that blows out temperature-controlled air,
a box body that is disposed between the driver's seat and the window, at a position diagonally rearward of the driver's seat, and at a height of a backrest constituting the driver's seat, the box body being connected to the air conditioning device and into which air whose temperature is adjusted by the air conditioning device is supplied, and which is inclined toward the front of the driver's seat;
A construction machine comprising: an air outlet formed on the inclined upper surface of the box body. The construction machine according to claim 1, wherein the air outlet is formed at the end of the box body facing the window so as to extend along the window. the box body has a main body portion and a duct portion provided between the main body portion and the window and communicating with the main body portion,
The construction machine according to claim 1 , wherein the air outlet is formed on an upper surface of the duct portion. The construction machine according to any one of claims 1 to 3, wherein the box is an insulation box for keeping contents contained therein warm.

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