JP2019152152A - Exhaust treatment device, and work machine with the same - Google Patents

Abstract

To provide an exhaust treatment device comprising an attachment structure for a cover which is attachable to exhaust treatment units in various forms in a general-purpose manner.SOLUTION: An exhaust treatment device comprises: an exhaust treatment unit for treating fine particles contained in exhaust air from a motor provided in a work machine; a bracket which is attached to the exhaust treatment unit; and a first cover which is attached to the bracket and covers at least a part of the exhaust treatment unit. The exhaust treatment unit includes: a first exterior member including a first flange part; a second exterior member including a second flange part; and a first connection part connecting the first flange part and the second flange part. The bracket includes: a main-body-side attachment which is attached to the first connection part; and a cover attachment to which the first cover is attached.SELECTED DRAWING: Figure 20

Description

  The present invention relates to an exhaust processing apparatus that processes fine particles contained in exhaust from a prime mover, and a working machine including the exhaust processing apparatus.

Conventionally, a working machine disclosed in Patent Document 1 is known.
In the working machine disclosed in Patent Document 1, the DPF muffler is arranged on the upper side of the prime mover arranged on the machine body of the working machine, and the air cleaner is arranged on the side opposite to the prime mover of the DPF muffler. A bonnet that covers the top and sides of the DPF muffler and the air cleaner is provided, and a cover (heat insulating cover) that covers the top of the exhaust processing unit and the side of the air cleaner is attached to the DPF muffler.

JP2013-44240A

However, in the working machine of Patent Document 1, since the cover is directly attached to the DPF muffler, the cover is attached to an appropriate position when the form of the DPF muffler (position of mounting holes, etc.) is changed. There was a possibility that it could not be.
The present invention has been made to solve such problems of the prior art, and an object of the present invention is to provide a cover that can be universally attached to various types of exhaust treatment units.

  An exhaust treatment apparatus according to an aspect of the present invention includes an exhaust treatment unit that processes fine particles contained in exhaust from a prime mover provided in a work machine, a bracket attached to the exhaust treatment unit, an exhaust treatment attached to the bracket, and A first cover that covers at least part of the first portion, and the exhaust processing portion includes a first exterior member having a first flange portion, a second exterior member having a second flange portion, a first flange portion, and a first flange portion. The bracket has a main body side attachment portion attached to the first connection portion and a cover attachment portion to which the first cover is attached.

  According to the exhaust treatment apparatus, the first cover can be attached to the exhaust treatment unit via the bracket separate from the first cover. Therefore, it can be attached to various forms of exhaust treatment units for general use.

It is a right rear perspective view which shows the inside of a motor | power_engine room, etc. It is a rear view which shows the inside of a motor | power_engine room, etc. It is a right back perspective view, such as a turning frame. It is a right front perspective view which shows a fuel tank, a fuel pump, a main filter, a sub filter, etc. It is a right back perspective view showing a motor, a support stay, a support bracket, a mount member, an adapter, etc. It is a top view which shows a motor | power_engine, a hydraulic pump, an adapter, a pipe material, a mount member, etc. FIG. It is a right view which shows a motor | power_engine, a hydraulic pump, an adapter, a pipe material, a mount member, etc. FIG. It is a systematic diagram of a fuel circuit. It is a right back perspective view showing a plurality of pipes connected to an adapter and the adapter concerned. It is a right rear perspective view showing an adapter. It is a right rear perspective view which shows the modification of an adapter. It is a left view of a motor, a belt tension adjusting device, etc. It is a left rear perspective view which shows the principal part of a belt tension adjustment apparatus. It is a left view which shows the motion of a belt tension adjustment apparatus. It is a rear view which shows a fan shroud, a fan cover, etc. It is a right view which shows a fan, a fan shroud, a fan cover, etc. It is a right rear perspective view which shows a fan shroud, a fan cover, etc. It is a disassembled perspective view of a fan cover. FIG. 10 is a left rear perspective view showing the positional relationship between the fan cover with the second cover member removed and the belt tension adjusting device. It is a right rear perspective view showing arrangement of a DPF muffler, a supercharger, a first cover, and a second cover. It is a perspective view which shows the attachment structure of a 1st cover and a bracket. It is the perspective view which looked at the 1st cover from the inner surface side. It is a right rear perspective view which shows the attachment method of the bracket to a DPF muffler. It is a right rear perspective view which shows a 2nd cover, a rear leg part, etc. It is a left rear perspective view which shows a turning board | substrate, a structure, a support bracket, etc. It is a top view which shows the inside of a motor | power_engine room. It is a side view of a working machine. It is a top view of an airframe and a cabin.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
<Overall configuration>
First, the overall configuration of the work machine 1 will be described.
27 and 28 are schematic diagrams for explaining the overall configuration of the work machine 1 according to the present embodiment. In this embodiment, the backhoe which is a turning working machine is illustrated as a working machine.

The work machine 1 includes a machine body 2, a cabin 3, a traveling device 4, and a work device 5.
Hereinafter, the front side (left side in FIG. 27) of the driver seated in the driver's seat 6 of the cabin 3 is front, the rear side (right side in FIG. 27) is rearward, and the left side of the driver (front side in FIG. 27). The left side and the right side of the driver (the back side in FIG. 27) will be described as the right side. Further, the horizontal direction K2 (see FIG. 28), which is a direction orthogonal to the front-rear direction K1 (see FIG. 27), will be described as the body width direction.

The airframe 2 has a swivel base 7 supported on the traveling device 4. The swivel base 7 is supported on the travel device 4 so as to be turnable to the left and right around the turning axis X in the vertical direction via a turning bearing (not shown). The swivel base 7 has a substrate (swivel substrate) 8 that revolves around the revolving axis X. The swivel board 8 is formed of a steel plate or the like and is connected to a swivel bearing.
A prime mover room ER is provided at the rear of the swivel base 7. As shown in FIGS. 1, 2, 28, and the like, the prime mover room ER includes a prime mover 10, a hydraulic pump 11, a fan 12, a radiator 14, a compressor 37, an alternator 38, and the like. The prime mover 10 is an engine in the present embodiment, and more specifically a diesel engine. As shown in FIG. 28, the prime mover 10 is disposed sideways so that the output shaft 10A faces the body width direction. Specifically, the tip of the output shaft 10A faces left. A hydraulic pump 11 is provided on the right side of the prime mover 10. The hydraulic pump 11 is driven by the prime mover 10 and discharges hydraulic oil for operating a hydraulic actuator equipped in the work machine 1. A fan 12 is provided on the left side of the prime mover 10. The fan 12 is attached to the output shaft 10A of the prime mover and generates an air flow from the left to the right. The fan 12 is surrounded by a fan shroud 13. As shown in FIGS. 2 and 28, the radiator 14 is disposed on the left side of the fan 12 and is cooled by driving the fan 12. The radiator 14 cools the cooling water supplied to the prime mover 10. The compressor 37 is disposed above the left front portion of the prime mover 10 and compresses the refrigerant of the air conditioner that cools the cabin 3. The alternator 38 is disposed above the right front portion of the prime mover 10 and outputs DC power for storing in the battery. The hydraulic pump 11, the fan 12, the alternator 38, and the compressor 37 are driven by the power of the prime mover 10. A fuel cooler 15 is provided on the left side of the radiator 14. A particle removing device 18 is provided at the upper right of the prime mover 10.

  As shown in FIGS. 4 and 28, a side room (tank room) TR is provided on the right side of the swivel base 7. A fuel tank 19 that stores fuel for the prime mover 10 is mounted in the side room TR. A control valve (not shown) is provided above the rear portion of the fuel tank 19. The control valve is a collection of control valves that control a plurality of hydraulic actuators (such as hydraulic cylinders) installed in the work machine 1. Behind the fuel tank 19 is provided a hydraulic oil tank 21 for storing hydraulic oil supplied to the hydraulic actuator. On the right side of the hydraulic oil tank 21 are provided a fuel filter 22 that removes particles mixed in the fuel, a separator 23 that separates and removes water mixed in the fuel, and a fuel pump 24 that sends fuel to the prime mover 10. Yes. The fuel pump 24 has a suction side connected to the fuel tank 19 and a discharge side connected to the fuel filter 22.

  As shown in FIGS. 27 and 28, the upper, right, left, and rear of the prime mover room ER are covered with a cover 30. The cover 30 includes an upper cover 30A and a rear cover 30B. The upper cover 30A covers the upper front side of the prime mover room ER. The rear cover 30B covers the rear side and the rear side above the prime mover room ER. The upper and right sides of the side room TR are covered with a side cover 35. A front cover 113 is provided in front of the cover 30 and to the left of the side cover 35.

As shown in FIGS. 27 and 28, the cabin 3 is mounted on a front portion on one side (left side) in the body width direction on the revolving substrate 8. Inside the cabin 3, a driver's seat 6, a control device (not shown), and the like are provided.
As shown in FIG. 27, the traveling device 4 includes a traveling frame 41 and a crawler device mounted on the left side and the right side of the traveling frame 41. The crawler device includes an idler 42, a sprocket 43, a plurality of wheels 44, and these idlers 42, sprockets 43, and a crawler belt 45 wound around the wheels 44. A dozer 26 is provided at the front portion of the traveling device 4.

  As shown in FIG. 27, the work device 5 is attached to the front part of the swivel base 7. The work device 5 includes a boom 27, an arm 28, and a work tool 29. Further, the work device 5 includes a boom cylinder 47, an arm cylinder 48, and a work tool cylinder 49 as drive mechanisms (hydraulic actuators) for the boom 27, arm 28, and work tool 29. The boom cylinder 47, the arm cylinder 48 and the work tool cylinder 49 are constituted by hydraulic cylinders.

  As shown in FIG. 27, the base portion of the boom 27 rotates around the horizontal axis (axis in the body width direction) via the first pivot 51 to the first bracket 50 provided at the right front portion of the turning substrate 8. It is freely pivoted. On the tip side of the boom 27, the arm 28 is pivotally supported via a second pivot 52 so as to be rotatable around the horizontal axis. A work tool 29 is pivotally supported at the distal end of the arm 28 via a third pivot 53 so as to be rotatable around the horizontal axis. In this embodiment, a bucket is mounted as the work tool 29, but other work tools may be mounted instead of or in addition to the bucket.

The boom cylinder 47 is provided across the second bracket 55 provided at the front portion of the turning substrate 8 and a midway portion in the longitudinal direction of the boom 27. The second bracket 55 is provided with a fourth pivot 54 that pivotally supports the base end portion of the boom cylinder 47. The boom 27 swings around the first pivot 51 by extending and retracting the boom cylinder 47. The arm cylinder 48 is provided across the middle part in the longitudinal direction of the boom 27 and the base part of the arm 28. The arm 28 swings around the second pivot 52 by extending and contracting the arm cylinder 48. The work tool cylinder 49 is provided across the base of the arm 28 and one end side of the first link 56 and the second link 57. The other end side of the first link 56 is pivotally supported by the work tool 29. The other end side of the second link 57 is pivotally supported by the distal end portion of the arm 28. By extending and contracting the work tool cylinder 49, the work tool 29 swings around the third pivot 53.
<Swivel frame, structure>
As shown in FIG. 3, on the revolving substrate 8, a frame constituent material that constitutes a revolving frame by being integrated with the revolving substrate 8 is provided. The frame constituent material is connected to the turning substrate 8 by welding.

The frame constituent material includes a first vertical rib 61, a second vertical rib 62, a support plate 60, a first partition plate 64, a second partition plate 65, a rear frame 66, a third vertical rib 63, And a support base 68.
The first vertical rib 61 and the second vertical rib 62 are provided on the upper portion of the revolving substrate 8 with an interval in the body width direction. The first vertical rib 61 is provided on one side (left side) of the revolving substrate 8 in the body width direction. The second vertical rib 62 is provided on the other side (right side) of the revolving substrate 8 in the body width direction. As shown in FIG. 3, the first vertical ribs 61 and the second vertical ribs 62 extend substantially linearly from the front to the rear on the revolving substrate 8. The support plate 60 connects the upper part of the first vertical rib 61 and the upper part of the second vertical rib 62.

The first partition plate 64 and the second partition plate 65 are provided in front of the prime mover room ER and extend in the body width direction. The right end portion of the first partition plate 64 is connected to the left side surface of the second vertical rib 62. The second partition plate 65 extends from the left side of the first partition plate 64 to the left.
The third vertical rib 63 is extended in the front-rear direction. The front portion of the third vertical rib 63 is connected to the first partition plate 64 and the second partition plate 65. The rear frame 66 extends in the body width direction, and is connected to the rear end portion of the third vertical rib 63 and the rear end portion of the second vertical rib 62. A rear support member 67 described later is erected on the rear side of the rear frame 66.

As shown in FIGS. 3 and 4, the support base 68 is provided on the right portion of the turning substrate 8. As shown in FIG. 4, the hydraulic oil tank 21 is placed on the upper portion of the support base 68. A fuel tank 19 is disposed in front of the support base 68.
As shown in FIGS. 1 and 2, a support frame 90 that supports the cover 30 is provided on the revolving substrate 8. The support frame 90 includes a structure 91 erected on the revolving substrate 8 and a support portion 92 that is connected to the upper portion of the structure 91 and supports the cover 30.

The structure 91 includes a front leg portion 93, a rear leg portion 94, a connecting portion 95, a side leg portion 96, a bridging portion 97, and a support mechanism 101.
As shown in FIGS. 1 and 4, the front leg portion 93 is erected in front of the prime mover room ER. As shown in FIG. 4, the front leg portion 93 includes a column 93 </ b> A and a lower plate 93 </ b> B. The lower plate 93B is fixed to the rear portion of the upper surface of the support plate 60 with a fastening member (bolt).

As shown in FIGS. 1 and 2, the rear leg portion 94 is erected on the rear side of the prime mover room ER. Specifically, the rear leg portion 94 is fixed to the upper surface of the rear support member 67 and extends upward, then bends and extends forward. As shown in FIGS. 1, 2, 5, etc., a connecting plate 94 </ b> A is attached to the front end of the rear leg portion 94.
As shown in FIGS. 4 and 25, the connecting portion 95 extends in the front-rear direction above the prime mover room ER. The communication part 95 connects the front leg part 93 and the rear leg part 94. As shown in FIG. 25, the connecting part 95 includes a connection plate 95A, a first connecting part 95B, and a second connecting part 95C. The first connecting portion 95B and the second connecting portion 95C are connected to the front leg portion 93. The first connecting portion 95B extends from the upper part of the front leg portion 93 toward the rear. As shown in FIG. 4, the second connecting portion 95C has a front plate portion 95b and a side plate portion 95c. The front plate portion 95b covers the front of the support post 93A. The side plate portion 95c covers the left side of the column 93A and the first connecting portion 95B. The upper part of the side plate part 95c extends rearward.

A connection plate 95A is attached to the rear ends of the first connecting portion 95B and the second connecting portion 95C. As shown in FIGS. 1 and 25, the connection plate 94A and the connection plate 95A are connected by a fastening member (bolt). Thereby, the front leg part 93 and the rear leg part 94 are connected.
As shown in FIG. 2, FIG. 25, etc., the side leg part 96 is erected on one side (left side) in the body width direction. As shown in FIGS. 4 and 25, the bridging portion 97 connects the upper portion of the side leg portion 94 and the upper portion of the second connecting portion 95C.

As shown in FIG. 25, the support portion 92 supports the upper cover 30 </ b> A of the cover 30. The support portion 92 includes a first support body 98 and a second support body 99.
The first support 98 is extended to the left from the connecting portion 95. The first support 98 has a first front member 98A and a first rear member 98B. The first front member 98A and the second front member 98B extend in the body width direction in parallel to each other with an interval in the front-rear direction.

The second support body 99 extends to the right from the connecting portion 95. The second support 99 has a second front member 99A and a second rear member 99B. The first rear member 99A and the second rear member 99B extend in the body width direction in parallel to each other with an interval in the front-rear direction.
A wall plate 100 is provided between the side leg portion 96 and the connecting portion 95. The wall plate 100 rises from the front upper part of the third vertical rib 63. The wall plate 100 is disposed behind the cabin 3.
<Motor support structure>
As shown in FIGS. 2, 5, 6, and the like, the prime mover 10 is supported on the turning substrate 8 via a prime mover support 115. The prime mover support 115 has a support bracket 120 and a support stay 121. The support bracket 120 supports the front portion of the prime mover 10. The support stay 121 supports the rear part of the prime mover 10.

As shown in FIGS. 3 and 25, the support bracket 120 is disposed between the second rib 62 and the third rib 63 and extends in the body width direction. The support bracket 120 includes a lower plate 120A, an upper plate 120B, and a connecting plate 120C. The lower plate 120A, the upper plate 120B, and the connecting plate 120C are integrally formed by welding or the like.
The lower plate 120A is fixed to the upper surface of the turning substrate 8 by a fastening member (bolt). The upper plate 120B is disposed above the lower plate 120A. The connecting plate 120C is erected upward from the lower plate 120A, and connects the upper plate 120B and the lower plate 120A.

  The connecting plate 120C includes a vertical plate 120C1, a first side plate 120C2, and a second side plate 120C3. The vertical plate 120C1 extends in the body width direction. The first side plate 120C2 is connected to the right part of the vertical plate 120C1. The second side plate 120C3 is connected to the left part of the vertical plate 120C1. The first side plate 120C2 and the second side plate 120C3 are arranged to face each other and extend in the front-rear direction in parallel to each other. The vertical plate 120C1 is provided with an opening through which a pipe material or the like can be inserted. The upper end of the connecting plate 120C is inclined so as to gradually increase from the left part toward the right part. Accordingly, the upper plate 120B is inclined such that the upper surface 120a at the right part is higher than the upper surface 120b at the left part.

  As shown in FIG. 5, a first mount member 125 and a second mount member 126 are attached to the upper portion of the support bracket 120 as mount members interposed between the support bracket 120 and the prime mover 10. . The first mount member 125 is attached to the upper surface 120a of the right part of the upper plate 120B. The second mount member 126 is attached to the left upper surface 120b of the upper plate 120B. Since the upper surface 120a is higher than the upper surface 120b due to the inclination of the upper plate 120B, the first mount member 125 is disposed at a higher position than the second mount member 126.

  The first mount member 125 and the second mount member 126 each have a vibration isolation member 119 and an attachment portion 118. The anti-vibration member 119 is formed by integrating an elastic body (anti-vibration rubber) and a metal plate. The mounting part 118 (first mounting part 118A) of the first mount member 125 has a front part attached to the right part of the upper plate 120B and a rear part attached to the right front part of the prime mover 10. The attachment portion 118 (second attachment portion 118B) of the second mount member 126 has a front portion attached to the left portion of the upper plate 120B and a rear portion attached to the left front portion of the prime mover 10.

  As shown in FIG. 3 and the like, the support stay 121 includes a first support stay 121A and a second support stay 121B. As shown in FIG. 2, the first support stay 121 </ b> A is erected upward from the right part of the upper surface of the rear frame 66. The second support stay 121 </ b> B is erected upward from the left part of the upper surface of the rear frame 66. The height of the first support stay 121A is higher than the height of the second support stay 121B.

As shown in FIG. 2, a third mount member 127 is attached to the upper portion of the first support stay 121A. A fourth mount member 128 is attached to the upper portion of the second support stay 121B. Since the first support stay 121 </ b> A is higher than the second support stay 121 </ b> B, the third mount member 127 is disposed at a higher position than the fourth mount member 128.
The third mount member 127 and the fourth mount member 128 each have a vibration isolation member 119 and a mounting portion 118. The configuration of the vibration isolation member 119 is the same as the configuration of the vibration isolation member 119 described above. The attachment portion (third attachment portion 118C) of the third mount member 127 has a rear portion attached to the first support stay 121A and a front portion attached to the right rear portion of the prime mover 10. The mounting part 118 (fourth mounting part 118D) of the fourth mount member 128 has a rear part attached to the second support stay 121B and a front part attached to the left rear part of the prime mover 10.
<Adapter (fuel branch adapter)>
As shown in FIGS. 4 and 8, the work machine 1 includes a fuel circuit 25 for supplying the fuel stored in the fuel tank 19 to the prime mover 10. As shown in FIG. 8, the fuel circuit 25 has a fuel supply path 25a, a reflux path 25b, a fuel return path 25c, and an air vent path 25d.

  In the present embodiment, the prime mover 10 is a common rail diesel engine. A common rail type diesel engine has a supply pump (fuel pressure pump) that generates high-pressure fuel from supplied fuel, a rail (pressure storage chamber) that stores high-pressure fuel generated by the supply pump, and high-pressure fuel stored in the rail. It has an injector that injects by ECU (engine control unit) control.

  The fuel supply path 25 a is a path for sending the fuel stored in the fuel tank 19 to the prime mover 10. The fuel supply path 25 a connects the fuel tank 19 and the prime mover 10. In the fuel supply path 25a, a separator 23, a fuel pump 24, and a fuel filter 22 are provided in this order from the upstream side (fuel tank 19 side). The separator 23 is connected to the fuel tank 19 and removes moisture contained in the fuel. The fuel pump 24 is constituted by an electromagnetic pump, and is driven by turning on an ignition key switch to send the fuel stored in the fuel tank 19 to the prime mover 1 side. The fuel filter 22 removes foreign matters contained in the fuel sent from the fuel tank 19 to the prime mover 10 side. The fuel filter 22 includes a main filter 22a and a sub filter 22b disposed on the upstream side of the main filter 22a. As shown in FIG. 4, the sub filter 22b is disposed below the main filter 22a. The fuel pump 24 is disposed below the upper part (connection port) of the sub-filter 22b and below the separator 23.

  The reflux path 25 b is a path for returning the fuel discharged from the prime mover (common rail type diesel engine) 10 (surplus fuel in the supply pump and injector) to the fuel tank 19. The reflux path 25b connects the prime mover 10 and the most upstream position of the fuel supply path 25a (between the fuel tank 19 and the separator 23). The reflux path 25b is provided with a check valve 83 and a reflux valve 84 in order from the upstream side (the prime mover 10 side). The check valve 83 allows fuel flow in the direction from the prime mover 10 side toward the fuel tank 19 side, and blocks fuel flow in the reverse direction (direction directed from the fuel tank 19 side toward the prime mover 10 side). The recirculation valve 84 is a temperature-sensing valve, and is opened when the temperature of the fuel flowing through the recirculation path 25b is lower than a predetermined temperature and allowed to flow, and closed when the temperature is higher than the predetermined temperature. Block distribution.

  The fuel return path 25 c is a path for branching out the fuel flowing through the reflux path 25 b and returning it to the fuel tank 19 when the reflux valve 84 is closed. The fuel return path 25 c branches off from a midway part (between the check valve 83 and the prime mover 10) on the upstream side of the reflux path 25 b and connects the midway part and the fuel tank 19. A fuel cooler 15 is provided in the fuel return path 25c. The fuel cooler 15 cools the fuel that branches off from the reflux path 25 b and returns to the fuel tank 19.

The air vent path 25d is a path for removing air contained in the fuel supplied to the prime mover 10. The air vent path 25d connects the fuel filter 22 (main filter 22a) and a midway portion on the downstream side of the fuel return path 25c (between the fuel cooler 15 and the fuel tank 19).
The fuel stored in the fuel tank 19 is introduced into the fuel supply path 25 a by driving the fuel pump 24. The fuel introduced into the fuel supply path 25 a is supplied to the prime mover 1 after moisture is removed by the separator 23 and foreign matter is removed by the fuel filter 22. Before being supplied to the prime mover 1, the air contained in the fuel is removed by the fuel filter 22 and returned to the fuel tank 19 through the air vent path 25d and the fuel return path 25c.

  The fuel discharged from the prime mover 10 is introduced into the reflux path 25b. When the fuel introduced into the reflux path 25b is at a predetermined temperature or higher, the reflux valve 84 is closed, so that the fuel is introduced into the fuel return path 25c and cooled by the fuel cooler 15, and then into the fuel tank 19. Returned. When the fuel introduced into the reflux path 25b is lower than the predetermined temperature, the reflux valve 84 is opened, so that the fuel is returned to the fuel supply path 25a. Since the fuel recirculated to the fuel supply path 25a is warmed by the prime mover 10 and not cooled by the fuel cooler 15, the wax component of the fuel is not deposited. This prevents the fuel filter 22 from being clogged.

  As shown in FIG. 8, the fuel circuit 25 includes a plurality of branch paths (communication paths) 135. The plurality of branch paths 135 are branches that connect the fuel return path 25c and the middle part of the return path 25b (referred to as a first branch path 136) and the main filter 22a and the middle part of the fuel return path 25c. (Referred to as a second branch path 137). The plurality of branch paths 135 (first branch path 136 and second branch path 137) are provided in one fuel branch adapter 131.

Hereinafter, the fuel branch adapter 131 and the plurality of pipe members 130 connected to the fuel branch adapter 131 will be described mainly based on FIGS. 9 to 11. The plurality of pipe members 130 constitute a fuel supply path 25a, a reflux path 25b, a fuel return path 25c, and an air vent path 25d. The tube material 130 is a hollow hose or pipe.
FIG. 9 shows the fuel branch adapter 131 and a plurality of pipes 130, and FIG. 10 shows the fuel branch adapter 131. 9 and 10, arrow A1 indicates the front, arrow A2 indicates the rear, arrow B1 indicates the left, and arrow B2 indicates the right.

The fuel branch adapter 131 has a plurality of connection portions 132, a relay portion 133, and an attachment portion 138.
The plurality of connecting portions 132 include a first connecting portion 132a, a second connecting portion 132b, a third connecting portion 132c, a fourth connecting portion 132d, a fifth connecting portion 132e, and a sixth connecting portion 132f. Including. The plurality of connection portions 132 protrude from the outer surface of the relay portion 133. In the case of this embodiment, the relay part 133 is a hexahedral member having an upper surface, a lower surface, a front surface, a rear surface, a left surface, and a right surface. Specifically, the relay part 133 is a rectangular parallelepiped member, and the longitudinal direction faces the front-rear direction.

The connection part 132 is a hollow pipe shape, and protrudes outward from the outer surface of the relay part 133. By fitting the inner peripheral surface of the tube material 130 to the outer peripheral surface of the connection portion 132, the tube material 130 can be connected to the connection portion 132.
The first connection part 132a protrudes from the left surface of the relay part 133 toward the left. The second connecting portion 132b protrudes rearward from the rear surface of the relay portion 133 and then curves downward. The third connection portion 132c protrudes rightward from the rear portion of the right surface of the relay portion 133. The fourth connecting portion 132d protrudes rightward from the front portion of the right surface of the relay portion 133. The fifth connection portion 132e protrudes downward from the lower surface of the relay portion 133. The sixth connecting part 132f is curved upwards after protruding upward from the upper surface of the relay part 133.

  A plurality of pipes 130 are connected to the connection unit 130, respectively. The plurality of pipes 130 are pipes through which fuel for driving the prime mover 10 is circulated. The outer peripheral surfaces of the plurality of tube materials 130 are each covered with a cladding tube 130A. The plurality of tube materials 130 include a first tube material 130a, a second tube material 130b, a third tube material 130c, a fourth tube material 130d, a fifth tube material 130e, a sixth tube material 130f, and a seventh tube material 130g. .

  The first pipe member 130 a connects the first connection part 132 and the prime mover 10. The second pipe member 130b connects the second connecting portion 132b and the fuel cooler 15. The third pipe member 130 c connects the third connection portion 132 c and a check valve (valve) 83. The fourth pipe member 130d connects the fourth connection part 132d and the fuel filter 22. The fourth pipe member 130d is an air vent pipe for removing air contained in the fuel. The fifth pipe member 130e connects the fifth connecting portion 132e and the fuel cooler 15. The sixth pipe member 130f connects the sixth connecting portion 132f and the fuel tank 19. The seventh pipe member 130 g connects the fuel filter 22 and the prime mover 10. The seventh pipe member 130g is held by a clamp part 139 described later.

The inner diameter of the fourth pipe member 130d is smaller than the inner diameters of the other pipe members (first to third tube members, fifth to seventh tube members). Thereby, it can avoid that the air removed through the 4th pipe material 130d goes to the prime mover 10.
As shown in FIG. 10, a relay path 134 that relays between the plurality of connection units 130 is formed inside the relay unit 133. The relay path 134 includes a plurality of branch paths 135. Each of the plurality of branch paths 135 is a branch path that allows one connection portion 132 to communicate with another plurality of connection portions 132. The plurality of branch paths 135 include a first branch path 136 and a second branch path 137.

The first branch path 136 is formed at the rear part of the relay part 133. The first branch path 136 is a branch path that allows the first connection portion 132a to communicate with the second connection portion 132b and the third connection portion 132c. Specifically, the first branch path 136 is a T-shaped branch path including a first path 136a and a second path 136b.
The first passage 136a is a passage extending from one side to the other side in the body width direction. One end side of the first passage 136a communicates with the first connection portion 132a, and the other end side communicates with the third connection portion 132c. As a result, as shown in FIG. 8, the first pipe member 130a connected to the first connection part 132a and the third pipe member 130c connected to the third connection part 132c communicate with each other. The first pipe member 130a, the third pipe member 130c, and the first passage 136a constitute a part of the reflux passage 25b (a route from the prime mover 10 to the check valve 83).

  The second passage 136b is a passage that branches from the middle portion of the first passage 136a and extends rearward. The second passage 136b communicates with the second connection portion 132b. Accordingly, as shown in FIG. 8, the second pipe member 130b connected to the second connection part 132b is connected to the first pipe member 130a and the third connection part 132c connected to the first connection part 132a. It communicates with the tube material 130a. The second passage 136b and the second pipe material 130b constitute a part of the fuel return path 25c (a path from the middle part of the return path 25b to the inlet of the fuel cooler 15).

The second branch path 137 is formed in the front part of the relay part 133. The second branch path 137 is a branch path that allows the fourth connection portion 132d to communicate with the fifth connection portion 132e and the sixth connection portion 132f. Specifically, the second branch path 137 is a T-shaped branch path including a third path 137a and a fourth path 137b.
The third passage 137a is a passage extending in the vertical direction. As shown in FIG. 10, the first passage 136 a of the first branch 136 and the third passage 137 a of the second branch 137 are separated from each other and extend in different directions (directions orthogonal to the rear view). Is formed. One end side of the third passage 137a communicates with the fifth connection portion 132e, and the other end side communicates with the sixth connection portion 132f. Thus, the fifth pipe member 130e connected to the fifth connection part 132e and the sixth pipe member 130f connected to the sixth connection part 132f communicate with each other. The fifth pipe member 130e, the sixth pipe member 130f, and the third passage 137a constitute a part of the fuel return passage 25c (a route from the outlet of the fuel cooler 15 to the fuel tank 10).

  The fourth passage 137b is a passage branched from the middle portion of the third passage 137a and extending to the other side (right side) in the body width direction. The fourth passage 137b communicates with the fourth connection portion 132d. Accordingly, the fourth pipe member 130d connected to the fourth connection part 132d communicates with the sixth pipe member 130f connected to the sixth connection part 132f and the fifth pipe member 130e connected to the fifth connection part 136e. The fourth passage 137b and the fourth pipe material 130d constitute an air vent path 25d.

  As described above, the first branch path 136 and the second branch path 137 are T-shaped branch paths. The two T-shaped branch paths are arranged side by side in the relay unit 133 so as to be spaced apart from each other, and the first path 136a and the third path 137a are paths that pass through the relay unit 133 linearly. Are arranged in a direction orthogonal to each other when viewed from the rear. Further, the second passage 136b branched from the first passage 136a and the fourth passage 137b branched from the third passage 137a are also arranged in directions orthogonal to each other in plan view.

The attachment portion 138 is attached to the body 2. Specifically, the attachment portion 138 is attached to the support bracket 120.
As shown in FIGS. 9 and 10, the attachment portion 138 is formed in an L shape in a side view, and the rear end portion is connected to the front surface of the relay portion 133. As shown in FIG. 10, a plurality (two) of holes 138 a are formed in the attachment portion 138 at intervals in the vertical direction. The hole 138a penetrates the attachment portion 138 in the body width direction (left-right direction). As shown in FIGS. 7 and 9, bolts are inserted into the plurality of holes 138a. The attachment portion 138 is attached to the attachment tool 120D connected to the support bracket 120 by bolts and nuts inserted through the holes 138a. Thereby, the attachment part 138 is attached to the support bracket 120 via the attachment 120D. As described above, the fuel branch adapter 131 can be attached to and detached from the support bracket 120 by attaching the attachment portion 138 to the attachment 120D connected to the support bracket 120 by the bolt and the nut.

  As shown in FIGS. 3 and 25, the mounting tool 120D is fixed to the first side plate 120C of the support bracket 120 by welding or the like. The mounting tool 120D is disposed between the second rib 62 and the first mount member 121 in the vertical direction. Accordingly, the fuel branch adapter 131 attached to the fixture 120D is also disposed between the second rib 62 (hereinafter sometimes referred to as “reinforcing rib 62”) and the first mount member 121 in the vertical direction. Yes.

  As shown in FIG. 10, the fuel branch adapter 131 has a clamp part 139 that holds a pipe material different from the pipe material connected to the connection part 132 among the plurality of pipe materials 130. In the case of this embodiment, the clamp part 139 holds the seventh tube material 130g. The clamp part 139 has the 1st extension part 139a, the 2nd extension part 139b, and the holding part 139c. The first extension part 139a extends downward from the attachment part 138 and then extends downward. The first extending portion 139a has an L-shaped plate shape when viewed from the front, and has one surface facing the front and the other surface facing the rear. The second extending part 139b extends rearward from the lower end of the first extending part 139a. The 2nd extension part 139b is plate shape, Comprising: One surface has faced upwards and the other surface has faced the downward direction. A through hole is formed in the second extending portion 139b. The holding part 139c is, for example, a band-shaped member (binding band or the like) fixed to the through hole of the second extension part 139b with a screw or the like, and is wound around the outer periphery of the seventh pipe member 130g, so that the seventh pipe member Hold 130g. In addition, the form of the holding part 139c will not be limited if it is a form which can hold | maintain the pipe material 130, For example, the ring-shaped member which can insert the pipe material 130 may be sufficient.

  As shown in FIGS. 5, 6, and 7, the fuel branch adapter 131 is attached to the support bracket 120. As shown in FIG. 6, at least a part of the fuel branch adapter 131 (in the case of the present embodiment, the rear part) is disposed between the support bracket 120 and the hydraulic pump 11 in the front-rear direction. As shown in FIG. 7, the fuel branch adapter 131 is disposed between the reinforcing rib 62 and the first mount member 125 in the vertical direction. Further, the fuel branch adapter 131 is disposed at a position below the fuel filter 22, the separator 23, and the fuel pump 24 shown in FIG.

  As shown in FIG. 10, the first connecting portion 132a of the fuel branch adapter 131 protrudes from one end side of the first passage 136a toward one side (left side) in the body width direction. In other words, the first connection portion 132a protrudes from the left surface of the relay portion 133 toward the prime mover 10 side. Thereby, as shown in FIG. 6, the first pipe member 130 a connected to the first connection portion 132 a extends from the fuel branch adapter 131 toward the prime mover 10. The first pipe member 130 a extends from the fuel branch adapter 131 toward the prime mover 10, and then extends to the left through the front of the prime mover 10.

  As shown in FIG. 10, the second connecting portion 132 b is curved downwardly after projecting backward from the second passage 136 b opened in the rear surface of the relay portion 133. Thereby, as shown in FIG. 6, the second pipe member 130 b connected to the second connection portion 132 b extends downward from the fuel branch adapter 131. The second pipe member 130b extends downward from the fuel branch adapter 131, then curves forward, and extends rearward through the lower part of the prime mover 10.

  As shown in FIG. 10, the third connection portion 132 c protrudes from the other end side of the first passage 136 a opened on the right surface of the relay portion 133 toward the other side (right side) in the body width direction. Accordingly, as shown in FIG. 6, the third pipe member 130 c connected to the third connection portion 132 c extends from the fuel branch adapter 131 toward the right. The third pipe member 130c extends to the right from the fuel branch adapter 131, then extends to the front right through the front of the hydraulic pump 11, and further extends to the side room TR.

  As shown in FIG. 10, the fourth connecting portion 132 d protrudes from the fourth passage 137 b opened on the right surface of the relay portion 133 toward the other side (right side) in the body width direction. Thereby, as shown in FIG. 6, the fourth pipe member 130 d connected to the fourth connecting portion 132 d extends from the fuel branch adapter 131 toward the right. The fourth pipe member 130d extends to the right from the fuel branch adapter 131, then extends to the front right through the front of the hydraulic pump 11, and further extends to the side room TR side.

  As shown in FIG. 10, the fifth connection portion 132 e protrudes downward from one end side of the third passage 137 a that is open on the lower surface of the relay portion 133. Thereby, as shown in FIG. 6, the fifth pipe member 130 e connected to the fifth connection portion 132 e extends downward from the fuel branch adapter 131. The fifth pipe member 130 e extends downward from the fuel branch adapter 131 and then bends backward, and extends downward through the prime mover 10.

  As shown in FIG. 10, the sixth connection portion 132f protrudes upward from the other end side of the third passage 137a opened on the upper surface of the relay portion 133 and then curves toward the other side (right side) in the body width direction. ing. Thereby, as shown in FIG. 6, the sixth pipe member 130 f connected to the sixth connection part 132 f extends from the fuel branch adapter 131 toward the right side. The sixth pipe member 130f extends rightward from the fuel branch adapter 131, then passes forward of the hydraulic pump 11, extends rightward, and further extends toward the side room TR.

The seventh pipe member 130 g extends from the left side to the right side of the fuel branch adapter 131, and the midway part is held by the clamp part 139.
At least some of the plurality of pipe members 130 are routed between the prime mover 10 and the reinforcing rib 62. As shown in FIG. 6, in the case of the present embodiment, the third tube material 130 c, the fourth tube material 130 d, the sixth tube material 130 f, and the seventh tube material 130 g are routed between the prime mover 10 and the reinforcing rib 62. Yes. The third pipe member 130c, the fourth pipe member 130d, the sixth pipe member 130f, and the seventh pipe member 130g extend rightward through the front of the hydraulic pump 11.

  As shown in FIGS. 3 and 5, a holding portion 120 </ b> B <b> 1 is provided on the rear portion of the upper plate 120 </ b> B of the support bracket 120. The holding portion 120B1 is substantially U-shaped in plan view, and is fixed to the upper plate 120B by welding or the like so as to protrude rearward from the rear portion of the upper plate 120B. The holding part 120B1 can hold the tube material 130 by inserting the pipe material 130 into a space formed between the holding part 120B1 and the upper plate 120B. In the case of the present embodiment, the holding unit 120B1 holds the first tube material 130a and the seventh tube material 130g.

FIG. 11 shows a modified example of the fuel branch adapter 131. Hereinafter, the modified adapter will be described mainly with respect to a configuration different from the adapter shown in FIG.
The fuel branch adapter 131 of the modified example has a plurality of connection portions 132, a relay portion 133, and an attachment portion 138. The plurality of connecting portions 132 protrude outward from the outer surface of the relay portion 133. The plurality of connecting portions 132 include a first connecting portion 132a, a second connecting portion 132b, a third connecting portion 132c, a fourth connecting portion 132d, a fifth connecting portion 132e, a sixth connecting portion 132f, 7 connection part 132g and 8th connection part 132h are included.

  The first connecting portion 132a protrudes downward from the lower surface of the relay portion 133 and then curves toward the left (the prime mover 10 side). The 1st pipe material 130a is connected to the 1st connection part 132a. The second connecting portion 132b protrudes rearward from the rear surface of the relay portion 133 and then curves downward. The second pipe member 130b is connected to the second connection part 132b. The third connection part 132c protrudes from the right surface of the relay part 133 toward the right side (the side opposite to the prime mover 10). The third pipe member 130c is connected to the third connection part 132c. The fourth connection portion 132d protrudes from the right surface of the relay portion 133 toward the right. The fourth connection portion 132d is disposed in front of the third connection portion 132c. The fourth pipe member 130d is connected to the fourth connection part 132d. The fifth connection portion 132e protrudes downward from the lower surface of the relay portion 133.

  The fifth connection part 132e is disposed in front of the first connection part 132a. The fifth pipe member 130e is connected to the fifth connection part 132e. The sixth connection part 132f protrudes from the right surface of the relay part 133 toward the right. The sixth connection portion 132f is disposed above the fourth connection portion 132d. The sixth pipe member 130f is connected to the sixth connection portion 132f. The seventh connection portion 132g protrudes from the right surface of the relay portion 133 toward the right. The seventh connection portion 132g is disposed in front of the sixth connection portion 132f. The eighth connection portion 132h protrudes from the left surface of the relay portion 133 toward the left. The seventh pipe member 130g is connected to the seventh connection part 132g and the eighth connection part 132h. More specifically, the seventh pipe member 130g includes a prime mover side pipe member 130g1 and a fuel filter side pipe member 130g2. One end side of the prime mover side pipe member 130g1 is connected to the prime mover 10, and the other end side is connected to the eighth connection portion 132h. The fuel filter side pipe member 130g2 has one end connected to the main filter 22a and the other end connected to the seventh connecting portion 132g.

In the relay unit 133, a relay path 134 that relays between the plurality of connection units 132 is formed. The relay path 134 includes a plurality of branch paths 135 and a straight path 140. The plurality of branch paths 135 are each a branch path that allows one connection portion 132 to communicate with another plurality of connection portions 132. The straight path 140 relays the seventh connection part 132g and the eighth connection part 132h.
The plurality of branch paths 135 include a first branch path 136 and a second branch path 137. The first branch 136 is a branch formed at the rear part of the relay unit 133. The first branch path 136 is a branch path that allows the first connection portion 132a to communicate with the second connection portion 132b and the third connection portion 132c. The second branch path 137 is a branch path formed in the front part of the relay unit 133. The second branch path 137 is a branch path that allows the fourth connection portion 132d to communicate with the fifth connection portion 132e and the sixth connection portion 132f. The direct path 140 communicates the seventh connection part 132g and the eighth connection part 132h.

A straight passage 140 that connects the seventh connection portion 132g and the eighth connection portion 132h is formed in the fuel branch adapter 131 shown in FIG. 10, and the fuel filter side pipe member 130g2 is connected to the seventh connection portion 132g. The prime mover-side pipe material 130g1 may be connected to the eight connecting portion 132h.
In the present embodiment, the configuration in which the fuel branch adapter 131 includes the plurality of branch paths 135 has been described. I just need it. For example, a plurality of communication paths that communicate between the two connection parts 132 may be provided, and a communication path that communicates between the two connection parts 132 and a communication path (branch path) that communicates between the three or more connection parts 132. And may be provided.
<Belt tension adjustment device>
As illustrated in FIG. 12, the work machine 1 includes a belt tension adjusting device 151 that adjusts the tension of the belt that transmits the power from the prime mover 10 to the driven device. First, the power transmission mechanism from the prime mover 10 to which the belt tension adjusting device 151 is applied will be described with reference to FIG. FIG. 12 is a view of the prime mover 10 as viewed from the front end side (left side) of the output shaft 10A. The arrow A1 direction of FIG. 12 is the front, and the arrow A2 direction is the rear. Also, the near side in FIG. 12 is the left side, and the far side is the right side.

An output pulley (drive pulley) 10A1 is attached to the output shaft (power transmission shaft) 10A of the prime mover 10. The output pulley 10A1 has two belt grooves arranged in the axial direction of the output shaft 10A. Endless (loop-shaped) belts 150A and 150B are wound around the two belt grooves, respectively.
An input pulley 37A1 of the compressor 37 is disposed above and behind the output pulley 10A1. The rotation shaft 10A of the output pulley 10A1 and the rotation shaft 37A of the input pulley 37A1 extend in parallel to each other. A belt 150A is stretched over the output pulley 10A1 and the input pulley 37A1. The power from the output shaft 10A of the prime mover 10 is transmitted from the output pulley 10A1 to the input pulley 37A1 via the belt 150A. Thereby, the compressor 37 is driven by driving the prime mover 10.

  A fan pulley 12A1 is disposed above the output pulley 10A1. A fan 12 is connected to the fan pulley 12A1 (the fan 12 is not shown in FIG. 12). In front of the fan pulley 12A1, an input pulley (driven pulley) 38A1 of an alternator (driven device) 38 is disposed. A tension pulley 152 is disposed between the fan pulley 12A1 and the input pulley 38A1 in the front-rear direction. The rotation shaft 152A of the tension pulley 152 is disposed above the rotation shaft 12A of the fan pulley 12A1 and the rotation shaft 38A of the input pulley 38A1. The rotation shaft 152A is disposed between the rotation shaft 12A and the rotation shaft 38A in the front-rear direction. The rotation shaft 10A of the output pulley 10A1, the rotation shaft 12A of the fan pulley 12A1, the rotation shaft 38A of the input pulley 38A1, and the rotation shaft 152A of the tension pulley 152 extend in parallel with each other.

  A belt 150B is stretched over the output pulley 10A1, the fan pulley 12A1, the input pulley 38A1, and the tension pulley 152. The power from the output shaft 10A of the prime mover 10 is transmitted from the output pulley 10A1 to the fan pulley 12A1 and the input pulley 38A1 via the belt 150B. Thereby, the fan 12 and the alternator 38 are driven by driving the prime mover 10. The tension of the belt 150B can be adjusted by the belt tension adjusting device 151.

Hereinafter, the configuration of the belt tension adjusting device 151 will be described with reference to FIGS. In FIG. 13, the direction of arrow A1 is the front, the direction of arrow A2 is the rear, the direction of arrow B1 is the left, and the direction of arrow B1 is the right.
The belt tension adjusting device 151 includes a driving pulley, a driven pulley, a tension pulley 152, a belt, and an adjusting mechanism 153. The drive pulley is attached to a power transmission shaft that transmits power from the prime mover 10. In this embodiment, the power transmission shaft is the output shaft 10A, and the drive pulley is the output pulley 10A1. The driven pulley is attached to the input shaft of the driven device. In the present embodiment, the driven device is an alternator 38, the driven pulley is an input pulley 38A1, and the belt is a belt 150B. In the following description, the driving pulley 10A1, the driven pulley 38A1, and the belt 150B are described.

Hereinafter, the configuration of the adjustment mechanism 153 will be described.
As shown in FIGS. 12, 13, and 14, the adjustment mechanism 153 includes a first member 154, a second member 157, and an adjustment rod member 162. The adjustment rod member 162 is a member that can move in the axial direction by an operation such as rotation, and is a bolt in this embodiment. Hereinafter, the adjustment rod member 162 is referred to as an “adjustment bolt 162”.

The first member 154 is fixed to the upper part of the side surface of the prime mover 10 on the output shaft 10A side by a fixing member 155F. Thereby, the relative position of the first member 154 with respect to the driving pulley 10A1 and the driven pulley 38A1 is fixed.
The first member 154 is disposed above the fan pulley 12A1. The first member 154 has a first plate portion 155 and a second plate portion 156. The first plate portion 155 and the second plate portion 156 are formed by bending a single plate (such as a steel plate).

  The first plate portion 155 is disposed with one surface facing left (opposite to the prime mover 10) and the other surface facing right (prime motor 10 side). The first plate portion 155 includes first ribs 155A and 155B, a protruding portion 155C, and a locking portion 155E. The first ribs 155A and 155B protrude from one surface of the first plate portion 155 to the distal end side (left side) of the output shaft 10A and extend in the axial direction of the adjustment bolt 162 (the direction of the axial center line L1). ing. In the case of this embodiment, the first ribs 155A and 155B extend in the vertical direction. The first rib 155A is provided at a substantially intermediate position in the front-rear direction of the first plate portion 155. The first rib 155 </ b> B is formed at the rear portion of the first plate portion 155. The first rib 155A and the first rib 155B extend in parallel with a space therebetween.

  As shown in FIG. 13 and the like, the protruding portion 155C protrudes from the first plate portion 155 toward the distal end side (left side) of the output shaft 10A. The protruding portion 155C is disposed in front of the first rib 155A. Plural (two) protrusions 155C are provided. The plurality of projecting portions 155C are arranged in a straight line at intervals in the vertical direction. Specifically, the protrusions 155 </ b> C are a plurality of bolts 155 </ b> C arranged at intervals in the longitudinal direction of a later-described guide part (long hole) 161. The plurality of bolts 155 </ b> C penetrates the guide portion 161, and the tip end side projects leftward from the guide portion 161. Nuts 155D are screwed into the plurality of bolts 155C, respectively.

  As shown in FIGS. 12 to 14, the locking portion 155 </ b> E is a through hole formed in the upper portion of the first plate portion 155. The locking portion 155E is located above the output shaft 10A of the prime mover 10. The center of the through hole constituting the locking portion 155E is located between the first rib 155A and the first rib 155B in the front-rear direction. The size (diameter) of the through-hole constituting the locking portion 155E is formed such that the hook for lifting the prime mover 10 can be locked. Since the 1st board part 155 is being fixed to the motor | power_engine 10, the motor | power_engine 10 can be lifted by latching the hook for lifting to the latching | locking part 155E.

  As shown in FIGS. 12 and 14, the fixing member 155F is a fastening member such as a bolt or a rivet, and is a bolt in the present embodiment. The first plate portion 155 is fixed to the prime mover 10 by a fixing member 155F. The fixing member 155F includes at least two fixing members that are spaced apart from each other. In the present embodiment, the number of fixing members 155F is four. As shown in FIG. 13, the first plate portion 155 is formed with a fixing hole 155a through which the fixing member 155F is inserted. The fixing hole 155a penetrates the first plate portion 155 from one surface to the other surface. Since the number of the fixing holes 155a corresponds to the number of the fixing members 155F, the number is four in the present embodiment. The fixing hole 155a is formed in the lower portion of the first plate portion 155. Two of the four fixing holes 155a are formed side by side in the vertical direction between the first rib 155A and the first rib 155B. The remaining two of the four fixing holes 155a are formed side by side in the diagonal direction (the direction from the front upper part to the rear lower part) with a space behind the first rib 155B. Each fixing hole 155a has a different vertical position.

The first plate portion 155 is formed with a notch 156b that is notched downward from the upper edge. A second plate portion 156 is provided in front of the notch 156b.
As shown in FIGS. 13 and 14, the second plate portion 156 extends from the first plate portion 155 toward the distal end side (left side) of the output shaft 10 </ b> A. Specifically, the second plate portion 156 is bent from the front upper portion of the first plate portion 155 and extends leftward. As shown in FIGS. 13 and 14, the second plate portion 156 is formed with a through hole 156 a through which the adjustment bolt 162 is inserted. The through hole 156a penetrates the second plate portion 156 in the vertical direction. The through hole 156a is formed in front of the protruding portion 155C in plan view.

  The second member 157 is a member that rotatably supports the rotating shaft 152A of the tension pulley 152. The second member 157 is movable relative to the first member 154. In the case of the present embodiment, the second member 157 is movable upward or downward with respect to the first member 154. The second member 157 has a third plate portion 158, a fourth plate portion 159, and a second rib 160.

  The third plate portion 158 is disposed with one surface facing left (opposite the prime mover 10) and the other surface facing right (prime motor 10 side). The other surface of the third plate portion 158 is in contact with one surface of the first plate portion 155. When the second member 157 moves relative to the first member 154, the third plate portion 158 slides with respect to the first plate portion 155. The third plate portion 158 is formed in a substantially J shape in a side view. Specifically, as shown in FIGS. 13 and 14, the third plate portion 158 includes a rectangular first portion 158A having a length in the vertical direction that is longer than the length in the front-rear direction, and a lower portion of the first portion 158A. And a second portion 158B that bends and extends diagonally forward and downward. A rotating shaft 152A of the tension pulley 152 is disposed below the second portion 158B. As shown in FIG. 14, the axis of the rotation shaft 152 </ b> A of the tension pulley 152 is disposed on an extension line of the axis L <b> 1 of the adjustment rod member 162. In other words, the shaft center of the rotating shaft 152A is disposed on the extension of the shaft center line L1 of the adjustment bolt 162 inserted through the through hole 156a of the second plate portion 156. The direction of the axis of the adjusting rod member 162 and the direction of the axis of the rotating shaft 152A are orthogonal to each other. The rotation shaft 152A is inserted into a hole formed in the lower portion of the second portion 158B and is rotatably supported.

  The third plate portion 158 has a guide portion 161. The guide part 161 guides the movement of the second member 157 relative to the first member 154. In other words, the guide part 161 defines the moving direction of the second member 157 relative to the first member 154. In the case of this embodiment, the guide part 161 prescribes | regulates the moving direction with respect to the 1st member 154 of the 2nd member 157 to an up-down direction. The guide portion 161 is formed in the first portion 158A of the third plate portion 158. In the case of the present embodiment, the guide portion 161 is a long hole extending in the vertical direction. Hereinafter, the long hole is referred to as “long hole 161”. The long hole 161 extends parallel to the axial direction of the adjustment bolt 162 (the direction of the axial center line L1).

  The protrusion 155C of the first member 154 is inserted into the long hole 161. The protrusion 155 </ b> C moves relative to the long hole 161 with the movement of the second member 157. Specifically, the position of the protrusion 155 </ b> C is fixed, and the position of the protrusion 155 </ b> C with respect to the long hole 161 changes as the long hole 161 moves together with the second member 157. As a result, the relative position of the second member 157 with respect to the first member 154 changes as indicated by the phantom lines in FIGS. 13 and 14. The movement of the second member 157 relative to the first member 154 can be performed by operating an adjustment bolt 162 described later. Further, the relative position of the second member 157 with respect to the first member 154 (the relative position of the third plate portion 158 with respect to the first plate portion 155) can be fixed by screwing and tightening the nut 155D to the bolt 155C. .

As shown in FIG. 14, the direction L <b> 2 in which the guide portion 161 extends is shifted in parallel to the axis L <b> 1 of the adjustment bolt 162. Specifically, the guide part 161 is disposed behind the adjustment bolt 162, and the extending direction of the guide part 161 and the axial direction of the adjustment bolt 162 are parallel to each other.
As shown in FIGS. 13 and 14, the fourth plate portion 159 extends from the third plate portion 158 to the distal end side of the output shaft 10A. Specifically, the fourth plate portion 159 extends from the upper portion of the third plate portion 158 toward the left. The fourth plate portion 159 is formed with a screw hole 159a into which the adjustment bolt 162 is screwed. The screw hole 159a penetrates the fourth plate portion 159 in the vertical direction. The axial center of the screw hole 159a is arranged on the same straight line as the axial center of the through hole 156a of the second plate portion 156. Therefore, the axis of the screw hole 159a, the axis of the through hole 156a of the second plate portion 156, and the rotation shaft 152A of the tension pulley 152 are arranged on the same straight line.

  As shown in FIGS. 13 and 14, the second rib 160 is provided to protrude leftward from the front portion of the third plate portion 158 and extends in the vertical direction (parallel to the axial direction of the adjustment bolt 162). ing. The upper part of the second rib 160 is connected to the fourth plate part 159. Therefore, the second rib 160 connects the third plate portion 158 and the fourth plate portion 159. The 2nd rib 160 and the 4th board part 159 are formed in the reverse L shape by the side view as a whole. The second rib 160 is inclined so as to taper downward. The second rib 160 and the first rib 155A are opposed to each other with the guide portion 161 interposed therebetween.

  The adjustment bolt 162 is a member that moves the second member 157 relative to the first member 154. The adjustment bolt 162 is disposed above the tension pulley 152 and has an axis oriented in the vertical direction. The adjustment bolt 162 passes through the through hole 156 a of the second plate portion 156 and is screwed into the screw hole 159 a of the fourth plate portion 159. A lock nut 163 is screwed to the tip end side of the adjustment bolt 162. The lock nut 163 is in contact with the lower surface of the fourth plate portion 159.

The head of the adjustment bolt 162 is in contact with the upper surface of the second plate portion 156 and can be rotated from above. Therefore, adjustment of the belt tension by the adjusting mechanism 153 can be performed by opening the rear cover 30B and turning the head of the adjusting bolt 162 from above the prime mover room ER.
Hereinafter, a method of adjusting the belt tension by the adjusting mechanism 153 will be described.

First, the case where the tension of the belt 150B is increased (the belt is stretched) will be described.
As shown by the arrow C1 in FIG. 14, when the head of the adjustment bolt 162 is turned in the tightening direction (arrow C1 direction), the screw hole 159a moves upward with respect to the adjustment bolt 162. It moves upward and approaches the second plate portion 156. As a result, the second member 157 moves upward with respect to the first member 154. As indicated by an arrow D1 in FIG. 14, when the second member 157 moves upward, the tension pulley 152 moves upward, so that the tension applied to the belt 150B increases.

Next, a case where the tension of the belt 150B is reduced (the belt is loosened) will be described.
As shown by an arrow C2 in FIG. 14, when the head of the adjustment bolt 162 is turned in the direction of loosening (arrow C2 direction), the screw hole 159a moves downward with respect to the adjustment bolt 162. It moves downward and moves away from the second plate portion 156. As a result, the second member 157 moves downward with respect to the first member 154. As indicated by an arrow D2 in FIG. 14, when the second member 157 moves downward, the tension pulley 152 moves downward, so that the tension applied to the belt 150B decreases.

  In the above-described embodiment, the belt tension adjusting device 151 is a device that adjusts the tension of the belt 150B, but may be a device that adjusts the tension of the belt 150A. In this case, the compressor 37 becomes a driven device, and the input pulley 37A1 becomes a driven pulley. Further, the belt 150B may be configured such that the belt 150B is wound around the output pulley 10A1, the tension pulley 152, and the input pulley 37A1, and the tension pulley 152 can be moved by the adjusting mechanism 153.

The drive pulley may be a pulley attached to a power transmission shaft (for example, another shaft that rotates by receiving the rotational power of the output shaft 10A) different from the output shaft 10A of the prime mover 10. In this case, the drive pulley is a pulley attached to a power transmission shaft different from the output shaft 10A.
The belt tension adjusting device 151 can also be applied to a belt that transmits the power of the prime mover 10 to driven devices (for example, a hydraulic pump or the like) other than the compressor 37 and the alternator 38. In other words, the belt tension adjusting device 151 can be widely applied to a belt wound around a pulley of a driven device that receives and drives the power of the prime mover 10 by belt transmission.
<Fan cover>
As shown in FIGS. 1, 2, 15, and 16, the work machine 1 includes a blower 16 that includes a fan 12, a fan shroud 13, and a fan cover 170. The fan cover 170 is attached to the fan shroud 13 surrounding the fan 12. The fan cover 170 is a cover for preventing an operator from contacting the rotating fan 12.

The fan cover 170 and the configuration around the fan cover 170 will be described below mainly with reference to FIGS. 15 to 19, the direction of arrow A1 is the front, the direction of arrow A2 is the rear, the direction of arrow B1 is the left, and the direction of arrow B1 is the right.
As shown in FIG. 2, the fan shroud 13 is disposed between the prime mover 10 and the radiator 14, and adjusts the air flow (airflow from the radiator 14 side toward the prime mover 10 side) generated by the rotation of the fan 12.

  As shown in FIGS. 16, 17, etc., the fan shroud 13 has a wall body 13A and a cylinder 13B. The wall body 13A includes a first wall portion 13A1, a peripheral wall portion 13A2, and a second wall portion 13A3. The first wall portion 13A1 is plate-shaped and has one surface facing left and the other surface facing right. The first wall portion 13A1 is formed with a rectangular opening, and a rectangular frame-shaped peripheral wall portion 13A2 is provided along the edge of the opening. The peripheral wall portion 13A2 protrudes rightward from the first wall portion 13A1. The second wall portion 13A3 extends inward from the right end of the peripheral wall portion 13A2. The second wall portion 13A3 has a plate shape and is formed with a circular opening hole. The cylinder 13B protrudes rightward from the edge of the opening hole of the second wall portion 13A3. A fan 12 is housed inside the cylinder 13B.

  The fan shroud 13 is made of resin, and the wall body 13A and the cylinder 13B are integrally formed. A nut 13 a is embedded in the fan shroud 13. Specifically, as shown in FIG. 15, the nut 13a is embedded in the second wall portion 13A3 by insert molding. Specifically, as shown in FIG. 16, the nut 13a is embedded in a convex portion 13A4 projecting rightward from the right surface of the second wall portion 13A3. The convex portion 13A4 is integrally formed with the second wall portion 13A3. The nut 13a is arranged so that the center axis direction of the screw hole faces the body width direction.

  As shown in FIGS. 16 and 17, the fan cover 170 is arranged in the radially outward direction (in the direction of arrow E <b> 1 in FIG. 16) of the output shaft 10 </ b> A of the prime mover 10, specifically, around the fan 12. ing. The fan cover 170 covers a part of a region between the prime mover 10 and the fan shroud 13 in the axial direction of the output shaft 10A (the direction of arrow E2 in FIG. 15). In the case of the present embodiment, the width direction E2 of the output shaft 10A coincides with the body width direction K2 (see FIG. 28). In the following description, the space S around the fan 12 shown in FIGS. 15 and 16 and the space S between the prime mover 10 and the fan shroud 13 in the axial direction of the output shaft 10A is referred to as “cover space. S ".

  As shown in FIG. 16, the fan cover 170 is disposed on the upper rear side of the output shaft 10 </ b> A, and is inclined so as to go downward from the upper side of the fan 12 to the rear side. In other words, the fan cover 170 is inclined downwardly toward the direction away from the virtual straight line L3 extending in the vertical direction through the output shaft 10A. Hereinafter, the direction of inclination of the fan cover 170 (indicated by an arrow E3 in FIG. 16) is referred to as “inclination direction E3”.

  The fan cover 170 is attached to the right side (the prime mover 10 side) of the fan shroud 13. Specifically, the fan cover 170 is attached to the rear upper part of the right surface of the second wall portion 13A3 of the fan shroud 13, and extends from the rear upper part to the right (motor 10 side). Thereby, the fan cover 170 covers the rear upper part of the cover space S (the rear upper part of the output shaft 10A).

The fan cover 170 is made of metal, and is formed of, for example, a steel plate. As shown in FIGS. 15 to 18, the fan cover 170 includes a first cover member 171 and a second cover member 175 attached to the first cover member 171. The first cover member 171 and the second cover member 175 are each formed by bending a metal plate.
The first cover member 171 is attached to the fan shroud 13. As shown in FIG. 18 and the like, the first cover member 171 has a mounting portion 172 and an extending portion 173. The attachment portion 172 is a portion attached to the fan shroud 13 and has a plurality of attachment holes 172a. The attachment portion 172 has a substantially triangular shape in a side view, and a hole 172a is formed in the vicinity of each vertex of the triangle. As shown in FIG. 17, the mounting portion 172 is attached to the fan shroud 13 by inserting bolts 172 b into the holes 172 a and screwing the bolts 172 b into nuts 13 a embedded in the fan shroud 13.

  As shown in FIGS. 17 and 18, the extending portion 173 extends from the lower end portion of the mounting portion 172 toward the right side (the prime mover 10 side). The extending portion 173 extends rearward from above the fan 12. Specifically, the extending portion 173 is plate-shaped, and is disposed so as to be inclined from the upper side to the rear side of the fan 12, whereby one surface faces the rear upper side and the other surface faces the front lower side. ing. The extending portion 173 has one end portion in the inclined direction E <b> 3 disposed above the fan 12 and the other end portion disposed behind the fan 12. Specifically, as shown in FIG. 16, the extending portion 173 has one end portion in the inclined direction E3 disposed on the side close to the virtual straight line L3 and the other end portion disposed on the side far from the virtual straight line L3.

  As shown in FIG. 18, the extending portion 173 has a notch 173a. The notch 173a is formed by notching one end side (upper side) and the prime mover 10 side (right side) of the extending part 173. In other words, the extending portion 173 has a side piece 173A that forms the right end of the notch 173a and a lower piece 173B that forms the lower end of the notch 173a. The extending portion 173 has a substantially L shape when viewed from a direction orthogonal to the extending portion 173 by the side piece 173A and the lower piece 173B. That is, the notch 173a is rectangular. Holes 173b through which bolts 173c are inserted are formed in the upper part of the side piece 173A and the upper right part of the lower piece 173B, respectively.

  As shown in FIGS. 17 and 18, the first cover member 171 has a lower plate portion 174. The lower plate portion 174 is bent from the other end portion (rear end portion) of the extending portion 173 and extends downward. The lower plate portion 174 is provided with a holding portion 174A that holds the pipe material 174B. The holding portion 174A has a substantially U shape in plan view, and is fixed to the lower plate portion 174 by welding or the like. As shown in FIG. 17, the tube material 174B can be held in the holding portion 174A by inserting the tube material 174B into an internal space formed between the holding portion 174A and the rear surface of the lower plate portion 174. The pipe material 174B held by the holding part 174A can be placed on the upper surface of the fan cover 170 and arranged. Therefore, it is possible to arrange the pipe material 174B stably while preventing contact with the fan 12. In the case of this embodiment, the pipe material 174B held by the holding portion 174A is a drain pipe material for engine cooling water.

The second cover member 175 is detachably attached to the first cover member 171. Specifically, the second cover member 175 is detachably attached to the extending portion 173 of the first cover member 171 and covers the notch portion 173a of the first cover member 171.
As shown in FIG. 18, the second cover member 175 has a cover plate portion 176 and a front plate portion 177. The cover plate part 176 is attached to the extended part 173 and covers the notch part 173a. The cover plate portion 176 has a rectangular shape, and the width (length in the body width direction) is shorter than the length (length in the tilt direction E3). The horizontal width of the cover plate portion 176 is larger than the horizontal width of the cutout portion 173a, and the vertical width of the cover plate portion 176 is larger than the vertical width of the cutout portion 173a. Thereby, as shown in FIG. 15, the cover board part 176 can cover the whole notch part 173a.

  As shown in FIG. 18, the cover plate portion 176 is formed with a hole 176a into which the bolt 173c is inserted. The holes 176a are formed in the upper left part and the lower right part of the cover plate part 176, respectively. The second cover member 175 is attached to the first cover member 171 by inserting the bolt 173c through the hole 176a of the second cover member 175 and the hole 173b of the first cover member 171 and screwing the nut 173d into the bolt 173c. It is done. Further, the second cover member 175 can be removed from the first cover member 171 by releasing the screwing of the bolt 173c and the nut 173d.

  As shown in FIG. 16, the front plate portion 177 is bent from the upper portion of the cover plate portion 176 and extends to the side (front) near the virtual straight line L3. The front plate portion 177 is disposed at the upper end of the fan cover 170 in a state where the second cover member 175 is attached to the first cover member 171 and is located above the upper end of the fan 12. Further, the front plate portion 177 can support the pipe member 174B held by the holding portion 174A from below.

  As shown in FIG. 15, the fan cover 170 covers the rear upper side of the cover space S in a state where the second cover member 175 is attached to the first cover member 171. The first cover member 171 and the second cover member 175 divide and cover the upper rear area of the cover space S. Specifically, in the upper rear area of the cover space S, the first cover member 171 covers the rear part, and the second cover member 175 covers the front part. The area of the region covered by the second cover member 175 is larger than the area of the region covered by the first cover member 171.

  Since the rear upper part of the cover space S is covered by the fan cover 170, access from the rear and upper sides to the fan 12 is restricted, so that the operator can be prevented from contacting the rotating fan 12. As shown in FIG. 19, during maintenance, the operator can access the fan 12 and the fan shroud 13 from the notch 173 a by removing the second cover member 175 from the first cover member 171. At this time, the first cover member 171 does not need to be removed from the fan shroud 13. Even if the second cover member 175 is removed from the first cover member 171, the first cover member 171 holds the pipe member 174 </ b> B with the holding portion 174 </ b> B while covering the part of the cover space S behind the lower piece 173 </ b> B. Therefore, it is possible to prevent the tube material 174B from contacting the fan 12.

  As shown in FIGS. 15 and 18, the belt tension adjusting device 151 is disposed in front of the fan cover 170 (front right). Therefore, by removing the second cover member 175 from the first cover member 171, the operator can easily access the adjustment bolt 162 of the belt tension adjusting device 151 from the notch 173a and adjust the tension of the belt 150B. It becomes possible.

In the present embodiment, the fan cover 170 is arranged at a position covering the rear upper side. However, the arrangement (position and orientation) of the fan cover 170 may be changed according to the arrangement (position and orientation) of the fan 13. it can. In short, the arrangement of the fan cover 170 may be a position that covers the cover space S from a direction different from the rear upper direction as long as access to the fan 13 can be restricted.
<DPF muffler cover (first cover), turbocharger cover (second cover), tail muffler>
<DPF muffler>
As shown in FIG. 20, FIG. 28, etc., a particle removing device (exhaust treatment device) 18 is provided in the prime mover room ER. The particle removing device 18 processes fine particles containing harmful substances in the exhaust (exhaust gas) from the prime mover 10. The particle removing device 18 includes an exhaust processing unit 18A, a bracket 184, and a first cover 185. In the present embodiment, the exhaust processing unit 18A is configured by a DPF (Diesel Particulate Filter) muffler. The exhaust processing unit 18 </ b> A processes fine particles contained in the exhaust discharged from the prime mover 10. Specifically, the exhaust processing unit 18A captures and burns particulates contained in the exhaust discharged from the prime mover 10. The exhaust processing unit 18A is not limited to the DPF muffler, and may be any unit that processes fine particles contained in the exhaust discharged from the prime mover 10.

As shown in FIGS. 1 and 20, the DPF muffler 18 </ b> A is provided above the right portion of the prime mover 10 and above the hydraulic pump 11. In FIG. 20, the arrow A1 direction is the front, the arrow A2 direction is the rear, the arrow B1 direction is the left, and the arrow B1 is the right.
As shown in FIGS. 20 and 23, the DPF muffler 18A has a substantially cylindrical outer shape, and is arranged with the central axis direction of the cylinder directed in the front-rear direction. The DPF muffler 18 </ b> A has a plurality of exterior members 181. The plurality of exterior members 181 are connected to each other via a connecting portion 182. The plurality of exterior members 181 include a front exterior member 181a, a trunk exterior member 181b, and a rear exterior member 181c. The front exterior member 181a is an exterior member located at the front portion of the DPF muffler 18A. The front exterior member 181a has a front wall 181a1 and a peripheral wall 181a2 extending rearward from the outer periphery of the front wall 181a1. That is, the front exterior member 181a has a cylindrical shape and opens rearward. A flange portion (first flange portion) 181a3 is provided at the rear end portion of the front exterior member 181a so as to protrude outward in the diameter of the DPF muffler 18A.

  As shown in FIGS. 20 and 23, the trunk exterior member 181b is an exterior member located in the middle in the front-rear direction of the DPF muffler 18A. The trunk | drum exterior member 181b is a cylindrical member by which the front and back were open | released. Flange portions 181b1 and 181b2 are provided at the front end portion and the rear end portion of the body exterior member 181b, respectively, projecting outward from the diameter of the DPF muffler 18A. The flange portions 181b1 and 181b2 include a second flange portion 181b1 and a third flange portion 181b2. Specifically, the second flange portion 181b1 protrudes outward from the diameter of the DPF muffler 18A at the front end portion of the body exterior member 181b. The third flange portion 181b2 protrudes outward from the diameter of the DPF muffler 18A at the rear end portion of the body exterior member 181b.

  As shown in FIGS. 20 and 23, the rear exterior member 181c is an exterior member located at the rear portion of the DPF muffler 18A. The rear exterior member 181c has a rear wall 181c1 and a peripheral wall 181c2 protruding forward from the outer periphery of the rear wall 181c1. That is, the rear exterior member 181c is cylindrical and opens toward the front. A flange portion (fourth flange portion) 181c3 is provided at the rear end portion of the rear exterior member 181c so as to protrude outward in the diameter of the DPF muffler 18A.

  The first flange portion 181a3 provided on the front exterior member 181a and the second flange portion 181b1 provided on the front end portion of the body exterior member 181b are in contact with each other. The fourth flange portion 181c3 provided on the rear exterior member 181c and the third flange portion 181b2 provided on the rear end portion of the body exterior member 181b are in contact with each other. The connecting part 182 includes a first connecting part 182A and a second connecting part 182B. The first connecting portion 182A connects the first flange portion 181a3 and the second flange portion 181b1 that are in contact with each other. The second connecting portion 182B connects the fourth flange portion 181c3 and the third flange portion 181b2 that are in contact with each other.

  As shown in FIG. 20, the first connecting portion 182A is composed of two semicircular arc members 182a having grooves formed on the inner peripheral surface. As shown in the sectional view of FIG. 23, the two semicircular arc members 182a constituting the first connecting portion 182A are annular so that the first flange portion 181a3 and the second flange portion 181b1 are fitted into the groove. To be combined. In a state where two semicircular arc-shaped members 182a are combined, a bolt (fastening member) 182a1 is inserted into the first connecting portion 182A, the first flange portion 181a3, and the second flange portion 181b1, and the nut 182a2 is screwed. The front exterior member 181a and the body exterior member 181b are connected. A through hole 182c different from the insertion hole of the bolt 182a1 is formed in the first connecting portion 182A. The through hole 182c penetrates the plate-like portion protruding from the upper part of the semicircular arc member 182a in the front-rear direction.

  As shown in FIG. 20, the second connecting portion 182B is composed of two semicircular arc-shaped members 182b having grooves formed on the inner peripheral surface. As shown in the cross-sectional view of FIG. 23, the two semicircular arc members 182b constituting the second connecting portion 182B have an annular shape so that the fourth flange portion 181c3 and the third flange portion 181b2 are fitted into the groove. To be combined. In a state where two semicircular arc members 182b are combined, a bolt (fastening member) 182b1 is inserted into the second connecting portion 182B, the fourth flange portion 181c3, and the third flange portion 181b2, and the nut 182b2 is screwed. The rear exterior member 181c and the trunk exterior member 181b are connected. A through hole 182d different from the insertion hole for the bolt 182b1 is formed in the second connecting portion 182B. The through hole 182d penetrates the plate-like portion protruding from the upper part of the semicircular arc member 182b in the front-rear direction.

  As shown in FIG. 20, the intake port 18a of the DPF muffler 18A is formed to project in a cylindrical shape from the peripheral wall 181c2 of the rear exterior member 181c. The intake port 18a opens to the left, and is connected to the exhaust manifold of the prime mover 10. The exhaust port 18b of the DPF muffler 18A is formed so as to protrude in a cylindrical shape from the peripheral wall 181a2 of the front exterior member 181a. As shown in FIGS. 20, 23, etc., the exhaust port 18 b opens in the upper right direction and is connected to one end of the exhaust pipe 183.

As shown in FIGS. 2 and 20, the exhaust pipe 183 extends obliquely upward and to the right, and the other end of the exhaust pipe 183 opens obliquely upward and to the right. One end of a tail muffler 188 is connected to the other end of the exhaust pipe 183. The inner diameter of one end of the tail muffler 188 is larger than the outer diameter of the other end of the exhaust pipe 183, and one end of the tail muffler 188 is fitted to the other end of the exhaust pipe 183 from the outside.
<First cover>
As shown in FIG. 20, a first cover 185 is attached to the DPF muffler 18 </ b> A via a bracket 184. In FIG. 20, the first cover 185 is indicated by phantom lines, and the external appearance of the first cover 185 attached is shown in FIG.

  The bracket 184 is attached to the DPF muffler 18A via a connecting portion 182 formed on the exterior member 181. As shown in FIG. 23, the bracket 184 is attached across a plurality of (two in this embodiment) connecting portions 182 formed on the exterior member 181, that is, the connecting portions 182 adjacent in the front-rear direction. ing. As shown in FIG. 21, the bracket 184 includes an upper plate 184 </ b> A and a main body side attachment portion 190. The upper plate 184A is a plate to which the first cover 185 is attached, and has a substantially triangular shape in plan view. A plurality of through holes 184A2 through which the bolts 184A1 are inserted are formed in the upper plate 184A. The portion of the upper plate 184A where the through hole 184A2 is formed is a portion (cover attachment portion) to which the first cover 185 is attached. The through hole 184A2 is a hole for attaching the first cover 185 via the bolt 184A1. The plurality of through holes 184A2 are formed near the apexes of the triangle that is the shape of the upper plate 184A. An opening 184A3 is formed in the center of the upper plate 184A. In the present embodiment, the shape of the upper plate 184A in plan view is a substantially triangular shape, but is not limited thereto, and may be another shape such as a substantially rectangular shape. Further, the opening 184A3 may not be formed.

  The main body side attaching portion 190 is a portion attached to the DPF muffler 18A. The main body side attaching portion 190 includes a first connected portion 184B and a second connected portion 184C. The first connected portion 184B protrudes downward from the front end portion of the upper plate 184A. A through hole 184B1 is formed in the first connected portion 184B. The second connected portion 184C protrudes downward from the rear end portion of the upper plate 184A. A through hole 184C1 is formed in the second connected portion 184C. As shown in FIG. 23, a through-hole 184B1 formed in the first connected portion 184B and a through-hole 182c formed in the first connecting portion 182A are overlapped and a bolt 184b is inserted, and a nut is screwed into the bolt 184b. Match. Accordingly, the first connected portion 184B is connected to the first connecting portion 182A. Further, the through-hole 184C1 formed in the second connected portion 184C and the through-hole 182d formed in the second connecting portion 182B are overlapped, the bolt 184c is inserted, and a nut is screwed into the bolt 184c. Accordingly, the second connected portion 184C is connected to the second connecting portion 182B. Thereby, the bracket 184 is attached to the upper part of the DPF muffler 18A. One surface of the upper plate 184A of the bracket 184 is a surface facing upward when attached to the DPF muffler 18A.

The first cover 185 is a separate body from the bracket 184 and is attached to the bracket 184 and covers at least a part of the DPF muffler 18A. As shown in FIGS. 21, 22, etc., the first cover 185 has a first cover plate 185A, a second cover plate 185B, and a third cover plate 185C. As can be seen from FIGS. 1 and 20, the first cover plate 185A covers the upper portion of the DPF muffler 18A. The second cover plate 185B covers the side (back of the machine body) of the DPF muffler 18A. The third cover plate 185C covers the side (airframe side) of the DPF muffler 18A. Specifically, the third cover plate 185C covers the right side of the DPF muffler 18A.
That is, the first cover 185 covers the DPF muffler 18A from a plurality of directions. Specifically, the first cover 185 covers the DPF muffler 18A from three directions (upward, rearward, and rightward).

The first cover plate 185A is rectangular and has a plurality of through holes 185A1 through which the bolts 184A1 are inserted. The first cover plate 185A is arranged so that one surface (outer surface) faces upward and the other surface (inner surface) faces downward. The inner surface is the surface facing the DPF muffler 18A, and the outer surface is the surface opposite to the DPF muffler 18A.
The second cover plate 185B extends downward from the rear end portion of the first cover plate 185A. The second cover plate 185B is arranged so that one surface (outer surface) faces rearward and the other surface (inner surface) faces forward. As shown in FIG. 21, a bolt 184A1 is inserted into a through hole 185A1 formed in the first cover plate 185A and a through hole 184A2 formed in the upper plate 184A of the bracket 184, and a nut is screwed into the bolt 184A1. Thus, the first cover plate 185A is attached to the bracket 184.

  The third cover plate 185C connects the first cover plate 185A and the second cover plate 185B. Specifically, as shown in FIGS. 21, 22, etc., the third cover plate 185C connects the right end of the first cover plate 185A and the right end of the second cover plate 185B. The third cover plate 185C is disposed so that one surface (outer surface) faces right and the other surface (inner surface) faces left. A through hole 185C1 through which the bolt 185C2 is inserted is formed in the third cover plate 185C. As shown in FIG. 20, a bolt 185C2 is inserted into the through hole 185C1, and the bolt 185C2 is screwed into a screw hole 182e formed in the connecting portion 182 of the DPF muffler 18A, so that the third cover plate 185C becomes a DPF muffler. It is fixed to 18A.

In addition, a through hole 185C3 is formed in the third cover plate 185C. A bolt 180A for fixing the mounting table 180 on which the DPF muffler 18A is mounted and the DPF muffler 18A is inserted into the through hole 185C3. The third cover plate 185C and the mounting table 180 are fixed to the DPF muffler 18A by fastening with the bolt 180A.
As shown in FIGS. 21 and 22, the first cover 185 has an extending rib 185 </ b> D on the inner surface. The extending rib 185D extends from the first cover plate 185A to the second cover plate 185B. Specifically, the extending rib 185D extends from the left front end portion of the inner surface (lower surface) of the first cover plate 185A to the left lower end portion of the inner surface (front surface) of the second cover plate 185C. The extending rib 185D has an L-shaped plate shape in a side view, and one surface thereof is disposed to face the third cover plate 185C.

  The extending rib 185D extends from the first cover plate 185A, which is a plate fixed to the DPF muffler 18A, to the second cover plate 185B, which is a plate not fixed to the DPF muffler 18A. Therefore, the vibration of the second cover plate 185B that is a plate that is not fixed to the DPF muffler 18A can be suppressed. The extending rib 185D may extend from the third cover plate 185C to the second cover plate 185B. Also in this case, since the third cover plate 185C is fixed to the DPF muffler 18A, vibration of the second cover plate 185B can be suppressed.

In the present embodiment, the first cover plate 185A is attached to the DPF muffler 18A via the bracket 184, and the third cover plate 185C is directly attached to the DPF muffler 18A, but the third cover plate 185C is attached via the bracket. The first cover plate 185A may be directly attached to the DPF muffler 18A.
<Second cover>
As shown in FIGS. 20, 28, etc., a supercharger 186 is disposed above the rear part of the prime mover 10. The supercharger 186 supplies the compressed air to the prime mover 10 by rotating an internal turbine by exhaust discharged from the prime mover 10.

As shown in FIGS. 1, 2, and 20, the work machine 1 includes a second cover 187. The second cover 187 is attached to the structure 91 of the turning substrate 8 and covers at least a part of the supercharger 186. Specifically, the second cover 187 is attached to the rear leg portion 94 and covers the upper side and the rear side of the supercharger 186.
As shown in FIGS. 20 and 24, the second cover 187 includes a covering wall portion 187A and a mounted portion 187B. The covering wall portion 187A includes a first covering wall 187A1, a second covering wall 187A3, and a connecting wall 187A2. The first covering wall 187A1 is disposed above the supercharger 186 and covers the upper portion of the supercharger 186. The second covering wall 187A3 is disposed behind the supercharger 186 and covers the rear of the supercharger 186. The connecting wall 187A2 connects the first covering wall 187A1 and the second covering wall 187A3. The connecting wall 187A2 is curved in an arc shape, and connects the rear end portion of the first covering wall 187A1 and the upper end portion of the second covering wall 187A3.

  The attached portion 187B protrudes rearward from the left portion of the second covering wall 187A3. A hole 187B1 penetrating in the vertical direction is formed in the attached portion 187B. As shown in FIGS. 20 and 24, the attached portion 187 </ b> B is attached to an attachment portion 94 </ b> B connected to the rear end portion of the rear leg portion 94. The attachment portion 94B is connected to a vertical portion (a portion extending upward from the rear support member 67) of the rear leg portion 94.

The attached portion 187B is formed by inserting a bolt 187B2 through a hole 187B1 formed in the attached portion 187B and a hole formed in the attaching portion 94B, and screwing a nut 187B3 into the bolt 187B2. It is fixed to 94B. As a result, the second cover 187 is attached to the rear leg portion 94 of the structure 91.
In the present embodiment, the second cover 187 covers the upper and rear of the supercharger 186, but the second cover 187 may cover only the rear of the supercharger 186, or the supercharger The front, upper, and rear of 186 may be covered.
<Tail muffler>
As shown in FIGS. 2 and 20, an exhaust pipe 183 connected to the exhaust port 18 b of the DPF muffler 18 </ b> A is inserted on one end side of the tail muffler 188. As shown in FIGS. 1 and 2, the tail muffler 188 has a first curved portion 188A and a second curved portion 188B. The first bent portion 188A extends obliquely from the other end of the exhaust pipe 183 to the upper right and then curves and extends upward. The second bending portion 188B extends upward continuously from the first bending portion 188A and then curves to the right. The other end (exhaust port 18b) of the tail muffler 188 protrudes obliquely upward and to the right from the cover 30.

As shown in FIG. 25, the tail muffler 188 extends obliquely upward and to the right through the space between the second front member 99A and the second rear member 99B of the second support 99. As shown in FIGS. 1, 2, 4, 5, and the like, the tail muffler 188 passes through the upper cover 30 </ b> A disposed above the first support body 98 and the second support body 99.
As shown in FIGS. 25 and 26, the upper cover 30A is a substantially rectangular plate member, and covers the second front member 99A, the second rear member 99B, and the first rear member 98B. The upper cover 30A is fixed to the first support body 98 and the second support body 99 via fastening members (bolts or the like). An opening hole 30A1 is formed in the right part of the upper cover 30A. The opening hole 30A1 is located between the second front member 99A and the second rear member 99B. The opening hole 30A1 is a substantially oval (elliptical) oval hole that is long in the body width direction. The tail muffler 188 passes through the opening hole 30A1 upward, curves to the right, and opens to the right.

  The exhaust from the prime mover 10 passes through the supercharger 186, and after the particulates are removed through the DPF muffler 18 </ b> A, the exhaust is discharged from the exhaust pipe 183 through the tail muffler 188 to the outside of the airframe 2. The exhaust from the tail muffler 188 is discharged toward the right because the tail muffler 188 is open toward the right. As a result, the exhaust from the tail muffler 188 is directed to the side opposite to the cabin 3 mounted on the left side of the fuselage 2. Further, since the tail muffler 188 protrudes from the right part of the upper cover 30A, it is located away from the cabin 3. Therefore, it is possible to avoid the exhaust discharged from the tail muffler 188 from flowing into the cabin 3 and flowing into the cabin 3. Therefore, it is possible to prevent the operator sitting in the driver's seat 6 in the cabin 3 from sucking the exhausted exhaust.

Further, since the fan 12 sucks outside air from the left side of the airframe 2, the exhaust from the tail muffler 188 is discharged in the direction opposite to the suction side of the fan 12. Therefore, it is possible to prevent the exhaust discharged from the tail muffler 188 from being taken into the prime mover room ER by the fan 12.
<Effect>
The work machine 1 of the present embodiment has the following effects.
<Adapter (fuel branch adapter)>
The fuel branch adapter 131 is a fuel branch adapter provided in the working machine 1 having the body 2, the prime mover 10 mounted on the body 2 and driven by fuel, and the plurality of pipes 130 through which the fuel flows. A plurality of connecting portions 132 connected to each other, a relay portion 133 in which a plurality of communication passages (branch paths) 135 communicating between the plurality of connecting portions 132 are formed, and an attaching portion 138 attached to the body 2. Have.

  According to this configuration, a plurality of communication passages 135 can be integrated into one fuel branch adapter 131 attached to the airframe 2, and a plurality of pipe members 130 through which fuel can be circulated can be connected to the fuel branch adapter 131. Therefore, it is possible to facilitate the arrangement of the pipe material through which the fuel is circulated. In addition, since the fuel branch adapter 131 is attached to the airframe 2, the positions and paths of the plurality of pipes 130 can be fixed, so that the pipes can be prevented from coming into contact with equipment (prime motor, hydraulic pump, etc.) Vibration and wear can be prevented. In addition, since the attachment portion 138 can be attached to or detached from the airframe 2 with a plurality of pipes 130 connected to the fuel branch adapter 131, it is possible to facilitate the assembly work of the pipes and the like during production and maintenance. it can.

Each of the plurality of communication paths 135 is a branch path that allows one connection portion 132 to communicate with another plurality of connection portions 132.
According to this configuration, a plurality of branch paths 135 are formed in one fuel branch adapter 131 for communicating the pipe material connected to one connection portion 132 with the pipe material connected to the other plurality of connection portions 132. A plurality of pipes communicated with the respective branch paths 135 can be aggregated and connected to one fuel branch adapter 131, so that pipe arrangement can be facilitated.

Further, the plurality of pipes 130 include air vent pipes for removing air contained in the fuel.
According to this configuration, it is possible to prevent the air vent pipe from coming into contact with equipment (such as a prime mover and a hydraulic pump), and to prevent vibration and wear of the air vent pipe. In addition, the work of assembling the air vent pipe during production or maintenance can be facilitated.

Further, the fuel branch adapter 131 has a clamp part 139 that holds a pipe material different from the pipe material connected to the connection part 132.
According to this configuration, separately from the pipe material connected to the connection portion 132, the pipe material routed through the vicinity of the fuel branch adapter 131 can be held and positioned by the clamp 139 of the fuel branch adapter 131. it can. Therefore, it is possible to route the pipe material while avoiding that the pipe material connected to the connecting portion 132 and the pipe material routed through the vicinity of the fuel branch adapter 131 are entangled.

  The plurality of branch paths 135 include a first branch path 136 and a second branch path 137, and the plurality of connection sections 132 include a first connection section 132a, a second connection section 132b, and a third connection section 132c. A fourth connection part 132d, a fifth connection part 132e, and a sixth connection part 132f. The first branch path 136 is a branch path that allows the first connection portion 132a to communicate with the second connection portion 132b and the third connection portion 132c. The second branch path 137 is a branch path that allows the fourth connection portion 132d to communicate with the fifth connection portion 132e and the sixth connection portion 132f.

  According to this configuration, the three connection parts (the first connection part 132a, the second connection part 132, and the third connection part 132c) communicated with each other by the first branch path 136 and the second branch path 137 communicate with each other. The three connection parts (the fourth connection part 132d, the fifth connection part 132e, and the sixth connection part 132f) can be integrated into one fuel branch adapter 131. Therefore, the path and position of the pipe material connected to the three connection parts communicated with each other by the first branch path 136 and the pipe material connected to the three connection parts communicated to each other by the second branch path 137 are fixed. Can be easily arranged.

  The first branch 136 is a T-shaped branch including a first passage 136a extending in the width direction of the body 2 and a second passage 136b extending from the middle of the first passage 136a and extending rearward. The second branch path 137 includes a third path 137a that extends in the vertical direction and a fourth path 137b that branches from a middle portion of the third path 137a and extends to one side in the body width direction. It is a branched branch.

According to this configuration, the plurality of pipe members 130 connected to the fuel branch adapter 131 can be easily arranged in the body width direction, the vertical direction, and the rear.
The first connecting portion 132a protrudes from one end side of the first passage 136a toward the prime mover 10 disposed on one side in the body width direction. The second connecting portion 132b protrudes rearward from the second passage 136b and then curves downward, and the third connecting portion 132c protrudes from the other end side of the first passage 136a toward the other side in the body width direction. ing. The fourth connection portion 132d protrudes from the fourth passage 137b toward the other side in the body width direction, and the fifth connection portion 132e protrudes downward from one end side of the third passage 137a. The sixth connecting portion 132f protrudes upward from the other end side of the third passage 137a and then curves toward the other side in the body width direction.

  According to this configuration, the pipe material 130a connected to the first connection portion 132a can be routed toward the prime mover 10 side. The pipe material 130b connected to the second connection portion 132b and the pipe material 130e connected to the fifth connection portion 132e can be routed toward the lower side of the fuel branch adapter 131. Arranging the pipe material 130 connected to the third connection part 132c, the pipe material 130 connected to the fourth connection part 132d, and the pipe material 130 connected to the sixth connection part 132f on the side opposite to the prime mover 10. Can do.

The work machine 1 includes the fuel branch adapter 131.
According to this configuration, it is possible to realize the working machine 1 that exhibits the excellent effects of the fuel branch adapter 131 described above.
The work machine 1 also returns a fuel tank 19 for storing fuel, a fuel supply path 25a for supplying the fuel stored in the fuel tank 19 to the prime mover 10, and a fuel discharged from the prime mover 10 to the fuel supply path 25a. A valve (reflux valve) 84 provided in the reflux path 25b, a fuel cooler 15 that cools the fuel, and a fuel filter 22 that removes foreign matters in the fuel supplied from the fuel pump 24 to the prime mover 10 are provided. . The plurality of pipes 130 include a first pipe 130a that connects the prime mover 10 and the first connection part 132a, a second pipe 130b that connects the second connection part 132b and the fuel cooler 15, a third connection part 132c, and a valve. 84, and the plurality of pipes 130 include a fourth pipe 130d that connects the fuel filter 22 and the fourth connection part 132d, a fuel cooler 15, and a fifth connection part 132e. A fifth pipe member 130e to be connected and a sixth pipe member 130f to connect the sixth connecting part 132f and the fuel tank 19 are included.

According to this configuration, it is possible to facilitate the arrangement of a plurality of tubes constituting the fuel circuit, prevent the vibration and wear of the tubes, and facilitate the assembly work of the tubes and the like during production and maintenance. .
The airframe 2 includes a substrate 8 and a support bracket 120 provided on the substrate 8 and supporting the prime mover 10, and the attachment portion 138 is attached to the support bracket 120.

According to this configuration, the fuel branch adapter 131 to which the plurality of pipes 130 are connected can be positioned and disposed in the vicinity of the prime mover 10. Thereby, the arrangement | positioning of the some pipe material connected to the motor | power_engine 10 or the peripheral apparatus (hydraulic pump etc.) of a motor | power_engine can be performed easily.
In addition, the work machine 1 includes a hydraulic actuator and a hydraulic pump 11 that discharges hydraulic oil supplied to the hydraulic actuator. The support bracket 120 supports the front portion of the prime mover 10, and at least a part of the fuel branch adapter 131 is disposed between the support bracket 120 and the fuel pump 24 in the front-rear direction.

According to this configuration, all or part of the plurality of pipe members 130 connected to the fuel branch adapter 131 can be easily routed between the support bracket 120 and the hydraulic pump 11.
The fuselage 2 has reinforcing ribs 62 that are provided on the top of the substrate 8 and extend in the front-rear direction. A mount member 125 is interposed between the support bracket 120 and the prime mover 10, and the fuel branch adapter 131 is It is arranged between the reinforcing rib 62 and the mount member 125 in the vertical direction.

According to this configuration, all or a part of the plurality of pipe members 130 connected to the fuel branch adapter 131 can be routed between the reinforcing rib 62 and the mount member 125. For this reason, the plurality of pipes 130 can be easily routed through the vicinity of the prime mover 10 supported by the mount member 125.
Further, at least a part of the plurality of pipe members 130 is routed between the prime mover 10 and the reinforcing rib 62.

According to this configuration, at least part of the plurality of pipes 130 connected to the fuel branch adapter 131 is passed from the one side (front side) of the prime mover 10 to the other through the space formed between the prime mover 10 and the reinforcing rib 62. Can be easily routed to the side (rear side).
<Belt tension adjustment device>
The belt tension adjusting device 151 includes a drive pulley 10A1 attached to a power transmission shaft 10A that transmits power from the prime mover 10 provided in the work machine 1, and a driven pulley 38A1 attached to an input shaft 38A of the driven device 38. And a tension pulley 152. The belt tension adjusting device 151 is spanned across the drive pulley 10A1, the driven pulley 38A1, and the tension pulley 152, and transmits an endless belt 150B that transmits the rotational driving force of the power transmission shaft 10A to the driven device 38. And an adjusting mechanism 153 for adjusting the tension of 150B. The adjustment mechanism 153 supports the first member 154 whose relative position to the driving pulley 10A1 and the driven pulley 38A1 is fixed, and the rotation shaft, and is movable with respect to the first member 154 and guides the movement. It has the 2nd member 157 which has the guide part 161, and the adjustment collar member 162 which moves the 2nd member 157 with respect to the 1st member 154. The axis of the rotation shaft 152A of the tension pulley 152 is disposed on an extension line of the axis L1 of the adjustment rod member 162, and the direction in which the guide portion 161 extends is parallel to the axis L1 of the adjustment rod member 162. It has shifted.

  According to this configuration, since the shaft center of the rotation shaft 152A of the tension pulley 152 is disposed on the extension line of the shaft center line L1 of the adjustment rod member 162, the force applied by the adjustment rod member 162 is not dispersed. It can be used as a force for efficiently adjusting the tension of the belt 150B. In addition, since the direction in which the guide portion 161 extends is shifted in parallel to the axis L1 of the adjustment rod member 162, the adjustment rod member 162 is prevented from being enlarged in the axial direction and is compact. And can be easily installed in a small prime mover room where space constraints are severe.

The adjustment rod member 162 is disposed above the tension pulley 152 and the axis is directed in the vertical direction. The guide portion 161 guides the second member 157 in the vertical direction with respect to the first member 154.
According to this configuration, since the size of the adjustment mechanism 153 in the front-rear direction can be reduced, the belt tension adjustment device 151 can be easily arranged in the motor room where the space restriction in the front-rear direction is severe. Further, even in a prime mover room where space restrictions in the height direction are severe, the belt tension adjusting device 151 can be configured compactly in the height direction, so that the belt tension adjusting device 151 can be easily arranged.

  The power transmission shaft 10A is the output shaft 10A of the prime mover 10, and the first member 154 is a first plate portion 155 fixed to the prime mover 10, and the first plate portion 155 is directed toward the distal end side of the output shaft 10A. And a projecting portion 155C projecting. The guide portion 161 is a long hole 161 extending parallel to the axis of the adjustment rod member 162, and the projecting portion 155 </ b> C is inserted into the long hole 161, and the second member 157 moves with respect to the long hole 161. Move relatively.

According to this configuration, the guide portion 161 can move the second member 157 relative to the first member 154 by moving the protruding portion 155 </ b> C relative to the long hole 161. It is possible to reliably perform guidance by 161 with a simple configuration.
The adjustment rod member 162 is an adjustment bolt, and the first member 154 has a through hole 156a that extends from the first plate portion 155 toward the distal end side of the output shaft 10A and through which the adjustment bolt 162 is inserted. It has the 2nd board part 156 formed. The second member 157 includes a third plate portion 158 in which a long hole 161 is formed and slides with respect to the first plate portion 155, and extends from the third plate portion 158 to the distal end side of the output shaft 10A and an adjustment bolt. And a fourth plate portion 159 in which a screw hole 159a into which the 162 is screwed is formed.

  According to this configuration, by rotating the adjustment bolt 162 about the axis, the fourth plate portion 159 is moved closer to or away from the second plate portion 156, and the third plate portion 158 is moved to the first plate portion 155. The second member 157 can be moved relative to the first member 154 while sliding with respect to the first member 154. Therefore, the tension applied to the belt 150B can be adjusted by reliably operating the adjusting mechanism 153 with a simple operation.

The protrusions 155 </ b> C are a plurality of bolts 155 </ b> C arranged at intervals in the longitudinal direction of the long holes 161. Nuts 155D are screwed into the plurality of bolts 155C, respectively, and the relative position of the third plate portion 158 with respect to the first plate portion 155 is fixed by the screwing.
According to this configuration, the second member 157 can be prevented from rotating with respect to the first member 154 by the plurality of bolts 155C. Further, the second member 157 can be prevented from being separated from the first member 154 by screwing the bolt 155C and the nut 155D. Moreover, since the 2nd member 157 can be easily removed from the 1st member 154 by removing nut 155D from the some volt | bolt 155C, the maintainability of the belt tension adjustment apparatus 151 can be improved.

Further, the first plate portion 155 has first ribs 155A and 155B extending in parallel with the axis of the adjustment rod member 162.
According to this configuration, the first ribs 155A and 155B improve the rigidity of the first plate portion 155, so that the first plate portion 155 can be prevented from being deformed by the reaction force of the tension applied to the belt 150B.

The second member 157 includes a second rib 160 that extends in parallel with the axis of the adjustment rod member 162 and is connected to the fourth plate portion 159.
According to this configuration, since the rigidity of the second plate member 157 is improved by the second rib 160, it is possible to prevent the second plate portion 157 from being deformed by the reaction force of the tension applied to the belt 150B. Further, the connection strength of the fourth plate portion 159 with respect to the third plate portion 158 can be improved. Therefore, the service life of the belt tension adjusting device 151 can be extended.

Further, the belt tension adjusting device 151 includes a fixing member 155F that fixes the first plate portion 155 and the prime mover 10, and the fixing member 155F includes at least two fixing members 155F that are arranged at intervals.
According to this configuration, it is possible to prevent the first plate portion 155 from rotating with respect to the prime mover 10 with the fixing member 155F as a fulcrum by the reaction force of the tension applied to the belt 150B.

The first member 154 is fixed to the prime mover 10 and has a locking portion 155E that can lock a hook for lifting the prime mover 10.
According to this configuration, the belt tension adjusting device 151 can be used for lifting the prime mover 10 without separately providing a member for locking a hook for lifting the prime mover 10. For this reason, the number of parts can be reduced, and the manufacturing cost can be reduced.

Further, the work machine 1 includes the belt tension adjusting device 151.
According to this configuration, it is possible to obtain the working machine 1 that exhibits the excellent effects of the belt tension adjusting device 151 described above.
<Fan cover>
The blower 16 is attached to a prime mover 10 provided in the working machine, a fan 12 attached to the output shaft 10A of the prime mover 10, and a fan shroud 13 surrounding the fan 12, and the prime mover in the axial direction of the output shaft 10A. 10 and a fan cover 170 covering a part of the region between the fan shroud 13 and the fan shroud 13. The fan cover 170 includes a first cover member 171 attached to the fan shroud 13 and a second cover member 175 detachably attached to the first cover member 171.

According to this configuration, the second cover member 175 can be removed from the first cover member 171 with the first cover member 171 attached to the fan shroud 13. Therefore, the fan 12 and peripheral devices of the fan can be accessed without removing the entire fan cover 170 from the fan shroud 13 during maintenance.
The fan shroud 13 is made of resin, and the first cover member 171 and the second cover member 175 are made of metal.

  According to this configuration, at the time of maintenance, the second cover member 175 can be removed from the first cover member 171 with the first cover member 171 attached to the resin fan shroud 13. Therefore, the frequency with which the fan cover 170 is attached to and detached from the resin fan shroud 13 can be reduced, and damage and deterioration of the fan shroud 13 due to repeated attachment and detachment can be prevented. Further, since the first cover member 171 and the second cover member 175 are made of metal, the strength of the fan cover 170 is increased, and the operator can be reliably prevented from contacting the fan 12.

Further, a nut 13a is embedded in the fan shroud 13, and the first cover member 171 is attached to the fan shroud 13 by a bolt 172b screwed to the nut 13a.
According to this configuration, the first cover member 171 can be easily and reliably attached to the fan shroud 13. Further, during the maintenance, since it is not necessary to attach / detach the first cover member 171 to / from the fan shroud 13, the nut 13a embedded in the fan shroud 13 due to repeated attachment / detachment of the first cover member 171 is removed. Can be prevented.

The first cover member 171 includes an attachment portion 172 attached to the fan shroud 13, and an extension portion 173 extending from the attachment portion 172 toward the prime mover 10 and having a notch 173a. Yes. The second cover member 175 is attached to the extending part 173 and covers the notch part 173a.
According to this configuration, the second cover member 175 is removed from the extending portion 173 in a state where the first cover member 171 is attached to the fan shroud 13 by the attachment portion 172, so that the inside of the fan cover 170 from the notch portion 173a ( You can easily access the equipment on the back side.

  Further, the fan cover 170 is disposed obliquely above the output shaft 10A and is inclined downward toward the direction away from the virtual straight line L3 extending in the vertical direction through the output shaft 10A. One end portion in the inclined direction is disposed on the side close to the lower straight line, the other end portion is disposed on the side far from the virtual straight line L3, and the notch portion 173a is notched on one end portion side of the extending portion 173 and the prime mover 10 side. Is formed.

  According to this configuration, the fan cover 170 can restrict access to the fan 120 from above and behind the fan 120. Further, by removing the second cover member 175 from the extending portion 173, the fan 12 and the like can be accessed from above the fan 12 through the notch 173a. Further, even when the second cover member 175 is removed, the extended portion 173 of the first cover member 171 can restrict access to the fan 12 and the like from the rear of the fan 12.

The first cover member 171 includes a lower plate portion 174 that is bent from the rear portion of the extending portion 173 and extends downward.
According to this configuration, the first cover member 171 can cover the fan 12 with a plurality of surfaces including the extending portion 173 and the lower plate portion 174. For this reason, the first cover member 171 can restrict access to the fan 12 from a plurality of angles.

The second cover member 175 is attached to the extending portion 173 to cover the cutout portion 173a, and the front plate portion 177 is bent from the upper portion of the cover plate portion 176 and extends to the side near the virtual straight line L3. have.
According to this configuration, the second cover member 175 can cover the fan 12 with a plurality of surfaces including the cover plate portion 176 and the front plate portion 177. For this reason, the second cover member 175 can restrict access to the fan 12 from a plurality of angles.

In addition, the work machine 1 includes the blower 16.
According to this configuration, it is possible to realize the working machine 1 that exhibits the excellent effects of the blower 16 described above.
The work machine 1 includes a prime mover 10, a drive pulley 10 </ b> A <b> 1 attached to a power transmission shaft (output shaft) 10 </ b> A that transmits power from the prime mover 10, and a driven pulley 38 </ b> A <b> 1 attached to the input shaft of the driven device 38. An endless belt 150B that is stretched over the tension pulley 152, the drive pulley 10A, the driven pulley 38A1, and the tension pulley 152, and transmits the rotational driving force of the power transmission shaft 10A to the driven device 38; An adjustment mechanism 153 that adjusts the tension of 150B, and the adjustment mechanism 153 is disposed in front of the fan cover 170.

According to this configuration, by removing the second cover member 175 from the first cover member 171, the operator can access the adjusting mechanism 153 of the belt tension adjusting device 151 to adjust the tension of the belt 150B. .
<DPF muffler cover (first cover), turbocharger cover (second cover), tail muffler>
Further, the exhaust treatment device 18 is provided with an exhaust treatment unit 18A for treating fine particles contained in the exhaust from the prime mover 10 provided in the work machine 1, a bracket 184 attached to the exhaust treatment unit 18A, a bracket 184 and A first cover 185 that covers at least a part of the exhaust processing portion 18A, and the exhaust processing portion 18A includes a first exterior member 181a having a first flange portion 181a3 and a second exterior member having a second flange portion 181b1. 181b, a first connecting portion 182A that connects the first flange portion 181a3 and the second flange portion 181b1, and the bracket 184 includes a main body side attaching portion 190 attached to the first connecting portion 182A, and a first cover. According to this configuration, the first cover 185 is attached to the first cover. -The exhaust treatment device 18 having a cover attachment structure that can be installed universally to various types of exhaust treatment units because it can be attached to the exhaust treatment unit 18A via a bracket 184 that is a separate body from the 185. It becomes. In addition, the bracket 184 can be attached to the exhaust processing unit 18A using the first connecting unit 182A that connects the first exterior member 181a and the second exterior member 181b of the exhaust processing unit 18A. For this reason, in order to attach the first cover 185 to the exhaust processing unit 18A, it is not necessary to process the exhaust processing unit 18A, change the specifications, or the like.

  In addition, the main body side attaching portion 190 includes a first connected portion 184B attached to the first connecting portion 182A, and the bracket 184 is formed in the through hole 182c and the first connected portion 184B formed in the first connecting portion 182A. The bolt 184b is inserted into the formed through-hole 184B1, and a nut is screwed into the bolt 184b to fasten the first connecting portion 182A and the first connected portion 184B, thereby attaching the exhaust processing portion 18A. ing.

According to this configuration, the bracket 184 is attached to the exhaust processing part 18A by connecting the first connecting part 182A and the first connected part 184B with the bolt 184b and the nut, so that the bracket 184 is attached to the exhaust processing part 18A. It can be easily attached and detached.
The second exterior member 181b includes a third flange portion 181b2, and the exhaust processing portion 18 includes a third exterior member 181c having a fourth flange portion 181c3, a third flange portion 181b2, and a fourth flange portion 181c3. The main body side attaching portion 190 includes a first connected portion 184B attached to the first connecting portion 182A and a second connected portion 184C attached to the second connecting portion 182B. I have.

According to this configuration, the bracket 184 is provided with the second exterior member 181b and the third exterior member 181c in addition to the first connection portion 182A that couples the first exterior member 181a and the second exterior member 181b of the exhaust processing unit 18A. Therefore, the bracket 184 can be reliably and firmly attached to the exhaust processing unit 18A.
Further, the bracket 184 inserts a bolt 184b into a through hole 182c formed in the first connecting portion 182A and a through hole 184B1 formed in the first connected portion 184B, and a nut is screwed into the bolt 184b. The first connecting portion 182A and the first connected portion 184B are fastened, and the bolt 184c is inserted into the through hole 182d formed in the second connecting portion 182B and the through hole 184C1 formed in the second connected portion 184C. The nut 207 is screwed into the bolt 184c to fasten the second connecting portion 182B and the second connected portion 184C, thereby being attached to the exhaust processing portion 18A.

  According to this configuration, in addition to connecting the first connecting portion 182A and the first connected portion 184B with the bolt 184b and the nut, the second connecting portion 182B and the second connected portion 184C are connected with the bolt 184c and the nut. Since the bracket 184 is attached to the exhaust treatment unit 18A by being connected to each other, the bracket 184 can be securely attached to the exhaust treatment unit 18A and can be easily attached and detached.

In addition, the first cover 185 includes a first cover plate 185A that covers the upper side of the exhaust processing unit 18A, and a second cover plate 185B that covers the side of the exhaust processing unit 18A (the rear of the machine body).
According to this configuration, the first cover 185 can cover the upper side and the side (the rear of the fuselage) of the exhaust processing unit 18A, thereby preventing contact from the upper side and the side (the rear of the fuselage) to the exhaust processing unit 18A. be able to.

  The first cover 185 includes a third cover plate 185C that covers the side of the exhaust processing unit 18A and connects the first cover plate 185A and the second cover plate 185B, and the first cover plate 185A or the third cover plate. An extending rib 185D extending from 185C to the second cover plate 185B, one of the first cover plate 185A and the third cover plate 185C being attached to the bracket 184, and the other being It is attached to the exhaust processing unit 18A.

  According to this configuration, the third cover plate 185C can cover the side of the exhaust processing unit 18A (the side of the fuselage), thus preventing contact from the side (the side of the fuselage) with respect to the exhaust processing unit 18A. it can. Moreover, the strength of the first cover 185 can be improved by connecting the first cover plate 185A and the second cover plate 185B by the third cover plate 185C. The extending rib 185D is not fixed to the exhaust processing unit 18A from the first cover plate 185A or the third cover plate 185C that is fixed directly to the exhaust processing unit 18A or indirectly via the bracket 184. By extending over the cover plate 185B, vibration of the second cover plate 185B that is not fixed to the exhaust processing unit 18A can be suppressed.

The exhaust processing unit 18A is a DPF muffler.
According to this configuration, the exhaust treatment device 18 has a cover mounting structure that can be mounted on a general-purpose basis with respect to various forms of DPF mufflers.
In addition, the work machine 1 includes the exhaust treatment device 18.
According to this configuration, it is possible to realize the working machine 1 that exhibits the excellent effects of the exhaust treatment device 18 described above.

Further, the work machine 1 includes a supercharger 186 connected to the prime mover 10, a front leg portion 93 erected in front of the prime mover 10, a rear leg portion 94 erected in the rear of the prime mover 10, and a front leg portion 93 and a second cover 187 that is attached to the structure 91 and covers at least a part of the supercharger 186, and a connecting part 95 that connects the upper part of 93 and the upper part of the rear leg part 94. I have.
According to this configuration, the second cover 187 covers at least a part of the supercharger 186, so that an operator can be prevented from contacting the supercharger 186 during maintenance or the like. Moreover, since the 2nd cover 187 is attached to the structure 91 with which the working machine 1 is equipped via the connection tool 187C, in order to attach the 2nd cover 187, a dedicated support member is provided or the supercharger 186 is processed. A portion of the supercharger 186 can be covered with the second cover 187 without being applied.

The second cover 187 is attached to the rear leg portion 94 and covers the rear of the supercharger 186.
According to this configuration, the second cover 187 can be easily disposed behind the supercharger 186. Further, when the worker performs a maintenance operation or the like from behind the supercharger 186, the worker can be prevented from coming into contact with the supercharger 186.

Further, the work machine 1 includes a support portion 92 that extends laterally from the connecting portion 95 of the structure 91, an upper cover 30A that covers the top of the prime mover 10 and is supported by the support portion 92, and an exhaust from the exhaust processing portion 18A. And a tail muffler 188 for reducing exhaust noise, and the tail muffler 188 passes through the upper cover 30A.
According to this configuration, even when the exhaust processing unit 18A is disposed at a position near the front above the prime mover 10, the exhaust processing unit 18A and the tail muffler 188 can be disposed without being obstructed by the upper cover 30A. Further, since the tail muffler 188 connected to the exhaust processing unit 18A can be extended upward to penetrate the upper cover 30A, it is not necessary to extend the tail muffler 188 long toward the rear.

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

DESCRIPTION OF SYMBOLS 1 Work machine 2 Airframe 3 Cabin 10 Prime mover 18 Exhaust treatment device (particle removal device)
18A Exhaust treatment part (DPF muffler)
30A Top cover 91 Frame (structure)
92 support part 93 front leg part 94 rear leg part 95 communication part 181 exterior member 181a front exterior member (first exterior member)
181a3 First flange (flange)
181b Body exterior member (second exterior member)
181b1 Second flange (flange)
181b2 Third flange (flange)
181c Rear exterior member (third exterior member)
181c3 4th flange part (flange part)
182 connecting portion 182A first connecting portion 182c through hole 182B second connecting portion 182d through hole 184 bracket 184B first connected portion 184B1 through hole 184b bolt 184C second connected portion 184C1 through hole 184c bolt 185 first cover 185A Cover plate 185B Second cover plate 185C Third cover plate 185D Extension rib 186 Supercharger 187 Second cover 188 Tail muffler 190 Body side mounting portion

Claims (11)

An exhaust treatment unit for treating fine particles contained in the exhaust from the prime mover provided in the work machine;
A bracket attached to the exhaust treatment section;
A first cover attached to the bracket and covering at least a part of the exhaust treatment unit;
With
The exhaust treatment unit includes a first exterior member having a first flange part, a second exterior member having a second flange part, and a first connection part that connects the first flange part and the second flange part. ,
The bracket is an exhaust treatment device having a main body side attachment portion attached to the first connecting portion and a cover attachment portion to which the first cover is attached. The main body side attaching portion includes a first connected portion attached to the first connecting portion,
The bracket includes a bolt inserted into a through hole formed in the first connecting portion and a through hole formed in the first connected portion, and a nut is screwed into the bolt to connect the first connecting portion to the bracket. The exhaust treatment device according to claim 1, wherein the exhaust treatment device is attached to the exhaust treatment unit by fastening the first connected portion. The second exterior member includes a third flange portion,
The exhaust treatment part includes a third exterior member having a fourth flange part, and a second connection part that connects the third flange part and the fourth flange part,
The exhaust processing according to claim 1, wherein the main body side attaching portion includes a first connected portion attached to the first connecting portion and a second connected portion attached to the second connecting portion. apparatus.   The bracket includes a bolt inserted into a through hole formed in the first connecting portion and a through hole formed in the first connected portion, and a nut is screwed into the bolt to connect the first connecting portion to the bracket. The first connected portion is fastened, a bolt is inserted into the through hole formed in the second connected portion and the through hole formed in the second connected portion, and a nut is screwed into the bolt. The exhaust treatment device according to claim 3, wherein the exhaust treatment device is attached to the exhaust treatment unit by fastening the second connection part and the second connected part.   The said 1st cover has a 1st cover board which covers the upper part of the said exhaust process part, and a 2nd cover board which covers the side of the said exhaust process part, The any one of Claims 1-4. An exhaust treatment device according to claim 1. The first cover is
A third cover plate that covers a side of the exhaust treatment unit and connects the first cover plate and the second cover plate;
An extending rib extending from the first cover plate or the third cover plate to the second cover plate;
Have
The exhaust treatment device according to claim 5, wherein one of the first cover plate and the third cover plate is attached to the bracket and the other is attached to the exhaust treatment unit.   The exhaust treatment apparatus according to claim 1, wherein the exhaust treatment unit is a DPF muffler.   A working machine comprising the exhaust treatment device according to any one of claims 1 to 7. A turbocharger connected to the prime mover;
A structure having a front leg portion erected in front of the prime mover, a rear leg portion erected in the rear of the prime mover, and a communication portion that connects the upper portion of the front leg portion and the upper portion of the rear leg portion. Body,
A second cover attached to the structure and covering at least a part of the supercharger;
The working machine according to claim 8, comprising:   The work machine according to claim 9, wherein the second cover is attached to the rear leg portion and covers at least the rear of the supercharger. A support portion extending laterally from the connecting portion of the structure;
An upper cover that covers the prime mover and is supported by the support;
A tail muffler that reduces the exhaust noise by passing the exhaust from the exhaust treatment unit;
With
The working machine according to claim 9 or 10, wherein the tail muffler passes through the upper cover.

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