JP2015221980A - Casing and hybrid construction machine with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress vibrations of a casing that houses a heavy object, and to make the casing compact.SOLUTION: A casing 93 is for storing a capacitor 92 that is a heavy object, and comprises: an antivibration member 96 fixed on a bottom wall 93a of the casing 93 and also on a vehicle body frame 99, the antivibration member supporting the casing 93 in relation to the vehicle body frame 99; and a raising bracket 94 installed on the bottom wall 93a of the casing 93, the raising bracket supporting the capacitor 92 at a prescribed height and forming a raised space 95 between an undersurface of the capacitor 92 and the bottom wall 93a of the casing 93. The antivibration member 96 is partially installed inside the raised space 95.

Description

  The present invention relates to a casing for storing a heavy object and a hybrid construction machine including the casing.

  Patent Document 1 discloses a hybrid construction machine including a casing that accommodates a heavy battery. This casing is fixed to the body frame.

JP 2012-172332 A

  When a casing for storing a heavy object such as a capacitor is fixed to a vehicle body frame, it is necessary to attach a vibration isolation member to suppress vibration transmitted from the vehicle body frame. However, if the vibration isolating member is simply provided in the casing, the casing becomes large and the mountability may be deteriorated.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to suppress the vibration of a casing that houses a heavy object and to make the casing compact.

  The present invention is a casing for storing a heavy object, and is fixed to a bottom wall of the casing and fixed to an installation surface, and a vibration isolating member that supports the casing with respect to the installation surface; A raised bracket provided on the bottom wall and configured to support the heavy object at a predetermined height and form a raised space between a lower surface of the heavy object and the bottom wall of the casing; A part of the vibration member is arranged in the raised space.

  According to the present invention, a heavy object is raised and accommodated in the casing, and a part of the vibration isolating member that supports the casing is disposed in a space below the heavy object secured by the raising, so that the heavy object As a result, the casing can be made compact.

1 is a schematic configuration diagram of a hybrid construction machine according to an embodiment of the present invention. It is sectional drawing of the casing which concerns on embodiment of this invention. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing of the modification 1 of the casing which concerns on embodiment of this invention. It is sectional drawing of the modification 2 of the casing which concerns on embodiment of this invention.

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

  First, a hybrid construction machine 100 according to an embodiment of the present invention will be described with reference to FIG.

  The operation of the hybrid construction machine 100 is controlled by the fluid pressure control system 101. For example, the fluid pressure control system 101 is a device that controls the operation of each actuator that drives the excavation attachment of a hydraulic excavator. Below, the case where the fluid pressure control system 101 controls the expansion / contraction operation | movement of the boom cylinder 10 which drives the boom 1 (load) of a hydraulic shovel is demonstrated.

  The fluid pressure control system 101 includes a boom cylinder 10 as an actuator and a main pump 21 as a fluid pressure pump that supplies hydraulic oil (working fluid) to the boom cylinder 10. The fluid pressure control system 101 further includes a pilot pump 22, a main control valve 30, a main passage 23, a first passage 41, a second passage 42, and a main controller 50.

  The interior of the boom cylinder 10 is partitioned into a rod-side pressure chamber 11 and a bottom-side pressure chamber 12 by a piston 13a that slidably moves within the boom cylinder 10. The boom 1 is connected to the other end of the piston rod 13b whose one end is coupled to the piston 13a.

  The main pump 21 and the pilot pump 22 are hydraulic supply sources that discharge hydraulic oil, and are variable displacement pumps that can adjust the inclination angle of the swash plate. The main pump 21 and the pilot pump 22 are driven by the engine 8 as a prime mover mounted on the hybrid construction machine. The engine 8 is provided with a rotational speed sensor 9 as a rotational speed detector that detects the rotational speed of the engine 8.

  The inclination angle of the swash plate of the main pump 21 is controlled by the inclination angle controller 20. The tilt angle controller 20 is controlled by the main controller 50. By controlling the inclination angle of the swash plate of the main pump 21, the capacity of the main pump 21 changes, and the maximum value of the flow rate of hydraulic oil that can be discharged by the main pump 21 changes.

  The hydraulic oil discharged from the main pump 21 is supplied to the main control valve 30 through the main passage 23. Thus, the main pump 21 and the main control valve 30 are connected by the main passage 23. In addition to the hydraulic oil discharged from the main pump 21, the hydraulic oil discharged from the assist pump 61 of the assist regeneration system 102 is guided to the main passage 23 through the assist passage 62. In addition, a first regeneration passage 75 is connected to the main passage 23, and hydraulic oil discharged from the main pump 21 is supplied to the regeneration motor 71 of the assist regeneration system 102 through the first regeneration passage 75.

  The main control valve 30 and the rod side pressure chamber 11 of the boom cylinder 10 are connected by a first passage 41, and the main control valve 30 and the bottom side pressure chamber 12 of the boom cylinder 10 are connected by a second passage 42. The second passage 42 is connected to a second regenerative passage 72 into which a part of the hydraulic oil discharged from the bottom side pressure chamber 12 flows. The hydraulic oil that has flowed into the second regeneration passage 72 is supplied to the regeneration motor 71 of the assist regeneration system 102.

  The main control valve 30 switches supply and discharge of hydraulic oil to and from the boom cylinder 10. The main control valve 30 is operated by the pilot pressure of hydraulic oil supplied from the pilot pump 22 to the pilot chambers 31 and 32 through the pilot valve 24 as the crew of the excavator manually operates the operation lever.

  When the pilot pressure is supplied to the pilot chamber 31, the main control valve 30 is switched to the position a. As a result, the hydraulic oil discharged from the main pump 21 is supplied to the rod-side pressure chamber 11 through the first passage 41, and the hydraulic oil in the bottom-side pressure chamber 12 is discharged to the tank T through the second passage 42. As a result, the piston rod 13 in the boom cylinder 10 moves downward in FIG. 1, the boom cylinder 10 contracts, and the boom 1 descends.

  When the pilot pressure is supplied to the pilot chamber 32, the main control valve 30 is switched to the position b. As a result, the hydraulic oil discharged from the main pump 21 is supplied to the bottom side pressure chamber 12 through the second passage 42, and the hydraulic oil in the rod side pressure chamber 11 is discharged to the tank T through the first passage 41. As a result, the piston rod 13 in the boom cylinder 10 moves upward in FIG. 1, the boom cylinder 10 extends, and the boom 1 rises.

  On the other hand, when the pilot pressure is not supplied to the pilot chambers 31 and 32, the main control valve 30 is switched to the position c. Thereby, the supply and discharge of the hydraulic oil to and from the boom cylinder 10 is blocked. As a result, the expansion and contraction of the boom cylinder 10 stops, and the boom 1 is held at a predetermined position.

  Thus, the main control valve 30 has three switching positions: a contracted position a for contracting the boom cylinder 10, an extended position b for extending the boom cylinder 10, and a cutoff position c for holding the load of the boom cylinder 10. ing.

  The fluid pressure control system 101 further includes an assist regeneration system 102. The assist regeneration system 102 regenerates the hydraulic oil discharged from the main pump 21 or the hydraulic oil discharged from the bottom-side pressure chamber 12 when the boom cylinder 10 is contracted, and regenerates the boom cylinder 10. And assist control for applying assisting force during operation.

  The assist regeneration system 102 includes a regeneration motor 71, a motor generator 81, a power storage device 91, an inverter 82, an assist pump 61, a first regeneration passage 75, a second regeneration passage 72, and an assist passage 62. Prepare.

  Motor generator 81 is a rotating electrical machine having a function as an electric motor that rotates electric power of power storage device 91 to drive assist pump 61 and a function as a generator that generates electric power by rotation of regenerative motor 71. .

  The motor generator 81, the regenerative motor 71, and the assist pump 61 rotate coaxially. When the rotation shaft of the motor generator 81 rotates, the rotation shafts of the regenerative motor 71 and the assist pump 61 rotate in conjunction with each other. Similarly, when the rotating shaft of the regenerative motor 71 rotates, the rotating shafts of the motor generator 81 and the assist pump 61 rotate together.

  The regenerative motor 71 is a variable capacity motor capable of controlling the output torque by controlling the inclination angle of the swash plate. The regenerative motor 71 is driven by hydraulic oil discharged from the main pump 21 and supplied through the first regenerative passage 75 or hydraulic oil discharged from the bottom pressure chamber 12 of the boom cylinder 10 and supplied through the second regenerative passage 72. Is done. The inclination angle of the swash plate of the regenerative motor 71 is controlled by an inclination angle controller 73. The tilt angle controller 73 is controlled by the main controller 50. By controlling the inclination angle of the swash plate of the regenerative motor 71, the capacity of the regenerative motor 71 changes, and the maximum value of the torque that can be generated by the regenerative motor 71 changes.

  The first regenerative passage 75 is provided with a first switching valve 76 that switches between supply and stop of hydraulic oil to the regenerative motor 71. The first switching valve 76 is an electromagnetic valve having a communication position f for supplying hydraulic oil from the main pump 21 to the regenerative motor 71 and a cutoff position g for stopping the supply of hydraulic oil to the regenerative motor 71. The position is switched by the controller 50.

  The second regeneration passage 72 is provided with a second switching valve 74 that switches between supply and stop of hydraulic oil to the regeneration motor 71. The second switching valve 74 has a communication position d for supplying hydraulic oil from the bottom pressure chamber 12 of the boom cylinder 10 to the regenerative motor 71 and a blocking position e for stopping the supply of hydraulic oil to the regenerative motor 71. It is a solenoid valve, and its position is switched by the main controller 50.

  The assist pump 61 is a variable displacement pump that can adjust the inclination angle of the swash plate. The assist pump 61 is driven by the motor generator 81 and supplies hydraulic oil to the main passage 23 through the assist passage 62. The inclination angle of the swash plate of the assist pump 61 is controlled by an inclination angle controller 63. The tilt angle controller 63 is controlled by the main controller 50. By controlling the inclination angle of the swash plate of the assist pump 61, the capacity of the assist pump 61 changes, and the maximum value of the flow rate of hydraulic oil that can be discharged by the assist pump 61 changes.

  The assist passage 62 is provided with a third switching valve 64 that switches between supply and stop of hydraulic oil to the main passage 23. The third switching valve 64 is an electromagnetic valve having a communication position h for supplying hydraulic oil from the assist pump 61 to the main passage 23 and a cutoff position i for stopping the supply of hydraulic oil to the main passage 23. The position is switched by the controller 50. In the present embodiment, the third switching valve 64 is provided in the assist passage 62, but instead, an electromagnetic proportional throttle valve whose opening degree is controlled by the main controller 50 and a downstream thereof, the assist pump 61 is provided. And a check valve that allows only the flow of hydraulic oil from the main pump 21 to the main pump 21.

  Motor generator 81 is connected to power storage device 92 of power storage device 91 via inverter 82.

  The inverter 82 is controlled by the inverter controller 51 and converts direct current into alternating current or alternating current into direct current. When motor generator 81 functions as an electric motor, DC power output from power storage device 91 is converted into three-phase AC power having an arbitrary frequency in inverter 82 and supplied to motor generator 81. On the other hand, when motor generator 81 is caused to function as a generator, three-phase AC power output from motor generator 81 is converted into DC power in inverter 82 and supplied to power storage device 91.

  The inverter controller 51 is connected to the main controller 50 and performs CAN (Controller Area Network) communication with the main controller 50. The inverter controller 51 controls the inverter 82 according to the instruction transmitted from the main controller 50 and transmits the status information of the inverter 82 to the main controller 50.

  Next, the power storage device 91 will be described with reference to FIGS. FIG. 2 is a cross-sectional view in which the power storage device 91 is cut in the vertical direction in the longitudinal direction, but the cross section of the battery 92 is omitted. 3 is a cross-sectional view taken along line III-III in FIG.

  The power storage device 91 includes a power storage 92 that can be charged and discharged, and a casing 93 that houses the power storage 92 that is a heavy object. The power storage device 91 is connected to a power storage controller 52 that monitors the state of charge of the battery 92.

  The battery 92 is a secondary battery such as a lithium ion battery or a nickel metal hydride battery. The capacitor 92 may be a single unit or a unit in which a large number of cells are connected in series. Note that the battery 92 is not limited to a secondary battery, and a battery that charges and discharges electric energy by electrostatic capacity, such as an electric double layer capacitor or a lithium ion capacitor, may be used.

  The casing 93 is a hexahedral box-shaped container having a bottom wall 93a, a side wall 93b, and a top wall 93c. The casing 93 is provided on the bottom wall 93a in the casing 93 and has a raised bracket 94 that supports the capacitor 92 at a predetermined height. An anti-vibration member 96 that is fixed to the bottom wall 93a of the casing 93 and supports the anti-vibration of the casing 93.

  The raising bracket 94 is a steel material having a substantially U-shaped cross section, and has a flat portion on which the battery 92 is placed above. The raising bracket 94 is fixed to the bottom wall 93a of the casing 93 by welding or the like. Since the battery 92 is supported at a height away from the bottom wall 93a of the casing 93 by the raised bracket 94, a raised space 95 is formed between the lower surface of the battery 92 and the bottom wall 93a of the casing 93. Is done. The raised space 95 is a space required to fix the vibration isolator member 96 to the bottom wall 93 a of the casing 93. That is, the height of the raised bracket 94 is set so that the vibration isolation member 96 fixed to the bottom wall 93a does not interfere with the battery 92. The raising bracket 94 is not limited to a U-shaped steel material, and may have any shape as long as it has a shape on which the battery 92 can be placed.

  The vibration isolation member 96 includes a pair of rubber portions 96a that sandwich the bottom wall 93a from above and below, a hollow cylindrical metal tube 96f that is inserted and fixed in the rubber portion 96a, and a hole formed in the center. An illustration is shown in which the rubber plate 96a is fixed to the vehicle body frame 99, which is the installation surface of the casing 93, through the disk plate 97 disposed in contact with the hole, the hole of the disk plate 97, and the hollow portion of the metal tube 96f. And a bolt that does not. In the present embodiment, the vibration isolation member 96 is located between the two raised brackets 94 and is disposed at the four corners of the bottom wall 93a.

  The rubber portion 96a is an elastic body formed of an elastic material such as rubber, and has a large diameter portion 96b, a small diameter portion 96c that protrudes from the large diameter portion 96b and has a smaller diameter than the large diameter portion 96b, and a large diameter. An annular shoulder surface 96d formed between the diameter portion 96b and the small diameter portion 96c, and a through hole 96e provided over the large diameter portion 96b and the small diameter portion 96c and through which the metal tube 96f is inserted and fixed. Have. The small diameter portion 96c has an outer diameter that can be fitted into a bottom wall 93a and a through hole 93d formed in a spacer member 98 described later. The shoulder surface 96d sandwiches the bottom wall 93a and the spacer member 98 together with the shoulder surface 96d of the other rubber portion 96a facing when the small diameter portion 96c is fitted into the through hole 93d.

  The spacer member 98 is fixed to the lower surface of the bottom wall 93a by welding or the like, complements the thickness of the bottom wall 93a sandwiched between the pair of rubber portions 96a, and reinforces the bottom wall 93a around the through hole 93d. To do. The spacer member 98 extends to below the raised bracket 94 and reinforces the bottom wall 93a of the portion to which the raised bracket 94 is fixed by welding. If the bottom wall 93a has a sufficient thickness, the spacer member 98 may not be provided.

  Next, a procedure for assembling the vibration-proof member 96 to the casing 93 and a procedure for fixing the casing 93 to the vehicle body frame 99 will be described. First, the small diameter portions 96c of the pair of rubber portions 96a are respectively fitted into the through holes 93d formed in the bottom wall 93a and the spacer member 98 from above and below the bottom wall 93a. The distal end surfaces of the inserted small-diameter portions 96c are in contact with each other in the through hole 93d. At the same time, the bottom wall 93a and the spacer member 98 are sandwiched between the shoulder surfaces 96d of the rubber portions 96a facing each other. Next, the metal cylinder 96f is inserted and fixed in the through hole 96e of the rubber part 96a. Subsequently, a bolt (not shown) is inserted into the hollow portion of the metal cylinder 96f from above through the disc plate 97. By coupling this bolt and a nut member (not shown) provided on the vehicle body frame 99, the vibration isolation member 96 is fixed to the bottom surface 93 a of the casing 93 and is also fixed to the vehicle body frame 99 which is the installation surface of the casing 93. . As a result, the casing 93 is supported on the vehicle body frame 99 by vibration isolation via the rubber portion 96 a of the vibration isolation member 96. The metal cylinder 96f is not limited to the above configuration, and may be inserted and fixed in advance in each rubber portion 96a. Alternatively, a stud bolt may be provided on the vehicle body frame 99 side, a nut member may be provided on the disk plate 97 side, and the casing 93 may be fixed to the vehicle body frame 99 by combining them.

  Usually, when the casing is supported on the casing installation surface by means of vibration isolation via the vibration isolation member, it is necessary to add a bracket for installing the vibration isolation member in the lateral direction or downward direction of the casing. However, when a bracket is added, the casing is enlarged in the lateral direction and the downward direction, so that the mountability is deteriorated and the manufacturing cost of the casing is increased. On the other hand, in this embodiment, as shown in FIGS. 2 and 3, the capacitor 92, which is a heavy object accommodated in the casing 93, is raised and arranged, and the inside of the raised space 95 formed by raising is increased. A part of the vibration isolating member 96 is disposed on the surface. Specifically, the rubber portion 96 a, the metal cylinder 96 f, the disc plate 97, and a part of the bolt that are fitted into the through hole 93 d from above are disposed in the raised space 95. Thus, in this embodiment, since the vibration-proof member 96 can be provided in the casing 93 without adding a bracket, the casing 93 can be made compact.

  Next, a modified example of the arrangement of the vibration isolation member 96 will be described. In the first modification shown in FIG. 4, the vibration isolation member 96 is disposed between the raised bracket 94 and the side wall 93 b of the casing 93. Since the vibration isolation member 96 is disposed at a position away from the center of gravity of the capacitor 92, which is a heavy object, the vibration isolation performance can be improved.

  In the second modification shown in FIG. 5, the vibration isolation member 96 is disposed inside the raised bracket 94. In this case, a tool hole (not shown) is provided on the upper surface of the raised bracket 94 in order to tighten a bolt for fixing the vibration isolation member 96. Since the vibration isolation member 96 is arranged in a dead space inside the raising bracket 94, the other raising space 95 can be effectively used for arranging other devices related to the power storage device 91 and the like.

  The anti-vibration member 96 may be additionally arranged near the center as well as the four corners of the bottom wall 93a. As long as a part of the vibration isolation member 96 is disposed in the raised space 95, the number and position of the vibration isolation members 96 can be freely set. Further, the vibration isolating member 96 is not limited to the one having the above configuration, and is fixed to the bottom wall 93a of the casing 93 and fixed to the vehicle body frame 99, and the casing 93 is attached to the vehicle body frame 99 via an elastic member such as rubber. As long as it can support vibration isolation, it may have any configuration.

  The power storage controller 52 performs CAN communication with the main controller 50 in the same manner as the inverter controller 51. The power storage controller 52 controls an electronic device (not shown) disposed in the casing 93 according to an instruction transmitted from the main controller 50 and transmits state information of the power storage device 91, for example, a charge state of the battery 92 to the main controller 50. To do.

  Next, the operation of the fluid pressure control system 101 of the hybrid construction machine will be described with reference to FIG.

  First, regenerative control by the assist regenerative system 102 performed as necessary when the boom 1 is lowered will be described.

  When a lever operation for contracting the boom cylinder 10 is performed by a crew member of the hydraulic excavator, the main control valve 30 is switched to the contracted position a. As a result, the hydraulic oil is supplied to the rod side pressure chamber 11 of the boom cylinder 10 and the hydraulic oil is discharged from the bottom side pressure chamber 12.

  At this time, when the power storage device 91 is in a chargeable state, the second switching valve 74 is switched to the communication position d, and a part of the hydraulic oil discharged from the bottom side pressure chamber 12 passes through the second regeneration passage 72. The regenerative motor 71 is supplied. At the same time, the inclination angle of the swash plate of the assist pump 61 is controlled so that the capacity of the assist pump 61 is minimized.

  Thus, since motor generator 81 rotates in synchronization with regenerative motor 71, motor generator 81 generates power and charges power storage device 91. That is, the hydraulic energy of the hydraulic oil discharged from the boom cylinder 10 is converted into electric energy.

  On the other hand, when the power storage device 91 is in a fully charged state and not in a chargeable state, for example, the second switching valve 74 is switched to the cutoff position e and the hydraulic oil discharged from the bottom side pressure chamber 12 of the boom cylinder 10. Are discharged to the tank T through the second passage 42.

  Next, regenerative control by the assist regenerative system 102 performed by the hydraulic oil supplied from the main pump 21 will be described.

  In a state where there is no lever operation by the crew of the hydraulic excavator, the main control valve 30 is in the cutoff position c, and each actuator including the boom cylinder 10 mounted on the hydraulic excavator is stopped. Even in this state, the main pump 21 maintains driving by the rotation of the engine 8 and enters a standby state.

  When there is no lever operation by the crew of the excavator, that is, when each actuator including the boom cylinder 10 mounted on the excavator continues for a predetermined time, the second switching valve 74 is switched to the cutoff position e. At the same time, the first switching valve 76 is switched to the communication position f, and the hydraulic oil discharged from the main pump 21 in the standby state is supplied to the regeneration motor 71 through the first regeneration passage 75. At the same time, the inclination angle of the swash plate of the assist pump 61 is controlled so that the capacity of the assist pump 61 is minimized.

  Thus, since motor generator 81 rotates in synchronization with regenerative motor 71, motor generator 81 generates power and charges power storage device 91. As described above, the hydraulic oil discharged from the main pump 21 in the standby state is not directly returned to the tank T, but is guided to the regenerative motor 71 and effectively used before being returned to the tank T. That is, the hydraulic energy of the hydraulic oil discharged from the main pump 21 is converted into electric energy.

  As described above, when the state where there is no lever operation by the crew of the hydraulic excavator continues for a predetermined time, the regenerative motor 71 is rotated by the hydraulic oil discharged from the main pump 21 so that the motor generator 81 serves as a generator. Standby charging is performed in which the power storage device 91 functions and is charged. During standby charging, the capacity of the main pump 21 is controlled to be optimal for standby charging, and the rotational speed of the engine 8 is also controlled to be optimal for standby charging. The flow rate of the hydraulic oil is stable with little fluctuation. As described above, in standby charging, regeneration is performed by hydraulic oil that is stably discharged from the main pump 21, and therefore, fluctuation in charging current is small and stable continuous compared to regeneration performed when the boom 1 is lowered. Charging is performed.

  Next, assist control by the assist regeneration system 102 performed as necessary when the boom 1 is raised will be described.

  When a lever operation for extending the boom cylinder 10 is performed by a crew member of the hydraulic excavator, the main control valve 30 is switched to the extended position b. As a result, hydraulic oil is supplied to the bottom side pressure chamber 12 of the boom cylinder 10 and hydraulic oil in the rod side pressure chamber 11 is discharged to the tank T through the first passage 41.

  Since the engine that drives the main pump 21 and the like is operated at a predetermined rotational speed and load with good operating efficiency, when it is desired to quickly extend the boom cylinder 10, only the discharge flow rate from the main pump 21 causes the bottom pressure chamber. The flow rate of the hydraulic oil supplied to 12 may be insufficient. In such a case, assist control by the assist regeneration system 102 is executed.

  At the time of assist control, the third switching valve 64 is switched to the communication position h, and the motor generator 81 is driven as an electric motor to drive the assist pump 61. At the same time, the inclination angle of the swash plate of the regenerative motor 71 is controlled so that the torque of the regenerative motor 71 is minimized. As a result, the hydraulic oil discharged from the assist pump 61 joins the main passage 23 through the assist passage 62, so that the assisting force by the assist pump 61 can be applied when the boom cylinder 10 is extended. Accordingly, the boom cylinder 10 can be quickly extended. Thus, when motor generator 81 functions as an electric motor, power storage device 91 functions as a drive source for boom cylinder 10 (drive body).

  According to the above embodiment, there exists an effect shown below.

  In the present embodiment, the capacitor 92 that is a heavy object is raised and accommodated in the casing 93, and a part of the vibration isolation member 96 is disposed in the raising space 95 formed by the raising bracket 94. For this reason, the vibration transmitted to the casing 93 can be suppressed by the vibration isolating member 96, and since it is not necessary to provide a bracket or the like for fixing the vibration isolating member 96 outside the casing 93, the casing 93 can be made compact. .

  Further, by arranging the vibration isolating member 96 between the two raised brackets 94 on which the capacitor 92 is placed, the size of the casing 93 in the lateral direction is the minimum size required to accommodate the capacitor 92. Can be set. For this reason, the casing 93 can be made compact.

  Further, by arranging the vibration isolator member 96 between the raised bracket 94 and the side wall 93b of the casing 93, the vibration isolator member 96 is disposed at a position away from the center of gravity of the capacitor 92 which is a heavy object. The vibration can be improved.

  In addition, since the power storage device 91 is fixed to the vehicle body frame 99 via the rubber part 96a, the vertical and horizontal vibrations transmitted from the vehicle body frame 99 to the power storage device 91 can be reduced. In particular, since the power storage device 91 includes an electronic circuit, the circuit element can be protected from vibration. In the case of a construction machine, the vibration of the vehicle body increases during work, but the vibration transmitted to the casing 93 can be suppressed by the vibration isolation member 96.

  Moreover, in the hybrid construction machine 100, devices related to the hybrid such as the inverter 82 other than the power storage device 91 must be mounted in a limited space. However, since the power storage device 91 becomes compact, these mountability is improved. Can be made.

  The embodiment of the present invention has been described above. However, the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

DESCRIPTION OF SYMBOLS 100 Hybrid construction machine 101 Fluid pressure control system 102 Assist regeneration system 10 Boom cylinder (actuator)
21 Main pump 30 Main control valve 50 Main controller 52 Power storage controller 61 Assist pump (sub pump)
71 Regenerative motor 81 Motor generator (rotary electric machine)
82 Inverter 91 Power storage device 92 Power storage (heavy)
93 Casing 93a Bottom wall 93b Side wall 94 Raised bracket 95 Raised space 96 Anti-vibration member 99 Body frame (installation surface)

Claims (5)

A casing for storing heavy objects,
An anti-vibration member fixed to the bottom wall of the casing and fixed to the installation surface, and supporting the casing with respect to the installation surface;
A raised bracket provided on the bottom wall in the casing and supporting the heavy object at a predetermined height to form a raised space between a lower surface of the heavy object and the bottom wall of the casing; Prepared,
A part of the vibration isolating member is disposed in the raised space. A plurality of the raised brackets are provided,
The casing according to claim 1, wherein the vibration isolating member is disposed between one raised bracket and the other raised bracket.   The casing according to claim 1, wherein the vibration isolation member is disposed between a side wall of the casing and the raised bracket.   The casing according to claim 1, wherein the vibration-proof member is disposed inside a raised bracket having a U-shaped cross-section. A hybrid construction machine comprising the casing according to any one of claims 1 to 4,
A main pump that drives the actuator;
A sub pump that assists in driving the actuator by a main pump;
A regenerative motor driven by a working fluid discharged from the actuator;
A rotating electrical machine coupled to the sub-pump and the regenerative motor;
A capacitor connected via the rotating electrical machine and an inverter,
The hybrid construction machine according to claim 1, wherein the heavy object is the battery.

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