JP2007062680A - Battery fixing structure of working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the burden on an operator when he mounts or removes a battery on/from a working machine. <P>SOLUTION: A battery supporting plate 30 having a battery placing surface 32 is fixed to a revolving body, for example to its side deck 26. A battery cover 40 covering the battery BT is furnished with an outside restraining part 46 so that it 46 abuts to or approaches the battery BT when the battery cover 40 is mounted, and it is arranged so that the battery BT can be drawn out outward in the width direction of the revolving body along the battery placing surface 32 in the condition that the cover 40 is removed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a structure for fixing a battery mounted on a work machine such as a hydraulic excavator.

  Conventionally, as a place where a battery is fixed to a work machine such as a hydraulic excavator, a lower part of a side surface of a revolving body (for example, a portion directly below a driver's seat) is known (Patent Document 1). An example of a structure for fixing the battery at such a location is shown in FIG.

  The side deck 90 shown in the figure constitutes a lower portion of the side surface of the revolving structure, and a battery support plate 92 projects from the side deck 90 on the outer side in the width direction of the revolving structure (front side in the figure). . In the illustrated example, the battery support plate 92 has a battery placement surface 92a on which two batteries BT are placed. On the battery placement surface 92a, the longitudinal direction of the battery BT faces the front-rear direction. The batteries BT are placed so as to be aligned in the front-rear direction in the posture.

  At a predetermined position on the battery mounting surface 92a, an outer restraint plate 94 for restraining the lower portions of the two batteries BT from the outside in the width direction of the revolving structure, and the front and rear batteries BT are arranged on the front side (left side in FIG. 10). Further, front and rear restraint plates 95 and 96 that restrain respectively from the rear side (right side in FIG. 10) are projected, and both batteries BT are mounted in a region surrounded by the restraint plates 94 to 96 and the side deck 90. By being placed, these batteries BT are restrained from four directions.

  Further, a long bolt 97 in the vertical direction is inserted into the gap in the front-rear direction of both batteries BT and screwed into a screw hole (not shown) provided in the battery support plate 92, and the head of the long bolt 97 Since the presser plate 98 is sandwiched between the battery BT and the upper surfaces of the two batteries BT, the presser plate 98 presses both the batteries BT from above. The battery cover 100 is detachably attached to the side deck 90 so as to cover both the fixed batteries BT from the outside.

  In this structure, the battery BT is replaced in the following procedure.

  1) Remove the battery cover 100 from the side deck 90.

  2) Remove the long bolt 97 and the holding plate 98.

  3) Grasp the battery BT and lift it to a position higher than the upper ends of the restraining plates 94 to 96, and pull it out from that height position (outward in the width direction of the swivel body).

4) Set a new battery BT in the reverse order of 1) to 3).
JP-A-11-193548

  In the above structure, in order to remove the battery BT from the work machine, after removing the battery cover 100, the long bolt 97, etc., the battery BT is lifted to a position higher than the upper ends of the restraining plates 94 to 96 and then pulled out. Conversely, in order to mount the battery BT, the battery BT is placed in a region surrounded by the restraint plates 94 to 96 and the side deck 90 from a position higher than the upper ends of the restraint plates 94 to 96. It must be fitted accurately. These operations are troublesome, and the burden on the operator increases as the weight of the battery BT increases.

  In view of such circumstances, an object of the present invention is to reduce a burden on an operator when a battery is attached to or detached from a work machine.

  As a means for solving the above-mentioned problems, the present invention is a structure for fixing a battery to a work machine in which a revolving structure is rotatably mounted on a traveling body, and is provided at a lower side of the revolving body. A battery supporting member having a battery mounting surface on which the battery is mounted and a battery mounted on the mounting surface of the battery supporting member are restrained from a direction orthogonal to the width direction of the swivel body. Battery restraining means, and a battery cover that is detachably attached to the swivel body so as to cover the battery placed on the battery support member from the outside in the width direction of the swivel body. An outer restraint that restrains the battery by contacting or approaching the battery from the outer side in the width direction of the swivel body while being attached to the revolving body. And the battery can be pulled out to the outside in the width direction of the swivel body along the battery mounting surface of the battery support member with the battery cover removed from the swivel body. Is.

  According to such a structure, when the battery is attached or detached, the battery mounted on the battery mounting surface can be directly moved along the battery mounting surface with the battery cover removed from the rotating body. The battery can be pulled out to the outside in the width direction and conversely pushed into a predetermined position (a position where the battery can be restrained by the battery restraining means) along the battery mounting surface, so that the battery can be removed as in the structure shown in FIG. At this time, there is no need to lift the battery from the battery mounting surface or to fit the battery into the specific area from the top when mounting the battery, and the burden on the operator is greatly reduced. In addition, when the battery cover is attached to the swivel body in a state where the battery is restrained by the battery restraining means on the battery mounting surface, the outer restraint portion of the battery cover is the swivel body with respect to the battery. Since the battery is restrained by abutting or approaching from the outside in the width direction of the battery, the battery can be fixed on the battery mounting surface in a stable state as in the conventional structure.

  As the outer restraint portion, for example, a portion that protrudes inward partially from the back surface of the outer wall of the battery cover is suitable.

  In that case, the outer restraint portion may be formed of a member different from the outer wall of the battery cover, but the outer wall of the battery cover is partially recessed inward in the width direction of the swivel body. If the recessed portion is used as the outer restraint portion, the number of parts can be reduced, and the recessed portion can also be used as a design surface of the battery cover or a wall for forming a storage space for a tool or the like.

  The battery cover may include an auxiliary restraining portion constituting a part of the battery restraining means in addition to the outer restraining portion. That is, a part of the battery restraining means may be on the battery cover side.

  In addition, the battery cover includes an opening that opens the upper surface of the battery to the outside of the battery cover in a state where the battery cover is mounted on the revolving structure, and includes a lid that opens and closes the opening. Then, even if the battery cover is not removed from the revolving structure, the battery can be maintained by opening the cover and opening the upper surface of the battery to the outside of the cover through the opening.

  In addition, if the battery cover has a step portion for getting on and off the driver seat provided on the revolving structure, the battery cover can be used as a scaffold for the driver seat. .

  As described above, according to the present invention, there is an effect that it is possible to effectively reduce the burden on the operator by eliminating the need to greatly raise and lower the battery when the battery is attached and detached.

  A preferred embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 shows a main body portion of a work machine (a hydraulic excavator in the illustrated example) according to an embodiment of the present invention, that is, a portion excluding an attachment such as a boom.

  The work machine includes a traveling body 10 and a revolving body 12, and the traveling body 10 includes a main body frame 14 and a crawler 16 for traveling provided on the left and right sides of the main body frame 14. A revolving unit 12 is supported on the main body frame 14 so as to be rotatable about a vertical axis.

  The revolving body 12 has a bottom plate 18 as shown in FIG. A counterweight 20 as shown in FIG. 1 is mounted on the rear end portion of the bottom plate 18, and a pair of left and right boom support plates 22 are erected in the center portion in the width direction on the front side. Further, a cab support portion 23 is formed on the left side of the boom support plate 22 (left side in the traveling direction), and a cab 24 including a driver's seat is erected on the cab support portion 23.

  The cab support portion 23 includes a side deck 26 that forms a lower side surface of the revolving structure 12, an inner deck 27 that is located on the inner side in the width direction of the revolving structure 12 with respect to the side deck 26, and the side deck 26 and the inner deck. 27 and a front deck 28 located on the front side. A battery fixing structure according to the present invention is constructed along the outer side surface of the side deck 26, that is, the lower portion of the side surface of the revolving structure 12.

  This structure includes a battery support plate 30 as shown in FIGS. 2 and 5 and a battery cover 40 as shown in FIGS.

  The battery support plate 30 protrudes horizontally from the lower end of the side deck 26 toward the outer side in the width direction (right side in FIG. 5) of the revolving structure 12, and the upper surface thereof serves as a battery mounting surface 32.

  On the battery placement surface 32, two batteries BT can be placed as shown in FIG. Specifically, both batteries BT can be placed in such a posture that the longitudinal direction of these batteries BT is the front-rear direction of the revolving structure 12 and arranged in the front-rear direction at a predetermined interval.

  From the front and rear ends of the battery support plate 30, a front restraint plate 33 and a rear restraint plate 34 stand up integrally therewith, and the inner ends of the restraint plates 33 and 34 together with the inner end of the battery support plate 30 are described above. It is fixed to the outer surface of the side deck 26 by welding or the like. Both restraint plates 33 and 34 restrain both batteries BT by contacting or approaching the batteries BT arranged on the front side from the front and rear.

  Further, both the batteries BT are also restrained from above by a long bolt 36 and a pressing plate 38 as shown in FIG. The long bolt 36 functions as a spacer when inserted from above into a gap in the front-rear direction formed between the two batteries BT, and can be screwed into a screw hole 37 provided in the battery support plate 30. It has become. The holding plate 38 has a bolt insertion hole 38a through which the long bolt 36 can be inserted, and is inserted between the head 36a of the long bolt 36 and the upper surface of the battery BT in the inserted state. The battery BT is pressed from above.

  Accordingly, both the restraining plates 33, 34, the long bolt 36, and the presser plate 38 constitute battery restraining means that restrains both the batteries BT from a direction orthogonal to the width direction of the revolving structure 12.

  The battery cover 40 integrally includes a cover main body 41 and a step portion 42 located on the front side of the cover main body 41. Bolt insertion holes 43 and 44 are provided in the rear end portion of the cover body 41 and the step portion 42, respectively, and unillustrated bolts inserted into the bolt insertion holes 43 are fixed to the side deck 26 side. While screwed into the screw hole 29a (FIG. 2) of the fixed seat 29, the bolt (not shown) inserted into the bolt insertion hole 44 is screwed into the screw hole 26a (FIG. 2) formed in the side deck 26. A battery cover 40 is detachably attached to the side deck 26.

  In the mounted state, the cover body 41 has a shape that covers both the batteries BT placed on the battery placement surface 32 from the upper side, both front and rear sides, and the outer side in the width direction of the revolving structure 12. In the mounted state, the step portion 42 is positioned immediately below the door 25 of the cab 24 as shown in FIG. 1 so as to form a scaffold for getting on and off the cab 24. Is set.

  Further, as a feature of the battery fixing structure, an outer restraining member 46 is projected inward on the back surface of the outer wall of the cover body 41.

  In the illustrated example, the outer restraining member 46 is formed by bending a plate material into a U-shape in plan view, and both ends thereof are fixed to the back surface of the outer wall of the cover body 41 by welding or the like. The position of the outer restraining member 46 and the amount of protrusion P (FIG. 5) from the rear surface of the outer wall are such that the battery cover 40 is attached to the side deck 26 and the both batteries BT are in contact with the side deck 26. In a state of being placed on the battery placement surface 32 at a position, the front end surface of the outer restraint member 46 abuts or approaches the outer surfaces of the two batteries BT so as to restrain the battery BT. Is set.

  The cover body 41 is formed with an opening 47 (FIG. 4A) that opens upward and outward, and a lid 48 that opens and closes the opening 47 is attached. The upper surface of the battery BT is opened to the outside of the cover in a state where is opened. Specifically, the lid 48 has a substantially L-shaped cross section that covers the opening 47 from the upper side and the outer side in the revolving body width direction, and the lower part thereof can rotate about a horizontal axis. The cover body 41 is attached.

  According to this battery fixing structure, for example, both batteries BT can be easily replaced in the following manner.

  1) Remove the battery cover 40 from the side deck 26. By removing the battery cover 40, the battery BT is largely opened to the side of the swing body 12, and the restraint from the outside in the swing body width direction by the outer restraint member 46 provided on the cover 40 is released. become.

  2) Loosen the clamping of the holding plate 38 by the bolt 36. That is, the restraint of the battery BT from the upper side is loosened.

  3) Grasp the battery BT and pull out the battery BT in the horizontal direction to the near side (outside the revolving body width) along the battery placement surface 32 of the battery support plate 30 as it is. At this time, unlike the conventional structure shown in FIG. 10, it is not necessary to lift the battery BT greatly, and the burden on the operator is greatly reduced.

  4) Push the new battery BT from the near side to the position where the back of the battery BT hits the side deck 26 in the reverse manner to 3). At this time, the battery BT may be pushed toward the side deck 26 while being slid on the battery mounting surface 32 in a state where the battery BT is mounted on the battery mounting surface 32. A specific structure like the conventional structure shown in FIG. There is no need for difficult work such as lowering the battery BT from above in the restricted area.

  5) The battery BT is pressed from above by the bolt 36 and the pressing plate 38, and the battery cover 40 is mounted so as to cover them. By this mounting, the outer restraining member 46 of the battery cover 40 restrains the battery BT from the outer side in the revolving body width direction, and the fixing of the battery BT is completed. Further, the step portion 42 of the battery cover 40 functions as a scaffold interposed between the upper surface of the left crawler 16 and the door 25 of the cab 24.

  Since the battery cover 40 is provided with an opening 47 and a lid 48 for opening and closing the battery cover 40, maintenance work other than replacement of the battery BT (for example, water replenishment work, terminal removal work, liquid amount check work) is performed. At this time, it is not always necessary to remove the battery cover 40. That is, when the cover 48 of the cover 40 is opened, the upper surface of the battery BT is opened to the outside of the cover through the opening 47 of the cover body 41, so that the maintenance work can be performed through the opening 47.

  In the structure shown in FIGS. 1 to 5, the battery BT on the battery mounting surface 32 is restricted only from the outer side in the swivel width direction by the outer restricting member 46 on the battery cover 40 side. Restraining from other directions is performed by the restraining plates 33 and 34 on the side of the battery support plate 30 and the presser plate 38. For example, as shown in FIG. 6, the restraining plates 33 and 34 are omitted. Are provided on the front and rear wall sides of the battery cover 40 so as to protrude inward from the inner surface thereof, and these auxiliary restraint members 46 ′ are arranged on the front side of the front and rear batteries BT when the battery cover 40 is mounted. You may make it contact | abut or adjoin from the rear side. Alternatively, either one of the restraining plates 33 and 34 may be omitted, and only the auxiliary restraining member 46 ′ corresponding thereto may be provided on the battery cover 40.

  Further, the “outer restraint portion” according to the present invention does not necessarily have to be constituted by a member different from the member constituting the cover main body 41 of the battery cover 40, for example, as shown in FIGS. 7 (a) and 7 (b). As described above, an appropriate portion of the outer wall 41a of the cover body 41 is recessed inward in the swivel width direction to form one or a plurality of (three in the example shown in FIG. 7) recesses 41b, 41c, 41d. You may make it use the recessed parts 41b-41d as an outer side restraint part. In such a structure, there is an advantage that the concave portions 41b to 41d can be used as the design surface of the battery cover 40 and the outer restraint portion.

  Alternatively, by setting the recess depth of the recess to be large, the recess can be used as a storage space (for example, a tool box) opened to the outside of the cover. In the example shown in FIG. 8, the concave portion 41e having a large depth dimension serves as both an outer restraint portion that restrains the battery BT from the outer side in the revolving body width direction and a wall that surrounds the storage space 50. A lid 49 that opens and closes is rotatably attached to the outer wall 41 a of the cover body 41.

  In addition, the present invention can take the following embodiments, for example.

  In the present invention, the number and layout of the batteries BT to be mounted are not particularly limited. For example, when there is a battery storage space margin in the width direction of the revolving structure, a plurality of batteries BT are arranged in the width direction of the revolving structure (in the figure, a direction substantially orthogonal to the side deck 26) as shown in FIG. You may do it.

  -The structure for making the battery cover detachable with respect to the revolving structure is not limited to the illustrated example. For example, one end of the battery cover 40 in the front-rear direction is pivotally connected to the side deck 26 shown in FIG. 1 and the other end is detachably engaged with the side deck 26. A portion (lock mechanism) may be provided. That is, the battery cover 40 may be openable.

It is a perspective view which shows the external appearance of the working machine which concerns on embodiment of this invention. It is a perspective view which shows the frame structure of the turning body in the said working machine. FIG. 3 is a perspective view showing a main part of a battery cover attached to the frame structure shown in FIG. 2. (A) is the perspective view which looked at the said battery cover from the outer side, (b) is the perspective view which looked at the same cover from the inner side. It is a cross-sectional front view which shows the mounting state of the said battery cover. FIG. 4 is a perspective view showing an embodiment in which an auxiliary restraint portion is provided on the battery cover in addition to an outer restraint portion. (A) is a perspective view which shows the battery cover in which the recessed part which comprises an outer side restraint part was formed in the outer wall, (b) is a cross-sectional front view which shows the mounting state of the cover. FIG. 6 is a cross-sectional front view illustrating a mounted state of the battery cover in which a concave portion serving as an outer restraint portion and a storage space forming wall is formed on the outer side wall. It is a perspective view which shows the example in which two batteries were arranged in the rotation body width direction on the battery mounting surface. It is a perspective view which shows the example of the conventional battery fixing structure.

Explanation of symbols

BT battery 10 traveling body 12 revolving body 24 cab 25 door 26 side deck 30 battery support plate 32 battery mounting surface 33 front side restraint plate (battery restraint means)
34 Rear restraint plate (battery restraint means)
36 Long bolt (battery restraint means)
36a Head 38 Presser plate (battery restraint means)
40 Battery Cover 41 Cover Body 41a Outer Side Walls 41b to 41e Recess 42 Step Part 46 Outer Restraint Member 46 'Auxiliary Restraint Member 47 Opening 48 Lid 50 Storage Space

Claims (6)

  A structure for fixing a battery to a work machine on which a revolving unit is rotatably mounted on a traveling body, the battery mounting surface being provided at a lower portion of the side surface of the revolving body and on which the battery is mounted A battery support member, battery restraint means for restraining the battery placed on the placement surface of the battery support member from a direction orthogonal to the width direction of the revolving unit, and placed on the battery support member A battery cover that is detachably attached to the revolving body so as to cover the battery from the outside in the width direction of the revolving body, and the battery cover is attached to the revolving body with respect to the battery. An outer restraint portion for restraining the battery by contacting or approaching from the outside in the width direction of the revolving body, and Battery fixing structure for a working machine wherein in a state in which the removed battery is characterized in that it is configured to be drawn out to the outside in the width direction of the turning body along the battery mounting surface of the battery supporting member.   2. The battery fixing structure for a working machine according to claim 1, wherein the outer restraint portion partially protrudes inward from the back surface of the outer wall of the battery cover.   The battery fixing structure for a work machine according to claim 2, wherein the outer wall of the battery cover is partially recessed inward in the width direction of the revolving structure, and the recessed portion constitutes the outer restraint portion. A battery fixing structure for a working machine.   The battery fixing structure for a working machine according to any one of claims 1 to 3, wherein the battery cover includes an auxiliary restraining portion that constitutes a part of the battery restraining means in addition to the outer restraining portion. The battery fixing structure of the working machine.   The battery fixing structure for a work machine according to any one of claims 1 to 4, wherein the battery cover opens an upper surface of the battery to the outside of the battery cover in a state where the battery cover is mounted on the revolving unit. A battery fixing structure for a working machine comprising an opening and a lid for opening and closing the opening.   6. The work machine battery fixing structure according to claim 1, wherein the battery cover has a step portion for getting on and off a driver's seat provided on the revolving structure. Machine battery fixing structure.

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