Working machinery

Abstract

To provide a work machine which easily achieves appropriate layout of a heating device.SOLUTION: A work machine 3 includes a travel part, a turning part 32, a boarding chamber 4, and a heating device 1. The turning part 32 is arranged above the travel part, and is turnable to the travel part in plan view. The boarding chamber 4 is positioned on the turning part 32, and has a boarding seat 41. The heating device 1 sends heat into the boarding chamber 4 from a heat output part 10 arranged at a position facing the boarding chamber 4, and thereby heats the boarding chamber 4. The heat output part 10 of the heating device 1 is arranged in front of a foot position Pf1 of the boarding seat 41.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a work machine including a heating device for heating a cab.

Background Art

[0002] As a related art, a work vehicle (excavation work vehicle) including a heating device (heater device) in a cab (driver's cab) is known (see, for example, Patent Document 1). In the work machine according to the related art, the heating device includes a main body unit (heater device main body unit) installed on the floor of the cab and a cover body attached to the main body unit to cover the main body unit. The cover body has a heat output part (air outlet) that blows out the warm air sent out from the air outlet part of the main body unit.

[0003] In the related art, the heating device is arranged at a position on the right side in the left - right direction, which is opposite to the boarding - alighting port side (left side) on the floor. That is, the heating device is arranged at a position in front of and below the right side of the driver's seat, which is to the right of the feet of the operator sitting on the driver's seat.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the configuration of the above - mentioned related art, the heat (warm air) from the heating device arranged on the side (right side) of the foot position of the driver's seat intensively heats one leg (right leg) of the passenger (operator) sitting on the driver's seat, and it is difficult to evenly warm both legs. Further, in a work machine such as an ultra - small turning type or a rear ultra - small turning type, there is not much room in the left - right dimension of the cab, and there is a possibility that the heating device cannot be installed in the first place.

[0006] The objective of the present invention is to provide a work machine that facilitates the proper layout of heating equipment. [Means for solving the problem]

[0007] A working machine according to one aspect of the present invention comprises a traveling section, a rotating section, a passenger compartment, and a heating device. The rotating section is positioned above the traveling section and is rotatable relative to the traveling section in a plan view. The passenger compartment is located on the rotating section and has a passenger seat. The heating device heats the passenger compartment by sending heat into the passenger compartment from a heat output section positioned facing the passenger compartment. The heat output section of the heating device is positioned in front of the passenger seat's footwell. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a work machine that facilitates the proper layout of a heating system. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a schematic perspective view from the left front showing the work machine according to Embodiment 1. [Figure 2] Figure 2 is a schematic left side view of the work machine according to Embodiment 1. [Figure 3] Figure 3 is a schematic front view of the work machine according to Embodiment 1. [Figure 4] Figure 4 shows the main parts of the work machine according to Embodiment 1, and is a schematic perspective view that enlarges the area Z1 in Figure 1. [Figure 5] Figure 5 shows the main parts of the work machine according to Embodiment 1, and is a schematic left side view enlarged from area Z1 in Figure 2, and a schematic front view enlarged from area Z1 in Figure 3. [Figure 6] Figure 6 shows the main parts of the work machine according to Embodiment 1, and is a schematic perspective view taken from the left rear. [Figure 7] Figure 7 shows the main parts of the work machine according to Embodiment 1, and is a schematic exploded perspective view taken from the left rear. [Figure 8]Figure 8 is a schematic plan view of the work machine according to Embodiment 1. [Figure 9] Figure 9 is a schematic perspective view from the left front showing the work machine according to Embodiment 2. [Modes for carrying out the invention]

[0010] The embodiments of the present invention will be described below with reference to the attached drawings. The following embodiments are examples that embody the present invention and are not intended to limit the technical scope of the present invention.

[0011] (Embodiment 1) [1] Overall structure As shown in Figures 1 to 3, the work machine 3 according to this embodiment comprises a travel unit 31, a swivel unit 32, and a work machine 33. The work machine 3 also includes a passenger cabin 4 in which a person can ride. The passenger cabin 4 includes a passenger seat 41 in which the passenger sits. In this embodiment, the travel unit 31, the swivel unit 32, the work machine 33, and the passenger cabin 4 are included in the body 30 of the work machine 3.

[0012] Furthermore, the work machine 3 according to this embodiment is further equipped with a heating device 1. The heating device 1 heats the passenger compartment 4 by sending heat into the passenger compartment 4 from a heat output unit 10 (see Figure 5) located facing the passenger compartment 4. Here, the heating device 1 is mounted on the body 30 of the work machine 3. With such a heating device 1, it is possible to maintain a comfortable environment for the passenger (operator) inside the passenger compartment 4, especially during work in winter.

[0013] As used in this disclosure, the "heating device" is a device that heats a space to be heated by sending heat from the heat output unit 10 to the space to be heated. Here, the heating device 1 is not limited to a configuration that raises the temperature of the space to be heated, and may be configured to directly heat an object (including structural materials such as walls and people) existing in the space to be heated by radiating heat to the object. This type of heating device 1 includes a warm air type that raises the temperature of the space to be heated by sending warm air (hot air) into the space to be heated, and a radiation type that radiates heat rays (such as infrared rays) into the space to be heated, such as an oil heater. In the warm air type heating device 1, hot air is blown out from the heat output unit 10, and warm air is sent into the space to be heated, thereby sending "heat" (the heat of the warm air) into the space to be heated. In the radiation type heating device 1, "heat" (radiant heat) is sent into the space to be heated by radiating heat rays (such as infrared rays) from the heat output unit 10.

[0014] In this embodiment, as an example, a case where the heating device 1 is a warm air type heating device that sends warm air, which is at a higher temperature than the outside air temperature (outside air temperature) of the passenger compartment 4 as the space to be heated, into the passenger compartment 4 will be described. Specifically, the heating device 1 is a fan heater having a fan and a heater disposed on the air flow generated by the fan. This heating device 1 sends heat (the heat of the warm air) into the passenger compartment 4 by blowing out the air (warm air) heated by the heater from the air outlet as the heat output unit 10 by the fan.

[0015] The space to be heated may be a "closed space" surrounded by a floor surface, a wall surface, a ceiling surface, etc., or may be an "open space" with at least one direction open. In this embodiment, the passenger compartment 4 as the space to be heated is an "open space" with the sides other than the floor surface and the ceiling surface open. Therefore, the heating device 1 warms the objects (including structural materials such as walls and people) existing in the space to be heated rather than raising the temperature of the space to be heated (the passenger compartment 4).

[0016] In addition, the work machine 3 further includes a display device 34, an operation device 35, a control device, and various sensors (including a sonar and a camera, etc.).

[0017] As used in this disclosure, the "working machine" refers to various working machines. As an example, it is a working vehicle such as a backhoe (including hydraulic excavators, mini excavators, etc.), a wheel loader, and a carrier. The working machine 3 includes a working device 33 configured to be capable of executing one or more operations. The working machine 3 is not limited to a "vehicle", and may be, for example, a working flying object such as a working ship, a drone, or a multicopter. Furthermore, the working machine 3 is not limited to a construction machine, and may be, for example, an agricultural machine (agricultural implement) such as a rice transplanter, a tractor, or a combine. In the present embodiment, unless otherwise specified, the working machine 3 is a ride-on type backhoe, and the case where it can execute operations such as excavation work, leveling work, trench excavation work, or loading work will be described as an example. More specifically, it is assumed that the working machine 3 according to the present embodiment is a "super-small turning type" in which the turning part 32 including the working device 33 can turn completely within 120% of the full width of the traveling part 31 (the full width of the pair of left and right crawlers 311), or a "rear super-small turning type" in which the rear end turning radius ratio is within 120%.

[0018] Also, in the present embodiment, as an example, the passenger boarding the cab 4 is an operator, and the working machine 3 operates by the operation of the passenger. However, the passenger is not limited to an operator. For example, when the working machine 3 operates by remote control or automatic driving, the passenger may be a person boarding the working machine 3 for the purpose of monitoring or inspection (maintenance). Furthermore, the cab 4 may be capable of accommodating a plurality of passengers simultaneously. In this case, a plurality of passenger seats 41 may be provided in one cab 4.

[0019] In this embodiment, for the sake of explanation, the vertical direction when the work machine 3 is in a usable state is defined as the up-down direction D1. Furthermore, the forward-backward direction D2 and the left-right direction D3 are defined based on the direction as seen from the perspective of the occupant (operator) seated in the cabin 4 of the work machine 3. In other words, each direction used in this embodiment is defined based on the cabin 4 of the work machine 3, with the direction in which the machine body 30 moves when the work machine 3 moves forward being "forward," and the direction in which the machine body 30 moves when the work machine 3 moves backward being "rear." Similarly, the direction in which the front end of the machine body 30 moves when the work machine 3 turns right is "to the right," and the direction in which the front end of the machine body 30 moves when the work machine 3 turns left is "to the left." Since the passenger compartment 4 is located in the rotating section 32, the longitudinal direction D2 and lateral direction D3 relative to the travel section 31 change as the rotating section 32 rotates. In the following, the directions are defined with the front of the passenger compartment 4 facing the direction of travel of the travel section 31, as shown in Figure 1. However, these directions are not intended to limit the direction of use (direction during use) of the work machine 3.

[0020] The work machine 3 is equipped with an engine that serves as a power source. In this embodiment, for example, the engine is a diesel engine. The engine is driven by fuel (in this case, diesel fuel) supplied from a fuel tank. In the work machine 3, for example, the engine drives a hydraulic pump, and the hydraulic pump supplies hydraulic fluid to hydraulic actuators (including hydraulic motors 61 and hydraulic cylinders 62, etc.) in various parts of the machine body 30, thereby driving the machine body 30. Such a work machine 3 is controlled, for example, by a user (operator) who is seated in the passenger compartment 4 of the machine body 30 and operates the operating levers 351, etc., of the operating device 35.

[0021] In this embodiment, as described above, it is assumed that the work machine 3 is a ride-on type backhoe, so the work machine 33 is driven according to the operation of the occupant (operator) who is seated in the passenger cabin 4, and performs work such as excavation. The work machine 33 is supported by the slewing section 32 which is equipped with the passenger cabin 4. Therefore, when the slewing section 32 rotates, the work machine 33 rotates together with the passenger cabin 4.

[0022] Here, the passenger compartment 4 of the aircraft 30 is equipped with a display device 34 and an operating device 35, etc., and the passenger can operate the operating device 35 while viewing various information related to the work machine 3 displayed on the display device 34. For example, the display screen of the display device 34 displays information related to the operating status of the work machine 3, such as the cooling water temperature and the hydraulic oil temperature, so that the passenger can check the information related to the operating status of the work machine 3 necessary for operating the operating device 35 on the display device 34.

[0023] The running unit 31 has a running function and is configured to be able to travel on the ground (including turning). The running unit 31 has, for example, a pair of left and right crawlers 311 and a blade 312. The running unit 31 further has a hydraulic motor 61 (hydraulic actuator) for driving the crawlers 311.

[0024] The slewing section 32 is positioned above the traveling section 31 and is rotatable relative to the traveling section 31 in a plan view. In other words, the slewing section 32 is located above the traveling section 31 and is configured to rotate around a rotation axis aligned vertically with respect to the traveling section 31. The slewing section 32 has a hydraulic motor and the like as a hydraulic actuator for slewing. The slewing section 32 is equipped with the passenger compartment 4, as well as an engine and a hydraulic pump. Furthermore, the slewing section 32 is provided with a boom bracket that serves as a pivot point 321 (see Figure 2) to which the work equipment 33 is attached.

[0025] In this embodiment, the swivel section 32 has a substantially circular shape with a flat cutout at its front end in a plan view. The swivel section 32 is rotatable around the center of this circular shape as its axis of rotation. In other words, the swivel section 32 as a whole has a cylindrical (disk) shape, and most of its outer circumferential surface is a curved surface that is convex outward, while its front surface 323 is formed in a planar shape perpendicular to the front-rear direction D2.

[0026] Here, a retractable bonnet 322 is provided at the right end of the upper surface of the swivel section 32. When the bonnet 322 is open, maintenance (such as refueling) of the fuel tank, hydraulic oil tank, and coolant tank can be performed through the inspection opening that is closed by the bonnet 322. In this embodiment, the bonnet 322 opens and closes by rotating with its rear end as the pivot point.

[0027] The work implement 33 is supported by the slewing section 32 and is configured to perform one or more operations. The work implement 33 is supported by the pivot point 321 (boom bracket) of the slewing section 32 and performs operations. The work implement 33 has a bucket 331. The bucket 331 is a type of attachment (work tool) that is attached to the body 30 of the work machine 3, and consists of any tool selected from a plurality of types of attachments according to the content of the work. For example, the bucket 331 is detachably attached to the body 30 and is replaced according to the content of the work. Examples of (end) attachments for the work machine 3 include, in addition to the bucket 331, various tools such as breakers, augers, crushers, forks, fork claws, steel frame cutters, asphalt milling machines, brush cutters, rippers, mulchers, tilt rotators, and tampers.

[0028] The work machine 33 further includes a boom 332, an arm 333, and a hydraulic actuator (including a hydraulic cylinder 62 and a hydraulic motor, etc.). The bucket 331 is attached to the end of the arm 333. The bucket 331 is supported on the arm 333 so as to be rotatable about a rotation axis along the horizontal direction.

[0029] The boom 332 is rotatably supported at the pivot point 321 of the slewing section 32. Specifically, the boom 332 is rotatably supported at the pivot point 321 around a rotation axis along the horizontal direction. The boom 332 has a shape that extends upward from its base end, which is supported at the pivot point 321. The arm 333 is connected to the tip of the boom 332. The arm 333 is rotatably supported relative to the boom 332 around a rotation axis along the horizontal direction.

[0030] The work implement 33 operates by receiving power from the engine, which serves as its power source. Specifically, the engine drives a hydraulic pump, and hydraulic fluid is supplied from the hydraulic pump to the hydraulic actuators (hydraulic cylinders 62, etc.) of the work implement 33, thereby operating the various parts of the work implement 33 (bucket 331, boom 332, and arm 333).

[0031] In this embodiment, the work machine 33 has a multi-joint structure in which the boom 332 and arm 333 are configured to rotate independently. That is, by each of the boom 332 and arm 333 rotating around a rotation axis along the horizontal direction, the multi-joint work machine 33 including the boom 332 and arm 333 can be extended and folded as a whole. Furthermore, the bucket 331 as an attachment is supported by the machine body 30 (swivel section 32) via the boom 332 and arm 333, and the bucket 331 can be opened and closed by rotating the bucket 331 itself relative to the arm 333.

[0032] The traveling section 31 and the slewing section 32, like the work implement 33, operate by receiving power from the engine as a power source. In other words, the slewing section 32 and the traveling section 31 operate when hydraulic fluid is supplied from a hydraulic pump to the hydraulic motor 61 of the traveling section 31 and the hydraulic motor of the slewing section 32, etc.

[0033] Furthermore, the work machine 3 is equipped with a drive device (mechanism) such as a PTO (Power take-off) to supply power to the bucket 331 (attachment). Specifically, the drive device sends hydraulic fluid from a hydraulic pump driven by an engine to the bucket 331, and adjusts the amount of power supplied to the bucket 331 by adjusting the flow rate of the hydraulic fluid.

[0034] The passenger compartment 4 is a space for passengers to board, and has a passenger seat 41, and in this embodiment is located on the rotating section 32. In other words, the passenger compartment 4 is located on the rotating section 32 and has a passenger seat 41 (for passengers to sit in). Therefore, when the rotating section 32 rotates in a plan view, the passenger compartment 4 also rotates with it. Specifically, when the rotating section 32 is divided in the left-right direction D3, the passenger compartment 4 is provided on the left side. The passenger compartment 4 has at least a passenger seat 41 in which a passenger sits. Furthermore, when the rotating section 32 is divided in the left-right direction D3, the work machine 33 is provided on the right side, that is, on the side opposite to the passenger compartment 4. Therefore, the work machine 33 is positioned to the side of the passenger seat 41 on the rotating section 32.

[0035] The types of passenger compartments 4 for construction machinery and other work machines 3 include cabin type, canopy type, and floor type. A cabin-type passenger compartment 4 has a cabin, and the passenger sits in the cabin space inside the cabin. A canopy-type passenger compartment 4 has a canopy 42 that serves as a roof, and the passenger sits in the space below the canopy 42. A floor-type passenger compartment 4 does not have a cabin or canopy 42, and the passenger sits in an open space above. In other words, the passenger compartment 4 can include not only a form in which the perimeter is enclosed by panels or the like, but also various forms in which a space is provided where a passenger can sit. In this embodiment, the case where the passenger compartment 4 is of the canopy type will be described as an example.

[0036] In this embodiment, the passenger compartment 4 is located on the left side of the machine body 30 of the work machine 3. Furthermore, the passenger compartment 4 is located above the left crawler 311 (see Figure 1). Due to this arrangement, passengers will enter and exit the passenger compartment 4 from the left side. Therefore, in this embodiment, the entrance / exit to the passenger compartment 4 is located on the left side in the left-right direction D3 of the passenger compartment 4. In other words, passengers will enter and exit the passenger compartment 4 through the entrance / exit on the left side of the passenger compartment 4.

[0037] The canopy-type passenger compartment 4 is equipped with a canopy 42 that covers the area above the passenger seat 41. The canopy 42 is erected on the floor 43 of the passenger compartment 4, which corresponds to the upper surface of the swivel section 32. The passenger seat 41 is located on the floor 43. As a result, the space above the floor 43 and below the canopy 42 functions as the passenger compartment 4 for passengers to board.

[0038] The canopy 42 includes a support frame 421 and a roof 422, etc. In other words, the canopy 42 protects the occupant (operator) seated in the passenger seat 41 from sunlight and rain, etc. In a canopy-type passenger compartment 4 equipped with a canopy 42 as in this embodiment, at least the support frame 421 has sufficient strength (rigidity) to support the roof 422, etc. Furthermore, the canopy 42 may be detachable from the body 30 (swivel section 32) of the work machine 3.

[0039] The support frame 421 is a structural element that serves as the skeleton of the canopy 42 and is erected on the floor 43 of the passenger compartment 4. In this embodiment, as an example, the support frame 421 protrudes upward from a position on the floor 43 between the passenger seat 41 and the work machine 33, that is, from the right side of the passenger seat 41. The upper end of the support frame 421 has a shape that is bent to the right. The roof 422 is supported on the passenger seat 41 by the support frame 421. In a plan view, the roof 422 is sized and shaped to cover at least the passenger seat 41, the display device 34, and the operating device 35.

[0040] Furthermore, the passenger compartment 4 has a protective barrier 44 positioned in front of the passenger seats 41. The protective barrier 44 is erected at the front end of the floor 43. The protective barrier 44 does not form a wall, but consists of rod-shaped (tubular) members that can be grasped by passengers as handrails. For example, a part of the protective barrier 44 (in this case, the right end) is supported by a support frame 421.

[0041] The display device 34 is located in the passenger compartment 4 and serves as a user interface for outputting various information to the passenger (operator). The display device 34 is controlled by the control device and presents (outputs) various information by displaying various screens. In addition to display, the display device 34 also has a sound (including voice) output function and may present various information by sound. Furthermore, in this embodiment, the display device 34 includes input means such as a touch panel and accepts various operations by the user by outputting electrical signals corresponding to the passenger's operation. As a result, the passenger can view the display screen shown on the display device 34 and operate the display device 34 as needed.

[0042] The display device 34 is positioned in the passenger compartment 4, in front of the passenger seat 41 in the front-to-back direction D2 and to the right in the left-to-right direction D3. This allows passengers seated in the passenger seat 41 to view the display on the display device 34 without significantly changing their posture.

[0043] The control device 35 is located in the passenger compartment 4 and is a user interface for receiving operation input from the passenger (operator). In this embodiment, as an example, the control device 35 includes a pair of control levers 351, a pair of travel levers 352, and a control pedal 353. Here, it is assumed that the pair of control levers 351 are for operating the work equipment 33 and the slewing unit 32, the pair of travel levers 352 are for operating the travel unit 31, and the control pedal 353 is for operating the PTO or for offset operation of the work equipment 33.

[0044] The pair of operating levers 351 are located on both sides of the front end of the passenger seat 41 in the left-right direction D3. Therefore, a passenger seated in the passenger seat 41 can, for example, hold one operating lever 351 with their right hand and the other operating lever 351 with their left hand, and by operating these pair of operating levers 351, they can make the work machine 33 and the slewing unit 32 perform various operations.

[0045] The pair of travel levers 352 are located in front of the passenger seat 41 and in the center in the left-right direction D3. The pair of travel levers 352 protrude upward from the floor 43. The pair of travel levers 352 are located behind the protective railing 44, that is, between the passenger seat 41 and the protective railing 44. Here, the pair of travel levers 352 are inclined with respect to the vertical direction D1 so as to extend diagonally upward and backward from the floor 43. Therefore, a passenger seated in the passenger seat 41 can, for example, hold one travel lever 352 with their right hand and the other travel lever 352 with their left hand and operate these pair of travel levers 352 to make the travel unit 31 perform various actions.

[0046] The control pedal 353 is located in front of the passenger seat 41 and slightly to the right in the left-right direction D3. The control pedal 353 is installed on the floor 43. The control pedal 353 is located behind the protective barrier 44, that is, between the passenger seat 41 and the protective barrier 44. Therefore, a passenger seated in the passenger seat 41 can control the PTO by, for example, placing their right foot on the control pedal 353 and operating the control pedal 353 with their right foot.

[0047] Furthermore, various sensors and external accessories such as mirrors can be attached to the canopy 42.

[0048] As described above, the heating system 1 is a device that heats the passenger cabin 4 by sending heat into the passenger cabin 4 from a heat output unit 10 located facing the passenger cabin 4. The heating system 1 is mounted on the turning section 32 of the aircraft body 30 and is located facing the passenger cabin 4. The heating system 1 is controlled by a control signal from the control device in accordance with the operation of the passenger (operator). More details about the heating system 1 will be explained in section "[2] Details of the heating system".

[0049] The control device primarily consists of a computer system having, for example, one or more processors such as a CPU (Central Processing Unit) and one or more memories such as ROM (Read Only Memory) and RAM (Random Access Memory), and performs various processes (information processing). In this embodiment, the control device is an integrated controller that controls the entire work machine 3, and consists of, for example, an electronic control unit (ECU). However, the control device may be provided separately from the integrated controller, or it may primarily consist of one processor or multiple processors.

[0050] In addition to the above-described configuration, the work machine 3 is further equipped with a cutoff lever (gate lock lever), a communication device, a fuel tank, a hydraulic oil tank, a cooling water tank, and a battery. The cutoff lever is operable between a "raised position" and a "lowered position," and when the cutoff lever is in the "raised position," the operation of the work machine 3 is forcibly restricted without operation of the operating device 35.

[0051] [2] Details of the heating system Next, the heating device 1 in the work machine 3 according to this embodiment will be described in detail with reference to Figures 4 to 8. In the following description, we will mainly focus on the area surrounding the heating device 1 of the work machine 3, that is, the front section of the swivel unit 32.

[0052] For example, Figure 4 is a perspective view of the front section of the swivel unit 32 seen from diagonally above, and is an enlarged view of area Z1 in Figure 1. Figure 5 is a schematic diagram showing the left side view (enlarged view of area Z1 in Figure 2) and the front view (enlarged view of area Z1 in Figure 3) of the main part of the work machine 3 including the heating device 1. Figures 6 and 7 are schematic perspective views of the passenger compartment 4 seen from diagonally rear (Figure 7 is an exploded perspective view), with the display device 34, a pair of operating levers 351, etc. omitted from the illustration.

[0053] The heat output unit 10 (see Figure 6) of the heating device 1 is positioned in front of the footwell position Pf1 (see Figure 4) of the passenger seat 41. In other words, in the heating device 1, the heat output unit 10, which is the heat output unit that sends heat into the passenger compartment 4, is positioned facing the passenger compartment 4 and is located in front of the footwell position Pf1 of the passenger seat 41.

[0054] In this disclosure, the "foot position" refers to the position corresponding to the feet of the passenger (operator) seated in the passenger seat 41, and is, for example, in front of and below the passenger seat 41. Specifically, on the floor 43 of the passenger compartment 4, a space is provided in front of the passenger seat 41 for the passenger's feet to rest, and this space becomes the foot position Pf1 of the passenger seat 41. Here, as shown in Figures 4 and 5, the foot position Pf1 is set at a position at least lower than the seat surface of the passenger seat 41.

[0055] According to the above configuration, the heat output unit 10 of the heating device 1 is positioned in front of the footrest position Pf1 of the passenger seat 41, so that the heat (warm air) from the heating device 1 can more easily warm both legs of the passenger seated in the passenger seat 41 evenly. Furthermore, even in the case of a work machine 3 such as an ultra-short turning radius type or a rear ultra-short turning radius type, where there is not much room in the left-right direction D3 of the passenger compartment 4, the heating device 1 can be installed by utilizing the space in front of the footrest position Pf1. Therefore, the work machine 3 according to this embodiment has the advantage of making it easier to achieve an appropriate layout for the heating device 1.

[0056] Specifically, the heating device 1 comprises a main unit 11 and a cover body 12. The main unit 11 includes a fan that generates airflow and a heater positioned on the airflow generated by the fan. The cover body 12 is formed in a box shape that is slightly larger than the main unit 11 and is attached to and covers the main unit 11. In other words, the main unit 11 is housed in the cover body 12. In this embodiment, as an example, the cover body 12 is made of a weather-resistant metal.

[0057] Here, the cover body 12 has an outlet that serves as a heat output unit 10 for blowing out the warm air sent from the air outlet of the main unit 11. The cover body 12 further has an intake port 121 that serves as an air inlet. Within the cover body 12, an airflow path is formed between the heat output unit 10 (outlet) and the air outlet of the main unit 11. As a result, the main unit 11 housed in the cover body 12 heats the air taken into the cover body 12 from the intake port 121 of the cover body 12 and outputs (blows out) warm air from the heat output unit 10 of the cover body 12.

[0058] Thus, in this embodiment, the main unit 11 of the heating device 1 is integrally configured with the heat output unit 10, which is the air outlet. In other words, the main unit 11 is housed within the cover body 12 on which the heat output unit 10 is formed, and the air outlet of the main unit 11 and the heat output unit 10 of the cover body 12 are connected by a flow path, thereby integrating the heat output unit 10 with the main unit 11.

[0059] According to the above configuration, the heating system 1 can deliver heat (heat from the warm air) into the passenger compartment 4 by blowing out air (warm air) heated by the heater from an outlet that serves as a heat output unit 10 using a fan. The heater only needs to be capable of heating air (airflow), and can be implemented, for example, by an electric type such as an electric heating element, or by a heat exchanger that utilizes the waste heat from the engine.

[0060] More specifically, as shown in Figures 4 to 6, the cover body 12 that forms the outer casing of the heating device 1 has a rectangular parallelepiped shape that is flattened in the front-to-back direction. Multiple heat output units 10, which are hot air outlets, are formed on the rear surface (back) of the cover body 12 (two in this case). The multiple heat output units 10 are arranged side by side in the left-to-right direction D3. Each of these multiple heat output units 10 is a through-hole that penetrates the rear wall of the cover body 12 and opens in a rectangular shape with a length in the left-to-right direction D3, and is configured so that the direction of hot air discharge can be controlled by a louver.

[0061] Furthermore, multiple air intake ports 121 are formed on both sides of the cover body 12 in the left-right direction D3 (two in this case). Each of these multiple intake ports 121 is a through-hole that penetrates the side wall of the cover body 12.

[0062] Multiple heat output units 10 are positioned at least above (higher than) the floor 43. Furthermore, in this embodiment, as an example, multiple heat output units 10 are positioned above multiple intake ports 121. Therefore, the main unit 11 generates an upward airflow so as to heat the air taken in from the bottom of the cover body 12 and discharge it as warm air from the top of the cover body 12. This enables the heating device 1 to efficiently heat cold air and output warm air.

[0063] As described above, the heating device 1 has a cover body 12 positioned in front of the footwell position Pf1 of the passenger seat 41. Consequently, the heat output unit 10, which is located on the rear surface of the cover body 12, is also necessarily positioned in front of the footwell position Pf1. Moreover, the heat output unit 10 is positioned towards the rear, that is, towards the passenger seat 41. Since the main unit 11 is housed in the cover body 12, the heating device 1, including the main unit 11, is positioned in front of the footwell position Pf1 of the passenger seat 41. In other words, the main unit 11 of the heating device 1 is positioned in front of the footwell position Pf1 of the passenger seat 41, together with the heat output unit 10. This makes it possible to keep the distance from the main unit 11 to the heat output unit 10 short, and to minimize heat loss between the main unit 11 and the heat output unit 10.

[0064] Furthermore, the heating device 1 is supported by the protective fence 44. That is, the heating device 1 is fixed using the protective fence 44 located in front of the passenger seats 41 in the passenger compartment 4. In other words, the member for fixing the heating device 1 also serves as the protective fence 44. This makes it possible to support (fix) the heating device 1 while making effective use of the limited space in the passenger compartment 4.

[0065] It is preferable that the heating device 1 be detachably attached to the protective fence 44 so that maintenance of the heating device 1 can be performed. Furthermore, as shown in Figure 5, it is preferable that when the heating device 1 is attached to the protective fence 44, a gap is provided between the lower surface of the heating device 1 (its cover body 12) and the upper surface of the swivel section 32, so that the heating device 1 appears to be floating.

[0066] In this embodiment, as shown in Figures 7 and 8, the heating device 1 is positioned facing the protective fence 44 from the front. In short, the heating device 1 is positioned in front of the protective fence 44. Specifically, the cover body 12 of the heating device 1 is attached to the protective fence 44 via a bracket 45, as shown in Figure 7. The bracket 45 is fixed to the cover body 12 using fasteners such as bolts and nuts.

[0067] A pair of brackets 45 are provided, and the pair of brackets 45 are fixed to a pair of support posts of the protective fence 44. Here, the pair of support posts are cylindrical (tube-shaped) members having a length in the vertical direction D1, and are spaced apart in the left-right direction D3. The cover body 12 of the heating device 1 is attached across these pair of support posts by the pair of brackets 45.

[0068] As explained above, the heating device 1 is mounted on the outside of the protective fence 44, that is, on the side opposite to the passenger seat 41 when viewed from the protective fence 44. With the heating device 1 mounted on the protective fence 44, at least a portion of the heating device 1 protrudes forward from the front surface 323 of the swivel section 32. In this embodiment, as an example, most of the cover body 12 of the heating device 1 protrudes forward from the front surface 323 of the swivel section 32. That is, because the heating device 1 is positioned on the outside of the protective fence 44 located at the front end of the passenger compartment 4, at least a portion of the heating device 1 protrudes outward (forward) from the outer edge of the swivel section 32 in a plan view.

[0069] Therefore, interference between the heating device 1 and other equipment installed in the passenger compartment 4 can be avoided, while preventing the heating device 1 from narrowing the space in front of the passenger seat 41 in the passenger compartment 4. Moreover, the heating device 1 only protrudes forward from the front surface 323 of the slewing section 32, and is positioned so as to fit within the width of the slewing section 32 in the left-right direction D3. Thus, even though the heating device 1 protrudes from the slewing section 32, it is unlikely to come into contact with objects around the slewing section 32 (including the work equipment 33, etc.).

[0070] Furthermore, since the heating device 1 is installed outside the protective fence 44, it is necessarily positioned in front of the operating parts such as the pair of travel levers 352 and operating pedals 353, which are located behind the protective fence 44. In other words, in the longitudinal direction D2, the operating parts (the pair of travel levers 352 and operating pedals 353, etc.) operated by the operator riding in the passenger compartment 4 are located between the heat output unit 10 and the passenger seat 41. This makes it possible to avoid interference between the operating parts installed in the passenger compartment 4 and the heating device 1, while suppressing the narrowing of the space in front of the passenger seat 41 in the passenger compartment 4 by the heating device 1. In particular, by positioning the heat output unit 10 in front of the operating pedals 353, it becomes possible to efficiently warm the feet of the operator who operates the operating pedals 353.

[0071] Furthermore, the heat output unit 10 of the heating device 1 is positioned offset to one side in the left-right direction D3 relative to the pair of travel levers 352. In this embodiment, the heat output unit 10 of the heating device 1 is positioned offset to the right of the pair of travel levers 352 so as to be located approximately in front of the operating pedal 353 (see Figure 8). This makes it easier for the heat (warm air) from the heat output unit 10 to reach the passenger seat 41 without being obstructed by the pair of travel levers 352.

[0072] Furthermore, as shown in Figure 8, the heating device 1 is positioned in a plan view such that it fits inside the virtual circle Vc1 occupied by the swivel section 32 when the swivel section 32 is rotating. In Figure 8, the canopy 42 is shown by a dashed line. Specifically, the heating device 1 is positioned in the left-right direction D3, slightly offset from the center of the passenger seat 41 towards the center of the swivel section 32. Here, as shown in Figure 8, assuming a virtual circle Vc1 centered on the rotation axis of the swivel section 32 and with a diameter smaller than the total width W1 of the running section 31 (total width of the pair of left and right crawlers 311), the heating device 1 fits within this virtual circle Vc1 in a plan view. In other words, even when the swivel section 32 rotates, the heating device 1 does not extend beyond the virtual circle Vc1, and as a result, the heating device 1 always fits within the width W1 of the running section 31. This makes it less likely for the heating device 1 to interfere with the rotational movement of the swivel section 32.

[0073] Furthermore, in this embodiment, the work equipment 33 is positioned to the side of the passenger seat 41 on the rotating section 32. Therefore, interference between the heat output section 10 of the heating device 1, which is positioned in front of the passenger seat 41's foot position Pf1, and the work equipment 33 can be easily avoided.

[0074] [3] Variant The following lists some modifications of Embodiment 1. The modifications described below can be combined and applied as appropriate.

[0075] Furthermore, the passenger compartment 4 is not limited to a canopy type; it may also be a cabin type or a floor type, for example. For example, if the passenger compartment 4 is a floor type, the canopy 42 is omitted.

[0076] Furthermore, the entrance / exit of the passenger compartment 4 is not limited to being located on the left side of the passenger compartment 4, as in Embodiment 1. In other words, the entrance / exit for passengers to get on and off only needs to be located on at least one side in the left-right direction D3 of the passenger compartment 4, and may be located, for example, on the right side of the passenger compartment 4, or on both sides in the left-right direction D3. When the entrance / exit is located on the right side of the passenger compartment 4, it is preferable that the heating device 1 is positioned offset to the left when viewed from the pair of travel levers 352.

[0077] Furthermore, it is not mandatory for the work machine 3 to be either "ultra-short swing type" or "rear ultra-short swing type".

[0078] Furthermore, the power source for the work machine 3 is not limited to a diesel engine; for example, it may be an engine other than a diesel engine, or a motor (electric motor), or a hybrid power source including both an engine and a motor (electric motor).

[0079] Furthermore, the display device 34 and the operating device 35, etc., are not limited to being mounted on the aircraft body 30, but may, for example, be provided separately from the aircraft body 30. In this case, the display device 34 and the operating device 35, etc., are configured to communicate with the aircraft body 30, thereby enabling remote control of the aircraft body 30.

[0080] Furthermore, the heating device 1 only needs to have a heating function, and may also have additional functions such as a cooling function and / or an air purification function. Moreover, it is not essential that the heating device 1 has two heat output units 10; the heating device 1 may have one or three or more heat output units 10.

[0081] Furthermore, it is not essential that the operating section (a pair of travel levers 352 and an operating pedal 353, etc.) be positioned between the heat output unit 10 and the passenger seat 41 in the front-rear direction D2. It is also not essential that the main unit 11 of the heating device 1 be positioned in front of the footwell position Pf1 of the passenger seat 41, integrated with the heat output unit 10. For example, the main unit 11, which is separate from the heat output unit 10 and connected to the heat output unit 10 by a duct, may be positioned at a different location from the heat output unit 10.

[0082] Furthermore, it is not essential that at least a portion of the heating device 1 protrudes forward from the front surface 323 of the slewing section 32. It is also not essential that the heating device 1, in a plan view, be located inside the virtual circle Vc1 occupied by the slewing section 32 when it is slewing. It is also not essential that the heating device 1 be supported by the protective fence 44. It is also not essential that the work equipment 33 be positioned to the side of the passenger seat 41 on the slewing section 32.

[0083] (Embodiment 2) The work machine 3A according to this embodiment differs from the work machine 3 according to Embodiment 1 in that it is equipped with multiple heating devices 1 (two in this case), as shown in Figure 9. Hereinafter, components similar to those in Embodiment 1 will be denoted by common reference numerals, and their descriptions will be omitted as appropriate.

[0084] In this embodiment, as shown in Figure 9, the two heating devices 1 are arranged side by side in the left-right direction D3. Both heating devices 1 are supported by a protective fence 44. These two heating devices 1 are configured to be operated simultaneously or individually.

[0085] The various configurations described in Embodiment 2 can be appropriately combined with the various configurations (including modified versions) described in Embodiment 1.

[0086] [Notes on the invention] The following is an overview of the invention extracted from the above-described embodiments. Note that each configuration and processing function described below can be selected and combined as desired.

[0087] <Note 1> The running gear and A swivel section is positioned above the aforementioned travel section and, in a plan view, is capable of swiveling relative to the aforementioned travel section. A passenger compartment located on the aforementioned rotating section and having passenger seats, The system includes a heating device that heats the passenger compartment by supplying heat into the passenger compartment from a heat output unit positioned facing the passenger compartment, The heat output unit of the heating device is located in front of the footwell of the passenger seat. A type of machinery used for industrial work.

[0088] <Note 2> Between the heat output unit and the passenger seat in the front-rear direction, an operating unit is positioned which is operated by an operator riding in the passenger compartment. The work machines described in Appendix 1.

[0089] <Note 3> The main unit of the heating device is positioned in front of the footwell of the passenger seat, integrated with the heat output unit. The work machines described in Appendix 1 or 2.

[0090] <Note 4> At least a portion of the heating device protrudes forward from the front surface of the rotating section. A work machine as described in any of the appendices 1 to 3.

[0091] <Note 5> The heating device is positioned such that, in a plan view, it fits inside the virtual circle occupied by the rotating part when it rotates. A work machine as described in any of the appendices 1 to 4.

[0092] <Note 6> A protective barrier is positioned in front of the aforementioned passenger seat. The heating device is supported by the protective fence. A work machine as described in any of the appendices 1 to 5.

[0093] <Note 7> On the rotating section, a work machine is positioned to the side of the passenger seat. A work machine as described in any of the appendices 1 to 6. [Explanation of Symbols]

[0094] 1. Heating system 3.3A Working Machinery 4 boarding cabin 10. Thermal output section 11 Main Unit 31 Running section 32 Swivel section 33 Work Machines 41 passenger seats 44 Protective fence 323 Front 352. Travel lever (operating part) 353 Operating pedal (control unit) D2 Anteroposterior direction Pf1 Foot position Vc1 Virtual Yen

Claims

1. The running gear and A swivel section is positioned above the aforementioned travel section and, in a plan view, is capable of swiveling relative to the aforementioned travel section. A passenger compartment located on the aforementioned rotating section and having passenger seats, The system includes a heating device that heats the passenger compartment by supplying heat into the passenger compartment from a heat output unit positioned facing the passenger compartment, The heat output unit of the heating device is located in front of the footwell of the passenger seat. At least a portion of the heating device protrudes forward from the front surface of the rotating section. A type of machinery used for industrial work.

2. A running section, A swivel section is positioned above the aforementioned travel section and, in a plan view, is capable of swiveling relative to the aforementioned travel section. A passenger compartment located on the aforementioned rotating section and having passenger seats, The system includes a heating device that heats the passenger compartment by supplying heat into the passenger compartment from a heat output unit positioned facing the passenger compartment, The heat output unit of the heating device is located in front of the footwell of the passenger seat. A protective barrier is positioned in front of the aforementioned passenger seat. The heating device is supported by the protective fence. A type of machinery used for industrial work.

3. Between the heat output unit and the passenger seat in the front-rear direction, an operating unit is positioned which is operated by an operator riding in the passenger compartment. The work machine according to claim 1 or 2.

4. The main unit of the heating device is positioned in front of the footwell of the passenger seat, integrated with the heat output unit. The work machine according to claim 1 or 2.

5. The heating device is positioned such that, in a plan view, it fits inside the virtual circle occupied by the rotating part when it rotates. The work machine according to claim 1 or 2.

6. On the rotating section, a work machine is positioned to the side of the passenger seat. The work machine according to claim 1 or 2.

Images