Work machine

Abstract

To provide a work machine having a configuration suitable for a small machine body which allows a pilot lamp to be easily seen from the front of a machine body and reduces a risk of the pilot lamp being positioned above a regulated height during transportation.SOLUTION: A hydraulic shovel as a work machine includes a work device, a driving section for operating the work device, and a pilot lamp displaying information about a machine body. The driving section is arranged at one side of the machine body in the right-left direction, the work device is arranged adjacently to the driving section at the other side of the machine body in the right-left direction, and the pilot lamp is located to be offset at the other side of the machine body in the right-left direction relative to the work device.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a working machine.

Background Art

[0002] Patent Document 1 discloses a hydraulic excavator including a cab, a boom disposed to the right adjacent to the cab, and a rotating lamp disposed on the top plate of the cab. The rotating lamp lights up during crane operation and functions as an indicator lamp indicating that the hydraulic excavator is in crane operation.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when transporting a working machine such as a hydraulic excavator, transportation regulations are provided. Therefore, for example, it is necessary to make the height of the machine body lower than the regulated height. However, in the configuration of Patent Document 1, since the rotating lamp is located protruding upward from the top plate of the cab, the height of the machine body may increase by the height of the rotating lamp and may exceed the regulated height.

[0005] In addition, during crane operation, usually, an operator (a slinging operator) who performs slinging is located in front of the machine body. For this reason, it is desirable that an indicator lamp such as a rotating lamp be disposed at a position where it can be easily visually recognized from the front of the machine body without being blocked by the boom. However, in a small working machine with limited arrangement space, it may be difficult to arrange the indicator lamp so that it can be easily visually recognized from the front of the machine body.

[0006] The present invention has been made to solve the above problems, and an object thereof is to provide a working machine having a configuration suitable for a small-sized machine body, capable of easily visually recognizing an indicator lamp from the front of the machine body, and reducing the risk that the indicator lamp is positioned above a height restricted during transportation.

Means for Solving the Problems

[0007] A working machine according to one aspect of the present invention includes a working device, an operation unit where the operation of the working device is performed, and an indicator lamp that displays information of the machine body. The operation unit is disposed on one side in the left-right direction of the machine body, the working device is disposed adjacent to the other side in the left-right direction of the machine body with respect to the operation unit, and the indicator lamp is disposed shifted to the other side in the left-right direction of the machine body with respect to the working device.

Effects of the Invention

[0008] According to the above configuration, with a configuration suitable for a small-sized machine body, the indicator lamp can be easily visually recognized from the front of the machine body, and the risk that the indicator lamp is positioned above a height restricted during transportation can be reduced.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0010] The embodiments of the present invention will be described as follows with reference to the drawings.

[0011] 〔1. Schematic Configuration of Working Machine〕 FIG. 1 is a right side view showing a schematic configuration of a hydraulic excavator 1 which is an example of a working machine according to an embodiment of the present invention. FIG. 2 is a left side view of the hydraulic excavator 1. FIG. 3 is a front view of the hydraulic excavator 1. The hydraulic excavator 1 includes a lower traveling body 2 (also simply referred to as a traveling body), a working device 3, and an upper swing body 4 (also simply referred to as a swing body). In the following description, the hydraulic excavator 1 may also be referred to as the "machine body".

[0012] In the present embodiment, the directions are defined as follows. The direction in which the operator (driver, operator) sitting on the driver's seat 44a arranged in the operation part 44 of the upper swing body 4 faces forward is defined as "front", and the opposite direction is defined as "rear". When the upper swing body 4 is in a non-swing state (swing angle 0 degrees) with respect to the lower traveling body 2, the front-rear direction of the upper swing body 4 coincides with the front-rear direction of the lower traveling body 2. In the drawings, the hydraulic excavator 1 is shown with the upper swing body 4 in a non-swing state with respect to the lower traveling body 2. Also, the left side as seen from the operator sitting on the driver's seat 44a is defined as "left", and the right side as "right". Further, the gravitational direction perpendicular to the front-rear direction and the left-right direction is defined as the up-down direction, the upstream side in the gravitational direction is defined as "up", and the downstream side as "down". In the drawings, if necessary, the front is indicated by the symbol "F", the rear by "B", the right by "R", the left by "L", the upper by "U", and the lower by "D".

[0013] In this embodiment, among the left - right directions, the left side is defined as "one side of the left - right direction", and the right side is defined as "the other side of the left - right direction". Therefore, in the following description, the left side may also be referred to as "one side of the left - right direction", and the right side may be referred to as "the other side of the left - right direction".

[0014] The lower traveling body 2 includes a pair of left - right crawlers 21, a pair of left - right traveling motors 22, and a blade 23. By driving the left - right traveling motors 22 to drive the left - right crawlers 21 respectively, the hydraulic excavator 1 can move forward and backward. The traveling motor 22 is composed of a hydraulic motor. The blade 23 for performing leveling work or the like is provided on the front side of the lower traveling body 2. The blade 23 is rotated by a blade cylinder (not shown). The tip of the blade cylinder is connected to the blade 23, and the base end is connected to the front part of the upper swing body 4. The blade cylinder is composed of a hydraulic cylinder.

[0015] The working device 3 includes a boom 31, an arm 32, and a bucket 33. By driving the boom 31, the arm 32, and the bucket 33 independently, excavation work such as earth and sand can be performed.

[0016] The boom 31 has a lower boom 31a, an upper boom 31b, and an arm stay 31c. In this embodiment, the lower boom 31a is referred to as a "working machine". The base end of the lower boom 31a is rotatably connected to the front part of the upper swing body 4. Also, the lower boom 31a is rotated by a boom cylinder 31a1. Details of the connection structure of the lower boom 31a will be described later.

[0017] The base end portion of the upper boom 31b is pivotally connected to the tip end portion of the lower boom 31a so as to be rotatable in the left - right direction. The arm stay 31c is pivotally connected to the tip end portion of the upper boom 31b so as to be rotatable in the left - right direction. The base end portion of the offset cylinder 31b1 is connected to the left side surface of the base end portion of the upper boom 31b. The tip end portion of the offset cylinder 31b1 is connected to the left side surface of the arm stay 31c. The offset cylinder 31b1 is movably telescopic. The left side surface of the arm stay 31c and the left side surface of the tip end portion of the lower boom 31a are connected by a link rod 31b2.

[0018] When the offset cylinder 31b1 expands and contracts, the upper boom 31b rotates in the left - right direction with respect to the lower boom 31a, and the arm stay 31c moves (offsets) in the left - right direction. At this time, the arm stay 31c rotates in the left - right direction with respect to the upper boom 31b. As a result, the arm stay 31c moves in the left - right direction without rotating in the left - right direction with respect to the lower boom 31a.

[0019] The base end portion of the arm 32 is pivotally connected to the arm stay 31c so as to be rotatable in the vertical and front - rear directions. The tip end portion of the arm cylinder 32a is connected to the base end portion of the arm 32. The intermediate portion between the tip end portion and the base end portion of the arm cylinder 32a is connected to the arm stay 31c. The arm cylinder 32a is movably telescopic. When the arm cylinder 32a expands and contracts, the arm 32 rotates in the vertical and front - rear directions with respect to the arm stay 31c.

[0020] The bucket 33 is pivotally connected to the tip end portion of the arm 32 so as to be rotatable in the vertical and front - rear directions. The bucket 33 is also connected to the arm 32 via a link mechanism 34. The base end portion of the bucket cylinder 33a is connected to the base end portion of the arm 32. The tip end portion of the bucket cylinder 33a is connected to the link mechanism 34. The bucket cylinder 33a is movably telescopic. When the bucket cylinder 33a expands and contracts, the bucket 33 rotates in the vertical and front - rear directions with respect to the arm 32.

[0021] The boom cylinder 31a1, the offset cylinder 31b1, the arm cylinder 32a, and the bucket cylinder 33a are constituted by hydraulic cylinders.

[0022] A hook 35 is provided at the connecting portion between the bucket 33 and the link mechanism 34. The hook 35 is constituted by a hook-shaped metal member for performing a hanging operation (also called a crane operation). Here, the hanging operation means an operation of hanging a suspended load on the hook 35 via a member such as a chain and raising and lowering it (lifting operation, lowering operation), and an operation of moving the suspended load while it is suspended.

[0023] The hook 35 is rotatably attached with a connecting shaft (not shown) that connects the bucket 33 and the link mechanism 34 as a rotation fulcrum. The hook 35 can change its posture between a stored state (see FIGS. 1 and 2) stored on the link mechanism 34 side and a deployed state protruding downward. For example, when performing an excavation operation with the bucket 33, the hook 35 is set to the stored state, and when performing a hanging operation with the hook 35, the hook 35 is set to the deployed state.

[0024] The upper swing body 4 is located above the lower traveling body 2 and is provided so as to be swingable with respect to the lower traveling body 2 via a swing bearing (not shown). The upper swing body 4 includes a swing frame 41, a swing motor 42, a machine room 43, an operation unit 44, an indicator lamp 45, and an antenna unit 46. That is, the hydraulic excavator 1 includes a swing frame 41, a swing motor 42, a machine room 43, an operation unit 44, an indicator lamp 45, and an antenna unit 46.

[0025] The upper swing body 4 swings via the above-described swing bearing by the drive of the swing motor 42 disposed on the swing frame 41. The swing frame 41 is configured to include a plurality of metal members joined by welding or the like. The swing motor 42 is constituted by a hydraulic motor.

[0026] The engine room 43 houses the engine EG. The engine EG is the driving source of the hydraulic excavator 1. The engine EG is composed of a diesel engine, but is not limited thereto, and may be composed of, for example, a gasoline engine.

[0027] In addition to the engine EG, the engine room 43 houses a plurality of hydraulic pumps (not shown). Each of the above hydraulic pumps supplies hydraulic oil (pressure oil) to a hydraulic motor and a hydraulic cylinder. The above hydraulic motors are, for example, the left and right travel motors 22 and the swing motor 42. The above hydraulic cylinders are, for example, a blade cylinder, a boom cylinder 31a1, an offset cylinder 31b1, an arm cylinder 32a, and a bucket cylinder 33a. The hydraulic motors and hydraulic cylinders driven by hydraulic oil are collectively referred to as hydraulic actuators.

[0028] The engine room 43 is provided with a rear bonnet 43B, a left bonnet 43L, a right bonnet 43R, a tank cover TC, and a cover member C1. The configuration of the cover member C1 will be described later.

[0029] The rear bonnet 43B is composed of a metal plate-like member extending in the left-right direction. The rear bonnet 43B is configured to be bent forward from the center in the left-right direction as it goes leftward. Also, the rear bonnet 43B is configured to be bent forward from the center in the left-right direction as it goes rightward. That is, the rear bonnet 43B is curved so as to bulge rearward. The rear bonnet 43B is disposed on the rear side of the engine room 43. The rear bonnet 43B constitutes the rear end portion 4B of the upper swing body 4. Note that the rear bonnet 43B may be composed of a resin member.

[0030] The left bonnet 43L is composed of a metal plate-like member extending in the front-rear direction. The left bonnet 43L is disposed on the left side of the engine room 43. Note that the rear bonnet 43B may be composed of a resin member.

[0031] The right bonnet 43R is composed of a front right bonnet 43R1 and a rear right bonnet 43R2. The front right bonnet 43R1 and the rear right bonnet 43R2 are each composed of a plate-shaped metal member extending in the front-rear direction. The front right bonnet 43R1 is arranged on the right front side of the machine room 43. The rear right bonnet 43R2 is arranged on the right rear side of the machine room 43. Note that the front right bonnet 43R1 and the rear right bonnet 43R2 may be composed of resin members.

[0032] The tank cover TC is composed of a plate-shaped resin member extending in the vertical direction. The tank cover TC is arranged on the front side of the machine room 43. In particular, the tank cover TC is arranged above the left of the front right bonnet 43R1. A fuel tank (not shown) is arranged on the left side of the front right bonnet 43R1 behind the tank cover TC. Liquid fuel (e.g., light oil) is stored (accommodated) in the above fuel tank. Note that the tank cover TC may be composed of a metal member.

[0033] The rear bonnet 43B, the left bonnet 43L, the right bonnet 43R (the front right bonnet 43R1, the rear right bonnet 43R2), and the tank cover TC are each fixed to the swivel frame 41 via a support member (not shown).

[0034] The operation unit 44 is arranged on the upper left side of the upper revolving body 4 (see FIG. 3 in particular). That is, the operation unit 44 is arranged on one side (the left side) in the left-right direction of the machine body. The operation unit 44 is provided with an operation seat 44a. A plurality of operation members 44b are arranged around the operation seat 44a. The plurality of operation members 44b are configured to include levers, switches, pedals, etc. When the operator sits on the operation seat 44a and operates the plurality of operation members 44b, the above hydraulic actuator is driven. Thereby, the traveling of the lower traveling body 2, the ground leveling work by the blade 23, the excavation work by the bucket 33, the lifting work by the hook 35, the turning of the upper revolving body 4, etc. can be performed. The operation unit 44 is also provided with a canopy 44c. The canopy 44c covers the upper side and the right side of the operation seat 44a. The configuration of the canopy 44c will be described later.

[0035] The indicator lamp 45 and the antenna unit 46 are arranged on the upper revolving body 4. The indicator lamp 45 is composed of, for example, an LED (Light Emitting Diode) that emits multicolor light. The indicator lamp 45 may be composed of a light source (lamp) that emits single-color light, or may be composed of a rotating lamp. An antenna 47 is arranged inside the antenna unit 46. The antenna 47 enables the acquisition of the position information of the machine body and enables wireless communication with the outside of the machine body.

[0036] 〔2. Connection Structure of Working Machine〕 The connection structure of the lower boom 31a will be described with reference to FIG. 4. FIG. 4 is a perspective view from the left front showing an enlarged view of the vicinity of the base end of the lower boom 31a. In FIG. 4, for the sake of convenience, the illustration of the lower traveling body 2, the canopy 44c, etc. is omitted.

[0037] The base end of the lower boom 31a is connected to the boom connection portion 41a of the slewing frame 41. The boom connection portion 41a is provided at the right front portion of the slewing frame 41. More specifically, the boom connection portion 41a is arranged right next to the operation unit 44.

[0038] The boom connecting portion 41a is provided with a first insertion hole (not shown) penetrating in the left-right direction. At the base end portion of the lower boom 31a, a second insertion hole (not shown) penetrating in the left-right direction is provided at a position corresponding to the above-described first insertion hole. The boom pin P1 is inserted and fitted into the first insertion hole of the boom connecting portion 41a and the second insertion hole of the lower boom 31a from the left side. Thereby, the lower boom 31a and the boom connecting portion 41a are connected via the boom pin P1. As described above, since the boom connecting portion 41a is located immediately to the right of the operation unit 44, the lower boom 31a is connected immediately to the right of the operation unit 44. That is, the working machine (lower boom 31a) is arranged adjacent to the operation unit 44 on the other side (right side) in the left-right direction.

[0039] Further, the lower boom 31a is supported so as to be rotatable in the vertical direction and the front-rear direction with the boom pin P1 as a rotation fulcrum. That is, the working machine is arranged so as to be rotatable in the vertical direction and the front-rear direction.

[0040] The slewing frame 41 also has a cylinder connecting portion 41b in front of the boom connecting portion 41a. The base end portion of the boom cylinder 31a1 is connected to the cylinder connecting portion 41b. The tip end portion of the boom cylinder 31a1 is connected to the tip end portion of the lower boom 31a. The boom cylinder 31a1 is movable in a telescopic manner. When the boom cylinder 31a1 expands and contracts, the lower boom 31a rotates in the vertical direction and the front-rear direction with respect to the slewing frame 41. As described above, the boom cylinder 31a1 is driven by operating any one of a plurality of operating members 44b arranged in the operation unit 44. That is, in the operation unit 44, the operation of the working machine is performed.

[0041] In FIG. 4, the lower boom 31a in the state of being rotated most rearward is illustrated. Also in the drawings other than FIG. 4, when the lower boom 31a is illustrated, it is illustrated in the above-described state. Therefore, also in FIGS. 1, 2, and 3, the lower boom 31a in the state of being rotated most rearward is illustrated.

[0042] 〔3. Configuration of Control System for Indicator Lights and Antenna〕 Details of the indicator lamp 45 and the antenna 47 will be described. First, the configuration of the control system related to the indicator lamp 45 and the antenna 47 will be described with reference to FIG. 5. FIG. 5 is a block diagram schematically showing the configuration of the control system related to the indicator lamp 45 and the antenna 47. The hydraulic excavator 1 includes a plurality of types of sensors 51, a control device 52, and a positioning unit 53, in addition to the indicator lamp 45 and the antenna 47.

[0043] The plurality of types of sensors 51 detect information of the hydraulic excavator 1 and output the detected information to the control device 52. Each of the plurality of types of sensors 51 is connected to the control device 52 so as to be able to input a signal. In the present embodiment, the plurality of types of sensors 51 include a plurality of angle sensors 51a and a pressure sensor 51b.

[0044] The plurality of angle sensors 51a include a lower boom angle sensor 51a1, an upper boom angle sensor 51a2, and an arm angle sensor 51a3. The lower boom angle sensor 51a1 detects the rotation angle of the lower boom 31a with respect to the swing frame 41. The upper boom angle sensor 51a2 detects the rotation angle of the upper boom 31b with respect to the lower boom 31a. The arm angle sensor 51a3 detects the rotation angle of the arm 32 with respect to the arm stay 31c. The lower boom angle sensor 51a1, the upper boom angle sensor 51a2, and the arm angle sensor 51a3 make it possible to detect the posture of the working device 3.

[0045] Note that the sensor for detecting the posture of the working device 3 is not limited to an angle sensor, and may be, for example, a stroke sensor. The stroke sensor detects the stroke amount of the hydraulic cylinder. For example, a stroke sensor may be provided for each of the boom cylinder 31a1, the offset cylinder 31b1, and the arm cylinder 32a to detect the stroke amount of each cylinder. Further, a configuration in which an angle sensor and a stroke sensor are used in combination may also be adopted.

[0046] The pressure sensor 51b detects the pressure of the hydraulic cylinder that drives the working device 3. For example, the pressure sensor 51b is provided at least on the flow path of the hydraulic oil flowing on the bottom side of the cylinder part in the boom cylinder 31a1 of the working device 3, and detects the pressure of this hydraulic oil. In the present embodiment, this pressure is taken as the pressure of the boom cylinder 31a1 (the pressure applied to the boom cylinder 31a1).

[0047] In addition to the bottom side of the cylinder part of the boom cylinder 31a1, the pressure sensor 51b may also be provided on the tip side of the cylinder part (the side where the rod protrudes from the cylinder part). In this case, the pressure of the boom cylinder 31a1 is determined based on the pressure on the bottom side of the cylinder part and the pressure on the tip side of the cylinder part.

[0048] The control device 52 is composed of an electronic control unit also called an ECU (Electronic Control Unit), and performs electrical control of each part of the hydraulic excavator 1. In particular, the control device 52 determines the stable state of the hydraulic excavator 1 during lifting work based on the rated load (t) when the working device 3 lifts a suspended load and the actual load (t) of the suspended load. The above-mentioned rated load means the load that can be lifted after subtracting the weight of the hook 35. More specifically, the control device 52 includes a rated load calculation unit 52a, an actual load calculation unit 52b, and a state determination unit 52c.

[0049] The rated load calculation unit 52a obtains the working radius from the posture of the working device 3 detected by a plurality of angle sensors 51a (for example, the rotation angles of the lower boom 31a, the upper boom 31b, and the arm 32). The above-mentioned working radius means the horizontal distance from the swing center axis AX (see FIGS. 1 and 2) of the hydraulic excavator 1 to the hook 35. Based on this working radius, the rated load calculation unit 52a calculates the rated load. For example, the rated load calculation unit 52a stores the rated load corresponding to the working radius. Thereby, the rated load calculation unit 52a can obtain the rated load according to the working radius.

[0050] The actual load calculation unit 52b calculates the actual load of the suspended load based on the posture of the working device 3 detected by a plurality of angle sensors 51a and the pressure of the hydraulic cylinder detected by the pressure sensor 51b. For example, the actual load calculation unit 52b stores, as a map, the relationship between the pressure of the boom cylinder 31a1 and the actual load of the suspended load for each working radius during the lifting operation of the working device 3. Thereby, the actual load calculation unit 52b can obtain the actual load of the suspended load based on the working radius and the pressure of the boom cylinder 31a1.

[0051] The state determination unit 52c determines the stable state of the hydraulic excavator 1 during the lifting operation based on the rated load calculated by the rated load calculation unit 52a and the actual load calculated by the actual load calculation unit 52b. For example, if the actual load is 90% or less of the rated load, the state determination unit 52c determines that the hydraulic excavator 1 is in a state (level 1) where it can perform the lifting operation safely. Further, if the actual load is greater than 90% and less than or equal to the rated load, the state determination unit 52c determines that the stable state of the hydraulic excavator 1 is lower than level 1, but the lifting operation is possible (level 2). Furthermore, if the actual load is greater than the rated load, the state determination unit 52c determines that the stable state of the hydraulic excavator 1 is lower than level 2 and that the lifting operation should be stopped (level 3).

[0052] The state determination unit 52c controls the indicator lamp 45 according to the stable state (level 1, level 2, level 3) of the hydraulic excavator 1. For example, if the stable state of the hydraulic excavator 1 is level 1, the state determination unit 52c turns on the indicator lamp 45 in blue. If the stable state of the hydraulic excavator 1 is level 2, the state determination unit 52c turns on the indicator lamp 45 in yellow. If the stable state of the hydraulic excavator 1 is level 3, the state determination unit 52c turns on the indicator lamp 45 in red. Thereby, when the slinger operator or the like views the indicator lamp 45, they can recognize which level the stable state of the hydraulic excavator 1 is in. That is, the indicator lamp 45 displays the information of the machine body (in this embodiment, the stable state of the hydraulic excavator 1 during the lifting operation).

[0053] Antenna 47 has a receiving section 47a and a transmitting section 47b. The receiving section 47a is used to obtain the position information of the aircraft body. More specifically, the receiving section 47a receives a positioning signal from a positioning satellite and outputs the received positioning signal to a positioning unit 53. The positioning unit 53 uses the positioning signal from the receiving section 47a to obtain the position of the hydraulic excavator 1, for example, as information on latitude and longitude, and outputs it to the control device 52. Thereby, the control device 52 can obtain the position information of the aircraft body.

[0054] The transmitting section 47b is used for wireless communication with the outside of the aircraft body. More specifically, the transmitting section 47b is configured to be capable of wireless communication with an external server 100 located far from the aircraft body. In particular, the transmitting section 47b transmits the radio wave of the data output from the control device 52. That is, the antenna 47 is configured to be able to transmit radio waves. The output of data from the control device 52 to the transmitting section 47b is performed by a transmission data output section 52d of the control device 52. The transmission data output section 52d aggregates the information obtained by the control device 52 and outputs it to the transmitting section 47b as data to be transmitted to the external server 100. The above data includes, for example, the position information of the aircraft body.

[0055] The external server 100 is configured by, for example, a remote monitoring device. The external server 100 is configured to be able to store and output the transmitted data. The external server 100 outputs the data stored in the external server 100, for example, in response to a request from the administrator of the aircraft body. Thereby, the administrator of the aircraft body can utilize the data (information of the aircraft body) stored in the external server 100.

[0056] 〔4. Arrangement of Indicator Lights and Antenna〕 Next, the arrangement of the indicator light 45 and the antenna 47 will be described. FIG. 6 is a perspective view from the right rear showing an enlarged view of the vicinity of the indicator light 45. FIG. 7 is a perspective view showing an enlarged view of the mounting configuration of the indicator light 45. In FIG. 6, for the sake of convenience, the illustration of the cover covering the antenna 47 included in the antenna section 46 is omitted. The indicator light 45 is attached to the upper plate portion 43U of the machine room 43 via a mounting plate 61.

[0057] As shown in FIG. 7, the indicator lamp 45 has a plurality of screw portions 45a protruding downward on the lower surface portion. The mounting plate 61 is composed of a plate-shaped member made of metal extending in the front-rear direction. A plurality of mounting holes (not shown) penetrating in the vertical direction are provided in the mounting plate 61 at positions corresponding to the screw portions 45a.

[0058] When attaching the indicator lamp 45 to the mounting plate 61, the indicator lamp 45 is moved downward from above the mounting plate 61. At this time, it is moved while inserting the screw portion 45a into the above-described mounting hole. Then, the screw portion 45a and the nut N1 located below the mounting hole are screwed together. Thereby, the indicator lamp 45 is fixed to the mounting plate 61. Note that the above-described screwing means engaging and coupling a member having a male screw and a member having a female screw.

[0059] The mounting plate 61 is further provided with a first through hole 61a for attaching the mounting plate 61 to the upper swivel body 4 and a second through hole 61b for passing a cable (not shown) extending from the indicator lamp 45.

[0060] As shown in FIG. 6, the upper plate portion 43U is provided in the machine room 43 and is disposed above the machine room 43. The upper plate portion 43U is composed of a plate-shaped member made of metal extending in the left-right direction. More specifically, the upper plate portion 43U extends from the left side of the lower boom 31a to the right side of the lower boom 31a. Therefore, the right side of the upper plate portion 43U is located on the right side with respect to the lower boom 31a. A fixing portion (not shown) corresponding to the first through hole 61a of the mounting plate 61 is provided on the right side of the upper plate portion 43U. The above-described fixing portion is displaced to the right with respect to the lower boom 31a. By inserting the bolt B1 downward from above into the first through hole 61a and the fixing portion, the mounting plate 61 is fixed to the right side of the upper plate portion 43U. Therefore, the indicator lamp 45 is disposed on the right side of the upper plate portion 43U via the mounting plate 61. That is, the indicator lamp 45 is displaced and disposed on the other side in the left-right direction with respect to the working machine (lower boom 31a) (see also FIG. 3).

[0061] According to the above configuration, for the working machine (the lower boom 31a in this embodiment), the operation unit 44 is arranged on one side (the left side) in the left-right direction, and the indicator lamp 45 is arranged on the other side (the right side) in the left-right direction. That is, in the left-right direction of the machine body, the indicator lamp 45 can be arranged on the side opposite to the operation unit 44. Thereby, the indicator lamp 45 can be arranged at a position different from that of the operation unit 44. For example, as in this embodiment, the indicator lamp 45 can be installed at a position lower than the uppermost part of the operation unit 44. Therefore, the possibility that the indicator lamp 45 is located above the height restricted during the transportation of the machine body can be reduced.

[0062] Further, if the indicator lamp 45 is shifted and arranged on the other side in the left-right direction with respect to the working machine, for example, a ball-hanging operator who performs work in front of the machine body can visually recognize the indicator lamp 45 without being blocked by the working machine and the operation unit 44. In addition, the indicator lamp 45 can be compactly arranged beside the working machine, which is suitable for the small hydraulic excavator 1 with limited space on the machine body. As described above, with a configuration suitable for a small machine body, the indicator lamp 45 can be easily visually recognized from the front of the machine body, and the possibility that the indicator lamp 45 is located above the height restricted during transportation can be reduced.

[0063] The antenna 47 is arranged inside the antenna portion 46 located at the left rear of the indicator lamp 45. More specifically, the antenna portion 46 has a support bracket 62. The support bracket 62 includes a bottom plate 62a, a first standing plate 62b erected on the front side of the bottom plate 62a, and a second standing plate 62c erected on the left side of the bottom plate 62a. The bottom plate 62a, the first standing plate 62b, and the second standing plate 62c are each constituted by a plate-shaped member made of metal. The bottom plate 62a is connected to the upper plate portion 43U by a fastening member such as a bolt. Thereby, the antenna portion 46 is attached to the upper swing body 4.

[0064] A support plate 63 is connected to the rear surface of the first upright plate 62b and the right side surface of the second upright plate 62c by fastening members such as bolts. The support plate 63 is composed of a metal plate-like member extending in the horizontal direction. An antenna 47 is attached to the upper surface of the support plate 63. Below the support plate 63, a buzzer 48 is attached to the upper surface of the bottom plate 62a. The buzzer 48 sounds, for example, when the hydraulic excavator 1 moves backward.

[0065] It is desirable to arrange the buzzer 48 at a position where the sound emitted by the buzzer 48 can be reliably transmitted to workers or the like located around the machine body (especially at the rear). Specifically, the buzzer 48 is preferably arranged as close as possible to the rear end portion 4B of the upper swing body 4. Therefore, from the viewpoint of reliably securing an arrangement space for devices such as the buzzer 48 (devices that are preferably arranged close to the rear end portion 4B), as shown in FIG. 1, the indicator lamp 45 is preferably arranged in front of the rear end portion 4B of the upper swing body 4 (see also FIG. 9 described later).

[0066] A cover member C1 is arranged right in front of the indicator lamp 45. The cover member C1 is provided so as to be openable and closable with respect to an opening 43OP formed in the machine room 43. That is, the machine room 43 has the opening 43OP. Hereinafter, the configuration of the opening 43OP and the cover member C1 will be described.

[0067] First, the configuration of the opening 43OP will be described with reference to FIG. 8. FIG. 8 is a perspective view from the right front showing the configuration of the opening 43OP. In FIG. 8, for the purpose of clearly illustrating the configuration of the opening 43OP, illustration of devices (such as the above fuel tank) arranged inside the machine room 43, the swing frame 41, etc. is omitted. The opening 43OP includes a first edge portion E1, a second edge portion E2, a third edge portion E3, a fourth edge portion E4, and a fifth edge portion E5.

[0068] The first edge E1 is formed by the upper end of the tank cover TC and constitutes the front side of the opening 43OP. The second edge E2 is formed by a part of the upper end of the front right bonnet 43R1 and constitutes the right front side of the opening 43OP. The third edge E3 is formed by a part of the upper end of the rear right bonnet 43R2 and constitutes the right rear side of the opening 43OP. The fourth edge E4 is formed by a part of the right front end of the upper plate portion 43U and constitutes the rear side of the opening 43OP.

[0069] The fifth edge E5 is formed by a part of the curved plate portion 43C. The curved plate portion 43C is connected at the front end of the upper plate portion 43U at a position to the left of the fourth edge E4 and to the right of the lower boom 31a. The curved plate portion 43C is formed by bending a plate-like member made of metal extending in the front-rear direction downward as it goes forward. More specifically, the curved plate portion 43C is curved so as to bulge obliquely forward and upward. In particular, a part of the right end portion of the curved plate portion 43C constitutes the fifth edge E5. The fifth edge E5 constitutes the left side of the opening 43OP.

[0070] Also, the tank cover TC, the right bonnet 43R (front right bonnet 43R1, rear right bonnet 43R2), the right front end of the upper plate portion 43U, and the curved plate portion 43C are arranged to the right of the lower boom 31a. For this reason, the first edge E1, the second edge E2, the third edge E3, the fourth edge E4, and the fifth edge E5 are also located to the right of the lower boom 31a. Therefore, the opening 43OP is also located to the right of the lower boom 31a.

[0071] Through the opening 43OP, the operator accesses the equipment arranged inside the machine room 43. That is, the opening 43OP is used for access to the above equipment from the outside of the machine body. Also, below the opening 43OP, a tool box (not shown) for storing tools used for maintenance work is provided. Therefore, the opening 43OP is also used when taking out or putting back the above tools from the outside of the machine body.

[0072] If the opening 43OP is arranged on the side opposite to the operator's cab 44 with respect to the working machine (lower boom 31a), in order to secure the arrangement space for the opening 43OP, it is not necessary to narrow the arrangement space for the operator's cab 44 (reduce the size of the operator's cab 44). Therefore, from the perspective of providing the opening 43OP while securing the arrangement space for the operator's cab 44, as shown in FIG. 8, it is desirable that the opening 43OP is located on the other side (right side) in the left-right direction with respect to the working machine.

[0073] Next, the configuration of the cover member C1 will be described with reference to FIG. 9. FIG. 9 is a right side view of the upper swing body 4. In FIG. 9, the cover member C1 in the open state is illustrated by a dashed line.

[0074] The cover member C1 is composed of a resin-made hollow member extending in the front-rear direction. A hinge member C1a is provided on the rear side of the cover member C1. One side of the hinge member C1a is attached to the cover member C1, and the other side of the hinge member C1a is attached to the upper swing body 4, particularly near the fourth edge portion E4 (see FIG. 8). Thereby, the cover member C1 is rotatably supported with respect to the upper swing body 4 with the rear side as the rotation fulcrum.

[0075] When the cover member C1 is rotated upward from the closed state with the front side facing upward, the opening 43OP is exposed. Here, the closed state means a state (closed state) in which the lower end portion of the cover member C1 is in contact with each part of the tank cover TC, the front right bonnet 43R1, the rear right bonnet 43R2, the upper plate portion 43U (see FIG. 8), and the curved plate portion 43C (see FIG. 8). Note that the upward rotation of the front side of the cover member C1 is performed by lifting at least one of the front side, the left side, and the right side of the cover member C1 upward. On the other hand, when the front side of the cover member C1 is rotated downward from the state where the opening 43OP is exposed (open state), the cover member C1 covers the opening 43OP. Therefore, the cover member C1 is configured to be openable and closable with respect to the opening 43OP.

[0076] From the perspective of opening and closing the cover member C1 without being obstructed by the indicator light 45, as shown in FIG. 9, it is desirable that the indicator light 45 be arranged shifted rearward with respect to the cover member C1.

[0077] In a member extending in the front-rear direction, pivoting about the rear side as a pivot point for opening and closing is called "front opening". In contrast, pivoting about the front side as a pivot point for opening and closing is called "rear opening". Therefore, the cover member C1 of the present embodiment is configured as a front opening. However, the cover member C1 may be configured as a rear opening.

[0078] Regardless of whether the cover member C1 is configured as a front opening or a rear opening, from the perspective of avoiding interference between the cover member C1 and the indicator light 45, particularly when the cover member C1 is opened, the following configuration is desirable. That is, as shown in FIG. 3, it is desirable that the indicator light 45 be arranged on one side (left side) in the left-right direction with respect to the cover member C1.

[0079] For example, even if the cover member C1 is provided, from the perspective of making the indicator light 45 easily visible to the ball-hanging operator located in front of the machine body, the following configuration is desirable. That is, as shown in FIG. 3, it is desirable that the indicator light 45 be arranged between the work implement and the cover member C1 in a front view of the machine body (when the machine body is viewed from the front).

[0080] Here, the configuration of the canopy 44c will be described based on FIGS. 9, 10, and 11. FIG. 10 is a rear view of the upper swing body 4. FIG. 11 is a plan view of the upper swing body 4. In FIGS. 10 and 11, for convenience, the lower boom 31a is also shown. As described above, in FIGS. 10 and 11 as well, the lower boom 31a in the most pivoted state toward the rear is shown. The canopy 44c is configured to include a side wall SW and an upper wall UW. That is, the operation unit 44 has a side wall SW and an upper wall UW.

[0081] The side wall SW is disposed on the right side in the operation unit 44 (canopy 44c). More specifically, the side wall SW includes a first rear pillar SW1, a front pillar SW2, and a side surface portion SW3. The first rear pillar SW1 and the front pillar SW2 are each constituted by a columnar member made of metal extending in the vertical direction. The first rear pillar SW1 is disposed on the rear side of the operation unit 44 (canopy 44c). Also, the first rear pillar SW1 is disposed on the right side of the operation unit 44 (canopy 44c) (see particularly FIG. 10). In particular, the first rear pillar SW1 is disposed further to the right than the driver's seat 44a and the control member 44b. The lower end portion of the first rear pillar SW1 is connected to the upper plate portion 43U of the machine room 43 (see FIG. 6).

[0082] The front pillar SW2 is disposed on the front side of the operation unit 44 (canopy 44c). More specifically, the front pillar SW2 is arranged side by side with the first rear pillar SW1 in the front-rear direction. That is, the front pillar SW2 is also disposed on the right side of the operation unit 44 (canopy 44c). The lower end portion of the front pillar SW2 is connected to the floor of the operation unit 44 (not shown).

[0083] Between the first rear pillar SW1 and the front pillar SW2, the side surface portion SW3 is disposed. The side surface portion SW3 is constituted by a plate-like member made of metal extending in the front-rear direction. The front end portion of the side surface portion SW3 is connected to the front pillar SW2, and the rear end portion is connected to the first rear pillar SW1. A side window SW3a is provided in the side surface portion SW3.

[0084] As described above, the lower boom 31a is disposed adjacent to the right side of the operation unit 44. Therefore, the side wall SW is disposed adjacent to the working machine (lower boom 31a) (see particularly FIG. 10). With such a side wall SW provided in this arrangement, the right side of the driver's seat 44a is covered by the side wall SW, preventing contact between the operator seated on the driver's seat 44a and the working machine.

[0085] The upper wall UW is provided to extend leftward from the upper end of the side wall SW. The upper wall UW is composed of a plurality of types of metal members joined by welding or the like. The upper wall UW is located above the driver's seat 44a and the control member 44b and covers the upper side of the driver's seat 44a and the control member 44b.

[0086] Also, a second rear pillar PL is connected to the rear end of the upper wall UW. The second rear pillar PL is composed of a columnar member made of metal extending in the vertical direction. In particular, the upper end of the second rear pillar PL is connected to the rear end of the upper wall UW. The lower end of the second rear pillar PL is connected to the upper plate portion 43U of the machine room 43 (see FIG. 6). The second rear pillar PL is arranged to the left of the first rear pillar SW1.

[0087] Even when the operation unit 44 has the side wall SW, from the viewpoint of making the indicator lamp 45 easily visible to the ball-hanging operator or the like located in front of the aircraft body, the following configuration is desirable. That is, as shown in FIG. 9, it is desirable that the indicator lamp 45 be arranged at a position overlapping the side wall SW in a side view of the aircraft body (when the aircraft body is viewed from either the left or right side in the left-right direction).

[0088] From the viewpoint of achieving both ensuring the visibility of the indicator lamp 45 from the front of the aircraft body and reducing the interference of the radio wave transmitted from the antenna 47 to the operator to such an extent that the influence on the human body can be reduced, the following configuration is desirable. That is, as shown in FIG. 10, it is desirable that the antenna 47 be arranged between the indicator lamp 45 and the side wall SW in a rear view of the aircraft body (when the aircraft body is viewed from the rear).

[0089] From the viewpoint of effectively utilizing the dead space behind the work implement on the upper revolving body 4 while surely realizing the above arrangement of the antenna 47, the following configuration is desirable. That is, as shown in FIG. 11, with the work implement rotated most rearward, it is desirable that the antenna 47 be arranged at a position overlapping the work implement in a plan view of the aircraft body (when the aircraft body is viewed from above).

[0090] 〔5. Supplementary〕 In this embodiment, a case has been described where, in the left-right direction, the left side is defined as "one side in the left-right direction" and the right side is defined as "the other side in the left-right direction", but the present invention is not limited to this. For example, the right side may be defined as "one side in the left-right direction" and the left side may be defined as "the other side in the left-right direction". That is, the left and right may be arranged in the reverse order. Specifically, when the operation unit 44 is arranged on the right side of the machine body, the working machine may be arranged immediately to the left of the operation unit 44, and the indicator lamp 45 may be arranged shifted to the left with respect to the working machine. Even with this configuration, the effects of this embodiment described above can be obtained.

[0091] In this embodiment, a configuration has been described in which the lower boom 31a is used as the "working machine", but the present invention is not limited to this. For example, in the case of a boom that does not have an offset mechanism in the left-right direction, the entire boom or the entire working device may be used.

[0092] In this embodiment, a configuration has been described in which the indicator lamp 45 displays the stable state of the machine body during lifting work as information of the machine body, but the present invention is not limited to this. For example, the indicator lamp 45 may display the on / off state of the drive source (engine EG in this embodiment) as information of the machine body. Further, the indicator lamp 45 may display the wearing state of the seat belt provided on the driver's seat 44a (whether or not the operator sitting on the driver's seat 44a is wearing the seat belt) as information of the machine body. In these cases, the indicator lamp 45 may be configured to emit light of a single color.

[0093] In this embodiment, a configuration has been described in which the operation unit 44 has a canopy 44c, but instead of the canopy 44c, a configuration having a cabin may be used. Usually, a cabin has side walls on both the left side and the right side. Therefore, even with a configuration having a cabin instead of the canopy 44c, the effects of this embodiment can be obtained.

[0094] The hydraulic excavator 1 may have a configuration (for example, an electric excavator) in which a hydraulic pump is driven using an electric motor instead of the engine EG.

[0095] In this embodiment, the hydraulic excavator 1 is described as an example of a working machine. However, the working machine is not limited to the hydraulic excavator 1 and may be a construction machine such as a mobile crane. Further, the working machine may be an agricultural machine such as a combine harvester.

[0096] 〔6. Supplementary Note〕 The hydraulic excavator 1 described in this embodiment can also be expressed as a working machine shown in the following supplementary note.

[0097] The working machine of Supplementary Note (1) is a working implement, a driver's cab where the operation of the working implement is performed, and an indicator lamp for displaying information of the machine body, and is provided with the driver's cab is arranged on one side in the left - right direction of the machine body, the working implement is arranged adjacent to the driver's cab on the other side in the left - right direction of the machine body, the indicator lamp is arranged shifted to the other side in the left - right direction of the machine body with respect to the working implement.

[0098] The working machine of Supplementary Note (2) is the working machine described in Supplementary Note (1), and an opening located on the other side in the left - right direction of the machine body with respect to the working implement, and a machine room having a cover member that can be opened and closed with respect to the opening, and is provided with the indicator lamp is arranged shifted rearward with respect to the cover member.

[0099] The working machine of Supplementary Note (3) is the working machine described in Supplementary Note (2), and the indicator lamp is arranged on one side in the left - right direction of the machine body with respect to the cover member.

[0100] The working machine of Supplementary Note (4) is the working machine described in Supplementary Note (2) or (3), and the indicator lamp is arranged between the working implement and the cover member in a front view of the machine body.

[0101] The working machine of Supplementary Note (5) is the working machine according to any one of Supplementary Notes (1) to (4), comprising a revolving body on which the operation unit and the indicator lamp are arranged, and the indicator lamp is arranged in front of the rear end of the revolving body.

[0102] The working machine of Supplementary Note (6) is the working machine according to any one of Supplementary Notes (1) to (5), the operation unit has a side wall located adjacent to the working machine, and the indicator lamp is arranged at a position overlapping the side wall in a side view of the machine body.

[0103] The working machine of Supplementary Note (7) is the working machine according to Supplementary Note (6), comprising an antenna that transmits radio waves, and the antenna is arranged between the indicator lamp and the side wall in a rear view of the machine body.

[0104] The working machine of Supplementary Note (8) is the working machine according to Supplementary Note (7), the working machine is rotatably arranged in the front-rear direction of the machine body, and in a state where the working machine is rotated most rearward, the antenna is arranged at a position overlapping the working machine in a plan view of the machine body.

Industrial Applicability

[0105] The present invention can be applied to working machines such as construction machines and agricultural machines.

Explanation of Signs

[0106] 1 Hydraulic excavator (working machine, machine body) 4 Upper revolving body (revolving body) 4B Rear end 31a Lower boom (working machine) 43 Machine room 43OP Opening 44 Operation unit 45 Indicator lamp 47 Antenna C1 Cover member SW Side wall

Claims

1. An operating machine, a cab where the operation of the operating machine is performed, and an indicator light for displaying information of the machine body, and the cab is arranged on one side in the left - right direction of the machine body, the operating machine is arranged adjacent to the other side in the left - right direction of the machine body with respect to the cab, the indicator light is arranged shifted to the other side in the left - right direction of the machine body with respect to the operating machine, a working machine.

2. An opening located on the other side in the left - right direction of the machine body with respect to the operating machine, and a machine room having a cover member that can be opened and closed with respect to the opening, the indicator light is arranged shifted rearward with respect to the cover member, the working machine according to Claim 1.

3. The indicator light is arranged on one side in the left - right direction of the machine body with respect to the cover member, the working machine according to Claim 2.

4. The indicator light is arranged between the operating machine and the cover member in a front view of the machine body, the working machine according to Claim 2.

5. Comprising a swivel body where the cab and the indicator light are arranged, the indicator light is arranged in front of the rear end of the swivel body, the working machine according to Claim 1.

6. The cab has a side wall located adjacent to the operating machine, the indicator light is arranged at a position overlapping the side wall in a side view of the machine body, the working machine according to any one of Claims 1 to 5.

7. Comprising an antenna that emits radio waves, the antenna is arranged between the indicator light and the side wall in a rear view of the machine body, the working machine according to Claim 6.

8. The operating machine is arranged rotatably in the front - rear direction of the machine body, in a state where the operating machine is rotated most rearward, the antenna is arranged at a position overlapping the operating machine in a plan view of the machine body, the working machine according to Claim 7.

Images