JP2014005622A - Hybrid construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hybrid construction machine capable of suppressing the damage of a cable connecting a generator motor to hybrid equipment including a capacitor and a controller.SOLUTION: The hybrid construction machine includes: a pair of vertical plates 12A and 12B erected on an upper frame 11 so as to be extended to a longitudinal direction, and to be arranged in a lateral direction; a pair of back plates 14A and 14B respectively attached to the upper end faces of the pair of vertical plates 12A and 12B; at least one cable 24 configured to electrically connect a generator motor 19 to hybrid equipment 22; and at least one holding member 25 welded to a right side face 14b of the back plate 14A, and configured to hold the cable 24 in a state that a top face 14c of the back plate 14A is opened upward.

Description

  The present invention relates to a generator motor connected to an engine, a capacitor capable of storing electric power generated by the generator motor, and the generator motor to operate the generator motor by engine power or electric power of the capacitor. The present invention relates to a hybrid construction machine having a hybrid device including a controller for controlling driving.

  Conventionally, for example, a construction machine described in Patent Document 1 is known as the hybrid construction machine.

  A construction machine described in Patent Document 1 includes a motor generator connected to an engine, power storage means capable of storing electric power generated by the motor generator, an inverter circuit that controls driving of the motor generator, and a controller. I have.

  The motor generator is provided at the right rear portion of the revolving structure. The inverter circuit and the controller are provided at the right front portion of the swing body. The inverter circuit and controller and the motor generator are connected by an inverter side cable. The inverter side cable is routed along the bottom frame at a position close to the bottom frame of the revolving structure.

JP 2011-20833 A

  However, since the inverter side cable described in Patent Document 1 is routed in the vicinity of the bottom frame of the swing body, the inverter side cable is damaged when the swing body is pushed up from below during work of the construction machine. There is a risk.

  The objective of this invention is providing the hybrid construction machine which can suppress the failure | damage of the cable which connects a generator motor and the hybrid apparatus containing an electrical storage device and a controller.

  In order to solve the above-mentioned problems, the inventors of the present application routed the cable above the upper frame by holding the cable on a pair of vertical plates standing on the upper frame to support the work attachment. We focused on what we can do. As a result, the inventors of the present application have come up with an invention in which a holding member for holding a cable is welded to a back plate fixed to an upper end surface of a vertical plate.

  As shown in FIG. 6, the back plate 14A is attached to the upper end surface of the vertical plate 12A to reinforce the vertical plate 12A. Here, as shown in FIG. 6, it is conceivable to weld the holding member 25 to the upper surface 14c of the back plate 14A at the welding point M3. However, in this case, it is difficult to ensure the welding strength. is there. Specifically, since the back plate 14A extends in the front-rear direction along the vertical plate 12A, a direction in which the back plate 14A is bent in the vertical direction from the viewpoint of viewing the back plate 14A from the side along with vibration generated in the construction machine. Is generated in the back plate 14A. Thereby, the displacement amount of the upper surface 14c of the back plate 14A due to the vibration is large. Therefore, it is difficult to ensure the welding strength of the holding member to the upper surface 14c of the back plate 14A. Further, the upper surface 14c of the back plate 14A is used as a scaffold for workers or as a temporary storage place for equipment during the manufacture of the construction machine. Therefore, when a holding member is attached to the upper surface 14c of the back plate 14A, the cable may be damaged by being sandwiched between the upper surface 14c of the back plate 14A and the operator's feet or equipment.

  In order to solve these problems, the present invention is a hybrid construction machine, which is a lower traveling body, an upper frame provided on the lower traveling body, and extends in the front-rear direction and aligned in the left-right direction. A pair of vertical plates erected on the frame, a work attachment swingably supported on the front part of the pair of vertical plates, and a pair of back plates attached to the upper end surfaces of the pair of vertical plates, respectively And an engine provided on the upper frame, a generator motor provided on the upper frame and connected to the engine, a battery capable of storing electric power generated by the generator motor, and Including a controller for controlling the drive of the generator motor so as to operate the generator motor by the power of the engine or the electric power of the capacitor, and A hybrid device provided before the generator motor on the upper frame, at least one cable for electrically connecting the generator motor and the hybrid device, and one for holding one of the pair of back plates Hybrid construction comprising: at least one holding member that is welded to a side surface of the back plate and that holds the cable above the upper frame with the upper surface of the holding back plate open upward. Provide machines.

  In the present invention, the holding member is welded to the side surface of the holding back plate. Thereby, the welding strength of the holding member with respect to the back plate can be sufficiently ensured. Specifically, the amount of displacement due to the bending stress generated in the back plate due to vibration generated in the construction machine is smaller on the side surface of the back plate than on the upper surface of the back plate, so by welding the holding member to this side surface, Greater welding strength can be ensured than when the holding member is welded to the upper surface of the back plate.

  In addition, in the present invention, the cable is held above the upper frame in a state where the upper surface of the holding back plate is opened upward by the holding member. As a result, it is possible to hold the cable above the upper frame while avoiding the cable being pinched between the upper surface of the back plate and the operator's feet or equipment, thereby suppressing cable breakage more effectively. can do.

  Therefore, according to the present invention, breakage of the cable connecting the generator motor and the hybrid device can be effectively suppressed.

  In the hybrid construction machine, it is preferable that the holding member holds the cable at a position lower than an upper surface of the holding back plate.

  In this aspect, the cable is held at a position below the upper surface of the holding back plate. As a result, even if a worker's feet or equipment having an area larger than the upper surface of the holding back plate rests on the upper surface of the holding back plate, the worker's feet or equipment can contact the cable. Can be suppressed. Therefore, according to the said aspect, damage to a cable can be suppressed more reliably.

  In the hybrid construction machine, it is preferable that the holding member holds the cable at a position disengaged laterally from the holding back plate as viewed from above.

  In this aspect, the cable is held at a position deviated laterally from the holding back plate as viewed from above. As a result, the cable can be visually observed to the side of the holding back plate without disturbing the holding back plate from the viewpoint seen from above, so that the operation of checking the state of the cable or a specific cable can be found. Work efficiency can be improved.

  In the hybrid construction machine, it is preferable that the holding member holds the cable so that the cable can be attached to and detached from the holding back plate by an operation from above.

  In this aspect, the cable can be attached to and detached from the holding back plate by an operation from above. As a result, the cable can be easily attached and detached during assembly work or maintenance of the hybrid construction machine. For example, an operator who works using the back plate as a scaffold can attach and detach the cable from the top to the holding member at the foot.

  In the hybrid construction machine, a plurality of the cables are provided between the generator motor and the hybrid device, and the holding member holds the plurality of cables arranged in a line in the vertical direction. It is preferable.

  In this aspect, the holding member holds a plurality of cables arranged in a line in the vertical direction. As a result, the horizontal space for holding a plurality of cables can be reduced, so that a plurality of cables can be routed while ensuring a large degree of freedom in the layout of the devices on the upper frame. .

  The hybrid construction machine further includes a fuel tank disposed on a side of the holding back plate on the upper frame, and the holding member is provided in a gap between the fuel tank and the holding back plate. It is preferable to hold the plurality of cables in a state where they are arranged in a line in the vertical direction.

  In this aspect, a plurality of cables are held in a line in the vertical direction in the gap between the fuel tank and the holding back plate. Accordingly, the gap between the fuel tank and the holding back plate can be set narrower than in the case where a plurality of cables are held side by side in the horizontal direction. Therefore, it is possible to route a plurality of cables while reducing the size of the upper frame in the horizontal direction.

  Preferably, the hybrid construction machine further includes a fuel pipe that connects the fuel tank and the engine, and the holding member holds the cables at a position higher than the fuel pipe.

  In this aspect, each cable is held at a position higher than the fuel pipe by the holding member. Thereby, the possibility of a fire when the damage of both fuel piping and a cable is assumed can be reduced. Specifically, even if fuel leakage occurs due to damage to the fuel piping, the cable is disposed above the fuel piping, so contact between the damaged portion of the cable and the leaked fuel is not possible. It can be avoided. Therefore, according to the aspect, it is possible to hold a plurality of cables while reducing the possibility of a fire at the time of an abnormal abnormality while reducing the size of the upper frame in the horizontal direction.

  In the hybrid construction machine, the holding member is fixed to the holding back plate by welding, a detachable member that is detachable from the fixing member and holds the cable, and the fixing member. It is preferable to have a bolt that can be removably attached to the fixing member by being screwed onto the fixing member from above.

  According to this aspect, the detachable member can be attached to the fixing member by screwing the bolt with respect to the fixing member from above, and the detachable member is removed from the fixing member by pulling the bolt upward from the fixing member. Can do.

  ADVANTAGE OF THE INVENTION According to this invention, the failure | damage of the cable which connects a generator motor and a hybrid apparatus can be suppressed effectively.

It is a left view which shows the whole structure of the hybrid shovel which concerns on embodiment of this invention. It is a top view which abbreviate | omits and shows a part of upper revolving body shown in FIG. It is a top view which expands and shows a part of FIG. It is the IV-IV sectional view taken on the line of FIG. It is sectional drawing which expands and shows a part of FIG. FIG. 6 is a view corresponding to FIG. 5 showing a comparative example for the embodiment of the present invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In addition, the following embodiment is an example which actualized this invention, Comprising: The thing of the character which limits the technical scope of this invention is not.

  Referring to FIG. 1, a hybrid excavator 1 which is an example of a hybrid construction machine includes a lower traveling body 2 having a crawler 2a, an upper revolving body 3 provided on the lower traveling body 2 so as to be able to swivel, and an upper revolving body. 3 and a work attachment 4 attached to be undulating. In addition, it demonstrates below using the front-back direction, the up-down direction, and the left-right direction seen from the operator who seated in the cab 15 of the upper revolving structure 3. FIG.

  The work attachment 4 includes a boom 5 having a base end portion swingably attached to the upper swing body 3, an arm 6 having a base end portion swingably attached to the distal end portion of the boom 5, And a bucket 7 that is swingably attached to the tip of the arm 6. The work attachment 4 also swings the boom 5 with respect to the upper swing body 3, the arm cylinder 9 with which the arm 6 swings with respect to the boom 5, and the bucket 7 with respect to the arm 6. And a bucket cylinder 10 to be operated.

  Referring to FIGS. 2 and 3, the upper swing body 3 includes an upper frame 11 that is turnably mounted on the lower traveling body 2, and a pair of vertical plates 12 </ b> A and 12 </ b> B that are erected on the upper frame 11. A pair of back plates 14A and 14B attached to the upper end surfaces of the vertical plates 12A and 12B, a cab 15 provided at the left front portion of the upper frame 11, and an engine room behind the cab 15 on the upper frame 11, respectively. A partition plate 16 that divides R1, an engine 17 provided in the engine room R1, a hydraulic pump 18 and a generator motor 19 connected to the engine 17, and a hydraulic oil tank 20 provided in front of the generator motor 19, Fuel tank 21, hybrid device 22, fuel pipe 23 (see FIG. 3) connecting fuel tank 21 and engine 17, and generator motor A cable 24 (see FIG. 3) for electrically connecting the 9 and the hybrid device 22, and a three holding member 25 for holding the cable 24 (see FIG. 3).

  The pair of vertical plates 12A, 12B is provided at a substantially central position of the upper frame 11 so as to extend in the front-rear direction and to be aligned in the left-right direction. The base end portion of the boom 5 is disposed between the front portions of the vertical plates 12A and 12B, and is supported by the vertical plates 12A and 12B so as to be swingable about an axis along the left-right direction. Yes.

  The back plate 14A is for reinforcing the vertical plate 12A. Specifically, as shown in FIG. 4, the back plate 14A is welded to the upper end surface of the vertical plate 12A in a posture orthogonal to the vertical plate 12A. In other words, the vertical plate 12A is butt welded to a substantially central position in the left-right direction of the lower surface 14a of the back plate 14A. Similarly, the back plate 14B reinforces the vertical plate 12B. Since the back plate 14B has the same function as the back plate 14A, description of the back plate 14B is omitted.

  Each of the back plates 14A and 14B has a length that can be disposed on the side of the hydraulic oil tank 20 and the fuel tank (on the left side in the present embodiment) over the entire range of the hydraulic oil tank 20 and the fuel tank 21 in the front-rear direction. Have Although described later in detail, the cable 24 can be routed along the back plate 14A between the hydraulic oil tank 20 and the fuel tank 21 and the back plate 14A.

  2 and 3, the partition plate 16 is formed in a substantially L shape extending from the left edge portion of the upper frame 11 to the vicinity of the right vertical plate 12A and extending rearward therefrom.

  The engine 17 is arranged sideways so that its output shaft faces the right side.

  The hydraulic pump 18 operates by receiving power from the engine 17 to discharge hydraulic oil. Specifically, the hydraulic pump 18 supplies hydraulic oil to hydraulic actuators such as the boom cylinder 8, the arm cylinder 9, and the bucket cylinder 10, for example. The hydraulic pump 18 is disposed on the right side of the engine 17 and is connected to the output shaft of the engine 17.

  The generator motor 19 can operate as a generator by receiving power from the engine 17 and can operate as a motor by receiving electric power from a capacitor 22a described later. Specifically, the generator motor 19 is disposed on the right side of the hydraulic pump 18 and connected to the output shaft of the engine 17. More specifically, the generator motor 19 is provided in the device space S1 that is the right space of the two outer spaces in the left-right direction with respect to the vertical plates 12A and 12B on the upper frame 11.

  The hydraulic oil tank 20 is disposed in front of the hydraulic pump 18 and the generator motor 19 and behind the hybrid device 22 in the device space S1. The hydraulic oil tank 20 has a horizontally long planar shape that can be disposed in a range from the right edge of the upper frame 11 to the right back plate 14A.

  The fuel tank 21 is disposed on the side of the back plate 14 </ b> A (on the right side) on the upper frame 11. Specifically, the fuel tank 21 is disposed in front of the hydraulic oil tank 20 and behind the hybrid device 22 in the device space S1. The fuel tank 21 has a horizontally long planar shape that can be disposed in a range from the right edge of the upper frame 11 to the right back plate 14A.

  The hybrid device 22 is arranged side by side with the generator motor 19 in the front-rear direction in the device space S1. Specifically, the hybrid device 22 according to the present embodiment is disposed in front of the fuel tank 21, that is, in front of the generator motor 19. In addition, the hybrid device 22 controls the driving of the generator motor 19 so that the power generator 22 can be operated by the power of the engine 17 or the power of the capacitor 22a, and the battery 22a that can store the power generated by the generator motor 19. And a container 22b. The controller 22b can be realized by a configuration including an inverter, for example.

  The fuel pipe 23 is led from the fuel tank 21 to the left side, and then led rearward along the right vertical plate 12 </ b> A. More specifically, as shown in FIG. 4, the middle portion of the fuel pipe 23 is routed along the vertical plate 12A at a position covered by the back plate 14A from the viewpoint seen from above. In the present embodiment, two fuel pipes 23 are provided.

  2 and 3, the cable 24 is led from the hybrid device 22 to the left side, and then led rearward along the right back plate 14A, from which the hydraulic oil tank 20, the hydraulic pump 18, and the power generation are generated. The electric motor 19 is led rightward and connected to the generator motor 19. A portion of the cable 24 that is routed along the back plate 14 </ b> A is held by each holding member 25. In this embodiment, as shown in FIG. 4, three cables 24 are provided. Each of the three cables 24 is a cable for transmitting three-layer AC power.

  As shown in FIG. 3, the three holding members 25 are arranged in a line in the vertical direction as shown in FIG. 4 in the clearance C1 between the hydraulic oil tank 20 and the fuel tank 21 and the back plate 14A. Keep them side by side. Accordingly, it is possible to effectively hold the three cables 24 along the back plate 14A while setting the gap C1 between the hydraulic oil tank 20 and the fuel tank 21 and the back plate 14A small. In addition, since each holding member 25 has the same structure, respectively, the holding member 25 arrange | positioned in the forefront of FIG. 3 is demonstrated, and description of the other holding member 25 is abbreviate | omitted.

  As shown in FIGS. 3 to 5, the holding member 25 is a right side surface 14b facing the device space S1 side of the back plate 14A (holding back plate) closer to the device space S1 of the pair of back plates 14A and 14B. It is welded to. The holding member 25 holds each cable 24 so that each cable 24 can be attached to and detached from the back plate 14A by an operation from above. Specifically, the holding member 25 includes a fixing member 26 fixed to the back plate 14A, an attaching / detaching member 27 that can be attached to and detached from the fixing member 26, and that holds each cable 24, and the fixing member 26 from above. A bolt 28 is provided that can be detachably attached to the fixing member 26 by screwing.

  The fixing member 26 is a member in which a female screw 26a capable of screwing the bolt 28 is formed. The fixing member 26 can be configured by, for example, a nut (so-called high nut) extending in a predetermined direction. Further, the fixing member 26 is welded to the right side surface 14b of the back plate 14A at the welding locations M1 and M2 shown in FIG. 3 in a posture in which the female screw 26a is aligned in the vertical direction. Specifically, the front side surface of the fixing member 26 is welded to the right side surface 14b of the back plate 14A by a welding point M1. Further, the rear side surface of the fixing member 26 is welded to the right side surface 14b of the back plate 14A by a welding point M2. And since the internal thread 26a is arrange | positioned along the up-down direction, the volt | bolt 28 can be screwed with respect to the fixing member 26 from the top.

  The detachable member 27 is attached to the fixing member 26 and holds the cables 24 above the upper frame 11 with the upper surface 14c of the back plate 14A opened upward. The detachable member 27 according to the present embodiment holds each cable 24 at a position below the upper surface 14c of the back plate 14A while being attached to the fixing member 26. In addition, the detachable member 27 is attached to the fixing member 26, and holds each cable 24 at a position (a position on the right side of the back plate 14A) that is laterally removed from the back plate 14A as viewed from above. Further, the detachable member 27 is attached to the fixing member 26 and holds the cables 24 in a line in the vertical direction. Furthermore, as shown in FIG. 4, the detachable member 27 holds each cable 24 at a position higher than the fuel pipe 23 while being attached to the fixing member 26. Hereinafter, the configuration of the detachable member 27 will be described.

  The detachable member 27 includes a holding portion 27 a that holds each cable 24 and an attachment portion 27 b that is attached to the fixing member 26. The detachable member 27 according to the present embodiment is configured by folding one metal plate in half so as to form a gap for holding the three cables 24 arranged in one row. . The holding part 27a can attach and detach each cable 24 by unfolding the metal plate folded in half. Further, the length of the holding portion 27a is set so that each cable 24 is held at a position higher than the fuel pipe 23 in a state where the detachable member 27 is attached to the fixing member 26 as shown in FIG. Yes. The attachment portion 27b is a portion bent at an angle of about 90 ° with respect to the holding portion 27a. The mounting portion 27b is formed with a mounting hole 27c through which the bolt 28 can be inserted. As shown in FIG. 5, with the holding portion 27a disposed on the right side of the back plate 14A, the attachment portion 27b is attached to the upper surface of the fixing member 26, so that the upper surface 14c of the back plate 14A is opened upward. Each cable 24 is held by the back plate 14A. Specifically, the cables 24 are held in a line in the vertical direction at a position on the right side of the right side surface 14b of the back plate 14A.

  As described above, in the embodiment, the holding member 25 is welded to the right side surface 14b of the back plate 14A. Thereby, the welding strength of the holding member 25 to the back plate 14A can be sufficiently ensured.

  Specifically, since the back plate 14A extends in the front-rear direction along the vertical plate 12A, the back plate 14A is bent in the vertical direction from the viewpoint of viewing the back plate 14A from the side along with the vibration generated in the hybrid excavator 1. Directional stress is generated in the back plate 14A. Thereby, the amount of displacement of the upper surface 14c of the back plate 14A due to the vibration increases. Therefore, as shown in FIG. 6, when the holding member 25 is welded to the upper surface 14c of the back plate 14A at the welding point M3, it is difficult to ensure the welding strength. The displacement due to the bending stress generated in the back plate 14A due to the vibration generated in the hybrid excavator 1 is smaller on the right side surface 14b of the back plate 14A than on the upper surface 14c of the back plate 14A. By welding the holding member 25, a larger welding strength can be ensured than when the holding member 25 is welded to the upper surface 14c of the back plate 14A.

  In addition, in the above embodiment, the cable 24 is held above the upper frame 11 with the holding member 25 opening the upper surface 14c of the back plate 14A upward. Accordingly, the cables 24 can be held above the upper frame 11 while avoiding the cables 24 being sandwiched between the upper surface 14c of the back plate 14A and the feet or equipment of the worker. Can be more effectively suppressed.

  Therefore, according to the embodiment, the breakage of the cable 24 connecting the generator motor 19 and the hybrid device 22 can be effectively suppressed.

  In the embodiment, each cable 24 is held at a position below the upper surface of the back plate 14A. Thus, even if a worker's foot or device having an area larger than the upper surface of the back plate 14A is placed on the upper surface of the back plate 14A, the worker's foot or device is in contact with each cable 24. Can be suppressed. Therefore, according to the said embodiment, damage to the cable 24 can be suppressed more reliably.

  In the above-described embodiment, each cable 24 is held at a position deviated from the back plate 14A to the side (right side) from the viewpoint seen from above. Thereby, from the viewpoint seen from the top, each cable 24 can be visually observed to the side of the back plate 14A without the back plate 14A getting in the way. The efficiency of the work of searching for 24 can be achieved.

  In the above-described embodiment, the holding member 25 that holds each cable 24 at a position that is laterally disengaged from the back plate 14A as viewed from above has been described. However, the position at which each cable 24 is held is limited to this. Not. The holding position of each cable 24 by the holding member 25 can be set as appropriate as long as the upper surface of the back plate 14A is opened upward. For example, the holding member 25 may hold each cable 24 at a position below the back plate 14A or a position protruding to the opposite side (left side) of the device space S1 with respect to the back plate 14A.

  In the embodiment, the cable 24 can be attached to and detached from the back plate 14A by an operation from above. Thereby, the attachment / detachment work of the cable 24 becomes easy during the assembly work or maintenance of the hybrid excavator 1. For example, a worker who works using the back plates 14A and 14B as a scaffold can attach and detach the cable 24 to and from the holding member 25 at the foot.

  In the embodiment, the holding member 25 holds the plurality of cables 24 in a state where they are arranged in a line in the vertical direction. As a result, the horizontal space for holding the plurality of cables 24 can be reduced, so that the plurality of cables 24 are routed while ensuring a large degree of freedom in the layout of the devices on the upper frame 11. be able to.

  In the embodiment, a plurality of cables 24 are held in a line in the vertical direction in the gap between the fuel tank 21 and the back plate 14A. Accordingly, the gap between the fuel tank 21 and the back plate 14A can be set narrower than in the case where a plurality of cables 24 are held in the horizontal direction. Therefore, it is possible to route a plurality of cables 24 while reducing the size of the upper frame 11 in the horizontal direction.

  In the embodiment, each cable 24 is held at a position higher than the fuel pipe 23 by the holding member 25. Thereby, the possibility of a fire when the damage of both the fuel piping 23 and the cable 24 is assumed can be reduced. Specifically, even if the fuel pipe 23 is damaged and fuel leaks, the cable 24 is disposed above the fuel pipe 23, so the damaged portion of the cable 24 and the leaked fuel Can be avoided. Therefore, according to the embodiment, it is possible to hold the plurality of cables 24 while reducing the possibility of fire at the time of an abnormal abnormality while reducing the size of the upper frame 11 in the horizontal direction.

  In the above-described embodiment, the plurality of cables 24 are held in a line in the vertical direction in the gap C1 between the fuel tank 21, the hydraulic oil tank 20, and the back plate 14A by the plurality of holding members 25. . Accordingly, the gap C1 between the fuel tank 21, the hydraulic oil tank 20, and the back plate 14A can be set narrower than in the case where the plurality of cables 24 are held in the horizontal direction. Further, the cables 24 can be held along the back plate 14A by the plurality of holding members 25, and the cables 24 can be routed so as to bypass the fuel tank 21 and the hydraulic oil tank 20 together. . Therefore, a plurality of cables 24 can be efficiently routed while the size of the upper frame 11 is reduced in the horizontal direction.

  In the embodiment, the holding member 25 includes the fixing member 26, the detachable member 27, and the bolt 28. Accordingly, the detachable member 27 can be attached to the fixing member 26 by screwing the bolt 28 from above with the fixing member 26, and the detachable member 27 is fixed by removing the bolt 28 from the fixing member 26. It can be removed from the member 26.

  In addition, although the said embodiment demonstrated the example in which the hybrid apparatus was provided in apparatus space S1 in which the generator motor 19 was provided, arrangement | positioning of the hybrid apparatus 22 is not limited to this. For example, when the generator motor 19 is provided behind the cab 15, that is, the device space S1 may be formed on the left side of the vertical plate 12B. Even in this case, the hybrid device 22 is provided on the opposite side of the cab 15 with respect to the vertical plates 12A and 12B.

  Moreover, although the said embodiment demonstrated the holding member 25 welded to the backplate 14A close | similar to apparatus space S1, you may weld the holding member 25 to the backplate 14B. Furthermore, the welding position of the holding member 25 can select at least one side surface from both side surfaces of the back plates 14A and 14B in the left-right direction.

  Furthermore, in the said embodiment, although the three holding members 25 are disclosed, it is sufficient if at least one holding member 25 is provided. By holding the cable 24 above the upper frame 11 by the at least one holding member 25, the cable 24 can be prevented from being damaged due to the upper frame 11 being pushed up from below.

  In the embodiment, each holding member 25 holds three cables 24, but the holding member 25 may hold at least one cable 24. Here, since the cable 24 that should ensure the distance from the fuel pipe 23 is a cable that constitutes a power line to which a high voltage is applied, the at least one cable 24 is a cable that constitutes a power line. It is preferable.

  Furthermore, although the said embodiment demonstrated the structure in which the cab 15 was arrange | positioned at the left front part of the upper frame 11, the cab 15 may be provided in the right front part of the upper frame 11. FIG. In this case, the device space S1 is set on the left side of each of the vertical plates 12A and 12B.

C1 Clearance between fuel tank and holding back plate S1 Equipment space 1 Hybrid excavator (hybrid construction machine)
DESCRIPTION OF SYMBOLS 2 Lower traveling body 4 Work attachment 11 Upper frame 12A, 12B Vertical plate 14A, 14B Back plate 14b Right side surface 17 Engine 18 Hydraulic pump 19 Generator motor 20 Hydraulic oil tank 21 Fuel tank 22 Hybrid equipment 22a Electric storage device 22b Controller 23 Fuel piping 24 Cable 25 Holding member 26 Fixing member 27 Detachable member 28 Bolt

Claims (8)

A hybrid construction machine,
A lower traveling body,
An upper frame provided on the lower traveling body;
A pair of vertical plates standing on the upper frame so as to extend in the front-rear direction and line up in the left-right direction;
A work attachment swingably supported at the front part of the pair of vertical plates;
A pair of back plates respectively attached to the upper end surfaces of the pair of vertical plates;
An engine provided on the upper frame;
A generator motor provided on the upper frame and connected to the engine;
A capacitor that can store the electric power generated by the generator motor, and a controller that controls the drive of the generator motor so as to operate the generator motor by the power of the engine or the electric power of the capacitor, and the upper A hybrid device provided before the generator motor on the frame;
At least one cable for electrically connecting the generator motor and the hybrid device;
At least one for holding the cable above the upper frame with the upper surface of the holding back plate open upward while being welded to the side surface of one holding back plate of the pair of back plates. A hybrid construction machine comprising two holding members.   The hybrid construction machine according to claim 1, wherein the holding member holds the cable at a position below an upper surface of the holding back plate.   The hybrid construction machine according to claim 1 or 2, wherein the holding member holds the cable at a position deviated laterally from the holding back plate as viewed from above.   The hybrid construction machine according to any one of claims 1 to 3, wherein the holding member holds the cable so that the cable can be attached to and detached from the holding back plate by an operation from above. A plurality of the cables are provided between the generator motor and the hybrid device,
The hybrid construction machine according to any one of claims 1 to 4, wherein the holding member holds the plurality of cables in a state where they are arranged in a line in the vertical direction. A fuel tank disposed on a side of the holding back plate on the upper frame;
6. The hybrid construction machine according to claim 5, wherein the holding member holds the plurality of cables arranged in a line in the vertical direction in a gap between the fuel tank and the holding back plate. A fuel pipe connecting the fuel tank and the engine;
The hybrid construction machine according to claim 6, wherein the holding member holds the cables at a position higher than the fuel pipe.   The holding member includes a fixing member fixed to the holding back plate by welding, a detachable member that can be attached to and detached from the fixing member, and that holds the cable, and is screwed onto the fixing member from above. The hybrid construction machine according to claim 4, further comprising: a bolt that can be removably attached to the fixing member by joining together.

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