JP2008044408A - Battery holding structure of battery-driven construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery holding structure of a battery-driven construction machine, capable of efficiently mounting a plurality of batteries. <P>SOLUTION: This battery holding structure of the battery-driven construction machine has cylinders 34a to 34c, a driving battery 241, inverters 231a to 231e, and electric motors 271, 274, 281 and 431L, and has a casing 5 capable of storing a plurality of driving batteries 241, a stand 6 storing this casing 5 so as to be capable of layering a plurality of stages, and a stopper shaft 7 capable of fixing the casing 5 to this stand 6, and is constituted so that the casing 5 has a projecting holder 52 on the upper end of a column 51, and has a recessed holder 53 on the lower end, and the stand 6 has a projecting holder 63 engageable with a recessed holder 23 of the casing 5 on a bottom plate 62. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a battery holding structure of a battery-driven construction machine such as a battery-driven hydraulic excavator provided with a battery and an electric motor that transmits power to an actuator.

  Construction machines are used in civil engineering work, industrial waste industry, etc., but there is a demand for suppressing exhaust gas generated by driving an engine and reducing noise vibration. For this reason, Patent Document 1 proposes a construction machine that uses a battery that can reduce noise and vibration without exhausting exhaust gas at all. This prior art has a configuration in which a hydraulic pump is driven by an electric motor, that is, an electric motor, and pressure oil from the hydraulic pump is supplied to an actuator to operate the vehicle body.

In addition to the battery type, the one driven by commercial power is disclosed in Patent Document 2. The prior art disclosed in Patent Document 2 is configured as a cable type. Such a cable type is restricted by the length of the cable, and thus is restricted by the moving range of the construction machine. The battery type as shown in Patent Document 1 has the advantage that it can move freely and work without receiving the above-mentioned restrictions.
Japanese Patent Laid-Open No. 10-30259 Japanese Utility Model Publication No. 56-156301

  In general, a battery is made of lead, Li ions, nickel hydride, or the like, and has a minimum unit structure called one cell. The final form on the commercial level is a single module with a plurality of cells in one pack. Due to the trade-off between battery capacity and the required power of battery-powered construction machinery, battery-powered construction machinery may be equipped with multiple modules, that is, multiple batteries. Consideration was not paid to mounting well.

  The present invention has been made from the above-described actual state of the prior art, and an object thereof is to provide a battery holding structure for a battery-driven construction machine that can efficiently mount a plurality of batteries.

To achieve this object, the present invention provides a battery-driven construction comprising an actuator, a battery, an inverter that controls the power of the battery, and an electric motor that transmits power to the actuator via the output voltage of the inverter. In the battery holding structure of the machine,
The apparatus includes a casing capable of storing a plurality of the batteries, a pedestal that accommodates the casing in a stackable manner, and a fixing unit that can fix the casing to the pedestal.

  In the present invention configured as described above, since the casings in which a plurality of batteries are stored are stacked on the gantry, the plurality of batteries can be efficiently mounted and necessary power can be secured. In addition, when the battery has reached the end of its life by removing the fixing between the base and the case by the fixing means, the case is removed from the base and the battery stored in the case can be easily replaced with a new one. Can be replaced. Furthermore, the battery can be held by the fixing means without being affected by vibration from the vehicle body.

  Further, in the above invention, the present invention is characterized in that the casing has a support column extending in the vertical direction and a screw hole formed for lifting, and is disposed on one of the upper end and the lower end of the support column. A mold holder, a concave holder formed in a shape engageable with the convex holder, disposed on the other of the upper end and the lower end of the support column, and further having a through hole included in the fixing means It is characterized by.

  According to the present invention configured as described above, a plurality of cases can be easily positioned and stacked via the convex holders or the concave holders that can be engaged with each other formed at the upper and lower ends of the columns. In addition, by screwing the lifting tool into the screw hole formed for lifting, it is possible to easily perform a stacking operation of a plurality of casings or a task of removing a corresponding casing from a plurality of stacked casings. .

  Further, in the above invention, the present invention includes the gantry in the fixing means, the concave holder or the convex holder engageable with the convex holder or the concave holder of the housing, and the fixing means. And a stopper shaft which is included in the fixing means and can be inserted into the through hole of the housing and the through hole of the gantry. It is characterized by having.

  The present invention configured as described above can easily position and mount the housing arranged at the lowermost stage on the gantry via a convex holder or a concave holder that can be engaged with each other. Further, the gantry and the housing can be easily fixed by inserting the stopper shafts into the through holes of the housing and the through holes of the gantry. Further, by pulling out the stopper shaft, the fixing between the gantry and the housing can be easily released.

  Further, in the above invention, the present invention is characterized in that the gantry includes a bottom plate on which the casing is mounted, and a side plate that is provided so as to be opposed to each other from the bottom plate and in which the casing is disposed. The concave holder or the convex holder that can be engaged with the convex holder or the concave holder of the casing is formed on the bottom plate, and the through hole formed to fit the through hole of the casing It is characterized by being formed on each of the side plates.

  Further, in the above invention, the present invention provides the stopper shaft having a head having a dimension larger than that of the through hole in the side surface of the gantry at one end, a threaded portion at the other end, and a side plate of the gantry. A threaded portion that is screwed into the threaded portion of the stopper shaft is formed in the through hole of one side plate.

  According to the present invention configured as described above, the stopper shaft can be firmly fixed to the gantry by screwing the stopper shaft into a screw portion formed on one of the side plates of the gantry.

  In the present invention, the stopper shaft has a head having a larger dimension at one end than a through hole on the side surface of the gantry, a pin hole at the other end, and the pin hole of the stopper shaft. And a pin for locking the stopper shaft to the gantry.

  In the present invention configured as above, the stopper shaft can be firmly fixed to the gantry by inserting the pin into the pin hole of the stopper shaft.

  The present invention includes a housing that can store a plurality of batteries, a gantry that accommodates the housing in a stackable manner, and a fixing unit that can fix the housing to the gantry. It can be mounted efficiently, so that necessary power can be secured and it is practical. In addition, the battery can be easily replaced, and the battery can be held without being affected by vibrations from the vehicle body, thereby ensuring high reliability.

  The best mode for carrying out the battery holding structure of a battery-driven construction machine according to the present invention will be described below with reference to the drawings.

[Battery-driven construction machine provided with this embodiment]
FIG. 1 is a side view showing a battery-driven hydraulic excavator cited as an example of a battery-driven construction machine provided with an embodiment of a battery holding structure according to the present invention, and FIG. 2 is a diagram of the battery-driven hydraulic excavator shown in FIG. FIG. 3 is a front view showing the main part of the battery-driven hydraulic excavator shown in FIG.

  As shown in FIG. 1, a battery-driven construction machine equipped with a battery holding structure according to the present embodiment, for example, a battery-driven hydraulic excavator 1, includes a traveling body 4 and a revolving body 2 disposed on the traveling body 4. And a front work machine 3 attached to the revolving body 2 so as to be rotatable in the vertical direction.

  The front work machine 3 includes a boom 31 attached to the swing body 2 so as to be rotatable in the vertical direction, an arm 32 connected to the tip of the boom 31 so as to be rotatable in the vertical direction, and And a bucket 33 that is coupled so as to be rotatable in a direction. Further, hydraulic actuators such as a boom cylinder 34 a for operating the boom 31, an arm cylinder 34 b for operating the arm 32, and a bucket cylinder 34 c for operating the bucket 33 are provided.

  As shown in FIG. 3, the traveling body 4 mainly includes a track frame 41, a turning bearing 42 for turning the turning body 2, traveling mechanisms 43L and 43R, endless track crawler tracks 44L and 44R, and the like.

  As shown in FIG. 2, the revolving unit 2 mainly includes a slip ring 21, a conductor control panel 22, an inverter storage unit 23, a battery storage unit 24, a hydraulic oil tank 25, and a main frame 20. A hydraulic control unit 26, a hydraulic pump storage unit 27, a turning mechanism 28 (not shown), a cab 29, and the like are mounted. Although not shown, auxiliary equipment such as an oil cooler is also provided.

  The slip ring 21 transmits electric power of a driving battery 241 to be described later to the traveling mechanisms 43L and 43R without being obstructed by the rotation of the revolving structure 2.

  The inverter storage unit 23 includes a cover 232 that covers the plurality of stored inverters 231a to 231e. In this embodiment, the inverter 231a is for driving the hydraulic pump, the inverter 231b is for turning, the inverters 231c and d are for traveling, and the inverter 231e is for driving the pilot hydraulic pump.

  The battery storage unit 24 includes a plurality of drive batteries 241 stored at a high voltage and a cover 243 that covers a plurality of control batteries 242 at a low voltage.

  Although not shown, the conductor control panel 22 is provided with a conductor for switching power from the driving battery 241 and a breaker. In addition to this, a battery controller 221 for managing the remaining battery level and the like is provided. The remaining battery level can be detected by measuring the battery current and calculating the accumulated time, or calculating the open terminal voltage of the battery (the voltage when no load is applied to the battery). When measuring the current and terminal voltage, a signal is sent from the cell controller (not shown) that monitors the cells constituting the battery to the battery controller 221.

  The hydraulic control unit 26 includes a hydraulic control valve 261 that supplies pressure oil to the cylinders 34 a to 34 c that drive the above-described front work machine 3, and a pilot valve 262 that controls the hydraulic control valve 261.

  The hydraulic pump storage part 27 is also constituted by a cover. In the hydraulic pump housing portion 27, a hydraulic pump driving electric motor, that is, a hydraulic pump driving electric motor 271, a hydraulic pump 272, a coupling 273 that connects the shaft of the electric motor 271 and the shaft of the hydraulic pump 272. And a pilot hydraulic pump electric motor, that is, an electric motor 274 for the pilot hydraulic pump, a pilot hydraulic pump 275, and a coupling 276 for connecting the shaft of the electric motor 274 and the shaft of the pilot hydraulic pump 275. .

  A display device 46 for displaying the result of the remaining battery level calculated by the battery controller 221 via the wiring 47 is provided in the cab 29.

  The turning mechanism 28 described above has a structure in which the turning electric motor shown in FIG. 3, that is, the turning electric motor 281 is fastened to the turning speed reducer 282 with bolts or the like, and the whole is fastened and fixed to the main frame 20 with bolts or the like. It has become.

  The power of the turning electric motor 281 is decelerated and increased by the turning speed reducer 282 and transmitted through the meshing of the pinion gear, which is the final end of the turning speed reducer 282, with the gear of the turning bearing 42, whereby the turning body 2 turns. To do.

  The travel mechanisms 43L and 43R described above have the same configuration, and are arranged on the left and right with the track frame 41 interposed therebetween. For example, the traveling mechanism 43L arranged on the left side in the vehicle body traveling direction has a configuration in which a traveling electric motor, that is, a traveling electric motor 431L is fastened to the traveling speed reducer 432L with a bolt or the like, and is entirely fastened to the track frame 41 with a bolt or the like It is supposed to be fixed. In order to transmit power from the traveling speed reducer 432L to the endless track crawler 44L, a sprocket 433L is fastened to the traveling speed reducer 432L with a bolt or the like. Further, the electric motor 431L for travel is covered with a protective cover 411L in order to protect it from external obstacles (rocks, earth, etc.). The other traveling mechanism 43R has the same configuration as described above.

[Battery Holding Structure According to this Embodiment]
4 is a perspective view showing a housing provided in the battery holding structure according to the present embodiment, and FIG. 5 is a perspective view showing a state in which a plurality of batteries are housed in the housing shown in FIG. 6 is a perspective view showing a gantry provided in the battery holding structure according to the present embodiment, and FIG. 7 is a perspective view showing a state where a stopper shaft is attached to the gantry shown in FIG. FIG. 8 is a perspective view showing a state in which a plurality of cases in which a plurality of batteries are housed are stacked inside the gantry shown in FIG. 6, and FIG. 9 is an enlarged view of a main part shown in FIG.

  The battery holding structure according to the present embodiment is provided in the battery-driven hydraulic excavator described above. As shown in FIG. 5, for example, as shown in FIG. A structure is provided that includes a gantry 6 that accommodates the casing 5 in a stackable manner and a fixing means that can fix the casing 5 to the gantry 6.

  As shown in FIG. 4, the housing 5 includes a plurality of support columns 51 extending in the vertical direction and screw holes formed for lifting, for example, screw holes 56 for eyebolts, arranged in parallel with each other. And a pipe member 54a inserted through each of the plates 55 in the vicinity of both ends. Inside these pipe members 54a, through holes 54 through which stopper shafts 7 to be described later are inserted are formed.

  A convex holder 52 is arranged at one of the upper end and the lower end of each of the columns 51 described above, for example, at the upper end, and a concave holder 53 formed in a shape engageable with the convex holder 52 is arranged at the lower end. It is.

  As shown in FIG. 5, a plurality of driving batteries 241 can be stored in the housing 5 configured as described above.

  As shown in FIG. 6, the gantry 6 includes a bottom plate 62 on which the housing 5 is mounted, and a pair of side plates 61 provided so as to stand from the bottom plate 62 and face each other.

  A convex holder 63 that can be supplied to, for example, the concave holder 53 of the housing 5 is formed on the bottom plate 62. A plurality of through holes 64 are formed in each of the side plates 61 along the vertical direction. A threaded portion 65 is formed in the through hole 64 of one of the side plates 61. The threaded portion 65 is made of a nut welded to the side plate 61, for example. Each of the above-described through holes 64 is formed so as to match the through hole 54 of each housing 5 when the housing 5 is disposed between the side plates 61 of the gantry 6 and on the bottom plate 62.

  As shown in FIG. 8, a plurality of casings 5 are stacked in the gantry 6 configured as described above. When the housing 5 is mounted in the gantry 6, the concave holder 53 at the lower end of the column 51 of the lowermost housing 5 is engaged with the convex holder 63 of the gantry 6 as shown in FIG. Arranged so that the convex holder 52 at the upper end of the column 51 of the lowermost casing 5 is engaged and laminated with the concave holder 53 at the lower end of the column 51 of the casing 5 disposed thereon. It has become.

  Through the through hole 54 of the housing 5, the through hole 64 formed in each of the side plates 61 of the gantry 6, the screw portion 65 provided in one of these through holes 64, and the stopper shaft 7, the gantry 6 is attached. The fixing means described above that can fix the housing 5 is configured.

  The operation of mounting a plurality of driving batteries 241 on this embodiment configured as described above is performed as follows. That is, as shown in FIG. 5, a plurality of driving batteries 241 are housed on one housing 5 formed as shown in FIG. Thus, for example, three housings 5 in which a plurality of drive batteries 241 are stored are prepared.

  Next, an eyebolt is screwed into the screw hole 56 of the casing 5 arranged at the lowermost stage, and the lowermost casing 5 is housed while being suspended in the gantry 6 shown in FIG. Hereinafter, the eyebolts are utilized when the housing 5 is similarly stored in the gantry 6. At this time, as shown in FIG. 9, the concave holder 53 at the lower end of the column 51 of the housing 5 is accommodated in the convex holder 63 of the bottom plate 62 of the gantry 6. Here, for example, the lowermost stopper shaft 7 is inserted into the through hole 64 of the gantry 6 and the through hole 54 of the housing 5, and the end thereof is screwed into the screw portion 65 of the gantry 6. As a result, the lowermost casing 5 is fixed to the gantry 6.

  Next, the eyebolts attached to the lowermost casing 5 are removed, the eyebolts are attached to the casing 5 arranged in the second stage, and the casing 5 is stored in the gantry 6. At this time, as shown in FIG. 9, the concave holder 53 at the lower end of the column 51 of the second stage 5 is engaged with the convex holder 52 at the upper end of the column 51 of the casing 5 arranged at the lowest level. In this way it is stored. Here, for example, the second stage stopper shaft 7 is inserted into the through hole 64 of the gantry 6 and the through hole 54 of the second stage housing 5, and the end thereof is screwed into the screw part 65 of the gantry 6. Combine. As a result, the second-stage casing 5 is fixed to the gantry 6 in a state where the second-stage casing 5 is stacked on the lowermost casing 5 and is positioned relative to each other.

  Next, the eyebolts attached to the second-stage casing 5 are removed, the eyebolts are attached to the casing 5 arranged in the third-stage, and the casing 5 is stored in the gantry 6. At this time, the concave holder 53 at the lower end of the column 51 of the third stage 5 is engaged with the convex holder 52 at the upper end of the column 51 of the casing 5 arranged in the second level. . Here, the stopper shaft 7 for the third stage is inserted into the through hole 64 of the gantry 6 and the through hole 54 of the housing 5 for the third stage, and the end thereof is screwed into the screw part 65 of the gantry 6. Let Accordingly, the third-stage casing 5 is fixed to the gantry 6 in a state where the third-stage casing 5 is stacked on the second-stage casing 5 and is positioned relative to each other. As a result, as shown in FIG. 8, the casing 5 in which a plurality of drive batteries 241 are stored is fixed to the gantry 6 in a state where three stages are stacked.

  According to the present embodiment configured as described above, the housing 5 in which the plurality of driving batteries 241 are housed is stacked in three stages on the mount 6, so that the plurality of driving batteries 241 can be efficiently mounted. The necessary power can be secured. For example, in the hydraulic excavator provided with the present embodiment, when work that is a heavy load such as civil engineering work is performed, the number of drive batteries 241 is increased by increasing the number of stages of the casing 5, thereby separating the industrial waste. When a relatively light load operation such as the above is performed, the number of drive batteries 241 may be reduced by reducing the number of stages of the casing 5. As described above, this embodiment can reliably supply power required according to the type of work, and is highly practical.

  Further, according to the present embodiment, when the stopper battery 7 included in the fixing means is pulled out to release the fixation between the gantry 6 and the housing 5, The housing 5 can be removed from the gantry 6 and the driving battery 241 stored in the housing 5 can be easily replaced with a new one. Furthermore, since the housing 5 is fixed to the gantry 6 with the stopper shaft 7, the driving battery 241 can be held without being affected by vibrations from the vehicle body. Accordingly, high reliability can be ensured.

  In the above-described embodiment, the convex holder 52 is provided at the upper end of the column 51 of the housing 5 and the concave holder 53 is provided at the lower end. Conversely, the concave holder 52 is provided at the upper end of the column 51, You may make it the structure which provided the convex holder 52 in the lower end. In this case, the bottom plate 62 of the gantry 6 may be provided with a concave holder.

  In the above embodiment, the stopper shaft 7 has a threaded portion that engages with the threaded portion 65 of the side plate 61 of the gantry 6 at the end. However, the present invention is not limited to this configuration. I can't. That is, the stopper shaft 7 is formed to have a pin hole penetrating in the radial direction without having a threaded portion, and provided with a pin that can be inserted into the pin hole, and the through hole 54 of the housing 5 and the mount 6 The above-described pin may be inserted into the pin hole of the stopper shaft 7 inserted through the through-hole 64 to fix the stopper shaft 7 to the gantry.

It is a side view which shows the battery drive type hydraulic excavator mentioned as an example of the battery drive type construction machine with which one Embodiment of the battery holding structure which concerns on this invention is provided. It is a top view which shows the principal part of the battery drive type hydraulic shovel shown in FIG. It is a front view which shows the principal part of the battery drive type hydraulic shovel shown in FIG. It is a perspective view which shows the housing | casing with which the battery holding structure which concerns on this embodiment is equipped. It is a perspective view which shows the state which accommodated the some battery in the inside of the housing | casing shown in FIG. It is a perspective view which shows the mount frame with which the battery holding structure which concerns on this embodiment is equipped. It is a perspective view which shows the state which attached the stopper shaft to the mount frame shown in FIG. It is a perspective view which shows the state which laminated | stacked the housing | casing which accommodated the several battery in the inside of the mount frame shown in FIG. It is a principal part enlarged view shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Battery drive type hydraulic excavator 2 Rotating body 231a-231e Inverter 24 Battery storage part 241 Drive battery 242 Control battery 243 Cover 271 Hydraulic pump drive electric motor (hydraulic pump drive motor)
274 Electric motor for pilot hydraulic pump (motor for pilot hydraulic pump)
281 Electric motor for turning (turning electric motor)
3 Front Work Machine 34a Boom Cylinder 34b Arm Cylinder 34c Bucket Cylinder 4 Traveling Body 431L Electric Motor for Traveling (Motor Motor for Traveling)
5 Housing 51 Strut 52 Convex Holder 53 Concave Holder 54 Through-hole (Fixing Means)
54a Pipe material (fixing means)
55 Plate 56 Screw hole 6 Base 61 Side plate 62 Bottom plate 63 Convex holder (fixing means)
64 Through hole (fixing means)
65 Screw part (fixing means)
7 Stopper shaft (fixing means)

Claims (6)

In a battery holding structure of a battery-driven construction machine having an actuator, a battery, an inverter that controls electric power of the battery, and an electric motor that transmits power to the actuator via an output voltage of the inverter,
A battery-driven construction comprising: a casing capable of storing a plurality of the batteries; a pedestal for storing the casings in a stackable manner; and a fixing means for fixing the casing to the pedestal. Machine battery holding structure. In the invention of claim 1,
The housing is
A convex holder that has a pillar extending in the vertical direction and a screw hole formed for lifting, and a shape that can be engaged with the convex holder, arranged at one of the upper end and the lower end of the pillar. A battery holding structure for a battery-driven construction machine, characterized in that it has a concave holder formed on the other of the upper end and the lower end of the column and further has a through hole included in the fixing means. In the invention of claim 2,
The above frame is
A concave holder or a convex holder included in the fixing means and engageable with the convex holder or the concave holder of the casing, and included in the fixing means so as to fit in a through hole of the casing. And having a through hole formed,
A battery holding structure for a battery-driven construction machine, comprising a stopper shaft that is included in the fixing means and can be inserted into the through hole of the housing and the through hole of the mount. In the invention of claim 3,
The gantry includes a bottom plate on which the casing is mounted, and a side plate that is provided so as to stand from the bottom plate and face each other, and in which the casing is disposed,
Forming the concave holder or convex holder that can be engaged with the convex holder or concave holder of the casing on the bottom plate;
A battery holding structure for a battery-driven construction machine, wherein the through holes formed to fit the through holes of the housing are formed in each of the side plates. In the invention of claim 4,
The stopper shaft has a head having a size larger than that of the through hole on the side surface of the gantry at one end, and a threaded portion at the other end.
A battery holding structure for a battery-driven construction machine, wherein a threaded portion that is screwed into the threaded portion of the stopper shaft is formed in a through hole of one of the side plates of the gantry. In the invention of claim 4,
The stopper shaft has a head having a larger dimension than the through hole on the side surface of the gantry at one end, and a pin hole at the other end,
A battery holding structure for a battery-powered construction machine, comprising a pin inserted into the pin hole of the stopper shaft and locking the stopper shaft to the gantry.

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