JP2021195725A - Work machine - Google Patents

Abstract

To provide a work machine allowing installation of an air conditioner to keep the preferable space of a cab.SOLUTION: A work machine having a cab (16) for operating a machine body (1) and a building (15) covering the cab, has: a floor panel (27) forming a bottom face of the cab; a seat (21) positioned above the floor panel; an air conditioner (25) adjusting an air temperature in the cab; and inside air introducing ducts (33a, 37) introducing the air in the cab to the air conditioner. The floor panel has an aperture (27a) formed at a position corresponding to a lower part of the seat, and the air conditioner is arranged from an upper side over a lower side in a state of being inserted to the aperture. The inside air ducts has an open part (41) opened to the inside of the cab, and the open part is structured to allow installation of a filter (43).SELECTED DRAWING: Figure 2

Description

The present invention relates to a work machine and particularly relates to a technique for optimizing the arrangement of an air conditioner.

The hydraulic excavator is provided with a driver's cab on which the operator who operates the hydraulic excavator is boarded. In addition, since hydraulic excavators may work in an environment where dust is scattered, such as at a construction site, the driver's cab may be separated from the outside of the machine by a building.

Furthermore, the driver's cab is equipped with an air conditioner that regulates the internal temperature. As an example of the mounting position of this air conditioner, there are those located above the floor panel and below the seat (Patent Document 1) and those arranged behind the seat (Patent Document 2).

Japanese Unexamined Patent Publication No. 2015-229904 Japanese Unexamined Patent Publication No. 2020-050292

However, in the technique disclosed in Patent Document 1, since the air conditioner is located above the floor panel and below the seat, the height of the seat may be higher than necessary. It is not preferable that the height of the seat is higher than necessary because the space in the driver's cab is narrowed.

Further, in the technique disclosed in Patent Document 2, since it is necessary to form a space for arranging the air conditioner behind the seat, the space in the driver's cab is narrowed, and there is room for further improvement. ..

On the other hand, the portion of the air conditioner for introducing the inside air (corresponding to the inside airflow inlet 20B of Patent Document 1) is assumed to take in the inside air having less dust and the like as compared with the outside air. Therefore, the filter provided in the portion where the inside air is introduced may be deteriorated when the outside air is taken in in an environment where the outside air is easily introduced.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a work machine in which an air conditioner is arranged so as to maintain a good space in the driver's cab.

In order to achieve the above object, the work machine of the present invention includes a floor panel forming the bottom surface of the driver's cab in a work machine including a driver's cab for operating the machine and a building covering the driver's cab. The floor panel has a seat located above the floor panel, an air conditioner for adjusting the temperature of the air in the cab, and an inside air introduction duct for guiding the air in the cab to the air conditioner. Has an opening formed at a position corresponding to the lower part of the seat, and the air conditioner is arranged over the upper side and the lower side of the floor panel in a state of being inserted through the opening, and the inside air introduction duct is provided. Is characterized in that an open portion that opens into the cab is formed, and the open portion is configured to be provided with a filter.

As a result, the cab is narrowed by disposing the air conditioner inserted in the opening formed at the position corresponding to the lower part of the seat of the floor panel over the upper side and the lower side of the floor panel. It is possible to suppress this.

As another aspect, the building is formed with a boarding gate for an operator to board in at least one of the left and right directions of the aircraft, and the opening portion is opened toward the rear when viewed in the front-rear direction of the aircraft. It is preferably formed.

As a result, the boarding gate for the operator to board is formed in at least one of the left and right directions of the aircraft in the building, while the open portion is provided in the inside air introduction duct so as to open toward the rear when viewed in the front-rear direction of the aircraft. By being formed, it is possible to suppress the introduction of outside air by the open portion when the operator gets on the driver's cab.

As another aspect, the open portion is formed with a guide extending in the vertical direction of the machine body along the side portion of the filter, and the guide is a first wall portion that supports the side portion of the filter. The filter includes a second wall portion that supports the back surface of the filter and a third wall portion that supports the front surface of the filter, and the filter includes the first wall portion, the second wall portion, and the third wall portion. It is preferable that the parts support the machine in the front-rear direction and the left-right direction.
As a result, a guide extending in the vertical direction of the machine body is formed in the open portion of the inside air introduction duct along the side portion of the filter, and the filter is attached to the open portion from above the open portion along the guide. The filter can be easily attached from above the opening.

As another aspect, it is preferable that a locking portion for locking to the locked portion provided in the open portion of the inside air introduction duct is formed at the upper end of the filter.
As a result, by forming a locking portion that locks to the locked portion provided in the open portion of the inside air introduction duct at the upper end of the filter, the work can be performed from above the filter when attaching or detaching the filter. , It is possible to improve maintainability.

According to the work machine of the present invention, the air conditioner is arranged so as to extend in the vertical direction in the opening formed at the position corresponding to the lower part of the seat of the floor panel, thereby suppressing the narrowing of the driver's cab. Can be done. As a result, the air conditioner can be arranged so that the space in the driver's cab can be kept good.

It is a side view of the hydraulic excavator which is a typical example of the work machine which concerns on this invention. It is a side view around the seat installed in the driver's cab. It is a top view of the air conditioner in the driver's cab. It is a rear perspective view of the inside air introduction duct. It is explanatory drawing explaining the mode of attaching the filter to the open part of the filter case seen from the left side in the left-right direction of the machine body. It is explanatory drawing explaining the mode of attaching the filter to the open part of the filter case seen from the left side in the left-right direction of the machine body. It is explanatory drawing explaining the mode of attaching the filter to the open part of the filter case seen from the left side in the left-right direction of the machine body. It is explanatory drawing explaining the mode of attaching the filter to the open part of the filter case seen from the left side in the left-right direction of the machine body.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
With reference to FIG. 1, a side view of the hydraulic excavator 1, which is a typical example of the work machine according to the present invention, is shown.

As shown in FIG. 1, the hydraulic excavator 1 is a so-called small swivel machine including, for example, a traveling body 3 and a swivel body 5. When the hydraulic excavator 1 is viewed from above, the hydraulic excavator 1 swivels within a range surrounded by the front end, the rear end, and both outer ends of the pair of left and right endless running crawler belts 3a regardless of the turning angle of the swivel body 5. It is a model (so-called small swivel machine) that can accommodate the body 5. The traveling body 3 includes a pair of left and right endless running tracks 3a, each of which extends in the front-rear direction. The traveling body 3 travels by driving a hydraulic motor by a driving force of an engine (not shown) to drive the endless running crawler belt 3a. Although the crawler type hydraulic excavator 1 is shown in FIG. 1, it may be a wheeled type.

The swivel body 5 has a front working machine 13 and a building 15, and is supported on the traveling body 3 so as to be swivelable via a swivel frame 11. The swivel body 5 swivels by driving a swivel motor by an engine (not shown).

The front working machine 13 has a boom 13a that is supported up and down by the swivel body 5, an arm 13b that is swingably supported by the tip of the boom 13a, and a bucket 13c that is swingably supported by the tip of the arm 13b. It will be. The front working machine 13 operates by supplying hydraulic oil from a hydraulic pump (not shown) to the boom cylinder 13d, the arm cylinder 13e, and the bucket cylinder 13f.

The building 15 has an internal space (driver's cab 16) on which an operator who operates a hydraulic excavator 1 is boarded. In other words, the machine body 1 includes a driver's cab 16 and a building 15 that covers the driver's cab 16. A boarding gate 17 for an operator to board is formed on the left side of the building 15 in the left-right direction of the aircraft, and can be opened and closed by a door 18. In the driver's cab 16, the traveling body 3 is driven, the turning body 5 is turned, the operation of the operator is received in order to operate the front working machine 13, and the signal corresponding to the accepted operation is output to the controller (not shown). Operating devices (steering, pedals, levers, switches, etc.) are arranged. That is, the operator boarding the driver's cab 16 can operate the hydraulic excavator 1 by operating the operating device.

Referring to FIG. 2, a side view of the periphery of the seat 21 installed in the driver's cab 16 is shown. In the driver's cab 16, a seat (seat) 21, a support unit 23, and an air conditioner 25 are arranged on a floor panel 27 forming a floor surface of the driver's cab 16.

The seat 21 is a seat arranged so that the operator can sit facing forward. The sheet 21 is supported on the upper side of the floor panel 27 by the support unit 23. The support unit 23 has a carrier 23a and a suspension 23b. Therefore, the support unit 23 can move the seat 21 in the front-rear direction by the carrier 23a to support it at an arbitrary position of the operator, and can reduce the transmission of the vibration in the vertical direction of the machine body to the seat 21 by the suspension 23b.

Referring to FIG. 3, an upper view of the air conditioner 25 in the driver's cab 16 is shown. The air conditioner 25 is a device for adjusting the temperature of the air in the cab 16, and is arranged inside the opening 27a formed in the floor panel 27 when viewed from the vertical direction of the machine body, and is arranged above and below the floor panel 27. It is extended to (see Fig. 2). In other words, the air conditioner 25 is arranged over the upper side and the lower side of the floor panel 27 in a state of being inserted through the opening 27a. The air conditioner 25 has an operating device 31, an introduction switching device 33, an outside air introduction duct member 35, and a filter case (inside air introduction duct) 37.

The operating device 31 is a device that operates by utilizing the driving force of an engine (not shown), adjusts the temperature of the air introduced from the introduction switching device 33, and supplies the air into the cab 16. The introduction switching device 33 is a device capable of allowing air to flow with either the outside air introduction duct member 35 or the filter case 37 by switching a switching valve (not shown). That is, the introduction switching device 33 can selectively introduce the outside air and the inside air. The introduction switching device 33 is formed with an inside air introduction duct portion (inside air introduction duct) 33a extending toward the center of the machine body 1 when viewed in the left-right direction of the machine body at the rear portion when viewed in the front-rear direction of the machine body.

Specifically, the inside air introduction duct portion 33a is a duct portion formed in the introduction switching device 33 extending from the rear end of the case toward the center of the machine body 1 when viewed in the left-right direction of the machine body. The inside air introduction duct portion 33a is formed so that air can flow between the rear end of the case in the introduction switching device 33 and the inside of the cab 16, in other words, the air in the cab 16 is guided to the air conditioner 25. It is formed in. Further, the inside air introduction duct portion 33a has an end portion on the center side of the machine body 1 opened above the floor panel 27 when viewed in the left-right direction of the machine body. Therefore, the introduction switching device 33 can positively introduce the air located above the floor panel 27 among the air (inside air) in the cab 16 through the inside air introduction duct portion 33a.

Referring to FIG. 4, a rear perspective view of the filter case 37 is shown. A filter case 37 is arranged at the end of the inside air introduction duct portion 33a. The filter case 37 is a resin case that extends upward and rearward from the end of the inside air introduction duct portion 33a, is above the floor panel 27, and is open to the rear in the cab 16. The filter case 37 is provided with a filter 43, which will be described later. The outside air introduction duct member 35 is a duct member that extends rearward from the left side portion of the operating device 31 and opens to the left rear side in the building 15 so that the outside air (outside air) of the hydraulic excavator 1 can be introduced.

As a result, the air conditioner 25 controls the introduction switching device 33 at the operator's discretion to supply air to the operating device 31 from either the outside air introduction duct member 35 or the inside air introduction duct portion 33a to adjust the temperature. It can be supplied into the cab 16. Further, the air conditioner 25 is arranged in the opening 27a formed in the floor panel 27 when viewed from the vertical direction of the machine body, and extends above and below the floor panel 27 to be above the floor panel 27. The air conditioner 25 can be extended below the floor panel 27 as compared with the case where the air conditioner 25 is located. Therefore, the positions of the seat 21 and the support unit 23 in the vertical direction of the machine body can be positioned relatively downward. In other words, by extending the air conditioner 25 below the floor panel 27, it is possible to provide a wide space in the driver's cab 16 that can be effectively utilized.

Here, the filter 43 is provided in the open portion 41 that introduces the inside air from the rear end of the filter case 37. The filter 43 is a member capable of allowing air to pass through while adsorbing dust and the like in the air, and has a built-in non-woven fabric. Therefore, the filter case 37 can purify the air introduced from the open portion 41 by the filter 43 and supply it to the introduction switching device 33 and the operating device 31.

On the other hand, since the filter 43 adsorbs dust and the like in the air, the dust and the like are accumulated in the non-woven fabric when passing through the air (deterioration of the filter 43). Here, as described above, the opening portion 41 of the filter case 37 is such that the filter case 37 is on the upper side of the floor panel 27 and is open to the rear side in the cab 16. Therefore, since the filter case 37 takes in the air in the cab 16 which has less dust and the like as compared with the outside air, it is possible to suppress the deterioration of the filter 43.

Further, the open portion 41 of the filter case 37 faces rearward when viewed in the front-rear direction of the driver's cab 16, in other words, faces perpendicular to the inlet connecting the driver's cab 16 and the outside of the hydraulic excavator 1. ing. Therefore, the filter case 37 can reduce the intake of outside air and suppress the deterioration of the filter 43.

Here, the open portion 41 of the filter case 37 is formed with a lower end support portion 51, left and right end guide portions (guides) 53, left and right wall portions 55, and locked portions 57. The lower end support portion 51 is a support portion that projects rearward from the lower end of the filter case 37 in the front-rear direction of the machine body and supports the lower end of the filter 43 when the filter 43 is attached to the open portion 41.

The left and right end guide portions 53 are a pair of left and right support portions that support the side portions of the filter 43 when the filter 43 is attached to the open portion 41. Specifically, the left and right end guide portions 53 are U-shaped when viewed in cross section, and the lower ends are formed to have a width equivalent to the thickness of the filter 43, and the width is formed so as to increase upward. ing.

More specifically, the left and right end guide portions 53 are a side wall portion (first wall portion) 53a and a vertical flat plate portion (second wall portion) that is a part of a frame extending outward from the peripheral edge of the open portion 41. ) 53b, and an inclined flat plate portion (third wall portion) 53c that inclines and extends rearward toward the upper side. Therefore, the left and right end guide portions 53 support the side portion 43d of the filter 43 by the side wall portion 53a, and support the front surface (surface) 43f (see FIG. 5 described later) of the filter 43 by the vertical flat plate portion 53b, and the inclined flat plate portion. The rear surface (back surface) 43e of the filter 43 can be supported by the 53c.

The left and right wall portions 55 are a pair of left and right flat plate portions formed above the left and right end guide portions 53 and extending rearward from the left and right end portions of the open portion 41. The left and right wall portions 55 are located outside the side portion of the filter 43 when the filter 43 is attached to the open portion 41 when viewed in the left-right direction of the machine body. The locked portion 57 is a hole having a peripheral edge on which the locking portion 43a formed at the upper end of the filter 43 can be locked when the filter 43 is attached to the opening portion 41. Here, the locking portion 43a of the filter 43 is pressed toward the locked portion 57 to be in the locked state, and the knob 43b is pressed toward the locking portion 43a to release the locked state. be able to.

With reference to FIGS. 5 to 8, explanatory views illustrating an embodiment in which the filter 43 is attached to the open portion 41 of the filter case 37 as viewed from the left side in the left-right direction of the machine body are shown. Hereinafter, the operation and effect of the filter case 37 when the filter 43 is attached to the open portion 41 of the filter case 37 will be described with reference to FIGS. 5 to 8.

The filter 43 is attached so as to move downward from above the open portion 41 of the filter case 37. Specifically, first, an operator such as an operator positions the filter 43 inside the left and right wall portions 55 in the left-right direction, and moves the filter 43 downward so that the front surface 43f slides on the upper end of the filter case 37 (FIG. 5). .. Next, the operator moves the filter 43 downward so that the lower end 43c of the filter 43 is located inside the upper end of the left and right end guide portions 53, that is, inside the vertical flat plate portion 53b and the inclined flat plate portion 53c in the front-rear direction. FIG. 6). At this time, as shown in FIG. 6, even when the front surface 43f of the filter 43 is separated from the upper end of the filter case 37, the filter 43 is moved downward so as to be located inside the left and right wall portions 55 in the left-right direction. Is preferable.

Next, the operator moves the filter 43 downward so that the lower end 43c passes through the inside of the left and right end guide portions 53, and brings the filter 43 into contact with the lower ends of the left and right end guide portions 53 (FIG. 7). Then, the operator swings the filter 43 so as to move the locking portion 43a at the upper end forward with the lower end 43c as the axis, and locks the filter 43 with the locked portion 57 (FIG. 8).

By the way, in the above series of operations, since the viewpoint is located above the open portion 41 of the filter case 37, the open portion 41 of the filter case 37 is hidden by the filter 43, which makes it difficult for the operator to visually recognize the open portion 41. .. Therefore, by forming the lower end support portion 51, the left and right end guide portions 53, and the left and right wall portions 55 in the open portion 41 of the filter case 37, the operator can easily do so without visually recognizing the open portion 41 of the filter case 37. The filter 43 can be attached.

Next, a mode of removing the filter 43 from the open portion 41 of the filter case 37 will be described. First, the operator moves the locking portion 43a backward while releasing the locked state of the locking portion 43a locked to the locked portion 57 by pressing the knob 43b toward the locking portion 43a. The filter 43 is swung so as to (see FIGS. 8 and 7 in this order). After that, the operator pulls out the filter 43 upward (see FIGS. 6 and 5 in this order). As a result, the operator can remove the filter 43 without visually recognizing the open portion 41 of the filter case 37.

Therefore, the lower end support portion 51, the left and right end guide portions 53, the left and right wall portions 55, and the locked portion 57 are formed in the open portion 41 of the filter case 37, and the locking portion 43a is formed at the upper end of the filter 43. The operator can replace the filter 43 without visually recognizing the open portion 41 of the filter case 37. Therefore, the driver's cab 16 can be formed without securing a space in the driver's cab 16 for the operator to visually recognize the open portion 41 of the filter case 37, and the building 15 can be miniaturized.

As described above, in the work machine according to the present invention, the floor panel forming the bottom surface of the building in the work machine including the driver's cab 16 for operating the hydraulic excavator 1 and the building 15 for covering the driver's cab 16. 27, a seat 21 above the floor panel 27, an air conditioner 25 for adjusting the temperature of air in the building, and an inside air introduction duct portion 33a for guiding the air in the cab 16 to the air conditioner 25. An opening 27a is formed in the floor panel 27 at a position corresponding to the lower part of the seat 21, and the air conditioner 25 is arranged over the upper side and the lower side of the floor panel 27 in a state of being inserted through the opening 27a. The inside air introduction duct portion 33a is formed with an opening portion 41 that opens into the driver's cab 16, and the opening portion 41 is configured to be provided with a filter 43.

Therefore, by disposing the air conditioner 25 inside the opening 27a formed at a position corresponding to the lower side of the seat 21 of the floor panel 27 over the upper side and the lower side of the floor panel 27, the cab 16 is formed. It is possible to suppress narrowing. Further, since the opening portion 41 is located above the floor panel 27, maintainability can be improved.

Further, since the opening portion 41 is located above the floor panel 27, it is possible to suppress the introduction of air outside the hydraulic excavator 1 by the opening portion 41 and reduce the deterioration of the filter 43.

The building 15 is formed with a boarding gate 17 on which an operator is boarded in at least one of the left and right directions of the aircraft, and the opening portion 41 is formed so as to open toward the rear when viewed in the front-rear direction of the aircraft. Therefore, when the operator gets on the driver's cab 16, the opening 41 can suppress the introduction of air outside the hydraulic excavator 1 and the deterioration of the filter 43 can be reduced.

The open portion 41 is formed with left and right end guide portions 53 extending in the vertical direction of the machine body along the side portions of the filter 43, and the left and right end guide portions 53 support the side portions 43d of the filter 43. The filter 43 includes a side wall portion 53a, a vertical flat plate portion 53b that supports the rear surface 43e of the filter 43, and an inclined flat plate portion 53c that supports the front surface 43f of the filter 43. Since the flat plate portion 53c is supported in the front-rear direction and the left-right direction of the machine body, the filter 43 can be easily attached from above the open portion 41.

Then, since a locking portion 43a that locks to the locked portion 57 provided in the opening portion 41 of the filter case 37 is formed at the upper end of the filter 43, work is performed from above the filter 43 when attaching and detaching the filter 43. Can be performed and maintainability can be improved.

The description of the working machine according to the present invention is completed above, but the present invention is not limited to the above embodiment and can be changed without departing from the gist of the present invention.
For example, in the present embodiment, the hydraulic excavator 1 has been described as a specific example of the work machine, but a work machine such as a dump truck, a motor grader, or a wheel loader may be used.
Further, in the present embodiment, the filter case 37 is provided at the end of the inside air introduction duct portion 33a, and the filter 43 is attached to the open portion 41 of the filter case 37. May be formed integrally.

1 Hydraulic excavator (airframe)
15 Building 16 Driver's cab 17 Boarding gate 21 Seats
25 Air conditioner 27 Floor panel 27a Opening 33a Inside air introduction duct part (inside air introduction duct)
37 Filter case (inside air introduction duct)
41 Open part 43 Filter 43a Locking part 43d Side part 43e Rear surface (back surface)
43f front (front)
53 Left and right end guides (guides)
53a Side wall (first wall)
53b Vertical flat plate part (second wall part)
53c Inclined flat plate part (third wall part)
57 Locked part

Claims (4)

The driver's cab that operates the aircraft and
In a work machine equipped with a building covering the driver's cab,
The floor panel forming the bottom surface of the driver's cab and
The seat located above the floor panel and
The air conditioner that adjusts the temperature of the air in the cab and
It has an inside air introduction duct that guides the air in the cab to the air conditioner.
An opening is formed in the floor panel at a position corresponding to the lower part of the seat.
The air conditioner is arranged over the upper side and the lower side of the floor panel in a state of being inserted through the opening.
The inside air introduction duct is formed with an open portion that opens into the cab.
A work machine characterized in that a filter is provided in the open portion. The building has a boarding gate for operators to board in at least one of the left and right directions of the aircraft.
The open portion is formed so as to open toward the rear when viewed in the front-rear direction of the airframe.
The work machine according to claim 1, wherein the work machine is characterized by the above. A guide extending in the vertical direction of the machine body is formed in the open portion along the side portion of the filter.
The guide
The first wall portion that supports the side portion of the filter and
The second wall portion that supports the back surface of the filter and
Includes a third wall portion that supports the surface of the filter.
The filter is supported by the first wall portion, the second wall portion, and the third wall portion in the front-rear direction and the left-right direction of the machine body.
The work machine according to claim 1, wherein the work machine is characterized by the above. A locking portion that locks to a locked portion provided in the open portion of the inside air introduction duct is formed at the upper end of the filter.
The work machine according to claim 3, wherein the work machine is characterized in that.

Images