JP7030435B2 - Working machine - Google Patents

Description

The present invention relates to a working machine such as a backhoe, for example.

Conventionally, a working machine disclosed in Patent Document 1 is known.
The working machine disclosed in Patent Document 1 has a prime mover mounted on a substrate constituting the bottom of the machine body. Further, a bonnet covering the prime mover is mounted on the machine body, and outside air is taken into the bonnet by a cooling fan and the prime mover is cooled by the cooling air generated by the cooling fan.

Japanese Unexamined Patent Publication No. 2010-168838

In the working machine disclosed in Patent Document 1, the cooling air taken into the bonnet from the side of the machine body passes around the prime mover and is discharged downward from the opening formed in the substrate. However, with this structure, it is difficult to sufficiently cool the entire prime mover.
Therefore, an object of the present invention is to provide a working machine capable of improving the cooling efficiency of the prime mover in view of the above problems.

The working machine according to one aspect of the present invention includes a substrate, a prime mover chamber formed on the substrate, a prime mover housed in the prime mover chamber, a cooling fan for generating cooling air for cooling the prime mover, and the above. The first exhaust unit that discharges the cooling air flowing between the prime mover and the ceiling portion of the prime mover room to the outside of the prime mover room, and the cooling air flowing between the prime mover and the bottom portion of the prime mover room are discharged into the prime mover room. The exhaust port portion for discharging the exhaust gas of the prime mover to the inside of the prime mover is provided inside the prime mover and outside the first discharge portion, and the prime mover is arranged. It is arranged in a space that is not partitioned from the space , and the cooling air flowing between the prime mover and the ceiling portion and the exhaust gas of the prime mover discharged from the exhaust port portion are brought into the prime mover room and the first. The exhaust gas, which is outside the discharge unit and is not partitioned from the space where the prime mover is arranged, is introduced into the first discharge unit, and the cooling air and the exhaust gas are mixed is the first exhaust gas. It is discharged to the outside of the prime mover room through the discharge unit .

According to the above configuration, the cooling air flowing between the prime mover and the ceiling of the motor chamber is discharged from the first discharge portion, and the cooling air flowing between the prime mover and the bottom of the prime mover room is discharged from the second discharge portion. do. As a result, the cooling air can be efficiently flowed around the prime mover, and the cooling efficiency of the prime mover can be improved.

It is a top view of a working machine. It is a side view of a working machine. It is a top view which shows the arrangement of the equipment etc. mounted on the work machine. It is a side view of the upper part of a working machine. It is a rear view of the upper part of a working machine. It is a plan view of a cabin. It is a top view of the cabin of another form. It is a top view which shows the relationship between a cabin and a boom. It is a schematic diagram explaining the interference prevention of a boom. It is a front view of a cabin. It is a front view of a driving part. It is a side view of a driving part. It is a top view of the driving part. It is a plan view of a support base. It is sectional drawing of the vertical position adjustment part of a cockpit. It is a side view of the traveling pedal and the support device of the traveling pedal. It is a top view of the traveling pedal and the support device of the traveling pedal. It is a side view of the dozer lever and the support device of the dozer lever. It is a figure of the dozer lever and the support device of the dozer lever. It is a side view of the cabin which concerns on another example. It is a plan view on the right side of the aircraft. It is a rear view of the front support frame. It is a rear view of the rear support frame. It is a top view of the rear support frame. It is a side view of the right front part of the aircraft. It is a side view of a cooling equipment unit. It is a top view of the cooling equipment unit. It is a side view which shows the state which the oil cooler is detached. It is a top view which shows the state which the oil cooler is detached. It is a side view of a radiator bracket, an oil cooler bracket, and a condenser bracket. It is a top view of the radiator bracket, the oil cooler bracket, and the condenser bracket. It is a front view of a radiator bracket, an oil cooler bracket, and a condenser bracket. It is a side view of the right front part of the aircraft. It is a plan view of a bonnet. It is a side view of the 1st bonnet side part. It is a top view of the 1st bonnet side part. It is a side view of the hydraulic equipment arrangement part. It is a side view of the 2nd side plate. It is a top view of the 2nd side plate. It is a top view of the 2nd bonnet side part. It is a rear view of the bonnet. It is a side view of the 2nd bonnet side part. It is a side view of the upper part of the prime mover room. It is a rear view of the lower part of the bonnet. It is a side sectional view of the peripheral structure of a hydraulic pump. It is a side view of the peripheral structure of a hydraulic pump. It is a top sectional view of the hydraulic oil tank. It is a side sectional view of the hydraulic oil tank.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
FIG. 1 is a schematic plan view showing the overall configuration of the working machine 1 according to the present embodiment. FIG. 2 is a schematic side view of the working machine 1. In the present embodiment, a backhoe, which is a turning work machine, is exemplified as the work machine 1.
As shown in FIGS. 1 and 2, the working machine 1 includes a machine body (swivel table) 2, a traveling device 3, and a working device 4. A cabin 5 is mounted on the aircraft 2. A driver's seat (seat) 6 on which a driver (operator) is seated is provided in the cabin 5. In other words, the driver's seat 6 is mounted on the aircraft 2, and the cabin 5 surrounds the driver's seat 6. The driver's seat 6 has a seat portion 6A on which the driver sits and a backrest portion 6B on which the driver's back is received.

In the embodiment of the present invention, the front side of the driver seated in the driver's seat 6 of the working machine 1 (direction of arrow A1 in FIGS. 1 and 2) is forward, and the rear side of the driver (arrow A2 in FIGS. 1 and 2) is forward. The direction) will be described as the rear, the left side of the driver (direction of arrow B1 in FIG. 1) as the left side, and the right side of the driver (direction of arrow B2 in FIG. 1) as the right side.
Further, as shown in FIG. 1, the horizontal direction, which is a direction orthogonal to the front-rear direction K1, will be described as the machine width direction K2 (width direction of the machine 2). The direction from the central portion in the width direction of the machine body 2 to the right side or the left side will be described as the outside of the machine body (outside in the width direction of the machine body). In other words, the outside of the machine is the direction K2 in the width direction of the machine and away from the center in the width direction of the body 2. The direction opposite to the outside of the machine is described as the inside of the machine (inside in the width direction of the machine). In other words, the inside of the machine is the direction K2 in the width direction of the machine and is closer to the center in the width direction of the body 2.

As shown in FIGS. 1 and 2, the traveling device 3 is a device that supports the machine body 2 so as to be able to travel. The traveling device 3 has a traveling frame 3A, a first traveling device 3L provided on the left side of the traveling frame 3A, and a second traveling device 3R provided on the right side of the traveling frame 3A. The first traveling device 3L and the second traveling device 3R are crawler type traveling devices. The first traveling device 3L is driven by the first traveling motor M1. The second traveling device 3R is driven by the second traveling motor M2. The first traveling motor M1 and the second traveling motor M2 are composed of a hydraulic motor (hydraulic actuator).

A dozer device 7 is attached to the front portion of the traveling device 3. The dozer device 7 can be raised and lowered (blades are raised and lowered) by expanding and contracting the dozer cylinder (hydraulic actuator).
As shown in FIG. 2, the machine body 2 is supported on a traveling frame 3A so as to be able to swivel around a swivel axis X1 via a swivel bearing 8. The swivel axis X1 is an axial center extending in the vertical direction passing through the center of the swivel bearing 8.

As shown in FIGS. 1 and 3, the cabin 5 is mounted on one side (left side) of the body 2 in the width direction K2. The cabin 5 is arranged closer to one side (left side) of the machine width direction K2 than the center line Y1 that passes through the turning axis X1 and extends in the front-rear direction K1. Further, the cabin 5 is provided in the airframe 2 near the front part.
As shown in FIGS. 1 and 3, the motor E1 is mounted on the other side (right side) of the width direction K2 of the machine body 2. The prime mover E1 is mounted vertically on the machine body 2. The vertical installation means that the axis of the crank shaft of the prime mover E1 is arranged so as to extend in the front-rear direction.

The prime mover E1 is arranged closer to the other side (right side) of the body width direction K2 than the center line Y1. The prime mover E1 is a diesel engine. The prime mover E1 may be a gasoline engine, an LPG engine, or an electric motor, or may be a hybrid type having an engine and an electric motor.
A hydraulic pump P1 is provided at the rear of the prime mover E1. The hydraulic pump P1 is driven by the prime mover E1 to pressurize and discharge the hydraulic oil used in the hydraulic drive unit. The hydraulic drive unit is, for example, a hydraulic actuator mounted on the work machine 1. A radiator R1, an oil cooler O1 and a condenser D1 are arranged in front of the prime mover E1 and mounted on the machine body 2.

The radiator R1 is a cooling device for cooling the cooling water of the prime mover E1, and the oil cooler O1 is a cooling device for cooling the hydraulic oil. Further, the condenser D1 is a cooling device (condenser) for cooling the refrigerant of the air conditioner (air conditioner) equipped in the working machine 1.
The radiator R1 is arranged in front of the prime mover E1, and the oil cooler O1 is arranged at a position (first position) facing the front surface of the radiator R1. The condenser D1 is arranged so as to face the front surface of the oil cooler O1.

A cooling fan F1 that generates cooling air for cooling the prime mover E1 is provided between the radiator R1 and the prime mover E1. The cooling fan F1 is driven by the prime mover E1 to generate cooling air flowing from the front to the rear.
As shown in FIGS. 2 and 3, the airframe 2 has a substrate (hereinafter referred to as a swivel substrate) 9 that swivels around a swivel axis X1. The swivel substrate 9 is made of a steel plate or the like and constitutes the bottom of the machine body 2. The prime mover E1 is mounted on the swivel board 9. Vertical ribs 9L and 9R, which are reinforcing members, are provided on the center side of the upper surface of the swivel substrate 9 from the front portion to the rear portion. The vertical rib 9L is arranged on one side from the center of the width direction K2 of the machine body 2, and the vertical rib 9R is arranged on the other side. Further, in addition to the vertical ribs 9L and 9R, the swivel substrate 9 is provided with a support member or the like for supporting an object such as a device mounted on the machine body 2, thereby forming a swivel frame which is a skeleton of the machine body 2. .. The horizontal perimeter of the swivel frame is covered by the swivel cover 12 (see FIGS. 4 and 5).

A weight 10 is provided at the rear of the machine body 2. The weight 10 is arranged at the rear part of the machine body 2 and the lower part is attached to the swivel board 9. Further, the weight 10 is formed so as to project upward from the swivel substrate 9. Further, the weight 10 is arranged behind the cabin 5 and the driver's seat 6.
As shown in FIGS. 3, 4, and 5, the weight 10 is formed to be narrower than the width of the rear portion of the swivel substrate 9 in the aircraft width direction K2 (approximately 1/2 of the width of the rear portion of the aircraft 2). It is arranged on the center side of the swivel board 9 in the body width direction K2. The upper end of the weight 10 is located at a height position in the upper and lower parts of the cabin 5 and the driver's seat 6. That is, the weight 10 is formed at a height from the swivel board 9 to the upper and lower half positions of the cabin 5 and the driver's seat 6.

As shown in FIGS. 1 to 3, a fuel tank T1 and a hydraulic oil tank T2 arranged side by side along the machine width direction K2 are mounted on the rear portion of the machine body 2. The fuel tank T1 is a tank for storing the fuel of the prime mover E1. The hydraulic oil tank T2 is a tank for storing hydraulic oil. The fuel tank T1 and the hydraulic oil tank T2 are arranged between the weight 10 and the operation unit 42 described later.

The fuel tank T1 and the hydraulic oil tank T2 are arranged behind the cabin 5 and the driver's seat 6. The lower part of the fuel tank T1 and the hydraulic oil tank T2 is attached to a mounting member fixed to the swivel board 9, and the lower part thereof protrudes upward from the swivel board 9 (lower part of the machine body 2). A weight 10 is arranged behind the fuel tank T1 and the hydraulic oil tank T2. Further, the fuel tank T1 and the hydraulic oil tank T2 are arranged so as to be within the width of the weight 10 in the body width direction K2 and facing the front surface of the weight 10. The fuel tank T1 is located on one side (left side) of the airframe width direction K2 with respect to the hydraulic oil tank T2, and the hydraulic oil tank T2 is located on the other side (right side) of the airframe width direction K2 with respect to the fuel tank T1. There is.

As shown in FIGS. 4 and 5, the upper ends of the fuel tank T1 and the hydraulic oil tank T2 are located at the height positions of the cabin 5 and the driver's seat 6 in the vertical direction (substantially the central portion in the vertical direction of the cabin 5). is doing. Further, the upper end of the fuel tank T1 is substantially the same as the height position of the upper end of the weight 10, and the upper end of the hydraulic oil tank T2 is lower than the upper end of the weight 10. Further, the fuel tank T1 and the hydraulic oil tank T2 have a shape in which the height is relatively high and the cross-sectional area in the horizontal direction is relatively small (vertical shape), specifically, the width in the left-right direction and the width in the front-rear direction are higher and lower. The height in the direction is formed to be higher. As a result, even when the airframe 2 is tilted or the like, the fuel in the fuel tank T1 can be appropriately supplied and the fuel can be effectively used. The shape of the fuel tank T1 may be higher than the sum of the width in the left-right direction and the width in the front-rear direction.

As shown in FIGS. 4 to 6, a space 46 is provided behind the lower part of the cabin 5. This space 46 is formed near the outside of the fuselage behind the cabin 5. The space 46 is formed to have a first forming surface 47, a second forming surface 48, and a step (floor surface) 49.
The first forming surface 47 is formed on the side surface of the rear mounting member arranged behind the cabin 5. The side surface of the rear mounting member is a side surface located behind the lower part of the cabin 5 and facing the outside of the machine body. The rear mounting member is the first cover 18A and the weight 10 in this embodiment. The first cover 18A is a cover member that covers the fuel tank T1 and is provided between the weight 10 and the operating unit 42. Further, the first cover 18A has an upper wall portion 50 that covers the upper part of the fuel tank T1 and a side wall portion 51 that covers the left side of the fuel tank T1. The side surface of the rear mounting member, that is, the first forming surface 47 is formed by the side surface of the first cover 18A (the outer surface of the side wall portion 51) and the left side surface 10a of the weight 10. The first forming surface 47 is located closer to the center portion in the width direction of the machine body 2 than the center portion in the body width direction K2 of the cabin 5. The first forming surface 47 is not limited to the configuration formed by the side surface of the first cover 18A and the side surface 10a of the weight 10, and may be formed by, for example, the side wall of the fuel tank (rear mounting member) T1.

The second forming surface 48 is the back surface of the cabin 5.
Step 49 is provided on the lower end side of the cabin 5 and forms the lower surface of the space 46. That is, the space above the step (floor surface) 49 is the space 46. Further, step 49 is a member that forms the upper surface of the machine body 2, and an operator can ride on it. Further, the fuel tank T1 is arranged in the vicinity of step 49.

As described above, the space 46 is formed by the first forming surface 47, the second forming surface 48, and the step 49 so as to be upward from the lower end of the cabin 5 and open upward. The space 46 is also open to the left (outside the fuselage) and to the rear.
As shown in FIG. 5, a rear window 52 is provided on the back side of the cabin 5 so that the rear of the cabin 5 can be visually recognized from the room. The rear window 52 is provided on the left side (outside the machine body side) of the back surface of the cabin 5 and in front of the space 46. Further, the rear window 52 is formed from the upper part to the lower part of the cabin 5. The width of the rear window 52 in the airframe width direction K2 is formed from one end to the other end of the front portion of the space 46 in the airframe width direction, and the lower portion of the rear window 52 corresponds to the space 46.

The rear window 52 can be opened and closed. As shown in FIG. 6, the rear window 52 is rotatably supported on the right end side by a hinge 56 around a vertical axis (an axial center extending in the vertical direction). As a result, the rear window 52 opens rearward and penetrates into the space 46, as shown by a virtual line in FIG. The rear window 52 may be a sliding type or a detachable type window.
Further, step 49 is provided on the side of the fuel tank T1. As shown in FIG. 6, the upper wall portion 50 of the first cover 18A has an opening 55 provided on the upper portion (upper wall) of the fuel tank T1 and formed above the fuel filler port for refueling. .. The opening 55 is closed by the lid member 54 so as to be openable and closable. As a result, in the present embodiment, since the vertically long fuel tank T1 is mounted, the position of the fuel filler port becomes high, but the operator can easily refuel by riding on step 49 to perform the refueling work. can.

As shown in FIG. 4, a fuel refueling device 57 for refueling the fuel tank T1 is provided in the airframe 2 below the step 49. The fuel refueling device 57 has a refueling pump, a suction hose, and a refueling hose. The refueling pump sucks the fuel in the refueling container through the suction hose, and the sucked fuel is sucked by the refueling hose. Send to fuel tank T1.
Further, as shown in FIG. 4, the sedimentor 58 for removing the water mixed in the fuel, the fuel pump 59 for sending the fuel to the prime mover E1, and the like are housed in the machine body 2 below the step 49.

Further, the step 49 can be opened and closed, and by opening the step 49, the fuel refueling device 57, the fuel pump 59, the sedimentor 58, and the like can be easily accessed. The opening / closing mechanism of step 49 is not particularly limited, and may be, for example, a hinge type, a slide type, or a detachable type.
As shown in FIG. 6, a door 53 is provided on the outer side surface (left side) of the cabin 5 on the outer side of the machine body. The rear portion of the door 53 is rotatably supported by a hinge 61 around the vertical axis, and the front portion moves in the body width direction K2 to open and close the entrance / exit 62.

FIG. 7 shows the door 53 as a sliding door or a link door instead of the hinged door. The door 53 moves rearward along the cabin 5 to open. Further, the door 53 opens to a position where the rear portion enters (accommodates) the space 46. As a result, even when the turning work is performed with the door 53 open, the door 53 is housed in the turning track of the machine body 2, so that there is a risk that the door 53 will come into contact with an object around the machine body and be damaged. Can be reduced.

As shown in FIG. 4, an air conditioner main body 63 of an air conditioner is provided below the cabin 5 and inside the airframe 2. The air conditioner main body 63 has an evaporator and a blower fan. The conditioned air blown out from the air conditioner main body 63 passes through the middle pillar 64 on the right side, and is blown out to the driver's seat 6 side from the blowout port 65 provided in the upper part of the intermediate pillar 64. Further, the conditioned air blown out from the air conditioner main body 63 passes through the duct 66 provided in the front part of the cabin 5, and is blown out to the upper glass 68A of the windshield 68 from the outlet 67 provided in the upper part of the duct 66. Ru. The upper glass 68A is movable up and down in a straight line, and by moving it downward, the upper front surface of the cabin 5 can be opened. The lower glass 68B of the windshield 68 is fixed.

As shown in FIG. 4, a grip portion 60L, 60R for gripping the upper glass 68A when the upper glass 68A is moved is provided on the upper portion of the upper glass 68A. As shown in FIG. 6, the grip portion 60L is provided on the left side of the upper glass 68A, and the grip portion 60R is provided on the right side of the upper glass 68A.
As shown in FIG. 3, the swivel substrate 9 is connected to the swivel bearing 8, and the machine body 2 is swiveled by the swivel motor M3. The swivel motor M3 is a hydraulic motor (hydraulic actuator, hydraulic equipment). As shown in FIGS. 3 and 37, the swivel bearing 8 is fixed to the inner race 8A fixed to the traveling frame 3A and the swivel substrate 9. It has an outer race 8B. Internal teeth are formed on the inner peripheral portion of the inner race 8A, and the pinion 11 meshes with the internal teeth. The pinion 11 is attached to the output shaft of the swivel motor M3, and the swivel motor M3 is fixed to the swivel substrate 9. Therefore, by driving the pinion 11 by the swivel motor M3, the machine body 2 swivels. The center of the swivel bearing 8 is the swivel center of the machine body 2 (swivel axis X1).

As shown in FIGS. 1 and 3, a swivel joint (hydraulic device) S1 is provided at the position of the turning axis X1. The swivel joint S1 is a hydraulic device for circulating hydraulic oil, and is a rotary joint (rotary joint) for circulating hydraulic oil between the hydraulic device on the machine body 2 side and the hydraulic device on the traveling device 3 side. A swivel motor M3 is arranged in front of the swivel joint S1. A control valve (hydraulic device) V1 is arranged behind the swivel joint S1. The control valve V1 is a hydraulic device in which control valves for controlling hydraulic actuators such as hydraulic cylinders and hydraulic motors mounted on the working machine 1 are integrated. The control valve constituting the control valve V1 is a control valve electrically controlled by the control device U1 described later, and for example, a pilot type solenoid valve is adopted. The pilot solenoid valve is a valve that controls the flow of hydraulic oil by moving the main spool by the pilot pressure controlled by the solenoid. The control valve constituting the control valve V1 is, for example, a control that controls a first traveling motor M1, a second traveling motor M2, a swivel motor M3, a dozer cylinder, a swing cylinder C2, a boom cylinder C3, an arm cylinder C4, and a bucket cylinder C5. It is a valve.

A hydraulic oil tank T2 is arranged behind the control valve V1. The hydraulic pump P1 is arranged on the right side of the hydraulic oil tank T2 and closer to the front part.
The arrangement zone from the swivel motor M3 to the hydraulic pump P1 via the swivel joint S1, the control valve V1, and the hydraulic oil tank T2 is the hydraulic equipment arrangement unit 13 for arranging these hydraulic equipment. In other words, a hydraulic equipment arrangement unit 13 in which hydraulic equipment is arranged is provided between the cabin 5 and the prime mover E1, and the hydraulic equipment arranged in the hydraulic equipment arrangement unit 13 is a swivel joint S1 and a swivel motor M3. , Includes control valve V1. The hydraulic equipment arranging portion 13 includes a first arranging portion (arranging portion) 13A in which the swivel joint S1, the swivel motor M3, and the control valve V1 are arranged, and a second arranging portion 13B in which the hydraulic oil tank T2 and the hydraulic pump P1 are arranged. Has (see FIG. 1).

As shown in FIG. 3, a control device U1 is provided below the cabin 5. The control device U1 controls the control valves constituting the control valve V1. The control device U1 is arranged on the left side of the control valve V1 and on the right side of the vertical rib 9L.
The swivel joint S1, the swivel motor M3, and the control valve V1 are provided at a position where a part or all of these devices are separated from the cabin 5 in the body width direction K2. As a result, the above-mentioned devices can be accessed without lowering the cabin 5 at the time of maintenance or the like.

As shown in FIG. 1, the machine body 2 is provided with a cover device 14 for covering the mounting member provided on the working machine 1. The cover device 14 has a first cover body (cover body) 15, a second cover body 16, a third cover body (cover member) 17, and a fourth cover body (rear cover body) 18.
The first cover body 15 is located in the front part on the right side of the machine body 2, and covers the radiator R1, the oil cooler O1, and the condenser D1. On the front side surface of the first cover body 15, the first cover body 1
An outside air intake port 19 for taking in outside air is provided inside the 5. The outside air is taken in from the outside air intake port 19 by being sucked by the cooling fan F1.

The second cover body 16 is located behind the first cover body 15 and covers the prime mover E1. That is, the second cover body 16 is a bonnet that forms a prime mover room (engine room) ER that houses the prime mover E1 (hereinafter referred to as a bonnet).
The third cover body 17 is located between the first cover body 15 and the second cover body 16 and the cabin 5 (driver's seat 6), and covers the equipment arrangement portion 13. In the present embodiment, the third cover body 17 covers the first arrangement portion 13A, which is the equipment arrangement portion 13 between the prime mover E1 and the cabin 5. That is, the third cover body 17 covers the swivel joint S1, the swivel motor M3, and the control valve V1.

The fourth cover body 18 is located at the rear of the swivel board 9, and covers the fuel tank T1 and the hydraulic oil tank T2 and the like. The fourth cover body 18 has a first cover 18A, a second cover 18B, and a third cover 18C. The first cover 18A covers the upper side and the left side of the fuel tank T1 (see FIG. 4). The second cover 18B covers the upper part of the hydraulic oil tank T2 and the hydraulic pump P1. The third cover 18C is located on the right side of the weight 10 and covers the rear of the hydraulic pump P1. Further, the third cover 18C is openable and closable.

As shown in FIG. 3, the machine body 2 has a support bracket 20 at a front portion slightly to the right of the center of the machine body width direction K2. The support bracket 20 is fixed to the front portion of the vertical ribs 9L and 9R, and is provided so as to project forward from the machine body 2.
As shown in FIGS. 1 and 2, a swing bracket 21 is swingably attached to the front portion (a portion protruding from the machine body 2) of the support bracket 20 via a swing shaft 26 so as to swing around the vertical axis. Therefore, the swing bracket 21 can rotate in the body width direction K2 (horizontally about the swing shaft 26). Further, the swing shaft 26 is located on the other side of the machine body width direction K2 with respect to the driving unit 42.

As shown in FIG. 1, the swing bracket 21 is located in front of the swivel joint S1. Further, the swing bracket 21 is arranged in front of the turning axis X1 and at a position where at least a part thereof overlaps with the center line Y1 when the boom 22 described later is facing the front direction of the machine body. Further, the center line Y1 is located between the line Y2 in the front-rear direction passing through the axis X2 of the swing shaft 26 and the right side surface 5A of the cabin 5 (substantially in the center). Further, the line Y2 passes between the prime mover E1 and the driving unit 42.

A working device 4 is attached to the swing bracket 21.
As shown in FIG. 2, the working device 4 has a boom 22, an arm 23, and a bucket (working tool) 24. The base portion 22A of the boom 22 is pivotally attached to the upper part of the swing bracket 21 via the boom pivot 27 so as to be rotatable around a horizontal axis (an axis extending in the body width direction K2). As a result, the boom 22 can swing in the vertical direction. Further, the boom 22 is bent so that the central portion in the longitudinal direction is convex rearward at the raised position shown in FIG.

The arm 23 is pivotally attached to the tip end side of the boom 22 so as to be rotatable around a horizontal axis. As a result, the arm 23 can swing back and forth or up and down. The bucket 24 is provided on the tip end side of the arm 23 so that it can be squeezed and dumped. The squeeze operation is an operation of swinging the bucket 24 in a direction closer to the boom 22, and is an operation of scooping earth and sand, for example. The dump operation is an operation of swinging the bucket 24 in a direction away from the boom 22, for example, an operation of dropping (discharging) scooped earth and sand.

The work machine 1 can be equipped with another work tool (hydraulic attachment) that can be driven by a hydraulic actuator in place of or in addition to the bucket 24. Examples of other working tools include hydraulic breakers, hydraulic crushers, angle blooms, earth augers, pallet forks, sweepers, mowers, snow blowers and the like.
The swing bracket 21 can be swung by the expansion and contraction of the swing cylinder C2 provided in the machine body 2. The boom 22 can be swung by the expansion and contraction of the boom cylinder C3. The arm 23 can be swung by the expansion and contraction of the arm cylinder C4.
The bucket 24 can be squeezed and dumped by expanding and contracting the bucket cylinder (working tool cylinder) C5. The swing cylinder C2, the boom cylinder C3, the arm cylinder C4, and the bucket cylinder C5 are composed of a hydraulic cylinder (hydraulic actuator).

As shown in FIG. 1, the swing cylinder C2 is provided in the airframe 2 below the cabin 5. The attachment portion 25 on the base end side of the swing cylinder C2 is attached to the swivel board 9 and is located below the driver's seat 6. A tool box may be provided below the cabin 5.
As shown in FIG. 1, the base portion 22A of the boom 22 is located on the center line Y1 side of the cabin 5. In other words, the swing bracket 21 and the base portion 22A of the boom 22 are arranged in front of the motor E1 and the cabin 5. Therefore, when the boom 22 is raised (set to the highest position) with the swing bracket 21 facing forward (front), the lower portion of the boom 22 overlaps with the cabin 5 in the side view, and the boom 22 and the arm 23 are brought into contact with each other. The connection portion is arranged substantially vertically above the swing bracket 21 (see FIG. 2).

Further, at the highest position of the boom 22, when the arm 23 is swung in a direction closer to the boom 22 while the bucket 24 is squeezed, substantially the entire bucket 24 is a dozer, as shown by a solid line in FIG. It is arranged behind the front end of the device 7 (in the A2 direction), and a part of the bucket 24 is arranged behind the front end of the swing bracket 21.
In this way, the arm 23 and the bucket 24 can be brought closer to the machine body 2 so that a part of the bucket 24 is located behind the front end of the swing bracket 21 when the boom 22 is in the raised position. The working device 4 can be swiveled with a small radius when swirling. Thereby, for example, the operation can be stabilized when the work of loading earth and sand on the loading platform of the dump truck or the work of suspending the transported object by hanging the transported object on the hook provided on the tip side of the arm 23. Further, since the position of the bucket 24 can be brought closer to and higher than the machine body 2 when the boom 22 is in the raised position, the working machine 2 can be brought closer to the loading platform when loading earth and sand on the loading platform of the dump truck. Workability can be improved. Further, when the arm 23 is swung in the direction away from the boom 22 from the state shown by the solid line in FIG. 2, the locus of the bottom of the bucket 24 is directed upward, so that the dump operation when loading earth and sand on the dump truck bed is smooth. Can be done.

As shown by the solid line in FIG. 8, when the boom 22 is raised with the swing bracket 21 facing forward, the boom 22 overlaps with the cabin 5 in the body width direction K2. From this state, if the swing bracket 21 is swung to the right as shown by the arrow, the boom 22 may come close to the cabin 5 and interfere with it. Further, as shown by the virtual line, even when the boom 22 is raised while the swing bracket 21 is swung to the right side, the boom 22 may interfere with the cabin 5 in close proximity.

Therefore, the working machine 1 has an interference prevention function of preventing the boom 22 from interfering with the cabin 5. This interference prevention function will be described with reference to FIG.
As shown in FIG. 9, the boom cylinder C3 is controlled by a boom control valve 74, which is one of the control valves V1. The boom control valve 74 has a neutral position 74A for stopping the boom 22, an ascending position 74B for raising the boom 22, and a descending position 74C for lowering the boom 22. Further, the boom control valve 74 has a first solenoid 74D for switching to the ascending position 74B and a second solenoid 74E for switching to the descending position 74C. The first solenoid 74D and the second solenoid 74E are connected to the control device U1.

The operating direction and operating amount of the operating member (for example, the second steering handle 82R described later) that operates the boom 22 is detected by the angle sensor and sent to the control device U1. The control device U1 outputs a signal to the first solenoid 74D or the second solenoid 74E based on the acquired operation direction and operation amount. As a result, the boom cylinder C3 is expanded and contracted to swing the boom 22 up and down.

The support bracket 20 or the swing bracket 21 is provided with a first angle sensor 71. The first angle sensor 71 is a sensor that detects the rotation angle (swing angle) around the swing shaft 26 with respect to the support bracket 20 of the swing bracket 21. The swing bracket 21 or the boom 22 is provided with a second angle sensor 71. The second angle sensor 71 is a sensor that detects the rotation angle of the boom 22 with respect to the swing bracket 21 around the boom pivot 27. The first angle sensor 71 and the second angle sensor 71 are formed by, for example, a potentiometer.

A detection device 45 for detecting the position of the boom 22 is configured by the first angle sensor 71 and the second angle sensor 71. The first angle sensor 71 and the second angle sensor 71 are connected to the control device U1.
The control device U1 acquires the detection signal of the detection device 45 (first angle sensor 71 and second angle sensor 71). The control device U1 has a position detection unit 73 and a boom stop unit 75.

The position detection unit 73 detects the position of the boom 22 based on the detection signals from the first angle sensor 71 and the second angle sensor 71. The boom stop section 75 is a signal to stop the boom 22 (when the boom 22 is close to the cabin 5) before the boom 22 interferes with the cabin 5 based on the position of the boom 22 detected by the position detection section 73. Is output to the boom control valve 74. Specifically, the boom stop portion 75 is operated to swing to the right from the state where the boom 22 is raised, or when the operation to raise the boom 22 from the state where the boom 22 is swung to the right is performed. In addition, when the operation corresponding to the operation is performed, it is determined whether or not the boom 22 is close to the cabin 5, and if it is determined that the boom 22 is close to the cabin 5, the operation of the boom 22 is stopped or restricted so that the boom 22 does not interfere with the cabin 5. do.

As shown in FIGS. 2, 4, and 6, the driver's seat 6 is arranged at the rear part in the cabin 5. A control device 41 is provided in the cabin 5. The control device 41 is provided in front of the driver's seat 6. The driver's seat 6 and the control device 41 constitute a driving unit 42 for driving (steering) the work machine 1. In the present embodiment, the configuration (cabin specification) in which the operating unit 42 is arranged in the cabin 5 will be described, but the present invention is not limited to this, and the front-rear direction K1 and the machine width direction K2 of the operating unit 42 are open to the outside. The upper part may be covered with a roof (canopy specification), or the operation unit 42 may have a front-rear direction K1, a machine width direction K2, and an upper part open to the outside.

As shown in FIGS. 4 and 10, the driver's seat 6 is supported by the floor portion 5B constituting the bottom portion of the cabin 5. A seat base 76 is attached on the floor 5B and at the center of the aircraft width direction K2. A suspension device 77 is provided on the seat base 76, and a driver's seat 6 is provided on the suspension device 77 via a slide rail 78 so that the front-rear position can be adjusted.

The driver's seat 6 may be rotatable around the vertical axis. That is, the center of the seat portion 6A may be rotatably supported on the seat base 76 around the vertical axis, and the direction of the driver's seat 6 may be freely changed to the left or right around the vertical axis.
Further, as shown in FIG. 20, the slide rail 78 may be formed in an inclined shape that shifts upward as it goes backward. The slide rail 78 has a fixed rail 78A and a movable rail 78B. The fixed rail 78A and the movable rail 78B are inclined so as to move upward as they go backward. The fixed rail 78A is attached to the fixed base 111 fixed to the seat base 76. The movable rail 78B is attached to a movable base 112 fixed to the lower surface of the seat portion 6A. The movable rail 78B can move along the fixed rail 78A and can be fixed to the fixed rail 78A.

By using the rearwardly inclined slide rail 78, the position of the driver's seat 6 can be adjusted in the inclined direction in which the driver's seat 6 shifts upward as it goes backward. That is, when the movable rail 78B is moved rearward, the position of the seat portion 6A becomes higher, and adjustments can be made corresponding to a tall driver.
As shown in FIGS. 4, 6, and 13, the control device 41 includes a control table 81, a control member 82, an elbow rest member 83, a monitor 84, a traveling operation member 85, and a dozer lever (operation lever) 80. And have.

As shown in FIGS. 10, 11, and 12, the cockpit 81 is provided in front of the driver's seat 6 and on the center side of the cabin 5 in the body width direction K2. The control table 81 has a base 86 erected on the floor portion 5B and a support base 87 supported on the base 86 so as to be vertically adjustable.
As shown in FIGS. 10 to 12 and 14, the base 86 has a first support column 88L, a second support column 88R, a connecting plate 89, a first reinforcing plate 90L, and a second reinforcing plate 90R. The first support column 88L and the second support column 88R are formed by a columnar body having an axial center in the vertical direction, and are erected on the floor portion 5B. The first support column 88L is arranged to the left of the center of the cabin 5 in the body width direction K2, and the second support column 88R is arranged to the left of the center of the cabin 5 in the body width direction K2.

As shown in FIG. 15, a plurality of lock holes (first lock hole 94A to fifth lock hole 94E) are formed at lower portions of the first support column 88L and the second support column 88R at intervals in the vertical direction. ..
As shown in FIGS. 10, 11 and 14, the connecting plate 89 is arranged between the lower part of the first support column 88L and the second support column 88R, and connects the first support column 88L and the second support column 88R. The first reinforcing plate 90L is fixed to the lower part of the front surface of the first support column 88L, and the second reinforcing plate 90R is fixed to the lower part of the front surface of the second support column 88R. The lower ends of the first reinforcing plate 90L and the second reinforcing plate 90R are fixed to the floor portion 5B.

As shown in FIGS. 11, 12, and 14, the support base 87 has a mounting body 92 mounted on the upper portion of the base 86 so as to be vertically adjustable, and a mounting base 93 fixed to the mounting body 92. .. In the present embodiment, the mounting base 93 is supported by the base 86 via the mounting body 92 so that the vertical position can be adjusted.
As shown in FIG. 14, the mounting body 92 is provided on the lower surface side of the mounting base 93. The mounting body 92 includes a first movable member 92L, a second movable member 92R, a plurality of reinforcing plates (first reinforcing plates 92A to fifth reinforcing plates 92E), a first fixing device (fixing device) 91L, and a first. It has two fixing devices (fixing devices) 91R. The first movable member 92L and the second movable member 92R are composed of a tubular body (cylindrical body) having an axial center in the vertical direction. The first movable member 92L is fitted to the first support column 88L so as to be vertically movable, and the second movable member 92R is fitted to the second support column 88R so as to be vertically movable (see FIG. 15). As a result, the mounting body 92 can move up and down with respect to the base 86.

As shown in FIGS. 14 and 15, the first movable member 92L and the second movable member 92R are formed with an insertion hole 101 penetrating in the radial direction. By moving the first movable member 92L and the second movable member 92R up and down, the insertion hole 101 can be matched with any of a plurality of lock holes (first lock hole 94A to fifth lock hole 94E).
The first reinforcing plate 92A extends in an inclined direction toward the outside (left) of the machine body as it goes backward from the first movable member 92L. The second reinforcing plate 92B extends in an inclined direction toward the inside of the machine (to the right) as it goes backward from the second movable member 92R. The third reinforcing plate 92C extends in an inclined direction toward the outside (left) of the machine body as it goes forward from the first movable member 92L. The fourth reinforcing plate 92D extends in an inclined direction toward the inside of the machine (to the right) as it goes backward from the second movable member 92L. The fifth reinforcing plate 92E connects the first movable member 92L and the second movable member 92L.

The first fixing device 91L and the second fixing device 91R are devices for fixing the mounting body 92 (support base 87) to the base 86. Since the second fixing device 91R has the same configuration as the first fixing device 91L, the first fixing device 91L will be described, and the description of the second fixing device 91R will be omitted.
As shown in FIGS. 14 and 15, the first fixing device 91L includes a support member 96, a lock member 97, a shooting 98, and an urging member 99. The support member 96 has an upper wall 96A and a lower wall 96B fixed to the first movable member 92L (second movable member 92R), and a support wall 96C connecting the upper wall 96A and the lower wall 96B.

The lock member 97 is formed of a bar member, and one end side thereof can be inserted into the insertion hole 101 and selectively inserted into any of the first lock hole 94A to the fifth lock hole 94E. By inserting the lock member 97 into any of the insertion hole 101 and the first lock hole 94A to the fifth lock hole 94E, the vertical movement of the mounting body 92 with respect to the base 86 is restricted. The other end side of the lock member 97 penetrates the support wall 96C. On the other end side of the lock member 97,
The shooting 98 is fixed. The lock member 97 is movable in the radial direction of the first movable member 92L (second movable member 92R).

By grasping the shooting 98 and pulling out the lock member 97 from the lock hole (first lock hole 94A to fifth lock hole 94E), the support base 87 is allowed to move up and down with respect to the base 86. In this state, the support base 87 is moved up and down, and the lock member 97 is inserted into the insertion hole 101 and the lock hole at an arbitrary position, whereby the vertical position of the support base 87 with respect to the base 86 is fixed. As described above, the vertical position of the support base 87 can be adjusted (height adjustment).

The urging member 99 is provided between the spring receiving member 100 provided on the lock member 97 and the support wall 96C, and urges the lock member 99 in the direction of inserting the lock member 99 into the insertion hole 101 and the lock hole.
As shown in FIG. 11, the mounting base 93 is formed of a plate material and is arranged so that the plate surface faces up and down.

As shown in FIG. 14, the mounting base 93 has a main portion 93A, a first extending portion 93L, and a second extending portion 93R. The main portion 93A is formed in a horizontally long shape in the width direction of the machine body K2. The first extending portion 93L extends rearward from one side portion of the main portion 93A in the body width direction K2. Specifically, the first extending portion 93L is extended in an inclined direction in which the main portion 93A moves toward the outside of the fuselage as it goes backward from the portion (left portion) on the outer side of the fuselage. The second extending portion 93R extends rearward from the other side portion of the main portion 93A in the body width direction K2. Specifically, the second extending portion 93R is extended in an inclined direction in which the main portion 93A moves toward the inside of the aircraft as it goes backward from the portion (right portion) on the inside of the aircraft.

An open recess 93B is provided rearward on the rear side of the mounting base 93 by the edge portion on the back side of the central portion of the main portion 93A, the right edge portion of the first extension portion 93L, and the left edge portion of the second extension portion 93R. It is formed. The recess 93B is expanded toward the rear. By forming the recess 93B, the driver can easily approach the upper glass 68A when the upper glass 68A is moved up and down.

The control member 82 is a member (grip) that the driver grips and operates. As shown in FIGS. 11 to 13, the control member 82 includes a first control handle 82L and a second control handle 82R. The first control handle 82L is provided on one side (left portion) of the main portion 93A with respect to the central portion in the body width direction K2. The second steering handle 82R is provided on the other side (right portion) of the central portion of the main portion 93A in the aircraft width direction K2 and on the side of the first steering handle 82L.

The first control handle 82L and the second control handle 82R are both devices equipped on the work machine 1 that can operate two operation targets. The first control handle 82L can, for example, turn the aircraft 2 which is the first operation target and swing the arm 23 which is the second operation target. Further, the second steering handle 82R can, for example, swing the bucket 24, which is the first operation target, and swing the boom 15, which is the second operation target. The operating direction and swing amount of the control member 82 are detected by the angle sensor. The detection signal of this angle sensor is sent to the control device U1. The control device U1 controls a control valve that controls an operation target based on a detection signal from the angle sensor.

The first control handle 82L and the second control handle 82R are supported by the mounting base 93 so as to be swingable, and are front and rear (front and rear direction K1), left and right (airframe width direction K2), and front and rear direction K1. It can be operated in any diagonal direction between the aircraft width direction K2 and the aircraft. As shown in FIGS. 11 and 12, the swing fulcrum W1 of the first steering handle 82L and the second steering handle 82R is provided inside the steering wheel. Therefore, the structure including the first steering handle 82L, the second steering handle 82R, the support mechanism for supporting them, and the like is a compact structure having a low height. As a result, the first control handle 82L and the second control handle 82R have a handle structure that can reduce the amount of operation at hand and can operate stably even when the aircraft 2 shakes.

As a measure against the fall of water droplets, the structure may be such that the periphery of the control table 81 is tilted forward. As shown in FIG. 12, a fuse box 113 is provided on the lower surface side of the mounting base 93.
The elbow rest member 83 is a member on which the driver puts his elbow. As shown in FIG. 13, the elbow rest member 83 is provided on the mounting base 93 (control base 81). The elbow rest member 83 extends from the mounting base 93 (control base 81) toward the driver's seat 6. In this embodiment, the elbow rest member 83 extends from the rear side of the control member 82 to the rear.

The armrest member 83 includes a first armrest 83L and a second armrest 83R. The first armrest 83L extends rearward from the rear side of the first steering handle 82L. Specifically, the first armrest 83L extends in an inclined direction in which the first armrest 83L shifts to the outside (left) of the aircraft from the rear side of the first steering wheel 82L toward the rear. Further, the first armrest 83L is arranged above the first extending portion 93L along the first extending portion 93L. The first armrest 83L is attached to the first extending portion 93L via the support member 103L.

The second armrest 83R extends rearward from the rear side of the second steering handle 82R. Specifically, the second armrest 83R extends in an inclined direction toward the inside of the aircraft (to the right) from the rear side of the second steering wheel 82R to the rear side. Further, the second armrest 83R is arranged above the second extending portion 93R along the second extending portion 93R. The second armrest 83R is attached to the second extending portion 93R via the support member 103R.

In the control device 41 of the present embodiment, the driver puts the elbow of the left arm on the first armrest 83L, grips the first control handle 82L with the left hand, puts the elbow of the right arm on the second armrest 83R, and puts the elbow of the right arm on the second armrest 83R. Grasp the steering handle 82R. Therefore, the driver operates the control member 82 with the upper body in a forward leaning posture while sitting in the driver's seat 6. As a result, the driver is in a posture of operating the first steering wheel 83L and the second steering wheel 83R with the upper body close to the front side of the cabin 5.

Further, in the present embodiment, by locating the control member 82 and the elbow rest member 83 in front of the driver's seat 6, the left and right side surfaces of the cabin 5 are brought closer to the driver's seat 6, and the cabin 5 is located in the body width direction K2. The dimensions are compact.
Further, the first armrest 83L protrudes to the left from the driver's seat 6, and the second armrest 83R protrudes to the right from the driver's seat 6, so that the distance between the first armrest 83L and the second armrest 83R is wide. I'm taking it.

Further, the first armrest 83L and the second armrest 83R are provided in an inclined shape so that the mutual distance in the body width direction K2 increases toward the rear.
Further, as shown in FIG. 13, the first armrest 83L and the first extending portion 93L partially overlap with the left portion of the seat portion 6A in the vertical direction. The second armrest 83R and the second extending portion and 93R partially overlap with the right portion of the seat portion 6A in the vertical direction. In the present embodiment, the driver's seat 42 (cabin 5) is moved back and forth by arranging the control device 41 (control cab 81) and the driver's seat 6 close to each other in the front-rear direction and bringing the driver's seat 6 closer to the control device 41. It is compactly configured.

As shown by a virtual line in FIG. 20, the first armrest 83L (elbow rest member 83) may have a front portion pivotally supported on the control table 81 so that the rear portion can swing upward. In the case of the present embodiment, the first extension portion 93L can be swung upward together with the first armrest 83L.
Further, the first armrest 83L and the second armrest 83R are preferably supported on the mounting base 93 so as to be adjustable in position in the front-rear direction K1. This makes it possible to stabilize the angle of the arm for a tall driver. Further, when getting on and off, the first armrest 83L can be moved to the front side to widen the width of the getting on and off passage.

As shown in FIGS. 11 and 13, the monitor 84 is arranged on the upper surface side of the mounting base 93, and is provided between the first steering handle 82L and the second steering handle 82R. Specifically, the monitor 84 is arranged at the center of the mounting base 93 in the airframe width direction K2, the first steering handle 82L is arranged on one side of the monitor 84 in the airframe width direction K2, and the second steering handle 82R is , The monitor 84 is arranged on the other side of the body width direction K2 of the monitor 84. Further, the first steering wheel 82L, the second steering wheel 82R, and the monitor 84 are arranged side by side in the aircraft width direction K2. The monitor 84 is located in front of the driver who grips the first control handle 82L and the second control handle 82R and drives the work machine 1 in a forward leaning posture.

The monitor 84 has an inclined surface on the rear surface (driver's seat 6 side) that shifts backward as it goes downward, and a display unit (screen) 84A for displaying is provided on the inclined surface. That is, the display unit (screen) 84A has an inclined surface that inclines downward, so that the driver who operates the control member 82 in the forward tilted posture can easily see the display unit (screen) 84A.
The display unit 84A displays basic information of the work machine 1, an image of the surroundings of the work machine 1, information necessary for making various settings of the work machine 1, and the like. The basic information is, for example, an operating status, a mode change, various settings, a warning, a remaining amount of fuel, a time (time), and the like. The image around the working machine 1 is, for example, an image behind the working machine 1. As shown in FIG. 4, an image pickup device 43 (camera or the like) capable of capturing an image of the rear of the machine body 2 is provided above the weight 10, and the image captured by the image pickup device 43 can be displayed on the display unit 84A. The monitor 84 and the image pickup apparatus 43 can communicate with each other by an in-vehicle communication network such as CAN (Controller Area Network) or FlexRay. The image pickup device 43 may be able to capture an image of the surroundings of the machine body 2 by making the orientation changeable by remote control or the like. Further, an image pickup device for displaying an image other than the rear of the machine body 2 on the display unit 84A may be appropriately provided in the cabin 5, the machine body 2, the cover device 14, or the like.

The information necessary for making various settings of the work machine 1 is, for example, information necessary for machine settings such as height control settings, AI control settings, and arm limit settings.
A plurality of operation switches (first switch 84B, second switch 84C, third switch 84D) are provided below the display unit 84A of the monitor 84.
The first switch 84B is, for example, a switch for changing the rotation speed of the prime mover E1. The rotation speed can be changed step by step. Further, the rotation speed may be changed continuously.

The second switch 84C is, for example, a switch for setting the working speed of the working machine 1. The working speed can be set in stages. The working speed setting may be continuously changeable. The working speed is, for example, the swing speed of the boom 22, the arm 23, the bucket 24, and the swing bracket 21, and the turning speed of the machine body 2. Further, the second switch 84C may be a switch for switching between an inoperable state in which the operation target of the control member 82 cannot be operated and an operable state in which the operation target of the control member 82 can be operated. .. In this case, the second switch 84C may also serve as an indicator lamp indicating whether the operation is inoperable or operable. Further, the second switch 84C may be a switch that serves both for setting the working speed and switching between the inoperable state and the operable state.

The third switch 84D is a switch for turning on and off a light, for example, a boom light, a headlight, a backlight, etc., provided in the work machine 1. Further, the third switch 84D may be a key switch for starting the prime mover E1. Further, the third switch 84D may also serve as a key switch and a switch for turning the light on and off.
The state operated by the first switch 84B, the second switch 84C, and the third switch 84D may be displayed on the display unit 84A.

As shown in FIG. 13, on the left side of the first steering wheel 82L (monitor 84), there are a plurality of operating tools (first operating tool 44A, second operating tool 44B) for operating display items displayed on the screen. A third operating tool 44C) is provided. The second operating tool 44B and the third operating tool 44C are arranged side by side in the machine width direction K2 in front of the first operating tool 44A. For example, the first operating tool 44A is an operating tool capable of rotating, and the second operating tool 44B and the third operating tool 44C are switches capable of pressing. The first operation tool 44A changes the selection item candidate among the plurality of selection items displayed on the display unit 84A by performing the rotation operation. The selection item is determined by pressing the third operation tool 44C. Further, the second operating tool 44B cancels the selected item determined by the pressing operation.

The first operating tool 44A, the second operating tool 44B, and the third operating tool 44C may be provided on the right side of the first steering handle 82L (monitor 84). Further, the change of the selection item candidate, the determination of the selection item, and the cancellation of the selection item may be performed by a single operation tool. Further, the display unit 84A may have a touch panel that also serves as a display and an operation tool, that is, a touch operation unit that accepts a touch operation on the display unit by an operator.

The driver can easily attach the elbow to the elbow rest member 83 (centering on the elbow) from the control member 82 to the monitor 84 (display unit 84A, first switch 84B, second switch 84C, third switch 84D, etc.). You can move your hand to. Further, the display unit 84A, the first switch 84B, the second switch 84C, the third switch 84D, and the like can be operated with the elbow attached to the elbow rest member 83.

Further, with the elbow attached to the first armrest 83L, the hand can be easily moved from the first control handle 82L to the first operating tool 44A, the second operating tool 44B, and the third operating tool 44C. Further, the first operating tool 44A, the second operating tool 44B, and the third operating tool 44C can be easily operated while the elbow is attached to the elbow rest member 83.
A stop switch 102 for stopping the prime mover E1 is provided on the right side of the second steering wheel 82R (monitor 84). It is easy to move the hand from the second control handle 82R to the stop switch 102 while keeping the elbow on the second armrest 83R. Further, as shown in FIG. 6, an outlet 67 is provided in front of the monitor 84.

The traveling operation member 85 is a pedal that operates the traveling device 3 by stepping on the pedal.
As shown in FIGS. 6 and 13, the traveling operation member 85 includes a first traveling pedal 85L arranged in front of one side of the driver's seat 6 in the aircraft width direction K2, and the driver's seat 6 in the aircraft width direction K2. It includes a second traveling pedal 85R arranged in front of the other side portion. The first traveling pedal 85L is a pedal that operates the first traveling device 3L (first traveling motor M1). The second traveling pedal 85R is a pedal that operates the second traveling device 3R (second traveling motor M2).

The first traveling pedal 85L and the second traveling pedal 85R are pedals for operating the forward and reverse movements and steering of the working machine 1. That is, when the first traveling pedal 85L and the second traveling pedal 85R are stepped forward, the vehicle moves forward, and when the pedal is depressed backward, the vehicle moves backward. Further, if the depressing direction and the depressing amount of the first traveling pedal 85L and the second traveling pedal 85R are the same, the vehicle travels straight, and if the depression amounts of the first traveling pedal 85L and the second traveling pedal 85R are different, the vehicle travels in a turning manner. The rotation speed of the first traveling motor M1 can be changed by the depression amount of the first traveling pedal 85L, and the rotation speed of the second traveling motor M2 can be changed by the depression amount of the second traveling pedal 85R.

In the working machine 1 of the present embodiment, when traveling straight, the first traveling pedal 85L and the second traveling pedal 85R are stepped on to the maximum position (solid stepping) in order to obtain straightness. The traveling speed can be changed by the acceleration / deceleration switch provided on the control member 82.
As shown in FIG. 13, the acceleration / deceleration switches are the deceleration switch 106 provided on the first steering handle 82L and the acceleration switch 107 provided on the second steering handle 82R. The driver can increase or decrease the traveling speed of the working machine 1 while holding the control member 82. The speed-increasing switch 107 is a switch that increases the traveling speed. The speed-increasing switch 107 is, for example, a momentary switch, and the shift stage increases each time the switch is pressed. The deceleration switch 106 is a switch that reduces the traveling speed. The decrease switch 106 is, for example, a momentary switch, and the shift stage is decreased each time the switch is pressed. The increase and decrease of the traveling speed may be continuous. That is, the speed is reduced while the deceleration switch 106 is pressed, and the speed is increased while the speed increase switch 107 is pressed.

As shown in FIGS. 4 and 6, a footrest portion 79 for placing the driver's foot is provided on the floor portion 5B on the side of the driver's seat 6 (seat stand 77). The footrest portion 79 is a first portion 79L on one side (left side) of the driver's seat 6 and the seat stand 77, and a second portion 79L on the other side (right side) of the driver's seat 6 and the seat stand 77. Includes portion 79R.
As shown in FIG. 6, the first traveling pedal 85L is located in front of the first portion 79L, and the second traveling pedal 85R is located in front of the second portion 79R. There is nothing that hinders the movement of the foot between the first running pedal 85L and the first portion 79L, and the foot can move from the first running pedal 85L to the first portion 79L on the floor portion 5B. In addition, there is nothing that hinders the movement of the foot between the second running pedal 85R and the second part 79R, and the foot can move from the second running pedal 85R to the second part 79R on the floor portion 5B. be.

When the driver puts his / her foot on the footrest portion 79, the driver bends his / her legs so that his / her feet are located behind the knees, and the driver can rest his / her legs in this posture when he / she does not operate the traveling device 3. .. In addition, since the upper body is in a forward leaning posture during driving, the posture becomes easier by positioning the legs backward.
Further, the footrest portion 79 has a front-rear length corresponding to the front-rear position adjustment of the driver's seat 6. That is, the footrest portion 79 has a front-rear length that allows the driver's foot to move in response to the movement of the driver's seat 6 even if the position of the driver's seat 6 is adjusted back and forth.

As shown in FIG. 13, the first traveling pedal 85L is provided below one side portion (first extending portion 93L) of the body width direction K2 of the mounting base 93, and the second traveling pedal 85R is the mounting base 93. It is provided below the other side portion (second extending portion 93R) of the aircraft width direction K2. When operating the traveling operation member 85, the driver's leg is inserted below the mounting base 93. That is, the left leg is inserted between the first extending portion 93L and the first traveling pedal 85L, and the right leg is inserted between the second extending portion 93R and the second traveling pedal 85R.

As shown in FIG. 13, the mutual distance between the first traveling pedal 85L and the second traveling pedal 85R in the body width direction K2 gradually increases toward the front. Further, the rear portion of the first traveling pedal 85L is located below one side portion of the driver's seat 6 in the body width direction K2. Specifically, the rear end portion of the first traveling pedal 85L overlaps the front end portion of the left portion of the seat portion 6A in a plan view. Further, the rear portion of the second traveling pedal 85R is located below the other side portion of the driver's seat 6 in the body width direction K2. Specifically, the rear end portion of the second traveling pedal 85R overlaps the front end portion of the right portion of the seat portion 6A in a plan view.

As shown in FIGS. 12 and 16, the first traveling pedal 85L and the second traveling pedal 85R have an inclined shape (forward tilting shape) in which the first traveling pedal 85L and the second traveling pedal 85R shift downward as they go forward. Since the driver operates the control member 82 with the upper body tilted forward, the first traveling pedal 85L and the second traveling pedal 85R are tilted forward, so that the pedal can be easily depressed.
As shown in FIGS. 12 and 13, the first traveling pedal 85L is supported by the first pedal shaft 104L so as to be swingable back and forth. The first pedal shaft 104L is located on the upper surface side of the first traveling pedal 85L. Further, the first pedal shaft 104L is arranged behind the front / rear center portion of the first traveling pedal 85L. Further, the first pedal shaft 104L is arranged in an inclined shape that shifts to the outside of the machine body toward the rear, and is parallel to the direction orthogonal to the longitudinal direction of the first traveling pedal 85L.

The second traveling pedal 85R is supported by the second pedal shaft 104R so as to be swingable back and forth. The second pedal shaft 104R is located on the upper surface side of the second traveling pedal 85R. Further, the second pedal shaft 104R is arranged behind the front / rear center portion of the second traveling pedal 85L. Further, the second pedal shaft 104R is arranged in an inclined shape that shifts to the outside of the machine body toward the rear, and is parallel to the direction orthogonal to the longitudinal direction of the second traveling pedal 85R.

The first pedal shaft 104L and the second pedal shaft 104R are located at positions corresponding to the arch when the driver puts his / her foot on the first running pedal 85L and the second running pedal 85R.
FIG. 16 shows a side view of the first traveling pedal 85L, and FIG. 17 shows a plan view of the first traveling pedal 85L. Since the support structure of the second travel pedal 85R is the same as the support structure of the first travel pedal 85L, the support structure of the first travel pedal 85L will be described, and the description of the support structure of the second travel pedal 85R will be omitted.

As shown in FIGS. 16 and 17, the first pedal shaft 104L (second pedal shaft 104R) includes a tubular rotating shaft 109 fixed to the first traveling pedal 85L (second traveling pedal 85R) and a rotating shaft. It has a support shaft 110 inserted through 109. The support shaft 110 is fixed to the pedal brackets 108A and 108B erected on the floor portion 5B. The pedal bracket 108A is located outside the machine body of the first pedal shaft 104L, and the pedal bracket 108B is located inside the machine body of the first pedal shaft 104L.

The first traveling pedal 85L (second traveling pedal 85R) is supported by the floor portion 5B so as to be swingable back and forth via the first pedal shaft 104L and the pedal brackets 108A and 108B.
Further, the first traveling pedal 85L is swing-controlled by the pedal regulation mechanism 114. The pedal regulation mechanism 114 includes a rod member 116 and a holder member 11 that supports the rod member 116.
7 and a transmission mechanism 118 that transmits the movement of the first traveling pedal 85L to the rod member 116.

The rod member 116 is arranged below the first traveling pedal 85L and on the lower surface side of the floor portion 5B along the floor portion 5B. The front portion of the rod member 116 is inserted through the holder member 117. The holder member 117 has a support portion 117A that slidably supports the rod member 116 in the axial direction, and an accommodating portion 117B.
In the accommodating portion 117B, spring receiving members 119A and 119B engaged with the rod member 116 and a urging member 120 provided in a compressed manner between the spring receiving member 119A and the spring receiving member 119B are provided. There is. The urging member 120 is formed by a coil spring, and the rod member 116 is inserted through the urging member 120. A mounting piece 122 is fixed to the front portion of the holder member 117, and the mounting piece 122 is pivotally supported by a stay 121 fixed to the lower surface of the floor portion 5B.

The transmission mechanism 118 includes a link 123, a first arm 124, a rotating member 125, and a second arm 126. The upper end of the link 123 is pivotally supported by a mounting piece 127 fixed on the lower surface of the first traveling pedal 85L and on the front side of the first pedal shaft 104L. The link 123 is inserted through an insertion hole 128 formed through the floor portion 5B, and its lower end side is pivotally supported by the first arm 124. The first arm 124 is fixed to a rotating member 125 rotatably supported by a stay 129 fixed to the lower surface of the floor portion 5B. The second arm 126 is fixed to the rotating member 125 and is pivotally supported on the rear end side of the rod member 116.

When the first traveling pedal 85L is stepped forward, the link 123 is pushed downward, and the first arm 124, the rotating member 125, and the second arm 126 rotate integrally to push the rod member 116 forward. Then, the spring receiving member 119A moves integrally with the rod member 116 to compress the urging member 120. When the spring receiving member 119A comes into contact with the spring receiving member 119B, the swing of the first traveling pedal 85L in the stepping direction on the front side is restricted.

Further, when the first traveling pedal 85L is stepped on the rear side, the link 123 is pulled upward, and the first arm 124, the rotating member 125, and the second arm 126 are integrally rotated to pull the rod member 116 backward. .. Then, the spring receiving member 119B moves integrally with the rod member 116 to compress the urging member 120. When the spring receiving member 119B comes into contact with the spring receiving member 119A, the swing of the rear side of the first traveling pedal 85L in the stepping direction is restricted.

When the stepping forward or backward of the first traveling pedal 85L is released, the urging member 120 returns the first traveling pedal 85L to the neutral position. An operating load is applied to the first traveling pedal 85L by the urging member 120.
Further, in the first traveling pedal 85L, the depression amount and the depression direction are detected by the angle sensor 131. The angle sensor 131 is formed by, for example, a potentiometer. The angle sensor 131 detects the depression amount and the depression direction of the first traveling pedal 85L by detecting the rotation angle and the rotation direction of the rotating member 125. The detection signal from the angle sensor 131 is sent to the control device U1. The control device U1 controls the control valve that controls the first traveling motor M1 based on the detection signal of the angle sensor 131.

Further, the front portion of the first traveling pedal 85L is supported by a damper device 132 in order to give a natural pedal operation feeling.
The dozer lever 80 is an operation lever for operating the dozer device 7.
As shown in FIGS. 18 and 19, the dozer lever 80 has a grip 80A gripped by the driver and a lever shaft 80B to which the grip 80A is attached. As shown in FIG. 13, the dozer lever 80 is provided on the right side of the mounting base 93. A notch 130 for avoiding interference with the lever regulation mechanism 136, which will be described later, is provided on the right side of the mounting base 93.

As shown in FIGS. 18 and 19, the dozer lever 80 is supported by the lever support portion 134. The lever support portion 134 has a support bracket 134A fixed to the upper surface of the mounting base 93, a support cylinder 134B fixed to the support bracket 134A, and a rotating member 134C rotatably supported by the support cylinder 134B. The lower end of the lever shaft 80B is fixed to the rotating member 134C. As a result, the dozer lever 80 is supported on the mounting base 93 so as to be swingable back and forth.

As shown in FIGS. 18 and 19, a lever regulation mechanism 133 for restricting the swing of the dozer lever 80 is provided on the lower surface side of the mounting base 93. The lever support mechanism 133 includes a rod member (interlocking member) 135, a holder member 136 that supports the rod member 135, and an interlocking arm 137 that transmits the movement of the dozer lever 80 to the rod member 135.
The rod member 135 is arranged on the lower surface side of the mounting base 93 and along the lower surface. The rear portion of the rod member 135 is inserted through the holder member 136. The front portion of the rod member 135 is pivotally supported by the tip end portion (lower end portion) of the interlocking arm 137. The base end portion (upper end portion) of the interlocking arm 137 is fixed to the rotating member 134C. Therefore, the rod member 135 moves following the swing of the dozer lever 80.

The holder member 136 has a support portion 136A that slidably supports the rod member 135 in the axial direction, and a housing portion 136B. In the accommodating portion 136B, spring receiving members 140A and 140B engaged with the rod member 135, and a neutral spring 141 compressedly provided between the spring receiving member 140A and the spring receiving member 140B are provided. .. The neutral spring 141 is formed by a coil spring, and a rod member 135 is inserted through the neutral spring 141. That is, the neutral spring 141 is provided along the rod member 135. A mounting piece 142 is fixed to the rear portion of the holder member 136, and the mounting piece 142 is pivotally supported by a stay 143 fixed to the lower surface of the mounting base 93.

When the dozer lever 80 is swung forward, the interlocking arm 137 swings rearward and the rod member 135 is pushed rearward and along the lower surface of the mounting base 93. Then, the spring receiving member 140A moves integrally with the rod member 135 to compress the neutral spring 141. When the spring receiving member 140A comes into contact with the spring receiving member 140B, the swing of the dozer lever 80 to the front side is restricted.

Further, when the dozer lever 80 is swung to the rear side, the interlocking arm 137 swings forward and the rod member 135 is pulled forward and along the lower surface of the mounting base 93. Then, the spring receiving member 140B moves integrally with the rod member 135 to compress the neutral spring 141. When the spring receiving member 140B comes into contact with the spring receiving member 140A, the swing of the dozer lever 80 to the rear side is restricted.

The swing of the dozer lever 80 is restricted by the rod member 135 moving in a predetermined range in the direction along the lower surface of the mounting base 93.
When the swing operation of the dozer lever 80 is released, the neutral spring 141 returns the dozer lever 80 from the swinging position to the neutral position. Further, the neutral spring 141 applies an operating load to the dozer lever 80.

Further, the dozer lever 80 detects the swing amount and the swing direction by the angle sensor 144. The angle sensor 144 is formed by, for example, a potentiometer. The angle sensor 144 detects the depression amount and the depression direction of the first traveling pedal 85L by detecting the rotation angle and the rotation direction of the rotating member 125. The detection signal from the angle sensor 144 is sent to the control device U1. The control device U1 controls a control valve that controls the dozer cylinder based on the detection signal of the angle sensor 144.

As shown in FIG. 21, a front support frame (support frame) 146 and a rear support frame (support frame) 147 are provided on the other side (right portion) of the body width direction K2 of the swivel board 9. .. The front support frame 146 is provided on the front side of the swivel board 9, and the rear support frame 147 is provided on the rear side of the swivel board 9. The cover device 14 and the like are supported by the front support frame 146 and the rear support frame 147.

As shown in FIG. 22, the front support frame 146 is the upper portions of the first front strut 146A and the second front strut 146B arranged side by side in the machine width direction K2, and the first front strut 146A and the second front strut 146B. It has a front beam member 146C and a front beam member 146C for connecting the above. The first front column 146A is located on the right side of the vertical rib 9R and is erected on the swivel substrate 9 via the base plate 146D. The second front support column 146B is located on the right end side of the swivel board 9, and is erected on the swivel board 9 via the base plate 146E.

As shown in FIG. 23, the rear support frame 147 includes a first rear strut (first strut) 147A, a second rear strut (second strut) 147B, a third rear strut 147C, and a first rear beam member ( It has a beam member) 147D, a second rear beam member 147E, and an upper frame member 147F.
The first rear strut 147A, the second rear strut 147B, and the third rear strut 147C are arranged side by side in the aircraft width direction K2. The first rear support column 147A is located on the right side of the vertical rib 9R and is erected on the swivel board 9 via the base plate 147G. The second rear support column 147B is located on the right end side of the swivel board 9, and is erected on the swivel board 9 via the base plate 147H. The third rear strut 147C is located on the left side of the first rear strut 147A and substantially at the center of the swivel board 9 in the machine width direction K2, and is erected on the swivel board 9 via the base plate 147I. The first rear beam member 147D connects the upper portions of the first rear strut 147A and the second rear strut 147B to each other. The second rear beam member 147E connects the upper portions of the second rear strut 147B and the third rear strut 147C to each other. The upper frame member 147F projects rearward from the left end portion of the second rear beam member 147E.

As shown in FIG. 25, a radiator R1, an oil cooler O1, a condenser D1 (referred to as a cooling equipment unit), and a first cover body 15 for covering the cooling equipment unit are arranged on the front side of the front support frame 146.
The first cover body 15 includes a first side surface portion 15a that covers the left side of the cooling equipment unit, a second side surface portion 15b that covers the right side, an upper surface portion 15c that covers the upper side, and a front surface portion that covers the front. It has 15d, and the lower part and the rear part are open. Further, the rear upper portion of the first cover body 15 is pivotally supported by the front beam member 146C of the front support frame 146 via a hinge or the like (not shown), and the front portion of the first cover body 15 is swung up and down to obtain a cooling device unit. Open and close the placement part.

In FIG. 25, reference numeral Z1 indicates a state in which the first cover body 15 is closed, and reference numeral Z2 indicates a state in which the first cover body 15 is closed. By lifting the first cover body 15 upward and opening it, the arrangement portion of the cooling equipment unit can be opened (in front of the oil cooler O1 and the condenser D1). The outside air intake port 19 formed on the front side surface of the first cover body 15 (the front portion of the second side surface portion 15b) is located on the front side of the condenser D1. Further, there is no provision between the outside air intake port 19 and the condenser D1 that greatly obstructs the flow of the cooling air (outside air) flowing from the outside air intake port 19 to the condenser D1.

As shown in FIGS. 26 and 27, the radiator R1 is attached to the radiator bracket 148. The radiator bracket 148 is attached to the front support frame 146. A shroud 176 is attached to the back side of the radiator R1. The shroud 176 is located inside the front support frame 146.
As shown in FIGS. 30 to 32, the radiator bracket 148 has a first bracket 149 attached to the upper part of the front support frame 146 and a second bracket 150 attached to the lower part of the front support frame 146. The radiator R1 is provided between the first bracket 149 and the second bracket 150. The mounting stay 151L is fixed to one side portion (left portion) of the lower surface of the front beam member 146C in the machine width direction K2, and the mounting stay 151R is fixed to the other side portion (right portion).

The first bracket 149 has a first mounting portion 152L and a first mounting portion 152R provided side by side in the machine width direction K2, and a connecting plate 153 connecting the first mounting portions 152L and 152R to each other. The left portion of the first mounting portion 152L and the connecting plate 153 is attached to the mounting stay 151L, and the right portion of the first mounting portion 152R and the connecting plate 153 is attached to the mounting stay 151R.

The first mounting portions 152L and 152R are projected forward from the front support frame 146. Further, the first mounting portions 152L and 152R include a first portion 154a connected to the connecting plate 153, a second portion 154b arranged in front of the first portion 154a at intervals, and a first portion 154a and a first portion. It has a third site 154c that connects the lower ends of the two sites 154b. The third portion 154c is provided with an upper support portion 156 made of an elastic member that supports the upper portion of the radiator R1.

The second bracket 150 is a mounting wall 150L mounted on the lower part of the first front strut 146A.
And a mounting wall 150R mounted at the bottom of the second front column 146A. The mounting walls 150L and 150R are projected forward from the front support frame 146. A front receiving wall 157 is provided over the front portion of the mounting wall 150L and the front portion of the mounting wall 150R, and a rear receiving wall 158 is provided over the rear portion of the mounting wall 150L and the rear portion of the mounting wall 150R.

A second mounting portion 159L is provided on one side of the front receiving wall 157 in the body width direction K2, and a second mounting portion 159R is provided on the other side. The second mounting portions 159L and 159R are provided on the lower side of the first mounting portions 152L and 152R. The second mounting portions 159L and 159R are formed of elastic members and have open insertion holes 161 above and below.
The rear support wall 158 is provided with a lower support portion 160 made of an elastic member that supports the lower portion of the radiator R1. The second mounting portions 159L and 159R are provided below the lower support portion 160.

As shown in FIGS. 26 and 27, the oil cooler O1 is attached to the oil cooler bracket 162. The condenser D1 is attached to the oil cooler bracket 162. The oil cooler bracket 162 is detachably attached to the radiator bracket 148.
As shown in FIG. 25, a moving space 163 for moving the oil cooler O1 and the condenser D1 is formed on the side opposite to the radiator R1 with respect to the oil cooler O1 and the condenser D1. Therefore, as shown in FIGS. 28 and 29, the oil cooler O1 can be moved to a position separated from the first position by removing the oil cooler bracket 162 from the radiator bracket 148, and by moving the oil cooler O1. A cleaning space 164, which is a sufficient space for cleaning the radiator R1 and the oil cooler O1, is formed between the radiator R1 and the oil cooler O1.

As shown in FIGS. 30 to 32, the oil cooler bracket 162 is a connecting bracket 167L, 167R that connects the upper bracket 165, the lower bracket 166 arranged below the upper bracket 165, and the upper bracket 165 and the lower bracket 166. And have. The connecting bracket 167L connects the left side of the upper bracket 165 and the lower bracket 166 to each other. Connecting bracket 167R The upper bracket 165 and the lower bracket 166 are connected to each other on the right side.

The oil cooler O1 is arranged on the front side of the oil cooler bracket 162, and the upper portion is fixed to the upper bracket 165 and the lower portion is fixed to the lower bracket 166 (see FIG. 26).
The upper bracket 165 is detachably fixed to the second portion 154b of the first mounting portion 152L by the fixing tool 145L, and is detachably fixed to the second portion 154b of the first mounting portion 152R by the fixing tool 145R. It has a fixed portion 165R to be formed. Fixtures 145L and 145R are, for example, bolts. By using the fixing tool as a hook band, the fixing portions 165L and 165R can be detachably fixed to the first mounting portions 152L and 152R without tools. In this case, the fixing portion is configured by a pin and the first mounting portion is movably configured by a hinge. In order to fix the fixed portion to the first mounting portion, the first mounting portion is lowered from above with respect to the fixed portion and engaged with the fixed portion via the rubber mount. In that state, the fixing portion is stopped with respect to the first mounting portion by the hook band.

The lower bracket 166 has an engaging portion 168L that engages and disengages with the second mounting portion 159L, and an engaging portion 168R that engages and disengages with the second mounting portion 159R. The engaging portions 168L and 168R have an engaging member 169 inserted into the insertion hole 161 from above, and an abutting portion 170 that abuts on and receives the upper surface of the second mounting portions 159L and 159R. The engaging member 169 is formed of a pin. The contact portion 170 is made of a plate material.

The lower part of the oil cooler bracket 162 can be easily attached to and removed from the lower part of the radiator bracket 148 by inserting and removing the engaging member 169 in the vertical direction with respect to the insertion hole 161.
As shown in FIGS. 26 and 27, a condenser bracket 171 is attached to the oil cooler bracket 162. A capacitor D1 is attached to the capacitor bracket 171.

As shown in FIGS. 30 to 32, the capacitor bracket 171 has arm portions 172a to 172d protruding from above and below the connecting brackets 167L and 167R. The tip portions of the arm portion 172a and the arm portion 172b are connected to each other by the upper cross member 173A, and the tip portions of the arm portion 172c and the arm portion 172d are connected to each other by the lower cross member 173B. The left portions of the upper horizontal member 173A and the lower horizontal member 173B are connected to each other by the first vertical member 174L, and the right portions of the upper horizontal member 173A and the lower horizontal member 173B are connected to each other by the second vertical member 174R.

The first vertical member 174L is provided with a mounting piece 175a and a mounting piece 175c, and the second vertical member 174L is provided with a mounting piece 175b and a mounting piece 175d. As shown in FIG. 27, the capacitor D1 is attached to the attachment piece 175a to the attachment piece 175d.
As shown in FIGS. 26 and 27, a hose guide 177 is provided on the left side of the oil cooler bracket 162.

As shown in FIG. 25, a cutout portion 180 cut out in order to avoid interference with the hose guide 177 is formed in the lower portion of the trailing edge portion of the first side surface portion 15a of the first cover body 15. .. The hose guide 177 projects from the inside of the first cover body 15 toward the inside of the machine body through the notch 180. The hose guide 177 is inserted with hydraulic hoses 178A and 178B for circulating hydraulic oil and refrigerant hoses 179A and 179B for circulating a refrigerant for an air conditioner. The hydraulic hoses 178A, 178B and the refrigerant hoses 179A, 179B (hereinafter, also simply referred to as hoses) are introduced into the inside of the first cover body 15 from the machine body side of the first cover body 15 via the hose guide 177. The hydraulic hoses 178A and 178B are connected to the oil cooler O1, and the refrigerant hoses 179A and 179B are connected to the condenser D1.

By introducing the hose from the side (side of the machine body side), the hose does not get in the way when removing the oil cooler bracket 162 from the radiator bracket 148, and the oil cooler bracket 162 is attached to the radiator bracket 148. It can be separated smoothly. Further, by introducing these hoses from the side, the hose can be easily moved (sufficiently flexed) when the oil cooler O1 is separated from the radiator R1, and the distance between the radiator R1 and the oil cooler O1 is sufficient. Can be opened in.

As shown in FIGS. 33 and 34, the bonnet 16 has a first bonnet side portion 181 and a second bonnet side portion 182, a bonnet upper portion 183, and a bonnet rear portion 184.
The first bonnet side portion 181 covers the machine body side (driver's seat side) of the motor E1, and forms the side surface of the motor room ER on the machine body side. The second bonnet side portion 182 covers the machine body outer side (the side opposite to the driver's seat 6) of the motor E1 and forms the side surface of the motor room ER on the machine body outer side. The first bonnet side portion 181 and the second bonnet side portion 182 form a side surface of the prime mover chamber ER in a direction substantially perpendicular to the flow direction of air (cooling air) flowing on the prime mover chamber ER.

The upper portion 183 of the bonnet covers the upper part of the motor E1 and forms the upper surface (ceiling portion) of the motor chamber ER. The rear portion 184 of the bonnet is a wall portion provided on the side where the hydraulic pump P1 is arranged, covers the rear of the prime mover E1, and forms the back surface of the prime mover chamber ER.
The front side of the prime mover room ER is provided with a front support frame 146, a shroud 176, a partition member for partitioning between the front support frame 146 and the inner surface of the bonnet 16, and a partition member for partitioning between the front support frame 146 and the shroud 176. It is separated from the inside of the first cover body 15. The lower surface side of the bonnet 16 is open, and the lower surface (bottom portion) of the prime mover chamber ER is formed by the swivel substrate 9. Therefore, the prime mover chamber ER is formed on the swivel substrate 9. The prime mover E1 is vibration-proof supported in the prime mover chamber ER by a mount member (not shown).

As shown in FIGS. 35 and 36, the first bonnet side portion 181 is formed of a plate material and has a first side plate 181A and a lid plate 181B which are main members. The first bonnet side portion 181 is formed in a flat plate shape (or a surface shape that smoothly changes along the flow direction of the cooling air), and does not obstruct (rectify) the flow of the cooling air that cools the prime mover E1. The first bonnet side portion 181 is arranged close to the prime mover E1. As a result, the flow of the cooling air flowing on the left side of the prime mover E1 is improved, and the cooling efficiency can be improved.

As shown in FIG. 33, the first side plate 181A has an opening 181C for inspecting the motor E1, and the opening 181C is formed so as to penetrate the first side plate 181A. As shown in FIG. 35, the opening 181C is closed by the lid plate 181B, and the lid plate 181B is detachably attached to the first side plate 181A by bolts or the like.
As shown in FIG. 21, the first bonnet side portion 181 (first side plate 181A) is provided from the front support frame 146 to the rear support frame 147. As shown in FIG. 22, the front portion of the first bonnet side portion 181 is fixed to the first front support column 146A. As shown in FIG. 23, the rear portion of the first bonnet side portion 181 is fixed to the first rear strut 147A.

As shown in FIGS. 21 and 33, the first bonnet side portion 181 projects forward from the front support frame 146. The leading edge portion of the first bonnet side portion 181 is close to the trailing edge portion of the first side surface portion 15a of the first cover body 15. As shown in FIG. 25, a notched portion 181D cut out in order to avoid interference with the hose guide 177 is formed in the lower portion of the leading edge portion of the first bonnet side portion 181. The notch 181D cooperates with the notch 180 to form an insertion portion through which the hose guide 177 is inserted.

As shown in FIGS. 35 and 36, a first lower cover mounting portion 186 and a first rear cover mounting portion 187 are provided on the inner surface side (right surface side) of the first bonnet side portion 181. The first lower cover mounting portion 186 is provided on the upper part of the inner surface (above the opening 181C) of the first bonnet side portion 181. The first lower cover mounting portion 186 has a first portion 186A at the front portion, a second portion 186B at the intermediate portion, and a third portion 186C at the rear portion.

The front portion of the first portion 186A is provided on the rear side of the upper end portion of the first front support frame 146 in an upwardly inclined shape (inclined shape that shifts upward as it goes backward). The middle portion of the first portion 186A is formed horizontally toward the rear. The rear portion of the first portion 186A is formed in a backward downward inclined shape (inclined shape that shifts downward as it goes backward).
The second site 186B is formed horizontally from the rear end of the first site 186A toward the rear. The third site 186C is formed in a zigzag shape that extends upward from the rear end of the second site 186B and is bent back and forth.

The first rear cover mounting portion 187 is provided at the rear portion of the first bonnet side portion 181 and behind the third portion 186C. Further, the first rear cover mounting portion 187 is provided from the upper end to the lower end of the first bonnet side portion 181. The upper portion 187A of the first rear cover mounting portion 187 is formed so as to project forward. The upper portion 187A protrudes corresponding to a portion recessed toward the front of the upper portion of the third portion 186C. The intermediate portion 187B of the first rear cover mounting portion 187 extends in the vertical direction along the trailing edge portion of the first bonnet side portion 181 and at the lower end portion has a forward downward inclination (moves forward as it goes downward). It is said to be inclined). The lower portion 187C of the first rear cover mounting portion 187 is provided so as to extend in the vertical direction.

As shown in FIGS. 35 and 36, a first gutter portion 188 and a second gutter portion 189 are provided on the outer surface side (left surface side) of the first bonnet side portion 181. The first gutter portion 188 and the second gutter portion 189 are formed of a groove type member. The first gutter portion 188 is located above the opening 181C, has a rearward rising slope from the front end to the rear end (a slope that shifts upward as it goes backward), and is open upward. Further, the rear end portion of the first gutter portion 188 extends in the vertical direction, and the front side is open.

The second gutter portion 189 is provided so as to extend in the vertical direction along the upper portion of the front edge portion of the first bonnet side portion 181 and has an opening on the front side.
As shown in FIG. 21, the third cover body 17 is provided on the side of the driver's seat 6 (cabin 5) side of the first bonnet side portion 181. In the present embodiment, the third cover body 17 is arranged on the left side of the first bonnet side portion 181. Further, the third cover body 17 (the side surface of the third cover body 17 on the prime mover E1 side) is arranged so as to be adjacent to and face the first bonnet side portion 181 in the body width direction K2. Further, the third cover body 17 covers the side of the first bonnet side portion 181. Further, the third cover body 17 has the cabin 5 and the body width direction K.
It is arranged adjacent to 2.

By providing the third cover body 17 between the first bonnet side portion 181 and the cabin 5, the sound of the prime mover E1 is suppressed from being transmitted to the driver's seat 6 side. That is, the structure on the driver's seat 6 side of the prime mover room ER is a double sound insulation structure by the first bonnet side portion 181 and the third cover body 17. As a result, it is possible to suppress the sound of the prime mover E1 from propagating to the driver's seat 6 side.
As shown in FIG. 37, the upper part of the rear end of the third cover body 17 is attached to the second rear beam member 147E of the rear support frame 147 by a hinge 190. As a result, the third cover body 17 can swing from the closed position shown in FIG. 37 to the open state shown by the virtual line.

The third cover body 17 has a first side surface portion 17A located on the first bonnet side portion 181 side, a second side surface portion 17B on the side opposite to the first bonnet side portion 181 and a first hydraulic device arrangement portion 13. It has an upper surface portion 17C that covers the upper part of the arrangement portion 13A and a front surface portion 17D that covers the front of the first arrangement portion 13A, and the lower and rear portions are open.
As shown in FIG. 37, the first side surface portion 17A is formed with a notch portion 191 formed from a first notch edge portion 191a and a second notch edge portion 191b. The first notched edge portion 191a is formed in a downward inclined shape along the first gutter portion 188. The second notched edge portion 191b is formed in an inclined shape so as to move forward from the front end of the first notched edge portion 191a toward the lower side. Further, the second notch edge portion 191b is arranged in front of the second gutter portion 189 at intervals. The gap 192 formed by the first notched edge portion 191a and the second gutter portion 189 is used as a passage through which the hydraulic hoses 178A and 178B and the refrigerant hoses 179A and 179B pass. The space between the first notch edge portion 191a and the first gutter portion 188 and the space between the second notch edge portion 191b and the second gutter portion 189 are sealed by a sealing material.

As shown in FIG. 34, the second bonnet side portion 182 has a second side plate (side plate) 182A and an openable / closable bonnet 193. The opening / closing bonnet 193 is arranged on the outer side of the machine body of the second side plate 182A.
As shown in FIGS. 38 and 39, the second side plate 182A is formed into a flat plate shape (or a surface shape that smoothly changes along the flow direction of the cooling air) by the plate material, and is an inspection hole for inspecting the prime mover E1. It has 182B. The inspection hole 182B is formed so as to penetrate the second side plate (side plate) 182A. Further, as shown in FIGS. 38 and 42, a notch portion 182C recessed downward is formed in the rear portion of the upper portion of the second side plate 182A.

As shown in FIG. 21, the second side plate 182A is provided from the front support frame 146 to the rear support frame 147. As shown in FIG. 22, the front portion of the second side plate 182A is fixed to the second front support column 146B. As shown in FIG. 23, the rear portion of the second side plate 182A is fixed to the second rear support column 147B.
As shown in FIGS. 38 and 39, a second lower cover mounting portion 194 and a second rear cover mounting portion 195 are provided on the inner surface side (left surface side) of the second side plate 182A. The second lower cover mounting portion 194 is provided on the upper part of the inner surface of the second side plate 182A (above the inspection hole 182B).

The second lower cover mounting portion 194 has a first portion 194A in the front portion, a second portion 194B in the middle portion, and a third portion 194C in the rear portion, and has a first lower cover mounting portion 186 in a side view. It is formed in a similar shape.
That is, the front portion of the first portion 194A is provided on the rear side of the upper end portion of the first front support frame 146 in an upwardly inclined shape. The middle portion of the first portion 194A is formed horizontally toward the rear. The rear portion of the first portion 194A is formed in a downward-sloping shape.

The second portion 194B is formed horizontally from the rear end portion of the first portion 194A toward the rear. The third portion 194C is formed in a zigzag shape that extends upward from the rear end portion of the second portion 194B and is bent back and forth.
The second rear cover mounting portion 195 is provided at the rear portion of the second side plate 182A and behind the third portion 194C. Further, the second rear cover mounting portion 195 is provided from the upper end to the lower end of the second side plate 182A. The second rear cover mounting portion 195 has an upper portion 195A, an intermediate portion 195B, and a lower portion 195C, and is formed in the same shape as the first rear cover mounting portion 187 in a side view.

The upper portion 195A of the second rear cover mounting portion 195 is formed so as to project forward. The upper portion 195A protrudes corresponding to a portion recessed toward the front of the upper portion of the third portion 194C. The intermediate portion 195B of the second rear cover mounting portion 195 extends in the vertical direction along the trailing edge portion of the second side plate 182A and is inclined forward downward at the lower end portion. The lower portion 195C of the second rear cover mounting portion 195 is provided so as to extend in the vertical direction.

As shown in FIGS. 40 and 41, the opening / closing bonnet 193 has a double structure having an outer cover member 193A which is a wall portion on the outer side and an inner cover member 193B which is a wall portion on the inner side.
As shown in FIG. 42, in the outer cover member 193A, the leading edge portion and the lower edge portion coincide with the leading edge portion and the lower edge portion of the second side plate 182A in a side view. The upper portion of the outer cover member 193A covers the notch portion 182C of the upper portion of the second side plate 182A. The trailing edge of the outer cover member 193A is located in front of the trailing edge of the second side plate 182A.

As shown in FIG. 40, the trailing edge portion of the outer cover member 193A is rotatably supported around the vertical axis by the support member 196 fixed to the rear support frame 147 via the hinge 197. As a result, the opening / closing bonnet 193 can be opened / closed. The space between the rear end portion of the outer cover member 193A and the right end portion of the third cover 18C is closed by the corner cover 198.
As shown in FIG. 42, the inner cover member 193B closes the inspection hole 182B. As shown in FIG. 40, a flange portion 193C is provided on the outer peripheral portion of the inner cover member 193B, and the flange portion 193C is provided with a seal member 193D that abuts around the inspection hole 182B. Further, the inner surface 193E (the surface on the ER side of the prime mover room) of the inner cover member 193B is recessed toward the outside of the machine body in order to avoid interference with the alternator 199, the fuel filter, and the like. Further, the inner surface 193E of the inner cover member 193B is formed gently (smoothly) and does not obstruct (rectify) the flow of the cooling air that cools the prime mover E1. The second side plate 182A and the inner cover member 193B are arranged close to the motor E1. As a result, the flow of the cooling air flowing on the right side of the prime mover E1 is improved, and the cooling efficiency can be improved.

As shown in FIGS. 34 and 43, the bonnet upper portion 183 has an upper cover 206 and a lower cover 207 provided below the upper cover 206. The upper cover 206 has a main cover 206A and a rear cover 206B provided behind the main cover 206A.
As shown in FIG. 43, in the front-rear direction K2, the main cover 206A is in front of the third portion 186C of the first lower cover mounting portion 186 and the third portion 195C of the second lower cover mounting portion 195 from above the front support frame. Covers up to. Further, the rear cover 206B covers from the rear end portion of the main cover 206A to the rear support frame 147.

As shown in FIG. 34, in the machine width direction K2, the upper cover 206 covers from the upper side of the first bonnet side portion 181 to the right end portion of the second bonnet side portion 182. Further, the left end side of the upper cover 206 protrudes from the first bonnet side portion 181 to the driver's seat 6 side (inside the aircraft). Further, the right end side of the upper cover 206 protrudes from the second side plate 182A to the side opposite to the driver's seat 6 (toward the inside of the aircraft).

As shown in FIGS. 34 and 43, the rear cover 206B is provided with an exhaust unit 200 for discharging cooling air. The exhaust unit 200 has an outer peripheral frame member 211 and a plurality of horizontal frame members 212A, 212B, 212C. The outer peripheral frame member 211 has a first side member 211A, a second side member 211B, a front member 211C, and a rear member 211D. The first side member 211A and the second side member 211B are provided at intervals in the machine width direction K2. The front member 211C and the rear member 211D are provided at intervals in the front-rear direction K2.

The plurality of horizontal frame members 212A, 212B, and 212C are provided inside the outer peripheral frame 211 with a space between the front member 211C and the rear member 211D in the front-rear direction K1. Therefore, between the front material 211C and the horizontal frame material 212A, between the horizontal frame material 212A and the horizontal frame material 212B, between the horizontal frame material 212B and the horizontal frame material 212C, and between the horizontal frame material 212C and the rear material 211D. The air can be circulated.

A cover for avoiding rain (avoid water) may be provided above the exhaust unit 200.
As shown in FIG. 43, in the front-rear direction K1, the lower cover 207 is the front support frame 14.
It is provided from 6 to the upper ends of the third portion 186C of the first lower cover mounting portion 186 and the third portion 194C of the second lower cover mounting portion 194. Further, the lower cover 207 is formed along the shapes of the first lower cover mounting portion 186 and the second lower cover mounting portion 194. The front end of the lower cover 207 is fixed to the upper end of the front support frame 146. The intermediate portion of the lower cover 207 is close to the upper portion of the motor E1 to improve the cooling efficiency. Further, the rear portion of the lower cover 207 is formed in a zigzag shape that extends upward and is bent back and forth.

As shown in FIGS. 34 and 41, the lower cover 207 is provided from the first lower cover mounting portion 186 to the second lower cover mounting portion 194 in the machine body width direction K2. The left end portion of the lower cover 207 in the machine width direction K2 is fixed to the first lower cover mounting portion 186, and the right end portion is fixed to the second lower cover mounting portion 194. Further, in the present embodiment, the lower cover 207 includes a first plate material 207A extending from the front support frame 146 to the rear ends of the second portions 186B and 194B, and a second plate material 207B extending from the lower end to the upper end of the third portions 184C and 194C. It is formed from and.

The lower cover 207 is formed in a flat shape (or a shape in which the surface shape smoothly changes along the flow direction of the cooling air) that does not obstruct the flow of the cooling air flowing in the upper part of the motor E1 (the upper part of the motor chamber ER). ing. That is, the lower cover 207 satisfactorily guides the cooling air and rectifies it. The lower cover 207 may be formed of one plate material or may be formed of three or more plate materials.

Since the upper portion 183 of the bonnet has a double structure of the upper cover 206 and the lower cover 207, it is possible to suppress the sound of the prime mover E1 from leaking to the outside of the bonnet 16.
As shown in FIG. 43, the lower cover 207 partitions the motor chamber ER and the main cover 206A, and the intake chamber 204 is formed between the lower cover 207 and the main cover 206A. That is, the intake chamber 204 is a chamber partitioned by the upper cover 207 and the lower cover 207.

As shown in FIG. 33, the left side surface of the intake chamber 204 is formed by the upper part of the first bonnet side portion 181. Further, as shown in FIG. 42, the right side surface of the intake chamber 204 is formed by the upper part of the outer cover member 193A of the opening / closing bonnet 193.
As shown in FIG. 43, the intake chamber 204 is provided with an air cleaner 201 that purifies the air sucked by the prime mover E1. The main cover 206A or the like is formed with an intake port for taking in outside air into the intake chamber 204. Further, the intake chamber 204 may be provided with a reserve tank or the like capable of storing the cooling water of the prime mover E1.

As shown in FIGS. 33 and 43, an exhaust gas purifying device 202 for purifying the exhaust gas (hereinafter referred to as exhaust gas) discharged from the prime mover E1 is provided at the rear portion of the prime mover E1. An exhaust port 203 for discharging the purified gas is provided in the upper part of the exhaust gas purifying device 202. The exhaust port portion 203 is provided below the exhaust portion 200. Further, the outlet of the exhaust gas in the exhaust port 203 faces upward, and the exhaust gas is discharged toward the exhaust gas 200. Therefore, the exhaust gas is discharged to the inside of the motor chamber ER, mixed with the cooling air, and discharged from the exhaust unit 200 to the outside of the bonnet 16. A silencer may be connected to the exhaust port 203 to exhaust the exhaust gas through the silencer.

As shown in FIG. 41, the bonnet rear portion 184 is formed of a plate material and is provided between the rear portions of the first bonnet side portion 181 and the second side plate 182A. Further, the bonnet rear portion 184 is provided over the first rear cover mounting portion 187 and the second rear cover mounting portion 195, the left end portion is fixed to the back surface of the first rear cover mounting portion 187, and the right end portion is the second. It is fixed to the back surface of the rear cover mounting portion 195.

As shown in FIGS. 35 and 38, the bonnet rear portion 184 is provided from the upper end to the lower end of the first bonnet side portion 181 and the second side plate 182A, and the lower end portion 184e is provided with the first bonnet side portion 181 and the second side plate 182A. It protrudes downward from the lower end of. Further, the bonnet rear portion 184 is formed along the shapes of the first rear cover mounting portion 187 and the second rear cover mounting portion 195 in the side view. Therefore, the upper portion of the rear portion 184 of the bonnet faces the rear portion of the lower cover 207, and the portion corresponding to the portion recessed toward the front of the lower cover 207 is formed so as to project forward.

In the present embodiment, the bonnet rear portion 184 is an intermediate portion corresponding to the upper plate 184A corresponding to the upper portion 187A of the first rear cover mounting portion 187 and the upper portion 195A of the second rear cover mounting portion 195, and the intermediate portion 187B and the intermediate portion 195B. It is formed by a plate 184B and a lower plate 184C corresponding to the lower 187C and the lower 195D. The bonnet rear portion 184 may be formed of one plate material, or may be formed of two or four or more plate materials.

As shown in FIG. 35, a first partition body (partition body) 208 is provided between the swivel substrate 9 and the first side bonnet 181. The first partition body 208 is arranged on one side of the oil pan 217 arranged at the bottom of the motor E1. The first partition body 208 constitutes the left lower end portion (bottom portion) of the motor chamber ER, and prevents the sound of the motor E1 from wrapping around from below the first side portion bonnet 181 to the driver's seat 6 side.

The first partition body 208 has a first front partition member (first partition member) 208A constituting a front portion and an intermediate portion, and a first rear partition member 208B constituting a rear portion. The first front partition member 208A is provided from the first front support column 146A to the lateral reinforcing plate 216.
As shown in FIG. 21, the lateral reinforcing plate 216 is a member that reinforces the swivel board 9, and is provided on the upper surface of the rear portion of the swivel board 9 so as to extend in the machine width direction K2. The first front partition member 208A is arranged on one side of K2 in the machine width direction of the oil pan 217. The surface of the first front partition member 208A on the oil pan 217 side is a guide surface 218L that guides the cooling air. The intermediate portion of the guide surface 218L in the front-rear direction K1 is provided close to the oil pan 217.

As shown in FIGS. 21 and 35, the first rear partition member 208B is provided from the lateral reinforcing plate 216 to the front of the first rear support column 147A. As shown in FIGS. 44 and 46, the first rear partition member 208B has an upper wall 219a, a lower wall 219b, and a side wall 219c. The side wall 219c connects the left ends of the upper wall 219a and the lower wall 219b. The lower wall 219b is fixed on the swivel substrate 9.

As shown in FIG. 38, a second partition body (partition body) 209 is provided between the swivel substrate 9 and the second side plate 182A. The second partition body 209 is arranged on the other side of the oil pan 217. The second partition body 209 constitutes the right lower end portion (bottom portion) of the motor chamber ER, and the sound of the motor E1 wraps around from below the second side bonnet 182 to the side opposite to the driver's seat 6 and leaks. To prevent.

The second partition body 209 has a second front partition member (second partition member) 209A constituting the front portion and the intermediate portion, and a second rear partition member 209B constituting the rear portion. The second front partition member 209A is provided from the second front support column 146B to the lateral reinforcing plate 216.
As shown in FIG. 21, the second front partition member 209A is arranged on the other side of the body width direction K2 of the oil pan 217. The surface of the second front partition member 209A on the oil pan 217 side is a guide surface 218R for guiding the cooling air. The intermediate portion of the guide surface 218R in the front-rear direction K1 is provided close to the oil pan 217.

The distance between the first front partition member 208A and the second front partition member 209A in the machine width direction K2 is wide in the front-rear portion and narrow in the middle portion. The oil pan 217 is located where this interval is narrowed. Since the oil pan 217 is located where the distance between the first front partition member 208A and the second front partition member 209 is narrowed, the cooling air flowing on both sides of the oil pan 217 in the machine width direction K2. Flows well, and the engine oil in the oil pan 21 can be cooled well.

As shown in FIG. 33, the distance between the oil pan 217 and the swivel substrate 9 is also narrow, and the cooling air flows well below the oil pan 217. No opening is formed below the prime mover E1 of the swivel board 9, and the cooling air flowing under the prime mover E1 (lower part of the prime mover chamber ER) flows behind the prime mover E1.
Further, since the opening is not formed below the prime mover E1 of the swivel board 9, even if the prime mover E1 is arranged on the right side of the machine body 2, the dust wound up by the second traveling device 3R is collected in the prime mover room ER. The oil pan 217 is not damaged by foreign matter on the second traveling device 3R (on the crawler).

As shown in FIGS. 21 and 38, the second rear partition member 209B is provided from the lateral reinforcing plate 216 to the front of the second rear support column 147B. As shown in FIGS. 44 and 46, the second rear partition member 209B has an upper wall 220a, a lower wall 220b, and a side wall 220c. The side wall 220c connects the upper wall 220a and the right end portion of the lower wall 220b to each other. The lower wall 220b is fixed on the swivel substrate 9.

As shown in FIG. 33, a pump housing 210 is attached to the lower part of the back surface of the prime mover E1, and a hydraulic pump P1 is attached to the pump housing 210 so as to project rearward. Therefore, the hydraulic pump P1 is attached to the downstream side in the flow direction of the cooling air in the prime mover E1.
As shown in FIGS. 44 and 45, a guide member 213 is provided below the hydraulic pump P1. The guide member 213 extends rearward from below the hydraulic pump P1 and guides the cooling air to the rear. The guide member 213 extends to the rear end side of the swivel board 9 (see FIG. 21). The front end portion of the guide member 213 penetrates the lateral reinforcing plate 216 in the front-rear direction K1.

The guide member 213 has an upper wall 213A, a first standing wall 213B, and a second standing wall 213C, and is formed in a hollow shape. The upper wall 213A is located below the hydraulic pump P1, and the front portion is located directly below the hydraulic pump P1. The first standing wall 213B extends downward from one end (left end) of the upper wall 213A in the machine width direction K2, and the lower end is fixed to the swivel board 9 (body 2). The second standing wall 213C extends downward from the other end (right end) of the upper wall 213A in the body width direction K2, and the lower end is fixed to the swivel board 9 (machine 2). The guide member 213 is open to the front and rear, and the lower part is closed by the swivel substrate 9. Therefore, the cooling air flowing backward from the lower part of the prime mover E1 passes through the guide member 213 and is guided to the rear part of the machine body 2 (swivel substrate 9). When the hydraulic pump P1 is attached to and detached from the prime mover E1, the hydraulic pump P1 can be moved while the hydraulic pump P1 is supported by the upper wall 213A of the guide member 213. This makes it possible to easily attach / detach the hydraulic pump P1.

When the hydraulic pump P1 is attached to the pump housing 210, the hydraulic pump P1 can be moved while being supported by the upper wall 213A and supported by the upper wall 213A. Similarly, when the hydraulic pump P1 is removed from the pump housing 210, the hydraulic pump P1 can be supported on the upper wall 213A. As a result, the hydraulic pump P1 can be easily attached and detached.

As shown in FIGS. 44 and 46, the first backing plate 221L is fixed to the left surface of the front portion of the first standing wall 213B. The first backing plate 221L is provided at a position facing the rear portion of the first rear partition member 208B. The second backing plate 221R is fixed to the right side of the front portion of the second standing wall 213C. The second backing plate 221R is provided at a position facing the rear portion of the second rear partition member 209B.

As shown in FIG. 44, the first partition plate 214L is provided on one side (left side) of the guide member 213 in the machine width direction K2, and the second partition plate 214R is provided on the other side (right side). The first partition plate 214L and the second partition plate 214R are arranged so that the plate surfaces face the front and back.
As shown in FIG. 46, the first partition plate 214L is fixed to the rear ends of the first rear partition member 208B and the first backing plate 221L. The second partition plate 214R is fixed to the rear ends of the second rear partition member 209B and the second backing plate 221R.

As shown in FIG. 37, the lower portion of the rear portion 184 of the bonnet is connected to the first partition plate 214L and the second partition plate 214R. Specifically, the left portion 184e1 of the lower end portion 184e of the bonnet rear portion 184 is fixed to the upper portion of the back surface of the first partition plate 214L, and the lower end portion 184e of the bonnet rear portion 184 is fixed to the upper portion of the back surface of the second partition plate 214R. The right part 184e2 of is fixed.

The rear portion of the prime mover chamber ER is partitioned by a wall body composed of a rear support frame 147, a bonnet rear portion 184, a first partition plate 214L, and a second partition plate 214R. A fourth cover body 18 is provided behind the wall body. The fourth cover body 18 is a rear cover body that covers the hydraulic oil tank T2, the fuel tank T1, and the like, which are members provided behind the rear portion 184 of the bonnet.

The wall body including the rear portion 184 of the bonnet and the fourth cover body 18 have a double-structured sound insulation structure behind the prime mover E1, and it is possible to suppress the sound of the prime mover E1 from being transmitted to the outside from the prime mover room ER.
As described above, the cooling efficiency is improved by forming a sound insulation structure with a double structure around the prime mover room ER and making the inner wall of the double structure flat or a shape in which the surface shape changes smoothly along the flow direction of the cooling air. It can be increased to improve the heat balance. In addition, the sound absorbing material can be abolished or minimized. In addition, noise reduction can be expected due to a decrease in the rotation speed of the cooling fan F1.

As shown by an arrow in FIG. 43, the cooling air generated by the cooling fan F1 and flowing in the upper part of the prime mover room ER flows below the lower cover 207 and reaches the rear part of the lower cover 207. The cooling air flowing to the rear part of the lower cover 207 rises between the rear part of the lower cover 207 (second plate material 207B) and the upper part of the bonnet rear part 184 (upper plate 184A), and rises from the exhaust part 200 to the outside of the bonnet 15. Is discharged to.

That is, a first cooling route (first cooling passage) 226 is formed in the upper part of the motor chamber ER so that the cooling air flowing between the prime mover E1 and the bonnet upper part 183 passes through the bonnet upper part 183 and is discharged to the outside. There is. The first cooling route 226 has an exhaust passage 228 formed by the rear portion of the lower cover 207 and the upper portion of the bonnet rear portion 184 to guide the cooling air to the exhaust portion 200. The exhaust passage 228 is a first exhaust portion that discharges the cooling air flowing between the prime mover E1 and the ceiling portion of the prime mover chamber ER to the outside of the prime mover chamber ER. The exhaust gas of the prime mover E1 is discharged to the exhaust passage 228 through the discharge port 203, and the cooling air and the exhaust gas are discharged to the outside of the prime mover room ER through the first discharge portion.

In the present embodiment, the first cooling route 226 includes an upper portion of the first bonnet side portion 181, an upper portion of the second bonnet side portion 182, a lower cover 207, an upper portion of the bonnet rear portion 184, and an exhaust portion 200. There is.
As shown by an arrow in FIG. 33, the cooling air generated by the cooling fan F1 and flowing through the lower part of the prime mover room ER passes between the prime mover E1 and the swivel board 9 and on both sides of the prime mover E1. It flows backward. As shown by an arrow in FIG. 45, the cooling air flowing behind the prime mover E1 passes through the guide member 213 and flows behind the prime mover E1. The guide member 213 is a second discharge portion that discharges the cooling air flowing between the prime mover E1 and the bottom of the prime mover chamber ER to the outside of the prime mover chamber ER.

That is, a second cooling route 227 is formed in the lower part of the motor chamber ER to flow the cooling air flowing between the motor E1 and the swivel substrate 9 to the rear of the motor E1.
The second cooling route 227 includes a lower portion of the first bonnet side portion 181 and a lower portion of the second bonnet side portion 182, a swivel substrate 9, a first partition body 208, a second partition body 209, a guide member 213, and the like. Has been done.

As shown in FIG. 45, the hydraulic pump P1 is covered by a pump partition 222 and is isolated (partitioned) from the prime mover room ER. Therefore, the prime mover room ER and the hydraulic equipment arrangement unit 13 (second arrangement unit 13B) are partitioned by the pump partition 222, and the hydraulic pump P1 is located in the hydraulic equipment arrangement unit 13. The pump partition 222, together with the bonnet rear portion 184 and the lateral reinforcing plate 216, constitutes a downstream side wall portion which is a wall portion on the downstream side in the flow direction of the cooling air flowing on the prime mover E1 in the prime mover chamber ER. The first discharge portion is provided on the ceiling portion of the motor chamber ER, the downstream side wall portion, or between the bottom portion of the motor chamber ER and the downstream side wall portion. Further, the second discharge portion is provided at the bottom of the motor chamber ER, the downstream side wall portion, or between the bottom portion of the motor chamber ER and the downstream side wall portion. Further, the guide member 213 constituting the second discharge portion penetrates the position corresponding to the region between the first partition body 208 and the second partition body 209 in the downstream side wall portion and passes below the hydraulic pump P1. Have been placed.

Further, the pump partition 222 has a cylindrical shape surrounding the hydraulic pump P1 and has a prime mover E1 (a prime mover E1 ().
It is provided between the pump housing 210) and the rear part of the bonnet 184. The pump partition 222 is formed of an elastic member. Further, the pump partition 222 has a peripheral wall 222A surrounding the hydraulic pump P1. A flange portion 222B extending inward in diameter is provided at the front end portion of the peripheral wall 222A, and a mounting plate 224 is provided inside the flange portion 222B. The mounting plate 224 is fixed to the back surface 210a of the pump housing 210 by bolts or the like. The front portion of the peripheral wall 222A is fitted and mounted on the outer peripheral portion of the mounting plate 224. The rear portion of the peripheral wall 222A is fitted and attached to the edge portion of the insertion hole 223 formed in the rear portion 181 of the bonnet. Therefore, the pump partition 222 protrudes from the insertion hole 223 toward the prime mover chamber ER side.

A bellows portion 222C that can be expanded and contracted in the front-rear direction K1 is provided on the front portion of the peripheral wall 222A, and the pump partition 222 easily changes its shape (extends and contracts) in the front-rear direction K1.
The pump partition 222 is open to the rear, and the rear portion of the hydraulic pump P1 projects rearward (second arrangement portion 13B of the hydraulic equipment arrangement portion 13) from the pump partition 222.
The pump partition 222 can protect the hydraulic pump P1 from dust and improve serviceability.

Next, the structure of the hydraulic oil tank T2 will be described with reference to FIGS. 47 and 48.
The hydraulic oil tank T2 has a tank body 28 for storing hydraulic oil. The tank body 28 is a plurality of vertical walls (first vertical wall 28C to seventh vertical wall 28I) connecting the upper wall 28A, the lower wall 28B located below the upper wall 28A, and the upper wall 28A and the lower wall 28B. ) And. The tank body 28 has a prismatic shape and has a plurality of corner portions. In the present embodiment, the hydraulic oil tank T2 is formed in a vertically long rectangular parallelepiped shape (square columnar shape).

The upper wall 28A has an opening 33 formed through the upper wall 28B. A mounting seat 34 is provided around the opening 33 on the upper surface of the upper wall 28B. A tank cover that closes the opening 33 is attached to the mounting seat 34.
A drain pipe 35 is attached to the lower wall 28B. The drain pipe 35 is closed by a plug member so that it can be opened and closed. A mounting plate 36 to be mounted on a mounting base fixed on the swivel board 9 is fixed to the lower surface of the lower wall 28B.

The first vertical wall 28C to the seventh vertical wall 28I are wall portions extending in the vertical direction. The first vertical wall 28C is a wall portion on the front side. The second vertical wall 28D is a wall portion on the back side and faces the first vertical wall 28C.
The third vertical wall 28E is a right wall portion, and is formed along the direction from the first vertical wall 28C to the second vertical wall 28D. The fourth vertical wall 28F is a left wall portion and faces the third vertical wall 28E. The fifth vertical wall 28G is a wall portion connecting the first vertical wall 28C and the third vertical wall 28E, and constitutes a first corner portion (corner portion on the front right) which is one corner of the four corners of the tank body 28. There is. The fifth vertical wall 28G is inclined with respect to the first vertical wall 28C and the third vertical wall 28E.

The sixth vertical wall 28H is a wall portion connecting the second vertical wall 28D and the third vertical wall 28E, and has a second corner portion (corner portion at the rear right) which is another corner of the four corners of the tank body 28. It is composed. The sixth vertical wall 28H is inclined with respect to the second vertical wall 28D and the third vertical wall 28E. The 7th vertical wall 28I is a wall portion connecting the 2nd vertical wall 28D and the 4th vertical wall 28F, and is a third corner portion (the corner portion at the rear left) which is another corner of the four corners of the tank body 28. Consists of. The seventh vertical wall 28I is inclined with respect to the second vertical wall 28D and the fourth vertical wall 28F.

The fourth corner portion (corner portion on the front left) 28J, which is a corner portion between the first vertical wall 28C and the fourth vertical wall 28F, is formed at a right angle.
The hydraulic oil tank T2 has a partition wall 31 that partitions the inside of the tank body 28 into an upper chamber 28K on the upper side and a lower chamber 28L on the lower side. The partition wall 31 is provided at a substantially central portion in the vertical direction of the tank body 28. Further, the partition wall 31 has an insertion hole 32 formed in the central portion thereof so as to vertically penetrate the partition wall 31.

A cylindrical passage forming member 37 having an axial center in the vertical direction is inserted into the insertion hole 32. A ring-shaped mounting plate 39 is fixed to the upper part of the passage forming member 37. The mounting plate 39 is fixed to the upper surface of the partition wall 31 and closes the gap between the passage forming member 37 and the insertion hole 32. The inner peripheral surface of the passage forming member 37 is a main passage 38 that communicates the upper chamber 28K and the lower chamber 28L.

The partition wall 31 is formed in a substantially rectangular shape in a plan view, and has first square edge portions 31a to fourth square edge portions 31d formed by cutting diagonally at four corners. The first corner edge portion (edge portion) 31a corresponds to the first corner portion (fifth vertical wall 28G), and the second corner edge portion (edge portion) 31b corresponds to the second corner portion (sixth vertical wall 28G). The third corner edge portion (edge portion) 31c corresponds to the third corner portion (7th vertical wall 28I), and the fourth corner edge portion (edge portion) 31d corresponds to the fourth corner portion 28J. is doing.

A first passage 40A is formed between the first corner edge portion 31a and the first corner portion, a second passage 40B is formed between the second corner edge portion 31b and the second corner portion, and a third passage 40B is formed. A third passage 40C is formed between the corner edge portion 31c and the third corner portion, and a fourth passage 40D is formed between the fourth corner edge portion 31d and the fourth corner portion 28J. The first passage 40A to the fourth passage 40D are gaps (gap passages) formed by the edge of the partition wall 31 and the inner surface of the tank main body 28, and communicate with the upper chamber and the lower chamber.

A return pipe 29 and a suction pipe 30 are attached to the first vertical wall 28C. The return pipe 29 is a pipe used for hydraulic equipment to allow the return hydraulic oil that returns to the hydraulic oil tank T1 (tank main body 28) to flow into the tank main body 28. The suction pipe 30 is connected to the hydraulic pump P1 via a hydraulic hose, a joint, or the like, and the hydraulic oil of the lower chamber 28L sucked by the hydraulic pump P1 is discharged to the outside of the tank.

The return pipe 29 is offset in the horizontal direction along the wall surface of the first vertical wall 28C with respect to the main passage 38. Specifically, the return pipe 29 is offset from the main passage 38 to the third vertical wall 28E and at a position away from the main passage 38. That is, the return pipe 29 is oriented so that the flow direction of the hydraulic oil flowing from the return pipe 29 into the upper chamber 28K (the pipe axis direction at the outlet 29a of the return pipe 29) is different from the direction toward the main passage 38. Is located in.

The return pipe 29 has an inflow port 29a into which the return hydraulic oil enters and an outflow port 29b in which the hydraulic oil flows into the upper chamber 28K. The pipe portion 29d on the inflow port 29a side of the return pipe 29 faces upward. The pipe portion 29c on the outlet 29b side of the return pipe 29 is provided in the horizontal direction. Further, the pipe portion 29c is provided in a direction substantially orthogonal to the first vertical wall 28C. Further, the pipe portion 29c penetrates the first vertical wall 28c on the slightly upper side (near) of the partition wall 31 and is fixed to the first vertical wall 28c.

The outlet 29b (return pipe 29) is arranged so that the flow direction of the hydraulic oil faces the second vertical wall 28D and deviates from the main passage 38 toward the third vertical wall 28E. Further, the outlet 29b (return pipe 29) may be configured so that the flow direction of the hydraulic oil faces a direction inclined by a predetermined angle in the horizontal direction with respect to the direction Y4 toward the main passage 38.
Further, the outlet 29b may be oriented in a direction parallel to the horizontal line Y3 passing through the center X3 of the main passage 38 and may return to a position away from the main passage 38 to allow the hydraulic oil to flow out. In the illustrated example, the line Y3 shows a line orthogonal to the first vertical wall 28C (a line parallel to the third vertical wall 28E), but the line Y3 is not limited to this.

Further, the outlet 29b is arranged closer to the partition wall 31 than the central portion in the vertical direction of the upper chamber 28K. This prevents the outlet 29b from being exposed above the oil level when the oil level of the hydraulic oil drops.
The suction pipe 30 is provided closer to the partition wall 31 than the center of the lower wall 28B and the partition wall 31 in the vertical direction. Further, the suction pipe 30 is provided in the machine body width direction K2 closer to the fourth vertical wall 28F than the center of the machine body width direction K2 of the tank main body 28. The suction port 30a side of the suction pipe 30 partially overlaps with the main passage 38 in a plan view. The suction port 30a faces the second vertical wall 28D.

The return hydraulic oil flowing from the outflow port 29b into the upper chamber 28K causes a flow of the hydraulic oil flowing around the main passage 38 (flow along the wall surface of the vertical wall of the tank body 28), and the return hydraulic oil flows. It mixes well with the hydraulic oil in the upper chamber 28K.
The hydraulic oil in the upper chamber 28K is sucked by the hydraulic pump P1 in the lower chamber 28L, so that the main passage 38 in the center of the tank body 28 and the gap passages at the four corners (first passage 40A to fourth passage 40D). ) And flows into the lower chamber 28L and mixes well with the hydraulic oil in the lower chamber 28L.

The flow of hydraulic oil flowing around the main passage 38 and the flow of hydraulic oil flowing from the main passage 38 and the gap passages at the four corners to the lower chamber 28L allow the hydraulic oil to mix well and suppress temperature unevenness of the hydraulic oil. be able to. Further, the partition wall 31 reinforces the tank body 28.
Further, since the first corner portion 28G, the second corner portion 28H, and the third corner portion 28I are inclined (chatomed), the hydraulic oil flows along the wall surface of the vertical wall of the tank body 28. Cheap. Further, it is possible to suppress the formation of stagnation at the corners of the tank body 28.

Further, when the hydraulic pump P1 stops suction, air bubbles mixed in the hydraulic oil in the lower chamber 28L satisfactorily escape to the upper chamber 28K via the main passage 38 and the first passage 40A to the fourth passage 40D. .. Further, even if the hydraulic oil tank T2 is tilted, air bubbles mixed in the hydraulic oil in the lower chamber 28L escape from any of the gap passages at the four corners of the tank body 28.
The working machine 1 of the present embodiment has the following effects.

The work machine 1 is mounted on one side of the machine 2 and the width direction K2 of the machine 2, the driver 42 having the driver's seat 6 and the control device 41, and the other side of the width direction K2 of the machine 2. It includes a mounted prime mover E1 and a hydraulic device arranging section 13 provided between the driving section 42 and the prime mover E1 on which hydraulic devices are arranged.
According to this configuration, the operating unit 42 does not interfere with accessing the hydraulic equipment arranged in the hydraulic equipment arrangement unit 13. That is, the hydraulic equipment can be easily accessed.

Further, the machine body 2 can turn around the turning axis X1 extending in the vertical direction, and the driving unit 42 passes through the turning axis X1 and extends in the front-rear direction K1 from the center line Y1 in the body width direction K2. The prime mover E1 may be arranged closer to the side portion, and the prime mover E1 may be arranged closer to the other side portion of the aircraft width direction K2 than the center line Y1.
According to this configuration, the balance of K2 in the width direction of the machine body 2 can be improved.

Further, the hydraulic equipment arranged in the hydraulic equipment arrangement unit 13 includes a swivel joint S1 for circulating hydraulic oil, a swivel motor M3 for swiveling the machine body 2, and a control valve V1 for controlling a plurality of hydraulic actuators. May be good.
According to this configuration, it is possible to access the swivel joint S1, the swivel motor M3, and the control valve V1 without lowering the driving unit 42.

Further, the machine body 2 can swivel around the swivel axis X1 extending in the vertical direction, the swivel joint S1 is arranged at the swivel axis X1 position, and the swivel motor M3 is arranged in front of the swivel joint S1 to control. The valve V1 may be arranged behind the swivel joint S1.
According to this configuration, the swivel joint S1, the swivel motor M3, and the control valve V1 can be compactly housed in the hydraulic equipment arrangement in the machine width direction K2, and the increase in size of the machine body 2 in the width direction K2 can be suppressed.

Further, in the hydraulic equipment arranged in the hydraulic equipment arrangement unit 13, at least a part of the hydraulic equipment may be arranged on the other side portion side (in the machine width direction K2) with respect to the operation unit 42. According to this configuration, the hydraulic equipment can be accessed without lowering the driving unit 42.
Further, the control device U1 may be provided in the hydraulic equipment arrangement unit 13.
According to this configuration, the control device U1 can be accessed without lowering the operation unit 42. That is, the control device U1 can be easily accessed.

Further, the fuel tank T1 for storing the fuel of the prime mover E1 and the hydraulic oil tank T2 for storing the hydraulic oil for operating the hydraulic actuator are provided, and the fuel tank T1 and the hydraulic oil tank T2 are from the operation unit 42 in the machine body 2. It may be mounted side by side in the aircraft width direction K2 at the rear.
According to this configuration, by arranging the fuel tank T1 and the hydraulic oil tank T2 behind the operating unit 42, the weight balance of the working machine 1 can be improved. Further, the fuel tank T1 and the hydraulic oil tank T2 can be formed in a shape (vertical shape) having a high height and a small horizontal cross-sectional area, and can be compactly arranged in the airframe 2 in the width direction K2. can.

Further, the support bracket 20 provided on the machine body 2 in a forward projecting manner, the support bracket 20 is provided with a swing bracket 21 supported so as to be swingable, and a swing cylinder C2 for swinging the swing bracket 21. One end of the cylinder C2 may be attached to the swing bracket 21, and the other end of the cylinder C2 may be attached to the machine body 2 below the operating unit 42.

According to this configuration, the swing cylinder C2 can be compactly arranged below the driving unit 42.
Further, a radiator R1 arranged in front of the prime mover E1, a cooling fan F1 arranged between the radiator R1 and the prime mover E1 to generate cooling air flowing backward, and a cover body (first cover) covering the radiator R1. The body 15) may be provided with a cover body having an outside air intake port 19 for taking in outside air into the cover body on the side surface of the front portion.

According to this configuration, it is possible to prevent an obstacle such as a branch of a tree from sticking into the outside air intake port 19 when the working machine 1 is being advanced.
The work machine 1 includes a machine body 2 capable of turning around a turning axis X1 extending in the vertical direction, a driver's seat 6 mounted on one side of the machine body 2, and a prime mover E1 arranged on the other side of the machine body 2. A fuel tank T1 mounted on the airframe 2 behind the driver's seat 6 is provided, and the fuel tank T1 has a width along the airframe width direction K2 and a height direction other than the width along the airframe front-rear direction K1. The width is wider.

According to this configuration, by providing the fuel tank T1 behind the driver's seat 6, restrictions in the height direction are eliminated, and a fuel tank having a high height and a small horizontal cross-sectional area (longitudinal shape) is eliminated. T1 can be formed. As a result, the fuel in the fuel tank T1 can be effectively used even when the airframe 2 is tilted.
Further, the fuel tank T1 may have a shape in which the width in the height direction is wider than the sum of the width along the machine body width direction K2 and the width along the machine body front-rear direction K1.

According to this configuration, the fuel tank T1 can be increased in height to reduce the cross-sectional area in the horizontal direction, so that the fuel in the fuel tank T1 can be used more effectively.
Further, the weight 10 arranged behind the fuel tank T1 may be provided, and the fuel tank T1 may be arranged so as to face the weight 10.
According to this configuration, the vertically long fuel tank T1 can be effectively protected by the weight 10.

Further, substantially the entire rear end surface of the fuel tank T1 may face the weight 10. According to this configuration, the fuel tank T1 can be more effectively protected by the weight 10.
Further, the hydraulic oil tank T2 for storing the hydraulic oil for driving the hydraulic actuator may be provided on the side of the fuel tank T1 and at a position facing the weight 10. According to this configuration, the fuel tank T1 and the hydraulic oil tank T2 can be effectively protected by the weight 10.

Further, the airframe 2 may have a step 49 provided on the side of the fuel tank T1.
According to this configuration, even if the fuel tank T1 is formed in a vertically long shape, fuel can be easily refueled to the fuel tank T1 by riding on the step 49 next to the fuel tank T1. In addition, work such as maintenance can be facilitated.

Further, a fuel refueling device 57 may be provided below the step 49 to refuel the fuel tank T1.
According to this configuration, the fuel refueling device 57 can be easily accessed, and the vertically elongated fuel tank T1 can be easily refueled.
The work machine 1 includes a machine body 2, a driving unit 42 having a driver's seat 6 and a control device 41 mounted on the machine body 2, a rear mounting member arranged behind the driving unit 42, and side surfaces of the rear mounting member. The floor surface (step 49) provided behind the driving unit 42 and on the side of the rear mounting member is provided, and the space above the floor surface (space 46) is open to the outside of the machine body.

According to this configuration, a space 46 open to the outside of the machine body can be formed behind the driving unit 42, and this space 46 can be effectively used. For example, you can get on step 49 to perform cleaning work, maintenance work, refueling work, and the like.
Further, the driving unit 42 is arranged in the cabin 5, the cabin 5 has a rear window 52, and the rear window 52 is provided at a position where the cabin 5 and the space (space 46) communicate with each other. It is also good.

According to this configuration, the ventilation and ventilation of the cabin 5 can be improved. Further, the visibility when looking at the outside of the cabin 5 through the rear window 52 is improved.

Further, the rear mounting member has a weight 10 mounted on the rear portion of the machine body 2 and a cover member (first cover 18A) provided between the weight 10 and the driving unit 42, and the space (space 46). ), The first forming surface 47, which is one side of the body width direction K2, may be defined by the side surface of the weight 10 and the side surface of the cover member.

According to this configuration, the space 46 behind the driving unit 42 can be easily formed.
Further, the first forming surface 47 may be located closer to the center portion of the machine body 2 in the width direction K2 than the center portion of the machine body width direction K2 of the operating unit 42.
According to this configuration, the width of the space 46 can be widened.
Further, the driving unit 42 is provided with a door 53 on the side surface on the outer side of the machine body, and at least a part of the door 53 may be accommodated in the space when the door 53 is opened.

According to this configuration, when the door 53 is opened, it can be accommodated in the turning track of the airframe 2, so that the risk that the door 53 comes into contact with an object around the airframe and is damaged can be reduced.
The work machine 1 has a machine body 2 capable of turning around a turning axis X1 extending in the vertical direction, a driving unit 52 mounted on the machine body 2 having a driver's seat 6 and a control device 41, and a forward protrusion to the machine body 2. The support bracket 20 provided in a shape, the swing bracket 21 rotatably supported in the horizontal direction around the swing shaft 26 by the support bracket 20, and the swing bracket 21 swingably supported in the vertical direction. A boom 22 is provided, and the driving unit 42 is arranged on one side of the machine body width direction K2 from the center line Y1 extending in the front-rear direction and passing through the turning axis X1, and the swing shaft 26 is located on one side of the operating unit 42. It is located on the other side of the aircraft width direction K2.

According to this configuration, the cabin 5 is provided on one side of the machine body width direction K2 with respect to the center line Y1 that passes through the turning axis X1 and extends in the front-rear direction, and the swing shaft 26 is more than the driving unit 42. It is located on the other side of the aircraft width direction K2. That is, the center line Y1 is located on the side of the driving unit 42 and on the side where the boom 22 is arranged. As a result, the boom 22 can be arranged close to the center line Y1, and the weight balance of the work machine 1 in the body width direction K2 can be improved.

Further, the center line Y1 may be located between the line Y2 in the front-rear direction passing through the axis X2 of the swing shaft 26 and the side surface on the other side of the driving unit 42.
According to this configuration, the support bracket 20, the swing bracket 21, and the boom 22 can be arranged near the center line Y1, and the weight balance of the work machine 1 in the machine width direction K2 can be improved.

Further, the swing bracket 21 may be arranged at a position where a part of the swing bracket 21 overlaps with the center line Y1 when the boom 22 is facing the front side of the machine body.
Also with this configuration, the support bracket 20, the swing bracket 21, and the boom 22 can be arranged near the center line Y1, and the weight balance in the body width direction K2 of the working machine can be improved.

Further, the motor E1 is provided on the other side of the machine width direction K2 with respect to the center line Y1 in the machine 2, and the line Y2 in the front-rear direction K1 passing through the axis X2 of the swing shaft 26 is the motor E1 and the driving unit 42. It may be configured to pass between and.
According to the above configuration, the cabin 5 is arranged on one side of the airframe 2, the prime mover E1 is arranged on the other side of the airframe 2, and the swing bracket 21 and the boom 22 are arranged in front between the cabin 5 and the prime mover E1. Since the base portion 22A of the machine 2 is located, the weight balance of the machine body 2 in the width direction K2 can be improved.

Further, it is provided with a detection device 45 for detecting the position of the boom 22 and the rotation angle of the swing bracket 21 with respect to the support bracket 20, and a control device U1 for acquiring the detection signal of the detection device 45 and controlling the boom 22. The control device U1 may stop the boom 22 before the boom 22 interferes with the driving unit 42.
According to this configuration, it is possible to prevent the boom 22 from interfering with the driving unit 42.

The work machine 1 includes a driver's seat 6, a control table 81 arranged in front of the driver's seat 6, a control member 82 provided on the control table 81 and operated by gripping, and a driver's seat 6 from the control table 81. It is provided with an elbow rest member 83 extending to the side.
According to this configuration, when the driver grips and operates the control member 82, the driver can operate the control member 82 by attaching an elbow to the elbow rest member 83. This makes it possible to reduce driver fatigue due to long-term operation.

Further, by providing the control member 82 and the elbow rest member 83 on the control table 81 provided in front of the driver's seat 6, the driver operates the control member 82 in a forward leaning posture while sitting on the driver's seat 6. Will be done. As a result, for example, in the work machine 1 in which the driver's seat 6 is provided in the cabin 5, the driver's face approaches the windshield, so that the visibility is improved. Further, since the elbow rest member 83 is not on the side of the driver's seat 6, the elbow rest member 83 does not limit the degree of freedom of the body width.

Further, the control base 81 has a base 86 and a mounting base 93 supported on the base 86 so as to be vertically adjustable, and the control member 82 and the elbow rest member 83 are provided on the mounting base 93. May be good.
According to this configuration, the heights of the control member 82 and the elbow rest member 83 can be adjusted according to the height of the driver.
Further, the control member 82 includes a first control handle 82L and a second control handle 82R located on the side of the first control handle 82L, and the armrest member 83 includes the first control handle 82L from the rear side to the rear. The first armrest 83L extending to the rear and the second armrest 83R extending rearward from the rear side of the second steering handle 82R are included, so that the distance between the first armrest 83L and the second armrest 83R increases toward the rear. The facing surfaces may be provided in an inclined shape.

According to this configuration, the driver can operate the second steering wheel 82R and the second steering wheel 82R in a comfortable posture (with elbows stretched) by moving the elbow away from the fuselage. Further, the distance between the first armrest 83L and the second armrest 83R in the machine width direction K2 can be widened.
Further, the traveling device 3 includes a floor portion 5B that supports the driver's seat 6, and a traveling operation member 85 that is provided on the floor portion 5B and operates the traveling device 3 by a stepping operation. The first traveling pedal 85L located below the 1 armrest 83L and the second traveling pedal 85R located below the second armrest 83R may be included.

According to this configuration, the driver holds the first steering wheel 82L and the second steering wheel 82R with his elbows on the front side of the driver's seat 6, and one side to the first traveling pedal 85L below the first armrest 83L. The leg is placed and the other foot is placed on the second traveling pedal 85R below the second armrest 83R. That is, the driver is in a posture in which the knees are bent, and the driver with a higher extension is in a posture in which the upper body moves upward. As a result, the adjustment range of the front-rear position of the driver's seat 6 can be reduced. That is, the device for adjusting the front-rear position of the driver's seat 6 can be made compact. Further, for example, in the work machine 1 in which the driver's seat 6 is provided in the cabin 5, the dimensions of the cabin 5 in the front-rear direction K1 can be made compact.

Further, the control base 81 has a base 86 and a mounting base 93 provided on the upper portion of the base 86, and the mounting base 93 is mainly equipped with the first control handle 82L and the second control handle 82R. A part 93A, a first extending part 93L extending rearward from one side of the main part 93A in the body width direction and having a first armrest 83L attached, and a rear part of the main part 93A from the other side part in the body width direction. It may have a second extension 93R to which a second armrest 83R is attached while extending.

According to this configuration, the first armrest 83L and the second armrest 83R can be easily supported, and the support strength of the first armrest 83L and the second armrest 83R can be secured.
Further, the driver's seat 6 has a seat portion 6A and a backrest portion 6B, and the seat portion 6A and the first extending portion 93L partially overlap in the vertical direction, and the seat portion 6A and the second extending portion are partially overlapped. The 93R may partially overlap in the vertical direction.

According to this configuration, the driver's seat 6 approaches the cockpit 81, and the driver's seat 42 including the driver's seat 6 and the cockpit 81 can be compactly configured.
Further, the elbow rest member 83 may have a front portion pivotally supported on the control table 81 so that the rear portion can swing upward.
According to this configuration, it is possible to facilitate the driver's getting on and off.

Further, the slide rail 78 for adjusting the front-rear position of the driver's seat 6 may be provided with the slide rail 78 whose position can be adjusted in the inclined direction in which the driver's seat 6 shifts upward as it goes backward.
According to this configuration, by adjusting the front-rear position of the driver's seat 6, the vertical position of the driver's seat 6 can be adjusted at the same time. Further, by simultaneously adjusting the front-rear position and the up-down position of the driver's seat 6, the driver's seat 6 can be adjusted according to the height of the driver within a small movement range in the front-rear direction. The device for adjusting the front-rear position of 6 can be made compact. Further, for example, in a working machine in which the driver's seat 6 is provided in the cabin 5, the dimensions of the cabin 5 in the front-rear direction K1 can be made compact.

Further, an operation lever (dozer lever 80) capable of swinging operation and a lever regulating mechanism 133 for regulating swinging of the operating lever are provided, and the control base 81 is provided on the base 86 and the upper part of the base 86. The lever regulation mechanism 133 has an interlocking member (rod member 135) that moves following the swing of the operating lever, and the interlocking member is urged to urge the operating lever. It has a neutral spring 141 that returns from the swing position to the neutral position, the interlocking member is arranged along the lower surface side of the mounting base 93 and moves in a predetermined range in the direction along the lower surface, and the neutral spring 141 is the interlocking member. It may be provided along the line.

According to this configuration, the vertical width of the lever regulating mechanism 133 can be reduced. As a result, the space below the mounting base 93 can be widened, and for example, when a pedal is provided below the operating lever, a space for arranging the driver's legs can be secured.
The work machine 1 includes a floor portion 5B, a driver's seat 6 arranged on the floor portion 5B, and a footrest portion 79 provided on the floor portion 5B on the side of the driver's seat 6 on which the driver puts his / her foot. , Is equipped.

According to this configuration, the driver can rest by bending his legs with his feet positioned behind his knees.
Further, a traveling device 3 and a traveling operation member 85 provided in front of the footrest portion 79 and operating the traveling device 3 by stepping operation may be provided.
According to this configuration, the foot can be easily moved between the footrest portion 79 and the traveling operation member 85.

Further, the footrest portion 79 includes a first portion 79L located on one side of the driver's seat 6 and a second portion 79R located on the other side of the driver's seat 6, and the traveling operation member 85 is a first portion. A first traveling pedal 85L located in front of the portion 79L and a second traveling pedal 85R located in front of the second portion 79R may be included.
According to this configuration, the movement of the foot between the first portion 79L and the first traveling pedal 85L and the movement of the foot between the second portion 79R and the second traveling pedal 85R are easy.

Further, while the driver is sitting in the driver's seat 6, one foot can be moved from the first traveling pedal 85L to the first portion 79L on the floor portion 5B, and the second traveling pedal 85R to the second portion. The other foot can be moved to 79R on the floor 5B.
According to this configuration, the movement of the foot between the first traveling pedal 85L and the first portion 79L and the movement of the foot between the second traveling pedal 85R and the second portion 79R can be easily performed.

Further, the driver's cab 81 is provided with a driver's cab 81 arranged in front of the driver's seat 6 and a control member 82 provided on the driver's cab 81 to be gripped and operated, and the driver's cab 81 is erected on the floor portion 5B. It has a base 86 and a mounting base 93 mounted on the upper part of the base 86, and the control member 82 is mounted with a first control handle 82L provided on one side of the mounting base 93 in the body width direction K2. The traveling operation member 85 includes the second control handle 82R provided on the other side of the machine width direction K2 of the pedestal 93, and the traveling operation member 85 is the first traveling provided below one side portion of the body width direction K2 of the mounting base 93. The pedal 85L and the second traveling pedal 85R provided below the other side portion of the body width direction K2 of the mounting base 93 may be included.

According to this configuration, the first traveling pedal 85L and the second traveling pedal 85R located on the cockpit 81 side in front of the driver's seat 6 put their feet on the footrest portion 79 on the floor portion 5B on the side of the driver's seat 6. By moving the driver, the driver can rest his / her legs by bending his / her knees so that his / her feet are positioned behind the knees on the side of the driver's seat 6.
Further, the slide rail 78 for adjusting the front-rear position of the driver's seat 6 may be provided with the slide rail 78 whose position can be adjusted in the inclined direction in which the driver's seat 6 shifts upward as it goes backward.

According to this configuration, by moving the driver's seat 6 along the slide rail 78, the front-rear position and the vertical position of the driver's seat 6 can be adjusted at the same time. Further, the device for adjusting the front-rear position and the up-down position of the driver's seat 6 can be made compact. Further, for example, in the working machine 1 in which the driver's seat 6 is provided in the cabin 5, the dimensions of the cabin 5 in the front-rear direction K1 can be made compact.

The working machine 1 includes a driver's seat 6, a traveling device 3, and a traveling operation member 85 for operating the traveling device 3 by stepping on the driver's seat 6. The traveling operation member 85 is a side portion of the driver's seat 6 in the width direction of the machine body. The first traveling pedal 85L arranged in front of the driver's seat 6 and the second traveling pedal 85R arranged in front of the other side portion of the driver's seat 6 in the body width direction K2 are included.
According to this configuration, the driver can operate the first traveling pedal 85L and the second traveling pedal 85R with the distance between the left and right legs widened. Thereby, the operability of the first traveling pedal 85L and the second traveling pedal 85R can be improved.

Further, the distance between the first traveling pedal 85L and the second traveling pedal 85R may gradually increase toward the front.
According to this configuration, the driver can operate the pedal in a comfortable posture, and the operability of the first traveling pedal 85L and the second traveling pedal 85R can be improved.
Further, the first traveling pedal 85L and the second traveling pedal 85R may be inclined so as to move downward as they go forward.

According to this configuration, for example, when the driver's seat 6 is operated close to the first traveling pedal 85L and the second traveling pedal 85R, the pedal is inclined forward downward, so that the bending of the ankle can be reduced. You can easily put your foot on the pedal and easily step on the pedal.
Further, the first pedal shaft 104L located on the upper surface side of the first traveling pedal 85L and supporting the first traveling pedal 85L so as to be swingable back and forth, and the first pedal shaft 104L located on the upper surface side of the second traveling pedal 85R. A second pedal shaft 104R that supports the two-run pedal 85R so as to be swingable back and forth may be provided.

According to this configuration, by aligning the arch with the first pedal shaft 104L and the second pedal shaft 104R and placing the foot on the first running pedal 85L and the second running pedal 85R, the foot can be stretched even on slopes. , Less tiring.
Further, the first pedal shaft 104L is provided behind the central portion of the first traveling pedal 85L in the front-rear direction K1, and the second pedal shaft 104R is provided behind the central portion of the second traveling pedal 85R in the front-rear direction K1. It may have been.

According to this configuration, the first pedal shaft 104L and the second pedal shaft 104R can be easily aligned with the position of the arch.
Further, it has a floor portion 5B that supports the driver's seat 6, a base 86 that is erected on the floor portion 5B, and a mounting base 93 that is attached to the upper part of the base 86, and is arranged in front of the driver's seat 6. The control table 81, the first control handle 82L provided on one side of the body width direction K2 of the mount 93, and the second control handle 82R provided on the other side of the body width direction K2 of the mount 93. The first traveling pedal 85L is provided below one side of the body width direction K2 of the mounting base 93, and the second traveling pedal 85R is below the other side of the mounting base 93 in the body width direction K2. It may be provided in.

According to this configuration, the taller the person, the more the upper space is used, and the compaction of the arrangement portion of the driver's seat 6 in the front-rear direction can be achieved. Further, for example, in the work machine 1 in which the driver's seat 6 is provided in the cabin 5, the dimensions of the cabin 5 in the front-rear direction K1 can be made compact.
Further, the rear portion of the first traveling pedal 85L is located below one side portion of the driver's seat 6 in the body width direction K2, and the second traveling pedal 85R is located below the other side portion of the driver's seat 6 in the aircraft width direction K2. The rear may be located.

According to this configuration, the driver's seat 6 can be brought closer to the first traveling pedal 85L and the second traveling pedal 85R, and the front-rear direction of the driving unit 42 including the driver's seat 6, the first traveling pedal 85L and the second traveling pedal 85R. The dimensions of K1 can be compactly formed.
The work machine 1 is provided on the driver's seat 6, the control table 81 provided in front of the driver's seat 6, the first control handle 82L provided on one side of the machine width direction K2 in the control table 81, and the other side. It also includes a second control handle 82R and a monitor 84 provided between the first control handle 82L and the second control handle 82R.

According to this configuration, since the monitor 84 is provided between the first steering wheel 82L and the second steering wheel 82R, when the first steering wheel 82L and the second steering wheel 82R are gripped and operated. The movement of the line of sight when checking the monitor 84 can be reduced. This makes it possible to improve the visibility of the monitor 84 and the operability of the control member 82.

Further, the traveling device 3 may be provided with a traveling operation member 85 provided on the floor portion 5B in front of the driver's seat 6 and operated by stepping on the traveling device 3.
According to this configuration, the monitor 84 can be provided between the first control handle 82L and the second control handle 82R by operating the travel device 3 by the travel operation member 85 that is stepped on. Further, the traveling device 3 can be operated by the traveling operating member 85 while holding the first steering wheel 82L and the second steering handle 82R.

Further, the control table 81 has a base 86 erected on the floor portion 5B and a mounting base 93 fixed to the upper part of the base 86, and the monitor 84 is a mounting base 93 in the body width direction K2. The first control handle 82L is arranged in the central part, the first control handle 82L is arranged on one side of the body width direction K2 of the mounting base 93, and the second control handle 82R is arranged on the other side of the body width direction K2 of the mounting base 93. The traveling operation member 85 is arranged below the first traveling pedal 85L arranged below one side portion of the machine body width direction K2 of the mounting base 93 and below the other side portion of the mounting base 93 in the machine body width direction K2. It may also have a second traveling pedal 85R.

According to this configuration, a space where the driver's legs can be placed is formed below the first steering wheel 82L and the second steering wheel 82R, and the driver's seat 6 can be brought closer to the cockpit 81. As a result, the dimensions of the driver's unit 42 including the cockpit 81 and the driver's seat 6 in the front-rear direction K1 can be made compact.
Further, a first armrest 83L extending rearward from the rear side of the first steering handle 82L in the cockpit 81 and a second armrest 83R extending rearward from the rear side of the second steering handle 82R in the cockpit 81 are provided. In the steering wheel 82L and the second steering wheel 82R, the driver sitting in the driver's seat 6 puts one elbow on the first armrest 83L to grip the first steering wheel 82L, and puts the other armrest on the second armrest 82R. When the second steering wheel 82R is gripped in this state, the driver may be arranged in a position where the driver leans forward.

According to this configuration, since the driver's eyes are close to the monitor 84, the visibility of the monitor 84 can be improved.
Further, the monitor 84 includes an airframe 2 on which the driver's seat 6 and the cockpit 81 are mounted, and an image pickup device 43 that captures an image of the surroundings of the machine body 2, even if the monitor 84 can display an image captured by the image pickup device 43. good.

According to this configuration, the driver can easily check the surroundings of the airframe 2 while keeping the operating posture while holding the first steering wheel 82L and the second steering wheel 82R. For example, if the driver is holding the first steering wheel 82L and the second steering wheel 82R in a forward leaning posture, it is difficult to check the rear of the aircraft 2, but the first steering wheel 82L and the second steering wheel 82R By providing the monitor 84 in between, the rearward confirmation can be easily performed.

The first steering handle 82L, the second steering handle 82R, and the monitor 84 may be arranged side by side in the aircraft width direction K2.
According to this configuration, the first steering wheel 82L, the second steering wheel 82R, and the monitor 84 can be arranged compactly.
The working machine 1 includes a substrate 9, a motor chamber ER formed on the substrate 9, a prime mover E1 housed in the prime mover chamber ER, a cooling fan F1 for generating cooling air for cooling the prime mover E1, and a prime mover E1. The first exhaust section (exhaust passage 228) that discharges the cooling air flowing between the motor chamber ER and the ceiling portion (bonnet upper portion 183) to the outside of the motor chamber ER, and the bottom portion of the motor E1 and the motor chamber ER (board 9). , A second discharge unit (guide member 213) for discharging the cooling air flowing between the first partition body 208 and the second partition body 209) to the outside of the motor chamber ER.

According to this configuration, it is possible to improve the cooling efficiency of the prime mover E1 by smoothing the flow of the cooling air for cooling the upper portion and the lower portion of the prime mover E1.
Further, an exhaust port 203 for discharging the exhaust gas of the prime mover E1 is arranged in the prime mover room ER, and the first discharge portion (exhaust passage 228) is located between the prime mover E1 and the ceiling portion (the upper part of the bonnet 183). The flowing cooling air and the exhaust gas of the prime mover E1 discharged from the exhaust port 203 are discharged to the outside of the prime mover room ER.

According to this configuration, since the exhaust pipe for exhausting the exhaust gas of the prime mover E1 does not go out of the prime mover room ER, it is possible to eliminate protrusions, reduce the exhaust gas of the exhaust gas of the prime mover E1, and make an exhaust noise. Can be reduced.
Further, the prime mover room ER is provided with a downstream side wall portion (bonnet rear portion 184, pump partition 2222, lateral reinforcing plate 216) which is a wall portion on the downstream side in the flow direction of the cooling air flowing on the prime mover E1, and is provided with a first discharge portion (1st discharge portion (). The exhaust passage 228) is provided in the ceiling portion (bonnet upper portion 183), the downstream side wall portion, or between the ceiling portion and the downstream side wall portion, and the second discharge portion (guide member 213) is provided in the bottom portion (board 9, substrate 9,). It may be provided in the first partition body 208, the second partition body 209), the downstream side wall portion, or between the bottom portion and the downstream side wall portion.

According to the above configuration, the cooling air flowing between the prime mover E1 and the ceiling of the motor chamber ER and the cooling air flowing between the prime mover E1 and the bottom of the prime mover chamber ER are appropriately sent to the outside of the prime mover chamber ER. Can be discharged.
Further, the hydraulic pump P1 attached to the downstream side in the flow direction of the cooling air flowing on the prime mover E1 in the prime mover E1 and the oil pan 217 arranged at the bottom of the prime mover E1 are provided, and the prime mover room ER is an oil pan. The first partition body 208 arranged on one side of the 217 and the second partition body 209 arranged on the other side of the oil pump 217 are provided, and the second discharge portion is the first partition body on the downstream side wall portion. A hollow guide member 213 is provided which passes under the hydraulic pump P1 through a position corresponding to the region between the first partition body and the second partition body, and the guide member 213 includes the first partition body 208 and the second partition body 209. The cooling air flowing between them is guided from the inside of the prime mover chamber ER to the outside of the prime mover chamber ER by passing under the hydraulic pump P1.

According to the above configuration, the cooling air flowing below the prime mover E1 can be appropriately discharged.
Further, the surface of the ceiling portion on the prime mover E1 side may have a flat surface shape or a shape that smoothly changes along the flow direction of the cooling air. Further, the prime mover chamber ER is provided with side wall portions (first bonnet side portion 181 and second bonnet side portion 182) on the side surface in a direction substantially perpendicular to the flow direction of the air flowing on the prime mover chamber ER, and is lateral. The surface of the wall portion on the prime mover E1 side may have a flat surface shape or a shape that smoothly changes along the flow direction of the cooling air.

Further, the ceiling portion includes the upper cover 206 and the lower cover 207 provided below the upper cover 206.
An air cleaner 201 for purifying the air sucked by the prime mover E1 is provided in the intake chamber 204 partitioned by the upper cover 206 and the lower cover 207.
According to the above configuration, it is possible to prevent the air cleaner 201 from obstructing the flow of the cooling air.

The work machine 1 covers the machine body 2, the driver's seat 6 mounted on the machine body 2, the prime mover E1 mounted on the side of the driver's seat 6 in the machine body 2, and the side of the prime mover E1 on the driver's seat 6 side. A cover member (third cover body) that covers the arrangement portion of the equipment (swivel joint S1, swivel motor M3, control valve V1) provided between the 1 bonnet side portion 181 and the 1st bonnet side portion 181 and the driver's seat 6. 17), and the side surface of the cover member on the prime mover E1 side is arranged so as to be adjacent to and opposed to the first bonnet side portion and covers the side surface of the first bonnet side portion.

According to this configuration, the first bonnet side portion 181 and the cover member can form a double-structured sound insulation mechanism on the side of the driver's seat 6 side of the prime mover room ER. As a result, it is possible to effectively suppress the sound of the prime mover E1 from being transmitted to the driver's seat 6 side.
Further, the surface of the first bonnet side portion 181 on the prime mover E1 side may have a flat surface shape or a shape that smoothly changes along the flow direction of the cooling air that cools the prime mover E1.

According to this configuration, the flow of the cooling air flowing to the side of the prime mover E1 can be improved.
Further, a second bonnet side portion 182 that covers the side of the prime mover E1 opposite to the driver's seat 6 is provided, and the second bonnet side portion 182 covers the side of the prime mover room ER accommodating the prime mover E1 so as to be openable and closable. The opening / closing bonnet 193 may be provided, and the opening / closing bonnet 193 may have an outer cover member 193A which is a wall portion on the outer side and an inner cover member 193B which is a wall portion on the inner side.

According to this configuration, the side of the prime mover E1 opposite to the driver's seat 6 can have a double structure sound insulation structure with the outer cover member 193A and the inner cover member 193B. As a result, it is possible to suppress the sound of the prime mover E1 from leaking from the prime mover room ER. Further, even if the second bonnet side portion 182 is formed into a double structure, the prime mover E1 can be accessed by one action by opening the opening / closing bonnet 193.

Further, the surface of the inner cover member 193B on the prime mover E1 side may have a flat surface shape or a shape that smoothly changes along the flow direction of the cooling air that cools the prime mover E1.
According to this configuration, the flow of the cooling air flowing to the side of the prime mover E1 can be improved.
Further, a bonnet upper portion 183 that covers the upper part of the prime mover E1 is provided, and the second bonnet side portion 182 supports the bonnet upper portion 183 together with the first bonnet side portion 181 and has a side plate having an opening 182B that is opened and closed by the opening / closing bonnet 193. It may have 182A.

According to this configuration, the side plate 182A has a function of supporting the upper portion 183 of the bonnet and a function of covering the periphery of the opening 182B opened / closed by the opening / closing bonnet 193, and the structure can be simplified.
Further, the bonnet upper portion 183 has an upper cover 206 and an upper cover 207 provided below the upper cover 206, and the upper cover 207 is provided over the first bonnet side portion 181 and the side plate 182A, and the upper cover 207 is provided. The 206 may protrude from the first bonnet side portion 181 to the driver's seat 6 side and protrude from the side plate 182A to the side opposite to the driver's seat 6.

According to this configuration, it is possible to prevent water on the upper cover 206 from entering the first bonnet side portion 181 and the side plate 182A side, and by extension, prevent water from entering the prime mover chamber ER. be able to. In the end, rust can be prevented.
Further, a bonnet rear portion 184 provided over the first side portion bonnet 181 and the side plate 182A and covering the rear of the prime mover E1 and a rear cover body (fourth cover body 18) covering the members provided behind the bonnet rear portion 184. May be provided.

According to this configuration, the rear portion of the bonnet 184 and the rear cover body can form a double sound insulation structure behind the prime mover E1. As a result, it is possible to suppress the sound of the prime mover E1 from leaking from the prime mover room ER.
A substrate 9 constituting the bottom of the machine body 2 and a partition body (first partition body 208) provided between the substrate 9 and the first side bonnet 181 may be provided.

According to this configuration, the partition body can prevent the sound of the prime mover E1 from wrapping around from below the first side bonnet 181 to the driver's seat 6 side.
The work machine 1 is a hydraulic equipment arrangement unit in which the machine body 2, the prime mover E1 mounted on the machine body 2, the hydraulic pump P1 attached to the prime mover E1, the prime mover room ER accommodating the prime mover E1, and the hydraulic pump P1 are arranged. It is provided with a pump partition 222 that partitions the 13 and the pump partition 222.

According to this configuration, the hydraulic equipment arrangement portion 13 in which the hydraulic pump P1 is arranged can be partitioned from the prime mover room ER by the pump partition 222, and the temperature rise in the hydraulic equipment arrangement portion 13 due to the heat of the prime mover E1 is suppressed. be able to.
Further, a bonnet (second cover body 16) that covers the prime mover E1 is provided, and the pump partition 222 is provided between the prime mover E1 and the bonnet to cover the periphery of the hydraulic pump P1 and is located on the hydraulic device arrangement portion 13 side. It may be open toward you.

According to this configuration, the prime mover chamber ER and the hydraulic equipment arranging unit 13 can be satisfactorily partitioned, and the heat of the prime mover E1 can be suppressed from being transferred to the hydraulic equipment arranging unit 13.
Further, the pump partition 222 has a tubular shape protruding from the insertion hole 223 formed in the bonnet toward the prime mover chamber E1, and the end portion of the pump partition 222 on the hydraulic device arrangement portion 13 side is an insertion hole formed in the bonnet. A part of the hydraulic pump P1 on the hydraulic equipment arrangement portion 13 side, which is attached to the edge portion of the 223, may protrude from the pump partition 222 toward the hydraulic equipment arrangement portion 13.

According to this configuration, it is possible to suppress the heat of the prime mover E1 from being transferred to the hydraulic equipment arrangement unit 13.
Further, a guide member 213 provided below the hydraulic pump P1 to guide the cooling air discharged from the prime mover chamber ER to the outside of the prime mover chamber ER, and a guide member 213 provided on one side of the guide member 213 to guide the motor chamber ER and the hydraulic equipment. A first partition plate 214L for partitioning the arrangement portion 13 and a second partition plate 214R provided on the other side of the guide member 213 for partitioning the prime mover room ER and the hydraulic equipment arrangement portion 13 are provided, and the lower part of the bonnet is It may be connected to the first partition plate 214L and the second partition plate 214R.

According to this configuration, it is possible to form a cooling route that allows the cooling air flowing under the prime mover E1 to flow backward while partitioning the rear part of the prime mover room ER, thereby partitioning the rear part of the prime mover room ER and improving the cooling efficiency. Can be planned.
Further, a first strut (first rear strut 147A) erected on the machine body 2 on one side of the hydraulic pump P1 and a second strut (second rear strut 147B) provided on the other side of the hydraulic pump P1. And a support frame (rear support frame 147) having a beam member (first beam member 147D) connecting the upper portions of the first column and the second column to each other, and the bonnet is unilaterally with respect to the prime mover E1. The first side plate 181A which is arranged and fixed to the first support, the second side plate 182A which is arranged on the other side of the prime mover E1 and is fixed to the second support, and the first side plate 181A and the second. It may have a wall portion (bonnet rear portion 184) provided over the side plate 182A.

According to this configuration, the bonnet can be firmly supported.
The working machine 1 includes the machine body 2, the radiator R1 mounted on the machine body 2, the oil cooler O1 arranged at the first position facing the radiator R1, the radiator bracket 148 to which the radiator R1 is attached, and the oil cooler O1. The oil cooler bracket 162 is provided with an oil cooler bracket 162 to be attached, and the oil cooler bracket 162 is detachably attached to the radiator bracket 148, and the oil cooler O1 is separated from the radiator R1 from the first position by removing from the radiator bracket 148. It is possible to move to.

According to this configuration, by removing the oil cooler bracket 162 from the radiator bracket 148, a sufficient space can be created between the radiator R1 and the oil cooler O1 for cleaning, and the radiator R1 and the oil cooler O1 can be separated from each other. Can be easily cleaned.
Further, a moving space for moving the oil cooler O1 may be provided on the opposite side of the oil cooler O1 from the radiator R1.

According to this configuration, the cleaning space 164 can be easily provided between the radiator R1 and the oil cooler O1.
Can be formed.
Further, if a moving space 163 capable of forming a cleaning space 164 is provided in front of the oil cooler O1, there is nothing that significantly obstructs the flow of the cooling air in front of the oil cooler O1, so that the suction resistance of the cooling air can be reduced. Can be done.

Further, the radiator bracket 148 has a first mounting portion 152L, 152R and a second mounting portion 159L, 159R provided below the first mounting portions 152L, 152R, and the oil cooler bracket 162 is the first mounting portion. It has fixing portions 165L and 165R that are detachably fixed to the portions 152L and 152R by fixing tools 145L and 145R, and engaging portions 168L and 168R that are detachably engaged with the second mounting portions 159L and 159R. The second mounting portions 159L and 159R have an upwardly open insertion hole 161, and the engaging portions 168L and 168R have an engaging member 169 inserted into the insertion hole 161 from above and the second mounting portions 159L and 159R. It may have a contact portion 170 which is in contact with the upper surface of the surface and is received.

According to this configuration, the engaging portions 168L and 168R can be attached to and detached from the second mounting portions 159L and 159R by inserting and removing the engaging member 169 from the insertion hole 161 to attach the oil cooler bracket 162. , Easy to remove.
Further, the radiator bracket 148 may have a lower support portion 160 that supports the lower portion of the radiator R1, and the second mounting portions 159L and 159R may be provided below the lower support portion 160.

According to this configuration, when the lower portion of the radiator R1 is attached to the lower support portion 160, the second attachment portions 159L and 159R do not get in the way, and the radiator R1 can be easily attached.
Further, a support frame (front support frame 146) erected on the machine body 2 is provided, and the radiator bracket 148 is attached to the upper part of the support frame and has the first mounting portions 152L and 152R, and the support frame. It may have a second bracket 150 which is attached to the lower part of the and has the second attachment portions 159L and 159R.

According to this configuration, the support frame can be attached to the machine body 2 in a state where the radiator bracket 148 and the radiator R1 are assembled to the support frame (in a subassembled state), and the assembly can be facilitated.
Further, a support frame (front support frame 146) erected on the front side of the side portion of the machine body 2 and a cover body covering the radiator R1 and the oil cooler O1 are supported by the support frame so as to be swingable up and down. A cover body (first cover body 15) is provided, the radiator R1 is arranged on the front side of the support frame, the oil cooler O1 is arranged on the front side of the radiator R1, and the cover body is pivotally supported by the support frame. The front of the oil cooler O1 may be opened by swinging upward. According to this configuration, when the cover body is swung upward and opened, the front of the oil cooler O1 becomes open, and the oil cooler O1 can be easily moved. As a result, the radiator R1 and the oil cooler O1 can be easily cleaned.

Further, a cover body (first cover body 15) that covers the radiator R1 and the oil cooler O1, a prime mover E1 arranged behind the radiator R1, and a prime mover E1 arranged between the prime mover E1 and the radiator R1 are arranged and flow backward. A cooling fan F1 for generating cooling air may be provided, and the cover body may have an outside air intake port 19 for taking in outside air into the cover body on the side surface of the front portion.
According to this configuration, by providing the outside air intake port 19 on the side surface of the front portion of the cover body, an obstacle such as a tree branch is pierced into the outside air intake port 19 when the work machine 1 is being advanced. Can be prevented.

Further, the condenser D1 for cooling the refrigerant of the air conditioner and the condenser bracket 171 attached to the oil cooler bracket 162 and to which the condenser D1 is attached may be provided. According to this configuration, the capacitor D1 can be easily cleaned.
The hydraulic oil tank structure includes a tank body 28 for storing hydraulic oil, a partition wall 31 that divides the inside of the tank body 28 into an upper chamber 28K on the upper side and a lower chamber 28L on the lower side, and a partition wall 31 at the center of the partition wall 31. The main passage 38 that communicates the upper chamber 28K and the lower chamber 28L, the suction pipe 30 that allows the hydraulic oil of the lower chamber 28L to flow out to the outside of the tank, and the hydraulic oil that returns to the tank body 28 to the upper chamber 28K. A return pipe 29 for flowing in is provided, and the return pipe 29 is arranged so that the flow direction of the hydraulic oil flowing from the return pipe into the upper chamber 28K is different from the direction toward the main passage 38. ..

According to this configuration, the return hydraulic oil flows into a position outside the main passage 38 in the upper chamber 28K, and causes a flow of the hydraulic oil flowing around the main passage 38. As a result, the return hydraulic oil is well mixed with the hydraulic oil in the tank body 28, and the temperature unevenness of the hydraulic oil can be suppressed.
Further, the tank body 28 can be reinforced by the partition wall 31. By reinforcing the tank body 28, it is possible to prevent deformation and noise generation due to the internal pressure of the tank body 28.

Further, the return pipe 29 may be arranged so that the flow direction is inclined in the horizontal direction with respect to the direction toward the main passage 38.
According to this configuration, the flow of hydraulic oil flowing around the main passage 38 is satisfactorily generated.
Further, the tank main body 28 has an upper wall 28A, a lower wall 28B, and a plurality of vertical walls connecting the upper wall 28A and the lower wall 28B, and the return pipe 29 is attached to the plurality of vertical walls. The first vertical wall 28C, the second vertical wall 28D facing the first vertical wall 28C, and the third vertical wall 28E provided along the direction from the first vertical wall 28C to the second vertical wall 28D are included. The return pipe 29 may be arranged so that the flow direction faces the second vertical wall 28D and is deviated from the main passage 38 toward the third vertical wall 28E.

According to this configuration, the hydraulic oil can be satisfactorily flowed along the inner surface of the tank body 28, and the return hydraulic oil can be satisfactorily mixed with the hydraulic oil in the tank body 28.
Further, the return pipe 29 may be arranged closer to the partition wall 31 than the upper and lower central portions of the upper chamber 28K.
According to this configuration, even if the oil level of the hydraulic oil in the tank body 28 drops, the outlet 29b of the return pipe 29 can be positioned below the oil level.

Further, a gap passage (first passage 40A to fourth passage 40D) for communicating the upper chamber 28K and the lower chamber 28L, which is formed by the edge portion of the partition wall 31 and the inner surface of the tank main body 28, may be provided. ..
According to this configuration, even when the tank body 28 is tilted, air bubbles contained in the hydraulic oil in the lower chamber 28L can be removed to the upper chamber 28K. Further, since the hydraulic oil in the upper chamber 28K flows into the lower chamber 28L through the main passage 38 and the gap passage, the hydraulic oil in the upper chamber 28K and the hydraulic oil in the lower chamber 28L can be satisfactorily mixed.

Further, the tank main body 28 is formed in a prismatic shape, and the gap passage may include passages (first passage 40A to fourth passage 40D) provided in a plurality of corner portions 28G to 28J of the tank main body 28. ..
According to this configuration, even if the tank main body 28 is tilted, air bubbles contained in the hydraulic oil of the lower chamber 28L can be removed from any of the plurality of passages of the tank main body 28 to the upper chamber 28K. Further, the hydraulic oil in the lower chamber 28L is sucked through the suction pipe 30, so that the hydraulic oil in the upper chamber 28K passes through the main passage 38 and the passages 40A to 40D of the plurality of corner portions of the tank main body 28. Since it flows into 28L, the hydraulic oil in the upper chamber 28K and the hydraulic oil in the lower chamber 28L can be mixed even better.

Although the present invention has been described above, it should be considered that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

9 Board (bottom)
181 1st bonnet side (side wall)
182 2nd bonnet side (side wall)
183 Upper part of bonnet (ceiling)
184 Rear bonnet (downstream side wall)
200 Exhaust section 201 Air cleaner 203 Exhaust port section 204 Intake chamber 206 Top cover 207 Bottom cover 208 First partition (bottom)
209 2nd partition (bottom)
213 Guide member (second discharge section)
213A Upper wall 213B 1st standing wall 213C 2nd standing wall 216 Horizontal reinforcing plate (downstream side wall)
217 Oil pan 222 Pump partition (downstream side wall)
226 1st cooling passage (1st cooling route)
227 Second cooling passage (second cooling route)
228 Exhaust channel (1st exhaust section)
E1 prime mover F1 cooling fan P1 hydraulic pump K2 body width direction

Claims (6)

With the board
The prime mover chamber formed on the substrate and
The prime mover housed in the prime mover room and
A cooling fan that generates cooling air to cool the prime mover,
A first discharge unit that discharges the cooling air flowing between the prime mover and the ceiling portion of the prime mover room to the outside of the prime mover room, and
It is provided with a second discharge unit that discharges the cooling air flowing between the prime mover and the bottom of the prime mover chamber to the outside of the prime mover chamber.
The exhaust port portion that discharges the exhaust gas of the prime mover into the prime mover chamber is arranged in the prime mover chamber and outside the first discharge portion in a space that is not partitioned from the space in which the prime mover is arranged .
The cooling air flowing between the prime mover and the ceiling portion and the exhaust gas of the prime mover discharged from the exhaust port portion are arranged inside the prime mover and outside the first discharge portion. It is introduced into the first exhaust unit by merging in a space that is not partitioned from the space, and the exhaust that is a mixture of the cooling air and the exhaust gas is discharged to the outside of the prime mover room through the first exhaust unit . Working machine. The exhaust gas purifying device provided on the downstream side in the flow direction of the cooling air flowing on the prime mover in the prime mover is provided.
The work machine according to claim 1, wherein the exhaust port portion discharges the exhaust gas purified by the exhaust gas purification device into the prime mover room. The ceiling portion includes an upper cover and a lower cover provided below the upper cover.
The motor chamber has a downstream side wall portion that is a wall portion on the downstream side in the flow direction of the cooling air flowing on the prime mover, and the first discharge portion formed by the rear portion of the lower cover and the downstream side wall portion. Equipped with
The cooling air flowing between the prime mover and the ceiling portion and the exhaust gas of the prime mover discharged from the exhaust port portion arranged in the prime mover chamber and below the first discharge portion are the exhaust gas in the prime mover chamber. The exhaust gas, which is a mixture of the cooling air and the exhaust gas, is discharged to the upper part of the prime mover chamber through the first discharge part by being merged under the first discharge part and introduced into the first discharge part. The working machine according to claim 1 or 2 . The working machine according to any one of claims 1 to 3, wherein the first discharging unit is formed in a zigzag shape bent in the front-rear direction. With the board
The prime mover chamber formed on the substrate and
The prime mover housed in the prime mover room and
A cooling fan that generates cooling air to cool the prime mover,
A first discharge unit that discharges the cooling air flowing between the prime mover and the ceiling portion of the prime mover room to the outside of the prime mover room, and
A second discharge unit that discharges the cooling air flowing between the prime mover and the bottom of the prime mover chamber to the outside of the prime mover chamber, and
A hydraulic pump attached to the downstream side of the prime mover in the flow direction of the cooling air flowing on the prime mover,
With an oil pan located at the bottom of the prime mover
The prime mover chamber includes a downstream side wall portion which is a wall portion on the downstream side in the flow direction of the cooling air flowing on the prime mover.
The first partition arranged on one side of the oil pan and
It has a second partition arranged on the other side of the oil pan, and has.
The second discharge portion includes a hollow guide member that passes under the hydraulic pump through a position corresponding to a region between the first partition body and the second partition body in the downstream side wall portion.
The guide member is a working machine that guides the cooling air flowing between the first partition body and the second partition body from the prime mover chamber to the outside of the prime mover chamber by passing under the hydraulic pump. With the board
The prime mover chamber formed on the substrate and
The prime mover housed in the prime mover room and
A cooling fan that generates cooling air to cool the prime mover,
A first discharge unit that discharges the cooling air flowing between the prime mover and the ceiling portion of the prime mover room to the outside of the prime mover room, and
A second discharge unit that discharges the cooling air flowing between the prime mover and the bottom of the prime mover chamber to the outside of the prime mover chamber, and
A hydraulic pump attached to the downstream side of the prime mover in the flow direction of the cooling air flowing on the prime mover,
Equipped with
The second discharge portion is provided below the hydraulic pump and is formed hollow, and the cooling air flowing between the prime mover and the bottom of the prime mover chamber passes under the hydraulic pump and the prime mover chamber. Has a guide member that guides the outside of the
The guide member is a working machine that movably supports the hydraulic pump with respect to the prime mover.

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