Working machinery

Abstract

The present invention provides a work machine that reduces the risk of the operator's head coming into contact with the first support column while the operator is seated in the driver's seat and when the operator is getting on or off the machine, while also increasing the durability of the first support column. [Solution] The work machine comprises an upper body, a driver's seat located on one side, and a work machine located on the other side relative to the driver's seat. The work machine further comprises an upper body, a first support column erected behind the driver's seat and positioned opposite to the driver's seat; a second support column and a third support column erected on the upper body on the other side relative to the driver's seat and on one side relative to the work machine, positioned rearward and forward of the driver's seat, respectively; and a pillar positioned above the driver's seat and connected to the second and third support columns. A portion of the first support column is positioned offset rearward relative to the rear frame of the pillar.

Description

Technical Field

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

Background Art

[0002] Conventionally, a working machine having a configuration in which a working device is arranged on the side of a driver's seat and the upper part of the driver's seat is covered with a canopy is known. For example, Patent Document 1 discloses a canopy having three columns.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a configuration where the working device is arranged on the side of the driver's seat and the canopy has three columns, one column (conveniently referred to as the first column) is arranged behind the driver's seat, and the remaining two columns are arranged apart in the front - rear direction between the driver's seat and the working device. In such a canopy configuration, if the space between the driver's seat and the first column is narrow, for example, when an operator sits on the driver's seat and takes a reclined posture, or when the backrest part of the driver's seat is tilted backward, there is a risk that the operator's head may contact the first column.

[0005] Also, in a configuration where the first column is formed in a straight tubular shape in the vertical direction, for example, the strength of the first column is structurally weak. Therefore, the durability of the first column is likely to decrease. In this regard, in Patent Document 1, the upper part of the first column is inclined forward and connected to the side part of the roof frame. In this configuration, since the first column has a bending structure, it is considered that the strength of the first column can be structurally ensured. However, since the upper part of the first column is inclined forward, there is a risk that the operator's head may contact the upper part of the first column when the operator gets on and off.

[0006] The present invention was made to solve the above-mentioned problems, and its objective is to provide a work machine that reduces the risk of the operator's head coming into contact with the first support column when the operator is seated in the driver's seat and when the operator is getting on or off the machine, and also increases the durability of the first support column. [Means for solving the problem]

[0007] A working machine according to one aspect of the present invention comprises an upper body supported by a lower body, a driver's seat located on one side, and a working machine located on the other side relative to the driver's seat, wherein the upper body includes a first support column erected behind the driver's seat and positioned opposite to the driver's seat, and a second support column erected on the other side relative to the driver's seat and on the one side relative to the working machine, and positioned rearward and forward of the driver's seat, respectively. The vehicle comprises a third support column and a pillar positioned above the driver's seat and connected to the second and third support columns, wherein the pillar has a front frame extending from above the third support column to one side, a rear frame extending from above the second support column to one side and connected to the first support column, and a side frame connecting the front frame and the rear frame through one side of the driver's seat, and a part of the first support column is positioned offset rearward relative to the rear frame. [Effects of the Invention]

[0008] With the above configuration, the risk of the operator's head coming into contact with the first support column can be reduced both when the operator is seated in the driver's seat and when the operator is getting in or out of the vehicle, and the durability of the first support column can be increased. [Brief explanation of the drawing]

[0009] [Figure 1]This is a left side view showing a schematic configuration of a hydraulic excavator, which is an example of a work machine of the present invention. [Figure 2] This is a perspective view of the upper rotating body of the hydraulic excavator shown above, viewed from a diagonal rearward angle. [Figure 3] This is a rear view of the upper rotating body shown above. [Figure 4] This is a perspective view of the upper rotating body shown above, taken from a diagonal front angle. [Figure 5] This is a plan view of the upper rotating body shown above. [Figure 6] This is a plan view of the upper rotating body shown in Figure 5, with the roof section omitted. [Figure 7] This is a side view of the canopy of the hydraulic excavator shown above, as seen from the left. [Figure 8] This is a plan view showing a magnified view of the canopy mentioned above. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described below with reference to the drawings.

[0011] [1. Outline configuration of the work machine] Figure 1 is a left side view showing a schematic configuration of a hydraulic excavator 1, which is an example of a work machine according to one embodiment of the present invention. The hydraulic excavator 1 comprises a lower traveling body 2, a work machine 3, and an upper rotating body 4.

[0012] In this embodiment, directions are defined as follows: The direction in which the operator (driver, operator) seated in the driver's seat 44a located in the driver's section 44 of the upper slewing body 4 faces forward is defined as "front," and the opposite direction is defined as "rear." When the upper slewing body 4 is not slewing relative to the lower traveling body 2 (slewing angle 0 degrees), the front-rear direction of the upper slewing body 4 coincides with the front-rear direction of the lower traveling body 2. The drawing shows the hydraulic excavator 1 in the state where the upper slewing body 4 is not slewing relative to the lower traveling body 2. Also, the left side as seen from the perspective of the operator seated in the driver's seat 44a is defined as "left," and the right side as "right." Furthermore, the direction of gravity perpendicular to the front-rear and left-right directions is defined as the up-down direction, with the upstream side of the direction of gravity being defined as "up," and the downstream side as "down." In the drawing, the forward direction 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," as needed.

[0013] (1-1. Lower running body) The lower travel body 2 comprises a pair of left and right crawlers 21, a pair of left and right travel motors 22, and a blade 23. The left and right travel motors 22 drive the left and right crawlers 21 respectively, allowing the hydraulic excavator 1 to move forward and backward. The travel motors 22 are hydraulic motors. The blade 23, which performs leveling work, is located on the front side of the lower travel body 2. The blade 23 is rotated by a blade cylinder (not shown). The blade cylinder is a hydraulic cylinder.

[0014] (1-2. Work equipment) The work machine 3 comprises a boom 31, an arm 32, and a bucket 33. By independently driving the boom 31, arm 32, and bucket 33, excavation work of soil and other materials can be performed.

[0015] The boom 31 has a lower boom 31a, an upper boom 31b, and an arm stay 31c. The base end portion of the lower boom 31a is connected to the right front portion 4a (see FIGS. 5 and 6) of the upper revolving body 4 so as to be rotatable in the vertical direction and the front-rear direction. The tip end portion of the lower boom 31a is connected to the tip end portion of a boom cylinder (not shown). The base end portion of the boom cylinder is connected to the right front portion 4a of the upper revolving body 4. More specifically, the boom cylinder is disposed forward of the lower boom 31a. The boom cylinder is movably extendable and retractable. When the boom cylinder extends and retracts, the lower boom 31a rotates in the vertical direction and the front-rear direction with respect to the upper revolving body 4.

[0016] The base end portion of the upper boom 31b is 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 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 an 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 extendable and retractable. 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.

[0017] When the offset cylinder 31b1 extends and retracts, 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. Thereby, the arm stay 31c moves in the left-right direction without rotating in the left-right direction with respect to the lower boom 31a.

[0018] The base end portion of the arm 32 is 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 extendable and retractable. When the arm cylinder 32a extends and retracts, the arm 32 rotates in the vertical and front-rear directions with respect to the arm stay 31c.

[0019] The bucket 33 is 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 the bucket link 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 bucket link 34. The bucket cylinder 33a is movably extendable and retractable. When the bucket cylinder 33a extends and retracts, the bucket 33 rotates in the vertical and front-rear directions with respect to the arm 32.

[0020] The boom cylinder, the offset cylinder 31b1, the arm cylinder 32a, and the bucket cylinder 33a are constituted by hydraulic cylinders.

[0021] (1-3. Upper Swing Body) 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 is an upper body supported by the lower traveling body 2 as a lower body. The upper swing body 4 includes a swing frame 41, a swing motor 42, a machine room 43, and an operation unit 44.

[0022] The upper swing body 4 swings via the above swing bearing by the drive of the swing motor 42 arranged on the swing frame 41. The swing motor 42 is constituted by a hydraulic motor.

[0023] The engine EG is housed in the machine room 43. The engine EG is the prime mover that powers the hydraulic excavator 1. The engine EG is composed of a diesel engine, but is not limited to this; for example, it may be composed of a gasoline engine. The engine EG is mounted on the slewing frame 41, which is the base plate.

[0024] The machine room 43 houses the engine EG and a hydraulic pump (not shown). The hydraulic pump supplies hydraulic fluid (pressurized oil) to the hydraulic motors and hydraulic cylinders. The hydraulic motors include, for example, the left and right travel motors 22 and the slewing motor 42. The hydraulic cylinders include, for example, the blade cylinder, boom cylinder, offset cylinder 31b1, arm cylinder 32a, and bucket cylinder 33a. The hydraulic motors and hydraulic cylinders driven by hydraulic fluid are collectively called hydraulic actuators.

[0025] The driver's unit 44 is located on the upper left side of the upper slewing body 4. More specifically, the driver's unit 44 is located to the left of the work machine 3. As shown in Figure 1, the driver's unit 44 is provided with a driver's seat 44a. Multiple control members 44b are arranged around the driver's seat 44a. The multiple control members 44b consist of levers, switches, pedals, etc. When the operator sits in the driver's seat 44a and operates the multiple control members 44b, the hydraulic actuator is driven. This enables the lower traveling body 2 to travel, the blade 23 to perform leveling work, the work machine 3 to perform excavation work, the upper slewing body 4 to rotate, and so on.

[0026] In this embodiment, the left side, which is one side in the left-right direction, is also referred to as the "one-sided side," and the right side, which is the other side, is also referred to as the "other-sided side." In this case, the driver's seat 44a of the driver's unit 44 is located on the one-sided side of the upper rotating body 4, and the work equipment 3 is located on the other-sided side relative to the driver's seat 44a. In other words, the hydraulic excavator 1 of this embodiment comprises a driver's seat 44a located on one-sided side of the upper rotating body 4 as the upper body, and a work equipment 3 located on the other-sided side relative to the driver's seat 44a.

[0027] <1-3-1. Details of the driver's unit> Figure 2 is a perspective view of the upper rotating body 4 from the rear at an angle. Figure 3 is a rear view of the upper rotating body 4. Figure 4 is a perspective view of the upper rotating body 4 from the front at an angle. Figure 5 is a plan view of the upper rotating body 4. Figure 6 is a plan view of the upper rotating body 4 with the roof section 104 shown in Figure 5 omitted. Note that, for convenience, the working machine 3 shown in Figure 1 is omitted in Figures 2 to 6.

[0028] The driver's seat 44a of the upper rotating body 4 is supported from below by a seat support base 43S (see Figure 7). The seat support base 43S is constructed by connecting multiple metal plates in a stepped manner from the front lower part to the rear upper part of the driver's seat 44a. The seat support base 43S covers the engine EG shown in Figure 1 from above.

[0029] As shown in Figures 2, 3, and 6, the driver's unit 44 is provided with the following control members 44b: a right operation lever 44b1, a left operation lever 44b2, a function limiting lever 44b3, a pair of travel levers 44b4, and a pedal 44b5.

[0030] The right operating lever 44b1 is located to the right of the driver's seat 44a. The left operating lever 44b2 and the function limiting lever 44b3 are located to the left of the driver's seat 44a. The function limiting lever 44b3 is a lever for switching the drive of the hydraulic actuator on and off and is provided to limit the function of the hydraulic actuator as needed. A pair of travel levers 44b4 and pedals 44b5 are located in front of the driver's seat 44a.

[0031] As shown in Figures 2, 4, and 6, a monitor 60 is located in the driver's unit 44. The monitor 60 is a display device that shows various information. For example, the monitor 60 displays various settings for the hydraulic excavator 1, fuel level, hour meter, and, if a surveillance camera is installed, images captured by the surveillance camera. The monitor 60 is supported by stays or the like on the right frame 108a of the canopy 100 (see Figures 1 and 7). The right frame 108a is a frame that runs along the upper edge of the right side wall portion 108 of the canopy 100 and extends diagonally upward from the front to the rear.

[0032] <1-3-2. External Configuration of the Machine Room> As shown in Figures 2, 3, 5, and 6, on the seat support base 43S, a communication unit 43a is positioned to the right of the second support column 102 of the canopy 100, which will be described later. The communication unit 43a includes an antenna and a positioning unit and is provided for communication with the outside and measurement of the vehicle's position. Further to the right of the communication unit 43a on the seat support base 43S, a lamp 43b is provided. The lamp 43b lights up when the hydraulic excavator 1 is in operation or when warning the surroundings, to draw attention to the surroundings. Further to the right of the lamp 43b on the seat support base 43S, an opening / closing cover 43c is connected so as to open forward and rotate vertically. By rotating the opening / closing cover 43c upward and opening it, it becomes possible to access, for example, the internal fuel tank and refuel the fuel tank.

[0033] The machine room 43 is provided with a right-side cover 43R, a rear cover 43B, a left-side cover 43L, and a lower left cover 43LU. The right-side cover 43R is a cover member that forms the right-side wall of the machine room 43. The right-side cover 43R is provided with an opening 43Rp (see Figure 3). The opening 43Rp is provided to allow air to circulate between the inside and outside of the machine room 43. By directing this air onto a heat exchanger (not shown) located inside the machine room 43, the cooling water passing through the heat exchanger can be cooled, thereby cooling the engine EG. As a safety measure, for example, a mesh-like guard may be provided at the opening 43Rp, but the shape of the guard is not limited to a mesh shape.

[0034] The rear cover 43B is a cover member that forms the rear wall of the machine room 43. A counterweight 43W is attached below the rear cover 43B to balance the weight with the work machine 3. The left side cover 43L is a cover member that forms the left side wall of the machine room 43. The lower left cover 43LU is a cover member that forms the side wall below the left side cover 43L. The right side cover 43R, the left side cover 43L, and the lower left cover 43LU are detachably attached to the machine room 43 by bolts or the like. The rear cover 43B is rotatably attached to the rear of the machine room 43, for example, by opening to the right, but it may also be detachably attached by bolts or the like.

[0035] [2. Regarding the canopy] As shown in Figures 1 to 6, a canopy 100 is provided on the upper rotating body 4. The canopy 100 is positioned to cover the area above the driver's seat 44a. The configuration of the canopy 100 will be described below.

[0036] (2-1. Overview of the canopy) The canopy 100 has three support columns. That is, the canopy 100 is composed of a three-column canopy. More specifically, the canopy 100 includes a first support column 101, a second support column 102, and a third support column 103. The first support column 101, the second support column 102, and the third support column 103 are made of, for example, hollow metal pipes, but may also be made of solid rod-shaped bodies.

[0037] As shown in Figure 3, the first support column 101 is erected behind the driver's seat 44a and to the left of the seat support base 43S. In other words, the first support column 101 is erected behind the driver's seat 44a in the upper rotating body 4 and is positioned opposite the driver's seat 44a (in the front-rear direction). Further details of the first support column 101 will be described later.

[0038] The second support column 102 is erected to the right of the first support column 101 on the seat support base 43S. The third support column 103 is erected to the right front of the driver's seat 44a on the floor 44F of the driver's compartment 44 (see Figures 2 and 4). As a result, the third support column 103 is positioned in front of the second support column 102. The second support column 102 and the third support column 103 are positioned between the driver's seat 44a and the work machine 3 (see Figure 1) in the left-right direction.

[0039] In other words, the second support column 102 is erected on the upper slewing body 4 on the other side of the driver's seat 44a and on the one side of the work equipment 3, and is positioned behind the driver's seat 44a. The third support column 103 is erected on the upper slewing body 4 on the other side of the driver's seat 44a and on the one side of the work equipment 3, and is positioned in front of the driver's seat 44a.

[0040] As shown in Figures 1, 2, 4, and 5, the canopy 100 further includes a roof section 104. The roof section 104 is a top plate that covers the area above the driver's seat 44a and is supported by pillars 105 on the first support 101, the second support 102, and the third support 103. The pillars 105 extend along the front edge 104F, the left edge 104L, and the rear edge 104B of the roof section 104 and are connected to them. More specifically, one end of the pillar 105 is connected to the upper end of the third support 103. From the aforementioned end (the end connected to the third support 103), the pillar 105 extends to the left along the front edge 104F, then to the rear along the left edge 104L, and then to the right along the rear edge 104B, where it is connected to the upper end of the second support 102. In other words, pillar 105 is connected to the second support column 102 and the third support column 103. Pillar 105 is made of, for example, a hollow metal pipe, but may also be made of a solid rod-shaped body.

[0041] The pillar 105 is positioned above the driver's seat 44a. The pillar 105 has a front frame 105F, a rear frame 105B, and a side frame 105L.

[0042] As shown in Figure 4, the front frame 105F curves to the left as it goes upward from the upper end of the third support column 103, and then extends to the left along the leading edge 104F of the roof section 104 (see Figure 5, etc.). In other words, the front frame 105F extends to one side from above the third support column 103. The rear frame 105B curves to the left as it goes upward from the upper end of the second support column 102, and then extends to the left along the trailing edge 104R of the roof section 104 (see Figure 5, etc.). In other words, the rear frame 105B extends to one side from above the second support column 102. The first support column 101 (particularly the second inclined section 101b, which will be described later) is connected to the rear frame 105B.

[0043] As shown in Figure 6, the side frame 105L is positioned to the left of the driver's seat 44a in a plan view. The front end of the side frame 105L is connected to the left end of the front frame 105F. The rear end of the side frame 105L is connected to the left end of the rear frame 105B. In other words, the side frame 105L connects the front frame 105F and the rear frame 105B by passing along one side of the driver's seat 44a.

[0044] The side frame 105L and the front frame 105F are connected by welding or the like. The side frame 105L and the rear frame 105B are also connected by welding or the like. The front frame 105F, side frame 105L, and rear frame 105B may be constructed integrally (for example, from a single continuous pipe).

[0045] As described above, the hydraulic excavator 1 of this embodiment includes the first support column 101, the second support column 102, the third support column 103, and the pillar 105. The second support column 102, the third support column 103, and the pillar 105 may be constructed integrally (for example, as a single continuous pipe).

[0046] A skylight 104a is provided in the roof section 104. The skylight 104a is made of, for example, a transparent material. The transparent material is made of, for example, resin (e.g., polycarbonate), but may also be made of glass. The operator seated in the driver's seat 44a can see upwards through the skylight 104a. This allows the operator to visually confirm the posture and operation of, for example, the work equipment 3 (see Figure 1) located to the right of the driver's seat 44.

[0047] As shown in Figures 1, 2, and 4, the canopy 100 is further provided with a right window 106. The right window 106 is positioned between the third support column 103 and the second support column 102 and is supported by the third support column 103 and the second support column 102 via a window frame portion 106a. The right window 106 is made of, for example, a transparent material. The transparent material is made of resin or glass, similar to the skylight 104a. The operator seated in the driver's seat 44a can see to the right through the right window 106.

[0048] Two guide frames 107 are provided to the left of the right window 106. The two guide frames 107 are spanned in the front-to-back direction between the third support column 103 and the second support column 102, and are positioned apart in the vertical direction. Each guide frame 107 is provided for the purpose of reinforcing the canopy 100 and ensuring the safety of the operator. For example, even if the hydraulic excavator 1 were to tip over, each guide frame 107 would prevent the operator from being thrown through the right window 106 to the right side (towards the work machine 3). Note that the number of guide frames 107 is not limited to the two mentioned above; there may be one or three or more.

[0049] As shown in Figure 4, each guide frame 107 is fitted with a retaining member 107a. The retaining member 107a is made of an elastic material such as rubber. The retaining member 107a is positioned in contact with the right window 106 and presses the right window 106 to the right. As a result, vibrations (flapping) of the right window 106 caused by the engine EG are suppressed by the retaining member 107a.

[0050] Furthermore, a handrail frame 107b is provided in front of the upper and lower guide frames 107. The handrail frame 107b is provided so as to span across the upper and lower guide frames 107. The operator can sit down or stand up from the driver's seat 44a carefully by gripping the handrail frame 107b when doing so.

[0051] Below the right window 106, a right-side wall section 108 (see Figure 1) is positioned. The right-side wall section 108 separates the driver's seat 44a from the work equipment 3.

[0052] (2-2. Details of the first support post) Next, the details of the first support column 101 of the canopy 100 described above will be explained with reference to Figures 7 and 8. Figure 7 is a side view of the canopy 100 as seen from the left. Figure 8 is a plan view showing an enlarged view of the canopy 100. The first support column 101 of the canopy 100 has a first inclined portion 101a, a second inclined portion 101b, and a main body portion 101c.

[0053] The first inclined section 101a extends diagonally upward from the lower end 101D of the first support column 101 as it moves towards the rear. Here, the lower end 101D of the first support column 101 refers to the portion of the first support column 101 that is supported by the seat support base 43S. The second inclined section 101b extends diagonally downward from the upper end 101U as it moves towards the rear. Here, the upper end 101U of the first support column 101 refers to the portion of the first support column 101 that is connected to the rear frame 105B. The main body section 101c connects the first inclined section 101a and the second inclined section 101b. More specifically, the main body section 101c extends from bottom to top. The lower end 101c1 of the main body section 101c, located at the bottom of the main body section 101c, is connected to the first upper end 101a1, located at the top of the first inclined section 101a. The upper end portion 101c2 of the main body, located at the upper end of the main body portion 101c, is connected to the second lower end portion 101b1, located at the lower end of the second inclined portion 101b.

[0054] The first support column 101 is composed of a single component that integrates, for example, a first inclined portion 101a, a main body portion 101c, and a second inclined portion 101b. Alternatively, the first support column 101 may be constructed by connecting the first inclined portion 101a, the main body portion 101c, and the second inclined portion 101b, which are made of separate components, by welding or other means.

[0055] As the main body portion 101c is connected to the first inclined portion 101a and the second inclined portion 101b, the main body portion 101c is positioned offset rearward relative to the rear frame 105B to which the second inclined portion 101b is connected, as shown in Figures 7 and 8. For example, as shown in Figure 7, when the position of the rear end of the rear frame 105B is P, in this embodiment the main body portion 101c is positioned overlapping position P in the front-rear direction. The main body portion 101c may also be positioned further rearward than position P. The amount of rearward offset of the main body portion 101c relative to the rear frame 105B can be adjusted by appropriately setting the inclination direction (angle of inclination relative to the vertical direction) of the first inclined portion 101a and the second inclined portion 101b, and the vertical length of the main body portion 101c.

[0056] In this way, by positioning the main body portion 101c of the first support column 101 to be shifted rearward relative to the rear frame 105B, a portion of the first support column 101 is positioned to be shifted rearward relative to the rear frame 105B. This provides the following effects.

[0057] In the configuration in which a portion of the first support column 101 is positioned offset rearward relative to the rear frame 105B, the space between the driver's seat 44a and the first support column 101 can be increased in the front-to-back direction compared to, for example, a configuration in which the first support column 101 extends straight upward behind the driver's seat 44a. This reduces the risk of the operator's head coming into contact with the first support column 101 even when the operator is seated in the driver's seat 44a and adopts a posture in which their head is moved backward. The backward movement of the operator's head can occur, for example, by leaning back without reclining while seated (bending the upper body backward and puffing out the chest), or by reclining while seated and tilting the upper body backward. Reclining refers to tilting the backrest portion 44a1 of the driver's seat 44a backward.

[0058] Furthermore, in a configuration where a portion of the first support column 101 is positioned offset rearward relative to the rear frame 105B, the first support column 101 bends in the front-rear direction. In other words, the first support column 101 has a bent structure. This increases the strength of the first support column 101 (compared to, for example, the case where the first support column 101 has a straight pipe structure). Therefore, the durability of the first support column 101 can be increased, and this also increases the durability of the pillar 105 connected to the first support column 101, and the second support columns 102 and third support columns 103 connected to the pillar 105. In other words, the durability of the entire canopy 100 can be increased.

[0059] Furthermore, the first support column 101 is connected to the rear frame 105B and not to the side frame 105L that passes along one side of the driver's seat 44a. Therefore, the first support column 101 does not cross the side of the driver's seat 44a (the side on which the operator enters and exits the driver's compartment 44). This significantly reduces the risk of the operator's head coming into contact with the first support column 101 when the operator enters or exits the driver's compartment 44 from one side (the left side).

[0060] In other words, according to the configuration of this embodiment, the risk of the operator's head coming into contact with the first support column 101 is reduced when the operator is seated in the driver's seat 44a and when the operator is getting on or off the vehicle, and the durability of the first support column 101 can be increased.

[0061] In particular, from the viewpoint of easily realizing an arrangement in which a part of the first support column 101 is shifted rearward relative to the rear frame 105B, it is desirable that the first support column 101 has the following configuration. That is, it is desirable that the first support column 101 has the above-mentioned first inclined portion 101a, second inclined portion 101b, and main body portion 101c. In addition, it is desirable that the main body portion 101c is positioned shifted rearward relative to the rear frame 105B.

[0062] As shown in Figure 7, both the main body 101c and the second support column 102 extend in the vertical direction. That is, the main body 101c is positioned parallel to the second support column 102. The main body 101c may be positioned at an angle to the second support column 102 when viewed from the side, but in order to firmly support the pillar 105 in the vertical direction, it is desirable that the first support column 101 has a portion that is aligned with the direction in which the second support column 102 extends (vertical direction). From this viewpoint, it is desirable that the main body 101c, which constitutes a part of the first support column 101, be positioned parallel to the second support column 102.

[0063] Furthermore, in order to reliably realize a configuration in which a part of the first support column 101 (main body portion 101c) is positioned offset to the rear with respect to the rear frame 105B which extends from above the second support column 102 to one side, it is desirable that the main body portion 101c be positioned as follows in relation to the second support column 102 to which the rear frame 105B is connected. In other words, as shown in Figure 7, it is desirable that the main body portion 101c be positioned offset to the rear with respect to the second support column 102 when viewed from the side.

[0064] From the viewpoint of reducing the risk of the main body portion 101c of the first support column 101 coming into contact with surrounding obstacles when the upper slewing body 4 is slewing, it is desirable that the main body portion 101c not protrude rearward from the rear wall portion 4B of the upper slewing body 4 in a plan view, as shown in Figure 5, that is, on the opposite side from the pivot center CR. In other words, it is desirable that the main body portion 101c be positioned in front of the rear wall portion 4B of the upper slewing body 4 (towards the driver's seat 44a and the pivot center CR). The rear wall portion 4B includes at least one of the rear cover 43B and the counterweight 43W described above.

[0065] (2-3. Regarding beam members) As shown in Figures 7 and 8, the canopy 100 further includes a beam member 109. The beam member 109 is made of a hollow pipe or a solid rod and is connected to the first support column 101 and the second support column 102 by welding or the like. As a result, the beam member 109 spans the first support column 101 and the second support column 102 in a direction that intersects the left-right direction in a plan view (see Figure 8 in particular). The hydraulic excavator 1 is equipped with such a beam member 109. In this way, the canopy 100 is reinforced by connecting the first support column 101 and the second support column 102 via the beam member 109. Therefore, the overall durability of the canopy 100 is further increased compared to a configuration in which the beam member 109 is omitted. Even in a configuration in which the beam member 109 is omitted, the above-described configuration (bending structure) of the first support column 101 provides the effect of increasing the overall durability of the canopy 100.

[0066] The beam member 109 may be connected to any of the first inclined portion 101a, the second inclined portion 101b, or the main body portion 101c of the first support column 101. In this embodiment, the beam member 109 is connected to the main body portion 101c of the first support column 101. Therefore, the beam member 109 spans the main body portion 101c of the first support column 101 and the second support column 102. In this configuration, the beam member 109 spans the first support column 101 and the second support column 102 at a predetermined height position (any position in the vertical direction of the main body portion 101c), thus reinforcing the canopy 100 in a balanced manner.

[0067] As shown in Figure 8, the beam member 109 is positioned at an angle to the rear frame 105B in a plan view. In Figure 8, the direction in which the beam member 109 is inclined relative to the rear frame 105B is indicated by D2. The inclination angle of the beam member 109 with respect to the rear frame 105B is set according to the amount of rearward displacement of the main body portion 101c of the first support column 101 relative to the rear frame 105B. In this configuration, the strength in the canopy 100 in the D2 direction in which the beam member 109 extends is increased. Therefore, the effect of increasing the durability of the canopy 100 is further enhanced.

[0068] In this embodiment, as shown in Figure 3, the beam member 109 extends horizontally from the first support column 101 toward the second support column 102. As a result, the beam member 109 is positioned perpendicular to the first support column 101 and the second support column 102. The beam member 109 may also extend diagonally upward or diagonally downward from the first support column 101 toward the second support column 102. In other words, the beam member 109 may be positioned at an inclination with respect to the first support column 101 and the second support column 102.

[0069] (2-4. Regarding the side frame) Next, we will provide further explanation regarding the side frame 105L of the pillar 105 described above. As shown in Figures 5, 6, and 8, the side frame 105L has a first side frame 105L1 and a second side frame 105L2. The first side frame 105L1 is connected to the front frame 105F (especially the left end). The second side frame 105L2 connects the first side frame 105L1 (especially the rear end) and the rear frame 105B (especially the left end).

[0070] As shown in Figure 8, the first side frame 105L1 is positioned inclined with respect to the front-rear direction such that its rear side (the side connected to the second side frame 105L2) is located one side to the left (left) of its front side (the side connected to the front frame 105F). On the other hand, the second side frame 105L2 is positioned inclined with respect to the front-rear direction such that its rear side (the side connected to the rear frame 105B) is located on the other side of its front side (the side connected to the first side frame 105L1). Therefore, in Figure 8, when the direction in which the first side frame 105L1 extends is denoted as EL, the second side frame 105L2 is positioned inclined to the other side (right) of the EL direction in a plan view. In other words, in a plan view, the second side frame 105L2 is positioned inclined toward the main body 101c side (the side approaching the main body 101c) relative to the first side frame 105L1.

[0071] In this configuration, the side frame 105L, including the first side frame 105L1 and the second side frame 105L2, has a bent shape. This increases the strength of the side frame 105L. Furthermore, it is possible to position the side frame 105L on one side relative to the driver's seat 44a (see Figure 6, etc.) while positioning the side frame 105L within the turning radius of the upper rotating body 4. This reduces the risk of the side frame 105L coming into contact with surrounding obstacles when the upper rotating body 4 is rotating.

[0072] (2-5. Regarding the rear frame) As shown in Figure 6, the rear frame 105B of the pillar 105 is positioned parallel to the D1 direction (for example, the left-right direction) in a plan view, where the lower end 101D of the first support column 101 and the lower end 102D of the second support column 102 are aligned. This is for the following reasons.

[0073] When installing the canopy 100 on the upper rotating body 4, first, the first support column 101 and the second support column 102 are erected on the upper rotating body 4 (especially the seat support base 43S) so that the lower ends 101D of the first support column 101 and the lower end 102D of the second support column 102 are aligned in the left-right direction. Then, the rear frame 105B, which is connected to the second support column 102, is positioned extending to the left. In this case, the rear frame 105B passes directly above the lower end 101D of the first support column 101. This makes it easy to connect the upper end 101U (see Figure 7) of the first support column 101 to the rear frame 105B. Consequently, the assembly of the canopy 100 becomes easier. If the ease of assembly of the canopy 100 does not need to be considered, the rear frame 105B may be positioned at an angle to the D1 direction in a plan view.

[0074] [3. Supplement] In this embodiment, an example was described in which the driver's unit 44 and canopy 100 are located on the left side of the upper rotating body 4, and the work implement 3 is located on the right side. However, the relative positions of these components may be reversed left and right. In this case, one side in the left-right direction becomes the "right side," and the other side becomes the "left side."

[0075] Hydraulic excavator 1 is configured to be equipped with an engine EG (see Figure 1) as the prime mover, but the prime mover may also be an electric motor.

[0076] The hydraulic excavator 1 may be configured to use both hydraulic equipment such as hydraulic actuators (e.g., hydraulic motors, hydraulic cylinders) and electrically driven actuators. Examples of electrically driven actuators include electric travel motors, electric cylinders, and electric slewing motors.

[0077] In this embodiment, a hydraulic excavator 1 was used as an example of the working machine, but the working machine is not limited to a hydraulic excavator 1 and may be construction machinery such as a mobile crane. Furthermore, the working machine may be agricultural machinery such as a combine harvester or tractor. In addition, the working machine may have a configuration in which the upper body does not rotate relative to the lower body.

[0078] [4. Addendum] The work machine (hydraulic excavator 1) described in this embodiment can be described as follows:

[0079] The work machines mentioned in Appendix (1) are: A work machine comprising an upper body supported by a lower body, an operator's seat located on one side, and a work machine located on the other side relative to the operator's seat, The upper body includes a first support column erected behind the driver's seat and positioned opposite the driver's seat, The upper body includes a second support column and a third support column, which are erected on the other side relative to the driver's seat and on the one side relative to the work machine, and are positioned rearward and forward of the driver's seat, respectively. It comprises a pillar positioned above the driver's seat and connected to the second and third support columns, The aforementioned pillar is A front frame extending from above the third support column to one side, A rear frame extending from above the second support column to one side and connected to the first support column, It has a side frame that passes through one side of the driver's seat and connects the front frame and the rear frame, A portion of the first support column is positioned offset to the rear of the rear frame.

[0080] The work machines in Appendix (2) are the work machines described in Appendix (1), The first support column is, A first inclined section that extends diagonally upward from the lower end towards the rear, A second inclined section that extends diagonally downward from the upper end towards the rear, It has a main body portion that connects the first inclined portion and the second inclined portion.

[0081] The work machines in Appendix (3) are the work machines described in Appendix (2), The main body is positioned offset to the rear of the rear frame.

[0082] The work machines in Appendix (4) are the work machines described in Appendix (2) or (3), The main body is positioned parallel to the second support column.

[0083] The work machine in Appendix (5) is the work machine described in any of Appendix (2) to (4), The main body is positioned, when viewed from the side, offset rearward from the second support column.

[0084] The work machine in Appendix (6) is the work machine described in any of Appendix (2) to (5), The main body is positioned in front of the rear wall of the upper body.

[0085] The work machine in Appendix (7) is the work machine described in any of Appendix (2) to (6), The structure further includes a beam member that spans the first support column and the second support column.

[0086] The work machines specified in Appendix (8) are the work machines described in Appendix (7), The beam member spans the main body of the first support column and the second support column.

[0087] The work machine in Appendix (9) is the work machine described in either Appendix (7) or (8), The beam member is positioned at an inclination with respect to the rear frame in a plan view.

[0088] The work machine in Appendix (10) is the work machine described in any of Appendix (2) to (9), The aforementioned side frame is, A first side frame connected to the aforementioned front frame, It has a second side frame that connects the first side frame and the rear frame, In a plan view, the second side frame is positioned at an inclination toward the main body portion relative to the first side frame.

[0089] The work machine in Appendix (11) is the work machine described in any of Appendix (1) to (10), The rear frame is positioned parallel to the direction in which the lower end of the first support column and the lower end of the second support column are aligned when viewed from above.

[0090] Although embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it can be expanded or modified without departing from the spirit of the invention. [Industrial applicability]

[0091] This invention can be used, for example, in work machinery such as construction machinery and agricultural machinery. [Explanation of symbols]

[0092] 1. Hydraulic excavator (working machine) 2. Lower running body (lower body) 3. Work equipment 4. Upper rotating body (upper body) 4B Back wall 43B Rear cover (rear wall section) 43S Seat support stand 43W Counterweight (rear wall section) 44a Driver's seat 100 Canopy 101 1st pillar 101D Lower end (lower end of the first support column) 101U Upper end (upper end of the first support column) 101a 1st slope part 101b 2nd slope 101c Main body 102 Second pillar 102D Lower end (lower end of the second support column) 103 3rd pillar 105 Pillar 105B Rear Frame 105F Front Frame 105L Side Frame 105L1 First side frame 105L2 Second side frame 109 Beam members

Claims

1. A work machine comprising an upper body supported by a lower body, an operator's seat located on one side, and a work machine located on the other side relative to the operator's seat, The upper body includes a first support column erected behind the driver's seat and positioned opposite the driver's seat, The upper body includes a second support column and a third support column, which are erected on the other side relative to the driver's seat and on the one side relative to the work machine, and are positioned rearward and forward of the driver's seat, respectively. It comprises a pillar positioned above the driver's seat and connected to the second and third support columns, The aforementioned pillar is A front frame extending from above the third support column to one side, A rear frame extending from above the second support column to one side and connected to the first support column, It has a side frame that passes through one side of the driver's seat and connects the front frame and the rear frame, A work machine in which a portion of the first support column is positioned offset to the rear relative to the rear frame.

2. The first support column is, A first inclined portion that extends diagonally upward from the lower end towards the rear, A second inclined portion that extends diagonally downward from the upper end towards the rear, The work machine according to claim 1, further comprising a main body connecting the first inclined portion and the second inclined portion.

3. The work machine according to claim 2, wherein the main body is positioned offset to the rear of the rear frame.

4. The work machine according to claim 2, wherein the main body is arranged parallel to the second support column.

5. The work machine according to claim 2, wherein the main body is positioned offset to the rear relative to the second support column when viewed from the side.

6. The work machine according to claim 2, wherein the main body is positioned in front of the rear wall of the upper body.

7. The work machine according to claim 2, further comprising a beam member that spans the first support column and the second support column.

8. The working machine according to claim 7, wherein the beam member spans the main body portion of the first support column and the second support column.

9. The working machine according to claim 7, wherein the beam member is arranged at an inclination with respect to the rear frame in a plan view.

10. The aforementioned side frame is, A first side frame connected to the aforementioned front frame, It has a second side frame that connects the first side frame and the rear frame, The work machine according to claim 2, wherein, in a plan view, the second side frame is arranged at an inclination toward the main body portion relative to the first side frame.

11. The work machine according to any one of claims 1 to 10, wherein the rear frame is arranged in a plan view parallel to the direction in which the lower end of the first support column and the lower end of the second support column are aligned.

Images