CN110446847B

CN110446847B - Fuel branch adapter and working machine provided with same

Info

Publication number: CN110446847B
Application number: CN201980000713.9A
Authority: CN
Inventors: 岛井芳宪; 松井圣司
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2018-03-02
Filing date: 2019-03-01
Publication date: 2021-11-16
Anticipated expiration: 2039-03-01
Also published as: CN110446847A; WO2019168150A1

Abstract

The invention provides a fuel supply adapter which can facilitate the arrangement of a pipe material for fuel circulation. A fuel supply adapter (131) is a fuel branch adapter provided in a working machine, and the working machine is provided with: a body (2); a motor (10) mounted on the machine body and driven by fuel; and a plurality of pipes (130) through which fuel flows, wherein the fuel branching adapter has: a plurality of connection portions (132) to which the pipes are connected, respectively; a relay unit (133) in which a plurality of communication paths (135) that communicate between the plurality of connection units are formed; and a mounting portion (138) mounted to the body.

Description

Fuel branch adapter and working machine provided with same

Technical Field

The present invention relates to a fuel branch adapter that connects a plurality of pipe members through which fuel flows, and a working machine including the fuel branch adapter.

Background

A fuel supply system disclosed in patent document 1 is known in the related art.

The fuel supply system disclosed in patent document 1 includes a fuel circuit including a common rail type engine, a fuel tank for storing fuel, a fuel pump for supplying the fuel stored in the fuel tank to the engine, and a fuel filter provided on an upstream side of the fuel pump. The fuel circuit has: the fuel tank includes a fuel flow path through which fuel flows from the fuel tank via a fuel filter by driving of a fuel pump, an air removal path branched from a middle portion of the fuel flow path and connected to the fuel tank, a fuel return path through which excess fuel of an injector of the engine or the like is returned to the fuel tank, and a fuel return path branched from a middle portion of the fuel return path and connected to a fuel supply path. That is, the fuel circuit is provided with a plurality of branch paths (a branch path in which the air removal path is branched from a middle portion of the fuel flow path, and a branch path in which the fuel return path is branched from a middle portion of the fuel return path).

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. JP 2014-66203 "

Disclosure of Invention

Problems to be solved by the invention

In the fuel supply system disclosed in patent document 1, each of a plurality of branch paths provided in the fuel circuit is constituted by a different adapter (pipe connector). Specifically, a branch path in which the air removal path is branched from a middle portion of the fuel flow path is formed by an intermediate block, and a branch path in which the fuel return path is branched from a middle portion of the fuel return path is formed by an adapter different from the intermediate block. Therefore, it is necessary to connect a plurality of pipes to a plurality of adapters arranged separately, and there is a problem that arrangement of the pipes is complicated.

The present invention has been made to solve the above-described conventional problems, and an object thereof is to provide a fuel branching adapter capable of facilitating the arrangement of a pipe material through which fuel flows.

Means for solving the problems

A fuel branch adapter according to an aspect of the present invention is provided in a working machine including: a body; a motor mounted on the body and driven by fuel; and a plurality of pipes that circulate fuel, wherein the fuel branching adapter has: a plurality of connection portions to which the pipe is connected, respectively; a relay unit having a plurality of communication paths formed therein for communicating the plurality of connection units; and a mounting part mounted to the body.

Effects of the invention

According to the fuel branching adapter, since the plurality of branching paths can be collected in one fuel supply adapter and the plurality of pipe members for circulating the fuel can be connected to the adapter, the arrangement of the pipe members for circulating the fuel can be facilitated.

Drawings

Fig. 1 is a rear right perspective view showing the interior of the prime mover compartment.

Fig. 2 is a rear view showing the interior of the prime mover chamber.

Fig. 3 is a rear right perspective view of the revolving frame and the like.

Fig. 4 is a front right perspective view showing a fuel tank, a fuel pump, a main filter, a sub-filter, and the like.

Fig. 5 is a rear right perspective view showing the motor, the support column, the support bracket, the fixing member, the adapter, and the like.

Fig. 6 is a plan view showing the motor, the hydraulic pump, the adapter, the pipe, the fixing member, and the like.

Fig. 7 is a right side view showing the motor, the hydraulic pump, the adapter, the pipe, the fixing member, and the like.

FIG. 8 is a system diagram of a fuel circuit.

Fig. 9 is a rear right perspective view showing the adapter and a plurality of pipes connected to the adapter.

Fig. 10 is a rear right perspective view showing the adapter.

Fig. 11 is a rear right perspective view showing a modification of the adapter.

Fig. 12 is a left side view of the prime mover, belt tensioner, etc.

Fig. 13 is a left rear perspective view showing a main part of the belt tension adjusting apparatus.

Fig. 14 is a left side view showing the movement of the belt tension adjusting apparatus.

Fig. 15 is a rear view showing a fan shroud, a fan cover, and the like.

Fig. 16 is a right side view showing a fan, a fan shroud, a fan cover, and the like.

Fig. 17 is a rear right perspective view showing a fan shroud, a fan cover, and the like.

Fig. 18 is an exploded perspective view of the fan cover.

Fig. 19 is a left rear perspective view showing a positional relationship between the fan cover and the belt tension adjusting device after the second cover member is removed.

Fig. 20 is a rear right perspective view showing the arrangement of the DPF muffler, the supercharger, the first cover, and the second cover.

Fig. 21 is a perspective view showing an attachment structure of the first cover and the bracket.

Fig. 22 is a perspective view of the first cover viewed from the inner surface side.

Fig. 23 is a rear right perspective view showing a method of attaching the bracket to the DPF muffler.

Fig. 24 is a rear right perspective view showing the second cover, the rear leg portion, and the like.

Fig. 25 is a left rear perspective view showing the rotary board, the structure, the support bracket, and the like.

Fig. 26 is a plan view showing the inside of the prime mover chamber.

Fig. 27 is a side view of the working machine.

Fig. 28 is a plan view of the machine body and the cab.

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

< integral Structure >

First, the overall structure of the work machine 1 will be described.

Fig. 27 and 28 are schematic diagrams for explaining the overall configuration of work implement 1 according to the present embodiment. In the present embodiment, a backhoe as a swing work implement is exemplified as the work implement.

Work implement 1 includes a machine body 2, a cab 3, a travel device 4, and a work device 5.

Hereinafter, the front side (left side in fig. 27) of the driver seated in the operator's seat 6 of the cab 3 is referred to as the front side, the rear side (right side in fig. 27) of the driver is referred to as the rear side, the left side (near side in fig. 27) of the driver is referred to as the left side, and the right side (far side in fig. 27) of the driver is referred to as the right side. The horizontal direction K2 (see fig. 28), which is a direction perpendicular to the front-rear direction K1 (see fig. 27), will be described as the body width direction.

The machine body 2 has a turn table 7 supported on the traveling device 4. The turn table 7 is supported by the traveling device 4 via a turning bearing (not shown) so as to be rotatable in the left-right direction around a vertical turning axis X. The turntable 7 has a substrate (rotary substrate) 8 that rotates about a rotation axis X. The rotation base plate 8 is formed of a steel plate or the like, and is coupled to the rotation bearing.

A prime mover room ER is provided at the rear of the revolving platform 7. As shown in fig. 1, 2, 28, and the like, the prime mover 10, the hydraulic pump 11, the fan 12, the radiator 14, the compressor 37, the alternator 38, and the like are disposed in the prime mover compartment ER. The motor 10 is an engine in the present embodiment, and more specifically, a diesel engine. As shown in fig. 28, the motor 10 is disposed laterally so that the output shaft 10A faces the machine body width direction. Specifically, the tip of the output shaft 10A faces leftward. A hydraulic pump 11 is provided on the right side of the motor 10. The hydraulic pump 11 is driven by the prime mover 10 and discharges hydraulic oil for operating a hydraulic actuator provided in the working machine 1. A fan 12 is provided on the left side of the motor 10. The fan 12 is attached to the output shaft 10A of the motor, and generates a flow of air from the left to the right. The fan 12 is surrounded by a fan shroud 13. As shown in fig. 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 motor 10. Compressor 37 is disposed above the left front portion of motor 10, and compresses a refrigerant of an air conditioner that cools the interior of cab 3. The alternator 38 is disposed above the right front portion of the motor 10, and outputs dc power for storage to the battery. The hydraulic pump 11, the fan 12, the alternator 38, and the compressor 37 receive power from the motor 10 and drive the motor. A fuel cooler 15 is provided to the left of the radiator 14. A particle removing device 18 is provided at the upper right of the motor 10.

As shown in fig. 4 and 28, a side chamber (tank chamber) TR is provided in the right portion of the turntable 7. A fuel tank 19 for accumulating fuel for the motor 10 is mounted in the side chamber TR. A control valve (not shown) is provided above the rear portion of the fuel tank 19. The control valves are collectively control valves that control a plurality of hydraulic actuators (hydraulic cylinders, etc.) provided in the work machine 1. A hydraulic oil tank 21 for storing hydraulic oil to be supplied to the hydraulic actuator is provided behind the fuel tank 19. A fuel filter 22 for removing particles and the like mixed in the fuel, a separator 23 for separating and removing moisture mixed in the fuel, and a fuel pump 24 for feeding the fuel to the motor 10 are provided on the right side of the operating oil tank 21. The fuel pump 24 is connected to the fuel tank 19 on the intake side and to the fuel filter 22 on the discharge side.

As shown in fig. 27 and 28, the upper, right, left, and rear portions of the prime mover chamber ER are covered with covers 30. The hood 30 includes an upper hood 30A and a rear hood 30B.

As shown in fig. 27 and 28, the cab 3 is mounted on the front portion of the swivel base plate 8 on one side (left side) in the machine width direction. In the cab 3, a driver seat 6, a steering device (not shown), and the like are provided.

As shown in fig. 27, the working device 5 is mounted on the front portion of the turn table 7. The working mechanism 5 includes a boom 27, an arm 28, and a working tool 29. The working mechanism 5 includes a boom cylinder 47, an arm cylinder 48, and a working tool cylinder 49 as a driving mechanism (hydraulic actuator) for the boom 27, the arm 28, and the working tool 29. The boom cylinder 47, the arm cylinder 48, and the work tool cylinder 49 are hydraulic cylinders.

< revolving frame, Structure >

As shown in fig. 3, a frame structure that constitutes a revolving frame by being integrated with revolving substrate 8 is provided on revolving substrate 8. The frame structure is connected to the rotating base plate 8 by welding.

The frame structure includes a first longitudinal rib 61, a second longitudinal rib 62, a support plate 60, a first partition plate 64, a second partition plate 65, a rear frame 66, a third longitudinal rib 63, and a support table 68.

The first vertical rib 61 and the second vertical rib 62 are provided at intervals in the machine width direction on the upper portion of the revolving base plate 8. The first vertical rib 61 is provided on one side (left side) in the machine width direction of the rotating base plate 8. The second vertical rib 62 is provided on the other side (right side) in the machine width direction of the rotating base plate 8. As shown in fig. 3, the first vertical rib 61 and the second vertical rib 62 extend substantially linearly from the front to the rear on the rotating substrate 8. The support plate 60 connects the upper portion of the first vertical rib 61 to the upper portion 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 chamber ER and extend in the machine width direction. The right end of the first partition plate 64 is connected to the left side surface of the second longitudinal rib 62. The second partition plate 65 extends leftward from the left side of the first partition plate 64.

The third longitudinal rib 63 extends in the front-rear direction. The front portion of the third longitudinal rib 63 is connected to the first partition plate 64 and the second partition plate 65. The rear frame 66 extends in the machine width direction and is connected to the rear end of the third longitudinal rib 63 and the rear end of the second longitudinal rib 62. A rear support member 67 to be described later is erected behind the rear frame 66.

As shown in fig. 3 and 4, the support base 68 is provided on the right portion of the rotating base plate 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 stand 68.

< Structure for supporting Motor >

As shown in fig. 2, 5, 6, and the like, the motor 10 is supported on the revolving substrate 8 via a motor support 115. The motor support 115 includes a support bracket 120 and a support column 121. The support bracket 120 supports the front of the prime mover 10. Support column 121 supports the rear of prime mover 10.

As shown in fig. 3 and 25, the support bracket 120 is disposed between the second vertical rib 62 and the third vertical rib 63 and extends in the machine 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 rotating base plate 8 by fastening a fastening member (bolt). The upper plate 120B is disposed above the lower plate 120A. The coupling plate 120C is provided standing upward from the lower plate 120A, and couples the upper plate 120B and the lower plate 120A.

The web 120C has a vertical panel 120C1, a first side panel 120C2, and a second side panel 120C 3. The vertical plate 120C1 extends in the machine body width direction. The first side panel 120C2 is connected to the right portion of the vertical panel 120C 1. The second side panel 120C3 is attached to the left portion of the vertical panel 120C 1. The first side plate 120C2 and the second side plate 120C3 are disposed to face each other, and extend in parallel with each other in the front-rear direction. The vertical plate 120C1 is provided with an opening through which a pipe or the like can be inserted. The upper end of the linking plate 120C is inclined so as to become gradually higher from the left portion toward the right portion. Thus, the upper plate 120B is inclined such that the upper surface 120a of the right portion is higher than the upper surface 120B of the left portion.

As shown in fig. 5, a first fixing member 125 and a second fixing member 126 are attached to an upper portion of the support bracket 120 as fixing members interposed between the support bracket 120 and the motor 10. The first fixing member 125 is mounted to the upper surface 120a of the right portion of the upper plate 120B. The second fixing member 126 is attached to the upper surface 120B of the left portion 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 fixing member 125 is disposed at a position higher than the second fixing member 126.

The first fixing member 125 and the second fixing member 126 have a vibration preventing member 119 and a mounting portion 118, respectively. The vibration isolation member 119 is formed by integrating an elastic body (vibration isolation rubber) with a metal plate or the like. The mounting portion 118 (first mounting portion 118A) of the first fixing member 125 is mounted at the front portion thereof to the right portion of the upper plate 120B, and at the rear portion thereof to the right front portion of the prime mover 10. The mounting portion 118 (second mounting portion 118B) of the second fixing member 126 is mounted at the front to the left of the upper plate 120B, and at the rear to the left front of the prime mover 10.

As shown in fig. 3 and the like, the support column 121 includes a first support column 121A and a second support column 121B.

As shown in fig. 2, a third fixing member 127 is attached to an upper portion of the first support column 121A. A fourth fixing member 128 is attached to an upper portion of the second support column 121B. Since the first support column 121A is higher than the second support column 121B, the third fixing member 127 is disposed at a higher position than the fourth fixing member 128.

The third fixing member 127 and the fourth fixing member 128 have a vibration preventing member 119 and a mounting portion 118, respectively. The vibration preventing member 119 has the same structure as the vibration preventing member 119 described above. The mounting portion (third mounting portion 118C) of the third fixing member 127 is mounted at the rear to the first support column 121A and at the front to the right rear of the motor 10. The mounting portion 118 (fourth mounting portion 118D) of the fourth fixing member 128 is mounted at the rear to the second support column 121B and at the front to the left rear of the motor 10.

< adapter (Fuel Branch adapter) >

As shown in fig. 4 and 8, the working machine 1 includes a fuel circuit 25 for supplying the fuel stored in the fuel tank 19 to the motor 10. As shown in fig. 8, the fuel circuit 25 includes a fuel supply path 25a, a return path 25b, a fuel return path 25c, and an air removal path 25 d.

In the present embodiment, the prime mover 10 is a common rail diesel engine. The common rail type diesel engine includes a supply pump (fuel pressure feed pump) that generates high-pressure fuel from supplied fuel, a rail (accumulator chamber) that accumulates the high-pressure fuel generated by the supply pump, and an injector that injects the high-pressure fuel accumulated in the rail under control of an ECU (engine control unit).

The fuel supply path 25a is a path for transporting the fuel accumulated in the fuel tank 19 to the motor 10. The fuel supply path 25a connects the fuel tank 19 and the motor 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 (the 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 composed of an electromagnetic pump, and is driven by turning on an ignition key switch to deliver the fuel accumulated in the fuel tank 19 to the motor 1 side. The fuel filter 22 removes foreign matter contained in the fuel that is sent from the fuel tank 19 to the motor 10. The fuel filter 22 includes a main filter 22a and a sub-filter 22b, and the sub-filter 22b is disposed upstream of the main filter 22 a. As shown in fig. 4, the sub-filter 22b is disposed below the main filter 22 a. The fuel pump 24 is disposed below the upper portion (connection port) of the sub-filter 22b and below the separator 23.

The return path 25b is a path for returning fuel (surplus fuel in the supply pump or the injector) discharged from the motor (common rail diesel engine) 10 to the fuel tank 19. The return path 25b connects the prime mover 10 to the most upstream position of the fuel supply path 25a (between the fuel tank 19 and the separator 23). The return path 25b is provided with a check valve 83 and a return valve 84 in this order from the upstream side (the motor 10 side). The check valve 83 allows the flow of fuel in the direction from the motor 10 side toward the fuel tank 19 side, and prevents the flow of fuel in the reverse direction (the direction from the fuel tank 19 side toward the motor 10 side). The return valve 84 is a temperature-sensitive valve, and when the temperature of the fuel flowing through the return path 25b is lower than a predetermined temperature, the return valve 84 is opened to allow the fuel to flow therethrough, and when the temperature is equal to or higher than the predetermined temperature, the return valve 84 is closed to block the fuel from flowing therethrough.

The fuel return path 25c is a path for branching and taking out the fuel flowing through the return path 25b when the return valve 84 is closed, and returning the fuel to the fuel tank 19. The fuel return path 25c branches from an intermediate portion on the upstream side of the return path 25b (between the check valve 83 and the motor 10), and connects the intermediate portion to the fuel tank 19. The fuel return path 25c is provided with a fuel cooler 15. The fuel cooler 15 cools the fuel that branches off from the return path 25b and returns to the fuel tank 19.

The air removal path 25d is a path for removing air contained in the fuel supplied to the motor 10. The air removal path 25d connects the fuel filter 22 (main filter 22a) to a middle portion on the downstream side of the fuel return path 25c (between the fuel cooler 15 and the fuel tank 19).

The fuel accumulated in the fuel tank 19 is introduced into the fuel supply path 25a by driving the fuel pump 24. The fuel introduced into the fuel supply path 25a is supplied to the motor 1 after the separator 23 removes moisture and the fuel filter 22 removes foreign matter. The air contained in the fuel is removed by the fuel filter 22 before being supplied to the prime mover 1, and is returned to the fuel tank 19 through the air removal path 25d and the fuel return path 25 c.

The fuel discharged from the motor 10 is introduced into the return path 25 b. When the fuel introduced into the return path 25b is at a predetermined temperature or higher, the return valve 84 is closed, and therefore the fuel is introduced into the fuel return path 25c, cooled by the fuel cooler 15, and then returned to the fuel tank 19. When the fuel introduced into the return passage 25b is lower than the predetermined temperature, the return valve 84 is opened, and therefore the fuel returns to the fuel supply passage 25 a. Since the fuel returned to the fuel supply path 25a is heated by the motor 10 and is not cooled by the fuel cooler 15, the wax component of the fuel is not precipitated. Therefore, the fuel filter 22 can be prevented 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 include a branch path (referred to as a first branch path 136) connecting the fuel return path 25c and a middle portion of the return path 25b, and a branch path (referred to as a second branch path 137) connecting the main filter 22a and a middle portion of the fuel return path 25 c. 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 materials 130 connected to the fuel branch adapter 131 will be described mainly with reference to fig. 9 to 11. The plurality of pipe members 130 constitute a fuel supply path 25a, a return path 25b, a fuel return path 25c, and an air removal path 25 d. The pipe 130 is a hollow hose, tube, or the like.

Fig. 9 shows a fuel branch adapter 131 and a plurality of tubes 130, and fig. 10 shows the fuel branch adapter 131. In fig. 9 and 10, arrow a1 indicates the front, arrow a2 indicates the rear, arrow B1 indicates the left, and arrow B2 indicates the right.

Fuel branch adapter 131 includes a plurality of connection portions 132, relay portions 133, and mounting portions 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 132 f. The plurality of connection portions 132 protrude from an outer surface of the relay portion 133. In the case of the present embodiment, the relay unit 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 unit 133 is a rectangular parallelepiped member, and the longitudinal direction thereof is oriented in the front-rear direction.

The connection portions 132 have a hollow pipe shape, and protrude outward from the outer surface of the relay portion 133. The pipe material 130 can be connected to the connection portion 132 by fitting the inner peripheral surface of the pipe material 130 to the outer peripheral surface of the connection portion 132.

The first connection portion 132a protrudes toward the left from the left surface of the relay portion 133. The second connection portion 132b protrudes rearward from the rear surface of the relay portion 133, and then is bent downward. The third connection portion 132c protrudes rightward from the rear portion of the right surface of the relay portion 133. The fourth connection 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 connection portion 132f protrudes upward from the upper surface of the relay portion 133, and then is bent rightward.

The connecting portions 130 are connected to a plurality of pipes 130, respectively. The plurality of pipes 130 are pipes through which fuel for driving the prime mover 10 flows. The outer peripheral surfaces of the plurality of pipe members 130 are respectively covered with the cladding pipe 130A. The plurality of tubes 130 includes a first tube 130a, a second tube 130b, a third tube 130c, a fourth tube 130d, a fifth tube 130e, a sixth tube 130f, and a seventh tube 130 g.

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

The inner diameter of the fourth tube 130d is smaller than the inner diameters of the other tubes (the first to third tubes, the fifth to seventh tubes). This can prevent the air removed by the fourth pipe 130d from heading toward the prime mover 10.

As shown in fig. 10, a relay path 134 for relaying 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 connects one connection portion 132 to another plurality of connection portions 132. The plurality of branch paths 135 includes a first branch path 136 and a second branch path 137.

The first branch path 136 is formed at the rear of the relay 133. The first branch path 136 is a branch path that connects the first connection portion 132a with the second connection portion 132b and the third connection portion 132 c. Specifically, the first branch path 136 is a T-shaped branch path including a first path 136a and a second path 136 b.

The first passage 136a is a passage extending from one side to the other side in the width direction of the machine body. 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 132 c. Thereby, as shown in fig. 8, the first tube 130a connected to the first connection portion 132a and the third tube 130c connected to the third connection portion 132c communicate with each other. The first pipe 130a, the third pipe 130c, and the first passage 136a constitute a part of the return path 25b (a path from the prime mover 10 to the check valve 83).

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

The second branch path 137 is formed in front of the relay 133. The second branch path 137 is a branch path that connects the fourth connection portion 132d with the fifth connection portion 132e and the sixth connection portion 132 f. Specifically, the second branch path 137 is a T-shaped branch path including a third path 137a and a fourth path 137 b.

The third passage 137a is a passage extending in the up-down direction. As shown in fig. 10, the first passage 136a of the first branch path 136 and the third passage 137a of the second branch path 137 are separated from each other and formed to extend in different directions (orthogonal directions in the rear view). 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 132 f. Thereby, the fifth pipe material 130e connected to the fifth connection portion 132e and the sixth pipe material 130f connected to the sixth connection portion 132f communicate with each other. The fifth pipe 130e, the sixth pipe 130f, and the third passage 137a constitute a part of the fuel return path 25c (a path from the outlet of the fuel cooler 15 to the fuel tank 10).

The fourth passage 137b is a passage that branches from a middle portion of the third passage 137a and extends in the other side (right side) in the machine body width direction. The fourth passage 137b communicates with the fourth connection portion 132 d. Thus, the fourth pipe member 130d connected to the fourth connection portion 132d communicates with the sixth pipe member 130f connected to the sixth connection portion 132f and the fifth pipe member 130e connected to the fifth connection portion 136 e. The fourth passage 137b and the fourth tube 130d constitute an air removing path 25 d.

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 in a state of being separated from each other inside the relay unit 133, and the first path 136a and the third path 137a, which are paths linearly penetrating the relay unit 133, are arranged in directions orthogonal to each other in a rear view. 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 a plan view.

The mounting portion 138 is mounted to the body 2. In detail, the mounting portion 138 is mounted to the support bracket 120.

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

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

As shown in fig. 10, the fuel branch adapter 131 has a grip portion 139 that holds a tube material different from the tube material connected to the connection portion 132 among the plurality of tube materials 130. In the case of the present embodiment, the grip 139 holds the seventh pipe material 130 g. The holding portion 139 has a first extending portion 139a, a second extending portion 139b and a restraining portion 139 c. The first extension 139a extends leftward from the mounting portion 138 and then downward. The first extending portion 139a has an L-shaped plate shape in front view, and one surface faces forward and the other surface faces rearward. The second extension 139b extends rearward from the lower end of the first extension 139 a. The second extending portion 139b has a plate shape, and one surface faces upward and the other surface faces downward. A through hole is formed in the second extension 139 b. The restraining portion 139c is a band-shaped member (a binding band or the like) fixed to the through hole of the second extending portion 139b by a screw or the like, for example, and holds the seventh tube member 130g by being wound around the outer periphery of the seventh tube member 130 g. The form of the restraining portion 139c is not limited as long as it can hold the tube material 130, and may be, for example, an annular member through which the tube material 130 can be inserted.

As shown in fig. 5, 6, and 7, fuel branch adapter 131 is attached to support bracket 120. As shown in fig. 6, at least a part (rear part in the case of the present embodiment) of the fuel branching adapter 131 is disposed between the support bracket 120 and the hydraulic pump 11 in the front-rear direction. As shown in fig. 7, fuel branch adapter 131 is disposed between reinforcing rib 62 and first fixing member 125 in the vertical direction. The fuel branching adapter 131 is disposed below the fuel filter 22, the separator 23, and the fuel pump 24 shown in fig. 4.

As shown in fig. 10, the first connection 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 machine 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 130a connected to the first connection portion 132a extends from the fuel branch adapter 131 toward the prime mover 10. The first pipe 130a extends from the fuel branch adapter 131 to the prime mover 10 side, passes through the front of the prime mover 10, and extends in the left direction.

As shown in fig. 10, the second connection portion 132b protrudes rearward from the second passage 136b opened in the rear surface of the relay portion 133, and then is bent downward. Thereby, as shown in fig. 6, the second pipe material 130b connected to the second connection portion 132b extends downward from the fuel branch adapter 131. The second pipe 130b extends downward from the fuel branch adapter 131, then bends forward and passes below the prime mover 10 to extend rearward.

As shown in fig. 10, the third connecting portion 132c protrudes toward the other side (right side) in the machine body width direction from the other end side of the first passage 136a that opens on the right surface of the relay portion 133. Thereby, as shown in fig. 6, the third pipe material 130c connected to the third connection portion 132c extends rightward from the fuel branch adapter 131. The third pipe member 130c extends rightward from the fuel branch adapter 131, passes through the front of the hydraulic pump 11, extends rightward and forward, and further extends toward the side chamber TR.

As shown in fig. 10, the fourth connecting portion 132d protrudes toward the other side (right side) in the machine body width direction from the fourth passage 137b that opens at the right surface of the relay portion 133. Thereby, as shown in fig. 6, the fourth pipe 130d connected to the fourth connection portion 132d extends rightward from the fuel branch adapter 131. The fourth pipe member 130d extends rightward from the fuel branch adapter 131, passes through the front of the hydraulic pump 11, extends rightward and forward, and further extends toward the side chamber TR.

As shown in fig. 10, the fifth connection portion 132e protrudes downward from one end side of the third passage 137a that opens on the lower surface of the relay portion 133. Thereby, as shown in fig. 6, the fifth pipe material 130e connected to the fifth connection portion 132e extends downward from the fuel branch adapter 131. The fifth pipe member 130e extends downward from the fuel branch adapter 131, then bends rearward, passes below the motor 10, and extends rearward.

As shown in fig. 10, the sixth connecting portion 132f protrudes upward from the other end side of the third passage 137a that opens on the upper surface of the relay portion 133, and then is bent toward the other side (right side) in the machine body width direction. Thereby, as shown in fig. 6, the sixth pipe 130f connected to the sixth connection portion 132f extends rightward from the fuel branch adapter 131. The sixth pipe member 130f extends rightward from the fuel branch adapter 131, then passes through the front of the hydraulic pump 11, extends rightward and forward, and further extends toward the side chamber TR.

The seventh pipe 130g extends rightward from the left of the fuel branching adapter 131, and the middle portion thereof is held by the holding portion 139.

At least a portion of the plurality of tubes 130 is disposed through between the prime mover 10 and the reinforcement ribs 62. As shown in fig. 6, in the present embodiment, the third pipe 130c, the fourth pipe 130d, the sixth pipe 130f, and the seventh pipe 130g are arranged to pass between the prime mover 10 and the reinforcing rib 62. The third, fourth, sixth, and

seventh pipe materials

130c, 130d, 130f, and 130g pass through the front of the hydraulic pump 11 and extend rightward.

As shown in fig. 3, 5, and the like, a holding portion 120B1 is provided at the rear of the upper plate 120B 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 project rearward from the rear portion of the upper plate 120B. The tube material 130 can be held by the holding portion 120B1 by inserting the tube material 130 into a space formed between the holding portion 120B1 and the upper plate 120B. In the case of the present embodiment, the holding portion 120B1 holds the first tube material 130a and the seventh tube material 130 g.

Fig. 11 shows a modification of fuel branch adapter 131. Hereinafter, a modified adapter will be described centering on a configuration different from that of the adapter shown in fig. 10, and the same configuration (corresponding configuration) will be denoted by the same reference numeral, and a part or all of the description will be omitted.

Fuel branching adapter 131 according to the modification includes a plurality of connecting portions 132, relay portions 133, and mounting portions 138. Each of the plurality of connecting portions 132 protrudes outward from the outer surface of the relay portion 133. The plurality of connection portions 132 include a first connection portion 132a, a second connection portion 132b, a third connection portion 132c, a fourth connection portion 132d, a fifth connection portion 132e, a sixth connection portion 132f, a seventh connection portion 132g, and an eighth connection portion 132 h.

The first connection portion 132a protrudes downward from the lower surface of the relay portion 133, and then is bent leftward (toward the motor 10). The first tube 130a is connected to the first connection portion 132 a. The second connection portion 132b protrudes rearward from the rear surface of the relay portion 133, and then is bent downward. The second pipe 130b is connected to the second connection portion 132 b. The third connecting portion 132c protrudes rightward (the side opposite to the motor 10) from the right surface of the relay portion 133. A third pipe 130c is connected to the third connection portion 132 c. The fourth connection portion 132d protrudes rightward from the right surface of the relay portion 133. The fourth connecting portion 132d is disposed in front of the third connecting portion 132 c. The fourth pipe 130d is connected to the fourth connection portion 132 d. The fifth connection portion 132e protrudes downward from the lower surface of the relay portion 133.

The fifth connecting portion 132e is disposed in front of the first connecting portion 132 a. A fifth pipe material 130e is connected to the fifth connection portion 132 e. The sixth connecting portion 132f protrudes rightward from the right surface of the relay portion 133. The sixth connection portion 132f is disposed above the fourth connection portion 132 d. A sixth pipe 130f is connected to the sixth connection portion 132 f. The seventh connecting portion 132g protrudes rightward from the right surface of the relay portion 133. The seventh connecting portion 132g is disposed in front of the sixth connecting portion 132 f. The eighth connecting portion 132h protrudes toward the left from the left surface of the relay portion 133. The seventh pipe 130g is connected to the seventh connection portion 132g and the eighth connection portion 132 h. Specifically, the seventh pipe 130g includes a prime mover side pipe 130g1 and a fuel filter side pipe 130g 2. 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 132 h. The fuel filter side pipe 130g2 has one end connected to the main filter 22a and the other end connected to the seventh connection portion 132 g.

The relay unit 133 is provided with a relay path 134 for relaying the plurality of connection units 132. The trunk path 134 includes a plurality of branch paths 135 and a through path 140. Each of the plurality of branch paths 135 is a branch path that connects one connection portion 132 to another plurality of connection portions 132. The through path 140 relays the seventh connection portion 132g and the eighth connection portion 132 h.

The plurality of branch paths 135 includes a first branch path 136 and a second branch path 137. The first branch path 136 is a branch path formed at the rear of the relay unit 133. The first branch path 136 is a branch path that connects the first connection portion 132a with the second connection portion 132b and the third connection portion 132 c. The second branch path 137 is a branch path formed in the front of the relay 133. The second branch path 137 is a branch path that connects the fourth connection portion 132d with the fifth connection portion 132e and the sixth connection portion 132 f. The through path 140 communicates the seventh connection portion 132g with the eighth connection portion 132 h.

Further, the fuel branch adapter 131 shown in fig. 10 may be provided with a through passage 140 that communicates between a seventh connection portion 132g and an eighth connection portion 132h, the fuel filter side pipe material 130g2 may be connected to the seventh connection portion 132g, and the prime mover side pipe material 130g1 may be connected to the eighth connection portion 132 h.

In the present embodiment, the configuration in which the fuel branching adapter 131 includes the plurality of branching paths 135 has been described, but the present invention is not limited to this configuration, and any configuration may be used as long as it includes a plurality of communication paths that communicate the plurality of connection portions 132 with each other. For example, a plurality of communication paths that communicate two of the connection portions 132 with each other may be provided, or a communication path that communicates two of the connection portions 132 with each other and a communication path (branch path) that communicates three or more of the connection portions 132 with each other may be provided.

< Belt tension adjusting device >

As shown in fig. 12, the working machine 1 includes a belt tension adjusting device 151, and the belt tension adjusting device 151 adjusts the tension of a belt that transmits power from the prime mover 10 to a driven device.

The belt tension adjusting device 151 includes: a drive pulley 10A1, the drive pulley 10A1 being attached to a power transmission shaft 10A, the power transmission shaft 10A transmitting power from a prime mover 10 provided in the working machine 1; a driven pulley 38A1, the driven pulley 38A1 being mounted to the input shaft 38A of the driven device 38; and a tension pulley 152. The belt tension adjusting device 151 includes: an endless belt 150B that is stretched over the driving pulley 10A1, 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; and an adjusting mechanism 153, the adjusting mechanism 153 adjusting the tension of the belt 150B. The adjustment mechanism 153 includes: a first member 154, the relative position of the first member 154 with respect to the driving pulley 10a1 and the driven pulley 38a1 being fixed; a second member 157 which supports the rotation shaft, is movable relative to the first member 154, and has a guide portion 161 for guiding the movement; and an adjustment lever member 162, the adjustment lever member 162 moving the second member 157 relative to the first member 154. The axis of the rotation shaft 152A of the tension pulley 152 is disposed on the extension of the axis L1 of the adjustment lever member 162, and the direction in which the guide portion 161 extends is offset in parallel with the axis L1 of the adjustment lever member 162.

According to this configuration, by disposing the axial center of the rotating shaft 152A of the tension pulley 152 on the extension line of the axial center line L1 of the adjustment lever member 162, the force applied by the adjustment lever member 162 can be utilized as a force for efficiently adjusting the tension of the belt 150B without being dispersed. Further, by offsetting the direction in which the guide portion 161 extends in parallel with the axial line L1 of the adjustment lever member 162, the adjustment lever member 162 can be configured compactly while avoiding an increase in size in the axial direction, and can be easily installed in a motor room in which space restrictions are strict and narrow.

< Fan housing >

As shown in fig. 1, 2, 15, and 16, work machine 1 includes air blower 16, and air blower 16 includes fan 12, fan shroud 13, and fan cover 170. The fan cover 170 is attached to a fan shroud 13 that surrounds the periphery of the fan 12. Fan cover 170 is a cover for preventing a worker from coming into contact with rotating fan 12.

The blower 16 includes: a prime mover 10, the prime mover 10 being provided to the working machine; a fan 12, the fan 12 being attached to an output shaft 10A of the prime mover 10; and a fan cover 170 attached to the fan shroud 13 surrounding the periphery of the fan 12, the fan cover 170 covering 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 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.

With this configuration, the second cover member 175 can be detached from the first cover member 171 in a state where the first cover member 171 is attached to the fan shroud 13. Therefore, the fan 12 and the peripheral devices of the fan can be obtained without detaching the entire fan cover 170 from the fan shroud 13 at the time of maintenance.

< DPF silencer cover (first cover), supercharger cover (second cover) >

< DPF silencer >

As shown in fig. 20, 28, and the like, a particle removal device (exhaust gas treatment device) 18 is provided in the engine room ER. The particle removal device 18 treats fine particles containing harmful substances in the exhaust gas (exhaust gas) from the motor 10. The particle removing device 18 includes an exhaust gas treatment portion 18A, a bracket 184, and a first cover 185. In the present embodiment, the exhaust gas treatment section 18A is formed of a DPF (Diesel Particulate Filter) muffler. The exhaust gas treatment unit 18A treats fine particles contained in the exhaust gas discharged from the motor 10. Specifically, the exhaust gas treatment unit 18A captures and burns particulate matter contained in the exhaust gas discharged from the motor 10. The exhaust gas treatment unit 18A is not limited to the DPF muffler, and may be configured to treat particulates contained in the exhaust gas discharged from the motor 10.

The exhaust gas treatment device 18 includes an exhaust gas treatment unit 18A that treats particulates contained in exhaust gas from the prime mover 10 provided in the working machine 1, a bracket 184 attached to the exhaust gas treatment unit 18A, and a first cover 185 attached to the bracket 184 and covering at least a portion of the exhaust gas treatment unit 18A, the exhaust gas treatment unit 18A includes a first exterior member 181a having a first flange portion 181a3, a second exterior member 181b having a second flange portion 181b1, and a first connecting portion 182A that connects the first flange portion 181a3 and the second flange portion 181b1, and the bracket 184 includes a body-side mounting portion 190 attached to the first connecting portion 182A and a cover mounting portion attached to the first cover 185.

According to this configuration, since first cover 185 can be attached to exhaust gas treatment unit 18A via bracket 184 that is separate from first cover 185, exhaust gas treatment device 18 having a cover attachment structure that can be universally attached to various types of exhaust gas treatment units is provided. Further, bracket 184 can be attached to exhaust gas treatment unit 18A by first connecting portion 182A connecting first exterior member 181a and second exterior member 181b of exhaust gas treatment unit 18A. Therefore, in order to attach first cover 185 to exhaust gas treatment unit 18A, it is not necessary to perform machining, specification change, and the like of exhaust gas treatment unit 18A.

< effects >

The working machine 1 of the present embodiment can exhibit the following effects.

Fuel branch adapter 131 is provided in work machine 1, and work machine 1 includes: a machine body 2; a motor 10 mounted on the machine body 2 and driven by fuel; and a plurality of pipes 130 through which fuel flows, wherein the fuel branching adapter has: a plurality of connection portions 132, the plurality of connection portions 132 being connected to the tube 130, respectively; a relay section 133 in which a plurality of communication paths (branch paths) 135 that communicate between the plurality of connection sections 132 are formed; and a mounting portion 138, the mounting portion 138 being mounted to the body 2.

According to this configuration, since the plurality of communication paths 135 can be concentrated on one fuel branch adapter 131 attached to the machine body 2 and the plurality of pipe members 130 through which the fuel flows can be connected to the fuel branch adapter 131, the arrangement of the pipe members through which the fuel flows can be facilitated. Further, since the positions and paths of the plurality of pipes 130 can be fixed by attaching the fuel branching adapter 131 to the machine body 2, the pipes can be prevented from coming into contact with equipment (a prime mover, a hydraulic pump, etc.), and vibration and abrasion of the pipes can be prevented. Further, since the mounting portion 138 can be attached to and detached from the machine body 2 in a state where the plurality of pipe members 130 are connected to the fuel branch adapter 131, the assembly work of the pipe members and the like at the time of production and maintenance can be facilitated.

The plurality of communication paths 135 are branch paths that communicate one connection 132 with the other plurality of connection 132.

According to this configuration, since a plurality of branch paths 135 for communicating the pipe material connected to one connection portion 132 with the pipe materials connected to the other plurality of connection portions 132 are formed in one fuel branch adapter 131, the plurality of pipe materials respectively communicating with the plurality of branch paths 135 can be collectively connected to one fuel branch adapter 131, and the arrangement of the pipe materials can be facilitated.

In addition, the plurality of pipes 130 include an air removal pipe for removing air contained in the fuel.

With this configuration, the air removal pipe can be prevented from coming into contact with equipment (such as a prime mover and a hydraulic pump), and vibration and abrasion of the air removal pipe can be prevented. In addition, the assembling work of the air removal pipe material during production and maintenance can be facilitated.

In addition, the fuel branch adapter 131 has a grip portion 139 that holds a tube material different from the tube material connected to the connection portion 132.

According to this configuration, unlike the pipe connected to the connection portion 132, the pipe arranged to pass through the vicinity of the fuel branch adapter 131 can be held and positioned at the grip portion 139 of the fuel branch adapter 131. Therefore, the pipe material connected to the connection portion 132 and the pipe material arranged to pass through the vicinity of the fuel branch adapter 131 can be arranged so as not to be entangled with each other.

The plurality of branch paths 135 includes a first branch path 136 and a second branch path 137, and the plurality of connection portions 132 includes a first connection portion 132a, a second connection portion 132b, a third connection portion 132c, a fourth connection portion 132d, a fifth connection portion 132e, and a sixth connection portion 132 f. The first branch path 136 is a branch path that connects the first connection portion 132a with the second connection portion 132b and the third connection portion 132 c. The second branch path 137 is a branch path that connects the fourth connection portion 132d with the fifth connection portion 132e and the sixth connection portion 132 f.

According to this configuration, three connecting portions (the first connecting portion 132a, the second connecting portion 132, and the third connecting portion 132c) that communicate with each other through the first branch passage 136 and three connecting portions (the fourth connecting portion 132d, the fifth connecting portion 132e, and the sixth connecting portion 132f) that communicate with each other through the second branch passage 137 can be collected in one fuel branch adapter 131. Therefore, the tube material connected to the three connection portions communicating with each other through the first branch path 136 and the tube material connected to the three connection portions communicating with each other through the second branch path 137 can be easily arranged so that the paths and the positions are fixed.

The first branch path 136 is a T-shaped branch path including a first path 136a extending in the width direction of the body 2 and a second path 136b branched from a middle portion of the first path 136a and extending rearward, and the second branch path 137 is a T-shaped branch path including a third path 137a and a fourth path 137b, the third path 137a extending in the vertical direction, and the fourth path 137b branched from a middle portion of the third path 137a and extending in one of the width directions of the body.

According to this configuration, the plurality of pipe members 130 connected to the fuel branch adapter 131 can be easily arranged toward the machine body width direction, the vertical direction, and the rear.

The first connection portion 132a protrudes from one end side of the first passage 136a toward the prime mover 10 disposed on one side in the machine width direction. The second connecting portion 132b protrudes rearward from the second passage 136b and then bends downward, and the third connecting portion 132c protrudes from the other end side of the first passage 136a toward the other side in the machine body width direction. The fourth connection portion 132d protrudes from the fourth passage 137b toward the other side in the machine body width direction, and the fifth connection portion 132e protrudes downward from one end side of the third passage 137 a. The sixth connection portion 132f protrudes upward from the other end side of the third passage 137a, and then is bent toward the other side in the machine body width direction.

According to this configuration, the pipe material 130a connected to the first connection portion 132a can be arranged to face 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 arranged to face downward of the fuel branch adapter 131. The pipe member 130 connected to the third connection portion 132c, the pipe member 130 connected to the fourth connection portion 132d, and the pipe member 130 connected to the sixth connection portion 132f can be arranged on the opposite side of the motor 10.

Further, work implement 1 includes fuel branch adapter 131 described above.

With this configuration, work implement 1 can be realized that can exhibit the excellent effects of fuel branch adapter 131 described above.

Further, the working machine 1 includes: a fuel tank 19, the fuel tank 19 accumulating fuel; a fuel supply path 25a for supplying the fuel accumulated in the fuel tank 19 to the motor 10; a valve (return valve) 84 provided in a return passage 25b for returning the fuel discharged from the motor 10 to the fuel supply passage 25 a; a fuel cooler 15, the fuel cooler 15 cooling fuel; and a fuel filter 22, wherein the fuel filter 22 removes foreign matters from the fuel supplied from the fuel pump 24 to the motor 10. The plurality of pipes 130 include a first pipe 130a connecting the prime mover 10 to the first connection portion 132a, a second pipe 130b connecting the second connection portion 132b to the fuel cooler 15, and a third pipe 130c connecting the third connection portion 132c to the valve 84, and the plurality of pipes 130 include a fourth pipe 130d connecting the fuel filter 22 to the fourth connection portion 132d, a fifth pipe 130e connecting the fuel cooler 15 to the fifth connection portion 132e, and a sixth pipe 130f connecting the sixth connection portion 132f to the fuel tank 19.

According to this configuration, it is possible to facilitate the arrangement of the plurality of pipe members constituting the fuel circuit, prevent vibration and abrasion of the pipe members, and facilitate the assembly work of the pipe members and the like during production and maintenance.

The machine body 2 includes a base plate 8 and a support bracket 120, the support bracket 120 is provided on the base plate 8 and supports the motor 10, and the mounting portion 138 is attached to the support bracket 120.

According to this configuration, the fuel branching adapter 131 to which the plurality of pipes 130 are connected can be positioned and arranged near the prime mover 10. This makes it possible to easily arrange a plurality of pipes connected to the prime mover 10 and equipment (hydraulic pump and the like) around the prime mover.

The working machine 1 further includes a hydraulic actuator and a hydraulic pump 11, and the hydraulic pump 11 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 branching adapter 131 is disposed between the support bracket 120 and the fuel pump 24 in the front-rear direction.

With this configuration, all or a part of the plurality of pipe members 130 connected to the fuel branch adapter 131 can be easily arranged to pass between the support bracket 120 and the hydraulic pump 11.

Further, the machine body 2 has a reinforcing rib 62 provided on the upper portion of the base plate 8 and extending in the front-rear direction, a fixing member 125 is interposed between the support bracket 120 and the motor 10, and the fuel branch adapter 131 is disposed between the reinforcing rib 62 and the fixing member 125 in the vertical direction.

According to this structure, all or a part of the plurality of pipes 130 connected to the fuel branch adapter 131 can be arranged to pass between the reinforcing rib 62 and the fixing member 125. Therefore, the plurality of pipes 130 can be easily arranged to pass through the vicinity of the motor 10 supported by the fixing member 125.

In addition, at least a portion of the plurality of tubes 130 is disposed to pass between the prime mover 10 and the reinforcing ribs 62.

According to this configuration, at least a part of the plurality of pipes 130 connected to the fuel branch adapter 131 can be easily arranged from one side (front side) of the motor 10 to the other side (rear side) thereof through the space formed between the motor 10 and the reinforcing rib 62.

While one embodiment of the present invention has been described above, the embodiment disclosed herein is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the claims rather than the description above, and all modifications equivalent in meaning and scope to the claims are intended to be included therein.

Description of the reference numerals

2 machine body

8 Rotary base plate (base plate)

10 prime mover

11 hydraulic pump

15 fuel cooler

19 fuel tank

22 Fuel filter (Filter)

62 second longitudinal rib (strengthening rib)

81 pipeline

83 check valve

84 return valve

120 support bracket

125 first fixing member (fixing member)

130 tube (Flexible pipe)

130a first pipe material

130b second tubular material

130c third tubular material

130d fourth tube (tube for air removal)

130e fifth pipe material

130f sixth pipe

131 fuel branch adapter

132 connecting part

132a first connection portion

132b second connecting part

132c third connecting part

132d fourth connecting part

132e fifth connecting part

132f sixth connecting part

133 Relay part

134 relay path

135 branch path (communication path)

136 first branch path

136a first path

136b second path

137 second branch path

137a third path

137b fourth path

138 mounting part

139 clamping part

Claims

1. A fuel branch adapter provided to a working machine having: a body; a motor mounted on the body and driven by fuel; and a plurality of tubes that circulate the fuel,

the fuel branch adapter has: a plurality of connection portions to which the pipe is connected, respectively; a relay portion formed with a plurality of communication paths that communicate between the plurality of connection portions; and a mounting portion mounted to the body,

the plurality of communication paths include:

a first T-shaped branch path including a first passage extending from one side to the other side in the width direction of the machine body and a second passage branching from a middle portion of the first passage and extending in the front-rear direction of the machine body; and

a T-shaped second branch path including a third path extending in the vertical direction and a fourth path branching from a middle portion of the third path and extending in the width direction,

the plurality of connection portions include:

a first connection portion protruding from one end side of the first passage to one side in the width direction;

a second connection portion protruding from the second passage in the front-rear direction;

a third connecting portion that protrudes from the other end side of the first passage to the other side in the width direction;

a fourth connection portion protruding from the fourth passage to the other side in the width direction;

a fifth connection portion protruding downward from one end side of the third passage; and

a sixth connecting portion that protrudes upward from the other end side of the third passage.

2. The fuel branch adapter of claim 1,

the first connection portion protrudes from one end side of the first passage toward the prime mover side arranged on one side in the width direction,

the second connection portion protrudes rearward from the second passage and then is bent downward,

the third connecting portion protrudes from the other end side of the first passage toward the other side in the width direction,

the fourth connection portion protrudes from the fourth passage toward the other side in the width direction,

the fifth connecting portion protrudes downward from one end side of the third passage,

the sixth connecting portion protrudes upward from the other end side of the third passage and then is bent toward the other side in the width direction.

3. A working machine characterized in that it is provided with a fuel branch adapter according to claim 1 or 2.

4. The work machine of claim 3,

the work machine is provided with:

a fuel tank that accumulates the fuel;

a fuel supply path that supplies the fuel accumulated in the fuel tank to the motor;

a valve provided in a return path that returns the fuel discharged from the prime mover to the fuel supply path;

a fuel cooler that cools the fuel; and

a filter that removes foreign matter in the fuel supplied from the fuel tank to the prime mover,

the plurality of pipes includes a first pipe connecting the prime mover with the first connection portion, a second pipe connecting the second connection portion with the fuel cooler, a third pipe connecting the third connection portion with the valve, a fourth pipe connecting the filter with the fourth connection portion, a fifth pipe connecting the fuel cooler with the fifth connection portion, and a sixth pipe connecting the sixth connection portion with the fuel tank.

5. The fuel branch adapter of claim 1,

the fuel branch adapter has a grip portion that holds a tube material different from the tube material connected to the connection portion,

the clamping part comprises:

a first extension extending from the mounting portion;

a second extension extending from the first extension; and

a restraint portion secured to the second extension portion and holding the different tube.

6. The fuel branch adapter of claim 5,

the plurality of communication paths are branch paths that respectively communicate one connection portion with the other plurality of connection portions.

7. The fuel branch adapter of claim 5,

the plurality of pipes include an air removal pipe for removing air contained in the fuel.

8. A working machine comprising a fuel branch adapter according to any one of claims 5 to 7.

9. The work machine of claim 8,

the machine body has a base plate and a support bracket that is provided on the base plate and supports the prime mover,

the mounting portion is mounted to the support bracket.

10. The work machine of claim 9,

the work machine is provided with:

a hydraulic actuator; and

a hydraulic pump that discharges hydraulic oil supplied to the hydraulic actuator,

the support bracket supports a front portion of the prime mover,

at least a part of the fuel branch adapter is disposed between the support bracket and the hydraulic pump in the front-rear direction.

11. The work machine of claim 9,

the body has a reinforcing rib provided on an upper portion of the base plate and extending in a front-rear direction,

a fixing member is interposed between the support bracket and the prime mover,

the fuel branch adapter is disposed between the reinforcing rib and the fixing member in the vertical direction.

12. The work machine of claim 11,

at least a portion of the plurality of tubes is disposed to pass between the prime mover and the reinforcement rib.